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