Initial Commit

iTechSharp/srcbc/asn1/x509/IetfAttrSyntax.cs

@@ -0,0 +1,161 @@
+using System;
+using System.Collections;
+
+using Org.BouncyCastle.Asn1;
+
+namespace Org.BouncyCastle.Asn1.X509
+{
+    /**
+     * Implementation of <code>IetfAttrSyntax</code> as specified by RFC3281.
+     */
+    public class IetfAttrSyntax
+        : Asn1Encodable
+    {
+        public const int ValueOctets	= 1;
+        public const int ValueOid		= 2;
+        public const int ValueUtf8		= 3;
+
+		internal readonly GeneralNames	policyAuthority;
+        internal readonly Asn1EncodableVector values = new Asn1EncodableVector();
+
+		internal int valueChoice = -1;
+
+		/**
+         *
+         */
+        public IetfAttrSyntax(
+			Asn1Sequence seq)
+        {
+            int i = 0;
+
+            if (seq[0] is Asn1TaggedObject)
+            {
+                policyAuthority = GeneralNames.GetInstance(((Asn1TaggedObject)seq[0]), false);
+                i++;
+            }
+            else if (seq.Count == 2)
+            { // VOMS fix
+                policyAuthority = GeneralNames.GetInstance(seq[0]);
+                i++;
+            }
+
+			if (!(seq[i] is Asn1Sequence))
+            {
+                throw new ArgumentException("Non-IetfAttrSyntax encoding");
+            }
+
+			seq = (Asn1Sequence) seq[i];
+
+			foreach (Asn1Object obj in seq)
+			{
+                int type;
+
+                if (obj is DerObjectIdentifier)
+                {
+                    type = ValueOid;
+                }
+                else if (obj is DerUtf8String)
+                {
+                    type = ValueUtf8;
+                }
+                else if (obj is DerOctetString)
+                {
+                    type = ValueOctets;
+                }
+                else
+                {
+                    throw new ArgumentException("Bad value type encoding IetfAttrSyntax");
+                }
+
+				if (valueChoice < 0)
+                {
+                    valueChoice = type;
+                }
+
+				if (type != valueChoice)
+                {
+                    throw new ArgumentException("Mix of value types in IetfAttrSyntax");
+                }
+
+				values.Add(obj);
+            }
+        }
+
+		public GeneralNames PolicyAuthority
+		{
+			get { return policyAuthority; }
+		}
+
+		public int ValueType
+		{
+			get { return valueChoice; }
+		}
+
+		public object[] GetValues()
+        {
+            if (this.ValueType == ValueOctets)
+            {
+                Asn1OctetString[] tmp = new Asn1OctetString[values.Count];
+
+				for (int i = 0; i != tmp.Length; i++)
+                {
+                    tmp[i] = (Asn1OctetString) values[i];
+                }
+
+				return tmp;
+            }
+
+			if (this.ValueType == ValueOid)
+            {
+                DerObjectIdentifier[] tmp = new DerObjectIdentifier[values.Count];
+
+                for (int i = 0; i != tmp.Length; i++)
+                {
+                    tmp[i] = (DerObjectIdentifier) values[i];
+                }
+
+				return tmp;
+            }
+
+			{
+				DerUtf8String[] tmp = new DerUtf8String[values.Count];
+
+				for (int i = 0; i != tmp.Length; i++)
+				{
+					tmp[i] = (DerUtf8String) values[i];
+				}
+
+				return tmp;
+			}
+        }
+
+		/**
+         *
+         * <pre>
+         *
+         *  IetfAttrSyntax ::= Sequence {
+         *    policyAuthority [0] GeneralNames OPTIONAL,
+         *    values Sequence OF CHOICE {
+         *      octets OCTET STRING,
+         *      oid OBJECT IDENTIFIER,
+         *      string UTF8String
+         *    }
+         *  }
+         *
+         * </pre>
+         */
+        public override Asn1Object ToAsn1Object()
+        {
+            Asn1EncodableVector v = new Asn1EncodableVector();
+
+			if (policyAuthority != null)
+            {
+                v.Add(new DerTaggedObject(0, policyAuthority));
+            }
+
+			v.Add(new DerSequence(values));
+
+			return new DerSequence(v);
+        }
+    }
+}