+1 on the proposal

Jean-François “Jeff” Lombardo | Amazon Web Services

Architecte Principal de Solutions, Spécialiste de Sécurité
Principal Solution Architect, Security Specialist
Montréal, Canada

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From: Karl McGuinness <[email protected]>
Sent: December 5, 2025 12:12 PM
To: Brian Campbell <[email protected]>
Cc: Aaron Parecki <[email protected]>; Judith Kahrer 
<[email protected]>; oauth <[email protected]>
Subject: [EXT] [OAUTH-WG] Re: Identity Assertion JWT Authorization Grant - RAR


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+1

I think it helps connect the dots for folks that don't have all the specs paged 
into context.  I was going to add a non-normative example in a future update as 
I already have been asked this a few times.  I can open a Github issue to track.

-Karl

On Fri, Dec 5, 2025 at 8:52 AM Brian Campbell 
<[email protected]<mailto:[email protected]>>
 wrote:
Agree with Aaron's perspective here. But it might be useful to have a small 
note saying as much. I wonder if we should also consider describe/define using 
the authorization_details claim in the ID-JAG similar to scope?

On Fri, Dec 5, 2025 at 9:24 AM Aaron Parecki 
<[email protected]<mailto:[email protected]>> wrote:
Yes, RAR can definitely be layered onto this flow. Section 3 of RAR says "The 
authorization_details authorization request parameter can be used to specify 
authorization requirements in all places where the scope parameter is used for 
the same purpose" https://datatracker.ietf.org/doc/html/rfc9396#section-3

It's not strictly necessary to list authorization_details as a supported 
parameter in the Token Exchange request and in the ID-JAG claims in order to 
use it in those places, as they are already extensible. However if you think it 
would be helpful to have an explicit pointer to RAR I can definitely add it.

Aaron


On Fri, Dec 5, 2025 at 12:26 AM Judith Kahrer 
<[email protected]<mailto:[email protected]>> 
wrote:
Hi,

I have another thought about processing the ID-JAG... The ID-JAG is a grant. As 
such, shouldn't it support RAR (RFC 
9396<https://datatracker.ietf.org/doc/html/rfc9396#name-authorization-request>)?
For example, add authorization_details as an optional claim in the list of 
claims in section 3 and as a parameter to the relevant request and responses.

Best regards,
Judith
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