long tim = buildFromResourcesSupport( new JarOutputStream( baos ),class_loader,resource_prefix,resource_names );
try{
// leave this check in here as we might as well check for the alias
SEKeyDetails kd = SESecurityManager.getKeyDetails( sign_alias );
if ( kd == null ){
Logger.log(new LogAlert(LogAlert.UNREPEATABLE, LogAlert.AT_ERROR,
"Certificate alias '" + sign_alias
+ "' not found, jar signing fails"));