/*

 * Copyright (c) 2002, 2003, 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 4716321

 * @summary Ensure the random source supplied in

 * Signature.initSign(PrivateKey, SecureRandom) is used.

 */

import java.security.*;

public class TestInitSignWithMyOwnRandom {

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

        // any signature implementation will do as long as

        // it needs a random source

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

        KeyPairGenerator kpg = KeyPairGenerator.getInstance("DSA", p);

        kpg.initialize(512);

        KeyPair kp = kpg.generateKeyPair();

        TestRandomSource rand = new TestRandomSource();

        Signature sig = Signature.getInstance("DSA", p);

        sig.initSign(kp.getPrivate(), rand);

        sig.update(new byte[20]);

        sig.sign();

        if (rand.isUsed()) {

            System.out.println("Custom random source is used.");

        } else {

            throw new Exception("Custom random source is not used");

        }

    }

}

class TestRandomSource extends SecureRandom {

    int count = 0;

    public int nextInt() {

        count++;

        return 0;

    }

    public boolean isUsed() {

        return (count != 0);

    }

}