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	/*
	* Copyright (c) 2003, 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 java.util.Map;
	import sun.security.ssl.SSLHandshake.HandshakeMessage;

	/**
	* Pack of the "ClientKeyExchange" handshake message.
	*/
	final class ClientKeyExchange {
	static final SSLConsumer handshakeConsumer =
	new ClientKeyExchangeConsumer();
	static final HandshakeProducer handshakeProducer =
	new ClientKeyExchangeProducer();


	/**
	* The "ClientKeyExchange" handshake message producer.
	*/
	private static final
	class ClientKeyExchangeProducer implements HandshakeProducer {
	// Prevent instantiation of this class.
	private ClientKeyExchangeProducer() {
	// blank
	}

	@Override
	public byte[] produce(ConnectionContext context,
	HandshakeMessage message) throws IOException {
	// The producing happens in client side only.
	ClientHandshakeContext chc = (ClientHandshakeContext)context;
	SSLKeyExchange ke = SSLKeyExchange.valueOf(
	chc.negotiatedCipherSuite.keyExchange,
	chc.negotiatedProtocol);
	if (ke != null) {
	for (Map.Entry<Byte, HandshakeProducer> hp :
	ke.getHandshakeProducers(chc)) {
	if (hp.getKey() == SSLHandshake.CLIENT_KEY_EXCHANGE.id) {
	return hp.getValue().produce(context, message);
	}
	}
	}

	// not consumer defined.
	throw chc.conContext.fatal(Alert.UNEXPECTED_MESSAGE,
	"Unexpected ClientKeyExchange handshake message.");
	}
	}

	/**
	* The "ClientKeyExchange" handshake message consumer.
	*/
	private static final
	class ClientKeyExchangeConsumer implements SSLConsumer {
	// Prevent instantiation of this class.
	private ClientKeyExchangeConsumer() {
	// blank
	}

	@Override
	public void consume(ConnectionContext context,
	ByteBuffer message) throws IOException {
	// The consuming happens in server side only.
	ServerHandshakeContext shc = (ServerHandshakeContext)context;
	// clean up this consumer
	shc.handshakeConsumers.remove(SSLHandshake.CLIENT_KEY_EXCHANGE.id);

	// Check for an unprocessed client Certificate message. If that
	// handshake consumer is still present then that expected message
	// was not sent.
	if (shc.handshakeConsumers.containsKey(
	SSLHandshake.CERTIFICATE.id)) {
	throw shc.conContext.fatal(Alert.UNEXPECTED_MESSAGE,
	"Unexpected ClientKeyExchange handshake message.");
	}

	SSLKeyExchange ke = SSLKeyExchange.valueOf(
	shc.negotiatedCipherSuite.keyExchange,
	shc.negotiatedProtocol);
	if (ke != null) {
	for (Map.Entry<Byte, SSLConsumer> hc :
	ke.getHandshakeConsumers(shc)) {
	if (hc.getKey() == SSLHandshake.CLIENT_KEY_EXCHANGE.id) {
	hc.getValue().consume(context, message);
	return;
	}
	}
	}

	// not consumer defined.
	throw shc.conContext.fatal(Alert.UNEXPECTED_MESSAGE,
	"Unexpected ClientKeyExchange handshake message.");
	}
	}
	}

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