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 Encoding.ASCII.GetString(hex, 0, hex.Length);
}
public static string ToHexString(
byte[] data,
int off,
int length)
{
byte[] hex = Encode(data, off, length);
return Encoding.ASCII.GetString(hex, 0, hex.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)
{
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);
}
}
}
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