Some OIDC identity providers may provide a random value in the "sub"
field instead of an identifying ID. In this case, it may be a good
idea to fallback to matching the user on its email field.
The userinfo endpoint can return 2 content types:
- application/json
- application/jwt
Gitlab oidc returns a json object, while
Agent Connect oidc returns a jwt token.
We are adapting the authentication to handle both cases.
The default Logout view provided by Mozilla Django OIDC is not suitable
for the Agent Connect Logout flow.
Previously, when a user was logging-out, only its Django session was ended.
However, its session in the OIDC provider was still active.
Agent Connect implements a 'session/end' endpoint, that allows services to
end user session when they logout.
Agent Connect logout triggers cannot work with the default views implemented
by the dependency Mozilla Django OIDC. In their implementation, they decided
to end Django Session before redirecting to the OIDC provider.
The Django session needs to be retained during the logout process.
An OIDC state is saved to the request session, pass to Agent Connect Logout
endpoint, and verified when the backend receives the Logout callback from Agent
Connect. It seems to follow OIDC specifications.
If for any reason, the Logout flow cannot be initiated with Agent Connect,
(missing ID token in cache, unauthenticated user, etc), the user is redirected
to the final URL, without interacting with Agent Connect.
Prepare adding advanced authentication features. Create a dedicated
authentication Python package within the core app.
This code organization will be more extensible.
