1 files changed, 125 insertions, 0 deletions
diff --git a/crypto/src/asn1/x509/V2Form.cs b/crypto/src/asn1/x509/V2Form.cs
new file mode 100644
index 000000000..a9c43357c
--- /dev/null
+++ b/crypto/src/asn1/x509/V2Form.cs
@@ -0,0 +1,125 @@
+using System;
+
+namespace Org.BouncyCastle.Asn1.X509
+{
+    public class V2Form
+        : Asn1Encodable
+    {
+        internal GeneralNames        issuerName;
+        internal IssuerSerial        baseCertificateID;
+        internal ObjectDigestInfo    objectDigestInfo;
+
+		public static V2Form GetInstance(
+            Asn1TaggedObject	obj,
+            bool				explicitly)
+        {
+            return GetInstance(Asn1Sequence.GetInstance(obj, explicitly));
+        }
+
+		public static V2Form GetInstance(
+            object obj)
+        {
+            if (obj is V2Form)
+            {
+                return (V2Form) obj;
+            }
+
+			if (obj is Asn1Sequence)
+            {
+                return new V2Form((Asn1Sequence) obj);
+            }
+
+			throw new ArgumentException("unknown object in factory: " + obj.GetType().Name, "obj");
+        }
+
+		public V2Form(
+            GeneralNames issuerName)
+        {
+            this.issuerName = issuerName;
+        }
+
+		private V2Form(
+            Asn1Sequence seq)
+        {
+			if (seq.Count > 3)
+			{
+				throw new ArgumentException("Bad sequence size: " + seq.Count);
+			}
+
+			int index = 0;
+
+			if (!(seq[0] is Asn1TaggedObject))
+            {
+                index++;
+                this.issuerName = GeneralNames.GetInstance(seq[0]);
+            }
+
+			for (int i = index; i != seq.Count; i++)
+            {
+				Asn1TaggedObject o = Asn1TaggedObject.GetInstance(seq[i]);
+				if (o.TagNo == 0)
+                {
+                    baseCertificateID = IssuerSerial.GetInstance(o, false);
+                }
+                else if (o.TagNo == 1)
+                {
+                    objectDigestInfo = ObjectDigestInfo.GetInstance(o, false);
+                }
+				else
+				{
+					throw new ArgumentException("Bad tag number: " + o.TagNo);
+				}
+			}
+        }
+
+		public GeneralNames IssuerName
+        {
+            get { return issuerName; }
+        }
+
+		public IssuerSerial BaseCertificateID
+        {
+            get { return baseCertificateID; }
+        }
+
+		public ObjectDigestInfo ObjectDigestInfo
+        {
+            get { return objectDigestInfo; }
+        }
+
+		/**
+         * Produce an object suitable for an Asn1OutputStream.
+         * <pre>
+         *  V2Form ::= Sequence {
+         *       issuerName            GeneralNames  OPTIONAL,
+         *       baseCertificateID     [0] IssuerSerial  OPTIONAL,
+         *       objectDigestInfo      [1] ObjectDigestInfo  OPTIONAL
+         *         -- issuerName MUST be present in this profile
+         *         -- baseCertificateID and objectDigestInfo MUST NOT
+         *         -- be present in this profile
+         *  }
+         * </pre>
+         */
+        public override Asn1Object ToAsn1Object()
+        {
+            Asn1EncodableVector v = new Asn1EncodableVector();
+
+			if (issuerName != null)
+            {
+                v.Add(issuerName);
+            }
+
+			if (baseCertificateID != null)
+            {
+                v.Add(new DerTaggedObject(false, 0, baseCertificateID));
+            }
+
+			if (objectDigestInfo != null)
+            {
+                v.Add(new DerTaggedObject(false, 1, objectDigestInfo));
+            }
+
+			return new DerSequence(v);
+        }
+    }
+}