/*

 * Copyright (c) 2010, 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.

 *

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 */

/**

 * @test

 * @bug 6837847

 * @summary Ensure a deserialized PKCS#11 SecureRandom is functional.

 * @library ..

 */

import java.security.*;

import java.io.*;

public class TestDeserialization extends PKCS11Test {

    public void main(Provider p) throws Exception {

        // Skip this test for providers not found by java.security.Security

        if (Security.getProvider(p.getName()) != p) {

            System.out.println("Skip test for provider " + p.getName());

            return;

        }

        SecureRandom r;

        try {

            r = SecureRandom.getInstance("PKCS11", p);

            System.out.println("SecureRandom instance " + r);

        } catch (NoSuchAlgorithmException e) {

            System.out.println("Provider " + p +

                               " does not support SecureRandom, skipping");

            e.printStackTrace();

            return;

        }

        r.setSeed(System.currentTimeMillis());

        byte[] buf = new byte[16];

        byte[] ser = toByteArray(r);

        System.out.println("Serialized Len = " + ser.length);

        SecureRandom r2 = fromByteArray(ser);

        System.out.println("Deserialized into " + r2);

        r2.nextBytes(buf);

        System.out.println("Done");

    }

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

        main(new TestDeserialization());

    }

    private byte[] toByteArray(SecureRandom r) throws Exception {

        ByteArrayOutputStream out = new ByteArrayOutputStream(1024);

        ObjectOutputStream outStream = null;

        try {

            outStream = new ObjectOutputStream(out);

            outStream.writeObject(r);

            return out.toByteArray();

        } finally {

            if (outStream != null) {

                outStream.close();

            }

        }

    }

    private SecureRandom fromByteArray(byte[] buf) throws Exception {

        SecureRandom r = null;

        ByteArrayInputStream is = new ByteArrayInputStream(buf);

        ObjectInputStream ois = null;

        try {

            ois = new ObjectInputStream(is);

            r = (SecureRandom) ois.readObject();

        } finally {

            if (ois != null) {

                ois.close();

            }

        }

        return r;

    }

}