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