Adds defence-in-depth shared-secret auth that activates when API_KEY
is set. Behaviour:
- empty API_KEY (dev default): every request allowed, middleware is
not even installed;
- non-empty API_KEY: every request under APP_API_PREFIX except
/health must carry X-API-Key: <value> or
Authorization: Bearer <value>. /, /docs, /redoc, /openapi.json and
CORS preflight stay open. hmac.compare_digest is used for the
constant-time comparison.
The middleware resolves settings lazily so test fixtures can reload
app.config and have the new API_KEY take effect on the next install.
Tests (tests/test_api_security.py, 5 cases):
- /health remains open;
- protected route rejects missing key (401);
- protected route accepts X-API-Key header;
- protected route accepts Authorization: Bearer header;
- protected route rejects a wrong key.
Frontend:
- VITE_API_KEY env reads the key and Axios injects it on every
request, falling back to no header when empty so SSO/reverse-proxy
deployments stay unchanged.
- vite-env.d.ts adds the new env entry.
Docs/ops:
- .env.example documents the dev-default empty key;
- .env.prod.example marks API_KEY as a required rotation point;
- docker-compose.yml forwards API_KEY (defaults to empty);
- docker-compose.prod.yml fails the stack with ?:required when API_KEY
is missing;
- RUNBOOK gains an API authentication section with header examples
and the reverse-proxy + key layering recommendation.
pytest -q: 33 passed (5 new security + 28 prior).
npx tsc --noEmit: clean.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
