/*

 * Copyright (c) 2018, 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

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 */

/**

 * @test

 * @bug     8211049

 * @summary make sure the supplied SecureRandom object is used

 */

import java.security.*;

import java.security.interfaces.*;

public class TestKeyPairGeneratorInit {

    private static class MySecureRandom extends SecureRandom {

        boolean isUsed = false;

        public MySecureRandom() {

            super();

        }

        public void nextBytes(byte[] bytes) {

            isUsed = true;

            super.nextBytes(bytes);

        }

    }

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

        KeyPairGenerator kpg =

            KeyPairGenerator.getInstance("RSA", "SunRsaSign");

        MySecureRandom rnd = new MySecureRandom();

        kpg.initialize(2048, rnd);

        System.out.println("Generate keypair then check");

        KeyPair kp = kpg.generateKeyPair();

        if (!rnd.isUsed) {

            throw new RuntimeException("ERROR: Supplied random not used");

        } else {

            System.out.println("=> Test passed");

        }

    }

}