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![Erik Johnston](/assets/img/avatar_default.png)
By default the homeserver will use the identity server used during the binding of the 3PID to unbind the 3PID. However, we need to allow clients to explicitly ask the homeserver to unbind via a particular identity server, for the case where the 3PID was bound out of band from the homeserver. Implements MSC915.
177 lines
6.8 KiB
Python
177 lines
6.8 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2017, 2018 New Vector Ltd
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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 twisted.internet import defer
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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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@defer.inlineCallbacks
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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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threepids = yield self.store.user_get_threepids(user_id)
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for threepid in threepids:
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try:
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result = yield 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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},
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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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yield self.store.user_delete_threepid(
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user_id, threepid['medium'], threepid['address'],
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)
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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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yield 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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yield self._auth_handler.delete_access_tokens_for_user(user_id)
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yield 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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yield self.store.add_user_pending_deactivation(user_id)
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# delete from user directory
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yield 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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yield 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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defer.returnValue(identity_server_supports_unbinding)
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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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@defer.inlineCallbacks
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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 = yield 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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yield self._part_user(user_id)
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yield 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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@defer.inlineCallbacks
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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 = yield 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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yield 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, room_id,
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)
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