1092 lines
40 KiB
Python
1092 lines
40 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2016 OpenMarket Ltd
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# Copyright 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 abc
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import logging
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from six.moves import http_client
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from signedjson.key import decode_verify_key_bytes
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from signedjson.sign import verify_signed_json
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from unpaddedbase64 import decode_base64
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from twisted.internet import defer
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from synapse import types
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from synapse.api.constants import EventTypes, Membership
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from synapse.api.errors import AuthError, Codes, HttpResponseException, SynapseError
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from synapse.types import RoomID, UserID
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from synapse.util.async_helpers import Linearizer
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from synapse.util.distributor import user_joined_room, user_left_room
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from ._base import BaseHandler
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logger = logging.getLogger(__name__)
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id_server_scheme = "https://"
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class RoomMemberHandler(object):
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# TODO(paul): This handler currently contains a messy conflation of
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# low-level API that works on UserID objects and so on, and REST-level
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# API that takes ID strings and returns pagination chunks. These concerns
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# ought to be separated out a lot better.
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__metaclass__ = abc.ABCMeta
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def __init__(self, hs):
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"""
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Args:
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hs (synapse.server.HomeServer):
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"""
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self.hs = hs
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self.store = hs.get_datastore()
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self.auth = hs.get_auth()
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self.state_handler = hs.get_state_handler()
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self.config = hs.config
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self.simple_http_client = hs.get_simple_http_client()
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self.federation_handler = hs.get_handlers().federation_handler
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self.directory_handler = hs.get_handlers().directory_handler
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self.registration_handler = hs.get_registration_handler()
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self.profile_handler = hs.get_profile_handler()
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self.event_creation_handler = hs.get_event_creation_handler()
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self.member_linearizer = Linearizer(name="member")
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self.clock = hs.get_clock()
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self.spam_checker = hs.get_spam_checker()
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self.third_party_event_rules = hs.get_third_party_event_rules()
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self._server_notices_mxid = self.config.server_notices_mxid
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self._enable_lookup = hs.config.enable_3pid_lookup
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self.allow_per_room_profiles = self.config.allow_per_room_profiles
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# This is only used to get at ratelimit function, and
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# maybe_kick_guest_users. It's fine there are multiple of these as
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# it doesn't store state.
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self.base_handler = BaseHandler(hs)
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@abc.abstractmethod
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def _remote_join(self, requester, remote_room_hosts, room_id, user, content):
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"""Try and join a room that this server is not in
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Args:
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requester (Requester)
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remote_room_hosts (list[str]): List of servers that can be used
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to join via.
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room_id (str): Room that we are trying to join
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user (UserID): User who is trying to join
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content (dict): A dict that should be used as the content of the
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join event.
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Returns:
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Deferred
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"""
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raise NotImplementedError()
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@abc.abstractmethod
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def _remote_reject_invite(self, remote_room_hosts, room_id, target):
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"""Attempt to reject an invite for a room this server is not in. If we
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fail to do so we locally mark the invite as rejected.
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Args:
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requester (Requester)
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remote_room_hosts (list[str]): List of servers to use to try and
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reject invite
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room_id (str)
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target (UserID): The user rejecting the invite
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Returns:
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Deferred[dict]: A dictionary to be returned to the client, may
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include event_id etc, or nothing if we locally rejected
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"""
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raise NotImplementedError()
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@abc.abstractmethod
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def _user_joined_room(self, target, room_id):
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"""Notifies distributor on master process that the user has joined the
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room.
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Args:
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target (UserID)
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room_id (str)
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Returns:
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Deferred|None
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"""
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raise NotImplementedError()
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@abc.abstractmethod
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def _user_left_room(self, target, room_id):
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"""Notifies distributor on master process that the user has left the
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room.
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Args:
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target (UserID)
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room_id (str)
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Returns:
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Deferred|None
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"""
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raise NotImplementedError()
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@defer.inlineCallbacks
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def _local_membership_update(
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self,
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requester,
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target,
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room_id,
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membership,
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prev_events_and_hashes,
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txn_id=None,
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ratelimit=True,
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content=None,
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require_consent=True,
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):
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user_id = target.to_string()
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if content is None:
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content = {}
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content["membership"] = membership
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if requester.is_guest:
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content["kind"] = "guest"
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event, context = yield self.event_creation_handler.create_event(
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requester,
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{
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"type": EventTypes.Member,
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"content": content,
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"room_id": room_id,
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"sender": requester.user.to_string(),
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"state_key": user_id,
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# For backwards compatibility:
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"membership": membership,
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},
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token_id=requester.access_token_id,
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txn_id=txn_id,
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prev_events_and_hashes=prev_events_and_hashes,
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require_consent=require_consent,
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)
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# Check if this event matches the previous membership event for the user.
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duplicate = yield self.event_creation_handler.deduplicate_state_event(
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event, context
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)
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if duplicate is not None:
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# Discard the new event since this membership change is a no-op.
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return duplicate
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yield self.event_creation_handler.handle_new_client_event(
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requester, event, context, extra_users=[target], ratelimit=ratelimit
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)
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prev_state_ids = yield context.get_prev_state_ids(self.store)
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prev_member_event_id = prev_state_ids.get((EventTypes.Member, user_id), None)
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if event.membership == Membership.JOIN:
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# Only fire user_joined_room if the user has actually joined the
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# room. Don't bother if the user is just changing their profile
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# info.
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newly_joined = True
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if prev_member_event_id:
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prev_member_event = yield self.store.get_event(prev_member_event_id)
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newly_joined = prev_member_event.membership != Membership.JOIN
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if newly_joined:
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yield self._user_joined_room(target, room_id)
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# Copy over direct message status and room tags if this is a join
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# on an upgraded room
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# Check if this is an upgraded room
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predecessor = yield self.store.get_room_predecessor(room_id)
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if predecessor:
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# It is an upgraded room. Copy over old tags
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self.copy_room_tags_and_direct_to_room(
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predecessor["room_id"], room_id, user_id
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)
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# Move over old push rules
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self.store.move_push_rules_from_room_to_room_for_user(
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predecessor["room_id"], room_id, user_id
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)
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elif event.membership == Membership.LEAVE:
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if prev_member_event_id:
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prev_member_event = yield self.store.get_event(prev_member_event_id)
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if prev_member_event.membership == Membership.JOIN:
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yield self._user_left_room(target, room_id)
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return event
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@defer.inlineCallbacks
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def copy_room_tags_and_direct_to_room(self, old_room_id, new_room_id, user_id):
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"""Copies the tags and direct room state from one room to another.
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Args:
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old_room_id (str)
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new_room_id (str)
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user_id (str)
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Returns:
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Deferred[None]
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"""
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# Retrieve user account data for predecessor room
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user_account_data, _ = yield self.store.get_account_data_for_user(user_id)
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# Copy direct message state if applicable
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direct_rooms = user_account_data.get("m.direct", {})
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# Check which key this room is under
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if isinstance(direct_rooms, dict):
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for key, room_id_list in direct_rooms.items():
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if old_room_id in room_id_list and new_room_id not in room_id_list:
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# Add new room_id to this key
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direct_rooms[key].append(new_room_id)
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# Save back to user's m.direct account data
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yield self.store.add_account_data_for_user(
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user_id, "m.direct", direct_rooms
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)
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break
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# Copy room tags if applicable
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room_tags = yield self.store.get_tags_for_room(user_id, old_room_id)
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# Copy each room tag to the new room
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for tag, tag_content in room_tags.items():
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yield self.store.add_tag_to_room(user_id, new_room_id, tag, tag_content)
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@defer.inlineCallbacks
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def update_membership(
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self,
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requester,
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target,
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room_id,
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action,
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txn_id=None,
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remote_room_hosts=None,
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third_party_signed=None,
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ratelimit=True,
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content=None,
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require_consent=True,
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):
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key = (room_id,)
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with (yield self.member_linearizer.queue(key)):
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result = yield self._update_membership(
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requester,
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target,
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room_id,
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action,
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txn_id=txn_id,
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remote_room_hosts=remote_room_hosts,
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third_party_signed=third_party_signed,
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ratelimit=ratelimit,
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content=content,
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require_consent=require_consent,
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)
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return result
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@defer.inlineCallbacks
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def _update_membership(
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self,
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requester,
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target,
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room_id,
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action,
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txn_id=None,
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remote_room_hosts=None,
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third_party_signed=None,
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ratelimit=True,
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content=None,
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require_consent=True,
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):
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content_specified = bool(content)
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if content is None:
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content = {}
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else:
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# We do a copy here as we potentially change some keys
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# later on.
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content = dict(content)
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if not self.allow_per_room_profiles:
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# Strip profile data, knowing that new profile data will be added to the
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# event's content in event_creation_handler.create_event() using the target's
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# global profile.
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content.pop("displayname", None)
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content.pop("avatar_url", None)
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effective_membership_state = action
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if action in ["kick", "unban"]:
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effective_membership_state = "leave"
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# if this is a join with a 3pid signature, we may need to turn a 3pid
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# invite into a normal invite before we can handle the join.
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if third_party_signed is not None:
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yield self.federation_handler.exchange_third_party_invite(
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third_party_signed["sender"],
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target.to_string(),
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room_id,
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third_party_signed,
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)
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if not remote_room_hosts:
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remote_room_hosts = []
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if effective_membership_state not in ("leave", "ban"):
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is_blocked = yield self.store.is_room_blocked(room_id)
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if is_blocked:
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raise SynapseError(403, "This room has been blocked on this server")
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if effective_membership_state == Membership.INVITE:
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# block any attempts to invite the server notices mxid
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if target.to_string() == self._server_notices_mxid:
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raise SynapseError(http_client.FORBIDDEN, "Cannot invite this user")
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block_invite = False
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if (
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self._server_notices_mxid is not None
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and requester.user.to_string() == self._server_notices_mxid
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):
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# allow the server notices mxid to send invites
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is_requester_admin = True
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else:
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is_requester_admin = yield self.auth.is_server_admin(requester.user)
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if not is_requester_admin:
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if self.config.block_non_admin_invites:
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logger.info(
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"Blocking invite: user is not admin and non-admin "
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"invites disabled"
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)
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block_invite = True
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if not self.spam_checker.user_may_invite(
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requester.user.to_string(), target.to_string(), room_id
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):
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logger.info("Blocking invite due to spam checker")
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block_invite = True
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if block_invite:
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raise SynapseError(403, "Invites have been disabled on this server")
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prev_events_and_hashes = yield self.store.get_prev_events_for_room(room_id)
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latest_event_ids = (event_id for (event_id, _, _) in prev_events_and_hashes)
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current_state_ids = yield self.state_handler.get_current_state_ids(
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room_id, latest_event_ids=latest_event_ids
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)
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# TODO: Refactor into dictionary of explicitly allowed transitions
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# between old and new state, with specific error messages for some
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# transitions and generic otherwise
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old_state_id = current_state_ids.get((EventTypes.Member, target.to_string()))
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if old_state_id:
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old_state = yield self.store.get_event(old_state_id, allow_none=True)
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old_membership = old_state.content.get("membership") if old_state else None
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if action == "unban" and old_membership != "ban":
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raise SynapseError(
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403,
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"Cannot unban user who was not banned"
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" (membership=%s)" % old_membership,
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errcode=Codes.BAD_STATE,
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)
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if old_membership == "ban" and action != "unban":
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raise SynapseError(
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403,
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"Cannot %s user who was banned" % (action,),
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errcode=Codes.BAD_STATE,
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)
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if old_state:
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same_content = content == old_state.content
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same_membership = old_membership == effective_membership_state
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same_sender = requester.user.to_string() == old_state.sender
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if same_sender and same_membership and same_content:
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return old_state
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if old_membership in ["ban", "leave"] and action == "kick":
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raise AuthError(403, "The target user is not in the room")
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# we don't allow people to reject invites to the server notice
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# room, but they can leave it once they are joined.
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if (
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old_membership == Membership.INVITE
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and effective_membership_state == Membership.LEAVE
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):
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is_blocked = yield self._is_server_notice_room(room_id)
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if is_blocked:
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raise SynapseError(
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http_client.FORBIDDEN,
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"You cannot reject this invite",
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errcode=Codes.CANNOT_LEAVE_SERVER_NOTICE_ROOM,
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)
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else:
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if action == "kick":
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raise AuthError(403, "The target user is not in the room")
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is_host_in_room = yield self._is_host_in_room(current_state_ids)
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if effective_membership_state == Membership.JOIN:
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if requester.is_guest:
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guest_can_join = yield self._can_guest_join(current_state_ids)
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if not guest_can_join:
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# This should be an auth check, but guests are a local concept,
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# so don't really fit into the general auth process.
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raise AuthError(403, "Guest access not allowed")
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if not is_host_in_room:
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inviter = yield self._get_inviter(target.to_string(), room_id)
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if inviter and not self.hs.is_mine(inviter):
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remote_room_hosts.append(inviter.domain)
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content["membership"] = Membership.JOIN
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profile = self.profile_handler
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if not content_specified:
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content["displayname"] = yield profile.get_displayname(target)
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content["avatar_url"] = yield profile.get_avatar_url(target)
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if requester.is_guest:
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content["kind"] = "guest"
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ret = yield self._remote_join(
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requester, remote_room_hosts, room_id, target, content
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)
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return ret
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elif effective_membership_state == Membership.LEAVE:
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if not is_host_in_room:
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# perhaps we've been invited
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inviter = yield self._get_inviter(target.to_string(), room_id)
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if not inviter:
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raise SynapseError(404, "Not a known room")
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if self.hs.is_mine(inviter):
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# the inviter was on our server, but has now left. Carry on
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# with the normal rejection codepath.
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#
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# This is a bit of a hack, because the room might still be
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# active on other servers.
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pass
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else:
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# send the rejection to the inviter's HS.
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remote_room_hosts = remote_room_hosts + [inviter.domain]
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res = yield self._remote_reject_invite(
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requester, remote_room_hosts, room_id, target
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)
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return res
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res = yield self._local_membership_update(
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requester=requester,
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target=target,
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room_id=room_id,
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membership=effective_membership_state,
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txn_id=txn_id,
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ratelimit=ratelimit,
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prev_events_and_hashes=prev_events_and_hashes,
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content=content,
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require_consent=require_consent,
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)
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return res
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|
|
@defer.inlineCallbacks
|
|
def send_membership_event(
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self, requester, event, context, remote_room_hosts=None, ratelimit=True
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):
|
|
"""
|
|
Change the membership status of a user in a room.
|
|
|
|
Args:
|
|
requester (Requester): The local user who requested the membership
|
|
event. If None, certain checks, like whether this homeserver can
|
|
act as the sender, will be skipped.
|
|
event (SynapseEvent): The membership event.
|
|
context: The context of the event.
|
|
is_guest (bool): Whether the sender is a guest.
|
|
room_hosts ([str]): Homeservers which are likely to already be in
|
|
the room, and could be danced with in order to join this
|
|
homeserver for the first time.
|
|
ratelimit (bool): Whether to rate limit this request.
|
|
Raises:
|
|
SynapseError if there was a problem changing the membership.
|
|
"""
|
|
remote_room_hosts = remote_room_hosts or []
|
|
|
|
target_user = UserID.from_string(event.state_key)
|
|
room_id = event.room_id
|
|
|
|
if requester is not None:
|
|
sender = UserID.from_string(event.sender)
|
|
assert (
|
|
sender == requester.user
|
|
), "Sender (%s) must be same as requester (%s)" % (sender, requester.user)
|
|
assert self.hs.is_mine(sender), "Sender must be our own: %s" % (sender,)
|
|
else:
|
|
requester = types.create_requester(target_user)
|
|
|
|
prev_event = yield self.event_creation_handler.deduplicate_state_event(
|
|
event, context
|
|
)
|
|
if prev_event is not None:
|
|
return
|
|
|
|
prev_state_ids = yield context.get_prev_state_ids(self.store)
|
|
if event.membership == Membership.JOIN:
|
|
if requester.is_guest:
|
|
guest_can_join = yield self._can_guest_join(prev_state_ids)
|
|
if not guest_can_join:
|
|
# This should be an auth check, but guests are a local concept,
|
|
# so don't really fit into the general auth process.
|
|
raise AuthError(403, "Guest access not allowed")
|
|
|
|
if event.membership not in (Membership.LEAVE, Membership.BAN):
|
|
is_blocked = yield self.store.is_room_blocked(room_id)
|
|
if is_blocked:
|
|
raise SynapseError(403, "This room has been blocked on this server")
|
|
|
|
yield self.event_creation_handler.handle_new_client_event(
|
|
requester, event, context, extra_users=[target_user], ratelimit=ratelimit
|
|
)
|
|
|
|
prev_member_event_id = prev_state_ids.get(
|
|
(EventTypes.Member, event.state_key), None
|
|
)
|
|
|
|
if event.membership == Membership.JOIN:
|
|
# Only fire user_joined_room if the user has actually joined the
|
|
# room. Don't bother if the user is just changing their profile
|
|
# info.
|
|
newly_joined = True
|
|
if prev_member_event_id:
|
|
prev_member_event = yield self.store.get_event(prev_member_event_id)
|
|
newly_joined = prev_member_event.membership != Membership.JOIN
|
|
if newly_joined:
|
|
yield self._user_joined_room(target_user, room_id)
|
|
elif event.membership == Membership.LEAVE:
|
|
if prev_member_event_id:
|
|
prev_member_event = yield self.store.get_event(prev_member_event_id)
|
|
if prev_member_event.membership == Membership.JOIN:
|
|
yield self._user_left_room(target_user, room_id)
|
|
|
|
@defer.inlineCallbacks
|
|
def _can_guest_join(self, current_state_ids):
|
|
"""
|
|
Returns whether a guest can join a room based on its current state.
|
|
"""
|
|
guest_access_id = current_state_ids.get((EventTypes.GuestAccess, ""), None)
|
|
if not guest_access_id:
|
|
return False
|
|
|
|
guest_access = yield self.store.get_event(guest_access_id)
|
|
|
|
return (
|
|
guest_access
|
|
and guest_access.content
|
|
and "guest_access" in guest_access.content
|
|
and guest_access.content["guest_access"] == "can_join"
|
|
)
|
|
|
|
@defer.inlineCallbacks
|
|
def lookup_room_alias(self, room_alias):
|
|
"""
|
|
Get the room ID associated with a room alias.
|
|
|
|
Args:
|
|
room_alias (RoomAlias): The alias to look up.
|
|
Returns:
|
|
A tuple of:
|
|
The room ID as a RoomID object.
|
|
Hosts likely to be participating in the room ([str]).
|
|
Raises:
|
|
SynapseError if room alias could not be found.
|
|
"""
|
|
directory_handler = self.directory_handler
|
|
mapping = yield directory_handler.get_association(room_alias)
|
|
|
|
if not mapping:
|
|
raise SynapseError(404, "No such room alias")
|
|
|
|
room_id = mapping["room_id"]
|
|
servers = mapping["servers"]
|
|
|
|
# put the server which owns the alias at the front of the server list.
|
|
if room_alias.domain in servers:
|
|
servers.remove(room_alias.domain)
|
|
servers.insert(0, room_alias.domain)
|
|
|
|
return (RoomID.from_string(room_id), servers)
|
|
|
|
@defer.inlineCallbacks
|
|
def _get_inviter(self, user_id, room_id):
|
|
invite = yield self.store.get_invite_for_user_in_room(
|
|
user_id=user_id, room_id=room_id
|
|
)
|
|
if invite:
|
|
return UserID.from_string(invite.sender)
|
|
|
|
@defer.inlineCallbacks
|
|
def do_3pid_invite(
|
|
self, room_id, inviter, medium, address, id_server, requester, txn_id
|
|
):
|
|
if self.config.block_non_admin_invites:
|
|
is_requester_admin = yield self.auth.is_server_admin(requester.user)
|
|
if not is_requester_admin:
|
|
raise SynapseError(
|
|
403, "Invites have been disabled on this server", Codes.FORBIDDEN
|
|
)
|
|
|
|
# We need to rate limit *before* we send out any 3PID invites, so we
|
|
# can't just rely on the standard ratelimiting of events.
|
|
yield self.base_handler.ratelimit(requester)
|
|
|
|
can_invite = yield self.third_party_event_rules.check_threepid_can_be_invited(
|
|
medium, address, room_id
|
|
)
|
|
if not can_invite:
|
|
raise SynapseError(
|
|
403,
|
|
"This third-party identifier can not be invited in this room",
|
|
Codes.FORBIDDEN,
|
|
)
|
|
|
|
invitee = yield self._lookup_3pid(id_server, medium, address)
|
|
|
|
if invitee:
|
|
yield self.update_membership(
|
|
requester, UserID.from_string(invitee), room_id, "invite", txn_id=txn_id
|
|
)
|
|
else:
|
|
yield self._make_and_store_3pid_invite(
|
|
requester, id_server, medium, address, room_id, inviter, txn_id=txn_id
|
|
)
|
|
|
|
@defer.inlineCallbacks
|
|
def _lookup_3pid(self, id_server, medium, address):
|
|
"""Looks up a 3pid in the passed identity server.
|
|
|
|
Args:
|
|
id_server (str): The server name (including port, if required)
|
|
of the identity server to use.
|
|
medium (str): The type of the third party identifier (e.g. "email").
|
|
address (str): The third party identifier (e.g. "foo@example.com").
|
|
|
|
Returns:
|
|
str: the matrix ID of the 3pid, or None if it is not recognized.
|
|
"""
|
|
if not self._enable_lookup:
|
|
raise SynapseError(
|
|
403, "Looking up third-party identifiers is denied from this server"
|
|
)
|
|
try:
|
|
data = yield self.simple_http_client.get_json(
|
|
"%s%s/_matrix/identity/api/v1/lookup" % (id_server_scheme, id_server),
|
|
{"medium": medium, "address": address},
|
|
)
|
|
|
|
if "mxid" in data:
|
|
if "signatures" not in data:
|
|
raise AuthError(401, "No signatures on 3pid binding")
|
|
yield self._verify_any_signature(data, id_server)
|
|
return data["mxid"]
|
|
|
|
except IOError as e:
|
|
logger.warn("Error from identity server lookup: %s" % (e,))
|
|
return None
|
|
|
|
@defer.inlineCallbacks
|
|
def _verify_any_signature(self, data, server_hostname):
|
|
if server_hostname not in data["signatures"]:
|
|
raise AuthError(401, "No signature from server %s" % (server_hostname,))
|
|
for key_name, signature in data["signatures"][server_hostname].items():
|
|
key_data = yield self.simple_http_client.get_json(
|
|
"%s%s/_matrix/identity/api/v1/pubkey/%s"
|
|
% (id_server_scheme, server_hostname, key_name)
|
|
)
|
|
if "public_key" not in key_data:
|
|
raise AuthError(
|
|
401, "No public key named %s from %s" % (key_name, server_hostname)
|
|
)
|
|
verify_signed_json(
|
|
data,
|
|
server_hostname,
|
|
decode_verify_key_bytes(
|
|
key_name, decode_base64(key_data["public_key"])
|
|
),
|
|
)
|
|
return
|
|
|
|
@defer.inlineCallbacks
|
|
def _make_and_store_3pid_invite(
|
|
self, requester, id_server, medium, address, room_id, user, txn_id
|
|
):
|
|
room_state = yield self.state_handler.get_current_state(room_id)
|
|
|
|
inviter_display_name = ""
|
|
inviter_avatar_url = ""
|
|
member_event = room_state.get((EventTypes.Member, user.to_string()))
|
|
if member_event:
|
|
inviter_display_name = member_event.content.get("displayname", "")
|
|
inviter_avatar_url = member_event.content.get("avatar_url", "")
|
|
|
|
# if user has no display name, default to their MXID
|
|
if not inviter_display_name:
|
|
inviter_display_name = user.to_string()
|
|
|
|
canonical_room_alias = ""
|
|
canonical_alias_event = room_state.get((EventTypes.CanonicalAlias, ""))
|
|
if canonical_alias_event:
|
|
canonical_room_alias = canonical_alias_event.content.get("alias", "")
|
|
|
|
room_name = ""
|
|
room_name_event = room_state.get((EventTypes.Name, ""))
|
|
if room_name_event:
|
|
room_name = room_name_event.content.get("name", "")
|
|
|
|
room_join_rules = ""
|
|
join_rules_event = room_state.get((EventTypes.JoinRules, ""))
|
|
if join_rules_event:
|
|
room_join_rules = join_rules_event.content.get("join_rule", "")
|
|
|
|
room_avatar_url = ""
|
|
room_avatar_event = room_state.get((EventTypes.RoomAvatar, ""))
|
|
if room_avatar_event:
|
|
room_avatar_url = room_avatar_event.content.get("url", "")
|
|
|
|
token, public_keys, fallback_public_key, display_name = (
|
|
yield self._ask_id_server_for_third_party_invite(
|
|
requester=requester,
|
|
id_server=id_server,
|
|
medium=medium,
|
|
address=address,
|
|
room_id=room_id,
|
|
inviter_user_id=user.to_string(),
|
|
room_alias=canonical_room_alias,
|
|
room_avatar_url=room_avatar_url,
|
|
room_join_rules=room_join_rules,
|
|
room_name=room_name,
|
|
inviter_display_name=inviter_display_name,
|
|
inviter_avatar_url=inviter_avatar_url,
|
|
)
|
|
)
|
|
|
|
yield self.event_creation_handler.create_and_send_nonmember_event(
|
|
requester,
|
|
{
|
|
"type": EventTypes.ThirdPartyInvite,
|
|
"content": {
|
|
"display_name": display_name,
|
|
"public_keys": public_keys,
|
|
# For backwards compatibility:
|
|
"key_validity_url": fallback_public_key["key_validity_url"],
|
|
"public_key": fallback_public_key["public_key"],
|
|
},
|
|
"room_id": room_id,
|
|
"sender": user.to_string(),
|
|
"state_key": token,
|
|
},
|
|
ratelimit=False,
|
|
txn_id=txn_id,
|
|
)
|
|
|
|
@defer.inlineCallbacks
|
|
def _ask_id_server_for_third_party_invite(
|
|
self,
|
|
requester,
|
|
id_server,
|
|
medium,
|
|
address,
|
|
room_id,
|
|
inviter_user_id,
|
|
room_alias,
|
|
room_avatar_url,
|
|
room_join_rules,
|
|
room_name,
|
|
inviter_display_name,
|
|
inviter_avatar_url,
|
|
):
|
|
"""
|
|
Asks an identity server for a third party invite.
|
|
|
|
Args:
|
|
requester (Requester)
|
|
id_server (str): hostname + optional port for the identity server.
|
|
medium (str): The literal string "email".
|
|
address (str): The third party address being invited.
|
|
room_id (str): The ID of the room to which the user is invited.
|
|
inviter_user_id (str): The user ID of the inviter.
|
|
room_alias (str): An alias for the room, for cosmetic notifications.
|
|
room_avatar_url (str): The URL of the room's avatar, for cosmetic
|
|
notifications.
|
|
room_join_rules (str): The join rules of the email (e.g. "public").
|
|
room_name (str): The m.room.name of the room.
|
|
inviter_display_name (str): The current display name of the
|
|
inviter.
|
|
inviter_avatar_url (str): The URL of the inviter's avatar.
|
|
|
|
Returns:
|
|
A deferred tuple containing:
|
|
token (str): The token which must be signed to prove authenticity.
|
|
public_keys ([{"public_key": str, "key_validity_url": str}]):
|
|
public_key is a base64-encoded ed25519 public key.
|
|
fallback_public_key: One element from public_keys.
|
|
display_name (str): A user-friendly name to represent the invited
|
|
user.
|
|
"""
|
|
|
|
is_url = "%s%s/_matrix/identity/api/v1/store-invite" % (
|
|
id_server_scheme,
|
|
id_server,
|
|
)
|
|
|
|
invite_config = {
|
|
"medium": medium,
|
|
"address": address,
|
|
"room_id": room_id,
|
|
"room_alias": room_alias,
|
|
"room_avatar_url": room_avatar_url,
|
|
"room_join_rules": room_join_rules,
|
|
"room_name": room_name,
|
|
"sender": inviter_user_id,
|
|
"sender_display_name": inviter_display_name,
|
|
"sender_avatar_url": inviter_avatar_url,
|
|
}
|
|
|
|
try:
|
|
data = yield self.simple_http_client.post_json_get_json(
|
|
is_url, invite_config
|
|
)
|
|
except HttpResponseException as e:
|
|
# Some identity servers may only support application/x-www-form-urlencoded
|
|
# types. This is especially true with old instances of Sydent, see
|
|
# https://github.com/matrix-org/sydent/pull/170
|
|
logger.info(
|
|
"Failed to POST %s with JSON, falling back to urlencoded form: %s",
|
|
is_url,
|
|
e,
|
|
)
|
|
data = yield self.simple_http_client.post_urlencoded_get_json(
|
|
is_url, invite_config
|
|
)
|
|
|
|
# TODO: Check for success
|
|
token = data["token"]
|
|
public_keys = data.get("public_keys", [])
|
|
if "public_key" in data:
|
|
fallback_public_key = {
|
|
"public_key": data["public_key"],
|
|
"key_validity_url": "%s%s/_matrix/identity/api/v1/pubkey/isvalid"
|
|
% (id_server_scheme, id_server),
|
|
}
|
|
else:
|
|
fallback_public_key = public_keys[0]
|
|
|
|
if not public_keys:
|
|
public_keys.append(fallback_public_key)
|
|
display_name = data["display_name"]
|
|
return token, public_keys, fallback_public_key, display_name
|
|
|
|
@defer.inlineCallbacks
|
|
def _is_host_in_room(self, current_state_ids):
|
|
# Have we just created the room, and is this about to be the very
|
|
# first member event?
|
|
create_event_id = current_state_ids.get(("m.room.create", ""))
|
|
if len(current_state_ids) == 1 and create_event_id:
|
|
# We can only get here if we're in the process of creating the room
|
|
return True
|
|
|
|
for etype, state_key in current_state_ids:
|
|
if etype != EventTypes.Member or not self.hs.is_mine_id(state_key):
|
|
continue
|
|
|
|
event_id = current_state_ids[(etype, state_key)]
|
|
event = yield self.store.get_event(event_id, allow_none=True)
|
|
if not event:
|
|
continue
|
|
|
|
if event.membership == Membership.JOIN:
|
|
return True
|
|
|
|
return False
|
|
|
|
@defer.inlineCallbacks
|
|
def _is_server_notice_room(self, room_id):
|
|
if self._server_notices_mxid is None:
|
|
return False
|
|
user_ids = yield self.store.get_users_in_room(room_id)
|
|
return self._server_notices_mxid in user_ids
|
|
|
|
|
|
class RoomMemberMasterHandler(RoomMemberHandler):
|
|
def __init__(self, hs):
|
|
super(RoomMemberMasterHandler, self).__init__(hs)
|
|
|
|
self.distributor = hs.get_distributor()
|
|
self.distributor.declare("user_joined_room")
|
|
self.distributor.declare("user_left_room")
|
|
|
|
@defer.inlineCallbacks
|
|
def _is_remote_room_too_complex(self, room_id, remote_room_hosts):
|
|
"""
|
|
Check if complexity of a remote room is too great.
|
|
|
|
Args:
|
|
room_id (str)
|
|
remote_room_hosts (list[str])
|
|
|
|
Returns: bool of whether the complexity is too great, or None
|
|
if unable to be fetched
|
|
"""
|
|
max_complexity = self.hs.config.limit_remote_rooms.complexity
|
|
complexity = yield self.federation_handler.get_room_complexity(
|
|
remote_room_hosts, room_id
|
|
)
|
|
|
|
if complexity:
|
|
return complexity["v1"] > max_complexity
|
|
return None
|
|
|
|
@defer.inlineCallbacks
|
|
def _is_local_room_too_complex(self, room_id):
|
|
"""
|
|
Check if the complexity of a local room is too great.
|
|
|
|
Args:
|
|
room_id (str)
|
|
|
|
Returns: bool
|
|
"""
|
|
max_complexity = self.hs.config.limit_remote_rooms.complexity
|
|
complexity = yield self.store.get_room_complexity(room_id)
|
|
|
|
return complexity["v1"] > max_complexity
|
|
|
|
@defer.inlineCallbacks
|
|
def _remote_join(self, requester, remote_room_hosts, room_id, user, content):
|
|
"""Implements RoomMemberHandler._remote_join
|
|
"""
|
|
# filter ourselves out of remote_room_hosts: do_invite_join ignores it
|
|
# and if it is the only entry we'd like to return a 404 rather than a
|
|
# 500.
|
|
remote_room_hosts = [
|
|
host for host in remote_room_hosts if host != self.hs.hostname
|
|
]
|
|
|
|
if len(remote_room_hosts) == 0:
|
|
raise SynapseError(404, "No known servers")
|
|
|
|
if self.hs.config.limit_remote_rooms.enabled:
|
|
# Fetch the room complexity
|
|
too_complex = yield self._is_remote_room_too_complex(
|
|
room_id, remote_room_hosts
|
|
)
|
|
if too_complex is True:
|
|
raise SynapseError(
|
|
code=400,
|
|
msg=self.hs.config.limit_remote_rooms.complexity_error,
|
|
errcode=Codes.RESOURCE_LIMIT_EXCEEDED,
|
|
)
|
|
|
|
# We don't do an auth check if we are doing an invite
|
|
# join dance for now, since we're kinda implicitly checking
|
|
# that we are allowed to join when we decide whether or not we
|
|
# need to do the invite/join dance.
|
|
yield self.federation_handler.do_invite_join(
|
|
remote_room_hosts, room_id, user.to_string(), content
|
|
)
|
|
yield self._user_joined_room(user, room_id)
|
|
|
|
# Check the room we just joined wasn't too large, if we didn't fetch the
|
|
# complexity of it before.
|
|
if self.hs.config.limit_remote_rooms.enabled:
|
|
if too_complex is False:
|
|
# We checked, and we're under the limit.
|
|
return
|
|
|
|
# Check again, but with the local state events
|
|
too_complex = yield self._is_local_room_too_complex(room_id)
|
|
|
|
if too_complex is False:
|
|
# We're under the limit.
|
|
return
|
|
|
|
# The room is too large. Leave.
|
|
requester = types.create_requester(user, None, False, None)
|
|
yield self.update_membership(
|
|
requester=requester, target=user, room_id=room_id, action="leave"
|
|
)
|
|
raise SynapseError(
|
|
code=400,
|
|
msg=self.hs.config.limit_remote_rooms.complexity_error,
|
|
errcode=Codes.RESOURCE_LIMIT_EXCEEDED,
|
|
)
|
|
|
|
@defer.inlineCallbacks
|
|
def _remote_reject_invite(self, requester, remote_room_hosts, room_id, target):
|
|
"""Implements RoomMemberHandler._remote_reject_invite
|
|
"""
|
|
fed_handler = self.federation_handler
|
|
try:
|
|
ret = yield fed_handler.do_remotely_reject_invite(
|
|
remote_room_hosts, room_id, target.to_string()
|
|
)
|
|
return ret
|
|
except Exception as e:
|
|
# if we were unable to reject the exception, just mark
|
|
# it as rejected on our end and plough ahead.
|
|
#
|
|
# The 'except' clause is very broad, but we need to
|
|
# capture everything from DNS failures upwards
|
|
#
|
|
logger.warn("Failed to reject invite: %s", e)
|
|
|
|
yield self.store.locally_reject_invite(target.to_string(), room_id)
|
|
return {}
|
|
|
|
def _user_joined_room(self, target, room_id):
|
|
"""Implements RoomMemberHandler._user_joined_room
|
|
"""
|
|
return user_joined_room(self.distributor, target, room_id)
|
|
|
|
def _user_left_room(self, target, room_id):
|
|
"""Implements RoomMemberHandler._user_left_room
|
|
"""
|
|
return user_left_room(self.distributor, target, room_id)
|
|
|
|
@defer.inlineCallbacks
|
|
def forget(self, user, room_id):
|
|
user_id = user.to_string()
|
|
|
|
member = yield self.state_handler.get_current_state(
|
|
room_id=room_id, event_type=EventTypes.Member, state_key=user_id
|
|
)
|
|
membership = member.membership if member else None
|
|
|
|
if membership is not None and membership not in [
|
|
Membership.LEAVE,
|
|
Membership.BAN,
|
|
]:
|
|
raise SynapseError(400, "User %s in room %s" % (user_id, room_id))
|
|
|
|
if membership:
|
|
yield self.store.forget(user_id, room_id)
|