Re: [Last-Call] [Teep] Artart last call review of draft-ietf-teep-architecture-16

[Mingliang Pei <[e-mail]>]

Hi Carl,

Good point, thanks. A trust anchor intends to allow associated constraint
information, which is implementation specific, along with the main
underlying key material being a public key or a certificate. For the
revised definition, instead of allowing "other structure as appropriate",
how about we still call out the core key material being a "certificate or
public key", and other information along with them as appropriate? In other
words, how about the following?

The Trust Anchor may be a certificate or a raw public key with optionally
other constraint information or extensions. The structure of Trust Anchors
is implementation specific."

Thanks,

Ming


On Mon, Apr 11, 2022 at 6:08 AM Carl Wallace <[e-mail]>
wrote:

>
>
> *From: *TEEP <[e-mail]> on behalf of Mingliang Pei
> <mingliang.pei=[e-mail]>
> *Date: *Thursday, April 7, 2022 at 8:40 PM
> *To: *Russ Housley <[e-mail]>
> *Cc: *Mingliang Pei <mingliang.pei=[e-mail]>rg>, "
> [e-mail]" <[e-mail]>rg>, "[e-mail]" <[e-mail]>rg>, "
> [e-mail]" <[e-mail]>rg>, "[e-mail]"
> <[e-mail]>rg>, Hannes Tschofenig <
> [e-mail]>
> *Subject: *Re: [Teep] [Last-Call] Artart last call review of
> draft-ietf-teep-architecture-16
>
>
>
> See PR: https://github.com/ietf-teep/architecture/pull/236, thanks, Ming
>
>
>
> [CW] Is it a certainty that constraints will not be needed for trust
> anchors? The trust anchor definition references “associated data”, which
> would be used constrain use of the trust anchor. An option other than
> certificate or public key may would be needed if constraints may be defined
> (because constraints can’t be added to the certificate without breaking the
> signature and a raw public key has no means to express constraints).
> Perhaps, "The Trust Anchor may be a certificate, a raw public key or other
> structure, as appropriate." might be better to leave open the possibility
> of constraining a trust anchor. RFC5914 defines syntax that allows for
> associated data to be packaged alongside a public key or a certificate, as
> an example of an alternative.
>
>
>
> <snip>
>

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