List private rooms if valid admin_key was provided. (#2161)

plugins/janus_videoroom.c

@@ -3546,13 +3546,28 @@ static json_t *janus_videoroom_process_synchronous_request(janus_videoroom_sessi
 		GHashTableIter iter;
 		gpointer value;
 		g_hash_table_iter_init(&iter, rooms);
+		gboolean lock_room_list = TRUE;
+		if(admin_key != NULL) {
+			json_t *admin_key_json = json_object_get(root, "admin_key");
+			/* Verify admin_key if it was provided */
+			if(admin_key_json != NULL && json_is_string(admin_key_json) && strlen(json_string_value(admin_key_json)) > 0) {
+				JANUS_CHECK_SECRET(admin_key, root, "admin_key", error_code, error_cause,
+					JANUS_VIDEOROOM_ERROR_MISSING_ELEMENT, JANUS_VIDEOROOM_ERROR_INVALID_ELEMENT, JANUS_VIDEOROOM_ERROR_UNAUTHORIZED);
+				if(error_code != 0) {
+					janus_mutex_unlock(&rooms_mutex);
+					goto prepare_response;
+				} else {
+					lock_room_list = FALSE;
+				}
+			}
+		}
 		while(g_hash_table_iter_next(&iter, NULL, &value)) {
 			janus_videoroom *room = value;
 			if(!room)
 				continue;
 			janus_refcount_increase(&room->ref);
-			if(room->is_private) {
-				/* Skip private room */
+			if(room->is_private && lock_room_list) {
+				/* Skip private room if no valid admin_key was provided */
 				JANUS_LOG(LOG_VERB, "Skipping private room '%s'\n", room->room_name);
 				janus_refcount_decrease(&room->ref);
 				continue;