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/*
* Blowfish
* (C) 1999-2011 Jack Lloyd
*
* Botan is released under the Simplified BSD License (see license.txt)
*/
#ifndef BOTAN_BLOWFISH_H_
#define BOTAN_BLOWFISH_H_
#include <botan/block_cipher.h>
namespace Botan {
/**
* Blowfish
*/
class BOTAN_PUBLIC_API(2,0) Blowfish final : public Block_Cipher_Fixed_Params<8, 1, 56>
{
public:
void encrypt_n(const uint8_t in[], uint8_t out[], size_t blocks) const override;
void decrypt_n(const uint8_t in[], uint8_t out[], size_t blocks) const override;
/**
* Modified EKSBlowfish key schedule, used for bcrypt password hashing
*/
void salted_set_key(const uint8_t key[], size_t key_length,
const uint8_t salt[], size_t salt_length,
const size_t workfactor, bool salt_first = false);
BOTAN_DEPRECATED("Use Blowfish::salted_set_key taking salt length")
void eks_key_schedule(const uint8_t key[], size_t key_length,
const uint8_t salt[16], size_t workfactor)
{
salted_set_key(key, key_length, salt, 16, workfactor);
}
void clear() override;
std::string name() const override { return "Blowfish"; }
BlockCipher* clone() const override { return new Blowfish; }
private:
void key_schedule(const uint8_t key[], size_t length) override;
void key_expansion(const uint8_t key[],
size_t key_length,
const uint8_t salt[],
size_t salt_length);
void generate_sbox(secure_vector<uint32_t>& box,
uint32_t& L, uint32_t& R,
const uint8_t salt[],
size_t salt_length,
size_t salt_off) const;
secure_vector<uint32_t> m_S, m_P;
};
}
#endif
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