141 lines
3.6 KiB
Go
141 lines
3.6 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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"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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// TravisCISource scrapes public Travis CI build logs for leaked API keys.
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// Travis CI exposes build logs publicly by default for open-source projects.
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// Developers frequently print environment variables or use secrets insecurely
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// in CI scripts, causing API keys to appear in build output.
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type TravisCISource 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 = (*TravisCISource)(nil)
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func (s *TravisCISource) Name() string { return "travisci" }
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func (s *TravisCISource) RateLimit() rate.Limit { return rate.Every(3 * time.Second) }
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func (s *TravisCISource) Burst() int { return 2 }
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func (s *TravisCISource) RespectsRobots() bool { return false }
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func (s *TravisCISource) Enabled(_ recon.Config) bool { return true }
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// travisBuildResponse represents the Travis CI API builds response.
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type travisBuildResponse struct {
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Builds []travisBuild `json:"builds"`
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}
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type travisBuild struct {
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ID int `json:"id"`
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State string `json:"state"`
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}
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// ciLogKeyPattern matches API key patterns commonly leaked in CI logs.
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var ciLogKeyPattern = regexp.MustCompile(`(?i)(api[_-]?key|secret[_-]?key|token|password|credential|auth[_-]?token)['":\s]*[=:]\s*['"]?([a-zA-Z0-9_\-]{16,})['"]?`)
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func (s *TravisCISource) 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://api.travis-ci.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, "travisci")
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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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// Search for builds related to the query keyword.
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searchURL := fmt.Sprintf("%s/builds?search=%s&limit=5", base, q)
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req, err := http.NewRequestWithContext(ctx, http.MethodGet, searchURL, nil)
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if err != nil {
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continue
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}
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req.Header.Set("Travis-API-Version", "3")
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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 builds travisBuildResponse
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if err := json.NewDecoder(resp.Body).Decode(&builds); 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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for _, b := range builds.Builds {
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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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// Fetch the build log.
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logURL := fmt.Sprintf("%s/builds/%d/log", base, b.ID)
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logReq, err := http.NewRequestWithContext(ctx, http.MethodGet, logURL, nil)
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if err != nil {
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continue
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}
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logReq.Header.Set("Travis-API-Version", "3")
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logReq.Header.Set("Accept", "text/plain")
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logResp, err := client.Do(ctx, logReq)
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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(logResp.Body, 256*1024))
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_ = logResp.Body.Close()
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if err != nil {
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continue
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}
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if ciLogKeyPattern.Match(body) {
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out <- recon.Finding{
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ProviderName: q,
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Source: logURL,
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SourceType: "recon:travisci",
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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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