6

这就是我现在要生成的数字证书。现在我可以生成一个数字证书，其中包含受私钥保护的密码。

public static void main(String[] args) throws Exception {
    Security.addProvider(new BouncyCastleProvider());
    testKeyStore();
}

public static void testKeyStore() throws Exception {
    try {
        String storeName = "d://suresh_test.cer";
        java.security.KeyPairGenerator keyPairGenerator = KeyPairGenerator
                .getInstance("RSA");
        keyPairGenerator.initialize(2048);
        KeyPair keyPair = keyPairGenerator.generateKeyPair();
        PublicKey publicKey = keyPair.getPublic();
        PrivateKey privateKey = keyPair.getPrivate();
        X509Certificate trustCert = createCertificate("CN=CA", "CN=CA",
                publicKey, privateKey);
        java.security.cert.Certificate[] outChain = {
                createCertificate("CN=Client", "CN=CA", publicKey,
                        privateKey), trustCert };
        KeyStore outStore = KeyStore.getInstance("PKCS12");
        outStore.load(null, "suresh_".toCharArray());
        outStore.setKeyEntry("mykey", privateKey, "suresh_".toCharArray(),
                outChain);
        OutputStream outputStream = new FileOutputStream(storeName);
        outStore.store(outputStream, "suresh_".toCharArray());
        outputStream.flush();
        outputStream.close();

        KeyStore inStore = KeyStore.getInstance("PKCS12");
        inStore.load(new FileInputStream(storeName),
                "suresh_".toCharArray());
    } catch (Exception e) {
        e.printStackTrace();
        throw new AssertionError(e.getMessage());
    }
}

private static X509Certificate createCertificate(String dn, String issuer,
        PublicKey publicKey, PrivateKey privateKey) throws Exception {
    X509V3CertificateGenerator certGenerator = new X509V3CertificateGenerator();
    certGenerator.setSerialNumber(BigInteger.valueOf(Math.abs(new Random()
            .nextLong())));
    certGenerator.setIssuerDN(new X509Name(dn));
    certGenerator.setSubjectDN(new X509Name(dn));
    certGenerator.setIssuerDN(new X509Name(issuer)); // Set issuer!
    certGenerator.setNotBefore(Calendar.getInstance().getTime());
    certGenerator.setNotAfter(Calendar.getInstance().getTime());
    certGenerator.setPublicKey(publicKey);
    certGenerator.setSignatureAlgorithm("SHA1WithRSAEncryption");
    X509Certificate certificate = (X509Certificate) certGenerator.generate(
            privateKey, "BC");
    return certificate;
}

如何让它自我签名？

我没有线索。

我该如何进行呢？

感谢您的任何提示。

4

2 回答 2

4

您拥有生成自签名证书所需的所有代码。您只需要确保您的链仅包含一个证书。

public static void testKeyStore() throws Exception {
  try {
    String storeName = "path/to/store";
    java.security.KeyPairGenerator keyPairGenerator = KeyPairGenerator
        .getInstance("RSA");
    keyPairGenerator.initialize(2048);
    KeyPair keyPair = keyPairGenerator.generateKeyPair();
    PublicKey publicKey = keyPair.getPublic();
    PrivateKey privateKey = keyPair.getPrivate();
    X509Certificate selfCert = createCertificate("CN=Client", "CN=Client",
        publicKey, privateKey);

    // Note: if you just want to store this certificate then write the
    // contents of selfCert.getEncoded() to file

    java.security.cert.Certificate[] outChain = { selfCert };
    KeyStore outStore = KeyStore.getInstance("PKCS12");
    outStore.load(null, PASSWORD.toCharArray());
    outStore.setKeyEntry("mykey", privateKey, PASSWORD.toCharArray(),
        outChain);
    OutputStream outputStream = new FileOutputStream(storeName);
    outStore.store(outputStream, PASSWORD.toCharArray());
    outputStream.flush();
    outputStream.close();

    KeyStore inStore = KeyStore.getInstance("PKCS12");
    inStore.load(new FileInputStream(storeName), PASSWORD.toCharArray());
  } catch (Exception e) {
    e.printStackTrace();
    throw new AssertionError(e.getMessage());
  }
}

我建议你不要扔AssertionError. 这仅应由 Java 本身用于指示assert语句为假。

于 2013-10-16T07:41:31.660 回答
3

在度过周末将我们的 BC 版本从 143 移植到 154 之后，我发布了经验教训，希望它可以为将来的某人节省一些时间。

1) 来自 BC 的 PKI eXtention API 已移至其自己的 jar。在 bcprov-jdk15on-154.jar 中找到 PemParser 时，我头疼不已。PemParser 的实现在 bcpkix-jdk15on-154.jar 中。不用说 pkix jar 依赖于核心 bc jar。

2) PEMReader 类在最新的 154 版本中不可用。这已被 PemParser 取代。

3) 从磁盘上的文件中读取公共证书：

Security.addProvider(new BouncyCastleProvider());
File file = new File("c:/mycert.crt");
X509Certificate cert = null;
PEMParser pemParser = new PEMParser(new FileReader(file));
Object object = pemParser.readObject();
if (object instanceof X509CertificateHolder) {
    X509CertificateHolder holder = (X509CertificateHolder)object;
    cert = new JcaX509CertificateConverter().setProvider("BC").getCertificate(holder);
}
if (cert == null) {
    throw new Exception("mycert.crt" + " doesn't contain X509Certificate!");
}
return cert;
//If you need publicKey use cert.getPublicKey() method.

4) 从磁盘读取受密码保护的私钥：

Security.addProvider(new BouncyCastleProvider());
KeyPair keyPair = null;
File file = new File("c:/myprivate.key");
PEMParser pemParser = new PEMParser(new FileReader(file));
Object object = pemParser.readObject();
if (object instanceof PEMEncryptedKeyPair) {
    JcaPEMKeyConverter converter = new JcaPEMKeyConverter().setProvider("BC");
    PEMEncryptedKeyPair ckp = (PEMEncryptedKeyPair) object;
    PEMDecryptorProvider decProv =
            new JcePEMDecryptorProviderBuilder().build("strongpasswordfor_myprivate.key".toCharArray());
    keyPair = converter.getKeyPair(ckp.decryptKeyPair(decProv));
}
return keyPair;
//Once we have the keypair, we can get keyPair.getPrivate() [PrivateKey.class] 
//or keyPair.getPublic() [PublicKey.class]

5) 读取基于字符串的证书，这通常是我们想要进行 SSL 相互身份验证的情况，并让网络服务器在 Http 请求标头中将客户端证书转发到应用程序服务器：

Security.addProvider(new BouncyCastleProvider());
X509Certificate cert = null;
    String myClientCert = "-----BEGIN CERTIFICATE----- CERTCONTENTS -----END CERTIFICATE-----"
    String cert1 = myClientCert.replaceAll("-----BEGIN CERTIFICATE-----", "").replaceAll("-----END CERTIFICATE-----", "").replaceAll(" ", System.lineSeparator());
    int ind = cert1.lastIndexOf(System.lineSeparator());
    cert1 = new StringBuilder(cert1).replace(ind, ind + System.lineSeparator().length(), "").toString();
    cert1 = BEGIN_CERT  + cert1 + END_CERT;
    PEMParser pemParser = new PEMParser(new StringReader(cert1));
    Object object = pemParser.readObject();
    if (object instanceof X509CertificateHolder) {
        X509CertificateHolder holder = (X509CertificateHolder)object;
        cert = new JcaX509CertificateConverter().setProvider("BC").getCertificate(holder);
    }
    return cert;

6) 不用说，根据您的喜好添加错误处理、异常管理和清理。

于 2016-03-06T18:29:56.983 回答