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https://github.com/element-hq/synapse.git
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fe69e7f617
Similar to OIDC, CAS providers can now disable registration such that only existing users are able to login via SSO.
232 lines
8 KiB
Python
232 lines
8 KiB
Python
# Copyright 2020 The Matrix.org Foundation C.I.C.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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from typing import Any, Dict
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from unittest.mock import AsyncMock, Mock
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from twisted.test.proto_helpers import MemoryReactor
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from synapse.handlers.cas import CasResponse
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from synapse.server import HomeServer
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from synapse.util import Clock
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from tests.unittest import HomeserverTestCase, override_config
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# These are a few constants that are used as config parameters in the tests.
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BASE_URL = "https://synapse/"
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SERVER_URL = "https://issuer/"
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class CasHandlerTestCase(HomeserverTestCase):
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def default_config(self) -> Dict[str, Any]:
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config = super().default_config()
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config["public_baseurl"] = BASE_URL
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cas_config = {
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"enabled": True,
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"server_url": SERVER_URL,
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"service_url": BASE_URL,
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}
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# Update this config with what's in the default config so that
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# override_config works as expected.
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cas_config.update(config.get("cas_config", {}))
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config["cas_config"] = cas_config
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return config
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def make_homeserver(self, reactor: MemoryReactor, clock: Clock) -> HomeServer:
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hs = self.setup_test_homeserver()
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self.handler = hs.get_cas_handler()
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# Reduce the number of attempts when generating MXIDs.
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sso_handler = hs.get_sso_handler()
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sso_handler._MAP_USERNAME_RETRIES = 3
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return hs
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def test_map_cas_user_to_user(self) -> None:
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"""Ensure that mapping the CAS user returned from a provider to an MXID works properly."""
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# stub out the auth handler
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auth_handler = self.hs.get_auth_handler()
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auth_handler.complete_sso_login = AsyncMock() # type: ignore[method-assign]
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cas_response = CasResponse("test_user", {})
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request = _mock_request()
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self.get_success(
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self.handler._handle_cas_response(request, cas_response, "redirect_uri", "")
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)
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# check that the auth handler got called as expected
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auth_handler.complete_sso_login.assert_called_once_with(
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"@test_user:test",
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"cas",
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request,
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"redirect_uri",
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None,
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new_user=True,
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auth_provider_session_id=None,
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)
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def test_map_cas_user_to_existing_user(self) -> None:
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"""Existing users can log in with CAS account."""
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store = self.hs.get_datastores().main
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self.get_success(
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store.register_user(user_id="@test_user:test", password_hash=None)
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)
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# stub out the auth handler
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auth_handler = self.hs.get_auth_handler()
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auth_handler.complete_sso_login = AsyncMock() # type: ignore[method-assign]
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# Map a user via SSO.
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cas_response = CasResponse("test_user", {})
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request = _mock_request()
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self.get_success(
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self.handler._handle_cas_response(request, cas_response, "redirect_uri", "")
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)
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# check that the auth handler got called as expected
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auth_handler.complete_sso_login.assert_called_once_with(
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"@test_user:test",
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"cas",
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request,
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"redirect_uri",
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None,
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new_user=False,
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auth_provider_session_id=None,
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)
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# Subsequent calls should map to the same mxid.
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auth_handler.complete_sso_login.reset_mock()
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self.get_success(
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self.handler._handle_cas_response(request, cas_response, "redirect_uri", "")
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)
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auth_handler.complete_sso_login.assert_called_once_with(
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"@test_user:test",
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"cas",
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request,
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"redirect_uri",
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None,
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new_user=False,
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auth_provider_session_id=None,
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)
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def test_map_cas_user_to_invalid_localpart(self) -> None:
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"""CAS automaps invalid characters to base-64 encoding."""
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# stub out the auth handler
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auth_handler = self.hs.get_auth_handler()
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auth_handler.complete_sso_login = AsyncMock() # type: ignore[method-assign]
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cas_response = CasResponse("föö", {})
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request = _mock_request()
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self.get_success(
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self.handler._handle_cas_response(request, cas_response, "redirect_uri", "")
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)
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# check that the auth handler got called as expected
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auth_handler.complete_sso_login.assert_called_once_with(
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"@f=c3=b6=c3=b6:test",
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"cas",
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request,
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"redirect_uri",
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None,
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new_user=True,
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auth_provider_session_id=None,
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)
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@override_config(
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{
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"cas_config": {
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"required_attributes": {"userGroup": "staff", "department": None}
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}
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}
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)
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def test_required_attributes(self) -> None:
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"""The required attributes must be met from the CAS response."""
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# stub out the auth handler
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auth_handler = self.hs.get_auth_handler()
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auth_handler.complete_sso_login = AsyncMock() # type: ignore[method-assign]
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# The response doesn't have the proper userGroup or department.
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cas_response = CasResponse("test_user", {})
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request = _mock_request()
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self.get_success(
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self.handler._handle_cas_response(request, cas_response, "redirect_uri", "")
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)
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auth_handler.complete_sso_login.assert_not_called()
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# The response doesn't have any department.
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cas_response = CasResponse("test_user", {"userGroup": ["staff"]})
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request.reset_mock()
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self.get_success(
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self.handler._handle_cas_response(request, cas_response, "redirect_uri", "")
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)
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auth_handler.complete_sso_login.assert_not_called()
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# Add the proper attributes and it should succeed.
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cas_response = CasResponse(
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"test_user", {"userGroup": ["staff", "admin"], "department": ["sales"]}
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)
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request.reset_mock()
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self.get_success(
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self.handler._handle_cas_response(request, cas_response, "redirect_uri", "")
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)
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# check that the auth handler got called as expected
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auth_handler.complete_sso_login.assert_called_once_with(
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"@test_user:test",
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"cas",
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request,
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"redirect_uri",
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None,
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new_user=True,
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auth_provider_session_id=None,
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)
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@override_config({"cas_config": {"enable_registration": False}})
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def test_map_cas_user_does_not_register_new_user(self) -> None:
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"""Ensures new users are not registered if the enabled registration flag is disabled."""
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# stub out the auth handler
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auth_handler = self.hs.get_auth_handler()
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auth_handler.complete_sso_login = AsyncMock() # type: ignore[method-assign]
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cas_response = CasResponse("test_user", {})
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request = _mock_request()
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self.get_success(
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self.handler._handle_cas_response(request, cas_response, "redirect_uri", "")
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)
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# check that the auth handler was not called as expected
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auth_handler.complete_sso_login.assert_not_called()
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def _mock_request() -> Mock:
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"""Returns a mock which will stand in as a SynapseRequest"""
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mock = Mock(
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spec=[
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"finish",
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"getClientAddress",
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"getHeader",
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"setHeader",
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"setResponseCode",
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"write",
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]
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)
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# `_disconnected` musn't be another `Mock`, otherwise it will be truthy.
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mock._disconnected = False
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return mock
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