Tier 1 of "secure behind a reverse proxy". STRICTLY opt-in so direct/LAN installs
are byte-for-byte unchanged.
- core/security/reverse_proxy.py: apply_reverse_proxy_mode(app, config_get) — a
no-op unless security.trust_reverse_proxy=true. When OFF (default), the app is
untouched: no ProxyFix, X-Forwarded-* stays UNtrusted (a direct client can't
spoof its IP/scheme), session cookie keeps Flask defaults. When ON (operator is
behind nginx/Caddy/Traefik with TLS): trust one proxy hop's X-Forwarded-*, and
mark the session cookie Secure + SameSite=Lax. Any config error → safe no-op,
never breaks startup.
- Wired once at app init.
- Support/REVERSE-PROXY.md: nginx (with the Socket.IO Upgrade headers people
always miss) / Caddy / Traefik configs, the setting, and the "put auth in front
(Authelia/Authentik/oauth2-proxy)" recommendation + the off-for-plain-HTTP note.
Tests: off (and missing-key, and a config exception) is a strict no-op — not
ProxyFix-wrapped, cookie defaults intact; on wraps ProxyFix + secures the cookie;
and the real web_server app is NOT in proxy mode by default. 5 tests pass.
Regression from the #832 server-side launch gate (Beckid). On a PIN-required,
unverified session the gate 401'd /api/setup/status — which the frontend checks
BEFORE the PIN screen. The 401 left setup_complete undefined, so `!undefined`
relaunched the full setup wizard on every visit (cancel → PIN screen worked,
which was the tell).
Two-layer fix:
- Allowlist /api/setup/status in the launch gate (it's a harmless boolean, no
secrets) so the frontend gets the real answer even while locked.
- Make the frontend fail-safe: only launch the wizard on a definitive
setup_complete === false from an OK response — never on a 401/locked/ambiguous
one.
Test: locked session still 401s data endpoints but /api/setup/status returns
{setup_complete:true}; added a gate-allowlist assertion. 21 gate tests pass.
Beckid: the admin launch PIN was a CLIENT-SIDE overlay only. `launch_pin_required`
just told the frontend to draw a fixed div over the app — removing it (Safari
"Hide Distracting Items", devtools, or any non-browser client like curl) gave
full unauthenticated access to every /api/* endpoint, because the server never
checked it. Anyone who reverse-proxies SoulSync publicly was wide open.
Fix: a before_request gate (_enforce_launch_pin) that rejects every request from
an unverified session while security.require_pin_on_launch is on. The decision
is a pure, unit-tested helper (core/security/launch_lock.request_is_locked) so
the allow/deny matrix can't silently regress. Allowed while locked: the page
shell + static assets, the unlock flow (current/list/select/verify/reset/logout),
and the public REST API /api/v1/ (its own @require_api_key governs it) — EXCEPT
/api/v1/api-keys-internal*, the "no auth required" key-management endpoints,
which stay locked so an attacker can't mint an API key and walk in the side door.
Everything else (data, settings, profile create/edit/delete/set-pin, socket.io)
is blocked.
A blocked top-level browser navigation (deep link / refresh on a sub-page like
/dashboard) is redirected to the root lock screen instead of dumping raw JSON —
detected via Sec-Fetch-Mode: navigate / Accept: text/html (is_html_navigation).
Programmatic fetch/XHR still get the JSON 401 so the frontend can react.
Also fixed the verified flag: get_current_profile POPPED launch_pin_verified
(one page load), but an enforced gate needs it to persist — now READ, so
verification lasts the session (until logout/expiry). No-ops entirely when
require_pin_on_launch is off (default).
Tests: full allow/deny matrix + navigation detection. 20 gate tests + 232
profile/security tests pass.
