Add POST /auth/register: creates a non-superuser then auto-logs in,
returning the same TokenResponse as login. Gated by the new
allow_registration setting (env ALLOW_REGISTRATION, default true);
when disabled it raises PermissionDeniedError (403). Accounts remain
admin-only for superusers.
Tests cover create+login, duplicate (409), short password (422), and
the disabled (403) path.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Subsonic auth (t=md5(password+salt), legacy p=) needs a recoverable secret,
but login passwords are stored as a one-way argon2 hash. Add a separate,
per-user app-password: high-entropy, random, and encrypted at rest with a
Fernet key derived from SUBSONIC_SECRET_KEY (never stored in the DB).
- SubsonicPasswordCipher + generate_subsonic_password in core.security
- users.subsonic_password_enc column (+ Alembic migration), repo + port methods
- SubsonicAuthService: verify (t+s / p / p=enc:) and rotate/reveal lifecycle
- self-service GET/POST /users/me/subsonic-password + admin rotate endpoint
- domain SubsonicCredentials + SubsonicCipher port; deps wiring
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Senko-san
olly