Java example source code file (KeyWrap.java)

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Java - Java tags/keywords

aes, cipher, crypto, exception, generalsecurityexception, keypair, keypairgenerator, keywrap, pkcs11test, privatekey, random, rsa, rsa\/ecb\/pkcs1padding, security, string, unwrapped, util

The KeyWrap.java Java example source code

/*
 * Copyright (c) 2005, 2007, 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
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

/**
 * @test
 * @bug 6231216
 * @summary Verify key wrapping (of extractable keys) works for RSA/PKCS1
 * @author Andreas Sterbenz
 * @library ..
 */

import java.io.*;
import java.util.*;

import java.security.*;

import javax.crypto.*;
import javax.crypto.spec.*;

public class KeyWrap extends PKCS11Test {

    public void main(Provider p) throws Exception {
        try {
            Cipher.getInstance("RSA/ECB/PKCS1Padding", p);
        } catch (GeneralSecurityException e) {
            System.out.println("Not supported by provider, skipping");
            return;
        }
        KeyPair kp;
        try {
            KeyPairGenerator kpg = KeyPairGenerator.getInstance("RSA", p);
            kpg.initialize(512);
            kp = kpg.generateKeyPair();
        } catch (Exception e) {
            try {
                System.out.println("Could not generate KeyPair on provider " + p + ", trying migration");
                KeyPairGenerator kpg = KeyPairGenerator.getInstance("RSA");
                kpg.initialize(512);
                kp = kpg.generateKeyPair();
                KeyFactory kf = KeyFactory.getInstance("RSA", p);
                PublicKey pub = (PublicKey)kf.translateKey(kp.getPublic());
                PrivateKey priv = (PrivateKey)kf.translateKey(kp.getPrivate());
                kp = new KeyPair(pub, priv);
            } catch (Exception ee) {
                ee.printStackTrace();
                System.out.println("Provider does not support RSA, skipping");
                return;
            }
        }
        System.out.println(kp);
        Random r = new Random();
        byte[] b = new byte[16];
        r.nextBytes(b);
        String alg = "AES";
        SecretKey key = new SecretKeySpec(b, alg);

        Cipher c = Cipher.getInstance("RSA/ECB/PKCS1Padding", p);
//      Cipher c = Cipher.getInstance("RSA/ECB/PKCS1Padding");
        c.init(Cipher.WRAP_MODE, kp.getPublic());
        byte[] wrapped = c.wrap(key);
        System.out.println("wrapped: " + wrapped.length);

        c.init(Cipher.UNWRAP_MODE, kp.getPrivate());
        Key unwrapped = c.unwrap(wrapped, alg, Cipher.SECRET_KEY);
        System.out.println("unwrapped: " + unwrapped);

        boolean eq = key.equals(unwrapped);
        System.out.println(eq);
        if (eq == false) {
            throw new Exception("Unwrapped key does not match original key");
        }
    }

    public static void main(String[] args) throws Exception {
        main(new KeyWrap());
    }

}