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/*
* Blowfish
* (C) 1999-2011 Jack Lloyd
*
* Distributed under the terms of the Botan license
*/
#ifndef BOTAN_BLOWFISH_H__
#define BOTAN_BLOWFISH_H__
#include <botan/block_cipher.h>
namespace Botan {
/**
* Blowfish
*/
class BOTAN_DLL Blowfish : public Block_Cipher_Fixed_Params<8, 1, 56>
{
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;
/**
* Modified EKSBlowfish key schedule, used for bcrypt password hashing
*/
void eks_key_schedule(const byte key[], size_t key_length,
const byte salt[16], size_t workfactor);
void clear();
std::string name() const { return "Blowfish"; }
BlockCipher* clone() const { return new Blowfish; }
Blowfish() : S(1024), P(18) {}
private:
void key_schedule(const byte key[], size_t length);
void key_expansion(const byte key[],
size_t key_length,
const byte salt[16]);
void generate_sbox(secure_vector<u32bit>& box,
u32bit& L, u32bit& R,
const byte salt[16],
size_t salt_off) const;
static const u32bit P_INIT[18];
static const u32bit S_INIT[1024];
secure_vector<u32bit> S;
secure_vector<u32bit> P;
};
}
#endif
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