mirror of
https://gitee.com/openharmony/third_party_ffmpeg
synced 2024-11-30 22:50:48 +00:00
74 lines
2.3 KiB
C
74 lines
2.3 KiB
C
|
/*
|
||
|
|
* Realmedia RTSP protocol (RDT) support.
|
||
|
|
* Copyright (c) 2007 Ronald S. Bultje
|
||
|
|
*
|
||
|
|
* 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
|
||
|
|
*/
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @file rdt.c
|
||
|
|
* @brief Realmedia RTSP protocol (RDT) support
|
||
|
|
* @author Ronald S. Bultje <rbultje@ronald.bitfreak.net>
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "avformat.h"
|
||
|
|
#include "libavutil/avstring.h"
|
||
|
|
#include "rdt.h"
|
||
|
|
#include "libavutil/base64.h"
|
||
|
|
#include "libavutil/md5.h"
|
||
|
|
#include "rm.h"
|
||
|
|
#include "internal.h"
|
||
|
|
|
||
|
|
void
|
||
|
|
ff_rdt_calc_response_and_checksum(char response[41], char chksum[9],
|
||
|
|
const char *challenge)
|
||
|
|
{
|
||
|
|
int ch_len = strlen (challenge), i;
|
||
|
|
unsigned char zres[16],
|
||
|
|
buf[64] = { 0xa1, 0xe9, 0x14, 0x9d, 0x0e, 0x6b, 0x3b, 0x59 };
|
||
|
|
#define XOR_TABLE_SIZE 37
|
||
|
|
const unsigned char xor_table[XOR_TABLE_SIZE] = {
|
||
|
|
0x05, 0x18, 0x74, 0xd0, 0x0d, 0x09, 0x02, 0x53,
|
||
|
|
0xc0, 0x01, 0x05, 0x05, 0x67, 0x03, 0x19, 0x70,
|
||
|
|
0x08, 0x27, 0x66, 0x10, 0x10, 0x72, 0x08, 0x09,
|
||
|
|
0x63, 0x11, 0x03, 0x71, 0x08, 0x08, 0x70, 0x02,
|
||
|
|
0x10, 0x57, 0x05, 0x18, 0x54 };
|
||
|
|
|
||
|
|
/* some (length) checks */
|
||
|
|
if (ch_len == 40) /* what a hack... */
|
||
|
|
ch_len = 32;
|
||
|
|
else if (ch_len > 56)
|
||
|
|
ch_len = 56;
|
||
|
|
memcpy(buf + 8, challenge, ch_len);
|
||
|
|
|
||
|
|
/* xor challenge bytewise with xor_table */
|
||
|
|
for (i = 0; i < XOR_TABLE_SIZE; i++)
|
||
|
|
buf[8 + i] ^= xor_table[i];
|
||
|
|
|
||
|
|
av_md5_sum(zres, buf, 64);
|
||
|
|
ff_data_to_hex(response, zres, 16);
|
||
|
|
for (i=0;i<32;i++) response[i] = tolower(response[i]);
|
||
|
|
|
||
|
|
/* add tail */
|
||
|
|
strcpy (response + 32, "01d0a8e3");
|
||
|
|
|
||
|
|
/* calculate checksum */
|
||
|
|
for (i = 0; i < 8; i++)
|
||
|
|
chksum[i] = response[i * 4];
|
||
|
|
chksum[8] = 0;
|
||
|
|
}
|