I worked out this suggestion into a PR:
https://github.com/tlswg/draft-ietf-tls-esni/pull/276
Please have a look!
Chris P.
On Mon, Aug 17, 2020 at 4:28 PM Martin Thomson <m...@lowentropy.net> wrote:
>
>
> On Tue, Aug 18, 2020, at 09:04, Christopher Patton wrote:
> > Just to be clear, you're proposing something like this? Referring to
> > the KDF API called for in draft-irtf-cfrg-hpke-05:
> >
> > config_digest = Expand(PRK=Extract("some_salt", "some_label",
> > IKM=config), "some_info", 16)
> > It's maybe more hashing than necessary, but I'd be good with this.
>
> Something like that yeah. And yes, that's a lot of hashing. But that's a
> lower-order concern. Maybe if we try to find a KDF that doesn't cost so
> much to operate we won't feel so bad about this.
>
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