1 /*

     2  * Copyright (c) 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 = SSLKeyExchange.valueOf(

    59                     shc.negotiatedCipherSuite.keyExchange,

    60                     shc.negotiatedProtocol);

    61             if (ke != null) {

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

    63                         ke.getHandshakeProducers(shc)) {

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

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

    66                     }

    67                 }

    68             }

    69 

    70             // not producer defined.

    71             shc.conContext.fatal(Alert.HANDSHAKE_FAILURE,

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

    73             return null;    // make the compiler happe

    74         }

    75     }

    76 

    77     /**

    78      * The "ServerKeyExchange" handshake message consumer.

    79      */

    80     private static final

    81             class ServerKeyExchangeConsumer implements SSLConsumer {

    82         // Prevent instantiation of this class.

    83         private ServerKeyExchangeConsumer() {

    84             // blank

    85         }

    86 

    87         @Override

    88         public void consume(ConnectionContext context,

    89                 ByteBuffer message) throws IOException {

    90             // The consuming happens in client side only.

    91             ClientHandshakeContext chc = (ClientHandshakeContext)context;

    92 

    93             // clean up this consumer

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

    95 

    96             SSLKeyExchange ke = SSLKeyExchange.valueOf(

    97                     chc.negotiatedCipherSuite.keyExchange,

    98                     chc.negotiatedProtocol);

    99             if (ke != null) {

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

   101                         ke.getHandshakeConsumers(chc)) {

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

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

   104                         return;

   105                     }

   106                 }

   107             }

   108 

   109             // no consumer defined.

   110             chc.conContext.fatal(Alert.UNEXPECTED_MESSAGE,

   111                         "Unexpected ServerKeyExchange handshake message.");

   112         }

   113     }

   114 }

   115