Re: [OAUTH-WG] A few comments on draft-ietf-oauth-rar-01

Vladimir Dzhuvinov <vladimir@connect2id.com> Thu, 09 July 2020 08:53 UTC

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Subject: Re: [OAUTH-WG] A few comments on draft-ietf-oauth-rar-01
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On 09/07/2020 11:07, Neil Madden wrote:
>
>>
>> An AS is always free to implement the 2 step solution that you
>> proposed and indeed it could be easier to implement with RAR in the
>> manner you described, but I don't think it should be the prescribed
>> approach.
>
> How can an AS implement this with RAR? This is my point - there is no
> mechanism at all in RAR to link a transaction to any kind of prior
> consent. It’s not about mandating such an approach, it’s about
> *supporting* it at all. Every transaction in RAR is a blank slate at
> the moment.

The ability to reference an existing grant is a general problem with OAuth.

The grant management draft has a "grant_id" parameter which can be used
to reference prior consent. I suppose to reference prior consent as
context only a new |grant_management_mode|may be needed.

https://bitbucket.org/openid/fapi/src/master/Financial_API_Grant_Management.md

We also have OAuth Incremental Authorization, which references a refresh
token:

https://tools.ietf.org/html/draft-ietf-oauth-incremental-authz-04


Vladimir