diff options
Diffstat (limited to 'synapse/handlers/auth.py')
| -rw-r--r-- | synapse/handlers/auth.py | 37 |
1 files changed, 33 insertions, 4 deletions
diff --git a/synapse/handlers/auth.py b/synapse/handlers/auth.py index 7860f9625e..2ce1425dfa 100644 --- a/synapse/handlers/auth.py +++ b/synapse/handlers/auth.py @@ -125,7 +125,11 @@ class AuthHandler(BaseHandler): @defer.inlineCallbacks def validate_user_via_ui_auth( - self, requester: Requester, request_body: Dict[str, Any], clientip: str + self, + requester: Requester, + request: SynapseRequest, + request_body: Dict[str, Any], + clientip: str, ): """ Checks that the user is who they claim to be, via a UI auth. @@ -137,6 +141,8 @@ class AuthHandler(BaseHandler): Args: requester: The user, as given by the access token + request: The request sent by the client. + request_body: The body of the request sent by the client clientip: The IP address of the client. @@ -172,7 +178,9 @@ class AuthHandler(BaseHandler): flows = [[login_type] for login_type in self._supported_login_types] try: - result, params, _ = yield self.check_auth(flows, request_body, clientip) + result, params, _ = yield self.check_auth( + flows, request, request_body, clientip + ) except LoginError: # Update the ratelimite to say we failed (`can_do_action` doesn't raise). self._failed_uia_attempts_ratelimiter.can_do_action( @@ -211,7 +219,11 @@ class AuthHandler(BaseHandler): @defer.inlineCallbacks def check_auth( - self, flows: List[List[str]], clientdict: Dict[str, Any], clientip: str + self, + flows: List[List[str]], + request: SynapseRequest, + clientdict: Dict[str, Any], + clientip: str, ): """ Takes a dictionary sent by the client in the login / registration @@ -231,6 +243,8 @@ class AuthHandler(BaseHandler): strings representing auth-types. At least one full flow must be completed in order for auth to be successful. + request: The request sent by the client. + clientdict: The dictionary from the client root level, not the 'auth' key: this method prompts for auth if none is sent. @@ -270,13 +284,27 @@ class AuthHandler(BaseHandler): # email auth link on there). It's probably too open to abuse # because it lets unauthenticated clients store arbitrary objects # on a homeserver. - # Revisit: Assumimg the REST APIs do sensible validation, the data + # Revisit: Assuming the REST APIs do sensible validation, the data # isn't arbintrary. session["clientdict"] = clientdict self._save_session(session) elif "clientdict" in session: clientdict = session["clientdict"] + # Ensure that the queried operation does not vary between stages of + # the UI authentication session. This is done by generating a stable + # comparator based on the URI, method, and body (minus the auth dict) + # and storing it during the initial query. Subsequent queries ensure + # that this comparator has not changed. + comparator = (request.uri, request.method, clientdict) + if "ui_auth" not in session: + session["ui_auth"] = comparator + elif session["ui_auth"] != comparator: + raise SynapseError( + 403, + "Requested operation has changed during the UI authentication session.", + ) + if not authdict: raise InteractiveAuthIncompleteError( self._auth_dict_for_flows(flows, session) @@ -322,6 +350,7 @@ class AuthHandler(BaseHandler): creds, list(clientdict), ) + return creds, clientdict, session["id"] ret = self._auth_dict_for_flows(flows, session) |