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
110 lines
2.7 KiB
Go
110 lines
2.7 KiB
Go
package sources
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import (
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"context"
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"fmt"
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"io"
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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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// WebpackSource probes for Webpack/Vite build artifacts that contain inlined
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// environment variables. Bundlers like Webpack and Vite inline process.env.*
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// values at build time, frequently shipping API keys to production bundles.
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type WebpackSource 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 = (*WebpackSource)(nil)
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func (s *WebpackSource) Name() string { return "webpack" }
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func (s *WebpackSource) RateLimit() rate.Limit { return rate.Every(3 * time.Second) }
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func (s *WebpackSource) Burst() int { return 2 }
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func (s *WebpackSource) RespectsRobots() bool { return true }
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func (s *WebpackSource) Enabled(_ recon.Config) bool { return true }
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// envVarPattern matches inlined environment variable patterns from bundlers.
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var envVarPattern = regexp.MustCompile(`(?i)(NEXT_PUBLIC_|REACT_APP_|VITE_|VUE_APP_|NUXT_|GATSBY_)[A-Z_]*(API[_]?KEY|SECRET|TOKEN|PASSWORD)['":\s]*[=:,]\s*['"]([a-zA-Z0-9_\-]{8,})['"]`)
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// webpackBundlePaths are common locations for JS bundle artifacts.
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var webpackBundlePaths = []string{
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"/static/js/main.js",
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"/static/js/bundle.js",
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"/_next/static/chunks/main.js",
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"/assets/index.js",
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"/dist/bundle.js",
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"/build/static/js/main.js",
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}
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func (s *WebpackSource) Sweep(ctx context.Context, _ string, out chan<- recon.Finding) error {
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base := s.BaseURL
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if base == "" {
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return nil
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}
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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, "webpack")
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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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for _, path := range webpackBundlePaths {
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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 := fmt.Sprintf("%s%s", base, path)
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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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resp, err := client.Do(ctx, req)
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if err != nil {
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continue
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}
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body, err := io.ReadAll(io.LimitReader(resp.Body, 512*1024)) // 512KB max
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_ = resp.Body.Close()
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if err != nil {
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continue
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}
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if envVarPattern.Match(body) {
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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:webpack",
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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 query is sufficient
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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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