Re: [OAUTH-WG] allowing offline access for native app & its backend server
nov matake <nov@matake.jp> Sat, 21 November 2015 14:12 UTC
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From: nov matake <nov@matake.jp>
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Date: Sat, 21 Nov 2015 23:12:37 +0900
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To: John Bradley <ve7jtb@ve7jtb.com>
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Cc: oauth@ietf.org
Subject: Re: [OAUTH-WG] allowing offline access for native app & its backend
server
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Thanks John, I’m also OK to exchange id_token (from token endpoint) with access/refresh token using OAuth assertion flow etc., if the AuthZ server is OpenID Connect IdP. (In my case, AuthZ server would be OIDC IdP) ps. I also want to use PKCE for the native app & its backend combination case. So id_token given from authorization endpoint won’t be my solution. > On Nov 21, 2015, at 23:00, John Bradley <ve7jtb@ve7jtb.com> wrote: > > There is a missing step in this flow that also needs to be considered, and that is how the app authenticates to the backend server. > > In the Google case they are providing a JWT/id_token to the client from the token endpoint for the client to use for it’s authentication to it’s backend. > > It would not be a huge step to have the backend then use token exchange along with it’s credentials to exchange that for a refresh token. > > I can see giving out two codes and we have discussed that in the past. > > This topic should perhaps be added to the list of things for rechartering. There are a lot of interactions and posable security side effects that need to be looked at. > > John B. > > >> On Nov 21, 2015, at 9:55 AM, nov matake <nov@matake.jp> wrote: >> >> Hi OAuthers, >> >> I’m thinking the way to issue refresh tokens both to native app and its backend server at same time. >> I have 2 ideas currently. >> >> 1. including 2 audience in a single authorization code, and allow using the code once per the audience. >> 2. issuing 2 code one for native app, one for backend server. >> >> 1st way means code can be used twice, so it can break RFC6749. >> 2nd way means defining another code (ex. code_for_backend etc.) >> >> Does someone has implementation supporting such use-case? >> >> — >> nov >> _______________________________________________ >> OAuth mailing list >> OAuth@ietf.org >> https://www.ietf.org/mailman/listinfo/oauth > > _______________________________________________ > OAuth mailing list > OAuth@ietf.org > https://www.ietf.org/mailman/listinfo/oauth