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/*************************************************
* S2K Header File *
* (C) 1999-2007 Jack Lloyd *
*************************************************/
#ifndef BOTAN_S2K_H__
#define BOTAN_S2K_H__
#include <botan/base.h>
namespace Botan {
/*************************************************
* S2K Interface *
*************************************************/
class BOTAN_DLL S2K
{
public:
virtual S2K* clone() const = 0;
virtual std::string name() const = 0;
virtual void clear() {}
OctetString derive_key(u32bit, const std::string&) const;
void set_iterations(u32bit);
void change_salt(const byte[], u32bit);
void change_salt(const MemoryRegion<byte>&);
void new_random_salt(RandomNumberGenerator& rng, u32bit);
u32bit iterations() const { return iter; }
SecureVector<byte> current_salt() const { return salt; }
S2K() { iter = 0; }
virtual ~S2K() {}
private:
virtual OctetString derive(u32bit, const std::string&,
const byte[], u32bit, u32bit) const = 0;
SecureVector<byte> salt;
u32bit iter;
};
}
#endif
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