Passkeys bind to the exact scheme://host:port the browser used, so a single
configured origin fails "Error validating origin" when reached via a different
form (e.g. :9500 direct vs a 443 proxy). Split FLEET_MGR_RP_ORIGIN on commas so
several exact origins can be allowed. Single-value config is unchanged.
The human->UI hop now authenticates with a hardware passkey (YubiKey), not an
mTLS client cert: phishing-resistant, origin-bound, better UX. (manager->broker
stays mTLS — service-to-service.)
- webauthn.go: credential store (registered admins + passkeys + a one-time-token
jti replay ledger; JSON file, atomic writes) + the webauthn.User impl + RP setup.
- cli.go: 'fleet-manager register-admin <name>' mints a short-lived HMAC-signed
enrolment link over a shared enrol key; the browser completes the WebAuthn
create ceremony. No anyone-can-register endpoint; single-use via the ledger.
- authapi.go: register/login ceremonies (usernameless discoverable login,
userVerification required) + logout + whoami; short-lived in-memory ceremony
store between begin/finish.
- session.go: opaque server-side sessions (Secure/HttpOnly/SameSite=Strict cookie)
+ requireSession middleware gating /api/*, with a CSRF header check on mutations.
adminName now comes from the session (audit attribution).
- main.go: register-admin subcommand dispatch; admin TLS switched to SERVER-AUTH
(no client cert) with a HOT-RELOADING cert (certReloader) so a Let's Encrypt
DNS-01 renewal is picked up without a restart. RP = diskless-server.bitasylum.org.
/api/* mounted behind requireSession; /auth/* + /healthz public.
Cert strategy (per design decision): the UI HTTPS cert is a publicly-trusted LE
cert via DNS-01 (mgmt-network UI isn't internet-reachable, so HTTP-01/TLS-ALPN-01
can't validate; DNS-01 proves control of bitasylum.org via TXT + supports
wildcards). External ACME client issues+renews to the cert path; manager reloads.
Deps: github.com/go-webauthn/webauthn (server-side). Tests: enrol-token
mint/verify/tamper/expiry, session middleware (401/403/CSRF/expiry), cred-store
persistence + jti ledger. build/test/vet/gofmt clean. Live passkey ceremony
(virtual authenticator / real YubiKey) is a bench item.
Audiobuzz