nevaforget
d11b6e634e
Close the only exploitable auth bypass: validate VerifyStatus signal sender against fprintd's unique bus name. Fix fingerprint D-Bus lifecycle so devices are properly released on verify-match and async restarts check the running flag between awaits. Security: num_msg guard in PAM callback, symlink rejection for background_path, peek icon disabled, TOML parse errors logged, panic hook before logging. Performance: blur and avatar textures cached across monitors, release profile with LTO/strip.
Moonlock
A secure Wayland lockscreen with GTK4, PAM authentication and fingerprint support. Part of the Moonarch ecosystem.
Features
- ext-session-lock-v1 — Protocol-guaranteed screen locking (compositor keeps screen locked on crash)
- PAM authentication — Uses system PAM stack (
/etc/pam.d/moonlock) - Fingerprint unlock — fprintd D-Bus integration, async init (optional, window appears instantly)
- Multi-monitor — Lockscreen on every monitor, single shared fingerprint listener
- i18n — German and English (auto-detected)
- Faillock warning — UI counter + system pam_faillock
- Panic safety — Panic hook logs but never unlocks
- Password wiping — Zeroize on drop
Requirements
- GTK 4
- gtk4-session-lock (ext-session-lock-v1 support)
- PAM (
/etc/pam.d/moonlock) - Optional: fprintd for fingerprint support
Building
cargo build --release
Installation
# Install binary
sudo install -Dm755 target/release/moonlock /usr/bin/moonlock
# Install PAM config
sudo install -Dm644 config/moonlock-pam /etc/pam.d/moonlock
# Optional: Install example config
sudo install -Dm644 config/moonlock.toml.example /etc/moonlock/moonlock.toml.example
Configuration
Create /etc/moonlock/moonlock.toml or ~/.config/moonlock/moonlock.toml:
background_path = "/usr/share/wallpapers/moon.jpg"
fingerprint_enabled = true
Usage
Typically launched via keybind in your Wayland compositor:
# Niri keybind example
binds {
Mod+L { spawn "moonlock"; }
}
Development
cargo test
cargo build --release
LD_PRELOAD=/usr/lib/libgtk4-layer-shell.so ./target/release/moonlock
License
MIT