* feat(dashboard-auth): extend RFC 8252 native sign-in to password providers
The desktop app runs password sign-in for gated gateways in an embedded
Electron BrowserWindow, where OS password managers (macOS Passwords /
iCloud Keychain autofill) cannot reach the form — Chromium-in-Electron
has no bridge to them, so users retype credentials by hand even though
the /login form already carries the right autocomplete attributes.
The existing RFC 8252 native flow (system browser + loopback + PKCE)
solves exactly this for OAuth providers, but was explicitly disabled for
password providers on the grounds that they have "no IDP round trip to
broker". The brokering is still worth having: it moves the credential
form into the system browser, where password-manager autofill just works.
Gateway-only change; the desktop needs no changes (runNativeLogin is
already page-agnostic), and older desktop builds pick the capability up
automatically once the gateway advertises it:
* /auth/native/authorize now accepts a supports_password provider:
register the pending broker authorization as usual, then 302 the
system browser to the interactive /login form with the opaque
broker_state in the gateway's PKCE cookie (the same server-controlled
channel the OAuth branch uses) instead of an IDP redirect.
* /auth/password-login: when the server-set PKCE cookie carries a
broker handle, a successful credential check completes the pending
authorization exactly like the /auth/callback native branch — mint
the one-time loopback code, return the loopback redirect (validated
loopback-only at authorize time) as `next`, clear the PKCE cookie,
and set NO session cookies. A lapsed broker is a clean 400 telling
the user to restart sign-in; a failed credential attempt leaves the
pending entry intact so the user can retype.
* /api/status now advertises "native_pkce" whenever any interactive
session provider is registered (previously only for non-password
providers), so the desktop selects the system-browser strategy for
password-only gateways.
Security posture is unchanged from the existing flow: loopback-literal
redirect_uri enforcement, PKCE S256 binding, single-use short-TTL codes,
constant-time comparison, and the same rate limiter on password attempts.
Tests: full authorize → /login → password-login → loopback → token →
bearer round trip, wrong-password keeps the pending entry, lapsed broker
→ 400, no-broker browser login keeps minting cookies, and the /api/status
advertisement for password-only gateways.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
* fix(dashboard-auth): bind native password completion to the authorize-time provider
Review follow-ups for #75808:
* /auth/password-login now enforces that body.provider matches the
provider recorded in the server-set PKCE cookie by
/auth/native/authorize before completing a pending native
authorization. /login renders a form for every session provider, so
without this a native flow started for provider A could be completed
with provider B's credentials, binding B's session into A's pending
entry. The mismatch is rejected BEFORE credential verification (no
session minted, no oracle) and preserves both the pending entry and
the cookie, so the user can still submit the correct provider's form.
Covered by a two-password-provider E2E regression test.
* Update the two docs spots that still said password-only providers do
not advertise native_pkce (website desktop-native-signin guide and the
auth_flows type comment in web/src/lib/api.ts).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
* chore: map contributor email for #75808 (buffpesos)
---------
Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
Co-authored-by: Brooklyn Nicholson <brooklyn.bb.nicholson@gmail.com>
Two tightenings on /auth/native/authorize (a public pre-auth route):
- Per-IP pending cap (8): the broker store is capacity-bounded fail-closed
at 256 entries with a 600s TTL, so one unauthenticated spammer could fill
it and deny native sign-in gateway-wide for the pending window. Pending
entries now record the requester IP and each address is capped well above
any legitimate concurrent-login count; other addresses keep signing in.
- Loopback redirect_uri accepts IP literals only (127.0.0.1 / ::1):
'localhost' can be re-pointed via the hosts file or a hostile resolver
(RFC 8252 \u00a78.3 says to use loopback IP literals); the desktop always
sends 127.0.0.1, so nothing legitimate used the name.
3 new tests: per-IP cap enforced, cap frees on TTL expiry, localhost
redirect rejected at the route.
The Desktop app can now sign in to a gated gateway using the user's SYSTEM
browser and OAuth 2.0 for Native Apps (RFC 8252) instead of an embedded
Electron BrowserWindow, and authenticates with bearer tokens it holds itself
instead of relying on HttpOnly browser session cookies.
Why brokered: the upstream IDP (Nous Portal) binds client_id to the gateway
instance and only permits redirect_uris on the gateway's own origin, so a
desktop loopback redirect can't be a direct Portal client. The gateway
therefore acts as the authorization server TO the desktop and an OAuth client
TO the Portal, reusing the existing PKCE start_login/complete_login provider
path unchanged.
Server (Ben's dashboard-auth lane):
- native_flow.py: in-memory broker — binds the desktop's PKCE challenge to a
completed Session, mints a single-use, short-TTL, PKCE-verified gateway
authorization code. Constant-time compare, single-use (consumed before the
PKCE check so a wrong verifier can't be retried), capacity-bounded.
- routes.py: GET /auth/native/authorize (starts the brokered PKCE login,
loopback-only redirect_uri, S256-only), POST /auth/native/token (loopback
code + verifier -> tokens in the JSON body, never Set-Cookie), POST
/auth/native/refresh (desktop-held RT rotation). /auth/callback branches to
mint a loopback code + 302 to 127.0.0.1 when a broker_state rides the PKCE
cookie; the cookie/SPA path is untouched.
- middleware.py: the gate accepts Authorization: Bearer <access_token>,
verified via the same verify_session provider stack (no cookie set/read),
with the same "provider unreachable -> 503, not logout" semantics.
- web_server.py /api/status: advertise auth_flows (["cookie","native_pkce"])
so clients can detect the capability; native_pkce only when a brokerable
OAuth provider is registered.
Desktop (Ben's lane):
- native-oauth.ts: pure PKCE/capability/URL/callback/token helpers.
- native-oauth-login.ts: loopback-listener orchestration (system browser via
openExternal, ephemeral 127.0.0.1 listener, state/PKCE verification), all
I/O injected for testability.
- main.ts: capability-gated oauth-login IPC — native flow when advertised,
automatic fallback to the existing embedded-webview cookie flow otherwise;
tokens stored encrypted (safeStorage/OS keychain), REST + ws-ticket
authenticated by bearer, transparent refresh, logout clears both shapes.
Tests: 18 server pytest (broker unit + full authorize->callback->token E2E +
cookieless bearer auth of a gated route + ws-ticket mint + capability
advertisement + refresh); desktop node --test/vitest for both pure modules
(PKCE, capability detection, callback CSRF, loopback round trip, timeout,
browser-open failure). Electron project typechecks clean.
Docs: website/docs/guides/desktop-native-signin.md.
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