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

   1: /* KeyPairGeneratorAdapter.java --
   2:    Copyright 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.key.IKeyPairGenerator;
  42: import gnu.java.security.key.KeyPairGeneratorFactory;
  43: 
  44: import java.security.InvalidAlgorithmParameterException;
  45: import java.security.KeyPair;
  46: import java.security.KeyPairGenerator;
  47: import java.security.SecureRandom;
  48: import java.security.spec.AlgorithmParameterSpec;
  49: 
  50: /**
  51:  * The implementation of a generic {@link java.security.KeyPairGenerator}
  52:  * adapter class to wrap GNU keypair generator instances.
  53:  * <p>
  54:  * This class defines the <i>Service Provider Interface</i> (<b>SPI</b>) for
  55:  * the {@link java.security.KeyPairGenerator} class, which is used to generate
  56:  * pairs of public and private keys.
  57:  * <p>
  58:  * All the abstract methods in the {@link java.security.KeyPairGeneratorSpi}
  59:  * class are implemented by this class and all its sub-classes.
  60:  * <p>
  61:  * In case the client does not explicitly initialize the KeyPairGenerator (via a
  62:  * call to an <code>initialize()</code> method), the GNU provider supplies
  63:  * (and document) default values to be used. For example, the GNU provider uses
  64:  * a default <i>modulus</i> size (keysize) of 1024 bits for the DSS (Digital
  65:  * Signature Standard) a.k.a <i>DSA</i>.
  66:  */
  67: public abstract class KeyPairGeneratorAdapter
  68:     extends KeyPairGenerator
  69: {
  70:   /** Our underlying keypair instance. */
  71:   protected IKeyPairGenerator adaptee;
  72: 
  73:   /**
  74:    * Trivial protected constructor.
  75:    *
  76:    * @param kpgName the canonical name of the keypair generator algorithm.
  77:    */
  78:   protected KeyPairGeneratorAdapter(String kpgName)
  79:   {
  80:     super(kpgName);
  81: 
  82:     this.adaptee = KeyPairGeneratorFactory.getInstance(kpgName);
  83:   }
  84: 
  85:   public abstract void initialize(int keysize, SecureRandom random);
  86: 
  87:   public abstract void initialize(AlgorithmParameterSpec params,
  88:                                   SecureRandom random)
  89:       throws InvalidAlgorithmParameterException;
  90: 
  91:   public KeyPair generateKeyPair()
  92:   {
  93:     return adaptee.generate();
  94:   }
  95: }