diff options
Diffstat (limited to 'synapse/handlers/room.py')
| -rw-r--r-- | synapse/handlers/room.py | 76 |
1 files changed, 62 insertions, 14 deletions
diff --git a/synapse/handlers/room.py b/synapse/handlers/room.py index cb957f2033..bf907b7881 100644 --- a/synapse/handlers/room.py +++ b/synapse/handlers/room.py @@ -872,6 +872,8 @@ class RoomCreationHandler: visibility = config.get("visibility", "private") is_public = visibility == "public" + self._validate_room_config(config, visibility) + room_id = await self._generate_and_create_room_id( creator_id=user_id, is_public=is_public, @@ -1111,20 +1113,7 @@ class RoomCreationHandler: return new_event, new_unpersisted_context - visibility = room_config.get("visibility", "private") - preset_config = room_config.get( - "preset", - RoomCreationPreset.PRIVATE_CHAT - if visibility == "private" - else RoomCreationPreset.PUBLIC_CHAT, - ) - - try: - config = self._presets_dict[preset_config] - except KeyError: - raise SynapseError( - 400, f"'{preset_config}' is not a valid preset", errcode=Codes.BAD_JSON - ) + preset_config, config = self._room_preset_config(room_config) # MSC2175 removes the creator field from the create event. if not room_version.msc2175_implicit_room_creator: @@ -1306,6 +1295,65 @@ class RoomCreationHandler: assert last_event.internal_metadata.stream_ordering is not None return last_event.internal_metadata.stream_ordering, last_event.event_id, depth + def _validate_room_config( + self, + config: JsonDict, + visibility: str, + ) -> None: + """Checks configuration parameters for a /createRoom request. + + If validation detects invalid parameters an exception may be raised to + cause room creation to be aborted and an error response to be returned + to the client. + + Args: + config: A dict of configuration options. Originally from the body of + the /createRoom request + visibility: One of "public" or "private" + """ + + # Validate the requested preset, raise a 400 error if not valid + preset_name, preset_config = self._room_preset_config(config) + + # If the user is trying to create an encrypted room and this is forbidden + # by the configured default_power_level_content_override, then reject the + # request before the room is created. + raw_initial_state = config.get("initial_state", []) + room_encryption_event = any( + s.get("type", "") == EventTypes.RoomEncryption for s in raw_initial_state + ) + + if preset_config["encrypted"] or room_encryption_event: + if self._default_power_level_content_override: + override = self._default_power_level_content_override.get(preset_name) + if override is not None: + event_levels = override.get("events", {}) + room_admin_level = event_levels.get(EventTypes.PowerLevels, 100) + encryption_level = event_levels.get(EventTypes.RoomEncryption, 100) + if encryption_level > room_admin_level: + raise SynapseError( + 403, + f"You cannot create an encrypted room. user_level ({room_admin_level}) < send_level ({encryption_level})", + ) + + def _room_preset_config(self, room_config: JsonDict) -> Tuple[str, dict]: + # The spec says rooms should default to private visibility if + # `visibility` is not specified. + visibility = room_config.get("visibility", "private") + preset_name = room_config.get( + "preset", + RoomCreationPreset.PRIVATE_CHAT + if visibility == "private" + else RoomCreationPreset.PUBLIC_CHAT, + ) + try: + preset_config = self._presets_dict[preset_name] + except KeyError: + raise SynapseError( + 400, f"'{preset_name}' is not a valid preset", errcode=Codes.BAD_JSON + ) + return preset_name, preset_config + def _generate_room_id(self) -> str: """Generates a random room ID. |