diff options
Diffstat (limited to 'synapse')
| -rw-r--r-- | synapse/api/auth.py | 73 | ||||
| -rw-r--r-- | synapse/federation/federation_client.py | 33 | ||||
| -rw-r--r-- | synapse/federation/federation_server.py | 31 | ||||
| -rw-r--r-- | synapse/federation/transport/client.py | 16 | ||||
| -rw-r--r-- | synapse/federation/transport/server.py | 39 | ||||
| -rw-r--r-- | synapse/handlers/_base.py | 11 | ||||
| -rw-r--r-- | synapse/handlers/federation.py | 99 | ||||
| -rw-r--r-- | synapse/handlers/room.py | 19 | ||||
| -rw-r--r-- | synapse/rest/client/v1/room.py | 20 | ||||
| -rw-r--r-- | synapse/util/third_party_invites.py | 69 |
10 files changed, 230 insertions, 180 deletions
diff --git a/synapse/api/auth.py b/synapse/api/auth.py index dfbbc5a1cd..3e891a6193 100644 --- a/synapse/api/auth.py +++ b/synapse/api/auth.py @@ -24,7 +24,6 @@ from synapse.api.constants import EventTypes, Membership, JoinRules from synapse.api.errors import AuthError, Codes, SynapseError, EventSizeError from synapse.types import RoomID, UserID, EventID from synapse.util.logutils import log_function -from synapse.util import third_party_invites from unpaddedbase64 import decode_base64 import logging @@ -318,6 +317,11 @@ class Auth(object): } ) + if Membership.INVITE == membership and "third_party_invite" in event.content: + if not self._verify_third_party_invite(event, auth_events): + raise AuthError(403, "You are not invited to this room.") + return True + if Membership.JOIN != membership: if (caller_invited and Membership.LEAVE == membership @@ -361,8 +365,7 @@ class Auth(object): pass elif join_rule == JoinRules.INVITE: if not caller_in_room and not caller_invited: - if not self._verify_third_party_invite(event, auth_events): - raise AuthError(403, "You are not invited to this room.") + raise AuthError(403, "You are not invited to this room.") else: # TODO (erikj): may_join list # TODO (erikj): private rooms @@ -390,10 +393,10 @@ class Auth(object): def _verify_third_party_invite(self, event, auth_events): """ - Validates that the join event is authorized by a previous third-party invite. + Validates that the invite event is authorized by a previous third-party invite. - Checks that the public key, and keyserver, match those in the invite, - and that the join event has a signature issued using that public key. + Checks that the public key, and keyserver, match those in the third party invite, + and that the invite event has a signature issued using that public key. Args: event: The m.room.member join event being validated. @@ -404,35 +407,28 @@ class Auth(object): True if the event fulfills the expectations of a previous third party invite event. """ - if not third_party_invites.join_has_third_party_invite(event.content): + if "third_party_invite" not in event.content: + return False + if "signed" not in event.content["third_party_invite"]: return False - join_third_party_invite = event.content["third_party_invite"] - token = join_third_party_invite["token"] + signed = event.content["third_party_invite"]["signed"] + for key in {"mxid", "token"}: + if key not in signed: + return False + + token = signed["token"] + invite_event = auth_events.get( (EventTypes.ThirdPartyInvite, token,) ) if not invite_event: - logger.info("Failing 3pid invite because no invite found for token %s", token) + return False + + if event.user_id != invite_event.user_id: return False try: - public_key = join_third_party_invite["public_key"] - key_validity_url = join_third_party_invite["key_validity_url"] - if invite_event.content["public_key"] != public_key: - logger.info( - "Failing 3pid invite because public key invite: %s != join: %s", - invite_event.content["public_key"], - public_key - ) - return False - if invite_event.content["key_validity_url"] != key_validity_url: - logger.info( - "Failing 3pid invite because key_validity_url invite: %s != join: %s", - invite_event.content["key_validity_url"], - key_validity_url - ) - return False - signed = join_third_party_invite["signed"] - if signed["mxid"] != event.user_id: + public_key = invite_event.content["public_key"] + if signed["mxid"] != event.state_key: return False if signed["token"] != token: return False @@ -445,6 +441,11 @@ class Auth(object): decode_base64(public_key) ) verify_signed_json(signed, server, verify_key) + + # We got the public key from the invite, so we know that the + # correct server signed the signed bundle. + # The caller is responsible for checking that the signing + # server has not revoked that public key. return True return False except (KeyError, SignatureVerifyException,): @@ -751,17 +752,19 @@ class Auth(object): if e_type == Membership.JOIN: if member_event and not is_public: auth_ids.append(member_event.event_id) - if third_party_invites.join_has_third_party_invite(event.content): + else: + if member_event: + auth_ids.append(member_event.event_id) + + if e_type == Membership.INVITE: + if "third_party_invite" in event.content: key = ( EventTypes.ThirdPartyInvite, event.content["third_party_invite"]["token"] ) - invite = current_state.get(key) - if invite: - auth_ids.append(invite.event_id) - else: - if member_event: - auth_ids.append(member_event.event_id) + third_party_invite = current_state.get(key) + if third_party_invite: + auth_ids.append(third_party_invite.event_id) elif member_event: if member_event.content["membership"] == Membership.JOIN: auth_ids.append(member_event.event_id) diff --git a/synapse/federation/federation_client.py b/synapse/federation/federation_client.py index 723f571284..c0c0b693b8 100644 --- a/synapse/federation/federation_client.py +++ b/synapse/federation/federation_client.py @@ -26,7 +26,6 @@ from synapse.api.errors import ( from synapse.util import unwrapFirstError from synapse.util.caches.expiringcache import ExpiringCache from synapse.util.logutils import log_function -from synapse.util import third_party_invites from synapse.events import FrozenEvent import synapse.metrics @@ -358,7 +357,7 @@ class FederationClient(FederationBase): defer.returnValue(signed_auth) @defer.inlineCallbacks - def make_membership_event(self, destinations, room_id, user_id, membership, content): + def make_membership_event(self, destinations, room_id, user_id, membership): """ Creates an m.room.member event, with context, without participating in the room. @@ -390,14 +389,9 @@ class FederationClient(FederationBase): if destination == self.server_name: continue - args = {} - if third_party_invites.join_has_third_party_invite(content): - args = third_party_invites.extract_join_keys( - content["third_party_invite"] - ) try: ret = yield self.transport_layer.make_membership_event( - destination, room_id, user_id, membership, args + destination, room_id, user_id, membership ) pdu_dict = ret["event"] @@ -704,3 +698,26 @@ class FederationClient(FederationBase): event.internal_metadata.outlier = outlier return event + + @defer.inlineCallbacks + def forward_third_party_invite(self, destinations, room_id, event_dict): + for destination in destinations: + if destination == self.server_name: + continue + + try: + yield self.transport_layer.exchange_third_party_invite( + destination=destination, + room_id=room_id, + event_dict=event_dict, + ) + defer.returnValue(None) + except CodeMessageException: + raise + except Exception as e: + logger.exception( + "Failed to send_third_party_invite via %s: %s", + destination, e.message + ) + + raise RuntimeError("Failed to send to any server.") diff --git a/synapse/federation/federation_server.py b/synapse/federation/federation_server.py index 9e2d9ee74c..7a59436a91 100644 --- a/synapse/federation/federation_server.py +++ b/synapse/federation/federation_server.py @@ -23,12 +23,10 @@ from synapse.util.logutils import log_function from synapse.events import FrozenEvent import synapse.metrics -from synapse.api.errors import FederationError, SynapseError, Codes +from synapse.api.errors import FederationError, SynapseError from synapse.crypto.event_signing import compute_event_signature -from synapse.util import third_party_invites - import simplejson as json import logging @@ -230,19 +228,8 @@ class FederationServer(FederationBase): ) @defer.inlineCallbacks - def on_make_join_request(self, room_id, user_id, query): - threepid_details = {} - if third_party_invites.has_join_keys(query): - for k in third_party_invites.JOIN_KEYS: - if not isinstance(query[k], list) or len(query[k]) != 1: - raise FederationError( - "FATAL", - Codes.MISSING_PARAM, - "key %s value %s" % (k, query[k],), - None - ) - threepid_details[k] = query[k][0] - pdu = yield self.handler.on_make_join_request(room_id, user_id, threepid_details) + def on_make_join_request(self, room_id, user_id): + pdu = yield self.handler.on_make_join_request(room_id, user_id) time_now = self._clock.time_msec() defer.returnValue({"event": pdu.get_pdu_json(time_now)}) @@ -556,3 +543,15 @@ class FederationServer(FederationBase): event.internal_metadata.outlier = outlier return event + + @defer.inlineCallbacks + def exchange_third_party_invite(self, invite): + ret = yield self.handler.exchange_third_party_invite(invite) + defer.returnValue(ret) + + @defer.inlineCallbacks + def on_exchange_third_party_invite_request(self, origin, room_id, event_dict): + ret = yield self.handler.on_exchange_third_party_invite_request( + origin, room_id, event_dict + ) + defer.returnValue(ret) diff --git a/synapse/federation/transport/client.py b/synapse/federation/transport/client.py index a81b3c4345..3d59e1c650 100644 --- a/synapse/federation/transport/client.py +++ b/synapse/federation/transport/client.py @@ -161,7 +161,7 @@ class TransportLayerClient(object): @defer.inlineCallbacks @log_function - def make_membership_event(self, destination, room_id, user_id, membership, args={}): + def make_membership_event(self, destination, room_id, user_id, membership): valid_memberships = {Membership.JOIN, Membership.LEAVE} if membership not in valid_memberships: raise RuntimeError( @@ -173,7 +173,6 @@ class TransportLayerClient(object): content = yield self.client.get_json( destination=destination, path=path, - args=args, retry_on_dns_fail=True, ) @@ -220,6 +219,19 @@ class TransportLayerClient(object): @defer.inlineCallbacks @log_function + def exchange_third_party_invite(self, destination, room_id, event_dict): + path = PREFIX + "/exchange_third_party_invite/%s" % (room_id,) + + response = yield self.client.put_json( + destination=destination, + path=path, + data=event_dict, + ) + + defer.returnValue(response) + + @defer.inlineCallbacks + @log_function def get_event_auth(self, destination, room_id, event_id): path = PREFIX + "/event_auth/%s/%s" % (room_id, event_id) diff --git a/synapse/federation/transport/server.py b/synapse/federation/transport/server.py index 8184159210..127b4da4f8 100644 --- a/synapse/federation/transport/server.py +++ b/synapse/federation/transport/server.py @@ -292,7 +292,7 @@ class FederationMakeJoinServlet(BaseFederationServlet): @defer.inlineCallbacks def on_GET(self, origin, content, query, context, user_id): - content = yield self.handler.on_make_join_request(context, user_id, query) + content = yield self.handler.on_make_join_request(context, user_id) defer.returnValue((200, content)) @@ -343,6 +343,17 @@ class FederationInviteServlet(BaseFederationServlet): defer.returnValue((200, content)) +class FederationThirdPartyInviteExchangeServlet(BaseFederationServlet): + PATH = "/exchange_third_party_invite/([^/]*)" + + @defer.inlineCallbacks + def on_PUT(self, origin, content, query, room_id): + content = yield self.handler.on_exchange_third_party_invite_request( + origin, room_id, content + ) + defer.returnValue((200, content)) + + class FederationClientKeysQueryServlet(BaseFederationServlet): PATH = "/user/keys/query" @@ -396,6 +407,30 @@ class FederationGetMissingEventsServlet(BaseFederationServlet): defer.returnValue((200, content)) +class On3pidBindServlet(BaseFederationServlet): + PATH = "/3pid/onbind" + + @defer.inlineCallbacks + def on_POST(self, request): + content_bytes = request.content.read() + content = json.loads(content_bytes) + if "invites" in content: + last_exception = None + for invite in content["invites"]: + try: + yield self.handler.exchange_third_party_invite(invite) + except Exception as e: + last_exception = e + if last_exception: + raise last_exception + defer.returnValue((200, {})) + + # Avoid doing remote HS authorization checks which are done by default by + # BaseFederationServlet. + def _wrap(self, code): + return code + + SERVLET_CLASSES = ( FederationPullServlet, FederationEventServlet, @@ -413,4 +448,6 @@ SERVLET_CLASSES = ( FederationEventAuthServlet, FederationClientKeysQueryServlet, FederationClientKeysClaimServlet, + FederationThirdPartyInviteExchangeServlet, + On3pidBindServlet, ) diff --git a/synapse/handlers/_base.py b/synapse/handlers/_base.py index a9e43052b7..eef325a94b 100644 --- a/synapse/handlers/_base.py +++ b/synapse/handlers/_base.py @@ -21,7 +21,6 @@ from synapse.api.constants import Membership, EventTypes from synapse.types import UserID, RoomAlias from synapse.util.logcontext import PreserveLoggingContext -from synapse.util import third_party_invites import logging @@ -192,16 +191,6 @@ class BaseHandler(object): ) ) - if ( - event.type == EventTypes.Member and - event.content["membership"] == Membership.JOIN and - third_party_invites.join_has_third_party_invite(event.content) - ): - yield third_party_invites.check_key_valid( - self.hs.get_simple_http_client(), - event - ) - federation_handler = self.hs.get_handlers().federation_handler if event.type == EventTypes.Member: diff --git a/synapse/handlers/federation.py b/synapse/handlers/federation.py index b2395b28d1..872051b8b9 100644 --- a/synapse/handlers/federation.py +++ b/synapse/handlers/federation.py @@ -21,6 +21,7 @@ from synapse.api.errors import ( AuthError, FederationError, StoreError, CodeMessageException, SynapseError, ) from synapse.api.constants import EventTypes, Membership, RejectedReason +from synapse.events.validator import EventValidator from synapse.util import unwrapFirstError from synapse.util.logcontext import PreserveLoggingContext from synapse.util.logutils import log_function @@ -39,7 +40,6 @@ from twisted.internet import defer import itertools import logging -from synapse.util import third_party_invites logger = logging.getLogger(__name__) @@ -58,6 +58,8 @@ class FederationHandler(BaseHandler): def __init__(self, hs): super(FederationHandler, self).__init__(hs) + self.hs = hs + self.distributor.observe( "user_joined_room", self._on_user_joined @@ -68,7 +70,6 @@ class FederationHandler(BaseHandler): self.store = hs.get_datastore() self.replication_layer = hs.get_replication_layer() self.state_handler = hs.get_state_handler() - # self.auth_handler = gs.get_auth_handler() self.server_name = hs.hostname self.keyring = hs.get_keyring() @@ -563,7 +564,7 @@ class FederationHandler(BaseHandler): @log_function @defer.inlineCallbacks - def do_invite_join(self, target_hosts, room_id, joinee, content): + def do_invite_join(self, target_hosts, room_id, joinee): """ Attempts to join the `joinee` to the room `room_id` via the server `target_host`. @@ -583,8 +584,7 @@ class FederationHandler(BaseHandler): target_hosts, room_id, joinee, - "join", - content + "join" ) self.room_queues[room_id] = [] @@ -661,16 +661,12 @@ class FederationHandler(BaseHandler): @defer.inlineCallbacks @log_function - def on_make_join_request(self, room_id, user_id, query): + def on_make_join_request(self, room_id, user_id): """ We've received a /make_join/ request, so we create a partial join event for the room and return that. We do *not* persist or process it until the other server has signed it and sent it back. """ event_content = {"membership": Membership.JOIN} - if third_party_invites.has_join_keys(query): - event_content["third_party_invite"] = ( - third_party_invites.extract_join_keys(query) - ) builder = self.event_builder_factory.new({ "type": EventTypes.Member, @@ -686,9 +682,6 @@ class FederationHandler(BaseHandler): self.auth.check(event, auth_events=context.current_state) - if third_party_invites.join_has_third_party_invite(event.content): - third_party_invites.check_key_valid(self.hs.get_simple_http_client(), event) - defer.returnValue(event) @defer.inlineCallbacks @@ -828,8 +821,7 @@ class FederationHandler(BaseHandler): target_hosts, room_id, user_id, - "leave", - {} + "leave" ) signed_event = self._sign_event(event) @@ -848,13 +840,12 @@ class FederationHandler(BaseHandler): defer.returnValue(None) @defer.inlineCallbacks - def _make_and_verify_event(self, target_hosts, room_id, user_id, membership, content): + def _make_and_verify_event(self, target_hosts, room_id, user_id, membership): origin, pdu = yield self.replication_layer.make_membership_event( target_hosts, room_id, user_id, - membership, - content + membership ) logger.debug("Got response to make_%s: %s", membership, pdu) @@ -1647,3 +1638,75 @@ class FederationHandler(BaseHandler): }, "missing": [e.event_id for e in missing_locals], }) + + @defer.inlineCallbacks + @log_function + def exchange_third_party_invite(self, invite): + sender = invite["sender"] + room_id = invite["room_id"] + + event_dict = { + "type": EventTypes.Member, + "content": { + "membership": Membership.INVITE, + "third_party_invite": invite, + }, + "room_id": room_id, + "sender": sender, + "state_key": invite["mxid"], + } + + if (yield self.auth.check_host_in_room(room_id, self.hs.hostname)): + builder = self.event_builder_factory.new(event_dict) + EventValidator().validate_new(builder) + event, context = yield self._create_new_client_event(builder=builder) + self.auth.check(event, context.current_state) + yield self._validate_keyserver(event, auth_events=context.current_state) + member_handler = self.hs.get_handlers().room_member_handler + yield member_handler.change_membership(event, context) + else: + destinations = set([x.split(":", 1)[-1] for x in (sender, room_id)]) + yield self.replication_layer.forward_third_party_invite( + destinations, + room_id, + event_dict, + ) + + @defer.inlineCallbacks + @log_function + def on_exchange_third_party_invite_request(self, origin, room_id, event_dict): + builder = self.event_builder_factory.new(event_dict) + + event, context = yield self._create_new_client_event( + builder=builder, + ) + + self.auth.check(event, auth_events=context.current_state) + yield self._validate_keyserver(event, auth_events=context.current_state) + + returned_invite = yield self.send_invite(origin, event) + # TODO: Make sure the signatures actually are correct. + event.signatures.update(returned_invite.signatures) + member_handler = self.hs.get_handlers().room_member_handler + yield member_handler.change_membership(event, context) + + @defer.inlineCallbacks + def _validate_keyserver(self, event, auth_events): + token = event.content["third_party_invite"]["signed"]["token"] + + invite_event = auth_events.get( + (EventTypes.ThirdPartyInvite, token,) + ) + + try: + response = yield self.hs.get_simple_http_client().get_json( + invite_event.content["key_validity_url"], + {"public_key": invite_event.content["public_key"]} + ) + except Exception: + raise SynapseError( + 502, + "Third party certificate could not be checked" + ) + if "valid" not in response or not response["valid"]: + raise AuthError(403, "Third party certificate was invalid") diff --git a/synapse/handlers/room.py b/synapse/handlers/room.py index 736ffe9066..8cce8d0e99 100644 --- a/synapse/handlers/room.py +++ b/synapse/handlers/room.py @@ -38,6 +38,8 @@ import string logger = logging.getLogger(__name__) +id_server_scheme = "https://" + class RoomCreationHandler(BaseHandler): @@ -488,8 +490,7 @@ class RoomMemberHandler(BaseHandler): yield handler.do_invite_join( room_hosts, room_id, - event.user_id, - event.content # FIXME To get a non-frozen dict + event.user_id ) else: logger.debug("Doing normal join") @@ -632,7 +633,7 @@ class RoomMemberHandler(BaseHandler): """ try: data = yield self.hs.get_simple_http_client().get_json( - "https://%s/_matrix/identity/api/v1/lookup" % (id_server,), + "%s%s/_matrix/identity/api/v1/lookup" % (id_server_scheme, id_server,), { "medium": medium, "address": address, @@ -655,8 +656,8 @@ class RoomMemberHandler(BaseHandler): 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( - "https://%s/_matrix/identity/api/v1/pubkey/%s" % - (server_hostname, key_name,), + "%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" % @@ -709,7 +710,9 @@ class RoomMemberHandler(BaseHandler): @defer.inlineCallbacks def _ask_id_server_for_third_party_invite( self, id_server, medium, address, room_id, sender): - is_url = "https://%s/_matrix/identity/api/v1/store-invite" % (id_server,) + is_url = "%s%s/_matrix/identity/api/v1/store-invite" % ( + id_server_scheme, id_server, + ) data = yield self.hs.get_simple_http_client().post_urlencoded_get_json( is_url, { @@ -722,8 +725,8 @@ class RoomMemberHandler(BaseHandler): # TODO: Check for success token = data["token"] public_key = data["public_key"] - key_validity_url = "https://%s/_matrix/identity/api/v1/pubkey/isvalid" % ( - id_server, + key_validity_url = "%s%s/_matrix/identity/api/v1/pubkey/isvalid" % ( + id_server_scheme, id_server, ) defer.returnValue((token, public_key, key_validity_url)) diff --git a/synapse/rest/client/v1/room.py b/synapse/rest/client/v1/room.py index afb802baec..3628298376 100644 --- a/synapse/rest/client/v1/room.py +++ b/synapse/rest/client/v1/room.py @@ -26,7 +26,6 @@ from synapse.events.utils import serialize_event import simplejson as json import logging import urllib -from synapse.util import third_party_invites logger = logging.getLogger(__name__) @@ -453,7 +452,7 @@ class RoomMembershipRestServlet(ClientV1RestServlet): # target user is you unless it is an invite state_key = user.to_string() - if membership_action == "invite" and third_party_invites.has_invite_keys(content): + if membership_action == "invite" and self._has_3pid_invite_keys(content): yield self.handlers.room_member_handler.do_3pid_invite( room_id, user, @@ -480,19 +479,10 @@ class RoomMembershipRestServlet(ClientV1RestServlet): msg_handler = self.handlers.message_handler - event_content = { - "membership": unicode(membership_action), - } - - if membership_action == "join" and third_party_invites.has_join_keys(content): - event_content["third_party_invite"] = ( - third_party_invites.extract_join_keys(content) - ) - yield msg_handler.create_and_send_event( { "type": EventTypes.Member, - "content": event_content, + "content": {"membership": unicode(membership_action)}, "room_id": room_id, "sender": user.to_string(), "state_key": state_key, @@ -503,6 +493,12 @@ class RoomMembershipRestServlet(ClientV1RestServlet): defer.returnValue((200, {})) + def _has_3pid_invite_keys(self, content): + for key in {"id_server", "medium", "address", "display_name"}: + if key not in content: + return False + return True + @defer.inlineCallbacks def on_PUT(self, request, room_id, membership_action, txn_id): try: diff --git a/synapse/util/third_party_invites.py b/synapse/util/third_party_invites.py deleted file mode 100644 index 31d186740d..0000000000 --- a/synapse/util/third_party_invites.py +++ /dev/null @@ -1,69 +0,0 @@ -# -*- coding: utf-8 -*- -# Copyright 2015 OpenMarket 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. - -from twisted.internet import defer -from synapse.api.errors import AuthError - - -INVITE_KEYS = {"id_server", "medium", "address", "display_name"} - -JOIN_KEYS = { - "token", - "public_key", - "key_validity_url", - "sender", - "signed", -} - - -def has_invite_keys(content): - for key in INVITE_KEYS: - if key not in content: - return False - return True - - -def has_join_keys(content): - for key in JOIN_KEYS: - if key not in content: - return False - return True - - -def join_has_third_party_invite(content): - if "third_party_invite" not in content: - return False - return has_join_keys(content["third_party_invite"]) - - -def extract_join_keys(src): - return { - key: value - for key, value in src.items() - if key in JOIN_KEYS - } - - -@defer.inlineCallbacks -def check_key_valid(http_client, event): - try: - response = yield http_client.get_json( - event.content["third_party_invite"]["key_validity_url"], - {"public_key": event.content["third_party_invite"]["public_key"]} - ) - except Exception: - raise AuthError(502, "Third party certificate could not be checked") - if "valid" not in response or not response["valid"]: - raise AuthError(403, "Third party certificate was invalid") |