diff --git a/changelog.d/6856.misc b/changelog.d/6856.misc new file mode 100644 index 0000000000..08aa80bcd9 --- /dev/null +++ b/changelog.d/6856.misc @@ -0,0 +1 @@ +Refactoring work in preparation for changing the event redaction algorithm. diff --git a/synapse/federation/federation_base.py b/synapse/federation/federation_base.py index 0e22183280..ebe8b8e9fe 100644 --- a/synapse/federation/federation_base.py +++ b/synapse/federation/federation_base.py @@ -1,5 +1,6 @@ # -*- coding: utf-8 -*- # Copyright 2015, 2016 OpenMarket Ltd +# Copyright 2020 The Matrix.org Foundation C.I.C. # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. @@ -22,9 +23,13 @@ from twisted.internet.defer import DeferredList from synapse.api.constants import MAX_DEPTH, EventTypes, Membership from synapse.api.errors import Codes, SynapseError -from synapse.api.room_versions import KNOWN_ROOM_VERSIONS, EventFormatVersions +from synapse.api.room_versions import ( + KNOWN_ROOM_VERSIONS, + EventFormatVersions, + RoomVersion, +) from synapse.crypto.event_signing import check_event_content_hash -from synapse.events import event_type_from_format_version +from synapse.events import EventBase, event_type_from_format_version from synapse.events.utils import prune_event from synapse.http.servlet import assert_params_in_dict from synapse.logging.context import ( @@ -33,7 +38,7 @@ from synapse.logging.context import ( make_deferred_yieldable, preserve_fn, ) -from synapse.types import get_domain_from_id +from synapse.types import JsonDict, get_domain_from_id from synapse.util import unwrapFirstError logger = logging.getLogger(__name__) @@ -342,16 +347,15 @@ def _is_invite_via_3pid(event): ) -def event_from_pdu_json(pdu_json, event_format_version, outlier=False): - """Construct a FrozenEvent from an event json received over federation +def event_from_pdu_json( + pdu_json: JsonDict, room_version: RoomVersion, outlier: bool = False +) -> EventBase: + """Construct an EventBase from an event json received over federation Args: - pdu_json (object): pdu as received over federation - event_format_version (int): The event format version - outlier (bool): True to mark this event as an outlier - - Returns: - FrozenEvent + pdu_json: pdu as received over federation + room_version: The version of the room this event belongs to + outlier: True to mark this event as an outlier Raises: SynapseError: if the pdu is missing required fields or is otherwise @@ -370,7 +374,7 @@ def event_from_pdu_json(pdu_json, event_format_version, outlier=False): elif depth > MAX_DEPTH: raise SynapseError(400, "Depth too large", Codes.BAD_JSON) - event = event_type_from_format_version(event_format_version)(pdu_json) + event = event_type_from_format_version(room_version.event_format)(pdu_json) event.internal_metadata.outlier = outlier diff --git a/synapse/federation/federation_client.py b/synapse/federation/federation_client.py index 5fb4bd414c..4870e39652 100644 --- a/synapse/federation/federation_client.py +++ b/synapse/federation/federation_client.py @@ -49,7 +49,7 @@ from synapse.api.room_versions import ( RoomVersion, RoomVersions, ) -from synapse.events import EventBase, builder, room_version_to_event_format +from synapse.events import EventBase, builder from synapse.federation.federation_base import FederationBase, event_from_pdu_json from synapse.logging.context import make_deferred_yieldable from synapse.logging.utils import log_function @@ -209,18 +209,18 @@ class FederationClient(FederationBase): logger.debug("backfill transaction_data=%r", transaction_data) - room_version = await self.store.get_room_version_id(room_id) - format_ver = room_version_to_event_format(room_version) + room_version = await self.store.get_room_version(room_id) pdus = [ - event_from_pdu_json(p, format_ver, outlier=False) + event_from_pdu_json(p, room_version, outlier=False) for p in transaction_data["pdus"] ] # FIXME: We should handle signature failures more gracefully. pdus[:] = await make_deferred_yieldable( defer.gatherResults( - self._check_sigs_and_hashes(room_version, pdus), consumeErrors=True + self._check_sigs_and_hashes(room_version.identifier, pdus), + consumeErrors=True, ).addErrback(unwrapFirstError) ) @@ -262,8 +262,6 @@ class FederationClient(FederationBase): pdu_attempts = self.pdu_destination_tried.setdefault(event_id, {}) - format_ver = room_version.event_format - signed_pdu = None for destination in destinations: now = self._clock.time_msec() @@ -284,7 +282,7 @@ class FederationClient(FederationBase): ) pdu_list = [ - event_from_pdu_json(p, format_ver, outlier=outlier) + event_from_pdu_json(p, room_version, outlier=outlier) for p in transaction_data["pdus"] ] @@ -350,15 +348,15 @@ class FederationClient(FederationBase): async def get_event_auth(self, destination, room_id, event_id): res = await self.transport_layer.get_event_auth(destination, room_id, event_id) - room_version = await self.store.get_room_version_id(room_id) - format_ver = room_version_to_event_format(room_version) + room_version = await self.store.get_room_version(room_id) auth_chain = [ - event_from_pdu_json(p, format_ver, outlier=True) for p in res["auth_chain"] + event_from_pdu_json(p, room_version, outlier=True) + for p in res["auth_chain"] ] signed_auth = await self._check_sigs_and_hash_and_fetch( - destination, auth_chain, outlier=True, room_version=room_version + destination, auth_chain, outlier=True, room_version=room_version.identifier ) signed_auth.sort(key=lambda e: e.depth) @@ -547,12 +545,12 @@ class FederationClient(FederationBase): logger.debug("Got content: %s", content) state = [ - event_from_pdu_json(p, room_version.event_format, outlier=True) + event_from_pdu_json(p, room_version, outlier=True) for p in content.get("state", []) ] auth_chain = [ - event_from_pdu_json(p, room_version.event_format, outlier=True) + event_from_pdu_json(p, room_version, outlier=True) for p in content.get("auth_chain", []) ] @@ -677,7 +675,7 @@ class FederationClient(FederationBase): logger.debug("Got response to send_invite: %s", pdu_dict) - pdu = event_from_pdu_json(pdu_dict, room_version.event_format) + pdu = event_from_pdu_json(pdu_dict, room_version) # Check signatures are correct. pdu = await self._check_sigs_and_hash(room_version.identifier, pdu) @@ -865,15 +863,14 @@ class FederationClient(FederationBase): timeout=timeout, ) - room_version = await self.store.get_room_version_id(room_id) - format_ver = room_version_to_event_format(room_version) + room_version = await self.store.get_room_version(room_id) events = [ - event_from_pdu_json(e, format_ver) for e in content.get("events", []) + event_from_pdu_json(e, room_version) for e in content.get("events", []) ] signed_events = await self._check_sigs_and_hash_and_fetch( - destination, events, outlier=False, room_version=room_version + destination, events, outlier=False, room_version=room_version.identifier ) except HttpResponseException as e: if not e.code == 400: diff --git a/synapse/federation/federation_server.py b/synapse/federation/federation_server.py index 8e3933b6c5..2489832a11 100644 --- a/synapse/federation/federation_server.py +++ b/synapse/federation/federation_server.py @@ -38,7 +38,6 @@ from synapse.api.errors import ( UnsupportedRoomVersionError, ) from synapse.api.room_versions import KNOWN_ROOM_VERSIONS -from synapse.events import room_version_to_event_format from synapse.federation.federation_base import FederationBase, event_from_pdu_json from synapse.federation.persistence import TransactionActions from synapse.federation.units import Edu, Transaction @@ -234,24 +233,17 @@ class FederationServer(FederationBase): continue try: - room_version = await self.store.get_room_version_id(room_id) + room_version = await self.store.get_room_version(room_id) except NotFoundError: logger.info("Ignoring PDU for unknown room_id: %s", room_id) continue - - try: - format_ver = room_version_to_event_format(room_version) - except UnsupportedRoomVersionError: + except UnsupportedRoomVersionError as e: # this can happen if support for a given room version is withdrawn, # so that we still get events for said room. - logger.info( - "Ignoring PDU for room %s with unknown version %s", - room_id, - room_version, - ) + logger.info("Ignoring PDU: %s", e) continue - event = event_from_pdu_json(p, format_ver) + event = event_from_pdu_json(p, room_version) pdus_by_room.setdefault(room_id, []).append(event) pdu_results = {} @@ -407,9 +399,7 @@ class FederationServer(FederationBase): Codes.UNSUPPORTED_ROOM_VERSION, ) - format_ver = room_version.event_format - - pdu = event_from_pdu_json(content, format_ver) + pdu = event_from_pdu_json(content, room_version) origin_host, _ = parse_server_name(origin) await self.check_server_matches_acl(origin_host, pdu.room_id) pdu = await self._check_sigs_and_hash(room_version.identifier, pdu) @@ -420,16 +410,15 @@ class FederationServer(FederationBase): async def on_send_join_request(self, origin, content, room_id): logger.debug("on_send_join_request: content: %s", content) - room_version = await self.store.get_room_version_id(room_id) - format_ver = room_version_to_event_format(room_version) - pdu = event_from_pdu_json(content, format_ver) + room_version = await self.store.get_room_version(room_id) + pdu = event_from_pdu_json(content, room_version) origin_host, _ = parse_server_name(origin) await self.check_server_matches_acl(origin_host, pdu.room_id) logger.debug("on_send_join_request: pdu sigs: %s", pdu.signatures) - pdu = await self._check_sigs_and_hash(room_version, pdu) + pdu = await self._check_sigs_and_hash(room_version.identifier, pdu) res_pdus = await self.handler.on_send_join_request(origin, pdu) time_now = self._clock.time_msec() @@ -451,16 +440,15 @@ class FederationServer(FederationBase): async def on_send_leave_request(self, origin, content, room_id): logger.debug("on_send_leave_request: content: %s", content) - room_version = await self.store.get_room_version_id(room_id) - format_ver = room_version_to_event_format(room_version) - pdu = event_from_pdu_json(content, format_ver) + room_version = await self.store.get_room_version(room_id) + pdu = event_from_pdu_json(content, room_version) origin_host, _ = parse_server_name(origin) await self.check_server_matches_acl(origin_host, pdu.room_id) logger.debug("on_send_leave_request: pdu sigs: %s", pdu.signatures) - pdu = await self._check_sigs_and_hash(room_version, pdu) + pdu = await self._check_sigs_and_hash(room_version.identifier, pdu) await self.handler.on_send_leave_request(origin, pdu) return {} @@ -498,15 +486,14 @@ class FederationServer(FederationBase): origin_host, _ = parse_server_name(origin) await self.check_server_matches_acl(origin_host, room_id) - room_version = await self.store.get_room_version_id(room_id) - format_ver = room_version_to_event_format(room_version) + room_version = await self.store.get_room_version(room_id) auth_chain = [ - event_from_pdu_json(e, format_ver) for e in content["auth_chain"] + event_from_pdu_json(e, room_version) for e in content["auth_chain"] ] signed_auth = await self._check_sigs_and_hash_and_fetch( - origin, auth_chain, outlier=True, room_version=room_version + origin, auth_chain, outlier=True, room_version=room_version.identifier ) ret = await self.handler.on_query_auth( diff --git a/tests/handlers/test_federation.py b/tests/handlers/test_federation.py index b4d92cf732..132e35651d 100644 --- a/tests/handlers/test_federation.py +++ b/tests/handlers/test_federation.py @@ -99,6 +99,7 @@ class FederationTestCase(unittest.HomeserverTestCase): user_id = self.register_user("kermit", "test") tok = self.login("kermit", "test") room_id = self.helper.create_room_as(room_creator=user_id, tok=tok) + room_version = self.get_success(self.store.get_room_version(room_id)) # pretend that another server has joined join_event = self._build_and_send_join_event(OTHER_SERVER, OTHER_USER, room_id) @@ -120,7 +121,7 @@ class FederationTestCase(unittest.HomeserverTestCase): "auth_events": [], "origin_server_ts": self.clock.time_msec(), }, - join_event.format_version, + room_version, ) with LoggingContext(request="send_rejected"): @@ -149,6 +150,7 @@ class FederationTestCase(unittest.HomeserverTestCase): user_id = self.register_user("kermit", "test") tok = self.login("kermit", "test") room_id = self.helper.create_room_as(room_creator=user_id, tok=tok) + room_version = self.get_success(self.store.get_room_version(room_id)) # pretend that another server has joined join_event = self._build_and_send_join_event(OTHER_SERVER, OTHER_USER, room_id) @@ -171,7 +173,7 @@ class FederationTestCase(unittest.HomeserverTestCase): "auth_events": [], "origin_server_ts": self.clock.time_msec(), }, - join_event.format_version, + room_version, ) with LoggingContext(request="send_rejected"):