mirror of
https://git.anonymousland.org/anonymousland/synapse.git
synced 2024-09-07 09:21:53 +00:00
Allow deleting an alias if the user has sufficient power level (#6986)
This commit is contained in:
parent
8ef8fb2c1c
commit
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1
changelog.d/6986.feature
Normal file
1
changelog.d/6986.feature
Normal file
@ -0,0 +1 @@
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Users with a power level sufficient to modify the canonical alias of a room can now delete room aliases.
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@ -539,7 +539,7 @@ class Auth(object):
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@defer.inlineCallbacks
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def check_can_change_room_list(self, room_id: str, user: UserID):
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"""Check if the user is allowed to edit the room's entry in the
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"""Determine whether the user is allowed to edit the room's entry in the
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published room list.
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Args:
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@ -570,12 +570,7 @@ class Auth(object):
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)
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user_level = event_auth.get_user_power_level(user_id, auth_events)
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if user_level < send_level:
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raise AuthError(
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403,
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"This server requires you to be a moderator in the room to"
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" edit its room list entry",
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)
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return user_level >= send_level
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@staticmethod
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def has_access_token(request):
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@ -15,7 +15,7 @@
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import logging
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import string
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from typing import List
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from typing import Iterable, List, Optional
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from twisted.internet import defer
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@ -28,6 +28,7 @@ from synapse.api.errors import (
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StoreError,
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SynapseError,
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)
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from synapse.appservice import ApplicationService
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from synapse.types import Requester, RoomAlias, UserID, get_domain_from_id
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from ._base import BaseHandler
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@ -55,7 +56,13 @@ class DirectoryHandler(BaseHandler):
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self.spam_checker = hs.get_spam_checker()
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@defer.inlineCallbacks
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def _create_association(self, room_alias, room_id, servers=None, creator=None):
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def _create_association(
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self,
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room_alias: RoomAlias,
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room_id: str,
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servers: Optional[Iterable[str]] = None,
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creator: Optional[str] = None,
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):
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# general association creation for both human users and app services
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for wchar in string.whitespace:
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@ -81,17 +88,21 @@ class DirectoryHandler(BaseHandler):
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@defer.inlineCallbacks
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def create_association(
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self, requester, room_alias, room_id, servers=None, check_membership=True,
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self,
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requester: Requester,
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room_alias: RoomAlias,
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room_id: str,
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servers: Optional[List[str]] = None,
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check_membership: bool = True,
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):
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"""Attempt to create a new alias
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Args:
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requester (Requester)
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room_alias (RoomAlias)
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room_id (str)
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servers (list[str]|None): List of servers that others servers
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should try and join via
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check_membership (bool): Whether to check if the user is in the room
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requester
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room_alias
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room_id
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servers: Iterable of servers that others servers should try and join via
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check_membership: Whether to check if the user is in the room
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before the alias can be set (if the server's config requires it).
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Returns:
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@ -145,15 +156,15 @@ class DirectoryHandler(BaseHandler):
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yield self._create_association(room_alias, room_id, servers, creator=user_id)
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@defer.inlineCallbacks
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def delete_association(self, requester, room_alias):
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def delete_association(self, requester: Requester, room_alias: RoomAlias):
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"""Remove an alias from the directory
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(this is only meant for human users; AS users should call
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delete_appservice_association)
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Args:
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requester (Requester):
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room_alias (RoomAlias):
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requester
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room_alias
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Returns:
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Deferred[unicode]: room id that the alias used to point to
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@ -189,16 +200,16 @@ class DirectoryHandler(BaseHandler):
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room_id = yield self._delete_association(room_alias)
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try:
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yield self._update_canonical_alias(
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requester, requester.user.to_string(), room_id, room_alias
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)
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yield self._update_canonical_alias(requester, user_id, room_id, room_alias)
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except AuthError as e:
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logger.info("Failed to update alias events: %s", e)
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return room_id
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@defer.inlineCallbacks
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def delete_appservice_association(self, service, room_alias):
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def delete_appservice_association(
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self, service: ApplicationService, room_alias: RoomAlias
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):
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if not service.is_interested_in_alias(room_alias.to_string()):
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raise SynapseError(
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400,
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@ -208,7 +219,7 @@ class DirectoryHandler(BaseHandler):
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yield self._delete_association(room_alias)
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@defer.inlineCallbacks
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def _delete_association(self, room_alias):
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def _delete_association(self, room_alias: RoomAlias):
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if not self.hs.is_mine(room_alias):
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raise SynapseError(400, "Room alias must be local")
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@ -217,7 +228,7 @@ class DirectoryHandler(BaseHandler):
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return room_id
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@defer.inlineCallbacks
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def get_association(self, room_alias):
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def get_association(self, room_alias: RoomAlias):
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room_id = None
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if self.hs.is_mine(room_alias):
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result = yield self.get_association_from_room_alias(room_alias)
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@ -282,7 +293,9 @@ class DirectoryHandler(BaseHandler):
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)
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@defer.inlineCallbacks
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def _update_canonical_alias(self, requester, user_id, room_id, room_alias):
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def _update_canonical_alias(
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self, requester: Requester, user_id: str, room_id: str, room_alias: RoomAlias
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):
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"""
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Send an updated canonical alias event if the removed alias was set as
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the canonical alias or listed in the alt_aliases field.
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@ -331,7 +344,7 @@ class DirectoryHandler(BaseHandler):
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)
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@defer.inlineCallbacks
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def get_association_from_room_alias(self, room_alias):
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def get_association_from_room_alias(self, room_alias: RoomAlias):
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result = yield self.store.get_association_from_room_alias(room_alias)
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if not result:
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# Query AS to see if it exists
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@ -339,7 +352,7 @@ class DirectoryHandler(BaseHandler):
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result = yield as_handler.query_room_alias_exists(room_alias)
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return result
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def can_modify_alias(self, alias, user_id=None):
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def can_modify_alias(self, alias: RoomAlias, user_id: Optional[str] = None):
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# Any application service "interested" in an alias they are regexing on
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# can modify the alias.
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# Users can only modify the alias if ALL the interested services have
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@ -360,22 +373,42 @@ class DirectoryHandler(BaseHandler):
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return defer.succeed(True)
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@defer.inlineCallbacks
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def _user_can_delete_alias(self, alias, user_id):
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def _user_can_delete_alias(self, alias: RoomAlias, user_id: str):
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"""Determine whether a user can delete an alias.
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One of the following must be true:
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1. The user created the alias.
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2. The user is a server administrator.
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3. The user has a power-level sufficient to send a canonical alias event
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for the current room.
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"""
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creator = yield self.store.get_room_alias_creator(alias.to_string())
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if creator is not None and creator == user_id:
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return True
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is_admin = yield self.auth.is_server_admin(UserID.from_string(user_id))
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return is_admin
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# Resolve the alias to the corresponding room.
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room_mapping = yield self.get_association(alias)
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room_id = room_mapping["room_id"]
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if not room_id:
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return False
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res = yield self.auth.check_can_change_room_list(
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room_id, UserID.from_string(user_id)
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)
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return res
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@defer.inlineCallbacks
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def edit_published_room_list(self, requester, room_id, visibility):
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def edit_published_room_list(
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self, requester: Requester, room_id: str, visibility: str
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):
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"""Edit the entry of the room in the published room list.
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requester
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room_id (str)
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visibility (str): "public" or "private"
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room_id
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visibility: "public" or "private"
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"""
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user_id = requester.user.to_string()
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@ -400,7 +433,15 @@ class DirectoryHandler(BaseHandler):
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if room is None:
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raise SynapseError(400, "Unknown room")
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yield self.auth.check_can_change_room_list(room_id, requester.user)
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can_change_room_list = yield self.auth.check_can_change_room_list(
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room_id, requester.user
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)
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if not can_change_room_list:
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raise AuthError(
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403,
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"This server requires you to be a moderator in the room to"
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" edit its room list entry",
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)
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making_public = visibility == "public"
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if making_public:
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@ -421,16 +462,16 @@ class DirectoryHandler(BaseHandler):
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@defer.inlineCallbacks
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def edit_published_appservice_room_list(
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self, appservice_id, network_id, room_id, visibility
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self, appservice_id: str, network_id: str, room_id: str, visibility: str
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):
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"""Add or remove a room from the appservice/network specific public
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room list.
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Args:
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appservice_id (str): ID of the appservice that owns the list
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network_id (str): The ID of the network the list is associated with
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room_id (str)
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visibility (str): either "public" or "private"
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appservice_id: ID of the appservice that owns the list
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network_id: The ID of the network the list is associated with
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room_id
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visibility: either "public" or "private"
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"""
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if visibility not in ["public", "private"]:
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raise SynapseError(400, "Invalid visibility setting")
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@ -18,6 +18,7 @@ from mock import Mock
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from twisted.internet import defer
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import synapse
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import synapse.api.errors
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from synapse.api.constants import EventTypes
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from synapse.config.room_directory import RoomDirectoryConfig
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@ -87,40 +88,6 @@ class DirectoryTestCase(unittest.HomeserverTestCase):
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ignore_backoff=True,
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)
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def test_delete_alias_not_allowed(self):
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"""Removing an alias should be denied if a user does not have the proper permissions."""
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room_id = "!8765qwer:test"
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self.get_success(
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self.store.create_room_alias_association(self.my_room, room_id, ["test"])
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)
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self.get_failure(
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self.handler.delete_association(
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create_requester("@user:test"), self.my_room
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),
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synapse.api.errors.AuthError,
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)
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def test_delete_alias(self):
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"""Removing an alias should work when a user does has the proper permissions."""
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room_id = "!8765qwer:test"
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user_id = "@user:test"
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self.get_success(
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self.store.create_room_alias_association(
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self.my_room, room_id, ["test"], user_id
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)
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)
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result = self.get_success(
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self.handler.delete_association(create_requester(user_id), self.my_room)
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)
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self.assertEquals(room_id, result)
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# The alias should not be found.
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self.get_failure(
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self.handler.get_association(self.my_room), synapse.api.errors.SynapseError
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)
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def test_incoming_fed_query(self):
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self.get_success(
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self.store.create_room_alias_association(
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@ -135,6 +102,119 @@ class DirectoryTestCase(unittest.HomeserverTestCase):
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self.assertEquals({"room_id": "!8765asdf:test", "servers": ["test"]}, response)
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class TestDeleteAlias(unittest.HomeserverTestCase):
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servlets = [
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synapse.rest.admin.register_servlets,
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login.register_servlets,
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room.register_servlets,
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directory.register_servlets,
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]
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def prepare(self, reactor, clock, hs):
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self.store = hs.get_datastore()
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self.handler = hs.get_handlers().directory_handler
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self.state_handler = hs.get_state_handler()
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# Create user
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self.admin_user = self.register_user("admin", "pass", admin=True)
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self.admin_user_tok = self.login("admin", "pass")
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# Create a test room
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self.room_id = self.helper.create_room_as(
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self.admin_user, tok=self.admin_user_tok
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)
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self.test_alias = "#test:test"
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self.room_alias = RoomAlias.from_string(self.test_alias)
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# Create a test user.
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self.test_user = self.register_user("user", "pass", admin=False)
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self.test_user_tok = self.login("user", "pass")
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self.helper.join(room=self.room_id, user=self.test_user, tok=self.test_user_tok)
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def _create_alias(self, user):
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# Create a new alias to this room.
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self.get_success(
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self.store.create_room_alias_association(
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self.room_alias, self.room_id, ["test"], user
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)
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)
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def test_delete_alias_not_allowed(self):
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"""A user that doesn't meet the expected guidelines cannot delete an alias."""
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self._create_alias(self.admin_user)
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self.get_failure(
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self.handler.delete_association(
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create_requester(self.test_user), self.room_alias
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),
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synapse.api.errors.AuthError,
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)
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def test_delete_alias_creator(self):
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"""An alias creator can delete their own alias."""
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# Create an alias from a different user.
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self._create_alias(self.test_user)
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# Delete the user's alias.
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result = self.get_success(
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self.handler.delete_association(
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create_requester(self.test_user), self.room_alias
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)
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)
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self.assertEquals(self.room_id, result)
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# Confirm the alias is gone.
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self.get_failure(
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self.handler.get_association(self.room_alias),
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synapse.api.errors.SynapseError,
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)
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def test_delete_alias_admin(self):
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"""A server admin can delete an alias created by another user."""
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# Create an alias from a different user.
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self._create_alias(self.test_user)
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# Delete the user's alias as the admin.
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result = self.get_success(
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self.handler.delete_association(
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create_requester(self.admin_user), self.room_alias
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)
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)
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self.assertEquals(self.room_id, result)
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# Confirm the alias is gone.
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self.get_failure(
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self.handler.get_association(self.room_alias),
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synapse.api.errors.SynapseError,
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)
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def test_delete_alias_sufficient_power(self):
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"""A user with a sufficient power level should be able to delete an alias."""
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self._create_alias(self.admin_user)
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# Increase the user's power level.
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self.helper.send_state(
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self.room_id,
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"m.room.power_levels",
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{"users": {self.test_user: 100}},
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tok=self.admin_user_tok,
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)
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# They can now delete the alias.
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result = self.get_success(
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self.handler.delete_association(
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create_requester(self.test_user), self.room_alias
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)
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)
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self.assertEquals(self.room_id, result)
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# Confirm the alias is gone.
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self.get_failure(
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self.handler.get_association(self.room_alias),
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synapse.api.errors.SynapseError,
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)
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class CanonicalAliasTestCase(unittest.HomeserverTestCase):
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"""Test modifications of the canonical alias when delete aliases.
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"""
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