1 /*
   2  * Copyright (c) 2003, 2018, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package sun.security.ssl;
  27 
  28 import java.io.IOException;
  29 import java.nio.ByteBuffer;
  30 import java.util.Map;
  31 import sun.security.ssl.SSLHandshake.HandshakeMessage;
  32 
  33 /**
  34  * Pack of the "ClientKeyExchange" handshake message.
  35  */
  36 final class ClientKeyExchange {
  37     static final SSLConsumer handshakeConsumer =
  38             new ClientKeyExchangeConsumer();
  39     static final HandshakeProducer handshakeProducer =
  40             new ClientKeyExchangeProducer();
  41 
  42 
  43     /**
  44      * The "ClientKeyExchange" handshake message producer.
  45      */
  46     private static final
  47             class ClientKeyExchangeProducer implements HandshakeProducer {
  48         // Prevent instantiation of this class.
  49         private ClientKeyExchangeProducer() {
  50             // blank
  51         }
  52 
  53         @Override
  54         public byte[] produce(ConnectionContext context,
  55                 HandshakeMessage message) throws IOException {
  56             // The producing happens in client side only.
  57             ClientHandshakeContext chc = (ClientHandshakeContext)context;
  58             SSLKeyExchange ke =
  59                 SSLKeyExchange.valueOf(chc.negotiatedCipherSuite.keyExchange);
  60             if (ke != null) {
  61                 for (Map.Entry<Byte, HandshakeProducer> hp :
  62                         ke.getHandshakeProducers(chc)) {
  63                     if (hp.getKey() == SSLHandshake.CLIENT_KEY_EXCHANGE.id) {
  64                         return hp.getValue().produce(context, message);
  65                     }
  66                 }
  67             }
  68 
  69             // not comsumer defined.
  70             chc.conContext.fatal(Alert.UNEXPECTED_MESSAGE,
  71                         "Unexpected ClientKeyExchange handshake message.");
  72             return null;    // make the compiler happe
  73         }
  74     }
  75 
  76     /**
  77      * The "ClientKeyExchange" handshake message consumer.
  78      */
  79     private static final
  80             class ClientKeyExchangeConsumer implements SSLConsumer {
  81         // Prevent instantiation of this class.
  82         private ClientKeyExchangeConsumer() {
  83             // blank
  84         }
  85 
  86         @Override
  87         public void consume(ConnectionContext context,
  88                 ByteBuffer message) throws IOException {
  89             // The consuming happens in server side only.
  90             ServerHandshakeContext shc = (ServerHandshakeContext)context;
  91             // clean up this consumer
  92             shc.handshakeConsumers.remove(SSLHandshake.CLIENT_KEY_EXCHANGE.id);
  93             SSLKeyExchange ke =
  94                 SSLKeyExchange.valueOf(shc.negotiatedCipherSuite.keyExchange);
  95             if (ke != null) {
  96                 for (Map.Entry<Byte, SSLConsumer> hc :
  97                         ke.getHandshakeConsumers(shc)) {
  98                     if (hc.getKey() == SSLHandshake.CLIENT_KEY_EXCHANGE.id) {
  99                         hc.getValue().consume(context, message);
 100                         return;
 101                     }
 102                 }
 103             }
 104 
 105             // not comsumer defined.
 106             shc.conContext.fatal(Alert.UNEXPECTED_MESSAGE,
 107                         "Unexpected ClientKeyExchange handshake message.");
 108         }
 109     }
 110 }
 111