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/*************************************************
* Hex Encoder/Decoder Header File *
* (C) 1999-2006 The Botan Project *
*************************************************/
#ifndef BOTAN_HEX_H__
#define BOTAN_HEX_H__
#include <botan/filter.h>
namespace Botan {
/*************************************************
* Hex Encoder *
*************************************************/
class Hex_Encoder : public Filter
{
public:
enum Case { Uppercase, Lowercase };
static void encode(byte, byte[2], Case = Uppercase);
void write(const byte[], u32bit);
void end_msg();
Hex_Encoder(Case);
Hex_Encoder(bool = false, u32bit = 72, Case = Uppercase);
private:
void encode_and_send(const byte[], u32bit);
static const byte BIN_TO_HEX_UPPER[16];
static const byte BIN_TO_HEX_LOWER[16];
const Case casing;
const u32bit line_length;
SecureVector<byte> in, out;
u32bit position, counter;
};
/*************************************************
* Hex Decoder *
*************************************************/
class Hex_Decoder : public Filter
{
public:
static byte decode(const byte[2]);
static bool is_valid(byte);
void write(const byte[], u32bit);
void end_msg();
Hex_Decoder(Decoder_Checking = NONE);
private:
void decode_and_send(const byte[], u32bit);
void handle_bad_char(byte);
static const byte HEX_TO_BIN[256];
const Decoder_Checking checking;
SecureVector<byte> in, out;
u32bit position;
};
}
#endif
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