mirror of
https://github.com/trufflesecurity/trufflehog.git
synced 2024-09-20 14:42:03 +00:00
120 lines
3.3 KiB
Go
120 lines
3.3 KiB
Go
package twitch
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import (
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"context"
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"fmt"
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"net/http"
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"net/url"
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"regexp"
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"strconv"
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"strings"
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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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client *http.Client
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}
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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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const verifyURL = "https://id.twitch.tv/oauth2/token"
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var (
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defaultClient = 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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keyPat = regexp.MustCompile(detectors.PrefixRegex([]string{"twitch"}) + `\b([0-9a-z]{30})\b`)
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idPat = regexp.MustCompile(detectors.PrefixRegex([]string{"twitch"}) + `\b([0-9a-z]{30})\b`)
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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{"twitch"}
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}
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// FromData will find and optionally verify Twitch 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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idMatches := idPat.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 _, idMatch := range idMatches {
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if len(idMatch) != 2 {
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continue
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}
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resIdMatch := strings.TrimSpace(idMatch[1])
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s1 := detectors.Result{
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DetectorType: detectorspb.DetectorType_Twitch,
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Raw: []byte(resMatch),
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}
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if verify {
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client := s.getClient()
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isVerified, verificationErr := verifyTwitch(ctx, client, resMatch, resIdMatch)
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s1.Verified = isVerified
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s1.VerificationError = verificationErr
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}
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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 !s1.Verified && detectors.IsKnownFalsePositive(resMatch, detectors.DefaultFalsePositives, true) {
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continue
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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) getClient() *http.Client {
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if s.client != nil {
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return s.client
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}
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return defaultClient
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}
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func verifyTwitch(ctx context.Context, client *http.Client, resMatch string, resIdMatch string) (bool, error) {
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data := url.Values{}
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data.Set("client_id", resIdMatch)
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data.Set("client_secret", resMatch)
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data.Set("grant_type", "client_credentials")
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encodedData := data.Encode()
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req, err := http.NewRequestWithContext(ctx, http.MethodPost, verifyURL, strings.NewReader(encodedData))
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if err != nil {
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return false, err
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}
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req.Header.Add("Content-Type", "application/x-www-form-urlencoded")
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req.Header.Add("Content-Length", strconv.Itoa(len(data.Encode())))
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res, err := client.Do(req)
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if err != nil {
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return false, err
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}
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defer res.Body.Close()
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switch res.StatusCode {
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case http.StatusOK:
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return true, nil
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case http.StatusBadRequest, http.StatusForbidden:
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return false, nil
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default:
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return false, fmt.Errorf("unexpected http response status %d", res.StatusCode)
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}
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}
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func (s Scanner) Type() detectorspb.DetectorType {
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return detectorspb.DetectorType_Twitch
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}
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