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identity

The household's person <-> BLE-identifier registry, from Phase 6 of the project plan. Solves two concrete problems in one design:

Multiple phones per person (the classic private/work phone situation).
MAC address spoofing/randomization, so registration can't be tricked or accidentally fed garbage by a phone's own privacy features.
People with no device at all (a grandmother without a smartphone, a one-off guest) — the system stays useful instead of just not knowing they exist.

Also backs the "who's home" and "register me" pieces of hosts/door-panel/ and hosts/kitchen-display/, and proxies the household weather topic those two dashboards both need.

The model

A person has zero or more identifiers. An identifier is a Home Assistant entity_id that resolves presence for one physical device. That's the entire schema (server.py's people/identifiers tables) — multi-phone support isn't a special case, it falls straight out of it: register once with your private phone, register again later with your work phone in hand, same spoken name, and you now have two identifiers under one person.

Anti-spoofing — the actual security boundary

A raw Bluetooth MAC address is never accepted as an identifier by itself, especially not a randomized one (the iOS/Android default — a phone's advertised MAC rotates every few minutes specifically so it can't be tracked as a stable identifier by anyone, including this system). Registration only ever looks at entity_ids matching TRUSTED_ENTITY_PREFIXES — meant to contain only:

Home Assistant's Private BLE Device integration entities (Bermuda/HA resolve the rotating MAC back to a stable identity via the device's IRK — a cryptographic resolution, not string-matching a MAC), or
manually provisioned fixed-MAC BLE tag entities (a physical tag handed to a person specifically because its MAC doesn't rotate).

An attacker broadcasting an arbitrary spoofed MAC never produces a trusted candidate — it just doesn't show up in TRUSTED_ENTITY_PREFIXES at all, because the untrusted raw entity is a different entity_id than the resolved one. Spoofing a specific person's resolved identity would require their device's actual IRK secret, a materially higher bar than MAC spoofing. This is a defense against passive/ opportunistic spoofing, not a claim of cryptographic non-repudiation — if a household member's phone (and its IRK) is itself compromised, this system has no way to know that. Threat-model it as "keeps a stranger's phone from registering itself as you," not "biometric-grade proof of identity."

Never auto-commit on ambiguity

If a registration attempt finds zero, more than one, or an already-claimed candidate, nothing is written. The caller gets a reason back (and, for the ambiguous case, the candidate list) and a human disambiguates on the touchscreen — calling POST /register again with an explicit entity_id. The one case that does commit within a single call is the clean one (exactly one trusted, unclaimed candidate) — because the spoken "register me as <name>" command is the human confirmation; requiring a second round-trip for the unambiguous case would be pure friction with no safety benefit. This mirrors, rather than weakens, this project's existing "an identity merge must never auto-commit silently" rule: ambiguity is exactly the case that still needs a person.

The photo is an audit trail, not face recognition

POST /register/photo stores whatever the calling kiosk's camera captured at registration time, purely as a "who did this, when" reference photo — it is never run through any face-matching or biometric pipeline. Building that would mean either standing up a new ML pipeline from scratch or wiring this device's camera into Frigate's existing face recognition (Phase 5) as a second camera source — both real, both out of scope for this pass. BLE/IRK resolution, not the camera, is what actually decides who's registering. If you want camera-based identity later, Frigate's own face-recognition + enrollment (0.16+) is the piece to wire in, not a new pipeline here.

People without a device

Two paths, distinct on purpose because they solve different problems:

A known person with no device (the grandmother case) — POST /register with "no_device": true and a real name. Skips candidate lookup entirely; creates the person (or reuses them by name, same dedup as the normal path) with zero identifiers. On the touchscreen this is the "I don't have a phone or tag" checkbox next to the name field; there's no voice phrasing for it yet (a boolean flag doesn't fit the single-utterance design cleanly — say it on the touchscreen for now). The long-term fix for this exact case is a physical fixed-address BLE tag (docs/components.md's "Fixed BLE tags" line) so they do get automatic presence eventually — this flag is what makes the household not have to wait for that before the person exists in the system at all.
Someone the system doesn't need to identify (a one-off guest) — POST /register/guest, no name, no device. Always creates a new record ("Guest 1", "Guest 2", ...; never reused/deduped, unlike named people) — the touchscreen's "Add a guest" button. DELETE /people/<id> cleans up a stale one afterwards.

Neither path can ever resolve automatic presence (there's no identifier to check a state on) — that's what POST /presence/manual ({"person_id", "home"}) is for: a hand-operated Home/Away toggle, surfaced directly on hosts/door-panel/'s dashboard next to anyone with has_device: false in /presence's response. Until it's tapped at least once, /presence reports home: null ("unknown") for that person — never false, since defaulting a device-less person to "away" would be actively wrong the moment they're actually sitting in the next room, not just uninformative.

Floor-plan groundwork (not the floor plan itself)

/presence also reports a best-effort room per person (server.py's AREA_ATTRIBUTE, default area_id) — read from whichever HA area/room attribute your room-presence integration (Bermuda) attaches to a trusted entity's state, so a future floor-plan UI has live room-level data to plot without this service changing again. The floor plan itself — an image, a room<->coordinate mapping, any rendering — is deliberately not built here. There's no floor plan or fixed room list to design a coordinate format against yet; building one now would be guessing, not engineering. AREA_ATTRIBUTE's exact name is also a guess — verify it against a real Bermuda-tracked entity's attributes (Developer Tools -> States) before relying on room being populated at all; it degrades to null if missing, never breaks the response.

Voice: single-utterance, not multi-turn

The whole flow is designed around one spoken sentence: "register me as <name>" — not a multi-turn conversation ("what's your name?" / reply / "confirm?"). This is deliberate: HA Assist's multi-turn/continue-conversation support is newer and more version-sensitive than a single custom-sentence intent with a captured {name} slot, and a one-shot command is materially more robust to build against. The tradeoff is explicit up front: say your name in the same breath as the command, or use the touchscreen's own form instead.

Nothing under this repo builds the HA-side wiring — same convention as digest-engine's/admin-canvas's HA integration points. You need, in Home Assistant's own config:

# configuration.yaml (excerpt) — a custom sentence + intent script that calls this
# service's /register endpoint. VERIFY against your own HA version; this is a worked
# example, not a tested one.
intent_script:
  RegisterPerson:
    speech:
      text: "{{ message }}"
    action:
      - service: rest_command.identity_register
        data:
          name: "{{ name }}"
          device_id: "{{ trigger.device_id | default('unknown') }}"
        response_variable: reg_result
      - variables:
          message: "{{ reg_result.content.message }}"

rest_command:
  identity_register:
    url: "http://<container-host>:8097/register"
    method: POST
    headers:
      Authorization: "Bearer !secret identity_token"
      Content-Type: "application/json"
    payload: '{"name": "{{ name }}", "device_id": "{{ device_id }}"}'

Plus a custom sentence file (custom_sentences/en/register.yaml) mapping "register me as {name}" to the RegisterPerson intent — see HA's custom sentences docs. The same IDENTITY_TOKEN from identity.env has to be pasted into HA's secrets.yaml by hand; there's no way for this repo to push it there for you.

Configure

cp identity/identity.env.example /opt/smart-home/identity/identity.env
openssl rand -hex 32   # IDENTITY_TOKEN
chmod 600 /opt/smart-home/identity/identity.env
$EDITOR /opt/smart-home/identity/identity.env

Two things that must be filled in with real values before this does anything useful:

HA_TOKEN — a Long-Lived Access Token from HA's own UI (profile -> Security).
TRUSTED_ENTITY_PREFIXES — the actual entity_id prefixes your Private BLE Device / fixed-tag setup produces. The shipped default (device_tracker.pble_,device_tracker.bletag_) is a plausible guess, not confirmed against a real HA instance — check Developer Tools -> States yourself.

API

All endpoints are bearer-token gated (Authorization: Bearer <IDENTITY_TOKEN>), including the GETs — same reasoning as pantry-vision: this service has a published port because kiosk browsers call it directly, so the token is the actual boundary, not network placement.

Endpoint	What it does
`POST /register/photo`	raw image bytes -> `{"photo_id": "..."}` — an audit artifact, and also becomes the person's profile picture (see below)
`POST /register`	`{"name", "device_id", "photo_id"?, "entity_id"?, "no_device"?}` -> registers, or returns a reason it couldn't (see above)
`POST /register/guest`	`{"device_id", "photo_id"?}` -> registers "Guest N", no name needed
`GET /people`	admin/audit list of every registered person + their identifiers + `has_photo`
`GET /people/<id>/photo`	the person's profile picture (raw JPEG) — their most recent registration photo
`DELETE /people/<id>/identifiers/<id>`	revoke a mistaken or compromised identifier
`DELETE /people/<id>`	remove a person entirely (their identifiers go with them) — mainly for cleaning up stale Guest records
`POST /presence/manual`	`{"person_id", "home"}` — hand-operated Home/Away for anyone with no identifiers
`GET /presence`	`{"people": [{"id", "name", "home", "room", "has_device", "has_photo"}], "generated_at"}` — `home` is `true`/`false`/`null` (unknown), `room` is best-effort floor-plan groundwork (see below)
`GET /weather`	proxies `smarthome/weather/current`, same JSON shape (`temperature`/`condition`/`location`) `hosts/thin-client`'s weather overlay already uses

Every person gets a profile picture, automatically — whichever registration photo was captured most recently for them (_set_profile_photo() in server.py), no separate upload step. A device-less registration or a flaky camera just means no photo yet, not a missing feature — both frontends fall back to a plain circular placeholder (👤) until one exists. Fetched via GET /people/<id>/photo with a blob

createObjectURL() on the frontend side, not a bare <img src="..."> — the endpoint is bearer-token gated like everything else here, and a plain <img> tag has no way to send an Authorization header.

Manual verification still outstanding

TRUSTED_ENTITY_PREFIXES' defaults are guessed, not confirmed against a real Private BLE Device / Bermuda setup — the single biggest thing to check before trusting registration at all.
The worked intent_script/rest_command/custom-sentence YAML above is written against HA's documented shape, not tested against a running HA instance.
PRESENT_STATES = {"home"} assumes Private BLE Device's device_tracker entities use the standard home/not_home vocabulary — check yours actually does.
The >1 candidate (ambiguous) and already_claimed (conflict) paths are logically covered but never exercised against two real phones in the same room.
Multi-device dedup relies on exact-name case-insensitive matching (WHERE name = ? COLLATE NOCASE) — two different people who happen to share a first name would collide into one record. Register with full names if that's a real risk in your household; nothing here disambiguates same-name people.
SQLite at /data/identity.db has no backup wiring yet — if ENABLE_BACKUPS is on in setup-container-host.sh, confirm /opt/smart-home/identity is actually covered by whatever paths restic is pointed at (photos under /data/photos too — losing them just loses profile pictures, not the person records themselves, but still worth covering).
AREA_ATTRIBUTE's default (area_id) is a guess at what Bermuda actually attaches to a trusted entity's state — unconfirmed, and the whole room field in /presence degrades to null silently if it's wrong, so this could easily go unnoticed until someone builds the actual floor-plan UI and finds it empty.
The blob+createObjectURL() profile-picture fetch (both frontends) has not been checked for a memory leak from never calling URL.revokeObjectURL() on the old blob URL when /people//presence refreshes and re-fetches the same photo — likely fine at household scale and dashboard.js's 60s poll cadence, not measured over a multi-day uptime.

14 KiB Raw Blame History