/*

 * Copyright (c) 1998, 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 0000000

 * @summary MacClone

 * @author Jan Luehe

 */

import javax.crypto.*;

public class MacClone {

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

        //

        // Clone uninitialized Mac object

        //

        Mac mac = Mac.getInstance("HmacSHA1", "SunJCE");

        Mac macClone = (Mac)mac.clone();

        System.out.println(macClone.getProvider().toString());

        System.out.println(macClone.getAlgorithm());

        boolean thrown = false;

        try {

            macClone.update((byte)0x12);

        } catch (IllegalStateException ise) {

            thrown = true;

        }

        if (!thrown) {

            throw new Exception("Expected IllegalStateException not thrown");

        }

        //

        // Clone initialized Mac object

        //

        KeyGenerator kgen = KeyGenerator.getInstance("DES");

        SecretKey skey = kgen.generateKey();

        mac = Mac.getInstance("HmacSHA1");

        mac.init(skey);

        macClone = (Mac)mac.clone();

        System.out.println(macClone.getProvider().toString());

        System.out.println(macClone.getAlgorithm());

        mac.update((byte)0x12);

        macClone.update((byte)0x12);

        byte[] macFinal = mac.doFinal();

        byte[] macCloneFinal = macClone.doFinal();

        if (!java.util.Arrays.equals(macFinal, macCloneFinal)) {

            throw new Exception("MAC results are different");

        }

    }

}