[DNSOP] RFC 2845bis and HMAC-MD5

Martin Hoffmann <martin@opennetlabs.com> Thu, 14 March 2019 14:53 UTC

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Date: Thu, 14 Mar 2019 15:53:24 +0100
From: Martin Hoffmann <martin@opennetlabs.com>
To: dnsop@ietf.org
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Organization: Open Netlabs
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Subject: [DNSOP] RFC 2845bis and HMAC-MD5
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Hi,

when looking over draft-ietf-dnsop-rfc2845bis I was hoping that it
would relax the mandatory requirement for HMAC-MD5, but no such luck.

Given that most protocols have either made MD5 optional or banned it
outright, some modern crypto libraries have decided to drop it from
their supported algorithms. It seems to me that forcing new code to
include dependencies for MD5 is unnecessary.

As such, I would like to propose to move HMAC-MD5 to optional and only
retain SHA-1 and SHA-256 as mandatory.

Kind regards,
Martin