feat(13-03): implement DockerHubSource and KubernetesSource

- DockerHub searches hub.docker.com v2 search API for repos matching provider keywords
- Kubernetes searches Artifact Hub for operators/manifests with kind-aware URL paths
- Both sources: context cancellation, nil registry, httptest-based tests

pkg/recon/sources/kubernetes_test.go

@@ -0,0 +1,200 @@
+package sources
+
+import (
+	"context"
+	"encoding/json"
+	"errors"
+	"net/http"
+	"net/http/httptest"
+	"sync/atomic"
+	"testing"
+	"time"
+
+	"github.com/salvacybersec/keyhunter/pkg/recon"
+)
+
+func k8sStubHandler(t *testing.T, calls *int32) http.HandlerFunc {
+	t.Helper()
+	return func(w http.ResponseWriter, r *http.Request) {
+		atomic.AddInt32(calls, 1)
+		if r.URL.Path != "/api/v1/packages/search" {
+			t.Errorf("unexpected path: %s", r.URL.Path)
+		}
+		if r.URL.Query().Get("ts_query_web") == "" {
+			t.Errorf("missing ts_query_web param")
+		}
+		body := k8sSearchResponse{
+			Packages: []k8sPackage{
+				{
+					PackageID:      "pkg-1",
+					Name:           "openai-operator",
+					NormalizedName: "openai-operator",
+					Repository:     k8sRepo{Name: "community", Kind: 6},
+				},
+				{
+					PackageID:      "pkg-2",
+					Name:           "llm-secrets",
+					NormalizedName: "llm-secrets",
+					Repository:     k8sRepo{Name: "stable", Kind: 0},
+				},
+			},
+		}
+		w.Header().Set("Content-Type", "application/json")
+		_ = json.NewEncoder(w).Encode(body)
+	}
+}
+
+func TestKubernetes_SweepEmitsFindings(t *testing.T) {
+	reg := syntheticRegistry()
+	lim := recon.NewLimiterRegistry()
+	_ = lim.For("k8s", 1000, 100)
+
+	var calls int32
+	srv := httptest.NewServer(k8sStubHandler(t, &calls))
+	defer srv.Close()
+
+	src := &KubernetesSource{
+		BaseURL:  srv.URL,
+		Registry: reg,
+		Limiters: lim,
+		Client:   NewClient(),
+	}
+
+	out := make(chan recon.Finding, 32)
+	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
+	defer cancel()
+
+	done := make(chan error, 1)
+	go func() { done <- src.Sweep(ctx, "", out); close(out) }()
+
+	var findings []recon.Finding
+	for f := range out {
+		findings = append(findings, f)
+	}
+	if err := <-done; err != nil {
+		t.Fatalf("Sweep error: %v", err)
+	}
+
+	// 2 keywords * 2 results = 4 findings
+	if len(findings) != 4 {
+		t.Fatalf("expected 4 findings, got %d", len(findings))
+	}
+	for _, f := range findings {
+		if f.SourceType != "recon:k8s" {
+			t.Errorf("SourceType=%q want recon:k8s", f.SourceType)
+		}
+	}
+	if got := atomic.LoadInt32(&calls); got != 2 {
+		t.Errorf("expected 2 server calls, got %d", got)
+	}
+}
+
+func TestKubernetes_KindPaths(t *testing.T) {
+	reg := syntheticRegistry()
+	lim := recon.NewLimiterRegistry()
+	_ = lim.For("k8s", 1000, 100)
+
+	var calls int32
+	srv := httptest.NewServer(k8sStubHandler(t, &calls))
+	defer srv.Close()
+
+	src := &KubernetesSource{
+		BaseURL:  srv.URL,
+		Registry: reg,
+		Limiters: lim,
+		Client:   NewClient(),
+	}
+
+	out := make(chan recon.Finding, 32)
+	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
+	defer cancel()
+
+	done := make(chan error, 1)
+	go func() { done <- src.Sweep(ctx, "", out); close(out) }()
+
+	var findings []recon.Finding
+	for f := range out {
+		findings = append(findings, f)
+	}
+	if err := <-done; err != nil {
+		t.Fatalf("Sweep error: %v", err)
+	}
+
+	// Check that kind=6 maps to kube-operator and kind=0 maps to helm in URLs.
+	hasOperator := false
+	hasHelm := false
+	for _, f := range findings {
+		if contains(f.Source, "/kube-operator/") {
+			hasOperator = true
+		}
+		if contains(f.Source, "/helm/") {
+			hasHelm = true
+		}
+	}
+	if !hasOperator {
+		t.Error("expected at least one finding with kube-operator path")
+	}
+	if !hasHelm {
+		t.Error("expected at least one finding with helm path")
+	}
+}
+
+func TestKubernetes_EnabledAlwaysTrue(t *testing.T) {
+	s := &KubernetesSource{}
+	if !s.Enabled(recon.Config{}) {
+		t.Fatal("expected Enabled=true")
+	}
+}
+
+func TestKubernetes_NameAndRate(t *testing.T) {
+	s := &KubernetesSource{}
+	if s.Name() != "k8s" {
+		t.Errorf("unexpected name: %s", s.Name())
+	}
+	if s.Burst() != 1 {
+		t.Errorf("burst: %d", s.Burst())
+	}
+	if !s.RespectsRobots() {
+		t.Error("expected RespectsRobots=true")
+	}
+}
+
+func TestKubernetes_CtxCancelled(t *testing.T) {
+	reg := syntheticRegistry()
+	lim := recon.NewLimiterRegistry()
+	_ = lim.For("k8s", 1000, 100)
+
+	src := &KubernetesSource{
+		BaseURL:  "http://127.0.0.1:1",
+		Registry: reg,
+		Limiters: lim,
+		Client:   NewClient(),
+	}
+
+	ctx, cancel := context.WithCancel(context.Background())
+	cancel()
+
+	out := make(chan recon.Finding, 1)
+	err := src.Sweep(ctx, "", out)
+	if !errors.Is(err, context.Canceled) {
+		t.Fatalf("expected context.Canceled, got %v", err)
+	}
+}
+
+func TestKubernetes_NilRegistryNoError(t *testing.T) {
+	src := &KubernetesSource{Client: NewClient()}
+	out := make(chan recon.Finding, 1)
+	if err := src.Sweep(context.Background(), "", out); err != nil {
+		t.Fatalf("expected nil, got %v", err)
+	}
+}
+
+// contains checks if substr is in s. Avoids importing strings in test.
+func contains(s, substr string) bool {
+	for i := 0; i+len(substr) <= len(s); i++ {
+		if s[i:i+len(substr)] == substr {
+			return true
+		}
+	}
+	return false
+}