1 files changed, 118 insertions, 0 deletions
diff --git a/crypto/src/asn1/x509/NameConstraints.cs b/crypto/src/asn1/x509/NameConstraints.cs
new file mode 100644
index 000000000..8374ff60a
--- /dev/null
+++ b/crypto/src/asn1/x509/NameConstraints.cs
@@ -0,0 +1,118 @@
+using System;
+using System.Collections;
+
+namespace Org.BouncyCastle.Asn1.X509
+{
+	public class NameConstraints
+		: Asn1Encodable
+	{
+		private Asn1Sequence permitted, excluded;
+
+		public static NameConstraints GetInstance(
+			object obj)
+		{
+			if (obj == null || obj is NameConstraints)
+			{
+				return (NameConstraints) obj;
+			}
+
+			if (obj is Asn1Sequence)
+			{
+				return new NameConstraints((Asn1Sequence) obj);
+			}
+
+			throw new ArgumentException("unknown object in factory: " + obj.GetType().Name, "obj");
+		}
+
+		public NameConstraints(
+			Asn1Sequence seq)
+		{
+			foreach (Asn1TaggedObject o in seq)
+			{
+				switch (o.TagNo)
+				{
+					case 0:
+						permitted = Asn1Sequence.GetInstance(o, false);
+						break;
+					case 1:
+						excluded = Asn1Sequence.GetInstance(o, false);
+						break;
+				}
+			}
+		}
+
+#if !SILVERLIGHT
+        public NameConstraints(
+            ArrayList permitted,
+            ArrayList excluded)
+            : this((IList)permitted, (IList)excluded)
+        {
+        }
+#endif
+
+        /**
+		 * Constructor from a given details.
+		 *
+		 * <p>permitted and excluded are Vectors of GeneralSubtree objects.</p>
+		 *
+		 * @param permitted Permitted subtrees
+		 * @param excluded Excluded subtrees
+		 */
+		public NameConstraints(
+			IList   permitted,
+			IList   excluded)
+		{
+			if (permitted != null)
+			{
+				this.permitted = CreateSequence(permitted);
+			}
+
+			if (excluded != null)
+			{
+				this.excluded = CreateSequence(excluded);
+			}
+		}
+
+		private DerSequence CreateSequence(
+			IList subtrees)
+		{
+            GeneralSubtree[] gsts = new GeneralSubtree[subtrees.Count];
+            for (int i = 0; i < subtrees.Count; ++i)
+            {
+                gsts[i] = (GeneralSubtree)subtrees[i];
+            }
+            return new DerSequence(gsts);
+		}
+
+		public Asn1Sequence PermittedSubtrees
+		{
+			get { return permitted; }
+		}
+
+		public Asn1Sequence ExcludedSubtrees
+		{
+			get { return excluded; }
+		}
+
+		/*
+		 * NameConstraints ::= SEQUENCE { permittedSubtrees [0] GeneralSubtrees
+		 * OPTIONAL, excludedSubtrees [1] GeneralSubtrees OPTIONAL }
+		 */
+		public override Asn1Object ToAsn1Object()
+		{
+			Asn1EncodableVector v = new Asn1EncodableVector();
+
+			if (permitted != null)
+			{
+				v.Add(new DerTaggedObject(false, 0, permitted));
+			}
+
+			if (excluded != null)
+			{
+				v.Add(new DerTaggedObject(false, 1, excluded));
+			}
+
+			return new DerSequence(v);
+		}
+	}
+}