From 0bf5ec0db700f189ba36360ea8424d9761658905 Mon Sep 17 00:00:00 2001 From: Richard van der Hoff Date: Thu, 2 Aug 2018 15:03:27 +0100 Subject: [PATCH] Check room visibility for /event/ requests Make sure that the user has permission to view the requeseted event for /event/{eventId} and /room/{roomId}/event/{eventId} requests. Also check that the event is in the given room for /room/{roomId}/event/{eventId}, for sanity. --- synapse/handlers/events.py | 25 +++++++++++++++++++++---- synapse/rest/client/v1/events.py | 2 +- synapse/rest/client/v1/room.py | 2 +- 3 files changed, 23 insertions(+), 6 deletions(-) diff --git a/synapse/handlers/events.py b/synapse/handlers/events.py index c3f2d7fef..f772e62c2 100644 --- a/synapse/handlers/events.py +++ b/synapse/handlers/events.py @@ -19,10 +19,12 @@ import random from twisted.internet import defer from synapse.api.constants import EventTypes, Membership +from synapse.api.errors import AuthError from synapse.events import EventBase from synapse.events.utils import serialize_event from synapse.types import UserID from synapse.util.logutils import log_function +from synapse.visibility import filter_events_for_client from ._base import BaseHandler @@ -129,11 +131,13 @@ class EventStreamHandler(BaseHandler): class EventHandler(BaseHandler): @defer.inlineCallbacks - def get_event(self, user, event_id): + def get_event(self, user, room_id, event_id): """Retrieve a single specified event. Args: user (synapse.types.UserID): The user requesting the event + room_id (str|None): The expected room id. We'll return None if the + event's room does not match. event_id (str): The event ID to obtain. Returns: dict: An event, or None if there is no event matching this ID. @@ -142,13 +146,26 @@ class EventHandler(BaseHandler): AuthError if the user does not have the rights to inspect this event. """ - event = yield self.store.get_event(event_id) + event = yield self.store.get_event(event_id, check_room_id=room_id) if not event: defer.returnValue(None) return - if hasattr(event, "room_id"): - yield self.auth.check_joined_room(event.room_id, user.to_string()) + users = yield self.store.get_users_in_room(event.room_id) + is_peeking = user.to_string() not in users + + filtered = yield filter_events_for_client( + self.store, + user.to_string(), + [event], + is_peeking=is_peeking + ) + + if not filtered: + raise AuthError( + 403, + "You don't have permission to access that event." + ) defer.returnValue(event) diff --git a/synapse/rest/client/v1/events.py b/synapse/rest/client/v1/events.py index b70c9c280..0f3a2e8b5 100644 --- a/synapse/rest/client/v1/events.py +++ b/synapse/rest/client/v1/events.py @@ -88,7 +88,7 @@ class EventRestServlet(ClientV1RestServlet): @defer.inlineCallbacks def on_GET(self, request, event_id): requester = yield self.auth.get_user_by_req(request) - event = yield self.event_handler.get_event(requester.user, event_id) + event = yield self.event_handler.get_event(requester.user, None, event_id) time_now = self.clock.time_msec() if event: diff --git a/synapse/rest/client/v1/room.py b/synapse/rest/client/v1/room.py index 3d6244785..2a679ac83 100644 --- a/synapse/rest/client/v1/room.py +++ b/synapse/rest/client/v1/room.py @@ -508,7 +508,7 @@ class RoomEventServlet(ClientV1RestServlet): @defer.inlineCallbacks def on_GET(self, request, room_id, event_id): requester = yield self.auth.get_user_by_req(request) - event = yield self.event_handler.get_event(requester.user, event_id) + event = yield self.event_handler.get_event(requester.user, room_id, event_id) time_now = self.clock.time_msec() if event: