Re-prompt master password or OTP at POST /webauthn, matching the sibling 2FA WebAuthn activation path.
Bind registration and PRF-update ceremonies to random challenge tokens, consume saved challenge rows atomically, and add the authenticated assertion-options/update endpoints for completing PRF unlock setup.
Persist complete PRF unlock keysets with a dedicated column-scoped update helper.
Mirror password-login 2FA policy handling for passkey login: enforce RequireTwoFactor revocation when no providers exist, and reject accounts whose TwoFactor rows are all disabled or unusable.
- Wire key rotation to re-encrypt each passkey's PRF keys, with a superset check in validate_keydata so a passkey can't be left stale.
- Persist signature-counter updates and rotated PRF keys with column-scoped writes, avoiding a broad full-row credential update.
- Compute prfStatus as the full WebAuthnPrfStatus instead of a 1/0 placeholder.
- Move the login challenge from an in-memory cache to a DB-backed table with a scheduled cleanup job.
- Use webauthn-rs's discoverable-credential API instead of the JSON state-injection workaround.
- Make challenge consumption single-use, rate-limit assertion-options, and return a single generic auth-failure message.
- Honor SSO_ONLY at every passkey entry point: login grant, enrollment, refresh, and the unauthenticated assertion-options challenge.
- Migrations: real MySQL foreign key and indexes.
- Add prfStatus unit tests; codebase-consistency pass.
Zaid Marji
Sammy ETUR