1 files changed, 111 insertions, 0 deletions
diff --git a/crypto/src/asn1/DerVisibleString.cs b/crypto/src/asn1/DerVisibleString.cs
new file mode 100644
index 000000000..84c9caade
--- /dev/null
+++ b/crypto/src/asn1/DerVisibleString.cs
@@ -0,0 +1,111 @@
+using System;
+using System.Text;
+
+using Org.BouncyCastle.Utilities;
+
+namespace Org.BouncyCastle.Asn1
+{
+    /**
+     * Der VisibleString object.
+     */
+    public class DerVisibleString
+        : DerStringBase
+    {
+        private readonly string str;
+
+        /**
+         * return a Visible string from the passed in object.
+         *
+         * @exception ArgumentException if the object cannot be converted.
+         */
+        public static DerVisibleString GetInstance(
+            object obj)
+        {
+            if (obj == null || obj is DerVisibleString)
+            {
+                return (DerVisibleString)obj;
+            }
+
+            if (obj is Asn1OctetString)
+            {
+                return new DerVisibleString(((Asn1OctetString)obj).GetOctets());
+            }
+
+            if (obj is Asn1TaggedObject)
+            {
+                return GetInstance(((Asn1TaggedObject)obj).GetObject());
+            }
+
+            throw new ArgumentException("illegal object in GetInstance: " + obj.GetType().Name);
+        }
+
+        /**
+         * return a Visible 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 DerVisibleString GetInstance(
+            Asn1TaggedObject	obj,
+            bool				explicitly)
+        {
+            return GetInstance(obj.GetObject());
+        }
+
+        /**
+         * basic constructor - byte encoded string.
+         */
+        public DerVisibleString(
+            byte[] str)
+			: this(Strings.FromAsciiByteArray(str))
+        {
+        }
+
+		/**
+         * basic constructor
+         */
+        public DerVisibleString(
+            string str)
+        {
+			if (str == null)
+				throw new ArgumentNullException("str");
+
+			this.str = str;
+        }
+
+		public override string GetString()
+        {
+            return str;
+        }
+
+		public byte[] GetOctets()
+        {
+            return Strings.ToAsciiByteArray(str);
+        }
+
+		internal override void Encode(
+            DerOutputStream derOut)
+        {
+            derOut.WriteEncoded(Asn1Tags.VisibleString, GetOctets());
+        }
+
+		protected override bool Asn1Equals(
+			Asn1Object asn1Object)
+		{
+			DerVisibleString other = asn1Object as DerVisibleString;
+
+			if (other == null)
+				return false;
+
+			return this.str.Equals(other.str);
+        }
+
+		protected override int Asn1GetHashCode()
+		{
+            return this.str.GetHashCode();
+        }
+    }
+}