1 files changed, 137 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..2c6e54a77
--- /dev/null
+++ b/crypto/src/asn1/x509/V2Form.cs
@@ -0,0 +1,137 @@
+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 != null)
+                return new V2Form(Asn1Sequence.GetInstance(obj));
+            return null;
+        }
+
+        public V2Form(GeneralNames issuerName)
+            : this(issuerName, null, null)
+        {
+        }
+
+        public V2Form(GeneralNames issuerName, IssuerSerial baseCertificateID)
+            : this(issuerName, baseCertificateID, null)
+        {
+        }
+
+        public V2Form(GeneralNames issuerName, ObjectDigestInfo objectDigestInfo)
+            : this(issuerName, null, objectDigestInfo)
+        {
+        }
+
+        public V2Form(
+            GeneralNames issuerName,
+            IssuerSerial baseCertificateID,
+            ObjectDigestInfo objectDigestInfo)
+        {
+            this.issuerName = issuerName;
+            this.baseCertificateID = baseCertificateID;
+            this.objectDigestInfo = objectDigestInfo;
+        }
+
+        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);
+        }
+    }
+}