diff --git a/README.md b/README.md
index d85dfe4fc5..ed27abed2e 100644
--- a/README.md
+++ b/README.md
@@ -208,6 +208,7 @@ Please read the [contribution guide](CONTRIBUTING.md) if you want to collaborate
 | -------------------------------------------------- | ---------------------------------------------------------------------------------------------|
 | [skopeo-copy(1)](/docs/skopeo-copy.1.md)           | Copy an image (manifest, filesystem layers, signatures) from one location to another.        |
 | [skopeo-delete(1)](/docs/skopeo-delete.1.md)       | Mark the image-name for later deletion by the registry's garbage collector.                                                                |
+| [skopeo-generate-sigstore-key(1)](/docs/skopeo-generate-sigstore-key.1.md)    | Generate a sigstore public/private key pair.  |
 | [skopeo-inspect(1)](/docs/skopeo-inspect.1.md)     | Return  low-level  information about image-name in a registry.                                |
 | [skopeo-list-tags(1)](/docs/skopeo-list-tags.1.md) | Return a list of tags for the transport-specific image repository.                               |
 | [skopeo-login(1)](/docs/skopeo-login.1.md)         | Login to a container registry.                                                               |
diff --git a/cmd/skopeo/generate_sigstore_key.go b/cmd/skopeo/generate_sigstore_key.go
new file mode 100644
index 0000000000..e7b5828bc5
--- /dev/null
+++ b/cmd/skopeo/generate_sigstore_key.go
@@ -0,0 +1,90 @@
+package main
+
+import (
+	"errors"
+	"fmt"
+	"io"
+	"io/fs"
+	"os"
+
+	"github.com/containers/image/v5/pkg/cli"
+	"github.com/containers/image/v5/signature/sigstore"
+	"github.com/spf13/cobra"
+)
+
+type generateSigstoreKeyOptions struct {
+	outputPrefix   string
+	passphraseFile string
+}
+
+func generateSigstoreKeyCmd() *cobra.Command {
+	var opts generateSigstoreKeyOptions
+	cmd := &cobra.Command{
+		Use:     "generate-sigstore-key [command options] --output-prefix PREFIX",
+		Short:   "Generate a sigstore public/private key pair",
+		RunE:    commandAction(opts.run),
+		Example: "skopeo generate-sigstore-key --output-prefix my-key",
+	}
+	adjustUsage(cmd)
+	flags := cmd.Flags()
+	flags.StringVar(&opts.outputPrefix, "output-prefix", "", "Write the keys to `PREFIX`.pub and `PREFIX`.private")
+	flags.StringVar(&opts.passphraseFile, "passphrase-file", "", "Read a passphrase for the private key from `PATH`")
+	return cmd
+}
+
+// ensurePathDoesNotExist verifies that path does not refer to an existing file,
+// and returns an error if so.
+func ensurePathDoesNotExist(path string) error {
+	switch _, err := os.Stat(path); {
+	case err == nil:
+		return fmt.Errorf("Refusing to overwrite existing %q", path)
+	case errors.Is(err, fs.ErrNotExist):
+		return nil
+	default:
+		return fmt.Errorf("Error checking existence of %q: %w", path, err)
+	}
+}
+
+func (opts *generateSigstoreKeyOptions) run(args []string, stdout io.Writer) error {
+	if len(args) != 0 || opts.outputPrefix == "" {
+		return errors.New("Usage: generate-sigstore-key --output-prefix PREFIX")
+	}
+
+	pubKeyPath := opts.outputPrefix + ".pub"
+	privateKeyPath := opts.outputPrefix + ".private"
+	if err := ensurePathDoesNotExist(pubKeyPath); err != nil {
+		return err
+	}
+	if err := ensurePathDoesNotExist(privateKeyPath); err != nil {
+		return err
+	}
+
+	var passphrase string
+	if opts.passphraseFile != "" {
+		p, err := cli.ReadPassphraseFile(opts.passphraseFile)
+		if err != nil {
+			return err
+		}
+		passphrase = p
+	} else {
+		p, err := promptForPassphrase(privateKeyPath, os.Stdin, os.Stdout)
+		if err != nil {
+			return err
+		}
+		passphrase = p
+	}
+
+	keys, err := sigstore.GenerateKeyPair([]byte(passphrase))
+	if err != nil {
+		return fmt.Errorf("Error generating key pair: %w", err)
+	}
+
+	if err := os.WriteFile(privateKeyPath, keys.PrivateKey, 0600); err != nil {
+		return fmt.Errorf("Error writing private key to %q: %w", privateKeyPath, err)
+	}
+	if err := os.WriteFile(pubKeyPath, keys.PublicKey, 0644); err != nil {
+		return fmt.Errorf("Error writing private key to %q: %w", pubKeyPath, err)
+	}
+	fmt.Fprintf(stdout, "Key written to %q and %q", privateKeyPath, pubKeyPath)
+	return nil
+}
diff --git a/cmd/skopeo/generate_sigstore_key_test.go b/cmd/skopeo/generate_sigstore_key_test.go
new file mode 100644
index 0000000000..a676d3eeda
--- /dev/null
+++ b/cmd/skopeo/generate_sigstore_key_test.go
@@ -0,0 +1,79 @@
+package main
+
+import (
+	"os"
+	"path/filepath"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestGenerateSigstoreKey(t *testing.T) {
+	// Invalid command-line arguments
+	for _, args := range [][]string{
+		{},
+		{"--output-prefix", "foo", "a1"},
+	} {
+		out, err := runSkopeo(append([]string{"generate-sigstore-key"}, args...)...)
+		assertTestFailed(t, out, err, "Usage")
+	}
+
+	// One of the destination files already exists
+	outputSuffixes := []string{".pub", ".private"}
+	for _, suffix := range outputSuffixes {
+		dir := t.TempDir()
+		prefix := filepath.Join(dir, "prefix")
+		err := os.WriteFile(prefix+suffix, []byte{}, 0600)
+		require.NoError(t, err)
+		out, err := runSkopeo("generate-sigstore-key",
+			"--output-prefix", prefix, "--passphrase-file", "/dev/null",
+		)
+		assertTestFailed(t, out, err, "Refusing to overwrite")
+	}
+
+	// One of the destinations is inaccessible (simulate by a symlink that tries to
+	// traverse a non-directory)
+	for _, suffix := range outputSuffixes {
+		dir := t.TempDir()
+		nonDirectory := filepath.Join(dir, "nondirectory")
+		err := os.WriteFile(nonDirectory, []byte{}, 0600)
+		require.NoError(t, err)
+		prefix := filepath.Join(dir, "prefix")
+		err = os.Symlink(filepath.Join(nonDirectory, "unaccessible"), prefix+suffix)
+		require.NoError(t, err)
+		out, err := runSkopeo("generate-sigstore-key",
+			"--output-prefix", prefix, "--passphrase-file", "/dev/null",
+		)
+		assertTestFailed(t, out, err, prefix+suffix) // + an OS-specific error message
+	}
+	destDir := t.TempDir()
+	// Error reading passphrase
+	out, err := runSkopeo("generate-sigstore-key",
+		"--output-prefix", filepath.Join(destDir, "prefix"),
+		"--passphrase-file", filepath.Join(destDir, "this-does-not-exist"),
+	)
+	assertTestFailed(t, out, err, "this-does-not-exist")
+
+	// (The interactive passphrase prompting is not yet tested)
+
+	// Error writing outputs is untested: when unit tests run as root, we can’t use permissions on a directory to cause write failures,
+	// with the --output-prefix mechanism, and refusing to even start writing to pre-exisiting files, directories are the only mechanism
+	// we have to trigger a write failure.
+
+	// Success
+	// Just a smoke-test, useability of the keys is tested in the generate implementation.
+	dir := t.TempDir()
+	prefix := filepath.Join(dir, "prefix")
+	passphraseFile := filepath.Join(dir, "passphrase")
+	err = os.WriteFile(passphraseFile, []byte("some passphrase"), 0600)
+	require.NoError(t, err)
+	out, err = runSkopeo("generate-sigstore-key",
+		"--output-prefix", prefix, "--passphrase-file", passphraseFile,
+	)
+	assert.NoError(t, err)
+	for _, suffix := range outputSuffixes {
+		assert.Contains(t, out, prefix+suffix)
+	}
+
+}
diff --git a/cmd/skopeo/main.go b/cmd/skopeo/main.go
index 3f8a9621ec..434fee400b 100644
--- a/cmd/skopeo/main.go
+++ b/cmd/skopeo/main.go
@@ -98,6 +98,7 @@ func createApp() (*cobra.Command, *globalOptions) {
 	rootCommand.AddCommand(
 		copyCmd(&opts),
 		deleteCmd(&opts),
+		generateSigstoreKeyCmd(),
 		inspectCmd(&opts),
 		layersCmd(&opts),
 		loginCmd(&opts),
diff --git a/docs/skopeo-generate-sigstore-key.1.md b/docs/skopeo-generate-sigstore-key.1.md
new file mode 100644
index 0000000000..8cf40f23e7
--- /dev/null
+++ b/docs/skopeo-generate-sigstore-key.1.md
@@ -0,0 +1,47 @@
+% skopeo-generate-sigstore-key(1)
+
+## NAME
+skopeo\-generate-sigstore-key - Generate a sigstore public/private key pair.
+
+## SYNOPSIS
+**skopeo generate-sigstore-key** [*options*] **--output-prefix** _prefix_
+
+## DESCRIPTION
+
+Generates a public/private key pair suitable for creating sigstore image signatures.
+The private key is encrypted with a passphrase;
+if one is not provided using an option, this command prompts for it interactively.
+
+The private key is written to _prefix_**.private** .
+The private key is written to _prefix_**.pub** .
+
+## OPTIONS
+
+**--help**, **-h**
+
+Print usage statement
+
+**--output-prefix** _prefix_
+
+Mandatory.
+Path prefix for the output keys (_prefix_**.private** and _prefix_**.pub**).
+
+**--passphrase-file** _path_
+
+The passphare to use to encrypt the private key.
+Only the first line will be read.
+A passphrase stored in a file is of questionable security if other users can read this file.
+Do not use this option if at all avoidable.
+
+## EXAMPLES
+
+```sh
+$ skopeo generate-sigstore-key --output-prefix mykey
+```
+
+# SEE ALSO
+skopeo(1), skopeo-copy(1), containers-policy.json(5)
+
+## AUTHORS
+
+Miloslav Trmač <mitr@redhat.com>
diff --git a/docs/skopeo.1.md b/docs/skopeo.1.md
index 4421a4764f..c10a00e994 100644
--- a/docs/skopeo.1.md
+++ b/docs/skopeo.1.md
@@ -101,6 +101,7 @@ Print the version number
 | ----------------------------------------- | ------------------------------------------------------------------------------ |
 | [skopeo-copy(1)](skopeo-copy.1.md)        | Copy an image (manifest, filesystem layers, signatures) from one location to another. |
 | [skopeo-delete(1)](skopeo-delete.1.md)    | Mark the _image-name_ for later deletion by the registry's garbage collector.  |
+| [skopeo-generate-sigstore-key(1)](skopeo-generate-sigstore-key.1.md)    | Generate a sigstore public/private key pair.  |
 | [skopeo-inspect(1)](skopeo-inspect.1.md)  | Return low-level information about _image-name_ in a registry.                 |
 | [skopeo-list-tags(1)](skopeo-list-tags.1.md)  | List image names in a transport-specific collection of images.|
 | [skopeo-login(1)](skopeo-login.1.md)  | Login to a container registry. |
diff --git a/go.mod b/go.mod
index 0b8cac5916..7dc906c211 100644
--- a/go.mod
+++ b/go.mod
@@ -4,7 +4,7 @@ go 1.17
 
 require (
 	github.com/containers/common v0.50.1
-	github.com/containers/image/v5 v5.23.1-0.20230113185223-cf9ccfb4d9b1
+	github.com/containers/image/v5 v5.23.1-0.20230123151557-ed23a0036192
 	github.com/containers/ocicrypt v1.1.7
 	github.com/containers/storage v1.45.3
 	github.com/docker/distribution v2.8.1+incompatible
@@ -30,16 +30,18 @@ require (
 	github.com/asaskevich/govalidator v0.0.0-20210307081110-f21760c49a8d // indirect
 	github.com/containerd/cgroups v1.0.4 // indirect
 	github.com/containerd/stargz-snapshotter/estargz v0.13.0 // indirect
-	github.com/containers/libtrust v0.0.0-20200511145503-9c3a6c22cd9a // indirect
-	github.com/coreos/go-oidc/v3 v3.4.0 // indirect
+	github.com/containers/libtrust v0.0.0-20230121012942-c1716e8a8d01 // indirect
+	github.com/coreos/go-oidc/v3 v3.5.0 // indirect
+	github.com/cyberphone/json-canonicalization v0.0.0-20220623050100-57a0ce2678a7 // indirect
 	github.com/cyphar/filepath-securejoin v0.2.3 // indirect
 	github.com/davecgh/go-spew v1.1.1 // indirect
-	github.com/docker/docker v20.10.22+incompatible // indirect
+	github.com/docker/docker v20.10.23+incompatible // indirect
 	github.com/docker/docker-credential-helpers v0.7.0 // indirect
 	github.com/docker/go-connections v0.4.0 // indirect
 	github.com/docker/go-units v0.5.0 // indirect
 	github.com/dsnet/compress v0.0.2-0.20210315054119-f66993602bf5 // indirect
 	github.com/ghodss/yaml v1.0.0 // indirect
+	github.com/go-jose/go-jose/v3 v3.0.0 // indirect
 	github.com/go-openapi/analysis v0.21.4 // indirect
 	github.com/go-openapi/errors v0.20.3 // indirect
 	github.com/go-openapi/jsonpointer v0.19.5 // indirect
@@ -69,7 +71,7 @@ require (
 	github.com/inconshreveable/mousetrap v1.0.1 // indirect
 	github.com/josharian/intern v1.0.0 // indirect
 	github.com/json-iterator/go v1.1.12 // indirect
-	github.com/klauspost/compress v1.15.14 // indirect
+	github.com/klauspost/compress v1.15.15 // indirect
 	github.com/klauspost/pgzip v1.2.6-0.20220930104621-17e8dac29df8 // indirect
 	github.com/kr/pretty v0.3.0 // indirect
 	github.com/kr/text v0.2.0 // indirect
@@ -99,7 +101,7 @@ require (
 	github.com/segmentio/ksuid v1.0.4 // indirect
 	github.com/sigstore/fulcio v1.0.0 // indirect
 	github.com/sigstore/rekor v1.0.1 // indirect
-	github.com/sigstore/sigstore v1.5.0 // indirect
+	github.com/sigstore/sigstore v1.5.1 // indirect
 	github.com/skratchdot/open-golang v0.0.0-20200116055534-eef842397966 // indirect
 	github.com/stefanberger/go-pkcs11uri v0.0.0-20201008174630-78d3cae3a980 // indirect
 	github.com/sylabs/sif/v2 v2.9.0 // indirect
@@ -125,7 +127,7 @@ require (
 	golang.org/x/text v0.6.0 // indirect
 	golang.org/x/tools v0.4.0 // indirect
 	google.golang.org/appengine v1.6.7 // indirect
-	google.golang.org/genproto v0.0.0-20221207170731-23e4bf6bdc37 // indirect
+	google.golang.org/genproto v0.0.0-20221227171554-f9683d7f8bef // indirect
 	google.golang.org/grpc v1.51.0 // indirect
 	google.golang.org/protobuf v1.28.1 // indirect
 	gopkg.in/square/go-jose.v2 v2.6.0 // indirect
diff --git a/go.sum b/go.sum
index e7ae0a6d9f..3decf6fbbe 100644
--- a/go.sum
+++ b/go.sum
@@ -44,6 +44,7 @@ cloud.google.com/go v0.102.1/go.mod h1:XZ77E9qnTEnrgEOvr4xzfdX5TRo7fB4T2F4O6+34h
 cloud.google.com/go v0.103.0/go.mod h1:vwLx1nqLrzLX/fpwSMOXmFIqBOyHsvHbnAdbGSJ+mKk=
 cloud.google.com/go v0.104.0/go.mod h1:OO6xxXdJyvuJPcEPBLN9BJPD+jep5G1+2U5B5gkRYtA=
 cloud.google.com/go v0.105.0/go.mod h1:PrLgOJNe5nfE9UMxKxgXj4mD3voiP+YQ6gdt6KMFOKM=
+cloud.google.com/go v0.107.0/go.mod h1:wpc2eNrD7hXUTy8EKS10jkxpZBjASrORK7goS+3YX2I=
 cloud.google.com/go/accessapproval v1.4.0/go.mod h1:zybIuC3KpDOvotz59lFe5qxRZx6C75OtwbisN56xYB4=
 cloud.google.com/go/accessapproval v1.5.0/go.mod h1:HFy3tuiGvMdcd/u+Cu5b9NkO1pEICJ46IR82PoUdplw=
 cloud.google.com/go/accesscontextmanager v1.3.0/go.mod h1:TgCBehyr5gNMz7ZaH9xubp+CE8dkrszb4oK9CWyvD4o=
@@ -125,10 +126,11 @@ cloud.google.com/go/compute v1.10.0/go.mod h1:ER5CLbMxl90o2jtNbGSbtfOpQKR0t15FOt
 cloud.google.com/go/compute v1.12.0/go.mod h1:e8yNOBcBONZU1vJKCvCoDw/4JQsA0dpM4x/6PIIOocU=
 cloud.google.com/go/compute v1.12.1/go.mod h1:e8yNOBcBONZU1vJKCvCoDw/4JQsA0dpM4x/6PIIOocU=
 cloud.google.com/go/compute v1.13.0/go.mod h1:5aPTS0cUNMIc1CE546K+Th6weJUNQErARyZtRXDJ8GE=
+cloud.google.com/go/compute v1.14.0/go.mod h1:YfLtxrj9sU4Yxv+sXzZkyPjEyPBZfXHUvjxega5vAdo=
 cloud.google.com/go/compute/metadata v0.1.0/go.mod h1:Z1VN+bulIf6bt4P/C37K4DyZYZEXYonfTBHHFPO/4UU=
 cloud.google.com/go/compute/metadata v0.2.0/go.mod h1:zFmK7XCadkQkj6TtorcaGlCW1hT1fIilQDwofLpJ20k=
 cloud.google.com/go/compute/metadata v0.2.1/go.mod h1:jgHgmJd2RKBGzXqF5LR2EZMGxBkeanZ9wwa75XHJgOM=
-cloud.google.com/go/compute/metadata v0.2.2/go.mod h1:jgHgmJd2RKBGzXqF5LR2EZMGxBkeanZ9wwa75XHJgOM=
+cloud.google.com/go/compute/metadata v0.2.3/go.mod h1:VAV5nSsACxMJvgaAuX6Pk2AawlZn8kiOGuCv6gTkwuA=
 cloud.google.com/go/contactcenterinsights v1.3.0/go.mod h1:Eu2oemoePuEFc/xKFPjbTuPSj0fYJcPls9TFlPNnHHY=
 cloud.google.com/go/contactcenterinsights v1.4.0/go.mod h1:L2YzkGbPsv+vMQMCADxJoT9YiTTnSEd6fEvCeHTYVck=
 cloud.google.com/go/container v1.6.0/go.mod h1:Xazp7GjJSeUYo688S+6J5V+n/t+G5sKBTFkKNudGRxg=
@@ -228,7 +230,7 @@ cloud.google.com/go/kms v1.1.0/go.mod h1:WdbppnCDMDpOvoYBMn1+gNmOeEoZYqAv+HeuKAR
 cloud.google.com/go/kms v1.4.0/go.mod h1:fajBHndQ+6ubNw6Ss2sSd+SWvjL26RNo/dr7uxsnnOA=
 cloud.google.com/go/kms v1.5.0/go.mod h1:QJS2YY0eJGBg3mnDfuaCyLauWwBJiHRboYxJ++1xJNg=
 cloud.google.com/go/kms v1.6.0/go.mod h1:Jjy850yySiasBUDi6KFUwUv2n1+o7QZFyuUJg6OgjA0=
-cloud.google.com/go/kms v1.7.0/go.mod h1:k2UdVoNIHLJi/Rnng6dN0vlq7lS3jHSDiZasft+gmYE=
+cloud.google.com/go/kms v1.8.0/go.mod h1:4xFEhYFqvW+4VMELtZyxomGSYtSQKzM178ylFW4jMAg=
 cloud.google.com/go/language v1.4.0/go.mod h1:F9dRpNFQmJbkaop6g0JhSBXCNlO90e1KWx5iDdxbWic=
 cloud.google.com/go/language v1.6.0/go.mod h1:6dJ8t3B+lUYfStgls25GusK04NLh3eDLQnWM3mdEbhI=
 cloud.google.com/go/language v1.7.0/go.mod h1:DJ6dYN/W+SQOjF8e1hLQXMF21AkH2w9wiPzPCJa2MIE=
@@ -445,6 +447,7 @@ github.com/Azure/azure-sdk-for-go v59.3.0+incompatible/go.mod h1:9XXNKU+eRnpl9mo
 github.com/Azure/azure-sdk-for-go v65.0.0+incompatible/go.mod h1:9XXNKU+eRnpl9moKnB4QOLf1HestfXbmab5FXxiDBjc=
 github.com/Azure/azure-sdk-for-go v66.0.0+incompatible/go.mod h1:9XXNKU+eRnpl9moKnB4QOLf1HestfXbmab5FXxiDBjc=
 github.com/Azure/azure-sdk-for-go v67.1.0+incompatible/go.mod h1:9XXNKU+eRnpl9moKnB4QOLf1HestfXbmab5FXxiDBjc=
+github.com/Azure/azure-sdk-for-go v67.3.0+incompatible/go.mod h1:9XXNKU+eRnpl9moKnB4QOLf1HestfXbmab5FXxiDBjc=
 github.com/Azure/azure-service-bus-go v0.9.1/go.mod h1:yzBx6/BUGfjfeqbRZny9AQIbIe3AcV9WZbAdpkoXOa0=
 github.com/Azure/azure-service-bus-go v0.11.5/go.mod h1:MI6ge2CuQWBVq+ly456MY7XqNLJip5LO1iSFodbNLbU=
 github.com/Azure/azure-storage-blob-go v0.8.0/go.mod h1:lPI3aLPpuLTeUwh1sViKXFxwl2B6teiRqI0deQUvsw0=
@@ -624,7 +627,7 @@ github.com/aws/aws-sdk-go v1.44.102/go.mod h1:y4AeaBuwd2Lk+GepC1E9v0qOiTws0MIWAX
 github.com/aws/aws-sdk-go v1.44.111/go.mod h1:y4AeaBuwd2Lk+GepC1E9v0qOiTws0MIWAX4oIKwKHZo=
 github.com/aws/aws-sdk-go v1.44.114/go.mod h1:y4AeaBuwd2Lk+GepC1E9v0qOiTws0MIWAX4oIKwKHZo=
 github.com/aws/aws-sdk-go v1.44.144/go.mod h1:aVsgQcEevwlmQ7qHE9I3h+dtQgpqhFB+i8Phjh7fkwI=
-github.com/aws/aws-sdk-go v1.44.155/go.mod h1:aVsgQcEevwlmQ7qHE9I3h+dtQgpqhFB+i8Phjh7fkwI=
+github.com/aws/aws-sdk-go v1.44.180/go.mod h1:aVsgQcEevwlmQ7qHE9I3h+dtQgpqhFB+i8Phjh7fkwI=
 github.com/aws/aws-sdk-go-v2 v0.18.0/go.mod h1:JWVYvqSMppoMJC0x5wdwiImzgXTI9FuZwxzkQq9wy+g=
 github.com/aws/aws-sdk-go-v2 v1.11.0/go.mod h1:SQfA+m2ltnu1cA0soUkj4dRSsmITiVQUJvBIZjzfPyQ=
 github.com/aws/aws-sdk-go-v2 v1.16.7/go.mod h1:6CpKuLXg2w7If3ABZCl/qZ6rEgwtjZTn4eAf4RcEyuw=
@@ -632,7 +635,7 @@ github.com/aws/aws-sdk-go-v2 v1.16.11/go.mod h1:WTACcleLz6VZTp7fak4EO5b9Q4foxbn+
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@@ -640,18 +643,18 @@ github.com/aws/aws-sdk-go-v2/config v1.17.1/go.mod h1:uOxDHjBemNTF2Zos+fgG0NNfE8
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@@ -970,6 +973,8 @@ github.com/creack/pty v1.1.7/go.mod h1:lj5s0c3V2DBrqTV7llrYr5NG6My20zk30Fl46Y7Do
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+github.com/cyberphone/json-canonicalization v0.0.0-20220623050100-57a0ce2678a7/go.mod h1:uzvlm1mxhHkdfqitSA92i7Se+S9ksOn3a3qmv/kyOCw=
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@@ -1010,8 +1015,8 @@ github.com/docker/docker v1.4.2-0.20190924003213-a8608b5b67c7/go.mod h1:eEKB0N0r
 github.com/docker/docker v20.10.17+incompatible/go.mod h1:eEKB0N0r5NX/I1kEveEz05bcu8tLC/8azJZsviup8Sk=
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-github.com/docker/docker v20.10.22+incompatible h1:6jX4yB+NtcbldT90k7vBSaWJDB3i+zkVJT9BEK8kQkk=
-github.com/docker/docker v20.10.22+incompatible/go.mod h1:eEKB0N0r5NX/I1kEveEz05bcu8tLC/8azJZsviup8Sk=
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+github.com/docker/docker v20.10.23+incompatible/go.mod h1:eEKB0N0r5NX/I1kEveEz05bcu8tLC/8azJZsviup8Sk=
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@@ -1026,7 +1031,6 @@ github.com/docker/go-units v0.4.0/go.mod h1:fgPhTUdO+D/Jk86RDLlptpiXQzgHJF7gydDD
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-github.com/docker/libtrust v0.0.0-20160708172513-aabc10ec26b7 h1:UhxFibDNY/bfvqU5CAUmr9zpesgbU6SWc8/B4mflAE4=
 github.com/docker/libtrust v0.0.0-20160708172513-aabc10ec26b7/go.mod h1:cyGadeNEkKy96OOhEzfZl+yxihPEzKnqJwvfuSUqbZE=
 github.com/docker/spdystream v0.0.0-20160310174837-449fdfce4d96/go.mod h1:Qh8CwZgvJUkLughtfhJv5dyTYa91l1fOUCrgjqmcifM=
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@@ -1129,6 +1133,8 @@ github.com/go-gl/glfw/v3.3/glfw v0.0.0-20191125211704-12ad95a8df72/go.mod h1:tQ2
 github.com/go-gl/glfw/v3.3/glfw v0.0.0-20200222043503-6f7a984d4dc4/go.mod h1:tQ2UAYgL5IevRw8kRxooKSPJfGvJ9fJQFa0TUsXzTg8=
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+github.com/go-jose/go-jose/v3 v3.0.0 h1:s6rrhirfEP/CGIoc6p+PZAeogN2SxKav6Wp7+dyMWVo=
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@@ -1216,8 +1222,8 @@ github.com/go-redis/redis/v8 v8.11.5/go.mod h1:gREzHqY1hg6oD9ngVRbLStwAWKhA0FEgq
 github.com/go-rod/rod v0.109.3/go.mod h1:GZDtmEs6RpF6kBRYpGCZXxXlKNneKVPiKOjaMbmVVjE=
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-github.com/go-rod/rod v0.112.2 h1:dwauKYC/H2em8/BcGk3gC0LTzZHf5MIDKf2DVM4z9gU=
-github.com/go-rod/rod v0.112.2/go.mod h1:ElViL9ABbcshNQw93+11FrYRH92RRhMKleuILo6+5V0=
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@@ -1226,8 +1232,9 @@ github.com/go-stack/stack v1.8.0/go.mod h1:v0f6uXyyMGvRgIKkXu+yp6POWl0qKG85gN/me
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@@ -1492,6 +1499,7 @@ github.com/google/wire v0.5.0/go.mod h1:ngWDr9Qvq3yZA10YrxfyGELY/AFWGVpy9c1LTRi1
 github.com/googleapis/enterprise-certificate-proxy v0.0.0-20220520183353-fd19c99a87aa/go.mod h1:17drOmN3MwGY7t0e+Ei9b45FFGA3fBs3x36SsCg1hq8=
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@@ -1815,8 +1823,9 @@ github.com/klauspost/compress v1.15.8/go.mod h1:PhcZ0MbTNciWF3rruxRgKxI5NkcHHrHU
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-github.com/klauspost/compress v1.15.14 h1:i7WCKDToww0wA+9qrUZ1xOjp218vfFo3nTU6UHp+gOc=
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@@ -2359,8 +2368,8 @@ github.com/sigstore/rekor v1.0.1/go.mod h1:ecTKdZWGWqE1pl3U1m1JebQJLU/hSjD9vYHOm
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-github.com/sigstore/sigstore v1.5.0 h1:NqstQ6SwwhQsp6Ll0wgk/d9g5MlfmEppo14aquUjJ/8=
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@@ -2763,6 +2772,7 @@ golang.org/x/crypto v0.0.0-20190605123033-f99c8df09eb5/go.mod h1:yigFU9vqHzYiE8U
 golang.org/x/crypto v0.0.0-20190611184440-5c40567a22f8/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
 golang.org/x/crypto v0.0.0-20190701094942-4def268fd1a4/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
 golang.org/x/crypto v0.0.0-20190820162420-60c769a6c586/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
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 golang.org/x/crypto v0.0.0-20190923035154-9ee001bba392/go.mod h1:/lpIB1dKB+9EgE3H3cr1v9wB50oz8l4C4h62xy7jSTY=
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 golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
@@ -2803,7 +2813,6 @@ golang.org/x/crypto v0.0.0-20220919173607-35f4265a4bc0/go.mod h1:IxCIyHEi3zRg3s0
 golang.org/x/crypto v0.0.0-20220926161630-eccd6366d1be/go.mod h1:IxCIyHEi3zRg3s0A5j5BB6A9Jmi73HwBIUl50j+osU4=
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-golang.org/x/crypto v0.4.0/go.mod h1:3quD/ATkf6oY+rnes5c3ExXTbLc8mueNue5/DoinL80=
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@@ -2948,6 +2957,7 @@ golang.org/x/net v0.0.0-20221014081412-f15817d10f9b/go.mod h1:YDH+HFinaLZZlnHAfS
 golang.org/x/net v0.1.0/go.mod h1:Cx3nUiGt4eDBEyega/BKRp+/AlGL8hYe7U9odMt2Cco=
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+golang.org/x/net v0.4.0/go.mod h1:MBQ8lrhLObU/6UmLb4fmbmk5OcyYmqtbGd/9yIeKjEE=
 golang.org/x/net v0.5.0 h1:GyT4nK/YDHSqa1c4753ouYCDajOYKTja9Xb/OHtgvSw=
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 golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
@@ -3429,7 +3439,7 @@ google.golang.org/api v0.99.0/go.mod h1:1YOf74vkVndF7pG6hIHuINsM7eWwpVTAfNMNiL91
 google.golang.org/api v0.100.0/go.mod h1:ZE3Z2+ZOr87Rx7dqFsdRQkRBk36kDtp/h+QpHbB7a70=
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 google.golang.org/api v0.103.0/go.mod h1:hGtW6nK1AC+d9si/UBhw8Xli+QMOf6xyNAyJw4qU9w0=
-google.golang.org/api v0.104.0/go.mod h1:JCspTXJbBxa5ySXw4UgUqVer7DfVxbvc/CTUFqAED5U=
+google.golang.org/api v0.107.0/go.mod h1:2Ts0XTHNVWxypznxWOYUeI4g3WdP9Pk2Qk58+a/O9MY=
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@@ -3591,9 +3601,9 @@ google.golang.org/genproto v0.0.0-20221114212237-e4508ebdbee1/go.mod h1:rZS5c/ZV
 google.golang.org/genproto v0.0.0-20221117204609-8f9c96812029/go.mod h1:rZS5c/ZVYMaOGBfO68GWtjOw/eLaZM1X6iVtgjZ+EWg=
 google.golang.org/genproto v0.0.0-20221118155620-16455021b5e6/go.mod h1:rZS5c/ZVYMaOGBfO68GWtjOw/eLaZM1X6iVtgjZ+EWg=
 google.golang.org/genproto v0.0.0-20221201164419-0e50fba7f41c/go.mod h1:rZS5c/ZVYMaOGBfO68GWtjOw/eLaZM1X6iVtgjZ+EWg=
-google.golang.org/genproto v0.0.0-20221206210731-b1a01be3a5f6/go.mod h1:1dOng4TWOomJrDGhpXjfCD35wQC6jnC7HpRmOFRqEV0=
-google.golang.org/genproto v0.0.0-20221207170731-23e4bf6bdc37 h1:jmIfw8+gSvXcZSgaFAGyInDXeWzUhvYH57G/5GKMn70=
-google.golang.org/genproto v0.0.0-20221207170731-23e4bf6bdc37/go.mod h1:RGgjbofJ8xD9Sq1VVhDM1Vok1vRONV+rg+CjzG4SZKM=
+google.golang.org/genproto v0.0.0-20221202195650-67e5cbc046fd/go.mod h1:cTsE614GARnxrLsqKREzmNYJACSWWpAWdNMwnD7c2BE=
+google.golang.org/genproto v0.0.0-20221227171554-f9683d7f8bef h1:uQ2vjV/sHTsWSqdKeLqmwitzgvjMl7o4IdtHwUDXSJY=
+google.golang.org/genproto v0.0.0-20221227171554-f9683d7f8bef/go.mod h1:RGgjbofJ8xD9Sq1VVhDM1Vok1vRONV+rg+CjzG4SZKM=
 google.golang.org/grpc v0.0.0-20160317175043-d3ddb4469d5a/go.mod h1:yo6s7OP7yaDglbqo1J04qKzAhqBH6lvTonzMVmEdcZw=
 google.golang.org/grpc v1.8.0/go.mod h1:yo6s7OP7yaDglbqo1J04qKzAhqBH6lvTonzMVmEdcZw=
 google.golang.org/grpc v1.17.0/go.mod h1:6QZJwpn2B+Zp71q/5VxRsJ6NXXVCE5NRUHRo+f3cWCs=
diff --git a/vendor/github.com/containers/image/v5/docker/docker_image_src.go b/vendor/github.com/containers/image/v5/docker/docker_image_src.go
index d8763207d7..373fb259c1 100644
--- a/vendor/github.com/containers/image/v5/docker/docker_image_src.go
+++ b/vendor/github.com/containers/image/v5/docker/docker_image_src.go
@@ -10,7 +10,6 @@ import (
 	"net/http"
 	"net/url"
 	"os"
-	"regexp"
 	"strings"
 	"sync"
 
@@ -24,6 +23,7 @@ import (
 	"github.com/containers/image/v5/pkg/blobinfocache/none"
 	"github.com/containers/image/v5/pkg/sysregistriesv2"
 	"github.com/containers/image/v5/types"
+	"github.com/containers/storage/pkg/regexp"
 	digest "github.com/opencontainers/go-digest"
 	"github.com/sirupsen/logrus"
 )
@@ -303,7 +303,7 @@ func handle206Response(streams chan io.ReadCloser, errs chan error, body io.Read
 	}
 }
 
-var multipartByteRangesRe = regexp.MustCompile("multipart/byteranges; boundary=([A-Za-z-0-9:]+)")
+var multipartByteRangesRe = regexp.Delayed("multipart/byteranges; boundary=([A-Za-z-0-9:]+)")
 
 func parseMediaType(contentType string) (string, map[string]string, error) {
 	mediaType, params, err := mime.ParseMediaType(contentType)
diff --git a/vendor/github.com/containers/image/v5/docker/reference/regexp.go b/vendor/github.com/containers/image/v5/docker/reference/regexp.go
index 1829d89b17..bb8c554743 100644
--- a/vendor/github.com/containers/image/v5/docker/reference/regexp.go
+++ b/vendor/github.com/containers/image/v5/docker/reference/regexp.go
@@ -1,6 +1,7 @@
 package reference
 
 import (
+	storageRegexp "github.com/containers/storage/pkg/regexp"
 	"regexp"
 	"strings"
 )
@@ -60,7 +61,7 @@ var (
 	anchoredTag = anchored(tag)
 	// anchoredTagRegexp matches valid tag names, anchored at the start and
 	// end of the matched string.
-	anchoredTagRegexp = re(anchoredTag)
+	anchoredTagRegexp = storageRegexp.Delayed(anchoredTag)
 
 	// DigestRegexp matches valid digests.
 	DigestRegexp = re(digestPat)
@@ -68,7 +69,7 @@ var (
 	anchoredDigest = anchored(digestPat)
 	// anchoredDigestRegexp matches valid digests, anchored at the start and
 	// end of the matched string.
-	anchoredDigestRegexp = re(anchoredDigest)
+	anchoredDigestRegexp = storageRegexp.Delayed(anchoredDigest)
 
 	namePat = expression(
 		optional(domain, literal(`/`)),
@@ -85,7 +86,7 @@ var (
 			optional(repeated(literal(`/`), nameComponent))))
 	// anchoredNameRegexp is used to parse a name value, capturing the
 	// domain and trailing components.
-	anchoredNameRegexp = re(anchoredName)
+	anchoredNameRegexp = storageRegexp.Delayed(anchoredName)
 
 	referencePat = anchored(capture(namePat),
 		optional(literal(":"), capture(tag)),
@@ -108,13 +109,7 @@ var (
 	anchoredIdentifier = anchored(identifier)
 	// anchoredIdentifierRegexp is used to check or match an
 	// identifier value, anchored at start and end of string.
-	anchoredIdentifierRegexp = re(anchoredIdentifier)
-
-	anchoredShortIdentifier = anchored(shortIdentifier)
-	// anchoredShortIdentifierRegexp is used to check if a value
-	// is a possible identifier prefix, anchored at start and end
-	// of string.
-	anchoredShortIdentifierRegexp = re(anchoredShortIdentifier)
+	anchoredIdentifierRegexp = storageRegexp.Delayed(anchoredIdentifier)
 )
 
 // re compiles the string to a regular expression.
diff --git a/vendor/github.com/containers/image/v5/manifest/docker_schema1.go b/vendor/github.com/containers/image/v5/manifest/docker_schema1.go
index 9df9bc6673..8e260c03db 100644
--- a/vendor/github.com/containers/image/v5/manifest/docker_schema1.go
+++ b/vendor/github.com/containers/image/v5/manifest/docker_schema1.go
@@ -4,12 +4,12 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
-	"regexp"
 	"strings"
 	"time"
 
 	"github.com/containers/image/v5/docker/reference"
 	"github.com/containers/image/v5/types"
+	"github.com/containers/storage/pkg/regexp"
 	"github.com/docker/docker/api/types/versions"
 	"github.com/opencontainers/go-digest"
 )
@@ -206,7 +206,7 @@ func (m *Schema1) fixManifestLayers() error {
 	return nil
 }
 
-var validHex = regexp.MustCompile(`^([a-f0-9]{64})$`)
+var validHex = regexp.Delayed(`^([a-f0-9]{64})$`)
 
 func validateV1ID(id string) error {
 	if ok := validHex.MatchString(id); !ok {
@@ -227,6 +227,7 @@ func (m *Schema1) Inspect(_ func(types.BlobInfo) ([]byte, error)) (*types.ImageI
 		Created:       &s1.Created,
 		DockerVersion: s1.DockerVersion,
 		Architecture:  s1.Architecture,
+		Variant:       s1.Variant,
 		Os:            s1.OS,
 		Layers:        layerInfosToStrings(layerInfos),
 		LayersData:    imgInspectLayersFromLayerInfos(layerInfos),
diff --git a/vendor/github.com/containers/image/v5/manifest/oci.go b/vendor/github.com/containers/image/v5/manifest/oci.go
index 0674eb47b8..2c52423d9f 100644
--- a/vendor/github.com/containers/image/v5/manifest/oci.go
+++ b/vendor/github.com/containers/image/v5/manifest/oci.go
@@ -219,6 +219,7 @@ func (m *OCI1) Inspect(configGetter func(types.BlobInfo) ([]byte, error)) (*type
 		DockerVersion: d1.DockerVersion,
 		Labels:        v1.Config.Labels,
 		Architecture:  v1.Architecture,
+		Variant:       v1.Variant,
 		Os:            v1.OS,
 		Layers:        layerInfosToStrings(layerInfos),
 		LayersData:    imgInspectLayersFromLayerInfos(layerInfos),
diff --git a/vendor/github.com/containers/image/v5/openshift/openshift_transport.go b/vendor/github.com/containers/image/v5/openshift/openshift_transport.go
index f7971a48f5..1599039445 100644
--- a/vendor/github.com/containers/image/v5/openshift/openshift_transport.go
+++ b/vendor/github.com/containers/image/v5/openshift/openshift_transport.go
@@ -4,7 +4,6 @@ import (
 	"context"
 	"errors"
 	"fmt"
-	"regexp"
 	"strings"
 
 	"github.com/containers/image/v5/docker/policyconfiguration"
@@ -12,6 +11,7 @@ import (
 	genericImage "github.com/containers/image/v5/internal/image"
 	"github.com/containers/image/v5/transports"
 	"github.com/containers/image/v5/types"
+	"github.com/containers/storage/pkg/regexp"
 )
 
 func init() {
@@ -35,7 +35,7 @@ func (t openshiftTransport) ParseReference(reference string) (types.ImageReferen
 // Note that imageNameRegexp is namespace/stream:tag, this
 // is HOSTNAME/namespace/stream:tag or parent prefixes.
 // Keep this in sync with imageNameRegexp!
-var scopeRegexp = regexp.MustCompile("^[^/]*(/[^:/]*(/[^:/]*(:[^:/]*)?)?)?$")
+var scopeRegexp = regexp.Delayed("^[^/]*(/[^:/]*(/[^:/]*(:[^:/]*)?)?)?$")
 
 // ValidatePolicyConfigurationScope checks that scope is a valid name for a signature.PolicyTransportScopes keys
 // (i.e. a valid PolicyConfigurationIdentity() or PolicyConfigurationNamespaces() return value).
diff --git a/vendor/github.com/containers/image/v5/ostree/ostree_transport.go b/vendor/github.com/containers/image/v5/ostree/ostree_transport.go
index 658d4e9035..14a84414ab 100644
--- a/vendor/github.com/containers/image/v5/ostree/ostree_transport.go
+++ b/vendor/github.com/containers/image/v5/ostree/ostree_transport.go
@@ -10,7 +10,6 @@ import (
 	"fmt"
 	"os"
 	"path/filepath"
-	"regexp"
 	"strings"
 
 	"github.com/containers/image/v5/directory/explicitfilepath"
@@ -18,6 +17,7 @@ import (
 	"github.com/containers/image/v5/internal/image"
 	"github.com/containers/image/v5/transports"
 	"github.com/containers/image/v5/types"
+	"github.com/containers/storage/pkg/regexp"
 )
 
 const defaultOSTreeRepo = "/ostree/repo"
@@ -216,7 +216,7 @@ func (ref ostreeReference) DeleteImage(ctx context.Context, sys *types.SystemCon
 	return errors.New("Deleting images not implemented for ostree: images")
 }
 
-var ostreeRefRegexp = regexp.MustCompile(`^[A-Za-z0-9.-]$`)
+var ostreeRefRegexp = regexp.Delayed(`^[A-Za-z0-9.-]$`)
 
 func encodeOStreeRef(in string) string {
 	var buffer bytes.Buffer
diff --git a/vendor/github.com/containers/image/v5/pkg/sysregistriesv2/system_registries_v2.go b/vendor/github.com/containers/image/v5/pkg/sysregistriesv2/system_registries_v2.go
index 642408399d..463e770280 100644
--- a/vendor/github.com/containers/image/v5/pkg/sysregistriesv2/system_registries_v2.go
+++ b/vendor/github.com/containers/image/v5/pkg/sysregistriesv2/system_registries_v2.go
@@ -6,7 +6,6 @@ import (
 	"os"
 	"path/filepath"
 	"reflect"
-	"regexp"
 	"sort"
 	"strings"
 	"sync"
@@ -15,6 +14,7 @@ import (
 	"github.com/containers/image/v5/docker/reference"
 	"github.com/containers/image/v5/types"
 	"github.com/containers/storage/pkg/homedir"
+	"github.com/containers/storage/pkg/regexp"
 	"github.com/sirupsen/logrus"
 )
 
@@ -384,7 +384,7 @@ func (config *V1RegistriesConf) ConvertToV2() (*V2RegistriesConf, error) {
 }
 
 // anchoredDomainRegexp is an internal implementation detail of postProcess, defining the valid values of elements of UnqualifiedSearchRegistries.
-var anchoredDomainRegexp = regexp.MustCompile("^" + reference.DomainRegexp.String() + "$")
+var anchoredDomainRegexp = regexp.Delayed("^" + reference.DomainRegexp.String() + "$")
 
 // postProcess checks the consistency of all the configuration, looks for conflicts,
 // and normalizes the configuration (e.g., sets the Prefix to Location if not set).
diff --git a/vendor/github.com/containers/image/v5/signature/fulcio_cert.go b/vendor/github.com/containers/image/v5/signature/fulcio_cert.go
new file mode 100644
index 0000000000..2e7f44ce5f
--- /dev/null
+++ b/vendor/github.com/containers/image/v5/signature/fulcio_cert.go
@@ -0,0 +1,174 @@
+package signature
+
+import (
+	"crypto"
+	"crypto/ecdsa"
+	"crypto/x509"
+	"encoding/asn1"
+	"errors"
+	"fmt"
+	"time"
+
+	"github.com/containers/image/v5/signature/internal"
+	"github.com/sigstore/fulcio/pkg/certificate"
+	"github.com/sigstore/sigstore/pkg/cryptoutils"
+)
+
+// fulcioTrustRoot contains policy allow validating Fulcio-issued certificates.
+// Users should call validate() on the policy before using it.
+type fulcioTrustRoot struct {
+	caCertificates *x509.CertPool
+	oidcIssuer     string
+	subjectEmail   string
+}
+
+func (f *fulcioTrustRoot) validate() error {
+	if f.oidcIssuer == "" {
+		return errors.New("Internal inconsistency: Fulcio use set up without OIDC issuer")
+	}
+	if f.subjectEmail == "" {
+		return errors.New("Internal inconsistency: Fulcio use set up without subject email")
+	}
+	return nil
+}
+
+func (f *fulcioTrustRoot) verifyFulcioCertificateAtTime(relevantTime time.Time, untrustedCertificateBytes []byte, untrustedIntermediateChainBytes []byte) (crypto.PublicKey, error) {
+	// == Verify the certificate is correctly signed
+	var untrustedIntermediatePool *x509.CertPool // = nil
+	// untrustedCertificateChainPool.AppendCertsFromPEM does something broadly similar,
+	// but it seems to optimize for memory usage at the cost of larger CPU usage (i.e. to load
+	// the hundreds of trusted CAs). Golang’s TLS code similarly calls individual AddCert
+	// for intermediate certificates.
+	if len(untrustedIntermediateChainBytes) > 0 {
+		untrustedIntermediateChain, err := cryptoutils.UnmarshalCertificatesFromPEM(untrustedIntermediateChainBytes)
+		if err != nil {
+			return nil, internal.NewInvalidSignatureError(fmt.Sprintf("loading certificate chain: %v", err))
+		}
+		untrustedIntermediatePool = x509.NewCertPool()
+		if len(untrustedIntermediateChain) > 1 {
+			for _, untrustedIntermediateCert := range untrustedIntermediateChain[:len(untrustedIntermediateChain)-1] {
+				untrustedIntermediatePool.AddCert(untrustedIntermediateCert)
+			}
+		}
+	}
+
+	untrustedLeafCerts, err := cryptoutils.UnmarshalCertificatesFromPEM(untrustedCertificateBytes)
+	if err != nil {
+		return nil, internal.NewInvalidSignatureError(fmt.Sprintf("parsing leaf certificate: %v", err))
+	}
+	switch len(untrustedLeafCerts) {
+	case 0:
+		return nil, internal.NewInvalidSignatureError("no certificate found in signature certificate data")
+	case 1:
+		break // OK
+	default:
+		return nil, internal.NewInvalidSignatureError("unexpected multiple certificates present in signature certificate data")
+	}
+	untrustedCertificate := untrustedLeafCerts[0]
+
+	// Go rejects Subject Alternative Name that has no DNSNames, EmailAddresses, IPAddresses and URIs;
+	// we match SAN ourselves, so override that.
+	if len(untrustedCertificate.UnhandledCriticalExtensions) > 0 {
+		var remaining []asn1.ObjectIdentifier
+		for _, oid := range untrustedCertificate.UnhandledCriticalExtensions {
+			if !oid.Equal(cryptoutils.SANOID) {
+				remaining = append(remaining, oid)
+			}
+		}
+		untrustedCertificate.UnhandledCriticalExtensions = remaining
+	}
+
+	if _, err := untrustedCertificate.Verify(x509.VerifyOptions{
+		Intermediates: untrustedIntermediatePool,
+		Roots:         f.caCertificates,
+		// NOTE: Cosign uses untrustedCertificate.NotBefore here (i.e. uses _that_ time for intermediate certificate validation),
+		// and validates the leaf certificate against relevantTime manually.
+		// We verify the full certificate chain against relevantTime instead.
+		// Assuming the certificate is fulcio-generated and very short-lived, that should make little difference.
+		CurrentTime: relevantTime,
+		KeyUsages:   []x509.ExtKeyUsage{x509.ExtKeyUsageCodeSigning},
+	}); err != nil {
+		return nil, internal.NewInvalidSignatureError(fmt.Sprintf("veryfing leaf certificate failed: %v", err))
+	}
+
+	// Cosign verifies a SCT of the certificate (either embedded, or even, probably irrelevant, externally-supplied).
+	//
+	// We don’t currently do that.
+	//
+	// At the very least, with Fulcio we require Rekor SETs to prove Rekor contains a log of the signature, and that
+	// already contains the full certificate; so a SCT of the certificate is superfluous (assuming Rekor allowed searching by
+	// certificate subject, which, well…). That argument might go away if we add support for RFC 3161 timestamps instead of Rekor.
+	//
+	// Secondarily, assuming a trusted Fulcio server (which, to be fair, might not be the case for the public one) SCT is not clearly
+	// better than the Fulcio server maintaining an audit log; a SCT can only reveal a misissuance if there is some other authoritative
+	// log of approved Fulcio invocations, and it’s not clear where that would come from, especially human users manually
+	// logging in using OpenID are not going to maintain a record of those actions.
+	//
+	// Also, the SCT does not help reveal _what_ was maliciously signed, nor does it protect against malicous signatures
+	// by correctly-issued certificates.
+	//
+	// So, pragmatically, the ideal design seem to be to only do signatures from a trusted build system (which is, by definition,
+	// the arbiter of desired vs. malicious signatures) that maintains an audit log of performed signature operations; and that seems to
+	// make make the SCT (and all of Rekor apart from the trusted timestamp) unnecessary.
+
+	// == Validate the recorded OIDC issuer
+	gotOIDCIssuer := false
+	var oidcIssuer string
+	// certificate.ParseExtensions doesn’t reject duplicate extensions.
+	// Go 1.19 rejects duplicate extensions universally; but until we can require Go 1.19,
+	// reject duplicates manually. With Go 1.19, we could call certificate.ParseExtensions again.
+	for _, untrustedExt := range untrustedCertificate.Extensions {
+		if untrustedExt.Id.Equal(certificate.OIDIssuer) {
+			if gotOIDCIssuer {
+				// Coverage: This is unreachable in Go ≥1.19, which rejects certificates with duplicate extensions
+				// already in ParseCertificate.
+				return nil, internal.NewInvalidSignatureError("Fulcio certificate has a duplicate OIDC issuer extension")
+			}
+			oidcIssuer = string(untrustedExt.Value)
+			gotOIDCIssuer = true
+		}
+	}
+	if !gotOIDCIssuer {
+		return nil, internal.NewInvalidSignatureError("Fulcio certificate is missing the issuer extension")
+	}
+	if oidcIssuer != f.oidcIssuer {
+		return nil, internal.NewInvalidSignatureError(fmt.Sprintf("Unexpected Fulcio OIDC issuer %q", oidcIssuer))
+	}
+
+	// == Validate the OIDC subject
+	foundEmail := false
+	// TO DO: Use slices.Contains after we update to Go 1.18
+	for _, certEmail := range untrustedCertificate.EmailAddresses {
+		if certEmail == f.subjectEmail {
+			foundEmail = true
+			break
+		}
+	}
+	if !foundEmail {
+		return nil, internal.NewInvalidSignatureError(fmt.Sprintf("Required email %s not found (got %#v)",
+			f.subjectEmail,
+			untrustedCertificate.EmailAddresses))
+	}
+	// FIXME: Match more subject types? Cosign does:
+	// - .DNSNames (can’t be issued by Fulcio)
+	// - .IPAddresses (can’t be issued by Fulcio)
+	// - .URIs (CAN be issued by Fulcio)
+	// - OtherName values in SAN (CAN be issued by Fulcio)
+	// - Various values about GitHub workflows (CAN be issued by Fulcio)
+	// What does it… mean to get an OAuth2 identity for an IP address?
+	// FIXME: How far into Turing-completeness for the issuer/subject do we need to get? Simultaneously accepted alternatives, for
+	// issuers and/or subjects and/or combinations? Regexps? More?
+
+	return untrustedCertificate.PublicKey, nil
+}
+
+func verifyRekorFulcio(rekorPublicKey *ecdsa.PublicKey, fulcioTrustRoot *fulcioTrustRoot, untrustedRekorSET []byte,
+	untrustedCertificateBytes []byte, untrustedIntermediateChainBytes []byte, untrustedBase64Signature string,
+	untrustedPayloadBytes []byte) (crypto.PublicKey, error) {
+	rekorSETTime, err := internal.VerifyRekorSET(rekorPublicKey, untrustedRekorSET, untrustedCertificateBytes,
+		untrustedBase64Signature, untrustedPayloadBytes)
+	if err != nil {
+		return nil, err
+	}
+	return fulcioTrustRoot.verifyFulcioCertificateAtTime(rekorSETTime, untrustedCertificateBytes, untrustedIntermediateChainBytes)
+}
diff --git a/vendor/github.com/containers/image/v5/signature/internal/rekor_set.go b/vendor/github.com/containers/image/v5/signature/internal/rekor_set.go
index 6824a7336a..27c2c7e637 100644
--- a/vendor/github.com/containers/image/v5/signature/internal/rekor_set.go
+++ b/vendor/github.com/containers/image/v5/signature/internal/rekor_set.go
@@ -1,7 +1,18 @@
 package internal
 
 import (
+	"bytes"
+	"crypto/ecdsa"
+	"crypto/sha256"
+	"encoding/base64"
+	"encoding/hex"
 	"encoding/json"
+	"encoding/pem"
+	"fmt"
+	"time"
+
+	"github.com/cyberphone/json-canonicalization/go/src/webpki.org/jsoncanonicalizer"
+	"github.com/sigstore/rekor/pkg/generated/models"
 )
 
 // This is the github.com/sigstore/rekor/pkg/generated/models.Hashedrekord.APIVersion for github.com/sigstore/rekor/pkg/generated/models.HashedrekordV001Schema.
@@ -96,3 +107,131 @@ func (p UntrustedRekorPayload) MarshalJSON() ([]byte, error) {
 		"logID":          p.LogID,
 	})
 }
+
+// VerifyRekorSET verifies that unverifiedRekorSET is correctly signed by publicKey and matches the rest of the data.
+// Returns bundle upload time on success.
+func VerifyRekorSET(publicKey *ecdsa.PublicKey, unverifiedRekorSET []byte, unverifiedKeyOrCertBytes []byte, unverifiedBase64Signature string, unverifiedPayloadBytes []byte) (time.Time, error) {
+	// FIXME: Should the publicKey parameter hard-code ecdsa?
+
+	// == Parse SET bytes
+	var untrustedSET UntrustedRekorSET
+	// Sadly. we need to parse and transform untrusted data before verifying a cryptographic signature...
+	if err := json.Unmarshal(unverifiedRekorSET, &untrustedSET); err != nil {
+		return time.Time{}, NewInvalidSignatureError(err.Error())
+	}
+	// == Verify SET signature
+	// Cosign unmarshals and re-marshals UntrustedPayload; that seems unnecessary,
+	// assuming jsoncanonicalizer is designed to operate on untrusted data.
+	untrustedSETPayloadCanonicalBytes, err := jsoncanonicalizer.Transform(untrustedSET.UntrustedPayload)
+	if err != nil {
+		return time.Time{}, NewInvalidSignatureError(fmt.Sprintf("canonicalizing Rekor SET JSON: %v", err))
+	}
+	untrustedSETPayloadHash := sha256.Sum256(untrustedSETPayloadCanonicalBytes)
+	if !ecdsa.VerifyASN1(publicKey, untrustedSETPayloadHash[:], untrustedSET.UntrustedSignedEntryTimestamp) {
+		return time.Time{}, NewInvalidSignatureError("cryptographic signature verification of Rekor SET failed")
+	}
+
+	// == Parse SET payload
+	// Parse the cryptographically-verified canonicalized variant, NOT the originally-delivered representation,
+	// to decrease risk of exploiting the JSON parser. Note that if there were an arbitrary execution vulnerability, the attacker
+	// could have exploited the parsing of unverifiedRekorSET above already; so this, at best, ensures more consistent processing
+	// of the SET payload.
+	var rekorPayload UntrustedRekorPayload
+	if err := json.Unmarshal(untrustedSETPayloadCanonicalBytes, &rekorPayload); err != nil {
+		return time.Time{}, NewInvalidSignatureError(fmt.Sprintf("parsing Rekor SET payload: %v", err.Error()))
+	}
+	// FIXME: Use a different decoder implementation? The Swagger-generated code is kinda ridiculous, with the need to re-marshal
+	// hashedRekor.Spec and so on.
+	// Especially if we anticipate needing to decode different data formats…
+	// That would also allow being much more strict about JSON.
+	//
+	// Alternatively, rely on the existing .Validate() methods instead of manually checking for nil all over the place.
+	var hashedRekord models.Hashedrekord
+	if err := json.Unmarshal(rekorPayload.Body, &hashedRekord); err != nil {
+		return time.Time{}, NewInvalidSignatureError(fmt.Sprintf("decoding the body of a Rekor SET payload: %v", err))
+	}
+	// The decode of models.HashedRekord validates the "kind": "hashedrecord" field, which is otherwise invisible to us.
+	if hashedRekord.APIVersion == nil {
+		return time.Time{}, NewInvalidSignatureError("missing Rekor SET Payload API version")
+	}
+	if *hashedRekord.APIVersion != HashedRekordV001APIVersion {
+		return time.Time{}, NewInvalidSignatureError(fmt.Sprintf("unsupported Rekor SET Payload hashedrekord version %#v", hashedRekord.APIVersion))
+	}
+	hashedRekordV001Bytes, err := json.Marshal(hashedRekord.Spec)
+	if err != nil {
+		// Coverage: hashedRekord.Spec is an interface{} that was just unmarshaled,
+		// so this should never fail.
+		return time.Time{}, NewInvalidSignatureError(fmt.Sprintf("re-creating hashedrekord spec: %v", err))
+	}
+	var hashedRekordV001 models.HashedrekordV001Schema
+	if err := json.Unmarshal(hashedRekordV001Bytes, &hashedRekordV001); err != nil {
+		return time.Time{}, NewInvalidSignatureError(fmt.Sprintf("decoding hashedrekod spec: %v", err))
+	}
+
+	// == Match unverifiedKeyOrCertBytes
+	if hashedRekordV001.Signature == nil {
+		return time.Time{}, NewInvalidSignatureError(`Missing "signature" field in hashedrekord`)
+	}
+	if hashedRekordV001.Signature.PublicKey == nil {
+		return time.Time{}, NewInvalidSignatureError(`Missing "signature.publicKey" field in hashedrekord`)
+
+	}
+	rekorKeyOrCertPEM, rest := pem.Decode(hashedRekordV001.Signature.PublicKey.Content)
+	if rekorKeyOrCertPEM == nil {
+		return time.Time{}, NewInvalidSignatureError("publicKey in Rekor SET is not in PEM format")
+	}
+	if len(rest) != 0 {
+		return time.Time{}, NewInvalidSignatureError("publicKey in Rekor SET has trailing data")
+	}
+	// FIXME: For public keys, let the caller provide the DER-formatted blob instead
+	// of round-tripping through PEM.
+	unverifiedKeyOrCertPEM, rest := pem.Decode(unverifiedKeyOrCertBytes)
+	if unverifiedKeyOrCertPEM == nil {
+		return time.Time{}, NewInvalidSignatureError("public key or cert to be matched against publicKey in Rekor SET is not in PEM format")
+	}
+	if len(rest) != 0 {
+		return time.Time{}, NewInvalidSignatureError("public key or cert to be matched against publicKey in Rekor SET has trailing data")
+	}
+	// NOTE: This compares the PEM payload, but not the object type or headers.
+	if !bytes.Equal(rekorKeyOrCertPEM.Bytes, unverifiedKeyOrCertPEM.Bytes) {
+		return time.Time{}, NewInvalidSignatureError("publicKey in Rekor SET does not match")
+	}
+	// == Match unverifiedSignatureBytes
+	unverifiedSignatureBytes, err := base64.StdEncoding.DecodeString(unverifiedBase64Signature)
+	if err != nil {
+		return time.Time{}, NewInvalidSignatureError(fmt.Sprintf("decoding signature base64: %v", err))
+	}
+	if !bytes.Equal(hashedRekordV001.Signature.Content, unverifiedSignatureBytes) {
+		return time.Time{}, NewInvalidSignatureError(fmt.Sprintf("signature in Rekor SET does not match: %#v vs. %#v",
+			string(hashedRekordV001.Signature.Content), string(unverifiedSignatureBytes)))
+	}
+
+	// == Match unverifiedPayloadBytes
+	if hashedRekordV001.Data == nil {
+		return time.Time{}, NewInvalidSignatureError(`Missing "data" field in hashedrekord`)
+	}
+	if hashedRekordV001.Data.Hash == nil {
+		return time.Time{}, NewInvalidSignatureError(`Missing "data.hash" field in hashedrekord`)
+	}
+	if hashedRekordV001.Data.Hash.Algorithm == nil {
+		return time.Time{}, NewInvalidSignatureError(`Missing "data.hash.algorithm" field in hashedrekord`)
+	}
+	if *hashedRekordV001.Data.Hash.Algorithm != models.HashedrekordV001SchemaDataHashAlgorithmSha256 {
+		return time.Time{}, NewInvalidSignatureError(fmt.Sprintf(`Unexpected "data.hash.algorithm" value %#v`, *hashedRekordV001.Data.Hash.Algorithm))
+	}
+	if hashedRekordV001.Data.Hash.Value == nil {
+		return time.Time{}, NewInvalidSignatureError(`Missing "data.hash.value" field in hashedrekord`)
+	}
+	rekorPayloadHash, err := hex.DecodeString(*hashedRekordV001.Data.Hash.Value)
+	if err != nil {
+		return time.Time{}, NewInvalidSignatureError(fmt.Sprintf(`Invalid "data.hash.value" field in hashedrekord: %v`, err))
+
+	}
+	unverifiedPayloadHash := sha256.Sum256(unverifiedPayloadBytes)
+	if !bytes.Equal(rekorPayloadHash, unverifiedPayloadHash[:]) {
+		return time.Time{}, NewInvalidSignatureError("payload in Rekor SET does not match")
+	}
+
+	// == All OK; return the relevant time.
+	return time.Unix(rekorPayload.IntegratedTime, 0), nil
+}
diff --git a/vendor/github.com/containers/image/v5/signature/policy_config.go b/vendor/github.com/containers/image/v5/signature/policy_config.go
index f8fdce2da5..5ca4ad7130 100644
--- a/vendor/github.com/containers/image/v5/signature/policy_config.go
+++ b/vendor/github.com/containers/image/v5/signature/policy_config.go
@@ -19,13 +19,13 @@ import (
 	"fmt"
 	"os"
 	"path/filepath"
-	"regexp"
 
 	"github.com/containers/image/v5/docker/reference"
 	"github.com/containers/image/v5/signature/internal"
 	"github.com/containers/image/v5/transports"
 	"github.com/containers/image/v5/types"
 	"github.com/containers/storage/pkg/homedir"
+	"github.com/containers/storage/pkg/regexp"
 )
 
 // systemDefaultPolicyPath is the policy path used for DefaultPolicy().
@@ -518,107 +518,6 @@ func (pr *prSignedBaseLayer) UnmarshalJSON(data []byte) error {
 	return nil
 }
 
-// newPRSigstoreSigned returns a new prSigstoreSigned if parameters are valid.
-func newPRSigstoreSigned(keyPath string, keyData []byte, signedIdentity PolicyReferenceMatch) (*prSigstoreSigned, error) {
-	if len(keyPath) > 0 && len(keyData) > 0 {
-		return nil, InvalidPolicyFormatError("keyType and keyData cannot be used simultaneously")
-	}
-	if signedIdentity == nil {
-		return nil, InvalidPolicyFormatError("signedIdentity not specified")
-	}
-	return &prSigstoreSigned{
-		prCommon:       prCommon{Type: prTypeSigstoreSigned},
-		KeyPath:        keyPath,
-		KeyData:        keyData,
-		SignedIdentity: signedIdentity,
-	}, nil
-}
-
-// newPRSigstoreSignedKeyPath is NewPRSigstoreSignedKeyPath, except it returns the private type.
-func newPRSigstoreSignedKeyPath(keyPath string, signedIdentity PolicyReferenceMatch) (*prSigstoreSigned, error) {
-	return newPRSigstoreSigned(keyPath, nil, signedIdentity)
-}
-
-// NewPRSigstoreSignedKeyPath returns a new "sigstoreSigned" PolicyRequirement using a KeyPath
-func NewPRSigstoreSignedKeyPath(keyPath string, signedIdentity PolicyReferenceMatch) (PolicyRequirement, error) {
-	return newPRSigstoreSignedKeyPath(keyPath, signedIdentity)
-}
-
-// newPRSigstoreSignedKeyData is NewPRSigstoreSignedKeyData, except it returns the private type.
-func newPRSigstoreSignedKeyData(keyData []byte, signedIdentity PolicyReferenceMatch) (*prSigstoreSigned, error) {
-	return newPRSigstoreSigned("", keyData, signedIdentity)
-}
-
-// NewPRSigstoreSignedKeyData returns a new "sigstoreSigned" PolicyRequirement using a KeyData
-func NewPRSigstoreSignedKeyData(keyData []byte, signedIdentity PolicyReferenceMatch) (PolicyRequirement, error) {
-	return newPRSigstoreSignedKeyData(keyData, signedIdentity)
-}
-
-// Compile-time check that prSigstoreSigned implements json.Unmarshaler.
-var _ json.Unmarshaler = (*prSigstoreSigned)(nil)
-
-// UnmarshalJSON implements the json.Unmarshaler interface.
-func (pr *prSigstoreSigned) UnmarshalJSON(data []byte) error {
-	*pr = prSigstoreSigned{}
-	var tmp prSigstoreSigned
-	var gotKeyPath, gotKeyData = false, false
-	var signedIdentity json.RawMessage
-	if err := internal.ParanoidUnmarshalJSONObject(data, func(key string) interface{} {
-		switch key {
-		case "type":
-			return &tmp.Type
-		case "keyPath":
-			gotKeyPath = true
-			return &tmp.KeyPath
-		case "keyData":
-			gotKeyData = true
-			return &tmp.KeyData
-		case "signedIdentity":
-			return &signedIdentity
-		default:
-			return nil
-		}
-	}); err != nil {
-		return err
-	}
-
-	if tmp.Type != prTypeSigstoreSigned {
-		return InvalidPolicyFormatError(fmt.Sprintf("Unexpected policy requirement type \"%s\"", tmp.Type))
-	}
-	if signedIdentity == nil {
-		tmp.SignedIdentity = NewPRMMatchRepoDigestOrExact()
-	} else {
-		si, err := newPolicyReferenceMatchFromJSON(signedIdentity)
-		if err != nil {
-			return err
-		}
-		tmp.SignedIdentity = si
-	}
-
-	var res *prSigstoreSigned
-	var err error
-	switch {
-	case gotKeyPath && gotKeyData:
-		return InvalidPolicyFormatError("keyPath and keyData cannot be used simultaneously")
-	case gotKeyPath && !gotKeyData:
-		res, err = newPRSigstoreSignedKeyPath(tmp.KeyPath, tmp.SignedIdentity)
-	case !gotKeyPath && gotKeyData:
-		res, err = newPRSigstoreSignedKeyData(tmp.KeyData, tmp.SignedIdentity)
-	case !gotKeyPath && !gotKeyData:
-		return InvalidPolicyFormatError("At least one of keyPath and keyData must be specified")
-	default: // Coverage: This should never happen
-		return fmt.Errorf("Impossible keyPath/keyData presence combination!?")
-	}
-	if err != nil {
-		// Coverage: This cannot currently happen, creating a prSigstoreSigned only fails
-		// if signedIdentity is nil, which we replace with a default above.
-		return err
-	}
-	*pr = *res
-
-	return nil
-}
-
 // newPolicyReferenceMatchFromJSON parses JSON data into a PolicyReferenceMatch implementation.
 func newPolicyReferenceMatchFromJSON(data []byte) (PolicyReferenceMatch, error) {
 	var typeField prmCommon
@@ -829,12 +728,12 @@ func (prm *prmExactRepository) UnmarshalJSON(data []byte) error {
 // Private objects for validateIdentityRemappingPrefix
 var (
 	// remapIdentityDomainRegexp matches exactly a reference domain (name[:port])
-	remapIdentityDomainRegexp = regexp.MustCompile("^" + reference.DomainRegexp.String() + "$")
+	remapIdentityDomainRegexp = regexp.Delayed("^" + reference.DomainRegexp.String() + "$")
 	// remapIdentityDomainPrefixRegexp matches a reference that starts with a domain;
 	// we need this because reference.NameRegexp accepts short names with docker.io implied.
-	remapIdentityDomainPrefixRegexp = regexp.MustCompile("^" + reference.DomainRegexp.String() + "/")
+	remapIdentityDomainPrefixRegexp = regexp.Delayed("^" + reference.DomainRegexp.String() + "/")
 	// remapIdentityNameRegexp matches exactly a reference.Named name (possibly unnormalized)
-	remapIdentityNameRegexp = regexp.MustCompile("^" + reference.NameRegexp.String() + "$")
+	remapIdentityNameRegexp = regexp.Delayed("^" + reference.NameRegexp.String() + "$")
 )
 
 // validateIdentityRemappingPrefix returns an InvalidPolicyFormatError if s is detected to be invalid
diff --git a/vendor/github.com/containers/image/v5/signature/policy_config_sigstore.go b/vendor/github.com/containers/image/v5/signature/policy_config_sigstore.go
new file mode 100644
index 0000000000..eeec6dc3eb
--- /dev/null
+++ b/vendor/github.com/containers/image/v5/signature/policy_config_sigstore.go
@@ -0,0 +1,343 @@
+package signature
+
+import (
+	"encoding/json"
+	"errors"
+	"fmt"
+
+	"github.com/containers/image/v5/signature/internal"
+)
+
+// PRSigstoreSignedOption is way to pass values to NewPRSigstoreSigned
+type PRSigstoreSignedOption func(*prSigstoreSigned) error
+
+// PRSigstoreSignedWithKeyPath specifies a value for the "keyPath" field when calling NewPRSigstoreSigned.
+func PRSigstoreSignedWithKeyPath(keyPath string) PRSigstoreSignedOption {
+	return func(pr *prSigstoreSigned) error {
+		if pr.KeyPath != "" {
+			return errors.New(`"keyPath" already specified`)
+		}
+		pr.KeyPath = keyPath
+		return nil
+	}
+}
+
+// PRSigstoreSignedWithKeyData specifies a value for the "keyData" field when calling NewPRSigstoreSigned.
+func PRSigstoreSignedWithKeyData(keyData []byte) PRSigstoreSignedOption {
+	return func(pr *prSigstoreSigned) error {
+		if pr.KeyData != nil {
+			return errors.New(`"keyData" already specified`)
+		}
+		pr.KeyData = keyData
+		return nil
+	}
+}
+
+// PRSigstoreSignedWithFulcio specifies a value for the "fulcio" field when calling NewPRSigstoreSigned.
+func PRSigstoreSignedWithFulcio(fulcio PRSigstoreSignedFulcio) PRSigstoreSignedOption {
+	return func(pr *prSigstoreSigned) error {
+		if pr.Fulcio != nil {
+			return errors.New(`"fulcio" already specified`)
+		}
+		pr.Fulcio = fulcio
+		return nil
+	}
+}
+
+// PRSigstoreSignedWithRekorPublicKeyPath specifies a value for the "rekorPublicKeyPath" field when calling NewPRSigstoreSigned.
+func PRSigstoreSignedWithRekorPublicKeyPath(rekorPublicKeyPath string) PRSigstoreSignedOption {
+	return func(pr *prSigstoreSigned) error {
+		if pr.RekorPublicKeyPath != "" {
+			return errors.New(`"rekorPublicKeyPath" already specified`)
+		}
+		pr.RekorPublicKeyPath = rekorPublicKeyPath
+		return nil
+	}
+}
+
+// PRSigstoreSignedWithRekorPublicKeyData specifies a value for the "rekorPublicKeyData" field when calling NewPRSigstoreSigned.
+func PRSigstoreSignedWithRekorPublicKeyData(rekorPublicKeyData []byte) PRSigstoreSignedOption {
+	return func(pr *prSigstoreSigned) error {
+		if pr.RekorPublicKeyData != nil {
+			return errors.New(`"rekorPublicKeyData" already specified`)
+		}
+		pr.RekorPublicKeyData = rekorPublicKeyData
+		return nil
+	}
+}
+
+// PRSigstoreSignedWithSignedIdentity specifies a value for the "signedIdentity" field when calling NewPRSigstoreSigned.
+func PRSigstoreSignedWithSignedIdentity(signedIdentity PolicyReferenceMatch) PRSigstoreSignedOption {
+	return func(pr *prSigstoreSigned) error {
+		if pr.SignedIdentity != nil {
+			return errors.New(`"signedIdentity" already specified`)
+		}
+		pr.SignedIdentity = signedIdentity
+		return nil
+	}
+}
+
+// newPRSigstoreSigned is NewPRSigstoreSigned, except it returns the private type.
+func newPRSigstoreSigned(options ...PRSigstoreSignedOption) (*prSigstoreSigned, error) {
+	res := prSigstoreSigned{
+		prCommon: prCommon{Type: prTypeSigstoreSigned},
+	}
+	for _, o := range options {
+		if err := o(&res); err != nil {
+			return nil, err
+		}
+	}
+
+	keySources := 0
+	if res.KeyPath != "" {
+		keySources++
+	}
+	if res.KeyData != nil {
+		keySources++
+	}
+	if res.Fulcio != nil {
+		keySources++
+	}
+	if keySources != 1 {
+		return nil, InvalidPolicyFormatError("exactly one of keyPath, keyData and fulcio must be specified")
+	}
+
+	if res.RekorPublicKeyPath != "" && res.RekorPublicKeyData != nil {
+		return nil, InvalidPolicyFormatError("rekorPublickeyType and rekorPublickeyData cannot be used simultaneously")
+	}
+	if res.Fulcio != nil && res.RekorPublicKeyPath == "" && res.RekorPublicKeyData == nil {
+		return nil, InvalidPolicyFormatError("At least one of RekorPublickeyPath and RekorPublickeyData must be specified if fulcio is used")
+	}
+
+	if res.SignedIdentity == nil {
+		return nil, InvalidPolicyFormatError("signedIdentity not specified")
+	}
+
+	return &res, nil
+}
+
+// NewPRSigstoreSigned returns a new "sigstoreSigned" PolicyRequirement based on options.
+func NewPRSigstoreSigned(options ...PRSigstoreSignedOption) (PolicyRequirement, error) {
+	return newPRSigstoreSigned(options...)
+}
+
+// NewPRSigstoreSignedKeyPath returns a new "sigstoreSigned" PolicyRequirement using a KeyPath
+func NewPRSigstoreSignedKeyPath(keyPath string, signedIdentity PolicyReferenceMatch) (PolicyRequirement, error) {
+	return NewPRSigstoreSigned(
+		PRSigstoreSignedWithKeyPath(keyPath),
+		PRSigstoreSignedWithSignedIdentity(signedIdentity),
+	)
+}
+
+// NewPRSigstoreSignedKeyData returns a new "sigstoreSigned" PolicyRequirement using a KeyData
+func NewPRSigstoreSignedKeyData(keyData []byte, signedIdentity PolicyReferenceMatch) (PolicyRequirement, error) {
+	return NewPRSigstoreSigned(
+		PRSigstoreSignedWithKeyData(keyData),
+		PRSigstoreSignedWithSignedIdentity(signedIdentity),
+	)
+}
+
+// Compile-time check that prSigstoreSigned implements json.Unmarshaler.
+var _ json.Unmarshaler = (*prSigstoreSigned)(nil)
+
+// UnmarshalJSON implements the json.Unmarshaler interface.
+func (pr *prSigstoreSigned) UnmarshalJSON(data []byte) error {
+	*pr = prSigstoreSigned{}
+	var tmp prSigstoreSigned
+	var gotKeyPath, gotKeyData, gotFulcio, gotRekorPublicKeyPath, gotRekorPublicKeyData bool
+	var fulcio prSigstoreSignedFulcio
+	var signedIdentity json.RawMessage
+	if err := internal.ParanoidUnmarshalJSONObject(data, func(key string) interface{} {
+		switch key {
+		case "type":
+			return &tmp.Type
+		case "keyPath":
+			gotKeyPath = true
+			return &tmp.KeyPath
+		case "keyData":
+			gotKeyData = true
+			return &tmp.KeyData
+		case "fulcio":
+			gotFulcio = true
+			return &fulcio
+		case "rekorPublicKeyPath":
+			gotRekorPublicKeyPath = true
+			return &tmp.RekorPublicKeyPath
+		case "rekorPublicKeyData":
+			gotRekorPublicKeyData = true
+			return &tmp.RekorPublicKeyData
+		case "signedIdentity":
+			return &signedIdentity
+		default:
+			return nil
+		}
+	}); err != nil {
+		return err
+	}
+
+	if tmp.Type != prTypeSigstoreSigned {
+		return InvalidPolicyFormatError(fmt.Sprintf("Unexpected policy requirement type \"%s\"", tmp.Type))
+	}
+	if signedIdentity == nil {
+		tmp.SignedIdentity = NewPRMMatchRepoDigestOrExact()
+	} else {
+		si, err := newPolicyReferenceMatchFromJSON(signedIdentity)
+		if err != nil {
+			return err
+		}
+		tmp.SignedIdentity = si
+	}
+
+	var opts []PRSigstoreSignedOption
+	if gotKeyPath {
+		opts = append(opts, PRSigstoreSignedWithKeyPath(tmp.KeyPath))
+	}
+	if gotKeyData {
+		opts = append(opts, PRSigstoreSignedWithKeyData(tmp.KeyData))
+	}
+	if gotFulcio {
+		opts = append(opts, PRSigstoreSignedWithFulcio(&fulcio))
+	}
+	if gotRekorPublicKeyPath {
+		opts = append(opts, PRSigstoreSignedWithRekorPublicKeyPath(tmp.RekorPublicKeyPath))
+	}
+	if gotRekorPublicKeyData {
+		opts = append(opts, PRSigstoreSignedWithRekorPublicKeyData(tmp.RekorPublicKeyData))
+	}
+	opts = append(opts, PRSigstoreSignedWithSignedIdentity(tmp.SignedIdentity))
+
+	res, err := newPRSigstoreSigned(opts...)
+	if err != nil {
+		return err
+	}
+	*pr = *res
+	return nil
+}
+
+// PRSigstoreSignedFulcioOption is a way to pass values to NewPRSigstoreSignedFulcio
+type PRSigstoreSignedFulcioOption func(*prSigstoreSignedFulcio) error
+
+// PRSigstoreSignedFulcioWithCAPath specifies a value for the "caPath" field when calling NewPRSigstoreSignedFulcio
+func PRSigstoreSignedFulcioWithCAPath(caPath string) PRSigstoreSignedFulcioOption {
+	return func(f *prSigstoreSignedFulcio) error {
+		if f.CAPath != "" {
+			return errors.New(`"caPath" already specified`)
+		}
+		f.CAPath = caPath
+		return nil
+	}
+}
+
+// PRSigstoreSignedFulcioWithCAData specifies a value for the "caData" field when calling NewPRSigstoreSignedFulcio
+func PRSigstoreSignedFulcioWithCAData(caData []byte) PRSigstoreSignedFulcioOption {
+	return func(f *prSigstoreSignedFulcio) error {
+		if f.CAData != nil {
+			return errors.New(`"caData" already specified`)
+		}
+		f.CAData = caData
+		return nil
+	}
+}
+
+// PRSigstoreSignedFulcioWithOIDCIssuer specifies a value for the "oidcIssuer" field when calling NewPRSigstoreSignedFulcio
+func PRSigstoreSignedFulcioWithOIDCIssuer(oidcIssuer string) PRSigstoreSignedFulcioOption {
+	return func(f *prSigstoreSignedFulcio) error {
+		if f.OIDCIssuer != "" {
+			return errors.New(`"oidcIssuer" already specified`)
+		}
+		f.OIDCIssuer = oidcIssuer
+		return nil
+	}
+}
+
+// PRSigstoreSignedFulcioWithSubjectEmail specifies a value for the "subjectEmail" field when calling NewPRSigstoreSignedFulcio
+func PRSigstoreSignedFulcioWithSubjectEmail(subjectEmail string) PRSigstoreSignedFulcioOption {
+	return func(f *prSigstoreSignedFulcio) error {
+		if f.SubjectEmail != "" {
+			return errors.New(`"subjectEmail" already specified`)
+		}
+		f.SubjectEmail = subjectEmail
+		return nil
+	}
+}
+
+// newPRSigstoreSignedFulcio is NewPRSigstoreSignedFulcio, except it returns the private type
+func newPRSigstoreSignedFulcio(options ...PRSigstoreSignedFulcioOption) (*prSigstoreSignedFulcio, error) {
+	res := prSigstoreSignedFulcio{}
+	for _, o := range options {
+		if err := o(&res); err != nil {
+			return nil, err
+		}
+	}
+
+	if res.CAPath != "" && res.CAData != nil {
+		return nil, InvalidPolicyFormatError("caPath and caData cannot be used simultaneously")
+	}
+	if res.CAPath == "" && res.CAData == nil {
+		return nil, InvalidPolicyFormatError("At least one of caPath and caData must be specified")
+	}
+	if res.OIDCIssuer == "" {
+		return nil, InvalidPolicyFormatError("oidcIssuer not specified")
+	}
+	if res.SubjectEmail == "" {
+		return nil, InvalidPolicyFormatError("subjectEmail not specified")
+	}
+
+	return &res, nil
+}
+
+// NewPRSigstoreSignedFulcio returns a PRSigstoreSignedFulcio based on options.
+func NewPRSigstoreSignedFulcio(options ...PRSigstoreSignedFulcioOption) (PRSigstoreSignedFulcio, error) {
+	return newPRSigstoreSignedFulcio(options...)
+}
+
+// Compile-time check that prSigstoreSignedFulcio implements json.Unmarshaler.
+var _ json.Unmarshaler = (*prSigstoreSignedFulcio)(nil)
+
+func (f *prSigstoreSignedFulcio) UnmarshalJSON(data []byte) error {
+	*f = prSigstoreSignedFulcio{}
+	var tmp prSigstoreSignedFulcio
+	var gotCAPath, gotCAData, gotOIDCIssuer, gotSubjectEmail bool // = false...
+	if err := internal.ParanoidUnmarshalJSONObject(data, func(key string) interface{} {
+		switch key {
+		case "caPath":
+			gotCAPath = true
+			return &tmp.CAPath
+		case "caData":
+			gotCAData = true
+			return &tmp.CAData
+		case "oidcIssuer":
+			gotOIDCIssuer = true
+			return &tmp.OIDCIssuer
+		case "subjectEmail":
+			gotSubjectEmail = true
+			return &tmp.SubjectEmail
+		default:
+			return nil
+		}
+	}); err != nil {
+		return err
+	}
+
+	var opts []PRSigstoreSignedFulcioOption
+	if gotCAPath {
+		opts = append(opts, PRSigstoreSignedFulcioWithCAPath(tmp.CAPath))
+	}
+	if gotCAData {
+		opts = append(opts, PRSigstoreSignedFulcioWithCAData(tmp.CAData))
+	}
+	if gotOIDCIssuer {
+		opts = append(opts, PRSigstoreSignedFulcioWithOIDCIssuer(tmp.OIDCIssuer))
+	}
+	if gotSubjectEmail {
+		opts = append(opts, PRSigstoreSignedFulcioWithSubjectEmail(tmp.SubjectEmail))
+	}
+
+	res, err := newPRSigstoreSignedFulcio(opts...)
+	if err != nil {
+		return err
+	}
+
+	*f = *res
+	return nil
+}
diff --git a/vendor/github.com/containers/image/v5/signature/policy_eval_sigstore.go b/vendor/github.com/containers/image/v5/signature/policy_eval_sigstore.go
index ccf1d80ac8..dcf5592a8e 100644
--- a/vendor/github.com/containers/image/v5/signature/policy_eval_sigstore.go
+++ b/vendor/github.com/containers/image/v5/signature/policy_eval_sigstore.go
@@ -4,6 +4,9 @@ package signature
 
 import (
 	"context"
+	"crypto"
+	"crypto/ecdsa"
+	"crypto/x509"
 	"errors"
 	"fmt"
 	"os"
@@ -17,6 +20,100 @@ import (
 	"github.com/sigstore/sigstore/pkg/cryptoutils"
 )
 
+// loadBytesFromDataOrPath ensures there is at most one of ${prefix}Data and ${prefix}Path set,
+// and returns the referenced data, or nil if neither is set.
+func loadBytesFromDataOrPath(prefix string, data []byte, path string) ([]byte, error) {
+	switch {
+	case data != nil && path != "":
+		return nil, fmt.Errorf(`Internal inconsistency: both "%sPath" and "%sData" specified`, prefix, prefix)
+	case path != "":
+		d, err := os.ReadFile(path)
+		if err != nil {
+			return nil, err
+		}
+		return d, nil
+	case data != nil:
+		return data, nil
+	default: // Nothing
+		return nil, nil
+	}
+}
+
+// prepareTrustRoot creates a fulcioTrustRoot from the input data.
+// (This also prevents external implementations of this interface, ensuring that prSigstoreSignedFulcio is the only one.)
+func (f *prSigstoreSignedFulcio) prepareTrustRoot() (*fulcioTrustRoot, error) {
+	caCertBytes, err := loadBytesFromDataOrPath("fulcioCA", f.CAData, f.CAPath)
+	if err != nil {
+		return nil, err
+	}
+	if caCertBytes == nil {
+		return nil, errors.New(`Internal inconsistency: Fulcio specified with neither "caPath" nor "caData"`)
+	}
+	certs := x509.NewCertPool()
+	if ok := certs.AppendCertsFromPEM(caCertBytes); !ok {
+		return nil, errors.New("error loading Fulcio CA certificates")
+	}
+	fulcio := fulcioTrustRoot{
+		caCertificates: certs,
+		oidcIssuer:     f.OIDCIssuer,
+		subjectEmail:   f.SubjectEmail,
+	}
+	if err := fulcio.validate(); err != nil {
+		return nil, err
+	}
+	return &fulcio, nil
+}
+
+// sigstoreSignedTrustRoot contains an already parsed version of the prSigstoreSigned policy
+type sigstoreSignedTrustRoot struct {
+	publicKey      crypto.PublicKey
+	fulcio         *fulcioTrustRoot
+	rekorPublicKey *ecdsa.PublicKey
+}
+
+func (pr *prSigstoreSigned) prepareTrustRoot() (*sigstoreSignedTrustRoot, error) {
+	res := sigstoreSignedTrustRoot{}
+
+	publicKeyPEM, err := loadBytesFromDataOrPath("key", pr.KeyData, pr.KeyPath)
+	if err != nil {
+		return nil, err
+	}
+	if publicKeyPEM != nil {
+		pk, err := cryptoutils.UnmarshalPEMToPublicKey(publicKeyPEM)
+		if err != nil {
+			return nil, fmt.Errorf("parsing public key: %w", err)
+		}
+		res.publicKey = pk
+	}
+
+	if pr.Fulcio != nil {
+		f, err := pr.Fulcio.prepareTrustRoot()
+		if err != nil {
+			return nil, err
+		}
+		res.fulcio = f
+	}
+
+	rekorPublicKeyPEM, err := loadBytesFromDataOrPath("rekorPublicKey", pr.RekorPublicKeyData, pr.RekorPublicKeyPath)
+	if err != nil {
+		return nil, err
+	}
+	if rekorPublicKeyPEM != nil {
+		pk, err := cryptoutils.UnmarshalPEMToPublicKey(rekorPublicKeyPEM)
+		if err != nil {
+			return nil, fmt.Errorf("parsing Rekor public key: %w", err)
+		}
+		pkECDSA, ok := pk.(*ecdsa.PublicKey)
+		if !ok {
+			return nil, fmt.Errorf("Rekor public key is not using ECDSA")
+
+		}
+		res.rekorPublicKey = pkECDSA
+	}
+
+	return &res, nil
+}
+
 func (pr *prSigstoreSigned) isSignatureAuthorAccepted(ctx context.Context, image private.UnparsedImage, sig []byte) (signatureAcceptanceResult, *Signature, error) {
 	// We don’t know of a single user of this API, and we might return unexpected values in Signature.
 	// For now, just punt.
@@ -24,24 +121,10 @@ func (pr *prSigstoreSigned) isSignatureAuthorAccepted(ctx context.Context, image
 }
 
 func (pr *prSigstoreSigned) isSignatureAccepted(ctx context.Context, image private.UnparsedImage, sig signature.Sigstore) (signatureAcceptanceResult, error) {
-	if pr.KeyPath != "" && pr.KeyData != nil {
-		return sarRejected, errors.New(`Internal inconsistency: both "keyPath" and "keyData" specified`)
-	}
 	// FIXME: move this to per-context initialization
-	var publicKeyPEM []byte
-	if pr.KeyData != nil {
-		publicKeyPEM = pr.KeyData
-	} else {
-		d, err := os.ReadFile(pr.KeyPath)
-		if err != nil {
-			return sarRejected, err
-		}
-		publicKeyPEM = d
-	}
-
-	publicKey, err := cryptoutils.UnmarshalPEMToPublicKey(publicKeyPEM)
+	trustRoot, err := pr.prepareTrustRoot()
 	if err != nil {
-		return sarRejected, fmt.Errorf("parsing public key: %w", err)
+		return sarRejected, err
 	}
 
 	untrustedAnnotations := sig.UntrustedAnnotations()
@@ -49,8 +132,66 @@ func (pr *prSigstoreSigned) isSignatureAccepted(ctx context.Context, image priva
 	if !ok {
 		return sarRejected, fmt.Errorf("missing %s annotation", signature.SigstoreSignatureAnnotationKey)
 	}
+	untrustedPayload := sig.UntrustedPayload()
+
+	var publicKey crypto.PublicKey
+	switch {
+	case trustRoot.publicKey != nil && trustRoot.fulcio != nil: // newPRSigstoreSigned rejects such combinations.
+		return sarRejected, errors.New("Internal inconsistency: Both a public key and Fulcio CA specified")
+	case trustRoot.publicKey == nil && trustRoot.fulcio == nil: // newPRSigstoreSigned rejects such combinations.
+		return sarRejected, errors.New("Internal inconsistency: Neither a public key nor a Fulcio CA specified")
 
-	signature, err := internal.VerifySigstorePayload(publicKey, sig.UntrustedPayload(), untrustedBase64Signature, internal.SigstorePayloadAcceptanceRules{
+	case trustRoot.publicKey != nil:
+		if trustRoot.rekorPublicKey != nil {
+			untrustedSET, ok := untrustedAnnotations[signature.SigstoreSETAnnotationKey]
+			if !ok { // For user convenience; passing an empty []byte to VerifyRekorSet should work.
+				return sarRejected, fmt.Errorf("missing %s annotation", signature.SigstoreSETAnnotationKey)
+			}
+			// We could use publicKeyPEM directly, but let’s re-marshal to avoid inconsistencies.
+			// FIXME: We could just generate DER instead of the full PEM text
+			recreatedPublicKeyPEM, err := cryptoutils.MarshalPublicKeyToPEM(trustRoot.publicKey)
+			if err != nil {
+				// Coverage: The key was loaded from a PEM format, so it’s unclear how this could fail.
+				// (PEM is not essential, MarshalPublicKeyToPEM can only fail if marshaling to ASN1.DER fails.)
+				return sarRejected, fmt.Errorf("re-marshaling public key to PEM: %w", err)
+
+			}
+			// We don’t care about the Rekor timestamp, just about log presence.
+			if _, err := internal.VerifyRekorSET(trustRoot.rekorPublicKey, []byte(untrustedSET), recreatedPublicKeyPEM, untrustedBase64Signature, untrustedPayload); err != nil {
+				return sarRejected, err
+			}
+		}
+		publicKey = trustRoot.publicKey
+
+	case trustRoot.fulcio != nil:
+		if trustRoot.rekorPublicKey == nil { // newPRSigstoreSigned rejects such combinations.
+			return sarRejected, errors.New("Internal inconsistency: Fulcio CA specified without a Rekor public key")
+		}
+		untrustedSET, ok := untrustedAnnotations[signature.SigstoreSETAnnotationKey]
+		if !ok { // For user convenience; passing an empty []byte to VerifyRekorSet should correctly reject it anyway.
+			return sarRejected, fmt.Errorf("missing %s annotation", signature.SigstoreSETAnnotationKey)
+		}
+		untrustedCert, ok := untrustedAnnotations[signature.SigstoreCertificateAnnotationKey]
+		if !ok { // For user convenience; passing an empty []byte to VerifyRekorSet should correctly reject it anyway.
+			return sarRejected, fmt.Errorf("missing %s annotation", signature.SigstoreCertificateAnnotationKey)
+		}
+		var untrustedIntermediateChainBytes []byte
+		if untrustedIntermediateChain, ok := untrustedAnnotations[signature.SigstoreIntermediateCertificateChainAnnotationKey]; ok {
+			untrustedIntermediateChainBytes = []byte(untrustedIntermediateChain)
+		}
+		pk, err := verifyRekorFulcio(trustRoot.rekorPublicKey, trustRoot.fulcio,
+			[]byte(untrustedSET), []byte(untrustedCert), untrustedIntermediateChainBytes, untrustedBase64Signature, untrustedPayload)
+		if err != nil {
+			return sarRejected, err
+		}
+		publicKey = pk
+	}
+
+	if publicKey == nil {
+		// Coverage: This should never happen, we have already excluded the possibility in the switch above.
+		return sarRejected, fmt.Errorf("Internal inconsistency: publicKey not set before verifying sigstore payload")
+	}
+	signature, err := internal.VerifySigstorePayload(publicKey, untrustedPayload, untrustedBase64Signature, internal.SigstorePayloadAcceptanceRules{
 		ValidateSignedDockerReference: func(ref string) error {
 			if !pr.SignedIdentity.matchesDockerReference(image, ref) {
 				return PolicyRequirementError(fmt.Sprintf("Signature for identity %s is not accepted", ref))
diff --git a/vendor/github.com/containers/image/v5/signature/policy_types.go b/vendor/github.com/containers/image/v5/signature/policy_types.go
index 9e837452a7..96e91a0a9c 100644
--- a/vendor/github.com/containers/image/v5/signature/policy_types.go
+++ b/vendor/github.com/containers/image/v5/signature/policy_types.go
@@ -111,13 +111,24 @@ type prSignedBaseLayer struct {
 type prSigstoreSigned struct {
 	prCommon
 
-	// KeyPath is a pathname to a local file containing the trusted key. Exactly one of KeyPath and KeyData must be specified.
+	// KeyPath is a pathname to a local file containing the trusted key. Exactly one of KeyPath, KeyData, Fulcio must be specified.
 	KeyPath string `json:"keyPath,omitempty"`
-	// KeyData contains the trusted key, base64-encoded. Exactly one of KeyPath and KeyData must be specified.
+	// KeyData contains the trusted key, base64-encoded. Exactly one of KeyPath, KeyData, Fulcio must be specified.
 	KeyData []byte `json:"keyData,omitempty"`
 	// FIXME: Multiple public keys?
 
-	// FIXME: Support fulcio+rekor as an alternative.
+	// Fulcio specifies which Fulcio-generated certificates are accepted. Exactly one of KeyPath, KeyData, Fulcio must be specified.
+	// If Fulcio is specified, one of RekorPublicKeyPath or RekorPublicKeyData must be specified as well.
+	Fulcio PRSigstoreSignedFulcio `json:"fulcio,omitempty"`
+
+	// RekorPublicKeyPath is a pathname to local file containing a public key of a Rekor server which must record acceptable signatures.
+	// If Fulcio is used, one of RekorPublicKeyPath or RekorPublicKeyData must be specified as well; otherwise it is optional
+	// (and Rekor inclusion is not required if a Rekor public key is not specified).
+	RekorPublicKeyPath string `json:"rekorPublicKeyPath,omitempty"`
+	// RekorPublicKeyPath contain a base64-encoded public key of a Rekor server which must record acceptable signatures.
+	// If Fulcio is used, one of RekorPublicKeyPath or RekorPublicKeyData must be specified as well; otherwise it is optional
+	// (and Rekor inclusion is not required if a Rekor public key is not specified).
+	RekorPublicKeyData []byte `json:"rekorPublicKeyData,omitempty"`
 
 	// SignedIdentity specifies what image identity the signature must be claiming about the image.
 	// Defaults to "matchRepoDigestOrExact" if not specified.
@@ -125,6 +136,26 @@ type prSigstoreSigned struct {
 	SignedIdentity PolicyReferenceMatch `json:"signedIdentity"`
 }
 
+// PRSigstoreSignedFulcio contains Fulcio configuration options for a "sigstoreSigned" PolicyRequirement.
+// This is a public type with a single private implementation.
+type PRSigstoreSignedFulcio interface {
+	// toFulcioTrustRoot creates a fulcioTrustRoot from the input data.
+	// (This also prevents external implementations of this interface, ensuring that prSigstoreSignedFulcio is the only one.)
+	prepareTrustRoot() (*fulcioTrustRoot, error)
+}
+
+// prSigstoreSignedFulcio collects Fulcio configuration options for prSigstoreSigned
+type prSigstoreSignedFulcio struct {
+	// CAPath a path to a file containing accepted CA root certificates, in PEM format. Exactly one of CAPath and CAData must be specified.
+	CAPath string `json:"caPath,omitempty"`
+	// CAData contains accepted CA root certificates in PEM format, all of that base64-encoded. Exactly one of CAPath and CAData must be specified.
+	CAData []byte `json:"caData,omitempty"`
+	// OIDCIssuer specifies the expected OIDC issuer, recorded by Fulcio into the generated certificates.
+	OIDCIssuer string `json:"oidcIssuer,omitempty"`
+	// SubjectEmail specifies the expected email address of the authenticated OIDC identity, recorded by Fulcio into the generated certificates.
+	SubjectEmail string `json:"subjectEmail,omitempty"`
+}
+
 // PolicyReferenceMatch specifies a set of image identities accepted in PolicyRequirement.
 // The type is public, but its implementation is private.
 
diff --git a/vendor/github.com/containers/image/v5/signature/sigstore/copied.go b/vendor/github.com/containers/image/v5/signature/sigstore/copied.go
index dbc03ec0a0..0233c4cb86 100644
--- a/vendor/github.com/containers/image/v5/signature/sigstore/copied.go
+++ b/vendor/github.com/containers/image/v5/signature/sigstore/copied.go
@@ -10,6 +10,7 @@ import (
 	"errors"
 	"fmt"
 
+	"github.com/sigstore/sigstore/pkg/cryptoutils"
 	"github.com/sigstore/sigstore/pkg/signature"
 	"github.com/theupdateframework/go-tuf/encrypted"
 )
@@ -68,3 +69,31 @@ func loadPrivateKey(key []byte, pass []byte) (signature.SignerVerifier, error) {
 		return nil, errors.New("unsupported key type")
 	}
 }
+
+// simplified from sigstore/cosign/pkg/cosign.marshalKeyPair
+// loadPrivateKey always requires a encryption, so this always requires a passphrase.
+func marshalKeyPair(privateKey crypto.PrivateKey, publicKey crypto.PublicKey, password []byte) (_privateKey []byte, _publicKey []byte, err error) {
+	x509Encoded, err := x509.MarshalPKCS8PrivateKey(privateKey)
+	if err != nil {
+		return nil, nil, fmt.Errorf("x509 encoding private key: %w", err)
+	}
+
+	encBytes, err := encrypted.Encrypt(x509Encoded, password)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	// store in PEM format
+	privBytes := pem.EncodeToMemory(&pem.Block{
+		Bytes: encBytes,
+		Type:  sigstorePrivateKeyPemType,
+	})
+
+	// Now do the public key
+	pubBytes, err := cryptoutils.MarshalPublicKeyToPEM(publicKey)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	return privBytes, pubBytes, nil
+}
diff --git a/vendor/github.com/containers/image/v5/signature/sigstore/generate.go b/vendor/github.com/containers/image/v5/signature/sigstore/generate.go
new file mode 100644
index 0000000000..77520c1232
--- /dev/null
+++ b/vendor/github.com/containers/image/v5/signature/sigstore/generate.go
@@ -0,0 +1,35 @@
+package sigstore
+
+import (
+	"crypto/ecdsa"
+	"crypto/elliptic"
+	"crypto/rand"
+)
+
+// GenerateKeyPairResult is a struct to ensure the private and public parts can not be confused by the caller.
+type GenerateKeyPairResult struct {
+	PublicKey  []byte
+	PrivateKey []byte
+}
+
+// GenerateKeyPair generates a public/private key pair usable for signing images using the sigstore format,
+// and returns key representations suitable for storing in long-term files (with the private key encrypted using the provided passphrase).
+// The specific key kind (e.g. algorithm, size), as well as the file format, are unspecified by this API,
+// and can change with best practices over time.
+func GenerateKeyPair(passphrase []byte) (*GenerateKeyPairResult, error) {
+	// https://github.com/sigstore/cosign/blob/main/specs/SIGNATURE_SPEC.md#signature-schemes
+	// only requires ECDSA-P256 to be supported, so that’s what we must use.
+	rawKey, err := ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
+	if err != nil {
+		// Coverage: This can fail only if the randomness source fails
+		return nil, err
+	}
+	private, public, err := marshalKeyPair(rawKey, rawKey.Public(), passphrase)
+	if err != nil {
+		return nil, err
+	}
+	return &GenerateKeyPairResult{
+		PublicKey:  public,
+		PrivateKey: private,
+	}, nil
+}
diff --git a/vendor/github.com/containers/libtrust/CODE-OF-CONDUCT.md b/vendor/github.com/containers/libtrust/CODE-OF-CONDUCT.md
index 83b061c70b..a7d8acbfcf 100644
--- a/vendor/github.com/containers/libtrust/CODE-OF-CONDUCT.md
+++ b/vendor/github.com/containers/libtrust/CODE-OF-CONDUCT.md
@@ -1,3 +1,3 @@
 ## The libtrust Project Community Code of Conduct
 
-The libtrust project follows the [Containers Community Code of Conduct](https://github.com/containers/common/blob/master/CODE-OF-CONDUCT.md).
+The libtrust project follows the [Containers Community Code of Conduct](https://github.com/containers/common/blob/main/CODE-OF-CONDUCT.md).
diff --git a/vendor/github.com/containers/libtrust/SECURITY.md b/vendor/github.com/containers/libtrust/SECURITY.md
index fab2c41e89..966f4f0533 100644
--- a/vendor/github.com/containers/libtrust/SECURITY.md
+++ b/vendor/github.com/containers/libtrust/SECURITY.md
@@ -1,3 +1,3 @@
 ## Security and Disclosure Information Policy for the libtrust Project
 
-The libtrust Project follows the [Security and Disclosure Information Policy](https://github.com/containers/common/blob/master/SECURITY.md) for the Containers Projects.
+The libtrust Project follows the [Security and Disclosure Information Policy](https://github.com/containers/common/blob/main/SECURITY.md) for the Containers Projects.
diff --git a/vendor/github.com/coreos/go-oidc/v3/oidc/jwks.go b/vendor/github.com/coreos/go-oidc/v3/oidc/jwks.go
index fdcfba81ea..50dad7e059 100644
--- a/vendor/github.com/coreos/go-oidc/v3/oidc/jwks.go
+++ b/vendor/github.com/coreos/go-oidc/v3/oidc/jwks.go
@@ -12,7 +12,7 @@ import (
 	"sync"
 	"time"
 
-	jose "gopkg.in/square/go-jose.v2"
+	jose "github.com/go-jose/go-jose/v3"
 )
 
 // StaticKeySet is a verifier that validates JWT against a static set of public keys.
diff --git a/vendor/github.com/coreos/go-oidc/v3/oidc/verify.go b/vendor/github.com/coreos/go-oidc/v3/oidc/verify.go
index b0dd60fa99..ade861572b 100644
--- a/vendor/github.com/coreos/go-oidc/v3/oidc/verify.go
+++ b/vendor/github.com/coreos/go-oidc/v3/oidc/verify.go
@@ -12,8 +12,8 @@ import (
 	"strings"
 	"time"
 
+	jose "github.com/go-jose/go-jose/v3"
 	"golang.org/x/oauth2"
-	jose "gopkg.in/square/go-jose.v2"
 )
 
 const (
diff --git a/vendor/github.com/cyberphone/json-canonicalization/LICENSE b/vendor/github.com/cyberphone/json-canonicalization/LICENSE
new file mode 100644
index 0000000000..591211595a
--- /dev/null
+++ b/vendor/github.com/cyberphone/json-canonicalization/LICENSE
@@ -0,0 +1,13 @@
+   Copyright 2018 Anders Rundgren
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       https://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
diff --git a/vendor/github.com/cyberphone/json-canonicalization/go/src/webpki.org/jsoncanonicalizer/es6numfmt.go b/vendor/github.com/cyberphone/json-canonicalization/go/src/webpki.org/jsoncanonicalizer/es6numfmt.go
new file mode 100644
index 0000000000..92574a3f4f
--- /dev/null
+++ b/vendor/github.com/cyberphone/json-canonicalization/go/src/webpki.org/jsoncanonicalizer/es6numfmt.go
@@ -0,0 +1,71 @@
+//
+//  Copyright 2006-2019 WebPKI.org (http://webpki.org).
+//
+//  Licensed under the Apache License, Version 2.0 (the "License");
+//  you may not use this file except in compliance with the License.
+//  You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+//  Unless required by applicable law or agreed to in writing, software
+//  distributed under the License is distributed on an "AS IS" BASIS,
+//  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+//  See the License for the specific language governing permissions and
+//  limitations under the License.
+//
+ 
+// This package converts numbers in IEEE-754 double precision into the
+// format specified for JSON in EcmaScript Version 6 and forward.
+// The core application for this is canonicalization:
+// https://tools.ietf.org/html/draft-rundgren-json-canonicalization-scheme-02
+
+package jsoncanonicalizer
+
+import (
+    "errors"
+    "math"
+    "strconv"
+    "strings"
+)
+
+const invalidPattern uint64 = 0x7ff0000000000000
+
+func NumberToJSON(ieeeF64 float64) (res string, err error) {
+    ieeeU64 := math.Float64bits(ieeeF64)
+
+    // Special case: NaN and Infinity are invalid in JSON
+    if (ieeeU64 & invalidPattern) == invalidPattern {
+        return "null", errors.New("Invalid JSON number: " + strconv.FormatUint(ieeeU64, 16))
+    }
+
+    // Special case: eliminate "-0" as mandated by the ES6-JSON/JCS specifications
+    if ieeeF64 == 0 {  // Right, this line takes both -0 and 0
+        return "0", nil
+    }
+
+    // Deal with the sign separately
+    var sign string = ""
+    if ieeeF64 < 0 {
+        ieeeF64 =-ieeeF64
+        sign = "-"
+    }
+
+    // ES6 has a unique "g" format
+    var format byte = 'e'
+    if ieeeF64 < 1e+21 && ieeeF64 >= 1e-6 {
+        format = 'f'
+    }
+
+    // The following should do the trick:
+    es6Formatted := strconv.FormatFloat(ieeeF64, format, -1, 64)
+
+    // Minor cleanup
+    exponent := strings.IndexByte(es6Formatted, 'e')
+    if exponent > 0 {
+        // Go outputs "1e+09" which must be rewritten as "1e+9"
+        if es6Formatted[exponent + 2] == '0' {
+            es6Formatted = es6Formatted[:exponent + 2] + es6Formatted[exponent + 3:]
+        }
+    }
+    return sign + es6Formatted, nil
+}
diff --git a/vendor/github.com/cyberphone/json-canonicalization/go/src/webpki.org/jsoncanonicalizer/jsoncanonicalizer.go b/vendor/github.com/cyberphone/json-canonicalization/go/src/webpki.org/jsoncanonicalizer/jsoncanonicalizer.go
new file mode 100644
index 0000000000..661f41055e
--- /dev/null
+++ b/vendor/github.com/cyberphone/json-canonicalization/go/src/webpki.org/jsoncanonicalizer/jsoncanonicalizer.go
@@ -0,0 +1,378 @@
+//
+//  Copyright 2006-2019 WebPKI.org (http://webpki.org).
+//
+//  Licensed under the Apache License, Version 2.0 (the "License");
+//  you may not use this file except in compliance with the License.
+//  You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+//  Unless required by applicable law or agreed to in writing, software
+//  distributed under the License is distributed on an "AS IS" BASIS,
+//  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+//  See the License for the specific language governing permissions and
+//  limitations under the License.
+//
+ 
+// This package transforms JSON data in UTF-8 according to:
+// https://tools.ietf.org/html/draft-rundgren-json-canonicalization-scheme-02
+
+package jsoncanonicalizer
+
+import (
+    "errors"
+    "container/list"
+    "fmt"
+    "strconv"
+    "strings"
+    "unicode/utf16"
+)
+
+type nameValueType struct {
+    name string
+    sortKey []uint16
+    value string
+}
+
+// JSON standard escapes (modulo \u)
+var asciiEscapes  = []byte{'\\', '"', 'b',  'f',  'n',  'r',  't'}
+var binaryEscapes = []byte{'\\', '"', '\b', '\f', '\n', '\r', '\t'}
+
+// JSON literals
+var literals      = []string{"true", "false", "null"}
+    
+func Transform(jsonData []byte) (result []byte, e error) {
+
+    // JSON data MUST be UTF-8 encoded
+    var jsonDataLength int = len(jsonData)
+
+    // Current pointer in jsonData
+    var index int = 0
+
+    // "Forward" declarations are needed for closures referring each other
+    var parseElement func() string
+    var parseSimpleType func() string
+    var parseQuotedString func() string
+    var parseObject func() string
+    var parseArray func() string
+
+    var globalError error = nil
+
+    checkError := func(e error) {
+        // We only honor the first reported error
+        if globalError == nil {
+            globalError = e
+        }
+    }
+    
+    setError := func(msg string) {
+        checkError(errors.New(msg))
+    }
+
+    isWhiteSpace := func(c byte) bool {
+        return c == 0x20 || c == 0x0a || c == 0x0d || c == 0x09
+    }
+
+    nextChar := func() byte {
+        if index < jsonDataLength {
+            c := jsonData[index]
+            if c > 0x7f {
+                setError("Unexpected non-ASCII character")
+            }
+            index++
+            return c
+        }
+        setError("Unexpected EOF reached")
+        return '"'
+    }
+
+    scan := func() byte {
+        for {
+            c := nextChar()
+            if isWhiteSpace(c) {
+                continue;
+            }
+            return c
+        }
+    }
+
+    scanFor := func(expected byte) {
+        c := scan()
+        if c != expected {
+            setError("Expected '" + string(expected) + "' but got '" + string(c) + "'")
+        }
+    }
+
+    getUEscape := func() rune {
+        start := index
+        nextChar()
+        nextChar()
+        nextChar()
+        nextChar()
+        if globalError != nil {
+            return 0
+        }
+        u16, err := strconv.ParseUint(string(jsonData[start:index]), 16, 64)
+        checkError(err)
+        return rune(u16)
+    }
+
+    testNextNonWhiteSpaceChar := func() byte {
+        save := index
+        c := scan()
+        index = save
+        return c
+    }
+
+    decorateString := func(rawUTF8 string) string {
+        var quotedString strings.Builder
+        quotedString.WriteByte('"')
+      CoreLoop:
+        for _, c := range []byte(rawUTF8) {
+            // Is this within the JSON standard escapes?
+            for i, esc := range binaryEscapes {
+                if esc == c {
+                    quotedString.WriteByte('\\')
+                    quotedString.WriteByte(asciiEscapes[i])
+                    continue CoreLoop
+                }
+            }
+            if c < 0x20 {
+                // Other ASCII control characters must be escaped with \uhhhh
+                quotedString.WriteString(fmt.Sprintf("\\u%04x", c))         
+            } else {
+                quotedString.WriteByte(c)
+            }
+        }
+        quotedString.WriteByte('"')
+        return quotedString.String()
+    }
+
+    parseQuotedString = func() string {
+        var rawString strings.Builder
+      CoreLoop:
+        for globalError == nil {
+            var c byte
+            if index < jsonDataLength {
+                c = jsonData[index]
+                index++
+            } else {
+                nextChar()
+                break
+            }
+            if (c == '"') {
+                break;
+            }
+            if c < ' ' {
+                setError("Unterminated string literal")
+            } else if c == '\\' {
+                // Escape sequence
+                c = nextChar()
+                if c == 'u' {
+                    // The \u escape
+                    firstUTF16 := getUEscape()
+                    if utf16.IsSurrogate(firstUTF16) {
+                        // If the first UTF-16 code unit has a certain value there must be
+                        // another succeeding UTF-16 code unit as well
+                        if nextChar() != '\\' || nextChar() != 'u' {
+                            setError("Missing surrogate")
+                        } else {
+                            // Output the UTF-32 code point as UTF-8
+                            rawString.WriteRune(utf16.DecodeRune(firstUTF16, getUEscape()))
+                        }
+                    } else {
+                        // Single UTF-16 code identical to UTF-32.  Output as UTF-8
+                        rawString.WriteRune(firstUTF16)
+                    }
+                } else if c == '/' {
+                    // Benign but useless escape
+                    rawString.WriteByte('/')
+                } else {
+                    // The JSON standard escapes
+                    for i, esc := range asciiEscapes {
+                        if esc == c {
+                            rawString.WriteByte(binaryEscapes[i])
+                            continue CoreLoop
+                        }
+                    }
+                    setError("Unexpected escape: \\" + string(c))
+                }
+            } else {
+                // Just an ordinary ASCII character alternatively a UTF-8 byte
+                // outside of ASCII.
+                // Note that properly formatted UTF-8 never clashes with ASCII
+                // making byte per byte search for ASCII break characters work
+                // as expected.
+                rawString.WriteByte(c)
+            }
+        }
+        return rawString.String()
+    }
+
+    parseSimpleType = func() string {
+        var token strings.Builder
+        index--
+        for globalError == nil {
+            c := testNextNonWhiteSpaceChar()
+            if c == ',' || c == ']' || c == '}' {
+                break;
+            }
+            c = nextChar()
+            if isWhiteSpace(c) {
+                break
+            }
+            token.WriteByte(c)
+        }
+        if token.Len() == 0 {
+            setError("Missing argument")
+        }
+        value := token.String()
+        // Is it a JSON literal?
+        for _, literal := range literals {
+            if literal == value {
+                return literal
+            }
+        }
+        // Apparently not so we assume that it is a I-JSON number
+        ieeeF64, err := strconv.ParseFloat(value, 64)
+        checkError(err)
+        value, err = NumberToJSON(ieeeF64)
+        checkError(err)
+        return value
+    }
+
+    parseElement = func() string {
+        switch scan() {
+            case '{':
+                return parseObject()
+            case '"':
+                return decorateString(parseQuotedString())
+            case '[':
+                return parseArray()
+            default:
+                return parseSimpleType()
+        }
+    }
+
+    parseArray = func() string {
+        var arrayData strings.Builder
+        arrayData.WriteByte('[')
+        var next bool = false
+        for globalError == nil && testNextNonWhiteSpaceChar() != ']' {
+            if next {
+                scanFor(',')
+                arrayData.WriteByte(',')
+            } else {
+                next = true
+            }
+            arrayData.WriteString(parseElement())
+        }
+        scan()
+        arrayData.WriteByte(']')
+        return arrayData.String()
+    }
+
+    lexicographicallyPrecedes := func(sortKey []uint16, e *list.Element) bool {
+        // Find the minimum length of the sortKeys
+        oldSortKey := e.Value.(nameValueType).sortKey
+        minLength := len(oldSortKey)
+        if minLength > len(sortKey) {
+            minLength = len(sortKey)
+        }
+        for q := 0; q < minLength; q++ {
+            diff := int(sortKey[q]) - int(oldSortKey[q])
+            if diff < 0 {
+                // Smaller => Precedes
+                return true
+            } else if diff > 0 {
+                // Bigger => No match
+                return false
+            }
+            // Still equal => Continue
+        }
+        // The sortKeys compared equal up to minLength
+        if len(sortKey) < len(oldSortKey) {
+            // Shorter => Precedes
+            return true
+        }
+        if len(sortKey) == len(oldSortKey) {
+            setError("Duplicate key: " + e.Value.(nameValueType).name)
+        }
+        // Longer => No match
+        return false
+    }
+
+    parseObject = func() string {
+        nameValueList := list.New()
+        var next bool = false
+      CoreLoop:
+        for globalError == nil && testNextNonWhiteSpaceChar() != '}' {
+            if next {
+                scanFor(',')
+            }
+            next = true
+            scanFor('"')
+            rawUTF8 := parseQuotedString()
+            if globalError != nil {
+                break;
+            }
+            // Sort keys on UTF-16 code units
+            // Since UTF-8 doesn't have endianess this is just a value transformation
+            // In the Go case the transformation is UTF-8 => UTF-32 => UTF-16
+            sortKey := utf16.Encode([]rune(rawUTF8))
+            scanFor(':')
+            nameValue := nameValueType{rawUTF8, sortKey, parseElement()}
+            for e := nameValueList.Front(); e != nil; e = e.Next() {
+                // Check if the key is smaller than a previous key
+                if lexicographicallyPrecedes(sortKey, e) {
+                    // Precedes => Insert before and exit sorting
+                    nameValueList.InsertBefore(nameValue, e)
+                    continue CoreLoop
+                }
+                // Continue searching for a possibly succeeding sortKey
+                // (which is straightforward since the list is ordered)
+            }
+            // The sortKey is either the first or is succeeding all previous sortKeys
+            nameValueList.PushBack(nameValue)
+        }
+        // Scan away '}'
+        scan()
+        // Now everything is sorted so we can properly serialize the object
+        var objectData strings.Builder
+        objectData.WriteByte('{')
+        next = false
+        for e := nameValueList.Front(); e != nil; e = e.Next() {
+            if next {
+                objectData.WriteByte(',')
+            }
+            next = true
+            nameValue := e.Value.(nameValueType)
+            objectData.WriteString(decorateString(nameValue.name))
+            objectData.WriteByte(':')
+            objectData.WriteString(nameValue.value)
+        }
+        objectData.WriteByte('}')
+        return objectData.String()
+    }
+
+    /////////////////////////////////////////////////
+    // This is where Transform actually begins...  //
+    /////////////////////////////////////////////////
+    var transformed string
+
+    if testNextNonWhiteSpaceChar() == '[' {
+        scan()
+        transformed = parseArray()
+    } else {
+        scanFor('{')
+        transformed = parseObject()
+    }
+    for index < jsonDataLength {
+        if !isWhiteSpace(jsonData[index]) {
+            setError("Improperly terminated JSON object")
+            break;
+        }
+        index++
+    }
+    return []byte(transformed), globalError
+}
\ No newline at end of file
diff --git a/vendor/github.com/docker/docker/api/types/filters/parse.go b/vendor/github.com/docker/docker/api/types/filters/parse.go
index 4bc91cffd6..63db4c617b 100644
--- a/vendor/github.com/docker/docker/api/types/filters/parse.go
+++ b/vendor/github.com/docker/docker/api/types/filters/parse.go
@@ -48,7 +48,7 @@ func (args Args) Keys() []string {
 // MarshalJSON returns a JSON byte representation of the Args
 func (args Args) MarshalJSON() ([]byte, error) {
 	if len(args.fields) == 0 {
-		return []byte{}, nil
+		return []byte("{}"), nil
 	}
 	return json.Marshal(args.fields)
 }
@@ -106,9 +106,6 @@ func FromJSON(p string) (Args, error) {
 
 // UnmarshalJSON populates the Args from JSON encode bytes
 func (args Args) UnmarshalJSON(raw []byte) error {
-	if len(raw) == 0 {
-		return nil
-	}
 	return json.Unmarshal(raw, &args.fields)
 }
 
diff --git a/vendor/github.com/go-jose/go-jose/v3/.gitignore b/vendor/github.com/go-jose/go-jose/v3/.gitignore
new file mode 100644
index 0000000000..eb29ebaefd
--- /dev/null
+++ b/vendor/github.com/go-jose/go-jose/v3/.gitignore
@@ -0,0 +1,2 @@
+jose-util/jose-util
+jose-util.t.err
\ No newline at end of file
diff --git a/vendor/github.com/go-jose/go-jose/v3/.golangci.yml b/vendor/github.com/go-jose/go-jose/v3/.golangci.yml
new file mode 100644
index 0000000000..2a577a8f95
--- /dev/null
+++ b/vendor/github.com/go-jose/go-jose/v3/.golangci.yml
@@ -0,0 +1,53 @@
+# https://github.com/golangci/golangci-lint
+
+run:
+  skip-files:
+    - doc_test.go
+  modules-download-mode: readonly
+
+linters:
+  enable-all: true
+  disable:
+    - gochecknoglobals
+    - goconst
+    - lll
+    - maligned
+    - nakedret
+    - scopelint
+    - unparam
+    - funlen # added in 1.18 (requires go-jose changes before it can be enabled)
+
+linters-settings:
+  gocyclo:
+    min-complexity: 35
+
+issues:
+  exclude-rules:
+    - text: "don't use ALL_CAPS in Go names"
+      linters:
+        - golint
+    - text: "hardcoded credentials"
+      linters:
+        - gosec
+    - text: "weak cryptographic primitive"
+      linters:
+        - gosec
+    - path: json/
+      linters:
+        - dupl
+        - errcheck
+        - gocritic
+        - gocyclo
+        - golint
+        - govet
+        - ineffassign
+        - staticcheck
+        - structcheck
+        - stylecheck
+        - unused
+    - path: _test\.go
+      linters:
+        - scopelint
+    - path: jwk.go
+      linters:
+        - gocyclo
diff --git a/vendor/github.com/go-jose/go-jose/v3/.travis.yml b/vendor/github.com/go-jose/go-jose/v3/.travis.yml
new file mode 100644
index 0000000000..48de631b00
--- /dev/null
+++ b/vendor/github.com/go-jose/go-jose/v3/.travis.yml
@@ -0,0 +1,33 @@
+language: go
+
+matrix:
+  fast_finish: true
+  allow_failures:
+    - go: tip
+
+go:
+  - "1.13.x"
+  - "1.14.x"
+  - tip
+
+before_script:
+  - export PATH=$HOME/.local/bin:$PATH
+
+before_install:
+  - go get -u github.com/mattn/goveralls github.com/wadey/gocovmerge
+  - curl -sfL https://install.goreleaser.com/github.com/golangci/golangci-lint.sh | sh -s -- -b $(go env GOPATH)/bin v1.18.0
+  - pip install cram --user
+
+script:
+  - go test -v -covermode=count -coverprofile=profile.cov .
+  - go test -v -covermode=count -coverprofile=cryptosigner/profile.cov ./cryptosigner
+  - go test -v -covermode=count -coverprofile=cipher/profile.cov ./cipher
+  - go test -v -covermode=count -coverprofile=jwt/profile.cov ./jwt
+  - go test -v ./json  # no coverage for forked encoding/json package
+  - golangci-lint run
+  - cd jose-util && go build && PATH=$PWD:$PATH cram -v jose-util.t # cram tests jose-util
+  - cd ..
+
+after_success:
+  - gocovmerge *.cov */*.cov > merged.coverprofile
+  - goveralls -coverprofile merged.coverprofile -service=travis-ci
diff --git a/vendor/github.com/go-jose/go-jose/v3/BUG-BOUNTY.md b/vendor/github.com/go-jose/go-jose/v3/BUG-BOUNTY.md
new file mode 100644
index 0000000000..3305db0f65
--- /dev/null
+++ b/vendor/github.com/go-jose/go-jose/v3/BUG-BOUNTY.md
@@ -0,0 +1,10 @@
+Serious about security
+======================
+
+Square recognizes the important contributions the security research community
+can make. We therefore encourage reporting security issues with the code
+contained in this repository.
+
+If you believe you have discovered a security vulnerability, please follow the
+guidelines at <https://bugcrowd.com/squareopensource>.
+
diff --git a/vendor/github.com/go-jose/go-jose/v3/CONTRIBUTING.md b/vendor/github.com/go-jose/go-jose/v3/CONTRIBUTING.md
new file mode 100644
index 0000000000..b63e1f8fee
--- /dev/null
+++ b/vendor/github.com/go-jose/go-jose/v3/CONTRIBUTING.md
@@ -0,0 +1,15 @@
+# Contributing
+
+If you would like to contribute code to go-jose you can do so through GitHub by
+forking the repository and sending a pull request.
+
+When submitting code, please make every effort to follow existing conventions
+and style in order to keep the code as readable as possible. Please also make
+sure all tests pass by running `go test`, and format your code with `go fmt`.
+We also recommend using `golint` and `errcheck`.
+
+Before your code can be accepted into the project you must also sign the
+Individual Contributor License Agreement.  We use [cla-assistant.io][1] and you
+will be prompted to sign once a pull request is opened.
+
+[1]: https://cla-assistant.io/
diff --git a/vendor/github.com/go-jose/go-jose/v3/LICENSE b/vendor/github.com/go-jose/go-jose/v3/LICENSE
new file mode 100644
index 0000000000..d645695673
--- /dev/null
+++ b/vendor/github.com/go-jose/go-jose/v3/LICENSE
@@ -0,0 +1,202 @@
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
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+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
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+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
+      replaced with your own identifying information. (Don't include
+      the brackets!)  The text should be enclosed in the appropriate
+      comment syntax for the file format. We also recommend that a
+      file or class name and description of purpose be included on the
+      same "printed page" as the copyright notice for easier
+      identification within third-party archives.
+
+   Copyright [yyyy] [name of copyright owner]
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
diff --git a/vendor/github.com/go-jose/go-jose/v3/README.md b/vendor/github.com/go-jose/go-jose/v3/README.md
new file mode 100644
index 0000000000..b90c7e5c6b
--- /dev/null
+++ b/vendor/github.com/go-jose/go-jose/v3/README.md
@@ -0,0 +1,122 @@
+# Go JOSE
+
+[![godoc](http://img.shields.io/badge/godoc-jose_package-blue.svg?style=flat)](https://godoc.org/gopkg.in/go-jose/go-jose.v2)
+[![godoc](http://img.shields.io/badge/godoc-jwt_package-blue.svg?style=flat)](https://godoc.org/gopkg.in/go-jose/go-jose.v2/jwt)
+[![license](http://img.shields.io/badge/license-apache_2.0-blue.svg?style=flat)](https://raw.githubusercontent.com/go-jose/go-jose/master/LICENSE)
+[![build](https://travis-ci.org/go-jose/go-jose.svg?branch=master)](https://travis-ci.org/go-jose/go-jose)
+[![coverage](https://coveralls.io/repos/github/go-jose/go-jose/badge.svg?branch=master)](https://coveralls.io/r/go-jose/go-jose)
+
+Package jose aims to provide an implementation of the Javascript Object Signing
+and Encryption set of standards. This includes support for JSON Web Encryption,
+JSON Web Signature, and JSON Web Token standards.
+
+**Disclaimer**: This library contains encryption software that is subject to
+the U.S. Export Administration Regulations. You may not export, re-export,
+transfer or download this code or any part of it in violation of any United
+States law, directive or regulation. In particular this software may not be
+exported or re-exported in any form or on any media to Iran, North Sudan,
+Syria, Cuba, or North Korea, or to denied persons or entities mentioned on any
+US maintained blocked list.
+
+## Overview
+
+The implementation follows the
+[JSON Web Encryption](http://dx.doi.org/10.17487/RFC7516) (RFC 7516),
+[JSON Web Signature](http://dx.doi.org/10.17487/RFC7515) (RFC 7515), and
+[JSON Web Token](http://dx.doi.org/10.17487/RFC7519) (RFC 7519) specifications.
+Tables of supported algorithms are shown below. The library supports both
+the compact and JWS/JWE JSON Serialization formats, and has optional support for
+multiple recipients. It also comes with a small command-line utility
+([`jose-util`](https://github.com/go-jose/go-jose/tree/master/jose-util))
+for dealing with JOSE messages in a shell.
+
+**Note**: We use a forked version of the `encoding/json` package from the Go
+standard library which uses case-sensitive matching for member names (instead
+of [case-insensitive matching](https://www.ietf.org/mail-archive/web/json/current/msg03763.html)).
+This is to avoid differences in interpretation of messages between go-jose and
+libraries in other languages.
+
+### Versions
+
+[Version 2](https://gopkg.in/go-jose/go-jose.v2)
+([branch](https://github.com/go-jose/go-jose/tree/v2),
+[doc](https://godoc.org/gopkg.in/go-jose/go-jose.v2)) is the current stable version:
+
+    import "gopkg.in/go-jose/go-jose.v2"
+
+[Version 3](https://github.com/go-jose/go-jose)
+([branch](https://github.com/go-jose/go-jose/tree/master),
+[doc](https://godoc.org/github.com/go-jose/go-jose)) is the under development/unstable version (not released yet):
+
+    import "github.com/go-jose/go-jose/v3"
+
+All new feature development takes place on the `master` branch, which we are
+preparing to release as version 3 soon. Version 2 will continue to receive
+critical bug and security fixes. Note that starting with version 3 we are
+using Go modules for versioning instead of `gopkg.in` as before. Version 3 also will require Go version 1.13 or higher.
+
+Version 1 (on the `v1` branch) is frozen and not supported anymore.
+
+### Supported algorithms
+
+See below for a table of supported algorithms. Algorithm identifiers match
+the names in the [JSON Web Algorithms](http://dx.doi.org/10.17487/RFC7518)
+standard where possible. The Godoc reference has a list of constants.
+
+ Key encryption             | Algorithm identifier(s)
+ :------------------------- | :------------------------------
+ RSA-PKCS#1v1.5             | RSA1_5
+ RSA-OAEP                   | RSA-OAEP, RSA-OAEP-256
+ AES key wrap               | A128KW, A192KW, A256KW
+ AES-GCM key wrap           | A128GCMKW, A192GCMKW, A256GCMKW
+ ECDH-ES + AES key wrap     | ECDH-ES+A128KW, ECDH-ES+A192KW, ECDH-ES+A256KW
+ ECDH-ES (direct)           | ECDH-ES<sup>1</sup>
+ Direct encryption          | dir<sup>1</sup>
+
+<sup>1. Not supported in multi-recipient mode</sup>
+
+ Signing / MAC              | Algorithm identifier(s)
+ :------------------------- | :------------------------------
+ RSASSA-PKCS#1v1.5          | RS256, RS384, RS512
+ RSASSA-PSS                 | PS256, PS384, PS512
+ HMAC                       | HS256, HS384, HS512
+ ECDSA                      | ES256, ES384, ES512
+ Ed25519                    | EdDSA<sup>2</sup>
+
+<sup>2. Only available in version 2 of the package</sup>
+
+ Content encryption         | Algorithm identifier(s)
+ :------------------------- | :------------------------------
+ AES-CBC+HMAC               | A128CBC-HS256, A192CBC-HS384, A256CBC-HS512
+ AES-GCM                    | A128GCM, A192GCM, A256GCM
+
+ Compression                | Algorithm identifiers(s)
+ :------------------------- | -------------------------------
+ DEFLATE (RFC 1951)         | DEF
+
+### Supported key types
+
+See below for a table of supported key types. These are understood by the
+library, and can be passed to corresponding functions such as `NewEncrypter` or
+`NewSigner`. Each of these keys can also be wrapped in a JWK if desired, which
+allows attaching a key id.
+
+ Algorithm(s)               | Corresponding types
+ :------------------------- | -------------------------------
+ RSA                        | *[rsa.PublicKey](http://golang.org/pkg/crypto/rsa/#PublicKey), *[rsa.PrivateKey](http://golang.org/pkg/crypto/rsa/#PrivateKey)
+ ECDH, ECDSA                | *[ecdsa.PublicKey](http://golang.org/pkg/crypto/ecdsa/#PublicKey), *[ecdsa.PrivateKey](http://golang.org/pkg/crypto/ecdsa/#PrivateKey)
+ EdDSA<sup>1</sup>          | [ed25519.PublicKey](https://godoc.org/pkg/crypto/ed25519#PublicKey), [ed25519.PrivateKey](https://godoc.org/pkg/crypto/ed25519#PrivateKey)
+ AES, HMAC                  | []byte
+
+<sup>1. Only available in version 2 or later of the package</sup>
+
+## Examples
+
+[![godoc](http://img.shields.io/badge/godoc-jose_package-blue.svg?style=flat)](https://godoc.org/gopkg.in/go-jose/go-jose.v2)
+[![godoc](http://img.shields.io/badge/godoc-jwt_package-blue.svg?style=flat)](https://godoc.org/gopkg.in/go-jose/go-jose.v2/jwt)
+
+Examples can be found in the Godoc
+reference for this package. The
+[`jose-util`](https://github.com/go-jose/go-jose/tree/master/jose-util)
+subdirectory also contains a small command-line utility which might be useful
+as an example as well.
diff --git a/vendor/github.com/go-jose/go-jose/v3/asymmetric.go b/vendor/github.com/go-jose/go-jose/v3/asymmetric.go
new file mode 100644
index 0000000000..78abc32683
--- /dev/null
+++ b/vendor/github.com/go-jose/go-jose/v3/asymmetric.go
@@ -0,0 +1,592 @@
+/*-
+ * Copyright 2014 Square Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package jose
+
+import (
+	"crypto"
+	"crypto/aes"
+	"crypto/ecdsa"
+	"crypto/ed25519"
+	"crypto/rand"
+	"crypto/rsa"
+	"crypto/sha1"
+	"crypto/sha256"
+	"errors"
+	"fmt"
+	"math/big"
+
+	josecipher "github.com/go-jose/go-jose/v3/cipher"
+	"github.com/go-jose/go-jose/v3/json"
+)
+
+// A generic RSA-based encrypter/verifier
+type rsaEncrypterVerifier struct {
+	publicKey *rsa.PublicKey
+}
+
+// A generic RSA-based decrypter/signer
+type rsaDecrypterSigner struct {
+	privateKey *rsa.PrivateKey
+}
+
+// A generic EC-based encrypter/verifier
+type ecEncrypterVerifier struct {
+	publicKey *ecdsa.PublicKey
+}
+
+type edEncrypterVerifier struct {
+	publicKey ed25519.PublicKey
+}
+
+// A key generator for ECDH-ES
+type ecKeyGenerator struct {
+	size      int
+	algID     string
+	publicKey *ecdsa.PublicKey
+}
+
+// A generic EC-based decrypter/signer
+type ecDecrypterSigner struct {
+	privateKey *ecdsa.PrivateKey
+}
+
+type edDecrypterSigner struct {
+	privateKey ed25519.PrivateKey
+}
+
+// newRSARecipient creates recipientKeyInfo based on the given key.
+func newRSARecipient(keyAlg KeyAlgorithm, publicKey *rsa.PublicKey) (recipientKeyInfo, error) {
+	// Verify that key management algorithm is supported by this encrypter
+	switch keyAlg {
+	case RSA1_5, RSA_OAEP, RSA_OAEP_256:
+	default:
+		return recipientKeyInfo{}, ErrUnsupportedAlgorithm
+	}
+
+	if publicKey == nil {
+		return recipientKeyInfo{}, errors.New("invalid public key")
+	}
+
+	return recipientKeyInfo{
+		keyAlg: keyAlg,
+		keyEncrypter: &rsaEncrypterVerifier{
+			publicKey: publicKey,
+		},
+	}, nil
+}
+
+// newRSASigner creates a recipientSigInfo based on the given key.
+func newRSASigner(sigAlg SignatureAlgorithm, privateKey *rsa.PrivateKey) (recipientSigInfo, error) {
+	// Verify that key management algorithm is supported by this encrypter
+	switch sigAlg {
+	case RS256, RS384, RS512, PS256, PS384, PS512:
+	default:
+		return recipientSigInfo{}, ErrUnsupportedAlgorithm
+	}
+
+	if privateKey == nil {
+		return recipientSigInfo{}, errors.New("invalid private key")
+	}
+
+	return recipientSigInfo{
+		sigAlg: sigAlg,
+		publicKey: staticPublicKey(&JSONWebKey{
+			Key: privateKey.Public(),
+		}),
+		signer: &rsaDecrypterSigner{
+			privateKey: privateKey,
+		},
+	}, nil
+}
+
+func newEd25519Signer(sigAlg SignatureAlgorithm, privateKey ed25519.PrivateKey) (recipientSigInfo, error) {
+	if sigAlg != EdDSA {
+		return recipientSigInfo{}, ErrUnsupportedAlgorithm
+	}
+
+	if privateKey == nil {
+		return recipientSigInfo{}, errors.New("invalid private key")
+	}
+	return recipientSigInfo{
+		sigAlg: sigAlg,
+		publicKey: staticPublicKey(&JSONWebKey{
+			Key: privateKey.Public(),
+		}),
+		signer: &edDecrypterSigner{
+			privateKey: privateKey,
+		},
+	}, nil
+}
+
+// newECDHRecipient creates recipientKeyInfo based on the given key.
+func newECDHRecipient(keyAlg KeyAlgorithm, publicKey *ecdsa.PublicKey) (recipientKeyInfo, error) {
+	// Verify that key management algorithm is supported by this encrypter
+	switch keyAlg {
+	case ECDH_ES, ECDH_ES_A128KW, ECDH_ES_A192KW, ECDH_ES_A256KW:
+	default:
+		return recipientKeyInfo{}, ErrUnsupportedAlgorithm
+	}
+
+	if publicKey == nil || !publicKey.Curve.IsOnCurve(publicKey.X, publicKey.Y) {
+		return recipientKeyInfo{}, errors.New("invalid public key")
+	}
+
+	return recipientKeyInfo{
+		keyAlg: keyAlg,
+		keyEncrypter: &ecEncrypterVerifier{
+			publicKey: publicKey,
+		},
+	}, nil
+}
+
+// newECDSASigner creates a recipientSigInfo based on the given key.
+func newECDSASigner(sigAlg SignatureAlgorithm, privateKey *ecdsa.PrivateKey) (recipientSigInfo, error) {
+	// Verify that key management algorithm is supported by this encrypter
+	switch sigAlg {
+	case ES256, ES384, ES512:
+	default:
+		return recipientSigInfo{}, ErrUnsupportedAlgorithm
+	}
+
+	if privateKey == nil {
+		return recipientSigInfo{}, errors.New("invalid private key")
+	}
+
+	return recipientSigInfo{
+		sigAlg: sigAlg,
+		publicKey: staticPublicKey(&JSONWebKey{
+			Key: privateKey.Public(),
+		}),
+		signer: &ecDecrypterSigner{
+			privateKey: privateKey,
+		},
+	}, nil
+}
+
+// Encrypt the given payload and update the object.
+func (ctx rsaEncrypterVerifier) encryptKey(cek []byte, alg KeyAlgorithm) (recipientInfo, error) {
+	encryptedKey, err := ctx.encrypt(cek, alg)
+	if err != nil {
+		return recipientInfo{}, err
+	}
+
+	return recipientInfo{
+		encryptedKey: encryptedKey,
+		header:       &rawHeader{},
+	}, nil
+}
+
+// Encrypt the given payload. Based on the key encryption algorithm,
+// this will either use RSA-PKCS1v1.5 or RSA-OAEP (with SHA-1 or SHA-256).
+func (ctx rsaEncrypterVerifier) encrypt(cek []byte, alg KeyAlgorithm) ([]byte, error) {
+	switch alg {
+	case RSA1_5:
+		return rsa.EncryptPKCS1v15(RandReader, ctx.publicKey, cek)
+	case RSA_OAEP:
+		return rsa.EncryptOAEP(sha1.New(), RandReader, ctx.publicKey, cek, []byte{})
+	case RSA_OAEP_256:
+		return rsa.EncryptOAEP(sha256.New(), RandReader, ctx.publicKey, cek, []byte{})
+	}
+
+	return nil, ErrUnsupportedAlgorithm
+}
+
+// Decrypt the given payload and return the content encryption key.
+func (ctx rsaDecrypterSigner) decryptKey(headers rawHeader, recipient *recipientInfo, generator keyGenerator) ([]byte, error) {
+	return ctx.decrypt(recipient.encryptedKey, headers.getAlgorithm(), generator)
+}
+
+// Decrypt the given payload. Based on the key encryption algorithm,
+// this will either use RSA-PKCS1v1.5 or RSA-OAEP (with SHA-1 or SHA-256).
+func (ctx rsaDecrypterSigner) decrypt(jek []byte, alg KeyAlgorithm, generator keyGenerator) ([]byte, error) {
+	// Note: The random reader on decrypt operations is only used for blinding,
+	// so stubbing is meanlingless (hence the direct use of rand.Reader).
+	switch alg {
+	case RSA1_5:
+		defer func() {
+			// DecryptPKCS1v15SessionKey sometimes panics on an invalid payload
+			// because of an index out of bounds error, which we want to ignore.
+			// This has been fixed in Go 1.3.1 (released 2014/08/13), the recover()
+			// only exists for preventing crashes with unpatched versions.
+			// See: https://groups.google.com/forum/#!topic/golang-dev/7ihX6Y6kx9k
+			// See: https://code.google.com/p/go/source/detail?r=58ee390ff31602edb66af41ed10901ec95904d33
+			_ = recover()
+		}()
+
+		// Perform some input validation.
+		keyBytes := ctx.privateKey.PublicKey.N.BitLen() / 8
+		if keyBytes != len(jek) {
+			// Input size is incorrect, the encrypted payload should always match
+			// the size of the public modulus (e.g. using a 2048 bit key will
+			// produce 256 bytes of output). Reject this since it's invalid input.
+			return nil, ErrCryptoFailure
+		}
+
+		cek, _, err := generator.genKey()
+		if err != nil {
+			return nil, ErrCryptoFailure
+		}
+
+		// When decrypting an RSA-PKCS1v1.5 payload, we must take precautions to
+		// prevent chosen-ciphertext attacks as described in RFC 3218, "Preventing
+		// the Million Message Attack on Cryptographic Message Syntax". We are
+		// therefore deliberately ignoring errors here.
+		_ = rsa.DecryptPKCS1v15SessionKey(rand.Reader, ctx.privateKey, jek, cek)
+
+		return cek, nil
+	case RSA_OAEP:
+		// Use rand.Reader for RSA blinding
+		return rsa.DecryptOAEP(sha1.New(), rand.Reader, ctx.privateKey, jek, []byte{})
+	case RSA_OAEP_256:
+		// Use rand.Reader for RSA blinding
+		return rsa.DecryptOAEP(sha256.New(), rand.Reader, ctx.privateKey, jek, []byte{})
+	}
+
+	return nil, ErrUnsupportedAlgorithm
+}
+
+// Sign the given payload
+func (ctx rsaDecrypterSigner) signPayload(payload []byte, alg SignatureAlgorithm) (Signature, error) {
+	var hash crypto.Hash
+
+	switch alg {
+	case RS256, PS256:
+		hash = crypto.SHA256
+	case RS384, PS384:
+		hash = crypto.SHA384
+	case RS512, PS512:
+		hash = crypto.SHA512
+	default:
+		return Signature{}, ErrUnsupportedAlgorithm
+	}
+
+	hasher := hash.New()
+
+	// According to documentation, Write() on hash never fails
+	_, _ = hasher.Write(payload)
+	hashed := hasher.Sum(nil)
+
+	var out []byte
+	var err error
+
+	switch alg {
+	case RS256, RS384, RS512:
+		out, err = rsa.SignPKCS1v15(RandReader, ctx.privateKey, hash, hashed)
+	case PS256, PS384, PS512:
+		out, err = rsa.SignPSS(RandReader, ctx.privateKey, hash, hashed, &rsa.PSSOptions{
+			SaltLength: rsa.PSSSaltLengthEqualsHash,
+		})
+	}
+
+	if err != nil {
+		return Signature{}, err
+	}
+
+	return Signature{
+		Signature: out,
+		protected: &rawHeader{},
+	}, nil
+}
+
+// Verify the given payload
+func (ctx rsaEncrypterVerifier) verifyPayload(payload []byte, signature []byte, alg SignatureAlgorithm) error {
+	var hash crypto.Hash
+
+	switch alg {
+	case RS256, PS256:
+		hash = crypto.SHA256
+	case RS384, PS384:
+		hash = crypto.SHA384
+	case RS512, PS512:
+		hash = crypto.SHA512
+	default:
+		return ErrUnsupportedAlgorithm
+	}
+
+	hasher := hash.New()
+
+	// According to documentation, Write() on hash never fails
+	_, _ = hasher.Write(payload)
+	hashed := hasher.Sum(nil)
+
+	switch alg {
+	case RS256, RS384, RS512:
+		return rsa.VerifyPKCS1v15(ctx.publicKey, hash, hashed, signature)
+	case PS256, PS384, PS512:
+		return rsa.VerifyPSS(ctx.publicKey, hash, hashed, signature, nil)
+	}
+
+	return ErrUnsupportedAlgorithm
+}
+
+// Encrypt the given payload and update the object.
+func (ctx ecEncrypterVerifier) encryptKey(cek []byte, alg KeyAlgorithm) (recipientInfo, error) {
+	switch alg {
+	case ECDH_ES:
+		// ECDH-ES mode doesn't wrap a key, the shared secret is used directly as the key.
+		return recipientInfo{
+			header: &rawHeader{},
+		}, nil
+	case ECDH_ES_A128KW, ECDH_ES_A192KW, ECDH_ES_A256KW:
+	default:
+		return recipientInfo{}, ErrUnsupportedAlgorithm
+	}
+
+	generator := ecKeyGenerator{
+		algID:     string(alg),
+		publicKey: ctx.publicKey,
+	}
+
+	switch alg {
+	case ECDH_ES_A128KW:
+		generator.size = 16
+	case ECDH_ES_A192KW:
+		generator.size = 24
+	case ECDH_ES_A256KW:
+		generator.size = 32
+	}
+
+	kek, header, err := generator.genKey()
+	if err != nil {
+		return recipientInfo{}, err
+	}
+
+	block, err := aes.NewCipher(kek)
+	if err != nil {
+		return recipientInfo{}, err
+	}
+
+	jek, err := josecipher.KeyWrap(block, cek)
+	if err != nil {
+		return recipientInfo{}, err
+	}
+
+	return recipientInfo{
+		encryptedKey: jek,
+		header:       &header,
+	}, nil
+}
+
+// Get key size for EC key generator
+func (ctx ecKeyGenerator) keySize() int {
+	return ctx.size
+}
+
+// Get a content encryption key for ECDH-ES
+func (ctx ecKeyGenerator) genKey() ([]byte, rawHeader, error) {
+	priv, err := ecdsa.GenerateKey(ctx.publicKey.Curve, RandReader)
+	if err != nil {
+		return nil, rawHeader{}, err
+	}
+
+	out := josecipher.DeriveECDHES(ctx.algID, []byte{}, []byte{}, priv, ctx.publicKey, ctx.size)
+
+	b, err := json.Marshal(&JSONWebKey{
+		Key: &priv.PublicKey,
+	})
+	if err != nil {
+		return nil, nil, err
+	}
+
+	headers := rawHeader{
+		headerEPK: makeRawMessage(b),
+	}
+
+	return out, headers, nil
+}
+
+// Decrypt the given payload and return the content encryption key.
+func (ctx ecDecrypterSigner) decryptKey(headers rawHeader, recipient *recipientInfo, generator keyGenerator) ([]byte, error) {
+	epk, err := headers.getEPK()
+	if err != nil {
+		return nil, errors.New("go-jose/go-jose: invalid epk header")
+	}
+	if epk == nil {
+		return nil, errors.New("go-jose/go-jose: missing epk header")
+	}
+
+	publicKey, ok := epk.Key.(*ecdsa.PublicKey)
+	if publicKey == nil || !ok {
+		return nil, errors.New("go-jose/go-jose: invalid epk header")
+	}
+
+	if !ctx.privateKey.Curve.IsOnCurve(publicKey.X, publicKey.Y) {
+		return nil, errors.New("go-jose/go-jose: invalid public key in epk header")
+	}
+
+	apuData, err := headers.getAPU()
+	if err != nil {
+		return nil, errors.New("go-jose/go-jose: invalid apu header")
+	}
+	apvData, err := headers.getAPV()
+	if err != nil {
+		return nil, errors.New("go-jose/go-jose: invalid apv header")
+	}
+
+	deriveKey := func(algID string, size int) []byte {
+		return josecipher.DeriveECDHES(algID, apuData.bytes(), apvData.bytes(), ctx.privateKey, publicKey, size)
+	}
+
+	var keySize int
+
+	algorithm := headers.getAlgorithm()
+	switch algorithm {
+	case ECDH_ES:
+		// ECDH-ES uses direct key agreement, no key unwrapping necessary.
+		return deriveKey(string(headers.getEncryption()), generator.keySize()), nil
+	case ECDH_ES_A128KW:
+		keySize = 16
+	case ECDH_ES_A192KW:
+		keySize = 24
+	case ECDH_ES_A256KW:
+		keySize = 32
+	default:
+		return nil, ErrUnsupportedAlgorithm
+	}
+
+	key := deriveKey(string(algorithm), keySize)
+	block, err := aes.NewCipher(key)
+	if err != nil {
+		return nil, err
+	}
+
+	return josecipher.KeyUnwrap(block, recipient.encryptedKey)
+}
+
+func (ctx edDecrypterSigner) signPayload(payload []byte, alg SignatureAlgorithm) (Signature, error) {
+	if alg != EdDSA {
+		return Signature{}, ErrUnsupportedAlgorithm
+	}
+
+	sig, err := ctx.privateKey.Sign(RandReader, payload, crypto.Hash(0))
+	if err != nil {
+		return Signature{}, err
+	}
+
+	return Signature{
+		Signature: sig,
+		protected: &rawHeader{},
+	}, nil
+}
+
+func (ctx edEncrypterVerifier) verifyPayload(payload []byte, signature []byte, alg SignatureAlgorithm) error {
+	if alg != EdDSA {
+		return ErrUnsupportedAlgorithm
+	}
+	ok := ed25519.Verify(ctx.publicKey, payload, signature)
+	if !ok {
+		return errors.New("go-jose/go-jose: ed25519 signature failed to verify")
+	}
+	return nil
+}
+
+// Sign the given payload
+func (ctx ecDecrypterSigner) signPayload(payload []byte, alg SignatureAlgorithm) (Signature, error) {
+	var expectedBitSize int
+	var hash crypto.Hash
+
+	switch alg {
+	case ES256:
+		expectedBitSize = 256
+		hash = crypto.SHA256
+	case ES384:
+		expectedBitSize = 384
+		hash = crypto.SHA384
+	case ES512:
+		expectedBitSize = 521
+		hash = crypto.SHA512
+	}
+
+	curveBits := ctx.privateKey.Curve.Params().BitSize
+	if expectedBitSize != curveBits {
+		return Signature{}, fmt.Errorf("go-jose/go-jose: expected %d bit key, got %d bits instead", expectedBitSize, curveBits)
+	}
+
+	hasher := hash.New()
+
+	// According to documentation, Write() on hash never fails
+	_, _ = hasher.Write(payload)
+	hashed := hasher.Sum(nil)
+
+	r, s, err := ecdsa.Sign(RandReader, ctx.privateKey, hashed)
+	if err != nil {
+		return Signature{}, err
+	}
+
+	keyBytes := curveBits / 8
+	if curveBits%8 > 0 {
+		keyBytes++
+	}
+
+	// We serialize the outputs (r and s) into big-endian byte arrays and pad
+	// them with zeros on the left to make sure the sizes work out. Both arrays
+	// must be keyBytes long, and the output must be 2*keyBytes long.
+	rBytes := r.Bytes()
+	rBytesPadded := make([]byte, keyBytes)
+	copy(rBytesPadded[keyBytes-len(rBytes):], rBytes)
+
+	sBytes := s.Bytes()
+	sBytesPadded := make([]byte, keyBytes)
+	copy(sBytesPadded[keyBytes-len(sBytes):], sBytes)
+
+	out := append(rBytesPadded, sBytesPadded...)
+
+	return Signature{
+		Signature: out,
+		protected: &rawHeader{},
+	}, nil
+}
+
+// Verify the given payload
+func (ctx ecEncrypterVerifier) verifyPayload(payload []byte, signature []byte, alg SignatureAlgorithm) error {
+	var keySize int
+	var hash crypto.Hash
+
+	switch alg {
+	case ES256:
+		keySize = 32
+		hash = crypto.SHA256
+	case ES384:
+		keySize = 48
+		hash = crypto.SHA384
+	case ES512:
+		keySize = 66
+		hash = crypto.SHA512
+	default:
+		return ErrUnsupportedAlgorithm
+	}
+
+	if len(signature) != 2*keySize {
+		return fmt.Errorf("go-jose/go-jose: invalid signature size, have %d bytes, wanted %d", len(signature), 2*keySize)
+	}
+
+	hasher := hash.New()
+
+	// According to documentation, Write() on hash never fails
+	_, _ = hasher.Write(payload)
+	hashed := hasher.Sum(nil)
+
+	r := big.NewInt(0).SetBytes(signature[:keySize])
+	s := big.NewInt(0).SetBytes(signature[keySize:])
+
+	match := ecdsa.Verify(ctx.publicKey, hashed, r, s)
+	if !match {
+		return errors.New("go-jose/go-jose: ecdsa signature failed to verify")
+	}
+
+	return nil
+}
diff --git a/vendor/github.com/go-jose/go-jose/v3/cipher/cbc_hmac.go b/vendor/github.com/go-jose/go-jose/v3/cipher/cbc_hmac.go
new file mode 100644
index 0000000000..af029cec0b
--- /dev/null
+++ b/vendor/github.com/go-jose/go-jose/v3/cipher/cbc_hmac.go
@@ -0,0 +1,196 @@
+/*-
+ * Copyright 2014 Square Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package josecipher
+
+import (
+	"bytes"
+	"crypto/cipher"
+	"crypto/hmac"
+	"crypto/sha256"
+	"crypto/sha512"
+	"crypto/subtle"
+	"encoding/binary"
+	"errors"
+	"hash"
+)
+
+const (
+	nonceBytes = 16
+)
+
+// NewCBCHMAC instantiates a new AEAD based on CBC+HMAC.
+func NewCBCHMAC(key []byte, newBlockCipher func([]byte) (cipher.Block, error)) (cipher.AEAD, error) {
+	keySize := len(key) / 2
+	integrityKey := key[:keySize]
+	encryptionKey := key[keySize:]
+
+	blockCipher, err := newBlockCipher(encryptionKey)
+	if err != nil {
+		return nil, err
+	}
+
+	var hash func() hash.Hash
+	switch keySize {
+	case 16:
+		hash = sha256.New
+	case 24:
+		hash = sha512.New384
+	case 32:
+		hash = sha512.New
+	}
+
+	return &cbcAEAD{
+		hash:         hash,
+		blockCipher:  blockCipher,
+		authtagBytes: keySize,
+		integrityKey: integrityKey,
+	}, nil
+}
+
+// An AEAD based on CBC+HMAC
+type cbcAEAD struct {
+	hash         func() hash.Hash
+	authtagBytes int
+	integrityKey []byte
+	blockCipher  cipher.Block
+}
+
+func (ctx *cbcAEAD) NonceSize() int {
+	return nonceBytes
+}
+
+func (ctx *cbcAEAD) Overhead() int {
+	// Maximum overhead is block size (for padding) plus auth tag length, where
+	// the length of the auth tag is equivalent to the key size.
+	return ctx.blockCipher.BlockSize() + ctx.authtagBytes
+}
+
+// Seal encrypts and authenticates the plaintext.
+func (ctx *cbcAEAD) Seal(dst, nonce, plaintext, data []byte) []byte {
+	// Output buffer -- must take care not to mangle plaintext input.
+	ciphertext := make([]byte, uint64(len(plaintext))+uint64(ctx.Overhead()))[:len(plaintext)]
+	copy(ciphertext, plaintext)
+	ciphertext = padBuffer(ciphertext, ctx.blockCipher.BlockSize())
+
+	cbc := cipher.NewCBCEncrypter(ctx.blockCipher, nonce)
+
+	cbc.CryptBlocks(ciphertext, ciphertext)
+	authtag := ctx.computeAuthTag(data, nonce, ciphertext)
+
+	ret, out := resize(dst, uint64(len(dst))+uint64(len(ciphertext))+uint64(len(authtag)))
+	copy(out, ciphertext)
+	copy(out[len(ciphertext):], authtag)
+
+	return ret
+}
+
+// Open decrypts and authenticates the ciphertext.
+func (ctx *cbcAEAD) Open(dst, nonce, ciphertext, data []byte) ([]byte, error) {
+	if len(ciphertext) < ctx.authtagBytes {
+		return nil, errors.New("go-jose/go-jose: invalid ciphertext (too short)")
+	}
+
+	offset := len(ciphertext) - ctx.authtagBytes
+	expectedTag := ctx.computeAuthTag(data, nonce, ciphertext[:offset])
+	match := subtle.ConstantTimeCompare(expectedTag, ciphertext[offset:])
+	if match != 1 {
+		return nil, errors.New("go-jose/go-jose: invalid ciphertext (auth tag mismatch)")
+	}
+
+	cbc := cipher.NewCBCDecrypter(ctx.blockCipher, nonce)
+
+	// Make copy of ciphertext buffer, don't want to modify in place
+	buffer := append([]byte{}, ciphertext[:offset]...)
+
+	if len(buffer)%ctx.blockCipher.BlockSize() > 0 {
+		return nil, errors.New("go-jose/go-jose: invalid ciphertext (invalid length)")
+	}
+
+	cbc.CryptBlocks(buffer, buffer)
+
+	// Remove padding
+	plaintext, err := unpadBuffer(buffer, ctx.blockCipher.BlockSize())
+	if err != nil {
+		return nil, err
+	}
+
+	ret, out := resize(dst, uint64(len(dst))+uint64(len(plaintext)))
+	copy(out, plaintext)
+
+	return ret, nil
+}
+
+// Compute an authentication tag
+func (ctx *cbcAEAD) computeAuthTag(aad, nonce, ciphertext []byte) []byte {
+	buffer := make([]byte, uint64(len(aad))+uint64(len(nonce))+uint64(len(ciphertext))+8)
+	n := 0
+	n += copy(buffer, aad)
+	n += copy(buffer[n:], nonce)
+	n += copy(buffer[n:], ciphertext)
+	binary.BigEndian.PutUint64(buffer[n:], uint64(len(aad))*8)
+
+	// According to documentation, Write() on hash.Hash never fails.
+	hmac := hmac.New(ctx.hash, ctx.integrityKey)
+	_, _ = hmac.Write(buffer)
+
+	return hmac.Sum(nil)[:ctx.authtagBytes]
+}
+
+// resize ensures that the given slice has a capacity of at least n bytes.
+// If the capacity of the slice is less than n, a new slice is allocated
+// and the existing data will be copied.
+func resize(in []byte, n uint64) (head, tail []byte) {
+	if uint64(cap(in)) >= n {
+		head = in[:n]
+	} else {
+		head = make([]byte, n)
+		copy(head, in)
+	}
+
+	tail = head[len(in):]
+	return
+}
+
+// Apply padding
+func padBuffer(buffer []byte, blockSize int) []byte {
+	missing := blockSize - (len(buffer) % blockSize)
+	ret, out := resize(buffer, uint64(len(buffer))+uint64(missing))
+	padding := bytes.Repeat([]byte{byte(missing)}, missing)
+	copy(out, padding)
+	return ret
+}
+
+// Remove padding
+func unpadBuffer(buffer []byte, blockSize int) ([]byte, error) {
+	if len(buffer)%blockSize != 0 {
+		return nil, errors.New("go-jose/go-jose: invalid padding")
+	}
+
+	last := buffer[len(buffer)-1]
+	count := int(last)
+
+	if count == 0 || count > blockSize || count > len(buffer) {
+		return nil, errors.New("go-jose/go-jose: invalid padding")
+	}
+
+	padding := bytes.Repeat([]byte{last}, count)
+	if !bytes.HasSuffix(buffer, padding) {
+		return nil, errors.New("go-jose/go-jose: invalid padding")
+	}
+
+	return buffer[:len(buffer)-count], nil
+}
diff --git a/vendor/github.com/go-jose/go-jose/v3/cipher/concat_kdf.go b/vendor/github.com/go-jose/go-jose/v3/cipher/concat_kdf.go
new file mode 100644
index 0000000000..f62c3bdba5
--- /dev/null
+++ b/vendor/github.com/go-jose/go-jose/v3/cipher/concat_kdf.go
@@ -0,0 +1,75 @@
+/*-
+ * Copyright 2014 Square Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package josecipher
+
+import (
+	"crypto"
+	"encoding/binary"
+	"hash"
+	"io"
+)
+
+type concatKDF struct {
+	z, info []byte
+	i       uint32
+	cache   []byte
+	hasher  hash.Hash
+}
+
+// NewConcatKDF builds a KDF reader based on the given inputs.
+func NewConcatKDF(hash crypto.Hash, z, algID, ptyUInfo, ptyVInfo, supPubInfo, supPrivInfo []byte) io.Reader {
+	buffer := make([]byte, uint64(len(algID))+uint64(len(ptyUInfo))+uint64(len(ptyVInfo))+uint64(len(supPubInfo))+uint64(len(supPrivInfo)))
+	n := 0
+	n += copy(buffer, algID)
+	n += copy(buffer[n:], ptyUInfo)
+	n += copy(buffer[n:], ptyVInfo)
+	n += copy(buffer[n:], supPubInfo)
+	copy(buffer[n:], supPrivInfo)
+
+	hasher := hash.New()
+
+	return &concatKDF{
+		z:      z,
+		info:   buffer,
+		hasher: hasher,
+		cache:  []byte{},
+		i:      1,
+	}
+}
+
+func (ctx *concatKDF) Read(out []byte) (int, error) {
+	copied := copy(out, ctx.cache)
+	ctx.cache = ctx.cache[copied:]
+
+	for copied < len(out) {
+		ctx.hasher.Reset()
+
+		// Write on a hash.Hash never fails
+		_ = binary.Write(ctx.hasher, binary.BigEndian, ctx.i)
+		_, _ = ctx.hasher.Write(ctx.z)
+		_, _ = ctx.hasher.Write(ctx.info)
+
+		hash := ctx.hasher.Sum(nil)
+		chunkCopied := copy(out[copied:], hash)
+		copied += chunkCopied
+		ctx.cache = hash[chunkCopied:]
+
+		ctx.i++
+	}
+
+	return copied, nil
+}
diff --git a/vendor/github.com/go-jose/go-jose/v3/cipher/ecdh_es.go b/vendor/github.com/go-jose/go-jose/v3/cipher/ecdh_es.go
new file mode 100644
index 0000000000..093c646740
--- /dev/null
+++ b/vendor/github.com/go-jose/go-jose/v3/cipher/ecdh_es.go
@@ -0,0 +1,86 @@
+/*-
+ * Copyright 2014 Square Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package josecipher
+
+import (
+	"bytes"
+	"crypto"
+	"crypto/ecdsa"
+	"crypto/elliptic"
+	"encoding/binary"
+)
+
+// DeriveECDHES derives a shared encryption key using ECDH/ConcatKDF as described in JWE/JWA.
+// It is an error to call this function with a private/public key that are not on the same
+// curve. Callers must ensure that the keys are valid before calling this function. Output
+// size may be at most 1<<16 bytes (64 KiB).
+func DeriveECDHES(alg string, apuData, apvData []byte, priv *ecdsa.PrivateKey, pub *ecdsa.PublicKey, size int) []byte {
+	if size > 1<<16 {
+		panic("ECDH-ES output size too large, must be less than or equal to 1<<16")
+	}
+
+	// algId, partyUInfo, partyVInfo inputs must be prefixed with the length
+	algID := lengthPrefixed([]byte(alg))
+	ptyUInfo := lengthPrefixed(apuData)
+	ptyVInfo := lengthPrefixed(apvData)
+
+	// suppPubInfo is the encoded length of the output size in bits
+	supPubInfo := make([]byte, 4)
+	binary.BigEndian.PutUint32(supPubInfo, uint32(size)*8)
+
+	if !priv.PublicKey.Curve.IsOnCurve(pub.X, pub.Y) {
+		panic("public key not on same curve as private key")
+	}
+
+	z, _ := priv.Curve.ScalarMult(pub.X, pub.Y, priv.D.Bytes())
+	zBytes := z.Bytes()
+
+	// Note that calling z.Bytes() on a big.Int may strip leading zero bytes from
+	// the returned byte array. This can lead to a problem where zBytes will be
+	// shorter than expected which breaks the key derivation. Therefore we must pad
+	// to the full length of the expected coordinate here before calling the KDF.
+	octSize := dSize(priv.Curve)
+	if len(zBytes) != octSize {
+		zBytes = append(bytes.Repeat([]byte{0}, octSize-len(zBytes)), zBytes...)
+	}
+
+	reader := NewConcatKDF(crypto.SHA256, zBytes, algID, ptyUInfo, ptyVInfo, supPubInfo, []byte{})
+	key := make([]byte, size)
+
+	// Read on the KDF will never fail
+	_, _ = reader.Read(key)
+
+	return key
+}
+
+// dSize returns the size in octets for a coordinate on a elliptic curve.
+func dSize(curve elliptic.Curve) int {
+	order := curve.Params().P
+	bitLen := order.BitLen()
+	size := bitLen / 8
+	if bitLen%8 != 0 {
+		size++
+	}
+	return size
+}
+
+func lengthPrefixed(data []byte) []byte {
+	out := make([]byte, len(data)+4)
+	binary.BigEndian.PutUint32(out, uint32(len(data)))
+	copy(out[4:], data)
+	return out
+}
diff --git a/vendor/github.com/go-jose/go-jose/v3/cipher/key_wrap.go b/vendor/github.com/go-jose/go-jose/v3/cipher/key_wrap.go
new file mode 100644
index 0000000000..b9effbca8a
--- /dev/null
+++ b/vendor/github.com/go-jose/go-jose/v3/cipher/key_wrap.go
@@ -0,0 +1,109 @@
+/*-
+ * Copyright 2014 Square Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package josecipher
+
+import (
+	"crypto/cipher"
+	"crypto/subtle"
+	"encoding/binary"
+	"errors"
+)
+
+var defaultIV = []byte{0xA6, 0xA6, 0xA6, 0xA6, 0xA6, 0xA6, 0xA6, 0xA6}
+
+// KeyWrap implements NIST key wrapping; it wraps a content encryption key (cek) with the given block cipher.
+func KeyWrap(block cipher.Block, cek []byte) ([]byte, error) {
+	if len(cek)%8 != 0 {
+		return nil, errors.New("go-jose/go-jose: key wrap input must be 8 byte blocks")
+	}
+
+	n := len(cek) / 8
+	r := make([][]byte, n)
+
+	for i := range r {
+		r[i] = make([]byte, 8)
+		copy(r[i], cek[i*8:])
+	}
+
+	buffer := make([]byte, 16)
+	tBytes := make([]byte, 8)
+	copy(buffer, defaultIV)
+
+	for t := 0; t < 6*n; t++ {
+		copy(buffer[8:], r[t%n])
+
+		block.Encrypt(buffer, buffer)
+
+		binary.BigEndian.PutUint64(tBytes, uint64(t+1))
+
+		for i := 0; i < 8; i++ {
+			buffer[i] ^= tBytes[i]
+		}
+		copy(r[t%n], buffer[8:])
+	}
+
+	out := make([]byte, (n+1)*8)
+	copy(out, buffer[:8])
+	for i := range r {
+		copy(out[(i+1)*8:], r[i])
+	}
+
+	return out, nil
+}
+
+// KeyUnwrap implements NIST key unwrapping; it unwraps a content encryption key (cek) with the given block cipher.
+func KeyUnwrap(block cipher.Block, ciphertext []byte) ([]byte, error) {
+	if len(ciphertext)%8 != 0 {
+		return nil, errors.New("go-jose/go-jose: key wrap input must be 8 byte blocks")
+	}
+
+	n := (len(ciphertext) / 8) - 1
+	r := make([][]byte, n)
+
+	for i := range r {
+		r[i] = make([]byte, 8)
+		copy(r[i], ciphertext[(i+1)*8:])
+	}
+
+	buffer := make([]byte, 16)
+	tBytes := make([]byte, 8)
+	copy(buffer[:8], ciphertext[:8])
+
+	for t := 6*n - 1; t >= 0; t-- {
+		binary.BigEndian.PutUint64(tBytes, uint64(t+1))
+
+		for i := 0; i < 8; i++ {
+			buffer[i] ^= tBytes[i]
+		}
+		copy(buffer[8:], r[t%n])
+
+		block.Decrypt(buffer, buffer)
+
+		copy(r[t%n], buffer[8:])
+	}
+
+	if subtle.ConstantTimeCompare(buffer[:8], defaultIV) == 0 {
+		return nil, errors.New("go-jose/go-jose: failed to unwrap key")
+	}
+
+	out := make([]byte, n*8)
+	for i := range r {
+		copy(out[i*8:], r[i])
+	}
+
+	return out, nil
+}
diff --git a/vendor/github.com/go-jose/go-jose/v3/crypter.go b/vendor/github.com/go-jose/go-jose/v3/crypter.go
new file mode 100644
index 0000000000..6901137e44
--- /dev/null
+++ b/vendor/github.com/go-jose/go-jose/v3/crypter.go
@@ -0,0 +1,544 @@
+/*-
+ * Copyright 2014 Square Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package jose
+
+import (
+	"crypto/ecdsa"
+	"crypto/rsa"
+	"errors"
+	"fmt"
+	"reflect"
+
+	"github.com/go-jose/go-jose/v3/json"
+)
+
+// Encrypter represents an encrypter which produces an encrypted JWE object.
+type Encrypter interface {
+	Encrypt(plaintext []byte) (*JSONWebEncryption, error)
+	EncryptWithAuthData(plaintext []byte, aad []byte) (*JSONWebEncryption, error)
+	Options() EncrypterOptions
+}
+
+// A generic content cipher
+type contentCipher interface {
+	keySize() int
+	encrypt(cek []byte, aad, plaintext []byte) (*aeadParts, error)
+	decrypt(cek []byte, aad []byte, parts *aeadParts) ([]byte, error)
+}
+
+// A key generator (for generating/getting a CEK)
+type keyGenerator interface {
+	keySize() int
+	genKey() ([]byte, rawHeader, error)
+}
+
+// A generic key encrypter
+type keyEncrypter interface {
+	encryptKey(cek []byte, alg KeyAlgorithm) (recipientInfo, error) // Encrypt a key
+}
+
+// A generic key decrypter
+type keyDecrypter interface {
+	decryptKey(headers rawHeader, recipient *recipientInfo, generator keyGenerator) ([]byte, error) // Decrypt a key
+}
+
+// A generic encrypter based on the given key encrypter and content cipher.
+type genericEncrypter struct {
+	contentAlg     ContentEncryption
+	compressionAlg CompressionAlgorithm
+	cipher         contentCipher
+	recipients     []recipientKeyInfo
+	keyGenerator   keyGenerator
+	extraHeaders   map[HeaderKey]interface{}
+}
+
+type recipientKeyInfo struct {
+	keyID        string
+	keyAlg       KeyAlgorithm
+	keyEncrypter keyEncrypter
+}
+
+// EncrypterOptions represents options that can be set on new encrypters.
+type EncrypterOptions struct {
+	Compression CompressionAlgorithm
+
+	// Optional map of additional keys to be inserted into the protected header
+	// of a JWS object. Some specifications which make use of JWS like to insert
+	// additional values here. All values must be JSON-serializable.
+	ExtraHeaders map[HeaderKey]interface{}
+}
+
+// WithHeader adds an arbitrary value to the ExtraHeaders map, initializing it
+// if necessary. It returns itself and so can be used in a fluent style.
+func (eo *EncrypterOptions) WithHeader(k HeaderKey, v interface{}) *EncrypterOptions {
+	if eo.ExtraHeaders == nil {
+		eo.ExtraHeaders = map[HeaderKey]interface{}{}
+	}
+	eo.ExtraHeaders[k] = v
+	return eo
+}
+
+// WithContentType adds a content type ("cty") header and returns the updated
+// EncrypterOptions.
+func (eo *EncrypterOptions) WithContentType(contentType ContentType) *EncrypterOptions {
+	return eo.WithHeader(HeaderContentType, contentType)
+}
+
+// WithType adds a type ("typ") header and returns the updated EncrypterOptions.
+func (eo *EncrypterOptions) WithType(typ ContentType) *EncrypterOptions {
+	return eo.WithHeader(HeaderType, typ)
+}
+
+// Recipient represents an algorithm/key to encrypt messages to.
+//
+// PBES2Count and PBES2Salt correspond with the  "p2c" and "p2s" headers used
+// on the password-based encryption algorithms PBES2-HS256+A128KW,
+// PBES2-HS384+A192KW, and PBES2-HS512+A256KW. If they are not provided a safe
+// default of 100000 will be used for the count and a 128-bit random salt will
+// be generated.
+type Recipient struct {
+	Algorithm  KeyAlgorithm
+	Key        interface{}
+	KeyID      string
+	PBES2Count int
+	PBES2Salt  []byte
+}
+
+// NewEncrypter creates an appropriate encrypter based on the key type
+func NewEncrypter(enc ContentEncryption, rcpt Recipient, opts *EncrypterOptions) (Encrypter, error) {
+	encrypter := &genericEncrypter{
+		contentAlg: enc,
+		recipients: []recipientKeyInfo{},
+		cipher:     getContentCipher(enc),
+	}
+	if opts != nil {
+		encrypter.compressionAlg = opts.Compression
+		encrypter.extraHeaders = opts.ExtraHeaders
+	}
+
+	if encrypter.cipher == nil {
+		return nil, ErrUnsupportedAlgorithm
+	}
+
+	var keyID string
+	var rawKey interface{}
+	switch encryptionKey := rcpt.Key.(type) {
+	case JSONWebKey:
+		keyID, rawKey = encryptionKey.KeyID, encryptionKey.Key
+	case *JSONWebKey:
+		keyID, rawKey = encryptionKey.KeyID, encryptionKey.Key
+	case OpaqueKeyEncrypter:
+		keyID, rawKey = encryptionKey.KeyID(), encryptionKey
+	default:
+		rawKey = encryptionKey
+	}
+
+	switch rcpt.Algorithm {
+	case DIRECT:
+		// Direct encryption mode must be treated differently
+		if reflect.TypeOf(rawKey) != reflect.TypeOf([]byte{}) {
+			return nil, ErrUnsupportedKeyType
+		}
+		if encrypter.cipher.keySize() != len(rawKey.([]byte)) {
+			return nil, ErrInvalidKeySize
+		}
+		encrypter.keyGenerator = staticKeyGenerator{
+			key: rawKey.([]byte),
+		}
+		recipientInfo, _ := newSymmetricRecipient(rcpt.Algorithm, rawKey.([]byte))
+		recipientInfo.keyID = keyID
+		if rcpt.KeyID != "" {
+			recipientInfo.keyID = rcpt.KeyID
+		}
+		encrypter.recipients = []recipientKeyInfo{recipientInfo}
+		return encrypter, nil
+	case ECDH_ES:
+		// ECDH-ES (w/o key wrapping) is similar to DIRECT mode
+		typeOf := reflect.TypeOf(rawKey)
+		if typeOf != reflect.TypeOf(&ecdsa.PublicKey{}) {
+			return nil, ErrUnsupportedKeyType
+		}
+		encrypter.keyGenerator = ecKeyGenerator{
+			size:      encrypter.cipher.keySize(),
+			algID:     string(enc),
+			publicKey: rawKey.(*ecdsa.PublicKey),
+		}
+		recipientInfo, _ := newECDHRecipient(rcpt.Algorithm, rawKey.(*ecdsa.PublicKey))
+		recipientInfo.keyID = keyID
+		if rcpt.KeyID != "" {
+			recipientInfo.keyID = rcpt.KeyID
+		}
+		encrypter.recipients = []recipientKeyInfo{recipientInfo}
+		return encrypter, nil
+	default:
+		// Can just add a standard recipient
+		encrypter.keyGenerator = randomKeyGenerator{
+			size: encrypter.cipher.keySize(),
+		}
+		err := encrypter.addRecipient(rcpt)
+		return encrypter, err
+	}
+}
+
+// NewMultiEncrypter creates a multi-encrypter based on the given parameters
+func NewMultiEncrypter(enc ContentEncryption, rcpts []Recipient, opts *EncrypterOptions) (Encrypter, error) {
+	cipher := getContentCipher(enc)
+
+	if cipher == nil {
+		return nil, ErrUnsupportedAlgorithm
+	}
+	if len(rcpts) == 0 {
+		return nil, fmt.Errorf("go-jose/go-jose: recipients is nil or empty")
+	}
+
+	encrypter := &genericEncrypter{
+		contentAlg: enc,
+		recipients: []recipientKeyInfo{},
+		cipher:     cipher,
+		keyGenerator: randomKeyGenerator{
+			size: cipher.keySize(),
+		},
+	}
+
+	if opts != nil {
+		encrypter.compressionAlg = opts.Compression
+		encrypter.extraHeaders = opts.ExtraHeaders
+	}
+
+	for _, recipient := range rcpts {
+		err := encrypter.addRecipient(recipient)
+		if err != nil {
+			return nil, err
+		}
+	}
+
+	return encrypter, nil
+}
+
+func (ctx *genericEncrypter) addRecipient(recipient Recipient) (err error) {
+	var recipientInfo recipientKeyInfo
+
+	switch recipient.Algorithm {
+	case DIRECT, ECDH_ES:
+		return fmt.Errorf("go-jose/go-jose: key algorithm '%s' not supported in multi-recipient mode", recipient.Algorithm)
+	}
+
+	recipientInfo, err = makeJWERecipient(recipient.Algorithm, recipient.Key)
+	if recipient.KeyID != "" {
+		recipientInfo.keyID = recipient.KeyID
+	}
+
+	switch recipient.Algorithm {
+	case PBES2_HS256_A128KW, PBES2_HS384_A192KW, PBES2_HS512_A256KW:
+		if sr, ok := recipientInfo.keyEncrypter.(*symmetricKeyCipher); ok {
+			sr.p2c = recipient.PBES2Count
+			sr.p2s = recipient.PBES2Salt
+		}
+	}
+
+	if err == nil {
+		ctx.recipients = append(ctx.recipients, recipientInfo)
+	}
+	return err
+}
+
+func makeJWERecipient(alg KeyAlgorithm, encryptionKey interface{}) (recipientKeyInfo, error) {
+	switch encryptionKey := encryptionKey.(type) {
+	case *rsa.PublicKey:
+		return newRSARecipient(alg, encryptionKey)
+	case *ecdsa.PublicKey:
+		return newECDHRecipient(alg, encryptionKey)
+	case []byte:
+		return newSymmetricRecipient(alg, encryptionKey)
+	case string:
+		return newSymmetricRecipient(alg, []byte(encryptionKey))
+	case *JSONWebKey:
+		recipient, err := makeJWERecipient(alg, encryptionKey.Key)
+		recipient.keyID = encryptionKey.KeyID
+		return recipient, err
+	}
+	if encrypter, ok := encryptionKey.(OpaqueKeyEncrypter); ok {
+		return newOpaqueKeyEncrypter(alg, encrypter)
+	}
+	return recipientKeyInfo{}, ErrUnsupportedKeyType
+}
+
+// newDecrypter creates an appropriate decrypter based on the key type
+func newDecrypter(decryptionKey interface{}) (keyDecrypter, error) {
+	switch decryptionKey := decryptionKey.(type) {
+	case *rsa.PrivateKey:
+		return &rsaDecrypterSigner{
+			privateKey: decryptionKey,
+		}, nil
+	case *ecdsa.PrivateKey:
+		return &ecDecrypterSigner{
+			privateKey: decryptionKey,
+		}, nil
+	case []byte:
+		return &symmetricKeyCipher{
+			key: decryptionKey,
+		}, nil
+	case string:
+		return &symmetricKeyCipher{
+			key: []byte(decryptionKey),
+		}, nil
+	case JSONWebKey:
+		return newDecrypter(decryptionKey.Key)
+	case *JSONWebKey:
+		return newDecrypter(decryptionKey.Key)
+	}
+	if okd, ok := decryptionKey.(OpaqueKeyDecrypter); ok {
+		return &opaqueKeyDecrypter{decrypter: okd}, nil
+	}
+	return nil, ErrUnsupportedKeyType
+}
+
+// Implementation of encrypt method producing a JWE object.
+func (ctx *genericEncrypter) Encrypt(plaintext []byte) (*JSONWebEncryption, error) {
+	return ctx.EncryptWithAuthData(plaintext, nil)
+}
+
+// Implementation of encrypt method producing a JWE object.
+func (ctx *genericEncrypter) EncryptWithAuthData(plaintext, aad []byte) (*JSONWebEncryption, error) {
+	obj := &JSONWebEncryption{}
+	obj.aad = aad
+
+	obj.protected = &rawHeader{}
+	err := obj.protected.set(headerEncryption, ctx.contentAlg)
+	if err != nil {
+		return nil, err
+	}
+
+	obj.recipients = make([]recipientInfo, len(ctx.recipients))
+
+	if len(ctx.recipients) == 0 {
+		return nil, fmt.Errorf("go-jose/go-jose: no recipients to encrypt to")
+	}
+
+	cek, headers, err := ctx.keyGenerator.genKey()
+	if err != nil {
+		return nil, err
+	}
+
+	obj.protected.merge(&headers)
+
+	for i, info := range ctx.recipients {
+		recipient, err := info.keyEncrypter.encryptKey(cek, info.keyAlg)
+		if err != nil {
+			return nil, err
+		}
+
+		err = recipient.header.set(headerAlgorithm, info.keyAlg)
+		if err != nil {
+			return nil, err
+		}
+
+		if info.keyID != "" {
+			err = recipient.header.set(headerKeyID, info.keyID)
+			if err != nil {
+				return nil, err
+			}
+		}
+		obj.recipients[i] = recipient
+	}
+
+	if len(ctx.recipients) == 1 {
+		// Move per-recipient headers into main protected header if there's
+		// only a single recipient.
+		obj.protected.merge(obj.recipients[0].header)
+		obj.recipients[0].header = nil
+	}
+
+	if ctx.compressionAlg != NONE {
+		plaintext, err = compress(ctx.compressionAlg, plaintext)
+		if err != nil {
+			return nil, err
+		}
+
+		err = obj.protected.set(headerCompression, ctx.compressionAlg)
+		if err != nil {
+			return nil, err
+		}
+	}
+
+	for k, v := range ctx.extraHeaders {
+		b, err := json.Marshal(v)
+		if err != nil {
+			return nil, err
+		}
+		(*obj.protected)[k] = makeRawMessage(b)
+	}
+
+	authData := obj.computeAuthData()
+	parts, err := ctx.cipher.encrypt(cek, authData, plaintext)
+	if err != nil {
+		return nil, err
+	}
+
+	obj.iv = parts.iv
+	obj.ciphertext = parts.ciphertext
+	obj.tag = parts.tag
+
+	return obj, nil
+}
+
+func (ctx *genericEncrypter) Options() EncrypterOptions {
+	return EncrypterOptions{
+		Compression:  ctx.compressionAlg,
+		ExtraHeaders: ctx.extraHeaders,
+	}
+}
+
+// Decrypt and validate the object and return the plaintext. Note that this
+// function does not support multi-recipient, if you desire multi-recipient
+// decryption use DecryptMulti instead.
+func (obj JSONWebEncryption) Decrypt(decryptionKey interface{}) ([]byte, error) {
+	headers := obj.mergedHeaders(nil)
+
+	if len(obj.recipients) > 1 {
+		return nil, errors.New("go-jose/go-jose: too many recipients in payload; expecting only one")
+	}
+
+	critical, err := headers.getCritical()
+	if err != nil {
+		return nil, fmt.Errorf("go-jose/go-jose: invalid crit header")
+	}
+
+	if len(critical) > 0 {
+		return nil, fmt.Errorf("go-jose/go-jose: unsupported crit header")
+	}
+
+	key := tryJWKS(decryptionKey, obj.Header)
+	decrypter, err := newDecrypter(key)
+	if err != nil {
+		return nil, err
+	}
+
+	cipher := getContentCipher(headers.getEncryption())
+	if cipher == nil {
+		return nil, fmt.Errorf("go-jose/go-jose: unsupported enc value '%s'", string(headers.getEncryption()))
+	}
+
+	generator := randomKeyGenerator{
+		size: cipher.keySize(),
+	}
+
+	parts := &aeadParts{
+		iv:         obj.iv,
+		ciphertext: obj.ciphertext,
+		tag:        obj.tag,
+	}
+
+	authData := obj.computeAuthData()
+
+	var plaintext []byte
+	recipient := obj.recipients[0]
+	recipientHeaders := obj.mergedHeaders(&recipient)
+
+	cek, err := decrypter.decryptKey(recipientHeaders, &recipient, generator)
+	if err == nil {
+		// Found a valid CEK -- let's try to decrypt.
+		plaintext, err = cipher.decrypt(cek, authData, parts)
+	}
+
+	if plaintext == nil {
+		return nil, ErrCryptoFailure
+	}
+
+	// The "zip" header parameter may only be present in the protected header.
+	if comp := obj.protected.getCompression(); comp != "" {
+		plaintext, err = decompress(comp, plaintext)
+	}
+
+	return plaintext, err
+}
+
+// DecryptMulti decrypts and validates the object and returns the plaintexts,
+// with support for multiple recipients. It returns the index of the recipient
+// for which the decryption was successful, the merged headers for that recipient,
+// and the plaintext.
+func (obj JSONWebEncryption) DecryptMulti(decryptionKey interface{}) (int, Header, []byte, error) {
+	globalHeaders := obj.mergedHeaders(nil)
+
+	critical, err := globalHeaders.getCritical()
+	if err != nil {
+		return -1, Header{}, nil, fmt.Errorf("go-jose/go-jose: invalid crit header")
+	}
+
+	if len(critical) > 0 {
+		return -1, Header{}, nil, fmt.Errorf("go-jose/go-jose: unsupported crit header")
+	}
+
+	key := tryJWKS(decryptionKey, obj.Header)
+	decrypter, err := newDecrypter(key)
+	if err != nil {
+		return -1, Header{}, nil, err
+	}
+
+	encryption := globalHeaders.getEncryption()
+	cipher := getContentCipher(encryption)
+	if cipher == nil {
+		return -1, Header{}, nil, fmt.Errorf("go-jose/go-jose: unsupported enc value '%s'", string(encryption))
+	}
+
+	generator := randomKeyGenerator{
+		size: cipher.keySize(),
+	}
+
+	parts := &aeadParts{
+		iv:         obj.iv,
+		ciphertext: obj.ciphertext,
+		tag:        obj.tag,
+	}
+
+	authData := obj.computeAuthData()
+
+	index := -1
+	var plaintext []byte
+	var headers rawHeader
+
+	for i, recipient := range obj.recipients {
+		recipientHeaders := obj.mergedHeaders(&recipient)
+
+		cek, err := decrypter.decryptKey(recipientHeaders, &recipient, generator)
+		if err == nil {
+			// Found a valid CEK -- let's try to decrypt.
+			plaintext, err = cipher.decrypt(cek, authData, parts)
+			if err == nil {
+				index = i
+				headers = recipientHeaders
+				break
+			}
+		}
+	}
+
+	if plaintext == nil {
+		return -1, Header{}, nil, ErrCryptoFailure
+	}
+
+	// The "zip" header parameter may only be present in the protected header.
+	if comp := obj.protected.getCompression(); comp != "" {
+		plaintext, _ = decompress(comp, plaintext)
+	}
+
+	sanitized, err := headers.sanitized()
+	if err != nil {
+		return -1, Header{}, nil, fmt.Errorf("go-jose/go-jose: failed to sanitize header: %v", err)
+	}
+
+	return index, sanitized, plaintext, err
+}
diff --git a/vendor/github.com/go-jose/go-jose/v3/doc.go b/vendor/github.com/go-jose/go-jose/v3/doc.go
new file mode 100644
index 0000000000..71ec1c419b
--- /dev/null
+++ b/vendor/github.com/go-jose/go-jose/v3/doc.go
@@ -0,0 +1,27 @@
+/*-
+ * Copyright 2014 Square Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/*
+
+Package jose aims to provide an implementation of the Javascript Object Signing
+and Encryption set of standards. It implements encryption and signing based on
+the JSON Web Encryption and JSON Web Signature standards, with optional JSON Web
+Token support available in a sub-package. The library supports both the compact
+and JWS/JWE JSON Serialization formats, and has optional support for multiple
+recipients.
+
+*/
+package jose
diff --git a/vendor/github.com/go-jose/go-jose/v3/encoding.go b/vendor/github.com/go-jose/go-jose/v3/encoding.go
new file mode 100644
index 0000000000..968a42496e
--- /dev/null
+++ b/vendor/github.com/go-jose/go-jose/v3/encoding.go
@@ -0,0 +1,191 @@
+/*-
+ * Copyright 2014 Square Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package jose
+
+import (
+	"bytes"
+	"compress/flate"
+	"encoding/base64"
+	"encoding/binary"
+	"io"
+	"math/big"
+	"strings"
+	"unicode"
+
+	"github.com/go-jose/go-jose/v3/json"
+)
+
+// Helper function to serialize known-good objects.
+// Precondition: value is not a nil pointer.
+func mustSerializeJSON(value interface{}) []byte {
+	out, err := json.Marshal(value)
+	if err != nil {
+		panic(err)
+	}
+	// We never want to serialize the top-level value "null," since it's not a
+	// valid JOSE message. But if a caller passes in a nil pointer to this method,
+	// MarshalJSON will happily serialize it as the top-level value "null". If
+	// that value is then embedded in another operation, for instance by being
+	// base64-encoded and fed as input to a signing algorithm
+	// (https://github.com/go-jose/go-jose/issues/22), the result will be
+	// incorrect. Because this method is intended for known-good objects, and a nil
+	// pointer is not a known-good object, we are free to panic in this case.
+	// Note: It's not possible to directly check whether the data pointed at by an
+	// interface is a nil pointer, so we do this hacky workaround.
+	// https://groups.google.com/forum/#!topic/golang-nuts/wnH302gBa4I
+	if string(out) == "null" {
+		panic("Tried to serialize a nil pointer.")
+	}
+	return out
+}
+
+// Strip all newlines and whitespace
+func stripWhitespace(data string) string {
+	buf := strings.Builder{}
+	buf.Grow(len(data))
+	for _, r := range data {
+		if !unicode.IsSpace(r) {
+			buf.WriteRune(r)
+		}
+	}
+	return buf.String()
+}
+
+// Perform compression based on algorithm
+func compress(algorithm CompressionAlgorithm, input []byte) ([]byte, error) {
+	switch algorithm {
+	case DEFLATE:
+		return deflate(input)
+	default:
+		return nil, ErrUnsupportedAlgorithm
+	}
+}
+
+// Perform decompression based on algorithm
+func decompress(algorithm CompressionAlgorithm, input []byte) ([]byte, error) {
+	switch algorithm {
+	case DEFLATE:
+		return inflate(input)
+	default:
+		return nil, ErrUnsupportedAlgorithm
+	}
+}
+
+// Compress with DEFLATE
+func deflate(input []byte) ([]byte, error) {
+	output := new(bytes.Buffer)
+
+	// Writing to byte buffer, err is always nil
+	writer, _ := flate.NewWriter(output, 1)
+	_, _ = io.Copy(writer, bytes.NewBuffer(input))
+
+	err := writer.Close()
+	return output.Bytes(), err
+}
+
+// Decompress with DEFLATE
+func inflate(input []byte) ([]byte, error) {
+	output := new(bytes.Buffer)
+	reader := flate.NewReader(bytes.NewBuffer(input))
+
+	_, err := io.Copy(output, reader)
+	if err != nil {
+		return nil, err
+	}
+
+	err = reader.Close()
+	return output.Bytes(), err
+}
+
+// byteBuffer represents a slice of bytes that can be serialized to url-safe base64.
+type byteBuffer struct {
+	data []byte
+}
+
+func newBuffer(data []byte) *byteBuffer {
+	if data == nil {
+		return nil
+	}
+	return &byteBuffer{
+		data: data,
+	}
+}
+
+func newFixedSizeBuffer(data []byte, length int) *byteBuffer {
+	if len(data) > length {
+		panic("go-jose/go-jose: invalid call to newFixedSizeBuffer (len(data) > length)")
+	}
+	pad := make([]byte, length-len(data))
+	return newBuffer(append(pad, data...))
+}
+
+func newBufferFromInt(num uint64) *byteBuffer {
+	data := make([]byte, 8)
+	binary.BigEndian.PutUint64(data, num)
+	return newBuffer(bytes.TrimLeft(data, "\x00"))
+}
+
+func (b *byteBuffer) MarshalJSON() ([]byte, error) {
+	return json.Marshal(b.base64())
+}
+
+func (b *byteBuffer) UnmarshalJSON(data []byte) error {
+	var encoded string
+	err := json.Unmarshal(data, &encoded)
+	if err != nil {
+		return err
+	}
+
+	if encoded == "" {
+		return nil
+	}
+
+	decoded, err := base64URLDecode(encoded)
+	if err != nil {
+		return err
+	}
+
+	*b = *newBuffer(decoded)
+
+	return nil
+}
+
+func (b *byteBuffer) base64() string {
+	return base64.RawURLEncoding.EncodeToString(b.data)
+}
+
+func (b *byteBuffer) bytes() []byte {
+	// Handling nil here allows us to transparently handle nil slices when serializing.
+	if b == nil {
+		return nil
+	}
+	return b.data
+}
+
+func (b byteBuffer) bigInt() *big.Int {
+	return new(big.Int).SetBytes(b.data)
+}
+
+func (b byteBuffer) toInt() int {
+	return int(b.bigInt().Int64())
+}
+
+// base64URLDecode is implemented as defined in https://www.rfc-editor.org/rfc/rfc7515.html#appendix-C
+func base64URLDecode(value string) ([]byte, error) {
+	value = strings.TrimRight(value, "=")
+	return base64.RawURLEncoding.DecodeString(value)
+}
diff --git a/vendor/github.com/go-jose/go-jose/v3/json/LICENSE b/vendor/github.com/go-jose/go-jose/v3/json/LICENSE
new file mode 100644
index 0000000000..7448756763
--- /dev/null
+++ b/vendor/github.com/go-jose/go-jose/v3/json/LICENSE
@@ -0,0 +1,27 @@
+Copyright (c) 2012 The Go Authors. All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+   * Redistributions of source code must retain the above copyright
+notice, this list of conditions and the following disclaimer.
+   * Redistributions in binary form must reproduce the above
+copyright notice, this list of conditions and the following disclaimer
+in the documentation and/or other materials provided with the
+distribution.
+   * Neither the name of Google Inc. nor the names of its
+contributors may be used to endorse or promote products derived from
+this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/vendor/github.com/go-jose/go-jose/v3/json/README.md b/vendor/github.com/go-jose/go-jose/v3/json/README.md
new file mode 100644
index 0000000000..86de5e5581
--- /dev/null
+++ b/vendor/github.com/go-jose/go-jose/v3/json/README.md
@@ -0,0 +1,13 @@
+# Safe JSON
+
+This repository contains a fork of the `encoding/json` package from Go 1.6.
+
+The following changes were made:
+
+* Object deserialization uses case-sensitive member name matching instead of
+  [case-insensitive matching](https://www.ietf.org/mail-archive/web/json/current/msg03763.html).
+  This is to avoid differences in the interpretation of JOSE messages between
+  go-jose and libraries written in other languages.
+* When deserializing a JSON object, we check for duplicate keys and reject the
+  input whenever we detect a duplicate. Rather than trying to work with malformed
+  data, we prefer to reject it right away.
diff --git a/vendor/github.com/go-jose/go-jose/v3/json/decode.go b/vendor/github.com/go-jose/go-jose/v3/json/decode.go
new file mode 100644
index 0000000000..4dbc4146cf
--- /dev/null
+++ b/vendor/github.com/go-jose/go-jose/v3/json/decode.go
@@ -0,0 +1,1217 @@
+// Copyright 2010 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Represents JSON data structure using native Go types: booleans, floats,
+// strings, arrays, and maps.
+
+package json
+
+import (
+	"bytes"
+	"encoding"
+	"encoding/base64"
+	"errors"
+	"fmt"
+	"math"
+	"reflect"
+	"runtime"
+	"strconv"
+	"unicode"
+	"unicode/utf16"
+	"unicode/utf8"
+)
+
+// Unmarshal parses the JSON-encoded data and stores the result
+// in the value pointed to by v.
+//
+// Unmarshal uses the inverse of the encodings that
+// Marshal uses, allocating maps, slices, and pointers as necessary,
+// with the following additional rules:
+//
+// To unmarshal JSON into a pointer, Unmarshal first handles the case of
+// the JSON being the JSON literal null.  In that case, Unmarshal sets
+// the pointer to nil.  Otherwise, Unmarshal unmarshals the JSON into
+// the value pointed at by the pointer.  If the pointer is nil, Unmarshal
+// allocates a new value for it to point to.
+//
+// To unmarshal JSON into a struct, Unmarshal matches incoming object
+// keys to the keys used by Marshal (either the struct field name or its tag),
+// preferring an exact match but also accepting a case-insensitive match.
+// Unmarshal will only set exported fields of the struct.
+//
+// To unmarshal JSON into an interface value,
+// Unmarshal stores one of these in the interface value:
+//
+//	bool, for JSON booleans
+//	float64, for JSON numbers
+//	string, for JSON strings
+//	[]interface{}, for JSON arrays
+//	map[string]interface{}, for JSON objects
+//	nil for JSON null
+//
+// To unmarshal a JSON array into a slice, Unmarshal resets the slice length
+// to zero and then appends each element to the slice.
+// As a special case, to unmarshal an empty JSON array into a slice,
+// Unmarshal replaces the slice with a new empty slice.
+//
+// To unmarshal a JSON array into a Go array, Unmarshal decodes
+// JSON array elements into corresponding Go array elements.
+// If the Go array is smaller than the JSON array,
+// the additional JSON array elements are discarded.
+// If the JSON array is smaller than the Go array,
+// the additional Go array elements are set to zero values.
+//
+// To unmarshal a JSON object into a string-keyed map, Unmarshal first
+// establishes a map to use, If the map is nil, Unmarshal allocates a new map.
+// Otherwise Unmarshal reuses the existing map, keeping existing entries.
+// Unmarshal then stores key-value pairs from the JSON object into the map.
+//
+// If a JSON value is not appropriate for a given target type,
+// or if a JSON number overflows the target type, Unmarshal
+// skips that field and completes the unmarshaling as best it can.
+// If no more serious errors are encountered, Unmarshal returns
+// an UnmarshalTypeError describing the earliest such error.
+//
+// The JSON null value unmarshals into an interface, map, pointer, or slice
+// by setting that Go value to nil. Because null is often used in JSON to mean
+// ``not present,'' unmarshaling a JSON null into any other Go type has no effect
+// on the value and produces no error.
+//
+// When unmarshaling quoted strings, invalid UTF-8 or
+// invalid UTF-16 surrogate pairs are not treated as an error.
+// Instead, they are replaced by the Unicode replacement
+// character U+FFFD.
+//
+func Unmarshal(data []byte, v interface{}) error {
+	// Check for well-formedness.
+	// Avoids filling out half a data structure
+	// before discovering a JSON syntax error.
+	var d decodeState
+	err := checkValid(data, &d.scan)
+	if err != nil {
+		return err
+	}
+
+	d.init(data)
+	return d.unmarshal(v)
+}
+
+// Unmarshaler is the interface implemented by objects
+// that can unmarshal a JSON description of themselves.
+// The input can be assumed to be a valid encoding of
+// a JSON value. UnmarshalJSON must copy the JSON data
+// if it wishes to retain the data after returning.
+type Unmarshaler interface {
+	UnmarshalJSON([]byte) error
+}
+
+// An UnmarshalTypeError describes a JSON value that was
+// not appropriate for a value of a specific Go type.
+type UnmarshalTypeError struct {
+	Value  string       // description of JSON value - "bool", "array", "number -5"
+	Type   reflect.Type // type of Go value it could not be assigned to
+	Offset int64        // error occurred after reading Offset bytes
+}
+
+func (e *UnmarshalTypeError) Error() string {
+	return "json: cannot unmarshal " + e.Value + " into Go value of type " + e.Type.String()
+}
+
+// An UnmarshalFieldError describes a JSON object key that
+// led to an unexported (and therefore unwritable) struct field.
+// (No longer used; kept for compatibility.)
+type UnmarshalFieldError struct {
+	Key   string
+	Type  reflect.Type
+	Field reflect.StructField
+}
+
+func (e *UnmarshalFieldError) Error() string {
+	return "json: cannot unmarshal object key " + strconv.Quote(e.Key) + " into unexported field " + e.Field.Name + " of type " + e.Type.String()
+}
+
+// An InvalidUnmarshalError describes an invalid argument passed to Unmarshal.
+// (The argument to Unmarshal must be a non-nil pointer.)
+type InvalidUnmarshalError struct {
+	Type reflect.Type
+}
+
+func (e *InvalidUnmarshalError) Error() string {
+	if e.Type == nil {
+		return "json: Unmarshal(nil)"
+	}
+
+	if e.Type.Kind() != reflect.Ptr {
+		return "json: Unmarshal(non-pointer " + e.Type.String() + ")"
+	}
+	return "json: Unmarshal(nil " + e.Type.String() + ")"
+}
+
+func (d *decodeState) unmarshal(v interface{}) (err error) {
+	defer func() {
+		if r := recover(); r != nil {
+			if _, ok := r.(runtime.Error); ok {
+				panic(r)
+			}
+			err = r.(error)
+		}
+	}()
+
+	rv := reflect.ValueOf(v)
+	if rv.Kind() != reflect.Ptr || rv.IsNil() {
+		return &InvalidUnmarshalError{reflect.TypeOf(v)}
+	}
+
+	d.scan.reset()
+	// We decode rv not rv.Elem because the Unmarshaler interface
+	// test must be applied at the top level of the value.
+	d.value(rv)
+	return d.savedError
+}
+
+// A Number represents a JSON number literal.
+type Number string
+
+// String returns the literal text of the number.
+func (n Number) String() string { return string(n) }
+
+// Float64 returns the number as a float64.
+func (n Number) Float64() (float64, error) {
+	return strconv.ParseFloat(string(n), 64)
+}
+
+// Int64 returns the number as an int64.
+func (n Number) Int64() (int64, error) {
+	return strconv.ParseInt(string(n), 10, 64)
+}
+
+// isValidNumber reports whether s is a valid JSON number literal.
+func isValidNumber(s string) bool {
+	// This function implements the JSON numbers grammar.
+	// See https://tools.ietf.org/html/rfc7159#section-6
+	// and http://json.org/number.gif
+
+	if s == "" {
+		return false
+	}
+
+	// Optional -
+	if s[0] == '-' {
+		s = s[1:]
+		if s == "" {
+			return false
+		}
+	}
+
+	// Digits
+	switch {
+	default:
+		return false
+
+	case s[0] == '0':
+		s = s[1:]
+
+	case '1' <= s[0] && s[0] <= '9':
+		s = s[1:]
+		for len(s) > 0 && '0' <= s[0] && s[0] <= '9' {
+			s = s[1:]
+		}
+	}
+
+	// . followed by 1 or more digits.
+	if len(s) >= 2 && s[0] == '.' && '0' <= s[1] && s[1] <= '9' {
+		s = s[2:]
+		for len(s) > 0 && '0' <= s[0] && s[0] <= '9' {
+			s = s[1:]
+		}
+	}
+
+	// e or E followed by an optional - or + and
+	// 1 or more digits.
+	if len(s) >= 2 && (s[0] == 'e' || s[0] == 'E') {
+		s = s[1:]
+		if s[0] == '+' || s[0] == '-' {
+			s = s[1:]
+			if s == "" {
+				return false
+			}
+		}
+		for len(s) > 0 && '0' <= s[0] && s[0] <= '9' {
+			s = s[1:]
+		}
+	}
+
+	// Make sure we are at the end.
+	return s == ""
+}
+
+type NumberUnmarshalType int
+
+const (
+	// unmarshal a JSON number into an interface{} as a float64
+	UnmarshalFloat NumberUnmarshalType = iota
+	// unmarshal a JSON number into an interface{} as a `json.Number`
+	UnmarshalJSONNumber
+	// unmarshal a JSON number into an interface{} as a int64
+	// if value is an integer otherwise float64
+	UnmarshalIntOrFloat
+)
+
+// decodeState represents the state while decoding a JSON value.
+type decodeState struct {
+	data       []byte
+	off        int // read offset in data
+	scan       scanner
+	nextscan   scanner // for calls to nextValue
+	savedError error
+	numberType NumberUnmarshalType
+}
+
+// errPhase is used for errors that should not happen unless
+// there is a bug in the JSON decoder or something is editing
+// the data slice while the decoder executes.
+var errPhase = errors.New("JSON decoder out of sync - data changing underfoot?")
+
+func (d *decodeState) init(data []byte) *decodeState {
+	d.data = data
+	d.off = 0
+	d.savedError = nil
+	return d
+}
+
+// error aborts the decoding by panicking with err.
+func (d *decodeState) error(err error) {
+	panic(err)
+}
+
+// saveError saves the first err it is called with,
+// for reporting at the end of the unmarshal.
+func (d *decodeState) saveError(err error) {
+	if d.savedError == nil {
+		d.savedError = err
+	}
+}
+
+// next cuts off and returns the next full JSON value in d.data[d.off:].
+// The next value is known to be an object or array, not a literal.
+func (d *decodeState) next() []byte {
+	c := d.data[d.off]
+	item, rest, err := nextValue(d.data[d.off:], &d.nextscan)
+	if err != nil {
+		d.error(err)
+	}
+	d.off = len(d.data) - len(rest)
+
+	// Our scanner has seen the opening brace/bracket
+	// and thinks we're still in the middle of the object.
+	// invent a closing brace/bracket to get it out.
+	if c == '{' {
+		d.scan.step(&d.scan, '}')
+	} else {
+		d.scan.step(&d.scan, ']')
+	}
+
+	return item
+}
+
+// scanWhile processes bytes in d.data[d.off:] until it
+// receives a scan code not equal to op.
+// It updates d.off and returns the new scan code.
+func (d *decodeState) scanWhile(op int) int {
+	var newOp int
+	for {
+		if d.off >= len(d.data) {
+			newOp = d.scan.eof()
+			d.off = len(d.data) + 1 // mark processed EOF with len+1
+		} else {
+			c := d.data[d.off]
+			d.off++
+			newOp = d.scan.step(&d.scan, c)
+		}
+		if newOp != op {
+			break
+		}
+	}
+	return newOp
+}
+
+// value decodes a JSON value from d.data[d.off:] into the value.
+// it updates d.off to point past the decoded value.
+func (d *decodeState) value(v reflect.Value) {
+	if !v.IsValid() {
+		_, rest, err := nextValue(d.data[d.off:], &d.nextscan)
+		if err != nil {
+			d.error(err)
+		}
+		d.off = len(d.data) - len(rest)
+
+		// d.scan thinks we're still at the beginning of the item.
+		// Feed in an empty string - the shortest, simplest value -
+		// so that it knows we got to the end of the value.
+		if d.scan.redo {
+			// rewind.
+			d.scan.redo = false
+			d.scan.step = stateBeginValue
+		}
+		d.scan.step(&d.scan, '"')
+		d.scan.step(&d.scan, '"')
+
+		n := len(d.scan.parseState)
+		if n > 0 && d.scan.parseState[n-1] == parseObjectKey {
+			// d.scan thinks we just read an object key; finish the object
+			d.scan.step(&d.scan, ':')
+			d.scan.step(&d.scan, '"')
+			d.scan.step(&d.scan, '"')
+			d.scan.step(&d.scan, '}')
+		}
+
+		return
+	}
+
+	switch op := d.scanWhile(scanSkipSpace); op {
+	default:
+		d.error(errPhase)
+
+	case scanBeginArray:
+		d.array(v)
+
+	case scanBeginObject:
+		d.object(v)
+
+	case scanBeginLiteral:
+		d.literal(v)
+	}
+}
+
+type unquotedValue struct{}
+
+// valueQuoted is like value but decodes a
+// quoted string literal or literal null into an interface value.
+// If it finds anything other than a quoted string literal or null,
+// valueQuoted returns unquotedValue{}.
+func (d *decodeState) valueQuoted() interface{} {
+	switch op := d.scanWhile(scanSkipSpace); op {
+	default:
+		d.error(errPhase)
+
+	case scanBeginArray:
+		d.array(reflect.Value{})
+
+	case scanBeginObject:
+		d.object(reflect.Value{})
+
+	case scanBeginLiteral:
+		switch v := d.literalInterface().(type) {
+		case nil, string:
+			return v
+		}
+	}
+	return unquotedValue{}
+}
+
+// indirect walks down v allocating pointers as needed,
+// until it gets to a non-pointer.
+// if it encounters an Unmarshaler, indirect stops and returns that.
+// if decodingNull is true, indirect stops at the last pointer so it can be set to nil.
+func (d *decodeState) indirect(v reflect.Value, decodingNull bool) (Unmarshaler, encoding.TextUnmarshaler, reflect.Value) {
+	// If v is a named type and is addressable,
+	// start with its address, so that if the type has pointer methods,
+	// we find them.
+	if v.Kind() != reflect.Ptr && v.Type().Name() != "" && v.CanAddr() {
+		v = v.Addr()
+	}
+	for {
+		// Load value from interface, but only if the result will be
+		// usefully addressable.
+		if v.Kind() == reflect.Interface && !v.IsNil() {
+			e := v.Elem()
+			if e.Kind() == reflect.Ptr && !e.IsNil() && (!decodingNull || e.Elem().Kind() == reflect.Ptr) {
+				v = e
+				continue
+			}
+		}
+
+		if v.Kind() != reflect.Ptr {
+			break
+		}
+
+		if v.Elem().Kind() != reflect.Ptr && decodingNull && v.CanSet() {
+			break
+		}
+		if v.IsNil() {
+			v.Set(reflect.New(v.Type().Elem()))
+		}
+		if v.Type().NumMethod() > 0 {
+			if u, ok := v.Interface().(Unmarshaler); ok {
+				return u, nil, reflect.Value{}
+			}
+			if u, ok := v.Interface().(encoding.TextUnmarshaler); ok {
+				return nil, u, reflect.Value{}
+			}
+		}
+		v = v.Elem()
+	}
+	return nil, nil, v
+}
+
+// array consumes an array from d.data[d.off-1:], decoding into the value v.
+// the first byte of the array ('[') has been read already.
+func (d *decodeState) array(v reflect.Value) {
+	// Check for unmarshaler.
+	u, ut, pv := d.indirect(v, false)
+	if u != nil {
+		d.off--
+		err := u.UnmarshalJSON(d.next())
+		if err != nil {
+			d.error(err)
+		}
+		return
+	}
+	if ut != nil {
+		d.saveError(&UnmarshalTypeError{"array", v.Type(), int64(d.off)})
+		d.off--
+		d.next()
+		return
+	}
+
+	v = pv
+
+	// Check type of target.
+	switch v.Kind() {
+	case reflect.Interface:
+		if v.NumMethod() == 0 {
+			// Decoding into nil interface?  Switch to non-reflect code.
+			v.Set(reflect.ValueOf(d.arrayInterface()))
+			return
+		}
+		// Otherwise it's invalid.
+		fallthrough
+	default:
+		d.saveError(&UnmarshalTypeError{"array", v.Type(), int64(d.off)})
+		d.off--
+		d.next()
+		return
+	case reflect.Array:
+	case reflect.Slice:
+		break
+	}
+
+	i := 0
+	for {
+		// Look ahead for ] - can only happen on first iteration.
+		op := d.scanWhile(scanSkipSpace)
+		if op == scanEndArray {
+			break
+		}
+
+		// Back up so d.value can have the byte we just read.
+		d.off--
+		d.scan.undo(op)
+
+		// Get element of array, growing if necessary.
+		if v.Kind() == reflect.Slice {
+			// Grow slice if necessary
+			if i >= v.Cap() {
+				newcap := v.Cap() + v.Cap()/2
+				if newcap < 4 {
+					newcap = 4
+				}
+				newv := reflect.MakeSlice(v.Type(), v.Len(), newcap)
+				reflect.Copy(newv, v)
+				v.Set(newv)
+			}
+			if i >= v.Len() {
+				v.SetLen(i + 1)
+			}
+		}
+
+		if i < v.Len() {
+			// Decode into element.
+			d.value(v.Index(i))
+		} else {
+			// Ran out of fixed array: skip.
+			d.value(reflect.Value{})
+		}
+		i++
+
+		// Next token must be , or ].
+		op = d.scanWhile(scanSkipSpace)
+		if op == scanEndArray {
+			break
+		}
+		if op != scanArrayValue {
+			d.error(errPhase)
+		}
+	}
+
+	if i < v.Len() {
+		if v.Kind() == reflect.Array {
+			// Array.  Zero the rest.
+			z := reflect.Zero(v.Type().Elem())
+			for ; i < v.Len(); i++ {
+				v.Index(i).Set(z)
+			}
+		} else {
+			v.SetLen(i)
+		}
+	}
+	if i == 0 && v.Kind() == reflect.Slice {
+		v.Set(reflect.MakeSlice(v.Type(), 0, 0))
+	}
+}
+
+var nullLiteral = []byte("null")
+
+// object consumes an object from d.data[d.off-1:], decoding into the value v.
+// the first byte ('{') of the object has been read already.
+func (d *decodeState) object(v reflect.Value) {
+	// Check for unmarshaler.
+	u, ut, pv := d.indirect(v, false)
+	if u != nil {
+		d.off--
+		err := u.UnmarshalJSON(d.next())
+		if err != nil {
+			d.error(err)
+		}
+		return
+	}
+	if ut != nil {
+		d.saveError(&UnmarshalTypeError{"object", v.Type(), int64(d.off)})
+		d.off--
+		d.next() // skip over { } in input
+		return
+	}
+	v = pv
+
+	// Decoding into nil interface?  Switch to non-reflect code.
+	if v.Kind() == reflect.Interface && v.NumMethod() == 0 {
+		v.Set(reflect.ValueOf(d.objectInterface()))
+		return
+	}
+
+	// Check type of target: struct or map[string]T
+	switch v.Kind() {
+	case reflect.Map:
+		// map must have string kind
+		t := v.Type()
+		if t.Key().Kind() != reflect.String {
+			d.saveError(&UnmarshalTypeError{"object", v.Type(), int64(d.off)})
+			d.off--
+			d.next() // skip over { } in input
+			return
+		}
+		if v.IsNil() {
+			v.Set(reflect.MakeMap(t))
+		}
+	case reflect.Struct:
+
+	default:
+		d.saveError(&UnmarshalTypeError{"object", v.Type(), int64(d.off)})
+		d.off--
+		d.next() // skip over { } in input
+		return
+	}
+
+	var mapElem reflect.Value
+	keys := map[string]bool{}
+
+	for {
+		// Read opening " of string key or closing }.
+		op := d.scanWhile(scanSkipSpace)
+		if op == scanEndObject {
+			// closing } - can only happen on first iteration.
+			break
+		}
+		if op != scanBeginLiteral {
+			d.error(errPhase)
+		}
+
+		// Read key.
+		start := d.off - 1
+		op = d.scanWhile(scanContinue)
+		item := d.data[start : d.off-1]
+		key, ok := unquote(item)
+		if !ok {
+			d.error(errPhase)
+		}
+
+		// Check for duplicate keys.
+		_, ok = keys[key]
+		if !ok {
+			keys[key] = true
+		} else {
+			d.error(fmt.Errorf("json: duplicate key '%s' in object", key))
+		}
+
+		// Figure out field corresponding to key.
+		var subv reflect.Value
+		destring := false // whether the value is wrapped in a string to be decoded first
+
+		if v.Kind() == reflect.Map {
+			elemType := v.Type().Elem()
+			if !mapElem.IsValid() {
+				mapElem = reflect.New(elemType).Elem()
+			} else {
+				mapElem.Set(reflect.Zero(elemType))
+			}
+			subv = mapElem
+		} else {
+			var f *field
+			fields := cachedTypeFields(v.Type())
+			for i := range fields {
+				ff := &fields[i]
+				if bytes.Equal(ff.nameBytes, []byte(key)) {
+					f = ff
+					break
+				}
+			}
+			if f != nil {
+				subv = v
+				destring = f.quoted
+				for _, i := range f.index {
+					if subv.Kind() == reflect.Ptr {
+						if subv.IsNil() {
+							subv.Set(reflect.New(subv.Type().Elem()))
+						}
+						subv = subv.Elem()
+					}
+					subv = subv.Field(i)
+				}
+			}
+		}
+
+		// Read : before value.
+		if op == scanSkipSpace {
+			op = d.scanWhile(scanSkipSpace)
+		}
+		if op != scanObjectKey {
+			d.error(errPhase)
+		}
+
+		// Read value.
+		if destring {
+			switch qv := d.valueQuoted().(type) {
+			case nil:
+				d.literalStore(nullLiteral, subv, false)
+			case string:
+				d.literalStore([]byte(qv), subv, true)
+			default:
+				d.saveError(fmt.Errorf("json: invalid use of ,string struct tag, trying to unmarshal unquoted value into %v", subv.Type()))
+			}
+		} else {
+			d.value(subv)
+		}
+
+		// Write value back to map;
+		// if using struct, subv points into struct already.
+		if v.Kind() == reflect.Map {
+			kv := reflect.ValueOf(key).Convert(v.Type().Key())
+			v.SetMapIndex(kv, subv)
+		}
+
+		// Next token must be , or }.
+		op = d.scanWhile(scanSkipSpace)
+		if op == scanEndObject {
+			break
+		}
+		if op != scanObjectValue {
+			d.error(errPhase)
+		}
+	}
+}
+
+// literal consumes a literal from d.data[d.off-1:], decoding into the value v.
+// The first byte of the literal has been read already
+// (that's how the caller knows it's a literal).
+func (d *decodeState) literal(v reflect.Value) {
+	// All bytes inside literal return scanContinue op code.
+	start := d.off - 1
+	op := d.scanWhile(scanContinue)
+
+	// Scan read one byte too far; back up.
+	d.off--
+	d.scan.undo(op)
+
+	d.literalStore(d.data[start:d.off], v, false)
+}
+
+// convertNumber converts the number literal s to a float64, int64 or a Number
+// depending on d.numberDecodeType.
+func (d *decodeState) convertNumber(s string) (interface{}, error) {
+	switch d.numberType {
+
+	case UnmarshalJSONNumber:
+		return Number(s), nil
+	case UnmarshalIntOrFloat:
+		v, err := strconv.ParseInt(s, 10, 64)
+		if err == nil {
+			return v, nil
+		}
+
+		// tries to parse integer number in scientific notation
+		f, err := strconv.ParseFloat(s, 64)
+		if err != nil {
+			return nil, &UnmarshalTypeError{"number " + s, reflect.TypeOf(0.0), int64(d.off)}
+		}
+
+		// if it has no decimal value use int64
+		if fi, fd := math.Modf(f); fd == 0.0 {
+			return int64(fi), nil
+		}
+		return f, nil
+	default:
+		f, err := strconv.ParseFloat(s, 64)
+		if err != nil {
+			return nil, &UnmarshalTypeError{"number " + s, reflect.TypeOf(0.0), int64(d.off)}
+		}
+		return f, nil
+	}
+
+}
+
+var numberType = reflect.TypeOf(Number(""))
+
+// literalStore decodes a literal stored in item into v.
+//
+// fromQuoted indicates whether this literal came from unwrapping a
+// string from the ",string" struct tag option. this is used only to
+// produce more helpful error messages.
+func (d *decodeState) literalStore(item []byte, v reflect.Value, fromQuoted bool) {
+	// Check for unmarshaler.
+	if len(item) == 0 {
+		//Empty string given
+		d.saveError(fmt.Errorf("json: invalid use of ,string struct tag, trying to unmarshal %q into %v", item, v.Type()))
+		return
+	}
+	wantptr := item[0] == 'n' // null
+	u, ut, pv := d.indirect(v, wantptr)
+	if u != nil {
+		err := u.UnmarshalJSON(item)
+		if err != nil {
+			d.error(err)
+		}
+		return
+	}
+	if ut != nil {
+		if item[0] != '"' {
+			if fromQuoted {
+				d.saveError(fmt.Errorf("json: invalid use of ,string struct tag, trying to unmarshal %q into %v", item, v.Type()))
+			} else {
+				d.saveError(&UnmarshalTypeError{"string", v.Type(), int64(d.off)})
+			}
+			return
+		}
+		s, ok := unquoteBytes(item)
+		if !ok {
+			if fromQuoted {
+				d.error(fmt.Errorf("json: invalid use of ,string struct tag, trying to unmarshal %q into %v", item, v.Type()))
+			} else {
+				d.error(errPhase)
+			}
+		}
+		err := ut.UnmarshalText(s)
+		if err != nil {
+			d.error(err)
+		}
+		return
+	}
+
+	v = pv
+
+	switch c := item[0]; c {
+	case 'n': // null
+		switch v.Kind() {
+		case reflect.Interface, reflect.Ptr, reflect.Map, reflect.Slice:
+			v.Set(reflect.Zero(v.Type()))
+			// otherwise, ignore null for primitives/string
+		}
+	case 't', 'f': // true, false
+		value := c == 't'
+		switch v.Kind() {
+		default:
+			if fromQuoted {
+				d.saveError(fmt.Errorf("json: invalid use of ,string struct tag, trying to unmarshal %q into %v", item, v.Type()))
+			} else {
+				d.saveError(&UnmarshalTypeError{"bool", v.Type(), int64(d.off)})
+			}
+		case reflect.Bool:
+			v.SetBool(value)
+		case reflect.Interface:
+			if v.NumMethod() == 0 {
+				v.Set(reflect.ValueOf(value))
+			} else {
+				d.saveError(&UnmarshalTypeError{"bool", v.Type(), int64(d.off)})
+			}
+		}
+
+	case '"': // string
+		s, ok := unquoteBytes(item)
+		if !ok {
+			if fromQuoted {
+				d.error(fmt.Errorf("json: invalid use of ,string struct tag, trying to unmarshal %q into %v", item, v.Type()))
+			} else {
+				d.error(errPhase)
+			}
+		}
+		switch v.Kind() {
+		default:
+			d.saveError(&UnmarshalTypeError{"string", v.Type(), int64(d.off)})
+		case reflect.Slice:
+			if v.Type().Elem().Kind() != reflect.Uint8 {
+				d.saveError(&UnmarshalTypeError{"string", v.Type(), int64(d.off)})
+				break
+			}
+			b := make([]byte, base64.StdEncoding.DecodedLen(len(s)))
+			n, err := base64.StdEncoding.Decode(b, s)
+			if err != nil {
+				d.saveError(err)
+				break
+			}
+			v.SetBytes(b[:n])
+		case reflect.String:
+			v.SetString(string(s))
+		case reflect.Interface:
+			if v.NumMethod() == 0 {
+				v.Set(reflect.ValueOf(string(s)))
+			} else {
+				d.saveError(&UnmarshalTypeError{"string", v.Type(), int64(d.off)})
+			}
+		}
+
+	default: // number
+		if c != '-' && (c < '0' || c > '9') {
+			if fromQuoted {
+				d.error(fmt.Errorf("json: invalid use of ,string struct tag, trying to unmarshal %q into %v", item, v.Type()))
+			} else {
+				d.error(errPhase)
+			}
+		}
+		s := string(item)
+		switch v.Kind() {
+		default:
+			if v.Kind() == reflect.String && v.Type() == numberType {
+				v.SetString(s)
+				if !isValidNumber(s) {
+					d.error(fmt.Errorf("json: invalid number literal, trying to unmarshal %q into Number", item))
+				}
+				break
+			}
+			if fromQuoted {
+				d.error(fmt.Errorf("json: invalid use of ,string struct tag, trying to unmarshal %q into %v", item, v.Type()))
+			} else {
+				d.error(&UnmarshalTypeError{"number", v.Type(), int64(d.off)})
+			}
+		case reflect.Interface:
+			n, err := d.convertNumber(s)
+			if err != nil {
+				d.saveError(err)
+				break
+			}
+			if v.NumMethod() != 0 {
+				d.saveError(&UnmarshalTypeError{"number", v.Type(), int64(d.off)})
+				break
+			}
+			v.Set(reflect.ValueOf(n))
+
+		case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
+			n, err := strconv.ParseInt(s, 10, 64)
+			if err != nil || v.OverflowInt(n) {
+				d.saveError(&UnmarshalTypeError{"number " + s, v.Type(), int64(d.off)})
+				break
+			}
+			v.SetInt(n)
+
+		case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
+			n, err := strconv.ParseUint(s, 10, 64)
+			if err != nil || v.OverflowUint(n) {
+				d.saveError(&UnmarshalTypeError{"number " + s, v.Type(), int64(d.off)})
+				break
+			}
+			v.SetUint(n)
+
+		case reflect.Float32, reflect.Float64:
+			n, err := strconv.ParseFloat(s, v.Type().Bits())
+			if err != nil || v.OverflowFloat(n) {
+				d.saveError(&UnmarshalTypeError{"number " + s, v.Type(), int64(d.off)})
+				break
+			}
+			v.SetFloat(n)
+		}
+	}
+}
+
+// The xxxInterface routines build up a value to be stored
+// in an empty interface.  They are not strictly necessary,
+// but they avoid the weight of reflection in this common case.
+
+// valueInterface is like value but returns interface{}
+func (d *decodeState) valueInterface() interface{} {
+	switch d.scanWhile(scanSkipSpace) {
+	default:
+		d.error(errPhase)
+		panic("unreachable")
+	case scanBeginArray:
+		return d.arrayInterface()
+	case scanBeginObject:
+		return d.objectInterface()
+	case scanBeginLiteral:
+		return d.literalInterface()
+	}
+}
+
+// arrayInterface is like array but returns []interface{}.
+func (d *decodeState) arrayInterface() []interface{} {
+	var v = make([]interface{}, 0)
+	for {
+		// Look ahead for ] - can only happen on first iteration.
+		op := d.scanWhile(scanSkipSpace)
+		if op == scanEndArray {
+			break
+		}
+
+		// Back up so d.value can have the byte we just read.
+		d.off--
+		d.scan.undo(op)
+
+		v = append(v, d.valueInterface())
+
+		// Next token must be , or ].
+		op = d.scanWhile(scanSkipSpace)
+		if op == scanEndArray {
+			break
+		}
+		if op != scanArrayValue {
+			d.error(errPhase)
+		}
+	}
+	return v
+}
+
+// objectInterface is like object but returns map[string]interface{}.
+func (d *decodeState) objectInterface() map[string]interface{} {
+	m := make(map[string]interface{})
+	keys := map[string]bool{}
+
+	for {
+		// Read opening " of string key or closing }.
+		op := d.scanWhile(scanSkipSpace)
+		if op == scanEndObject {
+			// closing } - can only happen on first iteration.
+			break
+		}
+		if op != scanBeginLiteral {
+			d.error(errPhase)
+		}
+
+		// Read string key.
+		start := d.off - 1
+		op = d.scanWhile(scanContinue)
+		item := d.data[start : d.off-1]
+		key, ok := unquote(item)
+		if !ok {
+			d.error(errPhase)
+		}
+
+		// Check for duplicate keys.
+		_, ok = keys[key]
+		if !ok {
+			keys[key] = true
+		} else {
+			d.error(fmt.Errorf("json: duplicate key '%s' in object", key))
+		}
+
+		// Read : before value.
+		if op == scanSkipSpace {
+			op = d.scanWhile(scanSkipSpace)
+		}
+		if op != scanObjectKey {
+			d.error(errPhase)
+		}
+
+		// Read value.
+		m[key] = d.valueInterface()
+
+		// Next token must be , or }.
+		op = d.scanWhile(scanSkipSpace)
+		if op == scanEndObject {
+			break
+		}
+		if op != scanObjectValue {
+			d.error(errPhase)
+		}
+	}
+	return m
+}
+
+// literalInterface is like literal but returns an interface value.
+func (d *decodeState) literalInterface() interface{} {
+	// All bytes inside literal return scanContinue op code.
+	start := d.off - 1
+	op := d.scanWhile(scanContinue)
+
+	// Scan read one byte too far; back up.
+	d.off--
+	d.scan.undo(op)
+	item := d.data[start:d.off]
+
+	switch c := item[0]; c {
+	case 'n': // null
+		return nil
+
+	case 't', 'f': // true, false
+		return c == 't'
+
+	case '"': // string
+		s, ok := unquote(item)
+		if !ok {
+			d.error(errPhase)
+		}
+		return s
+
+	default: // number
+		if c != '-' && (c < '0' || c > '9') {
+			d.error(errPhase)
+		}
+		n, err := d.convertNumber(string(item))
+		if err != nil {
+			d.saveError(err)
+		}
+		return n
+	}
+}
+
+// getu4 decodes \uXXXX from the beginning of s, returning the hex value,
+// or it returns -1.
+func getu4(s []byte) rune {
+	if len(s) < 6 || s[0] != '\\' || s[1] != 'u' {
+		return -1
+	}
+	r, err := strconv.ParseUint(string(s[2:6]), 16, 64)
+	if err != nil {
+		return -1
+	}
+	return rune(r)
+}
+
+// unquote converts a quoted JSON string literal s into an actual string t.
+// The rules are different than for Go, so cannot use strconv.Unquote.
+func unquote(s []byte) (t string, ok bool) {
+	s, ok = unquoteBytes(s)
+	t = string(s)
+	return
+}
+
+func unquoteBytes(s []byte) (t []byte, ok bool) {
+	if len(s) < 2 || s[0] != '"' || s[len(s)-1] != '"' {
+		return
+	}
+	s = s[1 : len(s)-1]
+
+	// Check for unusual characters. If there are none,
+	// then no unquoting is needed, so return a slice of the
+	// original bytes.
+	r := 0
+	for r < len(s) {
+		c := s[r]
+		if c == '\\' || c == '"' || c < ' ' {
+			break
+		}
+		if c < utf8.RuneSelf {
+			r++
+			continue
+		}
+		rr, size := utf8.DecodeRune(s[r:])
+		if rr == utf8.RuneError && size == 1 {
+			break
+		}
+		r += size
+	}
+	if r == len(s) {
+		return s, true
+	}
+
+	b := make([]byte, len(s)+2*utf8.UTFMax)
+	w := copy(b, s[0:r])
+	for r < len(s) {
+		// Out of room?  Can only happen if s is full of
+		// malformed UTF-8 and we're replacing each
+		// byte with RuneError.
+		if w >= len(b)-2*utf8.UTFMax {
+			nb := make([]byte, (len(b)+utf8.UTFMax)*2)
+			copy(nb, b[0:w])
+			b = nb
+		}
+		switch c := s[r]; {
+		case c == '\\':
+			r++
+			if r >= len(s) {
+				return
+			}
+			switch s[r] {
+			default:
+				return
+			case '"', '\\', '/', '\'':
+				b[w] = s[r]
+				r++
+				w++
+			case 'b':
+				b[w] = '\b'
+				r++
+				w++
+			case 'f':
+				b[w] = '\f'
+				r++
+				w++
+			case 'n':
+				b[w] = '\n'
+				r++
+				w++
+			case 'r':
+				b[w] = '\r'
+				r++
+				w++
+			case 't':
+				b[w] = '\t'
+				r++
+				w++
+			case 'u':
+				r--
+				rr := getu4(s[r:])
+				if rr < 0 {
+					return
+				}
+				r += 6
+				if utf16.IsSurrogate(rr) {
+					rr1 := getu4(s[r:])
+					if dec := utf16.DecodeRune(rr, rr1); dec != unicode.ReplacementChar {
+						// A valid pair; consume.
+						r += 6
+						w += utf8.EncodeRune(b[w:], dec)
+						break
+					}
+					// Invalid surrogate; fall back to replacement rune.
+					rr = unicode.ReplacementChar
+				}
+				w += utf8.EncodeRune(b[w:], rr)
+			}
+
+		// Quote, control characters are invalid.
+		case c == '"', c < ' ':
+			return
+
+		// ASCII
+		case c < utf8.RuneSelf:
+			b[w] = c
+			r++
+			w++
+
+		// Coerce to well-formed UTF-8.
+		default:
+			rr, size := utf8.DecodeRune(s[r:])
+			r += size
+			w += utf8.EncodeRune(b[w:], rr)
+		}
+	}
+	return b[0:w], true
+}
diff --git a/vendor/github.com/go-jose/go-jose/v3/json/encode.go b/vendor/github.com/go-jose/go-jose/v3/json/encode.go
new file mode 100644
index 0000000000..ea0a136198
--- /dev/null
+++ b/vendor/github.com/go-jose/go-jose/v3/json/encode.go
@@ -0,0 +1,1197 @@
+// Copyright 2010 The Go Authors.  All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package json implements encoding and decoding of JSON objects as defined in
+// RFC 4627. The mapping between JSON objects and Go values is described
+// in the documentation for the Marshal and Unmarshal functions.
+//
+// See "JSON and Go" for an introduction to this package:
+// https://golang.org/doc/articles/json_and_go.html
+package json
+
+import (
+	"bytes"
+	"encoding"
+	"encoding/base64"
+	"fmt"
+	"math"
+	"reflect"
+	"runtime"
+	"sort"
+	"strconv"
+	"strings"
+	"sync"
+	"unicode"
+	"unicode/utf8"
+)
+
+// Marshal returns the JSON encoding of v.
+//
+// Marshal traverses the value v recursively.
+// If an encountered value implements the Marshaler interface
+// and is not a nil pointer, Marshal calls its MarshalJSON method
+// to produce JSON. If no MarshalJSON method is present but the
+// value implements encoding.TextMarshaler instead, Marshal calls
+// its MarshalText method.
+// The nil pointer exception is not strictly necessary
+// but mimics a similar, necessary exception in the behavior of
+// UnmarshalJSON.
+//
+// Otherwise, Marshal uses the following type-dependent default encodings:
+//
+// Boolean values encode as JSON booleans.
+//
+// Floating point, integer, and Number values encode as JSON numbers.
+//
+// String values encode as JSON strings coerced to valid UTF-8,
+// replacing invalid bytes with the Unicode replacement rune.
+// The angle brackets "<" and ">" are escaped to "\u003c" and "\u003e"
+// to keep some browsers from misinterpreting JSON output as HTML.
+// Ampersand "&" is also escaped to "\u0026" for the same reason.
+//
+// Array and slice values encode as JSON arrays, except that
+// []byte encodes as a base64-encoded string, and a nil slice
+// encodes as the null JSON object.
+//
+// Struct values encode as JSON objects. Each exported struct field
+// becomes a member of the object unless
+//   - the field's tag is "-", or
+//   - the field is empty and its tag specifies the "omitempty" option.
+// The empty values are false, 0, any
+// nil pointer or interface value, and any array, slice, map, or string of
+// length zero. The object's default key string is the struct field name
+// but can be specified in the struct field's tag value. The "json" key in
+// the struct field's tag value is the key name, followed by an optional comma
+// and options. Examples:
+//
+//   // Field is ignored by this package.
+//   Field int `json:"-"`
+//
+//   // Field appears in JSON as key "myName".
+//   Field int `json:"myName"`
+//
+//   // Field appears in JSON as key "myName" and
+//   // the field is omitted from the object if its value is empty,
+//   // as defined above.
+//   Field int `json:"myName,omitempty"`
+//
+//   // Field appears in JSON as key "Field" (the default), but
+//   // the field is skipped if empty.
+//   // Note the leading comma.
+//   Field int `json:",omitempty"`
+//
+// The "string" option signals that a field is stored as JSON inside a
+// JSON-encoded string. It applies only to fields of string, floating point,
+// integer, or boolean types. This extra level of encoding is sometimes used
+// when communicating with JavaScript programs:
+//
+//    Int64String int64 `json:",string"`
+//
+// The key name will be used if it's a non-empty string consisting of
+// only Unicode letters, digits, dollar signs, percent signs, hyphens,
+// underscores and slashes.
+//
+// Anonymous struct fields are usually marshaled as if their inner exported fields
+// were fields in the outer struct, subject to the usual Go visibility rules amended
+// as described in the next paragraph.
+// An anonymous struct field with a name given in its JSON tag is treated as
+// having that name, rather than being anonymous.
+// An anonymous struct field of interface type is treated the same as having
+// that type as its name, rather than being anonymous.
+//
+// The Go visibility rules for struct fields are amended for JSON when
+// deciding which field to marshal or unmarshal. If there are
+// multiple fields at the same level, and that level is the least
+// nested (and would therefore be the nesting level selected by the
+// usual Go rules), the following extra rules apply:
+//
+// 1) Of those fields, if any are JSON-tagged, only tagged fields are considered,
+// even if there are multiple untagged fields that would otherwise conflict.
+// 2) If there is exactly one field (tagged or not according to the first rule), that is selected.
+// 3) Otherwise there are multiple fields, and all are ignored; no error occurs.
+//
+// Handling of anonymous struct fields is new in Go 1.1.
+// Prior to Go 1.1, anonymous struct fields were ignored. To force ignoring of
+// an anonymous struct field in both current and earlier versions, give the field
+// a JSON tag of "-".
+//
+// Map values encode as JSON objects.
+// The map's key type must be string; the map keys are used as JSON object
+// keys, subject to the UTF-8 coercion described for string values above.
+//
+// Pointer values encode as the value pointed to.
+// A nil pointer encodes as the null JSON object.
+//
+// Interface values encode as the value contained in the interface.
+// A nil interface value encodes as the null JSON object.
+//
+// Channel, complex, and function values cannot be encoded in JSON.
+// Attempting to encode such a value causes Marshal to return
+// an UnsupportedTypeError.
+//
+// JSON cannot represent cyclic data structures and Marshal does not
+// handle them.  Passing cyclic structures to Marshal will result in
+// an infinite recursion.
+//
+func Marshal(v interface{}) ([]byte, error) {
+	e := &encodeState{}
+	err := e.marshal(v)
+	if err != nil {
+		return nil, err
+	}
+	return e.Bytes(), nil
+}
+
+// MarshalIndent is like Marshal but applies Indent to format the output.
+func MarshalIndent(v interface{}, prefix, indent string) ([]byte, error) {
+	b, err := Marshal(v)
+	if err != nil {
+		return nil, err
+	}
+	var buf bytes.Buffer
+	err = Indent(&buf, b, prefix, indent)
+	if err != nil {
+		return nil, err
+	}
+	return buf.Bytes(), nil
+}
+
+// HTMLEscape appends to dst the JSON-encoded src with <, >, &, U+2028 and U+2029
+// characters inside string literals changed to \u003c, \u003e, \u0026, \u2028, \u2029
+// so that the JSON will be safe to embed inside HTML <script> tags.
+// For historical reasons, web browsers don't honor standard HTML
+// escaping within <script> tags, so an alternative JSON encoding must
+// be used.
+func HTMLEscape(dst *bytes.Buffer, src []byte) {
+	// The characters can only appear in string literals,
+	// so just scan the string one byte at a time.
+	start := 0
+	for i, c := range src {
+		if c == '<' || c == '>' || c == '&' {
+			if start < i {
+				dst.Write(src[start:i])
+			}
+			dst.WriteString(`\u00`)
+			dst.WriteByte(hex[c>>4])
+			dst.WriteByte(hex[c&0xF])
+			start = i + 1
+		}
+		// Convert U+2028 and U+2029 (E2 80 A8 and E2 80 A9).
+		if c == 0xE2 && i+2 < len(src) && src[i+1] == 0x80 && src[i+2]&^1 == 0xA8 {
+			if start < i {
+				dst.Write(src[start:i])
+			}
+			dst.WriteString(`\u202`)
+			dst.WriteByte(hex[src[i+2]&0xF])
+			start = i + 3
+		}
+	}
+	if start < len(src) {
+		dst.Write(src[start:])
+	}
+}
+
+// Marshaler is the interface implemented by objects that
+// can marshal themselves into valid JSON.
+type Marshaler interface {
+	MarshalJSON() ([]byte, error)
+}
+
+// An UnsupportedTypeError is returned by Marshal when attempting
+// to encode an unsupported value type.
+type UnsupportedTypeError struct {
+	Type reflect.Type
+}
+
+func (e *UnsupportedTypeError) Error() string {
+	return "json: unsupported type: " + e.Type.String()
+}
+
+type UnsupportedValueError struct {
+	Value reflect.Value
+	Str   string
+}
+
+func (e *UnsupportedValueError) Error() string {
+	return "json: unsupported value: " + e.Str
+}
+
+// Before Go 1.2, an InvalidUTF8Error was returned by Marshal when
+// attempting to encode a string value with invalid UTF-8 sequences.
+// As of Go 1.2, Marshal instead coerces the string to valid UTF-8 by
+// replacing invalid bytes with the Unicode replacement rune U+FFFD.
+// This error is no longer generated but is kept for backwards compatibility
+// with programs that might mention it.
+type InvalidUTF8Error struct {
+	S string // the whole string value that caused the error
+}
+
+func (e *InvalidUTF8Error) Error() string {
+	return "json: invalid UTF-8 in string: " + strconv.Quote(e.S)
+}
+
+type MarshalerError struct {
+	Type reflect.Type
+	Err  error
+}
+
+func (e *MarshalerError) Error() string {
+	return "json: error calling MarshalJSON for type " + e.Type.String() + ": " + e.Err.Error()
+}
+
+var hex = "0123456789abcdef"
+
+// An encodeState encodes JSON into a bytes.Buffer.
+type encodeState struct {
+	bytes.Buffer // accumulated output
+	scratch      [64]byte
+}
+
+var encodeStatePool sync.Pool
+
+func newEncodeState() *encodeState {
+	if v := encodeStatePool.Get(); v != nil {
+		e := v.(*encodeState)
+		e.Reset()
+		return e
+	}
+	return new(encodeState)
+}
+
+func (e *encodeState) marshal(v interface{}) (err error) {
+	defer func() {
+		if r := recover(); r != nil {
+			if _, ok := r.(runtime.Error); ok {
+				panic(r)
+			}
+			if s, ok := r.(string); ok {
+				panic(s)
+			}
+			err = r.(error)
+		}
+	}()
+	e.reflectValue(reflect.ValueOf(v))
+	return nil
+}
+
+func (e *encodeState) error(err error) {
+	panic(err)
+}
+
+func isEmptyValue(v reflect.Value) bool {
+	switch v.Kind() {
+	case reflect.Array, reflect.Map, reflect.Slice, reflect.String:
+		return v.Len() == 0
+	case reflect.Bool:
+		return !v.Bool()
+	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
+		return v.Int() == 0
+	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
+		return v.Uint() == 0
+	case reflect.Float32, reflect.Float64:
+		return v.Float() == 0
+	case reflect.Interface, reflect.Ptr:
+		return v.IsNil()
+	}
+	return false
+}
+
+func (e *encodeState) reflectValue(v reflect.Value) {
+	valueEncoder(v)(e, v, false)
+}
+
+type encoderFunc func(e *encodeState, v reflect.Value, quoted bool)
+
+var encoderCache struct {
+	sync.RWMutex
+	m map[reflect.Type]encoderFunc
+}
+
+func valueEncoder(v reflect.Value) encoderFunc {
+	if !v.IsValid() {
+		return invalidValueEncoder
+	}
+	return typeEncoder(v.Type())
+}
+
+func typeEncoder(t reflect.Type) encoderFunc {
+	encoderCache.RLock()
+	f := encoderCache.m[t]
+	encoderCache.RUnlock()
+	if f != nil {
+		return f
+	}
+
+	// To deal with recursive types, populate the map with an
+	// indirect func before we build it. This type waits on the
+	// real func (f) to be ready and then calls it.  This indirect
+	// func is only used for recursive types.
+	encoderCache.Lock()
+	if encoderCache.m == nil {
+		encoderCache.m = make(map[reflect.Type]encoderFunc)
+	}
+	var wg sync.WaitGroup
+	wg.Add(1)
+	encoderCache.m[t] = func(e *encodeState, v reflect.Value, quoted bool) {
+		wg.Wait()
+		f(e, v, quoted)
+	}
+	encoderCache.Unlock()
+
+	// Compute fields without lock.
+	// Might duplicate effort but won't hold other computations back.
+	f = newTypeEncoder(t, true)
+	wg.Done()
+	encoderCache.Lock()
+	encoderCache.m[t] = f
+	encoderCache.Unlock()
+	return f
+}
+
+var (
+	marshalerType     = reflect.TypeOf(new(Marshaler)).Elem()
+	textMarshalerType = reflect.TypeOf(new(encoding.TextMarshaler)).Elem()
+)
+
+// newTypeEncoder constructs an encoderFunc for a type.
+// The returned encoder only checks CanAddr when allowAddr is true.
+func newTypeEncoder(t reflect.Type, allowAddr bool) encoderFunc {
+	if t.Implements(marshalerType) {
+		return marshalerEncoder
+	}
+	if t.Kind() != reflect.Ptr && allowAddr {
+		if reflect.PtrTo(t).Implements(marshalerType) {
+			return newCondAddrEncoder(addrMarshalerEncoder, newTypeEncoder(t, false))
+		}
+	}
+
+	if t.Implements(textMarshalerType) {
+		return textMarshalerEncoder
+	}
+	if t.Kind() != reflect.Ptr && allowAddr {
+		if reflect.PtrTo(t).Implements(textMarshalerType) {
+			return newCondAddrEncoder(addrTextMarshalerEncoder, newTypeEncoder(t, false))
+		}
+	}
+
+	switch t.Kind() {
+	case reflect.Bool:
+		return boolEncoder
+	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
+		return intEncoder
+	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
+		return uintEncoder
+	case reflect.Float32:
+		return float32Encoder
+	case reflect.Float64:
+		return float64Encoder
+	case reflect.String:
+		return stringEncoder
+	case reflect.Interface:
+		return interfaceEncoder
+	case reflect.Struct:
+		return newStructEncoder(t)
+	case reflect.Map:
+		return newMapEncoder(t)
+	case reflect.Slice:
+		return newSliceEncoder(t)
+	case reflect.Array:
+		return newArrayEncoder(t)
+	case reflect.Ptr:
+		return newPtrEncoder(t)
+	default:
+		return unsupportedTypeEncoder
+	}
+}
+
+func invalidValueEncoder(e *encodeState, v reflect.Value, quoted bool) {
+	e.WriteString("null")
+}
+
+func marshalerEncoder(e *encodeState, v reflect.Value, quoted bool) {
+	if v.Kind() == reflect.Ptr && v.IsNil() {
+		e.WriteString("null")
+		return
+	}
+	m := v.Interface().(Marshaler)
+	b, err := m.MarshalJSON()
+	if err == nil {
+		// copy JSON into buffer, checking validity.
+		err = compact(&e.Buffer, b, true)
+	}
+	if err != nil {
+		e.error(&MarshalerError{v.Type(), err})
+	}
+}
+
+func addrMarshalerEncoder(e *encodeState, v reflect.Value, quoted bool) {
+	va := v.Addr()
+	if va.IsNil() {
+		e.WriteString("null")
+		return
+	}
+	m := va.Interface().(Marshaler)
+	b, err := m.MarshalJSON()
+	if err == nil {
+		// copy JSON into buffer, checking validity.
+		err = compact(&e.Buffer, b, true)
+	}
+	if err != nil {
+		e.error(&MarshalerError{v.Type(), err})
+	}
+}
+
+func textMarshalerEncoder(e *encodeState, v reflect.Value, quoted bool) {
+	if v.Kind() == reflect.Ptr && v.IsNil() {
+		e.WriteString("null")
+		return
+	}
+	m := v.Interface().(encoding.TextMarshaler)
+	b, err := m.MarshalText()
+	if err != nil {
+		e.error(&MarshalerError{v.Type(), err})
+	}
+	e.stringBytes(b)
+}
+
+func addrTextMarshalerEncoder(e *encodeState, v reflect.Value, quoted bool) {
+	va := v.Addr()
+	if va.IsNil() {
+		e.WriteString("null")
+		return
+	}
+	m := va.Interface().(encoding.TextMarshaler)
+	b, err := m.MarshalText()
+	if err != nil {
+		e.error(&MarshalerError{v.Type(), err})
+	}
+	e.stringBytes(b)
+}
+
+func boolEncoder(e *encodeState, v reflect.Value, quoted bool) {
+	if quoted {
+		e.WriteByte('"')
+	}
+	if v.Bool() {
+		e.WriteString("true")
+	} else {
+		e.WriteString("false")
+	}
+	if quoted {
+		e.WriteByte('"')
+	}
+}
+
+func intEncoder(e *encodeState, v reflect.Value, quoted bool) {
+	b := strconv.AppendInt(e.scratch[:0], v.Int(), 10)
+	if quoted {
+		e.WriteByte('"')
+	}
+	e.Write(b)
+	if quoted {
+		e.WriteByte('"')
+	}
+}
+
+func uintEncoder(e *encodeState, v reflect.Value, quoted bool) {
+	b := strconv.AppendUint(e.scratch[:0], v.Uint(), 10)
+	if quoted {
+		e.WriteByte('"')
+	}
+	e.Write(b)
+	if quoted {
+		e.WriteByte('"')
+	}
+}
+
+type floatEncoder int // number of bits
+
+func (bits floatEncoder) encode(e *encodeState, v reflect.Value, quoted bool) {
+	f := v.Float()
+	if math.IsInf(f, 0) || math.IsNaN(f) {
+		e.error(&UnsupportedValueError{v, strconv.FormatFloat(f, 'g', -1, int(bits))})
+	}
+	b := strconv.AppendFloat(e.scratch[:0], f, 'g', -1, int(bits))
+	if quoted {
+		e.WriteByte('"')
+	}
+	e.Write(b)
+	if quoted {
+		e.WriteByte('"')
+	}
+}
+
+var (
+	float32Encoder = (floatEncoder(32)).encode
+	float64Encoder = (floatEncoder(64)).encode
+)
+
+func stringEncoder(e *encodeState, v reflect.Value, quoted bool) {
+	if v.Type() == numberType {
+		numStr := v.String()
+		// In Go1.5 the empty string encodes to "0", while this is not a valid number literal
+		// we keep compatibility so check validity after this.
+		if numStr == "" {
+			numStr = "0" // Number's zero-val
+		}
+		if !isValidNumber(numStr) {
+			e.error(fmt.Errorf("json: invalid number literal %q", numStr))
+		}
+		e.WriteString(numStr)
+		return
+	}
+	if quoted {
+		sb, err := Marshal(v.String())
+		if err != nil {
+			e.error(err)
+		}
+		e.string(string(sb))
+	} else {
+		e.string(v.String())
+	}
+}
+
+func interfaceEncoder(e *encodeState, v reflect.Value, quoted bool) {
+	if v.IsNil() {
+		e.WriteString("null")
+		return
+	}
+	e.reflectValue(v.Elem())
+}
+
+func unsupportedTypeEncoder(e *encodeState, v reflect.Value, quoted bool) {
+	e.error(&UnsupportedTypeError{v.Type()})
+}
+
+type structEncoder struct {
+	fields    []field
+	fieldEncs []encoderFunc
+}
+
+func (se *structEncoder) encode(e *encodeState, v reflect.Value, quoted bool) {
+	e.WriteByte('{')
+	first := true
+	for i, f := range se.fields {
+		fv := fieldByIndex(v, f.index)
+		if !fv.IsValid() || f.omitEmpty && isEmptyValue(fv) {
+			continue
+		}
+		if first {
+			first = false
+		} else {
+			e.WriteByte(',')
+		}
+		e.string(f.name)
+		e.WriteByte(':')
+		se.fieldEncs[i](e, fv, f.quoted)
+	}
+	e.WriteByte('}')
+}
+
+func newStructEncoder(t reflect.Type) encoderFunc {
+	fields := cachedTypeFields(t)
+	se := &structEncoder{
+		fields:    fields,
+		fieldEncs: make([]encoderFunc, len(fields)),
+	}
+	for i, f := range fields {
+		se.fieldEncs[i] = typeEncoder(typeByIndex(t, f.index))
+	}
+	return se.encode
+}
+
+type mapEncoder struct {
+	elemEnc encoderFunc
+}
+
+func (me *mapEncoder) encode(e *encodeState, v reflect.Value, _ bool) {
+	if v.IsNil() {
+		e.WriteString("null")
+		return
+	}
+	e.WriteByte('{')
+	var sv stringValues = v.MapKeys()
+	sort.Sort(sv)
+	for i, k := range sv {
+		if i > 0 {
+			e.WriteByte(',')
+		}
+		e.string(k.String())
+		e.WriteByte(':')
+		me.elemEnc(e, v.MapIndex(k), false)
+	}
+	e.WriteByte('}')
+}
+
+func newMapEncoder(t reflect.Type) encoderFunc {
+	if t.Key().Kind() != reflect.String {
+		return unsupportedTypeEncoder
+	}
+	me := &mapEncoder{typeEncoder(t.Elem())}
+	return me.encode
+}
+
+func encodeByteSlice(e *encodeState, v reflect.Value, _ bool) {
+	if v.IsNil() {
+		e.WriteString("null")
+		return
+	}
+	s := v.Bytes()
+	e.WriteByte('"')
+	if len(s) < 1024 {
+		// for small buffers, using Encode directly is much faster.
+		dst := make([]byte, base64.StdEncoding.EncodedLen(len(s)))
+		base64.StdEncoding.Encode(dst, s)
+		e.Write(dst)
+	} else {
+		// for large buffers, avoid unnecessary extra temporary
+		// buffer space.
+		enc := base64.NewEncoder(base64.StdEncoding, e)
+		_, _ = enc.Write(s)
+		enc.Close()
+	}
+	e.WriteByte('"')
+}
+
+// sliceEncoder just wraps an arrayEncoder, checking to make sure the value isn't nil.
+type sliceEncoder struct {
+	arrayEnc encoderFunc
+}
+
+func (se *sliceEncoder) encode(e *encodeState, v reflect.Value, _ bool) {
+	if v.IsNil() {
+		e.WriteString("null")
+		return
+	}
+	se.arrayEnc(e, v, false)
+}
+
+func newSliceEncoder(t reflect.Type) encoderFunc {
+	// Byte slices get special treatment; arrays don't.
+	if t.Elem().Kind() == reflect.Uint8 {
+		return encodeByteSlice
+	}
+	enc := &sliceEncoder{newArrayEncoder(t)}
+	return enc.encode
+}
+
+type arrayEncoder struct {
+	elemEnc encoderFunc
+}
+
+func (ae *arrayEncoder) encode(e *encodeState, v reflect.Value, _ bool) {
+	e.WriteByte('[')
+	n := v.Len()
+	for i := 0; i < n; i++ {
+		if i > 0 {
+			e.WriteByte(',')
+		}
+		ae.elemEnc(e, v.Index(i), false)
+	}
+	e.WriteByte(']')
+}
+
+func newArrayEncoder(t reflect.Type) encoderFunc {
+	enc := &arrayEncoder{typeEncoder(t.Elem())}
+	return enc.encode
+}
+
+type ptrEncoder struct {
+	elemEnc encoderFunc
+}
+
+func (pe *ptrEncoder) encode(e *encodeState, v reflect.Value, quoted bool) {
+	if v.IsNil() {
+		e.WriteString("null")
+		return
+	}
+	pe.elemEnc(e, v.Elem(), quoted)
+}
+
+func newPtrEncoder(t reflect.Type) encoderFunc {
+	enc := &ptrEncoder{typeEncoder(t.Elem())}
+	return enc.encode
+}
+
+type condAddrEncoder struct {
+	canAddrEnc, elseEnc encoderFunc
+}
+
+func (ce *condAddrEncoder) encode(e *encodeState, v reflect.Value, quoted bool) {
+	if v.CanAddr() {
+		ce.canAddrEnc(e, v, quoted)
+	} else {
+		ce.elseEnc(e, v, quoted)
+	}
+}
+
+// newCondAddrEncoder returns an encoder that checks whether its value
+// CanAddr and delegates to canAddrEnc if so, else to elseEnc.
+func newCondAddrEncoder(canAddrEnc, elseEnc encoderFunc) encoderFunc {
+	enc := &condAddrEncoder{canAddrEnc: canAddrEnc, elseEnc: elseEnc}
+	return enc.encode
+}
+
+func isValidTag(s string) bool {
+	if s == "" {
+		return false
+	}
+	for _, c := range s {
+		switch {
+		case strings.ContainsRune("!#$%&()*+-./:<=>?@[]^_{|}~ ", c):
+			// Backslash and quote chars are reserved, but
+			// otherwise any punctuation chars are allowed
+			// in a tag name.
+		default:
+			if !unicode.IsLetter(c) && !unicode.IsDigit(c) {
+				return false
+			}
+		}
+	}
+	return true
+}
+
+func fieldByIndex(v reflect.Value, index []int) reflect.Value {
+	for _, i := range index {
+		if v.Kind() == reflect.Ptr {
+			if v.IsNil() {
+				return reflect.Value{}
+			}
+			v = v.Elem()
+		}
+		v = v.Field(i)
+	}
+	return v
+}
+
+func typeByIndex(t reflect.Type, index []int) reflect.Type {
+	for _, i := range index {
+		if t.Kind() == reflect.Ptr {
+			t = t.Elem()
+		}
+		t = t.Field(i).Type
+	}
+	return t
+}
+
+// stringValues is a slice of reflect.Value holding *reflect.StringValue.
+// It implements the methods to sort by string.
+type stringValues []reflect.Value
+
+func (sv stringValues) Len() int           { return len(sv) }
+func (sv stringValues) Swap(i, j int)      { sv[i], sv[j] = sv[j], sv[i] }
+func (sv stringValues) Less(i, j int) bool { return sv.get(i) < sv.get(j) }
+func (sv stringValues) get(i int) string   { return sv[i].String() }
+
+// NOTE: keep in sync with stringBytes below.
+func (e *encodeState) string(s string) int {
+	len0 := e.Len()
+	e.WriteByte('"')
+	start := 0
+	for i := 0; i < len(s); {
+		if b := s[i]; b < utf8.RuneSelf {
+			if 0x20 <= b && b != '\\' && b != '"' && b != '<' && b != '>' && b != '&' {
+				i++
+				continue
+			}
+			if start < i {
+				e.WriteString(s[start:i])
+			}
+			switch b {
+			case '\\', '"':
+				e.WriteByte('\\')
+				e.WriteByte(b)
+			case '\n':
+				e.WriteByte('\\')
+				e.WriteByte('n')
+			case '\r':
+				e.WriteByte('\\')
+				e.WriteByte('r')
+			case '\t':
+				e.WriteByte('\\')
+				e.WriteByte('t')
+			default:
+				// This encodes bytes < 0x20 except for \n and \r,
+				// as well as <, > and &. The latter are escaped because they
+				// can lead to security holes when user-controlled strings
+				// are rendered into JSON and served to some browsers.
+				e.WriteString(`\u00`)
+				e.WriteByte(hex[b>>4])
+				e.WriteByte(hex[b&0xF])
+			}
+			i++
+			start = i
+			continue
+		}
+		c, size := utf8.DecodeRuneInString(s[i:])
+		if c == utf8.RuneError && size == 1 {
+			if start < i {
+				e.WriteString(s[start:i])
+			}
+			e.WriteString(`\ufffd`)
+			i += size
+			start = i
+			continue
+		}
+		// U+2028 is LINE SEPARATOR.
+		// U+2029 is PARAGRAPH SEPARATOR.
+		// They are both technically valid characters in JSON strings,
+		// but don't work in JSONP, which has to be evaluated as JavaScript,
+		// and can lead to security holes there. It is valid JSON to
+		// escape them, so we do so unconditionally.
+		// See http://timelessrepo.com/json-isnt-a-javascript-subset for discussion.
+		if c == '\u2028' || c == '\u2029' {
+			if start < i {
+				e.WriteString(s[start:i])
+			}
+			e.WriteString(`\u202`)
+			e.WriteByte(hex[c&0xF])
+			i += size
+			start = i
+			continue
+		}
+		i += size
+	}
+	if start < len(s) {
+		e.WriteString(s[start:])
+	}
+	e.WriteByte('"')
+	return e.Len() - len0
+}
+
+// NOTE: keep in sync with string above.
+func (e *encodeState) stringBytes(s []byte) int {
+	len0 := e.Len()
+	e.WriteByte('"')
+	start := 0
+	for i := 0; i < len(s); {
+		if b := s[i]; b < utf8.RuneSelf {
+			if 0x20 <= b && b != '\\' && b != '"' && b != '<' && b != '>' && b != '&' {
+				i++
+				continue
+			}
+			if start < i {
+				e.Write(s[start:i])
+			}
+			switch b {
+			case '\\', '"':
+				e.WriteByte('\\')
+				e.WriteByte(b)
+			case '\n':
+				e.WriteByte('\\')
+				e.WriteByte('n')
+			case '\r':
+				e.WriteByte('\\')
+				e.WriteByte('r')
+			case '\t':
+				e.WriteByte('\\')
+				e.WriteByte('t')
+			default:
+				// This encodes bytes < 0x20 except for \n and \r,
+				// as well as <, >, and &. The latter are escaped because they
+				// can lead to security holes when user-controlled strings
+				// are rendered into JSON and served to some browsers.
+				e.WriteString(`\u00`)
+				e.WriteByte(hex[b>>4])
+				e.WriteByte(hex[b&0xF])
+			}
+			i++
+			start = i
+			continue
+		}
+		c, size := utf8.DecodeRune(s[i:])
+		if c == utf8.RuneError && size == 1 {
+			if start < i {
+				e.Write(s[start:i])
+			}
+			e.WriteString(`\ufffd`)
+			i += size
+			start = i
+			continue
+		}
+		// U+2028 is LINE SEPARATOR.
+		// U+2029 is PARAGRAPH SEPARATOR.
+		// They are both technically valid characters in JSON strings,
+		// but don't work in JSONP, which has to be evaluated as JavaScript,
+		// and can lead to security holes there. It is valid JSON to
+		// escape them, so we do so unconditionally.
+		// See http://timelessrepo.com/json-isnt-a-javascript-subset for discussion.
+		if c == '\u2028' || c == '\u2029' {
+			if start < i {
+				e.Write(s[start:i])
+			}
+			e.WriteString(`\u202`)
+			e.WriteByte(hex[c&0xF])
+			i += size
+			start = i
+			continue
+		}
+		i += size
+	}
+	if start < len(s) {
+		e.Write(s[start:])
+	}
+	e.WriteByte('"')
+	return e.Len() - len0
+}
+
+// A field represents a single field found in a struct.
+type field struct {
+	name      string
+	nameBytes []byte // []byte(name)
+
+	tag       bool
+	index     []int
+	typ       reflect.Type
+	omitEmpty bool
+	quoted    bool
+}
+
+func fillField(f field) field {
+	f.nameBytes = []byte(f.name)
+	return f
+}
+
+// byName sorts field by name, breaking ties with depth,
+// then breaking ties with "name came from json tag", then
+// breaking ties with index sequence.
+type byName []field
+
+func (x byName) Len() int { return len(x) }
+
+func (x byName) Swap(i, j int) { x[i], x[j] = x[j], x[i] }
+
+func (x byName) Less(i, j int) bool {
+	if x[i].name != x[j].name {
+		return x[i].name < x[j].name
+	}
+	if len(x[i].index) != len(x[j].index) {
+		return len(x[i].index) < len(x[j].index)
+	}
+	if x[i].tag != x[j].tag {
+		return x[i].tag
+	}
+	return byIndex(x).Less(i, j)
+}
+
+// byIndex sorts field by index sequence.
+type byIndex []field
+
+func (x byIndex) Len() int { return len(x) }
+
+func (x byIndex) Swap(i, j int) { x[i], x[j] = x[j], x[i] }
+
+func (x byIndex) Less(i, j int) bool {
+	for k, xik := range x[i].index {
+		if k >= len(x[j].index) {
+			return false
+		}
+		if xik != x[j].index[k] {
+			return xik < x[j].index[k]
+		}
+	}
+	return len(x[i].index) < len(x[j].index)
+}
+
+// typeFields returns a list of fields that JSON should recognize for the given type.
+// The algorithm is breadth-first search over the set of structs to include - the top struct
+// and then any reachable anonymous structs.
+func typeFields(t reflect.Type) []field {
+	// Anonymous fields to explore at the current level and the next.
+	current := []field{}
+	next := []field{{typ: t}}
+
+	// Count of queued names for current level and the next.
+	count := map[reflect.Type]int{}
+	nextCount := map[reflect.Type]int{}
+
+	// Types already visited at an earlier level.
+	visited := map[reflect.Type]bool{}
+
+	// Fields found.
+	var fields []field
+
+	for len(next) > 0 {
+		current, next = next, current[:0]
+		count, nextCount = nextCount, map[reflect.Type]int{}
+
+		for _, f := range current {
+			if visited[f.typ] {
+				continue
+			}
+			visited[f.typ] = true
+
+			// Scan f.typ for fields to include.
+			for i := 0; i < f.typ.NumField(); i++ {
+				sf := f.typ.Field(i)
+				if sf.PkgPath != "" && !sf.Anonymous { // unexported
+					continue
+				}
+				tag := sf.Tag.Get("json")
+				if tag == "-" {
+					continue
+				}
+				name, opts := parseTag(tag)
+				if !isValidTag(name) {
+					name = ""
+				}
+				index := make([]int, len(f.index)+1)
+				copy(index, f.index)
+				index[len(f.index)] = i
+
+				ft := sf.Type
+				if ft.Name() == "" && ft.Kind() == reflect.Ptr {
+					// Follow pointer.
+					ft = ft.Elem()
+				}
+
+				// Only strings, floats, integers, and booleans can be quoted.
+				quoted := false
+				if opts.Contains("string") {
+					switch ft.Kind() {
+					case reflect.Bool,
+						reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64,
+						reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64,
+						reflect.Float32, reflect.Float64,
+						reflect.String:
+						quoted = true
+					}
+				}
+
+				// Record found field and index sequence.
+				if name != "" || !sf.Anonymous || ft.Kind() != reflect.Struct {
+					tagged := name != ""
+					if name == "" {
+						name = sf.Name
+					}
+					fields = append(fields, fillField(field{
+						name:      name,
+						tag:       tagged,
+						index:     index,
+						typ:       ft,
+						omitEmpty: opts.Contains("omitempty"),
+						quoted:    quoted,
+					}))
+					if count[f.typ] > 1 {
+						// If there were multiple instances, add a second,
+						// so that the annihilation code will see a duplicate.
+						// It only cares about the distinction between 1 or 2,
+						// so don't bother generating any more copies.
+						fields = append(fields, fields[len(fields)-1])
+					}
+					continue
+				}
+
+				// Record new anonymous struct to explore in next round.
+				nextCount[ft]++
+				if nextCount[ft] == 1 {
+					next = append(next, fillField(field{name: ft.Name(), index: index, typ: ft}))
+				}
+			}
+		}
+	}
+
+	sort.Sort(byName(fields))
+
+	// Delete all fields that are hidden by the Go rules for embedded fields,
+	// except that fields with JSON tags are promoted.
+
+	// The fields are sorted in primary order of name, secondary order
+	// of field index length. Loop over names; for each name, delete
+	// hidden fields by choosing the one dominant field that survives.
+	out := fields[:0]
+	for advance, i := 0, 0; i < len(fields); i += advance {
+		// One iteration per name.
+		// Find the sequence of fields with the name of this first field.
+		fi := fields[i]
+		name := fi.name
+		for advance = 1; i+advance < len(fields); advance++ {
+			fj := fields[i+advance]
+			if fj.name != name {
+				break
+			}
+		}
+		if advance == 1 { // Only one field with this name
+			out = append(out, fi)
+			continue
+		}
+		dominant, ok := dominantField(fields[i : i+advance])
+		if ok {
+			out = append(out, dominant)
+		}
+	}
+
+	fields = out
+	sort.Sort(byIndex(fields))
+
+	return fields
+}
+
+// dominantField looks through the fields, all of which are known to
+// have the same name, to find the single field that dominates the
+// others using Go's embedding rules, modified by the presence of
+// JSON tags. If there are multiple top-level fields, the boolean
+// will be false: This condition is an error in Go and we skip all
+// the fields.
+func dominantField(fields []field) (field, bool) {
+	// The fields are sorted in increasing index-length order. The winner
+	// must therefore be one with the shortest index length. Drop all
+	// longer entries, which is easy: just truncate the slice.
+	length := len(fields[0].index)
+	tagged := -1 // Index of first tagged field.
+	for i, f := range fields {
+		if len(f.index) > length {
+			fields = fields[:i]
+			break
+		}
+		if f.tag {
+			if tagged >= 0 {
+				// Multiple tagged fields at the same level: conflict.
+				// Return no field.
+				return field{}, false
+			}
+			tagged = i
+		}
+	}
+	if tagged >= 0 {
+		return fields[tagged], true
+	}
+	// All remaining fields have the same length. If there's more than one,
+	// we have a conflict (two fields named "X" at the same level) and we
+	// return no field.
+	if len(fields) > 1 {
+		return field{}, false
+	}
+	return fields[0], true
+}
+
+var fieldCache struct {
+	sync.RWMutex
+	m map[reflect.Type][]field
+}
+
+// cachedTypeFields is like typeFields but uses a cache to avoid repeated work.
+func cachedTypeFields(t reflect.Type) []field {
+	fieldCache.RLock()
+	f := fieldCache.m[t]
+	fieldCache.RUnlock()
+	if f != nil {
+		return f
+	}
+
+	// Compute fields without lock.
+	// Might duplicate effort but won't hold other computations back.
+	f = typeFields(t)
+	if f == nil {
+		f = []field{}
+	}
+
+	fieldCache.Lock()
+	if fieldCache.m == nil {
+		fieldCache.m = map[reflect.Type][]field{}
+	}
+	fieldCache.m[t] = f
+	fieldCache.Unlock()
+	return f
+}
diff --git a/vendor/github.com/go-jose/go-jose/v3/json/indent.go b/vendor/github.com/go-jose/go-jose/v3/json/indent.go
new file mode 100644
index 0000000000..7cd9f4db18
--- /dev/null
+++ b/vendor/github.com/go-jose/go-jose/v3/json/indent.go
@@ -0,0 +1,141 @@
+// Copyright 2010 The Go Authors.  All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package json
+
+import "bytes"
+
+// Compact appends to dst the JSON-encoded src with
+// insignificant space characters elided.
+func Compact(dst *bytes.Buffer, src []byte) error {
+	return compact(dst, src, false)
+}
+
+func compact(dst *bytes.Buffer, src []byte, escape bool) error {
+	origLen := dst.Len()
+	var scan scanner
+	scan.reset()
+	start := 0
+	for i, c := range src {
+		if escape && (c == '<' || c == '>' || c == '&') {
+			if start < i {
+				dst.Write(src[start:i])
+			}
+			dst.WriteString(`\u00`)
+			dst.WriteByte(hex[c>>4])
+			dst.WriteByte(hex[c&0xF])
+			start = i + 1
+		}
+		// Convert U+2028 and U+2029 (E2 80 A8 and E2 80 A9).
+		if c == 0xE2 && i+2 < len(src) && src[i+1] == 0x80 && src[i+2]&^1 == 0xA8 {
+			if start < i {
+				dst.Write(src[start:i])
+			}
+			dst.WriteString(`\u202`)
+			dst.WriteByte(hex[src[i+2]&0xF])
+			start = i + 3
+		}
+		v := scan.step(&scan, c)
+		if v >= scanSkipSpace {
+			if v == scanError {
+				break
+			}
+			if start < i {
+				dst.Write(src[start:i])
+			}
+			start = i + 1
+		}
+	}
+	if scan.eof() == scanError {
+		dst.Truncate(origLen)
+		return scan.err
+	}
+	if start < len(src) {
+		dst.Write(src[start:])
+	}
+	return nil
+}
+
+func newline(dst *bytes.Buffer, prefix, indent string, depth int) {
+	dst.WriteByte('\n')
+	dst.WriteString(prefix)
+	for i := 0; i < depth; i++ {
+		dst.WriteString(indent)
+	}
+}
+
+// Indent appends to dst an indented form of the JSON-encoded src.
+// Each element in a JSON object or array begins on a new,
+// indented line beginning with prefix followed by one or more
+// copies of indent according to the indentation nesting.
+// The data appended to dst does not begin with the prefix nor
+// any indentation, to make it easier to embed inside other formatted JSON data.
+// Although leading space characters (space, tab, carriage return, newline)
+// at the beginning of src are dropped, trailing space characters
+// at the end of src are preserved and copied to dst.
+// For example, if src has no trailing spaces, neither will dst;
+// if src ends in a trailing newline, so will dst.
+func Indent(dst *bytes.Buffer, src []byte, prefix, indent string) error {
+	origLen := dst.Len()
+	var scan scanner
+	scan.reset()
+	needIndent := false
+	depth := 0
+	for _, c := range src {
+		scan.bytes++
+		v := scan.step(&scan, c)
+		if v == scanSkipSpace {
+			continue
+		}
+		if v == scanError {
+			break
+		}
+		if needIndent && v != scanEndObject && v != scanEndArray {
+			needIndent = false
+			depth++
+			newline(dst, prefix, indent, depth)
+		}
+
+		// Emit semantically uninteresting bytes
+		// (in particular, punctuation in strings) unmodified.
+		if v == scanContinue {
+			dst.WriteByte(c)
+			continue
+		}
+
+		// Add spacing around real punctuation.
+		switch c {
+		case '{', '[':
+			// delay indent so that empty object and array are formatted as {} and [].
+			needIndent = true
+			dst.WriteByte(c)
+
+		case ',':
+			dst.WriteByte(c)
+			newline(dst, prefix, indent, depth)
+
+		case ':':
+			dst.WriteByte(c)
+			dst.WriteByte(' ')
+
+		case '}', ']':
+			if needIndent {
+				// suppress indent in empty object/array
+				needIndent = false
+			} else {
+				depth--
+				newline(dst, prefix, indent, depth)
+			}
+			dst.WriteByte(c)
+
+		default:
+			dst.WriteByte(c)
+		}
+	}
+	if scan.eof() == scanError {
+		dst.Truncate(origLen)
+		return scan.err
+	}
+	return nil
+}
diff --git a/vendor/github.com/go-jose/go-jose/v3/json/scanner.go b/vendor/github.com/go-jose/go-jose/v3/json/scanner.go
new file mode 100644
index 0000000000..ee6622e8cf
--- /dev/null
+++ b/vendor/github.com/go-jose/go-jose/v3/json/scanner.go
@@ -0,0 +1,623 @@
+// Copyright 2010 The Go Authors.  All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package json
+
+// JSON value parser state machine.
+// Just about at the limit of what is reasonable to write by hand.
+// Some parts are a bit tedious, but overall it nicely factors out the
+// otherwise common code from the multiple scanning functions
+// in this package (Compact, Indent, checkValid, nextValue, etc).
+//
+// This file starts with two simple examples using the scanner
+// before diving into the scanner itself.
+
+import "strconv"
+
+// checkValid verifies that data is valid JSON-encoded data.
+// scan is passed in for use by checkValid to avoid an allocation.
+func checkValid(data []byte, scan *scanner) error {
+	scan.reset()
+	for _, c := range data {
+		scan.bytes++
+		if scan.step(scan, c) == scanError {
+			return scan.err
+		}
+	}
+	if scan.eof() == scanError {
+		return scan.err
+	}
+	return nil
+}
+
+// nextValue splits data after the next whole JSON value,
+// returning that value and the bytes that follow it as separate slices.
+// scan is passed in for use by nextValue to avoid an allocation.
+func nextValue(data []byte, scan *scanner) (value, rest []byte, err error) {
+	scan.reset()
+	for i, c := range data {
+		v := scan.step(scan, c)
+		if v >= scanEndObject {
+			switch v {
+			// probe the scanner with a space to determine whether we will
+			// get scanEnd on the next character. Otherwise, if the next character
+			// is not a space, scanEndTop allocates a needless error.
+			case scanEndObject, scanEndArray:
+				if scan.step(scan, ' ') == scanEnd {
+					return data[:i+1], data[i+1:], nil
+				}
+			case scanError:
+				return nil, nil, scan.err
+			case scanEnd:
+				return data[:i], data[i:], nil
+			}
+		}
+	}
+	if scan.eof() == scanError {
+		return nil, nil, scan.err
+	}
+	return data, nil, nil
+}
+
+// A SyntaxError is a description of a JSON syntax error.
+type SyntaxError struct {
+	msg    string // description of error
+	Offset int64  // error occurred after reading Offset bytes
+}
+
+func (e *SyntaxError) Error() string { return e.msg }
+
+// A scanner is a JSON scanning state machine.
+// Callers call scan.reset() and then pass bytes in one at a time
+// by calling scan.step(&scan, c) for each byte.
+// The return value, referred to as an opcode, tells the
+// caller about significant parsing events like beginning
+// and ending literals, objects, and arrays, so that the
+// caller can follow along if it wishes.
+// The return value scanEnd indicates that a single top-level
+// JSON value has been completed, *before* the byte that
+// just got passed in.  (The indication must be delayed in order
+// to recognize the end of numbers: is 123 a whole value or
+// the beginning of 12345e+6?).
+type scanner struct {
+	// The step is a func to be called to execute the next transition.
+	// Also tried using an integer constant and a single func
+	// with a switch, but using the func directly was 10% faster
+	// on a 64-bit Mac Mini, and it's nicer to read.
+	step func(*scanner, byte) int
+
+	// Reached end of top-level value.
+	endTop bool
+
+	// Stack of what we're in the middle of - array values, object keys, object values.
+	parseState []int
+
+	// Error that happened, if any.
+	err error
+
+	// 1-byte redo (see undo method)
+	redo      bool
+	redoCode  int
+	redoState func(*scanner, byte) int
+
+	// total bytes consumed, updated by decoder.Decode
+	bytes int64
+}
+
+// These values are returned by the state transition functions
+// assigned to scanner.state and the method scanner.eof.
+// They give details about the current state of the scan that
+// callers might be interested to know about.
+// It is okay to ignore the return value of any particular
+// call to scanner.state: if one call returns scanError,
+// every subsequent call will return scanError too.
+const (
+	// Continue.
+	scanContinue     = iota // uninteresting byte
+	scanBeginLiteral        // end implied by next result != scanContinue
+	scanBeginObject         // begin object
+	scanObjectKey           // just finished object key (string)
+	scanObjectValue         // just finished non-last object value
+	scanEndObject           // end object (implies scanObjectValue if possible)
+	scanBeginArray          // begin array
+	scanArrayValue          // just finished array value
+	scanEndArray            // end array (implies scanArrayValue if possible)
+	scanSkipSpace           // space byte; can skip; known to be last "continue" result
+
+	// Stop.
+	scanEnd   // top-level value ended *before* this byte; known to be first "stop" result
+	scanError // hit an error, scanner.err.
+)
+
+// These values are stored in the parseState stack.
+// They give the current state of a composite value
+// being scanned.  If the parser is inside a nested value
+// the parseState describes the nested state, outermost at entry 0.
+const (
+	parseObjectKey   = iota // parsing object key (before colon)
+	parseObjectValue        // parsing object value (after colon)
+	parseArrayValue         // parsing array value
+)
+
+// reset prepares the scanner for use.
+// It must be called before calling s.step.
+func (s *scanner) reset() {
+	s.step = stateBeginValue
+	s.parseState = s.parseState[0:0]
+	s.err = nil
+	s.redo = false
+	s.endTop = false
+}
+
+// eof tells the scanner that the end of input has been reached.
+// It returns a scan status just as s.step does.
+func (s *scanner) eof() int {
+	if s.err != nil {
+		return scanError
+	}
+	if s.endTop {
+		return scanEnd
+	}
+	s.step(s, ' ')
+	if s.endTop {
+		return scanEnd
+	}
+	if s.err == nil {
+		s.err = &SyntaxError{"unexpected end of JSON input", s.bytes}
+	}
+	return scanError
+}
+
+// pushParseState pushes a new parse state p onto the parse stack.
+func (s *scanner) pushParseState(p int) {
+	s.parseState = append(s.parseState, p)
+}
+
+// popParseState pops a parse state (already obtained) off the stack
+// and updates s.step accordingly.
+func (s *scanner) popParseState() {
+	n := len(s.parseState) - 1
+	s.parseState = s.parseState[0:n]
+	s.redo = false
+	if n == 0 {
+		s.step = stateEndTop
+		s.endTop = true
+	} else {
+		s.step = stateEndValue
+	}
+}
+
+func isSpace(c byte) bool {
+	return c == ' ' || c == '\t' || c == '\r' || c == '\n'
+}
+
+// stateBeginValueOrEmpty is the state after reading `[`.
+func stateBeginValueOrEmpty(s *scanner, c byte) int {
+	if c <= ' ' && isSpace(c) {
+		return scanSkipSpace
+	}
+	if c == ']' {
+		return stateEndValue(s, c)
+	}
+	return stateBeginValue(s, c)
+}
+
+// stateBeginValue is the state at the beginning of the input.
+func stateBeginValue(s *scanner, c byte) int {
+	if c <= ' ' && isSpace(c) {
+		return scanSkipSpace
+	}
+	switch c {
+	case '{':
+		s.step = stateBeginStringOrEmpty
+		s.pushParseState(parseObjectKey)
+		return scanBeginObject
+	case '[':
+		s.step = stateBeginValueOrEmpty
+		s.pushParseState(parseArrayValue)
+		return scanBeginArray
+	case '"':
+		s.step = stateInString
+		return scanBeginLiteral
+	case '-':
+		s.step = stateNeg
+		return scanBeginLiteral
+	case '0': // beginning of 0.123
+		s.step = state0
+		return scanBeginLiteral
+	case 't': // beginning of true
+		s.step = stateT
+		return scanBeginLiteral
+	case 'f': // beginning of false
+		s.step = stateF
+		return scanBeginLiteral
+	case 'n': // beginning of null
+		s.step = stateN
+		return scanBeginLiteral
+	}
+	if '1' <= c && c <= '9' { // beginning of 1234.5
+		s.step = state1
+		return scanBeginLiteral
+	}
+	return s.error(c, "looking for beginning of value")
+}
+
+// stateBeginStringOrEmpty is the state after reading `{`.
+func stateBeginStringOrEmpty(s *scanner, c byte) int {
+	if c <= ' ' && isSpace(c) {
+		return scanSkipSpace
+	}
+	if c == '}' {
+		n := len(s.parseState)
+		s.parseState[n-1] = parseObjectValue
+		return stateEndValue(s, c)
+	}
+	return stateBeginString(s, c)
+}
+
+// stateBeginString is the state after reading `{"key": value,`.
+func stateBeginString(s *scanner, c byte) int {
+	if c <= ' ' && isSpace(c) {
+		return scanSkipSpace
+	}
+	if c == '"' {
+		s.step = stateInString
+		return scanBeginLiteral
+	}
+	return s.error(c, "looking for beginning of object key string")
+}
+
+// stateEndValue is the state after completing a value,
+// such as after reading `{}` or `true` or `["x"`.
+func stateEndValue(s *scanner, c byte) int {
+	n := len(s.parseState)
+	if n == 0 {
+		// Completed top-level before the current byte.
+		s.step = stateEndTop
+		s.endTop = true
+		return stateEndTop(s, c)
+	}
+	if c <= ' ' && isSpace(c) {
+		s.step = stateEndValue
+		return scanSkipSpace
+	}
+	ps := s.parseState[n-1]
+	switch ps {
+	case parseObjectKey:
+		if c == ':' {
+			s.parseState[n-1] = parseObjectValue
+			s.step = stateBeginValue
+			return scanObjectKey
+		}
+		return s.error(c, "after object key")
+	case parseObjectValue:
+		if c == ',' {
+			s.parseState[n-1] = parseObjectKey
+			s.step = stateBeginString
+			return scanObjectValue
+		}
+		if c == '}' {
+			s.popParseState()
+			return scanEndObject
+		}
+		return s.error(c, "after object key:value pair")
+	case parseArrayValue:
+		if c == ',' {
+			s.step = stateBeginValue
+			return scanArrayValue
+		}
+		if c == ']' {
+			s.popParseState()
+			return scanEndArray
+		}
+		return s.error(c, "after array element")
+	}
+	return s.error(c, "")
+}
+
+// stateEndTop is the state after finishing the top-level value,
+// such as after reading `{}` or `[1,2,3]`.
+// Only space characters should be seen now.
+func stateEndTop(s *scanner, c byte) int {
+	if c != ' ' && c != '\t' && c != '\r' && c != '\n' {
+		// Complain about non-space byte on next call.
+		s.error(c, "after top-level value")
+	}
+	return scanEnd
+}
+
+// stateInString is the state after reading `"`.
+func stateInString(s *scanner, c byte) int {
+	if c == '"' {
+		s.step = stateEndValue
+		return scanContinue
+	}
+	if c == '\\' {
+		s.step = stateInStringEsc
+		return scanContinue
+	}
+	if c < 0x20 {
+		return s.error(c, "in string literal")
+	}
+	return scanContinue
+}
+
+// stateInStringEsc is the state after reading `"\` during a quoted string.
+func stateInStringEsc(s *scanner, c byte) int {
+	switch c {
+	case 'b', 'f', 'n', 'r', 't', '\\', '/', '"':
+		s.step = stateInString
+		return scanContinue
+	case 'u':
+		s.step = stateInStringEscU
+		return scanContinue
+	}
+	return s.error(c, "in string escape code")
+}
+
+// stateInStringEscU is the state after reading `"\u` during a quoted string.
+func stateInStringEscU(s *scanner, c byte) int {
+	if '0' <= c && c <= '9' || 'a' <= c && c <= 'f' || 'A' <= c && c <= 'F' {
+		s.step = stateInStringEscU1
+		return scanContinue
+	}
+	// numbers
+	return s.error(c, "in \\u hexadecimal character escape")
+}
+
+// stateInStringEscU1 is the state after reading `"\u1` during a quoted string.
+func stateInStringEscU1(s *scanner, c byte) int {
+	if '0' <= c && c <= '9' || 'a' <= c && c <= 'f' || 'A' <= c && c <= 'F' {
+		s.step = stateInStringEscU12
+		return scanContinue
+	}
+	// numbers
+	return s.error(c, "in \\u hexadecimal character escape")
+}
+
+// stateInStringEscU12 is the state after reading `"\u12` during a quoted string.
+func stateInStringEscU12(s *scanner, c byte) int {
+	if '0' <= c && c <= '9' || 'a' <= c && c <= 'f' || 'A' <= c && c <= 'F' {
+		s.step = stateInStringEscU123
+		return scanContinue
+	}
+	// numbers
+	return s.error(c, "in \\u hexadecimal character escape")
+}
+
+// stateInStringEscU123 is the state after reading `"\u123` during a quoted string.
+func stateInStringEscU123(s *scanner, c byte) int {
+	if '0' <= c && c <= '9' || 'a' <= c && c <= 'f' || 'A' <= c && c <= 'F' {
+		s.step = stateInString
+		return scanContinue
+	}
+	// numbers
+	return s.error(c, "in \\u hexadecimal character escape")
+}
+
+// stateNeg is the state after reading `-` during a number.
+func stateNeg(s *scanner, c byte) int {
+	if c == '0' {
+		s.step = state0
+		return scanContinue
+	}
+	if '1' <= c && c <= '9' {
+		s.step = state1
+		return scanContinue
+	}
+	return s.error(c, "in numeric literal")
+}
+
+// state1 is the state after reading a non-zero integer during a number,
+// such as after reading `1` or `100` but not `0`.
+func state1(s *scanner, c byte) int {
+	if '0' <= c && c <= '9' {
+		s.step = state1
+		return scanContinue
+	}
+	return state0(s, c)
+}
+
+// state0 is the state after reading `0` during a number.
+func state0(s *scanner, c byte) int {
+	if c == '.' {
+		s.step = stateDot
+		return scanContinue
+	}
+	if c == 'e' || c == 'E' {
+		s.step = stateE
+		return scanContinue
+	}
+	return stateEndValue(s, c)
+}
+
+// stateDot is the state after reading the integer and decimal point in a number,
+// such as after reading `1.`.
+func stateDot(s *scanner, c byte) int {
+	if '0' <= c && c <= '9' {
+		s.step = stateDot0
+		return scanContinue
+	}
+	return s.error(c, "after decimal point in numeric literal")
+}
+
+// stateDot0 is the state after reading the integer, decimal point, and subsequent
+// digits of a number, such as after reading `3.14`.
+func stateDot0(s *scanner, c byte) int {
+	if '0' <= c && c <= '9' {
+		return scanContinue
+	}
+	if c == 'e' || c == 'E' {
+		s.step = stateE
+		return scanContinue
+	}
+	return stateEndValue(s, c)
+}
+
+// stateE is the state after reading the mantissa and e in a number,
+// such as after reading `314e` or `0.314e`.
+func stateE(s *scanner, c byte) int {
+	if c == '+' || c == '-' {
+		s.step = stateESign
+		return scanContinue
+	}
+	return stateESign(s, c)
+}
+
+// stateESign is the state after reading the mantissa, e, and sign in a number,
+// such as after reading `314e-` or `0.314e+`.
+func stateESign(s *scanner, c byte) int {
+	if '0' <= c && c <= '9' {
+		s.step = stateE0
+		return scanContinue
+	}
+	return s.error(c, "in exponent of numeric literal")
+}
+
+// stateE0 is the state after reading the mantissa, e, optional sign,
+// and at least one digit of the exponent in a number,
+// such as after reading `314e-2` or `0.314e+1` or `3.14e0`.
+func stateE0(s *scanner, c byte) int {
+	if '0' <= c && c <= '9' {
+		return scanContinue
+	}
+	return stateEndValue(s, c)
+}
+
+// stateT is the state after reading `t`.
+func stateT(s *scanner, c byte) int {
+	if c == 'r' {
+		s.step = stateTr
+		return scanContinue
+	}
+	return s.error(c, "in literal true (expecting 'r')")
+}
+
+// stateTr is the state after reading `tr`.
+func stateTr(s *scanner, c byte) int {
+	if c == 'u' {
+		s.step = stateTru
+		return scanContinue
+	}
+	return s.error(c, "in literal true (expecting 'u')")
+}
+
+// stateTru is the state after reading `tru`.
+func stateTru(s *scanner, c byte) int {
+	if c == 'e' {
+		s.step = stateEndValue
+		return scanContinue
+	}
+	return s.error(c, "in literal true (expecting 'e')")
+}
+
+// stateF is the state after reading `f`.
+func stateF(s *scanner, c byte) int {
+	if c == 'a' {
+		s.step = stateFa
+		return scanContinue
+	}
+	return s.error(c, "in literal false (expecting 'a')")
+}
+
+// stateFa is the state after reading `fa`.
+func stateFa(s *scanner, c byte) int {
+	if c == 'l' {
+		s.step = stateFal
+		return scanContinue
+	}
+	return s.error(c, "in literal false (expecting 'l')")
+}
+
+// stateFal is the state after reading `fal`.
+func stateFal(s *scanner, c byte) int {
+	if c == 's' {
+		s.step = stateFals
+		return scanContinue
+	}
+	return s.error(c, "in literal false (expecting 's')")
+}
+
+// stateFals is the state after reading `fals`.
+func stateFals(s *scanner, c byte) int {
+	if c == 'e' {
+		s.step = stateEndValue
+		return scanContinue
+	}
+	return s.error(c, "in literal false (expecting 'e')")
+}
+
+// stateN is the state after reading `n`.
+func stateN(s *scanner, c byte) int {
+	if c == 'u' {
+		s.step = stateNu
+		return scanContinue
+	}
+	return s.error(c, "in literal null (expecting 'u')")
+}
+
+// stateNu is the state after reading `nu`.
+func stateNu(s *scanner, c byte) int {
+	if c == 'l' {
+		s.step = stateNul
+		return scanContinue
+	}
+	return s.error(c, "in literal null (expecting 'l')")
+}
+
+// stateNul is the state after reading `nul`.
+func stateNul(s *scanner, c byte) int {
+	if c == 'l' {
+		s.step = stateEndValue
+		return scanContinue
+	}
+	return s.error(c, "in literal null (expecting 'l')")
+}
+
+// stateError is the state after reaching a syntax error,
+// such as after reading `[1}` or `5.1.2`.
+func stateError(s *scanner, c byte) int {
+	return scanError
+}
+
+// error records an error and switches to the error state.
+func (s *scanner) error(c byte, context string) int {
+	s.step = stateError
+	s.err = &SyntaxError{"invalid character " + quoteChar(c) + " " + context, s.bytes}
+	return scanError
+}
+
+// quoteChar formats c as a quoted character literal
+func quoteChar(c byte) string {
+	// special cases - different from quoted strings
+	if c == '\'' {
+		return `'\''`
+	}
+	if c == '"' {
+		return `'"'`
+	}
+
+	// use quoted string with different quotation marks
+	s := strconv.Quote(string(c))
+	return "'" + s[1:len(s)-1] + "'"
+}
+
+// undo causes the scanner to return scanCode from the next state transition.
+// This gives callers a simple 1-byte undo mechanism.
+func (s *scanner) undo(scanCode int) {
+	if s.redo {
+		panic("json: invalid use of scanner")
+	}
+	s.redoCode = scanCode
+	s.redoState = s.step
+	s.step = stateRedo
+	s.redo = true
+}
+
+// stateRedo helps implement the scanner's 1-byte undo.
+func stateRedo(s *scanner, c byte) int {
+	s.redo = false
+	s.step = s.redoState
+	return s.redoCode
+}
diff --git a/vendor/github.com/go-jose/go-jose/v3/json/stream.go b/vendor/github.com/go-jose/go-jose/v3/json/stream.go
new file mode 100644
index 0000000000..9b2b926b03
--- /dev/null
+++ b/vendor/github.com/go-jose/go-jose/v3/json/stream.go
@@ -0,0 +1,485 @@
+// Copyright 2010 The Go Authors.  All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package json
+
+import (
+	"bytes"
+	"errors"
+	"io"
+)
+
+// A Decoder reads and decodes JSON objects from an input stream.
+type Decoder struct {
+	r     io.Reader
+	buf   []byte
+	d     decodeState
+	scanp int // start of unread data in buf
+	scan  scanner
+	err   error
+
+	tokenState int
+	tokenStack []int
+}
+
+// NewDecoder returns a new decoder that reads from r.
+//
+// The decoder introduces its own buffering and may
+// read data from r beyond the JSON values requested.
+func NewDecoder(r io.Reader) *Decoder {
+	return &Decoder{r: r}
+}
+
+// Deprecated: Use `SetNumberType` instead
+// UseNumber causes the Decoder to unmarshal a number into an interface{} as a
+// Number instead of as a float64.
+func (dec *Decoder) UseNumber() { dec.d.numberType = UnmarshalJSONNumber }
+
+// SetNumberType causes the Decoder to unmarshal a number into an interface{} as a
+// Number, float64 or int64 depending on `t` enum value.
+func (dec *Decoder) SetNumberType(t NumberUnmarshalType) { dec.d.numberType = t }
+
+// Decode reads the next JSON-encoded value from its
+// input and stores it in the value pointed to by v.
+//
+// See the documentation for Unmarshal for details about
+// the conversion of JSON into a Go value.
+func (dec *Decoder) Decode(v interface{}) error {
+	if dec.err != nil {
+		return dec.err
+	}
+
+	if err := dec.tokenPrepareForDecode(); err != nil {
+		return err
+	}
+
+	if !dec.tokenValueAllowed() {
+		return &SyntaxError{msg: "not at beginning of value"}
+	}
+
+	// Read whole value into buffer.
+	n, err := dec.readValue()
+	if err != nil {
+		return err
+	}
+	dec.d.init(dec.buf[dec.scanp : dec.scanp+n])
+	dec.scanp += n
+
+	// Don't save err from unmarshal into dec.err:
+	// the connection is still usable since we read a complete JSON
+	// object from it before the error happened.
+	err = dec.d.unmarshal(v)
+
+	// fixup token streaming state
+	dec.tokenValueEnd()
+
+	return err
+}
+
+// Buffered returns a reader of the data remaining in the Decoder's
+// buffer. The reader is valid until the next call to Decode.
+func (dec *Decoder) Buffered() io.Reader {
+	return bytes.NewReader(dec.buf[dec.scanp:])
+}
+
+// readValue reads a JSON value into dec.buf.
+// It returns the length of the encoding.
+func (dec *Decoder) readValue() (int, error) {
+	dec.scan.reset()
+
+	scanp := dec.scanp
+	var err error
+Input:
+	for {
+		// Look in the buffer for a new value.
+		for i, c := range dec.buf[scanp:] {
+			dec.scan.bytes++
+			v := dec.scan.step(&dec.scan, c)
+			if v == scanEnd {
+				scanp += i
+				break Input
+			}
+			// scanEnd is delayed one byte.
+			// We might block trying to get that byte from src,
+			// so instead invent a space byte.
+			if (v == scanEndObject || v == scanEndArray) && dec.scan.step(&dec.scan, ' ') == scanEnd {
+				scanp += i + 1
+				break Input
+			}
+			if v == scanError {
+				dec.err = dec.scan.err
+				return 0, dec.scan.err
+			}
+		}
+		scanp = len(dec.buf)
+
+		// Did the last read have an error?
+		// Delayed until now to allow buffer scan.
+		if err != nil {
+			if err == io.EOF {
+				if dec.scan.step(&dec.scan, ' ') == scanEnd {
+					break Input
+				}
+				if nonSpace(dec.buf) {
+					err = io.ErrUnexpectedEOF
+				}
+			}
+			dec.err = err
+			return 0, err
+		}
+
+		n := scanp - dec.scanp
+		err = dec.refill()
+		scanp = dec.scanp + n
+	}
+	return scanp - dec.scanp, nil
+}
+
+func (dec *Decoder) refill() error {
+	// Make room to read more into the buffer.
+	// First slide down data already consumed.
+	if dec.scanp > 0 {
+		n := copy(dec.buf, dec.buf[dec.scanp:])
+		dec.buf = dec.buf[:n]
+		dec.scanp = 0
+	}
+
+	// Grow buffer if not large enough.
+	const minRead = 512
+	if cap(dec.buf)-len(dec.buf) < minRead {
+		newBuf := make([]byte, len(dec.buf), 2*cap(dec.buf)+minRead)
+		copy(newBuf, dec.buf)
+		dec.buf = newBuf
+	}
+
+	// Read.  Delay error for next iteration (after scan).
+	n, err := dec.r.Read(dec.buf[len(dec.buf):cap(dec.buf)])
+	dec.buf = dec.buf[0 : len(dec.buf)+n]
+
+	return err
+}
+
+func nonSpace(b []byte) bool {
+	for _, c := range b {
+		if !isSpace(c) {
+			return true
+		}
+	}
+	return false
+}
+
+// An Encoder writes JSON objects to an output stream.
+type Encoder struct {
+	w   io.Writer
+	err error
+}
+
+// NewEncoder returns a new encoder that writes to w.
+func NewEncoder(w io.Writer) *Encoder {
+	return &Encoder{w: w}
+}
+
+// Encode writes the JSON encoding of v to the stream,
+// followed by a newline character.
+//
+// See the documentation for Marshal for details about the
+// conversion of Go values to JSON.
+func (enc *Encoder) Encode(v interface{}) error {
+	if enc.err != nil {
+		return enc.err
+	}
+	e := newEncodeState()
+	err := e.marshal(v)
+	if err != nil {
+		return err
+	}
+
+	// Terminate each value with a newline.
+	// This makes the output look a little nicer
+	// when debugging, and some kind of space
+	// is required if the encoded value was a number,
+	// so that the reader knows there aren't more
+	// digits coming.
+	e.WriteByte('\n')
+
+	if _, err = enc.w.Write(e.Bytes()); err != nil {
+		enc.err = err
+	}
+	encodeStatePool.Put(e)
+	return err
+}
+
+// RawMessage is a raw encoded JSON object.
+// It implements Marshaler and Unmarshaler and can
+// be used to delay JSON decoding or precompute a JSON encoding.
+type RawMessage []byte
+
+// MarshalJSON returns *m as the JSON encoding of m.
+func (m *RawMessage) MarshalJSON() ([]byte, error) {
+	return *m, nil
+}
+
+// UnmarshalJSON sets *m to a copy of data.
+func (m *RawMessage) UnmarshalJSON(data []byte) error {
+	if m == nil {
+		return errors.New("json.RawMessage: UnmarshalJSON on nil pointer")
+	}
+	*m = append((*m)[0:0], data...)
+	return nil
+}
+
+var _ Marshaler = (*RawMessage)(nil)
+var _ Unmarshaler = (*RawMessage)(nil)
+
+// A Token holds a value of one of these types:
+//
+//	Delim, for the four JSON delimiters [ ] { }
+//	bool, for JSON booleans
+//	float64, for JSON numbers
+//	Number, for JSON numbers
+//	string, for JSON string literals
+//	nil, for JSON null
+//
+type Token interface{}
+
+const (
+	tokenTopValue = iota
+	tokenArrayStart
+	tokenArrayValue
+	tokenArrayComma
+	tokenObjectStart
+	tokenObjectKey
+	tokenObjectColon
+	tokenObjectValue
+	tokenObjectComma
+)
+
+// advance tokenstate from a separator state to a value state
+func (dec *Decoder) tokenPrepareForDecode() error {
+	// Note: Not calling peek before switch, to avoid
+	// putting peek into the standard Decode path.
+	// peek is only called when using the Token API.
+	switch dec.tokenState {
+	case tokenArrayComma:
+		c, err := dec.peek()
+		if err != nil {
+			return err
+		}
+		if c != ',' {
+			return &SyntaxError{"expected comma after array element", 0}
+		}
+		dec.scanp++
+		dec.tokenState = tokenArrayValue
+	case tokenObjectColon:
+		c, err := dec.peek()
+		if err != nil {
+			return err
+		}
+		if c != ':' {
+			return &SyntaxError{"expected colon after object key", 0}
+		}
+		dec.scanp++
+		dec.tokenState = tokenObjectValue
+	}
+	return nil
+}
+
+func (dec *Decoder) tokenValueAllowed() bool {
+	switch dec.tokenState {
+	case tokenTopValue, tokenArrayStart, tokenArrayValue, tokenObjectValue:
+		return true
+	}
+	return false
+}
+
+func (dec *Decoder) tokenValueEnd() {
+	switch dec.tokenState {
+	case tokenArrayStart, tokenArrayValue:
+		dec.tokenState = tokenArrayComma
+	case tokenObjectValue:
+		dec.tokenState = tokenObjectComma
+	}
+}
+
+// A Delim is a JSON array or object delimiter, one of [ ] { or }.
+type Delim rune
+
+func (d Delim) String() string {
+	return string(d)
+}
+
+// Token returns the next JSON token in the input stream.
+// At the end of the input stream, Token returns nil, io.EOF.
+//
+// Token guarantees that the delimiters [ ] { } it returns are
+// properly nested and matched: if Token encounters an unexpected
+// delimiter in the input, it will return an error.
+//
+// The input stream consists of basic JSON values—bool, string,
+// number, and null—along with delimiters [ ] { } of type Delim
+// to mark the start and end of arrays and objects.
+// Commas and colons are elided.
+func (dec *Decoder) Token() (Token, error) {
+	for {
+		c, err := dec.peek()
+		if err != nil {
+			return nil, err
+		}
+		switch c {
+		case '[':
+			if !dec.tokenValueAllowed() {
+				return dec.tokenError(c)
+			}
+			dec.scanp++
+			dec.tokenStack = append(dec.tokenStack, dec.tokenState)
+			dec.tokenState = tokenArrayStart
+			return Delim('['), nil
+
+		case ']':
+			if dec.tokenState != tokenArrayStart && dec.tokenState != tokenArrayComma {
+				return dec.tokenError(c)
+			}
+			dec.scanp++
+			dec.tokenState = dec.tokenStack[len(dec.tokenStack)-1]
+			dec.tokenStack = dec.tokenStack[:len(dec.tokenStack)-1]
+			dec.tokenValueEnd()
+			return Delim(']'), nil
+
+		case '{':
+			if !dec.tokenValueAllowed() {
+				return dec.tokenError(c)
+			}
+			dec.scanp++
+			dec.tokenStack = append(dec.tokenStack, dec.tokenState)
+			dec.tokenState = tokenObjectStart
+			return Delim('{'), nil
+
+		case '}':
+			if dec.tokenState != tokenObjectStart && dec.tokenState != tokenObjectComma {
+				return dec.tokenError(c)
+			}
+			dec.scanp++
+			dec.tokenState = dec.tokenStack[len(dec.tokenStack)-1]
+			dec.tokenStack = dec.tokenStack[:len(dec.tokenStack)-1]
+			dec.tokenValueEnd()
+			return Delim('}'), nil
+
+		case ':':
+			if dec.tokenState != tokenObjectColon {
+				return dec.tokenError(c)
+			}
+			dec.scanp++
+			dec.tokenState = tokenObjectValue
+			continue
+
+		case ',':
+			if dec.tokenState == tokenArrayComma {
+				dec.scanp++
+				dec.tokenState = tokenArrayValue
+				continue
+			}
+			if dec.tokenState == tokenObjectComma {
+				dec.scanp++
+				dec.tokenState = tokenObjectKey
+				continue
+			}
+			return dec.tokenError(c)
+
+		case '"':
+			if dec.tokenState == tokenObjectStart || dec.tokenState == tokenObjectKey {
+				var x string
+				old := dec.tokenState
+				dec.tokenState = tokenTopValue
+				err := dec.Decode(&x)
+				dec.tokenState = old
+				if err != nil {
+					clearOffset(err)
+					return nil, err
+				}
+				dec.tokenState = tokenObjectColon
+				return x, nil
+			}
+			fallthrough
+
+		default:
+			if !dec.tokenValueAllowed() {
+				return dec.tokenError(c)
+			}
+			var x interface{}
+			if err := dec.Decode(&x); err != nil {
+				clearOffset(err)
+				return nil, err
+			}
+			return x, nil
+		}
+	}
+}
+
+func clearOffset(err error) {
+	if s, ok := err.(*SyntaxError); ok {
+		s.Offset = 0
+	}
+}
+
+func (dec *Decoder) tokenError(c byte) (Token, error) {
+	var context string
+	switch dec.tokenState {
+	case tokenTopValue:
+		context = " looking for beginning of value"
+	case tokenArrayStart, tokenArrayValue, tokenObjectValue:
+		context = " looking for beginning of value"
+	case tokenArrayComma:
+		context = " after array element"
+	case tokenObjectKey:
+		context = " looking for beginning of object key string"
+	case tokenObjectColon:
+		context = " after object key"
+	case tokenObjectComma:
+		context = " after object key:value pair"
+	}
+	return nil, &SyntaxError{"invalid character " + quoteChar(c) + " " + context, 0}
+}
+
+// More reports whether there is another element in the
+// current array or object being parsed.
+func (dec *Decoder) More() bool {
+	c, err := dec.peek()
+	return err == nil && c != ']' && c != '}'
+}
+
+func (dec *Decoder) peek() (byte, error) {
+	var err error
+	for {
+		for i := dec.scanp; i < len(dec.buf); i++ {
+			c := dec.buf[i]
+			if isSpace(c) {
+				continue
+			}
+			dec.scanp = i
+			return c, nil
+		}
+		// buffer has been scanned, now report any error
+		if err != nil {
+			return 0, err
+		}
+		err = dec.refill()
+	}
+}
+
+/*
+TODO
+
+// EncodeToken writes the given JSON token to the stream.
+// It returns an error if the delimiters [ ] { } are not properly used.
+//
+// EncodeToken does not call Flush, because usually it is part of
+// a larger operation such as Encode, and those will call Flush when finished.
+// Callers that create an Encoder and then invoke EncodeToken directly,
+// without using Encode, need to call Flush when finished to ensure that
+// the JSON is written to the underlying writer.
+func (e *Encoder) EncodeToken(t Token) error  {
+	...
+}
+
+*/
diff --git a/vendor/github.com/go-jose/go-jose/v3/json/tags.go b/vendor/github.com/go-jose/go-jose/v3/json/tags.go
new file mode 100644
index 0000000000..c38fd5102f
--- /dev/null
+++ b/vendor/github.com/go-jose/go-jose/v3/json/tags.go
@@ -0,0 +1,44 @@
+// Copyright 2011 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package json
+
+import (
+	"strings"
+)
+
+// tagOptions is the string following a comma in a struct field's "json"
+// tag, or the empty string. It does not include the leading comma.
+type tagOptions string
+
+// parseTag splits a struct field's json tag into its name and
+// comma-separated options.
+func parseTag(tag string) (string, tagOptions) {
+	if idx := strings.Index(tag, ","); idx != -1 {
+		return tag[:idx], tagOptions(tag[idx+1:])
+	}
+	return tag, tagOptions("")
+}
+
+// Contains reports whether a comma-separated list of options
+// contains a particular substr flag. substr must be surrounded by a
+// string boundary or commas.
+func (o tagOptions) Contains(optionName string) bool {
+	if len(o) == 0 {
+		return false
+	}
+	s := string(o)
+	for s != "" {
+		var next string
+		i := strings.Index(s, ",")
+		if i >= 0 {
+			s, next = s[:i], s[i+1:]
+		}
+		if s == optionName {
+			return true
+		}
+		s = next
+	}
+	return false
+}
diff --git a/vendor/github.com/go-jose/go-jose/v3/jwe.go b/vendor/github.com/go-jose/go-jose/v3/jwe.go
new file mode 100644
index 0000000000..bce3045043
--- /dev/null
+++ b/vendor/github.com/go-jose/go-jose/v3/jwe.go
@@ -0,0 +1,295 @@
+/*-
+ * Copyright 2014 Square Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package jose
+
+import (
+	"encoding/base64"
+	"fmt"
+	"strings"
+
+	"github.com/go-jose/go-jose/v3/json"
+)
+
+// rawJSONWebEncryption represents a raw JWE JSON object. Used for parsing/serializing.
+type rawJSONWebEncryption struct {
+	Protected    *byteBuffer        `json:"protected,omitempty"`
+	Unprotected  *rawHeader         `json:"unprotected,omitempty"`
+	Header       *rawHeader         `json:"header,omitempty"`
+	Recipients   []rawRecipientInfo `json:"recipients,omitempty"`
+	Aad          *byteBuffer        `json:"aad,omitempty"`
+	EncryptedKey *byteBuffer        `json:"encrypted_key,omitempty"`
+	Iv           *byteBuffer        `json:"iv,omitempty"`
+	Ciphertext   *byteBuffer        `json:"ciphertext,omitempty"`
+	Tag          *byteBuffer        `json:"tag,omitempty"`
+}
+
+// rawRecipientInfo represents a raw JWE Per-Recipient header JSON object. Used for parsing/serializing.
+type rawRecipientInfo struct {
+	Header       *rawHeader `json:"header,omitempty"`
+	EncryptedKey string     `json:"encrypted_key,omitempty"`
+}
+
+// JSONWebEncryption represents an encrypted JWE object after parsing.
+type JSONWebEncryption struct {
+	Header                   Header
+	protected, unprotected   *rawHeader
+	recipients               []recipientInfo
+	aad, iv, ciphertext, tag []byte
+	original                 *rawJSONWebEncryption
+}
+
+// recipientInfo represents a raw JWE Per-Recipient header JSON object after parsing.
+type recipientInfo struct {
+	header       *rawHeader
+	encryptedKey []byte
+}
+
+// GetAuthData retrieves the (optional) authenticated data attached to the object.
+func (obj JSONWebEncryption) GetAuthData() []byte {
+	if obj.aad != nil {
+		out := make([]byte, len(obj.aad))
+		copy(out, obj.aad)
+		return out
+	}
+
+	return nil
+}
+
+// Get the merged header values
+func (obj JSONWebEncryption) mergedHeaders(recipient *recipientInfo) rawHeader {
+	out := rawHeader{}
+	out.merge(obj.protected)
+	out.merge(obj.unprotected)
+
+	if recipient != nil {
+		out.merge(recipient.header)
+	}
+
+	return out
+}
+
+// Get the additional authenticated data from a JWE object.
+func (obj JSONWebEncryption) computeAuthData() []byte {
+	var protected string
+
+	switch {
+	case obj.original != nil && obj.original.Protected != nil:
+		protected = obj.original.Protected.base64()
+	case obj.protected != nil:
+		protected = base64.RawURLEncoding.EncodeToString(mustSerializeJSON((obj.protected)))
+	default:
+		protected = ""
+	}
+
+	output := []byte(protected)
+	if obj.aad != nil {
+		output = append(output, '.')
+		output = append(output, []byte(base64.RawURLEncoding.EncodeToString(obj.aad))...)
+	}
+
+	return output
+}
+
+// ParseEncrypted parses an encrypted message in compact or JWE JSON Serialization format.
+func ParseEncrypted(input string) (*JSONWebEncryption, error) {
+	input = stripWhitespace(input)
+	if strings.HasPrefix(input, "{") {
+		return parseEncryptedFull(input)
+	}
+
+	return parseEncryptedCompact(input)
+}
+
+// parseEncryptedFull parses a message in compact format.
+func parseEncryptedFull(input string) (*JSONWebEncryption, error) {
+	var parsed rawJSONWebEncryption
+	err := json.Unmarshal([]byte(input), &parsed)
+	if err != nil {
+		return nil, err
+	}
+
+	return parsed.sanitized()
+}
+
+// sanitized produces a cleaned-up JWE object from the raw JSON.
+func (parsed *rawJSONWebEncryption) sanitized() (*JSONWebEncryption, error) {
+	obj := &JSONWebEncryption{
+		original:    parsed,
+		unprotected: parsed.Unprotected,
+	}
+
+	// Check that there is not a nonce in the unprotected headers
+	if parsed.Unprotected != nil {
+		if nonce := parsed.Unprotected.getNonce(); nonce != "" {
+			return nil, ErrUnprotectedNonce
+		}
+	}
+	if parsed.Header != nil {
+		if nonce := parsed.Header.getNonce(); nonce != "" {
+			return nil, ErrUnprotectedNonce
+		}
+	}
+
+	if parsed.Protected != nil && len(parsed.Protected.bytes()) > 0 {
+		err := json.Unmarshal(parsed.Protected.bytes(), &obj.protected)
+		if err != nil {
+			return nil, fmt.Errorf("go-jose/go-jose: invalid protected header: %s, %s", err, parsed.Protected.base64())
+		}
+	}
+
+	// Note: this must be called _after_ we parse the protected header,
+	// otherwise fields from the protected header will not get picked up.
+	var err error
+	mergedHeaders := obj.mergedHeaders(nil)
+	obj.Header, err = mergedHeaders.sanitized()
+	if err != nil {
+		return nil, fmt.Errorf("go-jose/go-jose: cannot sanitize merged headers: %v (%v)", err, mergedHeaders)
+	}
+
+	if len(parsed.Recipients) == 0 {
+		obj.recipients = []recipientInfo{
+			{
+				header:       parsed.Header,
+				encryptedKey: parsed.EncryptedKey.bytes(),
+			},
+		}
+	} else {
+		obj.recipients = make([]recipientInfo, len(parsed.Recipients))
+		for r := range parsed.Recipients {
+			encryptedKey, err := base64URLDecode(parsed.Recipients[r].EncryptedKey)
+			if err != nil {
+				return nil, err
+			}
+
+			// Check that there is not a nonce in the unprotected header
+			if parsed.Recipients[r].Header != nil && parsed.Recipients[r].Header.getNonce() != "" {
+				return nil, ErrUnprotectedNonce
+			}
+
+			obj.recipients[r].header = parsed.Recipients[r].Header
+			obj.recipients[r].encryptedKey = encryptedKey
+		}
+	}
+
+	for _, recipient := range obj.recipients {
+		headers := obj.mergedHeaders(&recipient)
+		if headers.getAlgorithm() == "" || headers.getEncryption() == "" {
+			return nil, fmt.Errorf("go-jose/go-jose: message is missing alg/enc headers")
+		}
+	}
+
+	obj.iv = parsed.Iv.bytes()
+	obj.ciphertext = parsed.Ciphertext.bytes()
+	obj.tag = parsed.Tag.bytes()
+	obj.aad = parsed.Aad.bytes()
+
+	return obj, nil
+}
+
+// parseEncryptedCompact parses a message in compact format.
+func parseEncryptedCompact(input string) (*JSONWebEncryption, error) {
+	parts := strings.Split(input, ".")
+	if len(parts) != 5 {
+		return nil, fmt.Errorf("go-jose/go-jose: compact JWE format must have five parts")
+	}
+
+	rawProtected, err := base64URLDecode(parts[0])
+	if err != nil {
+		return nil, err
+	}
+
+	encryptedKey, err := base64URLDecode(parts[1])
+	if err != nil {
+		return nil, err
+	}
+
+	iv, err := base64URLDecode(parts[2])
+	if err != nil {
+		return nil, err
+	}
+
+	ciphertext, err := base64URLDecode(parts[3])
+	if err != nil {
+		return nil, err
+	}
+
+	tag, err := base64URLDecode(parts[4])
+	if err != nil {
+		return nil, err
+	}
+
+	raw := &rawJSONWebEncryption{
+		Protected:    newBuffer(rawProtected),
+		EncryptedKey: newBuffer(encryptedKey),
+		Iv:           newBuffer(iv),
+		Ciphertext:   newBuffer(ciphertext),
+		Tag:          newBuffer(tag),
+	}
+
+	return raw.sanitized()
+}
+
+// CompactSerialize serializes an object using the compact serialization format.
+func (obj JSONWebEncryption) CompactSerialize() (string, error) {
+	if len(obj.recipients) != 1 || obj.unprotected != nil ||
+		obj.protected == nil || obj.recipients[0].header != nil {
+		return "", ErrNotSupported
+	}
+
+	serializedProtected := mustSerializeJSON(obj.protected)
+
+	return fmt.Sprintf(
+		"%s.%s.%s.%s.%s",
+		base64.RawURLEncoding.EncodeToString(serializedProtected),
+		base64.RawURLEncoding.EncodeToString(obj.recipients[0].encryptedKey),
+		base64.RawURLEncoding.EncodeToString(obj.iv),
+		base64.RawURLEncoding.EncodeToString(obj.ciphertext),
+		base64.RawURLEncoding.EncodeToString(obj.tag)), nil
+}
+
+// FullSerialize serializes an object using the full JSON serialization format.
+func (obj JSONWebEncryption) FullSerialize() string {
+	raw := rawJSONWebEncryption{
+		Unprotected:  obj.unprotected,
+		Iv:           newBuffer(obj.iv),
+		Ciphertext:   newBuffer(obj.ciphertext),
+		EncryptedKey: newBuffer(obj.recipients[0].encryptedKey),
+		Tag:          newBuffer(obj.tag),
+		Aad:          newBuffer(obj.aad),
+		Recipients:   []rawRecipientInfo{},
+	}
+
+	if len(obj.recipients) > 1 {
+		for _, recipient := range obj.recipients {
+			info := rawRecipientInfo{
+				Header:       recipient.header,
+				EncryptedKey: base64.RawURLEncoding.EncodeToString(recipient.encryptedKey),
+			}
+			raw.Recipients = append(raw.Recipients, info)
+		}
+	} else {
+		// Use flattened serialization
+		raw.Header = obj.recipients[0].header
+		raw.EncryptedKey = newBuffer(obj.recipients[0].encryptedKey)
+	}
+
+	if obj.protected != nil {
+		raw.Protected = newBuffer(mustSerializeJSON(obj.protected))
+	}
+
+	return string(mustSerializeJSON(raw))
+}
diff --git a/vendor/github.com/go-jose/go-jose/v3/jwk.go b/vendor/github.com/go-jose/go-jose/v3/jwk.go
new file mode 100644
index 0000000000..78ff5aca5b
--- /dev/null
+++ b/vendor/github.com/go-jose/go-jose/v3/jwk.go
@@ -0,0 +1,798 @@
+/*-
+ * Copyright 2014 Square Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package jose
+
+import (
+	"bytes"
+	"crypto"
+	"crypto/ecdsa"
+	"crypto/ed25519"
+	"crypto/elliptic"
+	"crypto/rsa"
+	"crypto/sha1"
+	"crypto/sha256"
+	"crypto/x509"
+	"encoding/base64"
+	"encoding/hex"
+	"errors"
+	"fmt"
+	"math/big"
+	"net/url"
+	"reflect"
+	"strings"
+
+	"github.com/go-jose/go-jose/v3/json"
+)
+
+// rawJSONWebKey represents a public or private key in JWK format, used for parsing/serializing.
+type rawJSONWebKey struct {
+	Use string      `json:"use,omitempty"`
+	Kty string      `json:"kty,omitempty"`
+	Kid string      `json:"kid,omitempty"`
+	Crv string      `json:"crv,omitempty"`
+	Alg string      `json:"alg,omitempty"`
+	K   *byteBuffer `json:"k,omitempty"`
+	X   *byteBuffer `json:"x,omitempty"`
+	Y   *byteBuffer `json:"y,omitempty"`
+	N   *byteBuffer `json:"n,omitempty"`
+	E   *byteBuffer `json:"e,omitempty"`
+	// -- Following fields are only used for private keys --
+	// RSA uses D, P and Q, while ECDSA uses only D. Fields Dp, Dq, and Qi are
+	// completely optional. Therefore for RSA/ECDSA, D != nil is a contract that
+	// we have a private key whereas D == nil means we have only a public key.
+	D  *byteBuffer `json:"d,omitempty"`
+	P  *byteBuffer `json:"p,omitempty"`
+	Q  *byteBuffer `json:"q,omitempty"`
+	Dp *byteBuffer `json:"dp,omitempty"`
+	Dq *byteBuffer `json:"dq,omitempty"`
+	Qi *byteBuffer `json:"qi,omitempty"`
+	// Certificates
+	X5c       []string `json:"x5c,omitempty"`
+	X5u       string   `json:"x5u,omitempty"`
+	X5tSHA1   string   `json:"x5t,omitempty"`
+	X5tSHA256 string   `json:"x5t#S256,omitempty"`
+}
+
+// JSONWebKey represents a public or private key in JWK format.
+type JSONWebKey struct {
+	// Cryptographic key, can be a symmetric or asymmetric key.
+	Key interface{}
+	// Key identifier, parsed from `kid` header.
+	KeyID string
+	// Key algorithm, parsed from `alg` header.
+	Algorithm string
+	// Key use, parsed from `use` header.
+	Use string
+
+	// X.509 certificate chain, parsed from `x5c` header.
+	Certificates []*x509.Certificate
+	// X.509 certificate URL, parsed from `x5u` header.
+	CertificatesURL *url.URL
+	// X.509 certificate thumbprint (SHA-1), parsed from `x5t` header.
+	CertificateThumbprintSHA1 []byte
+	// X.509 certificate thumbprint (SHA-256), parsed from `x5t#S256` header.
+	CertificateThumbprintSHA256 []byte
+}
+
+// MarshalJSON serializes the given key to its JSON representation.
+func (k JSONWebKey) MarshalJSON() ([]byte, error) {
+	var raw *rawJSONWebKey
+	var err error
+
+	switch key := k.Key.(type) {
+	case ed25519.PublicKey:
+		raw = fromEdPublicKey(key)
+	case *ecdsa.PublicKey:
+		raw, err = fromEcPublicKey(key)
+	case *rsa.PublicKey:
+		raw = fromRsaPublicKey(key)
+	case ed25519.PrivateKey:
+		raw, err = fromEdPrivateKey(key)
+	case *ecdsa.PrivateKey:
+		raw, err = fromEcPrivateKey(key)
+	case *rsa.PrivateKey:
+		raw, err = fromRsaPrivateKey(key)
+	case []byte:
+		raw, err = fromSymmetricKey(key)
+	default:
+		return nil, fmt.Errorf("go-jose/go-jose: unknown key type '%s'", reflect.TypeOf(key))
+	}
+
+	if err != nil {
+		return nil, err
+	}
+
+	raw.Kid = k.KeyID
+	raw.Alg = k.Algorithm
+	raw.Use = k.Use
+
+	for _, cert := range k.Certificates {
+		raw.X5c = append(raw.X5c, base64.StdEncoding.EncodeToString(cert.Raw))
+	}
+
+	x5tSHA1Len := len(k.CertificateThumbprintSHA1)
+	x5tSHA256Len := len(k.CertificateThumbprintSHA256)
+	if x5tSHA1Len > 0 {
+		if x5tSHA1Len != sha1.Size {
+			return nil, fmt.Errorf("go-jose/go-jose: invalid SHA-1 thumbprint (must be %d bytes, not %d)", sha1.Size, x5tSHA1Len)
+		}
+		raw.X5tSHA1 = base64.RawURLEncoding.EncodeToString(k.CertificateThumbprintSHA1)
+	}
+	if x5tSHA256Len > 0 {
+		if x5tSHA256Len != sha256.Size {
+			return nil, fmt.Errorf("go-jose/go-jose: invalid SHA-256 thumbprint (must be %d bytes, not %d)", sha256.Size, x5tSHA256Len)
+		}
+		raw.X5tSHA256 = base64.RawURLEncoding.EncodeToString(k.CertificateThumbprintSHA256)
+	}
+
+	// If cert chain is attached (as opposed to being behind a URL), check the
+	// keys thumbprints to make sure they match what is expected. This is to
+	// ensure we don't accidentally produce a JWK with semantically inconsistent
+	// data in the headers.
+	if len(k.Certificates) > 0 {
+		expectedSHA1 := sha1.Sum(k.Certificates[0].Raw)
+		expectedSHA256 := sha256.Sum256(k.Certificates[0].Raw)
+
+		if len(k.CertificateThumbprintSHA1) > 0 && !bytes.Equal(k.CertificateThumbprintSHA1, expectedSHA1[:]) {
+			return nil, errors.New("go-jose/go-jose: invalid SHA-1 thumbprint, does not match cert chain")
+		}
+		if len(k.CertificateThumbprintSHA256) > 0 && !bytes.Equal(k.CertificateThumbprintSHA256, expectedSHA256[:]) {
+			return nil, errors.New("go-jose/go-jose: invalid or SHA-256 thumbprint, does not match cert chain")
+		}
+	}
+
+	if k.CertificatesURL != nil {
+		raw.X5u = k.CertificatesURL.String()
+	}
+
+	return json.Marshal(raw)
+}
+
+// UnmarshalJSON reads a key from its JSON representation.
+func (k *JSONWebKey) UnmarshalJSON(data []byte) (err error) {
+	var raw rawJSONWebKey
+	err = json.Unmarshal(data, &raw)
+	if err != nil {
+		return err
+	}
+
+	certs, err := parseCertificateChain(raw.X5c)
+	if err != nil {
+		return fmt.Errorf("go-jose/go-jose: failed to unmarshal x5c field: %s", err)
+	}
+
+	var key interface{}
+	var certPub interface{}
+	var keyPub interface{}
+
+	if len(certs) > 0 {
+		// We need to check that leaf public key matches the key embedded in this
+		// JWK, as required by the standard (see RFC 7517, Section 4.7). Otherwise
+		// the JWK parsed could be semantically invalid. Technically, should also
+		// check key usage fields and other extensions on the cert here, but the
+		// standard doesn't exactly explain how they're supposed to map from the
+		// JWK representation to the X.509 extensions.
+		certPub = certs[0].PublicKey
+	}
+
+	switch raw.Kty {
+	case "EC":
+		if raw.D != nil {
+			key, err = raw.ecPrivateKey()
+			if err == nil {
+				keyPub = key.(*ecdsa.PrivateKey).Public()
+			}
+		} else {
+			key, err = raw.ecPublicKey()
+			keyPub = key
+		}
+	case "RSA":
+		if raw.D != nil {
+			key, err = raw.rsaPrivateKey()
+			if err == nil {
+				keyPub = key.(*rsa.PrivateKey).Public()
+			}
+		} else {
+			key, err = raw.rsaPublicKey()
+			keyPub = key
+		}
+	case "oct":
+		if certPub != nil {
+			return errors.New("go-jose/go-jose: invalid JWK, found 'oct' (symmetric) key with cert chain")
+		}
+		key, err = raw.symmetricKey()
+	case "OKP":
+		if raw.Crv == "Ed25519" && raw.X != nil {
+			if raw.D != nil {
+				key, err = raw.edPrivateKey()
+				if err == nil {
+					keyPub = key.(ed25519.PrivateKey).Public()
+				}
+			} else {
+				key, err = raw.edPublicKey()
+				keyPub = key
+			}
+		} else {
+			err = fmt.Errorf("go-jose/go-jose: unknown curve %s'", raw.Crv)
+		}
+	default:
+		err = fmt.Errorf("go-jose/go-jose: unknown json web key type '%s'", raw.Kty)
+	}
+
+	if err != nil {
+		return
+	}
+
+	if certPub != nil && keyPub != nil {
+		if !reflect.DeepEqual(certPub, keyPub) {
+			return errors.New("go-jose/go-jose: invalid JWK, public keys in key and x5c fields do not match")
+		}
+	}
+
+	*k = JSONWebKey{Key: key, KeyID: raw.Kid, Algorithm: raw.Alg, Use: raw.Use, Certificates: certs}
+
+	if raw.X5u != "" {
+		k.CertificatesURL, err = url.Parse(raw.X5u)
+		if err != nil {
+			return fmt.Errorf("go-jose/go-jose: invalid JWK, x5u header is invalid URL: %w", err)
+		}
+	}
+
+	// x5t parameters are base64url-encoded SHA thumbprints
+	// See RFC 7517, Section 4.8, https://tools.ietf.org/html/rfc7517#section-4.8
+	x5tSHA1bytes, err := base64URLDecode(raw.X5tSHA1)
+	if err != nil {
+		return errors.New("go-jose/go-jose: invalid JWK, x5t header has invalid encoding")
+	}
+
+	// RFC 7517, Section 4.8 is ambiguous as to whether the digest output should be byte or hex,
+	// for this reason, after base64 decoding, if the size is sha1.Size it's likely that the value is a byte encoded
+	// checksum so we skip this. Otherwise if the checksum was hex encoded we expect a 40 byte sized array so we'll
+	// try to hex decode it. When Marshalling this value we'll always use a base64 encoded version of byte format checksum.
+	if len(x5tSHA1bytes) == 2*sha1.Size {
+		hx, err := hex.DecodeString(string(x5tSHA1bytes))
+		if err != nil {
+			return fmt.Errorf("go-jose/go-jose: invalid JWK, unable to hex decode x5t: %v", err)
+
+		}
+		x5tSHA1bytes = hx
+	}
+
+	k.CertificateThumbprintSHA1 = x5tSHA1bytes
+
+	x5tSHA256bytes, err := base64URLDecode(raw.X5tSHA256)
+	if err != nil {
+		return errors.New("go-jose/go-jose: invalid JWK, x5t#S256 header has invalid encoding")
+	}
+
+	if len(x5tSHA256bytes) == 2*sha256.Size {
+		hx256, err := hex.DecodeString(string(x5tSHA256bytes))
+		if err != nil {
+			return fmt.Errorf("go-jose/go-jose: invalid JWK, unable to hex decode x5t#S256: %v", err)
+		}
+		x5tSHA256bytes = hx256
+	}
+
+	k.CertificateThumbprintSHA256 = x5tSHA256bytes
+
+	x5tSHA1Len := len(k.CertificateThumbprintSHA1)
+	x5tSHA256Len := len(k.CertificateThumbprintSHA256)
+	if x5tSHA1Len > 0 && x5tSHA1Len != sha1.Size {
+		return errors.New("go-jose/go-jose: invalid JWK, x5t header is of incorrect size")
+	}
+	if x5tSHA256Len > 0 && x5tSHA256Len != sha256.Size {
+		return errors.New("go-jose/go-jose: invalid JWK, x5t#S256 header is of incorrect size")
+	}
+
+	// If certificate chain *and* thumbprints are set, verify correctness.
+	if len(k.Certificates) > 0 {
+		leaf := k.Certificates[0]
+		sha1sum := sha1.Sum(leaf.Raw)
+		sha256sum := sha256.Sum256(leaf.Raw)
+
+		if len(k.CertificateThumbprintSHA1) > 0 && !bytes.Equal(sha1sum[:], k.CertificateThumbprintSHA1) {
+			return errors.New("go-jose/go-jose: invalid JWK, x5c thumbprint does not match x5t value")
+		}
+
+		if len(k.CertificateThumbprintSHA256) > 0 && !bytes.Equal(sha256sum[:], k.CertificateThumbprintSHA256) {
+			return errors.New("go-jose/go-jose: invalid JWK, x5c thumbprint does not match x5t#S256 value")
+		}
+	}
+
+	return
+}
+
+// JSONWebKeySet represents a JWK Set object.
+type JSONWebKeySet struct {
+	Keys []JSONWebKey `json:"keys"`
+}
+
+// Key convenience method returns keys by key ID. Specification states
+// that a JWK Set "SHOULD" use distinct key IDs, but allows for some
+// cases where they are not distinct. Hence method returns a slice
+// of JSONWebKeys.
+func (s *JSONWebKeySet) Key(kid string) []JSONWebKey {
+	var keys []JSONWebKey
+	for _, key := range s.Keys {
+		if key.KeyID == kid {
+			keys = append(keys, key)
+		}
+	}
+
+	return keys
+}
+
+const rsaThumbprintTemplate = `{"e":"%s","kty":"RSA","n":"%s"}`
+const ecThumbprintTemplate = `{"crv":"%s","kty":"EC","x":"%s","y":"%s"}`
+const edThumbprintTemplate = `{"crv":"%s","kty":"OKP","x":"%s"}`
+
+func ecThumbprintInput(curve elliptic.Curve, x, y *big.Int) (string, error) {
+	coordLength := curveSize(curve)
+	crv, err := curveName(curve)
+	if err != nil {
+		return "", err
+	}
+
+	if len(x.Bytes()) > coordLength || len(y.Bytes()) > coordLength {
+		return "", errors.New("go-jose/go-jose: invalid elliptic key (too large)")
+	}
+
+	return fmt.Sprintf(ecThumbprintTemplate, crv,
+		newFixedSizeBuffer(x.Bytes(), coordLength).base64(),
+		newFixedSizeBuffer(y.Bytes(), coordLength).base64()), nil
+}
+
+func rsaThumbprintInput(n *big.Int, e int) (string, error) {
+	return fmt.Sprintf(rsaThumbprintTemplate,
+		newBufferFromInt(uint64(e)).base64(),
+		newBuffer(n.Bytes()).base64()), nil
+}
+
+func edThumbprintInput(ed ed25519.PublicKey) (string, error) {
+	crv := "Ed25519"
+	if len(ed) > 32 {
+		return "", errors.New("go-jose/go-jose: invalid elliptic key (too large)")
+	}
+	return fmt.Sprintf(edThumbprintTemplate, crv,
+		newFixedSizeBuffer(ed, 32).base64()), nil
+}
+
+// Thumbprint computes the JWK Thumbprint of a key using the
+// indicated hash algorithm.
+func (k *JSONWebKey) Thumbprint(hash crypto.Hash) ([]byte, error) {
+	var input string
+	var err error
+	switch key := k.Key.(type) {
+	case ed25519.PublicKey:
+		input, err = edThumbprintInput(key)
+	case *ecdsa.PublicKey:
+		input, err = ecThumbprintInput(key.Curve, key.X, key.Y)
+	case *ecdsa.PrivateKey:
+		input, err = ecThumbprintInput(key.Curve, key.X, key.Y)
+	case *rsa.PublicKey:
+		input, err = rsaThumbprintInput(key.N, key.E)
+	case *rsa.PrivateKey:
+		input, err = rsaThumbprintInput(key.N, key.E)
+	case ed25519.PrivateKey:
+		input, err = edThumbprintInput(ed25519.PublicKey(key[32:]))
+	default:
+		return nil, fmt.Errorf("go-jose/go-jose: unknown key type '%s'", reflect.TypeOf(key))
+	}
+
+	if err != nil {
+		return nil, err
+	}
+
+	h := hash.New()
+	_, _ = h.Write([]byte(input))
+	return h.Sum(nil), nil
+}
+
+// IsPublic returns true if the JWK represents a public key (not symmetric, not private).
+func (k *JSONWebKey) IsPublic() bool {
+	switch k.Key.(type) {
+	case *ecdsa.PublicKey, *rsa.PublicKey, ed25519.PublicKey:
+		return true
+	default:
+		return false
+	}
+}
+
+// Public creates JSONWebKey with corresponding public key if JWK represents asymmetric private key.
+func (k *JSONWebKey) Public() JSONWebKey {
+	if k.IsPublic() {
+		return *k
+	}
+	ret := *k
+	switch key := k.Key.(type) {
+	case *ecdsa.PrivateKey:
+		ret.Key = key.Public()
+	case *rsa.PrivateKey:
+		ret.Key = key.Public()
+	case ed25519.PrivateKey:
+		ret.Key = key.Public()
+	default:
+		return JSONWebKey{} // returning invalid key
+	}
+	return ret
+}
+
+// Valid checks that the key contains the expected parameters.
+func (k *JSONWebKey) Valid() bool {
+	if k.Key == nil {
+		return false
+	}
+	switch key := k.Key.(type) {
+	case *ecdsa.PublicKey:
+		if key.Curve == nil || key.X == nil || key.Y == nil {
+			return false
+		}
+	case *ecdsa.PrivateKey:
+		if key.Curve == nil || key.X == nil || key.Y == nil || key.D == nil {
+			return false
+		}
+	case *rsa.PublicKey:
+		if key.N == nil || key.E == 0 {
+			return false
+		}
+	case *rsa.PrivateKey:
+		if key.N == nil || key.E == 0 || key.D == nil || len(key.Primes) < 2 {
+			return false
+		}
+	case ed25519.PublicKey:
+		if len(key) != 32 {
+			return false
+		}
+	case ed25519.PrivateKey:
+		if len(key) != 64 {
+			return false
+		}
+	default:
+		return false
+	}
+	return true
+}
+
+func (key rawJSONWebKey) rsaPublicKey() (*rsa.PublicKey, error) {
+	if key.N == nil || key.E == nil {
+		return nil, fmt.Errorf("go-jose/go-jose: invalid RSA key, missing n/e values")
+	}
+
+	return &rsa.PublicKey{
+		N: key.N.bigInt(),
+		E: key.E.toInt(),
+	}, nil
+}
+
+func fromEdPublicKey(pub ed25519.PublicKey) *rawJSONWebKey {
+	return &rawJSONWebKey{
+		Kty: "OKP",
+		Crv: "Ed25519",
+		X:   newBuffer(pub),
+	}
+}
+
+func fromRsaPublicKey(pub *rsa.PublicKey) *rawJSONWebKey {
+	return &rawJSONWebKey{
+		Kty: "RSA",
+		N:   newBuffer(pub.N.Bytes()),
+		E:   newBufferFromInt(uint64(pub.E)),
+	}
+}
+
+func (key rawJSONWebKey) ecPublicKey() (*ecdsa.PublicKey, error) {
+	var curve elliptic.Curve
+	switch key.Crv {
+	case "P-256":
+		curve = elliptic.P256()
+	case "P-384":
+		curve = elliptic.P384()
+	case "P-521":
+		curve = elliptic.P521()
+	default:
+		return nil, fmt.Errorf("go-jose/go-jose: unsupported elliptic curve '%s'", key.Crv)
+	}
+
+	if key.X == nil || key.Y == nil {
+		return nil, errors.New("go-jose/go-jose: invalid EC key, missing x/y values")
+	}
+
+	// The length of this octet string MUST be the full size of a coordinate for
+	// the curve specified in the "crv" parameter.
+	// https://tools.ietf.org/html/rfc7518#section-6.2.1.2
+	if curveSize(curve) != len(key.X.data) {
+		return nil, fmt.Errorf("go-jose/go-jose: invalid EC public key, wrong length for x")
+	}
+
+	if curveSize(curve) != len(key.Y.data) {
+		return nil, fmt.Errorf("go-jose/go-jose: invalid EC public key, wrong length for y")
+	}
+
+	x := key.X.bigInt()
+	y := key.Y.bigInt()
+
+	if !curve.IsOnCurve(x, y) {
+		return nil, errors.New("go-jose/go-jose: invalid EC key, X/Y are not on declared curve")
+	}
+
+	return &ecdsa.PublicKey{
+		Curve: curve,
+		X:     x,
+		Y:     y,
+	}, nil
+}
+
+func fromEcPublicKey(pub *ecdsa.PublicKey) (*rawJSONWebKey, error) {
+	if pub == nil || pub.X == nil || pub.Y == nil {
+		return nil, fmt.Errorf("go-jose/go-jose: invalid EC key (nil, or X/Y missing)")
+	}
+
+	name, err := curveName(pub.Curve)
+	if err != nil {
+		return nil, err
+	}
+
+	size := curveSize(pub.Curve)
+
+	xBytes := pub.X.Bytes()
+	yBytes := pub.Y.Bytes()
+
+	if len(xBytes) > size || len(yBytes) > size {
+		return nil, fmt.Errorf("go-jose/go-jose: invalid EC key (X/Y too large)")
+	}
+
+	key := &rawJSONWebKey{
+		Kty: "EC",
+		Crv: name,
+		X:   newFixedSizeBuffer(xBytes, size),
+		Y:   newFixedSizeBuffer(yBytes, size),
+	}
+
+	return key, nil
+}
+
+func (key rawJSONWebKey) edPrivateKey() (ed25519.PrivateKey, error) {
+	var missing []string
+	switch {
+	case key.D == nil:
+		missing = append(missing, "D")
+	case key.X == nil:
+		missing = append(missing, "X")
+	}
+
+	if len(missing) > 0 {
+		return nil, fmt.Errorf("go-jose/go-jose: invalid Ed25519 private key, missing %s value(s)", strings.Join(missing, ", "))
+	}
+
+	privateKey := make([]byte, ed25519.PrivateKeySize)
+	copy(privateKey[0:32], key.D.bytes())
+	copy(privateKey[32:], key.X.bytes())
+	rv := ed25519.PrivateKey(privateKey)
+	return rv, nil
+}
+
+func (key rawJSONWebKey) edPublicKey() (ed25519.PublicKey, error) {
+	if key.X == nil {
+		return nil, fmt.Errorf("go-jose/go-jose: invalid Ed key, missing x value")
+	}
+	publicKey := make([]byte, ed25519.PublicKeySize)
+	copy(publicKey[0:32], key.X.bytes())
+	rv := ed25519.PublicKey(publicKey)
+	return rv, nil
+}
+
+func (key rawJSONWebKey) rsaPrivateKey() (*rsa.PrivateKey, error) {
+	var missing []string
+	switch {
+	case key.N == nil:
+		missing = append(missing, "N")
+	case key.E == nil:
+		missing = append(missing, "E")
+	case key.D == nil:
+		missing = append(missing, "D")
+	case key.P == nil:
+		missing = append(missing, "P")
+	case key.Q == nil:
+		missing = append(missing, "Q")
+	}
+
+	if len(missing) > 0 {
+		return nil, fmt.Errorf("go-jose/go-jose: invalid RSA private key, missing %s value(s)", strings.Join(missing, ", "))
+	}
+
+	rv := &rsa.PrivateKey{
+		PublicKey: rsa.PublicKey{
+			N: key.N.bigInt(),
+			E: key.E.toInt(),
+		},
+		D: key.D.bigInt(),
+		Primes: []*big.Int{
+			key.P.bigInt(),
+			key.Q.bigInt(),
+		},
+	}
+
+	if key.Dp != nil {
+		rv.Precomputed.Dp = key.Dp.bigInt()
+	}
+	if key.Dq != nil {
+		rv.Precomputed.Dq = key.Dq.bigInt()
+	}
+	if key.Qi != nil {
+		rv.Precomputed.Qinv = key.Qi.bigInt()
+	}
+
+	err := rv.Validate()
+	return rv, err
+}
+
+func fromEdPrivateKey(ed ed25519.PrivateKey) (*rawJSONWebKey, error) {
+	raw := fromEdPublicKey(ed25519.PublicKey(ed[32:]))
+
+	raw.D = newBuffer(ed[0:32])
+	return raw, nil
+}
+
+func fromRsaPrivateKey(rsa *rsa.PrivateKey) (*rawJSONWebKey, error) {
+	if len(rsa.Primes) != 2 {
+		return nil, ErrUnsupportedKeyType
+	}
+
+	raw := fromRsaPublicKey(&rsa.PublicKey)
+
+	raw.D = newBuffer(rsa.D.Bytes())
+	raw.P = newBuffer(rsa.Primes[0].Bytes())
+	raw.Q = newBuffer(rsa.Primes[1].Bytes())
+
+	if rsa.Precomputed.Dp != nil {
+		raw.Dp = newBuffer(rsa.Precomputed.Dp.Bytes())
+	}
+	if rsa.Precomputed.Dq != nil {
+		raw.Dq = newBuffer(rsa.Precomputed.Dq.Bytes())
+	}
+	if rsa.Precomputed.Qinv != nil {
+		raw.Qi = newBuffer(rsa.Precomputed.Qinv.Bytes())
+	}
+
+	return raw, nil
+}
+
+func (key rawJSONWebKey) ecPrivateKey() (*ecdsa.PrivateKey, error) {
+	var curve elliptic.Curve
+	switch key.Crv {
+	case "P-256":
+		curve = elliptic.P256()
+	case "P-384":
+		curve = elliptic.P384()
+	case "P-521":
+		curve = elliptic.P521()
+	default:
+		return nil, fmt.Errorf("go-jose/go-jose: unsupported elliptic curve '%s'", key.Crv)
+	}
+
+	if key.X == nil || key.Y == nil || key.D == nil {
+		return nil, fmt.Errorf("go-jose/go-jose: invalid EC private key, missing x/y/d values")
+	}
+
+	// The length of this octet string MUST be the full size of a coordinate for
+	// the curve specified in the "crv" parameter.
+	// https://tools.ietf.org/html/rfc7518#section-6.2.1.2
+	if curveSize(curve) != len(key.X.data) {
+		return nil, fmt.Errorf("go-jose/go-jose: invalid EC private key, wrong length for x")
+	}
+
+	if curveSize(curve) != len(key.Y.data) {
+		return nil, fmt.Errorf("go-jose/go-jose: invalid EC private key, wrong length for y")
+	}
+
+	// https://tools.ietf.org/html/rfc7518#section-6.2.2.1
+	if dSize(curve) != len(key.D.data) {
+		return nil, fmt.Errorf("go-jose/go-jose: invalid EC private key, wrong length for d")
+	}
+
+	x := key.X.bigInt()
+	y := key.Y.bigInt()
+
+	if !curve.IsOnCurve(x, y) {
+		return nil, errors.New("go-jose/go-jose: invalid EC key, X/Y are not on declared curve")
+	}
+
+	return &ecdsa.PrivateKey{
+		PublicKey: ecdsa.PublicKey{
+			Curve: curve,
+			X:     x,
+			Y:     y,
+		},
+		D: key.D.bigInt(),
+	}, nil
+}
+
+func fromEcPrivateKey(ec *ecdsa.PrivateKey) (*rawJSONWebKey, error) {
+	raw, err := fromEcPublicKey(&ec.PublicKey)
+	if err != nil {
+		return nil, err
+	}
+
+	if ec.D == nil {
+		return nil, fmt.Errorf("go-jose/go-jose: invalid EC private key")
+	}
+
+	raw.D = newFixedSizeBuffer(ec.D.Bytes(), dSize(ec.PublicKey.Curve))
+
+	return raw, nil
+}
+
+// dSize returns the size in octets for the "d" member of an elliptic curve
+// private key.
+// The length of this octet string MUST be ceiling(log-base-2(n)/8)
+// octets (where n is the order of the curve).
+// https://tools.ietf.org/html/rfc7518#section-6.2.2.1
+func dSize(curve elliptic.Curve) int {
+	order := curve.Params().P
+	bitLen := order.BitLen()
+	size := bitLen / 8
+	if bitLen%8 != 0 {
+		size++
+	}
+	return size
+}
+
+func fromSymmetricKey(key []byte) (*rawJSONWebKey, error) {
+	return &rawJSONWebKey{
+		Kty: "oct",
+		K:   newBuffer(key),
+	}, nil
+}
+
+func (key rawJSONWebKey) symmetricKey() ([]byte, error) {
+	if key.K == nil {
+		return nil, fmt.Errorf("go-jose/go-jose: invalid OCT (symmetric) key, missing k value")
+	}
+	return key.K.bytes(), nil
+}
+
+func tryJWKS(key interface{}, headers ...Header) interface{} {
+	var jwks JSONWebKeySet
+
+	switch jwksType := key.(type) {
+	case *JSONWebKeySet:
+		jwks = *jwksType
+	case JSONWebKeySet:
+		jwks = jwksType
+	default:
+		return key
+	}
+
+	var kid string
+	for _, header := range headers {
+		if header.KeyID != "" {
+			kid = header.KeyID
+			break
+		}
+	}
+
+	if kid == "" {
+		return key
+	}
+
+	keys := jwks.Key(kid)
+	if len(keys) == 0 {
+		return key
+	}
+
+	return keys[0].Key
+}
diff --git a/vendor/github.com/go-jose/go-jose/v3/jws.go b/vendor/github.com/go-jose/go-jose/v3/jws.go
new file mode 100644
index 0000000000..865f16ad33
--- /dev/null
+++ b/vendor/github.com/go-jose/go-jose/v3/jws.go
@@ -0,0 +1,366 @@
+/*-
+ * Copyright 2014 Square Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package jose
+
+import (
+	"bytes"
+	"encoding/base64"
+	"errors"
+	"fmt"
+	"strings"
+
+	"github.com/go-jose/go-jose/v3/json"
+)
+
+// rawJSONWebSignature represents a raw JWS JSON object. Used for parsing/serializing.
+type rawJSONWebSignature struct {
+	Payload    *byteBuffer        `json:"payload,omitempty"`
+	Signatures []rawSignatureInfo `json:"signatures,omitempty"`
+	Protected  *byteBuffer        `json:"protected,omitempty"`
+	Header     *rawHeader         `json:"header,omitempty"`
+	Signature  *byteBuffer        `json:"signature,omitempty"`
+}
+
+// rawSignatureInfo represents a single JWS signature over the JWS payload and protected header.
+type rawSignatureInfo struct {
+	Protected *byteBuffer `json:"protected,omitempty"`
+	Header    *rawHeader  `json:"header,omitempty"`
+	Signature *byteBuffer `json:"signature,omitempty"`
+}
+
+// JSONWebSignature represents a signed JWS object after parsing.
+type JSONWebSignature struct {
+	payload []byte
+	// Signatures attached to this object (may be more than one for multi-sig).
+	// Be careful about accessing these directly, prefer to use Verify() or
+	// VerifyMulti() to ensure that the data you're getting is verified.
+	Signatures []Signature
+}
+
+// Signature represents a single signature over the JWS payload and protected header.
+type Signature struct {
+	// Merged header fields. Contains both protected and unprotected header
+	// values. Prefer using Protected and Unprotected fields instead of this.
+	// Values in this header may or may not have been signed and in general
+	// should not be trusted.
+	Header Header
+
+	// Protected header. Values in this header were signed and
+	// will be verified as part of the signature verification process.
+	Protected Header
+
+	// Unprotected header. Values in this header were not signed
+	// and in general should not be trusted.
+	Unprotected Header
+
+	// The actual signature value
+	Signature []byte
+
+	protected *rawHeader
+	header    *rawHeader
+	original  *rawSignatureInfo
+}
+
+// ParseSigned parses a signed message in compact or JWS JSON Serialization format.
+func ParseSigned(signature string) (*JSONWebSignature, error) {
+	signature = stripWhitespace(signature)
+	if strings.HasPrefix(signature, "{") {
+		return parseSignedFull(signature)
+	}
+
+	return parseSignedCompact(signature, nil)
+}
+
+// ParseDetached parses a signed message in compact serialization format with detached payload.
+func ParseDetached(signature string, payload []byte) (*JSONWebSignature, error) {
+	if payload == nil {
+		return nil, errors.New("go-jose/go-jose: nil payload")
+	}
+	return parseSignedCompact(stripWhitespace(signature), payload)
+}
+
+// Get a header value
+func (sig Signature) mergedHeaders() rawHeader {
+	out := rawHeader{}
+	out.merge(sig.protected)
+	out.merge(sig.header)
+	return out
+}
+
+// Compute data to be signed
+func (obj JSONWebSignature) computeAuthData(payload []byte, signature *Signature) ([]byte, error) {
+	var authData bytes.Buffer
+
+	protectedHeader := new(rawHeader)
+
+	if signature.original != nil && signature.original.Protected != nil {
+		if err := json.Unmarshal(signature.original.Protected.bytes(), protectedHeader); err != nil {
+			return nil, err
+		}
+		authData.WriteString(signature.original.Protected.base64())
+	} else if signature.protected != nil {
+		protectedHeader = signature.protected
+		authData.WriteString(base64.RawURLEncoding.EncodeToString(mustSerializeJSON(protectedHeader)))
+	}
+
+	needsBase64 := true
+
+	if protectedHeader != nil {
+		var err error
+		if needsBase64, err = protectedHeader.getB64(); err != nil {
+			needsBase64 = true
+		}
+	}
+
+	authData.WriteByte('.')
+
+	if needsBase64 {
+		authData.WriteString(base64.RawURLEncoding.EncodeToString(payload))
+	} else {
+		authData.Write(payload)
+	}
+
+	return authData.Bytes(), nil
+}
+
+// parseSignedFull parses a message in full format.
+func parseSignedFull(input string) (*JSONWebSignature, error) {
+	var parsed rawJSONWebSignature
+	err := json.Unmarshal([]byte(input), &parsed)
+	if err != nil {
+		return nil, err
+	}
+
+	return parsed.sanitized()
+}
+
+// sanitized produces a cleaned-up JWS object from the raw JSON.
+func (parsed *rawJSONWebSignature) sanitized() (*JSONWebSignature, error) {
+	if parsed.Payload == nil {
+		return nil, fmt.Errorf("go-jose/go-jose: missing payload in JWS message")
+	}
+
+	obj := &JSONWebSignature{
+		payload:    parsed.Payload.bytes(),
+		Signatures: make([]Signature, len(parsed.Signatures)),
+	}
+
+	if len(parsed.Signatures) == 0 {
+		// No signatures array, must be flattened serialization
+		signature := Signature{}
+		if parsed.Protected != nil && len(parsed.Protected.bytes()) > 0 {
+			signature.protected = &rawHeader{}
+			err := json.Unmarshal(parsed.Protected.bytes(), signature.protected)
+			if err != nil {
+				return nil, err
+			}
+		}
+
+		// Check that there is not a nonce in the unprotected header
+		if parsed.Header != nil && parsed.Header.getNonce() != "" {
+			return nil, ErrUnprotectedNonce
+		}
+
+		signature.header = parsed.Header
+		signature.Signature = parsed.Signature.bytes()
+		// Make a fake "original" rawSignatureInfo to store the unprocessed
+		// Protected header. This is necessary because the Protected header can
+		// contain arbitrary fields not registered as part of the spec. See
+		// https://tools.ietf.org/html/draft-ietf-jose-json-web-signature-41#section-4
+		// If we unmarshal Protected into a rawHeader with its explicit list of fields,
+		// we cannot marshal losslessly. So we have to keep around the original bytes.
+		// This is used in computeAuthData, which will first attempt to use
+		// the original bytes of a protected header, and fall back on marshaling the
+		// header struct only if those bytes are not available.
+		signature.original = &rawSignatureInfo{
+			Protected: parsed.Protected,
+			Header:    parsed.Header,
+			Signature: parsed.Signature,
+		}
+
+		var err error
+		signature.Header, err = signature.mergedHeaders().sanitized()
+		if err != nil {
+			return nil, err
+		}
+
+		if signature.header != nil {
+			signature.Unprotected, err = signature.header.sanitized()
+			if err != nil {
+				return nil, err
+			}
+		}
+
+		if signature.protected != nil {
+			signature.Protected, err = signature.protected.sanitized()
+			if err != nil {
+				return nil, err
+			}
+		}
+
+		// As per RFC 7515 Section 4.1.3, only public keys are allowed to be embedded.
+		jwk := signature.Header.JSONWebKey
+		if jwk != nil && (!jwk.Valid() || !jwk.IsPublic()) {
+			return nil, errors.New("go-jose/go-jose: invalid embedded jwk, must be public key")
+		}
+
+		obj.Signatures = append(obj.Signatures, signature)
+	}
+
+	for i, sig := range parsed.Signatures {
+		if sig.Protected != nil && len(sig.Protected.bytes()) > 0 {
+			obj.Signatures[i].protected = &rawHeader{}
+			err := json.Unmarshal(sig.Protected.bytes(), obj.Signatures[i].protected)
+			if err != nil {
+				return nil, err
+			}
+		}
+
+		// Check that there is not a nonce in the unprotected header
+		if sig.Header != nil && sig.Header.getNonce() != "" {
+			return nil, ErrUnprotectedNonce
+		}
+
+		var err error
+		obj.Signatures[i].Header, err = obj.Signatures[i].mergedHeaders().sanitized()
+		if err != nil {
+			return nil, err
+		}
+
+		if obj.Signatures[i].header != nil {
+			obj.Signatures[i].Unprotected, err = obj.Signatures[i].header.sanitized()
+			if err != nil {
+				return nil, err
+			}
+		}
+
+		if obj.Signatures[i].protected != nil {
+			obj.Signatures[i].Protected, err = obj.Signatures[i].protected.sanitized()
+			if err != nil {
+				return nil, err
+			}
+		}
+
+		obj.Signatures[i].Signature = sig.Signature.bytes()
+
+		// As per RFC 7515 Section 4.1.3, only public keys are allowed to be embedded.
+		jwk := obj.Signatures[i].Header.JSONWebKey
+		if jwk != nil && (!jwk.Valid() || !jwk.IsPublic()) {
+			return nil, errors.New("go-jose/go-jose: invalid embedded jwk, must be public key")
+		}
+
+		// Copy value of sig
+		original := sig
+
+		obj.Signatures[i].header = sig.Header
+		obj.Signatures[i].original = &original
+	}
+
+	return obj, nil
+}
+
+// parseSignedCompact parses a message in compact format.
+func parseSignedCompact(input string, payload []byte) (*JSONWebSignature, error) {
+	parts := strings.Split(input, ".")
+	if len(parts) != 3 {
+		return nil, fmt.Errorf("go-jose/go-jose: compact JWS format must have three parts")
+	}
+
+	if parts[1] != "" && payload != nil {
+		return nil, fmt.Errorf("go-jose/go-jose: payload is not detached")
+	}
+
+	rawProtected, err := base64URLDecode(parts[0])
+	if err != nil {
+		return nil, err
+	}
+
+	if payload == nil {
+		payload, err = base64URLDecode(parts[1])
+		if err != nil {
+			return nil, err
+		}
+	}
+
+	signature, err := base64URLDecode(parts[2])
+	if err != nil {
+		return nil, err
+	}
+
+	raw := &rawJSONWebSignature{
+		Payload:   newBuffer(payload),
+		Protected: newBuffer(rawProtected),
+		Signature: newBuffer(signature),
+	}
+	return raw.sanitized()
+}
+
+func (obj JSONWebSignature) compactSerialize(detached bool) (string, error) {
+	if len(obj.Signatures) != 1 || obj.Signatures[0].header != nil || obj.Signatures[0].protected == nil {
+		return "", ErrNotSupported
+	}
+
+	serializedProtected := base64.RawURLEncoding.EncodeToString(mustSerializeJSON(obj.Signatures[0].protected))
+	payload := ""
+	signature := base64.RawURLEncoding.EncodeToString(obj.Signatures[0].Signature)
+
+	if !detached {
+		payload = base64.RawURLEncoding.EncodeToString(obj.payload)
+	}
+
+	return fmt.Sprintf("%s.%s.%s", serializedProtected, payload, signature), nil
+}
+
+// CompactSerialize serializes an object using the compact serialization format.
+func (obj JSONWebSignature) CompactSerialize() (string, error) {
+	return obj.compactSerialize(false)
+}
+
+// DetachedCompactSerialize serializes an object using the compact serialization format with detached payload.
+func (obj JSONWebSignature) DetachedCompactSerialize() (string, error) {
+	return obj.compactSerialize(true)
+}
+
+// FullSerialize serializes an object using the full JSON serialization format.
+func (obj JSONWebSignature) FullSerialize() string {
+	raw := rawJSONWebSignature{
+		Payload: newBuffer(obj.payload),
+	}
+
+	if len(obj.Signatures) == 1 {
+		if obj.Signatures[0].protected != nil {
+			serializedProtected := mustSerializeJSON(obj.Signatures[0].protected)
+			raw.Protected = newBuffer(serializedProtected)
+		}
+		raw.Header = obj.Signatures[0].header
+		raw.Signature = newBuffer(obj.Signatures[0].Signature)
+	} else {
+		raw.Signatures = make([]rawSignatureInfo, len(obj.Signatures))
+		for i, signature := range obj.Signatures {
+			raw.Signatures[i] = rawSignatureInfo{
+				Header:    signature.header,
+				Signature: newBuffer(signature.Signature),
+			}
+
+			if signature.protected != nil {
+				raw.Signatures[i].Protected = newBuffer(mustSerializeJSON(signature.protected))
+			}
+		}
+	}
+
+	return string(mustSerializeJSON(raw))
+}
diff --git a/vendor/github.com/go-jose/go-jose/v3/opaque.go b/vendor/github.com/go-jose/go-jose/v3/opaque.go
new file mode 100644
index 0000000000..fc3e8d2ef6
--- /dev/null
+++ b/vendor/github.com/go-jose/go-jose/v3/opaque.go
@@ -0,0 +1,144 @@
+/*-
+ * Copyright 2018 Square Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package jose
+
+// OpaqueSigner is an interface that supports signing payloads with opaque
+// private key(s). Private key operations performed by implementers may, for
+// example, occur in a hardware module. An OpaqueSigner may rotate signing keys
+// transparently to the user of this interface.
+type OpaqueSigner interface {
+	// Public returns the public key of the current signing key.
+	Public() *JSONWebKey
+	// Algs returns a list of supported signing algorithms.
+	Algs() []SignatureAlgorithm
+	// SignPayload signs a payload with the current signing key using the given
+	// algorithm.
+	SignPayload(payload []byte, alg SignatureAlgorithm) ([]byte, error)
+}
+
+type opaqueSigner struct {
+	signer OpaqueSigner
+}
+
+func newOpaqueSigner(alg SignatureAlgorithm, signer OpaqueSigner) (recipientSigInfo, error) {
+	var algSupported bool
+	for _, salg := range signer.Algs() {
+		if alg == salg {
+			algSupported = true
+			break
+		}
+	}
+	if !algSupported {
+		return recipientSigInfo{}, ErrUnsupportedAlgorithm
+	}
+
+	return recipientSigInfo{
+		sigAlg:    alg,
+		publicKey: signer.Public,
+		signer: &opaqueSigner{
+			signer: signer,
+		},
+	}, nil
+}
+
+func (o *opaqueSigner) signPayload(payload []byte, alg SignatureAlgorithm) (Signature, error) {
+	out, err := o.signer.SignPayload(payload, alg)
+	if err != nil {
+		return Signature{}, err
+	}
+
+	return Signature{
+		Signature: out,
+		protected: &rawHeader{},
+	}, nil
+}
+
+// OpaqueVerifier is an interface that supports verifying payloads with opaque
+// public key(s). An OpaqueSigner may rotate signing keys transparently to the
+// user of this interface.
+type OpaqueVerifier interface {
+	VerifyPayload(payload []byte, signature []byte, alg SignatureAlgorithm) error
+}
+
+type opaqueVerifier struct {
+	verifier OpaqueVerifier
+}
+
+func (o *opaqueVerifier) verifyPayload(payload []byte, signature []byte, alg SignatureAlgorithm) error {
+	return o.verifier.VerifyPayload(payload, signature, alg)
+}
+
+// OpaqueKeyEncrypter is an interface that supports encrypting keys with an opaque key.
+type OpaqueKeyEncrypter interface {
+	// KeyID returns the kid
+	KeyID() string
+	// Algs returns a list of supported key encryption algorithms.
+	Algs() []KeyAlgorithm
+	// encryptKey encrypts the CEK using the given algorithm.
+	encryptKey(cek []byte, alg KeyAlgorithm) (recipientInfo, error)
+}
+
+type opaqueKeyEncrypter struct {
+	encrypter OpaqueKeyEncrypter
+}
+
+func newOpaqueKeyEncrypter(alg KeyAlgorithm, encrypter OpaqueKeyEncrypter) (recipientKeyInfo, error) {
+	var algSupported bool
+	for _, salg := range encrypter.Algs() {
+		if alg == salg {
+			algSupported = true
+			break
+		}
+	}
+	if !algSupported {
+		return recipientKeyInfo{}, ErrUnsupportedAlgorithm
+	}
+
+	return recipientKeyInfo{
+		keyID:  encrypter.KeyID(),
+		keyAlg: alg,
+		keyEncrypter: &opaqueKeyEncrypter{
+			encrypter: encrypter,
+		},
+	}, nil
+}
+
+func (oke *opaqueKeyEncrypter) encryptKey(cek []byte, alg KeyAlgorithm) (recipientInfo, error) {
+	return oke.encrypter.encryptKey(cek, alg)
+}
+
+//OpaqueKeyDecrypter is an interface that supports decrypting keys with an opaque key.
+type OpaqueKeyDecrypter interface {
+	DecryptKey(encryptedKey []byte, header Header) ([]byte, error)
+}
+
+type opaqueKeyDecrypter struct {
+	decrypter OpaqueKeyDecrypter
+}
+
+func (okd *opaqueKeyDecrypter) decryptKey(headers rawHeader, recipient *recipientInfo, generator keyGenerator) ([]byte, error) {
+	mergedHeaders := rawHeader{}
+	mergedHeaders.merge(&headers)
+	mergedHeaders.merge(recipient.header)
+
+	header, err := mergedHeaders.sanitized()
+	if err != nil {
+		return nil, err
+	}
+
+	return okd.decrypter.DecryptKey(recipient.encryptedKey, header)
+}
diff --git a/vendor/github.com/go-jose/go-jose/v3/shared.go b/vendor/github.com/go-jose/go-jose/v3/shared.go
new file mode 100644
index 0000000000..fc2505e0eb
--- /dev/null
+++ b/vendor/github.com/go-jose/go-jose/v3/shared.go
@@ -0,0 +1,520 @@
+/*-
+ * Copyright 2014 Square Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package jose
+
+import (
+	"crypto/elliptic"
+	"crypto/x509"
+	"encoding/base64"
+	"errors"
+	"fmt"
+
+	"github.com/go-jose/go-jose/v3/json"
+)
+
+// KeyAlgorithm represents a key management algorithm.
+type KeyAlgorithm string
+
+// SignatureAlgorithm represents a signature (or MAC) algorithm.
+type SignatureAlgorithm string
+
+// ContentEncryption represents a content encryption algorithm.
+type ContentEncryption string
+
+// CompressionAlgorithm represents an algorithm used for plaintext compression.
+type CompressionAlgorithm string
+
+// ContentType represents type of the contained data.
+type ContentType string
+
+var (
+	// ErrCryptoFailure represents an error in cryptographic primitive. This
+	// occurs when, for example, a message had an invalid authentication tag or
+	// could not be decrypted.
+	ErrCryptoFailure = errors.New("go-jose/go-jose: error in cryptographic primitive")
+
+	// ErrUnsupportedAlgorithm indicates that a selected algorithm is not
+	// supported. This occurs when trying to instantiate an encrypter for an
+	// algorithm that is not yet implemented.
+	ErrUnsupportedAlgorithm = errors.New("go-jose/go-jose: unknown/unsupported algorithm")
+
+	// ErrUnsupportedKeyType indicates that the given key type/format is not
+	// supported. This occurs when trying to instantiate an encrypter and passing
+	// it a key of an unrecognized type or with unsupported parameters, such as
+	// an RSA private key with more than two primes.
+	ErrUnsupportedKeyType = errors.New("go-jose/go-jose: unsupported key type/format")
+
+	// ErrInvalidKeySize indicates that the given key is not the correct size
+	// for the selected algorithm. This can occur, for example, when trying to
+	// encrypt with AES-256 but passing only a 128-bit key as input.
+	ErrInvalidKeySize = errors.New("go-jose/go-jose: invalid key size for algorithm")
+
+	// ErrNotSupported serialization of object is not supported. This occurs when
+	// trying to compact-serialize an object which can't be represented in
+	// compact form.
+	ErrNotSupported = errors.New("go-jose/go-jose: compact serialization not supported for object")
+
+	// ErrUnprotectedNonce indicates that while parsing a JWS or JWE object, a
+	// nonce header parameter was included in an unprotected header object.
+	ErrUnprotectedNonce = errors.New("go-jose/go-jose: Nonce parameter included in unprotected header")
+)
+
+// Key management algorithms
+const (
+	ED25519            = KeyAlgorithm("ED25519")
+	RSA1_5             = KeyAlgorithm("RSA1_5")             // RSA-PKCS1v1.5
+	RSA_OAEP           = KeyAlgorithm("RSA-OAEP")           // RSA-OAEP-SHA1
+	RSA_OAEP_256       = KeyAlgorithm("RSA-OAEP-256")       // RSA-OAEP-SHA256
+	A128KW             = KeyAlgorithm("A128KW")             // AES key wrap (128)
+	A192KW             = KeyAlgorithm("A192KW")             // AES key wrap (192)
+	A256KW             = KeyAlgorithm("A256KW")             // AES key wrap (256)
+	DIRECT             = KeyAlgorithm("dir")                // Direct encryption
+	ECDH_ES            = KeyAlgorithm("ECDH-ES")            // ECDH-ES
+	ECDH_ES_A128KW     = KeyAlgorithm("ECDH-ES+A128KW")     // ECDH-ES + AES key wrap (128)
+	ECDH_ES_A192KW     = KeyAlgorithm("ECDH-ES+A192KW")     // ECDH-ES + AES key wrap (192)
+	ECDH_ES_A256KW     = KeyAlgorithm("ECDH-ES+A256KW")     // ECDH-ES + AES key wrap (256)
+	A128GCMKW          = KeyAlgorithm("A128GCMKW")          // AES-GCM key wrap (128)
+	A192GCMKW          = KeyAlgorithm("A192GCMKW")          // AES-GCM key wrap (192)
+	A256GCMKW          = KeyAlgorithm("A256GCMKW")          // AES-GCM key wrap (256)
+	PBES2_HS256_A128KW = KeyAlgorithm("PBES2-HS256+A128KW") // PBES2 + HMAC-SHA256 + AES key wrap (128)
+	PBES2_HS384_A192KW = KeyAlgorithm("PBES2-HS384+A192KW") // PBES2 + HMAC-SHA384 + AES key wrap (192)
+	PBES2_HS512_A256KW = KeyAlgorithm("PBES2-HS512+A256KW") // PBES2 + HMAC-SHA512 + AES key wrap (256)
+)
+
+// Signature algorithms
+const (
+	EdDSA = SignatureAlgorithm("EdDSA")
+	HS256 = SignatureAlgorithm("HS256") // HMAC using SHA-256
+	HS384 = SignatureAlgorithm("HS384") // HMAC using SHA-384
+	HS512 = SignatureAlgorithm("HS512") // HMAC using SHA-512
+	RS256 = SignatureAlgorithm("RS256") // RSASSA-PKCS-v1.5 using SHA-256
+	RS384 = SignatureAlgorithm("RS384") // RSASSA-PKCS-v1.5 using SHA-384
+	RS512 = SignatureAlgorithm("RS512") // RSASSA-PKCS-v1.5 using SHA-512
+	ES256 = SignatureAlgorithm("ES256") // ECDSA using P-256 and SHA-256
+	ES384 = SignatureAlgorithm("ES384") // ECDSA using P-384 and SHA-384
+	ES512 = SignatureAlgorithm("ES512") // ECDSA using P-521 and SHA-512
+	PS256 = SignatureAlgorithm("PS256") // RSASSA-PSS using SHA256 and MGF1-SHA256
+	PS384 = SignatureAlgorithm("PS384") // RSASSA-PSS using SHA384 and MGF1-SHA384
+	PS512 = SignatureAlgorithm("PS512") // RSASSA-PSS using SHA512 and MGF1-SHA512
+)
+
+// Content encryption algorithms
+const (
+	A128CBC_HS256 = ContentEncryption("A128CBC-HS256") // AES-CBC + HMAC-SHA256 (128)
+	A192CBC_HS384 = ContentEncryption("A192CBC-HS384") // AES-CBC + HMAC-SHA384 (192)
+	A256CBC_HS512 = ContentEncryption("A256CBC-HS512") // AES-CBC + HMAC-SHA512 (256)
+	A128GCM       = ContentEncryption("A128GCM")       // AES-GCM (128)
+	A192GCM       = ContentEncryption("A192GCM")       // AES-GCM (192)
+	A256GCM       = ContentEncryption("A256GCM")       // AES-GCM (256)
+)
+
+// Compression algorithms
+const (
+	NONE    = CompressionAlgorithm("")    // No compression
+	DEFLATE = CompressionAlgorithm("DEF") // DEFLATE (RFC 1951)
+)
+
+// A key in the protected header of a JWS object. Use of the Header...
+// constants is preferred to enhance type safety.
+type HeaderKey string
+
+const (
+	HeaderType        = "typ" // string
+	HeaderContentType = "cty" // string
+
+	// These are set by go-jose and shouldn't need to be set by consumers of the
+	// library.
+	headerAlgorithm   = "alg"  // string
+	headerEncryption  = "enc"  // ContentEncryption
+	headerCompression = "zip"  // CompressionAlgorithm
+	headerCritical    = "crit" // []string
+
+	headerAPU = "apu" // *byteBuffer
+	headerAPV = "apv" // *byteBuffer
+	headerEPK = "epk" // *JSONWebKey
+	headerIV  = "iv"  // *byteBuffer
+	headerTag = "tag" // *byteBuffer
+	headerX5c = "x5c" // []*x509.Certificate
+
+	headerJWK   = "jwk"   // *JSONWebKey
+	headerKeyID = "kid"   // string
+	headerNonce = "nonce" // string
+	headerB64   = "b64"   // bool
+
+	headerP2C = "p2c" // *byteBuffer (int)
+	headerP2S = "p2s" // *byteBuffer ([]byte)
+
+)
+
+// supportedCritical is the set of supported extensions that are understood and processed.
+var supportedCritical = map[string]bool{
+	headerB64: true,
+}
+
+// rawHeader represents the JOSE header for JWE/JWS objects (used for parsing).
+//
+// The decoding of the constituent items is deferred because we want to marshal
+// some members into particular structs rather than generic maps, but at the
+// same time we need to receive any extra fields unhandled by this library to
+// pass through to consuming code in case it wants to examine them.
+type rawHeader map[HeaderKey]*json.RawMessage
+
+// Header represents the read-only JOSE header for JWE/JWS objects.
+type Header struct {
+	KeyID      string
+	JSONWebKey *JSONWebKey
+	Algorithm  string
+	Nonce      string
+
+	// Unverified certificate chain parsed from x5c header.
+	certificates []*x509.Certificate
+
+	// Any headers not recognised above get unmarshalled
+	// from JSON in a generic manner and placed in this map.
+	ExtraHeaders map[HeaderKey]interface{}
+}
+
+// Certificates verifies & returns the certificate chain present
+// in the x5c header field of a message, if one was present. Returns
+// an error if there was no x5c header present or the chain could
+// not be validated with the given verify options.
+func (h Header) Certificates(opts x509.VerifyOptions) ([][]*x509.Certificate, error) {
+	if len(h.certificates) == 0 {
+		return nil, errors.New("go-jose/go-jose: no x5c header present in message")
+	}
+
+	leaf := h.certificates[0]
+	if opts.Intermediates == nil {
+		opts.Intermediates = x509.NewCertPool()
+		for _, intermediate := range h.certificates[1:] {
+			opts.Intermediates.AddCert(intermediate)
+		}
+	}
+
+	return leaf.Verify(opts)
+}
+
+func (parsed rawHeader) set(k HeaderKey, v interface{}) error {
+	b, err := json.Marshal(v)
+	if err != nil {
+		return err
+	}
+
+	parsed[k] = makeRawMessage(b)
+	return nil
+}
+
+// getString gets a string from the raw JSON, defaulting to "".
+func (parsed rawHeader) getString(k HeaderKey) string {
+	v, ok := parsed[k]
+	if !ok || v == nil {
+		return ""
+	}
+	var s string
+	err := json.Unmarshal(*v, &s)
+	if err != nil {
+		return ""
+	}
+	return s
+}
+
+// getByteBuffer gets a byte buffer from the raw JSON. Returns (nil, nil) if
+// not specified.
+func (parsed rawHeader) getByteBuffer(k HeaderKey) (*byteBuffer, error) {
+	v := parsed[k]
+	if v == nil {
+		return nil, nil
+	}
+	var bb *byteBuffer
+	err := json.Unmarshal(*v, &bb)
+	if err != nil {
+		return nil, err
+	}
+	return bb, nil
+}
+
+// getAlgorithm extracts parsed "alg" from the raw JSON as a KeyAlgorithm.
+func (parsed rawHeader) getAlgorithm() KeyAlgorithm {
+	return KeyAlgorithm(parsed.getString(headerAlgorithm))
+}
+
+// getSignatureAlgorithm extracts parsed "alg" from the raw JSON as a SignatureAlgorithm.
+func (parsed rawHeader) getSignatureAlgorithm() SignatureAlgorithm {
+	return SignatureAlgorithm(parsed.getString(headerAlgorithm))
+}
+
+// getEncryption extracts parsed "enc" from the raw JSON.
+func (parsed rawHeader) getEncryption() ContentEncryption {
+	return ContentEncryption(parsed.getString(headerEncryption))
+}
+
+// getCompression extracts parsed "zip" from the raw JSON.
+func (parsed rawHeader) getCompression() CompressionAlgorithm {
+	return CompressionAlgorithm(parsed.getString(headerCompression))
+}
+
+func (parsed rawHeader) getNonce() string {
+	return parsed.getString(headerNonce)
+}
+
+// getEPK extracts parsed "epk" from the raw JSON.
+func (parsed rawHeader) getEPK() (*JSONWebKey, error) {
+	v := parsed[headerEPK]
+	if v == nil {
+		return nil, nil
+	}
+	var epk *JSONWebKey
+	err := json.Unmarshal(*v, &epk)
+	if err != nil {
+		return nil, err
+	}
+	return epk, nil
+}
+
+// getAPU extracts parsed "apu" from the raw JSON.
+func (parsed rawHeader) getAPU() (*byteBuffer, error) {
+	return parsed.getByteBuffer(headerAPU)
+}
+
+// getAPV extracts parsed "apv" from the raw JSON.
+func (parsed rawHeader) getAPV() (*byteBuffer, error) {
+	return parsed.getByteBuffer(headerAPV)
+}
+
+// getIV extracts parsed "iv" from the raw JSON.
+func (parsed rawHeader) getIV() (*byteBuffer, error) {
+	return parsed.getByteBuffer(headerIV)
+}
+
+// getTag extracts parsed "tag" from the raw JSON.
+func (parsed rawHeader) getTag() (*byteBuffer, error) {
+	return parsed.getByteBuffer(headerTag)
+}
+
+// getJWK extracts parsed "jwk" from the raw JSON.
+func (parsed rawHeader) getJWK() (*JSONWebKey, error) {
+	v := parsed[headerJWK]
+	if v == nil {
+		return nil, nil
+	}
+	var jwk *JSONWebKey
+	err := json.Unmarshal(*v, &jwk)
+	if err != nil {
+		return nil, err
+	}
+	return jwk, nil
+}
+
+// getCritical extracts parsed "crit" from the raw JSON. If omitted, it
+// returns an empty slice.
+func (parsed rawHeader) getCritical() ([]string, error) {
+	v := parsed[headerCritical]
+	if v == nil {
+		return nil, nil
+	}
+
+	var q []string
+	err := json.Unmarshal(*v, &q)
+	if err != nil {
+		return nil, err
+	}
+	return q, nil
+}
+
+// getS2C extracts parsed "p2c" from the raw JSON.
+func (parsed rawHeader) getP2C() (int, error) {
+	v := parsed[headerP2C]
+	if v == nil {
+		return 0, nil
+	}
+
+	var p2c int
+	err := json.Unmarshal(*v, &p2c)
+	if err != nil {
+		return 0, err
+	}
+	return p2c, nil
+}
+
+// getS2S extracts parsed "p2s" from the raw JSON.
+func (parsed rawHeader) getP2S() (*byteBuffer, error) {
+	return parsed.getByteBuffer(headerP2S)
+}
+
+// getB64 extracts parsed "b64" from the raw JSON, defaulting to true.
+func (parsed rawHeader) getB64() (bool, error) {
+	v := parsed[headerB64]
+	if v == nil {
+		return true, nil
+	}
+
+	var b64 bool
+	err := json.Unmarshal(*v, &b64)
+	if err != nil {
+		return true, err
+	}
+	return b64, nil
+}
+
+// sanitized produces a cleaned-up header object from the raw JSON.
+func (parsed rawHeader) sanitized() (h Header, err error) {
+	for k, v := range parsed {
+		if v == nil {
+			continue
+		}
+		switch k {
+		case headerJWK:
+			var jwk *JSONWebKey
+			err = json.Unmarshal(*v, &jwk)
+			if err != nil {
+				err = fmt.Errorf("failed to unmarshal JWK: %v: %#v", err, string(*v))
+				return
+			}
+			h.JSONWebKey = jwk
+		case headerKeyID:
+			var s string
+			err = json.Unmarshal(*v, &s)
+			if err != nil {
+				err = fmt.Errorf("failed to unmarshal key ID: %v: %#v", err, string(*v))
+				return
+			}
+			h.KeyID = s
+		case headerAlgorithm:
+			var s string
+			err = json.Unmarshal(*v, &s)
+			if err != nil {
+				err = fmt.Errorf("failed to unmarshal algorithm: %v: %#v", err, string(*v))
+				return
+			}
+			h.Algorithm = s
+		case headerNonce:
+			var s string
+			err = json.Unmarshal(*v, &s)
+			if err != nil {
+				err = fmt.Errorf("failed to unmarshal nonce: %v: %#v", err, string(*v))
+				return
+			}
+			h.Nonce = s
+		case headerX5c:
+			c := []string{}
+			err = json.Unmarshal(*v, &c)
+			if err != nil {
+				err = fmt.Errorf("failed to unmarshal x5c header: %v: %#v", err, string(*v))
+				return
+			}
+			h.certificates, err = parseCertificateChain(c)
+			if err != nil {
+				err = fmt.Errorf("failed to unmarshal x5c header: %v: %#v", err, string(*v))
+				return
+			}
+		default:
+			if h.ExtraHeaders == nil {
+				h.ExtraHeaders = map[HeaderKey]interface{}{}
+			}
+			var v2 interface{}
+			err = json.Unmarshal(*v, &v2)
+			if err != nil {
+				err = fmt.Errorf("failed to unmarshal value: %v: %#v", err, string(*v))
+				return
+			}
+			h.ExtraHeaders[k] = v2
+		}
+	}
+	return
+}
+
+func parseCertificateChain(chain []string) ([]*x509.Certificate, error) {
+	out := make([]*x509.Certificate, len(chain))
+	for i, cert := range chain {
+		raw, err := base64.StdEncoding.DecodeString(cert)
+		if err != nil {
+			return nil, err
+		}
+		out[i], err = x509.ParseCertificate(raw)
+		if err != nil {
+			return nil, err
+		}
+	}
+	return out, nil
+}
+
+func (parsed rawHeader) isSet(k HeaderKey) bool {
+	dvr := parsed[k]
+	if dvr == nil {
+		return false
+	}
+
+	var dv interface{}
+	err := json.Unmarshal(*dvr, &dv)
+	if err != nil {
+		return true
+	}
+
+	if dvStr, ok := dv.(string); ok {
+		return dvStr != ""
+	}
+
+	return true
+}
+
+// Merge headers from src into dst, giving precedence to headers from l.
+func (parsed rawHeader) merge(src *rawHeader) {
+	if src == nil {
+		return
+	}
+
+	for k, v := range *src {
+		if parsed.isSet(k) {
+			continue
+		}
+
+		parsed[k] = v
+	}
+}
+
+// Get JOSE name of curve
+func curveName(crv elliptic.Curve) (string, error) {
+	switch crv {
+	case elliptic.P256():
+		return "P-256", nil
+	case elliptic.P384():
+		return "P-384", nil
+	case elliptic.P521():
+		return "P-521", nil
+	default:
+		return "", fmt.Errorf("go-jose/go-jose: unsupported/unknown elliptic curve")
+	}
+}
+
+// Get size of curve in bytes
+func curveSize(crv elliptic.Curve) int {
+	bits := crv.Params().BitSize
+
+	div := bits / 8
+	mod := bits % 8
+
+	if mod == 0 {
+		return div
+	}
+
+	return div + 1
+}
+
+func makeRawMessage(b []byte) *json.RawMessage {
+	rm := json.RawMessage(b)
+	return &rm
+}
diff --git a/vendor/github.com/go-jose/go-jose/v3/signing.go b/vendor/github.com/go-jose/go-jose/v3/signing.go
new file mode 100644
index 0000000000..81d55f5875
--- /dev/null
+++ b/vendor/github.com/go-jose/go-jose/v3/signing.go
@@ -0,0 +1,450 @@
+/*-
+ * Copyright 2014 Square Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package jose
+
+import (
+	"bytes"
+	"crypto/ecdsa"
+	"crypto/ed25519"
+	"crypto/rsa"
+	"encoding/base64"
+	"errors"
+	"fmt"
+
+	"github.com/go-jose/go-jose/v3/json"
+)
+
+// NonceSource represents a source of random nonces to go into JWS objects
+type NonceSource interface {
+	Nonce() (string, error)
+}
+
+// Signer represents a signer which takes a payload and produces a signed JWS object.
+type Signer interface {
+	Sign(payload []byte) (*JSONWebSignature, error)
+	Options() SignerOptions
+}
+
+// SigningKey represents an algorithm/key used to sign a message.
+type SigningKey struct {
+	Algorithm SignatureAlgorithm
+	Key       interface{}
+}
+
+// SignerOptions represents options that can be set when creating signers.
+type SignerOptions struct {
+	NonceSource NonceSource
+	EmbedJWK    bool
+
+	// Optional map of additional keys to be inserted into the protected header
+	// of a JWS object. Some specifications which make use of JWS like to insert
+	// additional values here. All values must be JSON-serializable.
+	ExtraHeaders map[HeaderKey]interface{}
+}
+
+// WithHeader adds an arbitrary value to the ExtraHeaders map, initializing it
+// if necessary. It returns itself and so can be used in a fluent style.
+func (so *SignerOptions) WithHeader(k HeaderKey, v interface{}) *SignerOptions {
+	if so.ExtraHeaders == nil {
+		so.ExtraHeaders = map[HeaderKey]interface{}{}
+	}
+	so.ExtraHeaders[k] = v
+	return so
+}
+
+// WithContentType adds a content type ("cty") header and returns the updated
+// SignerOptions.
+func (so *SignerOptions) WithContentType(contentType ContentType) *SignerOptions {
+	return so.WithHeader(HeaderContentType, contentType)
+}
+
+// WithType adds a type ("typ") header and returns the updated SignerOptions.
+func (so *SignerOptions) WithType(typ ContentType) *SignerOptions {
+	return so.WithHeader(HeaderType, typ)
+}
+
+// WithCritical adds the given names to the critical ("crit") header and returns
+// the updated SignerOptions.
+func (so *SignerOptions) WithCritical(names ...string) *SignerOptions {
+	if so.ExtraHeaders[headerCritical] == nil {
+		so.WithHeader(headerCritical, make([]string, 0, len(names)))
+	}
+	crit := so.ExtraHeaders[headerCritical].([]string)
+	so.ExtraHeaders[headerCritical] = append(crit, names...)
+	return so
+}
+
+// WithBase64 adds a base64url-encode payload ("b64") header and returns the updated
+// SignerOptions. When the "b64" value is "false", the payload is not base64 encoded.
+func (so *SignerOptions) WithBase64(b64 bool) *SignerOptions {
+	if !b64 {
+		so.WithHeader(headerB64, b64)
+		so.WithCritical(headerB64)
+	}
+	return so
+}
+
+type payloadSigner interface {
+	signPayload(payload []byte, alg SignatureAlgorithm) (Signature, error)
+}
+
+type payloadVerifier interface {
+	verifyPayload(payload []byte, signature []byte, alg SignatureAlgorithm) error
+}
+
+type genericSigner struct {
+	recipients   []recipientSigInfo
+	nonceSource  NonceSource
+	embedJWK     bool
+	extraHeaders map[HeaderKey]interface{}
+}
+
+type recipientSigInfo struct {
+	sigAlg    SignatureAlgorithm
+	publicKey func() *JSONWebKey
+	signer    payloadSigner
+}
+
+func staticPublicKey(jwk *JSONWebKey) func() *JSONWebKey {
+	return func() *JSONWebKey {
+		return jwk
+	}
+}
+
+// NewSigner creates an appropriate signer based on the key type
+func NewSigner(sig SigningKey, opts *SignerOptions) (Signer, error) {
+	return NewMultiSigner([]SigningKey{sig}, opts)
+}
+
+// NewMultiSigner creates a signer for multiple recipients
+func NewMultiSigner(sigs []SigningKey, opts *SignerOptions) (Signer, error) {
+	signer := &genericSigner{recipients: []recipientSigInfo{}}
+
+	if opts != nil {
+		signer.nonceSource = opts.NonceSource
+		signer.embedJWK = opts.EmbedJWK
+		signer.extraHeaders = opts.ExtraHeaders
+	}
+
+	for _, sig := range sigs {
+		err := signer.addRecipient(sig.Algorithm, sig.Key)
+		if err != nil {
+			return nil, err
+		}
+	}
+
+	return signer, nil
+}
+
+// newVerifier creates a verifier based on the key type
+func newVerifier(verificationKey interface{}) (payloadVerifier, error) {
+	switch verificationKey := verificationKey.(type) {
+	case ed25519.PublicKey:
+		return &edEncrypterVerifier{
+			publicKey: verificationKey,
+		}, nil
+	case *rsa.PublicKey:
+		return &rsaEncrypterVerifier{
+			publicKey: verificationKey,
+		}, nil
+	case *ecdsa.PublicKey:
+		return &ecEncrypterVerifier{
+			publicKey: verificationKey,
+		}, nil
+	case []byte:
+		return &symmetricMac{
+			key: verificationKey,
+		}, nil
+	case JSONWebKey:
+		return newVerifier(verificationKey.Key)
+	case *JSONWebKey:
+		return newVerifier(verificationKey.Key)
+	}
+	if ov, ok := verificationKey.(OpaqueVerifier); ok {
+		return &opaqueVerifier{verifier: ov}, nil
+	}
+	return nil, ErrUnsupportedKeyType
+}
+
+func (ctx *genericSigner) addRecipient(alg SignatureAlgorithm, signingKey interface{}) error {
+	recipient, err := makeJWSRecipient(alg, signingKey)
+	if err != nil {
+		return err
+	}
+
+	ctx.recipients = append(ctx.recipients, recipient)
+	return nil
+}
+
+func makeJWSRecipient(alg SignatureAlgorithm, signingKey interface{}) (recipientSigInfo, error) {
+	switch signingKey := signingKey.(type) {
+	case ed25519.PrivateKey:
+		return newEd25519Signer(alg, signingKey)
+	case *rsa.PrivateKey:
+		return newRSASigner(alg, signingKey)
+	case *ecdsa.PrivateKey:
+		return newECDSASigner(alg, signingKey)
+	case []byte:
+		return newSymmetricSigner(alg, signingKey)
+	case JSONWebKey:
+		return newJWKSigner(alg, signingKey)
+	case *JSONWebKey:
+		return newJWKSigner(alg, *signingKey)
+	}
+	if signer, ok := signingKey.(OpaqueSigner); ok {
+		return newOpaqueSigner(alg, signer)
+	}
+	return recipientSigInfo{}, ErrUnsupportedKeyType
+}
+
+func newJWKSigner(alg SignatureAlgorithm, signingKey JSONWebKey) (recipientSigInfo, error) {
+	recipient, err := makeJWSRecipient(alg, signingKey.Key)
+	if err != nil {
+		return recipientSigInfo{}, err
+	}
+	if recipient.publicKey != nil && recipient.publicKey() != nil {
+		// recipient.publicKey is a JWK synthesized for embedding when recipientSigInfo
+		// was created for the inner key (such as a RSA or ECDSA public key). It contains
+		// the pub key for embedding, but doesn't have extra params like key id.
+		publicKey := signingKey
+		publicKey.Key = recipient.publicKey().Key
+		recipient.publicKey = staticPublicKey(&publicKey)
+
+		// This should be impossible, but let's check anyway.
+		if !recipient.publicKey().IsPublic() {
+			return recipientSigInfo{}, errors.New("go-jose/go-jose: public key was unexpectedly not public")
+		}
+	}
+	return recipient, nil
+}
+
+func (ctx *genericSigner) Sign(payload []byte) (*JSONWebSignature, error) {
+	obj := &JSONWebSignature{}
+	obj.payload = payload
+	obj.Signatures = make([]Signature, len(ctx.recipients))
+
+	for i, recipient := range ctx.recipients {
+		protected := map[HeaderKey]interface{}{
+			headerAlgorithm: string(recipient.sigAlg),
+		}
+
+		if recipient.publicKey != nil && recipient.publicKey() != nil {
+			// We want to embed the JWK or set the kid header, but not both. Having a protected
+			// header that contains an embedded JWK while also simultaneously containing the kid
+			// header is confusing, and at least in ACME the two are considered to be mutually
+			// exclusive. The fact that both can exist at the same time is a somewhat unfortunate
+			// result of the JOSE spec. We've decided that this library will only include one or
+			// the other to avoid this confusion.
+			//
+			// See https://github.com/go-jose/go-jose/issues/157 for more context.
+			if ctx.embedJWK {
+				protected[headerJWK] = recipient.publicKey()
+			} else {
+				keyID := recipient.publicKey().KeyID
+				if keyID != "" {
+					protected[headerKeyID] = keyID
+				}
+			}
+		}
+
+		if ctx.nonceSource != nil {
+			nonce, err := ctx.nonceSource.Nonce()
+			if err != nil {
+				return nil, fmt.Errorf("go-jose/go-jose: Error generating nonce: %v", err)
+			}
+			protected[headerNonce] = nonce
+		}
+
+		for k, v := range ctx.extraHeaders {
+			protected[k] = v
+		}
+
+		serializedProtected := mustSerializeJSON(protected)
+		needsBase64 := true
+
+		if b64, ok := protected[headerB64]; ok {
+			if needsBase64, ok = b64.(bool); !ok {
+				return nil, errors.New("go-jose/go-jose: Invalid b64 header parameter")
+			}
+		}
+
+		var input bytes.Buffer
+
+		input.WriteString(base64.RawURLEncoding.EncodeToString(serializedProtected))
+		input.WriteByte('.')
+
+		if needsBase64 {
+			input.WriteString(base64.RawURLEncoding.EncodeToString(payload))
+		} else {
+			input.Write(payload)
+		}
+
+		signatureInfo, err := recipient.signer.signPayload(input.Bytes(), recipient.sigAlg)
+		if err != nil {
+			return nil, err
+		}
+
+		signatureInfo.protected = &rawHeader{}
+		for k, v := range protected {
+			b, err := json.Marshal(v)
+			if err != nil {
+				return nil, fmt.Errorf("go-jose/go-jose: Error marshalling item %#v: %v", k, err)
+			}
+			(*signatureInfo.protected)[k] = makeRawMessage(b)
+		}
+		obj.Signatures[i] = signatureInfo
+	}
+
+	return obj, nil
+}
+
+func (ctx *genericSigner) Options() SignerOptions {
+	return SignerOptions{
+		NonceSource:  ctx.nonceSource,
+		EmbedJWK:     ctx.embedJWK,
+		ExtraHeaders: ctx.extraHeaders,
+	}
+}
+
+// Verify validates the signature on the object and returns the payload.
+// This function does not support multi-signature, if you desire multi-sig
+// verification use VerifyMulti instead.
+//
+// Be careful when verifying signatures based on embedded JWKs inside the
+// payload header. You cannot assume that the key received in a payload is
+// trusted.
+func (obj JSONWebSignature) Verify(verificationKey interface{}) ([]byte, error) {
+	err := obj.DetachedVerify(obj.payload, verificationKey)
+	if err != nil {
+		return nil, err
+	}
+	return obj.payload, nil
+}
+
+// UnsafePayloadWithoutVerification returns the payload without
+// verifying it. The content returned from this function cannot be
+// trusted.
+func (obj JSONWebSignature) UnsafePayloadWithoutVerification() []byte {
+	return obj.payload
+}
+
+// DetachedVerify validates a detached signature on the given payload. In
+// most cases, you will probably want to use Verify instead. DetachedVerify
+// is only useful if you have a payload and signature that are separated from
+// each other.
+func (obj JSONWebSignature) DetachedVerify(payload []byte, verificationKey interface{}) error {
+	key := tryJWKS(verificationKey, obj.headers()...)
+	verifier, err := newVerifier(key)
+	if err != nil {
+		return err
+	}
+
+	if len(obj.Signatures) > 1 {
+		return errors.New("go-jose/go-jose: too many signatures in payload; expecting only one")
+	}
+
+	signature := obj.Signatures[0]
+	headers := signature.mergedHeaders()
+	critical, err := headers.getCritical()
+	if err != nil {
+		return err
+	}
+
+	for _, name := range critical {
+		if !supportedCritical[name] {
+			return ErrCryptoFailure
+		}
+	}
+
+	input, err := obj.computeAuthData(payload, &signature)
+	if err != nil {
+		return ErrCryptoFailure
+	}
+
+	alg := headers.getSignatureAlgorithm()
+	err = verifier.verifyPayload(input, signature.Signature, alg)
+	if err == nil {
+		return nil
+	}
+
+	return ErrCryptoFailure
+}
+
+// VerifyMulti validates (one of the multiple) signatures on the object and
+// returns the index of the signature that was verified, along with the signature
+// object and the payload. We return the signature and index to guarantee that
+// callers are getting the verified value.
+func (obj JSONWebSignature) VerifyMulti(verificationKey interface{}) (int, Signature, []byte, error) {
+	idx, sig, err := obj.DetachedVerifyMulti(obj.payload, verificationKey)
+	if err != nil {
+		return -1, Signature{}, nil, err
+	}
+	return idx, sig, obj.payload, nil
+}
+
+// DetachedVerifyMulti validates a detached signature on the given payload with
+// a signature/object that has potentially multiple signers. This returns the index
+// of the signature that was verified, along with the signature object. We return
+// the signature and index to guarantee that callers are getting the verified value.
+//
+// In most cases, you will probably want to use Verify or VerifyMulti instead.
+// DetachedVerifyMulti is only useful if you have a payload and signature that are
+// separated from each other, and the signature can have multiple signers at the
+// same time.
+func (obj JSONWebSignature) DetachedVerifyMulti(payload []byte, verificationKey interface{}) (int, Signature, error) {
+	key := tryJWKS(verificationKey, obj.headers()...)
+	verifier, err := newVerifier(key)
+	if err != nil {
+		return -1, Signature{}, err
+	}
+
+outer:
+	for i, signature := range obj.Signatures {
+		headers := signature.mergedHeaders()
+		critical, err := headers.getCritical()
+		if err != nil {
+			continue
+		}
+
+		for _, name := range critical {
+			if !supportedCritical[name] {
+				continue outer
+			}
+		}
+
+		input, err := obj.computeAuthData(payload, &signature)
+		if err != nil {
+			continue
+		}
+
+		alg := headers.getSignatureAlgorithm()
+		err = verifier.verifyPayload(input, signature.Signature, alg)
+		if err == nil {
+			return i, signature, nil
+		}
+	}
+
+	return -1, Signature{}, ErrCryptoFailure
+}
+
+func (obj JSONWebSignature) headers() []Header {
+	headers := make([]Header, len(obj.Signatures))
+	for i, sig := range obj.Signatures {
+		headers[i] = sig.Header
+	}
+	return headers
+}
diff --git a/vendor/github.com/go-jose/go-jose/v3/symmetric.go b/vendor/github.com/go-jose/go-jose/v3/symmetric.go
new file mode 100644
index 0000000000..fb54775ed6
--- /dev/null
+++ b/vendor/github.com/go-jose/go-jose/v3/symmetric.go
@@ -0,0 +1,495 @@
+/*-
+ * Copyright 2014 Square Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package jose
+
+import (
+	"bytes"
+	"crypto/aes"
+	"crypto/cipher"
+	"crypto/hmac"
+	"crypto/rand"
+	"crypto/sha256"
+	"crypto/sha512"
+	"crypto/subtle"
+	"errors"
+	"fmt"
+	"hash"
+	"io"
+
+	"golang.org/x/crypto/pbkdf2"
+
+	josecipher "github.com/go-jose/go-jose/v3/cipher"
+)
+
+// RandReader is a cryptographically secure random number generator (stubbed out in tests).
+var RandReader = rand.Reader
+
+const (
+	// RFC7518 recommends a minimum of 1,000 iterations:
+	// https://tools.ietf.org/html/rfc7518#section-4.8.1.2
+	// NIST recommends a minimum of 10,000:
+	// https://pages.nist.gov/800-63-3/sp800-63b.html
+	// 1Password uses 100,000:
+	// https://support.1password.com/pbkdf2/
+	defaultP2C = 100000
+	// Default salt size: 128 bits
+	defaultP2SSize = 16
+)
+
+// Dummy key cipher for shared symmetric key mode
+type symmetricKeyCipher struct {
+	key []byte // Pre-shared content-encryption key
+	p2c int    // PBES2 Count
+	p2s []byte // PBES2 Salt Input
+}
+
+// Signer/verifier for MAC modes
+type symmetricMac struct {
+	key []byte
+}
+
+// Input/output from an AEAD operation
+type aeadParts struct {
+	iv, ciphertext, tag []byte
+}
+
+// A content cipher based on an AEAD construction
+type aeadContentCipher struct {
+	keyBytes     int
+	authtagBytes int
+	getAead      func(key []byte) (cipher.AEAD, error)
+}
+
+// Random key generator
+type randomKeyGenerator struct {
+	size int
+}
+
+// Static key generator
+type staticKeyGenerator struct {
+	key []byte
+}
+
+// Create a new content cipher based on AES-GCM
+func newAESGCM(keySize int) contentCipher {
+	return &aeadContentCipher{
+		keyBytes:     keySize,
+		authtagBytes: 16,
+		getAead: func(key []byte) (cipher.AEAD, error) {
+			aes, err := aes.NewCipher(key)
+			if err != nil {
+				return nil, err
+			}
+
+			return cipher.NewGCM(aes)
+		},
+	}
+}
+
+// Create a new content cipher based on AES-CBC+HMAC
+func newAESCBC(keySize int) contentCipher {
+	return &aeadContentCipher{
+		keyBytes:     keySize * 2,
+		authtagBytes: keySize,
+		getAead: func(key []byte) (cipher.AEAD, error) {
+			return josecipher.NewCBCHMAC(key, aes.NewCipher)
+		},
+	}
+}
+
+// Get an AEAD cipher object for the given content encryption algorithm
+func getContentCipher(alg ContentEncryption) contentCipher {
+	switch alg {
+	case A128GCM:
+		return newAESGCM(16)
+	case A192GCM:
+		return newAESGCM(24)
+	case A256GCM:
+		return newAESGCM(32)
+	case A128CBC_HS256:
+		return newAESCBC(16)
+	case A192CBC_HS384:
+		return newAESCBC(24)
+	case A256CBC_HS512:
+		return newAESCBC(32)
+	default:
+		return nil
+	}
+}
+
+// getPbkdf2Params returns the key length and hash function used in
+// pbkdf2.Key.
+func getPbkdf2Params(alg KeyAlgorithm) (int, func() hash.Hash) {
+	switch alg {
+	case PBES2_HS256_A128KW:
+		return 16, sha256.New
+	case PBES2_HS384_A192KW:
+		return 24, sha512.New384
+	case PBES2_HS512_A256KW:
+		return 32, sha512.New
+	default:
+		panic("invalid algorithm")
+	}
+}
+
+// getRandomSalt generates a new salt of the given size.
+func getRandomSalt(size int) ([]byte, error) {
+	salt := make([]byte, size)
+	_, err := io.ReadFull(RandReader, salt)
+	if err != nil {
+		return nil, err
+	}
+
+	return salt, nil
+}
+
+// newSymmetricRecipient creates a JWE encrypter based on AES-GCM key wrap.
+func newSymmetricRecipient(keyAlg KeyAlgorithm, key []byte) (recipientKeyInfo, error) {
+	switch keyAlg {
+	case DIRECT, A128GCMKW, A192GCMKW, A256GCMKW, A128KW, A192KW, A256KW:
+	case PBES2_HS256_A128KW, PBES2_HS384_A192KW, PBES2_HS512_A256KW:
+	default:
+		return recipientKeyInfo{}, ErrUnsupportedAlgorithm
+	}
+
+	return recipientKeyInfo{
+		keyAlg: keyAlg,
+		keyEncrypter: &symmetricKeyCipher{
+			key: key,
+		},
+	}, nil
+}
+
+// newSymmetricSigner creates a recipientSigInfo based on the given key.
+func newSymmetricSigner(sigAlg SignatureAlgorithm, key []byte) (recipientSigInfo, error) {
+	// Verify that key management algorithm is supported by this encrypter
+	switch sigAlg {
+	case HS256, HS384, HS512:
+	default:
+		return recipientSigInfo{}, ErrUnsupportedAlgorithm
+	}
+
+	return recipientSigInfo{
+		sigAlg: sigAlg,
+		signer: &symmetricMac{
+			key: key,
+		},
+	}, nil
+}
+
+// Generate a random key for the given content cipher
+func (ctx randomKeyGenerator) genKey() ([]byte, rawHeader, error) {
+	key := make([]byte, ctx.size)
+	_, err := io.ReadFull(RandReader, key)
+	if err != nil {
+		return nil, rawHeader{}, err
+	}
+
+	return key, rawHeader{}, nil
+}
+
+// Key size for random generator
+func (ctx randomKeyGenerator) keySize() int {
+	return ctx.size
+}
+
+// Generate a static key (for direct mode)
+func (ctx staticKeyGenerator) genKey() ([]byte, rawHeader, error) {
+	cek := make([]byte, len(ctx.key))
+	copy(cek, ctx.key)
+	return cek, rawHeader{}, nil
+}
+
+// Key size for static generator
+func (ctx staticKeyGenerator) keySize() int {
+	return len(ctx.key)
+}
+
+// Get key size for this cipher
+func (ctx aeadContentCipher) keySize() int {
+	return ctx.keyBytes
+}
+
+// Encrypt some data
+func (ctx aeadContentCipher) encrypt(key, aad, pt []byte) (*aeadParts, error) {
+	// Get a new AEAD instance
+	aead, err := ctx.getAead(key)
+	if err != nil {
+		return nil, err
+	}
+
+	// Initialize a new nonce
+	iv := make([]byte, aead.NonceSize())
+	_, err = io.ReadFull(RandReader, iv)
+	if err != nil {
+		return nil, err
+	}
+
+	ciphertextAndTag := aead.Seal(nil, iv, pt, aad)
+	offset := len(ciphertextAndTag) - ctx.authtagBytes
+
+	return &aeadParts{
+		iv:         iv,
+		ciphertext: ciphertextAndTag[:offset],
+		tag:        ciphertextAndTag[offset:],
+	}, nil
+}
+
+// Decrypt some data
+func (ctx aeadContentCipher) decrypt(key, aad []byte, parts *aeadParts) ([]byte, error) {
+	aead, err := ctx.getAead(key)
+	if err != nil {
+		return nil, err
+	}
+
+	if len(parts.iv) != aead.NonceSize() || len(parts.tag) < ctx.authtagBytes {
+		return nil, ErrCryptoFailure
+	}
+
+	return aead.Open(nil, parts.iv, append(parts.ciphertext, parts.tag...), aad)
+}
+
+// Encrypt the content encryption key.
+func (ctx *symmetricKeyCipher) encryptKey(cek []byte, alg KeyAlgorithm) (recipientInfo, error) {
+	switch alg {
+	case DIRECT:
+		return recipientInfo{
+			header: &rawHeader{},
+		}, nil
+	case A128GCMKW, A192GCMKW, A256GCMKW:
+		aead := newAESGCM(len(ctx.key))
+
+		parts, err := aead.encrypt(ctx.key, []byte{}, cek)
+		if err != nil {
+			return recipientInfo{}, err
+		}
+
+		header := &rawHeader{}
+
+		if err = header.set(headerIV, newBuffer(parts.iv)); err != nil {
+			return recipientInfo{}, err
+		}
+
+		if err = header.set(headerTag, newBuffer(parts.tag)); err != nil {
+			return recipientInfo{}, err
+		}
+
+		return recipientInfo{
+			header:       header,
+			encryptedKey: parts.ciphertext,
+		}, nil
+	case A128KW, A192KW, A256KW:
+		block, err := aes.NewCipher(ctx.key)
+		if err != nil {
+			return recipientInfo{}, err
+		}
+
+		jek, err := josecipher.KeyWrap(block, cek)
+		if err != nil {
+			return recipientInfo{}, err
+		}
+
+		return recipientInfo{
+			encryptedKey: jek,
+			header:       &rawHeader{},
+		}, nil
+	case PBES2_HS256_A128KW, PBES2_HS384_A192KW, PBES2_HS512_A256KW:
+		if len(ctx.p2s) == 0 {
+			salt, err := getRandomSalt(defaultP2SSize)
+			if err != nil {
+				return recipientInfo{}, err
+			}
+			ctx.p2s = salt
+		}
+
+		if ctx.p2c <= 0 {
+			ctx.p2c = defaultP2C
+		}
+
+		// salt is UTF8(Alg) || 0x00 || Salt Input
+		salt := bytes.Join([][]byte{[]byte(alg), ctx.p2s}, []byte{0x00})
+
+		// derive key
+		keyLen, h := getPbkdf2Params(alg)
+		key := pbkdf2.Key(ctx.key, salt, ctx.p2c, keyLen, h)
+
+		// use AES cipher with derived key
+		block, err := aes.NewCipher(key)
+		if err != nil {
+			return recipientInfo{}, err
+		}
+
+		jek, err := josecipher.KeyWrap(block, cek)
+		if err != nil {
+			return recipientInfo{}, err
+		}
+
+		header := &rawHeader{}
+
+		if err = header.set(headerP2C, ctx.p2c); err != nil {
+			return recipientInfo{}, err
+		}
+
+		if err = header.set(headerP2S, newBuffer(ctx.p2s)); err != nil {
+			return recipientInfo{}, err
+		}
+
+		return recipientInfo{
+			encryptedKey: jek,
+			header:       header,
+		}, nil
+	}
+
+	return recipientInfo{}, ErrUnsupportedAlgorithm
+}
+
+// Decrypt the content encryption key.
+func (ctx *symmetricKeyCipher) decryptKey(headers rawHeader, recipient *recipientInfo, generator keyGenerator) ([]byte, error) {
+	switch headers.getAlgorithm() {
+	case DIRECT:
+		cek := make([]byte, len(ctx.key))
+		copy(cek, ctx.key)
+		return cek, nil
+	case A128GCMKW, A192GCMKW, A256GCMKW:
+		aead := newAESGCM(len(ctx.key))
+
+		iv, err := headers.getIV()
+		if err != nil {
+			return nil, fmt.Errorf("go-jose/go-jose: invalid IV: %v", err)
+		}
+		tag, err := headers.getTag()
+		if err != nil {
+			return nil, fmt.Errorf("go-jose/go-jose: invalid tag: %v", err)
+		}
+
+		parts := &aeadParts{
+			iv:         iv.bytes(),
+			ciphertext: recipient.encryptedKey,
+			tag:        tag.bytes(),
+		}
+
+		cek, err := aead.decrypt(ctx.key, []byte{}, parts)
+		if err != nil {
+			return nil, err
+		}
+
+		return cek, nil
+	case A128KW, A192KW, A256KW:
+		block, err := aes.NewCipher(ctx.key)
+		if err != nil {
+			return nil, err
+		}
+
+		cek, err := josecipher.KeyUnwrap(block, recipient.encryptedKey)
+		if err != nil {
+			return nil, err
+		}
+		return cek, nil
+	case PBES2_HS256_A128KW, PBES2_HS384_A192KW, PBES2_HS512_A256KW:
+		p2s, err := headers.getP2S()
+		if err != nil {
+			return nil, fmt.Errorf("go-jose/go-jose: invalid P2S: %v", err)
+		}
+		if p2s == nil || len(p2s.data) == 0 {
+			return nil, fmt.Errorf("go-jose/go-jose: invalid P2S: must be present")
+		}
+
+		p2c, err := headers.getP2C()
+		if err != nil {
+			return nil, fmt.Errorf("go-jose/go-jose: invalid P2C: %v", err)
+		}
+		if p2c <= 0 {
+			return nil, fmt.Errorf("go-jose/go-jose: invalid P2C: must be a positive integer")
+		}
+
+		// salt is UTF8(Alg) || 0x00 || Salt Input
+		alg := headers.getAlgorithm()
+		salt := bytes.Join([][]byte{[]byte(alg), p2s.bytes()}, []byte{0x00})
+
+		// derive key
+		keyLen, h := getPbkdf2Params(alg)
+		key := pbkdf2.Key(ctx.key, salt, p2c, keyLen, h)
+
+		// use AES cipher with derived key
+		block, err := aes.NewCipher(key)
+		if err != nil {
+			return nil, err
+		}
+
+		cek, err := josecipher.KeyUnwrap(block, recipient.encryptedKey)
+		if err != nil {
+			return nil, err
+		}
+		return cek, nil
+	}
+
+	return nil, ErrUnsupportedAlgorithm
+}
+
+// Sign the given payload
+func (ctx symmetricMac) signPayload(payload []byte, alg SignatureAlgorithm) (Signature, error) {
+	mac, err := ctx.hmac(payload, alg)
+	if err != nil {
+		return Signature{}, errors.New("go-jose/go-jose: failed to compute hmac")
+	}
+
+	return Signature{
+		Signature: mac,
+		protected: &rawHeader{},
+	}, nil
+}
+
+// Verify the given payload
+func (ctx symmetricMac) verifyPayload(payload []byte, mac []byte, alg SignatureAlgorithm) error {
+	expected, err := ctx.hmac(payload, alg)
+	if err != nil {
+		return errors.New("go-jose/go-jose: failed to compute hmac")
+	}
+
+	if len(mac) != len(expected) {
+		return errors.New("go-jose/go-jose: invalid hmac")
+	}
+
+	match := subtle.ConstantTimeCompare(mac, expected)
+	if match != 1 {
+		return errors.New("go-jose/go-jose: invalid hmac")
+	}
+
+	return nil
+}
+
+// Compute the HMAC based on the given alg value
+func (ctx symmetricMac) hmac(payload []byte, alg SignatureAlgorithm) ([]byte, error) {
+	var hash func() hash.Hash
+
+	switch alg {
+	case HS256:
+		hash = sha256.New
+	case HS384:
+		hash = sha512.New384
+	case HS512:
+		hash = sha512.New
+	default:
+		return nil, ErrUnsupportedAlgorithm
+	}
+
+	hmac := hmac.New(hash, ctx.key)
+
+	// According to documentation, Write() on hash never fails
+	_, _ = hmac.Write(payload)
+	return hmac.Sum(nil), nil
+}
diff --git a/vendor/github.com/klauspost/compress/README.md b/vendor/github.com/klauspost/compress/README.md
index d73fb86e4f..63f2cd5b25 100644
--- a/vendor/github.com/klauspost/compress/README.md
+++ b/vendor/github.com/klauspost/compress/README.md
@@ -16,6 +16,13 @@ This package provides various compression algorithms.
 
 # changelog
 
+* Jan 3rd, 2023 (v1.15.14)
+
+	* flate: Improve speed in big stateless blocks https://github.com/klauspost/compress/pull/718
+	* zstd: Minor speed tweaks by @greatroar in https://github.com/klauspost/compress/pull/716 https://github.com/klauspost/compress/pull/720
+	* export NoGzipResponseWriter for custom ResponseWriter wrappers by @harshavardhana in https://github.com/klauspost/compress/pull/722
+	* s2: Add example for indexing and existing stream https://github.com/klauspost/compress/pull/723
+
 * Dec 11, 2022 (v1.15.13)
 	* zstd: Add [MaxEncodedSize](https://pkg.go.dev/github.com/klauspost/compress@v1.15.13/zstd#Encoder.MaxEncodedSize) to encoder  https://github.com/klauspost/compress/pull/691
 	* zstd: Various tweaks and improvements https://github.com/klauspost/compress/pull/693 https://github.com/klauspost/compress/pull/695 https://github.com/klauspost/compress/pull/696 https://github.com/klauspost/compress/pull/701 https://github.com/klauspost/compress/pull/702 https://github.com/klauspost/compress/pull/703 https://github.com/klauspost/compress/pull/704 https://github.com/klauspost/compress/pull/705 https://github.com/klauspost/compress/pull/706 https://github.com/klauspost/compress/pull/707 https://github.com/klauspost/compress/pull/708
diff --git a/vendor/github.com/klauspost/compress/flate/deflate.go b/vendor/github.com/klauspost/compress/flate/deflate.go
index 07265ddede..82882961a0 100644
--- a/vendor/github.com/klauspost/compress/flate/deflate.go
+++ b/vendor/github.com/klauspost/compress/flate/deflate.go
@@ -294,7 +294,6 @@ func (d *compressor) findMatch(pos int, prevHead int, lookahead int) (length, of
 	}
 	offset = 0
 
-	cGain := 0
 	if d.chain < 100 {
 		for i := prevHead; tries > 0; tries-- {
 			if wEnd == win[i+length] {
@@ -322,10 +321,14 @@ func (d *compressor) findMatch(pos int, prevHead int, lookahead int) (length, of
 		return
 	}
 
+	// Minimum gain to accept a match.
+	cGain := 4
+
 	// Some like it higher (CSV), some like it lower (JSON)
-	const baseCost = 6
+	const baseCost = 3
 	// Base is 4 bytes at with an additional cost.
 	// Matches must be better than this.
+
 	for i := prevHead; tries > 0; tries-- {
 		if wEnd == win[i+length] {
 			n := matchLen(win[i:i+minMatchLook], wPos)
@@ -333,7 +336,7 @@ func (d *compressor) findMatch(pos int, prevHead int, lookahead int) (length, of
 				// Calculate gain. Estimate
 				newGain := d.h.bitLengthRaw(wPos[:n]) - int(offsetExtraBits[offsetCode(uint32(pos-i))]) - baseCost - int(lengthExtraBits[lengthCodes[(n-3)&255]])
 
-				//fmt.Println(n, "gain:", newGain, "prev:", cGain, "raw:", d.h.bitLengthRaw(wPos[:n]))
+				//fmt.Println("gain:", newGain, "prev:", cGain, "raw:", d.h.bitLengthRaw(wPos[:n]), "this-len:", n, "prev-len:", length)
 				if newGain > cGain {
 					length = n
 					offset = pos - i
@@ -490,27 +493,103 @@ func (d *compressor) deflateLazy() {
 		}
 
 		if prevLength >= minMatchLength && s.length <= prevLength {
-			// Check for better match at end...
+			// No better match, but check for better match at end...
 			//
-			// checkOff must be >=2 since we otherwise risk checking s.index
-			// Offset of 2 seems to yield best results.
+			// Skip forward a number of bytes.
+			// Offset of 2 seems to yield best results. 3 is sometimes better.
 			const checkOff = 2
-			prevIndex := s.index - 1
-			if prevIndex+prevLength+checkOff < s.maxInsertIndex {
-				end := lookahead
-				if lookahead > maxMatchLength {
-					end = maxMatchLength
-				}
-				end += prevIndex
-				idx := prevIndex + prevLength - (4 - checkOff)
-				h := hash4(d.window[idx:])
-				ch2 := int(s.hashHead[h]) - s.hashOffset - prevLength + (4 - checkOff)
-				if ch2 > minIndex {
-					length := matchLen(d.window[prevIndex:end], d.window[ch2:])
-					// It seems like a pure length metric is best.
-					if length > prevLength {
-						prevLength = length
-						prevOffset = prevIndex - ch2
+
+			// Check all, except full length
+			if prevLength < maxMatchLength-checkOff {
+				prevIndex := s.index - 1
+				if prevIndex+prevLength < s.maxInsertIndex {
+					end := lookahead
+					if lookahead > maxMatchLength+checkOff {
+						end = maxMatchLength + checkOff
+					}
+					end += prevIndex
+
+					// Hash at match end.
+					h := hash4(d.window[prevIndex+prevLength:])
+					ch2 := int(s.hashHead[h]) - s.hashOffset - prevLength
+					if prevIndex-ch2 != prevOffset && ch2 > minIndex+checkOff {
+						length := matchLen(d.window[prevIndex+checkOff:end], d.window[ch2+checkOff:])
+						// It seems like a pure length metric is best.
+						if length > prevLength {
+							prevLength = length
+							prevOffset = prevIndex - ch2
+
+							// Extend back...
+							for i := checkOff - 1; i >= 0; i-- {
+								if prevLength >= maxMatchLength || d.window[prevIndex+i] != d.window[ch2+i] {
+									// Emit tokens we "owe"
+									for j := 0; j <= i; j++ {
+										d.tokens.AddLiteral(d.window[prevIndex+j])
+										if d.tokens.n == maxFlateBlockTokens {
+											// The block includes the current character
+											if d.err = d.writeBlock(&d.tokens, s.index, false); d.err != nil {
+												return
+											}
+											d.tokens.Reset()
+										}
+										s.index++
+										if s.index < s.maxInsertIndex {
+											h := hash4(d.window[s.index:])
+											ch := s.hashHead[h]
+											s.chainHead = int(ch)
+											s.hashPrev[s.index&windowMask] = ch
+											s.hashHead[h] = uint32(s.index + s.hashOffset)
+										}
+									}
+									break
+								} else {
+									prevLength++
+								}
+							}
+						} else if false {
+							// Check one further ahead.
+							// Only rarely better, disabled for now.
+							prevIndex++
+							h := hash4(d.window[prevIndex+prevLength:])
+							ch2 := int(s.hashHead[h]) - s.hashOffset - prevLength
+							if prevIndex-ch2 != prevOffset && ch2 > minIndex+checkOff {
+								length := matchLen(d.window[prevIndex+checkOff:end], d.window[ch2+checkOff:])
+								// It seems like a pure length metric is best.
+								if length > prevLength+checkOff {
+									prevLength = length
+									prevOffset = prevIndex - ch2
+									prevIndex--
+
+									// Extend back...
+									for i := checkOff; i >= 0; i-- {
+										if prevLength >= maxMatchLength || d.window[prevIndex+i] != d.window[ch2+i-1] {
+											// Emit tokens we "owe"
+											for j := 0; j <= i; j++ {
+												d.tokens.AddLiteral(d.window[prevIndex+j])
+												if d.tokens.n == maxFlateBlockTokens {
+													// The block includes the current character
+													if d.err = d.writeBlock(&d.tokens, s.index, false); d.err != nil {
+														return
+													}
+													d.tokens.Reset()
+												}
+												s.index++
+												if s.index < s.maxInsertIndex {
+													h := hash4(d.window[s.index:])
+													ch := s.hashHead[h]
+													s.chainHead = int(ch)
+													s.hashPrev[s.index&windowMask] = ch
+													s.hashHead[h] = uint32(s.index + s.hashOffset)
+												}
+											}
+											break
+										} else {
+											prevLength++
+										}
+									}
+								}
+							}
+						}
 					}
 				}
 			}
diff --git a/vendor/github.com/klauspost/compress/fse/compress.go b/vendor/github.com/klauspost/compress/fse/compress.go
index 6f341914c6..dac97e58a2 100644
--- a/vendor/github.com/klauspost/compress/fse/compress.go
+++ b/vendor/github.com/klauspost/compress/fse/compress.go
@@ -146,54 +146,51 @@ func (s *Scratch) compress(src []byte) error {
 		c1.encodeZero(tt[src[ip-2]])
 		ip -= 2
 	}
+	src = src[:ip]
 
 	// Main compression loop.
 	switch {
 	case !s.zeroBits && s.actualTableLog <= 8:
 		// We can encode 4 symbols without requiring a flush.
 		// We do not need to check if any output is 0 bits.
-		for ip >= 4 {
+		for ; len(src) >= 4; src = src[:len(src)-4] {
 			s.bw.flush32()
-			v3, v2, v1, v0 := src[ip-4], src[ip-3], src[ip-2], src[ip-1]
+			v3, v2, v1, v0 := src[len(src)-4], src[len(src)-3], src[len(src)-2], src[len(src)-1]
 			c2.encode(tt[v0])
 			c1.encode(tt[v1])
 			c2.encode(tt[v2])
 			c1.encode(tt[v3])
-			ip -= 4
 		}
 	case !s.zeroBits:
 		// We do not need to check if any output is 0 bits.
-		for ip >= 4 {
+		for ; len(src) >= 4; src = src[:len(src)-4] {
 			s.bw.flush32()
-			v3, v2, v1, v0 := src[ip-4], src[ip-3], src[ip-2], src[ip-1]
+			v3, v2, v1, v0 := src[len(src)-4], src[len(src)-3], src[len(src)-2], src[len(src)-1]
 			c2.encode(tt[v0])
 			c1.encode(tt[v1])
 			s.bw.flush32()
 			c2.encode(tt[v2])
 			c1.encode(tt[v3])
-			ip -= 4
 		}
 	case s.actualTableLog <= 8:
 		// We can encode 4 symbols without requiring a flush
-		for ip >= 4 {
+		for ; len(src) >= 4; src = src[:len(src)-4] {
 			s.bw.flush32()
-			v3, v2, v1, v0 := src[ip-4], src[ip-3], src[ip-2], src[ip-1]
+			v3, v2, v1, v0 := src[len(src)-4], src[len(src)-3], src[len(src)-2], src[len(src)-1]
 			c2.encodeZero(tt[v0])
 			c1.encodeZero(tt[v1])
 			c2.encodeZero(tt[v2])
 			c1.encodeZero(tt[v3])
-			ip -= 4
 		}
 	default:
-		for ip >= 4 {
+		for ; len(src) >= 4; src = src[:len(src)-4] {
 			s.bw.flush32()
-			v3, v2, v1, v0 := src[ip-4], src[ip-3], src[ip-2], src[ip-1]
+			v3, v2, v1, v0 := src[len(src)-4], src[len(src)-3], src[len(src)-2], src[len(src)-1]
 			c2.encodeZero(tt[v0])
 			c1.encodeZero(tt[v1])
 			s.bw.flush32()
 			c2.encodeZero(tt[v2])
 			c1.encodeZero(tt[v3])
-			ip -= 4
 		}
 	}
 
@@ -459,15 +456,17 @@ func (s *Scratch) countSimple(in []byte) (max int) {
 	for _, v := range in {
 		s.count[v]++
 	}
-	m := uint32(0)
+	m, symlen := uint32(0), s.symbolLen
 	for i, v := range s.count[:] {
+		if v == 0 {
+			continue
+		}
 		if v > m {
 			m = v
 		}
-		if v > 0 {
-			s.symbolLen = uint16(i) + 1
-		}
+		symlen = uint16(i) + 1
 	}
+	s.symbolLen = symlen
 	return int(m)
 }
 
diff --git a/vendor/github.com/klauspost/compress/huff0/bitreader.go b/vendor/github.com/klauspost/compress/huff0/bitreader.go
index 504a7be9da..e36d9742f9 100644
--- a/vendor/github.com/klauspost/compress/huff0/bitreader.go
+++ b/vendor/github.com/klauspost/compress/huff0/bitreader.go
@@ -67,7 +67,6 @@ func (b *bitReaderBytes) fillFast() {
 
 	// 2 bounds checks.
 	v := b.in[b.off-4 : b.off]
-	v = v[:4]
 	low := (uint32(v[0])) | (uint32(v[1]) << 8) | (uint32(v[2]) << 16) | (uint32(v[3]) << 24)
 	b.value |= uint64(low) << (b.bitsRead - 32)
 	b.bitsRead -= 32
@@ -88,8 +87,7 @@ func (b *bitReaderBytes) fill() {
 		return
 	}
 	if b.off > 4 {
-		v := b.in[b.off-4:]
-		v = v[:4]
+		v := b.in[b.off-4 : b.off]
 		low := (uint32(v[0])) | (uint32(v[1]) << 8) | (uint32(v[2]) << 16) | (uint32(v[3]) << 24)
 		b.value |= uint64(low) << (b.bitsRead - 32)
 		b.bitsRead -= 32
@@ -179,7 +177,6 @@ func (b *bitReaderShifted) fillFast() {
 
 	// 2 bounds checks.
 	v := b.in[b.off-4 : b.off]
-	v = v[:4]
 	low := (uint32(v[0])) | (uint32(v[1]) << 8) | (uint32(v[2]) << 16) | (uint32(v[3]) << 24)
 	b.value |= uint64(low) << ((b.bitsRead - 32) & 63)
 	b.bitsRead -= 32
@@ -200,8 +197,7 @@ func (b *bitReaderShifted) fill() {
 		return
 	}
 	if b.off > 4 {
-		v := b.in[b.off-4:]
-		v = v[:4]
+		v := b.in[b.off-4 : b.off]
 		low := (uint32(v[0])) | (uint32(v[1]) << 8) | (uint32(v[2]) << 16) | (uint32(v[3]) << 24)
 		b.value |= uint64(low) << ((b.bitsRead - 32) & 63)
 		b.bitsRead -= 32
diff --git a/vendor/github.com/klauspost/compress/huff0/compress.go b/vendor/github.com/klauspost/compress/huff0/compress.go
index d9223a91ef..cdc94856f2 100644
--- a/vendor/github.com/klauspost/compress/huff0/compress.go
+++ b/vendor/github.com/klauspost/compress/huff0/compress.go
@@ -484,34 +484,35 @@ func (s *Scratch) buildCTable() error {
 	// Different from reference implementation.
 	huffNode0 := s.nodes[0 : huffNodesLen+1]
 
-	for huffNode[nonNullRank].count == 0 {
+	for huffNode[nonNullRank].count() == 0 {
 		nonNullRank--
 	}
 
 	lowS := int16(nonNullRank)
 	nodeRoot := nodeNb + lowS - 1
 	lowN := nodeNb
-	huffNode[nodeNb].count = huffNode[lowS].count + huffNode[lowS-1].count
-	huffNode[lowS].parent, huffNode[lowS-1].parent = uint16(nodeNb), uint16(nodeNb)
+	huffNode[nodeNb].setCount(huffNode[lowS].count() + huffNode[lowS-1].count())
+	huffNode[lowS].setParent(nodeNb)
+	huffNode[lowS-1].setParent(nodeNb)
 	nodeNb++
 	lowS -= 2
 	for n := nodeNb; n <= nodeRoot; n++ {
-		huffNode[n].count = 1 << 30
+		huffNode[n].setCount(1 << 30)
 	}
 	// fake entry, strong barrier
-	huffNode0[0].count = 1 << 31
+	huffNode0[0].setCount(1 << 31)
 
 	// create parents
 	for nodeNb <= nodeRoot {
 		var n1, n2 int16
-		if huffNode0[lowS+1].count < huffNode0[lowN+1].count {
+		if huffNode0[lowS+1].count() < huffNode0[lowN+1].count() {
 			n1 = lowS
 			lowS--
 		} else {
 			n1 = lowN
 			lowN++
 		}
-		if huffNode0[lowS+1].count < huffNode0[lowN+1].count {
+		if huffNode0[lowS+1].count() < huffNode0[lowN+1].count() {
 			n2 = lowS
 			lowS--
 		} else {
@@ -519,18 +520,19 @@ func (s *Scratch) buildCTable() error {
 			lowN++
 		}
 
-		huffNode[nodeNb].count = huffNode0[n1+1].count + huffNode0[n2+1].count
-		huffNode0[n1+1].parent, huffNode0[n2+1].parent = uint16(nodeNb), uint16(nodeNb)
+		huffNode[nodeNb].setCount(huffNode0[n1+1].count() + huffNode0[n2+1].count())
+		huffNode0[n1+1].setParent(nodeNb)
+		huffNode0[n2+1].setParent(nodeNb)
 		nodeNb++
 	}
 
 	// distribute weights (unlimited tree height)
-	huffNode[nodeRoot].nbBits = 0
+	huffNode[nodeRoot].setNbBits(0)
 	for n := nodeRoot - 1; n >= startNode; n-- {
-		huffNode[n].nbBits = huffNode[huffNode[n].parent].nbBits + 1
+		huffNode[n].setNbBits(huffNode[huffNode[n].parent()].nbBits() + 1)
 	}
 	for n := uint16(0); n <= nonNullRank; n++ {
-		huffNode[n].nbBits = huffNode[huffNode[n].parent].nbBits + 1
+		huffNode[n].setNbBits(huffNode[huffNode[n].parent()].nbBits() + 1)
 	}
 	s.actualTableLog = s.setMaxHeight(int(nonNullRank))
 	maxNbBits := s.actualTableLog
@@ -542,7 +544,7 @@ func (s *Scratch) buildCTable() error {
 	var nbPerRank [tableLogMax + 1]uint16
 	var valPerRank [16]uint16
 	for _, v := range huffNode[:nonNullRank+1] {
-		nbPerRank[v.nbBits]++
+		nbPerRank[v.nbBits()]++
 	}
 	// determine stating value per rank
 	{
@@ -557,7 +559,7 @@ func (s *Scratch) buildCTable() error {
 
 	// push nbBits per symbol, symbol order
 	for _, v := range huffNode[:nonNullRank+1] {
-		s.cTable[v.symbol].nBits = v.nbBits
+		s.cTable[v.symbol()].nBits = v.nbBits()
 	}
 
 	// assign value within rank, symbol order
@@ -603,12 +605,12 @@ func (s *Scratch) huffSort() {
 		pos := rank[r].current
 		rank[r].current++
 		prev := nodes[(pos-1)&huffNodesMask]
-		for pos > rank[r].base && c > prev.count {
+		for pos > rank[r].base && c > prev.count() {
 			nodes[pos&huffNodesMask] = prev
 			pos--
 			prev = nodes[(pos-1)&huffNodesMask]
 		}
-		nodes[pos&huffNodesMask] = nodeElt{count: c, symbol: byte(n)}
+		nodes[pos&huffNodesMask] = makeNodeElt(c, byte(n))
 	}
 }
 
@@ -617,7 +619,7 @@ func (s *Scratch) setMaxHeight(lastNonNull int) uint8 {
 	huffNode := s.nodes[1 : huffNodesLen+1]
 	//huffNode = huffNode[: huffNodesLen]
 
-	largestBits := huffNode[lastNonNull].nbBits
+	largestBits := huffNode[lastNonNull].nbBits()
 
 	// early exit : no elt > maxNbBits
 	if largestBits <= maxNbBits {
@@ -627,14 +629,14 @@ func (s *Scratch) setMaxHeight(lastNonNull int) uint8 {
 	baseCost := int(1) << (largestBits - maxNbBits)
 	n := uint32(lastNonNull)
 
-	for huffNode[n].nbBits > maxNbBits {
-		totalCost += baseCost - (1 << (largestBits - huffNode[n].nbBits))
-		huffNode[n].nbBits = maxNbBits
+	for huffNode[n].nbBits() > maxNbBits {
+		totalCost += baseCost - (1 << (largestBits - huffNode[n].nbBits()))
+		huffNode[n].setNbBits(maxNbBits)
 		n--
 	}
 	// n stops at huffNode[n].nbBits <= maxNbBits
 
-	for huffNode[n].nbBits == maxNbBits {
+	for huffNode[n].nbBits() == maxNbBits {
 		n--
 	}
 	// n end at index of smallest symbol using < maxNbBits
@@ -655,10 +657,10 @@ func (s *Scratch) setMaxHeight(lastNonNull int) uint8 {
 		{
 			currentNbBits := maxNbBits
 			for pos := int(n); pos >= 0; pos-- {
-				if huffNode[pos].nbBits >= currentNbBits {
+				if huffNode[pos].nbBits() >= currentNbBits {
 					continue
 				}
-				currentNbBits = huffNode[pos].nbBits // < maxNbBits
+				currentNbBits = huffNode[pos].nbBits() // < maxNbBits
 				rankLast[maxNbBits-currentNbBits] = uint32(pos)
 			}
 		}
@@ -675,8 +677,8 @@ func (s *Scratch) setMaxHeight(lastNonNull int) uint8 {
 				if lowPos == noSymbol {
 					break
 				}
-				highTotal := huffNode[highPos].count
-				lowTotal := 2 * huffNode[lowPos].count
+				highTotal := huffNode[highPos].count()
+				lowTotal := 2 * huffNode[lowPos].count()
 				if highTotal <= lowTotal {
 					break
 				}
@@ -692,13 +694,14 @@ func (s *Scratch) setMaxHeight(lastNonNull int) uint8 {
 				// this rank is no longer empty
 				rankLast[nBitsToDecrease-1] = rankLast[nBitsToDecrease]
 			}
-			huffNode[rankLast[nBitsToDecrease]].nbBits++
+			huffNode[rankLast[nBitsToDecrease]].setNbBits(1 +
+				huffNode[rankLast[nBitsToDecrease]].nbBits())
 			if rankLast[nBitsToDecrease] == 0 {
 				/* special case, reached largest symbol */
 				rankLast[nBitsToDecrease] = noSymbol
 			} else {
 				rankLast[nBitsToDecrease]--
-				if huffNode[rankLast[nBitsToDecrease]].nbBits != maxNbBits-nBitsToDecrease {
+				if huffNode[rankLast[nBitsToDecrease]].nbBits() != maxNbBits-nBitsToDecrease {
 					rankLast[nBitsToDecrease] = noSymbol /* this rank is now empty */
 				}
 			}
@@ -706,15 +709,15 @@ func (s *Scratch) setMaxHeight(lastNonNull int) uint8 {
 
 		for totalCost < 0 { /* Sometimes, cost correction overshoot */
 			if rankLast[1] == noSymbol { /* special case : no rank 1 symbol (using maxNbBits-1); let's create one from largest rank 0 (using maxNbBits) */
-				for huffNode[n].nbBits == maxNbBits {
+				for huffNode[n].nbBits() == maxNbBits {
 					n--
 				}
-				huffNode[n+1].nbBits--
+				huffNode[n+1].setNbBits(huffNode[n+1].nbBits() - 1)
 				rankLast[1] = n + 1
 				totalCost++
 				continue
 			}
-			huffNode[rankLast[1]+1].nbBits--
+			huffNode[rankLast[1]+1].setNbBits(huffNode[rankLast[1]+1].nbBits() - 1)
 			rankLast[1]++
 			totalCost++
 		}
@@ -722,9 +725,26 @@ func (s *Scratch) setMaxHeight(lastNonNull int) uint8 {
 	return maxNbBits
 }
 
-type nodeElt struct {
-	count  uint32
-	parent uint16
-	symbol byte
-	nbBits uint8
+// A nodeElt is the fields
+//
+//	count  uint32
+//	parent uint16
+//	symbol byte
+//	nbBits uint8
+//
+// in some order, all squashed into an integer so that the compiler
+// always loads and stores entire nodeElts instead of separate fields.
+type nodeElt uint64
+
+func makeNodeElt(count uint32, symbol byte) nodeElt {
+	return nodeElt(count) | nodeElt(symbol)<<48
 }
+
+func (e *nodeElt) count() uint32  { return uint32(*e) }
+func (e *nodeElt) parent() uint16 { return uint16(*e >> 32) }
+func (e *nodeElt) symbol() byte   { return byte(*e >> 48) }
+func (e *nodeElt) nbBits() uint8  { return uint8(*e >> 56) }
+
+func (e *nodeElt) setCount(c uint32) { *e = (*e)&0xffffffff00000000 | nodeElt(c) }
+func (e *nodeElt) setParent(p int16) { *e = (*e)&0xffff0000ffffffff | nodeElt(uint16(p))<<32 }
+func (e *nodeElt) setNbBits(n uint8) { *e = (*e)&0x00ffffffffffffff | nodeElt(n)<<56 }
diff --git a/vendor/github.com/klauspost/compress/huff0/decompress_amd64.s b/vendor/github.com/klauspost/compress/huff0/decompress_amd64.s
index 8d2187a2ce..c4c7ab2d1f 100644
--- a/vendor/github.com/klauspost/compress/huff0/decompress_amd64.s
+++ b/vendor/github.com/klauspost/compress/huff0/decompress_amd64.s
@@ -4,360 +4,349 @@
 
 // func decompress4x_main_loop_amd64(ctx *decompress4xContext)
 TEXT ·decompress4x_main_loop_amd64(SB), $0-8
-	XORQ DX, DX
-
 	// Preload values
 	MOVQ    ctx+0(FP), AX
 	MOVBQZX 8(AX), DI
-	MOVQ    16(AX), SI
-	MOVQ    48(AX), BX
-	MOVQ    24(AX), R9
-	MOVQ    32(AX), R10
-	MOVQ    (AX), R11
+	MOVQ    16(AX), BX
+	MOVQ    48(AX), SI
+	MOVQ    24(AX), R8
+	MOVQ    32(AX), R9
+	MOVQ    (AX), R10
 
 	// Main loop
 main_loop:
-	MOVQ  SI, R8
-	CMPQ  R8, BX
+	XORL  DX, DX
+	CMPQ  BX, SI
 	SETGE DL
 
 	// br0.fillFast32()
-	MOVQ    32(R11), R12
-	MOVBQZX 40(R11), R13
-	CMPQ    R13, $0x20
+	MOVQ    32(R10), R11
+	MOVBQZX 40(R10), R12
+	CMPQ    R12, $0x20
 	JBE     skip_fill0
-	MOVQ    24(R11), AX
-	SUBQ    $0x20, R13
+	MOVQ    24(R10), AX
+	SUBQ    $0x20, R12
 	SUBQ    $0x04, AX
-	MOVQ    (R11), R14
+	MOVQ    (R10), R13
 
 	// b.value |= uint64(low) << (b.bitsRead & 63)
-	MOVL (AX)(R14*1), R14
-	MOVQ R13, CX
-	SHLQ CL, R14
-	MOVQ AX, 24(R11)
-	ORQ  R14, R12
+	MOVL (AX)(R13*1), R13
+	MOVQ R12, CX
+	SHLQ CL, R13
+	MOVQ AX, 24(R10)
+	ORQ  R13, R11
 
-	// exhausted = exhausted || (br0.off < 4)
-	CMPQ  AX, $0x04
-	SETLT AL
-	ORB   AL, DL
+	// exhausted += (br0.off < 4)
+	CMPQ AX, $0x04
+	ADCB $+0, DL
 
 skip_fill0:
 	// val0 := br0.peekTopBits(peekBits)
-	MOVQ R12, R14
+	MOVQ R11, R13
 	MOVQ DI, CX
-	SHRQ CL, R14
+	SHRQ CL, R13
 
 	// v0 := table[val0&mask]
-	MOVW (R10)(R14*2), CX
+	MOVW (R9)(R13*2), CX
 
 	// br0.advance(uint8(v0.entry)
 	MOVB CH, AL
-	SHLQ CL, R12
-	ADDB CL, R13
+	SHLQ CL, R11
+	ADDB CL, R12
 
 	// val1 := br0.peekTopBits(peekBits)
 	MOVQ DI, CX
-	MOVQ R12, R14
-	SHRQ CL, R14
+	MOVQ R11, R13
+	SHRQ CL, R13
 
 	// v1 := table[val1&mask]
-	MOVW (R10)(R14*2), CX
+	MOVW (R9)(R13*2), CX
 
 	// br0.advance(uint8(v1.entry))
 	MOVB CH, AH
-	SHLQ CL, R12
-	ADDB CL, R13
+	SHLQ CL, R11
+	ADDB CL, R12
 
 	// these two writes get coalesced
 	// out[id * dstEvery + 0] = uint8(v0.entry >> 8)
 	// out[id * dstEvery + 1] = uint8(v1.entry >> 8)
-	MOVW AX, (R8)
+	MOVW AX, (BX)
 
 	// update the bitreader structure
-	MOVQ R12, 32(R11)
-	MOVB R13, 40(R11)
-	ADDQ R9, R8
+	MOVQ R11, 32(R10)
+	MOVB R12, 40(R10)
 
 	// br1.fillFast32()
-	MOVQ    80(R11), R12
-	MOVBQZX 88(R11), R13
-	CMPQ    R13, $0x20
+	MOVQ    80(R10), R11
+	MOVBQZX 88(R10), R12
+	CMPQ    R12, $0x20
 	JBE     skip_fill1
-	MOVQ    72(R11), AX
-	SUBQ    $0x20, R13
+	MOVQ    72(R10), AX
+	SUBQ    $0x20, R12
 	SUBQ    $0x04, AX
-	MOVQ    48(R11), R14
+	MOVQ    48(R10), R13
 
 	// b.value |= uint64(low) << (b.bitsRead & 63)
-	MOVL (AX)(R14*1), R14
-	MOVQ R13, CX
-	SHLQ CL, R14
-	MOVQ AX, 72(R11)
-	ORQ  R14, R12
+	MOVL (AX)(R13*1), R13
+	MOVQ R12, CX
+	SHLQ CL, R13
+	MOVQ AX, 72(R10)
+	ORQ  R13, R11
 
-	// exhausted = exhausted || (br1.off < 4)
-	CMPQ  AX, $0x04
-	SETLT AL
-	ORB   AL, DL
+	// exhausted += (br1.off < 4)
+	CMPQ AX, $0x04
+	ADCB $+0, DL
 
 skip_fill1:
 	// val0 := br1.peekTopBits(peekBits)
-	MOVQ R12, R14
+	MOVQ R11, R13
 	MOVQ DI, CX
-	SHRQ CL, R14
+	SHRQ CL, R13
 
 	// v0 := table[val0&mask]
-	MOVW (R10)(R14*2), CX
+	MOVW (R9)(R13*2), CX
 
 	// br1.advance(uint8(v0.entry)
 	MOVB CH, AL
-	SHLQ CL, R12
-	ADDB CL, R13
+	SHLQ CL, R11
+	ADDB CL, R12
 
 	// val1 := br1.peekTopBits(peekBits)
 	MOVQ DI, CX
-	MOVQ R12, R14
-	SHRQ CL, R14
+	MOVQ R11, R13
+	SHRQ CL, R13
 
 	// v1 := table[val1&mask]
-	MOVW (R10)(R14*2), CX
+	MOVW (R9)(R13*2), CX
 
 	// br1.advance(uint8(v1.entry))
 	MOVB CH, AH
-	SHLQ CL, R12
-	ADDB CL, R13
+	SHLQ CL, R11
+	ADDB CL, R12
 
 	// these two writes get coalesced
 	// out[id * dstEvery + 0] = uint8(v0.entry >> 8)
 	// out[id * dstEvery + 1] = uint8(v1.entry >> 8)
-	MOVW AX, (R8)
+	MOVW AX, (BX)(R8*1)
 
 	// update the bitreader structure
-	MOVQ R12, 80(R11)
-	MOVB R13, 88(R11)
-	ADDQ R9, R8
+	MOVQ R11, 80(R10)
+	MOVB R12, 88(R10)
 
 	// br2.fillFast32()
-	MOVQ    128(R11), R12
-	MOVBQZX 136(R11), R13
-	CMPQ    R13, $0x20
+	MOVQ    128(R10), R11
+	MOVBQZX 136(R10), R12
+	CMPQ    R12, $0x20
 	JBE     skip_fill2
-	MOVQ    120(R11), AX
-	SUBQ    $0x20, R13
+	MOVQ    120(R10), AX
+	SUBQ    $0x20, R12
 	SUBQ    $0x04, AX
-	MOVQ    96(R11), R14
+	MOVQ    96(R10), R13
 
 	// b.value |= uint64(low) << (b.bitsRead & 63)
-	MOVL (AX)(R14*1), R14
-	MOVQ R13, CX
-	SHLQ CL, R14
-	MOVQ AX, 120(R11)
-	ORQ  R14, R12
+	MOVL (AX)(R13*1), R13
+	MOVQ R12, CX
+	SHLQ CL, R13
+	MOVQ AX, 120(R10)
+	ORQ  R13, R11
 
-	// exhausted = exhausted || (br2.off < 4)
-	CMPQ  AX, $0x04
-	SETLT AL
-	ORB   AL, DL
+	// exhausted += (br2.off < 4)
+	CMPQ AX, $0x04
+	ADCB $+0, DL
 
 skip_fill2:
 	// val0 := br2.peekTopBits(peekBits)
-	MOVQ R12, R14
+	MOVQ R11, R13
 	MOVQ DI, CX
-	SHRQ CL, R14
+	SHRQ CL, R13
 
 	// v0 := table[val0&mask]
-	MOVW (R10)(R14*2), CX
+	MOVW (R9)(R13*2), CX
 
 	// br2.advance(uint8(v0.entry)
 	MOVB CH, AL
-	SHLQ CL, R12
-	ADDB CL, R13
+	SHLQ CL, R11
+	ADDB CL, R12
 
 	// val1 := br2.peekTopBits(peekBits)
 	MOVQ DI, CX
-	MOVQ R12, R14
-	SHRQ CL, R14
+	MOVQ R11, R13
+	SHRQ CL, R13
 
 	// v1 := table[val1&mask]
-	MOVW (R10)(R14*2), CX
+	MOVW (R9)(R13*2), CX
 
 	// br2.advance(uint8(v1.entry))
 	MOVB CH, AH
-	SHLQ CL, R12
-	ADDB CL, R13
+	SHLQ CL, R11
+	ADDB CL, R12
 
 	// these two writes get coalesced
 	// out[id * dstEvery + 0] = uint8(v0.entry >> 8)
 	// out[id * dstEvery + 1] = uint8(v1.entry >> 8)
-	MOVW AX, (R8)
+	MOVW AX, (BX)(R8*2)
 
 	// update the bitreader structure
-	MOVQ R12, 128(R11)
-	MOVB R13, 136(R11)
-	ADDQ R9, R8
+	MOVQ R11, 128(R10)
+	MOVB R12, 136(R10)
 
 	// br3.fillFast32()
-	MOVQ    176(R11), R12
-	MOVBQZX 184(R11), R13
-	CMPQ    R13, $0x20
+	MOVQ    176(R10), R11
+	MOVBQZX 184(R10), R12
+	CMPQ    R12, $0x20
 	JBE     skip_fill3
-	MOVQ    168(R11), AX
-	SUBQ    $0x20, R13
+	MOVQ    168(R10), AX
+	SUBQ    $0x20, R12
 	SUBQ    $0x04, AX
-	MOVQ    144(R11), R14
+	MOVQ    144(R10), R13
 
 	// b.value |= uint64(low) << (b.bitsRead & 63)
-	MOVL (AX)(R14*1), R14
-	MOVQ R13, CX
-	SHLQ CL, R14
-	MOVQ AX, 168(R11)
-	ORQ  R14, R12
+	MOVL (AX)(R13*1), R13
+	MOVQ R12, CX
+	SHLQ CL, R13
+	MOVQ AX, 168(R10)
+	ORQ  R13, R11
 
-	// exhausted = exhausted || (br3.off < 4)
-	CMPQ  AX, $0x04
-	SETLT AL
-	ORB   AL, DL
+	// exhausted += (br3.off < 4)
+	CMPQ AX, $0x04
+	ADCB $+0, DL
 
 skip_fill3:
 	// val0 := br3.peekTopBits(peekBits)
-	MOVQ R12, R14
+	MOVQ R11, R13
 	MOVQ DI, CX
-	SHRQ CL, R14
+	SHRQ CL, R13
 
 	// v0 := table[val0&mask]
-	MOVW (R10)(R14*2), CX
+	MOVW (R9)(R13*2), CX
 
 	// br3.advance(uint8(v0.entry)
 	MOVB CH, AL
-	SHLQ CL, R12
-	ADDB CL, R13
+	SHLQ CL, R11
+	ADDB CL, R12
 
 	// val1 := br3.peekTopBits(peekBits)
 	MOVQ DI, CX
-	MOVQ R12, R14
-	SHRQ CL, R14
+	MOVQ R11, R13
+	SHRQ CL, R13
 
 	// v1 := table[val1&mask]
-	MOVW (R10)(R14*2), CX
+	MOVW (R9)(R13*2), CX
 
 	// br3.advance(uint8(v1.entry))
 	MOVB CH, AH
-	SHLQ CL, R12
-	ADDB CL, R13
+	SHLQ CL, R11
+	ADDB CL, R12
 
 	// these two writes get coalesced
 	// out[id * dstEvery + 0] = uint8(v0.entry >> 8)
 	// out[id * dstEvery + 1] = uint8(v1.entry >> 8)
-	MOVW AX, (R8)
+	LEAQ (R8)(R8*2), CX
+	MOVW AX, (BX)(CX*1)
 
 	// update the bitreader structure
-	MOVQ  R12, 176(R11)
-	MOVB  R13, 184(R11)
-	ADDQ  $0x02, SI
+	MOVQ  R11, 176(R10)
+	MOVB  R12, 184(R10)
+	ADDQ  $0x02, BX
 	TESTB DL, DL
 	JZ    main_loop
 	MOVQ  ctx+0(FP), AX
-	SUBQ  16(AX), SI
-	SHLQ  $0x02, SI
-	MOVQ  SI, 40(AX)
+	SUBQ  16(AX), BX
+	SHLQ  $0x02, BX
+	MOVQ  BX, 40(AX)
 	RET
 
 // func decompress4x_8b_main_loop_amd64(ctx *decompress4xContext)
 TEXT ·decompress4x_8b_main_loop_amd64(SB), $0-8
-	XORQ DX, DX
-
 	// Preload values
 	MOVQ    ctx+0(FP), CX
 	MOVBQZX 8(CX), DI
 	MOVQ    16(CX), BX
 	MOVQ    48(CX), SI
-	MOVQ    24(CX), R9
-	MOVQ    32(CX), R10
-	MOVQ    (CX), R11
+	MOVQ    24(CX), R8
+	MOVQ    32(CX), R9
+	MOVQ    (CX), R10
 
 	// Main loop
 main_loop:
-	MOVQ  BX, R8
-	CMPQ  R8, SI
+	XORL  DX, DX
+	CMPQ  BX, SI
 	SETGE DL
 
 	// br0.fillFast32()
-	MOVQ    32(R11), R12
-	MOVBQZX 40(R11), R13
-	CMPQ    R13, $0x20
+	MOVQ    32(R10), R11
+	MOVBQZX 40(R10), R12
+	CMPQ    R12, $0x20
 	JBE     skip_fill0
-	MOVQ    24(R11), R14
-	SUBQ    $0x20, R13
-	SUBQ    $0x04, R14
-	MOVQ    (R11), R15
+	MOVQ    24(R10), R13
+	SUBQ    $0x20, R12
+	SUBQ    $0x04, R13
+	MOVQ    (R10), R14
 
 	// b.value |= uint64(low) << (b.bitsRead & 63)
-	MOVL (R14)(R15*1), R15
-	MOVQ R13, CX
-	SHLQ CL, R15
-	MOVQ R14, 24(R11)
-	ORQ  R15, R12
+	MOVL (R13)(R14*1), R14
+	MOVQ R12, CX
+	SHLQ CL, R14
+	MOVQ R13, 24(R10)
+	ORQ  R14, R11
 
-	// exhausted = exhausted || (br0.off < 4)
-	CMPQ  R14, $0x04
-	SETLT AL
-	ORB   AL, DL
+	// exhausted += (br0.off < 4)
+	CMPQ R13, $0x04
+	ADCB $+0, DL
 
 skip_fill0:
 	// val0 := br0.peekTopBits(peekBits)
-	MOVQ R12, R14
+	MOVQ R11, R13
 	MOVQ DI, CX
-	SHRQ CL, R14
+	SHRQ CL, R13
 
 	// v0 := table[val0&mask]
-	MOVW (R10)(R14*2), CX
+	MOVW (R9)(R13*2), CX
 
 	// br0.advance(uint8(v0.entry)
 	MOVB CH, AL
-	SHLQ CL, R12
-	ADDB CL, R13
+	SHLQ CL, R11
+	ADDB CL, R12
 
 	// val1 := br0.peekTopBits(peekBits)
-	MOVQ R12, R14
+	MOVQ R11, R13
 	MOVQ DI, CX
-	SHRQ CL, R14
+	SHRQ CL, R13
 
 	// v1 := table[val0&mask]
-	MOVW (R10)(R14*2), CX
+	MOVW (R9)(R13*2), CX
 
 	// br0.advance(uint8(v1.entry)
 	MOVB   CH, AH
-	SHLQ   CL, R12
-	ADDB   CL, R13
+	SHLQ   CL, R11
+	ADDB   CL, R12
 	BSWAPL AX
 
 	// val2 := br0.peekTopBits(peekBits)
-	MOVQ R12, R14
+	MOVQ R11, R13
 	MOVQ DI, CX
-	SHRQ CL, R14
+	SHRQ CL, R13
 
 	// v2 := table[val0&mask]
-	MOVW (R10)(R14*2), CX
+	MOVW (R9)(R13*2), CX
 
 	// br0.advance(uint8(v2.entry)
 	MOVB CH, AH
-	SHLQ CL, R12
-	ADDB CL, R13
+	SHLQ CL, R11
+	ADDB CL, R12
 
 	// val3 := br0.peekTopBits(peekBits)
-	MOVQ R12, R14
+	MOVQ R11, R13
 	MOVQ DI, CX
-	SHRQ CL, R14
+	SHRQ CL, R13
 
 	// v3 := table[val0&mask]
-	MOVW (R10)(R14*2), CX
+	MOVW (R9)(R13*2), CX
 
 	// br0.advance(uint8(v3.entry)
 	MOVB   CH, AL
-	SHLQ   CL, R12
-	ADDB   CL, R13
+	SHLQ   CL, R11
+	ADDB   CL, R12
 	BSWAPL AX
 
 	// these four writes get coalesced
@@ -365,88 +354,86 @@ skip_fill0:
 	// out[id * dstEvery + 1] = uint8(v1.entry >> 8)
 	// out[id * dstEvery + 3] = uint8(v2.entry >> 8)
 	// out[id * dstEvery + 4] = uint8(v3.entry >> 8)
-	MOVL AX, (R8)
+	MOVL AX, (BX)
 
 	// update the bitreader structure
-	MOVQ R12, 32(R11)
-	MOVB R13, 40(R11)
-	ADDQ R9, R8
+	MOVQ R11, 32(R10)
+	MOVB R12, 40(R10)
 
 	// br1.fillFast32()
-	MOVQ    80(R11), R12
-	MOVBQZX 88(R11), R13
-	CMPQ    R13, $0x20
+	MOVQ    80(R10), R11
+	MOVBQZX 88(R10), R12
+	CMPQ    R12, $0x20
 	JBE     skip_fill1
-	MOVQ    72(R11), R14
-	SUBQ    $0x20, R13
-	SUBQ    $0x04, R14
-	MOVQ    48(R11), R15
+	MOVQ    72(R10), R13
+	SUBQ    $0x20, R12
+	SUBQ    $0x04, R13
+	MOVQ    48(R10), R14
 
 	// b.value |= uint64(low) << (b.bitsRead & 63)
-	MOVL (R14)(R15*1), R15
-	MOVQ R13, CX
-	SHLQ CL, R15
-	MOVQ R14, 72(R11)
-	ORQ  R15, R12
+	MOVL (R13)(R14*1), R14
+	MOVQ R12, CX
+	SHLQ CL, R14
+	MOVQ R13, 72(R10)
+	ORQ  R14, R11
 
-	// exhausted = exhausted || (br1.off < 4)
-	CMPQ  R14, $0x04
-	SETLT AL
-	ORB   AL, DL
+	// exhausted += (br1.off < 4)
+	CMPQ R13, $0x04
+	ADCB $+0, DL
 
 skip_fill1:
 	// val0 := br1.peekTopBits(peekBits)
-	MOVQ R12, R14
+	MOVQ R11, R13
 	MOVQ DI, CX
-	SHRQ CL, R14
+	SHRQ CL, R13
 
 	// v0 := table[val0&mask]
-	MOVW (R10)(R14*2), CX
+	MOVW (R9)(R13*2), CX
 
 	// br1.advance(uint8(v0.entry)
 	MOVB CH, AL
-	SHLQ CL, R12
-	ADDB CL, R13
+	SHLQ CL, R11
+	ADDB CL, R12
 
 	// val1 := br1.peekTopBits(peekBits)
-	MOVQ R12, R14
+	MOVQ R11, R13
 	MOVQ DI, CX
-	SHRQ CL, R14
+	SHRQ CL, R13
 
 	// v1 := table[val0&mask]
-	MOVW (R10)(R14*2), CX
+	MOVW (R9)(R13*2), CX
 
 	// br1.advance(uint8(v1.entry)
 	MOVB   CH, AH
-	SHLQ   CL, R12
-	ADDB   CL, R13
+	SHLQ   CL, R11
+	ADDB   CL, R12
 	BSWAPL AX
 
 	// val2 := br1.peekTopBits(peekBits)
-	MOVQ R12, R14
+	MOVQ R11, R13
 	MOVQ DI, CX
-	SHRQ CL, R14
+	SHRQ CL, R13
 
 	// v2 := table[val0&mask]
-	MOVW (R10)(R14*2), CX
+	MOVW (R9)(R13*2), CX
 
 	// br1.advance(uint8(v2.entry)
 	MOVB CH, AH
-	SHLQ CL, R12
-	ADDB CL, R13
+	SHLQ CL, R11
+	ADDB CL, R12
 
 	// val3 := br1.peekTopBits(peekBits)
-	MOVQ R12, R14
+	MOVQ R11, R13
 	MOVQ DI, CX
-	SHRQ CL, R14
+	SHRQ CL, R13
 
 	// v3 := table[val0&mask]
-	MOVW (R10)(R14*2), CX
+	MOVW (R9)(R13*2), CX
 
 	// br1.advance(uint8(v3.entry)
 	MOVB   CH, AL
-	SHLQ   CL, R12
-	ADDB   CL, R13
+	SHLQ   CL, R11
+	ADDB   CL, R12
 	BSWAPL AX
 
 	// these four writes get coalesced
@@ -454,88 +441,86 @@ skip_fill1:
 	// out[id * dstEvery + 1] = uint8(v1.entry >> 8)
 	// out[id * dstEvery + 3] = uint8(v2.entry >> 8)
 	// out[id * dstEvery + 4] = uint8(v3.entry >> 8)
-	MOVL AX, (R8)
+	MOVL AX, (BX)(R8*1)
 
 	// update the bitreader structure
-	MOVQ R12, 80(R11)
-	MOVB R13, 88(R11)
-	ADDQ R9, R8
+	MOVQ R11, 80(R10)
+	MOVB R12, 88(R10)
 
 	// br2.fillFast32()
-	MOVQ    128(R11), R12
-	MOVBQZX 136(R11), R13
-	CMPQ    R13, $0x20
+	MOVQ    128(R10), R11
+	MOVBQZX 136(R10), R12
+	CMPQ    R12, $0x20
 	JBE     skip_fill2
-	MOVQ    120(R11), R14
-	SUBQ    $0x20, R13
-	SUBQ    $0x04, R14
-	MOVQ    96(R11), R15
+	MOVQ    120(R10), R13
+	SUBQ    $0x20, R12
+	SUBQ    $0x04, R13
+	MOVQ    96(R10), R14
 
 	// b.value |= uint64(low) << (b.bitsRead & 63)
-	MOVL (R14)(R15*1), R15
-	MOVQ R13, CX
-	SHLQ CL, R15
-	MOVQ R14, 120(R11)
-	ORQ  R15, R12
+	MOVL (R13)(R14*1), R14
+	MOVQ R12, CX
+	SHLQ CL, R14
+	MOVQ R13, 120(R10)
+	ORQ  R14, R11
 
-	// exhausted = exhausted || (br2.off < 4)
-	CMPQ  R14, $0x04
-	SETLT AL
-	ORB   AL, DL
+	// exhausted += (br2.off < 4)
+	CMPQ R13, $0x04
+	ADCB $+0, DL
 
 skip_fill2:
 	// val0 := br2.peekTopBits(peekBits)
-	MOVQ R12, R14
+	MOVQ R11, R13
 	MOVQ DI, CX
-	SHRQ CL, R14
+	SHRQ CL, R13
 
 	// v0 := table[val0&mask]
-	MOVW (R10)(R14*2), CX
+	MOVW (R9)(R13*2), CX
 
 	// br2.advance(uint8(v0.entry)
 	MOVB CH, AL
-	SHLQ CL, R12
-	ADDB CL, R13
+	SHLQ CL, R11
+	ADDB CL, R12
 
 	// val1 := br2.peekTopBits(peekBits)
-	MOVQ R12, R14
+	MOVQ R11, R13
 	MOVQ DI, CX
-	SHRQ CL, R14
+	SHRQ CL, R13
 
 	// v1 := table[val0&mask]
-	MOVW (R10)(R14*2), CX
+	MOVW (R9)(R13*2), CX
 
 	// br2.advance(uint8(v1.entry)
 	MOVB   CH, AH
-	SHLQ   CL, R12
-	ADDB   CL, R13
+	SHLQ   CL, R11
+	ADDB   CL, R12
 	BSWAPL AX
 
 	// val2 := br2.peekTopBits(peekBits)
-	MOVQ R12, R14
+	MOVQ R11, R13
 	MOVQ DI, CX
-	SHRQ CL, R14
+	SHRQ CL, R13
 
 	// v2 := table[val0&mask]
-	MOVW (R10)(R14*2), CX
+	MOVW (R9)(R13*2), CX
 
 	// br2.advance(uint8(v2.entry)
 	MOVB CH, AH
-	SHLQ CL, R12
-	ADDB CL, R13
+	SHLQ CL, R11
+	ADDB CL, R12
 
 	// val3 := br2.peekTopBits(peekBits)
-	MOVQ R12, R14
+	MOVQ R11, R13
 	MOVQ DI, CX
-	SHRQ CL, R14
+	SHRQ CL, R13
 
 	// v3 := table[val0&mask]
-	MOVW (R10)(R14*2), CX
+	MOVW (R9)(R13*2), CX
 
 	// br2.advance(uint8(v3.entry)
 	MOVB   CH, AL
-	SHLQ   CL, R12
-	ADDB   CL, R13
+	SHLQ   CL, R11
+	ADDB   CL, R12
 	BSWAPL AX
 
 	// these four writes get coalesced
@@ -543,88 +528,86 @@ skip_fill2:
 	// out[id * dstEvery + 1] = uint8(v1.entry >> 8)
 	// out[id * dstEvery + 3] = uint8(v2.entry >> 8)
 	// out[id * dstEvery + 4] = uint8(v3.entry >> 8)
-	MOVL AX, (R8)
+	MOVL AX, (BX)(R8*2)
 
 	// update the bitreader structure
-	MOVQ R12, 128(R11)
-	MOVB R13, 136(R11)
-	ADDQ R9, R8
+	MOVQ R11, 128(R10)
+	MOVB R12, 136(R10)
 
 	// br3.fillFast32()
-	MOVQ    176(R11), R12
-	MOVBQZX 184(R11), R13
-	CMPQ    R13, $0x20
+	MOVQ    176(R10), R11
+	MOVBQZX 184(R10), R12
+	CMPQ    R12, $0x20
 	JBE     skip_fill3
-	MOVQ    168(R11), R14
-	SUBQ    $0x20, R13
-	SUBQ    $0x04, R14
-	MOVQ    144(R11), R15
+	MOVQ    168(R10), R13
+	SUBQ    $0x20, R12
+	SUBQ    $0x04, R13
+	MOVQ    144(R10), R14
 
 	// b.value |= uint64(low) << (b.bitsRead & 63)
-	MOVL (R14)(R15*1), R15
-	MOVQ R13, CX
-	SHLQ CL, R15
-	MOVQ R14, 168(R11)
-	ORQ  R15, R12
+	MOVL (R13)(R14*1), R14
+	MOVQ R12, CX
+	SHLQ CL, R14
+	MOVQ R13, 168(R10)
+	ORQ  R14, R11
 
-	// exhausted = exhausted || (br3.off < 4)
-	CMPQ  R14, $0x04
-	SETLT AL
-	ORB   AL, DL
+	// exhausted += (br3.off < 4)
+	CMPQ R13, $0x04
+	ADCB $+0, DL
 
 skip_fill3:
 	// val0 := br3.peekTopBits(peekBits)
-	MOVQ R12, R14
+	MOVQ R11, R13
 	MOVQ DI, CX
-	SHRQ CL, R14
+	SHRQ CL, R13
 
 	// v0 := table[val0&mask]
-	MOVW (R10)(R14*2), CX
+	MOVW (R9)(R13*2), CX
 
 	// br3.advance(uint8(v0.entry)
 	MOVB CH, AL
-	SHLQ CL, R12
-	ADDB CL, R13
+	SHLQ CL, R11
+	ADDB CL, R12
 
 	// val1 := br3.peekTopBits(peekBits)
-	MOVQ R12, R14
+	MOVQ R11, R13
 	MOVQ DI, CX
-	SHRQ CL, R14
+	SHRQ CL, R13
 
 	// v1 := table[val0&mask]
-	MOVW (R10)(R14*2), CX
+	MOVW (R9)(R13*2), CX
 
 	// br3.advance(uint8(v1.entry)
 	MOVB   CH, AH
-	SHLQ   CL, R12
-	ADDB   CL, R13
+	SHLQ   CL, R11
+	ADDB   CL, R12
 	BSWAPL AX
 
 	// val2 := br3.peekTopBits(peekBits)
-	MOVQ R12, R14
+	MOVQ R11, R13
 	MOVQ DI, CX
-	SHRQ CL, R14
+	SHRQ CL, R13
 
 	// v2 := table[val0&mask]
-	MOVW (R10)(R14*2), CX
+	MOVW (R9)(R13*2), CX
 
 	// br3.advance(uint8(v2.entry)
 	MOVB CH, AH
-	SHLQ CL, R12
-	ADDB CL, R13
+	SHLQ CL, R11
+	ADDB CL, R12
 
 	// val3 := br3.peekTopBits(peekBits)
-	MOVQ R12, R14
+	MOVQ R11, R13
 	MOVQ DI, CX
-	SHRQ CL, R14
+	SHRQ CL, R13
 
 	// v3 := table[val0&mask]
-	MOVW (R10)(R14*2), CX
+	MOVW (R9)(R13*2), CX
 
 	// br3.advance(uint8(v3.entry)
 	MOVB   CH, AL
-	SHLQ   CL, R12
-	ADDB   CL, R13
+	SHLQ   CL, R11
+	ADDB   CL, R12
 	BSWAPL AX
 
 	// these four writes get coalesced
@@ -632,11 +615,12 @@ skip_fill3:
 	// out[id * dstEvery + 1] = uint8(v1.entry >> 8)
 	// out[id * dstEvery + 3] = uint8(v2.entry >> 8)
 	// out[id * dstEvery + 4] = uint8(v3.entry >> 8)
-	MOVL AX, (R8)
+	LEAQ (R8)(R8*2), CX
+	MOVL AX, (BX)(CX*1)
 
 	// update the bitreader structure
-	MOVQ  R12, 176(R11)
-	MOVB  R13, 184(R11)
+	MOVQ  R11, 176(R10)
+	MOVB  R12, 184(R10)
 	ADDQ  $0x04, BX
 	TESTB DL, DL
 	JZ    main_loop
@@ -652,7 +636,7 @@ TEXT ·decompress1x_main_loop_amd64(SB), $0-8
 	MOVQ    16(CX), DX
 	MOVQ    24(CX), BX
 	CMPQ    BX, $0x04
-	JB      error_max_decoded_size_exeeded
+	JB      error_max_decoded_size_exceeded
 	LEAQ    (DX)(BX*1), BX
 	MOVQ    (CX), SI
 	MOVQ    (SI), R8
@@ -667,7 +651,7 @@ main_loop:
 	// Check if we have room for 4 bytes in the output buffer
 	LEAQ 4(DX), CX
 	CMPQ CX, BX
-	JGE  error_max_decoded_size_exeeded
+	JGE  error_max_decoded_size_exceeded
 
 	// Decode 4 values
 	CMPQ R11, $0x20
@@ -744,7 +728,7 @@ loop_condition:
 	RET
 
 	// Report error
-error_max_decoded_size_exeeded:
+error_max_decoded_size_exceeded:
 	MOVQ ctx+0(FP), AX
 	MOVQ $-1, CX
 	MOVQ CX, 40(AX)
@@ -757,7 +741,7 @@ TEXT ·decompress1x_main_loop_bmi2(SB), $0-8
 	MOVQ    16(CX), DX
 	MOVQ    24(CX), BX
 	CMPQ    BX, $0x04
-	JB      error_max_decoded_size_exeeded
+	JB      error_max_decoded_size_exceeded
 	LEAQ    (DX)(BX*1), BX
 	MOVQ    (CX), SI
 	MOVQ    (SI), R8
@@ -772,7 +756,7 @@ main_loop:
 	// Check if we have room for 4 bytes in the output buffer
 	LEAQ 4(DX), CX
 	CMPQ CX, BX
-	JGE  error_max_decoded_size_exeeded
+	JGE  error_max_decoded_size_exceeded
 
 	// Decode 4 values
 	CMPQ  R11, $0x20
@@ -839,7 +823,7 @@ loop_condition:
 	RET
 
 	// Report error
-error_max_decoded_size_exeeded:
+error_max_decoded_size_exceeded:
 	MOVQ ctx+0(FP), AX
 	MOVQ $-1, CX
 	MOVQ CX, 40(AX)
diff --git a/vendor/github.com/klauspost/compress/zstd/blockdec.go b/vendor/github.com/klauspost/compress/zstd/blockdec.go
index 6b9929ddf5..2445bb4fe5 100644
--- a/vendor/github.com/klauspost/compress/zstd/blockdec.go
+++ b/vendor/github.com/klauspost/compress/zstd/blockdec.go
@@ -192,16 +192,14 @@ func (b *blockDec) reset(br byteBuffer, windowSize uint64) error {
 	}
 
 	// Read block data.
-	if cap(b.dataStorage) < cSize {
+	if _, ok := br.(*byteBuf); !ok && cap(b.dataStorage) < cSize {
+		// byteBuf doesn't need a destination buffer.
 		if b.lowMem || cSize > maxCompressedBlockSize {
 			b.dataStorage = make([]byte, 0, cSize+compressedBlockOverAlloc)
 		} else {
 			b.dataStorage = make([]byte, 0, maxCompressedBlockSizeAlloc)
 		}
 	}
-	if cap(b.dst) <= maxSize {
-		b.dst = make([]byte, 0, maxSize+1)
-	}
 	b.data, err = br.readBig(cSize, b.dataStorage)
 	if err != nil {
 		if debugDecoder {
@@ -210,6 +208,9 @@ func (b *blockDec) reset(br byteBuffer, windowSize uint64) error {
 		}
 		return err
 	}
+	if cap(b.dst) <= maxSize {
+		b.dst = make([]byte, 0, maxSize+1)
+	}
 	return nil
 }
 
diff --git a/vendor/github.com/klauspost/compress/zstd/decoder.go b/vendor/github.com/klauspost/compress/zstd/decoder.go
index 30459cd3fb..7113e69ee3 100644
--- a/vendor/github.com/klauspost/compress/zstd/decoder.go
+++ b/vendor/github.com/klauspost/compress/zstd/decoder.go
@@ -40,8 +40,7 @@ type Decoder struct {
 	frame *frameDec
 
 	// Custom dictionaries.
-	// Always uses copies.
-	dicts map[uint32]dict
+	dicts map[uint32]*dict
 
 	// streamWg is the waitgroup for all streams
 	streamWg sync.WaitGroup
@@ -103,7 +102,7 @@ func NewReader(r io.Reader, opts ...DOption) (*Decoder, error) {
 	}
 
 	// Transfer option dicts.
-	d.dicts = make(map[uint32]dict, len(d.o.dicts))
+	d.dicts = make(map[uint32]*dict, len(d.o.dicts))
 	for _, dc := range d.o.dicts {
 		d.dicts[dc.id] = dc
 	}
@@ -341,15 +340,8 @@ func (d *Decoder) DecodeAll(input, dst []byte) ([]byte, error) {
 			}
 			return dst, err
 		}
-		if frame.DictionaryID != nil {
-			dict, ok := d.dicts[*frame.DictionaryID]
-			if !ok {
-				return nil, ErrUnknownDictionary
-			}
-			if debugDecoder {
-				println("setting dict", frame.DictionaryID)
-			}
-			frame.history.setDict(&dict)
+		if err = d.setDict(frame); err != nil {
+			return nil, err
 		}
 		if frame.WindowSize > d.o.maxWindowSize {
 			if debugDecoder {
@@ -495,18 +487,12 @@ func (d *Decoder) nextBlockSync() (ok bool) {
 		if !d.syncStream.inFrame {
 			d.frame.history.reset()
 			d.current.err = d.frame.reset(&d.syncStream.br)
+			if d.current.err == nil {
+				d.current.err = d.setDict(d.frame)
+			}
 			if d.current.err != nil {
 				return false
 			}
-			if d.frame.DictionaryID != nil {
-				dict, ok := d.dicts[*d.frame.DictionaryID]
-				if !ok {
-					d.current.err = ErrUnknownDictionary
-					return false
-				} else {
-					d.frame.history.setDict(&dict)
-				}
-			}
 			if d.frame.WindowSize > d.o.maxDecodedSize || d.frame.WindowSize > d.o.maxWindowSize {
 				d.current.err = ErrDecoderSizeExceeded
 				return false
@@ -865,13 +851,8 @@ decodeStream:
 		if debugDecoder && err != nil {
 			println("Frame decoder returned", err)
 		}
-		if err == nil && frame.DictionaryID != nil {
-			dict, ok := d.dicts[*frame.DictionaryID]
-			if !ok {
-				err = ErrUnknownDictionary
-			} else {
-				frame.history.setDict(&dict)
-			}
+		if err == nil {
+			err = d.setDict(frame)
 		}
 		if err == nil && d.frame.WindowSize > d.o.maxWindowSize {
 			if debugDecoder {
@@ -953,3 +934,20 @@ decodeStream:
 	hist.reset()
 	d.frame.history.b = frameHistCache
 }
+
+func (d *Decoder) setDict(frame *frameDec) (err error) {
+	dict, ok := d.dicts[frame.DictionaryID]
+	if ok {
+		if debugDecoder {
+			println("setting dict", frame.DictionaryID)
+		}
+		frame.history.setDict(dict)
+	} else if frame.DictionaryID != 0 {
+		// A zero or missing dictionary id is ambiguous:
+		// either dictionary zero, or no dictionary. In particular,
+		// zstd --patch-from uses this id for the source file,
+		// so only return an error if the dictionary id is not zero.
+		err = ErrUnknownDictionary
+	}
+	return err
+}
diff --git a/vendor/github.com/klauspost/compress/zstd/decoder_options.go b/vendor/github.com/klauspost/compress/zstd/decoder_options.go
index f42448e69c..07a90dd7af 100644
--- a/vendor/github.com/klauspost/compress/zstd/decoder_options.go
+++ b/vendor/github.com/klauspost/compress/zstd/decoder_options.go
@@ -6,6 +6,8 @@ package zstd
 
 import (
 	"errors"
+	"fmt"
+	"math/bits"
 	"runtime"
 )
 
@@ -18,7 +20,7 @@ type decoderOptions struct {
 	concurrent      int
 	maxDecodedSize  uint64
 	maxWindowSize   uint64
-	dicts           []dict
+	dicts           []*dict
 	ignoreChecksum  bool
 	limitToCap      bool
 	decodeBufsBelow int
@@ -85,7 +87,13 @@ func WithDecoderMaxMemory(n uint64) DOption {
 }
 
 // WithDecoderDicts allows to register one or more dictionaries for the decoder.
-// If several dictionaries with the same ID is provided the last one will be used.
+//
+// Each slice in dict must be in the [dictionary format] produced by
+// "zstd --train" from the Zstandard reference implementation.
+//
+// If several dictionaries with the same ID are provided, the last one will be used.
+//
+// [dictionary format]: https://github.com/facebook/zstd/blob/dev/doc/zstd_compression_format.md#dictionary-format
 func WithDecoderDicts(dicts ...[]byte) DOption {
 	return func(o *decoderOptions) error {
 		for _, b := range dicts {
@@ -93,12 +101,24 @@ func WithDecoderDicts(dicts ...[]byte) DOption {
 			if err != nil {
 				return err
 			}
-			o.dicts = append(o.dicts, *d)
+			o.dicts = append(o.dicts, d)
 		}
 		return nil
 	}
 }
 
+// WithEncoderDictRaw registers a dictionary that may be used by the decoder.
+// The slice content can be arbitrary data.
+func WithDecoderDictRaw(id uint32, content []byte) DOption {
+	return func(o *decoderOptions) error {
+		if bits.UintSize > 32 && uint(len(content)) > dictMaxLength {
+			return fmt.Errorf("dictionary of size %d > 2GiB too large", len(content))
+		}
+		o.dicts = append(o.dicts, &dict{id: id, content: content, offsets: [3]int{1, 4, 8}})
+		return nil
+	}
+}
+
 // WithDecoderMaxWindow allows to set a maximum window size for decodes.
 // This allows rejecting packets that will cause big memory usage.
 // The Decoder will likely allocate more memory based on the WithDecoderLowmem setting.
diff --git a/vendor/github.com/klauspost/compress/zstd/dict.go b/vendor/github.com/klauspost/compress/zstd/dict.go
index b2725f77b5..66a95c18ef 100644
--- a/vendor/github.com/klauspost/compress/zstd/dict.go
+++ b/vendor/github.com/klauspost/compress/zstd/dict.go
@@ -21,6 +21,9 @@ type dict struct {
 
 const dictMagic = "\x37\xa4\x30\xec"
 
+// Maximum dictionary size for the reference implementation (1.5.3) is 2 GiB.
+const dictMaxLength = 1 << 31
+
 // ID returns the dictionary id or 0 if d is nil.
 func (d *dict) ID() uint32 {
 	if d == nil {
diff --git a/vendor/github.com/klauspost/compress/zstd/encoder_options.go b/vendor/github.com/klauspost/compress/zstd/encoder_options.go
index 6015f498af..8e15be2f7f 100644
--- a/vendor/github.com/klauspost/compress/zstd/encoder_options.go
+++ b/vendor/github.com/klauspost/compress/zstd/encoder_options.go
@@ -4,6 +4,7 @@ import (
 	"errors"
 	"fmt"
 	"math"
+	"math/bits"
 	"runtime"
 	"strings"
 )
@@ -305,7 +306,13 @@ func WithLowerEncoderMem(b bool) EOption {
 }
 
 // WithEncoderDict allows to register a dictionary that will be used for the encode.
+//
+// The slice dict must be in the [dictionary format] produced by
+// "zstd --train" from the Zstandard reference implementation.
+//
 // The encoder *may* choose to use no dictionary instead for certain payloads.
+//
+// [dictionary format]: https://github.com/facebook/zstd/blob/dev/doc/zstd_compression_format.md#dictionary-format
 func WithEncoderDict(dict []byte) EOption {
 	return func(o *encoderOptions) error {
 		d, err := loadDict(dict)
@@ -316,3 +323,17 @@ func WithEncoderDict(dict []byte) EOption {
 		return nil
 	}
 }
+
+// WithEncoderDictRaw registers a dictionary that may be used by the encoder.
+//
+// The slice content may contain arbitrary data. It will be used as an initial
+// history.
+func WithEncoderDictRaw(id uint32, content []byte) EOption {
+	return func(o *encoderOptions) error {
+		if bits.UintSize > 32 && uint(len(content)) > dictMaxLength {
+			return fmt.Errorf("dictionary of size %d > 2GiB too large", len(content))
+		}
+		o.dict = &dict{id: id, content: content, offsets: [3]int{1, 4, 8}}
+		return nil
+	}
+}
diff --git a/vendor/github.com/klauspost/compress/zstd/framedec.go b/vendor/github.com/klauspost/compress/zstd/framedec.go
index 65984bf07c..d8e8a05bd7 100644
--- a/vendor/github.com/klauspost/compress/zstd/framedec.go
+++ b/vendor/github.com/klauspost/compress/zstd/framedec.go
@@ -29,7 +29,7 @@ type frameDec struct {
 
 	FrameContentSize uint64
 
-	DictionaryID  *uint32
+	DictionaryID  uint32
 	HasCheckSum   bool
 	SingleSegment bool
 }
@@ -155,7 +155,7 @@ func (d *frameDec) reset(br byteBuffer) error {
 
 	// Read Dictionary_ID
 	// https://github.com/facebook/zstd/blob/dev/doc/zstd_compression_format.md#dictionary_id
-	d.DictionaryID = nil
+	d.DictionaryID = 0
 	if size := fhd & 3; size != 0 {
 		if size == 3 {
 			size = 4
@@ -178,11 +178,7 @@ func (d *frameDec) reset(br byteBuffer) error {
 		if debugDecoder {
 			println("Dict size", size, "ID:", id)
 		}
-		if id > 0 {
-			// ID 0 means "sorry, no dictionary anyway".
-			// https://github.com/facebook/zstd/blob/dev/doc/zstd_compression_format.md#dictionary-format
-			d.DictionaryID = &id
-		}
+		d.DictionaryID = id
 	}
 
 	// Read Frame_Content_Size
diff --git a/vendor/github.com/klauspost/compress/zstd/zstd.go b/vendor/github.com/klauspost/compress/zstd/zstd.go
index b1886f7c74..5ffa82f5ac 100644
--- a/vendor/github.com/klauspost/compress/zstd/zstd.go
+++ b/vendor/github.com/klauspost/compress/zstd/zstd.go
@@ -72,7 +72,6 @@ var (
 	ErrDecoderSizeExceeded = errors.New("decompressed size exceeds configured limit")
 
 	// ErrUnknownDictionary is returned if the dictionary ID is unknown.
-	// For the time being dictionaries are not supported.
 	ErrUnknownDictionary = errors.New("unknown dictionary")
 
 	// ErrFrameSizeExceeded is returned if the stated frame size is exceeded.
diff --git a/vendor/github.com/sigstore/fulcio/pkg/certificate/doc.go b/vendor/github.com/sigstore/fulcio/pkg/certificate/doc.go
new file mode 100644
index 0000000000..a61decc20d
--- /dev/null
+++ b/vendor/github.com/sigstore/fulcio/pkg/certificate/doc.go
@@ -0,0 +1,17 @@
+// Copyright 2022 The Sigstore Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Package certificate contains helpers for getting data from Fulcio issued
+// x509 certificates.
+package certificate
diff --git a/vendor/github.com/sigstore/fulcio/pkg/certificate/extensions.go b/vendor/github.com/sigstore/fulcio/pkg/certificate/extensions.go
new file mode 100644
index 0000000000..b58a7bc934
--- /dev/null
+++ b/vendor/github.com/sigstore/fulcio/pkg/certificate/extensions.go
@@ -0,0 +1,132 @@
+// Copyright 2022 The Sigstore Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package certificate
+
+import (
+	"crypto/x509/pkix"
+	"encoding/asn1"
+	"errors"
+)
+
+var (
+	OIDIssuer                   = asn1.ObjectIdentifier{1, 3, 6, 1, 4, 1, 57264, 1, 1}
+	OIDGitHubWorkflowTrigger    = asn1.ObjectIdentifier{1, 3, 6, 1, 4, 1, 57264, 1, 2}
+	OIDGitHubWorkflowSHA        = asn1.ObjectIdentifier{1, 3, 6, 1, 4, 1, 57264, 1, 3}
+	OIDGitHubWorkflowName       = asn1.ObjectIdentifier{1, 3, 6, 1, 4, 1, 57264, 1, 4}
+	OIDGitHubWorkflowRepository = asn1.ObjectIdentifier{1, 3, 6, 1, 4, 1, 57264, 1, 5}
+	OIDGitHubWorkflowRef        = asn1.ObjectIdentifier{1, 3, 6, 1, 4, 1, 57264, 1, 6}
+	OIDOtherName                = asn1.ObjectIdentifier{1, 3, 6, 1, 4, 1, 57264, 1, 7}
+)
+
+// Extensions contains all custom x509 extensions defined by Fulcio
+type Extensions struct {
+	// NB: New extensions must be added here and documented
+	// at docs/oidc-info.md
+
+	// The OIDC issuer. Should match `iss` claim of ID token or, in the case of
+	// a federated login like Dex it should match the issuer URL of the
+	// upstream issuer. The issuer is not set the extensions are invalid and
+	// will fail to render.
+	Issuer string // OID 1.3.6.1.4.1.57264.1.1
+
+	// Triggering event of the Github Workflow. Matches the `event_name` claim of ID
+	// tokens from Github Actions
+	GithubWorkflowTrigger string // OID 1.3.6.1.4.1.57264.1.2
+
+	// SHA of git commit being built in Github Actions. Matches the `sha` claim of ID
+	// tokens from Github Actions
+	GithubWorkflowSHA string // OID 1.3.6.1.4.1.57264.1.3
+
+	// Name of Github Actions Workflow. Matches the `workflow` claim of the ID
+	// tokens from Github Actions
+	GithubWorkflowName string // OID 1.3.6.1.4.1.57264.1.4
+
+	// Repository of the Github Actions Workflow. Matches the `repository` claim of the ID
+	// tokens from Github Actions
+	GithubWorkflowRepository string // OID 1.3.6.1.4.1.57264.1.5
+
+	// Git Ref of the Github Actions Workflow. Matches the `ref` claim of the ID tokens
+	// from Github Actions
+	GithubWorkflowRef string // 1.3.6.1.4.1.57264.1.6
+}
+
+func (e Extensions) Render() ([]pkix.Extension, error) {
+	var exts []pkix.Extension
+
+	if e.Issuer != "" {
+		exts = append(exts, pkix.Extension{
+			Id:    OIDIssuer,
+			Value: []byte(e.Issuer),
+		})
+	} else {
+		return nil, errors.New("extensions must have a non-empty issuer url")
+	}
+	if e.GithubWorkflowTrigger != "" {
+		exts = append(exts, pkix.Extension{
+			Id:    OIDGitHubWorkflowTrigger,
+			Value: []byte(e.GithubWorkflowTrigger),
+		})
+	}
+	if e.GithubWorkflowSHA != "" {
+		exts = append(exts, pkix.Extension{
+			Id:    OIDGitHubWorkflowSHA,
+			Value: []byte(e.GithubWorkflowSHA),
+		})
+	}
+	if e.GithubWorkflowName != "" {
+		exts = append(exts, pkix.Extension{
+			Id:    OIDGitHubWorkflowName,
+			Value: []byte(e.GithubWorkflowName),
+		})
+	}
+	if e.GithubWorkflowRepository != "" {
+		exts = append(exts, pkix.Extension{
+			Id:    OIDGitHubWorkflowRepository,
+			Value: []byte(e.GithubWorkflowRepository),
+		})
+	}
+	if e.GithubWorkflowRef != "" {
+		exts = append(exts, pkix.Extension{
+			Id:    OIDGitHubWorkflowRef,
+			Value: []byte(e.GithubWorkflowRef),
+		})
+	}
+	return exts, nil
+}
+
+func ParseExtensions(ext []pkix.Extension) (Extensions, error) {
+	out := Extensions{}
+
+	for _, e := range ext {
+		switch {
+		case e.Id.Equal(OIDIssuer):
+			out.Issuer = string(e.Value)
+		case e.Id.Equal(OIDGitHubWorkflowTrigger):
+			out.GithubWorkflowTrigger = string(e.Value)
+		case e.Id.Equal(OIDGitHubWorkflowSHA):
+			out.GithubWorkflowSHA = string(e.Value)
+		case e.Id.Equal(OIDGitHubWorkflowName):
+			out.GithubWorkflowName = string(e.Value)
+		case e.Id.Equal(OIDGitHubWorkflowRepository):
+			out.GithubWorkflowRepository = string(e.Value)
+		case e.Id.Equal(OIDGitHubWorkflowRef):
+			out.GithubWorkflowRef = string(e.Value)
+		}
+	}
+
+	// We only ever return nil, but leaving error in place so that we can add
+	// more complex parsing of fields in a backwards compatible way if needed.
+	return out, nil
+}
diff --git a/vendor/github.com/sigstore/sigstore/pkg/oauth/interactive.go b/vendor/github.com/sigstore/sigstore/pkg/oauth/interactive.go
index b99697adee..e745911a52 100644
--- a/vendor/github.com/sigstore/sigstore/pkg/oauth/interactive.go
+++ b/vendor/github.com/sigstore/sigstore/pkg/oauth/interactive.go
@@ -17,12 +17,64 @@ package oauth
 
 const (
 	// InteractiveSuccessHTML is the page displayed upon success when using a web browser during an interactive Oauth token flow.
-	InteractiveSuccessHTML = `<html>
-<title>Sigstore Auth</title>
-<body>
-<h1>Sigstore Auth Successful</h1>
-<p>You may now close this page.</p>
-</body>
+	InteractiveSuccessHTML = `<!DOCTYPE html>
+<html>
+	<head>
+		<title>Sigstore Authentication</title>
+		<link id="favicon" rel="icon" type="image/svg"/>
+		<style>
+			:root { font-family: "Trebuchet MS", sans-serif; height: 100%; color: #444444; overflow: hidden; }
+			body { display: flex; justify-content: center; height: 100%; margin: 0 10%; background: #FFEAD7; }
+			.container { display: flex; flex-direction: column; justify-content: space-between; }
+			.sigstore { color: #2F2E71; font-weight: bold; }
+			.header { position: absolute; top: 30px; left: 22px; }
+			.title { font-size: 3.5em; margin-bottom: 30px; animation: 750ms ease-in-out 0s 1 show; }
+			.content { font-size: 1.5em; animation: 250ms hide, 750ms ease-in-out 250ms 1 show; }
+			.anchor { position: relative; }
+			.links { display: flex; justify-content: space-between; font-size: 1.2em; padding: 60px 0; position: absolute; bottom: 0; left: 0; right: 0; animation: 500ms hide, 750ms ease-in-out 500ms 1 show; }
+			.link { color: #444444; text-decoration: none; user-select: none; }
+			.link:hover { color: #6349FF; }
+			.link:hover>.arrow { transform: scaleX(1.5) translateX(3px); }
+			.link:hover>.sigstore { color: inherit; }
+			.link, .arrow { transition: 200ms; }
+			.arrow { display: inline-block; margin-left: 6px; transform: scaleX(1.5); }
+			@keyframes hide { 0%, 100% { opacity: 0; } }
+			@keyframes show { 0% { opacity: 0; transform: translateY(40px); } 100% { opacity: 1; } }
+		</style>
+	</head>
+	<body>
+		<div class="container">
+			<div>
+				<a class="header" href="https://sigstore.dev">
+					<svg id="logo" xmlns="http://www.w3.org/2000/svg" xml:space="preserve" width="28.14" height="30.3">
+						<circle r="7" cx="14" cy="15" fill="#FFEAD7"></circle>
+						<path fill="#2F2E71" d="M27.8 10.9c-.3-1.2-.9-2.2-1.7-3.1-.6-.7-1.3-1.3-2-2-.7-.6-1.2-1.3-1.5-2.1-.2-.4-.4-.8-.7-1.2-.5-.7-1.3-1.2-2.1-1.6-1.3-.7-2.7-.9-4.2-.9-.8 0-1.6.1-2.4.3-1.2.2-2.3.7-3.4 1.3-.7.4-1.3.9-1.9 1.4-1 .8-2 1.6-2.8 2.6-.6.8-1.4 1.3-2.2 1.8-.8.4-1.4 1-2 1.6-.6.6-.9 1.3-.9 2.1 0 .6.1 1.2.2 1.7.2.9.6 1.7.9 2.6.2.5.3 1 .3 1.5s0 1-.1 1.5c-.1 1.1 0 2.3.2 3.4.2 1 .8 1.8 1.8 2.2.1.1.3.1.4.1.2.1.2.2.1.3l-.1.1c-.4.5-.7 1.1-.6 1.8.1 1.1 1.3 1.8 2.3 1.3.6-.2 1.2 0 1.4.4.1.1.1.2.2.3.2.5.4.9.7 1.3.4.5.9.7 1.6.6.4-.1.8-.2 1.2-.4.7-.4 1.3-.9 2-1.5.2-.2.4-.2.7-.2.4 0 .8.2 1.2.5.6.4 1.2.7 1.9.9 1.3.4 2.5.5 3.8.2 1.3-.3 2.4-.9 3.4-1.6.7-.5 1.2-1 1.6-1.7.4-.7.6-1.4.8-2.2.3-1.1.4-2.2.4-3.4.1-1 .2-1.9.5-2.8.2-.7.5-1.4.8-2.1.2-.6.4-1.2.5-1.9.1-1.1 0-2.1-.3-3.1zM14.9.8c.3-.1.7-.1 1-.1h.3c1.1 0 2.1.2 3.1.5.6.2 1.2.6 1.7 1s.7.9.9 1.4v.1c0 .1 0 .2-.1.2s-.1 0-.2-.1c-.4-.4-.7-.8-1.1-1.1-.6-.5-1.2-.9-2-1.1-1.1-.3-2.1-.5-3.2-.7h-.6c.1 0 .1 0 .2-.1-.1 0 0 0 0 0zm-4.5 12.4c.6 0 1.1.5 1.2 1.2 0 .6-.5 1.2-1.2 1.2-.6 0-1.2-.5-1.1-1.2 0-.7.5-1.2 1.1-1.2zm3.8 1.3v-3.4c0-2.3 2-3.1 3.6-2.5.3.1.6.3.9.5.2.2.2.5.1.8-.2.2-.4.3-.7.1-.2-.1-.5-.2-.7-.3-.6-.2-1.3 0-1.6.4-.1.2-.2.4-.2.7-.1.5 0 .9 0 1.4v5.9c0 1.2-.6 2.1-1.8 2.4-1 .3-1.9.2-2.7-.6-.2-.2-.3-.5-.1-.7.1-.2.4-.3.7-.2.3.1.6.3.9.4 1 .1 1.7-.3 1.7-1.4-.1-1.2-.1-2.3-.1-3.5zm-8.8 7.6h-.1c-.1-.1-.2-.1-.3-.2-.2-.2-.4-.3-.6-.5-.3-.3-.5-.6-.7-1-.4-.8-.8-1.7-1-2.7-.1-.5-.2-1-.2-1.5s-.1-1-.2-1.4c-.1-.7-.2-1.5-.2-2.2 0-.9.1-1.7.4-2.5.3-.9.7-1.7 1.4-2.4.6-.6 1.1-1.2 1.7-1.8.1-.1.3-.2.4-.2 0 .1-.1.3-.2.4-.3.4-.6.7-.9 1.1-.5.6-.9 1.2-1.2 1.8-.4.7-.7 1.4-.9 2.2-.1.4-.2.8-.2 1.2 0 .4-.1.8 0 1.3 0 .6.1 1.1.2 1.6.1.6.2 1.1.2 1.7 0 .7.2 1.4.4 2.1 0 .2.2.3.2.5.3.6.6 1.1 1.1 1.5.2.2.4.5.6.7 0 0 0 .1.1.1v.2zM8 24.6c-.4 0-.7.1-1.1.2-.4.1-.6-.1-.7-.5 0-.1-.1-.3 0-.4.1-.3.3-.3.5-.1.2.2.5.4.7.5.1.1.2.1.4.1.1 0 .2.1.4.2H8zm7.6 2.1c-.3.2-.7.3-1.1.3-.3 0-.6-.1-.9-.1h-.2c-.4.1-.7.1-1.1.2-.1 0-.3 0-.4.1H11c-.4 0-.7-.2-1-.5-.1-.1-.2-.3-.3-.5-.1-.1-.1-.2-.1-.4 0-.1.1-.1.2-.1h.1c.5.3 1.1.4 1.6.5.7.1 1.4.2 2.1.2.4 0 .7.1 1.1.1h.8c.2.1.1.1.1.2zm3.7-2.5c-.7.4-1.5.7-2.3.9-.2 0-.5.1-.7.1-.2 0-.5 0-.7.1-.4.1-.8 0-1.2 0-.3 0-.6-.1-.9 0h-.2c-.4-.1-.9-.2-1.3-.3-.5-.1-1-.3-1.4-.5-.4-.1-.8-.3-1.1-.5-.2-.1-.4-.3-.6-.4-.6-.6-1.2-1.1-1.7-1.6-.4-.5-.8-.9-1.2-1.4-.4-.6-.7-1.2-1-1.9l-.3-.9c-.1-.3-.2-.5-.2-.8v-.8c.3.8.5 1.7.9 2.5.7 1.6 1.7 3 3 4.1 1.4 1.1 2.9 1.8 4.6 2.1.9.2 1.8.2 2.7.2 1.1-.1 2.2-.3 3.2-.8.2-.1.3-.2.5-.2 0 .1 0 .1-.1.1zm.1-8.7c-.6 0-1.1-.5-1.1-1.2 0-.6.5-1.2 1.2-1.2.6 0 1.1.5 1.1 1.2s-.5 1.3-1.2 1.2zm6.2 5.7c0 .4-.1.8-.2 1.2-.1.4-.1.9-.3 1.3-.1.4-.2.7-.4 1.1-.1.3-.3.6-.6.8-.3.2-.5.4-.9.5-.4.2-.7.3-1.2.3h-.9c-.2-.1-.2-.1-.1-.3.1-.2.3-.3.5-.4.3-.2.6-.5.8-.7.7-.7 1.3-1.6 1.9-2.4.4-.4.6-1 .9-1.5.1-.1.1-.2.2-.3.3.2.3.3.3.4zm-15-16.8c1.7-.8 3.5-1.1 5.3-.9.4 0 .8.1 1.1.3l1.8.6c.6.2 1.2.5 1.7.8.7.4 1.3.9 1.9 1.5.8.8 1.5 1.6 2 2.6.3.6.5 1.2.7 1.8.2.7.4 1.5.4 2.2v.9c0 .4-.1.8-.1 1.2v-1c0-1.2-.3-2.3-.6-3.4l-.6-1.5c-.2-.6-.5-1.1-.9-1.6-.1-.1-.3-.1-.4-.2-.1 0-.1 0-.2-.1-.5-.5-1.1-1-1.7-1.5-.8-.6-1.7-1.1-2.6-1.4-.4-.2-.8-.3-1.2-.4-.9-.2-1.8-.4-2.7-.3h-.9c-.3 0-.6.1-1 .2-.6.1-1.2.3-1.7.5h-.1s-.1 0 0-.1c0 0 0-.1-.1-.2m16.2 11.1c-.1-.8 0-1.7 0-2.5-.1-.8-.2-1.6-.4-2.4.5.7.6 1.6.7 2.4 0 .8 0 1.7-.3 2.5zm.6.5c0-.3.1-.7.2-1.1.1-.4.1-.9.1-1.3v-.4c0-.8-.2-1.6-.4-2.4-.4-.9-.8-1.6-1.4-2.4-.5-.6-.9-1.2-1.4-1.8l-.2-.2c.1 0 .1 0 .1.1 1 .8 1.8 1.6 2.4 2.7.5 1 .9 2 1 3.1.3 1.3.1 2.5-.4 3.7z"/>
+					</svg><svg xmlns="http://www.w3.org/2000/svg" xml:space="preserve" width="120" height="30.3" viewBox="28.14 0 120 30.3">
+						<path fill="#2F2E71" d="M57.7 18c.9 0 1.9-.1 2.9.3.9.3 1.5.9 1.7 2 .1 1-.2 1.9-1.1 2.5-1.1.8-2.3.9-3.6 1-1.4 0-2.9 0-4.3-.6-1.6-.7-1.8-2.6-.4-3.6.3-.2.2-.3.1-.5-.7-.8-.7-2.2.3-2.8.3-.2.2-.3 0-.6-1.4-1.6-.7-4.1 1.3-4.8 1.6-.6 3.2-.6 4.8-.1.2.1.3.1.5-.1.3-.3.6-.5.9-.7.5-.3 1.1-.3 1.4 0 .3.4.3.9-.2 1.3-.7.5-.8 1-.6 1.9.4 1.5-.6 2.9-2.1 3.4-1.3.5-2.7.5-4 .2-.3-.1-.5-.1-.6.2-.1.3-.1.6.2.8.2.1.5.2.8.2h2zm-.6-2.7c.3 0 .5 0 .7-.1.8-.2 1.3-.7 1.4-1.4.1-.7-.3-1.3-.9-1.6-.8-.3-1.6-.3-2.4 0-1 .4-1.2 1.7-.6 2.4.5.6 1.2.7 1.8.7zm-.2 4.6h-1.8c-.4 0-.6.2-.7.5-.3.7.1 1.2.9 1.4 1.2.2 2.5.2 3.7-.1l.6-.3c.5-.3.4-1.1-.1-1.3-.2-.1-.5-.2-.7-.2h-1.9zm58.6-3.3h-3.2c-.3 0-.3.1-.3.4.2 1.2 1.3 2.1 2.8 2.3 1.1.1 2.1-.1 2.9-.9.2-.2.4-.3.6-.4.4-.2.8-.2 1.1.1.4.3.4.7.3 1.1-.3.9-.9 1.4-1.7 1.8-2.3 1-4.5.9-6.5-.6-1-.7-1.5-1.8-1.7-3-.3-1.7-.2-3.3.8-4.7 1.3-1.8 3.1-2.4 5.2-2.1 2 .3 3.4 1.3 4 3.2.2.6.3 1.2.2 1.8-.1.8-.4 1.1-1.2 1.1-1.1-.1-2.2-.1-3.3-.1zm-.7-1.9h2.4c.4 0 .4-.1.4-.5-.3-1.1-1.2-1.9-2.5-2-1.5-.1-2.6.6-3.1 1.9-.2.5-.1.6.4.6h2.4zm-23 6.7c-3.3 0-5.5-2.2-5.6-5.5 0-3.2 2.2-5.6 5.4-5.6 3.4 0 5.7 2.2 5.8 5.5 0 3.4-2.2 5.6-5.6 5.6zm0-2.1c1.9 0 3.2-1.3 3.3-3.3.1-2-1.3-3.4-3.2-3.4-1.8 0-3.2 1.4-3.2 3.3-.1 1.9 1.2 3.4 3.1 3.4zm-22.6 2.1c-1.1 0-2.4-.3-3.5-1.4-.3-.4-.6-.8-.7-1.3 0-.4.1-.7.4-.9.3-.2.7-.2 1 0 .3.2.6.4.8.6.9.9 2 1.1 3.2.9.6-.1 1-.5 1-1 .1-.5-.2-1-.8-1.2-.7-.3-1.4-.3-2.1-.5-.8-.2-1.6-.4-2.2-.9-1.5-1.2-1.4-3.5.2-4.6 1.2-.8 2.6-.9 4-.7 1 .1 1.9.5 2.6 1.2.3.3.4.6.5.9.1.4 0 .7-.3 1-.3.3-.7.3-1 .1-.4-.2-.7-.5-1.1-.8-.8-.6-1.7-.8-2.7-.5-.6.1-.9.5-.9 1s.3.9.8 1.1c.9.3 1.9.4 2.9.7.6.2 1.1.4 1.5.8 1.5 1.4 1.1 4.1-.9 5.1-.7.3-1.5.4-2.7.4zm-30.3 0c-1.5 0-3-.3-4.1-1.5-.3-.3-.4-.6-.5-1-.1-.4-.1-.8.3-1.1.4-.2.9-.2 1.3.1.3.2.6.5.8.7.9.8 1.9.9 3 .7.6-.1.9-.5.9-1.1 0-.5-.3-1-.8-1.2l-2.7-.6c-1.1-.3-2-.8-2.4-2-.6-1.7.4-3.4 2.2-3.9 1.7-.5 3.3-.3 4.8.5.6.3 1 .8 1.2 1.4.1.4.1.9-.3 1.1-.4.3-.8.2-1.2-.1-.4-.3-.7-.7-1.2-.9-.8-.4-1.5-.5-2.4-.3-.5.1-.8.4-.8.9s.2.8.7 1c.7.3 1.4.3 2.1.5.8.2 1.5.3 2.2.8 1.2.8 1.5 2.5.9 3.8-.7 1.4-1.9 1.8-3.3 2-.3.2-.5.2-.7.2zM78 15.8v-2.6c0-.3-.1-.4-.4-.4h-1.3c-.6-.1-.9-.5-.9-1s.4-1 .9-1h1.3c.3 0 .4-.1.4-.4V8.9c0-.7.5-1.1 1.1-1.2.6 0 1.1.4 1.2 1v.6c0 .4-.2 1 .1 1.3.3.3.9.1 1.3.1h1.6c.4 0 .7.3.8.8.1.4-.1.8-.4 1.1-.3.2-.6.2-.9.2h-2.1c-.3 0-.4 0-.4.4v4.7c0 1.1.9 1.6 1.9 1.1.3-.1.5-.3.7-.5.4-.3.8-.3 1.2 0 .4.3.4.8.2 1.2-.3.7-.9 1.1-1.5 1.3-1.3.5-2.6.5-3.8-.4-.7-.6-1-1.4-1.1-2.4.1-.7.1-1.6.1-2.4zm24.7-4.1c.8-1 1.8-1.4 3-1.3.7.1 1.4.3 1.9.9.3.4.5.9.4 1.5-.1.4-.3.7-.7.9-.5.2-.9 0-1.3-.3-.7-.7-1.3-.9-2.1-.5-.5.3-.8.7-1 1.3-.2.5-.3 1.1-.3 1.6v4.5c0 .5-.2.9-.6 1.1-.4.2-.8.2-1.2-.1-.4-.3-.5-.7-.5-1.1v-8.4c0-.7.4-1.2 1-1.3.7-.1 1.1.3 1.3 1.1.1-.1.1 0 .1.1zm-54 4.2v4.3c0 .8-.6 1.3-1.4 1.2-.5-.1-.9-.5-.9-1.1v-8.7c0-.7.5-1.1 1.2-1.1s1.1.4 1.2 1.2c-.1 1.3-.1 2.8-.1 4.2zm.3-8.2c0 .8-.6 1.4-1.4 1.4-.8 0-1.5-.6-1.5-1.4 0-.8.7-1.4 1.5-1.4s1.4.6 1.4 1.4z"/>
+					</svg>
+				</a>
+			</div>
+			<div>
+				<div class="title">
+					<span class="sigstore">sigstore </span>
+					<span>authentication successful!</span>
+				</div>
+				<div class="content">
+					<span>You may now close this page.</span>
+				</div>
+			</div>
+			<div class="anchor">
+				<div class="links">
+					<a href="https://sigstore.dev/" class="link login"><span class="sigstore">sigstore</span> home <span class="arrow">→</span></a>
+					<a href="https://docs.sigstore.dev/" class="link login"><span class="sigstore">sigstore</span> documentation <span class="arrow">→</span></a>
+					<a href="https://blog.sigstore.dev/" class="link"><span class="sigstore">sigstore</span> blog <span class="arrow">→</span></a>
+				</div>
+			</div>
+		</div>
+		<script>
+			document.getElementById("favicon").setAttribute("href", "data:image/svg+xml," + encodeURIComponent(document.getElementById("logo").outerHTML));
+		</script>
+	</body>
 </html>
 `
 )
diff --git a/vendor/google.golang.org/genproto/googleapis/rpc/status/status.pb.go b/vendor/google.golang.org/genproto/googleapis/rpc/status/status.pb.go
index f34a38e4e9..a6b5081888 100644
--- a/vendor/google.golang.org/genproto/googleapis/rpc/status/status.pb.go
+++ b/vendor/google.golang.org/genproto/googleapis/rpc/status/status.pb.go
@@ -1,4 +1,4 @@
-// Copyright 2020 Google LLC
+// Copyright 2022 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -15,7 +15,7 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
 // 	protoc-gen-go v1.26.0
-// 	protoc        v3.12.2
+// 	protoc        v3.21.9
 // source: google/rpc/status.proto
 
 package status
@@ -48,11 +48,13 @@ type Status struct {
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
-	// The status code, which should be an enum value of [google.rpc.Code][google.rpc.Code].
+	// The status code, which should be an enum value of
+	// [google.rpc.Code][google.rpc.Code].
 	Code int32 `protobuf:"varint,1,opt,name=code,proto3" json:"code,omitempty"`
 	// A developer-facing error message, which should be in English. Any
 	// user-facing error message should be localized and sent in the
-	// [google.rpc.Status.details][google.rpc.Status.details] field, or localized by the client.
+	// [google.rpc.Status.details][google.rpc.Status.details] field, or localized
+	// by the client.
 	Message string `protobuf:"bytes,2,opt,name=message,proto3" json:"message,omitempty"`
 	// A list of messages that carry the error details.  There is a common set of
 	// message types for APIs to use.
diff --git a/vendor/modules.txt b/vendor/modules.txt
index bf61205cb6..a2aeb8d8f1 100644
--- a/vendor/modules.txt
+++ b/vendor/modules.txt
@@ -59,7 +59,7 @@ github.com/containers/common/pkg/flag
 github.com/containers/common/pkg/report
 github.com/containers/common/pkg/report/camelcase
 github.com/containers/common/pkg/retry
-# github.com/containers/image/v5 v5.23.1-0.20230113185223-cf9ccfb4d9b1
+# github.com/containers/image/v5 v5.23.1-0.20230123151557-ed23a0036192
 ## explicit; go 1.17
 github.com/containers/image/v5/copy
 github.com/containers/image/v5/directory
@@ -128,7 +128,7 @@ github.com/containers/image/v5/transports
 github.com/containers/image/v5/transports/alltransports
 github.com/containers/image/v5/types
 github.com/containers/image/v5/version
-# github.com/containers/libtrust v0.0.0-20200511145503-9c3a6c22cd9a
+# github.com/containers/libtrust v0.0.0-20230121012942-c1716e8a8d01
 ## explicit
 github.com/containers/libtrust
 # github.com/containers/ocicrypt v1.1.7
@@ -196,9 +196,12 @@ github.com/containers/storage/pkg/tarlog
 github.com/containers/storage/pkg/truncindex
 github.com/containers/storage/pkg/unshare
 github.com/containers/storage/types
-# github.com/coreos/go-oidc/v3 v3.4.0
+# github.com/coreos/go-oidc/v3 v3.5.0
 ## explicit; go 1.14
 github.com/coreos/go-oidc/v3/oidc
+# github.com/cyberphone/json-canonicalization v0.0.0-20220623050100-57a0ce2678a7
+## explicit
+github.com/cyberphone/json-canonicalization/go/src/webpki.org/jsoncanonicalizer
 # github.com/cyphar/filepath-securejoin v0.2.3
 ## explicit; go 1.13
 github.com/cyphar/filepath-securejoin
@@ -212,7 +215,7 @@ github.com/docker/distribution/reference
 github.com/docker/distribution/registry/api/errcode
 github.com/docker/distribution/registry/api/v2
 github.com/docker/distribution/registry/client/auth/challenge
-# github.com/docker/docker v20.10.22+incompatible
+# github.com/docker/docker v20.10.23+incompatible
 ## explicit
 github.com/docker/docker/api
 github.com/docker/docker/api/types
@@ -249,6 +252,11 @@ github.com/docker/go-units
 # github.com/ghodss/yaml v1.0.0
 ## explicit
 github.com/ghodss/yaml
+# github.com/go-jose/go-jose/v3 v3.0.0
+## explicit; go 1.12
+github.com/go-jose/go-jose/v3
+github.com/go-jose/go-jose/v3/cipher
+github.com/go-jose/go-jose/v3/json
 # github.com/go-openapi/analysis v0.21.4
 ## explicit; go 1.13
 github.com/go-openapi/analysis
@@ -361,7 +369,7 @@ github.com/josharian/intern
 # github.com/json-iterator/go v1.1.12
 ## explicit; go 1.12
 github.com/json-iterator/go
-# github.com/klauspost/compress v1.15.14
+# github.com/klauspost/compress v1.15.15
 ## explicit; go 1.17
 github.com/klauspost/compress
 github.com/klauspost/compress/flate
@@ -481,6 +489,7 @@ github.com/segmentio/ksuid
 # github.com/sigstore/fulcio v1.0.0
 ## explicit; go 1.18
 github.com/sigstore/fulcio/pkg/api
+github.com/sigstore/fulcio/pkg/certificate
 # github.com/sigstore/rekor v1.0.1
 ## explicit; go 1.18
 github.com/sigstore/rekor/pkg/client
@@ -491,7 +500,7 @@ github.com/sigstore/rekor/pkg/generated/client/pubkey
 github.com/sigstore/rekor/pkg/generated/client/tlog
 github.com/sigstore/rekor/pkg/generated/models
 github.com/sigstore/rekor/pkg/util
-# github.com/sigstore/sigstore v1.5.0
+# github.com/sigstore/sigstore v1.5.1
 ## explicit; go 1.18
 github.com/sigstore/sigstore/pkg/cryptoutils
 github.com/sigstore/sigstore/pkg/oauth
@@ -669,7 +678,7 @@ google.golang.org/appengine/internal/log
 google.golang.org/appengine/internal/remote_api
 google.golang.org/appengine/internal/urlfetch
 google.golang.org/appengine/urlfetch
-# google.golang.org/genproto v0.0.0-20221207170731-23e4bf6bdc37
+# google.golang.org/genproto v0.0.0-20221227171554-f9683d7f8bef
 ## explicit; go 1.19
 google.golang.org/genproto/googleapis/rpc/status
 # google.golang.org/grpc v1.51.0