security: Secure cookie flag (ANIWEB_SECURE, on in run.sh) + kill sessions of deleted accounts

- middleware re-verifies the username against users.json per request:
  deleted accounts' signed cookies are rejected immediately
- set_cookie/delete_cookie honor the Secure flag; run.sh sets
  ANIWEB_SECURE=1 so sessions only work through the HTTPS proxy

README.md

@@ -25,6 +25,12 @@ Account management (no self-signup by design):
 .venv/bin/python -m server.users list          # list users
 ```
 
+Security: passwords are PBKDF2-SHA256 (210k iters, per-user salts) in
+`server/data/users.json` (0600). Sessions are signed 30-day `HttpOnly`
+`SameSite=Lax` cookies; `run.sh` sets `ANIWEB_SECURE=1` so cookies are
+`Secure` and only work through your HTTPS proxy. Accounts deleted via
+the app or CLI are rejected immediately, even with an old cookie.
+
 ## Features
 
 - Per-user accounts (CLI-created, no self-signup): 30-day signed

run.sh

@@ -3,5 +3,7 @@
 cd "$(dirname "$0")" || exit 1
 [ -x .venv/bin/python ] || { echo "no .venv — run: uv venv .venv && uv pip install --python .venv/bin/python -r requirements.txt"; exit 1; }
 pkill -f "uvicorn .*app:app" 2>/dev/null; sleep 1
-nohup .venv/bin/python -m uvicorn server.app:app --host 0.0.0.0 --port 8321 > server.log 2>&1 &
+# ANIWEB_SECURE=1: session cookie is Secure — only usable via the HTTPS
-echo "ani-web on http://localhost:8321 (pid $!)"
+# proxy (plain http://<this machine>:8321 can no longer hold a session).
+ANIWEB_SECURE=1 nohup .venv/bin/python -m uvicorn server.app:app --host 0.0.0.0 --port 8321 > server.log 2>&1 &
+echo "ani-web on http://localhost:8321 (pid $!) — use the HTTPS proxy to log in"

server/app.py

@@ -27,6 +27,7 @@ _SIGNER = TimestampSigner(users.get_secret())
 _SESSION = "aniweb_session"
 _SESSION_AGE = 30 * 86400
 _PUBLIC = {("/login", "GET"), ("/login", "POST")}
+_SECURE = os.environ.get("ANIWEB_SECURE") == "1"  # set when served over HTTPS
 
 # ponytail: in-memory lockout per username, single process — 5 fails -> 15 min
 _lockout: dict = {}
@@ -59,6 +60,10 @@ async def require_auth(request, call_next):
     if (request.url.path, request.method) in _PUBLIC:
         return await call_next(request)
     user = _session_user(request)
+    # stateless cookie -> re-verify the account still exists, so
+    # deleted users' cookies die immediately
+    if user is not None and user not in users.load():
+        user = None
     if not user:
         if request.url.path.startswith("/api/"):
             return JSONResponse({"detail": "not authenticated"}, status_code=401)
@@ -70,7 +75,7 @@ async def require_auth(request, call_next):
 
 def _session_cookie(resp, user: str):
     resp.set_cookie(_SESSION, _SIGNER.sign(b"user:" + user.encode()).decode(),
-                    max_age=_SESSION_AGE, httponly=True, samesite="lax")
+                    max_age=_SESSION_AGE, httponly=True, samesite="lax", secure=_SECURE)
 
 
 @app.get("/login", include_in_schema=False)
@@ -102,14 +107,14 @@ def api_me(request: Request):
 def delete_account(request: Request):
     users.remove(request.state.user)
     resp = JSONResponse({"ok": True})
-    resp.delete_cookie(_SESSION)
+    resp.delete_cookie(_SESSION, secure=_SECURE)
     return resp
 
 
 @app.post("/logout")
 def logout():
     resp = JSONResponse({"ok": True})
-    resp.delete_cookie(_SESSION)
+    resp.delete_cookie(_SESSION, secure=_SECURE)
     return resp
 
 

tests/test_api.py

@@ -119,6 +119,8 @@ def test_self_delete(base=BASE):
     jar = login("dave", "davepw12345", base)
     assert req("POST", "/account/delete", jar=jar, base=base) == 200
     assert "dave" not in json.load(open(_users_file()))
+    # old session cookie is dead immediately (middleware re-checks existence)
+    assert req("GET", "/api/me", jar=jar, base=base) == 401
     jar2 = CJ()
     assert req("POST", "/login", {"username": "dave", "password": "davepw12345"}, jar2, base=base) == 401