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/* SPDX-License-Identifier: GPL-2.0
*
* Copyright (C) 2018-2020 WireGuard LLC. All Rights Reserved.
*/
#include "pch.h"
WINTUN_STATUS
ResourceGetAddress(_In_z_ const WCHAR *ResourceName, _Out_ const void **Address, _Out_ DWORD *Size)
{
HRSRC FoundResource = FindResourceW(ResourceModule, ResourceName, RT_RCDATA);
if (!FoundResource)
return LOG_LAST_ERROR(L"Failed to find resource");
*Size = SizeofResource(ResourceModule, FoundResource);
if (!*Size)
return LOG_LAST_ERROR(L"Failed to size resource");
HGLOBAL LoadedResource = LoadResource(ResourceModule, FoundResource);
if (!LoadedResource)
return LOG_LAST_ERROR(L"Failed to load resource");
*Address = LockResource(LoadedResource);
if (!*Address)
{
LOG(WINTUN_LOG_ERR, L"Failed to lock resource");
return ERROR_LOCK_FAILED;
}
return ERROR_SUCCESS;
}
WINTUN_STATUS
ResourceCopyToFile(_In_z_ const WCHAR *DestinationPath, _In_z_ const WCHAR *ResourceName)
{
const void *LockedResource;
DWORD SizeResource;
DWORD Result = ResourceGetAddress(ResourceName, &LockedResource, &SizeResource);
if (Result != ERROR_SUCCESS)
return LOG(WINTUN_LOG_ERR, L"Failed to locate resource"), Result;
HANDLE DestinationHandle = CreateFileW(
DestinationPath,
GENERIC_WRITE,
0,
&SecurityAttributes,
CREATE_NEW,
FILE_ATTRIBUTE_NORMAL | FILE_ATTRIBUTE_TEMPORARY,
NULL);
if (DestinationHandle == INVALID_HANDLE_VALUE)
return LOG_LAST_ERROR(L"Failed to create file");
DWORD BytesWritten;
if (!WriteFile(DestinationHandle, LockedResource, SizeResource, &BytesWritten, NULL))
Result = LOG_LAST_ERROR(L"Failed to write file");
if (BytesWritten != SizeResource)
{
LOG(WINTUN_LOG_ERR, L"Incomplete write");
Result = Result != ERROR_SUCCESS ? Result : ERROR_WRITE_FAULT;
}
CloseHandle(DestinationHandle);
return Result;
}
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