Source for gnu.java.security.jce.sig.RSAKeyPairGeneratorSpi

   1: /* RSAKeyPairGeneratorSpi.java -- JCE RSA KeyPairGenerator Adapter
   2:    Copyright (C) 2001, 2002, 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.java.security.jce.sig;
  40: 
  41: import gnu.java.security.Registry;
  42: import gnu.java.security.key.rsa.RSAKeyPairGenerator;
  43: 
  44: import java.security.InvalidAlgorithmParameterException;
  45: import java.security.SecureRandom;
  46: import java.security.spec.AlgorithmParameterSpec;
  47: import java.security.spec.RSAKeyGenParameterSpec;
  48: import java.util.HashMap;
  49: 
  50: /**
  51:  * The implementation of a {@link java.security.KeyPairGenerator} adapter class
  52:  * to wrap GNU RSA keypair generator instances.
  53:  * <p>
  54:  * In case the client does not explicitly initialize the KeyPairGenerator (via a
  55:  * call to an <code>initialize()</code> method), the GNU provider uses a
  56:  * default <i>modulus</i> size (keysize) of 1024 bits.
  57:  */
  58: public class RSAKeyPairGeneratorSpi
  59:     extends KeyPairGeneratorAdapter
  60: {
  61:   public RSAKeyPairGeneratorSpi()
  62:   {
  63:     super(Registry.RSA_KPG);
  64:   }
  65: 
  66:   public void initialize(int keysize, SecureRandom random)
  67:   {
  68:     HashMap attributes = new HashMap();
  69:     attributes.put(RSAKeyPairGenerator.MODULUS_LENGTH, Integer.valueOf(keysize));
  70:     if (random != null)
  71:       attributes.put(RSAKeyPairGenerator.SOURCE_OF_RANDOMNESS, random);
  72: 
  73:     attributes.put(RSAKeyPairGenerator.PREFERRED_ENCODING_FORMAT,
  74:                    Integer.valueOf(Registry.ASN1_ENCODING_ID));
  75:     adaptee.setup(attributes);
  76:   }
  77: 
  78:   public void initialize(AlgorithmParameterSpec params, SecureRandom random)
  79:       throws InvalidAlgorithmParameterException
  80:   {
  81:     HashMap attributes = new HashMap();
  82:     if (params != null)
  83:       {
  84:         if (! (params instanceof RSAKeyGenParameterSpec))
  85:           throw new InvalidAlgorithmParameterException("params");
  86: 
  87:         attributes.put(RSAKeyPairGenerator.RSA_PARAMETERS, params);
  88:       }
  89:     if (random != null)
  90:       attributes.put(RSAKeyPairGenerator.SOURCE_OF_RANDOMNESS, random);
  91: 
  92:     attributes.put(RSAKeyPairGenerator.PREFERRED_ENCODING_FORMAT,
  93:                    Integer.valueOf(Registry.ASN1_ENCODING_ID));
  94:     adaptee.setup(attributes);
  95:   }
  96: }