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Re: [babel] Packet trailer [was: Some open HMAC issues]

David Schinazi <dschinazi@apple.com> Sun, 15 July 2018 14:47 UTC

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From: David Schinazi <dschinazi@apple.com>
In-reply-to: <87bmb8hbbv.wl-jch@irif.fr>
Date: Sun, 15 Jul 2018 10:47:51 -0400
Cc: Weronika Kołodziejak <weronika.kolodziejak@gmail.com>, Toke Høiland-Jørgensen <toke@toke.dk>, Clara Dô <clarado_perso@yahoo.fr>, babel@ietf.org
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References: <87sh545st3.wl-jch@irif.fr> <87bmbb9jyw.fsf@toke.dk> <87sh4luzrn.wl-jch@irif.fr> <F3E0FEA4-90AB-4EDF-B814-1E748868CC6C@apple.com> <87bmb8hbbv.wl-jch@irif.fr>
To: Juliusz Chroboczek <jch@irif.fr>
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Subject: Re: [babel] Packet trailer [was: Some open HMAC issues]
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That's fine by me.

David


> On Jul 15, 2018, at 09:34, Juliusz Chroboczek <jch@irif.fr> wrote:
> 
>>> That's what I think too, but David disagreed last time I asked him.
>>> Since you agree with me, I think I'm going to insist on this one.
> 
>> I didn't disagree. My point was that I wasn't bothered by the
>> zero out / hash / rewrite hash dance. But packet trailer is fine by me.
> 
> Appendix A.  Use of the packet trailer
> 
>   The protocol described in this document uses the packet trailer for
>   storing HMAC TLVs.  RFC 6126bis [RFC6126bis] leaves the format of the
>   packet trailer undefined.  If the final version of this specification
>   uses the packet trailer, RFC 6126bis will need to be extended with
>   information about the format of the packet trailer.
> 
>   This document assumes that the packet trailer has the same format as
>   the packet body, i.e., that it consists of a sequence of TLVs.  The
>   receiver MUST silently ignore any TLV found in the packet trailer
>   unless its definition states that the TLV is allowed in the packet
>   trailer.
> 
> Do y'all think we can achieve some sort of consensus on that, so I can go
> update 6126bis?
> 
> -- Juliusz
> 
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> babel@ietf.org
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