[OAUTH-WG] Re: [Technical Errata Reported] RFC7519 (8060)

[Pieter Kasselman <[e-mail]>]

Hi Brian, agreed, and thanks for pointing that out. Suggestion below:



Notes
-----
Validation step 5 in section 7.2 of RFC 7519 states that header parameters should only be ignored if they are explicitly specified as needing to be ignored.

This is contrary to step 7 in section 7.2 of RFC 7519 which requires that the processing rules of RFC 7515 should be followed if the JWT is a JWS, or the rules of RFC7516 should be followed if the JWT is a JWE. Neither RFC 7515 nor RFC 7516 include any special provisions for only ignoring header parameters if they are specified as being ignored, but instead requires all header parameters to be ignored if they are not understood, except if they are critical.

This errata clarifies that JOSE Header parameters should be verified according to RFC7515 (JWS) or RFC7516 (JWE).




From: Brian Campbell <bcampbell=[e-mail]>
Sent: Monday 12 August 2024 19:46
To: Pieter Kasselman <[e-mail]>
Cc: David Waite <[e-mail]>; Paul Wouters <[e-mail]>; RFC Errata System <[e-mail]>; [e-mail]; [e-mail]
Subject: Re: [OAUTH-WG] Re: [Technical Errata Reported] RFC7519 (8060)

Thanks Pieter,

That sounds good to me. I think a bit of the explanatory text in the "Notes" part of the errata likely needs to be adjusted accordingly too.



On Mon, Aug 12, 2024 at 5:01 AM Pieter Kasselman <pieter.kasselman=[e-mail]<mailto:[e-mail]>> wrote:
Thanks David and Brian.

Unless there are any concerns with adopting the alternative text, I would suggest the following for the errata in section 7.2 bullet 5:

Original Text
-------------
   5.   Verify that the resulting JOSE Header includes only parameters
        and values whose syntax and semantics are both understood and
        supported or that are specified as being ignored when not
        understood.

Corrected Text
--------------
   5.  Verify the resulting JOSE Header according to RFC7515 or RFC7516.

Cheers

Pieter

From: David Waite <david=[e-mail]<mailto:[e-mail]>>
Sent: Monday 5 August 2024 22:43
To: Pieter Kasselman <pieter.kasselman=[e-mail]<mailto:[e-mail]>>
Cc: Paul Wouters <paul.wouters=[e-mail]<mailto:[e-mail]>>; RFC Errata System <[e-mail]<mailto:[e-mail]>>; [e-mail]<mailto:[e-mail]>; [e-mail]<mailto:[e-mail]>
Subject: [OAUTH-WG] Re: [Technical Errata Reported] RFC7519 (8060)



On Aug 5, 2024, at 1:52 PM, Pieter Kasselman <pieter.kasselman=[e-mail]<mailto:pieter.kasselman=[e-mail]>> wrote:

I tried to keep the changes to additional text that would scope the processing rules more precisely for the JWT/JWS/JWE cases (point 7 in the processing steps references JWS and JWE separately, so thought I would propose text that does something similar to that). The idea of additional text is that a reader who is familiar may find it easier to process the delta.

However, if we want to change the text, I like your second option:

"Verify the resulting JOSE Header according to RFC7515 or RFC7516."

I don’t think we should delete the bullet completely.

Cheers

Pieter

I prefer this over the current text, which might be incorrectly construed to provide counter guidance to the “crit” protected header parameter.

-DW
_______________________________________________
OAuth mailing list -- [e-mail]<mailto:[e-mail]>
To unsubscribe send an email to [e-mail]<mailto:[e-mail]>

CONFIDENTIALITY NOTICE: This email may contain confidential and privileged material for the sole use of the intended recipient(s). Any review, use, distribution or disclosure by others is strictly prohibited.  If you have received this communication in error, please notify the sender immediately by e-mail and delete the message and any file attachments from your computer. Thank you.