Files
webmail-client/backend/app/identity/deps.py
T
lukasandClaude Opus 5 8fce86559e Admin panel on its own port, and a registration gate
Three strands that only make sense together, so they land together.

Registration gate (migration 0016). POST /auth/register was open to anyone
who could reach the port. Now the first account on an empty instance is
always allowed, becomes the administrator, and closes registration behind
itself; after that it takes an admin reopening it. The decision is made
under a row lock on app_settings so two simultaneous first signups cannot
both see an empty table and both claim administrator. Existing installs
keep their oldest account as admin and start closed.

Instance default quota (migration 0017). users.quota_bytes is snapshotted
at creation from app_settings.default_quota_bytes, so changing the default
affects later accounts only and never resizes a mailbox that exists.

The panel is a separate app, not a page in the mail client. admin.html is
its own Vite entry (5.8 KB next to the client's 1.7 MB; they share only the
vendor chunk), with its own administrator sign-in. One nginx now serves two
listeners: :80 is the mail client and 404s both /admin.html and
/api/admin/*, :81 is the panel. docker-compose publishes them as WEB_PORT
and ADMIN_PORT. The boundary is nginx refusing paths on one listener, not
process isolation — CurrentAdmin still guards every admin route — so
ADMIN_PORT must be restricted to the LAN, which the runbook now covers for
both DSM and QNAP.

Also QNAP: deploy/webmail.sh finds Container Station's docker under
/share/*/.qpkg/container-station/bin, which is off an SSH session's PATH,
before anything shells out to it. docs/nas-install.md gains a QuTS hero
runbook (§2.6), splits the DSM firewall section into container-to-container
(§8.1) and the egress case that makes account-add time out while
autodiscovery appears to work (§8.2), and scopes both to Synology.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_018SqJYt7jD7oUEkoY68sBZo
2026-09-16 20:34:08 +02:00

59 lines
2.2 KiB
Python

"""Auth dependencies: current user and CSRF enforcement (SPEC §6.1, §10.3)."""
from __future__ import annotations
from typing import Annotated
from fastapi import Depends, Request
from sqlalchemy import select
from sqlalchemy.ext.asyncio import AsyncSession
from app.api.errors import raise_api_error
from app.db import get_session
from app.identity.cookies import CSRF_HEADER, csrf_cookie_name, read_session_token
from app.identity.sessions import Session, resolve_session
from app.models import User
async def current_session(request: Request) -> Session:
"""Resolve the caller's session or raise 401."""
token = read_session_token(request)
session = await resolve_session(token)
if session is None:
raise_api_error(401, "not_authenticated", "authentication required")
return session
async def current_user(
session: Annotated[Session, Depends(current_session)],
db: Annotated[AsyncSession, Depends(get_session)],
) -> User:
"""Load the authenticated :class:`User` (I-7: scoped by the session's user_id)."""
user = await db.scalar(select(User).where(User.id == session.user_id))
if user is None:
# Session references a deleted user; treat as unauthenticated.
raise_api_error(401, "not_authenticated", "authentication required")
return user
async def require_csrf(request: Request) -> None:
"""Enforce the double-submit CSRF token on mutating requests (SPEC §10.3)."""
if request.method in ("GET", "HEAD", "OPTIONS"):
return
header = request.headers.get(CSRF_HEADER, "")
cookie = request.cookies.get(csrf_cookie_name(request), "")
if not header or not cookie or header != cookie:
raise_api_error(403, "csrf_failed", "missing or invalid CSRF token")
async def current_admin(user: Annotated[User, Depends(current_user)]) -> User:
"""Load the authenticated user and require the administrator flag."""
if not user.is_admin:
raise_api_error(403, "not_admin", "administrator privileges required")
return user
CurrentUser = Annotated[User, Depends(current_user)]
CurrentAdmin = Annotated[User, Depends(current_admin)]
CurrentSession = Annotated[Session, Depends(current_session)]