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Add company welcome and verified NetKingdom sign-in
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# Company welcome and NetKingdom sign-in
VERGABE-WP-0019-T06. The isolated company instance consumes Authorization Code
with S256 PKCE and a browser-bound state and nonce. It discovers endpoints from
the configured HTTPS issuer, pins RS256, verifies signature/issuer/audience,
time and nonce, and uses a unique `(issuer, subject)` record for the local user.
It never merges accounts by email or directory display name.
Admission requires the exact configured tenant, `tenant_source: directory`, a
human principal and the signed `<tenant>:users` membership group. Suspended,
platform and emergency identities fail. This is the existing invited-company
pilot rule: admitted members collaborate on all company tenders. Tenant-admin
claims do not grant Django staff or superuser rights. New local users have no
usable local password. Local deactivation immediately blocks existing sessions;
provider-side revocation is bounded by the product's absolute five-minute
session maximum (or the token expiry, whichever comes first).
The welcome page never consumes password-setup tokens. A CSRF-protected sign-in
action clears the current product session and requests `prompt=login`. A valid
callback displays the verified account and requires another CSRF-protected
confirmation before creating a product session. External `next` and `return_to`
parameters are not used. The callback redirects to a clean URL before displaying
identity. Gunicorn access logging records the URL path without query strings.
Passwords and bearer tokens are not persisted in the product.
## Exact demo binding
Enable only with the registered client and the verified KeyCape fresh-login
release. The currently deployed `dcebd46` issuer lacks `tenant_source` and does
not propagate fresh-login requests to Authelia; this product fails closed on it.
```
NETKINGDOM_ENABLED=true
NETKINGDOM_ISSUER=https://kc.coulomb.social
NETKINGDOM_CLIENT_ID=vergabe-demo-company
NETKINGDOM_CALLBACK=https://vergabe-teilnahme.coulomb.social/demo-company/accounts/oidc/callback/
NETKINGDOM_TENANT=tenant:trial:demo-company
COMPANY_DISPLAY_NAME=Demo Company
```
Use a public client with only `openid profile groups`, `authorization_code`,
and the exact callback above. Do not add a client-declared tenant or a weaker
MFA override. Keep the existing provider MFA policy. The application namespace
requires narrowly scoped HTTPS egress to the issuer; its existing policy only
allows database traffic and DNS.
NetKingdom's password setup maps `tenant:trial:demo-company` to the fixed HTTPS
company entry in `PASSWORD_SETUP_TENANT_RETURNS`. That return is stored inside
the setup grant at issuance and released only after successful consumption.
There is no browser-supplied return address, recipient credential transfer,
automatic product login or modification to the operator's portal session.
Existing setup grants have no new destination; issue a fresh link if needed.
## Release and acceptance
Run application tests, assets build and migration drift checks, publish the
exact source, and pin its digest in the existing Railiance pilot values.
Migration 0003 adds only the unique identity mapping table. Keep the accepted
60m CPU / 256Mi memory request and both data claims. Disabling
NETKINGDOM_ENABLED restores the interim local login; OIDC-created users still
have unusable local passwords, so rollback does not manufacture credentials.
Keep the added table when reverting an application image.
KeyCape's current main also contains previously accepted startup and token
issuance changes after deployed source dcebd46; validate the live registration
configuration before upgrading (key-cape/docs/operations.md). Existing login
attempts are process-local and are lost on its single-replica Recreate rollout.
Password-setup links are likewise process-local and expire on provisioner restart.
Native acceptance still requires the actual invited user to complete setup,
fresh sign-in and any provider-required MFA, confirm their account, and enter
the company workflow. Do not substitute an operator session. Recovery and
two-user workflow acceptance remain the existing RAPPS-WP-0014-T03 and
VERGABE-WP-0019-T04 tasks.