// Make user and ocspTestCert that we know...
createUserCert(ecdsacaid);
// And an OCSP request
OCSPReqGenerator gen = new OCSPReqGenerator();
gen.addRequest(new CertificateID(CertificateID.HASH_SHA1, ecdsacacert, ocspTestCert.getSerialNumber()));
Hashtable exts = new Hashtable();
X509Extension ext = new X509Extension(false, new DEROctetString("123456789".getBytes()));
exts.put(OCSPObjectIdentifiers.id_pkix_ocsp_nonce, ext);
gen.setRequestExtensions(new X509Extensions(exts));
OCSPReq req = gen.generate();