Hi Warren, There are four parties in this flow: the resource owner client, the third party client, the resource server and the AS. The token issued by AS to third party client is not presented to the resource owner client – it is only presented to the resource server when third party client is accessing the resources. This means that the resource owner client cannot revoke that token because it will have to have a possession of it to present it to the revocation endpoint… Maybe I am completely missing your point, so can you, please, clarify.
Cheers, Igor From: Warren Parad [mailto:wpa...@rhosys.ch] Sent: Sunday, 19 May 2024 7:14 PM To: Igor Janicijevic <i...@ivagor.com> Cc: Thomas Broyer <t.bro...@gmail.com>; <oauth@ietf.org> <oauth@ietf.org> Subject: Re: [OAUTH-WG] Re: New Internet Draft: OAuth 2.0 Delegated B2B Authorization But the AS is already governing the access between clients, so at the surface at least I'm not able to wrap my head around your counterargument. Also this: Also, the resource owner client cannot easily revoke tokens issued to third party clients that it federates access with. Why not? It is just as easy to revoke a token issued to third party clients as it is to do in any OAuth compatible RS. What makes this case special for you, that the "Resource Owner" (your service client) in this case would not be able to revoke the tokens issued to the "Client" (the Third party application). Isn't this all doable with OAuth in spec without any magic? On Sun, May 19, 2024 at 10:28 AM Igor Janicijevic <i...@ivagor.com<mailto:i...@ivagor.com>> wrote: Yes, technically you can use token exchange to federate access but you have to manage AS policy for each combination of clients that need to exchange tokens. Also, the resource owner client cannot easily revoke tokens issued to third party clients that it federates access with. This draft tries to address those issues by giving resource owner client ability to delegate as much or as little access as they need to as well as the ability to revoke that delegation at any point in time. This also means that AS does not need to maintain policy that governs the federation (or delegation) of access between the clients. Regards, Igor From: Warren Parad [mailto:wpa...@rhosys.ch<mailto:wpa...@rhosys.ch>] Sent: Sunday, 19 May 2024 1:36 AM To: Thomas Broyer <t.bro...@gmail.com<mailto:t.bro...@gmail.com>> Cc: Igor Janicijevic <i...@ivagor.com<mailto:i...@ivagor.com>>; <oauth@ietf.org<mailto:oauth@ietf.org>> <oauth@ietf.org<mailto:oauth@ietf.org>> Subject: Re: [OAUTH-WG] Re: New Internet Draft: OAuth 2.0 Delegated B2B Authorization That was my first thought, but since we only have one AS, isn't just this just OAuth but switching up which is the RS and which is the user agent? Why wouldn't the third party just request a client_credentials grant for the RS using the appropriate audience? On Sat, May 18, 2024, 16:52 Thomas Broyer <t.bro...@gmail.com<mailto:t.bro...@gmail.com>> wrote: Isn't that covered by Token Exchange already? https://datatracker.ietf.org/doc/html/rfc8693 Le sam. 18 mai 2024, 16:29, Igor Janicijevic <i...@ivagor.com<mailto:i...@ivagor.com>> a écrit : Dear All, I have published an Internet Draft document that I would like to introduce to the OAuth working group for consideration. Here is the link for your reference: https://www.ietf.org/archive/id/draft-janicijevic-oauth-b2b-authorization-00.html Abstract Delegated B2B Authorization enables a third-party OAuth client to obtain a limited access to an HTTP service on behalf of another OAuth client which is acting as a resource owner. This specification extends the OAuth 2.0 Authorization Framework with two new endpoints which allow a resource owner OAuth client to manage access for a third-party OAuth client. Motivation I work for a large financial services organization, and we are using OAuth 2.0 extensively to secure API based B2B integrations with various third parties by utilizing OAuth client_credentials grant type. Some of those third parties are our customers, while others are either our partners or partners of our customers. One of the challenges that we have encountered is that there is no standard way to delegate access to resources in B2B integrations, so that one party can obtain access to protected resources on behalf of another party. The above internet draft describes a possible extension to OAuth 2.0 that may be able to address this issue. I am looking forward to receiving your feedback. Regards, Igor _______________________________________________ OAuth mailing list -- oauth@ietf.org<mailto:oauth@ietf.org> To unsubscribe send an email to oauth-le...@ietf.org<mailto:oauth-le...@ietf.org> _______________________________________________ OAuth mailing list -- oauth@ietf.org<mailto:oauth@ietf.org> To unsubscribe send an email to oauth-le...@ietf.org<mailto:oauth-le...@ietf.org>
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