[OAUTH-WG] Adam Roach's Discuss on draft-ietf-oauth-jwt-introspection-response-07: (with DISCUSS and COMMENT)

Adam Roach via Datatracker <noreply@ietf.org> Wed, 04 September 2019 07:44 UTC

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Subject: [OAUTH-WG] Adam Roach's Discuss on draft-ietf-oauth-jwt-introspection-response-07: (with DISCUSS and COMMENT)
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Adam Roach has entered the following ballot position for
draft-ietf-oauth-jwt-introspection-response-07: Discuss

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Thanks for the work the authors and other contributors have
put into creating this document.

I have a privacy concern that I think warrants text in the document.

Section 8.3.1 introduces a significant amount of personally-identifiable
information. While I understand that this is needed for the use case
cited in the introduction (issuing certificated for electronic signatures),
I think the document needs some treatment of the sensitivity of this
information, the basis that the server uses to decide whether to include
it, and how consent to disclose it might be obtained from the user.

I'm putting this in as a DISCUSS, because I really do think this is
a showstopper for publication. I am quite aware, however, that I might
simply be missing some important aspect of the solution that makes my
concerns moot. Please point me in the right direction if this is the
case, and I'll be happy to clear.



>  The example response contains the following JSON document:
>  {
>    "sub": "Z5O3upPC88QrAjx00dis",
>    "aud": "https://protected.example.net/resource",
>    "scope": "read write dolphin",
>    "iss": "https://server.example.com/",
>    "active": true,
>    "exp": 1419356238,
>    "iat": 1419350238,
>    "client_id": "l238j323ds-23ij4",
>    "given_name": "John",
>    "family_name":"Doe",
>    "birthdate":"1982-02-01"
>  }

The example response actually contains the following JSON document:

   "scope":"read write dolphin",

Note the presence of "extension_field" and "username" fields, and the
absence of "given_name", "family_name", and "birthdate" fields. There's
also a bunch of unnecessarily escaped "/" characters in the document
in the JWT, but not the expanded example; and while these are semantically
insignificant, the discrepancy seems gratuitous.

It is probably worthwhile updating either the JWT or the expanded
example so that they match.