BiGetPartitionVhdFilePathFromUnicodeString

WCHAR *__stdcall BiGetPartitionVhdFilePathFromUnicodeString(_UNICODE_STRING *NtDeviceVolumePath, WCHAR *OutputBuffer){
  wchar_t *Buffer; 
  ULONG OutputBufferLength; 
  int i; 
  wchar_t *PoolWithTag; 
  NTSTATUS v6; 
  struct _IO_STATUS_BLOCK IoStatusBlock; 
  struct _OBJECT_ATTRIBUTES ObjectAttributes; 
  int InputBuffer; 
  UNICODE_STRING FileHandle; 
  *(&ObjectAttributes.Length + 1) = 0;
  memset(&ObjectAttributes.Attributes + 1, 0, 20);
  InputBuffer = 0;
  FileHandle.Buffer = 0i64;
  Buffer = 0i64;
  ObjectAttributes.RootDirectory = 0i64;
  *(_QWORD *)&FileHandle.Length = 0i64;
  ObjectAttributes.ObjectName = NtDeviceVolumePath;
  IoStatusBlock = 0i64;
  ObjectAttributes.Length = 48;
  ObjectAttributes.Attributes = 576;
  if( ZwOpenFile(&FileHandle, (PWCHAR)0xC0100000i64) >= 0 )
  {
    OutputBufferLength = 520;
    for( i = 1; ; i = 2 )
    {
      PoolWithTag = (wchar_t *)ExAllocatePoolWithTag(PagedPool, OutputBufferLength, 0x4B444342ui64);
      Buffer = PoolWithTag;
      if( !PoolWithTag )
        break;
      InputBuffer = 1;
      v6 = ZwDeviceIoControlFile(
             *(HANDLE *)&FileHandle.Length,
             0i64,
             0i64,
             0i64,
             &IoStatusBlock,
             0x2D5928u,
             &InputBuffer,
             4u,
             PoolWithTag,
             OutputBufferLength);
      if( v6 != -1073741789 )
        goto LABEL_5;
      if( i != 1 )
        goto LABEL_6;
      OutputBufferLength = *(_DWORD *)Buffer;
      ExFreePoolWithTag(Buffer, 0x4B444342u);
    }
    v6 = -1073741801;
LABEL_5:
    if( v6 < 0 )
    {
LABEL_6:
      if( Buffer )
      {
        ExFreePoolWithTag(Buffer, 0x4B444342u);
        Buffer = 0i64;
      }
      goto LABEL_8;
    }
    if( (int)BiTranslateSymbolicLinkFile(Buffer, &FileHandle.Buffer) >= 0 )
    {
      ExFreePoolWithTag(Buffer, 0x4B444342u);
      Buffer = FileHandle.Buffer;
    }
  }
LABEL_8:
  if( *(_QWORD *)&FileHandle.Length )
    ZwClose(*(HANDLE *)&FileHandle.Length);
  return Buffer;
}

Referenced by: