/*

 * Copyright (c) 2016, 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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 */

import java.security.SecureRandom;

import java.security.Security;

/**

 * @test

 * @bug 8051408

 * @summary make sure nextBytes etc can be called before setSeed

 */

public class AutoReseed {

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

        SecureRandom sr;

        String old = Security.getProperty("securerandom.drbg.config");

        try {

            for (String mech :

                    new String[]{"Hash_DRBG", "HMAC_DRBG", "CTR_DRBG"}) {

                System.out.println("Testing " + mech + "...");

                Security.setProperty("securerandom.drbg.config", mech);

                // Check auto reseed works

                sr = SecureRandom.getInstance("DRBG");

                sr.nextInt();

                sr = SecureRandom.getInstance("DRBG");

                sr.reseed();

                sr = SecureRandom.getInstance("DRBG");

                sr.generateSeed(10);

            }

        } finally {

            Security.setProperty("securerandom.drbg.config", old);

        }

    }

}