feat(15-02): add Confluence and GoogleDocs ReconSource implementations

- ConfluenceSource searches exposed instances via /rest/api/content/search CQL
- GoogleDocsSource uses dorking + /export?format=txt for plain-text scanning
- HTML tag stripping for Confluence storage format
- Both credentialless, tests with httptest mocks confirm findings

pkg/recon/sources/googledocs.go

@@ -0,0 +1,139 @@
+package sources
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"io"
+	"net/http"
+	"net/url"
+	"time"
+
+	"golang.org/x/time/rate"
+
+	"github.com/salvacybersec/keyhunter/pkg/providers"
+	"github.com/salvacybersec/keyhunter/pkg/recon"
+)
+
+// GoogleDocsSource searches publicly shared Google Docs for leaked API keys.
+// Google Docs shared with "anyone with the link" are indexable by search
+// engines. This source uses a dorking approach to discover public docs and
+// then fetches their plain-text export for credential scanning.
+type GoogleDocsSource struct {
+	BaseURL  string
+	Registry *providers.Registry
+	Limiters *recon.LimiterRegistry
+	Client   *Client
+}
+
+var _ recon.ReconSource = (*GoogleDocsSource)(nil)
+
+func (s *GoogleDocsSource) Name() string               { return "googledocs" }
+func (s *GoogleDocsSource) RateLimit() rate.Limit       { return rate.Every(3 * time.Second) }
+func (s *GoogleDocsSource) Burst() int                  { return 2 }
+func (s *GoogleDocsSource) RespectsRobots() bool        { return true }
+func (s *GoogleDocsSource) Enabled(_ recon.Config) bool { return true }
+
+// googleDocsSearchResponse represents dork search results for Google Docs.
+type googleDocsSearchResponse struct {
+	Results []googleDocsSearchResult `json:"results"`
+}
+
+type googleDocsSearchResult struct {
+	URL   string `json:"url"`
+	Title string `json:"title"`
+}
+
+func (s *GoogleDocsSource) Sweep(ctx context.Context, _ string, out chan<- recon.Finding) error {
+	base := s.BaseURL
+	if base == "" {
+		base = "https://search.googledocs.dev"
+	}
+	client := s.Client
+	if client == nil {
+		client = NewClient()
+	}
+
+	queries := BuildQueries(s.Registry, "googledocs")
+	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
+			}
+		}
+
+		// Search for public Google Docs via dorking.
+		searchURL := fmt.Sprintf("%s/search?q=%s&format=json",
+			base, url.QueryEscape("site:docs.google.com "+q))
+		req, err := http.NewRequestWithContext(ctx, http.MethodGet, searchURL, nil)
+		if err != nil {
+			continue
+		}
+		req.Header.Set("Accept", "application/json")
+
+		resp, err := client.Do(ctx, req)
+		if err != nil {
+			continue
+		}
+
+		body, err := io.ReadAll(io.LimitReader(resp.Body, 256*1024))
+		_ = resp.Body.Close()
+		if err != nil {
+			continue
+		}
+
+		var results googleDocsSearchResponse
+		if err := json.Unmarshal(body, &results); err != nil {
+			continue
+		}
+
+		// Fetch each discovered doc's plain-text export.
+		for _, result := range results.Results {
+			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
+				}
+			}
+
+			exportURL := result.URL + "/export?format=txt"
+			docReq, err := http.NewRequestWithContext(ctx, http.MethodGet, exportURL, nil)
+			if err != nil {
+				continue
+			}
+
+			docResp, err := client.Do(ctx, docReq)
+			if err != nil {
+				continue
+			}
+
+			docBody, err := io.ReadAll(io.LimitReader(docResp.Body, 256*1024))
+			_ = docResp.Body.Close()
+			if err != nil {
+				continue
+			}
+
+			if ciLogKeyPattern.Match(docBody) {
+				out <- recon.Finding{
+					ProviderName: q,
+					Source:       result.URL,
+					SourceType:   "recon:googledocs",
+					Confidence:   "medium",
+					DetectedAt:   time.Now(),
+				}
+			}
+		}
+	}
+	return nil
+}