gomp-20050608-branch/libjava/classpath/java/security/spec/RSAMultiPrimePrivateCrtKeySpec.java

   1 /* PSSParameterSpec.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.
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  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.
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  16 You should have received a copy of the GNU General Public License
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  18 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  19 02110-1301 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
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  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
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  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
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  34 this exception to your version of the library, but you are not
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  36 exception statement from your version. */
  37
  38 package java.security.spec;
  39
  40 import java.math.BigInteger;
  41
  42 /**
  43  * This class specifies an RSA multi-prime private key, as defined in the
  44  * PKCS#1 v2.1, using the <i>Chinese Remainder Theorem</i> (CRT) information
  45  * values for efficiency.
  46  *
  47  * @since 1.4
  48  * @see java.security.Key
  49  * @see java.security.KeyFactory
  50  * @see KeySpec
  51  * @see PKCS8EncodedKeySpec
  52  * @see RSAPrivateKeySpec
  53  * @see RSAPublicKeySpec
  54  * @see RSAOtherPrimeInfo
  55  */
  56 public class RSAMultiPrimePrivateCrtKeySpec extends RSAPrivateKeySpec
  57 {
  58   // Constants and fields
  59   // --------------------------------------------------------------------------
  60
  61   private BigInteger publicExponent;
  62   private BigInteger primeP;
  63   private BigInteger primeQ;
  64   private BigInteger primeExponentP;
  65   private BigInteger primeExponentQ;
  66   private BigInteger crtCoefficient;
  67   private RSAOtherPrimeInfo[] otherPrimeInfo;
  68
  69   // Constructor(s)
  70   // --------------------------------------------------------------------------
  71
  72   /**
  73    * <p>Creates a new <code>RSAMultiPrimePrivateCrtKeySpec</code> given the
  74    * modulus, publicExponent, privateExponent, primeP, primeQ, primeExponentP,
  75    * primeExponentQ, crtCoefficient, and otherPrimeInfo as defined in PKCS#1
  76    * v2.1.</p>
  77    *
  78    * <p>Note that <code>otherPrimeInfo</code> is cloned when constructing this
  79    * object.</p>
  80    *
  81    * @param modulus the modulus n.
  82    * @param publicExponent the public exponent e.
  83    * @param privateExponent the private exponent d.
  84    * @param primeP the prime factor p of n.
  85    * @param primeQ the prime factor q of n.
  86    * @param primeExponentP this is d mod (p-1).
  87    * @param primeExponentQ this is d mod (q-1).
  88    * @param crtCoefficient the Chinese Remainder Theorem coefficient q-1 mod p.
  89    * @param otherPrimeInfo triplets of the rest of primes, <code>null</code>
  90    * can be specified if there are only two prime factors (p and q).
  91    * @throws NullPointerException if any of the parameters, i.e. modulus,
  92    * publicExponent, privateExponent, primeP, primeQ, primeExponentP,
  93    * primeExponentQ, crtCoefficient, is <code>null</code>.
  94    * @throws IllegalArgumentException if an empty, i.e. 0-length,
  95    * otherPrimeInfo is specified.
  96    */
  97   public RSAMultiPrimePrivateCrtKeySpec(BigInteger modulus,
  98                                         BigInteger publicExponent,
  99                                         BigInteger privateExponent,
 100                                         BigInteger primeP,
 101                                         BigInteger primeQ,
 102                                         BigInteger primeExponentP,
 103                                         BigInteger primeExponentQ,
 104                                         BigInteger crtCoefficient,
 105                                         RSAOtherPrimeInfo[] otherPrimeInfo)
 106   {
 107     super(modulus, privateExponent);
 108
 109     if (modulus == null)
 110       throw new NullPointerException("modulus");
 111     if (publicExponent == null)
 112       throw new NullPointerException("publicExponent");
 113     if (privateExponent == null)
 114       throw new NullPointerException("privateExponent");
 115     if (primeP == null)
 116       throw new NullPointerException("primeP");
 117     if (primeQ == null)
 118       throw new NullPointerException("primeQ");
 119     if (primeExponentP == null)
 120       throw new NullPointerException("primeExponentP");
 121     if (primeExponentQ == null)
 122       throw new NullPointerException("primeExponentQ");
 123     if (crtCoefficient == null)
 124       throw new NullPointerException("crtCoefficient");
 125     if (otherPrimeInfo != null)
 126       if (otherPrimeInfo.length == 0)
 127         throw new IllegalArgumentException();
 128       else
 129         this.otherPrimeInfo = (RSAOtherPrimeInfo[]) otherPrimeInfo.clone();
 130
 131     this.publicExponent = publicExponent;
 132     this.primeP = primeP;
 133     this.primeQ = primeQ;
 134     this.primeExponentP = primeExponentP;
 135     this.primeExponentQ = primeExponentQ;
 136     this.crtCoefficient = crtCoefficient;
 137   }
 138
 139   // Class methods
 140   // --------------------------------------------------------------------------
 141
 142   // Instance methods
 143   // --------------------------------------------------------------------------
 144
 145   /**
 146    * Returns the public exponent.
 147    *
 148    * @return the public exponent.
 149    */
 150   public BigInteger getPublicExponent()
 151   {
 152     return this.publicExponent;
 153   }
 154
 155   /**
 156    * Returns the primeP.
 157    *
 158    * @return the primeP.
 159    */
 160   public BigInteger getPrimeP()
 161   {
 162     return this.primeP;
 163   }
 164
 165   /**
 166    * Returns the primeQ.
 167    *
 168    * @return the primeQ.
 169    */
 170   public BigInteger getPrimeQ()
 171   {
 172     return this.primeQ;
 173   }
 174
 175   /**
 176    * Returns the primeExponentP.
 177    *
 178    * @return the primeExponentP.
 179    */
 180   public BigInteger getPrimeExponentP()
 181   {
 182     return this.primeExponentP;
 183   }
 184
 185   /**
 186    * Returns the primeExponentQ.
 187    *
 188    * @return the primeExponentQ.
 189    */
 190   public BigInteger getPrimeExponentQ()
 191   {
 192     return this.primeExponentQ;
 193   }
 194
 195   /**
 196    * Returns the crtCoefficient.
 197    *
 198    * @return the crtCoefficient.
 199    */
 200   public BigInteger getCrtCoefficient()
 201   {
 202     return this.crtCoefficient;
 203   }
 204
 205   /**
 206    * Returns a copy of the otherPrimeInfo or <code>null</code> if there are
 207    * only two prime factors (p and q).
 208    *
 209    * @return the otherPrimeInfo.
 210    */
 211   public RSAOtherPrimeInfo[] getOtherPrimeInfo()
 212   {
 213     return this.otherPrimeInfo == null
 214         ? null
 215         : (RSAOtherPrimeInfo[]) this.otherPrimeInfo.clone();
 216   }
 217 }