Address findings from second triple audit (quality, performance, security):
- Wrap PAM CString password in Zeroizing<CString> to wipe on drop (S-H1)
- Add check_account() for pam_acct_mgmt after fingerprint unlock,
with resume_async() to restart FP on transient failure (S-M1)
- 30s PAM timeout with generation counter to prevent stale result
interference from parallel auth attempts (S-M3)
- Downscale wallpaper to max 1920px before GPU blur, reducing work
by ~4x on 4K wallpapers (P-M1)
- exit(1) instead of return on no-monitor after lock.lock() (Q-2.1)
Colloid-Catppuccin theme loaded via ~/.config/gtk-4.0/gtk.css at
PRIORITY_USER (800) was overriding moonlock's PRIORITY_APPLICATION (600),
causing avatar to lose its circular border-radius.
- Use STYLE_PROVIDER_PRIORITY_USER for app CSS provider
- Replace border-radius: 50% with 9999px (GTK4 CSS percentage quirk)
GskBlurNode samples pixels outside texture bounds as transparent,
causing visible darkening at wallpaper edges. Fix renders the texture
with 3x-sigma padding before blur, then clips back to original size.
Symmetric fix with moonset v0.7.1.
Wallpaper is installed by moonarch to /usr/share/moonarch/wallpaper.jpg.
Embedding a 374K JPEG in the binary was redundant. Without a wallpaper
file, GTK background color (Catppuccin Mocha base) shows through.
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.
First launch with blur blurs and saves to ~/.cache/moonlock/.
Subsequent starts load the cached PNG directly. Cache invalidates
when wallpaper path, size, mtime, or sigma changes.
Adds dirs crate for cache directory resolution.
Gaussian blur applied at texture load time when `background_blur` is
set in moonlock.toml. Refactored wallpaper loading from per-window
Picture::for_filename() to shared gdk::Texture pattern (matching
moonset/moongreet), avoiding redundant JPEG decoding on multi-monitor.
loginctl has no reboot/poweroff subcommands — these are systemctl
commands. The error was silently swallowed because stderr wasn't
captured and logs went to a non-existent directory.
Complete rewrite of the Wayland lockscreen from Python/PyGObject to
Rust/gtk4-rs for memory safety in security-critical PAM code and
consistency with the moonset/moongreet Rust ecosystem.
Modules: main, lockscreen, auth (PAM FFI), fingerprint (fprintd D-Bus),
config, i18n, users, power. 37 unit tests.
Security: PAM conversation callback with Zeroizing password, panic hook
that never unlocks, root check, ext-session-lock-v1 compositor policy,
absolute loginctl path, avatar symlink rejection.
