Native app uses supabase.auth.signInWithPassword directly, bypassing
/api/auth/login. This authenticated endpoint runs the same device-lock
check post-auth: 409 DEVICE_LOCKED if bound to another user, 200+bind
if Pro/Legend user, no-op bind for Free users. CORS headers extended
to include x-device-name/model/os. 34 tests green.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Closes the bypass loophole where a Pro/Legend user could log out in a
craving moment, sign in with a fresh Free account on the same iPhone,
and watch the NEFilter blocklist shrink from 208k Casino domains to
the curated 30-domain stub. The user is the patient — the addiction
itself is the attacker.
When a Pro/Legend account signs in via x-device-id, the device is
bound to that user_id (UserDevice.boundToPlan = 'pro'|'legend' …).
A subsequent login attempt from a different account on the same
device returns 409 DEVICE_LOCKED. The original user gets a Resend
email naming the nickname only (no firstName / email leaked per
the anonymity rule) with a link to either confirm the foreign attempt
or release the device.
Release flow:
- POST /api/devices/:id/request-release schedules releaseAt = now + 24h
- POST /api/devices/:id/cancel-release reverts it
- a Nitro plugin cron sweeps both (24h-requested releases AND
30-day-idle auto-releases) hourly
Free -> Free swaps stay unrestricted so onboarding on a second-hand
iPhone keeps working. Free -> Pro upgrade binds going forward; a
Pro -> Free downgrade keeps the existing lock so the bypass vector
stays closed.
Lock check runs BEFORE Supabase auth in /api/auth/login to avoid
giving a timing oracle for account enumeration. The dummy-UUID filter
in findActiveDeviceLock is the trick: it queries "someone else's
lock" with a userId that can never match.
DSGVO: ON DELETE CASCADE on UserDevice means an Art-17 deletion of
the original user releases all their locks automatically (Hans-Mueller
hand-off noted in the migration SQL).
24 vitest cases cover bind / lock / request-release-24h /
cancel-release / 30-day-idle-release / email rate-limit (1 per 6h) /
DSGVO cascade / multi-device Legend.
Migration to deploy after push:
infisical run -- npx prisma migrate deploy --schema backend/prisma/schema.prisma
Frontend follow-up (separate task):
- Sign-In: handle 409 DEVICE_LOCKED with a dedicated error UI
- Settings/Devices page: "Release device" button + 24h countdown
- GET /api/devices to include boundToPlan + releaseRequestedAt
POST /api/devices/protected/handshake — server-to-server endpoint called by
the AdGuard log-watcher whenever a Mac with our DNS-profile makes a DoH query
with its dnsToken embedded in the path (/dns-query/<token>).
- Idempotent: pending → active on first hit, lastDnsQueryAt always updated
- Auth: shared secret via x-handshake-secret (Infisical: HANDSHAKE_SECRET,
must be set before enabling the watcher)
- Revoked tokens are silently ignored (no info leak to potential attackers)
- Realtime publication added so the native app auto-advances the AddMacSheet
flow when status flips (no "I've installed it" button needed anymore)
- Schema: lyraVoiceId stays, new os_version column on user_devices (Migration 20260515)
- registerDevice() merge-heuristic: if existing record matches userId + same name +
same model + lastSeen < 30 days, update existing instead of inserting new.
Fixes iOS IDFV-reset creating phantom devices on Recovery-Restore.
- register.post.ts: accepts osVersion in body, maps isCurrent in error-path payload
- New util testUser.ts: isTestUser(email) — explicit allowlist for charioanouar@gmail.com
plus existing @rebreak.internal suffix
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Backend:
- ProtectedDevice prisma model + migration add_protected_devices
- DB helpers: list/count/get/create/confirm/revoke
- mobileconfig.ts utility — XML-escape, unique UUIDs per request
- 5 endpoints under /api/devices/* (avoid /api/devices conflict with existing
Capacitor UserDevice route by using /api/devices/protected for list)
Phase 1: backend ready. DoH-server token-routing comes in phase 2.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
