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/**
* AES
* (C) 1999-2009 Jack Lloyd
*
* Distributed under the terms of the Botan license
*/
#ifndef BOTAN_AES_H__
#define BOTAN_AES_H__
#include <botan/block_cipher.h>
namespace Botan {
/**
* Rijndael aka AES
*/
class BOTAN_DLL AES : public BlockCipher
{
public:
void clear() throw();
std::string name() const { return "AES"; }
BlockCipher* clone() const { return new AES; }
AES() : BlockCipher(16, 16, 32, 8) { ROUNDS = 14; }
AES(u32bit);
private:
void encrypt_n(const byte in[], byte out[], u32bit blocks) const;
void decrypt_n(const byte in[], byte out[], u32bit blocks) const;
void key_schedule(const byte[], u32bit);
static u32bit S(u32bit);
static const byte SE[256];
static const byte SD[256];
static const u32bit TE[1024];
static const u32bit TD[1024];
u32bit ROUNDS;
SecureBuffer<u32bit, 56> EK;
SecureBuffer<byte, 16> ME;
SecureBuffer<u32bit, 56> DK;
SecureBuffer<byte, 16> MD;
};
/**
* AES-128
*/
class BOTAN_DLL AES_128 : public AES
{
public:
std::string name() const { return "AES-128"; }
BlockCipher* clone() const { return new AES_128; }
AES_128() : AES(16) {}
};
/**
* AES-192
*/
class BOTAN_DLL AES_192 : public AES
{
public:
std::string name() const { return "AES-192"; }
BlockCipher* clone() const { return new AES_192; }
AES_192() : AES(24) {}
};
/**
* AES-256
*/
class BOTAN_DLL AES_256 : public AES
{
public:
std::string name() const { return "AES-256"; }
BlockCipher* clone() const { return new AES_256; }
AES_256() : AES(32) {}
};
}
#endif
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