hidden/Hidden/Helper.h

#pragma once

#include <Ntddk.h>

typedef enum _SYSTEM_INFORMATION_CLASS {
	SystemBasicInformation = 0,
	SystemPerformanceInformation = 2,
	SystemTimeOfDayInformation = 3,
	SystemProcessInformation = 5,
	SystemProcessorPerformanceInformation = 8,
	SystemInterruptInformation = 23,
	SystemExceptionInformation = 33,
	SystemRegistryQuotaInformation = 37,
	SystemLookasideInformation = 45,
	SystemPolicyInformation = 134,
} SYSTEM_INFORMATION_CLASS;

typedef struct _SYSTEM_PROCESS_INFORMATION {
	ULONG           NextEntryOffset;
	ULONG           NumberOfThreads;
	LARGE_INTEGER   Reserved[3];
	LARGE_INTEGER   CreateTime;
	LARGE_INTEGER   UserTime;
	LARGE_INTEGER   KernelTime;
	UNICODE_STRING  ImageName;
	KPRIORITY       BasePriority;
	HANDLE          ProcessId;
	HANDLE          InheritedFromProcessId;
	ULONG           HandleCount;
	UCHAR           Reserved4[4];
	PVOID           Reserved5[11];
	SIZE_T          PeakPagefileUsage;
	SIZE_T          PrivatePageCount;
	LARGE_INTEGER   Reserved6[6];
} SYSTEM_PROCESS_INFORMATION, *PSYSTEM_PROCESS_INFORMATION;

typedef struct _LDR_DATA_TABLE_ENTRY {
	LIST_ENTRY     LoadOrder;
	LIST_ENTRY     MemoryOrder;
	LIST_ENTRY     InitializationOrder;
	PVOID          ModuleBaseAddress;
	PVOID          EntryPoint;
	ULONG          ModuleSize;
	UNICODE_STRING FullModuleName;
	UNICODE_STRING ModuleName;
	ULONG          Flags;
	USHORT         LoadCount;
	USHORT         TlsIndex;
	union {
		LIST_ENTRY Hash;
		struct {
			PVOID SectionPointer;
			ULONG CheckSum;
		} s;
	} u;
	ULONG   TimeStamp;
} LDR_DATA_TABLE_ENTRY, *PLDR_DATA_TABLE_ENTRY;

NTSYSAPI NTSTATUS NTAPI ZwQuerySystemInformation(
	_In_      SYSTEM_INFORMATION_CLASS SystemInformationClass,
	_Inout_   PVOID                    SystemInformation,
	_In_      ULONG                    SystemInformationLength,
	_Out_opt_ PULONG                   ReturnLength
);

NTSYSAPI NTSTATUS NTAPI ZwQueryInformationProcess(
	_In_      HANDLE                    ProcessHandle,
	_In_      PROCESSINFOCLASS          ProcessInformationClass,
	_Out_     PVOID                     ProcessInformation,
	_In_      ULONG                     ProcessInformationLength,
	_Out_opt_ PULONG                    ReturnLength
);

_Must_inspect_result_
_IRQL_requires_max_(APC_LEVEL)
NTKERNELAPI
NTSTATUS
PsLookupProcessByProcessId(
	_In_ HANDLE ProcessId,
	_Outptr_ PEPROCESS* Process
);

typedef struct _HANDLE_TABLE_ENTRY {
	union
	{
		PVOID Object;
		ULONG ObAttributes;
		PVOID InfoTable;
		ULONG Value;
	} u1;
	union
	{
		ULONG GrantedAccess;
		struct
		{
			USHORT GrantedAccessIndex;
			USHORT CreatorBackTraceIndex;
		} s1;
		LONG NextFreeTableEntry;
	} u2;
} HANDLE_TABLE_ENTRY, *PHANDLE_TABLE_ENTRY;

typedef BOOLEAN(*EX_ENUMERATE_HANDLE_ROUTINE)(
	IN PHANDLE_TABLE_ENTRY HandleTableEntry,
	IN HANDLE Handle,
	IN PVOID EnumParameter
);

NTKERNELAPI
BOOLEAN
ExEnumHandleTable(
	_In_  PVOID HandleTable,
	_In_  EX_ENUMERATE_HANDLE_ROUTINE EnumHandleProcedure,
	_In_  PVOID EnumParameter,
	_Out_opt_ PHANDLE Handle
);

NTSTATUS QuerySystemInformation(SYSTEM_INFORMATION_CLASS Class, PVOID* InfoBuffer, PSIZE_T InfoSize);
NTSTATUS QueryProcessInformation(PROCESSINFOCLASS Class, HANDLE ProcessId, PVOID* InfoBuffer, PSIZE_T InfoSize);
VOID FreeInformation(PVOID Buffer);

#define NORMALIZE_INCREAMENT (USHORT)0x200

NTSTATUS NormalizeDevicePath(PCUNICODE_STRING Path, PUNICODE_STRING Normalized);

#define _LogMsg(lvl, lvlname, frmt, ...) DbgPrintEx(DPFLTR_IHVDRIVER_ID, lvl , "[" lvlname "] [irql:%Iu,pid:%Iu] hidden!" __FUNCTION__ ": " frmt "\n", KeGetCurrentIrql(), PsGetCurrentProcessId(), __VA_ARGS__)

#define LogError(frmt,   ...) _LogMsg(DPFLTR_ERROR_LEVEL,   "error",   frmt, __VA_ARGS__)
#define LogWarning(frmt, ...) _LogMsg(DPFLTR_WARNING_LEVEL, "warning", frmt, __VA_ARGS__)
#define LogTrace(frmt,   ...) _LogMsg(DPFLTR_TRACE_LEVEL,   "trace",   frmt, __VA_ARGS__)
#define LogInfo(frmt,    ...) _LogMsg(DPFLTR_INFO_LEVEL,    "info",    frmt, __VA_ARGS__)