135 lines
3.3 KiB
Go
135 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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"fmt"
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"io"
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"net/http"
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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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// WaybackMachineSource searches the Internet Archive's Wayback Machine CDX API
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// for archived pages that may contain leaked API keys. Developers sometimes
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// remove secrets from live pages but cached versions persist in web archives.
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type WaybackMachineSource 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 = (*WaybackMachineSource)(nil)
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func (s *WaybackMachineSource) Name() string { return "wayback" }
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func (s *WaybackMachineSource) RateLimit() rate.Limit { return rate.Every(5 * time.Second) }
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func (s *WaybackMachineSource) Burst() int { return 1 }
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func (s *WaybackMachineSource) RespectsRobots() bool { return true }
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func (s *WaybackMachineSource) Enabled(_ recon.Config) bool { return true }
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func (s *WaybackMachineSource) 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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base = "https://web.archive.org"
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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, "wayback")
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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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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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// CDX API: search for archived URLs matching the query.
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// Filter for .env, config, and JS files that commonly contain keys.
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cdxURL := fmt.Sprintf("%s/cdx/search/cdx?url=*%s*&output=json&limit=10&fl=url,timestamp,statuscode&filter=statuscode:200", base, q)
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req, err := http.NewRequestWithContext(ctx, http.MethodGet, cdxURL, 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
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}
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var rows [][]string
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if err := json.NewDecoder(resp.Body).Decode(&rows); 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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// Skip the header row if present.
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start := 0
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if len(rows) > 0 && len(rows[0]) > 0 && rows[0][0] == "url" {
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start = 1
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}
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for _, row := range rows[start:] {
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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 len(row) < 2 {
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continue
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}
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archivedURL := row[0]
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timestamp := row[1]
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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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// Fetch the archived page content.
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snapshotURL := fmt.Sprintf("%s/web/%sid_/%s", base, timestamp, archivedURL)
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snapReq, err := http.NewRequestWithContext(ctx, http.MethodGet, snapshotURL, nil)
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if err != nil {
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continue
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}
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snapResp, err := client.Do(ctx, snapReq)
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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(snapResp.Body, 256*1024))
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_ = snapResp.Body.Close()
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if err != nil {
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continue
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}
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if apiKeyPattern.Match(body) {
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out <- recon.Finding{
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ProviderName: q,
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Source: snapshotURL,
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SourceType: "recon:wayback",
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Confidence: "medium",
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DetectedAt: time.Now(),
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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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