给定 Windows 注册表项的句柄(例如由 ::RegOpenKeyEx() 设置的句柄),是否可以确定该注册表项的完整路径?
我意识到在一个简单的应用程序中,您所要做的就是查找 5 或 10 行并阅读...但是在像我正在调试的复杂应用程序中,我感兴趣的密钥可以从一系列中打开的通话。
Use LoadLibrary
and NtQueryKey
导出的函数如以下代码片段所示。
#include <windows.h>
#include <string>
typedef LONG NTSTATUS;
#ifndef STATUS_SUCCESS
#define STATUS_SUCCESS ((NTSTATUS)0x00000000L)
#endif
#ifndef STATUS_BUFFER_TOO_SMALL
#define STATUS_BUFFER_TOO_SMALL ((NTSTATUS)0xC0000023L)
#endif
std::wstring GetKeyPathFromKKEY(HKEY key)
{
std::wstring keyPath;
if (key != NULL)
{
HMODULE dll = LoadLibrary(L"ntdll.dll");
if (dll != NULL) {
typedef DWORD (__stdcall *NtQueryKeyType)(
HANDLE KeyHandle,
int KeyInformationClass,
PVOID KeyInformation,
ULONG Length,
PULONG ResultLength);
NtQueryKeyType func = reinterpret_cast<NtQueryKeyType>(::GetProcAddress(dll, "NtQueryKey"));
if (func != NULL) {
DWORD size = 0;
DWORD result = 0;
result = func(key, 3, 0, 0, &size);
if (result == STATUS_BUFFER_TOO_SMALL)
{
size = size + 2;
wchar_t* buffer = new (std::nothrow) wchar_t[size/sizeof(wchar_t)]; // size is in bytes
if (buffer != NULL)
{
result = func(key, 3, buffer, size, &size);
if (result == STATUS_SUCCESS)
{
buffer[size / sizeof(wchar_t)] = L'\0';
keyPath = std::wstring(buffer + 2);
}
delete[] buffer;
}
}
}
FreeLibrary(dll);
}
}
return keyPath;
}
int _tmain(int argc, _TCHAR* argv[])
{
HKEY key = NULL;
LONG ret = ERROR_SUCCESS;
ret = RegOpenKey(HKEY_LOCAL_MACHINE, L"SOFTWARE\\Microsoft", &key);
if (ret == ERROR_SUCCESS)
{
wprintf_s(L"Key path for %p is '%s'.", key, GetKeyPathFromKKEY(key).c_str());
RegCloseKey(key);
}
return 0;
}
这将在控制台上打印关键路径:
00000FDC 的关键路径是
'\注册表\机器\软件\微软'。
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