[keycloak-user] OIDC protocol extension

[Dmitry Telegin]

Hello Neelima,

I think this can be solved with a custom authenticator, as Stian suggested.

To make it appear unconditionally, regardless of the authentication status, configure your flow like this: https://i.imgur.com/TwslFME.png

The idea is to move the actual authentication stuff into a subflow and make it "alternative", while your authenticator should be "required". Each time Keycloak auth endpoint is requested, the authenticator will be invoked even if the user is already logged in.

Good luck,
Dmitry Telegin
CTO, Acutus s.r.o.
Keycloak Consulting and Training

Pod lipami street 339/52, 130 00 Prague 3, Czech Republic
+42 (022) 888-30-71
E-mail: info at acutus.pro

On Tue, 2018-10-23 at 18:03 +0000, Karipineni, Neelima,M.D. wrote:
> I believe that’s essentially what the action-token-authenticator quickstart does. I tested this out and it only shows the additional step if the user has not previously authenticated. If the user has an existing session, it forwards to an error page that says “You are already logged in”. I did make it required and not optional though, since my understanding is that only one optional authenticator needs to successfully run.
> 
> We need something that displays the additional consent step every time there is a new auth code request with the specified scope, regardless of whether the user has previously authenticated. It’s also preferable that the user has successfully authenticated prior to showing the additional consent page, because there may be confidential data on the consent page (ie, a search widget for a patient identifier).
> 
> > From: Stian Thorgersen <sthorger at redhat.com>
> > > Reply-To: "stian at redhat.com" <stian at redhat.com>
> Date: Tuesday, October 23, 2018 at 1:51 PM
> > To: "Karipineni, Neelima,M.D." <NKARIPINENI at BWH.HARVARD.EDU>
> > Cc: keycloak-user <keycloak-user at lists.jboss.org>
> Subject: Re: [keycloak-user] OIDC protocol extension
> 
> 
>         External Email - Use Caution
> I wouldn't to a custom login protocol as that would be very hard to maintain. We've actually ended up refactoring the branch you point to into not using a login protocol.
> 
> Why not use an optional authenticator for this purpose? It can check the scope and only display the additional consent step if the certain auth request scope is there. It can then add a note to the user session which you can map into the token with a protocol mapper.
> 
> 
> 
> > On Tue, 23 Oct 2018 at 18:29, Karipineni, Neelima,M.D. <NKARIPINENI at bwh.harvard.edu<mailto:NKARIPINENI at bwh.harvard.edu>> wrote:
> We have a use case where we’re trying to implement an OAuth2 profile which requires an extra claim on the access token when a certain auth request scope is used.
> The expected behavior is that when a certain scope is present in the auth endpoint request then during the Authorization flow the user is shown an extra screen where they input an identifier which ultimately is included as a claim in the access token. Details are at http://docs.smarthealthit.org/authorization/ (Standalone launch sequence) for reference.
> 
> Any suggestions on how to accomplish this in keycloak? I considered using an ActionToken like in the quickstarts external action token example, but the additional execution needs to happen even when the user has previously authenticated. It’s like an additional consent step after user and client authentication rather than an additional authentication step.
> 
> My current thought is to implement a custom LoginProtocol that wraps OIDCLoginProtocol, as shown in https://github.com/keycloak/keycloak/tree/openshift-integration/services/src/main/java/org/keycloak/protocol/kubernetes, and have an additional redirect in the authenticated method that functions similarly to the external action token example. The callback endpoint would persist the extra claim against the client session until the access token is requested.
> 
> I’m not sure it’s possible to extend the OIDC protocol within a new protocol. Preliminarily after installing a shell wrapper protocol, it’s missing the OIDC configuration properties and mappers in the admin console. Is something like this possible without copying/recreating large chunks of the OIDC code? If not, any suggestions on alternative ways to accomplish this?
> 
> As an additional wrench, we’re still on v3.3.0 and upgrade is not on the schedule as of now.
> 
> 
> 
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