95 lines
3.6 KiB
C
95 lines
3.6 KiB
C
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/*
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* An implementation of the TwoFish algorithm
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* Copyright (c) 2015 Supraja Meedinti
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg 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 GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "libavutil/log.h"
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#include "libavutil/twofish.h"
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#include <stdio.h>
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#include <stdlib.h>
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int main(int argc, char *argv[])
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{
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uint8_t Key[32] = {0x01, 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef, 0xfe, 0xdc, 0xba, 0x98, 0x76, 0x54, 0x32, 0x10, 0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88, 0x99, 0xaa, 0xbb, 0xcc, 0xdd, 0xee, 0xff
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};
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const uint8_t rct[6][16] = {
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{0x9f, 0x58, 0x9f, 0x5c, 0xf6, 0x12, 0x2c, 0x32, 0xb6, 0xbf, 0xec, 0x2f, 0x2a, 0xe8, 0xc3, 0x5a},
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{0xcf, 0xd1, 0xd2, 0xe5, 0xa9, 0xbe, 0x9c, 0xdf, 0x50, 0x1f, 0x13, 0xb8, 0x92, 0xbd, 0x22, 0x48},
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{0x37, 0x52, 0x7b, 0xe0, 0x05, 0x23, 0x34, 0xb8, 0x9f, 0x0c, 0xfc, 0xca, 0xe8, 0x7c, 0xfa, 0x20},
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{0x5d, 0x9d, 0x4e, 0xef, 0xfa, 0x91, 0x51, 0x57, 0x55, 0x24, 0xf1, 0x15, 0x81, 0x5a, 0x12, 0xe0},
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{0xe7, 0x54, 0x49, 0x21, 0x2b, 0xee, 0xf9, 0xf4, 0xa3, 0x90, 0xbd, 0x86, 0x0a, 0x64, 0x09, 0x41},
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{0x37, 0xfe, 0x26, 0xff, 0x1c, 0xf6, 0x61, 0x75, 0xf5, 0xdd, 0xf4, 0xc3, 0x3b, 0x97, 0xa2, 0x05}
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};
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uint8_t temp[32], iv[16], rpt[32] = {0};
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const int kbits[3] = {128, 192, 256};
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int i, j, err = 0;
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struct AVTWOFISH *cs;
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cs = av_twofish_alloc();
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if (!cs)
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return 1;
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for (j = 1; j < 3; j++) {
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av_twofish_init(cs, Key, kbits[j]);
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av_twofish_crypt(cs, temp, rpt, 1, NULL, 0);
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for (i = 0; i < 16; i++) {
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if (rct[j][i] != temp[i]) {
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av_log(NULL, AV_LOG_ERROR, "%d %02x %02x\n", i, rct[j][i], temp[i]);
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err = 1;
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}
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}
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av_twofish_crypt(cs, temp, rct[j], 1, NULL, 1);
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for (i = 0; i < 16; i++) {
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if (rpt[i] != temp[i]) {
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av_log(NULL, AV_LOG_ERROR, "%d %02x %02x\n", i, rpt[i], temp[i]);
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err = 1;
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}
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}
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}
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for (j = 0; j < 3; j++) {
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memset(Key, 0, sizeof(Key));
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memset(rpt, 0, sizeof(rpt));
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for (i = 1; i < 50; i++) {
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av_twofish_init(cs, Key, kbits[j]);
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av_twofish_crypt(cs, temp, rpt, 1, NULL, 0);
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memcpy(Key+16,Key,(kbits[j]-128) >> 3);
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memcpy(Key,rpt,16);
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memcpy(rpt,temp,16);
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}
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for (i = 0; i < 16; i++) {
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if (rct[3 + j][i] != temp[i]) {
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av_log(NULL, AV_LOG_ERROR, "%d %02x %02x\n", i, rct[3 + j][i], temp[i]);
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err = 1;
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}
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}
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}
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memset(rpt, 0, sizeof(rpt));
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memcpy(iv, "HALLO123HALLO123", 16);
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av_twofish_crypt(cs, temp, rpt, 2, iv, 0);
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memcpy(iv, "HALLO123HALLO123", 16);
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av_twofish_crypt(cs, temp, temp, 2, iv, 1);
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for (i = 0; i < 32; i++) {
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if (rpt[i] != temp[i]) {
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av_log(NULL, AV_LOG_ERROR, "%d %02x %02x\n", i, rpt[i], temp[i]);
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err = 1;
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}
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}
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av_free(cs);
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return err;
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}
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