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Fix bug where we added duplicate event IDs as auth_events (#6560)

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Erik Johnston 2019-12-17 15:06:08 +00:00 committed by GitHub
parent 5ca2cfadc3
commit 5029422530
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2 changed files with 9 additions and 7 deletions
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1
changelog.d/6560.bugfix Normal file
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@ -0,0 +1 @@
Fix a cause of state resets in room versions 2 onwards.

15
synapse/event_auth.py
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@ -14,6 +14,7 @@
# limitations under the License. # limitations under the License.
import logging import logging
from typing import Set, Tuple
from canonicaljson import encode_canonical_json from canonicaljson import encode_canonical_json
from signedjson.key import decode_verify_key_bytes from signedjson.key import decode_verify_key_bytes
@ -637,7 +638,7 @@ def get_public_keys(invite_event):
return public_keys return public_keys
def auth_types_for_event(event): def auth_types_for_event(event) -> Set[Tuple[str]]:
"""Given an event, return a list of (EventType, StateKey) that may be """Given an event, return a list of (EventType, StateKey) that may be
needed to auth the event. The returned list may be a superset of what needed to auth the event. The returned list may be a superset of what
would actually be required depending on the full state of the room. would actually be required depending on the full state of the room.
@ -646,20 +647,20 @@ def auth_types_for_event(event):
actually auth the event. actually auth the event.
""" """
if event.type == EventTypes.Create: if event.type == EventTypes.Create:
return [] return set()
auth_types = [ auth_types = {
(EventTypes.PowerLevels, ""), (EventTypes.PowerLevels, ""),
(EventTypes.Member, event.sender), (EventTypes.Member, event.sender),
(EventTypes.Create, ""), (EventTypes.Create, ""),
] }
if event.type == EventTypes.Member: if event.type == EventTypes.Member:
membership = event.content["membership"] membership = event.content["membership"]
if membership in [Membership.JOIN, Membership.INVITE]: if membership in [Membership.JOIN, Membership.INVITE]:
auth_types.append((EventTypes.JoinRules, "")) auth_types.add((EventTypes.JoinRules, ""))
auth_types.append((EventTypes.Member, event.state_key)) auth_types.add((EventTypes.Member, event.state_key))
if membership == Membership.INVITE: if membership == Membership.INVITE:
if "third_party_invite" in event.content: if "third_party_invite" in event.content:
@ -667,6 +668,6 @@ def auth_types_for_event(event):
EventTypes.ThirdPartyInvite, EventTypes.ThirdPartyInvite,
event.content["third_party_invite"]["signed"]["token"], event.content["third_party_invite"]["signed"]["token"],
) )
auth_types.append(key) auth_types.add(key)
return auth_types return auth_types