/*

 * Copyright 2002-2003 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

 * CA 95054 USA or visit www.sun.com if you need additional information or

 * have any questions.

 */

/**

 * @test

 * @bug 4775971

 * @summary test the clone implementation of SHA, SHA-256,

 *          SHA-384, SHA-512 MessageDigest implementation.

 */

import java.security.*;

import java.util.*;

public class TestSHAClone {

    private static final String[] ALGOS = {

        "SHA", "SHA-256", "SHA-512", "SHA-384"

    };

    private static byte[] input1 = {

        (byte)0x1, (byte)0x2,  (byte)0x3

    };

    private static byte[] input2 = {

        (byte)0x4, (byte)0x5,  (byte)0x6

    };

    private MessageDigest md;

    private TestSHAClone(String algo, Provider p) throws Exception {

        md = MessageDigest.getInstance(algo, p);

    }

    private void run() throws Exception {

        md.update(input1);

        MessageDigest md2 = (MessageDigest) md.clone();

        md.update(input2);

        md2.update(input2);

        if (!Arrays.equals(md.digest(), md2.digest())) {

            throw new Exception(md.getAlgorithm() + ": comparison failed");

        } else {

            System.out.println(md.getAlgorithm() + ": passed");

        }

    }

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

        Provider p = Security.getProvider("SUN");

        for (int i=0; i<ALGOS.length; i++) {

            TestSHAClone test = new TestSHAClone(ALGOS[i], p);

            test.run();

        }

    }

}