mirror of
https://github.com/trufflesecurity/trufflehog.git
synced 2024-11-14 17:07:31 +00:00
118 lines
3.3 KiB
Go
118 lines
3.3 KiB
Go
package gengo
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import (
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"context"
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"crypto/hmac"
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"crypto/sha1"
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"encoding/hex"
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"encoding/json"
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"fmt"
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"io/ioutil"
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"strconv"
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"time"
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// "log"
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"regexp"
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"strings"
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"net/http"
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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 boundry characters such as below to reduce false positives
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//Removed bounds since there are some cases where the start and end of the token is a special character
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keyPat = regexp.MustCompile(detectors.PrefixRegex([]string{"gengo"}) + `([ ]{0,1}[0-9a-zA-Z\[\]\-\(\)\{\}|_^@$=~]{64}[ \r\n]{1})`)
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secretPat = regexp.MustCompile(detectors.PrefixRegex([]string{"gengo"}) + `([ ]{0,1}[0-9a-zA-Z\[\]\-\(\)\{\}|_^@$=~]{64}[ \r\n]{1})`)
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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{"gengo"}
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}
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// FromData will find and optionally verify Gengo 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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secretMatches := secretPat.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 _, secretMatch := range secretMatches {
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if len(secretMatch) != 2 {
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continue
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}
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resSecretMatch := strings.TrimSpace(secretMatch[1])
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s1 := detectors.Result{
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DetectorType: detectorspb.DetectorType_Gengo,
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Raw: []byte(resSecretMatch),
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}
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if verify {
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timestamp := strconv.FormatInt(time.Now().Unix(), 10)
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signature := getGengoSignature(timestamp, resSecretMatch)
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req, _ := http.NewRequestWithContext(ctx, "GET", fmt.Sprintf("https://api.gengo.com/v2/account/me?ts=%s&api_key=%s&api_sig=%s", timestamp, resMatch, signature), nil)
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req.Header.Add("Accept", "application/json")
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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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body, errBody := ioutil.ReadAll(res.Body)
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if errBody == nil {
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var response Response
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json.Unmarshal(body, &response)
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if res.StatusCode >= 200 && res.StatusCode < 300 && response.OpStat == "ok" {
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s1.Verified = true
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} else {
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//This function will check false positives for common test words, but also it will make sure the key appears 'random' enough to be a real key
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if detectors.IsKnownFalsePositive(resMatch, detectors.DefaultFalsePositives, true) {
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continue
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}
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if detectors.IsKnownFalsePositive(resSecretMatch, detectors.DefaultFalsePositives, true) {
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continue
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}
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}
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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 detectors.CleanResults(results), nil
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}
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type Response struct {
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OpStat string `json:"opstat"`
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}
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func getGengoSignature(timeStamp string, secret string) string {
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mac := hmac.New(sha1.New, []byte(secret))
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mac.Write([]byte(timeStamp))
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macsum := mac.Sum(nil)
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return hex.EncodeToString(macsum)
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}
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