real.c

自己移植的linux下的流媒体播放器原代码,支持mms协议,支持ftp和http协议.

/*
 * This file was ported to MPlayer from xine CVS real.c,v 1.8 2003/03/30 17:11:50
 */

/*
 * Copyright (C) 2002 the xine project
 *
 * This file is part of xine, a free video player.
 *
 * xine is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * xine 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA
 *
 *
 * special functions for real streams.
 * adopted from joschkas real tools.
 *
 */

#include <stdio.h>
#include <string.h>

#include "../config.h"
#include "../bswap.h"
#include "real.h"
#include "asmrp.h"
#include "sdpplin.h"
#include "xbuffer.h"

/*
#define LOG
*/

const unsigned char xor_table[] = {
    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, 0x00, 0x00, 0x00 };


#define BE_32C(x,y) (*((uint32_t*)(x))=be2me_32(y))

#define BE_16(x)  be2me_16(*(uint16_t*)(x))

#define BE_32(x)  be2me_32(*(uint32_t*)(x))

#ifndef MAX
#define MAX(x,y) ((x>y) ? x : y)
#endif

#ifdef LOG
static void hexdump (const char *buf, int length) {

  int i;

  printf (" hexdump> ");
  for (i = 0; i < length; i++) {
    unsigned char c = buf[i];

    printf ("%02x", c);

    if ((i % 16) == 15)
      printf ("\n         ");

    if ((i % 2) == 1)
      printf (" ");

  }
  printf ("\n");
}
#endif


static void hash(char *field, char *param) {

  uint32_t a, b, c, d;
 

  /* fill variables */
  a= le2me_32(*(uint32_t*)(field));
  b= le2me_32(*(uint32_t*)(field+4));
  c= le2me_32(*(uint32_t*)(field+8));
  d= le2me_32(*(uint32_t*)(field+12));

#ifdef LOG
  printf("real: hash input: %x %x %x %x\n", a, b, c, d);
  printf("real: hash parameter:\n");
  hexdump(param, 64);
  printf("real: hash field:\n");
  hexdump(field, 64+24);
#endif
  
  a = ((b & c) | (~b & d)) + le2me_32(*((uint32_t*)(param+0x00))) + a - 0x28955B88;
  a = ((a << 0x07) | (a >> 0x19)) + b;
  d = ((a & b) | (~a & c)) + le2me_32(*((uint32_t*)(param+0x04))) + d - 0x173848AA;
  d = ((d << 0x0c) | (d >> 0x14)) + a;
  c = ((d & a) | (~d & b)) + le2me_32(*((uint32_t*)(param+0x08))) + c + 0x242070DB;
  c = ((c << 0x11) | (c >> 0x0f)) + d;
  b = ((c & d) | (~c & a)) + le2me_32(*((uint32_t*)(param+0x0c))) + b - 0x3E423112;
  b = ((b << 0x16) | (b >> 0x0a)) + c;
  a = ((b & c) | (~b & d)) + le2me_32(*((uint32_t*)(param+0x10))) + a - 0x0A83F051;
  a = ((a << 0x07) | (a >> 0x19)) + b;
  d = ((a & b) | (~a & c)) + le2me_32(*((uint32_t*)(param+0x14))) + d + 0x4787C62A;
  d = ((d << 0x0c) | (d >> 0x14)) + a;
  c = ((d & a) | (~d & b)) + le2me_32(*((uint32_t*)(param+0x18))) + c - 0x57CFB9ED;
  c = ((c << 0x11) | (c >> 0x0f)) + d;
  b = ((c & d) | (~c & a)) + le2me_32(*((uint32_t*)(param+0x1c))) + b - 0x02B96AFF;
  b = ((b << 0x16) | (b >> 0x0a)) + c;
  a = ((b & c) | (~b & d)) + le2me_32(*((uint32_t*)(param+0x20))) + a + 0x698098D8;
  a = ((a << 0x07) | (a >> 0x19)) + b;
  d = ((a & b) | (~a & c)) + le2me_32(*((uint32_t*)(param+0x24))) + d - 0x74BB0851;
  d = ((d << 0x0c) | (d >> 0x14)) + a;
  c = ((d & a) | (~d & b)) + le2me_32(*((uint32_t*)(param+0x28))) + c - 0x0000A44F;
  c = ((c << 0x11) | (c >> 0x0f)) + d;
  b = ((c & d) | (~c & a)) + le2me_32(*((uint32_t*)(param+0x2C))) + b - 0x76A32842;
  b = ((b << 0x16) | (b >> 0x0a)) + c;
  a = ((b & c) | (~b & d)) + le2me_32(*((uint32_t*)(param+0x30))) + a + 0x6B901122;
  a = ((a << 0x07) | (a >> 0x19)) + b;
  d = ((a & b) | (~a & c)) + le2me_32(*((uint32_t*)(param+0x34))) + d - 0x02678E6D;
  d = ((d << 0x0c) | (d >> 0x14)) + a;
  c = ((d & a) | (~d & b)) + le2me_32(*((uint32_t*)(param+0x38))) + c - 0x5986BC72;
  c = ((c << 0x11) | (c >> 0x0f)) + d;
  b = ((c & d) | (~c & a)) + le2me_32(*((uint32_t*)(param+0x3c))) + b + 0x49B40821;
  b = ((b << 0x16) | (b >> 0x0a)) + c;
  
  a = ((b & d) | (~d & c)) + le2me_32(*((uint32_t*)(param+0x04))) + a - 0x09E1DA9E;
  a = ((a << 0x05) | (a >> 0x1b)) + b;
  d = ((a & c) | (~c & b)) + le2me_32(*((uint32_t*)(param+0x18))) + d - 0x3FBF4CC0;
  d = ((d << 0x09) | (d >> 0x17)) + a;
  c = ((d & b) | (~b & a)) + le2me_32(*((uint32_t*)(param+0x2c))) + c + 0x265E5A51;
  c = ((c << 0x0e) | (c >> 0x12)) + d;
  b = ((c & a) | (~a & d)) + le2me_32(*((uint32_t*)(param+0x00))) + b - 0x16493856;
  b = ((b << 0x14) | (b >> 0x0c)) + c;
  a = ((b & d) | (~d & c)) + le2me_32(*((uint32_t*)(param+0x14))) + a - 0x29D0EFA3;
  a = ((a << 0x05) | (a >> 0x1b)) + b;
  d = ((a & c) | (~c & b)) + le2me_32(*((uint32_t*)(param+0x28))) + d + 0x02441453;
  d = ((d << 0x09) | (d >> 0x17)) + a;
  c = ((d & b) | (~b & a)) + le2me_32(*((uint32_t*)(param+0x3c))) + c - 0x275E197F;
  c = ((c << 0x0e) | (c >> 0x12)) + d;
  b = ((c & a) | (~a & d)) + le2me_32(*((uint32_t*)(param+0x10))) + b - 0x182C0438;
  b = ((b << 0x14) | (b >> 0x0c)) + c;
  a = ((b & d) | (~d & c)) + le2me_32(*((uint32_t*)(param+0x24))) + a + 0x21E1CDE6;
  a = ((a << 0x05) | (a >> 0x1b)) + b;
  d = ((a & c) | (~c & b)) + le2me_32(*((uint32_t*)(param+0x38))) + d - 0x3CC8F82A;
  d = ((d << 0x09) | (d >> 0x17)) + a;
  c = ((d & b) | (~b & a)) + le2me_32(*((uint32_t*)(param+0x0c))) + c - 0x0B2AF279;
  c = ((c << 0x0e) | (c >> 0x12)) + d;
  b = ((c & a) | (~a & d)) + le2me_32(*((uint32_t*)(param+0x20))) + b + 0x455A14ED;
  b = ((b << 0x14) | (b >> 0x0c)) + c;
  a = ((b & d) | (~d & c)) + le2me_32(*((uint32_t*)(param+0x34))) + a - 0x561C16FB;
  a = ((a << 0x05) | (a >> 0x1b)) + b;
  d = ((a & c) | (~c & b)) + le2me_32(*((uint32_t*)(param+0x08))) + d - 0x03105C08;
  d = ((d << 0x09) | (d >> 0x17)) + a;
  c = ((d & b) | (~b & a)) + le2me_32(*((uint32_t*)(param+0x1c))) + c + 0x676F02D9;
  c = ((c << 0x0e) | (c >> 0x12)) + d;
  b = ((c & a) | (~a & d)) + le2me_32(*((uint32_t*)(param+0x30))) + b - 0x72D5B376;
  b = ((b << 0x14) | (b >> 0x0c)) + c;
  
  a = (b ^ c ^ d) + le2me_32(*((uint32_t*)(param+0x14))) + a - 0x0005C6BE;
  a = ((a << 0x04) | (a >> 0x1c)) + b;
  d = (a ^ b ^ c) + le2me_32(*((uint32_t*)(param+0x20))) + d - 0x788E097F;
  d = ((d << 0x0b) | (d >> 0x15)) + a;
  c = (d ^ a ^ b) + le2me_32(*((uint32_t*)(param+0x2c))) + c + 0x6D9D6122;
  c = ((c << 0x10) | (c >> 0x10)) + d;
  b = (c ^ d ^ a) + le2me_32(*((uint32_t*)(param+0x38))) + b - 0x021AC7F4;
  b = ((b << 0x17) | (b >> 0x09)) + c;
  a = (b ^ c ^ d) + le2me_32(*((uint32_t*)(param+0x04))) + a - 0x5B4115BC;
  a = ((a << 0x04) | (a >> 0x1c)) + b;
  d = (a ^ b ^ c) + le2me_32(*((uint32_t*)(param+0x10))) + d + 0x4BDECFA9;
  d = ((d << 0x0b) | (d >> 0x15)) + a;
  c = (d ^ a ^ b) + le2me_32(*((uint32_t*)(param+0x1c))) + c - 0x0944B4A0;
  c = ((c << 0x10) | (c >> 0x10)) + d;
  b = (c ^ d ^ a) + le2me_32(*((uint32_t*)(param+0x28))) + b - 0x41404390;
  b = ((b << 0x17) | (b >> 0x09)) + c;
  a = (b ^ c ^ d) + le2me_32(*((uint32_t*)(param+0x34))) + a + 0x289B7EC6;
  a = ((a << 0x04) | (a >> 0x1c)) + b;
  d = (a ^ b ^ c) + le2me_32(*((uint32_t*)(param+0x00))) + d - 0x155ED806;
  d = ((d << 0x0b) | (d >> 0x15)) + a;
  c = (d ^ a ^ b) + le2me_32(*((uint32_t*)(param+0x0c))) + c - 0x2B10CF7B;
  c = ((c << 0x10) | (c >> 0x10)) + d;
  b = (c ^ d ^ a) + le2me_32(*((uint32_t*)(param+0x18))) + b + 0x04881D05;
  b = ((b << 0x17) | (b >> 0x09)) + c;
  a = (b ^ c ^ d) + le2me_32(*((uint32_t*)(param+0x24))) + a - 0x262B2FC7;
  a = ((a << 0x04) | (a >> 0x1c)) + b;
  d = (a ^ b ^ c) + le2me_32(*((uint32_t*)(param+0x30))) + d - 0x1924661B;
  d = ((d << 0x0b) | (d >> 0x15)) + a;
  c = (d ^ a ^ b) + le2me_32(*((uint32_t*)(param+0x3c))) + c + 0x1fa27cf8;
  c = ((c << 0x10) | (c >> 0x10)) + d;
  b = (c ^ d ^ a) + le2me_32(*((uint32_t*)(param+0x08))) + b - 0x3B53A99B;
  b = ((b << 0x17) | (b >> 0x09)) + c;
  
  a = ((~d | b) ^ c)  + le2me_32(*((uint32_t*)(param+0x00))) + a - 0x0BD6DDBC;
  a = ((a << 0x06) | (a >> 0x1a)) + b; 
  d = ((~c | a) ^ b)  + le2me_32(*((uint32_t*)(param+0x1c))) + d + 0x432AFF97;
  d = ((d << 0x0a) | (d >> 0x16)) + a; 
  c = ((~b | d) ^ a)  + le2me_32(*((uint32_t*)(param+0x38))) + c - 0x546BDC59;
  c = ((c << 0x0f) | (c >> 0x11)) + d; 
  b = ((~a | c) ^ d)  + le2me_32(*((uint32_t*)(param+0x14))) + b - 0x036C5FC7;
  b = ((b << 0x15) | (b >> 0x0b)) + c; 
  a = ((~d | b) ^ c)  + le2me_32(*((uint32_t*)(param+0x30))) + a + 0x655B59C3;
  a = ((a << 0x06) | (a >> 0x1a)) + b; 
  d = ((~c | a) ^ b)  + le2me_32(*((uint32_t*)(param+0x0C))) + d - 0x70F3336E;
  d = ((d << 0x0a) | (d >> 0x16)) + a; 
  c = ((~b | d) ^ a)  + le2me_32(*((uint32_t*)(param+0x28))) + c - 0x00100B83;
  c = ((c << 0x0f) | (c >> 0x11)) + d; 
  b = ((~a | c) ^ d)  + le2me_32(*((uint32_t*)(param+0x04))) + b - 0x7A7BA22F;
  b = ((b << 0x15) | (b >> 0x0b)) + c; 
  a = ((~d | b) ^ c)  + le2me_32(*((uint32_t*)(param+0x20))) + a + 0x6FA87E4F;
  a = ((a << 0x06) | (a >> 0x1a)) + b; 
  d = ((~c | a) ^ b)  + le2me_32(*((uint32_t*)(param+0x3c))) + d - 0x01D31920;
  d = ((d << 0x0a) | (d >> 0x16)) + a; 
  c = ((~b | d) ^ a)  + le2me_32(*((uint32_t*)(param+0x18))) + c - 0x5CFEBCEC;
  c = ((c << 0x0f) | (c >> 0x11)) + d; 
  b = ((~a | c) ^ d)  + le2me_32(*((uint32_t*)(param+0x34))) + b + 0x4E0811A1;
  b = ((b << 0x15) | (b >> 0x0b)) + c; 
  a = ((~d | b) ^ c)  + le2me_32(*((uint32_t*)(param+0x10))) + a - 0x08AC817E;
  a = ((a << 0x06) | (a >> 0x1a)) + b; 
  d = ((~c | a) ^ b)  + le2me_32(*((uint32_t*)(param+0x2c))) + d - 0x42C50DCB;
  d = ((d << 0x0a) | (d >> 0x16)) + a; 
  c = ((~b | d) ^ a)  + le2me_32(*((uint32_t*)(param+0x08))) + c + 0x2AD7D2BB;
  c = ((c << 0x0f) | (c >> 0x11)) + d; 
  b = ((~a | c) ^ d)  + le2me_32(*((uint32_t*)(param+0x24))) + b - 0x14792C6F;
  b = ((b << 0x15) | (b >> 0x0b)) + c; 

#ifdef LOG
  printf("real: hash output: %x %x %x %x\n", a, b, c, d);
#endif
  
  a += le2me_32(*((uint32_t *)(field+0)));
  *((uint32_t *)(field+0)) = le2me_32(a);
  b += le2me_32(*((uint32_t *)(field+4)));
  *((uint32_t *)(field+4)) = le2me_32(b);
  c += le2me_32(*((uint32_t *)(field+8)));
  *((uint32_t *)(field+8)) = le2me_32(c);
  d += le2me_32(*((uint32_t *)(field+12)));
  *((uint32_t *)(field+12)) = le2me_32(d);

#ifdef LOG
  printf("real: hash field:\n");
  hexdump(field, 64+24);
#endif
}

static void call_hash (char *key, char *challenge, int len) {

  uint32_t *ptr1, *ptr2;
  uint32_t a, b, c, d;
  uint32_t tmp;

  ptr1=(uint32_t*)(key+16);
  ptr2=(uint32_t*)(key+20);
  
  a = le2me_32(*ptr1);
  b = (a >> 3) & 0x3f;
  a += len * 8;
  *ptr1 = le2me_32(a);
  
  if (a < (len << 3))
  {
#ifdef LOG
    printf("not verified: (len << 3) > a true\n");
#endif
    ptr2 += 4;
  }

  tmp = le2me_32(*ptr2);
  tmp += (len >> 0x1d);
  *ptr2 = le2me_32(tmp);
  a = 64 - b;
  c = 0;  
  if (a <= len)
  {

    memcpy(key+b+24, challenge, a);
    hash(key, key+24);
    c = a;
    d = c + 0x3f;
    
    while ( d < len ) {

#ifdef LOG
      printf("not verified:  while ( d < len )\n");
#endif
      hash(key, challenge+d-0x3f);
      d += 64;
      c += 64;
    }
    b = 0;
  }
  
  memcpy(key+b+24, challenge+c, len-c);
}

static void calc_response (char *result, char *field) {

  char buf1[128];
  char buf2[128];
  int i;

  memset (buf1, 0, 64);
  *buf1 = 128;
  
  memcpy (buf2, field+16, 8);
  
  i = ( le2me_32(*((uint32_t*)(buf2))) >> 3 ) & 0x3f;
 
  if (i < 56) {
    i = 56 - i;
  } else {
#ifdef LOG
    printf("not verified: ! (i < 56)\n");
#endif
    i = 120 - i;
  }

  call_hash (field, buf1, i);
  call_hash (field, buf2, 8);

  memcpy (result, field, 16);

}


static void calc_response_string (char *result, char *challenge) {
 
  char field[128];
  char zres[20];
  int  i;
      
  /* initialize our field */
  BE_32C (field,      0x01234567);
  BE_32C ((field+4),  0x89ABCDEF);
  BE_32C ((field+8),  0xFEDCBA98);
  BE_32C ((field+12), 0x76543210);
  BE_32C ((field+16), 0x00000000);
  BE_32C ((field+20), 0x00000000);

  /* calculate response */
  call_hash(field, challenge, 64);
  calc_response(zres,field);
 
  /* convert zres to ascii string */
  for (i=0; i<16; i++ ) {
    char a, b;
    
    a = (zres[i] >> 4) & 15;
    b = zres[i] & 15;

    result[i*2]   = ((a<10) ? (a+48) : (a+87)) & 255;
    result[i*2+1] = ((b<10) ? (b+48) : (b+87)) & 255;
  }
}

void real_calc_response_and_checksum (char *response, char *chksum, char *challenge) {

  int   ch_len, table_len, resp_len;
  int   i;
  char *ptr;
  char  buf[128];

  /* initialize return values */
  memset(response, 0, 64);
  memset(chksum, 0, 34);

  /* initialize buffer */
  memset(buf, 0, 128);
  ptr=buf;
  BE_32C(ptr, 0xa1e9149d);
  ptr+=4;
  BE_32C(ptr, 0x0e6b3b59);
  ptr+=4;

  /* some (length) checks */
  if (challenge != NULL)
  {
    ch_len = strlen (challenge);

    if (ch_len == 40) /* what a hack... */
    {
      challenge[32]=0;
      ch_len=32;
    }
    if ( ch_len > 56 ) ch_len=56;
    
    /* copy challenge to buf */
    memcpy(ptr, challenge, ch_len);
  }
  
  if (xor_table != NULL)
  {
    table_len = strlen(xor_table);

    if (table_len > 56) table_len=56;

    /* xor challenge bytewise with xor_table */
    for (i=0; i<table_len; i++)
      ptr[i] = ptr[i] ^ xor_table[i];
  }

  calc_response_string (response, buf);

  /* add tail */
  resp_len = strlen (response);
  strcpy (&response[resp_len], "01d0a8e3");

  /* calculate checksum */
  for (i=0; i<resp_len/4; i++)
    chksum[i] = response[i*4];