trufflesteeeveandahmed
114f4b6989
* Add Type() to detector interface The goal here is to allow the detector type information to be used without the need for reflection. This could possibly allow us to more easily inject information into detectors or filter them out if necessary. Co-authored-by: ahmed <[email protected]> * remove test detector --------- Co-authored-by: ahmed <[email protected]>
109 lines
2.9 KiB
Go
109 lines
2.9 KiB
Go
package githubapp
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import (
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"context"
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// b64 "encoding/base64"
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"fmt"
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"net/http"
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"regexp"
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"strings"
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"time"
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"github.com/golang-jwt/jwt"
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"github.com/trufflesecurity/trufflehog/v3/pkg/common"
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"github.com/trufflesecurity/trufflehog/v3/pkg/detectors"
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"github.com/trufflesecurity/trufflehog/v3/pkg/pb/detectorspb"
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)
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type Scanner struct{}
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// Ensure the Scanner satisfies the interface at compile time.
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var _ detectors.Detector = (*Scanner)(nil)
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var (
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client = common.SaneHttpClient()
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// Make sure that your group is surrounded in boundary characters such as below to reduce false positives.
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appPat = regexp.MustCompile(detectors.PrefixRegex([]string{"github"}) + `\b([0-9]{6})\b`)
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keyPat = regexp.MustCompile(detectors.PrefixRegex([]string{"github"}) + `(-----BEGIN RSA PRIVATE KEY-----\s[A-Za-z0-9+\/\s]*\s-----END RSA PRIVATE KEY-----)`)
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)
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// Keywords are used for efficiently pre-filtering chunks.
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// Use identifiers in the secret preferably, or the provider name.
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func (s Scanner) Keywords() []string {
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return []string{"github"}
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}
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// FromData will find and optionally verify GitHubApp secrets in a given set of bytes.
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func (s Scanner) FromData(ctx context.Context, verify bool, data []byte) (results []detectors.Result, err error) {
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dataStr := string(data)
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matches := keyPat.FindAllStringSubmatch(dataStr, -1)
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appMatches := appPat.FindAllStringSubmatch(dataStr, -1)
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for _, match := range matches {
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if len(match) != 2 {
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continue
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}
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resMatch := strings.TrimSpace(match[1])
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for _, appMatch := range appMatches {
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if len(appMatch) != 2 {
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continue
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}
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appResMatch := strings.TrimSpace(appMatch[1])
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s1 := detectors.Result{
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DetectorType: detectorspb.DetectorType_GitHubApp,
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Raw: []byte(resMatch),
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}
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if verify {
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signKey, err := jwt.ParseRSAPrivateKeyFromPEM([]byte(resMatch))
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if err != nil {
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continue
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}
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// issued at time
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iat := time.Now().Add(-60 * time.Second)
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exp := time.Now().Add(9 * 60 * time.Second)
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iss := appResMatch
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token := jwt.New(jwt.SigningMethodRS256)
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claims := token.Claims.(jwt.MapClaims)
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claims["iat"] = iat.Unix()
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claims["exp"] = exp.Unix()
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claims["iss"] = iss
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tokenString, err := token.SignedString(signKey)
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if err != nil {
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continue
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}
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// end get token
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req, err := http.NewRequestWithContext(ctx, "GET", "https://api.github.com/app", nil)
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if err != nil {
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continue
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}
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req.Header.Add("Accept", "application/vnd.github.v3+json")
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req.Header.Add("Authorization", fmt.Sprintf("Bearer %s", tokenString))
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res, err := client.Do(req)
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if err == nil {
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defer res.Body.Close()
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if res.StatusCode >= 200 && res.StatusCode < 300 {
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s1.Verified = true
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}
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}
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}
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results = append(results, s1)
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}
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}
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return results, nil
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}
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func (s Scanner) Type() detectorspb.DetectorType {
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return detectorspb.DetectorType_GitHubApp
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}
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