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Diffstat (limited to 'tests/handlers/test_saml.py')
| -rw-r--r-- | tests/handlers/test_saml.py | 196 |
1 files changed, 196 insertions, 0 deletions
diff --git a/tests/handlers/test_saml.py b/tests/handlers/test_saml.py new file mode 100644 index 0000000000..45dc17aba5 --- /dev/null +++ b/tests/handlers/test_saml.py @@ -0,0 +1,196 @@ +# Copyright 2020 The Matrix.org Foundation C.I.C. +# +# Licensed under the Apache License, Version 2.0 (the "License"); +# you may not use this file except in compliance with the License. +# You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. + +import attr + +from synapse.api.errors import RedirectException +from synapse.handlers.sso import MappingException + +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/" + + +@attr.s +class FakeAuthnResponse: + ava = attr.ib(type=dict) + + +class TestMappingProvider: + def __init__(self, config, module): + pass + + @staticmethod + def parse_config(config): + return + + @staticmethod + def get_saml_attributes(config): + return {"uid"}, {"displayName"} + + def get_remote_user_id(self, saml_response, client_redirect_url): + return saml_response.ava["uid"] + + def saml_response_to_user_attributes( + self, saml_response, failures, client_redirect_url + ): + localpart = saml_response.ava["username"] + (str(failures) if failures else "") + return {"mxid_localpart": localpart, "displayname": None} + + +class TestRedirectMappingProvider(TestMappingProvider): + def saml_response_to_user_attributes( + self, saml_response, failures, client_redirect_url + ): + raise RedirectException(b"https://custom-saml-redirect/") + + +class SamlHandlerTestCase(HomeserverTestCase): + def default_config(self): + config = super().default_config() + config["public_baseurl"] = BASE_URL + saml_config = { + "sp_config": {"metadata": {}}, + # Disable grandfathering. + "grandfathered_mxid_source_attribute": None, + "user_mapping_provider": {"module": __name__ + ".TestMappingProvider"}, + } + + # Update this config with what's in the default config so that + # override_config works as expected. + saml_config.update(config.get("saml2_config", {})) + config["saml2_config"] = saml_config + + return config + + def make_homeserver(self, reactor, clock): + hs = self.setup_test_homeserver() + + self.handler = hs.get_saml_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_saml_response_to_user(self): + """Ensure that mapping the SAML response returned from a provider to an MXID works properly.""" + saml_response = FakeAuthnResponse({"uid": "test_user", "username": "test_user"}) + # The redirect_url doesn't matter with the default user mapping provider. + redirect_url = "" + mxid = self.get_success( + self.handler._map_saml_response_to_user( + saml_response, redirect_url, "user-agent", "10.10.10.10" + ) + ) + self.assertEqual(mxid, "@test_user:test") + + @override_config({"saml2_config": {"grandfathered_mxid_source_attribute": "mxid"}}) + def test_map_saml_response_to_existing_user(self): + """Existing users can log in with SAML account.""" + store = self.hs.get_datastore() + self.get_success( + store.register_user(user_id="@test_user:test", password_hash=None) + ) + + # Map a user via SSO. + saml_response = FakeAuthnResponse( + {"uid": "tester", "mxid": ["test_user"], "username": "test_user"} + ) + redirect_url = "" + mxid = self.get_success( + self.handler._map_saml_response_to_user( + saml_response, redirect_url, "user-agent", "10.10.10.10" + ) + ) + self.assertEqual(mxid, "@test_user:test") + + # Subsequent calls should map to the same mxid. + mxid = self.get_success( + self.handler._map_saml_response_to_user( + saml_response, redirect_url, "user-agent", "10.10.10.10" + ) + ) + self.assertEqual(mxid, "@test_user:test") + + def test_map_saml_response_to_invalid_localpart(self): + """If the mapping provider generates an invalid localpart it should be rejected.""" + saml_response = FakeAuthnResponse({"uid": "test", "username": "föö"}) + redirect_url = "" + e = self.get_failure( + self.handler._map_saml_response_to_user( + saml_response, redirect_url, "user-agent", "10.10.10.10" + ), + MappingException, + ) + self.assertEqual(str(e.value), "localpart is invalid: föö") + + def test_map_saml_response_to_user_retries(self): + """The mapping provider can retry generating an MXID if the MXID is already in use.""" + store = self.hs.get_datastore() + self.get_success( + store.register_user(user_id="@test_user:test", password_hash=None) + ) + saml_response = FakeAuthnResponse({"uid": "test", "username": "test_user"}) + redirect_url = "" + mxid = self.get_success( + self.handler._map_saml_response_to_user( + saml_response, redirect_url, "user-agent", "10.10.10.10" + ) + ) + # test_user is already taken, so test_user1 gets registered instead. + self.assertEqual(mxid, "@test_user1:test") + + # Register all of the potential mxids for a particular SAML username. + self.get_success( + store.register_user(user_id="@tester:test", password_hash=None) + ) + for i in range(1, 3): + self.get_success( + store.register_user(user_id="@tester%d:test" % i, password_hash=None) + ) + + # Now attempt to map to a username, this will fail since all potential usernames are taken. + saml_response = FakeAuthnResponse({"uid": "tester", "username": "tester"}) + e = self.get_failure( + self.handler._map_saml_response_to_user( + saml_response, redirect_url, "user-agent", "10.10.10.10" + ), + MappingException, + ) + self.assertEqual( + str(e.value), "Unable to generate a Matrix ID from the SSO response" + ) + + @override_config( + { + "saml2_config": { + "user_mapping_provider": { + "module": __name__ + ".TestRedirectMappingProvider" + }, + } + } + ) + def test_map_saml_response_redirect(self): + saml_response = FakeAuthnResponse({"uid": "test", "username": "test_user"}) + redirect_url = "" + e = self.get_failure( + self.handler._map_saml_response_to_user( + saml_response, redirect_url, "user-agent", "10.10.10.10" + ), + RedirectException, + ) + self.assertEqual(e.value.location, b"https://custom-saml-redirect/") |