new SubjectKeyIdentifierStructure(pubKey));
v3CertGen.addExtension(X509Extensions.AuthorityKeyIdentifier, false,
new AuthorityKeyIdentifierStructure(caCert.getPublicKey()));
v3CertGen.addExtension(X509Extensions.BasicConstraints, true,
new BasicConstraints(0));
// X509Certificate cert = v3CertGen.generateX509Certificate(caPrivKey);
final X509Certificate cert = v3CertGen.generate(caPriKey, "BC");
cert.checkValidity(new Date());