Initial Commit

iTechSharp/srcbc/asn1/ocsp/Signature.cs

@@ -0,0 +1,110 @@
+using System;
+
+using Org.BouncyCastle.Asn1;
+using Org.BouncyCastle.Asn1.X509;
+
+namespace Org.BouncyCastle.Asn1.Ocsp
+{
+    public class Signature
+        : Asn1Encodable
+    {
+        internal AlgorithmIdentifier	signatureAlgorithm;
+        internal DerBitString			signatureValue;
+        internal Asn1Sequence			certs;
+
+		public static Signature GetInstance(
+			Asn1TaggedObject	obj,
+			bool				explicitly)
+		{
+			return GetInstance(Asn1Sequence.GetInstance(obj, explicitly));
+		}
+
+		public static Signature GetInstance(
+			object  obj)
+		{
+			if (obj == null || obj is Signature)
+			{
+				return (Signature)obj;
+			}
+
+			if (obj is Asn1Sequence)
+			{
+				return new Signature((Asn1Sequence)obj);
+			}
+
+			throw new ArgumentException("unknown object in factory: " + obj.GetType().Name, "obj");
+		}
+
+		public Signature(
+            AlgorithmIdentifier signatureAlgorithm,
+            DerBitString        signatureValue)
+			: this(signatureAlgorithm, signatureValue, null)
+        {
+        }
+
+		public Signature(
+            AlgorithmIdentifier	signatureAlgorithm,
+            DerBitString		signatureValue,
+            Asn1Sequence		certs)
+        {
+			if (signatureAlgorithm == null)
+				throw new ArgumentException("signatureAlgorithm");
+			if (signatureValue == null)
+				throw new ArgumentException("signatureValue");
+
+			this.signatureAlgorithm = signatureAlgorithm;
+            this.signatureValue = signatureValue;
+            this.certs = certs;
+        }
+
+		private Signature(
+            Asn1Sequence seq)
+        {
+            signatureAlgorithm = AlgorithmIdentifier.GetInstance(seq[0]);
+            signatureValue = (DerBitString)seq[1];
+
+			if (seq.Count == 3)
+            {
+                certs = Asn1Sequence.GetInstance(
+					(Asn1TaggedObject)seq[2], true);
+            }
+        }
+
+		public AlgorithmIdentifier SignatureAlgorithm
+		{
+			get { return signatureAlgorithm; }
+		}
+
+		public DerBitString SignatureValue
+		{
+			get { return signatureValue; }
+		}
+
+		public Asn1Sequence Certs
+		{
+			get { return certs; }
+		}
+
+		/**
+         * Produce an object suitable for an Asn1OutputStream.
+         * <pre>
+         * Signature       ::=     Sequence {
+         *     signatureAlgorithm      AlgorithmIdentifier,
+         *     signature               BIT STRING,
+         *     certs               [0] EXPLICIT Sequence OF Certificate OPTIONAL}
+         * </pre>
+         */
+        public override Asn1Object ToAsn1Object()
+        {
+            Asn1EncodableVector v = new Asn1EncodableVector(
+				signatureAlgorithm, signatureValue);
+
+			if (certs != null)
+            {
+                v.Add(new DerTaggedObject(true, 0, certs));
+            }
+
+			return new DerSequence(v);
+        }
+    }
+}