diff options
Diffstat (limited to 'synapse')
| -rw-r--r-- | synapse/api/auth.py | 6 | ||||
| -rw-r--r-- | synapse/appservice/__init__.py | 4 | ||||
| -rw-r--r-- | synapse/config/appservice.py | 12 | ||||
| -rw-r--r-- | synapse/federation/federation_server.py | 4 | ||||
| -rw-r--r-- | synapse/handlers/federation.py | 96 |
5 files changed, 91 insertions, 31 deletions
diff --git a/synapse/api/auth.py b/synapse/api/auth.py index 54186695cd..088b4e8b6d 100644 --- a/synapse/api/auth.py +++ b/synapse/api/auth.py @@ -19,6 +19,7 @@ from six import itervalues import pymacaroons from twisted.internet import defer +from netaddr import IPAddress import synapse.types from synapse import event_auth @@ -244,6 +245,11 @@ class Auth(object): if app_service is None: defer.returnValue((None, None)) + if app_service.ip_range_whitelist: + ip_address = IPAddress(self.hs.get_ip_from_request(request)) + if ip_address not in app_service.ip_range_whitelist: + defer.returnValue((None, None)) + if "user_id" not in request.args: defer.returnValue((app_service.sender, app_service)) diff --git a/synapse/appservice/__init__.py b/synapse/appservice/__init__.py index d1c598622a..328cbfa284 100644 --- a/synapse/appservice/__init__.py +++ b/synapse/appservice/__init__.py @@ -85,7 +85,8 @@ class ApplicationService(object): NS_LIST = [NS_USERS, NS_ALIASES, NS_ROOMS] def __init__(self, token, hostname, url=None, namespaces=None, hs_token=None, - sender=None, id=None, protocols=None, rate_limited=True): + sender=None, id=None, protocols=None, rate_limited=True, + ip_range_whitelist=None): self.token = token self.url = url self.hs_token = hs_token @@ -93,6 +94,7 @@ class ApplicationService(object): self.server_name = hostname self.namespaces = self._check_namespaces(namespaces) self.id = id + self.ip_range_whitelist = ip_range_whitelist if "|" in self.id: raise Exception("application service ID cannot contain '|' character") diff --git a/synapse/config/appservice.py b/synapse/config/appservice.py index 277305e184..0c27bb2fa7 100644 --- a/synapse/config/appservice.py +++ b/synapse/config/appservice.py @@ -17,6 +17,8 @@ from ._base import Config, ConfigError from synapse.appservice import ApplicationService from synapse.types import UserID +from netaddr import IPSet + import yaml import logging @@ -154,6 +156,13 @@ def _load_appservice(hostname, as_info, config_filename): " will not receive events or queries.", config_filename, ) + + ip_range_whitelist = None + if as_info.get('ip_range_whitelist'): + ip_range_whitelist = IPSet( + as_info.get('ip_range_whitelist') + ) + return ApplicationService( token=as_info["as_token"], hostname=hostname, @@ -163,5 +172,6 @@ def _load_appservice(hostname, as_info, config_filename): sender=user_id, id=as_info["id"], protocols=protocols, - rate_limited=rate_limited + rate_limited=rate_limited, + ip_range_whitelist=ip_range_whitelist, ) diff --git a/synapse/federation/federation_server.py b/synapse/federation/federation_server.py index a00420a24b..fe51ba6806 100644 --- a/synapse/federation/federation_server.py +++ b/synapse/federation/federation_server.py @@ -549,7 +549,9 @@ class FederationServer(FederationBase): affected=pdu.event_id, ) - yield self.handler.on_receive_pdu(origin, pdu, get_missing=True) + yield self.handler.on_receive_pdu( + origin, pdu, get_missing=True, sent_to_us_directly=True, + ) def __str__(self): return "<ReplicationLayer(%s)>" % self.server_name diff --git a/synapse/handlers/federation.py b/synapse/handlers/federation.py index b6f8d4cf82..13117d70fe 100644 --- a/synapse/handlers/federation.py +++ b/synapse/handlers/federation.py @@ -44,6 +44,7 @@ from synapse.util.frozenutils import unfreeze from synapse.crypto.event_signing import ( compute_event_signature, add_hashes_and_signatures, ) +from synapse.state import resolve_events_with_factory from synapse.types import UserID, get_domain_from_id from synapse.events.utils import prune_event @@ -89,7 +90,9 @@ class FederationHandler(BaseHandler): @defer.inlineCallbacks @log_function - def on_receive_pdu(self, origin, pdu, get_missing=True): + def on_receive_pdu( + self, origin, pdu, get_missing=True, sent_to_us_directly=False, + ): """ Process a PDU received via a federation /send/ transaction, or via backfill of missing prev_events @@ -163,14 +166,11 @@ class FederationHandler(BaseHandler): "Ignoring PDU %s for room %s from %s as we've left the room!", pdu.event_id, pdu.room_id, origin, ) - return + defer.returnValue(None) state = None - auth_chain = [] - fetch_state = False - # Get missing pdus if necessary. if not pdu.internal_metadata.is_outlier(): # We only backfill backwards to the min depth. @@ -225,26 +225,60 @@ class FederationHandler(BaseHandler): list(prevs - seen)[:5], ) - if prevs - seen: - logger.info( - "Still missing %d events for room %r: %r...", - len(prevs - seen), pdu.room_id, list(prevs - seen)[:5] + if sent_to_us_directly and prevs - seen: + # If they have sent it to us directly, and the server + # isn't telling us about the auth events that it's + # made a message referencing, we explode + raise FederationError( + "ERROR", + 403, + ( + "Your server isn't divulging details about prev_events " + "referenced in this event." + ), + affected=pdu.event_id, ) - fetch_state = True + elif prevs - seen: + # Calculate the state of the previous events, and + # de-conflict them to find the current state. + state_groups = [] + auth_chains = set() + try: + # Get the state of the events we know about + ours = yield self.store.get_state_groups(pdu.room_id, list(seen)) + state_groups.append(ours) + + # Ask the remote server for the states we don't + # know about + for p in prevs - seen: + state, got_auth_chain = ( + yield self.replication_layer.get_state_for_room( + origin, pdu.room_id, p + ) + ) + auth_chains.update(got_auth_chain) + state_group = {(x.type, x.state_key): x.event_id for x in state} + state_groups.append(state_group) + + # Resolve any conflicting state + def fetch(ev_ids): + return self.store.get_events( + ev_ids, get_prev_content=False, check_redacted=False + ) - if fetch_state: - # We need to get the state at this event, since we haven't - # processed all the prev events. - logger.debug( - "_handle_new_pdu getting state for %s", - pdu.room_id - ) - try: - state, auth_chain = yield self.replication_layer.get_state_for_room( - origin, pdu.room_id, pdu.event_id, - ) - except Exception: - logger.exception("Failed to get state for event: %s", pdu.event_id) + state_map = yield resolve_events_with_factory( + state_groups, {pdu.event_id: pdu}, fetch + ) + + state = (yield self.store.get_events(state_map.values())).values() + auth_chain = list(auth_chains) + except Exception: + raise FederationError( + "ERROR", + 403, + "We can't get valid state history.", + affected=pdu.event_id, + ) yield self._process_received_pdu( origin, @@ -322,11 +356,17 @@ class FederationHandler(BaseHandler): for e in missing_events: logger.info("Handling found event %s", e.event_id) - yield self.on_receive_pdu( - origin, - e, - get_missing=False - ) + try: + yield self.on_receive_pdu( + origin, + e, + get_missing=False + ) + except FederationError as e: + if e.code == 403: + logger.warn("Event %s failed history check.") + else: + raise @log_function @defer.inlineCallbacks |