Re: [keycloak-user] Token exchange: on-behalf-of + downgrade
IIRC, you can use a scope parameter when doing a token exchange. Other
aspects could be managed by setting up client scopes to your client
applications, did you try that ?
On Wed, Feb 27, 2019 at 12:59 PM Alexey Titorenko <titorenko(a)dtg.technology>
wrote:
Hi Pedro!
Thank you for answer!
I’m would like to be able to control all aspects: audience, scope and
roles.
Today I also found that exchanged token may contain more roles than it is
defined through on Scope tab for svc-1, if caller has some additional
roles. So, after token echange svc-1 can have more rights than it would be
possible without token exchange.
Alexey.
On 27 Feb 2019, at 18:50, Pedro Igor Silva <psilva(a)redhat.com> wrote:
Hi,
The token exchange should be the right tool. Are you trying to downgrade
scopes or just remove the client roles that are not related with svc-2 ?
Regards.
Pedro Igor
On Tue, Feb 26, 2019 at 5:33 AM Alexey Titorenko <titorenko(a)dtg.technology>
wrote:
> Hello guys.
>
> I would like to ask you help with the following. I’m currently looking at
> on-behalf-of scenario with Keycloak. In this case we have ‘web app’ calling
> ’svc-1’, which in turn calls another service ‘svc-2’. That is, we have:
> web —> svc-1 —> svc-2.
>
> The idea is to let svc-2 know who is actual initiator of the call chain
> (end-to-end identity propagation). The question is about how to do that
> with Keycloak.
>
> First, in order to propagate caller identity we could exchange tokens in
> ‘svc-1’. In this case we can have correct audience and, thus, control token
> usage. Second, we need is to remove any excessive permissions (client
> roles) that are not related to ‘svc-2’ call in order to reduce potential
> harm in case this token is intercepted by someone.
>
> And if I know how to exchange tokens, I cannot find how to downgrade the
> token during the exchange. As I see in documentation, ‘scope’ parameter is
> not supported for token exchange.
>
>
> So, my questions are:
> Is token exchange a right tool for this task?
> Is it possible to downgrade exchanged token? And how, if so?
>
>
> Thank you,
> Alexey
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