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using System;
using System.IO;
using System.Text;
namespace Org.BouncyCastle.Utilities.Encoders
{
public sealed class Base64
{
private Base64()
{
}
public static string ToBase64String(
byte[] data)
{
return Convert.ToBase64String(data, 0, data.Length);
}
public static string ToBase64String(
byte[] data,
int off,
int length)
{
return Convert.ToBase64String(data, off, length);
}
/**
* encode the input data producing a base 64 encoded byte array.
*
* @return a byte array containing the base 64 encoded data.
*/
public static byte[] Encode(
byte[] data)
{
return Encode(data, 0, data.Length);
}
/**
* encode the input data producing a base 64 encoded byte array.
*
* @return a byte array containing the base 64 encoded data.
*/
public static byte[] Encode(
byte[] data,
int off,
int length)
{
string s = Convert.ToBase64String(data, off, length);
return Strings.ToAsciiByteArray(s);
}
/**
* Encode the byte data to base 64 writing it to the given output stream.
*
* @return the number of bytes produced.
*/
public static int Encode(
byte[] data,
Stream outStream)
{
byte[] encoded = Encode(data);
outStream.Write(encoded, 0, encoded.Length);
return encoded.Length;
}
/**
* Encode the byte data to base 64 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)
{
byte[] encoded = Encode(data, off, length);
outStream.Write(encoded, 0, encoded.Length);
return encoded.Length;
}
/**
* decode the base 64 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)
{
string s = Strings.FromAsciiByteArray(data);
return Convert.FromBase64String(s);
}
/**
* decode the base 64 encoded string data - whitespace will be ignored.
*
* @return a byte array representing the decoded data.
*/
public static byte[] Decode(
string data)
{
return Convert.FromBase64String(data);
}
/**
* decode the base 64 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)
{
byte[] decoded = Decode(data);
outStream.Write(decoded, 0, decoded.Length);
return decoded.Length;
}
}
}
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