diff options
Diffstat (limited to 'synapse')
| -rw-r--r-- | synapse/api/auth.py | 138 | ||||
| -rw-r--r-- | synapse/api/events/__init__.py | 1 | ||||
| -rw-r--r-- | synapse/federation/replication.py | 42 | ||||
| -rw-r--r-- | synapse/handlers/_base.py | 2 | ||||
| -rw-r--r-- | synapse/handlers/federation.py | 144 | ||||
| -rw-r--r-- | synapse/handlers/message.py | 2 |
6 files changed, 194 insertions, 135 deletions
diff --git a/synapse/api/auth.py b/synapse/api/auth.py index c4597c1757..fb911e51a6 100644 --- a/synapse/api/auth.py +++ b/synapse/api/auth.py @@ -38,79 +38,66 @@ class Auth(object): self.store = hs.get_datastore() self.state = hs.get_state_handler() - def check(self, event, raises=False): + def check(self, event, auth_events): """ Checks if this event is correctly authed. Returns: True if the auth checks pass. - Raises: - AuthError if there was a problem authorising this event. This will - be raised only if raises=True. """ try: - if hasattr(event, "room_id"): - if event.old_state_events is None: - # Oh, we don't know what the state of the room was, so we - # are trusting that this is allowed (at least for now) - logger.warn("Trusting event: %s", event.event_id) - return True - - if hasattr(event, "outlier") and event.outlier is True: - # TODO (erikj): Auth for outliers is done differently. - return True + if not hasattr(event, "room_id"): + raise AuthError(500, "Event has no room_id: %s" % event) + if auth_events is None: + # Oh, we don't know what the state of the room was, so we + # are trusting that this is allowed (at least for now) + logger.warn("Trusting event: %s", event.event_id) + return True - if event.type == RoomCreateEvent.TYPE: - # FIXME - return True + if event.type == RoomCreateEvent.TYPE: + # FIXME + return True - # FIXME: Temp hack - if event.type == RoomAliasesEvent.TYPE: - return True + # FIXME: Temp hack + if event.type == RoomAliasesEvent.TYPE: + return True - if event.type == RoomMemberEvent.TYPE: - allowed = self.is_membership_change_allowed(event) - if allowed: - logger.debug("Allowing! %s", event) - else: - logger.debug("Denying! %s", event) - return allowed + if event.type == RoomMemberEvent.TYPE: + allowed = self.is_membership_change_allowed( + event, auth_events + ) + if allowed: + logger.debug("Allowing! %s", event) + else: + logger.debug("Denying! %s", event) + return allowed - self.check_event_sender_in_room(event) - self._can_send_event(event) + self.check_event_sender_in_room(event, auth_events) + self._can_send_event(event, auth_events) - if event.type == RoomPowerLevelsEvent.TYPE: - self._check_power_levels(event) + if event.type == RoomPowerLevelsEvent.TYPE: + self._check_power_levels(event, auth_events) - if event.type == RoomRedactionEvent.TYPE: - self._check_redaction(event) + if event.type == RoomRedactionEvent.TYPE: + self._check_redaction(event, auth_events) - logger.debug("Allowing! %s", event) - return True - else: - raise AuthError(500, "Unknown event: %s" % event) + logger.debug("Allowing! %s", event) except AuthError as e: logger.info( "Event auth check failed on event %s with msg: %s", event, e.msg ) logger.info("Denying! %s", event) - if raises: - raise - - return False + raise @defer.inlineCallbacks def check_joined_room(self, room_id, user_id): - try: - member = yield self.store.get_room_member( - room_id=room_id, - user_id=user_id - ) - self._check_joined_room(member, user_id, room_id) - defer.returnValue(member) - except AttributeError: - pass - defer.returnValue(None) + member = yield self.state.get_current_state( + room_id=room_id, + event_type=RoomMemberEvent.TYPE, + state_key=user_id + ) + self._check_joined_room(member, user_id, room_id) + defer.returnValue(member) @defer.inlineCallbacks def check_host_in_room(self, room_id, host): @@ -130,9 +117,9 @@ class Auth(object): defer.returnValue(False) - def check_event_sender_in_room(self, event): + def check_event_sender_in_room(self, event, auth_events): key = (RoomMemberEvent.TYPE, event.user_id, ) - member_event = event.state_events.get(key) + member_event = auth_events.get(key) return self._check_joined_room( member_event, @@ -147,14 +134,14 @@ class Auth(object): )) @log_function - def is_membership_change_allowed(self, event): + def is_membership_change_allowed(self, event, auth_events): membership = event.content["membership"] # Check if this is the room creator joining: if len(event.prev_events) == 1 and Membership.JOIN == membership: # Get room creation event: key = (RoomCreateEvent.TYPE, "", ) - create = event.old_state_events.get(key) + create = auth_events.get(key) if create and event.prev_events[0][0] == create.event_id: if create.content["creator"] == event.state_key: return True @@ -163,19 +150,19 @@ class Auth(object): # get info about the caller key = (RoomMemberEvent.TYPE, event.user_id, ) - caller = event.old_state_events.get(key) + caller = auth_events.get(key) caller_in_room = caller and caller.membership == Membership.JOIN caller_invited = caller and caller.membership == Membership.INVITE # get info about the target key = (RoomMemberEvent.TYPE, target_user_id, ) - target = event.old_state_events.get(key) + target = auth_events.get(key) target_in_room = target and target.membership == Membership.JOIN key = (RoomJoinRulesEvent.TYPE, "", ) - join_rule_event = event.old_state_events.get(key) + join_rule_event = auth_events.get(key) if join_rule_event: join_rule = join_rule_event.content.get( "join_rule", JoinRules.INVITE @@ -186,11 +173,13 @@ class Auth(object): user_level = self._get_power_level_from_event_state( event, event.user_id, + auth_events, ) ban_level, kick_level, redact_level = ( self._get_ops_level_from_event_state( - event + event, + auth_events, ) ) @@ -260,9 +249,9 @@ class Auth(object): return True - def _get_power_level_from_event_state(self, event, user_id): + def _get_power_level_from_event_state(self, event, user_id, auth_events): key = (RoomPowerLevelsEvent.TYPE, "", ) - power_level_event = event.old_state_events.get(key) + power_level_event = auth_events.get(key) level = None if power_level_event: level = power_level_event.content.get("users", {}).get(user_id) @@ -270,16 +259,16 @@ class Auth(object): level = power_level_event.content.get("users_default", 0) else: key = (RoomCreateEvent.TYPE, "", ) - create_event = event.old_state_events.get(key) + create_event = auth_events.get(key) if (create_event is not None and create_event.content["creator"] == user_id): return 100 return level - def _get_ops_level_from_event_state(self, event): + def _get_ops_level_from_event_state(self, event, auth_events): key = (RoomPowerLevelsEvent.TYPE, "", ) - power_level_event = event.old_state_events.get(key) + power_level_event = auth_events.get(key) if power_level_event: return ( @@ -375,6 +364,11 @@ class Auth(object): key = (RoomMemberEvent.TYPE, event.user_id, ) member_event = event.old_state_events.get(key) + key = (RoomCreateEvent.TYPE, "", ) + create_event = event.old_state_events.get(key) + if create_event: + auth_events.append(create_event.event_id) + if join_rule_event: join_rule = join_rule_event.content.get("join_rule") is_public = join_rule == JoinRules.PUBLIC if join_rule else False @@ -406,9 +400,9 @@ class Auth(object): event.auth_events = zip(auth_events, hashes) @log_function - def _can_send_event(self, event): + def _can_send_event(self, event, auth_events): key = (RoomPowerLevelsEvent.TYPE, "", ) - send_level_event = event.old_state_events.get(key) + send_level_event = auth_events.get(key) send_level = None if send_level_event: send_level = send_level_event.content.get("events", {}).get( @@ -432,6 +426,7 @@ class Auth(object): user_level = self._get_power_level_from_event_state( event, event.user_id, + auth_events, ) if user_level: @@ -468,14 +463,16 @@ class Auth(object): return True - def _check_redaction(self, event): + def _check_redaction(self, event, auth_events): user_level = self._get_power_level_from_event_state( event, event.user_id, + auth_events, ) _, _, redact_level = self._get_ops_level_from_event_state( - event + event, + auth_events, ) if user_level < redact_level: @@ -484,7 +481,7 @@ class Auth(object): "You don't have permission to redact events" ) - def _check_power_levels(self, event): + def _check_power_levels(self, event, auth_events): user_list = event.content.get("users", {}) # Validate users for k, v in user_list.items(): @@ -499,7 +496,7 @@ class Auth(object): raise SynapseError(400, "Not a valid power level: %s" % (v,)) key = (event.type, event.state_key, ) - current_state = event.old_state_events.get(key) + current_state = auth_events.get(key) if not current_state: return @@ -507,6 +504,7 @@ class Auth(object): user_level = self._get_power_level_from_event_state( event, event.user_id, + auth_events, ) # Check other levels: diff --git a/synapse/api/events/__init__.py b/synapse/api/events/__init__.py index 8a35b4cb7d..22939d011a 100644 --- a/synapse/api/events/__init__.py +++ b/synapse/api/events/__init__.py @@ -125,6 +125,7 @@ class SynapseEvent(JsonEncodedObject): pdu_json.pop("outlier", None) pdu_json.pop("replaces_state", None) pdu_json.pop("redacted", None) + pdu_json.pop("prev_content", None) state_hash = pdu_json.pop("state_hash", None) if state_hash is not None: pdu_json.setdefault("unsigned", {})["state_hash"] = state_hash diff --git a/synapse/federation/replication.py b/synapse/federation/replication.py index fa2463d4a3..89c0ef49e9 100644 --- a/synapse/federation/replication.py +++ b/synapse/federation/replication.py @@ -481,11 +481,17 @@ class ReplicationLayer(object): # FIXME: We probably want to do something with the auth_chain given # to us - # auth_chain = [ - # Pdu(outlier=True, **p) for p in content.get("auth_chain", []) - # ] + auth_chain = [ + self.event_from_pdu_json(p, outlier=True) + for p in content.get("auth_chain", []) + ] - defer.returnValue(state) + auth_chain.sort(key=lambda e: e.depth) + + defer.returnValue({ + "state": state, + "auth_chain": auth_chain, + }) @defer.inlineCallbacks def send_invite(self, destination, context, event_id, pdu): @@ -551,12 +557,26 @@ class ReplicationLayer(object): ) if not exists: - yield self.get_pdu( - origin, - event_id=e_id, - outlier=True, - ) - logger.debug("Processed pdu %s", e_id) + try: + logger.debug( + "Getting missing auth event %s from %s", + e_id, + origin, + ) + + yield self.get_pdu( + origin, + event_id=e_id, + outlier=True, + ) + + logger.debug("Processed pdu %s", e_id) + except: + logger.warn( + "Failed to get auth event %s from %s", + e_id, + origin + ) # Get missing pdus if necessary. if not pdu.outlier: @@ -578,7 +598,7 @@ class ReplicationLayer(object): try: yield self.get_pdu( - pdu.origin, + origin, event_id=event_id, ) logger.debug("Processed pdu %s", event_id) diff --git a/synapse/handlers/_base.py b/synapse/handlers/_base.py index d53cd3df3e..15adc9dc2c 100644 --- a/synapse/handlers/_base.py +++ b/synapse/handlers/_base.py @@ -78,7 +78,7 @@ class BaseHandler(object): if not suppress_auth: logger.debug("Authing...") - self.auth.check(event, raises=True) + self.auth.check(event, auth_events=event.old_state_events) logger.debug("Authed") else: logger.debug("Suppressed auth.") diff --git a/synapse/handlers/federation.py b/synapse/handlers/federation.py index f601de4488..14066ac4f3 100644 --- a/synapse/handlers/federation.py +++ b/synapse/handlers/federation.py @@ -24,7 +24,8 @@ from synapse.api.constants import Membership from synapse.util.logutils import log_function from synapse.util.async import run_on_reactor from synapse.crypto.event_signing import ( - compute_event_signature, check_event_content_hash + compute_event_signature, check_event_content_hash, + add_hashes_and_signatures, ) from syutil.jsonutil import encode_canonical_json @@ -141,15 +142,14 @@ class FederationHandler(BaseHandler): ) event = redacted_event - is_new_state = yield self.state_handler.annotate_event_with_state( - event, - old_state=state - ) - logger.debug("Event: %s", event) try: - self.auth.check(event, raises=True) + yield self._handle_new_event( + event, + state=state, + backfilled=backfilled + ) except AuthError as e: raise FederationError( "ERROR", @@ -158,17 +158,6 @@ class FederationHandler(BaseHandler): affected=event.event_id, ) - is_new_state = is_new_state and not backfilled - - # TODO: Implement something in federation that allows us to - # respond to PDU. - - yield self.store.persist_event( - event, - backfilled, - is_new_state=is_new_state - ) - room = yield self.store.get_room(event.room_id) if not room: @@ -276,6 +265,8 @@ class FederationHandler(BaseHandler): We suspend processing of any received events from this room until we have finished processing the join. """ + logger.debug("Joining %s to %s", joinee, room_id) + pdu = yield self.replication_layer.make_join( target_host, room_id, @@ -298,19 +289,28 @@ class FederationHandler(BaseHandler): try: event.event_id = self.event_factory.create_event_id() + event.origin = self.hs.hostname event.content = content - state = yield self.replication_layer.send_join( + if not hasattr(event, "signatures"): + event.signatures = {} + + add_hashes_and_signatures( + event, + self.hs.hostname, + self.hs.config.signing_key[0], + ) + + ret = yield self.replication_layer.send_join( target_host, event ) - logger.debug("do_invite_join state: %s", state) + state = ret["state"] + auth_chain = ret["auth_chain"] - yield self.state_handler.annotate_event_with_state( - event, - old_state=state - ) + logger.debug("do_invite_join auth_chain: %s", auth_chain) + logger.debug("do_invite_join state: %s", state) logger.debug("do_invite_join event: %s", event) @@ -324,34 +324,31 @@ class FederationHandler(BaseHandler): # FIXME pass + for e in auth_chain: + e.outlier = True + yield self._handle_new_event(e) + for e in state: # FIXME: Auth these. e.outlier = True + yield self._handle_new_event(e) - yield self.state_handler.annotate_event_with_state( - e, - ) - - yield self.store.persist_event( - e, - backfilled=False, - is_new_state=True - ) + yield self._handle_new_event(event, state=state) - yield self.store.persist_event( - event, - backfilled=False, - is_new_state=True + yield self.notifier.on_new_room_event( + event, extra_users=[joinee] ) + + logger.debug("Finished joining %s to %s", joinee, room_id) finally: room_queue = self.room_queues[room_id] del self.room_queues[room_id] for p in room_queue: try: - yield self.on_receive_pdu(p, backfilled=False) + self.on_receive_pdu(p, backfilled=False) except: - pass + logger.exception("Couldn't handle pdu") defer.returnValue(True) @@ -375,7 +372,7 @@ class FederationHandler(BaseHandler): yield self.state_handler.annotate_event_with_state(event) yield self.auth.add_auth_events(event) - self.auth.check(event, raises=True) + self.auth.check(event, auth_events=event.old_state_events) pdu = event @@ -391,17 +388,7 @@ class FederationHandler(BaseHandler): event.outlier = False - state_handler = self.state_handler - is_new_state = yield state_handler.annotate_event_with_state(event) - self.auth.check(event, raises=True) - - # FIXME (erikj): All this is duplicated above :( - - yield self.store.persist_event( - event, - backfilled=False, - is_new_state=is_new_state - ) + yield self._handle_new_event(event) extra_users = [] if event.type == RoomMemberEvent.TYPE: @@ -414,7 +401,7 @@ class FederationHandler(BaseHandler): ) if event.type == RoomMemberEvent.TYPE: - if event.membership == Membership.JOIN: + if event.content["membership"] == Membership.JOIN: user = self.hs.parse_userid(event.state_key) yield self.distributor.fire( "user_joined_room", user=user, room_id=event.room_id @@ -565,3 +552,56 @@ class FederationHandler(BaseHandler): ) while waiters: waiters.pop().callback(None) + + @defer.inlineCallbacks + def _handle_new_event(self, event, state=None, backfilled=False): + is_new_state = yield self.state_handler.annotate_event_with_state( + event, + old_state=state + ) + + if event.old_state_events: + known_ids = set( + [s.event_id for s in event.old_state_events.values()] + ) + for e_id, _ in event.auth_events: + if e_id not in known_ids: + e = yield self.store.get_event( + e_id, + allow_none=True, + ) + + if not e: + # TODO: Do some conflict res to make sure that we're + # not the ones who are wrong. + logger.info( + "Rejecting %s as %s not in %s", + event.event_id, e_id, known_ids, + ) + raise AuthError(403, "Auth events are stale") + + auth_events = event.old_state_events + else: + # We need to get the auth events from somewhere. + + # TODO: Don't just hit the DBs? + + auth_events = {} + for e_id, _ in event.auth_events: + e = yield self.store.get_event( + e_id, + allow_none=True, + ) + + if not e: + raise AuthError(403, "Can't find auth event.") + + auth_events[(e.type, e.state_key)] = e + + self.auth.check(event, auth_events=auth_events) + + yield self.store.persist_event( + event, + backfilled=backfilled, + is_new_state=(is_new_state and not backfilled) + ) diff --git a/synapse/handlers/message.py b/synapse/handlers/message.py index ae0fc43ca2..42dc4d46f3 100644 --- a/synapse/handlers/message.py +++ b/synapse/handlers/message.py @@ -306,7 +306,7 @@ class MessageHandler(BaseHandler): auth_user = self.hs.parse_userid(user_id) # TODO: These concurrently - state_tuples = yield self.store.get_current_state(room_id) + state_tuples = yield self.state_handler.get_current_state(room_id) state = [self.hs.serialize_event(x) for x in state_tuples] member_event = (yield self.store.get_room_member( |