Fix auth checks to all use the given old_event_state

synapse/api/auth.py

@@ -22,7 +22,7 @@ from synapse.api.errors import AuthError, StoreError, Codes, SynapseError
 from synapse.api.events.room import (
     RoomMemberEvent, RoomPowerLevelsEvent, RoomRedactionEvent,
     RoomJoinRulesEvent, RoomOpsPowerLevelsEvent, InviteJoinEvent,
-    RoomCreateEvent,
+    RoomCreateEvent, RoomSendEventLevelEvent, RoomAddStateLevelEvent,
 )
 from synapse.util.logutils import log_function
 
@@ -37,8 +37,7 @@ class Auth(object):
         self.hs = hs
         self.store = hs.get_datastore()
 
-    @defer.inlineCallbacks
-    def check(self, event, snapshot, raises=False):
+    def check(self, event, raises=False):
         """ Checks if this event is correctly authed.
 
         Returns:
@@ -52,17 +51,17 @@ class Auth(object):
                 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)
-                    defer.returnValue(True)
+                    return True
 
                 if hasattr(event, "outlier") and event.outlier is True:
                     # TODO (erikj): Auth for outliers is done differently.
-                    defer.returnValue(True)
+                    return True
 
                 is_state = hasattr(event, "state_key")
 
                 if event.type == RoomCreateEvent.TYPE:
                     # FIXME
-                    defer.returnValue(True)
+                    return True
 
                 if event.type == RoomMemberEvent.TYPE:
                     self._can_replace_state(event)
@@ -71,8 +70,7 @@ class Auth(object):
                         logger.debug("Allowing! %s", event)
                     else:
                         logger.debug("Denying! %s", event)
-                    defer.returnValue(allowed)
-                    return
+                    return allowed
 
                 if not event.type == InviteJoinEvent.TYPE:
                     self.check_event_sender_in_room(event)
@@ -80,10 +78,10 @@ class Auth(object):
                 if is_state:
                     # TODO (erikj): This really only should be called for *new*
                     # state
-                    yield self._can_add_state(event)
+                    self._can_add_state(event)
                     self._can_replace_state(event)
                 else:
-                    yield self._can_send_event(event)
+                    self._can_send_event(event)
 
                 if event.type == RoomPowerLevelsEvent.TYPE:
                     self._check_power_levels(event)
@@ -91,9 +89,8 @@ class Auth(object):
                 if event.type == RoomRedactionEvent.TYPE:
                     self._check_redaction(event)
 
-
                 logger.debug("Allowing! %s", event)
-                defer.returnValue(True)
+                return True
             else:
                 raise AuthError(500, "Unknown event: %s" % event)
         except AuthError as e:
@@ -103,7 +100,7 @@ class Auth(object):
             if raises:
                 raise e
 
-        defer.returnValue(False)
+        return False
 
     @defer.inlineCallbacks
     def check_joined_room(self, room_id, user_id):
@@ -326,10 +323,15 @@ class Auth(object):
     def is_server_admin(self, user):
         return self.store.is_server_admin(user)
 
-    @defer.inlineCallbacks
     @log_function
     def _can_send_event(self, event):
-        send_level = yield self.store.get_send_event_level(event.room_id)
+        key = (RoomSendEventLevelEvent.TYPE, "", )
+        send_level_event = event.old_state_events.get(key)
+        send_level = None
+        if send_level_event:
+            send_level = send_level_event.content.get(event.user_id)
+            if not send_level:
+                send_level = send_level_event.content.get("level", 0)
 
         if send_level:
             send_level = int(send_level)
@@ -351,16 +353,21 @@ class Auth(object):
                 403, "You don't have permission to post to the room"
             )
 
-        defer.returnValue(True)
+        return True
 
-    @defer.inlineCallbacks
     def _can_add_state(self, event):
-        add_level = yield self.store.get_add_state_level(event.room_id)
-
+        key = (RoomAddStateLevelEvent.TYPE, "", )
+        add_level_event = event.old_state_events.get(key)
+        add_level = None
+        if add_level_event:
+            add_level = add_level_event.content.get(event.user_id)
             if not add_level:
-            defer.returnValue(True)
+                add_level = add_level_event.content.get("level", 0)
 
+        if add_level:
             add_level = int(add_level)
+        else:
+            add_level = 0
 
         user_level = self._get_power_level_from_event_state(
             event,
@@ -374,7 +381,7 @@ class Auth(object):
                 403, "You don't have permission to add state to the room"
             )
 
-        defer.returnValue(True)
+        return True
 
     def _can_replace_state(self, event):
         user_level = self._get_power_level_from_event_state(

synapse/handlers/_base.py

@@ -20,6 +20,12 @@ from synapse.util.async import run_on_reactor
 
 from synapse.crypto.event_signing import add_hashes_and_signatures
 
+import logging
+
+
+logger = logging.getLogger(__name__)
+
+
 class BaseHandler(object):
 
     def __init__(self, hs):
@@ -58,15 +64,18 @@ class BaseHandler(object):
 
         yield self.state_handler.annotate_state_groups(event)
 
-        yield add_hashes_and_signatures(
+        logger.debug("Signing event...")
+
+        add_hashes_and_signatures(
             event, self.server_name, self.signing_key
         )
 
-        if not suppress_auth:
-            yield self.auth.check(event, snapshot, raises=True)
+        logger.debug("Signed event.")
 
-        if hasattr(event, "state_key"):
-            yield self.state_handler.handle_new_event(event, snapshot)
+        if not suppress_auth:
+            logger.debug("Authing...")
+            self.auth.check(event, raises=True)
+            logger.debug("Authed")
 
         yield self.store.persist_event(event)
 

synapse/handlers/federation.py

@@ -118,7 +118,7 @@ class FederationHandler(BaseHandler):
         logger.debug("Event: %s", event)
 
         try:
-            yield self.auth.check(event, None, raises=True)
+            self.auth.check(event, raises=True)
         except AuthError as e:
             raise FederationError(
                 "ERROR",
@@ -319,7 +319,7 @@ class FederationHandler(BaseHandler):
         snapshot.fill_out_prev_events(event)
 
         yield self.state_handler.annotate_state_groups(event)
-        yield self.auth.check(event, None, raises=True)
+        self.auth.check(event, raises=True)
 
         pdu = self.pdu_codec.pdu_from_event(event)
 
@@ -333,7 +333,7 @@ class FederationHandler(BaseHandler):
         event.outlier = False
 
         is_new_state = yield self.state_handler.annotate_state_groups(event)
-        yield self.auth.check(event, None, raises=True)
+        self.auth.check(event, raises=True)
 
         # FIXME (erikj):  All this is duplicated above :(
 

synapse/state.py

@@ -188,11 +188,15 @@ class StateHandler(object):
             consumeErrors=True
         )
 
-        max_power = max([int(p) for p in new_powers])
+        new_powers = [
+            int(p) if p else 0 for p in new_powers
+        ]
+
+        max_power = max(new_powers)
 
         curr_events = [
             z[0] for z in zip(curr_events, new_powers)
-            if int(z[1]) == max_power
+            if z[1] == max_power
         ]
 
         if not curr_events: