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Check that the canonical room alias actually points to the room

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This commit is contained in:
Erik Johnston 2015-08-20 09:55:04 +01:00
parent d7272f8d9d
commit aadb2238c9
1 changed files with 17 additions and 1 deletions
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18
synapse/handlers/_base.py
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@ -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: