Initial Commit

iTechSharp/srcbc/asn1/pkcs/EncryptedData.cs

@@ -0,0 +1,104 @@
+using System;
+
+using Org.BouncyCastle.Asn1.X509;
+
+namespace Org.BouncyCastle.Asn1.Pkcs
+{
+    /**
+     * The EncryptedData object.
+     * <pre>
+     *      EncryptedData ::= Sequence {
+     *           version Version,
+     *           encryptedContentInfo EncryptedContentInfo
+     *      }
+     *
+     *
+     *      EncryptedContentInfo ::= Sequence {
+     *          contentType ContentType,
+     *          contentEncryptionAlgorithm  ContentEncryptionAlgorithmIdentifier,
+     *          encryptedContent [0] IMPLICIT EncryptedContent OPTIONAL
+     *    }
+     *
+     *    EncryptedContent ::= OCTET STRING
+     * </pre>
+     */
+    public class EncryptedData
+        : Asn1Encodable
+    {
+        private readonly Asn1Sequence data;
+//        private readonly DerObjectIdentifier bagId;
+//        private readonly Asn1Object bagValue;
+
+		public static EncryptedData GetInstance(
+             object obj)
+        {
+			if (obj is EncryptedData)
+			{
+				return (EncryptedData) obj;
+			}
+
+			if (obj is Asn1Sequence)
+			{
+				return new EncryptedData((Asn1Sequence) obj);
+			}
+
+			throw new ArgumentException("Unknown object in factory: " + obj.GetType().FullName, "obj");
+		}
+
+		private EncryptedData(
+            Asn1Sequence seq)
+        {
+			if (seq.Count != 2)
+				throw new ArgumentException("Wrong number of elements in sequence", "seq");
+
+			int version = ((DerInteger) seq[0]).Value.IntValue;
+			if (version != 0)
+            {
+                throw new ArgumentException("sequence not version 0");
+            }
+
+			this.data = (Asn1Sequence) seq[1];
+        }
+
+		public EncryptedData(
+            DerObjectIdentifier	contentType,
+            AlgorithmIdentifier	encryptionAlgorithm,
+            Asn1Encodable		content)
+        {
+			data = new BerSequence(
+				contentType,
+				encryptionAlgorithm.ToAsn1Object(),
+				new BerTaggedObject(false, 0, content));
+        }
+
+		public DerObjectIdentifier ContentType
+        {
+            get { return (DerObjectIdentifier) data[0]; }
+        }
+
+		public AlgorithmIdentifier EncryptionAlgorithm
+        {
+			get { return AlgorithmIdentifier.GetInstance(data[1]); }
+        }
+
+		public Asn1OctetString Content
+        {
+			get
+			{
+				if (data.Count == 3)
+				{
+					DerTaggedObject o = (DerTaggedObject) data[2];
+
+					return Asn1OctetString.GetInstance(o.GetObject());
+				}
+
+				return null;
+			}
+        }
+
+		public override Asn1Object ToAsn1Object()
+        {
+			return new BerSequence(new DerInteger(0), data);
+        }
+    }
+}