private void sign() {
try {
BouncyCastleCertProcessingFactory factory = BouncyCastleCertProcessingFactory
.getDefault();
X509ExtensionSet extSet = null;
// if (proxyCertInfo != null) {
// extSet = new X509ExtensionSet();
// if (CertUtil.isGsi4Proxy(proxyType)) {
// // RFC compliant OID