b57bd5e7d9
- SourceMapSource probes .map files for original source containing API keys - WebpackSource scans JS bundles for inlined NEXT_PUBLIC_/REACT_APP_/VITE_ env vars - EnvLeakSource probes common .env paths for exposed environment files - All three implement ReconSource, credentialless, with httptest-based tests
124 lines
3.3 KiB
Go
124 lines
3.3 KiB
Go
package sources
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import (
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"context"
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"encoding/json"
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"net/http"
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"regexp"
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"time"
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"golang.org/x/time/rate"
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"github.com/salvacybersec/keyhunter/pkg/providers"
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"github.com/salvacybersec/keyhunter/pkg/recon"
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)
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// SourceMapSource probes for publicly accessible JavaScript source maps (.map
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// files) that contain original source code. Developers frequently ship source
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// maps to production, exposing server-side secrets embedded during bundling.
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type SourceMapSource struct {
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BaseURL string
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Registry *providers.Registry
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Limiters *recon.LimiterRegistry
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Client *Client
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}
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var _ recon.ReconSource = (*SourceMapSource)(nil)
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func (s *SourceMapSource) Name() string { return "sourcemaps" }
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func (s *SourceMapSource) RateLimit() rate.Limit { return rate.Every(3 * time.Second) }
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func (s *SourceMapSource) Burst() int { return 2 }
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func (s *SourceMapSource) RespectsRobots() bool { return true }
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func (s *SourceMapSource) Enabled(_ recon.Config) bool { return true }
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// sourceMapResponse represents the top-level JSON of a .map file.
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type sourceMapResponse struct {
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Sources []string `json:"sources"`
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SourcesContent []string `json:"sourcesContent"`
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}
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// apiKeyPattern matches common API key patterns in source content.
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var apiKeyPattern = regexp.MustCompile(`(?i)(api[_-]?key|secret|token|password|credential|auth)['":\s]*[=:]\s*['"]([a-zA-Z0-9_\-]{16,})['"]`)
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// sourceMapPaths are common locations where source maps are served.
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var sourceMapPaths = []string{
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"/static/js/main.js.map",
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"/static/js/bundle.js.map",
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"/assets/index.js.map",
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"/dist/bundle.js.map",
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"/main.js.map",
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"/app.js.map",
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"/_next/static/chunks/main.js.map",
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}
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func (s *SourceMapSource) Sweep(ctx context.Context, _ string, out chan<- recon.Finding) error {
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base := s.BaseURL
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client := s.Client
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if client == nil {
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client = NewClient()
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}
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queries := BuildQueries(s.Registry, "sourcemaps")
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if len(queries) == 0 {
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return nil
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}
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for _, q := range queries {
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if err := ctx.Err(); err != nil {
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return err
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}
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// Each query is used as a domain/URL hint; probe common map paths.
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for _, path := range sourceMapPaths {
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if err := ctx.Err(); err != nil {
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return err
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}
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if s.Limiters != nil {
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if err := s.Limiters.Wait(ctx, s.Name(), s.RateLimit(), s.Burst(), false); err != nil {
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return err
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}
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}
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probeURL := base + path
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if base == "" {
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// Without a BaseURL we cannot construct real URLs; skip.
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continue
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}
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req, err := http.NewRequestWithContext(ctx, http.MethodGet, probeURL, nil)
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if err != nil {
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continue
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}
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req.Header.Set("Accept", "application/json")
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resp, err := client.Do(ctx, req)
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if err != nil {
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continue // 404s and other errors are expected during probing
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}
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var mapData sourceMapResponse
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if err := json.NewDecoder(resp.Body).Decode(&mapData); err != nil {
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_ = resp.Body.Close()
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continue
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}
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_ = resp.Body.Close()
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// Scan sourcesContent for API key patterns.
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for _, content := range mapData.SourcesContent {
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if apiKeyPattern.MatchString(content) {
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out <- recon.Finding{
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ProviderName: q,
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Source: probeURL,
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SourceType: "recon:sourcemaps",
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Confidence: "medium",
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DetectedAt: time.Now(),
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}
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break // one finding per map file is sufficient
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}
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}
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}
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}
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return nil
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}
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