libjava/classpath/gnu/javax/net/ssl/provider/ServerHello.java

   1 /* ServerHello.java -- SSL ServerHello message.
   2    Copyright (C) 2006  Free Software Foundation, Inc.
   3
   4 This file is a part of GNU Classpath.
   5
   6 GNU Classpath is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2 of the License, or (at
   9 your option) any later version.
  10
  11 GNU Classpath is distributed in the hope that it will be useful, but
  12 WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14 General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GNU Classpath; if not, write to the Free Software
  18 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301
  19 USA
  20
  21 Linking this library statically or dynamically with other modules is
  22 making a combined work based on this library.  Thus, the terms and
  23 conditions of the GNU General Public License cover the whole
  24 combination.
  25
  26 As a special exception, the copyright holders of this library give you
  27 permission to link this library with independent modules to produce an
  28 executable, regardless of the license terms of these independent
  29 modules, and to copy and distribute the resulting executable under
  30 terms of your choice, provided that you also meet, for each linked
  31 independent module, the terms and conditions of the license of that
  32 module.  An independent module is a module which is not derived from
  33 or based on this library.  If you modify this library, you may extend
  34 this exception to your version of the library, but you are not
  35 obligated to do so.  If you do not wish to do so, delete this
  36 exception statement from your version.  */
  37
  38
  39 package gnu.javax.net.ssl.provider;
  40
  41 import java.io.BufferedReader;
  42 import java.io.ByteArrayOutputStream;
  43 import java.io.InputStream;
  44 import java.io.IOException;
  45 import java.io.OutputStream;
  46 import java.io.PrintWriter;
  47 import java.io.StringReader;
  48 import java.io.StringWriter;
  49
  50 import java.util.ArrayList;
  51 import java.util.Iterator;
  52 import java.util.LinkedList;
  53 import java.util.List;
  54
  55 import javax.net.ssl.SSLProtocolException;
  56
  57 class ServerHello implements Handshake.Body
  58 {
  59
  60   // Fields.
  61   // -------------------------------------------------------------------------
  62
  63   private final ProtocolVersion version;
  64   private final Random random;
  65   private final byte[] sessionId;
  66   private final CipherSuite suite;
  67   private final CompressionMethod comp;
  68   private final List extensions;
  69
  70   // Constructor.
  71   // -------------------------------------------------------------------------
  72
  73   ServerHello(ProtocolVersion version, Random random,
  74               byte[] sessionId, CipherSuite suite,
  75               CompressionMethod comp)
  76   {
  77     this(version, random, sessionId, suite, comp, null);
  78   }
  79
  80   ServerHello(ProtocolVersion version, Random random,
  81               byte[] sessionId, CipherSuite suite,
  82               CompressionMethod comp, List extensions)
  83   {
  84     this.version = version;
  85     this.random = random;
  86     this.sessionId = sessionId;
  87     this.suite = suite;
  88     this.comp = comp;
  89     this.extensions = extensions;
  90   }
  91
  92   // Class methods.
  93   // -------------------------------------------------------------------------
  94
  95   static ServerHello read(InputStream in) throws IOException
  96   {
  97     ProtocolVersion vers = ProtocolVersion.read(in);
  98     Random rand = Random.read(in);
  99     byte[] id = new byte[in.read() & 0xFF];
 100     in.read(id);
 101     CipherSuite suite = CipherSuite.read(in).resolve(vers);
 102     CompressionMethod comp = CompressionMethod.read(in);
 103     List ext = null;
 104     if (in.available() > 0)
 105       {
 106         ext = new LinkedList();
 107         int len = (in.read() >>> 8 & 0xFF) | (in.read() & 0xFF);
 108         int count = 0;
 109         while (count < len)
 110           {
 111             Extension e = Extension.read(in);
 112             ext.add(e);
 113             count += e.getValue().length + 4;
 114           }
 115       }
 116     return new ServerHello(vers, rand, id, suite, comp, ext);
 117   }
 118
 119   // Instance methods.
 120   // -------------------------------------------------------------------------
 121
 122   public void write(OutputStream out) throws IOException
 123   {
 124     version.write(out);
 125     random.write(out);
 126     out.write(sessionId.length);
 127     out.write(sessionId);
 128     suite.write(out);
 129     out.write(comp.getValue());
 130     if (extensions != null)
 131       {
 132         ByteArrayOutputStream out2 = new ByteArrayOutputStream();
 133         for (Iterator i = extensions.iterator(); i.hasNext(); )
 134           ((Extension) i.next()).write(out2);
 135         out.write(out2.size() >>> 8 & 0xFF);
 136         out.write(out2.size() & 0xFF);
 137         out2.writeTo(out);
 138       }
 139   }
 140
 141   ProtocolVersion getVersion()
 142   {
 143     return version;
 144   }
 145
 146   Random getRandom()
 147   {
 148     return random;
 149   }
 150
 151   byte[] getSessionId()
 152   {
 153     return (byte[]) sessionId.clone();
 154   }
 155
 156   CipherSuite getCipherSuite()
 157   {
 158     return suite;
 159   }
 160
 161   CompressionMethod getCompressionMethod()
 162   {
 163     return comp;
 164   }
 165
 166   List getExtensions()
 167   {
 168     return extensions;
 169   }
 170
 171   public String toString()
 172   {
 173     StringWriter str = new StringWriter();
 174     PrintWriter out = new PrintWriter(str);
 175     out.println("struct {");
 176     out.println("  version = " + version + ";");
 177     BufferedReader r = new BufferedReader(new StringReader(random.toString()));
 178     String s;
 179     try
 180       {
 181         while ((s = r.readLine()) != null)
 182           {
 183             out.print("  ");
 184             out.println(s);
 185           }
 186       }
 187     catch (IOException ignored)
 188       {
 189       }
 190     out.println("  sessionId = " + Util.toHexString(sessionId, ':') + ";");
 191     out.println("  cipherSuite = " + suite + ";");
 192     out.println("  compressionMethod = " + comp + ";");
 193     if (extensions != null)
 194       {
 195         out.println("  extensions = {");
 196         for (Iterator i = extensions.iterator(); i.hasNext(); )
 197           {
 198             r = new BufferedReader(new StringReader(i.next().toString()));
 199             try
 200               {
 201                 while ((s = r.readLine()) != null)
 202                   {
 203                     out.print("    ");
 204                     out.println(s);
 205                   }
 206               }
 207             catch (IOException ignored)
 208               {
 209               }
 210           }
 211         out.println("  };");
 212       }
 213     out.println("} ServerHello;");
 214     return str.toString();
 215   }
 216 }