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Merge pull request #2323 from matrix-org/markjh/invite_checks

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Improve the error handling for bad invites received over federation
This commit is contained in:
Mark Haines 2017-07-04 10:50:43 +01:00 committed by GitHub
commit 1f12d808e7
1 changed files with 17 additions and 2 deletions
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19
synapse/handlers/federation.py
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@ -75,6 +75,7 @@ class FederationHandler(BaseHandler):
self.server_name = hs.hostname
self.keyring = hs.get_keyring()
self.action_generator = hs.get_action_generator()
self.is_mine_id = hs.is_mine_id
self.replication_layer.set_handler(self)
@ -1072,6 +1073,20 @@ class FederationHandler(BaseHandler):
if is_blocked:
raise SynapseError(403, "This room has been blocked on this server")
membership = event.content.get("membership")
if event.type != EventTypes.Member or membership != Membership.INVITE:
raise SynapseError(400, "The event was not an m.room.member invite event")
sender_domain = get_domain_from_id(event.sender)
if sender_domain != origin:
raise SynapseError(400, "The invite event was not from the server sending it")
if event.state_key is None:
raise SynapseError(400, "The invite event did not have a state key")
if not self.is_mine_id(event.state_key):
raise SynapseError(400, "The invite event must be for this server")
event.internal_metadata.outlier = True
event.internal_metadata.invite_from_remote = True
@ -1280,7 +1295,7 @@ class FederationHandler(BaseHandler):
for event in res:
# We sign these again because there was a bug where we
# incorrectly signed things the first time round
if self.hs.is_mine_id(event.event_id):
if self.is_mine_id(event.event_id):
event.signatures.update(
compute_event_signature(
event,
@ -1353,7 +1368,7 @@ class FederationHandler(BaseHandler):
)
if event:
if self.hs.is_mine_id(event.event_id):
if self.is_mine_id(event.event_id):
# FIXME: This is a temporary work around where we occasionally
# return events slightly differently than when they were
# originally signed