* fix(bfld): route process_to_frame payload through PrivacyGate (ADR-141 privacy bypass)
BfldPipeline::process_to_frame stamped the frame header with the active
privacy class but serialized the caller-supplied BfldPayload UNCHANGED via
BfldFrame::from_payload. This let a frame labeled Anonymous(2) or
Restricted(3) carry the full identity-leaky compressed_angle_matrix
(+ amplitude/phase proxies, csi_delta) that PrivacyGate::demote is documented
and tested (privacy_gate_demote.rs) to strip at exactly those classes.
A NetworkSink accepts class >= Derived(1), so such a frame would publish the
beamforming angle matrix — the identity surface — across the node boundary
despite its restrictive class byte. The class byte lied about payload content.
Fix: after building the frame at the active class, apply PrivacyGate::demote to
the same class. demote() strips sections by target-class threshold (independent
of any class transition), so a same-class demote performs no class change but
brings the payload into policy compliance. Research classes (Raw/Derived) keep
the full payload — demote is a no-op there.
Pinned by three fails-on-old tests in pipeline_to_frame.rs:
- process_to_frame_at_anonymous_strips_identity_leaky_sections (FAILED pre-fix)
- process_to_frame_in_privacy_mode_strips_amplitude_and_phase (FAILED pre-fix)
- process_to_frame_at_derived_preserves_full_payload (guards against over-strip)
The pre-existing round-trip test is updated to assert the gated payload.
Co-Authored-By: claude-flow <ruv@ruv.net>
* fix(bfld): JSON-escape zone_id in MQTT state-topic payload
render_events emitted the zone_activity payload as format!("\"{zone}\"") with no
escaping, while ha_discovery.rs already escapes operator-controlled strings via
push_str_field. A zone name containing a double-quote or backslash therefore
produced malformed / injectable JSON on the state topic that Home Assistant
parses (e.g. zone `a"b` -> payload `"a"b"`).
Fix: add json_string_literal() mirroring ha_discovery's escaping (", \, \n, \r,
\t, control chars) and use it for the zone payload. Value-identical for normal
zone names (living_room etc.).
Pinned by zone_payload_escapes_json_metacharacters (FAILED pre-fix); the
existing zone_payload_is_json_string_with_quotes still passes unchanged.
Co-Authored-By: claude-flow <ruv@ruv.net>
* docs(adr-141): record bfld privacy+security review findings + CHANGELOG
Document the two fixed bugs (process_to_frame privacy-bypass; zone_id JSON
injection) and the dimensions confirmed clean (event-field gating, witness/hash
framing, fail-closed) in ADR-141, plus CHANGELOG [Unreleased] Security/Fixed
entries.
Co-Authored-By: claude-flow <ruv@ruv.net>
a369fbe66e