[Jwt-reg-review] [IANA #1158948] Requested review for IANA registration in draft-ietf-ace-oauth-params (jwt - JSON Web Token Claim)

["Sabrina Tanamal via RT" <[e-mail]>]

Dear John, Michael, and Chuck,

Have you had a chance to review the registration in draft-ietf-ace-oauth-params?

https://tools.ietf.org/html/draft-ietf-ace-oauth-params

Thanks,

Sabrina Tanamal
Senior IANA Services Specialist

On Thu Jan 30 00:40:53 2020, sabrina.tanamal wrote:
> Dear John, Michael, and Chuck,
> 
> Have you had a chance to review the registration in draft-ietf-ace-
> oauth-params?
> 
> https://tools.ietf.org/html/draft-ietf-ace-oauth-params
> 
> Thanks,
> 
> Sabrina Tanamal
> Senior IANA Services Specialist
> 
> > On Thu, Jan 23, 2020 at 02:31:20PM -0700, Brian Campbell wrote:
> > > Apologies, I forgot to reply-all at some earlier point and dropped
> > > the
> > > mailing lists and other cc's off the thread. Added back now.
> > >
> > > And also apologies because I think I need to recuse myself from the
> > > DE
> > > responsibility on the JWT registry request here. I've spent more
> > > time
> > > than
> > > I'd like to admit or really have to spare on it and am still
> > > struggling to
> > > understand.
> > >
> > > I appreciate you pointing out the authz-info endpoint in ACE but I
> > > still
> > > don't follow how "rs_cnf" in an access token would really work in
> > > practice.
> > > The client sends the token to the RS's authz-info endpoint on an
> > > insecure
> > > connection or one that has the server auth with potentially
> > > different
> > > key
> > > and the RS stores the access token for later use. Then on resource
> > > access
> > > the RS looks up the access token (with respect to the cnf key in
> > > it)
> > > based
> > > on the key the client used in establishing a new mutually
> > > authentication
> > > connection to the RS. For the RS to choose a key for server it will
> > > use
> > > during the handshake (and as far as I know the server key is the
> > > first in
> > > the authn process of the handshake) based on the "rs_cnf" in the
> > > access
> > > token, it needs to remember and associate that client and the
> > > access
> > > token
> > > with something else (IP address?) that will be available during the
> > > handshake. It doesn't fit together for me in a way that seems
> > > likely
> > > to
> > > work or be interoperable but, like I said, I'm really struggling to
> > > understand.
> > >
> > > On Thu, Jan 16, 2020 at 12:54 AM Seitz Ludwig
> > > <[e-mail]>
> > > wrote:
> > >
> > > > Hi Brian,
> > > >
> > > >
> > > >
> > > > Comments inline.
> > > >
> > > >
> > > >
> > > > /Ludwig
> > > >
> > > >
> > > >
> > > > *From:* Brian Campbell <[e-mail]>
> > > > *Sent:* den 13 januari 2020 21:22
> > > > *To:* Seitz Ludwig <[e-mail]>
> > > > *Subject:* Re: [Ace] Requested review for IANA registration in
> > > > draft-ietf-ace-oauth-params
> > > >
> > > >
> > > >
> > > > Thanks for the response and updates Ludwig,
> > > >
> > > >
> > > >
> > > > Please bear with me while I try to wrap my head around some
> > > > things.
> > > >
> > > >
> > > >
> > > > The JWT registration request for the "rs_cnf" claim points to Sec
> > > > 3.3
> > > > <https://tools.ietf.org/html/draft-ietf-ace-oauth-params-
> > > > 08#section-3.3>
> > > > saying it is "a hint [in the access token] to the RS about which
> > > > key it
> > > > should use to authenticate towards the client".  But doesn't the
> > > > client
> > > > have to go through the DTLS/TLS handshake with the RS (which is
> > > > presumably
> > > > when it authenticates to the client) before it presents the
> > > > access
> > > > token?
> > > > I'm not seeing how this would work as seems the RS won't see the
> > > > hint until
> > > > after it needs it.
> > > >
> > > >
> > > >
> > > >
> > > >
> > > > [LS] Not in the ACE flow. We use the access token to establish
> > > > keys
> > > > at the
> > > > RS both for the client and the RS. We have therefore defined a
> > > > new
> > > > ACE-OAuth endpoint (authz-info) at the RS. The client can POST
> > > > access
> > > > tokens to this endpoint without prior authentication.
> > > >
> > > > At that point, the RS only validates the signature/MAC by the AS.
> > > >
> > > >
> > > >
> > > > Later at the time of access, the corresponding token is linked to
> > > > the
> > > > access request via the pop-mechanism and the client/access
> > > > specific
> > > > parts
> > > > are validated (e.g. scope, subject).
> > > >
> > > >
> > > >
> > > > Hope that clarifies things a bit.
> > > >
> > > >
> > > >
> > > > On Sat, Jan 11, 2020 at 8:30 AM Seitz Ludwig
> > > > <[e-mail]>
> > > > wrote:
> > > >
> > > > Hello again Brian,
> > > >
> > > >
> > > >
> > > > Thank you for reviewing this! Indeed the handling of JWT/JSON
> > > > interactions
> > > > was handled sloppily here. I will soon issue a draft update that
> > > > specifies
> > > > that the JSON-based interactions should use the syntax from
> > > > RFC7800
> > > > while
> > > > the CBOR-based ones should use ID.ietf-ace-cwt-proof-of-
> > > > possession.
> > > >
> > > >
> > > >
> > > > This correction goes for all the use of “cnf”, “req_cnf” and
> > > > “rs_cnf”.
> > > >
> > > >
> > > >
> > > > Regards,
> > > >
> > > >
> > > >
> > > > Ludwig
> > > >
> > > >
> > > >
> > > > *From:* Ace <[e-mail]> *On Behalf Of *Brian Campbell
> > > > *Sent:* den 10 januari 2020 22:12
> > > > *To:* Ludwig Seitz <[e-mail]>
> > > > *Cc:* Roman Danyliw <[e-mail]>; [e-mail]; Jim
> > > > Schaad <
> > > > [e-mail]>; The IESG <[e-mail]>; [e-mail];
> > > > [e-mail]; Benjamin Kaduk <[e-mail]>
> > > > *Subject:* Re: [Ace] Requested review for IANA registration in
> > > > draft-ietf-ace-oauth-params
> > > >
> > > >
> > > >
> > > > That  "rs_cnf" claim registration request in 9.1 points to 3.3
> > > > which says
> > > > it has 'the same syntax and semantics as defined in for the
> > > > "rs_cnf"
> > > > parameter', which I think is in 4.1. And 4.1 says that the
> > > > "rs_cnf"
> > > > values
> > > > 'follow the syntax of the "cnf" claim from section 3.1 of
> > > > [I-D.ietf-ace-cwt-proof-of-possession].' Similar to other
> > > > comments
> > > > I've
> > > > made today, I don't follow what that would mean for the value of
> > > > the claim
> > > > when it's a JWT. And that seems like something that's important
> > > > to
> > > > understand for the purpose of a JWT claims registry request.
> > > >
> > > >
> > > >
> > > >
> > > >
> > > > On Sat, Dec 21, 2019 at 4:11 AM Ludwig Seitz
> > > > <[e-mail]>
> > > > wrote:
> > > >
> > > > Hello JWT registry reviewers,
> > > >
> > > > the IESG-designated experts for the JWT claims registry have
> > > > asked
> > > > me to
> > > > send a review request to you about the "rs_cnf" claim registered
> > > > here:
> > > >
> > > > https://tools.ietf.org/html/draft-ietf-ace-oauth-params-
> > > > 07#section-
> > > > 9.1
> > > >
> > > > Thank you in advance for you review comments.
> > > >
> > > > Regards,
> > > >
> > > > Ludwig
> > > >
> > > > _______________________________________________
> > > > Ace mailing list
> > > > [e-mail]
> > > > https://www.ietf.org/mailman/listinfo/ace
> > > >
> > > >
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