Lands plan tasks 2.10 (pam_u2f line format parser via CredEntry::from_line/
to_line, credId extraction), 2.11 (CredentialsStore add/remove/list with
idempotent add-by-credId), and 2.12 (CredsPathResolver dispatching central vs
per-user paths). Bundled because the three pieces compose into one storage
boundary.
CredEntry treats post-username chunks as opaque blobs split on ':', preserving
pam_u2f's full record on round-trip. credId = first comma-separated field of a
blob. add() is idempotent on credId match (Phase 3 may decide to refresh
publicKey on re-enroll; out of scope here).
Path resolution: Central -> Storage.central_path verbatim. PerUser -> getpwnam
via nix, with a /home/<user>/... fallback if NSS errors (CI users, distro
quirks); pam_u2f does the real lookup at auth time, so the fallback only
matters for write-on-enroll where the user does exist.
7 tests added; clippy + fmt clean.
Lands plan tasks 2.6 (PolicyStore wraps load_from_dir / save_local), 2.7
(PolicyChanged D-Bus signal on the AuthForge interface), and 2.8 (notify-based
inotify watcher in main.rs that emits the signal on any change in the policy.d
directory). Bundled because watcher → emit signal → wraps PolicyStore is one
data flow.
- daemon/src/storage/{mod,policy}.rs — PolicyStore::{load,save,watch}; watch
returns a (RecommendedWatcher, watch::Receiver) so the caller keeps the
watcher alive.
- daemon/src/dbus.rs — adds #[zbus(signal)] policy_changed; integration test
via p2p connection asserts the signal arrives within 2s.
- daemon/src/main.rs — spawns a task that ticks PolicyChanged on every
rx.changed(), keyed off AUTHFORGE_POLICY_DIR env var (default
/etc/authforge/policy.d). Watcher leaked via std::mem::forget; daemon
lifetime = process lifetime.
Test count: 17/17 daemon (was 14) + 13/13 common.
