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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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/*
 * @test
 * @bug 0000000
 * @library /test/lib
 * @summary DHKeyFactory
 * @author Jan Luehe
 */

import java.io.*;
import java.math.BigInteger;
import java.security.*;
import java.security.spec.*;
import java.security.interfaces.*;
import javax.crypto.*;
import javax.crypto.spec.*;
import javax.crypto.interfaces.*;
import jdk.test.lib.security.DiffieHellmanGroup;
import jdk.test.lib.security.SecurityUtils;

/**
 * This test creates a DH keypair, retrieves the encodings of the DH public and
 * private key, and feeds those encodings to a DH key factory, which parses
 * the encodings and creates a DH public and private key from them.
 */

public class DHKeyFactory {

    private DHKeyFactory() {}

    public static void main(String argv[]) throws Exception {
            DHKeyFactory test = new DHKeyFactory();
            test.run();
            System.out.println("Test Passed");
    }

    private void run() throws Exception {

        DiffieHellmanGroup dhGroup = SecurityUtils.getTestDHGroup();
        DHParameterSpec dhParamSpec = new DHParameterSpec(dhGroup.getPrime(), dhGroup.getBase());
        System.out.println("Using " + dhGroup.name() + " Diffie-Hellman parameters");

        KeyPairGenerator kpgen = KeyPairGenerator.getInstance("DH",
                                    System.getProperty("test.provider.name", "SunJCE"));
        kpgen.initialize(dhParamSpec);
        KeyPair kp = kpgen.generateKeyPair();

        // get the public key encoding
        byte[] pubKeyEnc = kp.getPublic().getEncoded();

        // get the private key encoding
        byte[] privKeyEnc = kp.getPrivate().getEncoded();

        KeyFactory kfac = KeyFactory.getInstance("DH",
                                System.getProperty("test.provider.name", "SunJCE"));

        X509EncodedKeySpec x509KeySpec = new X509EncodedKeySpec(pubKeyEnc);
        PublicKey pubKey = kfac.generatePublic(x509KeySpec);

        PKCS8EncodedKeySpec pkcsKeySpec = new PKCS8EncodedKeySpec(privKeyEnc);
        PrivateKey privKey = kfac.generatePrivate(pkcsKeySpec);
    }
}