/*

 * 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.Provider;

import java.security.SecureRandom;

import java.security.SecureRandomSpi;

import java.util.Map;

/*

 * @test

 * @bug 7004967

 * @summary SecureRandom should be more explicit about threading

 */

public class ThreadSafe {

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

        Provider p = new P();

        NoSync.test(SecureRandom.getInstance("S1", p), 5, 5);

        try {

            NoSync.test(SecureRandom.getInstance("S2", p), 5, 5);

            throw new Exception("Failed");

        } catch (RuntimeException re) {

            // Good

        }

        NoSync.test(SecureRandom.getInstance("S3", p), 5, 5);

        try {

            NoSync.test(SecureRandom.getInstance("S4", p), 5, 5);

            throw new Exception("Failed");

        } catch (RuntimeException re) {

            // Good

        }

    }

    public static class P extends Provider {

        public P() {

            super("P", 1.0d, "Haha");

            // Good. No attribute.

            put("SecureRandom.S1", S.class.getName());

            // Bad. Boasting ThreadSafe but isn't

            put("SecureRandom.S2", S.class.getName());

            put("SecureRandom.S2 ThreadSafe", "true");

            // Good. No attribute.

            putService(new Service(this, "SecureRandom", "S3",

                    S.class.getName(), null, null));

            // Bad. Boasting ThreadSafe but isn't

            putService(new Service(this, "SecureRandom", "S4",

                    S.class.getName(), null, Map.of("ThreadSafe", "true")));

        }

    }

    // This implementation is not itself thread safe.

    public static class S extends SecureRandomSpi {

        @java.lang.Override

        protected void engineSetSeed(byte[] seed) {

            return;

        }

        private volatile boolean inCall = false;

        @Override

        protected void engineNextBytes(byte[] bytes) {

            if (inCall) {

                throw new RuntimeException("IN CALL");

            }

            inCall = true;

            try {

                Thread.sleep(100);

            } catch (Exception e) {

                // OK

            }

            inCall = false;

        }

        @Override

        protected byte[] engineGenerateSeed(int numBytes) {

            return new byte[numBytes];

        }

    }

}