133 lines
3.4 KiB
Go
133 lines
3.4 KiB
Go
package uri
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import (
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"bytes"
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"context"
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"encoding/json"
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"io"
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"net/http"
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"net/url"
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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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allowKnownTestSites bool
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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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keyPat = regexp.MustCompile(`\b[a-zA-Z]{1,10}:?\/\/[-.%\w{}]{1,50}:([-.%\S]{3,50})@[-.%\w\/:]+\b`)
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)
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type proxyRes struct {
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Verified bool `json:"verified"`
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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{"http"}
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}
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func allowlistedProtos(scheme string) bool {
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allowlisted := []string{"http", "https", "mongodb", "redis", "ftp"}
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for _, s := range allowlisted {
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if s == scheme {
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return true
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}
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}
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return false
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}
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// FromData will find and optionally verify URI 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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//Prevent SSRF "https://us-central1-ssrfproxy.cloudfunctions.net/ssrfproxy-6d96c399-74bb-4299-b49d-c1c870277eb9"
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//TODO add as config option
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//TODO extend to other http outbound calls in other areas of code
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ssrfProtectorURL := "https://us-central1-ssrfproxy.cloudfunctions.net/ssrfproxy-6d96c399-74bb-4299-b49d-c1c870277eb9"
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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 !s.allowKnownTestSites {
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if strings.Contains(match[0], "httpbin.org") {
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continue
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}
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if strings.Contains(match[0], "httpwatch.com") {
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continue
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}
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}
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urlMatch := match[0]
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password := match[1]
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// Skip findings where the password starts with a `$` - it's almost certainly a variable.
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if strings.HasPrefix(password, "$") {
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continue
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}
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parsedURL, err := url.Parse(urlMatch)
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if err != nil {
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continue
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}
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if _, ok := parsedURL.User.Password(); !ok {
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continue
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}
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if !allowlistedProtos(parsedURL.Scheme) {
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continue
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}
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redact := strings.TrimSpace(strings.Replace(urlMatch, password, strings.Repeat("*", len(password)), -1))
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s := detectors.Result{
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DetectorType: detectorspb.DetectorType_URI,
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Raw: []byte(urlMatch),
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Redacted: redact,
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}
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if verify {
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client := common.SaneHttpClient()
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// whitelist protocols
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// Assume a 200 response is a valid credential
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postValues := map[string]string{"protocol": parsedURL.Scheme, "credentialed_uri": urlMatch}
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jsonValue, _ := json.Marshal(postValues)
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req, err := http.NewRequestWithContext(ctx, "POST", ssrfProtectorURL, bytes.NewBuffer(jsonValue))
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if err != nil {
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continue
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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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result := proxyRes{}
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body, err := io.ReadAll(res.Body)
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res.Body.Close()
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if len(body) != 0 && err == nil {
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err = json.Unmarshal(body, &result)
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if err == nil && result.Verified {
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s.Verified = true
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}
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}
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}
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}
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if !s.Verified && detectors.IsKnownFalsePositive(string(s.Raw), detectors.DefaultFalsePositives, false) {
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continue
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}
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results = append(results, s)
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}
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return detectors.CleanResults(results), nil
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}
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