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/*
* Base64 Encoder/Decoder
* (C) 1999-2007 Jack Lloyd
*
* Distributed under the terms of the Botan license
*/
#ifndef BOTAN_BASE64_H__
#define BOTAN_BASE64_H__
#include <botan/filter.h>
namespace Botan {
/**
* This class represents a Base64 encoder.
*/
class BOTAN_DLL Base64_Encoder : public Filter
{
public:
static void encode(const byte in[3], byte out[4]);
/**
* Input a part of a message to the encoder.
* @param input the message to input as a byte array
* @param length the length of the byte array input
*/
void write(const byte input[], u32bit length);
/**
* Inform the Encoder that the current message shall be closed.
*/
void end_msg();
/**
* Create a base64 encoder.
* @param breaks whether to use line breaks in the Streamcipheroutput
* @param length the length of the lines of the output
* @param t_n whether to use a trailing newline
*/
Base64_Encoder(bool breaks = false, u32bit length = 72,
bool t_n = false);
private:
void encode_and_send(const byte[], u32bit);
void do_output(const byte[], u32bit);
static const byte BIN_TO_BASE64[64];
const u32bit line_length;
const bool trailing_newline;
SecureVector<byte> in, out;
u32bit position, counter;
};
/**
* This object represents a Base64 decoder.
*/
class BOTAN_DLL Base64_Decoder : public Filter
{
public:
static void decode(const byte input[4], byte output[3]);
static bool is_valid(byte);
/**
* Input a part of a message to the decoder.
* @param input the message to input as a byte array
* @param length the length of the byte array input
*/
void write(const byte input[], u32bit length);
/**
* Inform the Encoder that the current message shall be closed.
*/
void end_msg();
/**
* Create a base64 encoder.
* @param checking the type of checking that shall be performed by
* the decoder
*/
Base64_Decoder(Decoder_Checking checking = NONE);
private:
void decode_and_send(const byte[], u32bit);
void handle_bad_char(byte);
static const byte BASE64_TO_BIN[256];
const Decoder_Checking checking;
SecureVector<byte> in, out;
u32bit position;
};
}
#endif
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