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/*
* ANSI X9.19 MAC
* (C) 1999-2007 Jack Lloyd
*
* Distributed under the terms of the Botan license
*/
#ifndef BOTAN_ANSI_X919_MAC_H__
#define BOTAN_ANSI_X919_MAC_H__
#include <botan/mac.h>
#include <botan/block_cipher.h>
namespace Botan {
/**
* DES/3DES-based MAC from ANSI X9.19
*/
class BOTAN_DLL ANSI_X919_MAC : public MessageAuthenticationCode
{
public:
void clear();
std::string name() const;
size_t output_length() const { return 8; }
MessageAuthenticationCode* clone() const;
Key_Length_Specification key_spec() const
{
return Key_Length_Specification(8, 16, 8);
}
/**
* @param cipher the underlying block cipher to use
*/
ANSI_X919_MAC(BlockCipher* cipher);
ANSI_X919_MAC(const ANSI_X919_MAC&) = delete;
ANSI_X919_MAC& operator=(const ANSI_X919_MAC&) = delete;
private:
void add_data(const byte[], size_t);
void final_result(byte[]);
void key_schedule(const byte[], size_t);
std::unique_ptr<BlockCipher> m_des1, m_des2;
secure_vector<byte> m_state;
size_t m_position;
};
}
#endif
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