NaccacheSternPrivateKeyParameters.cs :  » PDF » iTextSharp » Org » BouncyCastle » Crypto » Parameters » C# / CSharp Open Source

using System;
using System.Collections;

using Org.BouncyCastle.Math;

namespace Org.BouncyCastle.Crypto.Parameters{
  /**
   * Private key parameters for NaccacheStern cipher. For details on this cipher,
   * please see
   *
   * http://www.gemplus.com/smart/rd/publications/pdf/NS98pkcs.pdf
   */
  public class NaccacheSternPrivateKeyParameters : NaccacheSternKeyParameters
  {
    private readonly BigInteger phiN;
    private readonly ArrayList smallPrimes;

    /**
     * Constructs a NaccacheSternPrivateKey
     *
     * @param g
     *            the public enryption parameter g
     * @param n
     *            the public modulus n = p*q
     * @param lowerSigmaBound
     *            the public lower sigma bound up to which data can be encrypted
     * @param smallPrimes
     *            the small primes, of which sigma is constructed in the right
     *            order
     * @param phi_n
     *            the private modulus phi(n) = (p-1)(q-1)
     */
    public NaccacheSternPrivateKeyParameters(
      BigInteger  g,
      BigInteger  n,
      int      lowerSigmaBound,
      ArrayList  smallPrimes,
      BigInteger  phiN)
      : base(true, g, n, lowerSigmaBound)
    {
      this.smallPrimes = smallPrimes;
      this.phiN = phiN;
    }

    public BigInteger PhiN
    {
      get { return phiN; }
    }

    public ArrayList SmallPrimes
    {
      get { return smallPrimes; }
    }
  }
}