mirror of https://github.com/FFmpeg/FFmpeg.git
of the "RealChallenge2" response, which is some sort of authentication. See discussion in "Realmedia patch" thread on ffmpeg-devel. Originally committed as revision 15170 to svn://svn.ffmpeg.org/ffmpeg/trunkpull/126/head
Ronald S. Bultje
17 years ago
parent
bea6c1ec80
commit
e9dea59f16
4 changed files with 143 additions and 7 deletions
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/*
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* Realmedia RTSP protocol (RDT) support. |
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* Copyright (c) 2007 Ronald S. Bultje |
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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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/**
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* @file rdt.c |
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* @brief Realmedia RTSP protocol (RDT) support |
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* @author Ronald S. Bultje <rbultje@ronald.bitfreak.net> |
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*/ |
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#include "avformat.h" |
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#include "libavutil/avstring.h" |
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#include "rdt.h" |
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#include "libavutil/base64.h" |
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#include "libavutil/md5.h" |
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#include "rm.h" |
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#include "internal.h" |
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void |
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ff_rdt_calc_response_and_checksum(char response[41], char chksum[9], |
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const char *challenge) |
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{ |
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int ch_len = strlen (challenge), i; |
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unsigned char zres[16], |
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buf[64] = { 0xa1, 0xe9, 0x14, 0x9d, 0x0e, 0x6b, 0x3b, 0x59 }; |
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#define XOR_TABLE_SIZE 37 |
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const unsigned char xor_table[XOR_TABLE_SIZE] = { |
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0x05, 0x18, 0x74, 0xd0, 0x0d, 0x09, 0x02, 0x53, |
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0xc0, 0x01, 0x05, 0x05, 0x67, 0x03, 0x19, 0x70, |
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0x08, 0x27, 0x66, 0x10, 0x10, 0x72, 0x08, 0x09, |
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0x63, 0x11, 0x03, 0x71, 0x08, 0x08, 0x70, 0x02, |
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0x10, 0x57, 0x05, 0x18, 0x54 }; |
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/* some (length) checks */ |
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if (ch_len == 40) /* what a hack... */ |
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ch_len = 32; |
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else if (ch_len > 56) |
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ch_len = 56; |
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memcpy(buf + 8, challenge, ch_len); |
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/* xor challenge bytewise with xor_table */ |
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for (i = 0; i < XOR_TABLE_SIZE; i++) |
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buf[8 + i] ^= xor_table[i]; |
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av_md5_sum(zres, buf, 64); |
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ff_data_to_hex(response, zres, 16); |
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for (i=0;i<32;i++) response[i] = tolower(response[i]); |
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/* add tail */ |
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strcpy (response + 32, "01d0a8e3"); |
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/* calculate checksum */ |
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for (i = 0; i < 8; i++) |
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chksum[i] = response[i * 4]; |
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chksum[8] = 0; |
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} |
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@ -0,0 +1,40 @@ |
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/*
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* Realmedia RTSP (RDT) definitions |
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* Copyright (c) 2007 Ronald S. Bultje <rbultje@ronald.bitfreak.net> |
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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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#ifndef AVFORMAT_RDT_H |
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#define AVFORMAT_RDT_H |
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/**
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* Calculate the response (RealChallenge2 in the RTSP header) to the |
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* challenge (RealChallenge1 in the RTSP header from the Real/Helix |
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* server), which is used as some sort of client validation. |
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* |
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* @param response pointer to response buffer, it should be at least 41 bytes |
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* (40 data + 1 zero) bytes long. |
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* @param chksum pointer to buffer containing a checksum of the response, |
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* it should be at least 9 (8 data + 1 zero) bytes long. |
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* @param challenge pointer to the RealChallenge1 value provided by the |
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* server. |
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*/ |
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void ff_rdt_calc_response_and_checksum(char response[41], char chksum[9], |
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const char *challenge); |
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#endif /* AVFORMAT_RDT_H */ |
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