mirror of
https://github.com/trufflesecurity/trufflehog.git
synced 2024-09-20 22:51:55 +00:00
87 lines
2.5 KiB
Go
87 lines
2.5 KiB
Go
package azure
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import (
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"context"
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"fmt"
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"regexp"
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"strings"
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"github.com/Azure/go-autorest/autorest/azure/auth"
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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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func mustFmtPat(id, pat string) *regexp.Regexp {
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combinedID := strings.ReplaceAll(id, "_", "") + "|" + id
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return regexp.MustCompile(fmt.Sprintf(pat, combinedID))
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}
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var (
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// TODO: Azure storage access keys and investigate other types of creds.
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// Azure App Oauth
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idPatFmt = `(?i)(%s).{0,20}([a-f0-9]{8}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{12})`
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clientIDPat = mustFmtPat("client_id", idPatFmt)
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tenantIDPat = mustFmtPat("tenant_id", idPatFmt)
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// TODO: support old patterns
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secretPatFmt = `(?i)(%s).{0,20}([a-z0-9_\.\-~]{34})`
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clientSecretPat = mustFmtPat("client_secret", secretPatFmt)
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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{"azure"}
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}
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// FromData will find and optionally verify Azure 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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clientSecretMatches := clientSecretPat.FindAllStringSubmatch(dataStr, -1)
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for _, clientSecret := range clientSecretMatches {
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tenantIDMatches := tenantIDPat.FindAllStringSubmatch(dataStr, -1)
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for _, tenantID := range tenantIDMatches {
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clientIDMatches := clientIDPat.FindAllStringSubmatch(dataStr, -1)
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for _, clientID := range clientIDMatches {
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s := detectors.Result{
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DetectorType: detectorspb.DetectorType_Azure,
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Raw: []byte(clientSecret[2]),
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Redacted: clientID[2],
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}
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if verify {
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cred := auth.NewClientCredentialsConfig(clientID[2], clientSecret[2], tenantID[2])
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token, err := cred.ServicePrincipalToken()
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if err != nil {
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continue
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}
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err = token.Refresh()
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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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if !s.Verified {
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if detectors.IsKnownFalsePositive(s.Redacted, detectors.DefaultFalsePositives, true) {
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continue
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}
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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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}
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}
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return detectors.CleanResults(results), nil
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}
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