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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 encrypt_n(const byte in[], byte out[], u32bit blocks) const;
void decrypt_n(const byte in[], byte out[], u32bit blocks) const;
void clear();
std::string name() const { return "AES"; }
BlockCipher* clone() const { return new AES; }
AES() : BlockCipher(16, 16, 32, 8), EK(56), ME(16), DK(56), MD(16) { ROUNDS = 14; }
/**
* AES fixed to a particular key_size (16, 24, or 32 bytes)
* @param key_size the chosen fixed key size
*/
AES(u32bit key_size);
private:
void key_schedule(const byte[], u32bit);
static u32bit S(u32bit);
u32bit ROUNDS;
SecureVector<u32bit> EK;
SecureVector<byte> ME;
SecureVector<u32bit> DK;
SecureVector<byte> 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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