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/*
* RC5
* (C) 1999-2007 Jack Lloyd
*
* Distributed under the terms of the Botan license
*/
#ifndef BOTAN_RC5_H__
#define BOTAN_RC5_H__
#include <botan/block_cipher.h>
namespace Botan {
/**
* RC5
*/
class BOTAN_DLL RC5 : public BlockCipher_Fixed_Block_Size<8>
{
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(S); }
std::string name() const;
BlockCipher* clone() const { return new RC5(get_rounds()); }
/**
* @param rounds the number of RC5 rounds to run. Must be between
* 8 and 32 and a multiple of 4.
*/
RC5(size_t rounds);
private:
size_t get_rounds() const { return (S.size() - 2) / 2; }
void key_schedule(const byte[], size_t);
SecureVector<u32bit> S;
};
}
#endif
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