/*
 * 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("drbg");
        try {
            for (String mech : new String[]{"Hash_DRBG", "HMAC_DRBG", "CTR_DRBG"}) {
                System.out.println("Testing " + mech + "...");
                Security.setProperty("drbg", 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("drbg", old);
        }
    }
}