fix: security hardening, blur geometry, and performance audit fixes (v0.6.2)
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Security: cache dirs now 0o700 via DirBuilder::mode(), blur config validated (finite + clamp 0–200), TOCTOU socket pre-check removed. Quality: GPU blur geometry fixed (texture shifted instead of stretched), is_valid_username hardened, is_valid_gtk_theme extracted as testable fn, save_last_session error handling consistent with save_last_user. Performance: blurred texture cached across monitors (1x GPU renderpass instead of N), FingerprintProbe device proxy cached in GreeterState with generation counter to prevent race condition on fast user-switch. Clippy: all 7 warnings resolved (collapsible if-let, redundant closure, manual_range_contains, too_many_arguments suppressed for GTK widget fns). Tests: 109 → 118 (GTK theme validation, Unicode usernames, cache dir permissions, unwritable dir handling, blur config edge cases).
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@@ -45,8 +45,8 @@ cd pkg && makepkg -sf && sudo pacman -U moongreet-git-<version>-x86_64.pkg.tar.z
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- `power.rs` — Reboot/Shutdown via loginctl
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- `i18n.rs` — Locale-Erkennung (LANG / /etc/locale.conf) und String-Tabellen (DE/EN), alle UI- und Login-Fehlermeldungen
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- `fingerprint.rs` — fprintd D-Bus Probe (gio::DBusProxy) — Geräteerkennung und Enrollment-Check für UI-Feedback
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- `config.rs` — TOML-Config ([appearance] background, gtk-theme, fingerprint-enabled) + Wallpaper-Fallback
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- `greeter.rs` — GTK4 UI (Overlay-Layout), Login-Flow via greetd IPC (Multi-Stage-Auth für fprintd), Faillock-Warnung, Avatar-Cache, Last-User/Last-Session Persistence (0o600 Permissions)
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- `config.rs` — TOML-Config ([appearance] background, gtk-theme, fingerprint-enabled) + Wallpaper-Fallback + Blur-Validierung (finite, clamp 0–200)
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- `greeter.rs` — GTK4 UI (Overlay-Layout), Login-Flow via greetd IPC (Multi-Stage-Auth für fprintd), Faillock-Warnung, Avatar-Cache, Last-User/Last-Session Persistence (0o700 Dirs, 0o600 Files)
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- `main.rs` — Entry Point, GTK App, Layer Shell Setup, Multi-Monitor, systemd-journal-logger
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- `resources/style.css` — Catppuccin-inspiriertes Theme
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@@ -57,13 +57,13 @@ cd pkg && makepkg -sf && sudo pacman -U moongreet-git-<version>-x86_64.pkg.tar.z
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- **Async Login**: `glib::spawn_future_local` + `gio::spawn_blocking` statt raw Threads
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- **Socket-Cancellation**: `Arc<Mutex<Option<UnixStream>>>` + `AtomicBool` für saubere Abbrüche
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- **Avatar-Cache**: `HashMap<String, gdk::Texture>` in `Rc<RefCell<GreeterState>>`
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- **GPU-Blur via GskBlurNode**: `Snapshot::push_blur()` + `GskRenderer::render_texture()` im `connect_realize` Callback — kein CPU-Blur, kein Disk-Cache, kein `image`-Crate
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- **Fingerprint via greetd Multi-Stage PAM**: fprintd D-Bus nur als Probe (Gerät/Enrollment), eigentliche Verifizierung läuft über PAM im greetd-Auth-Loop. `auth_message_type: "secret"` → Passwort, alles andere → `None` (PAM entscheidet). 60s Socket-Timeout bei fprintd.
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- **GPU-Blur via GskBlurNode**: `Snapshot::push_blur()` + `GskRenderer::render_texture()` im `connect_realize` Callback — kein CPU-Blur, kein Disk-Cache, kein `image`-Crate. Blurred Texture wird per `Rc<RefCell<Option<gdk::Texture>>>` über alle Monitore gecacht (1x GPU-Renderpass statt N).
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- **Fingerprint via greetd Multi-Stage PAM**: fprintd D-Bus nur als Probe (Gerät/Enrollment), eigentliche Verifizierung läuft über PAM im greetd-Auth-Loop. `auth_message_type: "secret"` → Passwort, alles andere → `None` (PAM entscheidet). 60s Socket-Timeout bei fprintd. Device-Proxy in `GreeterState` gecacht, Generation-Counter gegen Race Conditions bei schnellem User-Switch.
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- **Symmetrie mit moonlock/moonset**: Gleiche Patterns (i18n, config, users, power, GResource, GPU-Blur)
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- **Session-Validierung**: Relative Pfade erlaubt (greetd löst PATH auf), nur `..`/Null-Bytes werden abgelehnt
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- **GTK-Theme-Validierung**: Nur alphanumerisch + `_-+.` erlaubt, verhindert Path-Traversal über Config
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- **Journal-Logging**: `systemd-journal-logger` statt File-Logging — `journalctl -t moongreet`, Debug-Level per `MOONGREET_DEBUG` Env-Var
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- **File Permissions**: Cache-Dateien 0o600
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- **File Permissions**: Cache-Verzeichnisse 0o700 via `DirBuilder::mode()`, Cache-Dateien 0o600
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- **Testbare Persistence**: `save_*_to`/`load_*_from` Varianten mit konfigurierbarem Pfad für Unit-Tests
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- **Shared Wallpaper Texture**: `gdk::Texture` wird einmal in `load_background_texture()` dekodiert und per Ref-Count an alle Fenster geteilt — vermeidet redundante JPEG-Dekodierung pro Monitor
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- **Wallpaper-Validierung**: GResource-Zweig via `resources_lookup_data()` + `from_bytes()` (kein Abort bei fehlendem Pfad), Dateigröße-Limit 50 MB, non-UTF-8-Pfade → `None`
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