[WDK] RtlGetVersion 함수

NTSTATUS NTAPI
RtlGetVersion(RTL_OSVERSIONINFOW *Info)
{

    if (Info->dwOSVersionInfoSize == sizeof(RTL_OSVERSIONINFOW) ||
        Info->dwOSVersionInfoSize == sizeof(RTL_OSVERSIONINFOEXW))
   {
       PPEB Peb = NtCurrentPeb();

        Info->dwMajorVe rsion = Peb->OSMajorVersion;
        Info->dwMinorVe rsion = Peb->OSMinorVersion;
        Info->dwBuildNu mber = Peb->OSBuildNumber;
        Info->dwPlatfor mId = Peb->OSPlatformId;

        if(((Peb->OSCSD Version >> 8) & 0xFF) != 0)
       {
         int i = _snwprintf(Info->szCSDVersion,
                                   (sizeof(Info ->szCSDVersion) / sizeof(Info->szCSDVersion[0])) - 1,
                                   L"Service  Pack %d",
                                   ((Peb->OS CSDVersion >> 8) & 0xFF));

         Info->szCSDVersion = L'\0';
       }

       else
       {
         RtlZeroMemory(Info->szCSDVersion, sizeof(Info->szCSDVersion));
       }

       if (Info->dwOSVersionInfoSize == sizeof(RTL_OSVERSIONINFOEXW))
       {

             RTL_OSVERSIONINFOEXW  *InfoEx = (RTL_OSVERSIONINFOEXW *)Info;
              InfoEx->wServicePackMajor  = (Peb->OSCSDVersion >> 8) & 0xFF;
              InfoEx->wServicePackMinor  = Peb->OSCSDVersion & 0xFF;
              InfoEx->wSuiteMask  = SharedUserData->SuiteMask;
              InfoEx->wProductType  = SharedUserData->NtProductType;
       }

       return STATUS_SUCCESS;
    }

 
    return STATUS_INVALID_PARAMETER;
}