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/**
* @file blowfish.h
* @brief Blowfish encryption algorithm
*
* @section License
*
* SPDX-License-Identifier: GPL-2.0-or-later
*
* Copyright (C) 2010-2026 Oryx Embedded SARL. All rights reserved.
*
* This file is part of CycloneCRYPTO Open.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* @author Oryx Embedded SARL (www.oryx-embedded.com)
* @version 2.6.2
**/
#ifndef _BLOWFISH_H
#define _BLOWFISH_H
//Dependencies
#include "core/crypto.h"
//Blowfish block size
#define BLOWFISH_BLOCK_SIZE 8
//Common interface for encryption algorithms
#define BLOWFISH_CIPHER_ALGO (&blowfishCipherAlgo)
//C++ guard
#ifdef __cplusplus
extern "C" {
#endif
/**
* @brief Blowfish algorithm context
**/
typedef struct
{
uint32_t p[18];
uint32_t s1[256];
uint32_t s2[256];
uint32_t s3[256];
uint32_t s4[256];
} BlowfishContext;
//Blowfish related constants
extern const CipherAlgo blowfishCipherAlgo;
//Blowfish related functions
error_t blowfishInit(BlowfishContext *context, const uint8_t *key,
size_t keyLen);
error_t blowfishInitState(BlowfishContext *context);
error_t blowfishExpandKey(BlowfishContext *context, const uint8_t *salt,
size_t saltLen, const uint8_t *key, size_t keyLen);
void blowfishEncryptBlock(BlowfishContext *context, const uint8_t *input,
uint8_t *output);
void blowfishDecryptBlock(BlowfishContext *context, const uint8_t *input,
uint8_t *output);
void blowfishXorBlock(uint8_t *data, const uint8_t *salt, size_t saltLen,
size_t *saltIndex);
void blowfishDeinit(BlowfishContext *context);
//C++ guard
#ifdef __cplusplus
}
#endif
#endif