diff --git a/changelog.d/7240.bugfix b/changelog.d/7240.bugfix new file mode 100644 index 0000000000..83b18d3e11 --- /dev/null +++ b/changelog.d/7240.bugfix @@ -0,0 +1 @@ +Do not allow a deactivated user to login via SSO. diff --git a/synapse/config/sso.py b/synapse/config/sso.py index ec3dca9efc..686678a3b7 100644 --- a/synapse/config/sso.py +++ b/synapse/config/sso.py @@ -12,6 +12,7 @@ # 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 os from typing import Any, Dict import pkg_resources @@ -36,6 +37,12 @@ class SSOConfig(Config): template_dir = pkg_resources.resource_filename("synapse", "res/templates",) self.sso_redirect_confirm_template_dir = template_dir + self.sso_account_deactivated_template = self.read_file( + os.path.join( + self.sso_redirect_confirm_template_dir, "sso_account_deactivated.html" + ), + "sso_account_deactivated_template", + ) self.sso_client_whitelist = sso_config.get("client_whitelist") or [] diff --git a/synapse/handlers/auth.py b/synapse/handlers/auth.py index 892adb00b9..fbfbd44a2e 100644 --- a/synapse/handlers/auth.py +++ b/synapse/handlers/auth.py @@ -161,6 +161,9 @@ class AuthHandler(BaseHandler): self._sso_auth_confirm_template = load_jinja2_templates( hs.config.sso_redirect_confirm_template_dir, ["sso_auth_confirm.html"], )[0] + self._sso_account_deactivated_template = ( + hs.config.sso_account_deactivated_template + ) self._server_name = hs.config.server_name @@ -644,9 +647,6 @@ class AuthHandler(BaseHandler): Returns: defer.Deferred: (unicode) canonical_user_id, or None if zero or multiple matches - - Raises: - UserDeactivatedError if a user is found but is deactivated. """ res = yield self._find_user_id_and_pwd_hash(user_id) if res is not None: @@ -1099,7 +1099,7 @@ class AuthHandler(BaseHandler): request.write(html_bytes) finish_request(request) - def complete_sso_login( + async def complete_sso_login( self, registered_user_id: str, request: SynapseRequest, @@ -1113,6 +1113,32 @@ class AuthHandler(BaseHandler): client_redirect_url: The URL to which to redirect the user at the end of the process. """ + # If the account has been deactivated, do not proceed with the login + # flow. + deactivated = await self.store.get_user_deactivated_status(registered_user_id) + if deactivated: + html = self._sso_account_deactivated_template.encode("utf-8") + + request.setResponseCode(403) + request.setHeader(b"Content-Type", b"text/html; charset=utf-8") + request.setHeader(b"Content-Length", b"%d" % (len(html),)) + request.write(html) + finish_request(request) + return + + self._complete_sso_login(registered_user_id, request, client_redirect_url) + + def _complete_sso_login( + self, + registered_user_id: str, + request: SynapseRequest, + client_redirect_url: str, + ): + """ + The synchronous portion of complete_sso_login. + + This exists purely for backwards compatibility of synapse.module_api.ModuleApi. + """ # Create a login token login_token = self.macaroon_gen.generate_short_term_login_token( registered_user_id diff --git a/synapse/handlers/cas_handler.py b/synapse/handlers/cas_handler.py index d977badf35..5cb3f9d133 100644 --- a/synapse/handlers/cas_handler.py +++ b/synapse/handlers/cas_handler.py @@ -216,6 +216,6 @@ class CasHandler: localpart=localpart, default_display_name=user_display_name ) - self._auth_handler.complete_sso_login( + await self._auth_handler.complete_sso_login( registered_user_id, request, client_redirect_url ) diff --git a/synapse/handlers/saml_handler.py b/synapse/handlers/saml_handler.py index 4741c82f61..7c9454b504 100644 --- a/synapse/handlers/saml_handler.py +++ b/synapse/handlers/saml_handler.py @@ -154,7 +154,7 @@ class SamlHandler: ) else: - self._auth_handler.complete_sso_login(user_id, request, relay_state) + await self._auth_handler.complete_sso_login(user_id, request, relay_state) async def _map_saml_response_to_user( self, resp_bytes: str, client_redirect_url: str diff --git a/synapse/module_api/__init__.py b/synapse/module_api/__init__.py index c7fffd72f2..afc3598e11 100644 --- a/synapse/module_api/__init__.py +++ b/synapse/module_api/__init__.py @@ -220,6 +220,8 @@ class ModuleApi(object): want their access token sent to `client_redirect_url`, or redirect them to that URL with a token directly if the URL matches with one of the whitelisted clients. + This is deprecated in favor of complete_sso_login_async. + Args: registered_user_id: The MXID that has been registered as a previous step of of this SSO login. @@ -227,6 +229,24 @@ class ModuleApi(object): client_redirect_url: The URL to which to offer to redirect the user (or to redirect them directly if whitelisted). """ - self._auth_handler.complete_sso_login( + self._auth_handler._complete_sso_login( + registered_user_id, request, client_redirect_url, + ) + + async def complete_sso_login_async( + self, registered_user_id: str, request: SynapseRequest, client_redirect_url: str + ): + """Complete a SSO login by redirecting the user to a page to confirm whether they + want their access token sent to `client_redirect_url`, or redirect them to that + URL with a token directly if the URL matches with one of the whitelisted clients. + + Args: + registered_user_id: The MXID that has been registered as a previous step of + of this SSO login. + request: The request to respond to. + client_redirect_url: The URL to which to offer to redirect the user (or to + redirect them directly if whitelisted). + """ + await self._auth_handler.complete_sso_login( registered_user_id, request, client_redirect_url, ) diff --git a/synapse/res/templates/sso_account_deactivated.html b/synapse/res/templates/sso_account_deactivated.html new file mode 100644 index 0000000000..4eb8db9fb4 --- /dev/null +++ b/synapse/res/templates/sso_account_deactivated.html @@ -0,0 +1,10 @@ + + + + + SSO account deactivated + + +

This account has been deactivated.

+ + diff --git a/tests/rest/client/v1/test_login.py b/tests/rest/client/v1/test_login.py index aed8853d6e..1856c7ffd5 100644 --- a/tests/rest/client/v1/test_login.py +++ b/tests/rest/client/v1/test_login.py @@ -257,7 +257,7 @@ class LoginRestServletTestCase(unittest.HomeserverTestCase): self.assertEquals(channel.code, 200, channel.result) -class CASRedirectConfirmTestCase(unittest.HomeserverTestCase): +class CASTestCase(unittest.HomeserverTestCase): servlets = [ login.register_servlets, @@ -274,6 +274,9 @@ class CASRedirectConfirmTestCase(unittest.HomeserverTestCase): "service_url": "https://matrix.goodserver.com:8448", } + cas_user_id = "username" + self.user_id = "@%s:test" % cas_user_id + async def get_raw(uri, args): """Return an example response payload from a call to the `/proxyValidate` endpoint of a CAS server, copied from @@ -282,10 +285,11 @@ class CASRedirectConfirmTestCase(unittest.HomeserverTestCase): This needs to be returned by an async function (as opposed to set as the mock's return value) because the corresponding Synapse code awaits on it. """ - return """ + return ( + """ - username + %s PGTIOU-84678-8a9d... https://proxy2/pgtUrl @@ -294,6 +298,8 @@ class CASRedirectConfirmTestCase(unittest.HomeserverTestCase): """ + % cas_user_id + ) mocked_http_client = Mock(spec=["get_raw"]) mocked_http_client.get_raw.side_effect = get_raw @@ -304,6 +310,9 @@ class CASRedirectConfirmTestCase(unittest.HomeserverTestCase): return self.hs + def prepare(self, reactor, clock, hs): + self.deactivate_account_handler = hs.get_deactivate_account_handler() + def test_cas_redirect_confirm(self): """Tests that the SSO login flow serves a confirmation page before redirecting a user to the redirect URL. @@ -370,3 +379,30 @@ class CASRedirectConfirmTestCase(unittest.HomeserverTestCase): self.assertEqual(channel.code, 302) location_headers = channel.headers.getRawHeaders("Location") self.assertEqual(location_headers[0][: len(redirect_url)], redirect_url) + + @override_config({"sso": {"client_whitelist": ["https://legit-site.com/"]}}) + def test_deactivated_user(self): + """Logging in as a deactivated account should error.""" + redirect_url = "https://legit-site.com/" + + # First login (to create the user). + self._test_redirect(redirect_url) + + # Deactivate the account. + self.get_success( + self.deactivate_account_handler.deactivate_account(self.user_id, False) + ) + + # Request the CAS ticket. + cas_ticket_url = ( + "/_matrix/client/r0/login/cas/ticket?redirectUrl=%s&ticket=ticket" + % (urllib.parse.quote(redirect_url)) + ) + + # Get Synapse to call the fake CAS and serve the template. + request, channel = self.make_request("GET", cas_ticket_url) + self.render(request) + + # Because the user is deactivated they are served an error template. + self.assertEqual(channel.code, 403) + self.assertIn(b"SSO account deactivated", channel.result["body"])