Initial Commit

iTechSharp/srcbc/asn1/cryptopro/GOST28147Parameters.cs

@@ -0,0 +1,63 @@
+using System;
+using System.Collections;
+
+using Org.BouncyCastle.Asn1;
+
+namespace Org.BouncyCastle.Asn1.CryptoPro
+{
+    public class Gost28147Parameters
+        : Asn1Encodable
+    {
+        private readonly Asn1OctetString iv;
+        private readonly DerObjectIdentifier paramSet;
+
+		public static Gost28147Parameters GetInstance(
+            Asn1TaggedObject	obj,
+            bool				explicitly)
+        {
+            return GetInstance(Asn1Sequence.GetInstance(obj, explicitly));
+        }
+
+		public static Gost28147Parameters GetInstance(
+            object obj)
+        {
+            if (obj == null || obj is Gost28147Parameters)
+            {
+                return (Gost28147Parameters) obj;
+            }
+
+            if (obj is Asn1Sequence)
+            {
+                return new Gost28147Parameters((Asn1Sequence) obj);
+            }
+
+			throw new ArgumentException("Invalid GOST3410Parameter: " + obj.GetType().Name);
+        }
+
+        private Gost28147Parameters(
+            Asn1Sequence seq)
+        {
+			if (seq.Count != 2)
+				throw new ArgumentException("Wrong number of elements in sequence", "seq");
+
+			this.iv = Asn1OctetString.GetInstance(seq[0]);
+			this.paramSet = DerObjectIdentifier.GetInstance(seq[1]);
+        }
+
+		/**
+         * <pre>
+         * Gost28147-89-Parameters ::=
+         *               SEQUENCE {
+         *                       iv                   Gost28147-89-IV,
+         *                       encryptionParamSet   OBJECT IDENTIFIER
+         *                }
+         *
+         *   Gost28147-89-IV ::= OCTET STRING (SIZE (8))
+         * </pre>
+         */
+        public override Asn1Object ToAsn1Object()
+        {
+			return new DerSequence(iv, paramSet);
+        }
+    }
+}