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 }