/*

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 * 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.

 *

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 */

/*

 * @test

 * @bug 4856966

 * @summary

 * @author Andreas Sterbenz

 * @library ..

 * @key randomness

 * @run main/othervm ReinitDigest

 * @run main/othervm ReinitDigest sm

 */

import java.security.MessageDigest;

import java.security.Provider;

import java.util.Arrays;

import java.util.Random;

public class ReinitDigest extends PKCS11Test {

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

        main(new ReinitDigest(), args);

    }

    @Override

    public void main(Provider p) throws Exception {

        if (p.getService("MessageDigest", "MD5") == null) {

            System.out.println("Provider does not support MD5, skipping");

            return;

        }

        Random r = new Random();

        byte[] data1 = new byte[10 * 1024];

        byte[] data2 = new byte[10 * 1024];

        r.nextBytes(data1);

        r.nextBytes(data2);

        MessageDigest md;

        md = MessageDigest.getInstance("MD5", "SUN");

        byte[] d1 = md.digest(data1);

        md = MessageDigest.getInstance("MD5", p);

        byte[] d2 = md.digest(data1);

        check(d1, d2);

        byte[] d3 = md.digest(data1);

        check(d1, d3);

        md.update(data2);

        md.update((byte)0);

        md.reset();

        byte[] d4 = md.digest(data1);

        check(d1, d4);

        System.out.println("All tests passed");

    }

    private static void check(byte[] d1, byte[] d2) throws Exception {

        if (Arrays.equals(d1, d2) == false) {

            throw new RuntimeException("Digest mismatch");

        }

    }

}