1 files changed, 81 insertions, 0 deletions
diff --git a/Crypto/src/asn1/isismtt/x509/Restriction.cs b/Crypto/src/asn1/isismtt/x509/Restriction.cs
new file mode 100644
index 000000000..c97766999
--- /dev/null
+++ b/Crypto/src/asn1/isismtt/x509/Restriction.cs
@@ -0,0 +1,81 @@
+using System;
+
+using Org.BouncyCastle.Asn1.X500;
+
+namespace Org.BouncyCastle.Asn1.IsisMtt.X509
+{
+	/**
+	* Some other restriction regarding the usage of this certificate.
+	* <p/>
+	* <pre>
+	*  RestrictionSyntax ::= DirectoryString (SIZE(1..1024))
+	* </pre>
+	*/
+	public class Restriction
+		: Asn1Encodable
+	{
+		private readonly DirectoryString restriction;
+
+		public static Restriction GetInstance(
+			object obj)
+		{
+			if (obj is Restriction)
+				return (Restriction) obj;
+
+			if (obj is IAsn1String)
+				return new Restriction(DirectoryString.GetInstance(obj));
+
+			throw new ArgumentException("Unknown object in GetInstance: " + obj.GetType().Name, "obj");
+		}
+
+		/**
+		* Constructor from DirectoryString.
+		* <p/>
+		* The DirectoryString is of type RestrictionSyntax:
+		* <p/>
+		* <pre>
+		*      RestrictionSyntax ::= DirectoryString (SIZE(1..1024))
+		* </pre>
+		*
+		* @param restriction A IAsn1String.
+		*/
+		private Restriction(
+			DirectoryString restriction)
+		{
+			this.restriction = restriction;
+		}
+
+		/**
+		* Constructor from a given details.
+		*
+		* @param restriction The description of the restriction.
+		*/
+		public Restriction(
+			string restriction)
+		{
+			this.restriction = new DirectoryString(restriction);
+		}
+
+		public virtual DirectoryString RestrictionString
+		{
+			get { return restriction; }
+		}
+
+		/**
+		* Produce an object suitable for an Asn1OutputStream.
+		* <p/>
+		* Returns:
+		* <p/>
+		* <pre>
+		*      RestrictionSyntax ::= DirectoryString (SIZE(1..1024))
+		* <p/>
+		* </pre>
+		*
+		* @return an Asn1Object
+		*/
+		public override Asn1Object ToAsn1Object()
+		{
+			return restriction.ToAsn1Object();
+		}
+	}
+}