128 lines
3.0 KiB
C#
128 lines
3.0 KiB
C#
using System;
|
|
using System.IO;
|
|
|
|
namespace Org.BouncyCastle.Utilities.Encoders
|
|
{
|
|
/**
|
|
* Convert binary data to and from UrlBase64 encoding. This is identical to
|
|
* Base64 encoding, except that the padding character is "." and the other
|
|
* non-alphanumeric characters are "-" and "_" instead of "+" and "/".
|
|
* <p>
|
|
* The purpose of UrlBase64 encoding is to provide a compact encoding of binary
|
|
* data that is safe for use as an URL parameter. Base64 encoding does not
|
|
* produce encoded values that are safe for use in URLs, since "/" can be
|
|
* interpreted as a path delimiter; "+" is the encoded form of a space; and
|
|
* "=" is used to separate a name from the corresponding value in an URL
|
|
* parameter.
|
|
* </p>
|
|
*/
|
|
public class UrlBase64
|
|
{
|
|
private static readonly IEncoder encoder = new UrlBase64Encoder();
|
|
|
|
/**
|
|
* Encode the input data producing a URL safe base 64 encoded byte array.
|
|
*
|
|
* @return a byte array containing the URL safe base 64 encoded data.
|
|
*/
|
|
public static byte[] Encode(
|
|
byte[] data)
|
|
{
|
|
MemoryStream bOut = new MemoryStream();
|
|
|
|
try
|
|
{
|
|
encoder.Encode(data, 0, data.Length, bOut);
|
|
}
|
|
catch (IOException e)
|
|
{
|
|
throw new Exception("exception encoding URL safe base64 string: " + e.Message, e);
|
|
}
|
|
|
|
return bOut.ToArray();
|
|
}
|
|
|
|
/**
|
|
* Encode the byte data writing it to the given output stream.
|
|
*
|
|
* @return the number of bytes produced.
|
|
*/
|
|
public static int Encode(
|
|
byte[] data,
|
|
Stream outStr)
|
|
{
|
|
return encoder.Encode(data, 0, data.Length, outStr);
|
|
}
|
|
|
|
/**
|
|
* Decode the URL safe base 64 encoded input data - white space will be ignored.
|
|
*
|
|
* @return a byte array representing the decoded data.
|
|
*/
|
|
public static byte[] Decode(
|
|
byte[] data)
|
|
{
|
|
MemoryStream bOut = new MemoryStream();
|
|
|
|
try
|
|
{
|
|
encoder.Decode(data, 0, data.Length, bOut);
|
|
}
|
|
catch (IOException e)
|
|
{
|
|
throw new Exception("exception decoding URL safe base64 string: " + e.Message, e);
|
|
}
|
|
|
|
return bOut.ToArray();
|
|
}
|
|
|
|
/**
|
|
* decode the URL safe base 64 encoded byte data writing it to the given output stream,
|
|
* whitespace characters will be ignored.
|
|
*
|
|
* @return the number of bytes produced.
|
|
*/
|
|
public static int Decode(
|
|
byte[] data,
|
|
Stream outStr)
|
|
{
|
|
return encoder.Decode(data, 0, data.Length, outStr);
|
|
}
|
|
|
|
/**
|
|
* decode the URL safe base 64 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();
|
|
|
|
try
|
|
{
|
|
encoder.DecodeString(data, bOut);
|
|
}
|
|
catch (IOException e)
|
|
{
|
|
throw new Exception("exception decoding URL safe base64 string: " + e.Message, e);
|
|
}
|
|
|
|
return bOut.ToArray();
|
|
}
|
|
|
|
/**
|
|
* Decode the URL safe 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 outStr)
|
|
{
|
|
return encoder.DecodeString(data, outStr);
|
|
}
|
|
}
|
|
}
|