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added azurefunctionkey detector (#2337)
* added azurefunctionkey detector * update raw field to include url * clean up and added prefix on key pattern * update bench script * update imports, snifftest, and gen proto --------- Co-authored-by: Dustin Decker <dustin@trufflesec.com>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,13 +1,15 @@ | ||
| #!/usr/bin/env bash | ||
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| REPO_ARRAY=( | ||
| "https://github.com/Netflix/Hystrix.git" | ||
| # "https://github.com/Netflix/Hystrix.git" | ||
| # "https://github.com/facebook/flow.git" | ||
| # "https://github.com/Netflix/vizceral.git" | ||
| # "https://github.com/Netflix/metaflow.git" | ||
| # "https://github.com/Netflix/dgs-framework.git" | ||
| # "https://github.com/Netflix/vector.git" | ||
| # "https://github.com/expressjs/express.git" | ||
| "https://github.com/Azure/azure-sdk-for-net" | ||
| "https://github.com/Azure/azure-cli" | ||
| ) | ||
| REPOS=$(printf "%s," "${REPO_ARRAY[@]}" | cut -d "," -f 1-${#REPO_ARRAY[@]}) | ||
| go run hack/snifftest/main.go scan --exclude privatekey --exclude uri --exclude github_old --repo "$REPOS" --detector all --print --fail-threshold 99 |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,89 @@ | ||
| package azurefunctionkey | ||
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| import ( | ||
| "context" | ||
| "fmt" | ||
| "net/http" | ||
| "regexp" | ||
| "strings" | ||
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| "github.com/trufflesecurity/trufflehog/v3/pkg/common" | ||
| "github.com/trufflesecurity/trufflehog/v3/pkg/detectors" | ||
| "github.com/trufflesecurity/trufflehog/v3/pkg/pb/detectorspb" | ||
| ) | ||
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| type Scanner struct { | ||
| client *http.Client | ||
| } | ||
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| // Ensure the Scanner satisfies the interface at compile time. | ||
| var _ detectors.Detector = (*Scanner)(nil) | ||
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| var ( | ||
| defaultClient = common.SaneHttpClient() | ||
| // Make sure that your group is surrounded in boundary characters such as below to reduce false positives. | ||
| keyPat = regexp.MustCompile(detectors.PrefixRegex([]string{"azure"}) + `\b([a-zA-Z0-9_-]{20,56})\b={0,2}`) | ||
| azureUrlPat = regexp.MustCompile(`\bhttps:\/\/([a-zA-Z0-9-]{2,30})\.azurewebsites\.net\/api\/([a-zA-Z0-9-]{2,30})\b`) | ||
| ) | ||
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| // Keywords are used for efficiently pre-filtering chunks. | ||
| // Use identifiers in the secret preferably, or the provider name. | ||
| func (s Scanner) Keywords() []string { | ||
| return []string{"azure"} | ||
| } | ||
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| // FromData will find and optionally verify azure secrets in a given set of bytes. | ||
| func (s Scanner) FromData(ctx context.Context, verify bool, data []byte) (results []detectors.Result, err error) { | ||
| dataStr := string(data) | ||
| matches := keyPat.FindAllStringSubmatch(dataStr, -1) | ||
| urlMatches := azureUrlPat.FindAllStringSubmatch(dataStr, -1) | ||
| for _, match := range matches { | ||
| resTrim := strings.Split(strings.TrimSpace(match[0]), " ") | ||
| resMatch := resTrim[len(resTrim)-1] | ||
| for _, urlMatch := range urlMatches { | ||
| resUrl := strings.TrimSpace(urlMatch[0]) | ||
| s1 := detectors.Result{ | ||
| DetectorType: detectorspb.DetectorType_AzureFunctionKey, | ||
| Raw: []byte(resMatch + resUrl), | ||
| } | ||
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| if verify { | ||
| client := s.client | ||
| if client == nil { | ||
| client = defaultClient | ||
| } | ||
| req, err := http.NewRequestWithContext(ctx, "GET", resUrl+"?code="+resMatch, nil) | ||
| if err != nil { | ||
| continue | ||
| } | ||
| res, err := client.Do(req) | ||
| if err == nil { | ||
| defer res.Body.Close() | ||
| if res.StatusCode >= 200 && res.StatusCode < 300 { | ||
| s1.Verified = true | ||
| } else if res.StatusCode == 401 { | ||
| // The secret is determinately not verified (nothing to do) | ||
| } else { | ||
| err = fmt.Errorf("unexpected HTTP response status %d", res.StatusCode) | ||
| s1.SetVerificationError(err, resMatch) | ||
| } | ||
| } else { | ||
| s1.SetVerificationError(err, resMatch) | ||
| } | ||
| } | ||
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| // This function will check false positives for common test words, but also it will make sure the key appears 'random' enough to be a real key. | ||
| if !s1.Verified && detectors.IsKnownFalsePositive(resMatch, detectors.DefaultFalsePositives, true) { | ||
| continue | ||
| } | ||
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| results = append(results, s1) | ||
| } | ||
| } | ||
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| return results, nil | ||
| } | ||
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| func (s Scanner) Type() detectorspb.DetectorType { | ||
| return detectorspb.DetectorType_AzureFunctionKey | ||
| } |
163 changes: 163 additions & 0 deletions
163
pkg/detectors/azurefunctionkey/azurefunctionkey_test.go
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,163 @@ | ||
| //go:build detectors | ||
| // +build detectors | ||
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| package azurefunctionkey | ||
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| import ( | ||
| "context" | ||
| "fmt" | ||
| "testing" | ||
| "time" | ||
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| "github.com/google/go-cmp/cmp" | ||
| "github.com/google/go-cmp/cmp/cmpopts" | ||
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| "github.com/trufflesecurity/trufflehog/v3/pkg/detectors" | ||
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| "github.com/trufflesecurity/trufflehog/v3/pkg/common" | ||
| "github.com/trufflesecurity/trufflehog/v3/pkg/pb/detectorspb" | ||
| ) | ||
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| func TestAzurefunctionkey_FromChunk(t *testing.T) { | ||
| ctx, cancel := context.WithTimeout(context.Background(), time.Second*5) | ||
| defer cancel() | ||
| testSecrets, err := common.GetSecret(ctx, "trufflehog-testing", "detectors5") | ||
| if err != nil { | ||
| t.Fatalf("could not get test secrets from GCP: %s", err) | ||
| } | ||
| secret := testSecrets.MustGetField("AZURE_FUNCTION_KEY") | ||
| inactiveSecret := testSecrets.MustGetField("AZURE_FUNCTION_KEY_INACTIVE") | ||
| url := testSecrets.MustGetField("AZURE_FUNCTION_URL") | ||
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| type args struct { | ||
| ctx context.Context | ||
| data []byte | ||
| verify bool | ||
| } | ||
| tests := []struct { | ||
| name string | ||
| s Scanner | ||
| args args | ||
| want []detectors.Result | ||
| wantErr bool | ||
| wantVerificationErr bool | ||
| }{ | ||
| { | ||
| name: "found, verified", | ||
| s: Scanner{}, | ||
| args: args{ | ||
| ctx: context.Background(), | ||
| data: []byte(fmt.Sprintf("You can find a azure secret %s azure url %s", secret, url)), | ||
| verify: true, | ||
| }, | ||
| want: []detectors.Result{ | ||
| { | ||
| DetectorType: detectorspb.DetectorType_AzureFunctionKey, | ||
| Verified: true, | ||
| }, | ||
| }, | ||
| wantErr: false, | ||
| wantVerificationErr: false, | ||
| }, | ||
| { | ||
| name: "found, unverified", | ||
| s: Scanner{}, | ||
| args: args{ | ||
| ctx: context.Background(), | ||
| data: []byte(fmt.Sprintf("You can find a azure secret %s azure url %s but not valid", inactiveSecret, url)), // the secret would satisfy the regex but not pass validation | ||
| verify: true, | ||
| }, | ||
| want: []detectors.Result{ | ||
| { | ||
| DetectorType: detectorspb.DetectorType_AzureFunctionKey, | ||
| Verified: false, | ||
| }, | ||
| }, | ||
| wantErr: false, | ||
| wantVerificationErr: false, | ||
| }, | ||
| { | ||
| name: "not found", | ||
| s: Scanner{}, | ||
| args: args{ | ||
| ctx: context.Background(), | ||
| data: []byte("You cannot find the secret within"), | ||
| verify: true, | ||
| }, | ||
| want: nil, | ||
| wantErr: false, | ||
| wantVerificationErr: false, | ||
| }, | ||
| { | ||
| name: "found, would be verified if not for timeout", | ||
| s: Scanner{client: common.SaneHttpClientTimeOut(1 * time.Microsecond)}, | ||
| args: args{ | ||
| ctx: context.Background(), | ||
| data: []byte(fmt.Sprintf("You can find a azure secret %s azure url %s", secret, url)), | ||
| verify: true, | ||
| }, | ||
| want: []detectors.Result{ | ||
| { | ||
| DetectorType: detectorspb.DetectorType_AzureFunctionKey, | ||
| Verified: false, | ||
| }, | ||
| }, | ||
| wantErr: false, | ||
| wantVerificationErr: true, | ||
| }, | ||
| { | ||
| name: "found, verified but unexpected api surface", | ||
| s: Scanner{client: common.ConstantResponseHttpClient(404, "")}, | ||
| args: args{ | ||
| ctx: context.Background(), | ||
| data: []byte(fmt.Sprintf("You can find a azure secret %s azure url %s", secret, url)), | ||
| verify: true, | ||
| }, | ||
| want: []detectors.Result{ | ||
| { | ||
| DetectorType: detectorspb.DetectorType_AzureFunctionKey, | ||
| Verified: false, | ||
| }, | ||
| }, | ||
| wantErr: false, | ||
| wantVerificationErr: true, | ||
| }, | ||
| } | ||
| for _, tt := range tests { | ||
| t.Run(tt.name, func(t *testing.T) { | ||
| got, err := tt.s.FromData(tt.args.ctx, tt.args.verify, tt.args.data) | ||
| if (err != nil) != tt.wantErr { | ||
| t.Errorf("Azurefunctionkey.FromData() error = %v, wantErr %v", err, tt.wantErr) | ||
| return | ||
| } | ||
| for i := range got { | ||
| if len(got[i].Raw) == 0 { | ||
| t.Fatalf("no raw secret present: \n %+v", got[i]) | ||
| } | ||
| if (got[i].VerificationError() != nil) != tt.wantVerificationErr { | ||
| t.Fatalf("wantVerificationError = %v, verification error = %v", tt.wantVerificationErr, got[i].VerificationError()) | ||
| } | ||
| } | ||
| ignoreOpts := cmpopts.IgnoreFields(detectors.Result{}, "Raw", "verificationError") | ||
| if diff := cmp.Diff(got, tt.want, ignoreOpts); diff != "" { | ||
| t.Errorf("Azurefunctionkey.FromData() %s diff: (-got +want)\n%s", tt.name, diff) | ||
| } | ||
| }) | ||
| } | ||
| } | ||
|
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| func BenchmarkFromData(benchmark *testing.B) { | ||
| ctx := context.Background() | ||
| s := Scanner{} | ||
| for name, data := range detectors.MustGetBenchmarkData() { | ||
| benchmark.Run(name, func(b *testing.B) { | ||
| b.ResetTimer() | ||
| for n := 0; n < b.N; n++ { | ||
| _, err := s.FromData(ctx, false, data) | ||
| if err != nil { | ||
| b.Fatal(err) | ||
| } | ||
| } | ||
| }) | ||
| } | ||
| } |
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