我需要沿着公共证书创建公钥和私钥。我可以使用以下代码生成自签名证书...
KeyPairGenerator keyPairGenerator = KeyPairGenerator.getInstance("RSA");
keyPairGenerator.initialize(1024);
KeyPair KPair = keyPairGenerator.generateKeyPair();
PrivateKey privkey = KPair.getPrivate();
X509CertInfo info = new X509CertInfo();
Date from = new Date();
Date to = new Date(from.getTime() + days * 86400000l);
CertificateValidity interval = new CertificateValidity(from, to);
BigInteger sn = new BigInteger(64, new SecureRandom());
X500Name owner = new X500Name(dn);
info.set(X509CertInfo.VALIDITY, interval);
info.set(X509CertInfo.SERIAL_NUMBER, new CertificateSerialNumber(sn));
info.set(X509CertInfo.SUBJECT, new CertificateSubjectName(owner));
info.set(X509CertInfo.ISSUER, new CertificateIssuerName(owner));
info.set(X509CertInfo.KEY, new CertificateX509Key(pair.getPublic()));
info.set(X509CertInfo.VERSION, new CertificateVersion(CertificateVersion.V3));
AlgorithmId algo = new AlgorithmId(AlgorithmId.md5WithRSAEncryption_oid);
info.set(X509CertInfo.ALGORITHM_ID, new CertificateAlgorithmId(algo));
// Sign the cert to identify the algorithm that's used.
X509CertImpl cert = new X509CertImpl(info);
cert.sign(privkey, algorithm);
// Update the algorith, and resign.
algo = (AlgorithmId)cert.get(X509CertImpl.SIG_ALG);
info.set(CertificateAlgorithmId.NAME + "." + CertificateAlgorithmId.ALGORITHM, algo);
cert = new X509CertImpl(info);
cert.sign(privkey, algorithm);
现在我需要使用密钥库或任何其他方式保存私钥和公钥,以便我可以检索那些用于签署任何文件或对象的密钥。我尝试使用简单的文件流,但它给了我错误,似乎它不是正确的方法。请指导我下一步该怎么做。我想使用证书和私钥来签署一些数据,我想保存它们以便我可以随时使用验证。