001    /* RSAKeyGenParameterSpec.java --- RSA Key Generator Parameter Spec Class
002       Copyright (C) 1999 Free Software Foundation, Inc.
003    
004    This file is part of GNU Classpath.
005    
006    GNU Classpath is free software; you can redistribute it and/or modify
007    it under the terms of the GNU General Public License as published by
008    the Free Software Foundation; either version 2, or (at your option)
009    any later version.
010     
011    GNU Classpath is distributed in the hope that it will be useful, but
012    WITHOUT ANY WARRANTY; without even the implied warranty of
013    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
014    General Public License for more details.
015    
016    You should have received a copy of the GNU General Public License
017    along with GNU Classpath; see the file COPYING.  If not, write to the
018    Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
019    02110-1301 USA.
020    
021    Linking this library statically or dynamically with other modules is
022    making a combined work based on this library.  Thus, the terms and
023    conditions of the GNU General Public License cover the whole
024    combination.
025    
026    As a special exception, the copyright holders of this library give you
027    permission to link this library with independent modules to produce an
028    executable, regardless of the license terms of these independent
029    modules, and to copy and distribute the resulting executable under
030    terms of your choice, provided that you also meet, for each linked
031    independent module, the terms and conditions of the license of that
032    module.  An independent module is a module which is not derived from
033    or based on this library.  If you modify this library, you may extend
034    this exception to your version of the library, but you are not
035    obligated to do so.  If you do not wish to do so, delete this
036    exception statement from your version. */
037    
038    
039    package java.security.spec;
040    import java.math.BigInteger;
041    
042    /**
043       This class generates a set of RSA Key parameters used in the generation
044       of RSA keys.
045    
046       @since JDK 1.3
047    
048       @author Mark Benvenuto
049    */
050    public class RSAKeyGenParameterSpec implements AlgorithmParameterSpec
051    {
052      private int keysize;
053      private BigInteger publicExponent;
054    
055      /**
056         Public Exponent F0 = 3
057      */
058      public static final BigInteger F0 = BigInteger.valueOf(3);
059    
060      /**
061         Public Exponent F4 = 3
062      */
063      public static final BigInteger F4 = BigInteger.valueOf(65537L);
064    
065      /**
066         Create a new RSAKeyGenParameterSpec to store the RSA key's keysize 
067         and public exponent
068    
069         @param keysize Modulus size of key in bits
070         @param publicExponent - the exponent
071      */
072      public RSAKeyGenParameterSpec(int keysize, BigInteger publicExponent)
073      {
074        this.keysize = keysize;
075        this.publicExponent = publicExponent;
076      }
077        
078      /**
079         Return the size of the key.
080    
081         @return the size of the key.
082      */
083      public int getKeysize()
084      {
085        return keysize;
086      }
087        
088      /**
089         Return the public exponent.
090    
091         @return the public exponent.
092      */
093      public BigInteger getPublicExponent()
094      {
095        return publicExponent;
096      }
097    }