Phase 6 WebAuthn bind, enrollment-only slice (spec section 14), web app face.
An already-authenticated principal binds a passkey to their own account and
manages the credentials they have bound; email-OTP stays the fallback factor.
- four account routes: POST register/begin mints a credential-creation
challenge, POST register/finish verifies the attestation against the
server-stashed SessionData and binds the credential, GET/DELETE credentials
list and unbind the caller's OWN passkeys. App-tier, principal-scoped (the
body never names a user).
- PasskeyVerifier seam keeps go-webauthn out of this package: ceremony state
crosses as opaque bytes, attestation as an io.Reader, result as a plain
VerifiedCredential. A nil verifier makes begin/finish report 503 so the
authenticated boundary is exercised before the real verifier is wired in.
- the view never leaks the public key; credential_id collisions map to 409.
- OpenAPI: the four paths plus the PasskeyCredential schema, keeping the
served-routes parity gate green.
Scope: ENROLLMENT only. The passkey login/assertion path (proving a passkey
from an unauthenticated state) is deferred; every ceremony here rides on a
known principal.
Tests: handler + challenge state machine against a fake repo and a fake
verifier (no real attestation crypto, no SQL). The decisive assertion is the
session-data round-trip -- the finish body carries no challenge, so the only
path for the stashed blob into FinishRegistration is store-stash then consume,
proving the challenge is server-held and never client-echoed. Also covers
supersede-on-begin, single-use, expiry, 503-unavailable, 409-already-bound,
owner-scoped list/delete, and external-only face separation.
Add docs/troubleshooting.md covering the common failure modes the spec
implies, grounded in the actual control-plane code paths:
- Stuck Starting (PodNotReady / RconSecretUnavailable / RconNotReachable)
and the deliberate absence of a Starting->Failed timeout.
- Failed reachable only via InvalidSpec on a malformed spec.storage.size,
plus the stale status.endpoint=direct caveat after a failure.
- Routing via status.endpoint direct/fallback and the empty fallbackServer
pitfall; wake 403/429/503 gate order.
- online-mode coupling and Velocity's offline-mode routing refusal.
- Cloudflare Access 401/403, nil-Keyfunc fail-closed, audience checks,
the absence of an issuer check, and local-session gating.
- Internal service-token (FELIS_SERVICE_TOKEN) rejection path.
- link/claim error codes, Kaniko build denials (SA-by-absence RBAC,
default-deny egress, internal-registry push gate), and the registry
DNS contract.
- Reaper backup-before-delete invariant and false-delete vectors.
- Unimplemented idle auto-stop, permanently-zero players.online, the
inert CRD fields, and the always-survives world PVC behaviour.
Each item is labelled with its evidence grade (GO-TESTED / CODE-ONLY /
INTEGRATION-ONLY / INERT) so operators know what is verified versus
asserted.
Adversarial cross-check of the three §28 diagrams against the wake, claim
and link code paths surfaced two fidelity drifts:
- The wake/status/join-event lanes used abbreviated /internal/... paths;
the registered internal-face routes carry the /api/v1 prefix (api.go),
matching the convention the claim and link diagrams already use.
- The /link diagram showed the game posting {mc_uuid, auth_source}, but no
shipped in-game caller sends auth_source — LinkClient posts {mc_uuid}
and the API defaults auth_source to mojang server-side.
The claim diagram already matched the code (verbatim atomic UPDATE,
404/409/200 mapping) and is unchanged.
QR scan-to-login is a device-code grant where the QR encodes the existing
short-lived account-link code (spec §B3 player game-login). velocity mints a
code in-game, renders it as a QR, the player scans it on a phone already signed
in to the panel, and that web session's verify writes the durable account_links
row bound to that user. The only new verifiable surface that flow needs is the
completion poll velocity calls to learn the link landed and admit the player.
Add GET /api/v1/internal/account/link/status/{mc_uuid}: a read-only, internal
handleLinkStatus keyed by the verified mc_uuid velocity already holds. It reuses
the existing UserByMCUUID, so it adds no migration and no mutation to the
load-bearing VerifyLinkCode; ErrNotFound maps to {linked:false} (pending /
not-yet-scanned), a hit to {linked:true, user_id}. Keying on the public UUID and
not the scanned code means the read carries no guessing surface and needs no
attempt cap — the internal face already gates it to service callers, and the poll
consumes nothing so a velocity restart re-polls safely.
QR render, limbo collision routing, in-game admit, and the reclaim
inherit-disambiguation stay CODE-ONLY (Java/Velocity) and are labeled as such;
this endpoint reports link completion only.
Document the route in openapi.yaml (x-felis-face internal, x-felis-tier service)
so the parity gate holds, and cover it with a hermetic vertical that proves the
poll reflects the durable link only after the external verify and binds the
verifier's id, plus unknown-uuid, idempotency, and internal-only face separation.
When the configured third-party Yggdrasil and the official Mojang service
issue the same username under different UUIDs, the non-genuine squatter is
displaced in favour of the real Mojang owner (正版优先). This adds the
Go-verifiable data layer of that flow on the internal (velocity) face.
- migration 0006: username_blacklist (barred squatter UUIDs) and
player_data_holds (the displaced account's 30-day data stash), both keyed
by mc_uuid so the genuine Mojang player — identical username, different
UUID — is never caught by the bar.
- POST /api/v1/internal/player/reclaim bars the squatter UUID and stashes
its data in one transaction (all-or-nothing). It is idempotent on a
retried callback and returns the hold's effective expiry — the first
reclaim's window, never a fresh now()+30d — so the rejected player is told
the truth about how long their data is kept.
- GET /api/v1/internal/player/blacklist/{mc_uuid} is the login-gate check
velocity calls to reject a barred squatter before admitting them.
Scope: velocity collision-routing, the limbo prompt, the authlib
dual-backend and the data-inherit flow are code-only (Java plus a QR-bound
device session a row cannot express) and are not part of this slice. Unit
tests cover the handlers and the in-memory repo contract; the Postgres SQL
path is exercised by integration only.
Capture which Yggdrasil authenticated an in-game UUID when a link code is
minted (spec §10 dual-Yggdrasil) and copy it onto the durable account_links
row at verify. The value originates in-game — the web verify side never sees
the authentication — so it threads through account_link_codes, mirroring how
mc_uuid (not user_id) lives on a code.
- migration 0005: add link_auth_source enum + auth_source column on both
account_link_codes and account_links; DEFAULT 'mojang' backfills existing
rows and sets the Mojang-priority default for a mint that omits the field
- mint validates an explicit auth_source (unknown value -> 400); verify
surfaces it in the 200 body and refreshes it on idempotent re-verify
Forced web onboarding proves a player controls an email before it is
bound to their account. POST /api/v1/account/email/start mints a random
6-digit code, mails it (or logs it server-side when no Mailer is wired —
the demo has no SMTP), and POST /api/v1/account/email/verify redeems it,
flipping users.email_verified in the same transaction that consumes the
code.
Brute force is bounded two ways: a 10-minute TTL and a 5-attempt cap,
both enforced in the repo so the fake and Postgres agree. Only the
sha-256 of the code is stored; the digits live only in the email. Both
routes are app-tier external — verifying your own email is scoped to the
principal, never names another user.
Add username+password login for Owner/Operator staff accounts on
op.console, the primary web login when Zero Trust is not in front of the
API. Three handlers form the whole surface: login mints a server-side
session cookie, logout revokes it idempotently, and change-password
re-verifies the current password before rotating the hash and clearing
must_change_password.
- Session cookies are HttpOnly+Secure+SameSite=Lax, host-only, stored
server-side as a SHA-256 hash with a 12h TTL.
- Login is anti-enumeration: every failure runs a uniform bcrypt compare
against a dummy hash and returns the same vague error.
- Credential-bearing writes require Content-Type: application/json,
returning 415 otherwise, to close the cross-site form-POST forgery
vector as a belt to the SameSite cookie.
- Local auth fails closed: login is rejected unless local_auth_enabled
is set, so a Zero-Trust-only deployment never accepts a local password.
- Extend the users table with a nullable password_hash and
must_change_password; staff are role=admin rows with a hash, players
are role=user rows with hash NULL.
- /me now reports must_change_password so the panel can force a
first-login change.
Covered by Go unit tests (handlers, content-type guard, anti-enumeration,
forced-change lockdown) and the OpenAPI route-parity gate.
Machine-readable contract for the felis-api faces. The parity test (internal/api/openapi_test.go) checks every served route against this document's x-felis-face and x-felis-tier, so served and documented routes cannot drift.
Lemon-miaow
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