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#
# This file is licensed under the Affero General Public License (AGPL) version 3.
#
# Copyright (C) 2023 New Vector, Ltd
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as
# published by the Free Software Foundation, either version 3 of the
# License, or (at your option) any later version.
#
# See the GNU Affero General Public License for more details:
# <https://www.gnu.org/licenses/agpl-3.0.html>.
#
# Originally licensed under the Apache License, Version 2.0:
# <http://www.apache.org/licenses/LICENSE-2.0>.
#
# [This file includes modifications made by New Vector Limited]
#
#
from typing import Any, Dict
from unittest.mock import AsyncMock, Mock
from twisted.test.proto_helpers import MemoryReactor
from synapse.handlers.cas import CasResponse
from synapse.server import HomeServer
from synapse.util import Clock
from tests.unittest import HomeserverTestCase, override_config
# These are a few constants that are used as config parameters in the tests.
BASE_URL = "https://synapse/"
SERVER_URL = "https://issuer/"
class CasHandlerTestCase(HomeserverTestCase):
def default_config(self) -> Dict[str, Any]:
config = super().default_config()
config["public_baseurl"] = BASE_URL
cas_config = {
"enabled": True,
"server_url": SERVER_URL,
"service_url": BASE_URL,
}
# Update this config with what's in the default config so that
# override_config works as expected.
cas_config.update(config.get("cas_config", {}))
config["cas_config"] = cas_config
return config
def make_homeserver(self, reactor: MemoryReactor, clock: Clock) -> HomeServer:
hs = self.setup_test_homeserver()
self.handler = hs.get_cas_handler()
# Reduce the number of attempts when generating MXIDs.
sso_handler = hs.get_sso_handler()
sso_handler._MAP_USERNAME_RETRIES = 3
return hs
def test_map_cas_user_to_user(self) -> None:
"""Ensure that mapping the CAS user returned from a provider to an MXID works properly."""
# stub out the auth handler
auth_handler = self.hs.get_auth_handler()
auth_handler.complete_sso_login = AsyncMock() # type: ignore[method-assign]
cas_response = CasResponse("test_user", {})
request = _mock_request()
self.get_success(
self.handler._handle_cas_response(request, cas_response, "redirect_uri", "")
)
# check that the auth handler got called as expected
auth_handler.complete_sso_login.assert_called_once_with(
"@test_user:test",
"cas",
request,
"redirect_uri",
None,
new_user=True,
auth_provider_session_id=None,
)
def test_map_cas_user_to_existing_user(self) -> None:
"""Existing users can log in with CAS account."""
store = self.hs.get_datastores().main
self.get_success(
store.register_user(user_id="@test_user:test", password_hash=None)
)
# stub out the auth handler
auth_handler = self.hs.get_auth_handler()
auth_handler.complete_sso_login = AsyncMock() # type: ignore[method-assign]
# Map a user via SSO.
cas_response = CasResponse("test_user", {})
request = _mock_request()
self.get_success(
self.handler._handle_cas_response(request, cas_response, "redirect_uri", "")
)
# check that the auth handler got called as expected
auth_handler.complete_sso_login.assert_called_once_with(
"@test_user:test",
"cas",
request,
"redirect_uri",
None,
new_user=False,
auth_provider_session_id=None,
)
# Subsequent calls should map to the same mxid.
auth_handler.complete_sso_login.reset_mock()
self.get_success(
self.handler._handle_cas_response(request, cas_response, "redirect_uri", "")
)
auth_handler.complete_sso_login.assert_called_once_with(
"@test_user:test",
"cas",
request,
"redirect_uri",
None,
new_user=False,
auth_provider_session_id=None,
)
def test_map_cas_user_to_invalid_localpart(self) -> None:
"""CAS automaps invalid characters to base-64 encoding."""
# stub out the auth handler
auth_handler = self.hs.get_auth_handler()
auth_handler.complete_sso_login = AsyncMock() # type: ignore[method-assign]
cas_response = CasResponse("föö", {})
request = _mock_request()
self.get_success(
self.handler._handle_cas_response(request, cas_response, "redirect_uri", "")
)
# check that the auth handler got called as expected
auth_handler.complete_sso_login.assert_called_once_with(
"@f=c3=b6=c3=b6:test",
"cas",
request,
"redirect_uri",
None,
new_user=True,
auth_provider_session_id=None,
)
@override_config(
{
"cas_config": {
"required_attributes": {"userGroup": "staff", "department": None}
}
}
)
def test_required_attributes(self) -> None:
"""The required attributes must be met from the CAS response."""
# stub out the auth handler
auth_handler = self.hs.get_auth_handler()
auth_handler.complete_sso_login = AsyncMock() # type: ignore[method-assign]
# The response doesn't have the proper userGroup or department.
cas_response = CasResponse("test_user", {})
request = _mock_request()
self.get_success(
self.handler._handle_cas_response(request, cas_response, "redirect_uri", "")
)
auth_handler.complete_sso_login.assert_not_called()
# The response doesn't have any department.
cas_response = CasResponse("test_user", {"userGroup": ["staff"]})
request.reset_mock()
self.get_success(
self.handler._handle_cas_response(request, cas_response, "redirect_uri", "")
)
auth_handler.complete_sso_login.assert_not_called()
# Add the proper attributes and it should succeed.
cas_response = CasResponse(
"test_user", {"userGroup": ["staff", "admin"], "department": ["sales"]}
)
request.reset_mock()
self.get_success(
self.handler._handle_cas_response(request, cas_response, "redirect_uri", "")
)
# check that the auth handler got called as expected
auth_handler.complete_sso_login.assert_called_once_with(
"@test_user:test",
"cas",
request,
"redirect_uri",
None,
new_user=True,
auth_provider_session_id=None,
)
@override_config({"cas_config": {"enable_registration": False}})
def test_map_cas_user_does_not_register_new_user(self) -> None:
"""Ensures new users are not registered if the enabled registration flag is disabled."""
# stub out the auth handler
auth_handler = self.hs.get_auth_handler()
auth_handler.complete_sso_login = AsyncMock() # type: ignore[method-assign]
cas_response = CasResponse("test_user", {})
request = _mock_request()
self.get_success(
self.handler._handle_cas_response(request, cas_response, "redirect_uri", "")
)
# check that the auth handler was not called as expected
auth_handler.complete_sso_login.assert_not_called()
def _mock_request() -> Mock:
"""Returns a mock which will stand in as a SynapseRequest"""
mock = Mock(
spec=[
"finish",
"getClientAddress",
"getHeader",
"setHeader",
"setResponseCode",
"write",
]
)
# `_disconnected` musn't be another `Mock`, otherwise it will be truthy.
mock._disconnected = False
return mock
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