diff --git a/synapse/event_auth.py b/synapse/event_auth.py
index 9863953f5c..b2d8ba7849 100644
--- a/synapse/event_auth.py
+++ b/synapse/event_auth.py
@@ -161,6 +161,7 @@ def check(
if logger.isEnabledFor(logging.DEBUG):
logger.debug("Auth events: %s", [a.event_id for a in auth_events.values()])
+ # 5. If type is m.room.membership
if event.type == EventTypes.Member:
_is_membership_change_allowed(room_version_obj, event, auth_events)
logger.debug("Allowing! %s", event)
@@ -258,6 +259,7 @@ def _is_membership_change_allowed(
caller_in_room = caller and caller.membership == Membership.JOIN
caller_invited = caller and caller.membership == Membership.INVITE
+ caller_knocked = caller and caller.membership == Membership.KNOCK
# get info about the target
key = (EventTypes.Member, target_user_id)
@@ -300,9 +302,12 @@ def _is_membership_change_allowed(
raise AuthError(403, "%s is banned from the room" % (target_user_id,))
return
- if Membership.JOIN != membership:
+ # Require the user to be in the room for membership changes other than join/knock.
+ if Membership.JOIN != membership and Membership.KNOCK != membership:
+ # If the user has been invited or has knocked, they are allowed to change their
+ # membership event to leave
if (
- caller_invited
+ (caller_invited or caller_knocked)
and Membership.LEAVE == membership
and target_user_id == event.user_id
):
@@ -340,7 +345,7 @@ def _is_membership_change_allowed(
and join_rule == JoinRules.MSC3083_RESTRICTED
):
pass
- elif join_rule == JoinRules.INVITE:
+ elif join_rule in (JoinRules.INVITE, JoinRules.KNOCK):
if not caller_in_room and not caller_invited:
raise AuthError(403, "You are not invited to this room.")
else:
@@ -359,6 +364,17 @@ def _is_membership_change_allowed(
elif Membership.BAN == membership:
if user_level < ban_level or user_level <= target_level:
raise AuthError(403, "You don't have permission to ban")
+ elif Membership.KNOCK == membership:
+ if join_rule != JoinRules.KNOCK:
+ raise AuthError(403, "You don't have permission to knock")
+ elif target_user_id != event.user_id:
+ raise AuthError(403, "You cannot knock for other users")
+ elif target_in_room:
+ raise AuthError(403, "You cannot knock on a room you are already in")
+ elif caller_invited:
+ raise AuthError(403, "You are already invited to this room")
+ elif target_banned:
+ raise AuthError(403, "You are banned from this room")
else:
raise AuthError(500, "Unknown membership %s" % membership)
@@ -719,7 +735,7 @@ def auth_types_for_event(event: EventBase) -> Set[Tuple[str, str]]:
if event.type == EventTypes.Member:
membership = event.content["membership"]
- if membership in [Membership.JOIN, Membership.INVITE]:
+ if membership in [Membership.JOIN, Membership.INVITE, Membership.KNOCK]:
auth_types.add((EventTypes.JoinRules, ""))
auth_types.add((EventTypes.Member, event.state_key))
|
