ZwSetIniformationFile and FileRenameInformation - c++

Question

I am trying to rename files from kernel.
with this api https://learn.microsoft.com/en-us/windows-hardware/drivers/ddi/wdm/nf-wdm-zwsetinformationfile
NTSTATUS Files::RenameFile(WCHAR* OriginalName, WCHAR* NewName)
{
// msdn says driver must be at IRQL PASSIVE_LEVEL to make calls to ZwSetInformationFile
if (KeGetCurrentIrql() != PASSIVE_LEVEL)
{
printf("IRQL invalid\n");
return STATUS_INVALID_LEVEL;
}
// Open handle to file , providing OriginalName with full path, example: "\\DosDevices\\C:\\named_file.txt"
// also to be able to rename files u delete the DELETE permission, but i assume with GENERIC_ALL is already giving me enough of them
auto FileHandle = Files(OriginalName, Files::OpenExisting, GENERIC_ALL, 0);
if (FileHandle.CreationStatus != STATUS_SUCCESS)
{
printf("Failed to open handle to file %ws. ERR: 0x%x\n", OriginalName, FileHandle.CreationStatus);
return FileHandle.CreationStatus;
}
IO_STATUS_BLOCK ioStatusBlock;
// msnd info for ZwSetInformatonFile when using FileRenameInformation class says that size must be the size of the
// structure + size of new name in bytes
const auto size = sizeof(FILE_RENAME_INFORMATION) + sizeof(NewName);
// allocate resources for struct
const auto rename_info = static_cast<PFILE_RENAME_INFORMATION>(ExAllocatePool(PagedPool, size));
if(rename_info == nullptr)
{
printf("Failed allocating rename info structure\n");
FileHandle.Close();
return STATUS_INSUFFICIENT_RESOURCES;
}
memset(rename_info, 0, size);
wcscpy(rename_info->FileName, NewName);
rename_info->FileNameLength = sizeof(NewName);// size in bytes
rename_info->RootDirectory = nullptr; // msnd: must be null if the filename is the absolute path
rename_info->ReplaceIfExists = false; // i dont want to replace if exissts
const auto status = ZwSetInformationFile(FileHandle.hFile, &ioStatusBlock, rename_info, size, FileRenameInformation);
// free resources
ExFreePool(rename_info);
FileHandle.Close();
// ZwSetInformationFile fails with 0xc0000034 STATUS_OBJECT_NAME_NOT_FOUND
if(status != STATUS_SUCCESS)
{
printf("0x%x : %ws\n", status, rename_info->FileName); // -> 0xc0000034 : "\\DosDevices\\C:\\renamed_file.txt"
return status;
}
printf("Renamed %ws to %ws\n", OriginalName, NewName);
return STATUS_SUCCESS;
}
i commented a bit of the code, but TLDR; it gives me 0xc0000034 STATUS_OBJECT_NAME_NOT_FOUND.
I followed everything as stated in the MSDN but im always with the same issue, the originalname file does exist in disk since it opens handle succesfully.
any help is appreciated, thanks