[Curdle] Looking for comments on draft-ietf-curdle-ssh-kex-sha2

"Mark D. Baushke" <mdb@juniper.net> Wed, 05 August 2020 16:57 UTC

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To: <curdle@ietf.org>
From: "Mark D. Baushke" <mdb@juniper.net>
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Date: Wed, 5 Aug 2020 09:57:06 -0700
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Archived-At: <https://mailarchive.ietf.org/arch/msg/curdle/i0RuHklwDK75kHI9l95Attdun9Q>
Subject: [Curdle] Looking for comments on draft-ietf-curdle-ssh-kex-sha2
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Hi,

Before IETF-108, I uploaded a new edition of

  Key Exchange (KEX) Method Updates and Recommendations for Secure Shell (SSH)
  https://datatracker.ietf.org/doc/draft-ietf-curdle-ssh-kex-sha2/

with the hope of

  a) Providing a survey of existing IANA Secure Shell (SSH) Protocol
     Parameters for Key Exchange Method Names
     https://www.iana.org/assignments/ssh-parameters/ssh-parameters.xhtml#ssh-parameters-16

  b) identifying a KEX to replace the current MUST implement exchanges:

       diffie-hellman-group1-sha1
       diffie-hellman-group14-sha1

  c) the desire to be deprecate any KEX which use sha1 as the secure hash:

       diffie-hellman-group-exchange-sha1
       diffie-hellman-group1-sha1
       diffie-hellman-group14-sha1
       gss-group1-sha1-*
       gss-group14-sha1-*
       gss-gex-sha1-*
       rsa1024-sha1

  d) A desire that the IANA KEX parameters contain another column in the
     table to indicate MUST, SHOULD, SHOULD NOT, MUST NOT, and MAY.

I have tried to indicate general guidance for the rest of the Method
Names, but many of the guidelines may be my personal opinion even though
I have tried to be objective throughout.

In my private copy, I have converted from v2 of the xmlrfc directives to
v3 and that will be part of the next revision.

I would very much like to hear any comments about the current draft.

	Be safe, stay healthy,
	-- Mark