1 files changed, 96 insertions, 0 deletions
diff --git a/Crypto/src/asn1/DerUTF8String.cs b/Crypto/src/asn1/DerUTF8String.cs
new file mode 100644
index 000000000..92a50e824
--- /dev/null
+++ b/Crypto/src/asn1/DerUTF8String.cs
@@ -0,0 +1,96 @@
+using System;
+using System.Text;
+
+namespace Org.BouncyCastle.Asn1
+{
+    /**
+     * Der UTF8String object.
+     */
+    public class DerUtf8String
+        : DerStringBase
+    {
+        private readonly string str;
+
+		/**
+         * return an UTF8 string from the passed in object.
+         *
+         * @exception ArgumentException if the object cannot be converted.
+         */
+        public static DerUtf8String GetInstance(
+            object obj)
+        {
+            if (obj == null || obj is DerUtf8String)
+            {
+                return (DerUtf8String)obj;
+            }
+
+			throw new ArgumentException("illegal object in GetInstance: " + obj.GetType().Name);
+        }
+
+        /**
+         * return an UTF8 string from a tagged object.
+         *
+         * @param obj the tagged object holding the object we want
+         * @param explicitly true if the object is meant to be explicitly
+         *              tagged false otherwise.
+         * @exception ArgumentException if the tagged object cannot
+         *               be converted.
+         */
+        public static DerUtf8String GetInstance(
+            Asn1TaggedObject	obj,
+            bool				isExplicit)
+        {
+			Asn1Object o = obj.GetObject();
+
+			if (isExplicit || o is DerUtf8String)
+			{
+				return GetInstance(o);
+			}
+
+			return new DerUtf8String(Asn1OctetString.GetInstance(o).GetOctets());
+        }
+
+        /**
+         * basic constructor - byte encoded string.
+         */
+        public DerUtf8String(
+            byte[] str)
+			: this(Encoding.UTF8.GetString(str, 0, str.Length))
+        {
+        }
+
+		/**
+         * basic constructor
+         */
+        public DerUtf8String(
+            string str)
+        {
+			if (str == null)
+				throw new ArgumentNullException("str");
+
+			this.str = str;
+        }
+
+		public override string GetString()
+        {
+            return str;
+        }
+
+		protected override bool Asn1Equals(
+			Asn1Object asn1Object)
+		{
+			DerUtf8String other = asn1Object as DerUtf8String;
+
+			if (other == null)
+				return false;
+
+			return this.str.Equals(other.str);
+        }
+
+		internal override void Encode(
+			DerOutputStream derOut)
+        {
+            derOut.WriteEncoded(Asn1Tags.Utf8String, Encoding.UTF8.GetBytes(str));
+        }
+    }
+}