Initial Commit

iTechSharp/srcbc/asn1/pkcs/PBKDF2Params.cs

@@ -0,0 +1,85 @@
+using System;
+using System.Collections;
+
+using Org.BouncyCastle.Asn1;
+using Org.BouncyCastle.Math;
+
+namespace Org.BouncyCastle.Asn1.Pkcs
+{
+    public class Pbkdf2Params
+		: Asn1Encodable
+    {
+        internal Asn1OctetString	octStr;
+        internal DerInteger			iterationCount;
+        internal DerInteger			keyLength;
+
+		public static Pbkdf2Params GetInstance(
+            object obj)
+        {
+            if (obj is Pbkdf2Params || obj == null)
+            {
+                return (Pbkdf2Params) obj;
+            }
+
+			if (obj is Asn1Sequence)
+            {
+                return new Pbkdf2Params((Asn1Sequence) obj);
+            }
+
+			throw new ArgumentException("Unknown object in factory: " + obj.GetType().FullName, "obj");
+		}
+
+		public Pbkdf2Params(
+			Asn1Sequence seq)
+        {
+            IEnumerator e = seq.GetEnumerator();
+
+			e.MoveNext();
+            octStr = (Asn1OctetString) e.Current;
+
+			e.MoveNext();
+            iterationCount = (DerInteger) e.Current;
+
+			if (e.MoveNext())
+            {
+                keyLength = (DerInteger) e.Current;
+            }
+        }
+
+        public Pbkdf2Params(
+            byte[] salt,
+            int iterationCount)
+        {
+            this.octStr = new DerOctetString(salt);
+            this.iterationCount = new DerInteger(iterationCount);
+        }
+
+		public byte[] GetSalt()
+        {
+            return octStr.GetOctets();
+        }
+
+		public BigInteger IterationCount
+		{
+			get { return iterationCount.Value; }
+		}
+
+		public BigInteger KeyLength
+		{
+			get { return keyLength == null ? null : keyLength.Value; }
+        }
+
+		public override Asn1Object ToAsn1Object()
+        {
+            Asn1EncodableVector v = new Asn1EncodableVector(
+				octStr, iterationCount);
+
+			if (keyLength != null)
+            {
+                v.Add(keyLength);
+            }
+
+			return new DerSequence(v);
+        }
+    }
+}