diff options
Diffstat (limited to 'synapse/handlers/room_member.py')
| -rw-r--r-- | synapse/handlers/room_member.py | 460 |
1 files changed, 343 insertions, 117 deletions
diff --git a/synapse/handlers/room_member.py b/synapse/handlers/room_member.py index 1b8dfa8254..0d4a3f4677 100644 --- a/synapse/handlers/room_member.py +++ b/synapse/handlers/room_member.py @@ -1,5 +1,6 @@ # -*- coding: utf-8 -*- # Copyright 2016 OpenMarket 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. @@ -13,63 +14,161 @@ # See the License for the specific language governing permissions and # limitations under the License. - +import abc import logging +from six.moves import http_client + from signedjson.key import decode_verify_key_bytes from signedjson.sign import verify_signed_json -from twisted.internet import defer from unpaddedbase64 import decode_base64 +from twisted.internet import defer + +import synapse.server import synapse.types -from synapse.api.constants import ( - EventTypes, Membership, -) -from synapse.api.errors import AuthError, SynapseError, Codes -from synapse.types import UserID, RoomID +from synapse.api.constants import EventTypes, Membership +from synapse.api.errors import AuthError, Codes, SynapseError +from synapse.types import RoomID, UserID from synapse.util.async import Linearizer -from synapse.util.distributor import user_left_room, user_joined_room -from ._base import BaseHandler +from synapse.util.distributor import user_joined_room, user_left_room logger = logging.getLogger(__name__) id_server_scheme = "https://" -class RoomMemberHandler(BaseHandler): +class RoomMemberHandler(object): # TODO(paul): This handler currently contains a messy conflation of # low-level API that works on UserID objects and so on, and REST-level # API that takes ID strings and returns pagination chunks. These concerns # ought to be separated out a lot better. + __metaclass__ = abc.ABCMeta + def __init__(self, hs): - super(RoomMemberHandler, self).__init__(hs) + """ + + Args: + hs (synapse.server.HomeServer): + """ + self.hs = hs + self.store = hs.get_datastore() + self.auth = hs.get_auth() + self.state_handler = hs.get_state_handler() + self.config = hs.config + self.simple_http_client = hs.get_simple_http_client() + + self.federation_handler = hs.get_handlers().federation_handler + self.directory_handler = hs.get_handlers().directory_handler + self.registration_handler = hs.get_handlers().registration_handler + self.profile_handler = hs.get_profile_handler() + self.event_creation_hander = hs.get_event_creation_handler() self.member_linearizer = Linearizer(name="member") self.clock = hs.get_clock() + self.spam_checker = hs.get_spam_checker() + self._server_notices_mxid = self.config.server_notices_mxid - self.distributor = hs.get_distributor() - self.distributor.declare("user_joined_room") - self.distributor.declare("user_left_room") + @abc.abstractmethod + def _remote_join(self, requester, remote_room_hosts, room_id, user, content): + """Try and join a room that this server is not in + + Args: + requester (Requester) + remote_room_hosts (list[str]): List of servers that can be used + to join via. + room_id (str): Room that we are trying to join + user (UserID): User who is trying to join + content (dict): A dict that should be used as the content of the + join event. + + Returns: + Deferred + """ + raise NotImplementedError() + + @abc.abstractmethod + def _remote_reject_invite(self, remote_room_hosts, room_id, target): + """Attempt to reject an invite for a room this server is not in. If we + fail to do so we locally mark the invite as rejected. + + Args: + requester (Requester) + remote_room_hosts (list[str]): List of servers to use to try and + reject invite + room_id (str) + target (UserID): The user rejecting the invite + + Returns: + Deferred[dict]: A dictionary to be returned to the client, may + include event_id etc, or nothing if we locally rejected + """ + raise NotImplementedError() + + @abc.abstractmethod + def get_or_register_3pid_guest(self, requester, medium, address, inviter_user_id): + """Get a guest access token for a 3PID, creating a guest account if + one doesn't already exist. + + Args: + requester (Requester) + medium (str) + address (str) + inviter_user_id (str): The user ID who is trying to invite the + 3PID + + Returns: + Deferred[(str, str)]: A 2-tuple of `(user_id, access_token)` of the + 3PID guest account. + """ + raise NotImplementedError() + + @abc.abstractmethod + def _user_joined_room(self, target, room_id): + """Notifies distributor on master process that the user has joined the + room. + + Args: + target (UserID) + room_id (str) + + Returns: + Deferred|None + """ + raise NotImplementedError() + + @abc.abstractmethod + def _user_left_room(self, target, room_id): + """Notifies distributor on master process that the user has left the + room. + + Args: + target (UserID) + room_id (str) + + Returns: + Deferred|None + """ + raise NotImplementedError() @defer.inlineCallbacks def _local_membership_update( self, requester, target, room_id, membership, - prev_event_ids, + prev_events_and_hashes, txn_id=None, ratelimit=True, content=None, ): if content is None: content = {} - msg_handler = self.hs.get_handlers().message_handler content["membership"] = membership if requester.is_guest: content["kind"] = "guest" - event, context = yield msg_handler.create_event( + event, context = yield self.event_creation_hander.create_event( requester, { "type": EventTypes.Member, @@ -83,16 +182,18 @@ class RoomMemberHandler(BaseHandler): }, token_id=requester.access_token_id, txn_id=txn_id, - prev_event_ids=prev_event_ids, + prev_events_and_hashes=prev_events_and_hashes, ) # Check if this event matches the previous membership event for the user. - duplicate = yield msg_handler.deduplicate_state_event(event, context) + duplicate = yield self.event_creation_hander.deduplicate_state_event( + event, context, + ) if duplicate is not None: # Discard the new event since this membership change is a no-op. defer.returnValue(duplicate) - yield msg_handler.handle_new_client_event( + yield self.event_creation_hander.handle_new_client_event( requester, event, context, @@ -100,7 +201,9 @@ class RoomMemberHandler(BaseHandler): ratelimit=ratelimit, ) - prev_member_event_id = context.prev_state_ids.get( + prev_state_ids = yield context.get_prev_state_ids(self.store) + + prev_member_event_id = prev_state_ids.get( (EventTypes.Member, target.to_string()), None ) @@ -114,33 +217,16 @@ class RoomMemberHandler(BaseHandler): prev_member_event = yield self.store.get_event(prev_member_event_id) newly_joined = prev_member_event.membership != Membership.JOIN if newly_joined: - yield user_joined_room(self.distributor, target, room_id) + yield self._user_joined_room(target, 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: - user_left_room(self.distributor, target, room_id) + yield self._user_left_room(target, room_id) defer.returnValue(event) @defer.inlineCallbacks - def remote_join(self, remote_room_hosts, room_id, user, content): - if len(remote_room_hosts) == 0: - raise SynapseError(404, "No known servers") - - # 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.hs.get_handlers().federation_handler.do_invite_join( - remote_room_hosts, - room_id, - user.to_string(), - content, - ) - yield user_joined_room(self.distributor, user, room_id) - - @defer.inlineCallbacks def update_membership( self, requester, @@ -186,14 +272,19 @@ class RoomMemberHandler(BaseHandler): content_specified = bool(content) if content is None: content = {} + else: + # We do a copy here as we potentially change some keys + # later on. + content = dict(content) effective_membership_state = action if action in ["kick", "unban"]: effective_membership_state = "leave" + # if this is a join with a 3pid signature, we may need to turn a 3pid + # invite into a normal invite before we can handle the join. if third_party_signed is not None: - replication = self.hs.get_replication_layer() - yield replication.exchange_third_party_invite( + yield self.federation_handler.exchange_third_party_invite( third_party_signed["sender"], target.to_string(), room_id, @@ -208,7 +299,51 @@ class RoomMemberHandler(BaseHandler): if is_blocked: raise SynapseError(403, "This room has been blocked on this server") - latest_event_ids = yield self.store.get_latest_event_ids_in_room(room_id) + if effective_membership_state == Membership.INVITE: + # block any attempts to invite the server notices mxid + if target.to_string() == self._server_notices_mxid: + raise SynapseError( + http_client.FORBIDDEN, + "Cannot invite this user", + ) + + block_invite = False + + if (self._server_notices_mxid is not None and + requester.user.to_string() == self._server_notices_mxid): + # allow the server notices mxid to send invites + is_requester_admin = True + + else: + is_requester_admin = yield self.auth.is_server_admin( + requester.user, + ) + + if not is_requester_admin: + if self.config.block_non_admin_invites: + logger.info( + "Blocking invite: user is not admin and non-admin " + "invites disabled" + ) + block_invite = True + + if not self.spam_checker.user_may_invite( + requester.user.to_string(), target.to_string(), room_id, + ): + logger.info("Blocking invite due to spam checker") + block_invite = True + + if block_invite: + raise SynapseError( + 403, "Invites have been disabled on this server", + ) + + prev_events_and_hashes = yield self.store.get_prev_events_for_room( + room_id, + ) + latest_event_ids = ( + event_id for (event_id, _, _) in prev_events_and_hashes + ) current_state_ids = yield self.state_handler.get_current_state_ids( room_id, latest_event_ids=latest_event_ids, ) @@ -238,6 +373,20 @@ class RoomMemberHandler(BaseHandler): if same_sender and same_membership and same_content: defer.returnValue(old_state) + # we don't allow people to reject invites to the server notice + # room, but they can leave it once they are joined. + if ( + old_membership == Membership.INVITE and + effective_membership_state == Membership.LEAVE + ): + is_blocked = yield self._is_server_notice_room(room_id) + if is_blocked: + raise SynapseError( + http_client.FORBIDDEN, + "You cannot reject this invite", + errcode=Codes.CANNOT_LEAVE_SERVER_NOTICE_ROOM, + ) + is_host_in_room = yield self._is_host_in_room(current_state_ids) if effective_membership_state == Membership.JOIN: @@ -249,13 +398,13 @@ class RoomMemberHandler(BaseHandler): raise AuthError(403, "Guest access not allowed") if not is_host_in_room: - inviter = yield self.get_inviter(target.to_string(), room_id) + inviter = yield self._get_inviter(target.to_string(), room_id) if inviter and not self.hs.is_mine(inviter): remote_room_hosts.append(inviter.domain) content["membership"] = Membership.JOIN - profile = self.hs.get_handlers().profile_handler + profile = self.profile_handler if not content_specified: content["displayname"] = yield profile.get_displayname(target) content["avatar_url"] = yield profile.get_avatar_url(target) @@ -263,15 +412,15 @@ class RoomMemberHandler(BaseHandler): if requester.is_guest: content["kind"] = "guest" - ret = yield self.remote_join( - remote_room_hosts, room_id, target, content + ret = yield self._remote_join( + requester, remote_room_hosts, room_id, target, content ) defer.returnValue(ret) elif effective_membership_state == Membership.LEAVE: if not is_host_in_room: # perhaps we've been invited - inviter = yield self.get_inviter(target.to_string(), room_id) + inviter = yield self._get_inviter(target.to_string(), room_id) if not inviter: raise SynapseError(404, "Not a known room") @@ -285,28 +434,10 @@ class RoomMemberHandler(BaseHandler): else: # send the rejection to the inviter's HS. remote_room_hosts = remote_room_hosts + [inviter.domain] - fed_handler = self.hs.get_handlers().federation_handler - try: - ret = yield fed_handler.do_remotely_reject_invite( - remote_room_hosts, - room_id, - target.to_string(), - ) - defer.returnValue(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 - ) - - defer.returnValue({}) + res = yield self._remote_reject_invite( + requester, remote_room_hosts, room_id, target, + ) + defer.returnValue(res) res = yield self._local_membership_update( requester=requester, @@ -315,7 +446,7 @@ class RoomMemberHandler(BaseHandler): membership=effective_membership_state, txn_id=txn_id, ratelimit=ratelimit, - prev_event_ids=latest_event_ids, + prev_events_and_hashes=prev_events_and_hashes, content=content, ) defer.returnValue(res) @@ -361,14 +492,16 @@ class RoomMemberHandler(BaseHandler): else: requester = synapse.types.create_requester(target_user) - message_handler = self.hs.get_handlers().message_handler - prev_event = yield message_handler.deduplicate_state_event(event, context) + prev_event = yield self.event_creation_hander.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(context.prev_state_ids) + 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. @@ -379,7 +512,7 @@ class RoomMemberHandler(BaseHandler): if is_blocked: raise SynapseError(403, "This room has been blocked on this server") - yield message_handler.handle_new_client_event( + yield self.event_creation_hander.handle_new_client_event( requester, event, context, @@ -387,7 +520,7 @@ class RoomMemberHandler(BaseHandler): ratelimit=ratelimit, ) - prev_member_event_id = context.prev_state_ids.get( + prev_member_event_id = prev_state_ids.get( (EventTypes.Member, event.state_key), None ) @@ -401,12 +534,12 @@ class RoomMemberHandler(BaseHandler): prev_member_event = yield self.store.get_event(prev_member_event_id) newly_joined = prev_member_event.membership != Membership.JOIN if newly_joined: - yield user_joined_room(self.distributor, target_user, room_id) + 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: - user_left_room(self.distributor, target_user, room_id) + yield self._user_left_room(target_user, room_id) @defer.inlineCallbacks def _can_guest_join(self, current_state_ids): @@ -440,7 +573,7 @@ class RoomMemberHandler(BaseHandler): Raises: SynapseError if room alias could not be found. """ - directory_handler = self.hs.get_handlers().directory_handler + directory_handler = self.directory_handler mapping = yield directory_handler.get_association(room_alias) if not mapping: @@ -452,7 +585,7 @@ class RoomMemberHandler(BaseHandler): defer.returnValue((RoomID.from_string(room_id), servers)) @defer.inlineCallbacks - def get_inviter(self, user_id, room_id): + 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, @@ -471,6 +604,16 @@ class RoomMemberHandler(BaseHandler): 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, + ) + invitee = yield self._lookup_3pid( id_server, medium, address ) @@ -508,7 +651,7 @@ class RoomMemberHandler(BaseHandler): str: the matrix ID of the 3pid, or None if it is not recognized. """ try: - data = yield self.hs.get_simple_http_client().get_json( + data = yield self.simple_http_client.get_json( "%s%s/_matrix/identity/api/v1/lookup" % (id_server_scheme, id_server,), { "medium": medium, @@ -519,7 +662,7 @@ class RoomMemberHandler(BaseHandler): if "mxid" in data: if "signatures" not in data: raise AuthError(401, "No signatures on 3pid binding") - self.verify_any_signature(data, id_server) + yield self._verify_any_signature(data, id_server) defer.returnValue(data["mxid"]) except IOError as e: @@ -527,11 +670,11 @@ class RoomMemberHandler(BaseHandler): defer.returnValue(None) @defer.inlineCallbacks - def verify_any_signature(self, data, server_hostname): + 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.hs.get_simple_http_client().get_json( + key_data = yield self.simple_http_client.get_json( "%s%s/_matrix/identity/api/v1/pubkey/%s" % (id_server_scheme, server_hostname, key_name,), ) @@ -556,7 +699,7 @@ class RoomMemberHandler(BaseHandler): user, txn_id ): - room_state = yield self.hs.get_state_handler().get_current_state(room_id) + room_state = yield self.state_handler.get_current_state(room_id) inviter_display_name = "" inviter_avatar_url = "" @@ -591,6 +734,7 @@ class RoomMemberHandler(BaseHandler): 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, @@ -605,8 +749,7 @@ class RoomMemberHandler(BaseHandler): ) ) - msg_handler = self.hs.get_handlers().message_handler - yield msg_handler.create_and_send_nonmember_event( + yield self.event_creation_hander.create_and_send_nonmember_event( requester, { "type": EventTypes.ThirdPartyInvite, @@ -628,6 +771,7 @@ class RoomMemberHandler(BaseHandler): @defer.inlineCallbacks def _ask_id_server_for_third_party_invite( self, + requester, id_server, medium, address, @@ -644,6 +788,7 @@ class RoomMemberHandler(BaseHandler): 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. @@ -685,24 +830,20 @@ class RoomMemberHandler(BaseHandler): "sender_avatar_url": inviter_avatar_url, } - if self.hs.config.invite_3pid_guest: - registration_handler = self.hs.get_handlers().registration_handler - guest_access_token = yield registration_handler.guest_access_token_for( + if self.config.invite_3pid_guest: + guest_access_token, guest_user_id = yield self.get_or_register_3pid_guest( + requester=requester, medium=medium, address=address, inviter_user_id=inviter_user_id, ) - guest_user_info = yield self.hs.get_auth().get_user_by_access_token( - guest_access_token - ) - invite_config.update({ "guest_access_token": guest_access_token, - "guest_user_id": guest_user_info["user"].to_string(), + "guest_user_id": guest_user_id, }) - data = yield self.hs.get_simple_http_client().post_urlencoded_get_json( + data = yield self.simple_http_client.post_urlencoded_get_json( is_url, invite_config ) @@ -725,27 +866,6 @@ class RoomMemberHandler(BaseHandler): defer.returnValue((token, public_keys, fallback_public_key, display_name)) @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) - - @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? @@ -766,3 +886,109 @@ class RoomMemberHandler(BaseHandler): defer.returnValue(True) defer.returnValue(False) + + @defer.inlineCallbacks + def _is_server_notice_room(self, room_id): + if self._server_notices_mxid is None: + defer.returnValue(False) + user_ids = yield self.store.get_users_in_room(room_id) + defer.returnValue(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 _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") + + # 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) + + @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(), + ) + defer.returnValue(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 + ) + defer.returnValue({}) + + def get_or_register_3pid_guest(self, requester, medium, address, inviter_user_id): + """Implements RoomMemberHandler.get_or_register_3pid_guest + """ + rg = self.registration_handler + return rg.get_or_register_3pid_guest(medium, address, inviter_user_id) + + 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) |