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Validate well-known state events are state events.

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Lets disallow sending things like memberships, topics etc as non-state
events.
This commit is contained in:
Erik Johnston 2019-07-31 16:36:20 +01:00
parent 02735e140f
commit dc4d74e44a
1 changed files with 9 additions and 2 deletions
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11
synapse/events/validator.py
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@ -95,10 +95,10 @@ class EventValidator(object):
elif event.type == EventTypes.Topic: elif event.type == EventTypes.Topic:
self._ensure_strings(event.content, ["topic"]) self._ensure_strings(event.content, ["topic"])
self._ensure_state_event(event)
elif event.type == EventTypes.Name: elif event.type == EventTypes.Name:
self._ensure_strings(event.content, ["name"]) self._ensure_strings(event.content, ["name"])
self._ensure_state_event(event)
elif event.type == EventTypes.Member: elif event.type == EventTypes.Member:
if "membership" not in event.content: if "membership" not in event.content:
raise SynapseError(400, "Content has not membership key") raise SynapseError(400, "Content has not membership key")
@ -106,6 +106,7 @@ class EventValidator(object):
if event.content["membership"] not in Membership.LIST: if event.content["membership"] not in Membership.LIST:
raise SynapseError(400, "Invalid membership key") raise SynapseError(400, "Invalid membership key")
self._ensure_state_event(event)
elif event.type == EventTypes.Tombstone: elif event.type == EventTypes.Tombstone:
if "replacement_room" not in event.content: if "replacement_room" not in event.content:
raise SynapseError(400, "Content has no replacement_room key") raise SynapseError(400, "Content has no replacement_room key")
@ -113,9 +114,15 @@ class EventValidator(object):
if event.content["replacement_room"] == event.room_id: if event.content["replacement_room"] == event.room_id:
raise SynapseError(400, "Tombstone cannot reference itself") raise SynapseError(400, "Tombstone cannot reference itself")
self._ensure_state_event(event)
def _ensure_strings(self, d, keys): def _ensure_strings(self, d, keys):
for s in keys: for s in keys:
if s not in d: if s not in d:
raise SynapseError(400, "'%s' not in content" % (s,)) raise SynapseError(400, "'%s' not in content" % (s,))
if not isinstance(d[s], string_types): if not isinstance(d[s], string_types):
raise SynapseError(400, "'%s' not a string type" % (s,)) raise SynapseError(400, "'%s' not a string type" % (s,))
def _ensure_state_event(self, event):
if not event.is_state():
raise SynapseError(400, "'%s' must be state events" % (event.type,))