/
handles.cpp
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/
handles.cpp
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#include "handles.h"
#include "undocumented.h"
#include "exception.h"
#include "debugger.h"
typedef struct _OBJECT_NAME_INFORMATION
{
UNICODE_STRING Name;
} OBJECT_NAME_INFORMATION, *POBJECT_NAME_INFORMATION;
typedef struct _OBJECT_TYPE_INFORMATION
{
UNICODE_STRING TypeName;
ULONG TotalNumberOfObjects;
ULONG TotalNumberOfHandles;
ULONG TotalPagedPoolUsage;
ULONG TotalNonPagedPoolUsage;
ULONG TotalNamePoolUsage;
ULONG TotalHandleTableUsage;
ULONG HighWaterNumberOfObjects;
ULONG HighWaterNumberOfHandles;
ULONG HighWaterPagedPoolUsage;
ULONG HighWaterNonPagedPoolUsage;
ULONG HighWaterNamePoolUsage;
ULONG HighWaterHandleTableUsage;
ULONG InvalidAttributes;
GENERIC_MAPPING GenericMapping;
ULONG ValidAccessMask;
BOOLEAN SecurityRequired;
BOOLEAN MaintainHandleCount;
UCHAR TypeIndex; // since WINBLUE
CHAR ReservedByte;
ULONG PoolType;
ULONG DefaultPagedPoolCharge;
ULONG DefaultNonPagedPoolCharge;
} OBJECT_TYPE_INFORMATION, *POBJECT_TYPE_INFORMATION;
#define STATUS_INFO_LENGTH_MISMATCH 0xC0000004
#define STATUS_SUCCESS 0x00000000
#define SystemHandleInformation 16
#define ObjectNameInformation 1
#define ObjectTypeInformation 2
typedef enum _SYSTEM_HANDLE_FLAGS
{
PROTECT_FROM_CLOSE = 1,
INHERIT = 2
} SYSTEM_HANDLE_FLAGS;
typedef struct _SYSTEM_HANDLE_TABLE_ENTRY_INFO // Size=16
{
USHORT UniqueProcessId; // Size=2 Offset=0
USHORT CreatorBackTraceIndex; // Size=2 Offset=2
UCHAR ObjectTypeIndex; // Size=1 Offset=4
UCHAR HandleAttributes; // Size=1 Offset=5 (SYSTEM_HANDLE_FLAGS)
USHORT HandleValue; // Size=2 Offset=6
PVOID Object; // Size=4 Offset=8
ULONG GrantedAccess; // Size=4 Offset=12
} SYSTEM_HANDLE_TABLE_ENTRY_INFO, *PSYSTEM_HANDLE_TABLE_ENTRY_INFO;
typedef struct _SYSTEM_HANDLE_INFORMATION // Size=20
{
ULONG NumberOfHandles; // Size=4 Offset=0
SYSTEM_HANDLE_TABLE_ENTRY_INFO Handles[1]; // Size=16 Offset=4
} SYSTEM_HANDLE_INFORMATION, *PSYSTEM_HANDLE_INFORMATION;
typedef NTSTATUS(NTAPI* ZWQUERYSYSTEMINFORMATION)(
IN LONG SystemInformationClass,
OUT PVOID SystemInformation,
IN ULONG SystemInformationLength,
OUT PULONG ReturnLength OPTIONAL
);
typedef NTSTATUS(NTAPI* ZWQUERYOBJECT)(
IN HANDLE Handle OPTIONAL,
IN LONG ObjectInformationClass,
OUT PVOID ObjectInformation OPTIONAL,
IN ULONG ObjectInformationLength,
OUT PULONG ReturnLength OPTIONAL
);
bool HandlesEnum(duint pid, std::vector<HANDLEINFO> & handles)
{
static auto ZwQuerySystemInformation = ZWQUERYSYSTEMINFORMATION(GetProcAddress(GetModuleHandleW(L"ntdll.dll"), "ZwQuerySystemInformation"));
if(!ZwQuerySystemInformation)
return 0;
Memory<PSYSTEM_HANDLE_INFORMATION> HandleInformation(16 * 1024, "_dbg_enumhandles");
NTSTATUS ErrorCode = ERROR_SUCCESS;
for(;;)
{
ErrorCode = ZwQuerySystemInformation(SystemHandleInformation, HandleInformation(), ULONG(HandleInformation.size()), nullptr);
if(ErrorCode != STATUS_INFO_LENGTH_MISMATCH)
break;
HandleInformation.realloc(HandleInformation.size() * 2, "_dbg_enumhandles");
}
if(ErrorCode != STATUS_SUCCESS)
return false;
handles.reserve(HandleInformation()->NumberOfHandles);
HANDLEINFO info;
for(ULONG i = 0; i < HandleInformation()->NumberOfHandles; i++)
{
const auto & handle = HandleInformation()->Handles[i];
if(handle.UniqueProcessId != pid)
continue;
info.Handle = handle.HandleValue;
info.TypeNumber = handle.ObjectTypeIndex;
info.GrantedAccess = handle.GrantedAccess;
handles.push_back(info);
}
return true;
}
static DWORD WINAPI getNameThread(LPVOID lpParam)
{
(*(std::function<void()>*)lpParam)();
return 0;
}
bool HandlesGetName(HANDLE hProcess, HANDLE remoteHandle, String & name, String & typeName)
{
static auto ZwQueryObject = ZWQUERYOBJECT(GetProcAddress(GetModuleHandleW(L"ntdll.dll"), "ZwQueryObject"));
if(!ZwQueryObject)
return false;
HANDLE hLocalHandle;
if(DuplicateHandle(hProcess, remoteHandle, GetCurrentProcess(), &hLocalHandle, 0, FALSE, 0))
{
ULONG ReturnSize = 0;
if(ZwQueryObject(hLocalHandle, ObjectTypeInformation, nullptr, 0, &ReturnSize) == STATUS_INFO_LENGTH_MISMATCH)
{
ReturnSize += 0x2000;
Memory<OBJECT_TYPE_INFORMATION*> objectTypeInfo(ReturnSize + sizeof(WCHAR) * 16, "_dbg_gethandlename:objectTypeInfo");
if(ZwQueryObject(hLocalHandle, ObjectTypeInformation, objectTypeInfo(), ReturnSize, nullptr) == STATUS_SUCCESS)
typeName = StringUtils::Utf16ToUtf8(objectTypeInfo()->TypeName.Buffer);
}
std::function<void()> getName = [&]()
{
if(ZwQueryObject(hLocalHandle, ObjectNameInformation, nullptr, 0, &ReturnSize) == STATUS_INFO_LENGTH_MISMATCH)
{
ReturnSize += 0x2000;
Memory<OBJECT_NAME_INFORMATION*> objectNameInfo(ReturnSize + sizeof(WCHAR) * 16, "_dbg_gethandlename:objectNameInfo");
if(ZwQueryObject(hLocalHandle, ObjectNameInformation, objectNameInfo(), ReturnSize, nullptr) == STATUS_SUCCESS)
name = StringUtils::Utf16ToUtf8(objectNameInfo()->Name.Buffer);
}
};
auto hThread = CreateThread(nullptr, 0, getNameThread, &getName, 0, nullptr);
auto result = WaitForSingleObject(hThread, 200);
if(result != WAIT_OBJECT_0)
{
TerminateThread(hThread, 0);
name = String(ErrorCodeToName(result));
}
else
CloseHandle(hThread);
CloseHandle(hLocalHandle);
}
else
name = String(ErrorCodeToName(GetLastError()));
return true;
}
/**
\brief Get information about a window
*/
static WINDOW_INFO getWindowInfo(HWND hWnd)
{
WINDOW_INFO info;
memset(&info, 0, sizeof(info));
if(IsWindow(hWnd) != TRUE) //Not a window
{
return info;
}
info.handle = (duint)hWnd; //Get Window Handle
GetWindowRect(hWnd, &info.position); //Get Window Rect
info.style = GetWindowLong(hWnd, GWL_STYLE); //Get Window Style
info.styleEx = GetWindowLong(hWnd, GWL_EXSTYLE); //Get Window Stye ex
info.enabled = IsWindowEnabled(hWnd) == TRUE;
info.parent = (duint)GetParent(hWnd); //Get Parent Window
info.threadId = GetWindowThreadProcessId(hWnd, nullptr); //Get Window Thread Id
wchar_t limitedbuffer[256];
limitedbuffer[255] = 0;
GetWindowTextW(hWnd, limitedbuffer, 256);
if(limitedbuffer[255] != 0) //Window title too long. Add "..." to the end of buffer.
{
if(limitedbuffer[252] < 0xDC00 || limitedbuffer[252] > 0xDFFF) //protect the last surrogate of UTF-16 surrogate pair
limitedbuffer[252] = L'.';
limitedbuffer[253] = L'.';
limitedbuffer[254] = L'.';
limitedbuffer[255] = 0;
}
auto UTF8WindowTitle = StringUtils::Utf16ToUtf8(limitedbuffer);
memcpy(info.windowTitle, UTF8WindowTitle.c_str(), min(UTF8WindowTitle.size(), sizeof(info.windowTitle))); //Copy window title with repect to buffer size constraints
GetClassNameW(hWnd, limitedbuffer, 256);
if(limitedbuffer[255] != 0) //Window class too long. Add "..." to the end of buffer.
{
if(limitedbuffer[252] < 0xDC00 || limitedbuffer[252] > 0xDFFF) //protect the last surrogate of UTF-16 surrogate pair
limitedbuffer[252] = L'.';
limitedbuffer[253] = L'.';
limitedbuffer[254] = L'.';
limitedbuffer[255] = 0;
}
UTF8WindowTitle = StringUtils::Utf16ToUtf8(limitedbuffer);
memcpy(info.windowClass, UTF8WindowTitle.c_str(), min(UTF8WindowTitle.size(), sizeof(info.windowClass))); //Copy window class with repect to buffer size constraints
return info;
}
static BOOL CALLBACK getWindowInfoCallback(HWND hWnd, LPARAM lParam)
{
std::vector<WINDOW_INFO>* windowInfo = reinterpret_cast<std::vector<WINDOW_INFO>*>(lParam);
DWORD pid = 0;
GetWindowThreadProcessId(hWnd, &pid);
if(pid == fdProcessInfo->dwProcessId)
{
windowInfo->push_back(getWindowInfo(hWnd));
}
return TRUE;
}
/**
\brief Enumerates the window and return a list of all the windows owned by the debuggee (currently only top level windows)
*/
bool HandlesEnumWindows(std::vector<WINDOW_INFO> & windowsList)
{
std::vector<WINDOW_INFO> childWindowsList;
EnumWindows(getWindowInfoCallback, (LPARAM)&windowsList);
auto i = windowsList.begin();
for(auto & i = windowsList.cbegin(); i != windowsList.cend(); i++)
{
EnumChildWindows((HWND)i->handle, getWindowInfoCallback, (LPARAM)&childWindowsList);
}
for(auto & i = childWindowsList.cbegin(); i != childWindowsList.cend(); i++)
{
windowsList.push_back(*i);
}
return true;
}
/**
\brief Enumerates the heap and return a list of all the heaps in the debuggee
*/
bool HandlesEnumHeaps(std::vector<HEAPINFO> & heapList)
{
// Slow and official method to enum all heap blocks.
/*
HEAPLIST32 hl;
Handle hHeapSnap = CreateToolhelp32Snapshot(TH32CS_SNAPHEAPLIST, fdProcessInfo->dwProcessId);
hl.dwSize = sizeof(HEAPLIST32);
if(hHeapSnap == INVALID_HANDLE_VALUE)
{
return false;
}
if(Heap32ListFirst(hHeapSnap, &hl))
{
do
{
HEAPENTRY32 he;
ZeroMemory(&he, sizeof(HEAPENTRY32));
he.dwSize = sizeof(HEAPENTRY32);
if(Heap32First(&he, fdProcessInfo->dwProcessId, hl.th32HeapID))
{
do
{
HEAPINFO heapInfo;
memset(&heapInfo, 0, sizeof(heapInfo));
heapInfo.addr = he.dwAddress;
heapInfo.size = he.dwBlockSize;
heapInfo.flags = he.dwFlags;
heapList.push_back(heapInfo);
he.dwSize = sizeof(HEAPENTRY32);
}
while(Heap32Next(&he));
}
hl.dwSize = sizeof(HEAPLIST32);
}
while(Heap32ListNext(hHeapSnap, &hl));
}
else
{
return false;
}
return true;
*/
return false;
}