[OAUTH-WG] Refreshing tokens on the RS

Jim Schaad <ietf@augustcellars.com> Tue, 05 May 2020 15:18 UTC

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From: Jim Schaad <ietf@augustcellars.com>
To: 'oauth' <oauth@ietf.org>
CC: <draft-ietf-ace-oauth-authz@ietf.org>, 'Benjamin Kaduk' <kaduk@mit.edu>
Date: Tue, 5 May 2020 08:18:42 -0700
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Subject: [OAUTH-WG] Refreshing tokens on the RS
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Over in the ACE working group we are currently having a discussion about
refreshing tokens on an RS.  I want to make sure that this is not something
that this working group has already solved.  The basic scenario is:

1.  Client gets token T1 and posts it to the RS
2.  After some time the RS returns and error to the client about an access
3.  Client gets a new token from the AS T2, possibly using a refresh token.
4. Client posts the token T2 to the RS
5.  The RS somehow needs to associate token T1 and T2 for long term security

I do not believe that OAuth has this issue because there is not currently
any concept that a token is used for anything other than a single
request/response between the client and the RS.  There is no idea of the RS
storing tokens long term associated with a TLS session that might need to
have the access rights for that TLS session changed.

Please provide any feedback that you might have.