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/*
* WiderWake
* (C) 1999-2008 Jack Lloyd
*
* Distributed under the terms of the Botan license
*/
#ifndef BOTAN_WIDER_WAKE_H__
#define BOTAN_WIDER_WAKE_H__
#include <botan/stream_cipher.h>
namespace Botan {
/**
* WiderWake4+1-BE
*
* Note: quite old and possibly not safe; use XSalsa20 or a block
* cipher in counter mode.
*/
class BOTAN_DLL WiderWake_41_BE : public StreamCipher
{
public:
void cipher(const byte[], byte[], size_t);
void set_iv(const byte[], size_t);
bool valid_iv_length(size_t iv_len) const
{ return (iv_len == 8); }
void clear();
std::string name() const { return "WiderWake4+1-BE"; }
StreamCipher* clone() const { return new WiderWake_41_BE; }
WiderWake_41_BE() : StreamCipher(16, 16, 1),
T(256), state(5), t_key(4),
buffer(DEFAULT_BUFFERSIZE), position(0)
{ }
private:
void key_schedule(const byte[], size_t);
void generate(size_t);
SecureVector<u32bit> T;
SecureVector<u32bit> state;
SecureVector<u32bit> t_key;
SecureVector<byte> buffer;
size_t position;
};
}
#endif
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