302 lines
12 KiB
Python
302 lines
12 KiB
Python
# 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 typing import TYPE_CHECKING, Optional
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from synapse.api.errors import SynapseError
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from synapse.handlers.device import DeviceHandler
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from synapse.metrics.background_process_metrics import run_as_background_process
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from synapse.types import Codes, Requester, UserID, create_requester
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if TYPE_CHECKING:
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from synapse.server import HomeServer
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logger = logging.getLogger(__name__)
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class DeactivateAccountHandler:
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"""Handler which deals with deactivating user accounts."""
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def __init__(self, hs: "HomeServer"):
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self.store = hs.get_datastores().main
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self.hs = 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_identity_handler()
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self._profile_handler = hs.get_profile_handler()
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self.user_directory_handler = hs.get_user_directory_handler()
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self._server_name = hs.hostname
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self._third_party_rules = hs.get_third_party_event_rules()
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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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self._third_party_rules = hs.get_third_party_event_rules()
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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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if hs.config.worker.run_background_tasks:
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hs.get_reactor().callWhenRunning(self._start_user_parting)
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self._account_validity_enabled = (
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hs.config.account_validity.account_validity_enabled
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)
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async def deactivate_account(
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self,
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user_id: str,
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erase_data: bool,
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requester: Requester,
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id_server: Optional[str] = None,
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by_admin: bool = False,
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) -> bool:
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"""Deactivate a user's account
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Args:
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user_id: ID of user to be deactivated
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erase_data: whether to GDPR-erase the user's data
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requester: The user attempting to make this change.
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id_server: 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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by_admin: Whether this change was made by an administrator.
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Returns:
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True if identity server supports removing threepids, otherwise False.
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"""
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# This can only be called on the main process.
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assert isinstance(self._device_handler, DeviceHandler)
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# Check if this user can be deactivated
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if not await self._third_party_rules.check_can_deactivate_user(
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user_id, by_admin
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):
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raise SynapseError(
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403, "Deactivation of this user is forbidden", Codes.FORBIDDEN
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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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# Most of the pushers will have been deleted when we logged out the
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# associated devices above, but we still need to delete pushers not
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# associated with devices, e.g. email pushers.
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await self.store.delete_all_pushers_for_user(user_id)
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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_local_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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user = UserID.from_string(user_id)
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# Remove avatar URL from this user
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await self._profile_handler.set_avatar_url(
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user, requester, "", by_admin, deactivation=True
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)
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# Remove displayname from this user
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await self._profile_handler.set_displayname(
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user, requester, "", by_admin, deactivation=True
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)
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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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# Remove account data (including ignored users and push rules).
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await self.store.purge_account_data_for_user(user_id)
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# Let modules know the user has been deactivated.
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await self._third_party_rules.on_user_deactivation_status_changed(
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user_id,
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True,
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by_admin,
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)
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return identity_server_supports_unbinding
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async def _reject_pending_invites_for_user(self, user_id: str) -> None:
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"""Reject pending invites addressed to a given user ID.
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Args:
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user_id: 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, authenticated_entity=self._server_name),
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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) -> None:
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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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"""
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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) -> None:
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"""Loop that parts deactivated users from rooms"""
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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: str) -> None:
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"""Causes the given user_id to leave all the rooms they're joined to"""
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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, authenticated_entity=self._server_name),
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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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async def activate_account(self, user_id: str) -> None:
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"""
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Activate an account that was previously deactivated.
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This marks the user as active and not erased in the database, but does
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not attempt to rejoin rooms, re-add threepids, etc.
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If enabled, the user will be re-added to the user directory.
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The user will also need a password hash set to actually login.
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Args:
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user_id: ID of user to be re-activated
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"""
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user = UserID.from_string(user_id)
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# Ensure the user is not marked as erased.
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await self.store.mark_user_not_erased(user_id)
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# Mark the user as active.
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await self.store.set_user_deactivated_status(user_id, False)
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await self._third_party_rules.on_user_deactivation_status_changed(
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user_id, False, True
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)
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# Add the user to the directory, if necessary. Note that
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# this must be done after the user is re-activated, because
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# deactivated users are excluded from the user directory.
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profile = await self.store.get_profileinfo(user.localpart)
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await self.user_directory_handler.handle_local_profile_change(user_id, profile)
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