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Re: [Dcrup] rsa-sha1 usage

denis bider <denisbider.ietf@gmail.com> Wed, 14 June 2017 08:32 UTC

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From: denis bider <denisbider.ietf@gmail.com>
Date: Wed, 14 Jun 2017 02:31:58 -0600
Message-ID: <CADPMZDALpS_OAm5o3qTOW2t_Qpeyuf-AkQqVPGKTO1kbefstWQ@mail.gmail.com>
To: Phillip Hallam-Baker <phill@hallambaker.com>
Cc: "Murray S. Kucherawy" <superuser@gmail.com>, dcrup@ietf.org, Scott Kitterman <sklist@kitterman.com>
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Subject: Re: [Dcrup] rsa-sha1 usage
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Overall, I think there is currently too much being said on this list, and
too little substance in it. However, to the extent that a decision is to be
made, I support Phillip's below reasoning.

+1.


On Tue, Jun 13, 2017 at 8:11 PM, Phillip Hallam-Baker <phill@hallambaker.com
> wrote:

> On Tue, Jun 13, 2017 at 9:40 PM, Murray S. Kucherawy
> <superuser@gmail.com> wrote:
> > On Tue, Jun 13, 2017 at 8:43 AM, Scott Kitterman <sklist@kitterman.com>
> > wrote:
> >>
> >> I think your proposed remedy is too mild though.  Given the degree to
> >> which the SHOULD NOT sign rsa-sha1 has been ignored for the last
> decade, I
> >> don't believe anything other than MUST NOT sign/MUST NOT verify
> rsa-sha1 is
> >> very useful.
> >
> >
> > That being the case, why do we think people will pay attention to a MUST
> NOT
> > today?
>
> MUST NOT sign is perfectly viable and proper and will be followed by
> anything that has the right to call itself compliant with the new
> spec.
>
> MUST NOT verify is not supported by the state of the crypto and is
> guaranteed to be ignored. It is an utterly illogical criteria since
> there is no requirement to sign at all.
>
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> Dcrup@ietf.org
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