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https://mau.dev/maunium/synapse.git
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28c98e51ff
Currently we rely on `current_state_events` to figure out what rooms a user was in and their last membership event in there. However, if the server leaves the room then the table may be cleaned up and that information is lost. So lets add a table that separately holds that information.
226 lines
8.7 KiB
Python
226 lines
8.7 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2017, 2018 New Vector Ltd
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# Copyright 2019 The Matrix.org Foundation C.I.C.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import logging
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from synapse.api.errors import SynapseError
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from synapse.metrics.background_process_metrics import run_as_background_process
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from synapse.types import UserID, create_requester
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from ._base import BaseHandler
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logger = logging.getLogger(__name__)
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class DeactivateAccountHandler(BaseHandler):
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"""Handler which deals with deactivating user accounts."""
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def __init__(self, hs):
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super(DeactivateAccountHandler, self).__init__(hs)
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self._auth_handler = hs.get_auth_handler()
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self._device_handler = hs.get_device_handler()
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self._room_member_handler = hs.get_room_member_handler()
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self._identity_handler = hs.get_handlers().identity_handler
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self.user_directory_handler = hs.get_user_directory_handler()
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# Flag that indicates whether the process to part users from rooms is running
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self._user_parter_running = False
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# Start the user parter loop so it can resume parting users from rooms where
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# it left off (if it has work left to do).
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hs.get_reactor().callWhenRunning(self._start_user_parting)
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self._account_validity_enabled = hs.config.account_validity.enabled
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async def deactivate_account(self, user_id, erase_data, id_server=None):
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"""Deactivate a user's account
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Args:
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user_id (str): ID of user to be deactivated
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erase_data (bool): whether to GDPR-erase the user's data
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id_server (str|None): Use the given identity server when unbinding
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any threepids. If None then will attempt to unbind using the
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identity server specified when binding (if known).
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Returns:
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Deferred[bool]: True if identity server supports removing
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threepids, otherwise False.
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"""
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# FIXME: Theoretically there is a race here wherein user resets
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# password using threepid.
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# delete threepids first. We remove these from the IS so if this fails,
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# leave the user still active so they can try again.
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# Ideally we would prevent password resets and then do this in the
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# background thread.
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# This will be set to false if the identity server doesn't support
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# unbinding
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identity_server_supports_unbinding = True
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# Retrieve the 3PIDs this user has bound to an identity server
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threepids = await self.store.user_get_bound_threepids(user_id)
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for threepid in threepids:
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try:
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result = await self._identity_handler.try_unbind_threepid(
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user_id,
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{
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"medium": threepid["medium"],
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"address": threepid["address"],
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"id_server": id_server,
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},
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)
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identity_server_supports_unbinding &= result
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except Exception:
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# Do we want this to be a fatal error or should we carry on?
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logger.exception("Failed to remove threepid from ID server")
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raise SynapseError(400, "Failed to remove threepid from ID server")
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await self.store.user_delete_threepid(
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user_id, threepid["medium"], threepid["address"]
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)
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# Remove all 3PIDs this user has bound to the homeserver
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await self.store.user_delete_threepids(user_id)
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# delete any devices belonging to the user, which will also
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# delete corresponding access tokens.
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await self._device_handler.delete_all_devices_for_user(user_id)
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# then delete any remaining access tokens which weren't associated with
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# a device.
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await self._auth_handler.delete_access_tokens_for_user(user_id)
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await self.store.user_set_password_hash(user_id, None)
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# Add the user to a table of users pending deactivation (ie.
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# removal from all the rooms they're a member of)
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await self.store.add_user_pending_deactivation(user_id)
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# delete from user directory
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await self.user_directory_handler.handle_user_deactivated(user_id)
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# Mark the user as erased, if they asked for that
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if erase_data:
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logger.info("Marking %s as erased", user_id)
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await self.store.mark_user_erased(user_id)
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# Now start the process that goes through that list and
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# parts users from rooms (if it isn't already running)
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self._start_user_parting()
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# Reject all pending invites for the user, so that the user doesn't show up in the
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# "invited" section of rooms' members list.
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await self._reject_pending_invites_for_user(user_id)
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# Remove all information on the user from the account_validity table.
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if self._account_validity_enabled:
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await self.store.delete_account_validity_for_user(user_id)
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# Mark the user as deactivated.
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await self.store.set_user_deactivated_status(user_id, True)
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return identity_server_supports_unbinding
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async def _reject_pending_invites_for_user(self, user_id):
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"""Reject pending invites addressed to a given user ID.
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Args:
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user_id (str): The user ID to reject pending invites for.
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"""
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user = UserID.from_string(user_id)
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pending_invites = await self.store.get_invited_rooms_for_local_user(user_id)
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for room in pending_invites:
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try:
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await self._room_member_handler.update_membership(
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create_requester(user),
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user,
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room.room_id,
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"leave",
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ratelimit=False,
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require_consent=False,
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)
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logger.info(
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"Rejected invite for deactivated user %r in room %r",
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user_id,
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room.room_id,
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)
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except Exception:
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logger.exception(
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"Failed to reject invite for user %r in room %r:"
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" ignoring and continuing",
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user_id,
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room.room_id,
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)
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def _start_user_parting(self):
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"""
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Start the process that goes through the table of users
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pending deactivation, if it isn't already running.
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Returns:
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None
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"""
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if not self._user_parter_running:
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run_as_background_process("user_parter_loop", self._user_parter_loop)
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async def _user_parter_loop(self):
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"""Loop that parts deactivated users from rooms
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Returns:
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None
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"""
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self._user_parter_running = True
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logger.info("Starting user parter")
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try:
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while True:
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user_id = await self.store.get_user_pending_deactivation()
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if user_id is None:
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break
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logger.info("User parter parting %r", user_id)
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await self._part_user(user_id)
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await self.store.del_user_pending_deactivation(user_id)
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logger.info("User parter finished parting %r", user_id)
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logger.info("User parter finished: stopping")
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finally:
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self._user_parter_running = False
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async def _part_user(self, user_id):
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"""Causes the given user_id to leave all the rooms they're joined to
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Returns:
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None
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"""
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user = UserID.from_string(user_id)
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rooms_for_user = await self.store.get_rooms_for_user(user_id)
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for room_id in rooms_for_user:
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logger.info("User parter parting %r from %r", user_id, room_id)
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try:
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await self._room_member_handler.update_membership(
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create_requester(user),
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user,
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room_id,
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"leave",
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ratelimit=False,
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require_consent=False,
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)
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except Exception:
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logger.exception(
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"Failed to part user %r from room %r: ignoring and continuing",
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user_id,
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room_id,
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)
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