Source for gnu.javax.crypto.jce.sig.DHKeyPairGeneratorSpi

   1: /* DHKeyPairGeneratorSpi.java -- DH key-pair generator JCE Adapter
   2:    Copyright (C) 2006 Free Software Foundation, Inc.
   3: 
   4: This file is 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, or (at your option)
   9: 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; see the file COPYING.  If not, write to the
  18: Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  19: 02110-1301 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.crypto.jce.sig;
  40: 
  41: import java.security.InvalidAlgorithmParameterException;
  42: import java.security.SecureRandom;
  43: import java.security.spec.AlgorithmParameterSpec;
  44: import java.util.HashMap;
  45: 
  46: import javax.crypto.spec.DHGenParameterSpec;
  47: import javax.crypto.spec.DHParameterSpec;
  48: 
  49: import gnu.java.security.Registry;
  50: import gnu.java.security.jce.sig.KeyPairGeneratorAdapter;
  51: import gnu.javax.crypto.key.dh.GnuDHKeyPairGenerator;
  52: 
  53: public class DHKeyPairGeneratorSpi
  54:     extends KeyPairGeneratorAdapter
  55: {
  56:   public DHKeyPairGeneratorSpi()
  57:   {
  58:     super(Registry.DH_KPG);
  59:   }
  60: 
  61:   public void initialize(int keysize, SecureRandom random)
  62:   {
  63:     HashMap attributes = new HashMap();
  64:     attributes.put(GnuDHKeyPairGenerator.PRIME_SIZE, Integer.valueOf(keysize));
  65:     if (random != null)
  66:       attributes.put(GnuDHKeyPairGenerator.SOURCE_OF_RANDOMNESS, random);
  67: 
  68:     attributes.put(GnuDHKeyPairGenerator.PREFERRED_ENCODING_FORMAT,
  69:                    Integer.valueOf(Registry.ASN1_ENCODING_ID));
  70:     adaptee.setup(attributes);
  71:   }
  72: 
  73:   public void initialize(AlgorithmParameterSpec params, SecureRandom random)
  74:       throws InvalidAlgorithmParameterException
  75:   {
  76:     HashMap attributes = new HashMap();
  77:     if (params != null)
  78:       {
  79:         if (! (params instanceof DHGenParameterSpec) &&
  80:             ! (params instanceof DHParameterSpec))
  81:           throw new InvalidAlgorithmParameterException("params");
  82: 
  83:         attributes.put(GnuDHKeyPairGenerator.DH_PARAMETERS, params);
  84:       }
  85: 
  86:     if (random != null)
  87:       attributes.put(GnuDHKeyPairGenerator.SOURCE_OF_RANDOMNESS, random);
  88: 
  89:     attributes.put(GnuDHKeyPairGenerator.PREFERRED_ENCODING_FORMAT,
  90:                    Integer.valueOf(Registry.ASN1_ENCODING_ID));
  91:     adaptee.setup(attributes);
  92:   }
  93: }