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Adds: support for harbor registry vulnerability fetching (#1015)
* Adds: support for harbor vuln fetching * code nits: renamed env variables Co-authored-by: Suvarna Rokade <[email protected]>
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Original file line number | Diff line number | Diff line change |
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/* | ||
Copyright (C) 2020 Accurics, 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. | ||
*/ | ||
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package vulnerability | ||
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import ( | ||
"crypto/tls" | ||
"crypto/x509" | ||
"encoding/json" | ||
"fmt" | ||
"io/ioutil" | ||
"net/http" | ||
"os" | ||
"strings" | ||
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"github.com/accurics/terrascan/pkg/iac-providers/output" | ||
"go.uber.org/zap" | ||
) | ||
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const ( | ||
registryUsername = "HARBOR_REGISTRY_USERNAME" | ||
registryPassword = "HARBOR_REGISTRY_PASSWORD" | ||
vulnerabilityHeader = "X-Accept-Vulnerabilities" | ||
vulnerabilityHeaderValue = "application/vnd.scanner.adapter.vuln.report.harbor+json; version=1.0" | ||
skipTLSVerify = "HARBOR_SKIP_TLS" | ||
certificate = "HARBOR_REGISTRY_CACERT" | ||
registryDomain = "HARBOR_REGISTRY_DOMAIN" | ||
) | ||
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//ServerCaller interface with client methods | ||
type ServerCaller interface { | ||
Do(req *http.Request) (*http.Response, error) | ||
} | ||
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// harborScanner holds external harbor registry methods | ||
type harborScanner interface { | ||
prepareRequest(serverURL string) (*http.Request, error) | ||
sendRequest(caller ServerCaller, req *http.Request) ([]byte, error) | ||
getClient() *http.Client | ||
} | ||
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//scanner implementor for harborScanner interface | ||
type hscanner struct{} | ||
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//Harbor Harbor container registry | ||
type Harbor struct { | ||
scanner harborScanner | ||
} | ||
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func init() { | ||
RegisterContainerRegistry("harbor", &Harbor{ | ||
scanner: hscanner{}, | ||
}) | ||
} | ||
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//prepareRequest prepares http request | ||
func (hscanner) prepareRequest(serverURL string) (*http.Request, error) { | ||
username := os.Getenv(registryUsername) | ||
password := os.Getenv(registryPassword) | ||
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if username == "" || password == "" { | ||
errorMsg := fmt.Errorf("incomplete authentication details") | ||
zap.S().Error(errorMsg) | ||
return nil, errorMsg | ||
} | ||
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req, err := http.NewRequest(http.MethodGet, serverURL, nil) | ||
if err != nil { | ||
errorMsg := fmt.Errorf("error creating harbor server request: %v", err) | ||
zap.S().Error(errorMsg) | ||
return nil, errorMsg | ||
} | ||
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req.Header.Add("accept", "application/json") | ||
req.Header.Add(vulnerabilityHeader, vulnerabilityHeaderValue) | ||
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req.SetBasicAuth(username, password) | ||
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return req, nil | ||
} | ||
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//getClient prepares http client | ||
func (hscanner) getClient() *http.Client { | ||
tlsConfig := &tls.Config{} | ||
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skipTLS := os.Getenv(skipTLSVerify) | ||
if skipTLS != "" { | ||
if strings.EqualFold(skipTLS, "true") { | ||
tlsConfig.InsecureSkipVerify = true | ||
} | ||
} | ||
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cert := os.Getenv(certificate) | ||
if cert != "" { | ||
caCert, err := ioutil.ReadFile(cert) | ||
if err != nil { | ||
errorMsg := fmt.Errorf("client certificate not found") | ||
zap.S().Error(errorMsg) | ||
} else { | ||
caCertPool := x509.NewCertPool() | ||
caCertPool.AppendCertsFromPEM(caCert) | ||
tlsConfig.RootCAs = caCertPool | ||
} | ||
} | ||
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return &http.Client{ | ||
Transport: &http.Transport{ | ||
TLSClientConfig: tlsConfig, | ||
}, | ||
} | ||
} | ||
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//sendRequest sends request to harbor | ||
func (hscanner) sendRequest(caller ServerCaller, req *http.Request) ([]byte, error) { | ||
res, err := caller.Do(req) | ||
if err != nil { | ||
errorMsg := fmt.Errorf("error calling harbor server: %v", err) | ||
zap.S().Error(errorMsg) | ||
return nil, errorMsg | ||
} | ||
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defer res.Body.Close() | ||
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body, err := ioutil.ReadAll(res.Body) | ||
if err != nil { | ||
errorMsg := fmt.Errorf("error reading response from harbor: %v", err) | ||
zap.S().Error(errorMsg) | ||
return nil, err | ||
} | ||
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if res.StatusCode != http.StatusOK { | ||
errMsg := fmt.Errorf(string(body)) | ||
return nil, errMsg | ||
} | ||
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return body, nil | ||
} | ||
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//CheckRegistry verify provided image belongs to harbor registry | ||
func (h *Harbor) checkRegistry(image string) bool { | ||
reg := os.Getenv(registryDomain) | ||
host := GetDomain(image) | ||
return reg != "" && strings.EqualFold(reg, host) | ||
} | ||
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// GetVulnerabilities - get vulnerabilities from harbor registry | ||
func (h *Harbor) getVulnerabilities(container output.ContainerDetails, options map[string]interface{}) (vulnerabilities []output.Vulnerability) { | ||
results, err := h.ScanImage(container.Image) | ||
if err != nil { | ||
zap.S().Errorf("error finding vulnerabilities for image %s : %v", container.Image, err) | ||
return | ||
} | ||
if temp, ok := results[vulnerabilityHeaderValue]; ok { | ||
if tempData, ok := temp.(map[string]interface{}); ok { | ||
if tempResults, ok := tempData["vulnerabilities"]; ok { | ||
mapResults, _ := tempResults.([]interface{}) | ||
for _, result := range mapResults { | ||
vulnerability := output.Vulnerability{} | ||
if data, ok := result.(map[string]interface{}); ok { | ||
vulnerability.PrepareFromHarborImageScan(data) | ||
vulnerabilities = append(vulnerabilities, vulnerability) | ||
} | ||
} | ||
} | ||
} | ||
} | ||
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return | ||
} | ||
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// ScanImage get the image scan result from harbor registry | ||
func (h *Harbor) ScanImage(image string) (result map[string]interface{}, err error) { | ||
imageDetails := ImageDetails{} | ||
imageDetails = GetImageDetails(image, imageDetails) | ||
if imageDetails.Tag == "" { | ||
imageDetails.Tag = defaultTagValue | ||
} | ||
reference := imageDetails.Tag | ||
if imageDetails.Digest != "" { | ||
reference = imageDetails.Digest | ||
} | ||
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project, repository := getProjectNameAndRepository(imageDetails.Repository) | ||
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serverURL := fmt.Sprintf("https://%s/api/v2.0/projects/%s/repositories/%s/artifacts/%s/additions/vulnerabilities", | ||
imageDetails.Registry, | ||
project, | ||
repository, | ||
reference) | ||
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client := h.scanner.getClient() | ||
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req, err := h.scanner.prepareRequest(serverURL) | ||
if err != nil { | ||
return nil, err | ||
} | ||
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data, err := h.scanner.sendRequest(client, req) | ||
if err != nil { | ||
return nil, err | ||
} | ||
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if err := json.Unmarshal(data, &result); err != nil { | ||
errorMsg := fmt.Errorf("error unmarshaling harbor server response : %v", err) | ||
zap.S().Error(errorMsg) | ||
return nil, errorMsg | ||
} | ||
return result, nil | ||
} | ||
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//getProjectNameAndRepository fetch project and repo name | ||
func getProjectNameAndRepository(name string) (string, string) { | ||
parts := strings.Split(name, "/") | ||
if len(parts) >= 2 { | ||
return parts[0], parts[1] | ||
} | ||
return "", "" | ||
} |
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