104 lines
3.6 KiB
C
104 lines
3.6 KiB
C
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/*
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* An implementation of the CAST128 algorithm as mentioned in RFC2144
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* Copyright (c) 2014 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/cast5.h"
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#include "libavutil/log.h"
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int main(int argc, char** argv)
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{
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static const uint8_t Key[3][16] = {
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{0x01, 0x23, 0x45, 0x67, 0x12, 0x34, 0x56, 0x78, 0x23, 0x45, 0x67, 0x89, 0x34, 0x56, 0x78, 0x9a},
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{0x01, 0x23, 0x45, 0x67, 0x12, 0x34, 0x56, 0x78, 0x23, 0x45},
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{0x01, 0x23, 0x45, 0x67, 0x12}
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};
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static const uint8_t rpt[8] = {0x01, 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef};
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static const uint8_t rct[3][8] = {
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{0x23, 0x8b, 0x4f, 0xe5, 0x84, 0x7e, 0x44, 0xb2},
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{0xeb, 0x6a, 0x71, 0x1a, 0x2c, 0x02, 0x27, 0x1b},
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{0x7a, 0xc8, 0x16, 0xd1, 0x6e, 0x9b, 0x30, 0x2e}
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};
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static const uint8_t rct2[2][16] = {
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{0xee, 0xa9, 0xd0, 0xa2, 0x49, 0xfd, 0x3b, 0xa6, 0xb3, 0x43, 0x6f, 0xb8, 0x9d, 0x6d, 0xca, 0x92},
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{0xb2, 0xc9, 0x5e, 0xb0, 0x0c, 0x31, 0xad, 0x71, 0x80, 0xac, 0x05, 0xb8, 0xe8, 0x3d, 0x69, 0x6e}
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};
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static const uint8_t iv[8] = {0xee, 0xa9, 0xd0, 0xa2, 0x49, 0xfd, 0x3b, 0xa6};
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static uint8_t rpt2[2][16];
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int i, j, err = 0;
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static const int key_bits[3] = {128, 80, 40};
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uint8_t temp[8];
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struct AVCAST5 *cs;
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cs = av_cast5_alloc();
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if (!cs)
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return 1;
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for (j = 0; j < 3; j++){
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av_cast5_init(cs, Key[j], key_bits[j]);
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av_cast5_crypt(cs, temp, rpt, 1, 0);
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for (i = 0;i < 8; 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_cast5_crypt(cs, temp, rct[j], 1, 1);
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for (i =0; i < 8; 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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memcpy(rpt2[0], Key[0], 16);
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memcpy(rpt2[1], Key[0], 16);
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for (i = 0; i < 1000000; i++){
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av_cast5_init(cs, rpt2[1], 128);
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av_cast5_crypt(cs, rpt2[0], rpt2[0], 2, 0);
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av_cast5_init(cs, rpt2[0], 128);
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av_cast5_crypt(cs, rpt2[1], rpt2[1], 2, 0);
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}
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for (j = 0; j < 2; j++) {
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for (i = 0; i < 16; i++) {
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if (rct2[j][i] != rpt2[j][i]) {
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av_log(NULL, AV_LOG_ERROR, "%d %02x %02x\n", i, rct2[j][i], rpt2[j][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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av_cast5_init(cs, Key[j], key_bits[j]);
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memcpy(temp, iv, 8);
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av_cast5_crypt2(cs, rpt2[0], rct2[0], 2, temp, 0);
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memcpy(temp, iv, 8);
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av_cast5_crypt2(cs, rpt2[0], rpt2[0], 2, temp, 1);
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for (i = 0; i < 16; i++) {
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if (rct2[0][i] != rpt2[0][i]) {
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av_log(NULL, AV_LOG_ERROR, "%d %02x %02x\n", i, rct2[0][i], rpt2[0][i]);
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err = 1;
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}
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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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