Sometimes, you need to manipulate low-level functionality (C APIs, etc) from high-level languages (Python). Eg. Force the low-level side calls directly to your own Python override functions. This repo will help you do that.
It's python version of my Cpp Hooking👌
✅ Windows
✅ Linux
✅ MacOS
✅ iOS
✅ Android
pip3 install git+https://github.com/vic4key/py-hooking.git
See doc comments in the PyHooking.py file
Eg. To hook & unhook a function, you only need to write codes as the following
Example with mylib.print_message
import ctypes
from PyHooking import *
# define the hook function
mylib = load_external_shared_library(f"Examples/mylib_{arch}_{bits}")
@PyHooking.CPrototype(ctypes.CFUNCTYPE(None, ctypes.c_char_p))
def hk_print_message(message):
message = f"Invoked `hk_print_message('{message.decode('utf-8')}')`"
PyHooking().invoke(mylib.print_message, message.encode())
# perform hooking
PyHooking().hook(mylib.print_message, hk_print_message)
mylib.print_message(b"This is a string from Python code")
mylib.c_invoke_print_message()
# perform unhooking
PyHooking().unhook(mylib.print_message)
mylib.print_message(b"This is a string from Python code")
mylib.c_invoke_print_message()
# result
'''
Invoked `hk_print_message('This is a string from Python code')`
Invoked `hk_print_message('This is a string from C code')`
This is a string from Python code
This is a string from C code
'''Example with user32.MessageBoxA
import ctypes
from PyHooking import *
# define the hook function
user32 = ctypes.CDLL(ctypes.util.find_library("user32"))
@PyHooking.CPrototype(ctypes.CFUNCTYPE(ctypes.c_int, ctypes.c_void_p, ctypes.c_char_p, ctypes.c_char_p, ctypes.c_ulong))
def hk_MessageBoxA(hWnd, lpText, lpCaption, uType):
lpText = f"Invoked `hk_MessageBoxA({hWnd}, '{lpText.decode('utf-8')}', '{lpCaption.decode('utf-8')}', {uType})`"
return PyHooking().invoke(user32.MessageBoxA, hWnd, lpText.encode(), lpCaption, uType)
# perform hooking
PyHooking().hook(user32.MessageBoxA, hk_MessageBoxA)
user32.MessageBoxA(0, b"text 1", b"", 0)
# perform unhooking
PyHooking().unhook(user32.MessageBoxA)
user32.MessageBoxA(0, b"text 2", b"", 0)
# result
'''
Invoked `hk_MessageBoxA(None, 'text 1', '', 0)`
<empty>
'''