diff options
| -rw-r--r-- | synapse/handlers/_base.py | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/synapse/handlers/_base.py b/synapse/handlers/_base.py index d6c064b398..e91f1129db 100644 --- a/synapse/handlers/_base.py +++ b/synapse/handlers/_base.py @@ -18,7 +18,7 @@ from twisted.internet import defer from synapse.api.errors import LimitExceededError, SynapseError from synapse.crypto.event_signing import add_hashes_and_signatures from synapse.api.constants import Membership, EventTypes -from synapse.types import UserID +from synapse.types import UserID, RoomAlias from synapse.util.logcontext import PreserveLoggingContext @@ -130,6 +130,22 @@ class BaseHandler(object): returned_invite.signatures ) + if event.type == EventTypes.CanonicalAlias: + # Check the alias is acually valid (at this time at least) + room_alias_str = event.content.get("alias", None) + if room_alias_str: + room_alias = RoomAlias.from_string(room_alias_str) + directory_handler = self.hs.get_handlers().directory_handler + mapping = yield directory_handler.get_association(room_alias) + + if mapping["room_id"] != event.room_id: + raise SynapseError( + 400, + "Room alias %s does not point to the room" % ( + room_alias_str, + ) + ) + destinations = set(extra_destinations) for k, s in context.current_state.items(): try: |