diff options
Diffstat (limited to 'synapse/federation/federation_client.py')
| -rw-r--r-- | synapse/federation/federation_client.py | 80 |
1 files changed, 68 insertions, 12 deletions
diff --git a/synapse/federation/federation_client.py b/synapse/federation/federation_client.py index d05ed91d64..33ecabca29 100644 --- a/synapse/federation/federation_client.py +++ b/synapse/federation/federation_client.py @@ -25,14 +25,20 @@ from prometheus_client import Counter from twisted.internet import defer -from synapse.api.constants import KNOWN_ROOM_VERSIONS, EventTypes, Membership +from synapse.api.constants import ( + KNOWN_ROOM_VERSIONS, + EventTypes, + Membership, + RoomVersions, +) from synapse.api.errors import ( CodeMessageException, FederationDeniedError, HttpResponseException, SynapseError, ) -from synapse.events import builder +from synapse.crypto.event_signing import add_hashes_and_signatures +from synapse.events import room_version_to_event_format from synapse.federation.federation_base import FederationBase, event_from_pdu_json from synapse.util import logcontext, unwrapFirstError from synapse.util.caches.expiringcache import ExpiringCache @@ -66,6 +72,8 @@ class FederationClient(FederationBase): self.state = hs.get_state_handler() self.transport_layer = hs.get_federation_transport_client() + self.event_builder_factory = hs.get_event_builder_factory() + self._get_pdu_cache = ExpiringCache( cache_name="get_pdu_cache", clock=self._clock, @@ -202,7 +210,8 @@ class FederationClient(FederationBase): @defer.inlineCallbacks @log_function - def get_pdu(self, destinations, event_id, outlier=False, timeout=None): + def get_pdu(self, destinations, event_id, room_version, outlier=False, + timeout=None): """Requests the PDU with given origin and ID from the remote home servers. @@ -212,6 +221,7 @@ class FederationClient(FederationBase): Args: destinations (list): Which home servers to query event_id (str): event to fetch + room_version (str): version of the room outlier (bool): Indicates whether the PDU is an `outlier`, i.e. if it's from an arbitary point in the context as opposed to part of the current block of PDUs. Defaults to `False` @@ -352,10 +362,13 @@ class FederationClient(FederationBase): ev.event_id for ev in itertools.chain(pdus, auth_chain) ]) + room_version = yield self.store.get_room_version(room_id) + signed_pdus = yield self._check_sigs_and_hash_and_fetch( destination, [p for p in pdus if p.event_id not in seen_events], - outlier=True + outlier=True, + room_version=room_version, ) signed_pdus.extend( seen_events[p.event_id] for p in pdus if p.event_id in seen_events @@ -364,7 +377,8 @@ class FederationClient(FederationBase): signed_auth = yield self._check_sigs_and_hash_and_fetch( destination, [p for p in auth_chain if p.event_id not in seen_events], - outlier=True + outlier=True, + room_version=room_version, ) signed_auth.extend( seen_events[p.event_id] for p in auth_chain if p.event_id in seen_events @@ -411,6 +425,8 @@ class FederationClient(FederationBase): random.shuffle(srvs) return srvs + room_version = yield self.store.get_room_version(room_id) + batch_size = 20 missing_events = list(missing_events) for i in range(0, len(missing_events), batch_size): @@ -421,6 +437,7 @@ class FederationClient(FederationBase): self.get_pdu, destinations=random_server_list(), event_id=e_id, + room_version=room_version, ) for e_id in batch ] @@ -450,8 +467,11 @@ class FederationClient(FederationBase): for p in res["auth_chain"] ] + room_version = yield self.store.get_room_version(room_id) + signed_auth = yield self._check_sigs_and_hash_and_fetch( - destination, auth_chain, outlier=True + destination, auth_chain, + outlier=True, room_version=room_version, ) signed_auth.sort(key=lambda e: e.depth) @@ -522,6 +542,8 @@ class FederationClient(FederationBase): Does so by asking one of the already participating servers to create an event with proper context. + Returns a fully signed and hashed event. + Note that this does not append any events to any graphs. Args: @@ -536,8 +558,10 @@ class FederationClient(FederationBase): 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. + Deferred[tuple[str, FrozenEvent, int]]: resolves to a tuple of + `(origin, event, event_format)` where origin is the remote + homeserver which generated the event, and event_format is one of + `synapse.api.constants.EventFormatVersions`. Fails with a ``SynapseError`` if the chosen remote server returns a 300/400 code. @@ -557,6 +581,11 @@ class FederationClient(FederationBase): destination, room_id, user_id, membership, params, ) + # Note: If not supplied, the room version may be either v1 or v2, + # however either way the event format version will be v1. + room_version = ret.get("room_version", RoomVersions.V1) + event_format = room_version_to_event_format(room_version) + pdu_dict = ret.get("event", None) if not isinstance(pdu_dict, dict): raise InvalidResponseError("Bad 'event' field in response") @@ -571,10 +600,21 @@ class FederationClient(FederationBase): if "prev_state" not in pdu_dict: pdu_dict["prev_state"] = [] - ev = builder.EventBuilder(pdu_dict) + # Strip off the fields that we want to clobber. + pdu_dict.pop("origin", None) + pdu_dict.pop("origin_server_ts", None) + pdu_dict.pop("unsigned", None) + + builder = self.event_builder_factory.new(pdu_dict) + add_hashes_and_signatures( + builder, + self.hs.hostname, + self.hs.config.signing_key[0] + ) + ev = builder.build() defer.returnValue( - (destination, ev) + (destination, ev, event_format) ) return self._try_destination_list( @@ -650,9 +690,21 @@ class FederationClient(FederationBase): for p in itertools.chain(state, auth_chain) } + room_version = None + for e in state: + if (e.type, e.state_key) == (EventTypes.Create, ""): + room_version = e.content.get("room_version", RoomVersions.V1) + break + + if room_version is None: + # If the state doesn't have a create event then the room is + # invalid, and it would fail auth checks anyway. + raise SynapseError(400, "No create event in state") + valid_pdus = yield self._check_sigs_and_hash_and_fetch( destination, list(pdus.values()), outlier=True, + room_version=room_version, ) valid_pdus_map = { @@ -790,8 +842,10 @@ class FederationClient(FederationBase): for e in content["auth_chain"] ] + room_version = yield self.store.get_room_version(room_id) + signed_auth = yield self._check_sigs_and_hash_and_fetch( - destination, auth_chain, outlier=True + destination, auth_chain, outlier=True, room_version=room_version, ) signed_auth.sort(key=lambda e: e.depth) @@ -838,8 +892,10 @@ class FederationClient(FederationBase): for e in content.get("events", []) ] + room_version = yield self.store.get_room_version(room_id) + signed_events = yield self._check_sigs_and_hash_and_fetch( - destination, events, outlier=False + destination, events, outlier=False, room_version=room_version, ) except HttpResponseException as e: if not e.code == 400: |