Re: [DNSOP] on staleness of code points and code (mentions MD5 commentary from IETF98)

Evan Hunt <each@isc.org> Tue, 28 March 2017 15:05 UTC

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Date: Tue, 28 Mar 2017 15:05:03 +0000
From: Evan Hunt <each@isc.org>
To: Tony Finch <dot@dotat.at>
Cc: Jan =?utf-8?B?VsSNZWzDoWs=?= <jv@fcelda.cz>, "dnsop@ietf.org" <dnsop@ietf.org>, Paul Vixie <paul@redbarn.org>
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Subject: Re: [DNSOP] on staleness of code points and code (mentions MD5 commentary from IETF98)
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On Tue, Mar 28, 2017 at 03:36:40PM +0100, Tony Finch wrote:
> Chris Thompson just mentioned to me another reason for dropping support
> for RSAMD5: it uses a different DNSKEY tag calculation, which implies that
> dropping support should simplify validators more than dropping other
> algorithms.

To be clear, for the benfit of those not in the room yesterday, I do *not*
object to deprecating RSAMD5, I agree with the "MUST NOT" in the signer
column, and that it's pointless to support it in new validator
implementations.

My problem is with elevating "pointless" to the force of a "MUST NOT".  I
think it should be reduced in force to "OPTIONAL", "NOT RECOMMENDED", or
even "SHOULD NOT".  Kill it on the supply side.

-- 
Evan Hunt -- each@isc.org
Internet Systems Consortium, Inc.