/*

 * Copyright (c) 2015, 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

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

// SunJSSE does not support dynamic system properties, no way to re-use

// system properties in samevm/agentvm mode.

/*

 * @test

 * @bug 8043758

 * @summary Datagram Transport Layer Security (DTLS)

 * @modules java.base/sun.security.util

 * @build DTLSOverDatagram

 * @run main/othervm InvalidCookie

 */

import java.net.DatagramPacket;

import java.net.SocketAddress;

/**

 * Test that if the handshake cookie in client side is incorrect, the handshake

 * process can continue as if the client does not use cookie.

 */

public class InvalidCookie extends DTLSOverDatagram {

    boolean needInvalidCookie = true;

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

        InvalidCookie testCase = new InvalidCookie();

        testCase.runTest(testCase);

    }

    @Override

    DatagramPacket createHandshakePacket(byte[] ba, SocketAddress socketAddr) {

        if (needInvalidCookie && (ba.length >= 60) &&

                (ba[0] == (byte)0x16) && (ba[13] == (byte)0x03)) {

            // HelloVerifyRequest

            needInvalidCookie = false;

            System.out.println("invalidate handshake verify cookie");

            if (ba[ba.length - 1] == (byte)0xFF) {

                ba[ba.length - 1] = (byte)0xFE;

            } else {

                ba[ba.length - 1] = (byte)0xFF;

            }

        }

        return super.createHandshakePacket(ba, socketAddr);

    }

}