#622 reported "I cant even paste that hash pw and granted So auth_en
=false & localbypass= true But then the host still is showing login
page?" — the operator turned auth off in .env and still gets bounced
to /login on every page load. The flow:
The auth middleware in app.py is correctly gated on AUTH_ENABLED, so
the middleware itself does not install when AUTH_ENABLED=false. The
SPA front-end at static/app.js wraps window.fetch and redirects to
/login on ANY 401 response from any API call. So all it takes for the
operator to see a login page is one route-level 401.
src/auth_helpers.require_user — the shared FastAPI dependency mounted
on ~50 routes (email, contacts, personal, …) — was the source. It is
documented as defense-in-depth in case the middleware was bypassed
unexpectedly (SSRF from a sibling service), but the implementation
treated AUTH_ENABLED=false as one of those unexpected bypasses and
401'd anyway. The loopback fall-through that would have admitted the
operator does not fire under docker compose / a reverse proxy because
the container sees the request arriving from the bridge gateway
(172.x.x.x), not 127.0.0.1.
require_user now short-circuits to "" when AUTH_ENABLED=false so the
explicit operator opt-out reaches the route layer too. While in the
file, also mirror LOCALHOST_BYPASS=true the same way for loopback
callers — the middleware already lets them through, and routes 401'ing
the same caller would produce the same /login bounce. Non-loopback
callers under LOCALHOST_BYPASS are still rejected, matching the
middleware's _is_trusted_loopback check.
Add three focused regression tests in tests/test_security_regressions.py:
docker-bridge caller is admitted under AUTH_ENABLED=false, loopback
caller is admitted under LOCALHOST_BYPASS=true, LAN caller under
LOCALHOST_BYPASS=true is still rejected. The existing
test_require_user_rejects_unauthenticated and
test_require_user_accepts_loopback_when_unconfigured tests continue to
pass because neither sets AUTH_ENABLED, so the AUTH_ENABLED=true
default path is unchanged.
Closes#622.
c1df31fda5