gcc/libjava/java/security/spec/RSAOtherPrimeInfo.java

/* RSAOtherPrimeInfo.java --
   Copyright (C) 2003, Free Software Foundation, Inc.

This file is part of GNU Classpath.

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package java.security.spec;

import java.math.BigInteger;

/**
 * This class represents the triplet (prime, exponent, and coefficient) inside
 * RSA's OtherPrimeInfo structure, as defined in the PKCS#1 v2.1. The ASN.1
 * syntax of RSA's OtherPrimeInfo is as follows:
 *
 * <pre>
 *  OtherPrimeInfo ::= SEQUENCE {
 *    prime INTEGER,
 *    exponent INTEGER,
 *    coefficient INTEGER
 *  }
 * </pre>
 *
 * @since 1.4
 * @see RSAPrivateCrtKeySpec
 * @see java.security.interfaces.RSAMultiPrimePrivateCrtKey
 */
public class RSAOtherPrimeInfo
{
  // Constants and fields
  // --------------------------------------------------------------------------

  private BigInteger prime;
  private BigInteger primeExponent;
  private BigInteger crtCoefficient;

  // Constructor(s)
  // --------------------------------------------------------------------------

  /**
   * Creates a new <code>RSAOtherPrimeInfo</code> given the prime,
   * primeExponent, and crtCoefficient as defined in PKCS#1.
   *
   * @param prime the prime factor of n.
   * @param primeExponent the exponent.
   * @param crtCoefficient the Chinese Remainder Theorem coefficient.
   * @throws NullPointerException if any of the parameters, i.e. prime,
   * primeExponent, crtCoefficient, is <code>null</code>.
   */
  public RSAOtherPrimeInfo(BigInteger prime, BigInteger primeExponent,
                           BigInteger crtCoefficient)
  {
    super();

    if (prime == null)
      throw new NullPointerException("prime");
    if (primeExponent == null)
      throw new NullPointerException("primeExponent");
    if (crtCoefficient == null)
      throw new NullPointerException("crtCoefficient");

    this.prime = prime;
    this.primeExponent = primeExponent;
    this.crtCoefficient = crtCoefficient;
  }

  // Class methods
  // --------------------------------------------------------------------------

  // Instance methods
  // --------------------------------------------------------------------------

  /**
   * Returns the prime.
   *
   * @return the prime.
   */
  public final BigInteger getPrime()
  {
    return this.prime;
  }

  /**
   * Returns the prime's exponent.
   *
   * @return the primeExponent.
   */
  public final BigInteger getExponent()
  {
    return this.primeExponent;
  }

  /**
   * Returns the prime's crtCoefficient.
   *
   * @return the crtCoefficient.
   */
  public final BigInteger getCrtCoefficient()
  {
    return this.crtCoefficient;
  }
}