diff --git a/Crypto/src/asn1/DerUniversalString.cs b/Crypto/src/asn1/DerUniversalString.cs
new file mode 100644
index 000000000..305102f2f
--- /dev/null
+++ b/Crypto/src/asn1/DerUniversalString.cs
@@ -0,0 +1,107 @@
+using System;
+using System.Text;
+
+using Org.BouncyCastle.Utilities;
+
+namespace Org.BouncyCastle.Asn1
+{
+ /**
+ * Der UniversalString object.
+ */
+ public class DerUniversalString
+ : DerStringBase
+ {
+ private static readonly char[] table = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' };
+
+ private readonly byte[] str;
+
+ /**
+ * return a Universal string from the passed in object.
+ *
+ * @exception ArgumentException if the object cannot be converted.
+ */
+ public static DerUniversalString GetInstance(
+ object obj)
+ {
+ if (obj == null || obj is DerUniversalString)
+ {
+ return (DerUniversalString)obj;
+ }
+
+ throw new ArgumentException("illegal object in GetInstance: " + obj.GetType().Name);
+ }
+
+ /**
+ * return a Universal 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 DerUniversalString GetInstance(
+ Asn1TaggedObject obj,
+ bool isExplicit)
+ {
+ Asn1Object o = obj.GetObject();
+
+ if (isExplicit || o is DerUniversalString)
+ {
+ return GetInstance(o);
+ }
+
+ return new DerUniversalString(Asn1OctetString.GetInstance(o).GetOctets());
+ }
+
+ /**
+ * basic constructor - byte encoded string.
+ */
+ public DerUniversalString(
+ byte[] str)
+ {
+ if (str == null)
+ throw new ArgumentNullException("str");
+
+ this.str = str;
+ }
+
+ public override string GetString()
+ {
+ StringBuilder buffer = new StringBuilder("#");
+ byte[] enc = GetDerEncoded();
+
+ for (int i = 0; i != enc.Length; i++)
+ {
+ uint ubyte = enc[i];
+ buffer.Append(table[(ubyte >> 4) & 0xf]);
+ buffer.Append(table[enc[i] & 0xf]);
+ }
+
+ return buffer.ToString();
+ }
+
+ public byte[] GetOctets()
+ {
+ return (byte[]) str.Clone();
+ }
+
+ internal override void Encode(
+ DerOutputStream derOut)
+ {
+ derOut.WriteEncoded(Asn1Tags.UniversalString, this.str);
+ }
+
+ protected override bool Asn1Equals(
+ Asn1Object asn1Object)
+ {
+ DerUniversalString other = asn1Object as DerUniversalString;
+
+ if (other == null)
+ return false;
+
+// return this.GetString().Equals(other.GetString());
+ return Arrays.AreEqual(this.str, other.str);
+ }
+ }
+}
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