toolchain/gcc/libjava/java/security/spec/RSAKeyGenParameterSpec.java

   1 /* RSAKeyGenParameterSpec.java --- RSA Key Generator Parameter Spec Class
   2    Copyright (C) 1999 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., 59 Temple Place, Suite 330, Boston, MA
  19 02111-1307 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 java.security.spec;
  40 import java.math.BigInteger;
  41
  42 /**
  43    This class generates a set of RSA Key parameters used in the generation
  44    of RSA keys.
  45
  46    @since JDK 1.3
  47
  48    @author Mark Benvenuto
  49 */
  50 public class RSAKeyGenParameterSpec implements AlgorithmParameterSpec
  51 {
  52   private int keysize;
  53   private BigInteger publicExponent;
  54
  55   /**
  56      Public Exponent F0 = 3
  57   */
  58   public static final BigInteger F0 = new BigInteger("3");
  59
  60   /**
  61      Public Exponent F4 = 3
  62   */
  63   public static final BigInteger F4 = new BigInteger("65537");
  64
  65   /**
  66      Create a new RSAKeyGenParameterSpec to store the RSA key's keysize
  67      and public exponent
  68
  69      @param keysize Modulus size of key in bits
  70      @param publicExponent - the exponent
  71   */
  72   public RSAKeyGenParameterSpec(int keysize, BigInteger publicExponent)
  73   {
  74     this.keysize = keysize;
  75     this.publicExponent = publicExponent;
  76   }
  77
  78   /**
  79      Return the size of the key.
  80
  81      @return the size of the key.
  82   */
  83   public int getKeysize()
  84   {
  85     return keysize;
  86   }
  87
  88   /**
  89      Return the public exponent.
  90
  91      @return the public exponent.
  92   */
  93   public BigInteger getPublicExponent()
  94   {
  95     return publicExponent;
  96   }
  97 }