1 files changed, 119 insertions, 0 deletions
diff --git a/Crypto/src/asn1/Asn1OctetString.cs b/Crypto/src/asn1/Asn1OctetString.cs
new file mode 100644
index 000000000..9c738a8f2
--- /dev/null
+++ b/Crypto/src/asn1/Asn1OctetString.cs
@@ -0,0 +1,119 @@
+using System;
+using System.Collections;
+using System.IO;
+
+using Org.BouncyCastle.Utilities;
+using Org.BouncyCastle.Utilities.Encoders;
+
+namespace Org.BouncyCastle.Asn1
+{
+    public abstract class Asn1OctetString
+        : Asn1Object, Asn1OctetStringParser
+    {
+        internal byte[] str;
+
+		/**
+         * return an Octet 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 Asn1OctetString GetInstance(
+			Asn1TaggedObject	obj,
+			bool				isExplicit)
+		{
+			Asn1Object o = obj.GetObject();
+
+			if (isExplicit || o is Asn1OctetString)
+			{
+				return GetInstance(o);
+			}
+
+			return BerOctetString.FromSequence(Asn1Sequence.GetInstance(o));
+		}
+
+        /**
+         * return an Octet string from the given object.
+         *
+         * @param obj the object we want converted.
+         * @exception ArgumentException if the object cannot be converted.
+         */
+		public static Asn1OctetString GetInstance(object obj)
+		{
+			if (obj == null || obj is Asn1OctetString)
+			{
+				return (Asn1OctetString)obj;
+			}
+
+			// TODO: this needs to be deleted in V2
+			if (obj is Asn1TaggedObject)
+				return GetInstance(((Asn1TaggedObject)obj).GetObject());
+
+			throw new ArgumentException("illegal object in GetInstance: " + obj.GetType().Name);
+		}
+
+        /**
+         * @param string the octets making up the octet string.
+         */
+        internal Asn1OctetString(
+            byte[] str)
+        {
+			if (str == null)
+				throw new ArgumentNullException("str");
+
+			this.str = str;
+        }
+
+        internal Asn1OctetString(
+            Asn1Encodable obj)
+        {
+            try
+            {
+				this.str = obj.GetEncoded(Asn1Encodable.Der);
+            }
+            catch (IOException e)
+            {
+                throw new ArgumentException("Error processing object : " + e.ToString());
+            }
+        }
+
+		public Stream GetOctetStream()
+		{
+			return new MemoryStream(str, false);
+		}
+
+		public Asn1OctetStringParser Parser
+		{
+			get { return this; }
+		}
+
+		public virtual byte[] GetOctets()
+        {
+            return str;
+        }
+
+		protected override int Asn1GetHashCode()
+		{
+			return Arrays.GetHashCode(GetOctets());
+        }
+
+		protected override bool Asn1Equals(
+			Asn1Object asn1Object)
+		{
+			DerOctetString other = asn1Object as DerOctetString;
+
+			if (other == null)
+				return false;
+
+			return Arrays.AreEqual(GetOctets(), other.GetOctets());
+		}
+
+		public override string ToString()
+		{
+			return "#" + Hex.ToHexString(str);
+		}
+	}
+}