1 /*

     2  * Copyright (c) 2015, 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 ServerKeyExchange handshake message.

    35  */

    36 final class ServerKeyExchange {

    37     static final SSLConsumer handshakeConsumer =

    38         new ServerKeyExchangeConsumer();

    39     static final HandshakeProducer handshakeProducer =

    40         new ServerKeyExchangeProducer();

    41 

    42     /**

    43      * The "ServerKeyExchange" handshake message producer.

    44      */

    45     private static final

    46             class ServerKeyExchangeProducer implements HandshakeProducer {

    47         // Prevent instantiation of this class.

    48         private ServerKeyExchangeProducer() {

    49             // blank

    50         }

    51 

    52         @Override

    53         public byte[] produce(ConnectionContext context,

    54                 HandshakeMessage message) throws IOException {

    55             // The producing happens in server side only.

    56             ServerHandshakeContext shc = (ServerHandshakeContext)context;

    57 

    58             SSLKeyExchange ke =

    59                 SSLKeyExchange.valueOf(shc.negotiatedCipherSuite.keyExchange);

    60             if (ke != null) {

    61                 for (Map.Entry<Byte, HandshakeProducer> hc :

    62                         ke.getHandshakeProducers(shc)) {

    63                     if (hc.getKey() == SSLHandshake.SERVER_KEY_EXCHANGE.id) {

    64                         return hc.getValue().produce(context, message);

    65                     }

    66                 }

    67             }

    68 

    69             // not producer defined.

    70             shc.conContext.fatal(Alert.HANDSHAKE_FAILURE,

    71                     "No ServerKeyExchange handshake message can be produced.");

    72             return null;    // make the compiler happe

    73         }

    74     }

    75 

    76     /**

    77      * The "ServerKeyExchange" handshake message consumer.

    78      */

    79     private static final

    80             class ServerKeyExchangeConsumer implements SSLConsumer {

    81         // Prevent instantiation of this class.

    82         private ServerKeyExchangeConsumer() {

    83             // blank

    84         }

    85 

    86         @Override

    87         public void consume(ConnectionContext context,

    88                 ByteBuffer message) throws IOException {

    89             // The producing happens in client side only.

    90             ClientHandshakeContext chc = (ClientHandshakeContext)context;

    91 

    92             // clean up this consumer

    93             chc.handshakeConsumers.remove(SSLHandshake.SERVER_KEY_EXCHANGE.id);

    94 

    95             SSLKeyExchange ke =

    96                 SSLKeyExchange.valueOf(chc.negotiatedCipherSuite.keyExchange);

    97             if (ke != null) {

    98                 for (Map.Entry<Byte, SSLConsumer> hc :

    99                         ke.getHandshakeConsumers(chc)) {

   100                     if (hc.getKey() == SSLHandshake.SERVER_KEY_EXCHANGE.id) {

   101                         hc.getValue().consume(context, message);

   102                         return;

   103                     }

   104                 }

   105             }

   106 

   107             // not comsumer defined.

   108             chc.conContext.fatal(Alert.UNEXPECTED_MESSAGE,

   109                         "Unexpected ServerKeyExchange handshake message.");

   110         }

   111     }

   112 }

   113