Added Cisco Meraki API Key detector (#3367)

* Added cisco meraki apikey detector

* addressed the comments

* handled api response and saving orgs data in extra data

* fixed linter

---------

Co-authored-by: Zachary Rice <zachary.rice@trufflesec.com>

pkg/detectors/meraki/meraki.go

@@ -0,0 +1,135 @@
+package meraki
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	regexp "github.com/wasilibs/go-re2"
+	"io"
+	"net/http"
+
+	"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
+}
+
+// merakiOrganizations is the partial response from the /organizations api of cisco Meraki.
+// api docs: https://developer.cisco.com/meraki/api-v1/get-organizations/
+type merakiOrganizations struct {
+	ID   string `json:"id"`
+	Name string `json:"name"`
+}
+
+// Ensure the Scanner satisfies the interface at compile time.
+var _ detectors.Detector = (*Scanner)(nil)
+
+var (
+	defaultClient = common.SaneHttpClient()
+
+	apiKey = regexp.MustCompile(detectors.PrefixRegex([]string{"meraki"}) + `([0-9a-f]{40})`)
+)
+
+func (s Scanner) getClient() *http.Client {
+	if s.client != nil {
+		return s.client
+	}
+
+	return defaultClient
+}
+
+// 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{"meraki"}
+}
+
+func (s Scanner) Description() string {
+	return "Cisco Meraki is a cloud-managed IT solution that provides networking, security, and device management through an easy-to-use interface." +
+		"Meraki APIs make it possible to rapidly deploy and manage networks at scale, build on a platform of intelligent, cloud-connected IT products, and engage with users in powerful new ways."
+}
+
+// FromData will find and optionally verify Meraki API Key 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)
+
+	// uniqueMatches will hold unique match values and ensure we only process unique matches found in the data string
+	var uniqueMatches = make(map[string]struct{})
+
+	for _, match := range apiKey.FindAllStringSubmatch(dataStr, -1) {
+		uniqueMatches[match[1]] = struct{}{}
+	}
+
+	for match := range uniqueMatches {
+		s1 := detectors.Result{
+			DetectorType: detectorspb.DetectorType_Meraki,
+			Raw:          []byte(match),
+			ExtraData:    make(map[string]string),
+		}
+
+		if verify {
+			client := s.getClient()
+			organizations, isVerified, verificationErr := verifyMerakiApiKey(ctx, client, match)
+			s1.Verified = isVerified
+			if verificationErr != nil {
+				s1.SetVerificationError(verificationErr)
+			}
+
+			// if organizations are not nil, which means token was verified.
+			for _, org := range organizations {
+				// format: ExtraData{"organization_1": "Example", organization_2": "Example"}
+				s1.ExtraData[fmt.Sprintf("organization_%s", org.ID)] = org.Name
+			}
+
+		}
+
+		results = append(results, s1)
+	}
+
+	return results, nil
+}
+
+func (s Scanner) Type() detectorspb.DetectorType {
+	return detectorspb.DetectorType_Meraki
+}
+
+/*
+verifyMerakiApiKey verifies if the passed matched api key for meraki is active or not.
+docs: https://developer.cisco.com/meraki/api-v1/authorization/#authorization
+*/
+func verifyMerakiApiKey(ctx context.Context, client *http.Client, match string) ([]merakiOrganizations, bool, error) {
+	req, err := http.NewRequestWithContext(ctx, "GET", "https://api.meraki.com/api/v1/organizations", http.NoBody)
+	if err != nil {
+		return nil, false, err
+	}
+
+	// set the required auth header
+	req.Header.Set("X-Cisco-Meraki-API-Key", match)
+
+	resp, err := client.Do(req)
+	if err != nil {
+		return nil, false, err
+	}
+	defer func() {
+		_, _ = io.Copy(io.Discard, resp.Body)
+		_ = resp.Body.Close()
+	}()
+
+	switch resp.StatusCode {
+	case http.StatusOK:
+		// in case token is verified, capture the organization id's and name which are accessible via token.
+		var organizations []merakiOrganizations
+		if err = json.NewDecoder(resp.Body).Decode(&organizations); err != nil {
+			return nil, false, err
+		}
+
+		return organizations, true, nil
+	case http.StatusUnauthorized:
+		return nil, false, nil
+	default:
+		return nil, false, fmt.Errorf("unexpected status code: %d", resp.StatusCode)
+	}
+}

pkg/detectors/meraki/meraki_integration_test.go

@@ -0,0 +1,158 @@
+package meraki
+
+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 TestMeraki_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("MERAKI")
+	inactiveSecret := testSecrets.MustGetField("MERAKI_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:    ctx,
+				data:   []byte(fmt.Sprintf("You can find a meraki apikey %s within", secret)),
+				verify: true,
+			},
+			want: []detectors.Result{
+				{
+					DetectorType: detectorspb.DetectorType_Meraki,
+					Verified:     true,
+				},
+			},
+			wantErr:             false,
+			wantVerificationErr: false,
+		},
+		{
+			name: "found, unverified",
+			s:    Scanner{},
+			args: args{
+				ctx:    ctx,
+				data:   []byte(fmt.Sprintf("You can find a meraki apikey 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_Meraki,
+					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 meraki apikey %s within", secret)),
+				verify: true,
+			},
+			want: []detectors.Result{
+				{
+					DetectorType: detectorspb.DetectorType_Meraki,
+					Verified:     false,
+				},
+			},
+			wantErr:             false,
+			wantVerificationErr: true,
+		},
+		{
+			name: "found, verified but unexpected api surface",
+			s:    Scanner{client: common.ConstantResponseHttpClient(500, "")},
+			args: args{
+				ctx:    context.Background(),
+				data:   []byte(fmt.Sprintf("You can find a meraki secret %s within", secret)),
+				verify: true,
+			},
+			want: []detectors.Result{
+				{
+					DetectorType: detectorspb.DetectorType_Meraki,
+					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("Meraki.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("Meraki.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/meraki/meraki_test.go

@@ -0,0 +1,102 @@
+package meraki
+
+import (
+	"context"
+	"fmt"
+	"testing"
+
+	"github.com/google/go-cmp/cmp"
+
+	"github.com/trufflesecurity/trufflehog/v3/pkg/detectors"
+	"github.com/trufflesecurity/trufflehog/v3/pkg/engine/ahocorasick"
+)
+
+var (
+	// example picked from: https://github.com/CiscoLearning/ciscolive-ltrcrt-1100/blob/cd0b8f14883ccd70e2db370f8f7a36534bdfe073/02-intro-python/code/meraki_api_info.md?plain=1#L8
+	validPattern = `Information used in API calls for meraki
+Variable name | Initial Value
+apiKey |e9e0f062f587b423bb6cc6328eb786d75b45783e
+baseUrl |https://api.meraki.com/api/v1
+organizationId |646829496481091262
+networkId |L_646829496481117067
+serial |`
+
+	validPatternWithNoKeyword = `Information used in API calls
+Variable name | Initial Value
+apiKey |e9e0f062f587b423bb6cc6328eb786d75b45783e
+baseUrl |https://api.meraki.com/api/v1
+organizationId |646829496481091262
+networkId |L_646829496481117067
+serial |`
+
+	invalidPattern = "001A1E0092C7a711d7679d%d0d442d59b05ce65D"
+)
+
+func TestMeraki_Pattern(t *testing.T) {
+	d := Scanner{}
+	ahoCorasickCore := ahocorasick.NewAhoCorasickCore([]detectors.Detector{d})
+
+	tests := []struct {
+		name  string
+		input string
+		want  []string
+	}{
+		{
+			name:  "valid pattern",
+			input: fmt.Sprintf("meraki token = '%s'", validPattern),
+			want:  []string{"e9e0f062f587b423bb6cc6328eb786d75b45783e"},
+		},
+		{
+			name:  "valid pattern - out of prefix range",
+			input: fmt.Sprintf("meraki token keyword is not close to the real token = '%s'", validPatternWithNoKeyword),
+			want:  nil,
+		},
+		{
+			name:  "invalid pattern",
+			input: fmt.Sprintf("meraki = '%s'", invalidPattern),
+			want:  nil,
+		},
+	}
+
+	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)
+			}
+		})
+	}
+}