Initial Commit

iTechSharp/srcbc/asn1/cms/RecipientEncryptedKey.cs

@@ -0,0 +1,88 @@
+using System;
+
+namespace Org.BouncyCastle.Asn1.Cms
+{
+	public class RecipientEncryptedKey
+		: Asn1Encodable
+	{
+		private readonly KeyAgreeRecipientIdentifier identifier;
+		private readonly Asn1OctetString encryptedKey;
+
+		private RecipientEncryptedKey(
+			Asn1Sequence seq)
+		{
+			identifier = KeyAgreeRecipientIdentifier.GetInstance(seq[0]);
+			encryptedKey = (Asn1OctetString) seq[1];
+		}
+
+		/**
+		 * return an RecipientEncryptedKey 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 RecipientEncryptedKey GetInstance(
+			Asn1TaggedObject	obj,
+			bool				isExplicit)
+		{
+			return GetInstance(Asn1Sequence.GetInstance(obj, isExplicit));
+		}
+
+		/**
+		 * return a RecipientEncryptedKey object from the given object.
+		 *
+		 * @param obj the object we want converted.
+		 * @exception ArgumentException if the object cannot be converted.
+		 */
+		public static RecipientEncryptedKey GetInstance(
+			object obj)
+		{
+			if (obj == null || obj is RecipientEncryptedKey)
+			{
+				return (RecipientEncryptedKey) obj;
+			}
+
+			if (obj is Asn1Sequence)
+			{
+				return new RecipientEncryptedKey((Asn1Sequence) obj);
+			}
+
+			throw new ArgumentException("Invalid RecipientEncryptedKey: " + obj.GetType().FullName, "obj");
+		}
+
+		public RecipientEncryptedKey(
+			KeyAgreeRecipientIdentifier	id,
+			Asn1OctetString				encryptedKey)
+		{
+			this.identifier = id;
+			this.encryptedKey = encryptedKey;
+		}
+
+		public KeyAgreeRecipientIdentifier Identifier
+		{
+			get { return identifier; }
+		}
+
+		public Asn1OctetString EncryptedKey
+		{
+			get { return encryptedKey; }
+		}
+
+		/** 
+		 * Produce an object suitable for an Asn1OutputStream.
+		 * <pre>
+		 * RecipientEncryptedKey ::= SEQUENCE {
+		 *     rid KeyAgreeRecipientIdentifier,
+		 *     encryptedKey EncryptedKey
+		 * }
+		 * </pre>
+		 */
+		public override Asn1Object ToAsn1Object()
+		{
+			return new DerSequence(identifier, encryptedKey);
+		}
+	}
+}