public class Handler extends
  WSBA_CanalOtros_validarClaveAudioHttpServiceCallbackHandler implements
  CallbackHandler {

 @Override
 public void handle(Callback[] callbacks) throws IOException,
   UnsupportedCallbackException {
  for (int i = 0; i < callbacks.length; i++) {
   WSPasswordCallback pwcb = (WSPasswordCallback) callbacks[i];
   String id = pwcb.getIdentifer();
   int usage = pwcb.getUsage();
   if (usage == WSPasswordCallback.DECRYPT
     || usage == WSPasswordCallback.SIGNATURE) {

    // used to retrieve password for private key
    if ("firmadoavvillas".equals(id)) {
     pwcb.setPassword("firmadoavvillas");
    }

   }
  }

 }

}