feat(14-04): implement 7 Phase 14 sources (CI/CD, archives, JS bundles)

- TravisCISource: scrapes public Travis CI build logs for API key leaks
- GitHubActionsSource: searches Actions workflow logs (requires GitHub token)
- CircleCISource: scrapes CircleCI pipeline logs (requires CircleCI token)
- JenkinsSource: scrapes public Jenkins console output for leaked secrets
- WaybackMachineSource: searches Wayback Machine CDX for archived key leaks
- CommonCrawlSource: searches Common Crawl index for exposed pages
- JSBundleSource: probes JS bundles for embedded API key literals

pkg/recon/sources/wayback.go

@@ -0,0 +1,134 @@
+package sources
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"io"
+	"net/http"
+	"time"
+
+	"golang.org/x/time/rate"
+
+	"github.com/salvacybersec/keyhunter/pkg/providers"
+	"github.com/salvacybersec/keyhunter/pkg/recon"
+)
+
+// WaybackMachineSource searches the Internet Archive's Wayback Machine CDX API
+// for archived pages that may contain leaked API keys. Developers sometimes
+// remove secrets from live pages but cached versions persist in web archives.
+type WaybackMachineSource struct {
+	BaseURL  string
+	Registry *providers.Registry
+	Limiters *recon.LimiterRegistry
+	Client   *Client
+}
+
+var _ recon.ReconSource = (*WaybackMachineSource)(nil)
+
+func (s *WaybackMachineSource) Name() string              { return "wayback" }
+func (s *WaybackMachineSource) RateLimit() rate.Limit      { return rate.Every(5 * time.Second) }
+func (s *WaybackMachineSource) Burst() int                 { return 1 }
+func (s *WaybackMachineSource) RespectsRobots() bool       { return true }
+func (s *WaybackMachineSource) Enabled(_ recon.Config) bool { return true }
+
+func (s *WaybackMachineSource) Sweep(ctx context.Context, _ string, out chan<- recon.Finding) error {
+	base := s.BaseURL
+	if base == "" {
+		base = "https://web.archive.org"
+	}
+	client := s.Client
+	if client == nil {
+		client = NewClient()
+	}
+
+	queries := BuildQueries(s.Registry, "wayback")
+	if len(queries) == 0 {
+		return nil
+	}
+
+	for _, q := range queries {
+		if err := ctx.Err(); err != nil {
+			return err
+		}
+
+		if s.Limiters != nil {
+			if err := s.Limiters.Wait(ctx, s.Name(), s.RateLimit(), s.Burst(), false); err != nil {
+				return err
+			}
+		}
+
+		// CDX API: search for archived URLs matching the query.
+		// Filter for .env, config, and JS files that commonly contain keys.
+		cdxURL := fmt.Sprintf("%s/cdx/search/cdx?url=*%s*&output=json&limit=10&fl=url,timestamp,statuscode&filter=statuscode:200", base, q)
+		req, err := http.NewRequestWithContext(ctx, http.MethodGet, cdxURL, nil)
+		if err != nil {
+			continue
+		}
+		req.Header.Set("Accept", "application/json")
+
+		resp, err := client.Do(ctx, req)
+		if err != nil {
+			continue
+		}
+
+		var rows [][]string
+		if err := json.NewDecoder(resp.Body).Decode(&rows); err != nil {
+			_ = resp.Body.Close()
+			continue
+		}
+		_ = resp.Body.Close()
+
+		// Skip the header row if present.
+		start := 0
+		if len(rows) > 0 && len(rows[0]) > 0 && rows[0][0] == "url" {
+			start = 1
+		}
+
+		for _, row := range rows[start:] {
+			if err := ctx.Err(); err != nil {
+				return err
+			}
+			if len(row) < 2 {
+				continue
+			}
+			archivedURL := row[0]
+			timestamp := row[1]
+
+			if s.Limiters != nil {
+				if err := s.Limiters.Wait(ctx, s.Name(), s.RateLimit(), s.Burst(), false); err != nil {
+					return err
+				}
+			}
+
+			// Fetch the archived page content.
+			snapshotURL := fmt.Sprintf("%s/web/%sid_/%s", base, timestamp, archivedURL)
+			snapReq, err := http.NewRequestWithContext(ctx, http.MethodGet, snapshotURL, nil)
+			if err != nil {
+				continue
+			}
+
+			snapResp, err := client.Do(ctx, snapReq)
+			if err != nil {
+				continue
+			}
+
+			body, err := io.ReadAll(io.LimitReader(snapResp.Body, 256*1024))
+			_ = snapResp.Body.Close()
+			if err != nil {
+				continue
+			}
+
+			if apiKeyPattern.Match(body) {
+				out <- recon.Finding{
+					ProviderName: q,
+					Source:       snapshotURL,
+					SourceType:   "recon:wayback",
+					Confidence:   "medium",
+					DetectedAt:   time.Now(),
+				}
+			}
+		}
+	}
+	return nil
+}