Merge pull request matrix-org#3474 from matrix-org/erikj/py3_auth

Fix up auth check
psaavedra · Jul 4, 2018 · 40252d1 · 40252d1
2 parents 508196e + f88dea5
commit 40252d1
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Showing 2 changed files with 6 additions and 1 deletion.
diff --git a/changelog.d/3474.misc b/changelog.d/3474.misc
diff --git a/synapse/event_auth.py b/synapse/event_auth.py
@@ -76,6 +76,7 @@ def check(event, auth_events, do_sig_check=True, do_size_check=True):
         return
 
     if event.type == EventTypes.Create:
+        sender_domain = get_domain_from_id(event.sender)
         room_id_domain = get_domain_from_id(event.room_id)
         if room_id_domain != sender_domain:
             raise AuthError(
@@ -524,7 +525,11 @@ def _check_power_levels(event, auth_events):
                     "to your own"
                 )
 
-        if old_level > user_level or new_level > user_level:
+        # Check if the old and new levels are greater than the user level
+        # (if defined)
+        old_level_too_big = old_level is not None and old_level > user_level
+        new_level_too_big = new_level is not None and new_level > user_level
+        if old_level_too_big or new_level_too_big:
             raise AuthError(
                 403,
                 "You don't have permission to add ops level greater "