從JKS KeyStore讀回ECPrivateKey

Question

我正在嘗試從JKS KeyStore讀回ECPrivateKey （包括證書鏈），如下面的代碼所示。

String storeType = "JKS", storePass = "secret", storePath = "c:/keystore.ks";
ECNamedCurveParameterSpec bcParamSpec = ECNamedCurveTable.getParameterSpec("brainpoolp224r1");
ECNamedCurveSpec jceParamSpec = new ECNamedCurveSpec(bcParamSpec.getName(), bcParamSpec.getCurve(), bcParamSpec.getG(), bcParamSpec.getN(), bcParamSpec.getH(), bcParamSpec.getSeed());

KeyPairGenerator keyPairGenerator = KeyPairGenerator.getInstance("EC");
keyPairGenerator.initialize(jceParamSpec);
KeyPair keyPair = keyPairGenerator.generateKeyPair();
ECPublicKey publicKey = (ECPublicKey)keyPair.getPublic();
ECPrivateKey privateKey = (ECPrivateKey)keyPair.getPrivate();

Certificate trustCert =  createX509Certificate("CN=CA", "CN=CA", publicKey, privateKey, "SHA224withECDSA");
Certificate[] chain = { createX509Certificate("CN=Client", "CN=CA", publicKey, privateKey, "SHA224withECDSA"), trustCert };

KeyStore keyStore = KeyStore.getInstance(storeType);
keyStore.load(null, storePass.toCharArray());
keyStore.setKeyEntry("eckey", privateKey, storePass.toCharArray(), chain);

FileOutputStream outputStream = new FileOutputStream(storePath);
keyStore.store(outputStream, storePass.toCharArray());
outputStream.close();

/* Now read it back */
FileInputStream inputStream = new FileInputStream(storePath);
KeyStore keyStore2 = KeyStore.getInstance(storeType);
keyStore2.load(inputStream, storePass.toCharArray());

Key privateKey2 = keyStore2.getKey("eckey", storePass.toCharArray());

Sun / Oracle安全提供程序不支持我使用的曲線，因此我使用的是Bouncy Castle。 BC插入了我的安全提供程序列表中的位置0。 存儲工作正常，回讀失敗：

java.security.UnrecoverableKeyException: Unknown named curve: 1.3.36.3.3.2.8.1.1.5
    at sun.security.provider.KeyProtector.recover(KeyProtector.java:338)
at sun.security.provider.JavaKeyStore.engineGetKey(JavaKeyStore.java:138)
at sun.security.provider.JavaKeyStore$JKS.engineGetKey(JavaKeyStore.java:55)
at java.security.KeyStore.getKey(KeyStore.java:792)

顯然，JKS KeyStore實現不會在安全提供程序列表中循環。 但是，這對於BC支持的其他KeyStore類型也可以正常工作： PKCS12和BKS 。 有一種方法可以在使用BC恢復密鑰時將JKS用作KeyStore類型？

上面的代碼中使用的createX509Certificate方法由以下代碼給出：

private static X509Certificate createX509Certificate(String dn, String issuer, PublicKey publicKey, PrivateKey privateKey, String sigAlg) throws Exception {
    X509V3CertificateGenerator certGenerator = new X509V3CertificateGenerator();
certGenerator.setSerialNumber(BigInteger.valueOf(Math.abs(new Random().nextLong())));
certGenerator.setIssuerDN(new X509Name(issuer));
    certGenerator.setSubjectDN(new X509Name(dn));
    certGenerator.setNotBefore(Calendar.getInstance().getTime());
certGenerator.setNotAfter(Calendar.getInstance().getTime());
certGenerator.setPublicKey(publicKey);
certGenerator.setSignatureAlgorithm(sigAlg);
X509Certificate certificate = (X509Certificate)certGenerator.generate(privateKey, "BC");
return certificate;
}

Answer 1

我唯一的想法是實現自己的提供程序 ，該提供程序可以將“ KeyFactory”請求代理給BouncyCastle提供者，其余的代理給另一個了解JKS的代理，或者將所有請求都代理給BouncyCastle，但“ KeyStore”請求除外。 這是有關如何實現提供程序的文檔。