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/*
* An implementation of the CAST128 algorithm as mentioned in RFC2144
* Copyright (c) 2014 Supraja Meedinti
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <stddef.h>
#include <string.h>
#include "libavutil/cast5.h"
#include "libavutil/log.h"
#include "libavutil/mem.h"
int main(int argc, char** argv)
{
static const uint8_t Key[3][16] = {
{0x01, 0x23, 0x45, 0x67, 0x12, 0x34, 0x56, 0x78, 0x23, 0x45, 0x67, 0x89, 0x34, 0x56, 0x78, 0x9a},
{0x01, 0x23, 0x45, 0x67, 0x12, 0x34, 0x56, 0x78, 0x23, 0x45},
{0x01, 0x23, 0x45, 0x67, 0x12}
};
static const uint8_t rpt[8] = {0x01, 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef};
static const uint8_t rct[3][8] = {
{0x23, 0x8b, 0x4f, 0xe5, 0x84, 0x7e, 0x44, 0xb2},
{0xeb, 0x6a, 0x71, 0x1a, 0x2c, 0x02, 0x27, 0x1b},
{0x7a, 0xc8, 0x16, 0xd1, 0x6e, 0x9b, 0x30, 0x2e}
};
static const uint8_t rct2[2][16] = {
{0xee, 0xa9, 0xd0, 0xa2, 0x49, 0xfd, 0x3b, 0xa6, 0xb3, 0x43, 0x6f, 0xb8, 0x9d, 0x6d, 0xca, 0x92},
{0xb2, 0xc9, 0x5e, 0xb0, 0x0c, 0x31, 0xad, 0x71, 0x80, 0xac, 0x05, 0xb8, 0xe8, 0x3d, 0x69, 0x6e}
};
static const uint8_t iv[8] = {0xee, 0xa9, 0xd0, 0xa2, 0x49, 0xfd, 0x3b, 0xa6};
static uint8_t rpt2[2][16];
int i, j, err = 0;
static const int key_bits[3] = {128, 80, 40};
uint8_t temp[8];
struct AVCAST5 *cs;
cs = av_cast5_alloc();
if (!cs)
return 1;
for (j = 0; j < 3; j++){
av_cast5_init(cs, Key[j], key_bits[j]);
av_cast5_crypt(cs, temp, rpt, 1, 0);
for (i = 0;i < 8; i++){
if (rct[j][i] != temp[i]){
av_log(NULL, AV_LOG_ERROR, "%d %02x %02x\n", i, rct[j][i], temp[i]);
err = 1;
}
}
av_cast5_crypt(cs, temp, rct[j], 1, 1);
for (i =0; i < 8; i++) {
if (rpt[i] != temp[i]) {
av_log(NULL, AV_LOG_ERROR, "%d %02x %02x\n", i, rpt[i], temp[i]);
err = 1;
}
}
}
memcpy(rpt2[0], Key[0], 16);
memcpy(rpt2[1], Key[0], 16);
for (i = 0; i < 1000000; i++){
av_cast5_init(cs, rpt2[1], 128);
av_cast5_crypt(cs, rpt2[0], rpt2[0], 2, 0);
av_cast5_init(cs, rpt2[0], 128);
av_cast5_crypt(cs, rpt2[1], rpt2[1], 2, 0);
}
for (j = 0; j < 2; j++) {
for (i = 0; i < 16; i++) {
if (rct2[j][i] != rpt2[j][i]) {
av_log(NULL, AV_LOG_ERROR, "%d %02x %02x\n", i, rct2[j][i], rpt2[j][i]);
err = 1;
}
}
}
for (j = 0; j < 3; j++) {
av_cast5_init(cs, Key[j], key_bits[j]);
memcpy(temp, iv, 8);
av_cast5_crypt2(cs, rpt2[0], rct2[0], 2, temp, 0);
memcpy(temp, iv, 8);
av_cast5_crypt2(cs, rpt2[0], rpt2[0], 2, temp, 1);
for (i = 0; i < 16; i++) {
if (rct2[0][i] != rpt2[0][i]) {
av_log(NULL, AV_LOG_ERROR, "%d %02x %02x\n", i, rct2[0][i], rpt2[0][i]);
err = 1;
}
}
}
av_free(cs);
return err;
}
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