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|
use pam::Client;
use xcb::Xid;
use xcb::x;
use xkbcommon::xkb;
fn get_username() -> String {
std::env::var("USER")
.or_else(|_| std::env::var("LOGNAME"))
.unwrap_or_else(|_| "root".to_string())
}
fn authenticate(username: &str, password: &str) -> bool {
let mut client = match Client::with_password("login") {
Ok(c) => c,
Err(_) => return false,
};
client
.conversation_mut()
.set_credentials(username, password);
client.authenticate().is_ok() && client.open_session().is_ok()
}
fn main() -> xcb::Result<()> {
let username = get_username();
let mut password_buf = String::new();
// make keymap
let context = xkb::Context::new(xkb::CONTEXT_NO_FLAGS);
let keymap = xkb::Keymap::new_from_names(
&context,
"", // rules
"", // model
"", // layout
"", // variant
None, // options
xkb::KEYMAP_COMPILE_NO_FLAGS,
)
.expect("Failed to create keymap");
let mut state = xkb::State::new(&keymap);
let (conn, screen_num) = xcb::Connection::connect(None)?;
let setup = conn.get_setup();
let screen = setup.roots().nth(screen_num as usize).unwrap();
let window: x::Window = conn.generate_id();
let cookie = conn.send_request_checked(&x::CreateWindow {
depth: x::COPY_FROM_PARENT as u8,
wid: window,
parent: screen.root(),
x: 0,
y: 0,
width: screen.width_in_pixels(),
height: screen.height_in_pixels(),
border_width: 0,
class: x::WindowClass::InputOutput,
visual: screen.root_visual(),
value_list: &[
x::Cw::BackPixel(screen.black_pixel()),
x::Cw::OverrideRedirect(true),
x::Cw::EventMask(
x::EventMask::EXPOSURE
| x::EventMask::KEY_PRESS
| x::EventMask::BUTTON_PRESS
| x::EventMask::POINTER_MOTION,
),
],
});
conn.check_request(cookie)?;
conn.send_request(&x::MapWindow { window });
conn.flush()?;
let grab_keyboard = conn.send_request(&x::GrabKeyboard {
owner_events: false,
grab_window: window,
time: x::CURRENT_TIME,
pointer_mode: x::GrabMode::Async,
keyboard_mode: x::GrabMode::Async,
});
let reply = conn.wait_for_reply(grab_keyboard)?;
if reply.status() != x::GrabStatus::Success {
eprintln!("Failed to grab keyboard");
return Ok(());
}
let grab_pointer = conn.send_request(&x::GrabPointer {
owner_events: false,
grab_window: window,
event_mask: x::EventMask::BUTTON_PRESS | x::EventMask::POINTER_MOTION,
pointer_mode: x::GrabMode::Async,
keyboard_mode: x::GrabMode::Async,
confine_to: x::Window::none(),
cursor: x::Cursor::none(),
time: x::CURRENT_TIME,
});
let reply = conn.wait_for_reply(grab_pointer)?;
if reply.status() != x::GrabStatus::Success {
eprintln!("Failed to grab pointer");
return Ok(());
}
// We enter the main event loop
loop {
match conn.wait_for_event()? {
xcb::Event::X(x::Event::KeyPress(ev)) => {
let keycode = ev.detail();
state.update_key(keycode.into(), xkb::KeyDirection::Down);
let keysym = state.key_get_one_sym(keycode.into());
let c = xkb::keysym_to_utf8(keysym);
match keycode {
36 => {
if authenticate(&username, &password_buf) {
conn.send_request(&x::UngrabKeyboard {
time: x::CURRENT_TIME,
});
conn.send_request(&x::UngrabPointer {
time: x::CURRENT_TIME,
});
conn.flush()?;
break Ok(());
} else {
eprintln!("Authentication failed");
password_buf.clear();
}
}
// Backspace (22)
22 => {
password_buf.pop();
}
// Escape (9) — clear buffer
9 => {
password_buf.clear();
}
_ => {
password_buf.push_str(&c);
}
}
}
xcb::Event::X(x::Event::KeyRelease(ev)) => {
let keycode = ev.detail();
state.update_key(keycode.into(), xkb::KeyDirection::Up);
}
_ => {}
}
}
}
|
