Re: [saag] Using ED25519 in SSHFP Resource Records - draft-moonesamy-sshfp-ed25519-00

Paul Wouters <pwouters@redhat.com> Mon, 24 February 2014 03:10 UTC

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Date: Sun, 23 Feb 2014 22:09:57 -0500
From: Paul Wouters <pwouters@redhat.com>
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Subject: Re: [saag] Using ED25519 in SSHFP Resource Records - draft-moonesamy-sshfp-ed25519-00
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On 02/23/2014 02:03 PM, Stephen Farrell wrote:
> 
> Thanks for reviewing this Yoav.
> 
> SM's been (quite properly) hassling me to figure out what
> to do with his draft and I've been slow because I don't
> want to do something that turns out to be in conflict with
> whatever is done in TLS in particular.
> 
> I'd be interested in opinions as to whether that is a real
> problem or not.

I agree with Yoav that we really should not write new documents that specify SHA1.

Other small items regarding the draft:

	RFC 4255 [RFC4255] defines a new DNS resource record, "SSHFP",

I would remove the word "new". It just defines it. And I would argue that 2006 is not "new".

I would not mention client behaviour in section 2 introduction, but instead just define the new IANA entry and refer to RFC 4255 Section 2 for the usage policy.

I would also remove the introduction paragraph of section 3 and just refer back to 4255 using those last two lines.

Can this document also add an SSHFP Algorithm Number for ECDSA?

Can this document be changed to add the SHA2-256 fingerprint type in general for all algorithms? That way, the RSA and DSS defined Algorithm Numbers can also
switch from SHA1 to SHA2-256.

Paul