Added LangSmith API Key detector

pkg/detectors/langsmith/langsmith.go

@@ -0,0 +1,100 @@
+package langsmith
+
+import (
+	"context"
+	"fmt"
+	"io"
+	"net/http"
+
+	regexp "github.com/wasilibs/go-re2"
+
+	"github.com/trufflesecurity/trufflehog/v3/pkg/common"
+	"github.com/trufflesecurity/trufflehog/v3/pkg/detectors"
+	"github.com/trufflesecurity/trufflehog/v3/pkg/pb/detectorspb"
+)
+
+type Scanner struct {
+	client *http.Client
+}
+
+// Ensure the Scanner satisfies the interface at compile time.
+var _ detectors.Detector = (*Scanner)(nil)
+
+var (
+	defaultClient = common.SaneHttpClient()
+	// Make sure that your group is surrounded in boundary characters such as below to reduce false positives.
+	keyPat = regexp.MustCompile(`\b(lsv2_(?:pt|sk)_[a-f0-9]{32}_[a-f0-9]{10})\b`) // personal api token and service keys
+)
+
+// 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{"lsv2_pt_", "lsv2_sk_"}
+}
+
+// FromData will find and optionally verify Langsmith 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)
+
+	uniqueAPIKeys := make(map[string]struct{})
+	for _, match := range keyPat.FindAllStringSubmatch(dataStr, -1) {
+		uniqueAPIKeys[match[1]] = struct{}{}
+	}
+
+	for apiKey := range uniqueAPIKeys {
+		s1 := detectors.Result{
+			DetectorType: detectorspb.DetectorType_LangSmith,
+			Raw:          []byte(apiKey),
+		}
+
+		if verify {
+			client := s.client
+			if client == nil {
+				client = defaultClient
+			}
+
+			isVerified, verificationErr := verifyMatch(ctx, client, apiKey)
+			s1.Verified = isVerified
+			s1.SetVerificationError(verificationErr, apiKey)
+		}
+
+		results = append(results, s1)
+	}
+
+	return
+}
+
+func verifyMatch(ctx context.Context, client *http.Client, apiKey string) (bool, error) {
+	req, err := http.NewRequestWithContext(ctx, http.MethodGet, "https://api.smith.langchain.com/api/v1/api-key", http.NoBody)
+	if err != nil {
+		return false, nil
+	}
+
+	req.Header.Set("X-API-Key", apiKey)
+
+	res, err := client.Do(req)
+	if err != nil {
+		return false, err
+	}
+	defer func() {
+		_, _ = io.Copy(io.Discard, res.Body)
+		_ = res.Body.Close()
+	}()
+
+	switch res.StatusCode {
+	case http.StatusOK:
+		return true, nil
+	case http.StatusUnauthorized, http.StatusForbidden:
+		return false, nil
+	default:
+		return false, fmt.Errorf("unexpected HTTP response status %d", res.StatusCode)
+	}
+}
+
+func (s Scanner) Type() detectorspb.DetectorType {
+	return detectorspb.DetectorType_LangSmith
+}
+
+func (s Scanner) Description() string {
+	return "LangSmith is a unified observability & evals platform where teams can debug, test, and monitor AI app performance — whether building with LangChain or not"
+}

pkg/detectors/langsmith/langsmith_integration_test.go

@@ -0,0 +1,127 @@
+//go:build detectors
+// +build detectors
+
+package langsmith
+
+import (
+	"context"
+	"fmt"
+	"testing"
+	"time"
+
+	"github.com/google/go-cmp/cmp"
+	"github.com/google/go-cmp/cmp/cmpopts"
+
+	"github.com/trufflesecurity/trufflehog/v3/pkg/common"
+	"github.com/trufflesecurity/trufflehog/v3/pkg/detectors"
+	"github.com/trufflesecurity/trufflehog/v3/pkg/pb/detectorspb"
+)
+
+func TestLangsmith_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("LANGSMITH")
+	inactiveSecret := testSecrets.MustGetField("LANGSMITH_INACTIVE")
+
+	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 langsmith secret %s within", secret)),
+				verify: true,
+			},
+			want: []detectors.Result{
+				{
+					DetectorType: detectorspb.DetectorType_LangSmith,
+					Verified:     true,
+				},
+			},
+			wantErr:             false,
+			wantVerificationErr: false,
+		},
+		{
+			name: "found, unverified",
+			s:    Scanner{},
+			args: args{
+				ctx:    context.Background(),
+				data:   []byte(fmt.Sprintf("You can find a langsmith secret %s within but not valid", inactiveSecret)), // the secret would satisfy the regex but not pass validation
+				verify: true,
+			},
+			want: []detectors.Result{
+				{
+					DetectorType: detectorspb.DetectorType_LangSmith,
+					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,
+		},
+	}
+	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("Langsmith.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", "primarySecret")
+			if diff := cmp.Diff(got, tt.want, ignoreOpts); diff != "" {
+				t.Errorf("Langsmith.FromData() %s diff: (-got +want)\n%s", tt.name, diff)
+			}
+		})
+	}
+}
+
+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)
+				}
+			}
+		})
+	}
+}

pkg/detectors/langsmith/langsmith_test.go

@@ -0,0 +1,78 @@
+package langsmith
+
+import (
+	"context"
+	"testing"
+
+	"github.com/google/go-cmp/cmp"
+	"github.com/trufflesecurity/trufflehog/v3/pkg/detectors"
+	"github.com/trufflesecurity/trufflehog/v3/pkg/engine/ahocorasick"
+)
+
+func TestLangsmith_Pattern(t *testing.T) {
+	d := Scanner{}
+	ahoCorasickCore := ahocorasick.NewAhoCorasickCore([]detectors.Detector{d})
+	tests := []struct {
+		name  string
+		input string
+		want  []string
+	}{
+		{
+			name:  "typical pattern",
+			input: "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",
+			want:  []string{"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"},
+		},
+		{
+			name:  "finds all matches",
+			input: `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 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`,
+			want:  []string{"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", "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"},
+		},
+		{
+			name:  "invalid pattern",
+			input: "lsv2_pt_1e0430d40fc14d3fj03397b9e6z46289_2b9036edd2",
+			want:  []string{},
+		},
+	}
+
+	for _, test := range tests {
+		t.Run(test.name, func(t *testing.T) {
+			matchedDetectors := ahoCorasickCore.FindDetectorMatches([]byte(test.input))
+			if len(matchedDetectors) == 0 {
+				t.Errorf("keywords '%v' not matched by: %s", d.Keywords(), test.input)
+				return
+			}
+
+			results, err := d.FromData(context.Background(), false, []byte(test.input))
+			if err != nil {
+				t.Errorf("error = %v", err)
+				return
+			}
+
+			if len(results) != len(test.want) {
+				if len(results) == 0 {
+					t.Errorf("did not receive result")
+				} else {
+					t.Errorf("expected %d results, only received %d", len(test.want), len(results))
+				}
+				return
+			}
+
+			actual := make(map[string]struct{}, len(results))
+			for _, r := range results {
+				if len(r.RawV2) > 0 {
+					actual[string(r.RawV2)] = struct{}{}
+				} else {
+					actual[string(r.Raw)] = struct{}{}
+				}
+			}
+			expected := make(map[string]struct{}, len(test.want))
+			for _, v := range test.want {
+				expected[v] = struct{}{}
+			}
+
+			if diff := cmp.Diff(expected, actual); diff != "" {
+				t.Errorf("%s diff: (-want +got)\n%s", test.name, diff)
+			}
+		})
+	}
+}

pkg/engine/defaults/defaults.go

@@ -406,6 +406,7 @@ import (
 	"github.com/trufflesecurity/trufflehog/v3/pkg/detectors/kucoin"
 	"github.com/trufflesecurity/trufflehog/v3/pkg/detectors/kylas"
 	"github.com/trufflesecurity/trufflehog/v3/pkg/detectors/langfuse"
+	"github.com/trufflesecurity/trufflehog/v3/pkg/detectors/langsmith"
 	"github.com/trufflesecurity/trufflehog/v3/pkg/detectors/languagelayer"
 	"github.com/trufflesecurity/trufflehog/v3/pkg/detectors/larksuite"
 	"github.com/trufflesecurity/trufflehog/v3/pkg/detectors/larksuiteapikey"
@@ -1263,6 +1264,7 @@ func buildDetectorList() []detectors.Detector {
 		&kucoin.Scanner{},
 		&kylas.Scanner{},
 		&langfuse.Scanner{},
+		&langsmith.Scanner{},
 		&languagelayer.Scanner{},
 		&larksuite.Scanner{},
 		&larksuiteapikey.Scanner{},

proto/detectors.proto

@@ -1037,6 +1037,7 @@ enum DetectorType {
   AzureAppConfigConnectionString = 1025;
   DeepSeek = 1026;
   StripePaymentIntent = 1027;
+  LangSmith = 1028;
 }
 
 message Result {