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Problem: no keyring interface for e2ee to store arbitrary payload (#1413
) changelo add age encrypt/decrypt in unit test Update x/e2ee/keyring/keyring.go Signed-off-by: yihuang <[email protected]> fix lint
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,202 @@ | ||
| package keyring | ||
|
|
||
| import ( | ||
| "bufio" | ||
| "fmt" | ||
| "io" | ||
| "os" | ||
| "path/filepath" | ||
|
|
||
| "github.com/99designs/keyring" | ||
| "golang.org/x/crypto/bcrypt" | ||
|
|
||
| errorsmod "cosmossdk.io/errors" | ||
| "github.com/cosmos/cosmos-sdk/client/input" | ||
| sdkkeyring "github.com/cosmos/cosmos-sdk/crypto/keyring" | ||
| ) | ||
|
|
||
| const ( | ||
| keyringFileDirName = "e2ee-keyring-file" | ||
| keyringTestDirName = "e2ee-keyring-test" | ||
| passKeyringPrefix = "e2ee-keyring-%s" //nolint: gosec | ||
| maxPassphraseEntryAttempts = 3 | ||
| ) | ||
|
|
||
| type Keyring interface { | ||
| Get(string) ([]byte, error) | ||
| Set(string, []byte) error | ||
| } | ||
|
|
||
| func New( | ||
| appName, backend, rootDir string, userInput io.Reader, | ||
| ) (Keyring, error) { | ||
| var ( | ||
| db keyring.Keyring | ||
| err error | ||
| ) | ||
| serviceName := appName + "-e2ee" | ||
| switch backend { | ||
| case sdkkeyring.BackendMemory: | ||
| return newKeystore(keyring.NewArrayKeyring(nil), sdkkeyring.BackendMemory), nil | ||
| case sdkkeyring.BackendTest: | ||
| db, err = keyring.Open(keyring.Config{ | ||
| AllowedBackends: []keyring.BackendType{keyring.FileBackend}, | ||
| ServiceName: serviceName, | ||
| FileDir: filepath.Join(rootDir, keyringTestDirName), | ||
| FilePasswordFunc: func(_ string) (string, error) { | ||
| return "test", nil | ||
| }, | ||
| }) | ||
| case sdkkeyring.BackendFile: | ||
| fileDir := filepath.Join(rootDir, keyringFileDirName) | ||
| db, err = keyring.Open(keyring.Config{ | ||
| AllowedBackends: []keyring.BackendType{keyring.FileBackend}, | ||
| ServiceName: serviceName, | ||
| FileDir: fileDir, | ||
| FilePasswordFunc: newRealPrompt(fileDir, userInput), | ||
| }) | ||
| case sdkkeyring.BackendOS: | ||
| db, err = keyring.Open(keyring.Config{ | ||
| ServiceName: serviceName, | ||
| FileDir: rootDir, | ||
| KeychainTrustApplication: true, | ||
| FilePasswordFunc: newRealPrompt(rootDir, userInput), | ||
| }) | ||
| case sdkkeyring.BackendKWallet: | ||
| db, err = keyring.Open(keyring.Config{ | ||
| AllowedBackends: []keyring.BackendType{keyring.KWalletBackend}, | ||
| ServiceName: "kdewallet", | ||
| KWalletAppID: serviceName, | ||
| KWalletFolder: "", | ||
| }) | ||
| case sdkkeyring.BackendPass: | ||
| prefix := fmt.Sprintf(passKeyringPrefix, serviceName) | ||
| db, err = keyring.Open(keyring.Config{ | ||
| AllowedBackends: []keyring.BackendType{keyring.PassBackend}, | ||
| ServiceName: serviceName, | ||
| PassPrefix: prefix, | ||
| }) | ||
| default: | ||
| return nil, errorsmod.Wrap(sdkkeyring.ErrUnknownBacked, backend) | ||
| } | ||
|
|
||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| return newKeystore(db, backend), nil | ||
| } | ||
|
|
||
| var _ Keyring = keystore{} | ||
|
|
||
| type keystore struct { | ||
| db keyring.Keyring | ||
| backend string | ||
| } | ||
|
|
||
| func newKeystore(kr keyring.Keyring, backend string) keystore { | ||
| return keystore{ | ||
| db: kr, | ||
| backend: backend, | ||
| } | ||
| } | ||
|
|
||
| func (ks keystore) Get(name string) ([]byte, error) { | ||
| item, err := ks.db.Get(name) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| return item.Data, nil | ||
| } | ||
|
|
||
| func (ks keystore) Set(name string, secret []byte) error { | ||
| return ks.db.Set(keyring.Item{ | ||
| Key: name, | ||
| Data: secret, | ||
| Label: name, | ||
| }) | ||
| } | ||
|
|
||
| func newRealPrompt(dir string, buf io.Reader) func(string) (string, error) { | ||
| return func(prompt string) (string, error) { | ||
| keyhashStored := false | ||
| keyhashFilePath := filepath.Join(dir, "keyhash") | ||
|
|
||
| var keyhash []byte | ||
|
|
||
| _, err := os.Stat(keyhashFilePath) | ||
|
|
||
| switch { | ||
| case err == nil: | ||
| keyhash, err = os.ReadFile(keyhashFilePath) | ||
| if err != nil { | ||
| return "", errorsmod.Wrap(err, fmt.Sprintf("failed to read %s", keyhashFilePath)) | ||
| } | ||
|
|
||
| keyhashStored = true | ||
|
|
||
| case os.IsNotExist(err): | ||
| keyhashStored = false | ||
|
|
||
| default: | ||
| return "", errorsmod.Wrap(err, fmt.Sprintf("failed to open %s", keyhashFilePath)) | ||
| } | ||
|
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||
| failureCounter := 0 | ||
|
|
||
| for { | ||
| failureCounter++ | ||
| if failureCounter > maxPassphraseEntryAttempts { | ||
| return "", sdkkeyring.ErrMaxPassPhraseAttempts | ||
| } | ||
|
|
||
| buf := bufio.NewReader(buf) | ||
| pass, err := input.GetPassword(fmt.Sprintf("Enter keyring passphrase (attempt %d/%d):", failureCounter, maxPassphraseEntryAttempts), buf) | ||
| if err != nil { | ||
| // NOTE: LGTM.io reports a false positive alert that states we are printing the password, | ||
| // but we only log the error. | ||
| // | ||
| // lgtm [go/clear-text-logging] | ||
| fmt.Fprintln(os.Stderr, err) | ||
| continue | ||
| } | ||
|
|
||
| if keyhashStored { | ||
| if err := bcrypt.CompareHashAndPassword(keyhash, []byte(pass)); err != nil { | ||
| fmt.Fprintln(os.Stderr, "incorrect passphrase") | ||
| continue | ||
| } | ||
|
|
||
| return pass, nil | ||
| } | ||
|
|
||
| reEnteredPass, err := input.GetPassword("Re-enter keyring passphrase:", buf) | ||
| if err != nil { | ||
| // NOTE: LGTM.io reports a false positive alert that states we are printing the password, | ||
| // but we only log the error. | ||
| // | ||
| // lgtm [go/clear-text-logging] | ||
| fmt.Fprintln(os.Stderr, err) | ||
| continue | ||
| } | ||
|
|
||
| if pass != reEnteredPass { | ||
| fmt.Fprintln(os.Stderr, "passphrase do not match") | ||
| continue | ||
| } | ||
|
|
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| passwordHash, err := bcrypt.GenerateFromPassword([]byte(pass), 2) | ||
| if err != nil { | ||
| fmt.Fprintln(os.Stderr, err) | ||
| continue | ||
| } | ||
|
|
||
| if err := os.WriteFile(keyhashFilePath, passwordHash, 0o600); err != nil { | ||
| return "", err | ||
| } | ||
|
|
||
| return pass, nil | ||
| } | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,47 @@ | ||
| package keyring | ||
|
|
||
| import ( | ||
| "bytes" | ||
| "io" | ||
| "testing" | ||
|
|
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| "filippo.io/age" | ||
| "github.com/test-go/testify/require" | ||
|
|
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| "github.com/cosmos/cosmos-sdk/crypto/keyring" | ||
| ) | ||
|
|
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| func TestKeyring(t *testing.T) { | ||
| kr, err := New("cronosd", keyring.BackendTest, t.TempDir(), nil) | ||
| require.NoError(t, err) | ||
|
|
||
| identity, err := age.GenerateX25519Identity() | ||
| require.NoError(t, err) | ||
|
|
||
| var ciphertext []byte | ||
| { | ||
| dst := bytes.NewBuffer(nil) | ||
| writer, err := age.Encrypt(dst, identity.Recipient()) | ||
| require.NoError(t, err) | ||
| writer.Write([]byte("test")) | ||
| writer.Close() | ||
| ciphertext = dst.Bytes() | ||
| } | ||
|
|
||
| require.NoError(t, kr.Set("test", []byte(identity.String()))) | ||
|
|
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| secret, err := kr.Get("test") | ||
| require.NoError(t, err) | ||
|
|
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| identity, err = age.ParseX25519Identity(string(secret)) | ||
| require.NoError(t, err) | ||
|
|
||
| { | ||
| reader, err := age.Decrypt(bytes.NewReader(ciphertext), identity) | ||
| require.NoError(t, err) | ||
| bz, err := io.ReadAll(reader) | ||
| require.NoError(t, err) | ||
|
|
||
| require.Equal(t, []byte("test"), bz) | ||
| } | ||
| } |