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 }