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/* aes.hpp
*
* Copyright (C) 2003 Sawtooth Consulting Ltd.
*
* This file is part of yaSSL.
*
* yaSSL is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* yaSSL is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
/* aes.hpp defines AES
*/
#ifndef TAO_CRYPT_AES_HPP
#define TAO_CRYPT_AES_HPP
#include <string.h>
#include "misc.hpp"
#include "modes.hpp"
#include "block.hpp"
namespace TaoCrypt {
enum { AES_BLOCK_SIZE = 16 };
// AES encryption and decryption, see FIPS-197
class AES : public Mode_BASE {
public:
enum { BLOCK_SIZE = AES_BLOCK_SIZE };
AES(CipherDir DIR, Mode MODE)
: Mode_BASE(BLOCK_SIZE), dir_(DIR), mode_(MODE) {}
void Process(byte*, const byte*, word32);
void SetKey(const byte* iv, word32 sz, CipherDir fake = ENCRYPTION);
void ProcessAndXorBlock(const byte*, const byte*, byte*) const;
private:
CipherDir dir_;
Mode mode_;
static const word32 Te0[256];
static const word32 Te1[256];
static const word32 Te2[256];
static const word32 Te3[256];
static const word32 Te4[256];
static const word32 Td0[256];
static const word32 Td1[256];
static const word32 Td2[256];
static const word32 Td3[256];
static const word32 Td4[256];
static const word32 rcon_[];
word32 rounds_;
Word32Block key_;
void encrypt(const byte*, const byte*, byte*) const;
void decrypt(const byte*, const byte*, byte*) const;
AES(const AES&); // hide copy
AES& operator=(const AES&); // and assign
};
typedef BlockCipher<ENCRYPTION, AES, ECB> AES_ECB_Encryption;
typedef BlockCipher<DECRYPTION, AES, ECB> AES_ECB_Decryption;
typedef BlockCipher<ENCRYPTION, AES, CBC> AES_CBC_Encryption;
typedef BlockCipher<DECRYPTION, AES, CBC> AES_CBC_Decryption;
} // naemspace
#endif // TAO_CRYPT_AES_HPP
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