mirror of
https://github.com/trufflesecurity/trufflehog.git
synced 2024-09-21 07:01:56 +00:00
96 lines
2.6 KiB
Go
96 lines
2.6 KiB
Go
package github
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import (
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"context"
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"encoding/json"
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"fmt"
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"net/http"
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"regexp"
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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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"github.com/trufflesecurity/trufflehog/v3/pkg/common"
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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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// Oauth token
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// https://developer.github.com/v3/#oauth2-token-sent-in-a-header
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// Token type list:
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// https://github.blog/2021-04-05-behind-githubs-new-authentication-token-formats/
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keyPat = regexp.MustCompile(`\b((?:ghp|gho|ghu|ghs|ghr)_[a-zA-Z0-9]{36,255}\b)`)
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//TODO: Oauth2 client_id and client_secret
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// https://developer.github.com/v3/#oauth2-keysecret
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)
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// TODO: Add secret context?? Information about access, ownership etc
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type userRes struct {
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Login string `json:"login"`
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Type string `json:"type"`
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SiteAdmin bool `json:"site_admin"`
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Name string `json:"name"`
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Company string `json:"company"`
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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{"ghp_", "gho_", "ghu_", "ghs_", "ghr_"}
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}
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// FromData will find and optionally verify GitHub 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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for _, match := range matches {
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// First match is entire regex, second is the first group.
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if len(match) != 2 {
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continue
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}
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token := match[1]
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s := detectors.Result{
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DetectorType: detectorspb.DetectorType_Github,
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Raw: []byte(token),
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}
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if verify {
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client := common.SaneHttpClient()
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// https://developer.github.com/v3/users/#get-the-authenticated-user
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req, _ := http.NewRequestWithContext(ctx, "GET", "https://api.github.com/user", nil)
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req.Header.Add("Content-Type", "application/json; charset=utf-8")
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req.Header.Add("Authorization", fmt.Sprintf("token %s", token))
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res, err := client.Do(req)
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if err != nil {
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break
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}
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defer res.Body.Close()
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if res.StatusCode >= 200 && res.StatusCode < 300 {
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var userResponse userRes
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err = json.NewDecoder(res.Body).Decode(&userResponse)
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if err == nil {
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s.Verified = true
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}
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}
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}
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if !s.Verified {
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if detectors.IsKnownFalsePositive(string(s.Raw), detectors.DefaultFalsePositives, true) {
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continue
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}
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}
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results = append(results, s)
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}
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return
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}
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