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 * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

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 */

// program to generate rsakeys.ks. does not need to run during testing

// checked into the workspace so that the keystore file can be recreated

// in the future if needed.

// @author Andreas Sterbenz

import java.io.*;

import java.math.BigInteger;

import java.util.*;

import java.security.*;

import java.security.cert.*;

import java.security.interfaces.*;

import java.security.spec.*;

import sun.security.x509.*;

public class GenKeyStore {

    static final char[] password = "test12".toCharArray();

    private static X509Certificate getCertificate(String suffix, PublicKey publicKey, PrivateKey privateKey) throws Exception {

        X500Name name = new X500Name("CN=Dummy Certificate " + suffix);

        String algorithm = "SHA1with" + publicKey.getAlgorithm();

        Date date = new Date();

        AlgorithmId algID = AlgorithmId.getAlgorithmId(algorithm);

        X509CertInfo certInfo = new X509CertInfo();

        certInfo.set(X509CertInfo.VERSION, new CertificateVersion(CertificateVersion.V1));

        certInfo.set(X509CertInfo.SERIAL_NUMBER, new CertificateSerialNumber(1));

        certInfo.set(X509CertInfo.ALGORITHM_ID, new CertificateAlgorithmId(algID));

        certInfo.set(X509CertInfo.SUBJECT, name);

        certInfo.set(X509CertInfo.ISSUER, name);

        certInfo.set(X509CertInfo.KEY, new CertificateX509Key(publicKey));

        certInfo.set(X509CertInfo.VALIDITY, new CertificateValidity(date, date));

        X509CertImpl cert = new X509CertImpl(certInfo);

        cert.sign(privateKey, algorithm);

        return cert;

    }

    private static void addToKeyStore(KeyStore ks, KeyPair kp, String name) throws Exception {

        PublicKey pubKey = kp.getPublic();

        PrivateKey privKey = kp.getPrivate();

        X509Certificate cert = getCertificate(name, pubKey, privKey);

        ks.setKeyEntry(name, privKey, password, new X509Certificate[] {cert});

    }

    private static void generateKeyPair(KeyStore ks, int keyLength, String alias) throws Exception {

        System.out.println("Generating " + keyLength + " keypair " + alias + "...");

        KeyPairGenerator kpg = KeyPairGenerator.getInstance("RSA", "SunRsaSign");

        kpg.initialize(keyLength);

        KeyPair kp = kpg.generateKeyPair();

        addToKeyStore(ks, kp, alias);

    }

    static KeyStore ks;

    public static void main(String[] args) throws Exception {

        long start = System.currentTimeMillis();

        KeyStore ks = KeyStore.getInstance("JKS");

        ks.load(null, null);

        generateKeyPair(ks, 512, "rsa512a");

        generateKeyPair(ks, 512, "rsa512b");

        generateKeyPair(ks, 1024, "rsa1024a");

        generateKeyPair(ks, 1024, "rsa1024b");

        generateKeyPair(ks, 2048, "rsa2048a");

        generateKeyPair(ks, 2048, "rsa2048b");

        generateKeyPair(ks, 4096, "rsa4096a");

        // only one 4096 bit keys and none longer than that

        // that would slow down the other tests too much

        // on old machines

//      generateKeyPair(ks, 4096, "rsa4096b");

//      generateKeyPair(ks, 8192, "rsa8192a");

//      generateKeyPair(ks, 8192, "rsa8192b");

        OutputStream out = new FileOutputStream("rsakeys.ks");

        ks.store(out, password);

        out.close();

        long stop = System.currentTimeMillis();

        System.out.println("Done (" + (stop - start) + " ms).");

    }

}