From 9192d74b0bf2f87b00d3e106a18baa9ce27acda1 Mon Sep 17 00:00:00 2001 From: Quentin Gliech Date: Tue, 25 Oct 2022 16:25:02 +0200 Subject: Refactor OIDC tests to better mimic an actual OIDC provider. (#13910) This implements a fake OIDC server, which intercepts calls to the HTTP client. Improves accuracy of tests by covering more internal methods. One particular example was the ID token validation, which previously mocked. This uncovered an incorrect dependency: Synapse actually requires at least authlib 0.15.1, not 0.14.0. --- tests/rest/client/utils.py | 136 +++++++++++++++++++++++---------------------- 1 file changed, 71 insertions(+), 65 deletions(-) (limited to 'tests/rest/client/utils.py') diff --git a/tests/rest/client/utils.py b/tests/rest/client/utils.py index c249a42bb6..967d229223 100644 --- a/tests/rest/client/utils.py +++ b/tests/rest/client/utils.py @@ -31,7 +31,6 @@ from typing import ( Tuple, overload, ) -from unittest.mock import patch from urllib.parse import urlencode import attr @@ -46,8 +45,19 @@ from synapse.server import HomeServer from synapse.types import JsonDict from tests.server import FakeChannel, FakeSite, make_request -from tests.test_utils import FakeResponse from tests.test_utils.html_parsers import TestHtmlParser +from tests.test_utils.oidc import FakeAuthorizationGrant, FakeOidcServer + +# an 'oidc_config' suitable for login_via_oidc. +TEST_OIDC_ISSUER = "https://issuer.test/" +TEST_OIDC_CONFIG = { + "enabled": True, + "issuer": TEST_OIDC_ISSUER, + "client_id": "test-client-id", + "client_secret": "test-client-secret", + "scopes": ["openid"], + "user_mapping_provider": {"config": {"localpart_template": "{{ user.sub }}"}}, +} @attr.s(auto_attribs=True) @@ -543,12 +553,28 @@ class RestHelper: return channel.json_body + def fake_oidc_server(self, issuer: str = TEST_OIDC_ISSUER) -> FakeOidcServer: + """Create a ``FakeOidcServer``. + + This can be used in conjuction with ``login_via_oidc``:: + + fake_oidc_server = self.helper.fake_oidc_server() + login_data, _ = self.helper.login_via_oidc(fake_oidc_server, "user") + """ + + return FakeOidcServer( + clock=self.hs.get_clock(), + issuer=issuer, + ) + def login_via_oidc( self, + fake_server: FakeOidcServer, remote_user_id: str, + with_sid: bool = False, expected_status: int = 200, - ) -> JsonDict: - """Log in via OIDC + ) -> Tuple[JsonDict, FakeAuthorizationGrant]: + """Log in (as a new user) via OIDC Returns the result of the final token login. @@ -560,7 +586,10 @@ class RestHelper: the normal places. """ client_redirect_url = "https://x" - channel = self.auth_via_oidc({"sub": remote_user_id}, client_redirect_url) + userinfo = {"sub": remote_user_id} + channel, grant = self.auth_via_oidc( + fake_server, userinfo, client_redirect_url, with_sid=with_sid + ) # expect a confirmation page assert channel.code == HTTPStatus.OK, channel.result @@ -585,14 +614,16 @@ class RestHelper: assert ( channel.code == expected_status ), f"unexpected status in response: {channel.code}" - return channel.json_body + return channel.json_body, grant def auth_via_oidc( self, + fake_server: FakeOidcServer, user_info_dict: JsonDict, client_redirect_url: Optional[str] = None, ui_auth_session_id: Optional[str] = None, - ) -> FakeChannel: + with_sid: bool = False, + ) -> Tuple[FakeChannel, FakeAuthorizationGrant]: """Perform an OIDC authentication flow via a mock OIDC provider. This can be used for either login or user-interactive auth. @@ -616,6 +647,7 @@ class RestHelper: the login redirect endpoint ui_auth_session_id: if set, we will perform a UI Auth flow. The session id of the UI auth. + with_sid: if True, generates a random `sid` (OIDC session ID) Returns: A FakeChannel containing the result of calling the OIDC callback endpoint. @@ -625,14 +657,15 @@ class RestHelper: cookies: Dict[str, str] = {} - # if we're doing a ui auth, hit the ui auth redirect endpoint - if ui_auth_session_id: - # can't set the client redirect url for UI Auth - assert client_redirect_url is None - oauth_uri = self.initiate_sso_ui_auth(ui_auth_session_id, cookies) - else: - # otherwise, hit the login redirect endpoint - oauth_uri = self.initiate_sso_login(client_redirect_url, cookies) + with fake_server.patch_homeserver(hs=self.hs): + # if we're doing a ui auth, hit the ui auth redirect endpoint + if ui_auth_session_id: + # can't set the client redirect url for UI Auth + assert client_redirect_url is None + oauth_uri = self.initiate_sso_ui_auth(ui_auth_session_id, cookies) + else: + # otherwise, hit the login redirect endpoint + oauth_uri = self.initiate_sso_login(client_redirect_url, cookies) # we now have a URI for the OIDC IdP, but we skip that and go straight # back to synapse's OIDC callback resource. However, we do need the "state" @@ -640,17 +673,21 @@ class RestHelper: # that synapse passes to the client. oauth_uri_path, _ = oauth_uri.split("?", 1) - assert oauth_uri_path == TEST_OIDC_AUTH_ENDPOINT, ( + assert oauth_uri_path == fake_server.authorization_endpoint, ( "unexpected SSO URI " + oauth_uri_path ) - return self.complete_oidc_auth(oauth_uri, cookies, user_info_dict) + return self.complete_oidc_auth( + fake_server, oauth_uri, cookies, user_info_dict, with_sid=with_sid + ) def complete_oidc_auth( self, + fake_serer: FakeOidcServer, oauth_uri: str, cookies: Mapping[str, str], user_info_dict: JsonDict, - ) -> FakeChannel: + with_sid: bool = False, + ) -> Tuple[FakeChannel, FakeAuthorizationGrant]: """Mock out an OIDC authentication flow Assumes that an OIDC auth has been initiated by one of initiate_sso_login or @@ -661,50 +698,37 @@ class RestHelper: Requires the OIDC callback resource to be mounted at the normal place. Args: + fake_server: the fake OIDC server with which the auth should be done oauth_uri: the OIDC URI returned by synapse's redirect endpoint (ie, from initiate_sso_login or initiate_sso_ui_auth). cookies: the cookies set by synapse's redirect endpoint, which will be sent back to the callback endpoint. user_info_dict: the remote userinfo that the OIDC provider should present. Typically this should be '{"sub": ""}'. + with_sid: if True, generates a random `sid` (OIDC session ID) Returns: A FakeChannel containing the result of calling the OIDC callback endpoint. """ _, oauth_uri_qs = oauth_uri.split("?", 1) params = urllib.parse.parse_qs(oauth_uri_qs) + + code, grant = fake_serer.start_authorization( + scope=params["scope"][0], + userinfo=user_info_dict, + client_id=params["client_id"][0], + redirect_uri=params["redirect_uri"][0], + nonce=params["nonce"][0], + with_sid=with_sid, + ) + state = params["state"][0] + callback_uri = "%s?%s" % ( urllib.parse.urlparse(params["redirect_uri"][0]).path, - urllib.parse.urlencode({"state": params["state"][0], "code": "TEST_CODE"}), + urllib.parse.urlencode({"state": state, "code": code}), ) - # before we hit the callback uri, stub out some methods in the http client so - # that we don't have to handle full HTTPS requests. - # (expected url, json response) pairs, in the order we expect them. - expected_requests = [ - # first we get a hit to the token endpoint, which we tell to return - # a dummy OIDC access token - (TEST_OIDC_TOKEN_ENDPOINT, {"access_token": "TEST"}), - # and then one to the user_info endpoint, which returns our remote user id. - (TEST_OIDC_USERINFO_ENDPOINT, user_info_dict), - ] - - async def mock_req( - method: str, - uri: str, - data: Optional[dict] = None, - headers: Optional[Iterable[Tuple[AnyStr, AnyStr]]] = None, - ): - (expected_uri, resp_obj) = expected_requests.pop(0) - assert uri == expected_uri - resp = FakeResponse( - code=HTTPStatus.OK, - phrase=b"OK", - body=json.dumps(resp_obj).encode("utf-8"), - ) - return resp - - with patch.object(self.hs.get_proxied_http_client(), "request", mock_req): + with fake_serer.patch_homeserver(hs=self.hs): # now hit the callback URI with the right params and a made-up code channel = make_request( self.hs.get_reactor(), @@ -715,7 +739,7 @@ class RestHelper: ("Cookie", "%s=%s" % (k, v)) for (k, v) in cookies.items() ], ) - return channel + return channel, grant def initiate_sso_login( self, client_redirect_url: Optional[str], cookies: MutableMapping[str, str] @@ -806,21 +830,3 @@ class RestHelper: assert len(p.links) == 1, "not exactly one link in confirmation page" oauth_uri = p.links[0] return oauth_uri - - -# an 'oidc_config' suitable for login_via_oidc. -TEST_OIDC_AUTH_ENDPOINT = "https://issuer.test/auth" -TEST_OIDC_TOKEN_ENDPOINT = "https://issuer.test/token" -TEST_OIDC_USERINFO_ENDPOINT = "https://issuer.test/userinfo" -TEST_OIDC_CONFIG = { - "enabled": True, - "discover": False, - "issuer": "https://issuer.test", - "client_id": "test-client-id", - "client_secret": "test-client-secret", - "scopes": ["profile"], - "authorization_endpoint": TEST_OIDC_AUTH_ENDPOINT, - "token_endpoint": TEST_OIDC_TOKEN_ENDPOINT, - "userinfo_endpoint": TEST_OIDC_USERINFO_ENDPOINT, - "user_mapping_provider": {"config": {"localpart_template": "{{ user.sub }}"}}, -} -- cgit 1.5.1 From cc3a52b33df72bb4230367536b924a6d1f510d36 Mon Sep 17 00:00:00 2001 From: Quentin Gliech Date: Mon, 31 Oct 2022 18:07:30 +0100 Subject: Support OIDC backchannel logouts (#11414) If configured an OIDC IdP can log a user's session out of Synapse when they log out of the identity provider. The IdP sends a request directly to Synapse (and must be configured with an endpoint) when a user logs out. --- changelog.d/11414.feature | 1 + docs/openid.md | 14 + docs/usage/configuration/config_documentation.md | 9 + synapse/config/oidc.py | 12 + synapse/handlers/oidc.py | 381 ++++++++++++++++++-- synapse/handlers/sso.py | 71 ++++ synapse/rest/synapse/client/oidc/__init__.py | 4 + .../client/oidc/backchannel_logout_resource.py | 35 ++ synapse/storage/databases/main/registration.py | 21 ++ tests/rest/client/test_auth.py | 390 +++++++++++++++++++-- tests/rest/client/utils.py | 55 ++- tests/server.py | 6 + tests/test_utils/oidc.py | 27 +- 13 files changed, 960 insertions(+), 66 deletions(-) create mode 100644 changelog.d/11414.feature create mode 100644 synapse/rest/synapse/client/oidc/backchannel_logout_resource.py (limited to 'tests/rest/client/utils.py') diff --git a/changelog.d/11414.feature b/changelog.d/11414.feature new file mode 100644 index 0000000000..fc035e50a7 --- /dev/null +++ b/changelog.d/11414.feature @@ -0,0 +1 @@ +Support back-channel logouts from OpenID Connect providers. diff --git a/docs/openid.md b/docs/openid.md index 87ebea4c29..37c5eb244d 100644 --- a/docs/openid.md +++ b/docs/openid.md @@ -49,6 +49,13 @@ setting in your configuration file. See the [configuration manual](usage/configuration/config_documentation.md#oidc_providers) for some sample settings, as well as the text below for example configurations for specific providers. +## OIDC Back-Channel Logout + +Synapse supports receiving [OpenID Connect Back-Channel Logout](https://openid.net/specs/openid-connect-backchannel-1_0.html) notifications. + +This lets the OpenID Connect Provider notify Synapse when a user logs out, so that Synapse can end that user session. +This feature can be enabled by setting the `backchannel_logout_enabled` property to `true` in the provider configuration, and setting the following URL as destination for Back-Channel Logout notifications in your OpenID Connect Provider: `[synapse public baseurl]/_synapse/client/oidc/backchannel_logout` + ## Sample configs Here are a few configs for providers that should work with Synapse. @@ -123,6 +130,9 @@ oidc_providers: [Keycloak][keycloak-idp] is an opensource IdP maintained by Red Hat. +Keycloak supports OIDC Back-Channel Logout, which sends logout notification to Synapse, so that Synapse users get logged out when they log out from Keycloak. +This can be optionally enabled by setting `backchannel_logout_enabled` to `true` in the Synapse configuration, and by setting the "Backchannel Logout URL" in Keycloak. + Follow the [Getting Started Guide](https://www.keycloak.org/getting-started) to install Keycloak and set up a realm. 1. Click `Clients` in the sidebar and click `Create` @@ -144,6 +154,8 @@ Follow the [Getting Started Guide](https://www.keycloak.org/getting-started) to | Client Protocol | `openid-connect` | | Access Type | `confidential` | | Valid Redirect URIs | `[synapse public baseurl]/_synapse/client/oidc/callback` | +| Backchannel Logout URL (optional) | `[synapse public baseurl]/_synapse/client/oidc/backchannel_logout` | +| Backchannel Logout Session Required (optional) | `On` | 5. Click `Save` 6. On the Credentials tab, update the fields: @@ -167,7 +179,9 @@ oidc_providers: config: localpart_template: "{{ user.preferred_username }}" display_name_template: "{{ user.name }}" + backchannel_logout_enabled: true # Optional ``` + ### Auth0 [Auth0][auth0] is a hosted SaaS IdP solution. diff --git a/docs/usage/configuration/config_documentation.md b/docs/usage/configuration/config_documentation.md index 97fb505a5f..44358faf59 100644 --- a/docs/usage/configuration/config_documentation.md +++ b/docs/usage/configuration/config_documentation.md @@ -3021,6 +3021,15 @@ Options for each entry include: which is set to the claims returned by the UserInfo Endpoint and/or in the ID Token. +* `backchannel_logout_enabled`: set to `true` to process OIDC Back-Channel Logout notifications. + Those notifications are expected to be received on `/_synapse/client/oidc/backchannel_logout`. + Defaults to `false`. + +* `backchannel_logout_ignore_sub`: by default, the OIDC Back-Channel Logout feature checks that the + `sub` claim matches the subject claim received during login. This check can be disabled by setting + this to `true`. Defaults to `false`. + + You might want to disable this if the `subject_claim` returned by the mapping provider is not `sub`. It is possible to configure Synapse to only allow logins if certain attributes match particular values in the OIDC userinfo. The requirements can be listed under diff --git a/synapse/config/oidc.py b/synapse/config/oidc.py index 5418a332da..0bd83f4010 100644 --- a/synapse/config/oidc.py +++ b/synapse/config/oidc.py @@ -123,6 +123,8 @@ OIDC_PROVIDER_CONFIG_SCHEMA = { "userinfo_endpoint": {"type": "string"}, "jwks_uri": {"type": "string"}, "skip_verification": {"type": "boolean"}, + "backchannel_logout_enabled": {"type": "boolean"}, + "backchannel_logout_ignore_sub": {"type": "boolean"}, "user_profile_method": { "type": "string", "enum": ["auto", "userinfo_endpoint"], @@ -292,6 +294,10 @@ def _parse_oidc_config_dict( token_endpoint=oidc_config.get("token_endpoint"), userinfo_endpoint=oidc_config.get("userinfo_endpoint"), jwks_uri=oidc_config.get("jwks_uri"), + backchannel_logout_enabled=oidc_config.get("backchannel_logout_enabled", False), + backchannel_logout_ignore_sub=oidc_config.get( + "backchannel_logout_ignore_sub", False + ), skip_verification=oidc_config.get("skip_verification", False), user_profile_method=oidc_config.get("user_profile_method", "auto"), allow_existing_users=oidc_config.get("allow_existing_users", False), @@ -368,6 +374,12 @@ class OidcProviderConfig: # "openid" scope is used. jwks_uri: Optional[str] + # Whether Synapse should react to backchannel logouts + backchannel_logout_enabled: bool + + # Whether Synapse should ignore the `sub` claim in backchannel logouts or not. + backchannel_logout_ignore_sub: bool + # Whether to skip metadata verification skip_verification: bool diff --git a/synapse/handlers/oidc.py b/synapse/handlers/oidc.py index 9759daf043..867973dcca 100644 --- a/synapse/handlers/oidc.py +++ b/synapse/handlers/oidc.py @@ -12,14 +12,28 @@ # 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 binascii import inspect +import json import logging -from typing import TYPE_CHECKING, Any, Dict, Generic, List, Optional, TypeVar, Union +from typing import ( + TYPE_CHECKING, + Any, + Dict, + Generic, + List, + Optional, + Type, + TypeVar, + Union, +) from urllib.parse import urlencode, urlparse import attr +import unpaddedbase64 from authlib.common.security import generate_token -from authlib.jose import JsonWebToken, jwt +from authlib.jose import JsonWebToken, JWTClaims +from authlib.jose.errors import InvalidClaimError, JoseError, MissingClaimError from authlib.oauth2.auth import ClientAuth from authlib.oauth2.rfc6749.parameters import prepare_grant_uri from authlib.oidc.core import CodeIDToken, UserInfo @@ -35,9 +49,12 @@ from typing_extensions import TypedDict from twisted.web.client import readBody from twisted.web.http_headers import Headers +from synapse.api.errors import SynapseError from synapse.config import ConfigError from synapse.config.oidc import OidcProviderClientSecretJwtKey, OidcProviderConfig from synapse.handlers.sso import MappingException, UserAttributes +from synapse.http.server import finish_request +from synapse.http.servlet import parse_string from synapse.http.site import SynapseRequest from synapse.logging.context import make_deferred_yieldable from synapse.types import JsonDict, UserID, map_username_to_mxid_localpart @@ -88,6 +105,8 @@ class Token(TypedDict): #: there is no real point of doing this in our case. JWK = Dict[str, str] +C = TypeVar("C") + #: A JWK Set, as per RFC7517 sec 5. class JWKS(TypedDict): @@ -247,6 +266,80 @@ class OidcHandler: await oidc_provider.handle_oidc_callback(request, session_data, code) + async def handle_backchannel_logout(self, request: SynapseRequest) -> None: + """Handle an incoming request to /_synapse/client/oidc/backchannel_logout + + This extracts the logout_token from the request and tries to figure out + which OpenID Provider it is comming from. This works by matching the iss claim + with the issuer and the aud claim with the client_id. + + Since at this point we don't know who signed the JWT, we can't just + decode it using authlib since it will always verifies the signature. We + have to decode it manually without validating the signature. The actual JWT + verification is done in the `OidcProvider.handler_backchannel_logout` method, + once we figured out which provider sent the request. + + Args: + request: the incoming request from the browser. + """ + logout_token = parse_string(request, "logout_token") + if logout_token is None: + raise SynapseError(400, "Missing logout_token in request") + + # A JWT looks like this: + # header.payload.signature + # where all parts are encoded with urlsafe base64. + # The aud and iss claims we care about are in the payload part, which + # is a JSON object. + try: + # By destructuring the list after splitting, we ensure that we have + # exactly 3 segments + _, payload, _ = logout_token.split(".") + except ValueError: + raise SynapseError(400, "Invalid logout_token in request") + + try: + payload_bytes = unpaddedbase64.decode_base64(payload) + claims = json_decoder.decode(payload_bytes.decode("utf-8")) + except (json.JSONDecodeError, binascii.Error, UnicodeError): + raise SynapseError(400, "Invalid logout_token payload in request") + + try: + # Let's extract the iss and aud claims + iss = claims["iss"] + aud = claims["aud"] + # The aud claim can be either a string or a list of string. Here we + # normalize it as a list of strings. + if isinstance(aud, str): + aud = [aud] + + # Check that we have the right types for the aud and the iss claims + if not isinstance(iss, str) or not isinstance(aud, list): + raise TypeError() + for a in aud: + if not isinstance(a, str): + raise TypeError() + + # At this point we properly checked both claims types + issuer: str = iss + audience: List[str] = aud + except (TypeError, KeyError): + raise SynapseError(400, "Invalid issuer/audience in logout_token") + + # Now that we know the audience and the issuer, we can figure out from + # what provider it is coming from + oidc_provider: Optional[OidcProvider] = None + for provider in self._providers.values(): + if provider.issuer == issuer and provider.client_id in audience: + oidc_provider = provider + break + + if oidc_provider is None: + raise SynapseError(400, "Could not find the OP that issued this event") + + # Ask the provider to handle the logout request. + await oidc_provider.handle_backchannel_logout(request, logout_token) + class OidcError(Exception): """Used to catch errors when calling the token_endpoint""" @@ -342,6 +435,7 @@ class OidcProvider: self.idp_brand = provider.idp_brand self._sso_handler = hs.get_sso_handler() + self._device_handler = hs.get_device_handler() self._sso_handler.register_identity_provider(self) @@ -400,6 +494,41 @@ class OidcProvider: # If we're not using userinfo, we need a valid jwks to validate the ID token m.validate_jwks_uri() + if self._config.backchannel_logout_enabled: + if not m.get("backchannel_logout_supported", False): + logger.warning( + "OIDC Back-Channel Logout is enabled for issuer %r" + "but it does not advertise support for it", + self.issuer, + ) + + elif not m.get("backchannel_logout_session_supported", False): + logger.warning( + "OIDC Back-Channel Logout is enabled and supported " + "by issuer %r but it might not send a session ID with " + "logout tokens, which is required for the logouts to work", + self.issuer, + ) + + if not self._config.backchannel_logout_ignore_sub: + # If OIDC backchannel logouts are enabled, the provider mapping provider + # should use the `sub` claim. We verify that by mapping a dumb user and + # see if we get back the sub claim + user = UserInfo({"sub": "thisisasubject"}) + try: + subject = self._user_mapping_provider.get_remote_user_id(user) + if subject != user["sub"]: + raise ValueError("Unexpected subject") + except Exception: + logger.warning( + f"OIDC Back-Channel Logout is enabled for issuer {self.issuer!r} " + "but it looks like the configured `user_mapping_provider` " + "does not use the `sub` claim as subject. If it is the case, " + "and you want Synapse to ignore the `sub` claim in OIDC " + "Back-Channel Logouts, set `backchannel_logout_ignore_sub` " + "to `true` in the issuer config." + ) + @property def _uses_userinfo(self) -> bool: """Returns True if the ``userinfo_endpoint`` should be used. @@ -415,6 +544,16 @@ class OidcProvider: or self._user_profile_method == "userinfo_endpoint" ) + @property + def issuer(self) -> str: + """The issuer identifying this provider.""" + return self._config.issuer + + @property + def client_id(self) -> str: + """The client_id used when interacting with this provider.""" + return self._config.client_id + async def load_metadata(self, force: bool = False) -> OpenIDProviderMetadata: """Return the provider metadata. @@ -662,6 +801,59 @@ class OidcProvider: return UserInfo(resp) + async def _verify_jwt( + self, + alg_values: List[str], + token: str, + claims_cls: Type[C], + claims_options: Optional[dict] = None, + claims_params: Optional[dict] = None, + ) -> C: + """Decode and validate a JWT, re-fetching the JWKS as needed. + + Args: + alg_values: list of `alg` values allowed when verifying the JWT. + token: the JWT. + claims_cls: the JWTClaims class to use to validate the claims. + claims_options: dict of options passed to the `claims_cls` constructor. + claims_params: dict of params passed to the `claims_cls` constructor. + + Returns: + The decoded claims in the JWT. + """ + jwt = JsonWebToken(alg_values) + + logger.debug("Attempting to decode JWT (%s) %r", claims_cls.__name__, token) + + # Try to decode the keys in cache first, then retry by forcing the keys + # to be reloaded + jwk_set = await self.load_jwks() + try: + claims = jwt.decode( + token, + key=jwk_set, + claims_cls=claims_cls, + claims_options=claims_options, + claims_params=claims_params, + ) + except ValueError: + logger.info("Reloading JWKS after decode error") + jwk_set = await self.load_jwks(force=True) # try reloading the jwks + claims = jwt.decode( + token, + key=jwk_set, + claims_cls=claims_cls, + claims_options=claims_options, + claims_params=claims_params, + ) + + logger.debug("Decoded JWT (%s) %r; validating", claims_cls.__name__, claims) + + claims.validate( + now=self._clock.time(), leeway=120 + ) # allows 2 min of clock skew + return claims + async def _parse_id_token(self, token: Token, nonce: str) -> CodeIDToken: """Return an instance of UserInfo from token's ``id_token``. @@ -675,13 +867,13 @@ class OidcProvider: The decoded claims in the ID token. """ id_token = token.get("id_token") - logger.debug("Attempting to decode JWT id_token %r", id_token) # That has been theoritically been checked by the caller, so even though # assertion are not enabled in production, it is mainly here to appease mypy assert id_token is not None metadata = await self.load_metadata() + claims_params = { "nonce": nonce, "client_id": self._client_auth.client_id, @@ -691,38 +883,17 @@ class OidcProvider: # in the `id_token` that we can check against. claims_params["access_token"] = token["access_token"] - alg_values = metadata.get("id_token_signing_alg_values_supported", ["RS256"]) - jwt = JsonWebToken(alg_values) - - claim_options = {"iss": {"values": [metadata["issuer"]]}} + claims_options = {"iss": {"values": [metadata["issuer"]]}} - # Try to decode the keys in cache first, then retry by forcing the keys - # to be reloaded - jwk_set = await self.load_jwks() - try: - claims = jwt.decode( - id_token, - key=jwk_set, - claims_cls=CodeIDToken, - claims_options=claim_options, - claims_params=claims_params, - ) - except ValueError: - logger.info("Reloading JWKS after decode error") - jwk_set = await self.load_jwks(force=True) # try reloading the jwks - claims = jwt.decode( - id_token, - key=jwk_set, - claims_cls=CodeIDToken, - claims_options=claim_options, - claims_params=claims_params, - ) - - logger.debug("Decoded id_token JWT %r; validating", claims) + alg_values = metadata.get("id_token_signing_alg_values_supported", ["RS256"]) - claims.validate( - now=self._clock.time(), leeway=120 - ) # allows 2 min of clock skew + claims = await self._verify_jwt( + alg_values=alg_values, + token=id_token, + claims_cls=CodeIDToken, + claims_options=claims_options, + claims_params=claims_params, + ) return claims @@ -1043,6 +1214,146 @@ class OidcProvider: # to be strings. return str(remote_user_id) + async def handle_backchannel_logout( + self, request: SynapseRequest, logout_token: str + ) -> None: + """Handle an incoming request to /_synapse/client/oidc/backchannel_logout + + The OIDC Provider posts a logout token to this endpoint when a user + session ends. That token is a JWT signed with the same keys as + ID tokens. The OpenID Connect Back-Channel Logout draft explains how to + validate the JWT and figure out what session to end. + + Args: + request: The request to respond to + logout_token: The logout token (a JWT) extracted from the request body + """ + # Back-Channel Logout can be disabled in the config, hence this check. + # This is not that important for now since Synapse is registered + # manually to the OP, so not specifying the backchannel-logout URI is + # as effective than disabling it here. It might make more sense if we + # support dynamic registration in Synapse at some point. + if not self._config.backchannel_logout_enabled: + logger.warning( + f"Received an OIDC Back-Channel Logout request from issuer {self.issuer!r} but it is disabled in config" + ) + + # TODO: this responds with a 400 status code, which is what the OIDC + # Back-Channel Logout spec expects, but spec also suggests answering with + # a JSON object, with the `error` and `error_description` fields set, which + # we are not doing here. + # See https://openid.net/specs/openid-connect-backchannel-1_0.html#BCResponse + raise SynapseError( + 400, "OpenID Connect Back-Channel Logout is disabled for this provider" + ) + + metadata = await self.load_metadata() + + # As per OIDC Back-Channel Logout 1.0 sec. 2.4: + # A Logout Token MUST be signed and MAY also be encrypted. The same + # keys are used to sign and encrypt Logout Tokens as are used for ID + # Tokens. If the Logout Token is encrypted, it SHOULD replicate the + # iss (issuer) claim in the JWT Header Parameters, as specified in + # Section 5.3 of [JWT]. + alg_values = metadata.get("id_token_signing_alg_values_supported", ["RS256"]) + + # As per sec. 2.6: + # 3. Validate the iss, aud, and iat Claims in the same way they are + # validated in ID Tokens. + # Which means the audience should contain Synapse's client_id and the + # issuer should be the IdP issuer + claims_options = { + "iss": {"values": [metadata["issuer"]]}, + "aud": {"values": [self.client_id]}, + } + + try: + claims = await self._verify_jwt( + alg_values=alg_values, + token=logout_token, + claims_cls=LogoutToken, + claims_options=claims_options, + ) + except JoseError: + logger.exception("Invalid logout_token") + raise SynapseError(400, "Invalid logout_token") + + # As per sec. 2.6: + # 4. Verify that the Logout Token contains a sub Claim, a sid Claim, + # or both. + # 5. Verify that the Logout Token contains an events Claim whose + # value is JSON object containing the member name + # http://schemas.openid.net/event/backchannel-logout. + # 6. Verify that the Logout Token does not contain a nonce Claim. + # This is all verified by the LogoutToken claims class, so at this + # point the `sid` claim exists and is a string. + sid: str = claims.get("sid") + + # If the `sub` claim was included in the logout token, we check that it matches + # that it matches the right user. We can have cases where the `sub` claim is not + # the ID saved in database, so we let admins disable this check in config. + sub: Optional[str] = claims.get("sub") + expected_user_id: Optional[str] = None + if sub is not None and not self._config.backchannel_logout_ignore_sub: + expected_user_id = await self._store.get_user_by_external_id( + self.idp_id, sub + ) + + # Invalidate any running user-mapping sessions, in-flight login tokens and + # active devices + await self._sso_handler.revoke_sessions_for_provider_session_id( + auth_provider_id=self.idp_id, + auth_provider_session_id=sid, + expected_user_id=expected_user_id, + ) + + request.setResponseCode(200) + request.setHeader(b"Cache-Control", b"no-cache, no-store") + request.setHeader(b"Pragma", b"no-cache") + finish_request(request) + + +class LogoutToken(JWTClaims): + """ + Holds and verify claims of a logout token, as per + https://openid.net/specs/openid-connect-backchannel-1_0.html#LogoutToken + """ + + REGISTERED_CLAIMS = ["iss", "sub", "aud", "iat", "jti", "events", "sid"] + + def validate(self, now: Optional[int] = None, leeway: int = 0) -> None: + """Validate everything in claims payload.""" + super().validate(now, leeway) + self.validate_sid() + self.validate_events() + self.validate_nonce() + + def validate_sid(self) -> None: + """Ensure the sid claim is present""" + sid = self.get("sid") + if not sid: + raise MissingClaimError("sid") + + if not isinstance(sid, str): + raise InvalidClaimError("sid") + + def validate_nonce(self) -> None: + """Ensure the nonce claim is absent""" + if "nonce" in self: + raise InvalidClaimError("nonce") + + def validate_events(self) -> None: + """Ensure the events claim is present and with the right value""" + events = self.get("events") + if not events: + raise MissingClaimError("events") + + if not isinstance(events, dict): + raise InvalidClaimError("events") + + if "http://schemas.openid.net/event/backchannel-logout" not in events: + raise InvalidClaimError("events") + # number of seconds a newly-generated client secret should be valid for CLIENT_SECRET_VALIDITY_SECONDS = 3600 @@ -1112,6 +1423,7 @@ class JwtClientSecret: logger.info( "Generating new JWT for %s: %s %s", self._oauth_issuer, header, payload ) + jwt = JsonWebToken(header["alg"]) self._cached_secret = jwt.encode(header, payload, self._key.key) self._cached_secret_replacement_time = ( expires_at - CLIENT_SECRET_MIN_VALIDITY_SECONDS @@ -1126,9 +1438,6 @@ class UserAttributeDict(TypedDict): emails: List[str] -C = TypeVar("C") - - class OidcMappingProvider(Generic[C]): """A mapping provider maps a UserInfo object to user attributes. diff --git a/synapse/handlers/sso.py b/synapse/handlers/sso.py index 5943f08e91..749d7e93b0 100644 --- a/synapse/handlers/sso.py +++ b/synapse/handlers/sso.py @@ -191,6 +191,7 @@ class SsoHandler: self._server_name = hs.hostname self._registration_handler = hs.get_registration_handler() self._auth_handler = hs.get_auth_handler() + self._device_handler = hs.get_device_handler() self._error_template = hs.config.sso.sso_error_template self._bad_user_template = hs.config.sso.sso_auth_bad_user_template self._profile_handler = hs.get_profile_handler() @@ -1026,6 +1027,76 @@ class SsoHandler: return True + async def revoke_sessions_for_provider_session_id( + self, + auth_provider_id: str, + auth_provider_session_id: str, + expected_user_id: Optional[str] = None, + ) -> None: + """Revoke any devices and in-flight logins tied to a provider session. + + Args: + auth_provider_id: A unique identifier for this SSO provider, e.g. + "oidc" or "saml". + auth_provider_session_id: The session ID from the provider to logout + expected_user_id: The user we're expecting to logout. If set, it will ignore + sessions belonging to other users and log an error. + """ + # Invalidate any running user-mapping sessions + to_delete = [] + for session_id, session in self._username_mapping_sessions.items(): + if ( + session.auth_provider_id == auth_provider_id + and session.auth_provider_session_id == auth_provider_session_id + ): + to_delete.append(session_id) + + for session_id in to_delete: + logger.info("Revoking mapping session %s", session_id) + del self._username_mapping_sessions[session_id] + + # Invalidate any in-flight login tokens + await self._store.invalidate_login_tokens_by_session_id( + auth_provider_id=auth_provider_id, + auth_provider_session_id=auth_provider_session_id, + ) + + # Fetch any device(s) in the store associated with the session ID. + devices = await self._store.get_devices_by_auth_provider_session_id( + auth_provider_id=auth_provider_id, + auth_provider_session_id=auth_provider_session_id, + ) + + # We have no guarantee that all the devices of that session are for the same + # `user_id`. Hence, we have to iterate over the list of devices and log them out + # one by one. + for device in devices: + user_id = device["user_id"] + device_id = device["device_id"] + + # If the user_id associated with that device/session is not the one we got + # out of the `sub` claim, skip that device and show log an error. + if expected_user_id is not None and user_id != expected_user_id: + logger.error( + "Received a logout notification from SSO provider " + f"{auth_provider_id!r} for the user {expected_user_id!r}, but with " + f"a session ID ({auth_provider_session_id!r}) which belongs to " + f"{user_id!r}. This may happen when the SSO provider user mapper " + "uses something else than the standard attribute as mapping ID. " + "For OIDC providers, set `backchannel_logout_ignore_sub` to `true` " + "in the provider config if that is the case." + ) + continue + + logger.info( + "Logging out %r (device %r) via SSO (%r) logout notification (session %r).", + user_id, + device_id, + auth_provider_id, + auth_provider_session_id, + ) + await self._device_handler.delete_devices(user_id, [device_id]) + def get_username_mapping_session_cookie_from_request(request: IRequest) -> str: """Extract the session ID from the cookie diff --git a/synapse/rest/synapse/client/oidc/__init__.py b/synapse/rest/synapse/client/oidc/__init__.py index 81fec39659..e4b28ce3df 100644 --- a/synapse/rest/synapse/client/oidc/__init__.py +++ b/synapse/rest/synapse/client/oidc/__init__.py @@ -17,6 +17,9 @@ from typing import TYPE_CHECKING from twisted.web.resource import Resource +from synapse.rest.synapse.client.oidc.backchannel_logout_resource import ( + OIDCBackchannelLogoutResource, +) from synapse.rest.synapse.client.oidc.callback_resource import OIDCCallbackResource if TYPE_CHECKING: @@ -29,6 +32,7 @@ class OIDCResource(Resource): def __init__(self, hs: "HomeServer"): Resource.__init__(self) self.putChild(b"callback", OIDCCallbackResource(hs)) + self.putChild(b"backchannel_logout", OIDCBackchannelLogoutResource(hs)) __all__ = ["OIDCResource"] diff --git a/synapse/rest/synapse/client/oidc/backchannel_logout_resource.py b/synapse/rest/synapse/client/oidc/backchannel_logout_resource.py new file mode 100644 index 0000000000..e07e76855a --- /dev/null +++ b/synapse/rest/synapse/client/oidc/backchannel_logout_resource.py @@ -0,0 +1,35 @@ +# Copyright 2022 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 logging +from typing import TYPE_CHECKING + +from synapse.http.server import DirectServeJsonResource +from synapse.http.site import SynapseRequest + +if TYPE_CHECKING: + from synapse.server import HomeServer + +logger = logging.getLogger(__name__) + + +class OIDCBackchannelLogoutResource(DirectServeJsonResource): + isLeaf = 1 + + def __init__(self, hs: "HomeServer"): + super().__init__() + self._oidc_handler = hs.get_oidc_handler() + + async def _async_render_POST(self, request: SynapseRequest) -> None: + await self._oidc_handler.handle_backchannel_logout(request) diff --git a/synapse/storage/databases/main/registration.py b/synapse/storage/databases/main/registration.py index 0255295317..5167089e03 100644 --- a/synapse/storage/databases/main/registration.py +++ b/synapse/storage/databases/main/registration.py @@ -1920,6 +1920,27 @@ class RegistrationWorkerStore(CacheInvalidationWorkerStore): self._clock.time_msec(), ) + async def invalidate_login_tokens_by_session_id( + self, auth_provider_id: str, auth_provider_session_id: str + ) -> None: + """Invalidate login tokens with the given IdP session ID. + + Args: + auth_provider_id: The SSO Identity Provider that the user authenticated with + to get this token + auth_provider_session_id: The session ID advertised by the SSO Identity + Provider + """ + await self.db_pool.simple_update( + table="login_tokens", + keyvalues={ + "auth_provider_id": auth_provider_id, + "auth_provider_session_id": auth_provider_session_id, + }, + updatevalues={"used_ts": self._clock.time_msec()}, + desc="invalidate_login_tokens_by_session_id", + ) + @cached() async def is_guest(self, user_id: str) -> bool: res = await self.db_pool.simple_select_one_onecol( diff --git a/tests/rest/client/test_auth.py b/tests/rest/client/test_auth.py index ebf653d018..847294dc8e 100644 --- a/tests/rest/client/test_auth.py +++ b/tests/rest/client/test_auth.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 re from http import HTTPStatus from typing import Any, Dict, List, Optional, Tuple, Union @@ -21,7 +22,7 @@ from twisted.web.resource import Resource import synapse.rest.admin from synapse.api.constants import ApprovalNoticeMedium, LoginType -from synapse.api.errors import Codes +from synapse.api.errors import Codes, SynapseError from synapse.handlers.ui_auth.checkers import UserInteractiveAuthChecker from synapse.rest.client import account, auth, devices, login, logout, register from synapse.rest.synapse.client import build_synapse_client_resource_tree @@ -32,8 +33,8 @@ from synapse.util import Clock from tests import unittest from tests.handlers.test_oidc import HAS_OIDC -from tests.rest.client.utils import TEST_OIDC_CONFIG -from tests.server import FakeChannel +from tests.rest.client.utils import TEST_OIDC_CONFIG, TEST_OIDC_ISSUER +from tests.server import FakeChannel, make_request from tests.unittest import override_config, skip_unless @@ -638,19 +639,6 @@ class RefreshAuthTests(unittest.HomeserverTestCase): {"refresh_token": refresh_token}, ) - def is_access_token_valid(self, access_token: str) -> bool: - """ - Checks whether an access token is valid, returning whether it is or not. - """ - code = self.make_request( - "GET", "/_matrix/client/v3/account/whoami", access_token=access_token - ).code - - # Either 200 or 401 is what we get back; anything else is a bug. - assert code in {HTTPStatus.OK, HTTPStatus.UNAUTHORIZED} - - return code == HTTPStatus.OK - def test_login_issue_refresh_token(self) -> None: """ A login response should include a refresh_token only if asked. @@ -847,29 +835,37 @@ class RefreshAuthTests(unittest.HomeserverTestCase): self.reactor.advance(59.0) # Both tokens should still be valid. - self.assertTrue(self.is_access_token_valid(refreshable_access_token)) - self.assertTrue(self.is_access_token_valid(nonrefreshable_access_token)) + self.helper.whoami(refreshable_access_token, expect_code=HTTPStatus.OK) + self.helper.whoami(nonrefreshable_access_token, expect_code=HTTPStatus.OK) # Advance to 61 s (just past 1 minute, the time of expiry) self.reactor.advance(2.0) # Only the non-refreshable token is still valid. - self.assertFalse(self.is_access_token_valid(refreshable_access_token)) - self.assertTrue(self.is_access_token_valid(nonrefreshable_access_token)) + self.helper.whoami( + refreshable_access_token, expect_code=HTTPStatus.UNAUTHORIZED + ) + self.helper.whoami(nonrefreshable_access_token, expect_code=HTTPStatus.OK) # Advance to 599 s (just shy of 10 minutes, the time of expiry) self.reactor.advance(599.0 - 61.0) # It's still the case that only the non-refreshable token is still valid. - self.assertFalse(self.is_access_token_valid(refreshable_access_token)) - self.assertTrue(self.is_access_token_valid(nonrefreshable_access_token)) + self.helper.whoami( + refreshable_access_token, expect_code=HTTPStatus.UNAUTHORIZED + ) + self.helper.whoami(nonrefreshable_access_token, expect_code=HTTPStatus.OK) # Advance to 601 s (just past 10 minutes, the time of expiry) self.reactor.advance(2.0) # Now neither token is valid. - self.assertFalse(self.is_access_token_valid(refreshable_access_token)) - self.assertFalse(self.is_access_token_valid(nonrefreshable_access_token)) + self.helper.whoami( + refreshable_access_token, expect_code=HTTPStatus.UNAUTHORIZED + ) + self.helper.whoami( + nonrefreshable_access_token, expect_code=HTTPStatus.UNAUTHORIZED + ) @override_config( {"refreshable_access_token_lifetime": "1m", "refresh_token_lifetime": "2m"} @@ -1165,3 +1161,349 @@ class RefreshAuthTests(unittest.HomeserverTestCase): # and no refresh token self.assertEqual(_table_length("access_tokens"), 0) self.assertEqual(_table_length("refresh_tokens"), 0) + + +def oidc_config( + id: str, with_localpart_template: bool, **kwargs: Any +) -> Dict[str, Any]: + """Sample OIDC provider config used in backchannel logout tests. + + Args: + id: IDP ID for this provider + with_localpart_template: Set to `true` to have a default localpart_template in + the `user_mapping_provider` config and skip the user mapping session + **kwargs: rest of the config + + Returns: + A dict suitable for the `oidc_config` or the `oidc_providers[]` parts of + the HS config + """ + config: Dict[str, Any] = { + "idp_id": id, + "idp_name": id, + "issuer": TEST_OIDC_ISSUER, + "client_id": "test-client-id", + "client_secret": "test-client-secret", + "scopes": ["openid"], + } + + if with_localpart_template: + config["user_mapping_provider"] = { + "config": {"localpart_template": "{{ user.sub }}"} + } + else: + config["user_mapping_provider"] = {"config": {}} + + config.update(kwargs) + + return config + + +@skip_unless(HAS_OIDC, "Requires OIDC") +class OidcBackchannelLogoutTests(unittest.HomeserverTestCase): + servlets = [ + account.register_servlets, + login.register_servlets, + ] + + def default_config(self) -> Dict[str, Any]: + config = super().default_config() + + # public_baseurl uses an http:// scheme because FakeChannel.isSecure() returns + # False, so synapse will see the requested uri as http://..., so using http in + # the public_baseurl stops Synapse trying to redirect to https. + config["public_baseurl"] = "http://synapse.test" + + return config + + def create_resource_dict(self) -> Dict[str, Resource]: + resource_dict = super().create_resource_dict() + resource_dict.update(build_synapse_client_resource_tree(self.hs)) + return resource_dict + + def submit_logout_token(self, logout_token: str) -> FakeChannel: + return self.make_request( + "POST", + "/_synapse/client/oidc/backchannel_logout", + content=f"logout_token={logout_token}", + content_is_form=True, + ) + + @override_config( + { + "oidc_providers": [ + oidc_config( + id="oidc", + with_localpart_template=True, + backchannel_logout_enabled=True, + ) + ] + } + ) + def test_simple_logout(self) -> None: + """ + Receiving a logout token should logout the user + """ + fake_oidc_server = self.helper.fake_oidc_server() + user = "john" + + login_resp, first_grant = self.helper.login_via_oidc( + fake_oidc_server, user, with_sid=True + ) + first_access_token: str = login_resp["access_token"] + self.helper.whoami(first_access_token, expect_code=HTTPStatus.OK) + + login_resp, second_grant = self.helper.login_via_oidc( + fake_oidc_server, user, with_sid=True + ) + second_access_token: str = login_resp["access_token"] + self.helper.whoami(second_access_token, expect_code=HTTPStatus.OK) + + self.assertNotEqual(first_grant.sid, second_grant.sid) + self.assertEqual(first_grant.userinfo["sub"], second_grant.userinfo["sub"]) + + # Logging out of the first session + logout_token = fake_oidc_server.generate_logout_token(first_grant) + channel = self.submit_logout_token(logout_token) + self.assertEqual(channel.code, 200) + + self.helper.whoami(first_access_token, expect_code=HTTPStatus.UNAUTHORIZED) + self.helper.whoami(second_access_token, expect_code=HTTPStatus.OK) + + # Logging out of the second session + logout_token = fake_oidc_server.generate_logout_token(second_grant) + channel = self.submit_logout_token(logout_token) + self.assertEqual(channel.code, 200) + + @override_config( + { + "oidc_providers": [ + oidc_config( + id="oidc", + with_localpart_template=True, + backchannel_logout_enabled=True, + ) + ] + } + ) + def test_logout_during_login(self) -> None: + """ + It should revoke login tokens when receiving a logout token + """ + fake_oidc_server = self.helper.fake_oidc_server() + user = "john" + + # Get an authentication, and logout before submitting the logout token + client_redirect_url = "https://x" + userinfo = {"sub": user} + channel, grant = self.helper.auth_via_oidc( + fake_oidc_server, + userinfo, + client_redirect_url, + with_sid=True, + ) + + # expect a confirmation page + self.assertEqual(channel.code, HTTPStatus.OK, channel.result) + + # fish the matrix login token out of the body of the confirmation page + m = re.search( + 'a href="%s.*loginToken=([^"]*)"' % (client_redirect_url,), + channel.text_body, + ) + assert m, channel.text_body + login_token = m.group(1) + + # Submit a logout + logout_token = fake_oidc_server.generate_logout_token(grant) + channel = self.submit_logout_token(logout_token) + self.assertEqual(channel.code, 200) + + # Now try to exchange the login token + channel = make_request( + self.hs.get_reactor(), + self.site, + "POST", + "/login", + content={"type": "m.login.token", "token": login_token}, + ) + # It should have failed + self.assertEqual(channel.code, 403) + + @override_config( + { + "oidc_providers": [ + oidc_config( + id="oidc", + with_localpart_template=False, + backchannel_logout_enabled=True, + ) + ] + } + ) + def test_logout_during_mapping(self) -> None: + """ + It should stop ongoing user mapping session when receiving a logout token + """ + fake_oidc_server = self.helper.fake_oidc_server() + user = "john" + + # Get an authentication, and logout before submitting the logout token + client_redirect_url = "https://x" + userinfo = {"sub": user} + channel, grant = self.helper.auth_via_oidc( + fake_oidc_server, + userinfo, + client_redirect_url, + with_sid=True, + ) + + # Expect a user mapping page + self.assertEqual(channel.code, HTTPStatus.FOUND, channel.result) + + # We should have a user_mapping_session cookie + cookie_headers = channel.headers.getRawHeaders("Set-Cookie") + assert cookie_headers + cookies: Dict[str, str] = {} + for h in cookie_headers: + key, value = h.split(";")[0].split("=", maxsplit=1) + cookies[key] = value + + user_mapping_session_id = cookies["username_mapping_session"] + + # Getting that session should not raise + session = self.hs.get_sso_handler().get_mapping_session(user_mapping_session_id) + self.assertIsNotNone(session) + + # Submit a logout + logout_token = fake_oidc_server.generate_logout_token(grant) + channel = self.submit_logout_token(logout_token) + self.assertEqual(channel.code, 200) + + # Now it should raise + with self.assertRaises(SynapseError): + self.hs.get_sso_handler().get_mapping_session(user_mapping_session_id) + + @override_config( + { + "oidc_providers": [ + oidc_config( + id="oidc", + with_localpart_template=True, + backchannel_logout_enabled=False, + ) + ] + } + ) + def test_disabled(self) -> None: + """ + Receiving a logout token should do nothing if it is disabled in the config + """ + fake_oidc_server = self.helper.fake_oidc_server() + user = "john" + + login_resp, grant = self.helper.login_via_oidc( + fake_oidc_server, user, with_sid=True + ) + access_token: str = login_resp["access_token"] + self.helper.whoami(access_token, expect_code=HTTPStatus.OK) + + # Logging out shouldn't work + logout_token = fake_oidc_server.generate_logout_token(grant) + channel = self.submit_logout_token(logout_token) + self.assertEqual(channel.code, 400) + + # And the token should still be valid + self.helper.whoami(access_token, expect_code=HTTPStatus.OK) + + @override_config( + { + "oidc_providers": [ + oidc_config( + id="oidc", + with_localpart_template=True, + backchannel_logout_enabled=True, + ) + ] + } + ) + def test_no_sid(self) -> None: + """ + Receiving a logout token without `sid` during the login should do nothing + """ + fake_oidc_server = self.helper.fake_oidc_server() + user = "john" + + login_resp, grant = self.helper.login_via_oidc( + fake_oidc_server, user, with_sid=False + ) + access_token: str = login_resp["access_token"] + self.helper.whoami(access_token, expect_code=HTTPStatus.OK) + + # Logging out shouldn't work + logout_token = fake_oidc_server.generate_logout_token(grant) + channel = self.submit_logout_token(logout_token) + self.assertEqual(channel.code, 400) + + # And the token should still be valid + self.helper.whoami(access_token, expect_code=HTTPStatus.OK) + + @override_config( + { + "oidc_providers": [ + oidc_config( + "first", + issuer="https://first-issuer.com/", + with_localpart_template=True, + backchannel_logout_enabled=True, + ), + oidc_config( + "second", + issuer="https://second-issuer.com/", + with_localpart_template=True, + backchannel_logout_enabled=True, + ), + ] + } + ) + def test_multiple_providers(self) -> None: + """ + It should be able to distinguish login tokens from two different IdPs + """ + first_server = self.helper.fake_oidc_server(issuer="https://first-issuer.com/") + second_server = self.helper.fake_oidc_server( + issuer="https://second-issuer.com/" + ) + user = "john" + + login_resp, first_grant = self.helper.login_via_oidc( + first_server, user, with_sid=True, idp_id="oidc-first" + ) + first_access_token: str = login_resp["access_token"] + self.helper.whoami(first_access_token, expect_code=HTTPStatus.OK) + + login_resp, second_grant = self.helper.login_via_oidc( + second_server, user, with_sid=True, idp_id="oidc-second" + ) + second_access_token: str = login_resp["access_token"] + self.helper.whoami(second_access_token, expect_code=HTTPStatus.OK) + + # `sid` in the fake providers are generated by a counter, so the first grant of + # each provider should give the same SID + self.assertEqual(first_grant.sid, second_grant.sid) + self.assertEqual(first_grant.userinfo["sub"], second_grant.userinfo["sub"]) + + # Logging out of the first session + logout_token = first_server.generate_logout_token(first_grant) + channel = self.submit_logout_token(logout_token) + self.assertEqual(channel.code, 200) + + self.helper.whoami(first_access_token, expect_code=HTTPStatus.UNAUTHORIZED) + self.helper.whoami(second_access_token, expect_code=HTTPStatus.OK) + + # Logging out of the second session + logout_token = second_server.generate_logout_token(second_grant) + channel = self.submit_logout_token(logout_token) + self.assertEqual(channel.code, 200) + + self.helper.whoami(second_access_token, expect_code=HTTPStatus.UNAUTHORIZED) diff --git a/tests/rest/client/utils.py b/tests/rest/client/utils.py index 967d229223..706399fae5 100644 --- a/tests/rest/client/utils.py +++ b/tests/rest/client/utils.py @@ -553,6 +553,34 @@ class RestHelper: return channel.json_body + def whoami( + self, + access_token: str, + expect_code: Literal[HTTPStatus.OK, HTTPStatus.UNAUTHORIZED] = HTTPStatus.OK, + ) -> JsonDict: + """Perform a 'whoami' request, which can be a quick way to check for access + token validity + + Args: + access_token: The user token to use during the request + expect_code: The return code to expect from attempting the whoami request + """ + channel = make_request( + self.hs.get_reactor(), + self.site, + "GET", + "account/whoami", + access_token=access_token, + ) + + assert channel.code == expect_code, "Exepcted: %d, got %d, resp: %r" % ( + expect_code, + channel.code, + channel.result["body"], + ) + + return channel.json_body + def fake_oidc_server(self, issuer: str = TEST_OIDC_ISSUER) -> FakeOidcServer: """Create a ``FakeOidcServer``. @@ -572,6 +600,7 @@ class RestHelper: fake_server: FakeOidcServer, remote_user_id: str, with_sid: bool = False, + idp_id: Optional[str] = None, expected_status: int = 200, ) -> Tuple[JsonDict, FakeAuthorizationGrant]: """Log in (as a new user) via OIDC @@ -588,7 +617,11 @@ class RestHelper: client_redirect_url = "https://x" userinfo = {"sub": remote_user_id} channel, grant = self.auth_via_oidc( - fake_server, userinfo, client_redirect_url, with_sid=with_sid + fake_server, + userinfo, + client_redirect_url, + with_sid=with_sid, + idp_id=idp_id, ) # expect a confirmation page @@ -623,6 +656,7 @@ class RestHelper: client_redirect_url: Optional[str] = None, ui_auth_session_id: Optional[str] = None, with_sid: bool = False, + idp_id: Optional[str] = None, ) -> Tuple[FakeChannel, FakeAuthorizationGrant]: """Perform an OIDC authentication flow via a mock OIDC provider. @@ -648,6 +682,7 @@ class RestHelper: ui_auth_session_id: if set, we will perform a UI Auth flow. The session id of the UI auth. with_sid: if True, generates a random `sid` (OIDC session ID) + idp_id: if set, explicitely chooses one specific IDP Returns: A FakeChannel containing the result of calling the OIDC callback endpoint. @@ -665,7 +700,9 @@ class RestHelper: oauth_uri = self.initiate_sso_ui_auth(ui_auth_session_id, cookies) else: # otherwise, hit the login redirect endpoint - oauth_uri = self.initiate_sso_login(client_redirect_url, cookies) + oauth_uri = self.initiate_sso_login( + client_redirect_url, cookies, idp_id=idp_id + ) # we now have a URI for the OIDC IdP, but we skip that and go straight # back to synapse's OIDC callback resource. However, we do need the "state" @@ -742,7 +779,10 @@ class RestHelper: return channel, grant def initiate_sso_login( - self, client_redirect_url: Optional[str], cookies: MutableMapping[str, str] + self, + client_redirect_url: Optional[str], + cookies: MutableMapping[str, str], + idp_id: Optional[str] = None, ) -> str: """Make a request to the login-via-sso redirect endpoint, and return the target @@ -753,6 +793,7 @@ class RestHelper: client_redirect_url: the client redirect URL to pass to the login redirect endpoint cookies: any cookies returned will be added to this dict + idp_id: if set, explicitely chooses one specific IDP Returns: the URI that the client gets redirected to (ie, the SSO server) @@ -761,6 +802,12 @@ class RestHelper: if client_redirect_url: params["redirectUrl"] = client_redirect_url + uri = "/_matrix/client/r0/login/sso/redirect" + if idp_id is not None: + uri = f"{uri}/{idp_id}" + + uri = f"{uri}?{urllib.parse.urlencode(params)}" + # hit the redirect url (which should redirect back to the redirect url. This # is the easiest way of figuring out what the Host header ought to be set to # to keep Synapse happy. @@ -768,7 +815,7 @@ class RestHelper: self.hs.get_reactor(), self.site, "GET", - "/_matrix/client/r0/login/sso/redirect?" + urllib.parse.urlencode(params), + uri, ) assert channel.code == 302 diff --git a/tests/server.py b/tests/server.py index 8b1d186219..b1730fcc8d 100644 --- a/tests/server.py +++ b/tests/server.py @@ -362,6 +362,12 @@ def make_request( # Twisted expects to be at the end of the content when parsing the request. req.content.seek(0, SEEK_END) + # Old version of Twisted (<20.3.0) have issues with parsing x-www-form-urlencoded + # bodies if the Content-Length header is missing + req.requestHeaders.addRawHeader( + b"Content-Length", str(len(content)).encode("ascii") + ) + if access_token: req.requestHeaders.addRawHeader( b"Authorization", b"Bearer " + access_token.encode("ascii") diff --git a/tests/test_utils/oidc.py b/tests/test_utils/oidc.py index de134bbc89..1461d23ee8 100644 --- a/tests/test_utils/oidc.py +++ b/tests/test_utils/oidc.py @@ -51,6 +51,8 @@ class FakeOidcServer: get_userinfo_handler: Mock post_token_handler: Mock + sid_counter: int = 0 + def __init__(self, clock: Clock, issuer: str): from authlib.jose import ECKey, KeySet @@ -146,7 +148,7 @@ class FakeOidcServer: return jws.serialize_compact(protected, json_payload, self._key).decode("utf-8") def generate_id_token(self, grant: FakeAuthorizationGrant) -> str: - now = self._clock.time() + now = int(self._clock.time()) id_token = { **grant.userinfo, "iss": self.issuer, @@ -166,6 +168,26 @@ class FakeOidcServer: return self._sign(id_token) + def generate_logout_token(self, grant: FakeAuthorizationGrant) -> str: + now = int(self._clock.time()) + logout_token = { + "iss": self.issuer, + "aud": grant.client_id, + "iat": now, + "jti": random_string(10), + "events": { + "http://schemas.openid.net/event/backchannel-logout": {}, + }, + } + + if grant.sid is not None: + logout_token["sid"] = grant.sid + + if "sub" in grant.userinfo: + logout_token["sub"] = grant.userinfo["sub"] + + return self._sign(logout_token) + def id_token_override(self, overrides: dict): """Temporarily patch the ID token generated by the token endpoint.""" return patch.object(self, "_id_token_overrides", overrides) @@ -183,7 +205,8 @@ class FakeOidcServer: code = random_string(10) sid = None if with_sid: - sid = random_string(10) + sid = str(self.sid_counter) + self.sid_counter += 1 grant = FakeAuthorizationGrant( userinfo=userinfo, -- cgit 1.5.1 From 86c5a710d8b4212f8a8a668d7d4a79c0bb371508 Mon Sep 17 00:00:00 2001 From: Brendan Abolivier Date: Thu, 3 Nov 2022 16:21:31 +0000 Subject: Implement MSC3912: Relation-based redactions (#14260) Co-authored-by: Sean Quah <8349537+squahtx@users.noreply.github.com> --- changelog.d/14260.feature | 1 + synapse/api/constants.py | 2 + synapse/config/experimental.py | 3 + synapse/handlers/message.py | 47 ++++- synapse/handlers/relations.py | 56 +++++- synapse/rest/client/room.py | 57 ++++-- synapse/rest/client/versions.py | 2 + synapse/storage/databases/main/relations.py | 36 ++++ tests/rest/client/test_redactions.py | 273 +++++++++++++++++++++++++++- tests/rest/client/utils.py | 37 ++++ 10 files changed, 486 insertions(+), 28 deletions(-) create mode 100644 changelog.d/14260.feature (limited to 'tests/rest/client/utils.py') diff --git a/changelog.d/14260.feature b/changelog.d/14260.feature new file mode 100644 index 0000000000..102dc7b3e0 --- /dev/null +++ b/changelog.d/14260.feature @@ -0,0 +1 @@ +Add experimental support for [MSC3912](https://github.com/matrix-org/matrix-spec-proposals/pull/3912): Relation-based redactions. diff --git a/synapse/api/constants.py b/synapse/api/constants.py index 44c5ffc6a5..bc04a0755b 100644 --- a/synapse/api/constants.py +++ b/synapse/api/constants.py @@ -125,6 +125,8 @@ class EventTypes: MSC2716_BATCH: Final = "org.matrix.msc2716.batch" MSC2716_MARKER: Final = "org.matrix.msc2716.marker" + Reaction: Final = "m.reaction" + class ToDeviceEventTypes: RoomKeyRequest: Final = "m.room_key_request" diff --git a/synapse/config/experimental.py b/synapse/config/experimental.py index d9bdd66d55..d4b71d1673 100644 --- a/synapse/config/experimental.py +++ b/synapse/config/experimental.py @@ -128,3 +128,6 @@ class ExperimentalConfig(Config): self.msc3886_endpoint: Optional[str] = experimental.get( "msc3886_endpoint", None ) + + # MSC3912: Relation-based redactions. + self.msc3912_enabled: bool = experimental.get("msc3912_enabled", False) diff --git a/synapse/handlers/message.py b/synapse/handlers/message.py index 468900a07f..4cf593cfdc 100644 --- a/synapse/handlers/message.py +++ b/synapse/handlers/message.py @@ -877,6 +877,36 @@ class EventCreationHandler: return prev_event return None + async def get_event_from_transaction( + self, + requester: Requester, + txn_id: str, + room_id: str, + ) -> Optional[EventBase]: + """For the given transaction ID and room ID, check if there is a matching event. + If so, fetch it and return it. + + Args: + requester: The requester making the request in the context of which we want + to fetch the event. + txn_id: The transaction ID. + room_id: The room ID. + + Returns: + An event if one could be found, None otherwise. + """ + if requester.access_token_id: + existing_event_id = await self.store.get_event_id_from_transaction_id( + room_id, + requester.user.to_string(), + requester.access_token_id, + txn_id, + ) + if existing_event_id: + return await self.store.get_event(existing_event_id) + + return None + async def create_and_send_nonmember_event( self, requester: Requester, @@ -956,18 +986,17 @@ class EventCreationHandler: # extremities to pile up, which in turn leads to state resolution # taking longer. async with self.limiter.queue(event_dict["room_id"]): - if txn_id and requester.access_token_id: - existing_event_id = await self.store.get_event_id_from_transaction_id( - event_dict["room_id"], - requester.user.to_string(), - requester.access_token_id, - txn_id, + if txn_id: + event = await self.get_event_from_transaction( + requester, txn_id, event_dict["room_id"] ) - if existing_event_id: - event = await self.store.get_event(existing_event_id) + if event: # we know it was persisted, so must have a stream ordering assert event.internal_metadata.stream_ordering - return event, event.internal_metadata.stream_ordering + return ( + event, + event.internal_metadata.stream_ordering, + ) event, context = await self.create_event( requester, diff --git a/synapse/handlers/relations.py b/synapse/handlers/relations.py index 0a0c6d938e..8e71dda970 100644 --- a/synapse/handlers/relations.py +++ b/synapse/handlers/relations.py @@ -17,7 +17,7 @@ from typing import TYPE_CHECKING, Dict, FrozenSet, Iterable, List, Optional, Tup import attr -from synapse.api.constants import RelationTypes +from synapse.api.constants import EventTypes, RelationTypes from synapse.api.errors import SynapseError from synapse.events import EventBase, relation_from_event from synapse.logging.opentracing import trace @@ -75,6 +75,7 @@ class RelationsHandler: self._clock = hs.get_clock() self._event_handler = hs.get_event_handler() self._event_serializer = hs.get_event_client_serializer() + self._event_creation_handler = hs.get_event_creation_handler() async def get_relations( self, @@ -205,6 +206,59 @@ class RelationsHandler: return related_events, next_token + async def redact_events_related_to( + self, + requester: Requester, + event_id: str, + initial_redaction_event: EventBase, + relation_types: List[str], + ) -> None: + """Redacts all events related to the given event ID with one of the given + relation types. + + This method is expected to be called when redacting the event referred to by + the given event ID. + + If an event cannot be redacted (e.g. because of insufficient permissions), log + the error and try to redact the next one. + + Args: + requester: The requester to redact events on behalf of. + event_id: The event IDs to look and redact relations of. + initial_redaction_event: The redaction for the event referred to by + event_id. + relation_types: The types of relations to look for. + + Raises: + ShadowBanError if the requester is shadow-banned + """ + related_event_ids = ( + await self._main_store.get_all_relations_for_event_with_types( + event_id, relation_types + ) + ) + + for related_event_id in related_event_ids: + try: + await self._event_creation_handler.create_and_send_nonmember_event( + requester, + { + "type": EventTypes.Redaction, + "content": initial_redaction_event.content, + "room_id": initial_redaction_event.room_id, + "sender": requester.user.to_string(), + "redacts": related_event_id, + }, + ratelimit=False, + ) + except SynapseError as e: + logger.warning( + "Failed to redact event %s (related to event %s): %s", + related_event_id, + event_id, + e.msg, + ) + async def get_annotations_for_event( self, event_id: str, diff --git a/synapse/rest/client/room.py b/synapse/rest/client/room.py index 01e5079963..91cb791139 100644 --- a/synapse/rest/client/room.py +++ b/synapse/rest/client/room.py @@ -52,6 +52,7 @@ from synapse.http.servlet import ( from synapse.http.site import SynapseRequest from synapse.logging.context import make_deferred_yieldable, run_in_background from synapse.logging.opentracing import set_tag +from synapse.metrics.background_process_metrics import run_as_background_process from synapse.rest.client._base import client_patterns from synapse.rest.client.transactions import HttpTransactionCache from synapse.storage.state import StateFilter @@ -1029,6 +1030,8 @@ class RoomRedactEventRestServlet(TransactionRestServlet): super().__init__(hs) self.event_creation_handler = hs.get_event_creation_handler() self.auth = hs.get_auth() + self._relation_handler = hs.get_relations_handler() + self._msc3912_enabled = hs.config.experimental.msc3912_enabled def register(self, http_server: HttpServer) -> None: PATTERNS = "/rooms/(?P[^/]*)/redact/(?P[^/]*)" @@ -1045,20 +1048,46 @@ class RoomRedactEventRestServlet(TransactionRestServlet): content = parse_json_object_from_request(request) try: - ( - event, - _, - ) = await self.event_creation_handler.create_and_send_nonmember_event( - requester, - { - "type": EventTypes.Redaction, - "content": content, - "room_id": room_id, - "sender": requester.user.to_string(), - "redacts": event_id, - }, - txn_id=txn_id, - ) + with_relations = None + if self._msc3912_enabled and "org.matrix.msc3912.with_relations" in content: + with_relations = content["org.matrix.msc3912.with_relations"] + del content["org.matrix.msc3912.with_relations"] + + # Check if there's an existing event for this transaction now (even though + # create_and_send_nonmember_event also does it) because, if there's one, + # then we want to skip the call to redact_events_related_to. + event = None + if txn_id: + event = await self.event_creation_handler.get_event_from_transaction( + requester, txn_id, room_id + ) + + if event is None: + ( + event, + _, + ) = await self.event_creation_handler.create_and_send_nonmember_event( + requester, + { + "type": EventTypes.Redaction, + "content": content, + "room_id": room_id, + "sender": requester.user.to_string(), + "redacts": event_id, + }, + txn_id=txn_id, + ) + + if with_relations: + run_as_background_process( + "redact_related_events", + self._relation_handler.redact_events_related_to, + requester=requester, + event_id=event_id, + initial_redaction_event=event, + relation_types=with_relations, + ) + event_id = event.event_id except ShadowBanError: event_id = "$" + random_string(43) diff --git a/synapse/rest/client/versions.py b/synapse/rest/client/versions.py index 9b1b72c68a..180a11ef88 100644 --- a/synapse/rest/client/versions.py +++ b/synapse/rest/client/versions.py @@ -119,6 +119,8 @@ class VersionsRestServlet(RestServlet): # Adds support for simple HTTP rendezvous as per MSC3886 "org.matrix.msc3886": self.config.experimental.msc3886_endpoint is not None, + # Adds support for relation-based redactions as per MSC3912. + "org.matrix.msc3912": self.config.experimental.msc3912_enabled, }, }, ) diff --git a/synapse/storage/databases/main/relations.py b/synapse/storage/databases/main/relations.py index c022510e76..ca431002c8 100644 --- a/synapse/storage/databases/main/relations.py +++ b/synapse/storage/databases/main/relations.py @@ -295,6 +295,42 @@ class RelationsWorkerStore(SQLBaseStore): "get_recent_references_for_event", _get_recent_references_for_event_txn ) + async def get_all_relations_for_event_with_types( + self, + event_id: str, + relation_types: List[str], + ) -> List[str]: + """Get the event IDs of all events that have a relation to the given event with + one of the given relation types. + + Args: + event_id: The event for which to look for related events. + relation_types: The types of relations to look for. + + Returns: + A list of the IDs of the events that relate to the given event with one of + the given relation types. + """ + + def get_all_relation_ids_for_event_with_types_txn( + txn: LoggingTransaction, + ) -> List[str]: + rows = self.db_pool.simple_select_many_txn( + txn=txn, + table="event_relations", + column="relation_type", + iterable=relation_types, + keyvalues={"relates_to_id": event_id}, + retcols=["event_id"], + ) + + return [row["event_id"] for row in rows] + + return await self.db_pool.runInteraction( + desc="get_all_relation_ids_for_event_with_types", + func=get_all_relation_ids_for_event_with_types_txn, + ) + async def event_includes_relation(self, event_id: str) -> bool: """Check if the given event relates to another event. diff --git a/tests/rest/client/test_redactions.py b/tests/rest/client/test_redactions.py index be4c67d68e..5dfe44defb 100644 --- a/tests/rest/client/test_redactions.py +++ b/tests/rest/client/test_redactions.py @@ -11,17 +11,18 @@ # 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. -from typing import List +from typing import List, Optional from twisted.test.proto_helpers import MemoryReactor +from synapse.api.constants import EventTypes, RelationTypes from synapse.rest import admin from synapse.rest.client import login, room, sync from synapse.server import HomeServer from synapse.types import JsonDict from synapse.util import Clock -from tests.unittest import HomeserverTestCase +from tests.unittest import HomeserverTestCase, override_config class RedactionsTestCase(HomeserverTestCase): @@ -67,7 +68,12 @@ class RedactionsTestCase(HomeserverTestCase): ) def _redact_event( - self, access_token: str, room_id: str, event_id: str, expect_code: int = 200 + self, + access_token: str, + room_id: str, + event_id: str, + expect_code: int = 200, + with_relations: Optional[List[str]] = None, ) -> JsonDict: """Helper function to send a redaction event. @@ -75,7 +81,13 @@ class RedactionsTestCase(HomeserverTestCase): """ path = "/_matrix/client/r0/rooms/%s/redact/%s" % (room_id, event_id) - channel = self.make_request("POST", path, content={}, access_token=access_token) + request_content = {} + if with_relations: + request_content["org.matrix.msc3912.with_relations"] = with_relations + + channel = self.make_request( + "POST", path, request_content, access_token=access_token + ) self.assertEqual(channel.code, expect_code) return channel.json_body @@ -201,3 +213,256 @@ class RedactionsTestCase(HomeserverTestCase): # These should all succeed, even though this would be denied by # the standard message ratelimiter self._redact_event(self.mod_access_token, self.room_id, msg_id) + + @override_config({"experimental_features": {"msc3912_enabled": True}}) + def test_redact_relations(self) -> None: + """Tests that we can redact the relations of an event at the same time as the + event itself. + """ + # Send a root event. + res = self.helper.send_event( + room_id=self.room_id, + type=EventTypes.Message, + content={"msgtype": "m.text", "body": "hello"}, + tok=self.mod_access_token, + ) + root_event_id = res["event_id"] + + # Send an edit to this root event. + res = self.helper.send_event( + room_id=self.room_id, + type=EventTypes.Message, + content={ + "body": " * hello world", + "m.new_content": { + "body": "hello world", + "msgtype": "m.text", + }, + "m.relates_to": { + "event_id": root_event_id, + "rel_type": RelationTypes.REPLACE, + }, + "msgtype": "m.text", + }, + tok=self.mod_access_token, + ) + edit_event_id = res["event_id"] + + # Also send a threaded message whose root is the same as the edit's. + res = self.helper.send_event( + room_id=self.room_id, + type=EventTypes.Message, + content={ + "msgtype": "m.text", + "body": "message 1", + "m.relates_to": { + "event_id": root_event_id, + "rel_type": RelationTypes.THREAD, + }, + }, + tok=self.mod_access_token, + ) + threaded_event_id = res["event_id"] + + # Also send a reaction, again with the same root. + res = self.helper.send_event( + room_id=self.room_id, + type=EventTypes.Reaction, + content={ + "m.relates_to": { + "rel_type": RelationTypes.ANNOTATION, + "event_id": root_event_id, + "key": "👍", + } + }, + tok=self.mod_access_token, + ) + reaction_event_id = res["event_id"] + + # Redact the root event, specifying that we also want to delete events that + # relate to it with m.replace. + self._redact_event( + self.mod_access_token, + self.room_id, + root_event_id, + with_relations=[ + RelationTypes.REPLACE, + RelationTypes.THREAD, + ], + ) + + # Check that the root event got redacted. + event_dict = self.helper.get_event( + self.room_id, root_event_id, self.mod_access_token + ) + self.assertIn("redacted_because", event_dict, event_dict) + + # Check that the edit got redacted. + event_dict = self.helper.get_event( + self.room_id, edit_event_id, self.mod_access_token + ) + self.assertIn("redacted_because", event_dict, event_dict) + + # Check that the threaded message got redacted. + event_dict = self.helper.get_event( + self.room_id, threaded_event_id, self.mod_access_token + ) + self.assertIn("redacted_because", event_dict, event_dict) + + # Check that the reaction did not get redacted. + event_dict = self.helper.get_event( + self.room_id, reaction_event_id, self.mod_access_token + ) + self.assertNotIn("redacted_because", event_dict, event_dict) + + @override_config({"experimental_features": {"msc3912_enabled": True}}) + def test_redact_relations_no_perms(self) -> None: + """Tests that, when redacting a message along with its relations, if not all + the related messages can be redacted because of insufficient permissions, the + server still redacts all the ones that can be. + """ + # Send a root event. + res = self.helper.send_event( + room_id=self.room_id, + type=EventTypes.Message, + content={ + "msgtype": "m.text", + "body": "root", + }, + tok=self.other_access_token, + ) + root_event_id = res["event_id"] + + # Send a first threaded message, this one from the moderator. We do this for the + # first message with the m.thread relation (and not the last one) to ensure + # that, when the server fails to redact it, it doesn't stop there, and it + # instead goes on to redact the other one. + res = self.helper.send_event( + room_id=self.room_id, + type=EventTypes.Message, + content={ + "msgtype": "m.text", + "body": "message 1", + "m.relates_to": { + "event_id": root_event_id, + "rel_type": RelationTypes.THREAD, + }, + }, + tok=self.mod_access_token, + ) + first_threaded_event_id = res["event_id"] + + # Send a second threaded message, this time from the user who'll perform the + # redaction. + res = self.helper.send_event( + room_id=self.room_id, + type=EventTypes.Message, + content={ + "msgtype": "m.text", + "body": "message 2", + "m.relates_to": { + "event_id": root_event_id, + "rel_type": RelationTypes.THREAD, + }, + }, + tok=self.other_access_token, + ) + second_threaded_event_id = res["event_id"] + + # Redact the thread's root, and request that all threaded messages are also + # redacted. Send that request from the non-mod user, so that the first threaded + # event cannot be redacted. + self._redact_event( + self.other_access_token, + self.room_id, + root_event_id, + with_relations=[RelationTypes.THREAD], + ) + + # Check that the thread root got redacted. + event_dict = self.helper.get_event( + self.room_id, root_event_id, self.other_access_token + ) + self.assertIn("redacted_because", event_dict, event_dict) + + # Check that the last message in the thread got redacted, despite failing to + # redact the one before it. + event_dict = self.helper.get_event( + self.room_id, second_threaded_event_id, self.other_access_token + ) + self.assertIn("redacted_because", event_dict, event_dict) + + # Check that the message that was sent into the tread by the mod user is not + # redacted. + event_dict = self.helper.get_event( + self.room_id, first_threaded_event_id, self.other_access_token + ) + self.assertIn("body", event_dict["content"], event_dict) + self.assertEqual("message 1", event_dict["content"]["body"]) + + @override_config({"experimental_features": {"msc3912_enabled": True}}) + def test_redact_relations_txn_id_reuse(self) -> None: + """Tests that redacting a message using a transaction ID, then reusing the same + transaction ID but providing an additional list of relations to redact, is + effectively a no-op. + """ + # Send a root event. + res = self.helper.send_event( + room_id=self.room_id, + type=EventTypes.Message, + content={ + "msgtype": "m.text", + "body": "root", + }, + tok=self.mod_access_token, + ) + root_event_id = res["event_id"] + + # Send a first threaded message. + res = self.helper.send_event( + room_id=self.room_id, + type=EventTypes.Message, + content={ + "msgtype": "m.text", + "body": "I'm in a thread!", + "m.relates_to": { + "event_id": root_event_id, + "rel_type": RelationTypes.THREAD, + }, + }, + tok=self.mod_access_token, + ) + threaded_event_id = res["event_id"] + + # Send a first redaction request which redacts only the root event. + channel = self.make_request( + method="PUT", + path=f"/rooms/{self.room_id}/redact/{root_event_id}/foo", + content={}, + access_token=self.mod_access_token, + ) + self.assertEqual(channel.code, 200) + + # Send a second redaction request which redacts the root event as well as + # threaded messages. + channel = self.make_request( + method="PUT", + path=f"/rooms/{self.room_id}/redact/{root_event_id}/foo", + content={"org.matrix.msc3912.with_relations": [RelationTypes.THREAD]}, + access_token=self.mod_access_token, + ) + self.assertEqual(channel.code, 200) + + # Check that the root event got redacted. + event_dict = self.helper.get_event( + self.room_id, root_event_id, self.mod_access_token + ) + self.assertIn("redacted_because", event_dict) + + # Check that the threaded message didn't get redacted (since that wasn't part of + # the original redaction). + event_dict = self.helper.get_event( + self.room_id, threaded_event_id, self.mod_access_token + ) + self.assertIn("body", event_dict["content"], event_dict) + self.assertEqual("I'm in a thread!", event_dict["content"]["body"]) diff --git a/tests/rest/client/utils.py b/tests/rest/client/utils.py index 706399fae5..8d6f2b6ff9 100644 --- a/tests/rest/client/utils.py +++ b/tests/rest/client/utils.py @@ -410,6 +410,43 @@ class RestHelper: return channel.json_body + def get_event( + self, + room_id: str, + event_id: str, + tok: Optional[str] = None, + expect_code: int = HTTPStatus.OK, + ) -> JsonDict: + """Request a specific event from the server. + + Args: + room_id: the room in which the event was sent. + event_id: the event's ID. + tok: the token to request the event with. + expect_code: the expected HTTP status for the response. + + Returns: + The event as a dict. + """ + path = f"/_matrix/client/v3/rooms/{room_id}/event/{event_id}" + if tok: + path = path + f"?access_token={tok}" + + channel = make_request( + self.hs.get_reactor(), + self.site, + "GET", + path, + ) + + assert channel.code == expect_code, "Expected: %d, got: %d, resp: %r" % ( + expect_code, + channel.code, + channel.result["body"], + ) + + return channel.json_body + def _read_write_state( self, room_id: str, -- cgit 1.5.1