Re: [Rats] EAT claims needed by TEEP

Laurence Lundblade <lgl@island-resort.com> Wed, 10 November 2021 21:25 UTC

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From: Laurence Lundblade <lgl@island-resort.com>
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Date: Wed, 10 Nov 2021 13:25:40 -0800
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Cc: Michael Richardson <mcr+ietf@sandelman.ca>, "rats@ietf.org" <rats@ietf.org>, teep <teep@ietf.org>
To: Dave Thaler <dthaler@microsoft.com>
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Subject: Re: [Rats] EAT claims needed by TEEP
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An advantage of a string over a UUID is that it can be very short if that’s all the OEM needs, “S”, “3, “X” and “Y” in the case of Tesla.

LL

> On Nov 10, 2021, at 1:03 PM, Dave Thaler <dthaler@microsoft.com> wrote:
> 
> If it's a string, I think it should be up to the vendor specified by the oemid,
> rather than by a vendor-agnostic profile.
> If it's a UUID then that's not needed.
> 
> Personally I would argue for treating it as opaque in either case
> and a verifier should only compare it for equality, rather than permitting
> semantic structure in it.   That's because I think some hardware implementation
> may fillvin values that can be used for multiple profiles.
> 
> Dave
> 
> -----Original Message-----
> From: RATS <rats-bounces@ietf.org <mailto:rats-bounces@ietf.org>> On Behalf Of Michael Richardson
> Sent: Wednesday, November 10, 2021 12:23 PM
> To: Laurence Lundblade <lgl@island-resort.com <mailto:lgl@island-resort.com>>; rats@ietf.org <mailto:rats@ietf.org>; teep <teep@ietf.org <mailto:teep@ietf.org>>
> Subject: Re: [Rats] EAT claims needed by TEEP
> 
> 
> Laurence Lundblade <lgl@island-resort.com> wrote:
>> Appreciate the comments.  Think it is important to keep this generic
>> since it is going in EAT. TEEP can have specific ways it uses HW class,
>> but don't think we should be referencing TEEP in EAT.
> 
> Then I suggest that:
> 
>     "There is no global scheme or format for this claim."
> ->
>     "The format for this scheme will need to be specified within profiles that
>      use it."
> 
> --
> ]               Never tell me the odds!                 | ipv6 mesh networks [
> ]   Michael Richardson, Sandelman Software Works        | network architect  [
> ]     mcr@sandelman.ca <mailto:mcr@sandelman.ca>  https://nam06.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.sandelman.ca%2F&amp;data=04%7C01%7Cdthaler%40microsoft.com%7C47461df1d4ae4c6cc7f208d9a487f27c%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C637721726675767230%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&amp;sdata=%2BOIH8fZw6zju18DcoR9hQ4HkrtDsMkhTXwQTitkKsSQ%3D&amp;reserved=0 <https://nam06.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.sandelman.ca%2F&amp;data=04%7C01%7Cdthaler%40microsoft.com%7C47461df1d4ae4c6cc7f208d9a487f27c%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C637721726675767230%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&amp;sdata=%2BOIH8fZw6zju18DcoR9hQ4HkrtDsMkhTXwQTitkKsSQ%3D&amp;reserved=0>        |   ruby on rails    [
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> 
> --
> Michael Richardson <mcr+IETF@sandelman.ca <mailto:mcr+IETF@sandelman.ca>>, Sandelman Software Works  -= IPv6 IoT consulting =-