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/*************************************************
* Salsa20 Header File *
* (C) 1999-2008 Jack Lloyd *
*************************************************/
#ifndef BOTAN_SALSA20_H__
#define BOTAN_SALSA20_H__
#include <botan/base.h>
namespace Botan {
/*************************************************
* Salsa20 *
*************************************************/
class BOTAN_DLL Salsa20 : public StreamCipher
{
public:
void clear() throw();
std::string name() const;
StreamCipher* clone() const { return new Salsa20; }
void resync(const byte[], u32bit);
Salsa20();
~Salsa20() { clear(); }
private:
void cipher(const byte[], byte[], u32bit);
void key(const byte[], u32bit);
SecureBuffer<u32bit, 16> state;
SecureBuffer<byte, 64> buffer;
u32bit position;
};
}
#endif
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