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Member "n2n-3.1.1/include/tf.h" (31 Mar 2022, 2939 Bytes) of package /linux/misc/n2n-3.1.1.tar.gz:

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    1 /**
    2  * (C) 2007-22 - ntop.org and contributors
    3  *
    4  * This program is free software; you can redistribute it and/or modify
    5  * it under the terms of the GNU General Public License as published by
    6  * the Free Software Foundation; either version 3 of the License, or
    7  * (at your option) any later version.
    8  *
    9  * This program is distributed in the hope that it will be useful,
   10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
   11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   12  * GNU General Public License for more details.
   13  *
   14  * You should have received a copy of the GNU General Public License
   15  * along with this program; if not see see <http://www.gnu.org/licenses/>
   16  *
   17  */
   18 
   19 
   20 // taken (and modified) from github/fudanchii/twofish as of August 2020
   21 // which itself is a modified copy of Andrew T. Csillag's implementation
   22 // published on github/drewcsillag/twofish
   23 
   24 
   25 /**
   26  * The MIT License (MIT)
   27  *
   28  * Copyright (c) 2015 Andrew T. Csillag
   29  *
   30  * Permission is hereby granted, free of charge, to any person obtaining a copy
   31  * of this software and associated documentation files (the "Software"), to deal
   32  * in the Software without restriction, including without limitation the rights
   33  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   34  * copies of the Software, and to permit persons to whom the Software is
   35  * furnished to do so, subject to the following conditions:
   36  *
   37  * The above copyright notice and this permission notice shall be included in
   38  * all copies or substantial portions of the Software.
   39  *
   40  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   41  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   42  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
   43  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
   44  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
   45  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
   46  * THE SOFTWARE.
   47  */
   48 
   49 
   50 #ifndef TF_H
   51 #define TF_H
   52 
   53 
   54 #include <stdint.h>
   55 #include <stdlib.h>
   56 #include <string.h>
   57 
   58 #include "portable_endian.h"
   59 
   60 
   61 #define TF_BLOCK_SIZE     16
   62 #define TF_IV_SIZE       (TF_BLOCK_SIZE)
   63 
   64 
   65 typedef struct tf_context_t {
   66     int N;
   67     uint32_t K[40];
   68     uint32_t QF[4][256];
   69 } tf_context_t;
   70 
   71 
   72 int tf_ecb_decrypt (unsigned char *out, const unsigned char *in, tf_context_t *ctx);
   73 
   74 int tf_ecb_encrypt (unsigned char *out, const unsigned char *in, tf_context_t *ctx);
   75 
   76 int tf_cbc_encrypt (unsigned char *out, const unsigned char *in, size_t in_len,
   77                     const unsigned char *iv, tf_context_t *ctx);
   78 
   79 int tf_cbc_decrypt (unsigned char *out, const unsigned char *in, size_t in_len,
   80                     const unsigned char *iv, tf_context_t *ctx);
   81 
   82 int tf_init (const unsigned char *key, size_t key_size, tf_context_t **ctx);
   83 
   84 int tf_deinit (tf_context_t *ctx);
   85 
   86 
   87 #endif // TF_H