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During the migration the automated script to update the copyright headers accidentally got rid of some of the existing copyright lines. Reinstate them.
381 lines
13 KiB
Python
381 lines
13 KiB
Python
#
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# This file is licensed under the Affero General Public License (AGPL) version 3.
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#
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# Copyright 2020 The Matrix.org Foundation C.I.C.
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# Copyright (C) 2023 New Vector, Ltd
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Affero General Public License as
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# published by the Free Software Foundation, either version 3 of the
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# License, or (at your option) any later version.
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#
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# See the GNU Affero General Public License for more details:
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# <https://www.gnu.org/licenses/agpl-3.0.html>.
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#
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# Originally licensed under the Apache License, Version 2.0:
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# <http://www.apache.org/licenses/LICENSE-2.0>.
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#
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# [This file includes modifications made by New Vector Limited]
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#
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#
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from typing import Any, Dict, Optional, Set, Tuple
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from unittest.mock import AsyncMock, Mock
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import attr
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from twisted.test.proto_helpers import MemoryReactor
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from synapse.api.errors import RedirectException
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from synapse.module_api import ModuleApi
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from synapse.server import HomeServer
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from synapse.types import JsonDict
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from synapse.util import Clock
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from tests.unittest import HomeserverTestCase, override_config
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# Check if we have the dependencies to run the tests.
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try:
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import saml2.config
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import saml2.response
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from saml2.sigver import SigverError
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has_saml2 = True
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# pysaml2 can be installed and imported, but might not be able to find xmlsec1.
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config = saml2.config.SPConfig()
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try:
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config.load({"metadata": {}})
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has_xmlsec1 = True
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except SigverError:
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has_xmlsec1 = False
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except ImportError:
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has_saml2 = False
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has_xmlsec1 = False
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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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@attr.s
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class FakeAuthnResponse:
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ava = attr.ib(type=dict)
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assertions = attr.ib(type=list, factory=list)
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in_response_to = attr.ib(type=Optional[str], default=None)
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class TestMappingProvider:
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def __init__(self, config: None, module: ModuleApi):
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pass
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@staticmethod
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def parse_config(config: JsonDict) -> None:
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return None
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@staticmethod
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def get_saml_attributes(config: None) -> Tuple[Set[str], Set[str]]:
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return {"uid"}, {"displayName"}
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def get_remote_user_id(
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self, saml_response: "saml2.response.AuthnResponse", client_redirect_url: str
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) -> str:
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return saml_response.ava["uid"]
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def saml_response_to_user_attributes(
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self,
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saml_response: "saml2.response.AuthnResponse",
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failures: int,
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client_redirect_url: str,
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) -> dict:
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localpart = saml_response.ava["username"] + (str(failures) if failures else "")
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return {"mxid_localpart": localpart, "displayname": None}
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class TestRedirectMappingProvider(TestMappingProvider):
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def saml_response_to_user_attributes(
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self,
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saml_response: "saml2.response.AuthnResponse",
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failures: int,
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client_redirect_url: str,
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) -> dict:
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raise RedirectException(b"https://custom-saml-redirect/")
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class SamlHandlerTestCase(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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saml_config: Dict[str, Any] = {
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"sp_config": {"metadata": {}},
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# Disable grandfathering.
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"grandfathered_mxid_source_attribute": None,
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"user_mapping_provider": {"module": __name__ + ".TestMappingProvider"},
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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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saml_config.update(config.get("saml2_config", {}))
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config["saml2_config"] = saml_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_saml_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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if not has_saml2:
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skip = "Requires pysaml2"
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elif not has_xmlsec1:
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skip = "Requires xmlsec1"
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def test_map_saml_response_to_user(self) -> None:
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"""Ensure that mapping the SAML response 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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# send a mocked-up SAML response to the callback
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saml_response = FakeAuthnResponse({"uid": "test_user", "username": "test_user"})
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request = _mock_request()
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self.get_success(
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self.handler._handle_authn_response(request, saml_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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"saml",
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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({"saml2_config": {"grandfathered_mxid_source_attribute": "mxid"}})
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def test_map_saml_response_to_existing_user(self) -> None:
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"""Existing users can log in with SAML 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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saml_response = FakeAuthnResponse(
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{"uid": "tester", "mxid": ["test_user"], "username": "test_user"}
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)
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request = _mock_request()
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self.get_success(
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self.handler._handle_authn_response(request, saml_response, "")
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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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"saml",
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request,
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"",
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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_authn_response(request, saml_response, "")
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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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"saml",
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request,
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"",
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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_saml_response_to_invalid_localpart(self) -> None:
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"""If the mapping provider generates an invalid localpart it should be rejected."""
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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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# mock out the error renderer too
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sso_handler = self.hs.get_sso_handler()
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sso_handler.render_error = Mock(return_value=None) # type: ignore[method-assign]
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saml_response = FakeAuthnResponse({"uid": "test", "username": "föö"})
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request = _mock_request()
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self.get_success(
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self.handler._handle_authn_response(request, saml_response, ""),
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)
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sso_handler.render_error.assert_called_once_with(
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request, "mapping_error", "localpart is invalid: föö"
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)
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auth_handler.complete_sso_login.assert_not_called()
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def test_map_saml_response_to_user_retries(self) -> None:
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"""The mapping provider can retry generating an MXID if the MXID is already in use."""
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# stub out the auth handler and error renderer
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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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sso_handler = self.hs.get_sso_handler()
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sso_handler.render_error = Mock(return_value=None) # type: ignore[method-assign]
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# register a user to occupy the first-choice MXID
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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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# send the fake SAML response
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saml_response = FakeAuthnResponse({"uid": "test", "username": "test_user"})
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request = _mock_request()
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self.get_success(
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self.handler._handle_authn_response(request, saml_response, ""),
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)
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# test_user is already taken, so test_user1 gets registered instead.
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auth_handler.complete_sso_login.assert_called_once_with(
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"@test_user1:test",
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"saml",
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request,
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"",
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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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auth_handler.complete_sso_login.reset_mock()
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# Register all of the potential mxids for a particular SAML username.
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self.get_success(
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store.register_user(user_id="@tester:test", password_hash=None)
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)
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for i in range(1, 3):
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self.get_success(
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store.register_user(user_id="@tester%d:test" % i, password_hash=None)
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)
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# Now attempt to map to a username, this will fail since all potential usernames are taken.
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saml_response = FakeAuthnResponse({"uid": "tester", "username": "tester"})
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self.get_success(
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self.handler._handle_authn_response(request, saml_response, ""),
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)
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sso_handler.render_error.assert_called_once_with(
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request,
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"mapping_error",
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"Unable to generate a Matrix ID from the SSO response",
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)
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auth_handler.complete_sso_login.assert_not_called()
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@override_config(
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{
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"saml2_config": {
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"user_mapping_provider": {
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"module": __name__ + ".TestRedirectMappingProvider"
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},
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}
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}
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)
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def test_map_saml_response_redirect(self) -> None:
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"""Test a mapping provider that raises a RedirectException"""
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saml_response = FakeAuthnResponse({"uid": "test", "username": "test_user"})
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request = _mock_request()
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e = self.get_failure(
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self.handler._handle_authn_response(request, saml_response, ""),
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RedirectException,
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)
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self.assertEqual(e.value.location, b"https://custom-saml-redirect/")
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@override_config(
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{
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"saml2_config": {
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"attribute_requirements": [
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{"attribute": "userGroup", "value": "staff"},
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{"attribute": "department", "value": "sales"},
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],
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},
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}
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)
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def test_attribute_requirements(self) -> None:
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"""The required attributes must be met from the SAML 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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saml_response = FakeAuthnResponse({"uid": "test_user", "username": "test_user"})
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request = _mock_request()
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self.get_success(
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self.handler._handle_authn_response(request, saml_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 the proper department.
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saml_response = FakeAuthnResponse(
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{"uid": "test_user", "username": "test_user", "userGroup": ["staff"]}
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)
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request = _mock_request()
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self.get_success(
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self.handler._handle_authn_response(request, saml_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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saml_response = FakeAuthnResponse(
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{
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"uid": "test_user",
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"username": "test_user",
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"userGroup": ["staff", "admin"],
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"department": ["sales"],
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}
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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_authn_response(request, saml_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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"saml",
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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 _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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