Files
homelable/backend/tests/test_auth.py
Pouzor 21a64e52ab fix(auth): accept the app's own origin in the OIDC CSRF check
A same-origin deployment behind a reverse proxy needs no CORS, so
CORS_ORIGINS is left at its localhost default — but browsers still send
Origin on unsafe methods, and OIDCCSRFMiddleware validated it against
CORS_ORIGINS alone. Every POST/PUT/DELETE came back 403 while reads
worked, so creating a canvas failed with no usable error.

The OIDC callback URL is served by this app, so the origin of
OIDC_REDIRECT_URI is the app's own and is always a legitimate CSRF
origin. origin_is_allowed now accepts it in addition to CORS_ORIGINS,
and settings validation warns at startup when CORS_ORIGINS omits it so
the misconfiguration is visible rather than silent.

Fixes #356

ha-relevant: no
2026-08-17 20:13:04 +02:00

498 lines
18 KiB
Python

import time
from unittest.mock import AsyncMock, patch
from urllib.parse import parse_qs, urlparse
import pytest
from authlib.integrations.base_client.errors import OAuthError
from authlib.jose.errors import ExpiredTokenError, JoseError
from fastapi import WebSocketDisconnect
from httpx import AsyncClient
from starlette.responses import RedirectResponse
from starlette.testclient import TestClient
class FakeOIDCClient:
def __init__(self, token=None, error: OAuthError | JoseError | None = None):
self.token = token or {}
self.error = error
self.redirect_uri: str | None = None
async def authorize_redirect(self, _request, redirect_uri: str):
self.redirect_uri = redirect_uri
return RedirectResponse("https://idp.example/application/o/authorize/?state=test", status_code=302)
async def authorize_access_token(self, _request):
if self.error is not None:
raise self.error
return self.token
@pytest.fixture
def oidc_settings():
from app.core.config import settings
from app.core.security import _build_oidc_client
values = {
"auth_mode": "oidc",
"oidc_discovery_url": "https://idp.example/application/o/homelable/.well-known/openid-configuration",
"oidc_client_id": "homelable",
"oidc_client_secret": "test-client-secret",
"oidc_redirect_uri": "http://test/api/v1/auth/oidc/callback",
"oidc_scopes": "openid profile email",
"oidc_cookie_secure": False,
"oidc_session_expire_minutes": 60,
"cors_origins": ["http://test"],
}
original = {name: getattr(settings, name) for name in values}
for name, value in values.items():
setattr(settings, name, value)
_build_oidc_client.cache_clear()
yield settings
for name, value in original.items():
setattr(settings, name, value)
_build_oidc_client.cache_clear()
async def test_login_success(client: AsyncClient):
res = await client.post("/api/v1/auth/login", json={"username": "admin", "password": "admin"})
assert res.status_code == 200
data = res.json()
assert "access_token" in data
assert data["token_type"] == "bearer"
async def test_auth_config_defaults_to_local(client: AsyncClient):
res = await client.get("/api/v1/auth/config")
assert res.status_code == 200
assert res.json() == {"mode": "local", "oidc_login_url": None}
async def test_login_wrong_password(client: AsyncClient):
res = await client.post("/api/v1/auth/login", json={"username": "admin", "password": "wrong"})
assert res.status_code == 401
async def test_login_wrong_username(client: AsyncClient):
res = await client.post("/api/v1/auth/login", json={"username": "notadmin", "password": "admin"})
assert res.status_code == 401
async def test_protected_route_requires_auth(client: AsyncClient):
res = await client.get("/api/v1/nodes")
assert res.status_code == 401
async def test_health_is_public(client: AsyncClient):
res = await client.get("/api/v1/health")
assert res.status_code == 200
assert res.json() == {"status": "ok"}
# --- MCP service key auth ---
@pytest.fixture
def with_service_key():
from app.core.config import settings
settings.mcp_service_key = "test-service-key"
yield "test-service-key"
settings.mcp_service_key = ""
async def test_service_key_grants_access(client: AsyncClient, with_service_key):
res = await client.get("/api/v1/nodes", headers={"X-MCP-Service-Key": with_service_key})
assert res.status_code == 200
async def test_service_key_wrong_value(client: AsyncClient, with_service_key):
res = await client.get("/api/v1/nodes", headers={"X-MCP-Service-Key": "wrong-key"})
assert res.status_code == 401
async def test_service_key_disabled_when_not_configured(client: AsyncClient):
from app.core.config import settings
settings.mcp_service_key = ""
res = await client.get("/api/v1/nodes", headers={"X-MCP-Service-Key": "any-key"})
assert res.status_code == 401
async def test_login_with_malformed_hash_returns_401_not_500(client: AsyncClient):
"""Malformed hash (e.g. $ stripped by shell) must not crash with 500."""
from app.core.config import settings
original = settings.auth_password_hash
settings.auth_password_hash = "2b12RtMbyw17l4N5UGzeXMNAWu" # $ signs stripped
try:
res = await client.post("/api/v1/auth/login", json={"username": "admin", "password": "admin"})
assert res.status_code == 401
finally:
settings.auth_password_hash = original
# --- JWT-level cases ---
async def test_expired_token_rejected(client: AsyncClient):
"""A JWT whose `exp` is in the past must be refused."""
from datetime import datetime, timedelta, timezone
import jwt
from app.core.config import settings
payload = {
"sub": "admin",
"exp": datetime.now(timezone.utc) - timedelta(minutes=1),
}
token = jwt.encode(payload, settings.secret_key, algorithm=settings.algorithm)
res = await client.get("/api/v1/nodes", headers={"Authorization": f"Bearer {token}"})
assert res.status_code == 401
async def test_malformed_token_rejected(client: AsyncClient):
res = await client.get("/api/v1/nodes", headers={"Authorization": "Bearer not-a-jwt"})
assert res.status_code == 401
async def test_token_signed_with_wrong_secret_rejected(client: AsyncClient):
"""A token signed with a different key must not be accepted."""
from datetime import datetime, timedelta, timezone
import jwt
from app.core.config import settings
payload = {
"sub": "admin",
"exp": datetime.now(timezone.utc) + timedelta(minutes=5),
}
forged = jwt.encode(payload, "different-secret-that-is-at-least-32-bytes", algorithm=settings.algorithm)
res = await client.get("/api/v1/nodes", headers={"Authorization": f"Bearer {forged}"})
assert res.status_code == 401
async def test_missing_authorization_header_rejected(client: AsyncClient):
res = await client.get("/api/v1/nodes")
assert res.status_code == 401
async def test_empty_password_does_not_pass_when_hash_empty(client: AsyncClient):
"""No credentials configured server-side must not authenticate an empty password."""
from app.core.config import settings
original_hash = settings.auth_password_hash
settings.auth_password_hash = ""
try:
res = await client.post("/api/v1/auth/login", json={"username": "admin", "password": ""})
assert res.status_code == 401
finally:
settings.auth_password_hash = original_hash
# --- Password helper ---
def test_verify_password_handles_empty_inputs():
"""verify_password must be safe against empty plain / empty hash without raising."""
from app.core.security import hash_password, verify_password
h = hash_password("hunter2")
assert verify_password("hunter2", h) is True
assert verify_password("", h) is False
assert verify_password("hunter2", "") is False
assert verify_password("", "") is False
# --- OpenID Connect ---
async def test_oidc_config_exposes_login_url(client: AsyncClient, oidc_settings):
res = await client.get("/api/v1/auth/config")
assert res.status_code == 200
assert res.json() == {
"mode": "oidc",
"oidc_login_url": "/api/v1/auth/oidc/login",
}
async def test_local_login_is_disabled_in_oidc_mode(client: AsyncClient, oidc_settings):
res = await client.post("/api/v1/auth/login", json={"username": "admin", "password": "admin"})
assert res.status_code == 404
async def test_oidc_login_is_hidden_in_local_mode(client: AsyncClient):
res = await client.get("/api/v1/auth/oidc/login")
assert res.status_code == 404
async def test_oidc_login_uses_configured_callback(client: AsyncClient, oidc_settings):
fake_client = FakeOIDCClient()
with patch("app.api.routes.auth.get_oidc_client", return_value=fake_client):
res = await client.get("/api/v1/auth/oidc/login")
assert res.status_code == 302
assert res.headers["location"].startswith("https://idp.example/")
assert fake_client.redirect_uri == "http://test/api/v1/auth/oidc/callback"
async def test_oidc_client_enables_pkce_s256_and_nonce(oidc_settings):
from app.core.security import get_oidc_client
oidc_client = get_oidc_client()
metadata = {"authorization_endpoint": "https://idp.example/application/o/authorize/"}
with patch.object(oidc_client, "load_server_metadata", AsyncMock(return_value=metadata)):
authorization = await oidc_client.create_authorization_url(oidc_settings.oidc_redirect_uri)
query = parse_qs(urlparse(authorization["url"]).query)
assert query["response_type"] == ["code"]
assert query["code_challenge_method"] == ["S256"]
assert "code_challenge" in query
assert "code_verifier" not in query
assert query["nonce"] == [authorization["nonce"]]
assert authorization["code_verifier"]
async def test_oidc_callback_creates_session_for_api(client: AsyncClient, oidc_settings):
fake_client = FakeOIDCClient(token={
"userinfo": {
"iss": "https://idp.example/application/o/homelable/",
"sub": "user-123",
"preferred_username": "alice",
},
})
with patch("app.api.routes.auth.get_oidc_client", return_value=fake_client):
callback = await client.get("/api/v1/auth/oidc/callback")
assert callback.status_code == 303
assert callback.headers["location"] == "/"
cookie = callback.headers["set-cookie"]
assert "homelable-session=" in cookie
assert "HttpOnly" in cookie
assert "SameSite=lax" in cookie
me = await client.get("/api/v1/auth/me")
assert me.status_code == 200
assert me.json()["subject"] == "user-123"
assert me.json()["display_name"] == "alice"
assert me.json()["auth_method"] == "oidc"
assert me.json()["issuer"] == "https://idp.example/application/o/homelable/"
assert me.json()["csrf_token"]
protected = await client.get("/api/v1/nodes")
assert protected.status_code == 200
@pytest.mark.parametrize("userinfo", [None, {}, {"sub": "user-123"}, {"iss": "https://idp.example/"}])
async def test_oidc_callback_rejects_missing_identity_claims(client: AsyncClient, oidc_settings, userinfo):
token = {} if userinfo is None else {"userinfo": userinfo}
fake_client = FakeOIDCClient(token=token)
with patch("app.api.routes.auth.get_oidc_client", return_value=fake_client):
res = await client.get("/api/v1/auth/oidc/callback")
assert res.status_code == 401
assert res.json() == {"detail": "OIDC authentication failed"}
async def test_oidc_callback_hides_protocol_error_details(client: AsyncClient, oidc_settings):
fake_client = FakeOIDCClient(error=OAuthError(error="invalid_grant", description="sensitive detail"))
with patch("app.api.routes.auth.get_oidc_client", return_value=fake_client):
res = await client.get("/api/v1/auth/oidc/callback")
assert res.status_code == 401
assert res.json() == {"detail": "OIDC authentication failed"}
assert "sensitive detail" not in res.text
async def test_oidc_callback_hides_claim_validation_error_details(client: AsyncClient, oidc_settings):
fake_client = FakeOIDCClient(error=ExpiredTokenError())
with patch("app.api.routes.auth.get_oidc_client", return_value=fake_client):
res = await client.get("/api/v1/auth/oidc/callback")
assert res.status_code == 401
assert res.json() == {"detail": "OIDC authentication failed"}
assert "expired" not in res.text.lower()
async def test_oidc_session_token_cannot_be_used_as_bearer(client: AsyncClient, oidc_settings):
from app.core.security import create_oidc_session_token
token = create_oidc_session_token({"iss": "https://idp.example/", "sub": "user-123"})
res = await client.get("/api/v1/nodes", headers={"Authorization": f"Bearer {token}"})
assert res.status_code == 401
async def test_oidc_cookie_mutations_require_csrf_and_allowed_origin(client: AsyncClient, oidc_settings):
fake_client = FakeOIDCClient(token={
"userinfo": {
"iss": "https://idp.example/application/o/homelable/",
"sub": "user-123",
"preferred_username": "alice",
},
})
with patch("app.api.routes.auth.get_oidc_client", return_value=fake_client):
await client.get("/api/v1/auth/oidc/callback")
csrf_token = (await client.get("/api/v1/auth/me")).json()["csrf_token"]
missing = await client.post("/api/v1/auth/logout")
assert missing.status_code == 403
wrong_origin = await client.post(
"/api/v1/auth/logout",
headers={"Origin": "https://evil.example", "X-Homelable-CSRF": csrf_token},
)
assert wrong_origin.status_code == 403
valid = await client.post(
"/api/v1/auth/logout",
headers={"Origin": "http://test", "X-Homelable-CSRF": csrf_token},
)
assert valid.status_code == 204
assert "Max-Age=0" in valid.headers["set-cookie"]
assert (await client.get("/api/v1/auth/me")).status_code == 401
async def test_oidc_mutation_allows_app_origin_missing_from_cors_origins(
client: AsyncClient, oidc_settings
):
"""Regression for #356: a same-origin reverse-proxy deploy needs no CORS, so
CORS_ORIGINS is left at its localhost default while the browser still sends
Origin — every POST used to 403."""
oidc_settings.cors_origins = ["http://localhost:5173", "http://localhost:3000"]
fake_client = FakeOIDCClient(token={
"userinfo": {
"iss": "https://idp.example/application/o/homelable/",
"sub": "user-123",
"preferred_username": "alice",
},
})
with patch("app.api.routes.auth.get_oidc_client", return_value=fake_client):
await client.get("/api/v1/auth/oidc/callback")
csrf_token = (await client.get("/api/v1/auth/me")).json()["csrf_token"]
created = await client.post(
"/api/v1/designs",
json={"name": "From OIDC", "design_type": "network"},
headers={"Origin": "http://test", "X-Homelable-CSRF": csrf_token},
)
assert created.status_code == 201
# The fallback widens the allowlist by exactly one origin, nothing more.
evil = await client.post(
"/api/v1/designs",
json={"name": "Nope", "design_type": "network"},
headers={"Origin": "https://evil.example", "X-Homelable-CSRF": csrf_token},
)
assert evil.status_code == 403
def test_origin_is_allowed_falls_back_to_the_oidc_redirect_origin(oidc_settings):
from app.core.security import origin_is_allowed
oidc_settings.cors_origins = ["http://localhost:3000"]
oidc_settings.oidc_redirect_uri = "https://homelable.example.com/api/v1/auth/oidc/callback"
assert origin_is_allowed("https://homelable.example.com") is True
assert origin_is_allowed("https://homelable.example.com/") is True
assert origin_is_allowed("http://localhost:3000") is True
assert origin_is_allowed("https://evil.example") is False
assert origin_is_allowed(None) is False
# A redirect URI that is not an absolute URL contributes no origin.
oidc_settings.oidc_redirect_uri = "/api/v1/auth/oidc/callback"
assert origin_is_allowed("https://homelable.example.com") is False
def test_oidc_settings_warn_when_cors_origins_omits_the_app_origin(caplog):
from app.core.config import Settings
base = {
"secret_key": "x" * 32,
"auth_mode": "oidc",
"oidc_discovery_url": "https://idp.example/.well-known/openid-configuration",
"oidc_client_id": "homelable",
"oidc_client_secret": "secret",
"oidc_redirect_uri": "https://homelable.example.com/api/v1/auth/oidc/callback",
}
with caplog.at_level("WARNING"):
Settings(**base, cors_origins=["http://localhost:3000"])
assert "https://homelable.example.com" in caplog.text
assert "CORS_ORIGINS" in caplog.text
caplog.clear()
with caplog.at_level("WARNING"):
Settings(**base, cors_origins=["https://homelable.example.com/"])
assert caplog.text == ""
async def test_local_bearer_logout_does_not_require_csrf(client: AsyncClient, headers):
res = await client.post("/api/v1/auth/logout", headers=headers)
assert res.status_code == 204
# --- WebSocket authentication ---
def _wait_for_connection_count(expected: int) -> None:
from app.api.routes import status as status_routes
deadline = time.monotonic() + 1
while len(status_routes._connections) != expected and time.monotonic() < deadline:
time.sleep(0.01)
assert len(status_routes._connections) == expected
def test_local_websocket_keeps_first_message_bearer_flow():
from app.core.security import create_access_token
from app.main import app
test_client = TestClient(app)
try:
with test_client.websocket_connect(
"/api/v1/status/ws/status",
headers={"Origin": "http://localhost:3000"},
) as websocket:
websocket.send_json({"token": create_access_token("admin")})
_wait_for_connection_count(1)
_wait_for_connection_count(0)
finally:
test_client.close()
def test_websocket_rejects_untrusted_origin_before_auth():
from app.main import app
test_client = TestClient(app)
try:
with (
pytest.raises(WebSocketDisconnect) as caught,
test_client.websocket_connect(
"/api/v1/status/ws/status",
headers={"Origin": "https://evil.example"},
) as websocket,
):
websocket.receive_text()
assert caught.value.code == 1008
finally:
test_client.close()
def test_oidc_websocket_uses_session_cookie_without_javascript_token(oidc_settings):
from app.core.security import create_oidc_session_token, oidc_session_cookie_name
from app.main import app
session_token = create_oidc_session_token({"iss": "https://idp.example/", "sub": "user-123"})
test_client = TestClient(app)
test_client.cookies.set(oidc_session_cookie_name(), session_token)
try:
with test_client.websocket_connect(
"/api/v1/status/ws/status",
headers={"Origin": "http://test"},
):
_wait_for_connection_count(1)
_wait_for_connection_count(0)
finally:
test_client.close()
def test_oidc_websocket_rejects_missing_session_cookie(oidc_settings):
from app.main import app
test_client = TestClient(app)
try:
with (
pytest.raises(WebSocketDisconnect) as caught,
test_client.websocket_connect(
"/api/v1/status/ws/status",
headers={"Origin": "http://test"},
) as websocket,
):
websocket.receive_text()
assert caught.value.code == 1008
finally:
test_client.close()