Initial Commit

iTechSharp/srcbc/asn1/cryptopro/GOST3410ParamSetParameters.cs

@@ -0,0 +1,87 @@
+using System;
+using System.Collections;
+
+using Org.BouncyCastle.Asn1;
+using Org.BouncyCastle.Math;
+
+namespace Org.BouncyCastle.Asn1.CryptoPro
+{
+    public class Gost3410ParamSetParameters
+        : Asn1Encodable
+    {
+        private readonly int keySize;
+        private readonly DerInteger	p, q, a;
+
+		public static Gost3410ParamSetParameters GetInstance(
+            Asn1TaggedObject	obj,
+            bool				explicitly)
+        {
+            return GetInstance(Asn1Sequence.GetInstance(obj, explicitly));
+        }
+
+		public static Gost3410ParamSetParameters GetInstance(
+            object obj)
+        {
+            if (obj == null || obj is Gost3410ParamSetParameters)
+            {
+                return (Gost3410ParamSetParameters) obj;
+            }
+
+			if (obj is Asn1Sequence)
+            {
+                return new Gost3410ParamSetParameters((Asn1Sequence) obj);
+            }
+
+			throw new ArgumentException("Invalid GOST3410Parameter: " + obj.GetType().Name);
+        }
+
+		public Gost3410ParamSetParameters(
+            int			keySize,
+            BigInteger	p,
+            BigInteger	q,
+            BigInteger	a)
+        {
+            this.keySize = keySize;
+            this.p = new DerInteger(p);
+            this.q = new DerInteger(q);
+            this.a = new DerInteger(a);
+        }
+
+		private Gost3410ParamSetParameters(
+            Asn1Sequence seq)
+        {
+			if (seq.Count != 4)
+				throw new ArgumentException("Wrong number of elements in sequence", "seq");
+
+			this.keySize = DerInteger.GetInstance(seq[0]).Value.IntValue;
+			this.p = DerInteger.GetInstance(seq[1]);
+            this.q = DerInteger.GetInstance(seq[2]);
+			this.a = DerInteger.GetInstance(seq[3]);
+        }
+
+		public int KeySize
+		{
+			get { return keySize; }
+		}
+
+		public BigInteger P
+		{
+			get { return p.PositiveValue; }
+		}
+
+		public BigInteger Q
+		{
+			get { return q.PositiveValue; }
+		}
+
+		public BigInteger A
+		{
+			get { return a.PositiveValue; }
+		}
+
+		public override Asn1Object ToAsn1Object()
+        {
+			return new DerSequence(new DerInteger(keySize), p, q, a);
+        }
+    }
+}