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5ae5b2d3c7
_stdint.h is generated by Autotools and we don't really need it. All supported platforms now ship with stdint.h. The only stickler was MSVC, and since Visual Studio 2015 it also ships stdint.h now.
324 lines
11 KiB
C
324 lines
11 KiB
C
/* GStreamer
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* Copyright (C) <2005,2006> Wim Taymans <wim@fluendo.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library 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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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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/* Element-Checklist-Version: 5 */
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#ifdef HAVE_STDINT_H
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#include <stdint.h>
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#endif
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#include <string.h>
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#include <gst/gst.h>
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#include "realhash.h"
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void rtsp_ext_real_calc_response_and_checksum (char *response,
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char *chksum, char *challenge);
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/*
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* The following code has been copied from
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* xine-lib-1.1.1/src/input/libreal/real.c.
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*/
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static const unsigned char xor_table[] = {
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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, 0x00, 0x00, 0x00
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};
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#define LE_32(x) GST_READ_UINT32_LE(x)
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#define BE_32C(x,y) GST_WRITE_UINT32_BE(x,y)
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#define LE_32C(x,y) GST_WRITE_UINT32_LE(x,y)
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static void
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hash (char *field, char *param)
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{
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uint32_t a, b, c, d;
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/* fill variables */
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a = LE_32 (field);
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b = LE_32 (field + 4);
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c = LE_32 (field + 8);
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d = LE_32 (field + 12);
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a = ((b & c) | (~b & d)) + LE_32 ((param + 0x00)) + a - 0x28955B88;
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a = ((a << 0x07) | (a >> 0x19)) + b;
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d = ((a & b) | (~a & c)) + LE_32 ((param + 0x04)) + d - 0x173848AA;
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d = ((d << 0x0c) | (d >> 0x14)) + a;
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c = ((d & a) | (~d & b)) + LE_32 ((param + 0x08)) + c + 0x242070DB;
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c = ((c << 0x11) | (c >> 0x0f)) + d;
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b = ((c & d) | (~c & a)) + LE_32 ((param + 0x0c)) + b - 0x3E423112;
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b = ((b << 0x16) | (b >> 0x0a)) + c;
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a = ((b & c) | (~b & d)) + LE_32 ((param + 0x10)) + a - 0x0A83F051;
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a = ((a << 0x07) | (a >> 0x19)) + b;
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d = ((a & b) | (~a & c)) + LE_32 ((param + 0x14)) + d + 0x4787C62A;
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d = ((d << 0x0c) | (d >> 0x14)) + a;
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c = ((d & a) | (~d & b)) + LE_32 ((param + 0x18)) + c - 0x57CFB9ED;
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c = ((c << 0x11) | (c >> 0x0f)) + d;
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b = ((c & d) | (~c & a)) + LE_32 ((param + 0x1c)) + b - 0x02B96AFF;
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b = ((b << 0x16) | (b >> 0x0a)) + c;
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a = ((b & c) | (~b & d)) + LE_32 ((param + 0x20)) + a + 0x698098D8;
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a = ((a << 0x07) | (a >> 0x19)) + b;
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d = ((a & b) | (~a & c)) + LE_32 ((param + 0x24)) + d - 0x74BB0851;
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d = ((d << 0x0c) | (d >> 0x14)) + a;
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c = ((d & a) | (~d & b)) + LE_32 ((param + 0x28)) + c - 0x0000A44F;
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c = ((c << 0x11) | (c >> 0x0f)) + d;
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b = ((c & d) | (~c & a)) + LE_32 ((param + 0x2C)) + b - 0x76A32842;
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b = ((b << 0x16) | (b >> 0x0a)) + c;
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a = ((b & c) | (~b & d)) + LE_32 ((param + 0x30)) + a + 0x6B901122;
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a = ((a << 0x07) | (a >> 0x19)) + b;
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d = ((a & b) | (~a & c)) + LE_32 ((param + 0x34)) + d - 0x02678E6D;
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d = ((d << 0x0c) | (d >> 0x14)) + a;
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c = ((d & a) | (~d & b)) + LE_32 ((param + 0x38)) + c - 0x5986BC72;
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c = ((c << 0x11) | (c >> 0x0f)) + d;
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b = ((c & d) | (~c & a)) + LE_32 ((param + 0x3c)) + b + 0x49B40821;
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b = ((b << 0x16) | (b >> 0x0a)) + c;
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a = ((b & d) | (~d & c)) + LE_32 ((param + 0x04)) + a - 0x09E1DA9E;
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a = ((a << 0x05) | (a >> 0x1b)) + b;
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d = ((a & c) | (~c & b)) + LE_32 ((param + 0x18)) + d - 0x3FBF4CC0;
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d = ((d << 0x09) | (d >> 0x17)) + a;
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c = ((d & b) | (~b & a)) + LE_32 ((param + 0x2c)) + c + 0x265E5A51;
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c = ((c << 0x0e) | (c >> 0x12)) + d;
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b = ((c & a) | (~a & d)) + LE_32 ((param + 0x00)) + b - 0x16493856;
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b = ((b << 0x14) | (b >> 0x0c)) + c;
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a = ((b & d) | (~d & c)) + LE_32 ((param + 0x14)) + a - 0x29D0EFA3;
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a = ((a << 0x05) | (a >> 0x1b)) + b;
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d = ((a & c) | (~c & b)) + LE_32 ((param + 0x28)) + d + 0x02441453;
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d = ((d << 0x09) | (d >> 0x17)) + a;
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c = ((d & b) | (~b & a)) + LE_32 ((param + 0x3c)) + c - 0x275E197F;
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c = ((c << 0x0e) | (c >> 0x12)) + d;
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b = ((c & a) | (~a & d)) + LE_32 ((param + 0x10)) + b - 0x182C0438;
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b = ((b << 0x14) | (b >> 0x0c)) + c;
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a = ((b & d) | (~d & c)) + LE_32 ((param + 0x24)) + a + 0x21E1CDE6;
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a = ((a << 0x05) | (a >> 0x1b)) + b;
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d = ((a & c) | (~c & b)) + LE_32 ((param + 0x38)) + d - 0x3CC8F82A;
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d = ((d << 0x09) | (d >> 0x17)) + a;
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c = ((d & b) | (~b & a)) + LE_32 ((param + 0x0c)) + c - 0x0B2AF279;
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c = ((c << 0x0e) | (c >> 0x12)) + d;
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b = ((c & a) | (~a & d)) + LE_32 ((param + 0x20)) + b + 0x455A14ED;
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b = ((b << 0x14) | (b >> 0x0c)) + c;
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a = ((b & d) | (~d & c)) + LE_32 ((param + 0x34)) + a - 0x561C16FB;
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a = ((a << 0x05) | (a >> 0x1b)) + b;
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d = ((a & c) | (~c & b)) + LE_32 ((param + 0x08)) + d - 0x03105C08;
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d = ((d << 0x09) | (d >> 0x17)) + a;
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c = ((d & b) | (~b & a)) + LE_32 ((param + 0x1c)) + c + 0x676F02D9;
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c = ((c << 0x0e) | (c >> 0x12)) + d;
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b = ((c & a) | (~a & d)) + LE_32 ((param + 0x30)) + b - 0x72D5B376;
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b = ((b << 0x14) | (b >> 0x0c)) + c;
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a = (b ^ c ^ d) + LE_32 ((param + 0x14)) + a - 0x0005C6BE;
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a = ((a << 0x04) | (a >> 0x1c)) + b;
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d = (a ^ b ^ c) + LE_32 ((param + 0x20)) + d - 0x788E097F;
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d = ((d << 0x0b) | (d >> 0x15)) + a;
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c = (d ^ a ^ b) + LE_32 ((param + 0x2c)) + c + 0x6D9D6122;
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c = ((c << 0x10) | (c >> 0x10)) + d;
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b = (c ^ d ^ a) + LE_32 ((param + 0x38)) + b - 0x021AC7F4;
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b = ((b << 0x17) | (b >> 0x09)) + c;
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a = (b ^ c ^ d) + LE_32 ((param + 0x04)) + a - 0x5B4115BC;
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a = ((a << 0x04) | (a >> 0x1c)) + b;
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d = (a ^ b ^ c) + LE_32 ((param + 0x10)) + d + 0x4BDECFA9;
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d = ((d << 0x0b) | (d >> 0x15)) + a;
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c = (d ^ a ^ b) + LE_32 ((param + 0x1c)) + c - 0x0944B4A0;
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c = ((c << 0x10) | (c >> 0x10)) + d;
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b = (c ^ d ^ a) + LE_32 ((param + 0x28)) + b - 0x41404390;
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b = ((b << 0x17) | (b >> 0x09)) + c;
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a = (b ^ c ^ d) + LE_32 ((param + 0x34)) + a + 0x289B7EC6;
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a = ((a << 0x04) | (a >> 0x1c)) + b;
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d = (a ^ b ^ c) + LE_32 ((param + 0x00)) + d - 0x155ED806;
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d = ((d << 0x0b) | (d >> 0x15)) + a;
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c = (d ^ a ^ b) + LE_32 ((param + 0x0c)) + c - 0x2B10CF7B;
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c = ((c << 0x10) | (c >> 0x10)) + d;
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b = (c ^ d ^ a) + LE_32 ((param + 0x18)) + b + 0x04881D05;
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b = ((b << 0x17) | (b >> 0x09)) + c;
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a = (b ^ c ^ d) + LE_32 ((param + 0x24)) + a - 0x262B2FC7;
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a = ((a << 0x04) | (a >> 0x1c)) + b;
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d = (a ^ b ^ c) + LE_32 ((param + 0x30)) + d - 0x1924661B;
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d = ((d << 0x0b) | (d >> 0x15)) + a;
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c = (d ^ a ^ b) + LE_32 ((param + 0x3c)) + c + 0x1fa27cf8;
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c = ((c << 0x10) | (c >> 0x10)) + d;
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b = (c ^ d ^ a) + LE_32 ((param + 0x08)) + b - 0x3B53A99B;
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b = ((b << 0x17) | (b >> 0x09)) + c;
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a = ((~d | b) ^ c) + LE_32 ((param + 0x00)) + a - 0x0BD6DDBC;
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a = ((a << 0x06) | (a >> 0x1a)) + b;
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d = ((~c | a) ^ b) + LE_32 ((param + 0x1c)) + d + 0x432AFF97;
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d = ((d << 0x0a) | (d >> 0x16)) + a;
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c = ((~b | d) ^ a) + LE_32 ((param + 0x38)) + c - 0x546BDC59;
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c = ((c << 0x0f) | (c >> 0x11)) + d;
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b = ((~a | c) ^ d) + LE_32 ((param + 0x14)) + b - 0x036C5FC7;
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b = ((b << 0x15) | (b >> 0x0b)) + c;
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a = ((~d | b) ^ c) + LE_32 ((param + 0x30)) + a + 0x655B59C3;
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a = ((a << 0x06) | (a >> 0x1a)) + b;
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d = ((~c | a) ^ b) + LE_32 ((param + 0x0C)) + d - 0x70F3336E;
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d = ((d << 0x0a) | (d >> 0x16)) + a;
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c = ((~b | d) ^ a) + LE_32 ((param + 0x28)) + c - 0x00100B83;
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c = ((c << 0x0f) | (c >> 0x11)) + d;
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b = ((~a | c) ^ d) + LE_32 ((param + 0x04)) + b - 0x7A7BA22F;
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b = ((b << 0x15) | (b >> 0x0b)) + c;
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a = ((~d | b) ^ c) + LE_32 ((param + 0x20)) + a + 0x6FA87E4F;
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a = ((a << 0x06) | (a >> 0x1a)) + b;
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d = ((~c | a) ^ b) + LE_32 ((param + 0x3c)) + d - 0x01D31920;
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d = ((d << 0x0a) | (d >> 0x16)) + a;
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c = ((~b | d) ^ a) + LE_32 ((param + 0x18)) + c - 0x5CFEBCEC;
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c = ((c << 0x0f) | (c >> 0x11)) + d;
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b = ((~a | c) ^ d) + LE_32 ((param + 0x34)) + b + 0x4E0811A1;
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b = ((b << 0x15) | (b >> 0x0b)) + c;
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a = ((~d | b) ^ c) + LE_32 ((param + 0x10)) + a - 0x08AC817E;
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a = ((a << 0x06) | (a >> 0x1a)) + b;
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d = ((~c | a) ^ b) + LE_32 ((param + 0x2c)) + d - 0x42C50DCB;
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d = ((d << 0x0a) | (d >> 0x16)) + a;
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c = ((~b | d) ^ a) + LE_32 ((param + 0x08)) + c + 0x2AD7D2BB;
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c = ((c << 0x0f) | (c >> 0x11)) + d;
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b = ((~a | c) ^ d) + LE_32 ((param + 0x24)) + b - 0x14792C6F;
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b = ((b << 0x15) | (b >> 0x0b)) + c;
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a += LE_32 (field);
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b += LE_32 (field + 4);
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c += LE_32 (field + 8);
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d += LE_32 (field + 12);
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LE_32C (field, a);
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LE_32C (field + 4, b);
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LE_32C (field + 8, c);
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LE_32C (field + 12, d);
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}
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static void
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call_hash (char *key, char *challenge, int len)
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{
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uint8_t *ptr1, *ptr2;
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uint32_t a, b, c, d, tmp;
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ptr1 = (uint8_t *) (key + 16);
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ptr2 = (uint8_t *) (key + 20);
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a = LE_32 (ptr1);
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b = (a >> 3) & 0x3f;
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a += len * 8;
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LE_32C (ptr1, a);
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if (a < (len << 3))
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ptr2 += 4;
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tmp = LE_32 (ptr2) + (len >> 0x1d);
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LE_32C (ptr2, tmp);
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a = 64 - b;
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c = 0;
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if (a <= len) {
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memcpy (key + b + 24, challenge, a);
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hash (key, key + 24);
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c = a;
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d = c + 0x3f;
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while (d < len) {
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hash (key, challenge + d - 0x3f);
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d += 64;
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c += 64;
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}
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b = 0;
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}
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memcpy (key + b + 24, challenge + c, len - c);
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}
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void
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gst_rtsp_ext_real_calc_response_and_checksum (char *response, char *chksum,
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char *challenge)
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{
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int ch_len, table_len, resp_len;
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int i;
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char *ptr;
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char buf[128];
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char field[128];
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char zres[20];
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char buf1[128];
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char buf2[128];
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/* initialize return values */
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memset (response, 0, 64);
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memset (chksum, 0, 34);
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/* initialize buffer */
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memset (buf, 0, 128);
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ptr = buf;
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BE_32C (ptr, 0xa1e9149d);
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ptr += 4;
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BE_32C (ptr, 0x0e6b3b59);
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ptr += 4;
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if ((ch_len = MIN (strlen (challenge), 56)) == 40) {
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challenge[32] = 0;
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ch_len = 32;
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}
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memcpy (ptr, challenge, ch_len);
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/* xor challenge bytewise with xor_table */
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table_len = MIN (strlen ((char *) xor_table), 56);
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for (i = 0; i < table_len; i++)
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ptr[i] = ptr[i] ^ xor_table[i];
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/* initialize our field */
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BE_32C (field, 0x01234567);
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BE_32C (field + 4, 0x89ABCDEF);
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BE_32C (field + 8, 0xFEDCBA98);
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BE_32C (field + 12, 0x76543210);
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BE_32C (field + 16, 0x00000000);
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BE_32C (field + 20, 0x00000000);
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/* calculate response */
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call_hash (field, buf, 64);
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memset (buf1, 0, 64);
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*buf1 = 128;
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memcpy (buf2, field + 16, 8);
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i = (LE_32 ((buf2)) >> 3) & 0x3f;
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if (i < 56)
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i = 56 - i;
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else
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i = 120 - i;
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call_hash (field, buf1, i);
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call_hash (field, buf2, 8);
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memcpy (zres, field, 16);
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/* convert zres to ascii string */
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for (i = 0; i < 16; i++) {
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char a, b;
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a = (zres[i] >> 4) & 15;
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b = zres[i] & 15;
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response[i * 2] = ((a < 10) ? (a + 48) : (a + 87)) & 255;
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response[i * 2 + 1] = ((b < 10) ? (b + 48) : (b + 87)) & 255;
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}
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/* add tail */
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resp_len = strlen (response);
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strcpy (&response[resp_len], "01d0a8e3");
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/* calculate checksum */
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for (i = 0; i < resp_len / 4; i++)
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chksum[i] = response[i * 4];
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}
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