1 files changed, 161 insertions, 0 deletions
diff --git a/Crypto/src/asn1/x509/DistributionPoint.cs b/Crypto/src/asn1/x509/DistributionPoint.cs
new file mode 100644
index 000000000..ad1d3989e
--- /dev/null
+++ b/Crypto/src/asn1/x509/DistributionPoint.cs
@@ -0,0 +1,161 @@
+using System;
+using System.Text;
+
+using Org.BouncyCastle.Utilities;
+
+namespace Org.BouncyCastle.Asn1.X509
+{
+    /**
+     * The DistributionPoint object.
+     * <pre>
+     * DistributionPoint ::= Sequence {
+     *      distributionPoint [0] DistributionPointName OPTIONAL,
+     *      reasons           [1] ReasonFlags OPTIONAL,
+     *      cRLIssuer         [2] GeneralNames OPTIONAL
+     * }
+     * </pre>
+     */
+    public class DistributionPoint
+        : Asn1Encodable
+    {
+        internal readonly DistributionPointName	distributionPoint;
+        internal readonly ReasonFlags			reasons;
+        internal readonly GeneralNames			cRLIssuer;
+
+		public static DistributionPoint GetInstance(
+            Asn1TaggedObject	obj,
+            bool				explicitly)
+        {
+            return GetInstance(Asn1Sequence.GetInstance(obj, explicitly));
+        }
+
+		public static DistributionPoint GetInstance(
+            object obj)
+        {
+            if(obj == null || obj is DistributionPoint)
+            {
+                return (DistributionPoint) obj;
+            }
+
+			if(obj is Asn1Sequence)
+            {
+                return new DistributionPoint((Asn1Sequence) obj);
+            }
+
+			throw new ArgumentException("Invalid DistributionPoint: " + obj.GetType().Name);
+        }
+
+		private DistributionPoint(
+            Asn1Sequence seq)
+        {
+            for (int i = 0; i != seq.Count; i++)
+            {
+				Asn1TaggedObject t = Asn1TaggedObject.GetInstance(seq[i]);
+
+				switch (t.TagNo)
+                {
+                case 0:
+                    distributionPoint = DistributionPointName.GetInstance(t, true);
+                    break;
+                case 1:
+                    reasons = new ReasonFlags(DerBitString.GetInstance(t, false));
+                    break;
+                case 2:
+                    cRLIssuer = GeneralNames.GetInstance(t, false);
+                    break;
+                }
+            }
+        }
+
+		public DistributionPoint(
+            DistributionPointName	distributionPointName,
+            ReasonFlags				reasons,
+            GeneralNames			crlIssuer)
+        {
+            this.distributionPoint = distributionPointName;
+            this.reasons = reasons;
+            this.cRLIssuer = crlIssuer;
+        }
+
+		public DistributionPointName DistributionPointName
+        {
+			get { return distributionPoint; }
+        }
+
+		public ReasonFlags Reasons
+        {
+			get { return reasons; }
+        }
+
+		public GeneralNames CrlIssuer
+        {
+			get { return cRLIssuer; }
+        }
+
+		public override Asn1Object ToAsn1Object()
+        {
+            Asn1EncodableVector v = new Asn1EncodableVector();
+
+			if (distributionPoint != null)
+            {
+                //
+                // as this is a CHOICE it must be explicitly tagged
+                //
+                v.Add(new DerTaggedObject(0, distributionPoint));
+            }
+
+			if (reasons != null)
+            {
+                v.Add(new DerTaggedObject(false, 1, reasons));
+            }
+
+			if (cRLIssuer != null)
+            {
+                v.Add(new DerTaggedObject(false, 2, cRLIssuer));
+            }
+
+			return new DerSequence(v);
+        }
+
+		public override string ToString()
+		{
+			string sep = Platform.NewLine;
+			StringBuilder buf = new StringBuilder();
+			buf.Append("DistributionPoint: [");
+			buf.Append(sep);
+			if (distributionPoint != null)
+			{
+				appendObject(buf, sep, "distributionPoint", distributionPoint.ToString());
+			}
+			if (reasons != null)
+			{
+				appendObject(buf, sep, "reasons", reasons.ToString());
+			}
+			if (cRLIssuer != null)
+			{
+				appendObject(buf, sep, "cRLIssuer", cRLIssuer.ToString());
+			}
+			buf.Append("]");
+			buf.Append(sep);
+			return buf.ToString();
+		}
+
+		private void appendObject(
+			StringBuilder	buf,
+			string			sep,
+			string			name,
+			string			val)
+		{
+			string indent = "    ";
+
+			buf.Append(indent);
+			buf.Append(name);
+			buf.Append(":");
+			buf.Append(sep);
+			buf.Append(indent);
+			buf.Append(indent);
+			buf.Append(val);
+			buf.Append(sep);
+		}
+	}
+}