001/* DHPrivateKeySpec.java -- Wrapper for Diffie-Hellman private keys.
002   Copyright (C) 2004  Free Software Foundation, Inc.
003
004This file is part of GNU Classpath.
005
006GNU Classpath is free software; you can redistribute it and/or modify
007it under the terms of the GNU General Public License as published by
008the Free Software Foundation; either version 2, or (at your option)
009any later version.
010
011GNU Classpath is distributed in the hope that it will be useful, but
012WITHOUT ANY WARRANTY; without even the implied warranty of
013MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
014General Public License for more details.
015
016You should have received a copy of the GNU General Public License
017along with GNU Classpath; see the file COPYING.  If not, write to the
018Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
01902110-1301 USA.
020
021Linking this library statically or dynamically with other modules is
022making a combined work based on this library.  Thus, the terms and
023conditions of the GNU General Public License cover the whole
024combination.
025
026As a special exception, the copyright holders of this library give you
027permission to link this library with independent modules to produce an
028executable, regardless of the license terms of these independent
029modules, and to copy and distribute the resulting executable under
030terms of your choice, provided that you also meet, for each linked
031independent module, the terms and conditions of the license of that
032module.  An independent module is a module which is not derived from
033or based on this library.  If you modify this library, you may extend
034this exception to your version of the library, but you are not
035obligated to do so.  If you do not wish to do so, delete this
036exception statement from your version. */
037
038
039package javax.crypto.spec;
040
041import java.math.BigInteger;
042import java.security.spec.KeySpec;
043
044/**
045 * A wrapper for Diffie-Hellman private key data.
046 *
047 * @author Casey Marshall (csm@gnu.org)
048 * @since 1.4
049 * @see DHPublicKeySpec
050 */
051public class DHPrivateKeySpec implements KeySpec
052{
053
054  // Variables.
055  // ------------------------------------------------------------------------
056
057  /** The base generator. */
058  private BigInteger g;
059
060  /** The prime modulus. */
061  private BigInteger p;
062
063  /** The private exponent. */
064  private BigInteger x;
065
066  // Constructors.
067  // ------------------------------------------------------------------------
068
069  /**
070   * Create a new Diffie-Hellman private key spec.
071   *
072   * @param x The private exponent.
073   * @param p The prime modulus.
074   * @param g The base generator.
075   */
076  public DHPrivateKeySpec(BigInteger x, BigInteger p, BigInteger g)
077  {
078    this.x = x;
079    this.p = p;
080    this.g = g;
081  }
082
083  // Instance methods.
084  // ------------------------------------------------------------------------
085
086  /**
087   * Get the base generator.
088   *
089   * @return The base generator.
090   */
091  public BigInteger getG()
092  {
093    return g;
094  }
095
096  /**
097   * Get the prime modulus.
098   *
099   * @return The prime modulus.
100   */
101  public BigInteger getP()
102  {
103    return p;
104  }
105
106  /**
107   * Get the private exponent.
108   *
109   * @return The private exponent.
110   */
111  public BigInteger getX()
112  {
113    return x;
114  }
115}