1 files changed, 131 insertions, 0 deletions
diff --git a/crypto/src/util/encoders/Hex.cs b/crypto/src/util/encoders/Hex.cs
new file mode 100644
index 000000000..fbe475991
--- /dev/null
+++ b/crypto/src/util/encoders/Hex.cs
@@ -0,0 +1,131 @@
+using System;
+using System.IO;
+using System.Text;
+
+namespace Org.BouncyCastle.Utilities.Encoders
+{
+	/// <summary>
+	/// Class to decode and encode Hex.
+	/// </summary>
+	public sealed class Hex
+	{
+		private static readonly IEncoder encoder = new HexEncoder();
+
+		private Hex()
+		{
+		}
+
+		public static string ToHexString(
+			byte[] data)
+		{
+			byte[] hex = Encode(data, 0, data.Length);
+            return Strings.FromAsciiByteArray(hex);
+		}
+
+		public static string ToHexString(
+			byte[]	data,
+			int		off,
+			int		length)
+		{
+			byte[] hex = Encode(data, off, length);
+            return Strings.FromAsciiByteArray(hex);
+        }
+
+		/**
+		 * encode the input data producing a Hex encoded byte array.
+		 *
+		 * @return a byte array containing the Hex encoded data.
+		 */
+		public static byte[] Encode(
+			byte[] data)
+		{
+			return Encode(data, 0, data.Length);
+		}
+
+		/**
+		 * encode the input data producing a Hex encoded byte array.
+		 *
+		 * @return a byte array containing the Hex encoded data.
+		 */
+		public static byte[] Encode(
+			byte[]	data,
+			int		off,
+			int		length)
+		{
+			MemoryStream bOut = new MemoryStream(length * 2);
+
+			encoder.Encode(data, off, length, bOut);
+
+			return bOut.ToArray();
+		}
+
+		/**
+		 * Hex encode the byte data writing it to the given output stream.
+		 *
+		 * @return the number of bytes produced.
+		 */
+		public static int Encode(
+			byte[]	data,
+			Stream	outStream)
+		{
+			return encoder.Encode(data, 0, data.Length, outStream);
+		}
+
+		/**
+		 * Hex encode the byte data writing it to the given output stream.
+		 *
+		 * @return the number of bytes produced.
+		 */
+		public static int Encode(
+			byte[]	data,
+			int		off,
+			int		length,
+			Stream	outStream)
+		{
+			return encoder.Encode(data, off, length, outStream);
+		}
+
+		/**
+		 * decode the Hex encoded input data. It is assumed the input data is valid.
+		 *
+		 * @return a byte array representing the decoded data.
+		 */
+		public static byte[] Decode(
+			byte[] data)
+		{
+			MemoryStream bOut = new MemoryStream((data.Length + 1) / 2);
+
+			encoder.Decode(data, 0, data.Length, bOut);
+
+			return bOut.ToArray();
+		}
+
+		/**
+		 * decode the Hex encoded string data - whitespace will be ignored.
+		 *
+		 * @return a byte array representing the decoded data.
+		 */
+		public static byte[] Decode(
+			string data)
+		{
+			MemoryStream bOut = new MemoryStream((data.Length + 1) / 2);
+
+			encoder.DecodeString(data, bOut);
+
+			return bOut.ToArray();
+		}
+
+		/**
+		 * decode the Hex encoded string data writing it to the given output stream,
+		 * whitespace characters will be ignored.
+		 *
+		 * @return the number of bytes produced.
+		 */
+		public static int Decode(
+			string	data,
+			Stream	outStream)
+		{
+			return encoder.DecodeString(data, outStream);
+		}
+	}
+}