/*

 * Copyright (c) 2015, 2018, 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.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * 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.

 */

package sun.security.ssl;

import java.io.IOException;

import java.nio.ByteBuffer;

import sun.security.ssl.SSLHandshake.HandshakeMessage;

/**

 * Pack of the ServerHelloDone handshake message.

 */

final class ServerHelloDone {

    static final SSLConsumer handshakeConsumer =

        new ServerHelloDoneConsumer();

    static final HandshakeProducer handshakeProducer =

        new ServerHelloDoneProducer();

    /**

     * The ServerHelloDone handshake message.

     */

    static final class ServerHelloDoneMessage extends HandshakeMessage {

        ServerHelloDoneMessage(HandshakeContext handshakeContext) {

            super(handshakeContext);

        }

        ServerHelloDoneMessage(HandshakeContext handshakeContext,

                ByteBuffer m) throws IOException {

            super(handshakeContext);

            if (m.hasRemaining()) {

                handshakeContext.conContext.fatal(Alert.ILLEGAL_PARAMETER,

                    "Error parsing ServerHelloDone message: not empty");

            }

        }

        @Override

        public SSLHandshake handshakeType() {

            return SSLHandshake.SERVER_HELLO_DONE;

        }

        @Override

        public int messageLength() {

            return 0;

        }

        @Override

        public void send(HandshakeOutStream s) throws IOException {

            // empty, nothing to send

        }

        @Override

        public String toString() {

            return "<empty>";

        }

    }

    /**

     * The "ServerHelloDone" handshake message producer.

     */

    private static final

            class ServerHelloDoneProducer implements HandshakeProducer {

        // Prevent instantiation of this class.

        private ServerHelloDoneProducer() {

            // blank

        }

        @Override

        public byte[] produce(ConnectionContext context,

                HandshakeMessage message) throws IOException {

            // The producing happens in server side only.

            ServerHandshakeContext shc = (ServerHandshakeContext)context;

            ServerHelloDoneMessage shdm = new ServerHelloDoneMessage(shc);

            if (SSLLogger.isOn && SSLLogger.isOn("ssl,handshake")) {

                SSLLogger.fine(

                        "Produced ServerHelloDone handshake message", shdm);

            }

            // Output the handshake message.

            shdm.write(shc.handshakeOutput);

            shc.handshakeOutput.flush();

            //

            // update

            //

            shc.handshakeConsumers.put(SSLHandshake.CLIENT_KEY_EXCHANGE.id,

                    SSLHandshake.CLIENT_KEY_EXCHANGE);

            shc.conContext.consumers.put(ContentType.CHANGE_CIPHER_SPEC.id,

                    ChangeCipherSpec.t10Consumer);

            shc.handshakeConsumers.put(SSLHandshake.FINISHED.id,

                    SSLHandshake.FINISHED);

            // The handshake message has been delivered.

            return null;

        }

    }

    /**

     * The "ServerHelloDone" handshake message consumer.

     */

    private static final

            class ServerHelloDoneConsumer implements SSLConsumer {

        // Prevent instantiation of this class.

        private ServerHelloDoneConsumer() {

            // blank

        }

        @Override

        public void consume(ConnectionContext context,

                ByteBuffer message) throws IOException {

            // The consuming happens in client side only.

            ClientHandshakeContext chc = (ClientHandshakeContext)context;

            // clean up this consumer

            chc.handshakeConsumers.clear();

            ServerHelloDoneMessage shdm =

                    new ServerHelloDoneMessage(chc, message);

            if (SSLLogger.isOn && SSLLogger.isOn("ssl,handshake")) {

                SSLLogger.fine(

                        "Consuming ServerHelloDone handshake message", shdm);

            }

            //

            // validate

            //

            // blank

            //

            // update

            //

            chc.handshakeProducers.put(SSLHandshake.CLIENT_KEY_EXCHANGE.id,

                    SSLHandshake.CLIENT_KEY_EXCHANGE);

            chc.handshakeProducers.put(SSLHandshake.FINISHED.id,

                    SSLHandshake.FINISHED);

            //

            // produce

            //

            SSLHandshake[] probableHandshakeMessages = new SSLHandshake[] {

                // full handshake messages

                SSLHandshake.CERTIFICATE,

                SSLHandshake.CLIENT_KEY_EXCHANGE,

                SSLHandshake.CERTIFICATE_VERIFY,

                SSLHandshake.FINISHED

            };

            for (SSLHandshake hs : probableHandshakeMessages) {

                HandshakeProducer handshakeProducer =

                        chc.handshakeProducers.remove(hs.id);

                if (handshakeProducer != null) {

                    handshakeProducer.produce(context, null);

                }

            }

        }

    }

}