libjava/java/security/spec/RSAOtherPrimeInfo.java

   1 /* RSAOtherPrimeInfo.java --
   2    Copyright (C) 2003, 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 package java.security.spec;
  39
  40 import java.math.BigInteger;
  41
  42 /**
  43  * This class represents the triplet (prime, exponent, and coefficient) inside
  44  * RSA's OtherPrimeInfo structure, as defined in the PKCS#1 v2.1. The ASN.1
  45  * syntax of RSA's OtherPrimeInfo is as follows:
  46  *
  47  * <pre>
  48  *  OtherPrimeInfo ::= SEQUENCE {
  49  *    prime INTEGER,
  50  *    exponent INTEGER,
  51  *    coefficient INTEGER
  52  *  }
  53  * </pre>
  54  *
  55  * @since 1.4
  56  * @see RSAPrivateCrtKeySpec
  57  * @see java.security.interfaces.RSAMultiPrimePrivateCrtKey
  58  */
  59 public class RSAOtherPrimeInfo
  60 {
  61   // Constants and fields
  62   // --------------------------------------------------------------------------
  63
  64   private BigInteger prime;
  65   private BigInteger primeExponent;
  66   private BigInteger crtCoefficient;
  67
  68   // Constructor(s)
  69   // --------------------------------------------------------------------------
  70
  71   /**
  72    * Creates a new <code>RSAOtherPrimeInfo</code> given the prime,
  73    * primeExponent, and crtCoefficient as defined in PKCS#1.
  74    *
  75    * @param prime the prime factor of n.
  76    * @param primeExponent the exponent.
  77    * @param crtCoefficient the Chinese Remainder Theorem coefficient.
  78    * @throws NullPointerException if any of the parameters, i.e. prime,
  79    * primeExponent, crtCoefficient, is <code>null</code>.
  80    */
  81   public RSAOtherPrimeInfo(BigInteger prime, BigInteger primeExponent,
  82                            BigInteger crtCoefficient)
  83   {
  84     super();
  85
  86     if (prime == null)
  87       throw new NullPointerException("prime");
  88     if (primeExponent == null)
  89       throw new NullPointerException("primeExponent");
  90     if (crtCoefficient == null)
  91       throw new NullPointerException("crtCoefficient");
  92
  93     this.prime = prime;
  94     this.primeExponent = primeExponent;
  95     this.crtCoefficient = crtCoefficient;
  96   }
  97
  98   // Class methods
  99   // --------------------------------------------------------------------------
 100
 101   // Instance methods
 102   // --------------------------------------------------------------------------
 103
 104   /**
 105    * Returns the prime.
 106    *
 107    * @return the prime.
 108    */
 109   public final BigInteger getPrime()
 110   {
 111     return this.prime;
 112   }
 113
 114   /**
 115    * Returns the prime's exponent.
 116    *
 117    * @return the primeExponent.
 118    */
 119   public final BigInteger getExponent()
 120   {
 121     return this.primeExponent;
 122   }
 123
 124   /**
 125    * Returns the prime's crtCoefficient.
 126    *
 127    * @return the crtCoefficient.
 128    */
 129   public final BigInteger getCrtCoefficient()
 130   {
 131     return this.crtCoefficient;
 132   }
 133 }