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

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That sounds fine and addresses the minor concern that the previous language may have been a bit too specific. Thanks.

 

From: Mingliang Pei <mingliang.pei@xxxxxxxxxxxx>
Date: Monday, April 11, 2022 at 2:29 PM
To: Carl Wallace <carl@xxxxxxxxxxxxxxxxxxxx>
Cc: Russ Housley <housley@xxxxxxxxxxxx>, "art@xxxxxxxx" <art@xxxxxxxx>, "last-call@xxxxxxxx" <last-call@xxxxxxxx>, "teep@xxxxxxxx" <teep@xxxxxxxx>, "draft-ietf-teep-architecture.all@xxxxxxxx" <draft-ietf-teep-architecture.all@xxxxxxxx>, Hannes Tschofenig <Hannes.Tschofenig@xxxxxxx>
Subject: Re: [Teep] [Last-Call] Artart last call review of draft-ietf-teep-architecture-16

 

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 <carl@xxxxxxxxxxxxxxxxxxxx> wrote:

 

From: TEEP <teep-bounces@xxxxxxxx> on behalf of Mingliang Pei <mingliang.pei=40broadcom.com@xxxxxxxxxxxxxx>
Date: Thursday, April 7, 2022 at 8:40 PM
To: Russ Housley <housley@xxxxxxxxxxxx>
Cc: Mingliang Pei <mingliang.pei=40broadcom.com@xxxxxxxxxxxxxx>, "art@xxxxxxxx" <art@xxxxxxxx>, "last-call@xxxxxxxx" <last-call@xxxxxxxx>, "teep@xxxxxxxx" <teep@xxxxxxxx>, "draft-ietf-teep-architecture.all@xxxxxxxx" <draft-ietf-teep-architecture.all@xxxxxxxx>, Hannes Tschofenig <Hannes.Tschofenig@xxxxxxx>
Subject: Re: [Teep] [Last-Call] Artart last call review of draft-ietf-teep-architecture-16

 

 

[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.

 

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