trunk/libjava/classpath/gnu/javax/net/ssl/provider/SRPTrustManagerFactory.java

   1 /* SRPTrustManagerFactory.java -- trust manager for SRP.
   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.IOException;
  42 import java.math.BigInteger;
  43
  44 import java.security.InvalidAlgorithmParameterException;
  45 import java.security.KeyPair;
  46 import java.security.KeyStore;
  47 import java.util.HashMap;
  48
  49 import javax.net.ssl.ManagerFactoryParameters;
  50 import javax.net.ssl.TrustManager;
  51 import javax.net.ssl.TrustManagerFactorySpi;
  52
  53 import gnu.java.security.key.IKeyPairGenerator;
  54 import gnu.javax.crypto.key.srp6.SRPKeyPairGenerator;
  55 import gnu.javax.crypto.sasl.srp.PasswordFile;
  56 import gnu.javax.crypto.sasl.srp.SRP;
  57
  58 import gnu.javax.net.ssl.SRPManagerParameters;
  59 import gnu.javax.net.ssl.SRPTrustManager;
  60
  61 /**
  62  * This is an implementation of a {@link javax.net.ssl.TrustManagerFactory}
  63  * engine for the ``SRP'' algorithm. You must initialize instances of this
  64  * algorithm with {@link SRPManagerParameters}.
  65  */
  66 public class SRPTrustManagerFactory extends TrustManagerFactorySpi
  67 {
  68
  69   // Field.
  70   // -------------------------------------------------------------------------
  71
  72   private Manager current;
  73
  74   // Constructor.
  75   // -------------------------------------------------------------------------
  76
  77   public SRPTrustManagerFactory()
  78   {
  79     super();
  80   }
  81
  82   // Instance methods.
  83   // -------------------------------------------------------------------------
  84
  85   protected TrustManager[] engineGetTrustManagers()
  86   {
  87     if (current == null)
  88       throw new IllegalStateException("not initialized");
  89     return new TrustManager[] { current };
  90   }
  91
  92   protected void engineInit(KeyStore ks)
  93   {
  94     throw new IllegalArgumentException("only accepts SRPManagerParameters");
  95   }
  96
  97   protected void engineInit(ManagerFactoryParameters params)
  98     throws InvalidAlgorithmParameterException
  99   {
 100     if (params == null)
 101       {
 102         try
 103           {
 104             String srpPasswd = Util.getSecurityProperty("jessie.srp.password.file");
 105             if (srpPasswd == null)
 106               {
 107                 current = new Manager(new PasswordFile());
 108                 return;
 109               }
 110             String srpPasswd2 = Util.getSecurityProperty("jessie.srp.password.file2");
 111             if (srpPasswd2 == null)
 112               srpPasswd2 = srpPasswd + "2";
 113             String srpConfig = Util.getSecurityProperty("jessie.srp.config");
 114             if (srpConfig == null)
 115               srpConfig = srpPasswd + ".conf";
 116             current = new Manager(new PasswordFile(srpPasswd, srpPasswd2, srpConfig));
 117             return;
 118           }
 119         catch (IOException ioe)
 120           {
 121             throw new InvalidAlgorithmParameterException("default initialization failed: "
 122                                                          + ioe.toString());
 123           }
 124       }
 125     if (params instanceof SRPManagerParameters)
 126       {
 127         current = new Manager(((SRPManagerParameters) params).getPasswordFile());
 128         return;
 129       }
 130     throw new InvalidAlgorithmParameterException();
 131   }
 132
 133   // Inner class.
 134   // -------------------------------------------------------------------------
 135
 136   private class Manager implements SRPTrustManager
 137   {
 138
 139     // Field.
 140     // -----------------------------------------------------------------------
 141
 142     private final PasswordFile file;
 143
 144     // Constructor.
 145     // -----------------------------------------------------------------------
 146
 147     Manager(PasswordFile file)
 148     {
 149       this.file = file;
 150     }
 151
 152     // Instance methods.
 153     // -----------------------------------------------------------------------
 154
 155     public boolean contains(String user)
 156     {
 157       try
 158         {
 159           return file.contains(user);
 160         }
 161       catch (IOException ioe) { }
 162       return false;
 163     }
 164
 165     public KeyPair getKeyPair(String user)
 166     {
 167       try
 168         {
 169           if (file.contains(user))
 170             {
 171               SRP srp = SRP.instance("SHA");
 172               String[] ent = file.lookup(user, "SHA");
 173               String[] cnf = file.lookupConfig(ent[2]);
 174               BigInteger v, N, g;
 175               v = new BigInteger(1, gnu.java.security.util.Util.fromBase64(ent[0]));
 176               N = new BigInteger(1, gnu.java.security.util.Util.fromBase64(cnf[0]));
 177               g = new BigInteger(1, gnu.java.security.util.Util.fromBase64(cnf[1]));
 178               IKeyPairGenerator kpg = new SRPKeyPairGenerator();
 179               HashMap attr = new HashMap();
 180               attr.put(SRPKeyPairGenerator.SHARED_MODULUS, N);
 181               attr.put(SRPKeyPairGenerator.GENERATOR, g);
 182               attr.put(SRPKeyPairGenerator.USER_VERIFIER, v);
 183               kpg.setup(attr);
 184               return kpg.generate();
 185             }
 186         }
 187       catch (IOException ioe) { }
 188       return null;
 189     }
 190
 191     public byte[] getSalt(String user)
 192     {
 193       try
 194         {
 195           if (file.contains(user))
 196             {
 197               return gnu.java.security.util.Util.fromBase64(file.lookup(user, "SHA")[1]);
 198             }
 199         }
 200       catch (IOException ioe) { }
 201       return null;
 202     }
 203
 204     public BigInteger getVerifier(String user)
 205     {
 206       try
 207         {
 208           if (file.contains(user))
 209             {
 210               return new BigInteger(1,
 211                 gnu.java.security.util.Util.fromBase64(file.lookup(user, "SHA")[0]));
 212             }
 213         }
 214       catch (IOException ioe) { }
 215       return null;
 216     }
 217
 218     public PasswordFile getPasswordFile()
 219     {
 220       return file;
 221     }
 222   }
 223 }