Re: [ietf-provreg] Anyone working on 4310-bis?

[Andrew Sullivan <ajs@shinkuro.com>]

On Tue, Oct 27, 2009 at 09:31:10PM +0100, Patrik Fältström wrote:
> We use epp and DNSSEC in .SE since a while back. What are the issues you 
> think?

Howard pointed out to me that the key tag is what is used to do
operations on a DS.  That's fine, until you're trying to roll
algorithms, because of this happy bit in RFC 4034:

   The key tag is the same for all DNSKEY algorithm types except
   algorithm 1 (please see Appendix B.1 for the definition of the key
   tag for algorithm 1).

One operational model for moving from SHA-1 to SHA-256 is to add a new
key using both SHA-1 and SHA-256, and then remove the SHA-1 version
after some time.  Now, one might want to say, "Don't do that," but I
think the document either ought to say that or else specify a way to
identify DS records that does not rely on the key tag.  Also, of
course, if there turned out to be a major problem with one or the
other algorithms, one would want a way to yank one of the keys without
yanking the other.  I haven't completely thought through this,
however.  The only way I know how really to think through something is
to write the text (I'm dim), so I thought I'd ask whether someone is
working on text.  If so, I could figure out how to add to it, or else
I could just write something new.

A

-- 
Andrew Sullivan
ajs@shinkuro.com
Shinkuro, Inc.
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