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85 lines
2.8 KiB
85 lines
2.8 KiB
/**
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* (C) 2007-20 - ntop.org and contributors
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not see see <http://www.gnu.org/licenses/>
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*
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*/
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// taken (and modified) from github/fudanchii/twofish as of August 2020
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// which itself is a modified copy of Andrew T. Csillag's implementation
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// published on github/drewcsillag/twofish
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/*
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The MIT License (MIT)
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Copyright (c) 2015 Andrew T. Csillag
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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*/
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#ifndef TF_H
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#define TF_H
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#include <stdint.h>
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#include <stdlib.h>
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#include <string.h>
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#include "portable_endian.h"
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#define TF_BLOCK_SIZE 16
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#define TF_IV_SIZE (TF_BLOCK_SIZE)
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typedef struct tf_context_t {
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int N;
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uint32_t K[40];
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uint32_t QF[4][256];
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} tf_context_t;
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int tf_ecb_decrypt (unsigned char *out, const unsigned char *in, tf_context_t *ctx);
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int tf_ecb_encrypt (unsigned char *out, const unsigned char *in, tf_context_t *ctx);
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int tf_cbc_encrypt (unsigned char *out, const unsigned char *in, size_t in_len,
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const unsigned char *iv, tf_context_t *ctx);
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int tf_cbc_decrypt (unsigned char *out, const unsigned char *in, size_t in_len,
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const unsigned char *iv, tf_context_t *ctx);
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int tf_init (const unsigned char *key, size_t key_size, tf_context_t **ctx);
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int tf_deinit (tf_context_t *ctx);
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#endif // TF_H
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