1 files changed, 96 insertions, 0 deletions
diff --git a/Crypto/src/asn1/pkcs/MacData.cs b/Crypto/src/asn1/pkcs/MacData.cs
new file mode 100644
index 000000000..780b24153
--- /dev/null
+++ b/Crypto/src/asn1/pkcs/MacData.cs
@@ -0,0 +1,96 @@
+using System;
+
+using Org.BouncyCastle.Asn1;
+using Org.BouncyCastle.Asn1.X509;
+using Org.BouncyCastle.Math;
+
+namespace Org.BouncyCastle.Asn1.Pkcs
+{
+    public class MacData
+        : Asn1Encodable
+    {
+        internal DigestInfo	digInfo;
+        internal byte[]		salt;
+        internal BigInteger	iterationCount;
+
+		public static MacData GetInstance(
+            object obj)
+        {
+            if (obj is MacData)
+            {
+                return (MacData) obj;
+            }
+
+			if (obj is Asn1Sequence)
+            {
+                return new MacData((Asn1Sequence) obj);
+            }
+
+			throw new ArgumentException("Unknown object in factory: " + obj.GetType().FullName, "obj");
+		}
+
+		private MacData(
+            Asn1Sequence seq)
+        {
+            this.digInfo = DigestInfo.GetInstance(seq[0]);
+            this.salt = ((Asn1OctetString) seq[1]).GetOctets();
+
+			if (seq.Count == 3)
+            {
+                this.iterationCount = ((DerInteger) seq[2]).Value;
+            }
+            else
+            {
+                this.iterationCount = BigInteger.One;
+            }
+        }
+
+		public MacData(
+            DigestInfo	digInfo,
+            byte[]		salt,
+            int			iterationCount)
+        {
+            this.digInfo = digInfo;
+            this.salt = (byte[]) salt.Clone();
+            this.iterationCount = BigInteger.ValueOf(iterationCount);
+        }
+
+		public DigestInfo Mac
+		{
+			get { return digInfo; }
+		}
+
+		public byte[] GetSalt()
+        {
+            return (byte[]) salt.Clone();
+        }
+
+		public BigInteger IterationCount
+		{
+			get { return iterationCount; }
+		}
+
+		/**
+		 * <pre>
+		 * MacData ::= SEQUENCE {
+		 *     mac      DigestInfo,
+		 *     macSalt  OCTET STRING,
+		 *     iterations INTEGER DEFAULT 1
+		 *     -- Note: The default is for historic reasons and its use is deprecated. A
+		 *     -- higher value, like 1024 is recommended.
+		 * </pre>
+		 * @return the basic DERObject construction.
+		 */
+		public override Asn1Object ToAsn1Object()
+        {
+			Asn1EncodableVector v = new Asn1EncodableVector(digInfo, new DerOctetString(salt));
+
+			if (!iterationCount.Equals(BigInteger.One))
+			{
+				v.Add(new DerInteger(iterationCount));
+			}
+
+			return new DerSequence(v);
+        }
+    }
+}