julien
0e6c114ba7
## Summary Closes the phase-2 hardening list that `main.ts` has been advertising since the security PR (#122). Two new middlewares + one alignment pass on the response shape so every BFF error follows a single contract. ### Structured error filter A global `ExceptionFilter` (registered via `app.useGlobalFilters(...)` at the top of `bootstrap()`) normalises every 4xx/5xx response to a single envelope : ```json { "error": { "code": "csrf", "message": "CSRF token missing or invalid", "traceId": "abc123…" } } ``` - `code` — stable token the SPA can `switch` on. Either explicit on the `HttpException`'s response object (`new UnauthorizedException({ code: 'unauthenticated', message: '...' })`) or derived from the status (`STATUS_CODE_MAP` for the common cases, `'http_error'` fallback). 500s always use `'internal'`. - `message` — safe human-readable text. **500s never leak the underlying exception** (the full message + stack go to the Pino `error` log line as `err: exception` — Pino's stack-serialiser does the rest). - `traceId` — current OTel trace id (or `null` when no span is active). Makes cross-correlation with the audit log + Pino lines trivial. An exported `errorResponse(code, message)` helper produces the same envelope for code paths that write the response directly (raw Express middlewares like the CSRF one, the rate-limit handler) — single contract everywhere. ### Rate limiting `express-rate-limit` mounted after the session middleware: - **Dynamic max per request**: 10/min on `/api/auth/login` + `/api/auth/callback` (`RATE_LIMIT_AUTH_PER_MINUTE` env), 120/min everywhere else (`RATE_LIMIT_PER_MINUTE`). - **Bucket key** = session id when the request carries an active session, remote IP otherwise. A single attacker can't dodge the limit by rotating sessions; an authenticated user gets per-account fairness regardless of source IP. - **`/api/health` is skipped** so orchestrator polls don't burn the user quota. - 429 response uses the same envelope as everything else (`{ error: { code: 'rate_limited', … } }`) via the shared `errorResponse()` helper. - In-memory store (single-instance v1 per ADR-0015). Redis-backed store is a one-line config change when we scale out. ### Alignment pass - **CSRF middleware** previously returned `{ error: 'csrf' }`. Now returns the full envelope via `errorResponse('csrf', 'CSRF token missing or invalid')`. - **`/auth/me` 401** previously wrote `{ error: 'unauthenticated' }` directly. Now throws `UnauthorizedException({ code: 'unauthenticated', message: 'Unauthenticated' })` so the filter formats it. Identical response shape on the wire as the CSRF path. Both spec assertions updated to the new shape. ### Type-resolution fix (transitive) `@types/express@4.17.25` was being pulled in transitively by `http-proxy-middleware` (Nx's webpack-dev-server). `express-rate-limit`'s `.d.ts` files import `'express'` and the type resolver was matching the v4 copy, causing `Request` type mismatches with our v5-based code. Added `"@types/express": "^5.0.6"` to `pnpm.overrides` so the workspace pins a single version everywhere. ## Notable choices **`StructuredErrorFilter` is the source of truth, but raw middlewares are still allowed to write responses directly** (rate-limit, CSRF). The reason: Nest's filter chain only handles exceptions thrown from controllers/guards/interceptors. Express middleware short-circuits before that. Both paths now use the same envelope shape through the `errorResponse()` helper. **No `traceId` in non-5xx responses?** It IS included. The filter writes it on every status — useful for any client-server debugging conversation ("send me your traceId from the 403 you got"). **500s strip the exception message.** Even if a developer accidentally surfaces a sensitive detail via `throw new Error('connection to postgres://user:secret@host failed')`, the response body just says "Internal server error". The full message goes to the log — visible to ops, never to clients. This is the standard secure-by-default for unhandled errors. **Dynamic `max` per request, not two separate `rateLimit()` instances.** Two instances would each maintain a separate store, so the `/auth/login` bucket would be independent of the general one for the same IP. A single instance with a path-conditional max gives consistent bucket accounting. ## Out of scope - Redis-backed rate-limit store. v1 ships in-memory; the BFF runs as a single instance. The migration is `new RedisStore({ ... })` when we scale out (ADR-0015 mentions this). - Per-user override of `RATE_LIMIT_PER_MINUTE` (e.g. admins / service accounts with higher quotas). No code path for this in v1. - CSP fine-tuning for portal-shell + portal-admin once Caddy serves them. ## Test plan - [x] `pnpm nx test portal-bff` (clean env) → **199/199 pass** (+25 specs: StructuredErrorFilter, rate-limit middleware, CSRF + /me alignments). - [x] `pnpm nx test feature-auth` (clean env) → **28/28 pass**. - [x] `pnpm nx test portal-shell` (clean env) → **34/34 pass**. - [x] `pnpm nx run-many -t lint build --projects=portal-bff,feature-auth,portal-shell` → clean. - [x] Prettier-clean. - [x] CI clean-env repro: every env var unset (including new `RATE_LIMIT_*`) → 261/261 pass. - [ ] Manual smoke against running BFF: - [ ] Throw any error from a controller → response is `{ error: { code, message, traceId } }`. Pino log has the full exception under `err`. - [ ] Curl `/api/auth/me` without a session cookie → 401 + same envelope, `code: 'unauthenticated'`. - [ ] Hit `/api/auth/login` 11 times in a minute → 11th returns 429 + `code: 'rate_limited'`. `/api/health` hit 100 times → all 200. - [ ] POST without `X-CSRF-Token` → 403 + `code: 'csrf'`. --------- Co-authored-by: Julien Gautier <julien.gautier@apf.asso.fr> Reviewed-on: #123
168 lines
5.3 KiB
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168 lines
5.3 KiB
JSON
{
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"name": "apf-portal",
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"version": "0.0.0",
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"license": "MIT",
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"ci:commits": "pnpm exec commitlint --from ${COMMIT_LINT_FROM:-origin/main} --to HEAD --verbose",
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"ci:perf": "pnpm exec nx build portal-shell --configuration=production && pnpm exec lhci autorun --config=./lighthouserc.js"
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},
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"lint-staged": {
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},
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"nx",
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