mirror of
https://github.com/trufflesecurity/trufflehog.git
synced 2024-09-20 14:42:03 +00:00
89 lines
2.7 KiB
Go
89 lines
2.7 KiB
Go
package facebookoauth
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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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"regexp"
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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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// 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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apiIdPat = regexp.MustCompile(detectors.PrefixRegex([]string{"facebook"}) + `\b([0-9]{15,18})\b`) // not actually sure of the upper bound
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apiSecretPat = regexp.MustCompile(detectors.PrefixRegex([]string{"facebook"}) + `\b([A-Za-z0-9]{32})\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{"facebook"}
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}
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// FromData will find and optionally verify FacebookOAuth 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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apiIdMatches := apiIdPat.FindAllStringSubmatch(dataStr, -1)
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apiSecretMatches := apiSecretPat.FindAllStringSubmatch(dataStr, -1)
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for _, apiIdMatch := range apiIdMatches {
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if len(apiIdMatch) != 2 {
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continue
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}
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apiIdRes := strings.TrimSpace(apiIdMatch[1])
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for _, apiSecretMatch := range apiSecretMatches {
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if len(apiSecretMatch) != 2 {
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continue
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}
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apiSecretRes := strings.TrimSpace(apiSecretMatch[1])
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s1 := detectors.Result{
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DetectorType: detectorspb.DetectorType_FacebookOAuth,
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Redacted: apiIdRes,
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Raw: []byte(apiSecretRes),
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RawV2: []byte(apiIdRes + apiSecretRes),
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}
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if verify {
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// thanks https://stackoverflow.com/questions/15621471/validate-a-facebook-app-id-and-app-secret
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// https://stackoverflow.com/questions/24401241/how-to-get-a-facebook-access-token-using-appid-and-app-secret-without-any-login
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req, err := http.NewRequestWithContext(ctx, "GET", fmt.Sprintf("https://graph.facebook.com/me?access_token=%s|%s", apiIdRes, apiSecretRes), nil)
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if err != nil {
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continue
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}
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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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} else {
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if detectors.IsKnownFalsePositive(apiIdRes, 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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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_FacebookOAuth
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}
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