Initial Commit

iTechSharp/srcbc/asn1/cms/KeyAgreeRecipientIdentifier.cs

@@ -0,0 +1,90 @@
+using System;
+
+namespace Org.BouncyCastle.Asn1.Cms
+{
+	public class KeyAgreeRecipientIdentifier
+		: Asn1Encodable
+	{
+		/**
+		 * return an KeyAgreeRecipientIdentifier object from a tagged object.
+		 *
+		 * @param obj the tagged object holding the object we want.
+		 * @param isExplicit true if the object is meant to be explicitly
+		 *              tagged false otherwise.
+		 * @exception ArgumentException if the object held by the
+		 *          tagged object cannot be converted.
+		 */
+		public static KeyAgreeRecipientIdentifier GetInstance(
+			Asn1TaggedObject	obj,
+			bool				isExplicit)
+		{
+			return GetInstance(Asn1Sequence.GetInstance(obj, isExplicit));
+		}
+    
+		/**
+		 * return an KeyAgreeRecipientIdentifier object from the given object.
+		 *
+		 * @param obj the object we want converted.
+		 * @exception ArgumentException if the object cannot be converted.
+		 */
+		public static KeyAgreeRecipientIdentifier GetInstance(
+			object obj)
+		{
+			if (obj == null || obj is KeyAgreeRecipientIdentifier)
+			{
+				return (KeyAgreeRecipientIdentifier)obj;
+			}
+
+			if (obj is Asn1Sequence)
+			{
+				return new KeyAgreeRecipientIdentifier((Asn1Sequence)obj);
+			}
+
+			throw new ArgumentException("Invalid KeyAgreeRecipientIdentifier: " + obj.GetType().FullName, "obj");
+		} 
+
+		private readonly IssuerAndSerialNumber issuerSerial;
+		private const RecipientKeyIdentifier rKeyID = null;
+
+		public KeyAgreeRecipientIdentifier(
+			IssuerAndSerialNumber issuerSerial)
+		{
+			this.issuerSerial = issuerSerial;
+		}
+
+		private KeyAgreeRecipientIdentifier(
+			Asn1Sequence seq)
+		{
+			this.issuerSerial = IssuerAndSerialNumber.GetInstance(seq);
+		}
+
+		public IssuerAndSerialNumber IssuerAndSerialNumber
+		{
+			get { return issuerSerial; }
+		}
+
+		public RecipientKeyIdentifier RKeyID
+		{
+			get { return rKeyID; }
+		}
+
+		/** 
+		 * Produce an object suitable for an Asn1OutputStream.
+		 * <pre>
+		 * KeyAgreeRecipientIdentifier ::= CHOICE {
+		 *     issuerAndSerialNumber IssuerAndSerialNumber,
+		 *     rKeyId [0] IMPLICIT RecipientKeyIdentifier
+		 * }
+		 * </pre>
+		 */
+		public override Asn1Object ToAsn1Object()
+		{
+			if (issuerSerial != null)
+			{
+				return issuerSerial.ToAsn1Object();
+			}
+
+			return new DerTaggedObject(false, 0, rKeyID);
+		}
+	}
+}