diff options
Diffstat (limited to '')
| -rw-r--r-- | synapse/handlers/deactivate_account.py | 7 | ||||
| -rw-r--r-- | synapse/handlers/federation.py | 13 | ||||
| -rw-r--r-- | synapse/rest/client/v1/admin.py | 4 | ||||
| -rw-r--r-- | synapse/rest/client/v2_alpha/account.py | 13 | ||||
| -rw-r--r-- | synapse/storage/__init__.py | 2 | ||||
| -rw-r--r-- | synapse/storage/schema/delta/50/erasure_store.sql | 21 | ||||
| -rw-r--r-- | synapse/storage/user_erasure_store.py | 103 | ||||
| -rw-r--r-- | synapse/visibility.py | 77 |
8 files changed, 214 insertions, 26 deletions
diff --git a/synapse/handlers/deactivate_account.py b/synapse/handlers/deactivate_account.py index 8ec5ba2012..404b662469 100644 --- a/synapse/handlers/deactivate_account.py +++ b/synapse/handlers/deactivate_account.py @@ -42,7 +42,7 @@ class DeactivateAccountHandler(BaseHandler): reactor.callWhenRunning(self._start_user_parting) @defer.inlineCallbacks - def deactivate_account(self, user_id): + def deactivate_account(self, user_id, erase_data): """Deactivate a user's account Args: @@ -92,6 +92,11 @@ class DeactivateAccountHandler(BaseHandler): # 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() diff --git a/synapse/handlers/federation.py b/synapse/handlers/federation.py index 2571758284..1ca56c2c97 100644 --- a/synapse/handlers/federation.py +++ b/synapse/handlers/federation.py @@ -495,7 +495,20 @@ class FederationHandler(BaseHandler): for e_id, key_to_eid in event_to_state_ids.iteritems() } + erased_senders = yield self.store.are_users_erased( + e.sender for e in events, + ) + def redact_disallowed(event, state): + # if the sender has been gdpr17ed, always return a redacted + # copy of the event. + if erased_senders[event.sender]: + logger.info( + "Sender of %s has been erased, redacting", + event.event_id, + ) + return prune_event(event) + if not state: return event diff --git a/synapse/rest/client/v1/admin.py b/synapse/rest/client/v1/admin.py index b8665a45eb..ddaedb2a8c 100644 --- a/synapse/rest/client/v1/admin.py +++ b/synapse/rest/client/v1/admin.py @@ -254,7 +254,9 @@ class DeactivateAccountRestServlet(ClientV1RestServlet): if not is_admin: raise AuthError(403, "You are not a server admin") - yield self._deactivate_account_handler.deactivate_account(target_user_id) + yield self._deactivate_account_handler.deactivate_account( + target_user_id, False, + ) defer.returnValue((200, {})) diff --git a/synapse/rest/client/v2_alpha/account.py b/synapse/rest/client/v2_alpha/account.py index e1281cfbb6..80dbc3c92e 100644 --- a/synapse/rest/client/v2_alpha/account.py +++ b/synapse/rest/client/v2_alpha/account.py @@ -1,6 +1,7 @@ # -*- coding: utf-8 -*- # Copyright 2015, 2016 OpenMarket Ltd # Copyright 2017 Vector Creations Ltd +# Copyright 2018 New Vector Ltd # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. @@ -15,6 +16,7 @@ # limitations under the License. import logging +from six.moves import http_client from twisted.internet import defer from synapse.api.auth import has_access_token @@ -186,13 +188,20 @@ class DeactivateAccountRestServlet(RestServlet): @defer.inlineCallbacks def on_POST(self, request): body = parse_json_object_from_request(request) + erase = body.get("erase", False) + if not isinstance(erase, bool): + raise SynapseError( + http_client.BAD_REQUEST, + "Param 'erase' must be a boolean, if given", + Codes.BAD_JSON, + ) requester = yield self.auth.get_user_by_req(request) # allow ASes to dectivate their own users if requester.app_service: yield self._deactivate_account_handler.deactivate_account( - requester.user.to_string() + requester.user.to_string(), erase, ) defer.returnValue((200, {})) @@ -200,7 +209,7 @@ class DeactivateAccountRestServlet(RestServlet): requester, body, self.hs.get_ip_from_request(request), ) yield self._deactivate_account_handler.deactivate_account( - requester.user.to_string(), + requester.user.to_string(), erase, ) defer.returnValue((200, {})) diff --git a/synapse/storage/__init__.py b/synapse/storage/__init__.py index 979fa22438..e843b702b9 100644 --- a/synapse/storage/__init__.py +++ b/synapse/storage/__init__.py @@ -20,6 +20,7 @@ import time import logging from synapse.storage.devices import DeviceStore +from synapse.storage.user_erasure_store import UserErasureStore from .appservice import ( ApplicationServiceStore, ApplicationServiceTransactionStore ) @@ -88,6 +89,7 @@ class DataStore(RoomMemberStore, RoomStore, DeviceInboxStore, UserDirectoryStore, GroupServerStore, + UserErasureStore, ): def __init__(self, db_conn, hs): diff --git a/synapse/storage/schema/delta/50/erasure_store.sql b/synapse/storage/schema/delta/50/erasure_store.sql new file mode 100644 index 0000000000..5d8641a9ab --- /dev/null +++ b/synapse/storage/schema/delta/50/erasure_store.sql @@ -0,0 +1,21 @@ +/* Copyright 2018 New Vector Ltd + * + * 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. + */ + +-- a table of users who have requested that their details be erased +CREATE TABLE erased_users ( + user_id TEXT NOT NULL +); + +CREATE UNIQUE INDEX erased_users_user ON erased_users(user_id); diff --git a/synapse/storage/user_erasure_store.py b/synapse/storage/user_erasure_store.py new file mode 100644 index 0000000000..47bfc01e84 --- /dev/null +++ b/synapse/storage/user_erasure_store.py @@ -0,0 +1,103 @@ +# -*- coding: utf-8 -*- +# Copyright 2018 New Vector Ltd +# +# 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 operator + +from twisted.internet import defer + +from synapse.storage._base import SQLBaseStore +from synapse.util.caches.descriptors import cachedList, cached + + +class UserErasureWorkerStore(SQLBaseStore): + @cached() + def is_user_erased(self, user_id): + """ + Check if the given user id has requested erasure + + Args: + user_id (str): full user id to check + + Returns: + Deferred[bool]: True if the user has requested erasure + """ + return self._simple_select_onecol( + table="erased_users", + keyvalues={"user_id": user_id}, + retcol="1", + desc="is_user_erased", + ).addCallback(operator.truth) + + @cachedList( + cached_method_name="is_user_erased", + list_name="user_ids", + inlineCallbacks=True, + ) + def are_users_erased(self, user_ids): + """ + Checks which users in a list have requested erasure + + Args: + user_ids (iterable[str]): full user id to check + + Returns: + Deferred[dict[str, bool]]: + for each user, whether the user has requested erasure. + """ + # this serves the dual purpose of (a) making sure we can do len and + # iterate it multiple times, and (b) avoiding duplicates. + user_ids = tuple(set(user_ids)) + + def _get_erased_users(txn): + txn.execute( + "SELECT user_id FROM erased_users WHERE user_id IN (%s)" % ( + ",".join("?" * len(user_ids)) + ), + user_ids, + ) + return set(r[0] for r in txn) + + erased_users = yield self.runInteraction( + "are_users_erased", _get_erased_users, + ) + res = dict((u, u in erased_users) for u in user_ids) + defer.returnValue(res) + + +class UserErasureStore(UserErasureWorkerStore): + def mark_user_erased(self, user_id): + """Indicate that user_id wishes their message history to be erased. + + Args: + user_id (str): full user_id to be erased + """ + def f(txn): + # first check if they are already in the list + txn.execute( + "SELECT 1 FROM erased_users WHERE user_id = ?", + (user_id, ) + ) + if txn.fetchone(): + return + + # they are not already there: do the insert. + txn.execute( + "INSERT INTO erased_users (user_id) VALUES (?)", + (user_id, ) + ) + + self._invalidate_cache_and_stream( + txn, self.is_user_erased, (user_id,) + ) + return self.runInteraction("mark_user_erased", f) diff --git a/synapse/visibility.py b/synapse/visibility.py index aef4953c1d..65d79cf0d0 100644 --- a/synapse/visibility.py +++ b/synapse/visibility.py @@ -12,15 +12,17 @@ # 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 itertools import logging +import operator from twisted.internet import defer -from synapse.api.constants import Membership, EventTypes - -from synapse.util.logcontext import make_deferred_yieldable, preserve_fn - +from synapse.api.constants import EventTypes, Membership +from synapse.events.utils import prune_event +from synapse.util.logcontext import ( + make_deferred_yieldable, preserve_fn, +) logger = logging.getLogger(__name__) @@ -95,16 +97,27 @@ def filter_events_for_client(store, user_id, events, is_peeking=False, if ignore_dict_content else [] ) + erased_senders = yield store.are_users_erased((e.sender for e in events)) + def allowed(event): """ Args: event (synapse.events.EventBase): event to check + + Returns: + None|EventBase: + None if the user cannot see this event at all + + a redacted copy of the event if they can only see a redacted + version + + the original event if they can see it as normal. """ if not event.is_state() and event.sender in ignore_list: - return False + return None if event.event_id in always_include_ids: - return True + return event state = event_id_to_state[event.event_id] @@ -118,10 +131,6 @@ def filter_events_for_client(store, user_id, events, is_peeking=False, if visibility not in VISIBILITY_PRIORITY: visibility = "shared" - # if it was world_readable, it's easy: everyone can read it - if visibility == "world_readable": - return True - # Always allow history visibility events on boundaries. This is done # by setting the effective visibility to the least restrictive # of the old vs new. @@ -155,7 +164,7 @@ def filter_events_for_client(store, user_id, events, is_peeking=False, if membership == "leave" and ( prev_membership == "join" or prev_membership == "invite" ): - return True + return event new_priority = MEMBERSHIP_PRIORITY.index(membership) old_priority = MEMBERSHIP_PRIORITY.index(prev_membership) @@ -166,31 +175,55 @@ def filter_events_for_client(store, user_id, events, is_peeking=False, if membership is None: membership_event = state.get((EventTypes.Member, user_id), None) if membership_event: + # XXX why do we do this? + # https://github.com/matrix-org/synapse/issues/3350 if membership_event.event_id not in event_id_forgotten: membership = membership_event.membership # if the user was a member of the room at the time of the event, # they can see it. if membership == Membership.JOIN: - return True + return event + + # otherwise, it depends on the room visibility. if visibility == "joined": # we weren't a member at the time of the event, so we can't # see this event. - return False + return None elif visibility == "invited": # user can also see the event if they were *invited* at the time # of the event. - return membership == Membership.INVITE - - else: - # visibility is shared: user can also see the event if they have - # become a member since the event + return ( + event if membership == Membership.INVITE else None + ) + + elif visibility == "shared" and is_peeking: + # if the visibility is shared, users cannot see the event unless + # they have *subequently* joined the room (or were members at the + # time, of course) # # XXX: if the user has subsequently joined and then left again, # ideally we would share history up to the point they left. But - # we don't know when they left. - return not is_peeking + # we don't know when they left. We just treat it as though they + # never joined, and restrict access. + return None + + # the visibility is either shared or world_readable, and the user was + # not a member at the time. We allow it, provided the original sender + # has not requested their data to be erased, in which case, we return + # a redacted version. + if erased_senders[event.sender]: + return prune_event(event) + + return event + + # check each event: gives an iterable[None|EventBase] + filtered_events = itertools.imap(allowed, events) + + # remove the None entries + filtered_events = filter(operator.truth, filtered_events) - defer.returnValue(list(filter(allowed, events))) + # we turn it into a list before returning it. + defer.returnValue(list(filtered_events)) |