feat(scanner): surface auth-required signal in fingerprint output (ENG-4226) - #136
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…G-4226) Julius already matches on 401/403 as positive LLM detection but discards the auth status. This adds an AuthRequired field to Result so downstream consumers (Guard wrapper, augustus dispatch) can distinguish open endpoints from credential-gated ones without re-probing.
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Codex Review
Critical Issues
pkg/scanner/scanner.go:170:DoRequestnow discards the error returned bydoRequestWithStatus, so request creation failures, HTTP execution failures, and rule parsing failures are silently reported as(false, nil). This regresses the exported API’s previous error contract.pkg/scanner/scanner.go:162:matchProbeAllonly records the first required request’s status, sorequire: allprobes with a public first check and protected second check are mislabeledauth_required=false. Existing probes likeprobes/flowise.yaml:24andprobes/quivr.yaml:28match 401/403 on later required requests.
Security
No security concerns flagged.
Suggestions
- Add a
require: alltest where the first request returns 200 and a later required request returns 401/403, since the current test only covers 401-first ordering.
Tests not run: go test ./pkg/scanner ./pkg/output failed because the read-only sandbox could not create /home/runner/go for the module cache.
Reviewed by Codex (gpt-5.5)
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Claude Review
Critical issues
DoRequest(exported) now silently swallows errors:matched, _ := s.doRequestWithStatus(...)discards the error, so an HTTP failure or rule-parse error returns(false, nil)instead of(false, err). The old contract distinguished "request failed" from "matched=false"; callers (including external consumers of this public method) can no longer tell a network/connection error apart from a genuine no-match. Restore error propagation, e.g.matched, err := ...; if err != nil { return false, err }.
Security
No security concerns flagged. The change only surfaces a status-derived signal; no crypto/auth logic, new external calls, or input handling is affected.
Test coverage
Adequate — scanner tests cover 401/403/200, fallthrough, require-all, and JSONL serialization; output tests cover both AUTH column states.
Minor (non-blocking)
matchProbeAllderivesauth_requiredsolely from the first request's status. Arequire: allprobe that pairs an open endpoint (request[0], 200) with a gated one (401) will reportauth_required=falsedespite the gating. Fine if intentional, but worth a code comment noting the first-request semantic.
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Included review availability: 8 reviews are currently available. Based on recent review activity, included reviews refill at 10 per hour. WalkthroughThe scanner now returns matched requests with HTTP status codes. Scan results set Merge Risk: ⚪ Minimal · up to This change surfaces the matched endpoint’s authentication requirement in scanner results and output; no actionable merge-blocking risk remains after normal checks and review. ✨ Finishing Touches🧪 Generate unit tests (beta)
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Actionable comments posted: 1
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Inline comments:
In `@pkg/scanner/scanner.go`:
- Around line 170-175: Update Scanner.DoRequest to capture and return the error
from doRequestWithStatus instead of discarding it, while preserving the existing
matched-result mapping for successful calls and the matched == -1 behavior.
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Fix all unresolved CodeRabbit comments on this PR:
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📒 Files selected for processing (5)
pkg/output/output.gopkg/output/output_test.gopkg/scanner/scanner.gopkg/scanner/scanner_test.gopkg/types/result.go
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Gemini Review
Critical Issues
- Broken Contract in Exported
DoRequestMethod: Inpkg/scanner/scanner.go, the updatedScanner.DoRequestmethod silently discards errors returned bydoRequestWithStatus(using the blank identifier_). If a request fails due to network issues, bad URLs, or invalid rules, it now returnsfalse, nilinstead of passing the error back up. This masks underlying failures and breaks error visibility for callers.
Location:pkg/scanner/scanner.goinScanner.DoRequest
Security
No security concerns flagged.
Suggestions
AuthRequiredLogic for Multi-Request Probes: InmatchProbeAll,firstis hardcoded to capture thematchResultof only the first request (i == 0). If a probe usesrequire: alland the first request returns200 OKbut a subsequent request requires authentication (e.g., returning401or403),AuthRequiredwill falsely evaluate tofalse. Consider evaluating auth-related status codes across all successful requests in the chain.
Location:pkg/scanner/scanner.goinScanner.matchProbeAll
Reviewed by Gemini (gemini-3.1-pro-preview)
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| if i == 0 { | ||
| firstReq = req | ||
| first = matchResult{Request: req, StatusCode: statusCode} | ||
| } |
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For require: all probes, this retains only the first response's status, so an authentication response from a later required request is discarded. This occurs in shipped probes: Flowise first matches / with 200 and then /api/v1/chatflows with 401 (probes/flowise.yaml:13-33), while Quivr first matches /openapi.json with 200 and then /brains/ with 403 (probes/quivr.yaml:15-38). Both therefore emit auth_required:false, allowing downstream dispatch to endpoints known to require credentials; aggregate the auth signal across all matched requests while preserving the first request for the existing target metadata.
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| func (s *Scanner) DoRequest(target string, req types.Request) (bool, error) { | ||
| matched, _ := s.doRequestWithStatus(target, req) | ||
| if matched == -1 { | ||
| return false, nil |
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When the HTTP request fails or GetRules rejects a malformed rule, doRequestWithStatus returns (-1, err), but this wrapper discards that error and reports (false, nil). This changes the exported method's prior contract and prevents direct callers from distinguishing an ordinary non-match from network failures or invalid probe rules; propagate the helper's error before interpreting the status code.
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…uire-all requests Two fixes from review: 1. DoRequest was swallowing errors from doRequestWithStatus, turning scanner failures into silent (false, nil). Now propagates the error. 2. matchProbeAll only checked the first request's status for auth. Probes like Flowise (200 on /, 401 on /api/v1/chatflows) and Quivr (200 on /openapi.json, 403 on /brains/) would incorrectly report auth_required=false. Now aggregates: if any matched request returns 401/403, auth_required=true.
Instruction-File Drift DetectionCode changes in this PR may have made documentation stale:
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| Section | Issue | Evidence |
|---|---|---|
| "Architecture > Core Flow" & "Key Packages > Scanner" | New significant feature not documented | Scanner now detects authentication requirements from HTTP 401/403 status codes and surfaces as AuthRequired field in Result struct (pkg/types/result.go +1). Auth detection logic added (pkg/scanner/scanner.go lines 85-86, 127-154), with 20+ comprehensive test cases (scanner_test.go lines 1404+). Table output now includes new "AUTH" column (pkg/output/output.go line 28), and JSON/JSONL output includes auth_required field. This user-observable feature is not mentioned in the documented Core Flow (line 36-42) or Scanner package description (line 47). |
Automated drift check — please review and update if needed.
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Summary
auth_required(bool) field toResultstruct, derived from the HTTP status code of the matched request (401/403 → true, everything else → false)doRequestWithStatus→matchProbeAny/matchProbeAll→Scanwithout changing the publicDoRequestAPIAUTHcolumn to table output (open/required)auth_requiredautomatically via the struct tagJulius already treats 401/403 as positive LLM detection (e.g.,
openai-compatible.yamlmatches on 401 at/v1/models), but the auth signal was discarded before reaching theResult. This surfaces it so Guard can skip or credential-route Augustus dispatch at gated endpoints (parent: ENG-4225).Test plan
go test ./...all green)