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/*
* Serpent
* (C) 1999-2007 Jack Lloyd
*
* Distributed under the terms of the Botan license
*/
#ifndef BOTAN_SERPENT_H__
#define BOTAN_SERPENT_H__
#include <botan/block_cipher.h>
namespace Botan {
/**
* Serpent, an AES finalist
*/
class BOTAN_DLL Serpent : public BlockCipher_Fixed_Block_Size<16>
{
public:
void encrypt_n(const byte in[], byte out[], size_t blocks) const;
void decrypt_n(const byte in[], byte out[], size_t blocks) const;
void clear() { zeroise(round_key); }
std::string name() const { return "Serpent"; }
BlockCipher* clone() const { return new Serpent; }
Serpent() : BlockCipher_Fixed_Block_Size(16, 32, 8),
round_key(132) {}
protected:
/**
* For use by subclasses using SIMD, asm, etc
* @return const reference to the key schedule
*/
const SecureVector<u32bit>& get_round_keys() const
{ return round_key; }
/**
* For use by subclasses that implement the key schedule
* @param ks is the new key schedule value to set
*/
void set_round_keys(const u32bit ks[132])
{ round_key.set(ks, 132); }
private:
void key_schedule(const byte key[], size_t length);
SecureVector<u32bit> round_key;
};
}
#endif
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