From 3777fa26aaf36245168980054c4eebf96169dd13 Mon Sep 17 00:00:00 2001 From: Richard van der Hoff Date: Wed, 1 Aug 2018 15:35:29 +0100 Subject: sanity check response from make_join --- synapse/federation/federation_client.py | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) (limited to 'synapse/federation/federation_client.py') diff --git a/synapse/federation/federation_client.py b/synapse/federation/federation_client.py index 7550e11b6e..de4b813a15 100644 --- a/synapse/federation/federation_client.py +++ b/synapse/federation/federation_client.py @@ -561,7 +561,9 @@ class FederationClient(FederationBase): destination, room_id, user_id, membership ) - pdu_dict = ret["event"] + pdu_dict = ret.get("event", None) + if not isinstance(pdu_dict, dict): + raise InvalidResponseError("Bad 'event' field in response") logger.debug("Got response to make_%s: %s", membership, pdu_dict) -- cgit 1.4.1 From f900d508244b4277065d34dd9a05224fd60d5221 Mon Sep 17 00:00:00 2001 From: Richard van der Hoff Date: Mon, 6 Aug 2018 13:45:37 +0100 Subject: include known room versions in outgoing make_joins --- synapse/federation/federation_client.py | 8 +++++--- synapse/federation/transport/client.py | 5 ++++- synapse/handlers/federation.py | 13 +++++++++++-- synapse/http/matrixfederationclient.py | 7 +++++-- 4 files changed, 25 insertions(+), 8 deletions(-) (limited to 'synapse/federation/federation_client.py') diff --git a/synapse/federation/federation_client.py b/synapse/federation/federation_client.py index de4b813a15..7ec1d7a889 100644 --- a/synapse/federation/federation_client.py +++ b/synapse/federation/federation_client.py @@ -521,7 +521,7 @@ class FederationClient(FederationBase): raise RuntimeError("Failed to %s via any server", description) def make_membership_event(self, destinations, room_id, user_id, membership, - content={},): + content, params): """ Creates an m.room.member event, with context, without participating in the room. @@ -537,8 +537,10 @@ class FederationClient(FederationBase): user_id (str): The user whose membership is being evented. membership (str): The "membership" property of the event. Must be one of "join" or "leave". - content (object): Any additional data to put into the content field + content (dict): Any additional data to put into the content field of the event. + params (dict[str, str|Iterable[str]]): Query parameters to include in the + request. Return: Deferred: resolves to a tuple of (origin (str), event (object)) where origin is the remote homeserver which generated the event. @@ -558,7 +560,7 @@ class FederationClient(FederationBase): @defer.inlineCallbacks def send_request(destination): ret = yield self.transport_layer.make_membership_event( - destination, room_id, user_id, membership + destination, room_id, user_id, membership, params, ) pdu_dict = ret.get("event", None) diff --git a/synapse/federation/transport/client.py b/synapse/federation/transport/client.py index 4529d454af..b4fbe2c9d5 100644 --- a/synapse/federation/transport/client.py +++ b/synapse/federation/transport/client.py @@ -195,7 +195,7 @@ class TransportLayerClient(object): @defer.inlineCallbacks @log_function - def make_membership_event(self, destination, room_id, user_id, membership): + def make_membership_event(self, destination, room_id, user_id, membership, params): """Asks a remote server to build and sign us a membership event Note that this does not append any events to any graphs. @@ -205,6 +205,8 @@ class TransportLayerClient(object): room_id (str): room to join/leave user_id (str): user to be joined/left membership (str): one of join/leave + params (dict[str, str|Iterable[str]]): Query parameters to include in the + request. Returns: Deferred: Succeeds when we get a 2xx HTTP response. The result @@ -241,6 +243,7 @@ class TransportLayerClient(object): content = yield self.client.get_json( destination=destination, path=path, + args=params, retry_on_dns_fail=retry_on_dns_fail, timeout=20000, ignore_backoff=ignore_backoff, diff --git a/synapse/handlers/federation.py b/synapse/handlers/federation.py index 533b82c783..0dffd44e22 100644 --- a/synapse/handlers/federation.py +++ b/synapse/handlers/federation.py @@ -30,7 +30,12 @@ from unpaddedbase64 import decode_base64 from twisted.internet import defer -from synapse.api.constants import EventTypes, Membership, RejectedReason +from synapse.api.constants import ( + KNOWN_ROOM_VERSIONS, + EventTypes, + Membership, + RejectedReason, +) from synapse.api.errors import ( AuthError, CodeMessageException, @@ -922,6 +927,9 @@ class FederationHandler(BaseHandler): joinee, "join", content, + params={ + "ver": KNOWN_ROOM_VERSIONS, + }, ) # This shouldn't happen, because the RoomMemberHandler has a @@ -1187,13 +1195,14 @@ class FederationHandler(BaseHandler): @defer.inlineCallbacks def _make_and_verify_event(self, target_hosts, room_id, user_id, membership, - content={},): + content={}, params=None): origin, pdu = yield self.federation_client.make_membership_event( target_hosts, room_id, user_id, membership, content, + params=params, ) logger.debug("Got response to make_%s: %s", membership, pdu) diff --git a/synapse/http/matrixfederationclient.py b/synapse/http/matrixfederationclient.py index bf1aa29502..b3f5415aa6 100644 --- a/synapse/http/matrixfederationclient.py +++ b/synapse/http/matrixfederationclient.py @@ -439,7 +439,7 @@ class MatrixFederationHttpClient(object): defer.returnValue(json.loads(body)) @defer.inlineCallbacks - def get_json(self, destination, path, args={}, retry_on_dns_fail=True, + def get_json(self, destination, path, args=None, retry_on_dns_fail=True, timeout=None, ignore_backoff=False): """ GETs some json from the given host homeserver and path @@ -447,7 +447,7 @@ class MatrixFederationHttpClient(object): destination (str): The remote server to send the HTTP request to. path (str): The HTTP path. - args (dict): A dictionary used to create query strings, defaults to + args (dict|None): A dictionary used to create query strings, defaults to None. timeout (int): How long to try (in ms) the destination for before giving up. None indicates no timeout and that the request will @@ -702,6 +702,9 @@ def check_content_type_is_json(headers): def encode_query_args(args): + if args is None: + return b"" + encoded_args = {} for k, vs in args.items(): if isinstance(vs, string_types): -- cgit 1.4.1 From 19a17068f1bc98a1556ff618b544b5fbf57eeba0 Mon Sep 17 00:00:00 2001 From: Richard van der Hoff Date: Mon, 6 Aug 2018 15:15:19 +0100 Subject: Check m.room.create for sane room_versions --- synapse/event_auth.py | 10 +++++++++- synapse/federation/federation_client.py | 26 +++++++++++++++++++++++--- 2 files changed, 32 insertions(+), 4 deletions(-) (limited to 'synapse/federation/federation_client.py') diff --git a/synapse/event_auth.py b/synapse/event_auth.py index b32f64e729..6baeccca38 100644 --- a/synapse/event_auth.py +++ b/synapse/event_auth.py @@ -20,7 +20,7 @@ from signedjson.key import decode_verify_key_bytes from signedjson.sign import SignatureVerifyException, verify_signed_json from unpaddedbase64 import decode_base64 -from synapse.api.constants import EventTypes, JoinRules, Membership +from synapse.api.constants import KNOWN_ROOM_VERSIONS, EventTypes, JoinRules, Membership from synapse.api.errors import AuthError, EventSizeError, SynapseError from synapse.types import UserID, get_domain_from_id @@ -83,6 +83,14 @@ def check(event, auth_events, do_sig_check=True, do_size_check=True): 403, "Creation event's room_id domain does not match sender's" ) + + room_version = event.content.get("room_version", "1") + if room_version not in KNOWN_ROOM_VERSIONS: + raise AuthError( + 403, + "room appears to have unsupported version %s" % ( + room_version, + )) # FIXME logger.debug("Allowing! %s", event) return diff --git a/synapse/federation/federation_client.py b/synapse/federation/federation_client.py index 7ec1d7a889..c9f3c2d352 100644 --- a/synapse/federation/federation_client.py +++ b/synapse/federation/federation_client.py @@ -25,7 +25,7 @@ from prometheus_client import Counter from twisted.internet import defer -from synapse.api.constants import Membership +from synapse.api.constants import KNOWN_ROOM_VERSIONS, EventTypes, Membership from synapse.api.errors import ( CodeMessageException, FederationDeniedError, @@ -518,7 +518,7 @@ class FederationClient(FederationBase): description, destination, exc_info=1, ) - raise RuntimeError("Failed to %s via any server", description) + raise RuntimeError("Failed to %s via any server" % (description, )) def make_membership_event(self, destinations, room_id, user_id, membership, content, params): @@ -609,6 +609,26 @@ class FederationClient(FederationBase): Fails with a ``RuntimeError`` if no servers were reachable. """ + def check_authchain_validity(signed_auth_chain): + for e in signed_auth_chain: + if e.type == EventTypes.Create: + create_event = e + break + else: + raise InvalidResponseError( + "no %s in auth chain" % (EventTypes.Create,), + ) + + # the room version should be sane. + room_version = create_event.content.get("room_version", "1") + if room_version not in KNOWN_ROOM_VERSIONS: + # This shouldn't be possible, because the remote server should have + # rejected the join attempt during make_join. + raise InvalidResponseError( + "room appears to have unsupported version %s" % ( + room_version, + )) + @defer.inlineCallbacks def send_request(destination): time_now = self._clock.time_msec() @@ -665,7 +685,7 @@ class FederationClient(FederationBase): for s in signed_state: s.internal_metadata = copy.deepcopy(s.internal_metadata) - auth_chain.sort(key=lambda e: e.depth) + check_authchain_validity(signed_auth) defer.returnValue({ "state": signed_state, -- cgit 1.4.1