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/*
* Hex Encoding and Decoding
* (C) 2010 Jack Lloyd
*
* Distributed under the terms of the Botan license
*/
#ifndef BOTAN_HEX_CODEC_H__
#define BOTAN_HEX_CODEC_H__
#include <botan/secmem.h>
#include <string>
namespace Botan {
/**
* Perform hex encoding
* @param output an array of at least input_length*2 bytes
* @param input is some binary data
* @param input_length length of input in bytes
* @param uppercase should output be upper or lower case?
*/
void BOTAN_DLL hex_encode(char output[],
const byte input[],
size_t input_length,
bool uppercase = true);
/**
* Perform hex encoding
* @param input some input
* @param input_length length of input in bytes
* @param uppercase should output be upper or lower case?
* @return hexadecimal representation of input
*/
std::string BOTAN_DLL hex_encode(const byte input[],
size_t input_length,
bool uppercase = true);
/**
* Perform hex encoding
* @param input some input
* @param uppercase should output be upper or lower case?
* @return hexadecimal representation of input
*/
std::string BOTAN_DLL hex_encode(const MemoryRegion<byte>& input,
bool uppercase = true);
/**
* Perform hex decoding
* @param output an array of at least input_length/2 bytes
* @param input some hex input
* @param input_length length of input in bytes
* @param input_consumed is an output parameter which says how many
* bytes of input were actually consumed. If less than
* input_length, then the range input[consumed:length]
* should be passed in later along with more input.
* @param ignore_ws ignore whitespace on input; if false, throw an
exception if whitespace is encountered
* @return number of bytes written to output
*/
size_t BOTAN_DLL hex_decode(byte output[],
const char input[],
size_t input_length,
size_t& input_consumed,
bool ignore_ws = true);
/**
* Perform hex decoding
* @param output an array of at least input_length/2 bytes
* @param input some hex input
* @param input_length length of input in bytes
* @param ignore_ws ignore whitespace on input; if false, throw an
exception if whitespace is encountered
* @return number of bytes written to output
*/
size_t BOTAN_DLL hex_decode(byte output[],
const char input[],
size_t input_length,
bool ignore_ws = true);
/**
* Perform hex decoding
* @param output an array of at least input_length/2 bytes
* @param input some hex input
* @param ignore_ws ignore whitespace on input; if false, throw an
exception if whitespace is encountered
* @return number of bytes written to output
*/
size_t BOTAN_DLL hex_decode(byte output[],
const std::string& input,
bool ignore_ws = true);
/**
* Perform hex decoding
* @param input some hex input
* @param input_length the length of input in bytes
* @param ignore_ws ignore whitespace on input; if false, throw an
exception if whitespace is encountered
* @return decoded hex output
*/
SecureVector<byte> BOTAN_DLL hex_decode(const char input[],
size_t input_length,
bool ignore_ws = true);
/**
* Perform hex decoding
* @param input some hex input
* @param ignore_ws ignore whitespace on input; if false, throw an
exception if whitespace is encountered
* @return decoded hex output
*/
SecureVector<byte> BOTAN_DLL hex_decode(const std::string& input,
bool ignore_ws = true);
}
#endif
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