On Fri, Jan 19, 2018 at 10:49 AM, Dave Crocker <[email protected]> wrote:

> On 1/18/2018 11:14 PM, Murray S. Kucherawy wrote:
>
>> -01 will be up soon, incorporating the suggested changes in prose and
>> ABNF discussed previously on this list.
>>
>
>
> If I missed this, I apologize, but would it be possible to post a message
> which summarizes the nature/goals of the changes that are planned?
>
> I'm not challenging the work, but just wanting to make sure the wg is in
> synch about how the doc should be adjusted.
>
> Thanks.
>
> d/


The intent is outlined in high level within the -10 version (section 5.2)
of the protocol doc. The better explanation is in Seth's email from
September (
https://mailarchive.ietf.org/arch/msg/dmarc/xUUbT15vqoBmH7RraJ_pesrd9z0):

1) The optimal ABNF for AAR would inherit the A-R payload ABNF from 7601.
Unfortunately, authres-header was defined in a way that makes this
difficult. Is there a better way to say that the AAR inherits the A-R
payload, and if anything modifies the definition of authres-header in 7601,
the AAR also needs to inherit this change?

To be super specific, this is the current authres-header ABNF from 7601:

     authres-header = "Authentication-Results:" [CFWS] authserv-id
              [ CFWS authres-version ]
              ( no-result / 1*resinfo ) [CFWS] CRLF

Optimally, there would be:

     authres-payload = [CFWS] authserv-id
              [ CFWS authres-version ]
              ( no-result / 1*resinfo ) [CFWS] CRLF

And then we could have:

   arc-authres-header = "ARC-Authentication-Results:" [CFWS] arc-info
authres-payload


--Kurt
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