Re: [Emu] [core] [Ace] Proposed charter for ACE (EAP over CoAP?)

[[e-mail]]

I support this; although I am curious in Dan’s opinion as to whether GSS on
top of CoAP is also worth considering, as a way of leveraging the GSS EAP
and other mechanisms (such as Kerberos).

 

Josh

 

From: Emu <[e-mail]> On Behalf Of Göran Selander
Sent: 07 December 2020 14:08
To: Laurent Toutain <[e-mail]>; Daniel Migault
<daniel.migault=[e-mail]>
Cc: EMU WG <[e-mail]>; [e-mail] WG ([e-mail]) <[e-mail]>;
[e-mail]
Subject: Re: [Emu] [core] [Ace] Proposed charter for ACE (EAP over CoAP?)

 

+1. 

 

(The recently updated ACE charter should cover this work.)

 

Göran

 

On 2020-12-03, 20:03, "core" <[e-mail]
<mailto:[e-mail]> > wrote:

Hi,

I think it is important to have EAP on top of CoAP, as Dan said it fit well
with the last charter item.

 

Laurent

 

 

On Thu, Dec 3, 2020 at 2:20 PM Daniel Migault
<daniel.migault=[e-mail]
<mailto:daniel.migault=[e-mail]> > wrote:

 

 

CCing emu, core

 

It seems ACE to me that ACE could be home for such a document. I am
wondering if emu core or any other WG believe there is a better place for
it. 

 

Regarding ACE I am wondering what is the WG opinion about adding this item
to the ACE charter. 

 

Yours, 

Daniel

________________________________________

From: Ace <[e-mail] <mailto:[e-mail]> > on behalf of
Dan Garcia <[e-mail] <mailto:[e-mail]> >

Sent: Thursday, December 3, 2020 6:10 AM

To: [e-mail] <mailto:[e-mail]>  <[e-mail] <mailto:[e-mail]>
>

Subject: [Ace] Proposed charter for ACE (EAP over CoAP?)  

 

Dear all:

 

Regarding the new charter, since ACE is considering the definition of CoAP
transport for CMPv2
(https://tools.ietf.org/html/draft-msahni-ace-cmpv2-coap-transport-00), we
were wondering whethere it could also consider specifying EAP (Extensible
Authentication Protocol) over CoAP.

 

In this sense, we proposed this some time ago and we have implementations
about this.

 

https://datatracker.ietf.org/doc/html/draft-marin-ace-wg-coap-eap-06

https://www.mdpi.com/1424-8220/16/3/358

https://www.mdpi.com/1424-8220/17/11/2646

 

The usage of CoAP can provide a very light and link-layer independent (we
even tested in LoRa networks) EAP lower-layer (transport for EAP) suitable
for IoT enviroment. We believe this would be really useful since EAP
provides flexibility for the authentication and it is a well-known protocol.

 

Therefore, we would like to propose the following modification to the
charter:

 

"The Working Group will examine how to use Constrained Application Protocol
(CoAP) as a transport medium for certificate enrollment protocols, such as
EST and CMPv2, as well as a transport for authentication protocols such as
EAP, and standardize them as needed."

 

This modification does not necessarily mean the adoption of our draft. After
all, we completely understand that this would happen only if there is an
interest in the WG. Nevertheless, we would like to avoid that the charter is
a barrier later if there is interest in the WG to work in this transport of
EAP over CoAP:

 

Any opinion about this?

 

Best Regards.

 

El 18/11/2020 a las 8:08, Daniel Migault escribió:

 

 

Hi,  

Please find the proposed charter we agreed on during the interim meeting. If
you would like to propose any change, please use the following URL by
November 25:

 

https://docs.google.com/document/d/1RtxUSvUeBdZWoQkjSj2c3DtR8DuBwPM2BnBXhoDi
ptY/edit?usp=sharing
<https://protect2.fireeye.com/v1/url?k=f9dc6551-a6475d83-f9dc25ca-866132fe44
5e-9c25a5c257a23470
<https://protect2.fireeye.com/v1/url?k=f9dc6551-a6475d83-f9dc25ca-866132fe44
5e-9c25a5c257a23470&q=1&e=03ce3af5-6990-40e0-b2b5-255ac5f5dfe0&u=https%3A%2F
%2Fdocs.google.com%2Fdocument%2Fd%2F1RtxUSvUeBdZWoQkjSj2c3DtR8DuBwPM2BnBXhoD
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&q=1&e=03ce3af5-6990-40e0-b2b5-255ac5f5dfe0&u=https%3A%2F%2Fdocs.google.com%
2Fdocument%2Fd%2F1RtxUSvUeBdZWoQkjSj2c3DtR8DuBwPM2BnBXhoDiptY%2Fedit%3Fusp%3
Dsharing>

 

 

Yours, 

Daniel

 

The Authentication and Authorization for Constrained Environments (ace) WG
has defined a standardized solution framework for authentication and
authorization to enable authorized access to resources identified by a URI
and hosted on a resource server in constrained environments. 

The access to the resource is mediated by an authorization server, which is
not considered to be constrained.

 

Profiles of this framework for application to security protocols commonly
used in constrained environments, including CoAP+DTLS and CoAP+OSCORE, have
also been standardized.  The Working Group is charged with maintenance of
the framework and existing profiles thereof, and may undertake work to
specify profiles of the framework for additional secure communications
protocols and for additional support services providing authorized access to
crypto keys (that are not necessarily limited to constrained endpoints,
though the focus remains on deployment in ecosystems with a substantial
portion of constrained devices).

 

In addition to the ongoing maintenance work, the Working Group will extend
the framework as needed for applicability to group communications, with
initial focus on (D)TLS and (Group) OSCORE as the underlying group
communication security protocols. The Working Group will standardize
procedures for requesting and distributing group keying material using the
ACE framework as well as appropriated management interfaces. 

 

The Working Group will standardize a format for expressing authorization
information for a given authenticated principal as received from an
authorization manager. 

 

The Working Group will examine how to use Constrained Application Protocol
(CoAP) as a transport medium for certificate enrollment protocols, such as
EST and CMPv2, and standardize as needed.

 

 

 

 

On Tue, Nov 17, 2020 at 6:47 PM Benjamin Kaduk <[e-mail]
<mailto:[e-mail]> > wrote:

 

 

Thanks for updating the draft charter at [1], Daniel!

 

I note that Michael raised the question of whether some other group might

also be interested in working on CMP-over-coap, so the IESG will be sure to

discuss that if CMP is still in the draft ACE charter when it goes to the

IESG for review.

 

-Ben

 

On Tue, Nov 17, 2020 at 06:16:48PM -0500, Daniel Migault wrote:

> Thank you all for the feed backs. For the purpose of driving the charter

> discussion at the IETf 109, I have added the comments into the proposed

> text [1].

> 

> My current understanding is that it seems beneficial to add CMPv2 over
CoAP

> in the charter. I am happy to be contradicted.

> * I have not seen a clear cut to do one or the other.

> * EST and CMPv2 are two protocols that can be used for enrollment or cert

> management while addressing different cases / needs / situations -- maybe

> we can clarify that point. I can see leveraging the existing CMP

> infrastructure, but it seems that is not the only one.

> * I am not convinced that not having CMP over CoAP will not prevent its

> deployment and as such I prefer to have it standardized - this might be a

> personal thought.

> * Adding any piece of work require cycles, but it seems to me that CPM
will

> not have a major impact on the WG progress. The work will probably include

> other WG such a LAMPS.

> 

> Yours,

> Daniel

> 

> [1]

>
https://docs.google.com/document/d/1RtxUSvUeBdZWoQkjSj2c3DtR8DuBwPM2BnBXhoDi
ptY/edit?usp=sharing
<https://protect2.fireeye.com/v1/url?k=a01e017d-ff8539af-a01e41e6-866132fe44
5e-7268e18ca0e30ad7
<https://protect2.fireeye.com/v1/url?k=a01e017d-ff8539af-a01e41e6-866132fe44
5e-7268e18ca0e30ad7&q=1&e=03ce3af5-6990-40e0-b2b5-255ac5f5dfe0&u=https%3A%2F
%2Fdocs.google.com%2Fdocument%2Fd%2F1RtxUSvUeBdZWoQkjSj2c3DtR8DuBwPM2BnBXhoD
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2Fdocument%2Fd%2F1RtxUSvUeBdZWoQkjSj2c3DtR8DuBwPM2BnBXhoDiptY%2Fedit%3Fusp%3
Dsharing>

> 

> On Tue, Nov 17, 2020 at 6:02 PM Daniel Migault <[e-mail]
<mailto:[e-mail]> > wrote:

> 

> > Hi Goran,

> >

> > I added the text to the charter we will discuss later.

> >

> > Yours,

> > Daniel

> >

> > On Fri, Nov 13, 2020 at 10:26 AM Göran Selander <

> > [e-mail] <mailto:[e-mail]> >
wrote:

> >

> >> Hi Daniel,

> >>

> >>

> >>

> >> Here’s another input to the charter.

> >>

> >>

> >>

> >> The current group key management solutions addresses the problem of

> >> authorized access to group keys and public keys of group members.

> >>

> >>

> >>

> >> A related problem is authorized access of public keys of other devices

> >> not necessarily part of a security group, in the sense of sharing a

> >> symmetric key used to protect group messages.

> >>

> >>

> >>

> >> Authorized access to raw public keys serves an important function in

> >> constrained settings where public key certificates may not be feasible
due

> >> to the incurred overhead, e.g. for when authenticating using EDHOC

> >> (draft-ietf-lake-edhoc).

> >>

> >> This functionality is thus a subset of what is already supported, but

> >> since the current solution is geared towards groups a different
solution

> >> may be needed (although it is probably possible to reuse parts from the

> >> existing schemes for provisioning and requesting public keys).

> >>

> >>

> >>

> >> With this in mind, I propose the following change (highlighted in

> >> boldface below):

> >>

> >>

> >>

> >> OLD

> >>

> >> The Working Group is charged with maintenance of the framework and

> >> existing profiles thereof, and may undertake work to specify profiles
of

> >> the framework for additional secure communications protocols (that are
not

> >> necessarily limited to constrained endpoints, though the focus remains
on

> >> deployment ecosystems with a substantial portion of constrained
devices).

> >>

> >>

> >>

> >> NEW

> >>

> >> The Working Group is charged with maintenance of the framework and

> >> existing profiles thereof, and may undertake work to specify profiles
of

> >> the framework for additional secure communications protocols *and **for

> >> additional **support services **providing* *authorized access to
crypto* *keys

> >> *(that are not necessarily limited to constrained endpoints, though the

> >> focus remains on deployment ecosystems with a substantial portion of

> >> constrained devices).

> >>

> >>

> >>

> >> Göran

> >>

> >>

> >>

> >>

> >>

> >>

> >>

> >> On 2020-10-15, 19:50, "Ace" <[e-mail]
<mailto:[e-mail]> > wrote:

> >>

> >> Hi,

> >>

> >> I would like to start the charter discussion. Here is a draft of a

> >> proposed charter [1].

> >>

> >>

> >>

> >> It seems to be that additional discussion is needed with regard to the

> >> last paragraph related certificate management. In particular the
discussion

> >> might revive a discussion that happened in 2017 [2] - when I was not

> >> co-chair of ACE -and considered other expired work such as [3]. Please
make

> >> this discussion constructive on this thread.

> >>

> >>

> >>

> >> The fundamental question is whether we need certificate management at

> >> this stage. If the answer is yes, and we have multiple proposals, it
would

> >> be good to clarify the position of the different proposals and evaluate

> >> whether a selection is needed or not before validating the charter.

> >>

> >>

> >>

> >> Please provide your inputs on the mailing list before October 30. Of

> >> course for minor edits, you may suggest them directly on the google
doc.

> >>

> >>

> >>

> >> Yours,

> >>

> >> Daniel

> >>

> >>

> >>

> >> [1]

> >>
https://docs.google.com/document/d/1RtxUSvUeBdZWoQkjSj2c3DtR8DuBwPM2BnBXhoDi
ptY/edit?usp=sharing
<https://protect2.fireeye.com/v1/url?k=2eaaeb96-7131d344-2eaaab0d-866132fe44
5e-7e515f25c81762b8
<https://protect2.fireeye.com/v1/url?k=2eaaeb96-7131d344-2eaaab0d-866132fe44
5e-7e515f25c81762b8&q=1&e=03ce3af5-6990-40e0-b2b5-255ac5f5dfe0&u=https%3A%2F
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iptY%2Fedit%3Fusp%3Dsharing>
&q=1&e=03ce3af5-6990-40e0-b2b5-255ac5f5dfe0&u=https%3A%2F%2Fdocs.google.com%
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Dsharing>

> >> <

> >>
https://protect2.fireeye.com/v1/url?k=4f3d9c3b-118c475b-4f3ddca0-86e2237f51f
b-627e48b069462d70
<https://protect2.fireeye.com/v1/url?k=4f3d9c3b-118c475b-4f3ddca0-86e2237f51
fb-627e48b069462d70&q=1&e=6924b2a6-e7e5-4ec1-a1af-c94637953dc5&u=https%3A%2F
%2Fdocs.google.com%2Fdocument%2Fd%2F1RtxUSvUeBdZWoQkjSj2c3DtR8DuBwPM2BnBXhoD
iptY%2Fedit%3Fusp%3Dsharing>
&q=1&e=6924b2a6-e7e5-4ec1-a1af-c94637953dc5&u=https%3A%2F%2Fdocs.google.com%
2Fdocument%2Fd%2F1RtxUSvUeBdZWoQkjSj2c3DtR8DuBwPM2BnBXhoDiptY%2Fedit%3Fusp%3
Dsharing>

> >>

> >>

> >> [2]

> >>
https://datatracker.ietf.org/doc/minutes-interim-2017-ace-03-201710191300/

> >>

> >> [3] https://datatracker.ietf.org/doc/draft-selander-ace-eals/

> >>

> >>

> >>

> >> --

> >>

> >> Daniel Migault

> >>

> >>

> >>

> >> Ericsson

> >>

> >

> >

> > --

> > Daniel Migault

> > Ericsson

> >

> 

> 

> -- 

> Daniel Migault

> Ericsson

 

> _______________________________________________

> Ace mailing list

> [e-mail] <mailto:[e-mail]> 

> https://www.ietf.org/mailman/listinfo/ace

 

_______________________________________________

Ace mailing list

[e-mail] <mailto:[e-mail]> 

https://www.ietf.org/mailman/listinfo/ace

 

 

 

 

 

-- 

Daniel Migault

 

Ericsson

 

 

 

 

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-- 

Laurent Toutain 

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