contentSignerBuilder.setProvider(BouncyCastleProviderHelper.PROVIDER_NAME);
if ((request.getIssuerPrivateKey() != null) && (request.getIssuerCertificate() != null)) {
builder = new JcaX509v3CertificateBuilder(request.getIssuerCertificate(), request.getSerialNumber(), request.getNotBefore(), request.getNotAfter(), request.getSubjectAsX500Principal(), request.getPublicKey());
builder.addExtension(X509Extension.authorityKeyIdentifier, false, new AuthorityKeyIdentifierStructure(request.getIssuerCertificate()));
contentSigner = contentSignerBuilder.build(request.getIssuerPrivateKey());
} else {
builder = new JcaX509v3CertificateBuilder(request.getIssuerAsX500Name(), request.getSerialNumber(), request.getNotBefore(), request.getNotAfter(), request.getSubjectAsX500Name(), request.getPublicKey());
contentSigner = contentSignerBuilder.build(request.getPrivateKey());
}