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未解决 [求助] 100雪币

发表于: 2024-8-20 15:10 1423

未解决 [求助] 100雪币

greatzdl

2024-8-20 15:10

1423

最近在看一个化学软件，是一个比较古老的软件，看怎么绕过。

用ida 调试了，找到了关键的那个key比较的函数，但是不知道下边怎么继续了。

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char LPInit()
{
  int v0; // eax
  int v1; // eax
  int v2; // eax
  int v3; // eax
  int v4; // eax
  int v5; // eax
  char *v6; // eax
  char *v7; // eax
  _BYTE timesthru[528]; // [esp+0h] [ebp-210h] BYREF
 
  memset(timesthru, 0xCCu, sizeof(timesthru));
  dwVersion = GetVersion();
  gOnline = 1;
  gOnlineTHOR = 1;
  gOnlineQSAR = 1;
  gOtherOnline = 1;
  idosversion = HIBYTE(dwVersion) + BYTE2(dwVersion) / 10;
  GetModuleFileNameA(hInst, szAppFileName, 0x400u);
  strncpy(&driveletter, szAppFileName, 1u);
  *(_DWORD *)&timesthru[12] = &driveletter;
  idrivenumber = (driveletter & 0x7F) - 65;
  *(_DWORD *)&timesthru[16] = 0;
  *(_DWORD *)timesthru = 0;
  gNewLicense = 0;
  OpenLPfile();
  ReadLPfile();
  *(_DWORD *)&timesthru[8] = byte_588E95;
  if ( !strstr(byte_588E95, aThor) )
    gOnlineTHOR = 0;
  if ( !strstr(*(const char **)&timesthru[8], aQsar) )
    gOnlineQSAR = 0;
  if ( !strstr(*(const char **)&timesthru[8], aOtheronline) )
    gOtherOnline = 0;
  if ( !strstr(*(const char **)&timesthru[8], aNohardid) )
  {
    *(_DWORD *)&timesthru[12] = gHardID;
    *(_DWORD *)&timesthru[4] = byte_58948F;
    if ( memcmp(gHardID, byte_58948F, 0xAu) )
      LPerror(5);
  }
  if ( !strstr(*(const char **)&timesthru[8], aNodosid) && (double)idosversion >= dbl_4ECF38 )
    LPerror(13);
  CopyLicenseToGlobals();
  strcpy(gPCExpire, gExpire);
  *(_DWORD *)&timesthru[12] = strstr(gPCExpire, asc_4ECE70);
  if ( *(_DWORD *)&timesthru[12] )
  {
    **(_BYTE **)&timesthru[12] = 0;
    strcpy(gOnlineExpire, (const char *)(*(_DWORD *)&timesthru[12] + 1));
  }
  else
  {
    strcpy(gOnlineExpire, byte_4ECE74);
  }
  while ( 1 )
  {
    while ( 1 )
    {
      if ( !*(_DWORD *)timesthru )
      {
        if ( *(_DWORD *)&timesthru[16] && LicenseOnCB() )
        {
          CopyClipboardToGlobals();
          CopyGlobalsToLicense();
          *(_DWORD *)&timesthru[16] = 0;
          *(_DWORD *)timesthru = 1;
        }
        else if ( LicenseOnCB() && (!gOwner || !gSite || !gPhone || !gExpire[0] || !gKey) )
        {
          *(_DWORD *)timesthru = 1;
        }
      }
      if ( *(_DWORD *)&timesthru[16] || !gOwner || !gSite || !gPhone || !gExpire[0] || !gKey )
      {
        GetRegistration();
        *(_DWORD *)timesthru = 2;
      }
      *(_DWORD *)&timesthru[16] = 0;
      MD5Init((int)&timesthru[424]);
      *(_DWORD *)&timesthru[4] = License;
      v0 = strlen(License);
      MD5Update((int)&timesthru[424], *(int *)&timesthru[4], v0);
      *(_DWORD *)&timesthru[4] = byte_588C97;
      v1 = strlen(byte_588C97);
      MD5Update((int)&timesthru[424], *(int *)&timesthru[4], v1);
      *(_DWORD *)&timesthru[4] = byte_588D96;
      v2 = strlen(byte_588D96);
      MD5Update((int)&timesthru[424], *(int *)&timesthru[4], v2);
      *(_DWORD *)&timesthru[4] = byte_588F94;
      v3 = strlen(byte_588F94);
      MD5Update((int)&timesthru[424], *(int *)&timesthru[4], v3);
      *(_DWORD *)&timesthru[4] = byte_588E95;
      v4 = strlen(byte_588E95);
      MD5Update((int)&timesthru[424], *(int *)&timesthru[4], v4);
      *(_DWORD *)&timesthru[4] = byte_589093;
      v5 = strlen(byte_589093);
      MD5Update((int)&timesthru[424], *(int *)&timesthru[4], v5);
      MD5Final((int)&timesthru[424]);
      *(_DWORD *)&timesthru[12] = &timesthru[412];
      *(_DWORD *)&timesthru[4] = byte_589390;
      *(_DWORD *)&timesthru[20] = 0;
      while ( *(int *)&timesthru[20] < 5 )
      {
        sprintf(
          (char *const)(*(_DWORD *)&timesthru[12] + 2 * *(_DWORD *)&timesthru[20]),
          "%02x",
          (unsigned __int8)timesthru[*(_DWORD *)&timesthru[20] + 512]);
        ++*(_DWORD *)&timesthru[20];
      }
      if ( !memcmp(*(const void **)&timesthru[12], *(const void **)&timesthru[4], 0xAu) )
        break;
      if ( *(_DWORD *)timesthru )
      {
        LPerror(-1);
        ++*(_DWORD *)timesthru;
      }
      *(_DWORD *)&timesthru[16] = 1;
    }
    if ( *(_DWORD *)timesthru == 1 )
    {
      gNewLicense = 1;
      SaveLP();
    }
    if ( !memcmp(gPCExpire, aNone_0, 4u) )
      break;
    time((__time32_t *const)&timesthru[152]);
    sscanf(gPCExpire, "%d/%d/%d", &timesthru[36], &timesthru[28], &timesthru[32]);
    *(_DWORD *)&timesthru[124] = *(_DWORD *)&timesthru[28] - 1;
    *(_DWORD *)&timesthru[120] = *(_DWORD *)&timesthru[32];
    *(_DWORD *)&timesthru[108] = 0;
    *(_DWORD *)&timesthru[116] = 0;
    *(_DWORD *)&timesthru[112] = 0;
    *(_DWORD *)&timesthru[140] = -1;
    *(_DWORD *)&timesthru[128] = *(_DWORD *)&timesthru[36] - 1900;
    *(_DWORD *)&timesthru[148] = mktime((struct tm *const)&timesthru[108]);
    if ( *(int *)&timesthru[152] <= *(int *)&timesthru[148] )
    {
      if ( *(int *)&timesthru[152] < *(_DWORD *)&timesthru[148] + 2592000 )
      {
        v6 = ctime((const __time32_t *const)&timesthru[148]);
        strcpy(&timesthru[40], v6);
        *(_DWORD *)&timesthru[20] = 11;
        while ( *(int *)&timesthru[20] < 15 )
        {
          timesthru[*(_DWORD *)&timesthru[20] + 40] = timesthru[*(_DWORD *)&timesthru[20] + 49];
          ++*(_DWORD *)&timesthru[20];
        }
        timesthru[55] = 0;
        sprintf(&timesthru[156], "%s\r\n\t%s\r\n\r\n%s", aBioLoomPeriodE, &timesthru[40], aPleaseContactB);
        SimpErrMesg((int)&timesthru[156]);
      }
      break;
    }
    LPerror(-3);
    *(_DWORD *)&timesthru[16] = 1;
  }
  if ( strlen(gOnlineExpire) )
  {
    if ( memcmp(gOnlineExpire, aNone_0, 4u) )
    {
      time((__time32_t *const)&timesthru[152]);
      sscanf(gOnlineExpire, "%d/%d/%d", &timesthru[36], &timesthru[28], &timesthru[32]);
      *(_DWORD *)&timesthru[88] = *(_DWORD *)&timesthru[28] - 1;
      *(_DWORD *)&timesthru[84] = *(_DWORD *)&timesthru[32];
      *(_DWORD *)&timesthru[72] = 0;
      *(_DWORD *)&timesthru[80] = 0;
      *(_DWORD *)&timesthru[76] = 0;
      *(_DWORD *)&timesthru[104] = -1;
      *(_DWORD *)&timesthru[92] = *(_DWORD *)&timesthru[36] - 1900;
      *(_DWORD *)&timesthru[144] = mktime((struct tm *const)&timesthru[72]);
      if ( *(int *)&timesthru[152] <= *(int *)&timesthru[144] )
      {
        if ( *(int *)&timesthru[152] < *(_DWORD *)&timesthru[144] + 2592000 )
        {
          gOnline = 1;
          v7 = ctime((const __time32_t *const)&timesthru[144]);
          strcpy(&timesthru[40], v7);
          *(_DWORD *)&timesthru[20] = 11;
          while ( *(int *)&timesthru[20] < 15 )
          {
            timesthru[*(_DWORD *)&timesthru[20] + 40] = timesthru[*(_DWORD *)&timesthru[20] + 49];
            ++*(_DWORD *)&timesthru[20];
          }
          timesthru[55] = 0;
          sprintf(&timesthru[156], "%s\r\n\t%s\r\n\r\n%s", aOnlineSubscrip, &timesthru[40], aPleaseContactB);
          SimpErrMesg((int)&timesthru[156]);
        }
      }
      else
      {
        gOnline = 0;
      }
    }
  }
  else
  {
    gOnline = 0;
  }
  return 0;
}