[Openid-specs-ab] Behaviour of OIDC 'prompt=none' when logged in

Thomas Broyer t.broyer at gmail.com
Tue Jul 19 09:06:42 UTC 2016

On Mon, Jul 18, 2016 at 1:34 PM Hasanthi Purnima Dissanayake <
hasanthi at wso2.com> wrote:

> Hi All,
> According to the spec [1] when prompt=none the result should as below.
>> The Authorization Server MUST NOT display any authentication or consent
>> user interface pages. An error is returned if an End-User is not already
>> authenticated or the Client does not have per-configured consent for the
>> requested Claims or does not fulfill other conditions for processing the
>> request
> If we consider a scenario like
> 1. User sends authorization request without any prompt value to the IS
> server
> 2. Server gives the login page
> 3. User provides credentials
> 4. Authentication successful and server returns consent page
> 5. User provides consent as 'Approve'
> 6. User send a authorization request with prompt =none
> So do we consider this consent which we have set in the same session as a
> pre-configured consent or do we need to return an error with
> consent-required error code?

What would you do if 6. was happening without the prompt=none?
If you'd do a transparent redirect back to the redirect_uri (e.g. because
the requested scopes were already granted), then do the same with
If you'd show a page to the user asking for consent, then return a
consent_required error; and more generally if you'd show any other page to
the user, then return the appropriate error instead.
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