Amaan Ullah
0fa069c12f
* enable errcheck and staticcheck for golangci-lint v2 and resolve all issues * skip lint on intentional reference of deprecated DetectorType values
112 lines
3.2 KiB
Go
112 lines
3.2 KiB
Go
package githubapp
|
|
|
|
import (
|
|
"context"
|
|
"fmt"
|
|
"net/http"
|
|
"strings"
|
|
"time"
|
|
|
|
"github.com/golang-jwt/jwt/v5"
|
|
regexp "github.com/wasilibs/go-re2"
|
|
|
|
"github.com/trufflesecurity/trufflehog/v3/pkg/common"
|
|
"github.com/trufflesecurity/trufflehog/v3/pkg/detectors"
|
|
"github.com/trufflesecurity/trufflehog/v3/pkg/pb/detector_typepb"
|
|
)
|
|
|
|
type Scanner struct {
|
|
detectors.DefaultMultiPartCredentialProvider
|
|
}
|
|
|
|
// Ensure the Scanner satisfies the interface at compile time.
|
|
var _ detectors.Detector = (*Scanner)(nil)
|
|
|
|
var (
|
|
client = common.SaneHttpClient()
|
|
|
|
// Make sure that your group is surrounded in boundary characters such as below to reduce false positives.
|
|
appPat = regexp.MustCompile(detectors.PrefixRegex([]string{"github"}) + `\b([0-9]{6})\b`)
|
|
|
|
keyPat = regexp.MustCompile(detectors.PrefixRegex([]string{"github"}) + `(-----BEGIN RSA PRIVATE KEY-----\s[A-Za-z0-9+\/\s]*\s-----END RSA PRIVATE KEY-----)`)
|
|
)
|
|
|
|
// Keywords are used for efficiently pre-filtering chunks.
|
|
// Use identifiers in the secret preferably, or the provider name.
|
|
func (s Scanner) Keywords() []string {
|
|
return []string{"github"}
|
|
}
|
|
|
|
// FromData will find and optionally verify GitHubApp secrets in a given set of bytes.
|
|
func (s Scanner) FromData(ctx context.Context, verify bool, data []byte) (results []detectors.Result, err error) {
|
|
dataStr := string(data)
|
|
matches := keyPat.FindAllStringSubmatch(dataStr, -1)
|
|
appMatches := appPat.FindAllStringSubmatch(dataStr, -1)
|
|
|
|
for _, match := range matches {
|
|
|
|
resMatch := strings.TrimSpace(match[1])
|
|
for _, appMatch := range appMatches {
|
|
appResMatch := strings.TrimSpace(appMatch[1])
|
|
s1 := detectors.Result{
|
|
DetectorType: detector_typepb.DetectorType_GitHubApp,
|
|
Raw: []byte(resMatch),
|
|
SecretParts: map[string]string{"key": resMatch},
|
|
}
|
|
s1.ExtraData = map[string]string{
|
|
"rotation_guide": "https://howtorotate.com/docs/tutorials/github/",
|
|
}
|
|
|
|
if verify {
|
|
signKey, err := jwt.ParseRSAPrivateKeyFromPEM([]byte(resMatch))
|
|
if err != nil {
|
|
continue
|
|
}
|
|
// issued at time
|
|
iat := time.Now().Add(-60 * time.Second)
|
|
exp := time.Now().Add(9 * 60 * time.Second)
|
|
|
|
iss := appResMatch
|
|
token := jwt.New(jwt.SigningMethodRS256)
|
|
claims := token.Claims.(jwt.MapClaims)
|
|
claims["iat"] = iat.Unix()
|
|
claims["exp"] = exp.Unix()
|
|
claims["iss"] = iss
|
|
tokenString, err := token.SignedString(signKey)
|
|
if err != nil {
|
|
continue
|
|
}
|
|
// end get token
|
|
|
|
req, err := http.NewRequestWithContext(ctx, "GET", "https://api.github.com/app", nil)
|
|
if err != nil {
|
|
continue
|
|
}
|
|
req.Header.Add("Accept", "application/vnd.github.v3+json")
|
|
req.Header.Add("Authorization", fmt.Sprintf("Bearer %s", tokenString))
|
|
res, err := client.Do(req)
|
|
if err == nil {
|
|
defer func() { _ = res.Body.Close() }()
|
|
if res.StatusCode >= 200 && res.StatusCode < 300 {
|
|
s1.Verified = true
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
results = append(results, s1)
|
|
}
|
|
|
|
}
|
|
|
|
return results, nil
|
|
}
|
|
|
|
func (s Scanner) Type() detector_typepb.DetectorType {
|
|
return detector_typepb.DetectorType_GitHubApp
|
|
}
|
|
|
|
func (s Scanner) Description() string {
|
|
return "GitHub Apps allow you to automate and improve your workflow. GitHub App keys can be used to authenticate and interact with the GitHub API on behalf of the app."
|
|
}
|