nevaforget
4026f6dafa
Security: prevent double unlock() when PAM and fingerprint succeed simultaneously (ext-session-lock protocol error). Fix PAM callback returning PAM_AUTH_ERR instead of PAM_BUF_ERR on calloc OOM. Performance: replace CPU-side Gaussian blur (image crate) with GPU blur via GskBlurNode + GskRenderer::render_texture(). Eliminates 500ms-2s main-thread blocking on cold cache for 4K wallpapers. Remove image and dirs dependencies (~15 transitive crates). Make fingerprint stop() fire-and-forget async to avoid 6s UI block after successful auth.
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