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Update MSC3083 support per changes in the MSC. (#10189)

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Adds a "type" field and generalize "space" to "room_id".
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Patrick Cloke 2021-06-17 12:53:27 -04:00 • committed by GitHub
parent fcf3c7032b
commit 8c97d5863f
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4 changed files with 47 additions and 31 deletions
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45
synapse/handlers/event_auth.py
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@ -13,7 +13,12 @@
# limitations under the License.
from typing import TYPE_CHECKING, Collection, Optional
from synapse.api.constants import EventTypes, JoinRules, Membership
from synapse.api.constants import (
EventTypes,
JoinRules,
Membership,
RestrictedJoinRuleTypes,
)
from synapse.api.errors import AuthError
from synapse.api.room_versions import RoomVersion
from synapse.events import EventBase
@ -42,7 +47,7 @@ class EventAuthHandler:
Check whether a user can join a room without an invite due to restricted join rules.
When joining a room with restricted joined rules (as defined in MSC3083),
the membership of spaces must be checked during a room join.
the membership of rooms must be checked during a room join.
Args:
state_ids: The state of the room as it currently is.
@ -67,20 +72,20 @@ class EventAuthHandler:
if not await self.has_restricted_join_rules(state_ids, room_version):
return
# Get the spaces which allow access to this room and check if the user is
# Get the rooms which allow access to this room and check if the user is
# in any of them.
allowed_spaces = await self.get_spaces_that_allow_join(state_ids)
if not await self.is_user_in_rooms(allowed_spaces, user_id):
allowed_rooms = await self.get_rooms_that_allow_join(state_ids)
if not await self.is_user_in_rooms(allowed_rooms, user_id):
raise AuthError(
403,
"You do not belong to any of the required spaces to join this room.",
"You do not belong to any of the required rooms to join this room.",
)
async def has_restricted_join_rules(
self, state_ids: StateMap[str], room_version: RoomVersion
) -> bool:
"""
Return if the room has the proper join rules set for access via spaces.
Return if the room has the proper join rules set for access via rooms.
Args:
state_ids: The state of the room as it currently is.
@ -102,17 +107,17 @@ class EventAuthHandler:
join_rules_event = await self._store.get_event(join_rules_event_id)
return join_rules_event.content.get("join_rule") == JoinRules.MSC3083_RESTRICTED
async def get_spaces_that_allow_join(
async def get_rooms_that_allow_join(
self, state_ids: StateMap[str]
) -> Collection[str]:
"""
Generate a list of spaces which allow access to a room.
Generate a list of rooms in which membership allows access to a room.
Args:
state_ids: The state of the room as it currently is.
state_ids: The current state of the room the user wishes to join
Returns:
A collection of spaces which provide membership to the room.
A collection of room IDs. Membership in any of the rooms in the list grants the ability to join the target room.
"""
# If there's no join rule, then it defaults to invite (so this doesn't apply).
join_rules_event_id = state_ids.get((EventTypes.JoinRules, ""), None)
@ -123,21 +128,25 @@ class EventAuthHandler:
join_rules_event = await self._store.get_event(join_rules_event_id)
# If allowed is of the wrong form, then only allow invited users.
allowed_spaces = join_rules_event.content.get("allow", [])
if not isinstance(allowed_spaces, list):
allow_list = join_rules_event.content.get("allow", [])
if not isinstance(allow_list, list):
return ()
# Pull out the other room IDs, invalid data gets filtered.
result = []
for space in allowed_spaces:
if not isinstance(space, dict):
for allow in allow_list:
if not isinstance(allow, dict):
continue
space_id = space.get("space")
if not isinstance(space_id, str):
# If the type is unexpected, skip it.
if allow.get("type") != RestrictedJoinRuleTypes.ROOM_MEMBERSHIP:
continue
result.append(space_id)
room_id = allow.get("room_id")
if not isinstance(room_id, str):
continue
result.append(room_id)
return result