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

   1 /* Context.java -- SSLContext implementation.
   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.File;
  42 import java.io.InputStream;
  43
  44 import java.security.InvalidAlgorithmParameterException;
  45 import java.security.KeyStoreException;
  46 import java.security.KeyManagementException;
  47 import java.security.NoSuchAlgorithmException;
  48 import java.security.NoSuchProviderException;
  49 import java.security.SecureRandom;
  50 import java.security.Security;
  51 import java.security.UnrecoverableKeyException;
  52 import java.sql.SQLException;
  53
  54 import javax.net.ssl.KeyManager;
  55 import javax.net.ssl.KeyManagerFactory;
  56 import javax.net.ssl.SSLContextSpi;
  57 import javax.net.ssl.SSLSessionContext;
  58 import javax.net.ssl.TrustManager;
  59 import javax.net.ssl.TrustManagerFactory;
  60 import javax.net.ssl.X509KeyManager;
  61 import javax.net.ssl.X509TrustManager;
  62
  63 import gnu.javax.net.ssl.NullManagerParameters;
  64 import gnu.javax.net.ssl.SRPTrustManager;
  65 import gnu.javax.net.ssl.StaticTrustAnchors;
  66
  67 /**
  68  * This is Jessie's implementation of a {@link javax.net.ssl.SSLContext}
  69  * engine, and is available under the algorithm names ``SSLv3'', ``SSL'',
  70  * ``TLSv1'', and ``TLS''.
  71  */
  72 public final class Context extends SSLContextSpi
  73 {
  74
  75   // Fields.
  76   // -------------------------------------------------------------------------
  77
  78   private SessionContext clientSessions;
  79   private SessionContext serverSessions;
  80   private X509KeyManager keyManager;
  81   private X509TrustManager trustManager;
  82   private SRPTrustManager srpTrustManager;
  83   private SecureRandom random;
  84
  85   // Constructor.
  86   // -------------------------------------------------------------------------
  87
  88   public Context()
  89   {
  90     String codec = Util.getSecurityProperty("jessie.clientSessionContext.codec");
  91     String codecClass = null;
  92     if (codec == null)
  93       {
  94         codec = "null";
  95       }
  96     if (codec.equalsIgnoreCase("xml"))
  97       {
  98         codecClass = "gnu.javax.net.ssl.provider.XMLSessionContext";
  99       }
 100     else if (codec.equalsIgnoreCase("jdbc"))
 101       {
 102         codecClass = "gnu.javax.net.ssl.provider.JDBCSessionContext";
 103       }
 104     else if (codec.equalsIgnoreCase("null"))
 105       {
 106         codecClass = "gnu.javax.net.ssl.provider.SessionContext";
 107       }
 108     else
 109       {
 110         throw new IllegalArgumentException("no such codec: " + codec);
 111       }
 112     try
 113       {
 114         ClassLoader cl = Context.class.getClassLoader();
 115         if (cl == null)
 116           {
 117             cl = ClassLoader.getSystemClassLoader();
 118           }
 119         clientSessions = (SessionContext) cl.loadClass(codecClass).newInstance();
 120       }
 121     catch (Exception ex)
 122       {
 123         ex.printStackTrace();
 124         throw new IllegalArgumentException(ex.toString());
 125       }
 126
 127     codec = Util.getSecurityProperty("jessie.serverSessionContext.codec");
 128     if (codec == null)
 129       {
 130         codec = "null";
 131       }
 132     if (codec.equalsIgnoreCase("xml"))
 133       {
 134         codecClass = "gnu.javax.net.ssl.provider.XMLSessionContext";
 135       }
 136     else if (codec.equalsIgnoreCase("jdbc"))
 137       {
 138         codecClass = "gnu.javax.net.ssl.provider.JDBCSessionContext";
 139       }
 140     else if (codec.equalsIgnoreCase("null"))
 141       {
 142         codecClass = "gnu.javax.net.ssl.provider.SessionContext";
 143       }
 144     else
 145       {
 146         throw new IllegalArgumentException("no such codec: " + codec);
 147       }
 148     try
 149       {
 150         ClassLoader cl = Context.class.getClassLoader();
 151         if (cl == null)
 152           {
 153             cl = ClassLoader.getSystemClassLoader();
 154           }
 155         serverSessions = (SessionContext) cl.loadClass(codecClass).newInstance();
 156       }
 157     catch (Exception ex)
 158       {
 159         ex.printStackTrace();
 160         throw new IllegalArgumentException(ex.toString());
 161       }
 162   }
 163
 164   // Engine methods.
 165   // -------------------------------------------------------------------------
 166
 167   protected SSLSessionContext engineGetClientSessionContext()
 168   {
 169     return clientSessions;
 170   }
 171
 172   protected SSLSessionContext engineGetServerSessionContext()
 173   {
 174     return serverSessions;
 175   }
 176
 177   protected javax.net.ssl.SSLServerSocketFactory engineGetServerSocketFactory()
 178   {
 179     if (keyManager == null || (trustManager == null && srpTrustManager == null)
 180         || random == null)
 181       {
 182         throw new IllegalStateException();
 183       }
 184     return new SSLServerSocketFactory(trustManager, srpTrustManager, keyManager,
 185                                       random, serverSessions);
 186   }
 187
 188   protected javax.net.ssl.SSLSocketFactory engineGetSocketFactory()
 189   {
 190     if (keyManager == null || trustManager == null || random == null)
 191       {
 192         throw new IllegalStateException();
 193       }
 194     return new SSLSocketFactory(trustManager, keyManager, random, clientSessions);
 195   }
 196
 197   protected void engineInit(KeyManager[] keyManagers,
 198                             TrustManager[] trustManagers, SecureRandom random)
 199     throws KeyManagementException
 200   {
 201     keyManager = null;
 202     trustManager = null;
 203     srpTrustManager = null;
 204     if (keyManagers != null)
 205       {
 206         for (int i = 0; i < keyManagers.length; i++)
 207           {
 208             if (keyManagers[i] instanceof X509KeyManager)
 209               {
 210                 keyManager = (X509KeyManager) keyManagers[i];
 211                 break;
 212               }
 213           }
 214       }
 215     if (keyManager == null)
 216       {
 217         keyManager = defaultKeyManager();
 218       }
 219     if (trustManagers != null)
 220       {
 221         for (int i = 0; i < trustManagers.length; i++)
 222           {
 223             if (trustManagers[i] instanceof X509TrustManager)
 224               {
 225                 if (trustManager == null)
 226                   {
 227                     trustManager = (X509TrustManager) trustManagers[i];
 228                   }
 229               }
 230             else if (trustManagers[i] instanceof SRPTrustManager)
 231               {
 232                 if (srpTrustManager == null)
 233                   {
 234                     srpTrustManager = (SRPTrustManager) trustManagers[i];
 235                   }
 236               }
 237           }
 238       }
 239     if (trustManager == null && srpTrustManager == null)
 240       {
 241         trustManager = defaultTrustManager();
 242       }
 243     if (random != null)
 244       {
 245         this.random = random;
 246       }
 247     else
 248       {
 249         this.random = defaultRandom();
 250       }
 251   }
 252
 253   // Own methods.
 254   // -------------------------------------------------------------------------
 255
 256   private X509KeyManager defaultKeyManager() throws KeyManagementException
 257   {
 258     KeyManagerFactory fact = null;
 259     try
 260       {
 261         fact = KeyManagerFactory.getInstance("JessieX509", "Jessie");
 262       }
 263     catch (NoSuchAlgorithmException nsae)
 264       {
 265         throw new KeyManagementException();
 266       }
 267     catch (NoSuchProviderException nspe)
 268       {
 269         throw new KeyManagementException();
 270       }
 271     try
 272       {
 273         fact.init(null, null);
 274         return (X509KeyManager) fact.getKeyManagers()[0];
 275       }
 276     catch (NoSuchAlgorithmException nsae) { }
 277     catch (KeyStoreException kse) { }
 278     catch (UnrecoverableKeyException uke) { }
 279     catch (IllegalStateException ise) { }
 280
 281     try
 282       {
 283         fact.init(new NullManagerParameters());
 284         return (X509KeyManager) fact.getKeyManagers()[0];
 285       }
 286     catch (Exception shouldNotHappen)
 287       {
 288         throw new Error(shouldNotHappen.toString());
 289       }
 290   }
 291
 292   private X509TrustManager defaultTrustManager() throws KeyManagementException
 293   {
 294     try
 295       {
 296         TrustManagerFactory fact =
 297           TrustManagerFactory.getInstance("JessieX509", "Jessie");
 298         fact.init(StaticTrustAnchors.CA_CERTS);
 299         return (X509TrustManager) fact.getTrustManagers()[0];
 300       }
 301     catch (NoSuchAlgorithmException nsae)
 302       {
 303         throw new KeyManagementException(nsae.toString());
 304       }
 305     catch (NoSuchProviderException nspe)
 306       {
 307         throw new KeyManagementException(nspe.toString());
 308       }
 309     catch (InvalidAlgorithmParameterException kse)
 310       {
 311         throw new KeyManagementException(kse.toString());
 312       }
 313   }
 314
 315   private SecureRandom defaultRandom() throws KeyManagementException
 316   {
 317     String alg = Util.getSecurityProperty("jessie.secure.random");
 318     if (alg == null)
 319       {
 320         alg = "Fortuna";
 321       }
 322     SecureRandom rand = null;
 323     try
 324       {
 325         rand = SecureRandom.getInstance(alg);
 326       }
 327     catch (NoSuchAlgorithmException nsae)
 328       {
 329         throw new KeyManagementException(nsae.toString());
 330       }
 331
 332     return rand;
 333   }
 334 }