Initial Commit

iTechSharp/srcbc/crypto/parameters/ElGamalParameters.cs

@@ -0,0 +1,81 @@
+using System;
+
+using Org.BouncyCastle.Math;
+
+namespace Org.BouncyCastle.Crypto.Parameters
+{
+    public class ElGamalParameters
+		: ICipherParameters
+    {
+        private readonly BigInteger p, g;
+		private readonly int l;
+
+		public ElGamalParameters(
+            BigInteger	p,
+            BigInteger	g)
+			: this(p, g, 0)
+        {
+        }
+
+		public ElGamalParameters(
+			BigInteger	p,
+			BigInteger	g,
+			int			l)
+		{
+			if (p == null)
+				throw new ArgumentNullException("p");
+			if (g == null)
+				throw new ArgumentNullException("g");
+
+			this.p = p;
+			this.g = g;
+			this.l = l;
+		}
+
+		public BigInteger P
+        {
+            get { return p; }
+        }
+
+		/**
+        * return the generator - g
+        */
+        public BigInteger G
+        {
+            get { return g; }
+        }
+
+		/**
+		 * return private value limit - l
+		 */
+		public int L
+		{
+			get { return l; }
+		}
+
+		public override bool Equals(
+            object obj)
+        {
+			if (obj == this)
+				return true;
+
+			ElGamalParameters other = obj as ElGamalParameters;
+
+			if (other == null)
+				return false;
+
+			return Equals(other);
+        }
+
+		protected bool Equals(
+			ElGamalParameters other)
+		{
+			return p.Equals(other.p) && g.Equals(other.g) && l == other.l;
+		}
+
+		public override int GetHashCode()
+        {
+            return p.GetHashCode() ^ g.GetHashCode() ^ l;
+        }
+    }
+}