registrar: check empty password

kamailio/registrar-role.cfg

@@ -79,22 +79,26 @@ route[ATTEMPT_AUTHORIZATION]
     } else {
         $var(amqp_payload_request) = "{'Event-Category' : 'directory' , 'Event-Name' : 'authn_req', 'Method' : 'REGISTER', 'Auth-Realm' : '" + $fd + "', 'Auth-User' : '" + $fU + "', 'From' : '" + $fu + "', 'To' : '" + $tu +"' }";
         $var(amqp_routing_key) = "authn.req." + $(fd{kz.encode});
-        sl_send_reply("100", "Attempting K query");
+        sl_send_reply("100", "Attempting registrar query");
         if(kazoo_query("callmgr", $var(amqp_routing_key), $var(amqp_payload_request))) {
             $var(password) = $(kzR{kz.json,Auth-Password});
             $xavp(ulattrs=>custom_channel_vars) = $(kzR{kz.json,Custom-Channel-Vars});
-            xlog("L_INFO", "$ci|log|authenticating $Au via Kazoo query response");
+            xlog("L_INFO", "$ci|log|authenticating $Au via registrar query response");
         } else {
-            xlog("L_INFO", "$ci|log|failed to query Kazoo for authentication credentials for $Au $si:$sp");
+            xlog("L_INFO", "$ci|log|failed to query registrar for authentication credentials for $Au $si:$sp");
             append_to_reply("Retry-After: 60\r\n");
             sl_send_reply("500", "Retry Later");
             exit;
         }
     }
 
-    if($var(password) == $null) {
+    if($var(password) == $null || $var(password) == "") {
+        #!ifdef ANTIFLOOD-ROLE
+        route(ANITFLOOD_FAILED_AUTH);
+        #!endif
+        
         auth_challenge("$fd", "0");
-        xlog("L_INFO", "$ci|end|issued auth challenge to registration attempt for $Au $si:$sp");
+        xlog("L_INFO", "$ci|end|issued auth challenge to registration attempt for $Au $si:$sp due to empty password");
         exit;
     }