Initial Commit

iTechSharp/srcbc/crypto/parameters/NaccacheSternPrivateKeyParameters.cs

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+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; }
+		}
+	}
+}