1 /*
   2  * Copyright (c) 2006, 2012, 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.io.PrintStream;
  30 
  31 import java.security.PublicKey;
  32 import java.security.interfaces.ECPublicKey;
  33 import java.security.spec.*;
  34 
  35 /**
  36  * ClientKeyExchange message for all ECDH based key exchange methods. It
  37  * contains the client's ephemeral public value.
  38  *
  39  * @since   1.6
  40  * @author  Andreas Sterbenz
  41  */
  42 final class ECDHClientKeyExchange extends HandshakeMessage {
  43 
  44     @Override
  45     int messageType() {
  46         return ht_client_key_exchange;
  47     }
  48 
  49     private byte[] encodedPoint;
  50 
  51     byte[] getEncodedPoint() {
  52         return encodedPoint;
  53     }
  54 
  55     // Called by the client with its ephemeral public key.
  56     ECDHClientKeyExchange(PublicKey publicKey) {
  57         ECPublicKey ecKey = (ECPublicKey)publicKey;
  58         ECPoint point = ecKey.getW();
  59         ECParameterSpec params = ecKey.getParams();
  60         encodedPoint = JsseJce.encodePoint(point, params.getCurve());
  61     }
  62 
  63     ECDHClientKeyExchange(HandshakeInStream input) throws IOException {
  64         encodedPoint = input.getBytes8();
  65     }
  66 
  67     @Override
  68     int messageLength() {
  69         return encodedPoint.length + 1;
  70     }
  71 
  72     @Override
  73     void send(HandshakeOutStream s) throws IOException {
  74         s.putBytes8(encodedPoint);
  75     }
  76 
  77     @Override
  78     void print(PrintStream s) throws IOException {
  79         s.println("*** ECDHClientKeyExchange");
  80 
  81         if (debug != null && Debug.isOn("verbose")) {
  82             Debug.println(s, "ECDH Public value", encodedPoint);
  83         }
  84     }
  85 }