ahrav
e44802a31d
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* update detectors to use go-re regex library replacement * update go mod and sum * add tests with invalid utf-8 * revert
113 lines
3.2 KiB
Go
113 lines
3.2 KiB
Go
package microsoftteamswebhook
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import (
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"context"
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"fmt"
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regexp "github.com/wasilibs/go-re2"
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"io"
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"net/http"
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"strings"
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"time"
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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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var (
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defaultClient = common.SaneHttpClientTimeOut(5 * time.Second)
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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(`(https:\/\/[a-zA-Z-0-9]+\.webhook\.office\.com\/webhookb2\/[a-zA-Z-0-9]{8}-[a-zA-Z-0-9]{4}-[a-zA-Z-0-9]{4}-[a-zA-Z-0-9]{4}-[a-zA-Z-0-9]{12}\@[a-zA-Z-0-9]{8}-[a-zA-Z-0-9]{4}-[a-zA-Z-0-9]{4}-[a-zA-Z-0-9]{4}-[a-zA-Z-0-9]{12}\/IncomingWebhook\/[a-zA-Z-0-9]{32}\/[a-zA-Z-0-9]{8}-[a-zA-Z-0-9]{4}-[a-zA-Z-0-9]{4}-[a-zA-Z-0-9]{4}-[a-zA-Z-0-9]{12})`)
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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{"webhook.office.com"}
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}
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// FromData will find and optionally verify MicrosoftTeamsWebhook 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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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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s1 := detectors.Result{
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DetectorType: detectorspb.DetectorType_MicrosoftTeamsWebhook,
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Raw: []byte(resMatch),
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}
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s1.ExtraData = map[string]string{
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"rotation_guide": "https://howtorotate.com/docs/tutorials/ms/",
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}
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if verify {
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client := s.client
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if client == nil {
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client = defaultClient
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}
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isVerified, verificationErr := verifyWebhook(ctx, client, resMatch)
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s1.Verified = isVerified
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s1.SetVerificationError(verificationErr, resMatch)
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}
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if !s1.Verified && detectors.IsKnownFalsePositive(resMatch, detectors.DefaultFalsePositives, false) {
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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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return results, nil
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}
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func verifyWebhook(ctx context.Context, client *http.Client, webhookURL string) (bool, error) {
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payload := strings.NewReader(`{'text':''}`)
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req, err := http.NewRequestWithContext(ctx, "POST", webhookURL, payload)
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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/json")
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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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body, err := io.ReadAll(res.Body)
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if err != nil {
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return false, err
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}
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switch {
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case res.StatusCode == http.StatusBadRequest:
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if strings.Contains(string(body), "Text is required") {
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return true, nil
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}
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return false, fmt.Errorf("unexpected response body: %s", string(body))
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case res.StatusCode < 200 || res.StatusCode >= 500:
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return false, fmt.Errorf("unexpected HTTP response status: %d", res.StatusCode)
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default:
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return false, nil
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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_MicrosoftTeamsWebhook
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}
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