screentinker/server/routes
ScreenTinker 252854d31e SSO: one OIDC flow for every provider, and verify the token properly
The OAuth support that was here could not work and would not have been safe if
it had.

It could not work: the login page called google.accounts.oauth2 and
new msal.PublicClientApplication, and NEITHER SDK WAS EVER LOADED by any page
in this app — no script tag, no dynamic import, nothing. Both buttons threw
ReferenceError on click. Even had they loaded, the CSP allows scripts only from
'self' and cloudflareinsights, and frames only from self and YouTube, so the
libraries and their popups were blocked too.

It would not have been safe: both endpoints authenticated with an ACCESS token
and neither checked who it was issued for. POST /auth/google fell back to
tokeninfo?access_token= and read the email out of the reply; POST
/auth/microsoft handed the bearer token to Graph /me and trusted that. Graph
and tokeninfo will both describe the user behind a token minted for SOMEBODY
ELSE'S application, so any site a user signed into that requested `email` or
`User.Read` could have replayed their token here and been issued a session as
them. Both endpoints are deleted; nothing is lost, because nothing could reach
them.

Replaced by ONE generic flow — Authorization Code + PKCE (S256), run
server-side, with the provider list resolved through a single function so
per-organization SSO can extend it later without a second login path. Google
and Microsoft become ordinary configured providers; Okta, Keycloak, Authentik,
Auth0 and anything else that speaks OIDC now work with three env vars.

Because the exchange happens server-side the browser never talks to the
provider, so there is no SDK to load, no client id in the page, and no
third-party origin needed in the CSP.

Identity comes from an ID token that must survive: signature against the
provider's JWKS (asymmetric algorithms only — alg:none and HMAC are refused
outright, the latter because the only key we hold is public), `iss` exactly as
discovered, `aud` and `azp` matching our client, `exp`, and a `nonce` this
server minted for that login. State is compared in constant time against a
value in an httpOnly SameSite=Lax cookie, so the callback is CSRF-protected and
survives a restart mid-login.

Account rules are the ones already in place: a verified email is required, an
SSO login never takes over an account that has a password, and a changed `sub`
for a known address is refused rather than handing the account to a recycled
mailbox.

18 new tests, every one describing something the old code would have accepted:
cross-audience tokens, azp mismatch, replayed nonces, alg:none, HMAC forgery,
wrong signing key, expired tokens, a discovery document lying about its issuer,
and a registry that never leaks a client id or secret to the browser.

Verified end to end against Google's real discovery document: the redirect
carries response_type=code, PKCE S256, state and nonce, and every callback
guard rejects as intended (no cookie, wrong state, no code, provider refusal,
unknown provider).

⚠️ TOTP is still not prompted on an SSO login, matching the documented
behaviour of the previous SSO and API-token paths. That is a product decision
and is left unchanged here rather than altered silently.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Bvjey4FNam49MN7ybjcq6A
2026-08-10 17:19:28 -05:00
..
activity.js Phase 2.1: tenancy middleware, permission helpers, JWT workspace context, frontend + backend role-rename compat 2026-05-11 20:02:00 -05:00
admin.js Show every plan on the admin tab, with who is on each 2026-07-29 19:36:10 -05:00
agency.js Default a video playlist item to the clip's own length (#237) 2026-08-06 09:36:53 -05:00
ai.js feat(ai): separate optional image API key (#41) 2026-06-09 13:47:47 -05:00
assignments.js Default a video playlist item to the clip's own length (#237) 2026-08-06 09:36:53 -05:00
auth.js SSO: one OIDC flow for every provider, and verify the token properly 2026-08-10 17:19:28 -05:00
billing.js feat(#146): billing:read scoped token — dual-path auth for the Usage Report (Option C) 2026-07-01 21:16:21 -05:00
contact.js fix(landing): replace broken Custom pricing card with enterprise contact form 2026-05-14 13:52:24 -05:00
content.js QA: close four ways a control or an asset lied about itself 2026-08-06 16:12:29 -05:00
device-groups.js Default a video playlist item to the clip's own length (#237) 2026-08-06 09:36:53 -05:00
devices.js BrightSign: report IPv6, the attached display and the active video mode 2026-08-10 15:30:40 -05:00
folders.js Phase 2.2c: content_folders gets workspace_id (schema + backfill); folders.js scoped; content.js folder-move strict same-workspace 2026-05-11 21:04:03 -05:00
kiosk.js Validate kiosk style values as CSS rather than as HTML 2026-07-27 22:28:47 -05:00
layouts.js Save a layout by diffing its zones, not by deleting and re-inserting them 2026-07-30 20:51:28 -05:00
media.js feat: transition engine — GL wipes across web, Tizen & Android (+ image↔video) (#204) 2026-07-20 16:45:32 -05:00
pip.js Hold overlay pushes to the same write check as every other fleet action 2026-07-30 20:46:03 -05:00
player-debug.js Add player debug overlay and server-side error telemetry sink 2026-05-15 15:20:42 -05:00
playlists.js Default a video playlist item to the clip's own length (#237) 2026-08-06 09:36:53 -05:00
provisioning.js fix(api): consolidate device pairing to /pair, remove vestigial bare endpoint (#90) 2026-06-12 20:13:16 -05:00
reports.js Phase 2.2g: reports.js scoped to workspace_id; fixes pre-existing /export and /uptime cross-tenant leaks 2026-05-11 21:36:54 -05:00
schedules.js Default a video playlist item to the clip's own length (#237) 2026-08-06 09:36:53 -05:00
status.js #240: stop the morning wave buying itself a blocking checkpoint 2026-08-06 20:22:21 -05:00
stripe.js feat(stripe): enable promotion codes on checkout sessions (#227) 2026-07-23 23:44:18 -05:00
subscription.js Initial open source release 2026-04-08 12:14:53 -05:00
teams.js feat(teams): temporarily disable Teams API while feature is redesigned 2026-05-12 13:30:55 -05:00
tokens.js feat(agency): per-token upload folder — auto-created, subtree-confined (#158) (#171) 2026-07-12 21:23:25 -05:00
video-walls.js Describe a portrait video wall as portrait, and stop a wall hiding its screens 2026-08-06 09:46:31 -05:00
white-label.js fix(security): patch quick-win findings from the codebase review 2026-06-08 19:02:19 -05:00
widgets.js Stop shrinking hand-written text widgets into illegibility 2026-07-30 20:28:28 -05:00
workspaces.js fix(workspaces): use APP_URL env var for invite-accept URL generation 2026-05-17 15:26:07 -05:00