RenHook
An open-source x86 / x86-64 hooking library for Windows.
Features
- Supports x86 and x86-64 (uses Zydis as diassembler)
- Completely written in C++11
- Safe and easy to use
- Hooking methods
- Inline hook - Patches the prologue of a function to redirect its code flow, also allocates a trampoline to that can be used to execute the original function.
Quick examples
Hooking by address
#include <Windows.h>
#include <renhook/renhook.hpp>
void func_detour();
using func_t = void(*)();
renhook::inline_hook<func_t> func_hook(0x14000000, &func_detour);
void func_detour()
{
OutputDebugStringA("Hello from the hook!\n");
func_hook();
}
int APIENTRY wWinMain(_In_ HINSTANCE hInstance, _In_opt_ HINSTANCE hPrevInstance, _In_ LPWSTR lpCmdLine, _In_ int nCmdShow)
{
func_hook.attach();
func_hook();
func_hook.detach();
func_hook();
return 0;
}Hooking by pattern
#include <Windows.h>
#include <renhook/renhook.hpp>
void func_detour();
using func_t = void(*)();
renhook::inline_hook<func_t> func_hook({ 0x89, 0x79, 0xF8, 0xE8, 0xCC, 0xCC, 0xCC, 0xCC, 0x8B, 0x0D, 0xCC, 0xCC, 0xCC, 0xCC }, &func_detour, 0xCC, 3);
void func_detour()
{
OutputDebugStringA("Hello from the hook!\n");
func_hook();
}
int APIENTRY wWinMain(_In_ HINSTANCE hInstance, _In_opt_ HINSTANCE hPrevInstance, _In_ LPWSTR lpCmdLine, _In_ int nCmdShow)
{
func_hook.attach();
func_hook();
func_hook.detach();
func_hook();
return 0;
}Hooking a function from a module
#include <Windows.h>
#include <renhook/renhook.hpp>
int WINAPI msgbox_detour(HWND wnd, LPCWSTR text, LPCWSTR caption, UINT type);
using MessageBoxW_t = int(WINAPI*)(HWND, LPCWSTR, LPCWSTR, UINT);
renhook::inline_hook<MessageBoxW_t> msgbox_hook("user32", "MessageBoxW", &msgbox_detour);
int WINAPI msgbox_detour(HWND wnd, LPCWSTR text, LPCWSTR caption, UINT type)
{
return msgbox_hook(wnd, L"Hello from the hook!", L"RenHook", MB_OK | MB_ICONINFORMATION);
}
int APIENTRY wWinMain(_In_ HINSTANCE hInstance, _In_opt_ HINSTANCE hPrevInstance, _In_ LPWSTR lpCmdLine, _In_ int nCmdShow)
{
msgbox_hook.attach();
MessageBoxW(nullptr, L"Hello", L"Message", MB_OK);
msgbox_hook.detach();
MessageBoxW(nullptr, L"Hello", L"Message", MB_OK);
return 0;
}Build instructions
Requirements
Windows
- Download and install Visual Studio 2019 Community Edition or a higher version.
- Download and install the Requirements.
- Clone this repository.
- Clone the dependencies (
git submodule update --init --recursive). - Create a directory named
buildand run CMake in it. - Open the solution (RenHook.sln) located in build directory.
- Build the projects.