Remove account data (including client config, push rules and ignored users) upon user deactivation. (#11621)

Co-authored-by: Patrick Cloke <clokep@users.noreply.github.com>
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reivilibre 2022-01-24 13:37:00 +00:00 committed by GitHub
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5 changed files with 299 additions and 3 deletions

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Remove account data (including client config, push rules and ignored users) upon user deactivation.

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@ -353,6 +353,11 @@ The following actions are performed when deactivating an user:
- Remove the user from the user directory
- Reject all pending invites
- Remove all account validity information related to the user
- Remove the arbitrary data store known as *account data*. For example, this includes:
- list of ignored users;
- push rules;
- secret storage keys; and
- cross-signing keys.
The following additional actions are performed during deactivation if `erase`
is set to `true`:
@ -366,7 +371,6 @@ The following actions are **NOT** performed. The list may be incomplete.
- Remove mappings of SSO IDs
- [Delete media uploaded](#delete-media-uploaded-by-a-user) by user (included avatar images)
- Delete sent and received messages
- Delete E2E cross-signing keys
- Remove the user's creation (registration) timestamp
- [Remove rate limit overrides](#override-ratelimiting-for-users)
- Remove from monthly active users

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@ -157,6 +157,9 @@ class DeactivateAccountHandler:
# Mark the user as deactivated.
await self.store.set_user_deactivated_status(user_id, True)
# Remove account data (including ignored users and push rules).
await self.store.purge_account_data_for_user(user_id)
return identity_server_supports_unbinding
async def _reject_pending_invites_for_user(self, user_id: str) -> None:

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@ -26,6 +26,7 @@ from synapse.storage.database import (
LoggingTransaction,
)
from synapse.storage.databases.main.cache import CacheInvalidationWorkerStore
from synapse.storage.databases.main.push_rule import PushRulesWorkerStore
from synapse.storage.engines import PostgresEngine
from synapse.storage.util.id_generators import (
AbstractStreamIdGenerator,
@ -44,7 +45,7 @@ if TYPE_CHECKING:
logger = logging.getLogger(__name__)
class AccountDataWorkerStore(CacheInvalidationWorkerStore):
class AccountDataWorkerStore(PushRulesWorkerStore, CacheInvalidationWorkerStore):
def __init__(
self,
database: DatabasePool,
@ -179,7 +180,7 @@ class AccountDataWorkerStore(CacheInvalidationWorkerStore):
else:
return None
@cached(num_args=2)
@cached(num_args=2, tree=True)
async def get_account_data_for_room(
self, user_id: str, room_id: str
) -> Dict[str, JsonDict]:
@ -546,6 +547,74 @@ class AccountDataWorkerStore(CacheInvalidationWorkerStore):
for ignored_user_id in previously_ignored_users ^ currently_ignored_users:
self._invalidate_cache_and_stream(txn, self.ignored_by, (ignored_user_id,))
async def purge_account_data_for_user(self, user_id: str) -> None:
"""
Removes the account data for a user.
This is intended to be used upon user deactivation and also removes any
derived information from account data (e.g. push rules and ignored users).
Args:
user_id: The user ID to remove data for.
"""
def purge_account_data_for_user_txn(txn: LoggingTransaction) -> None:
# Purge from the primary account_data tables.
self.db_pool.simple_delete_txn(
txn, table="account_data", keyvalues={"user_id": user_id}
)
self.db_pool.simple_delete_txn(
txn, table="room_account_data", keyvalues={"user_id": user_id}
)
# Purge from ignored_users where this user is the ignorer.
# N.B. We don't purge where this user is the ignoree, because that
# interferes with other users' account data.
# It's also not this user's data to delete!
self.db_pool.simple_delete_txn(
txn, table="ignored_users", keyvalues={"ignorer_user_id": user_id}
)
# Remove the push rules
self.db_pool.simple_delete_txn(
txn, table="push_rules", keyvalues={"user_name": user_id}
)
self.db_pool.simple_delete_txn(
txn, table="push_rules_enable", keyvalues={"user_name": user_id}
)
self.db_pool.simple_delete_txn(
txn, table="push_rules_stream", keyvalues={"user_id": user_id}
)
# Invalidate caches as appropriate
self._invalidate_cache_and_stream(
txn, self.get_account_data_for_room_and_type, (user_id,)
)
self._invalidate_cache_and_stream(
txn, self.get_account_data_for_user, (user_id,)
)
self._invalidate_cache_and_stream(
txn, self.get_global_account_data_by_type_for_user, (user_id,)
)
self._invalidate_cache_and_stream(
txn, self.get_account_data_for_room, (user_id,)
)
self._invalidate_cache_and_stream(
txn, self.get_push_rules_for_user, (user_id,)
)
self._invalidate_cache_and_stream(
txn, self.get_push_rules_enabled_for_user, (user_id,)
)
# This user might be contained in the ignored_by cache for other users,
# so we have to invalidate it all.
self._invalidate_all_cache_and_stream(txn, self.ignored_by)
await self.db_pool.runInteraction(
"purge_account_data_for_user_txn",
purge_account_data_for_user_txn,
)
class AccountDataStore(AccountDataWorkerStore):
pass

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@ -0,0 +1,219 @@
# Copyright 2021 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.
from http import HTTPStatus
from typing import Any, Dict
from twisted.test.proto_helpers import MemoryReactor
from synapse.api.constants import AccountDataTypes
from synapse.push.rulekinds import PRIORITY_CLASS_MAP
from synapse.rest import admin
from synapse.rest.client import account, login
from synapse.server import HomeServer
from synapse.util import Clock
from tests.unittest import HomeserverTestCase
class DeactivateAccountTestCase(HomeserverTestCase):
servlets = [
login.register_servlets,
admin.register_servlets,
account.register_servlets,
]
def prepare(self, reactor: MemoryReactor, clock: Clock, hs: HomeServer) -> None:
self._store = hs.get_datastore()
self.user = self.register_user("user", "pass")
self.token = self.login("user", "pass")
def _deactivate_my_account(self):
"""
Deactivates the account `self.user` using `self.token` and asserts
that it returns a 200 success code.
"""
req = self.get_success(
self.make_request(
"POST",
"account/deactivate",
{
"auth": {
"type": "m.login.password",
"user": self.user,
"password": "pass",
},
"erase": True,
},
access_token=self.token,
)
)
self.assertEqual(req.code, HTTPStatus.OK, req)
def test_global_account_data_deleted_upon_deactivation(self) -> None:
"""
Tests that global account data is removed upon deactivation.
"""
# Add some account data
self.get_success(
self._store.add_account_data_for_user(
self.user,
AccountDataTypes.DIRECT,
{"@someone:remote": ["!somewhere:remote"]},
)
)
# Check that we actually added some.
self.assertIsNotNone(
self.get_success(
self._store.get_global_account_data_by_type_for_user(
self.user, AccountDataTypes.DIRECT
)
),
)
# Request the deactivation of our account
self._deactivate_my_account()
# Check that the account data does not persist.
self.assertIsNone(
self.get_success(
self._store.get_global_account_data_by_type_for_user(
self.user, AccountDataTypes.DIRECT
)
),
)
def test_room_account_data_deleted_upon_deactivation(self) -> None:
"""
Tests that room account data is removed upon deactivation.
"""
room_id = "!room:test"
# Add some room account data
self.get_success(
self._store.add_account_data_to_room(
self.user,
room_id,
"m.fully_read",
{"event_id": "$aaaa:test"},
)
)
# Check that we actually added some.
self.assertIsNotNone(
self.get_success(
self._store.get_account_data_for_room_and_type(
self.user, room_id, "m.fully_read"
)
),
)
# Request the deactivation of our account
self._deactivate_my_account()
# Check that the account data does not persist.
self.assertIsNone(
self.get_success(
self._store.get_account_data_for_room_and_type(
self.user, room_id, "m.fully_read"
)
),
)
def _is_custom_rule(self, push_rule: Dict[str, Any]) -> bool:
"""
Default rules start with a dot: such as .m.rule and .im.vector.
This function returns true iff a rule is custom (not default).
"""
return "/." not in push_rule["rule_id"]
def test_push_rules_deleted_upon_account_deactivation(self) -> None:
"""
Push rules are a special case of account data.
They are stored separately but get sent to the client as account data in /sync.
This tests that deactivating a user deletes push rules along with the rest
of their account data.
"""
# Add a push rule
self.get_success(
self._store.add_push_rule(
self.user,
"personal.override.rule1",
PRIORITY_CLASS_MAP["override"],
[],
[],
)
)
# Test the rule exists
push_rules = self.get_success(self._store.get_push_rules_for_user(self.user))
# Filter out default rules; we don't care
push_rules = list(filter(self._is_custom_rule, push_rules))
# Check our rule made it
self.assertEqual(
push_rules,
[
{
"user_name": "@user:test",
"rule_id": "personal.override.rule1",
"priority_class": 5,
"priority": 0,
"conditions": [],
"actions": [],
"default": False,
}
],
push_rules,
)
# Request the deactivation of our account
self._deactivate_my_account()
push_rules = self.get_success(self._store.get_push_rules_for_user(self.user))
# Filter out default rules; we don't care
push_rules = list(filter(self._is_custom_rule, push_rules))
# Check our rule no longer exists
self.assertEqual(push_rules, [], push_rules)
def test_ignored_users_deleted_upon_deactivation(self) -> None:
"""
Ignored users are a special case of account data.
They get denormalised into the `ignored_users` table upon being stored as
account data.
Test that a user's list of ignored users is deleted upon deactivation.
"""
# Add an ignored user
self.get_success(
self._store.add_account_data_for_user(
self.user,
AccountDataTypes.IGNORED_USER_LIST,
{"ignored_users": {"@sheltie:test": {}}},
)
)
# Test the user is ignored
self.assertEqual(
self.get_success(self._store.ignored_by("@sheltie:test")), {self.user}
)
# Request the deactivation of our account
self._deactivate_my_account()
# Test the user is no longer ignored by the user that was deactivated
self.assertEqual(
self.get_success(self._store.ignored_by("@sheltie:test")), set()
)