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/**
* (C) 2007-22 - ntop.org and contributors
*
* 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 3 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 see see <http://www.gnu.org/licenses/>
*
*/
// taken (and modified) from github/fudanchii/twofish as of August 2020
// which itself is a modified copy of Andrew T. Csillag's implementation
// published on github/drewcsillag/twofish
/**
* The MIT License (MIT)
*
* Copyright (c) 2015 Andrew T. Csillag
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#ifndef TF_H
#define TF_H
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include "portable_endian.h"
#define TF_BLOCK_SIZE 16
#define TF_IV_SIZE (TF_BLOCK_SIZE)
typedef struct tf_context_t {
int N;
uint32_t K[40];
uint32_t QF[4][256];
} tf_context_t;
int tf_ecb_decrypt (unsigned char *out, const unsigned char *in, tf_context_t *ctx);
int tf_ecb_encrypt (unsigned char *out, const unsigned char *in, tf_context_t *ctx);
int tf_cbc_encrypt (unsigned char *out, const unsigned char *in, size_t in_len,
const unsigned char *iv, tf_context_t *ctx);
int tf_cbc_decrypt (unsigned char *out, const unsigned char *in, size_t in_len,
const unsigned char *iv, tf_context_t *ctx);
int tf_init (const unsigned char *key, size_t key_size, tf_context_t **ctx);
int tf_deinit (tf_context_t *ctx);
#endif // TF_H
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