Initial Commit

iTechSharp/srcbc/asn1/smime/SMIMECapability.cs

@@ -0,0 +1,101 @@
+using System;
+
+using Org.BouncyCastle.Asn1;
+using Org.BouncyCastle.Asn1.Pkcs;
+
+namespace Org.BouncyCastle.Asn1.Smime
+{
+    public class SmimeCapability
+        : Asn1Encodable
+    {
+        /**
+         * general preferences
+         */
+        public static readonly DerObjectIdentifier PreferSignedData = PkcsObjectIdentifiers.PreferSignedData;
+        public static readonly DerObjectIdentifier CannotDecryptAny = PkcsObjectIdentifiers.CannotDecryptAny;
+        public static readonly DerObjectIdentifier SmimeCapabilitiesVersions = PkcsObjectIdentifiers.SmimeCapabilitiesVersions;
+
+		/**
+         * encryption algorithms preferences
+         */
+        public static readonly DerObjectIdentifier DesCbc = new DerObjectIdentifier("1.3.14.3.2.7");
+        public static readonly DerObjectIdentifier DesEde3Cbc = PkcsObjectIdentifiers.DesEde3Cbc;
+        public static readonly DerObjectIdentifier RC2Cbc = PkcsObjectIdentifiers.RC2Cbc;
+
+		private DerObjectIdentifier capabilityID;
+        private Asn1Object			parameters;
+
+		public SmimeCapability(
+            Asn1Sequence seq)
+        {
+            capabilityID = (DerObjectIdentifier) seq[0].ToAsn1Object();
+
+			if (seq.Count > 1)
+            {
+                parameters = seq[1].ToAsn1Object();
+            }
+        }
+
+		public SmimeCapability(
+            DerObjectIdentifier	capabilityID,
+            Asn1Encodable		parameters)
+        {
+			if (capabilityID == null)
+				throw new ArgumentNullException("capabilityID");
+
+			this.capabilityID = capabilityID;
+
+			if (parameters != null)
+			{
+				this.parameters = parameters.ToAsn1Object();
+			}
+        }
+
+		public static SmimeCapability GetInstance(
+            object obj)
+        {
+            if (obj == null || obj is SmimeCapability)
+            {
+                return (SmimeCapability) obj;
+            }
+
+			if (obj is Asn1Sequence)
+            {
+                return new SmimeCapability((Asn1Sequence) obj);
+            }
+
+			throw new ArgumentException("Invalid SmimeCapability");
+        }
+
+		public DerObjectIdentifier CapabilityID
+		{
+			get { return capabilityID; }
+		}
+
+		public Asn1Object Parameters
+		{
+			get { return parameters; }
+		}
+
+		/**
+         * Produce an object suitable for an Asn1OutputStream.
+         * <pre>
+         * SMIMECapability ::= Sequence {
+         *     capabilityID OBJECT IDENTIFIER,
+         *     parameters ANY DEFINED BY capabilityID OPTIONAL
+         * }
+         * </pre>
+         */
+        public override Asn1Object ToAsn1Object()
+        {
+            Asn1EncodableVector v = new Asn1EncodableVector(capabilityID);
+
+			if (parameters != null)
+            {
+                v.Add(parameters);
+            }
+
+			return new DerSequence(v);
+        }
+    }
+}