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From: Ludwig Seitz <ludwig.seitz@ri.se>
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Subject: Re: [Ace] CWT - Scope Claim
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On 2017-10-31 16:06, Jim Schaad wrote:
> I have an outstanding comment to the effect that I want a binary scope 
> value – specifically to allow for a CBOR encoded object – on the 
> framework document.

Fixed in the editor's draft. Will submit an update soon.

(See: https://github.com/ace-wg/ace-oauth/issues/122)

/Ludwig


-- 
Ludwig Seitz, PhD
Security Lab, RISE SICS
Phone +46(0)70-349 92 51


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From: Ludwig Seitz <ludwig.seitz@ri.se>
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Hello ACE,

just a heads-up to tell you that thanks to Francesca we now have an ACE 
github organization here:  https://github.com/ace-wg

This contains the following drafts:

draft-ietf-ace-dtls-authorize
draft-ietf-ace-oauth-authz
draft-ietf-ace-actors


You can follow the editors' progress on these drafts (between 
submissions) through the "Editor's copy" links on the sub-pages, and 
also submit issues and pull requests.

/Ludwig

-- 
Ludwig Seitz, PhD
Security Lab, RISE SICS
Phone +46(0)70-349 92 51


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From: Samuel Erdtman <samuel@erdtman.se>
Date: Wed, 1 Nov 2017 13:05:52 +0100
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To: Mike Jones <Michael.Jones@microsoft.com>
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Subject: Re: [Ace] CWT - Scope Claim
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+1

CWT should not add claims.

I also created an issue to register the claim with JWT.

On Tue, Oct 31, 2017 at 9:08 PM, Mike Jones <Michael.Jones@microsoft.com>
wrote:

> I agree that CWT shouldn't define claims beyond those that correspond to
> the JWT claims.  Other specs can do that via the registry established for
> that purpose.
>
> -- Mike
> ------------------------------
> *From:* Ace <ace-bounces@ietf.org> on behalf of Jim Schaad <
> ietf@augustcellars.com>
> *Sent:* Tuesday, October 31, 2017 8:06:04 AM
> *To:* Hannes Tschofenig; 'Samuel Erdtman'
>
> *Cc:* ace@ietf.org
> *Subject:* Re: [Ace] CWT - Scope Claim
>
>
> I have an outstanding comment to the effect that I want a binary scope
> value =E2=80=93 specifically to allow for a CBOR encoded object =E2=80=93=
 on the framework
> document.
>
>
>
> In terms of defining it in this document rather than in the framework, my
> first response would be =E2=80=98no=E2=80=99 only because this was design=
ed to be a direct
> copy of the JWT document and it was not defined there.  Other than that I
> would not care one way or the other.
>
>
>
> Jim
>
>
>
>
>
> *From:* Ace [mailto:ace-bounces@ietf.org] *On Behalf Of *Hannes Tschofeni=
g
> *Sent:* Tuesday, October 31, 2017 2:58 AM
> *To:* Samuel Erdtman <samuel@erdtman.se>
> *Cc:* ace@ietf.org
> *Subject:* Re: [Ace] CWT - Scope Claim
>
>
>
> Hi Samuel,
>
>
>
> You are correct that we should register it also with the JWT.
>
>
>
> Additionally, I wonder whether the string representation of the claim for
> the CWT is the most efficient way to represent the scope. Shouldn=E2=80=
=99t we
> rather use CBOR capabilities here since we are trying to optimize 2 bytes
> in other areas?
>
>
>
> Ciao
>
> Hannes
>
>
>
> *From:* Samuel Erdtman [mailto:samuel@erdtman.se <samuel@erdtman.se>]
> *Sent:* 31 October 2017 10:46
> *To:* Hannes Tschofenig
> *Cc:* ace@ietf.org
> *Subject:* Re: [Ace] CWT - Scope Claim
>
>
>
> The framework does register a CWT 'scoop' claim, but I think it has to
> register it with JWT too to be correct.
>
>
> https://tools.ietf.org/html/draft-ietf-ace-oauth-authz-08#section-8.5
>
>
>
> //Samuel
>
>
>
> On Tue, Oct 31, 2017 at 10:28 AM, Hannes Tschofenig <
> Hannes.Tschofenig@arm.com> wrote:
>
> Hi all,
>
>
>
> I was wondering whether we should define a claim, scope, that captures th=
e
> scope that was granted by the authorization server.
>
>
>
> Ciao
>
> Hannes
>
> IMPORTANT NOTICE: The contents of this email and any attachments are
> confidential and may also be privileged. If you are not the intended
> recipient, please notify the sender immediately and do not disclose the
> contents to any other person, use it for any purpose, or store or copy th=
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>
>
> _______________________________________________
> Ace mailing list
> Ace@ietf.org
> https://www.ietf.org/mailman/listinfo/ace
>
>
>
> IMPORTANT NOTICE: The contents of this email and any attachments are
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>

--089e082551ac7d27bc055ceab165
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<div dir=3D"ltr"><div><div>+1<br><br></div>CWT should not add claims.<br><b=
r></div>I also created an issue to register the claim with JWT.<br></div><d=
iv class=3D"gmail_extra"><br><div class=3D"gmail_quote">On Tue, Oct 31, 201=
7 at 9:08 PM, Mike Jones <span dir=3D"ltr">&lt;<a href=3D"mailto:Michael.Jo=
nes@microsoft.com" target=3D"_blank">Michael.Jones@microsoft.com</a>&gt;</s=
pan> wrote:<br><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex=
;border-left:1px #ccc solid;padding-left:1ex">






<div link=3D"blue" vlink=3D"purple" lang=3D"EN-US">
<div dir=3D"auto" style=3D"direction:ltr;margin:0;padding:0;font-family:san=
s-serif;font-size:11pt;color:black">
I agree that CWT shouldn&#39;t define claims beyond those that correspond t=
o the JWT claims.=C2=A0 Other specs can do that via the registry establishe=
d for that purpose.
<br>
<br>
</div>
<div dir=3D"auto" style=3D"direction:ltr;margin:0;padding:0;font-family:san=
s-serif;font-size:11pt;color:black">
-- Mike</div>
<hr style=3D"display:inline-block;width:98%">
<div id=3D"m_1871988212851670847divRplyFwdMsg" dir=3D"ltr"><font style=3D"f=
ont-size:11pt" color=3D"#000000" face=3D"Calibri, sans-serif"><b>From:</b> =
Ace &lt;<a href=3D"mailto:ace-bounces@ietf.org" target=3D"_blank">ace-bounc=
es@ietf.org</a>&gt; on behalf of Jim Schaad &lt;<a href=3D"mailto:ietf@augu=
stcellars.com" target=3D"_blank">ietf@augustcellars.com</a>&gt;<br>
<b>Sent:</b> Tuesday, October 31, 2017 8:06:04 AM<br>
<b>To:</b> Hannes Tschofenig; &#39;Samuel Erdtman&#39;<div><div class=3D"h5=
"><br>
<b>Cc:</b> <a href=3D"mailto:ace@ietf.org" target=3D"_blank">ace@ietf.org</=
a><br>
<b>Subject:</b> Re: [Ace] CWT - Scope Claim</div></div></font>
<div>=C2=A0</div>
</div><div><div class=3D"h5">
<div>
<div class=3D"m_1871988212851670847WordSection1">
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">I have an outstanding comment to the effect that I =
want a binary scope value =E2=80=93 specifically to allow for a CBOR encode=
d object =E2=80=93 on the framework document.</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">=C2=A0</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">In terms of defining it in this document rather tha=
n in the framework, my first response would be =E2=80=98no=E2=80=99 only be=
cause this was designed to be a direct copy of the JWT document
 and it was not defined there.=C2=A0 Other than that I would not care one w=
ay or the other.</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">=C2=A0</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">Jim</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">=C2=A0</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">=C2=A0</span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #e1e1e1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif">From:</span></b><span style=3D"font-size:11.0pt;=
font-family:&quot;Calibri&quot;,sans-serif"> Ace [mailto:<a href=3D"mailto:=
ace-bounces@ietf.org" target=3D"_blank">ace-bounces@ietf.org</a>]
<b>On Behalf Of </b>Hannes Tschofenig<br>
<b>Sent:</b> Tuesday, October 31, 2017 2:58 AM<br>
<b>To:</b> Samuel Erdtman &lt;<a href=3D"mailto:samuel@erdtman.se" target=
=3D"_blank">samuel@erdtman.se</a>&gt;<br>
<b>Cc:</b> <a href=3D"mailto:ace@ietf.org" target=3D"_blank">ace@ietf.org</=
a><br>
<b>Subject:</b> Re: [Ace] CWT - Scope Claim</span></p>
</div>
</div>
<p class=3D"MsoNormal">=C2=A0</p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d" lang=3D"EN-GB">Hi Samuel,
</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d" lang=3D"EN-GB">=C2=A0</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d" lang=3D"EN-GB">You are correct that w=
e should register it also with the JWT.
</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d" lang=3D"EN-GB">=C2=A0</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d" lang=3D"EN-GB">Additionally, I wonder=
 whether the string representation of the claim for the CWT is the most eff=
icient way to represent the scope. Shouldn=E2=80=99t we
 rather use CBOR capabilities here since we are trying to optimize 2 bytes =
in other areas?
</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d" lang=3D"EN-GB">=C2=A0</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d" lang=3D"EN-GB">Ciao</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d" lang=3D"EN-GB">Hannes</span></p>
<p class=3D"MsoNormal"><a name=3D"m_1871988212851670847__MailEndCompose"></=
a><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-seri=
f;color:#1f497d" lang=3D"EN-GB">=C2=A0</span></p>
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,sans-serif">From:</span></b><span style=3D"font-size:10.0pt;f=
ont-family:&quot;Tahoma&quot;,sans-serif"> Samuel Erdtman [<a href=3D"mailt=
o:samuel@erdtman.se" target=3D"_blank">mailto:samuel@erdtman.se</a>]
<br>
<b>Sent:</b> 31 October 2017 10:46<br>
<b>To:</b> Hannes Tschofenig<br>
<b>Cc:</b> <a href=3D"mailto:ace@ietf.org" target=3D"_blank">ace@ietf.org</=
a><br>
<b>Subject:</b> Re: [Ace] CWT - Scope Claim</span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB">=C2=A0</span></p>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-GB">The framework does register a C=
WT &#39;scoop&#39; claim, but I think it has to register it with JWT too to=
 be correct.</span></p>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-GB"><br>
<a href=3D"https://tools.ietf.org/html/draft-ietf-ace-oauth-authz-08#sectio=
n-8.5" target=3D"_blank">https://tools.ietf.org/html/<wbr>draft-ietf-ace-oa=
uth-authz-08#<wbr>section-8.5</a></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-GB">=C2=A0</span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-GB">//Samuel</span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-GB">=C2=A0</span></p>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-GB">On Tue, Oct 31, 2017 at 10:28 A=
M, Hannes Tschofenig &lt;<a href=3D"mailto:Hannes.Tschofenig@arm.com" targe=
t=3D"_blank">Hannes.Tschofenig@arm.com</a>&gt; wrote:</span></p>
<div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-GB">Hi all, </span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB">=C2=A0</span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB">I was wondering whether we shou=
ld define a claim, scope, that captures the scope that was granted by the a=
uthorization server.
</span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB">=C2=A0</span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB">Ciao</span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB">Hannes</span></p>
</div>
<p class=3D"MsoNormal"><span lang=3D"EN-GB">IMPORTANT NOTICE: The contents =
of this email and any attachments are confidential and may also be privileg=
ed. If you are not the intended recipient, please notify the sender immedia=
tely and do not disclose the contents
 to any other person, use it for any purpose, or store or copy the informat=
ion in any medium. Thank you.
</span></p>
</div>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span lang=3D"EN-GB">=
<br>
______________________________<wbr>_________________<br>
Ace mailing list<br>
<a href=3D"mailto:Ace@ietf.org" target=3D"_blank">Ace@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/ace" target=3D"_blank">htt=
ps://www.ietf.org/mailman/<wbr>listinfo/ace</a></span></p>
</div>
<p class=3D"MsoNormal"><span lang=3D"EN-GB">=C2=A0</span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif" lang=3D"EN-GB">IMPORTANT NOTICE: The contents of th=
is email and any attachments are confidential and may also be privileged. I=
f you are not the intended recipient, please notify
 the sender immediately and do not disclose the contents to any other perso=
n, use it for any purpose, or store or copy the information in any medium. =
Thank you.
</span></p>
</div>
</div>
</div>
</div></div></div>

</blockquote></div><br></div>

--089e082551ac7d27bc055ceab165--


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From: Kathleen Moriarty <kathleen.moriarty.ietf@gmail.com>
Date: Wed, 1 Nov 2017 11:00:20 -0400
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To: Ludwig Seitz <ludwig.seitz@ri.se>
Cc: "ace@ietf.org" <ace@ietf.org>
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Thank you, Francesca!

On Wed, Nov 1, 2017 at 4:02 AM, Ludwig Seitz <ludwig.seitz@ri.se> wrote:
> Hello ACE,
>
> just a heads-up to tell you that thanks to Francesca we now have an ACE
> github organization here:  https://github.com/ace-wg
>
> This contains the following drafts:
>
> draft-ietf-ace-dtls-authorize
> draft-ietf-ace-oauth-authz
> draft-ietf-ace-actors
>
>
> You can follow the editors' progress on these drafts (between submissions)
> through the "Editor's copy" links on the sub-pages, and also submit issues
> and pull requests.
>
> /Ludwig
>
> --
> Ludwig Seitz, PhD
> Security Lab, RISE SICS
> Phone +46(0)70-349 92 51
>
> _______________________________________________
> Ace mailing list
> Ace@ietf.org
> https://www.ietf.org/mailman/listinfo/ace



-- 

Best regards,
Kathleen


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Subject: [Ace] WGLC on draft-ietf-ace-cbor-web-token
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This message begins a working group last call for
draft-ietf-ace-cbor-web-token for submission as a Standards-Track RFC,
ending at 23:59 PST on Wednesday 29 November, 2017.

The current (-09) version of the document is available at:
https://tools.ietf.org/html/draft-ietf-ace-cbor-web-token-09 .

Thanks,

Ben and Jim


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From: Benjamin Kaduk <kaduk@mit.edu>
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Subject: Re: [Ace] WGLC on draft-ietf-ace-cbor-web-token
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On Wed, Nov 01, 2017 at 12:24:55PM -0500, Benjamin Kaduk wrote:
> This message begins a working group last call for
> draft-ietf-ace-cbor-web-token for submission as a Standards-Track RFC,
> ending at 23:59 PST on Wednesday 29 November, 2017.
> 
> The current (-09) version of the document is available at:
> https://tools.ietf.org/html/draft-ietf-ace-cbor-web-token-09 .

We will be treating Hannes' comment about the (lack of) multi-valued
audience as a WGLC comment.  I hope Mike did not need the extra
motivation of the WGLC to go through and make the comparison against JWT :)

-Ben


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From: Carsten Bormann <cabo@tzi.org>
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Date: Wed, 1 Nov 2017 18:33:59 +0100
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Subject: Re: [Ace] WGLC on draft-ietf-ace-cbor-web-token
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Just wondering:

Are you aware that this is a second WGLC?  You didn=E2=80=99t mention =
that.

(And do we really need four weeks for a second WGLC?  Even factoring in =
the IETF week?)

Gr=C3=BC=C3=9Fe, Carsten

> On Nov 1, 2017, at 18:24, Benjamin Kaduk <kaduk@mit.edu> wrote:
>=20
> This message begins a working group last call for
> draft-ietf-ace-cbor-web-token for submission as a Standards-Track RFC,
> ending at 23:59 PST on Wednesday 29 November, 2017.
>=20
> The current (-09) version of the document is available at:
> https://tools.ietf.org/html/draft-ietf-ace-cbor-web-token-09 .
>=20
> Thanks,
>=20
> Ben and Jim
>=20
> _______________________________________________
> Ace mailing list
> Ace@ietf.org
> https://www.ietf.org/mailman/listinfo/ace
>=20


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Date: Wed, 1 Nov 2017 12:41:06 -0500
From: Benjamin Kaduk <kaduk@mit.edu>
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Subject: Re: [Ace] WGLC on draft-ietf-ace-cbor-web-token
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On Wed, Nov 01, 2017 at 06:33:59PM +0100, Carsten Bormann wrote:
> Just wondering:
> 
> Are you aware that this is a second WGLC?  You didn’t mention that.

I was aware, sorry for not mentioning it.  (The first WGLC was on the -04.)

> (And do we really need four weeks for a second WGLC?  Even factoring in the IETF week?)

It spans a US holiday and an IETF meeting, so the extra time seemed warranted
given how many other distractions people may have.

-Ben


From nobody Thu Nov  2 05:04:47 2017
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To: "ace-chairs@ietf.org" <ace-chairs@ietf.org>
CC: "ace@ietf.org" <ace@ietf.org>
From: Ludwig Seitz <ludwig.seitz@ri.se>
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Subject: [Ace] IETF 100 presentation slot request
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Hello ACE chairs,

I'd like to request a ~15 minute slot to present the updates to 
draft-ietf-ace-oauth-authz at IETF 100. Currently the plan is to present 
remote, but I have backup on site in case there is network trouble.

I'm not sure how much discussion to expect. The presentation will be 
much shorter than 15 mins, the ensuing discussion might not.

Regards,

Ludwig
-- 
Ludwig Seitz, PhD
Security Lab, RISE SICS
Phone +46(0)70-349 92 51


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Date: Thu, 2 Nov 2017 21:47:29 -0500
From: Benjamin Kaduk <kaduk@mit.edu>
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Subject: Re: [Ace] IETF 100 presentation slot request
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Hi Ludwig,

On Thu, Nov 02, 2017 at 01:04:36PM +0100, Ludwig Seitz wrote:
> Hello ACE chairs,
> 
> I'd like to request a ~15 minute slot to present the updates to 
> draft-ietf-ace-oauth-authz at IETF 100. Currently the plan is to present 
> remote, but I have backup on site in case there is network trouble.
> 
> I'm not sure how much discussion to expect. The presentation will be 
> much shorter than 15 mins, the ensuing discussion might not.

Thanks for letting us know about the plan for remote presentation, which
of course requires additional prepartaion.  As things currently stand,
it seems likely that we can accomodate the request for agenda time.

-Ben


From nobody Sun Nov  5 09:37:20 2017
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From: Cigdem Sengul <cigdem.sengul@gmail.com>
Date: Sun, 5 Nov 2017 17:37:09 +0000
Message-ID: <CAA7SwCMZ5Uu1LUHBXH=Rg2yGbYXwrMx=uf6aEsKKKzq-DgH5XQ@mail.gmail.com>
To: Jim Schaad <ietf@augustcellars.com>
Cc: "ace@ietf.org" <ace@ietf.org>
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Subject: Re: [Ace] Question about the response to an unauthorized request
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--001a1147357096851e055d3fc93c
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In the case of rogue requestor being the client, it does not have
visibility into what is included in the permission ticket ( ticket is a
reference returned by rs to be presented at as). It may dos Rs with
requests, which rs may implement a solution like rate limiting (not
described in uma).

The as api for rs is protected via an oauth2 token (PAT) which rs must
present for permission registration (as well as for other functions). This
Pat allows as to map es=E2=80=99s request to a particular Ro. Rs can only a=
sk for
permissions for the resources and scopes it already registered with the As.

Hope I was able to clarify.

Thanks,
=E2=80=94Cigdem

On Wednesday, October 25, 2017, Jim Schaad <ietf@augustcellars.com> wrote:

> So you would be doing based on something like the address of the requesto=
r
> or the content of the request.  I would complete understand the first
> half.  Is there any way to prevent a rouge requestor from asking for
> information =E2=80=93 or are you just relying on a closed system?
>
>
>
> *From:* Cigdem Sengul [mailto:cigdem.sengul@gmail.com
> <javascript:_e(%7B%7D,'cvml','cigdem.sengul@gmail.com');>]
> *Sent:* Wednesday, October 25, 2017 2:19 PM
> *To:* Jim Schaad <ietf@augustcellars.com
> <javascript:_e(%7B%7D,'cvml','ietf@augustcellars.com');>>
> *Cc:* Ludwig Seitz <ludwig.seitz@ri.se
> <javascript:_e(%7B%7D,'cvml','ludwig.seitz@ri.se');>>; ace@ietf.org
> <javascript:_e(%7B%7D,'cvml','ace@ietf.org');>
> *Subject:* Re: [Ace] Question about the response to an unauthorized
> request
>
>
>
> UMA assumes that  resource server knows =E2=80=9Cwhich authorization serv=
er to
> approach for the permission ticket and on which resource owner's behalf=
=E2=80=9D
> deriving =E2=80=9Cthe necessary information using cues provided by the st=
ructure of
> the API where the resource request was made, rather than by an access
> token. =E2=80=9C
>
> On Wednesday, October 25, 2017, Jim Schaad <ietf@augustcellars.com
> <javascript:_e(%7B%7D,'cvml','ietf@augustcellars.com');>> wrote:
>
> How does the RS make an informed decision about who the client is given
> that it is a tokenless access request?
>
>
>
>
>
>
>
> *From:* Ace [mailto:ace-bounces@ietf.org] *On Behalf Of *Cigdem Sengul
> *Sent:* Wednesday, October 25, 2017 7:28 AM
> *To:* Ludwig Seitz <ludwig.seitz@ri.se>
> *Cc:* ace@ietf.org
> *Subject:* Re: [Ace] Question about the response to an unauthorized
> request
>
>
>
> Hello,
>
>
>
> To bring a different view, I wanted to mention Kantara UMA (User Managed
> Access) approach to this problem. (I participated in the UMA v2.0
> development this year, so had the chance to be more familiar with the new
> drafts.)
>
>
>
> In UMA,  the resource server must respond to a client's tokenless
> (unauthorized) access attempt by obtaining a permission ticket from the
> authorization server.
>
> If RS is able to obtain a permission ticket from the AS, RS returns this
> ticket to the client also with  the AS uri to aid AS discovery.
>
>
>
> UMA handles resources (resource sets, permissions etc.) differently but
> the permission requests (from RS to AS)  can be considered as signaling t=
o
> the AS what audience/scope RS expects.
>
>
>
> In ACE, there are limitations of course - i.e., RS may not always reach A=
S
> etc.  Nevertheless, it may be useful to think how other groups approach
> similar problems.
>
>
>
> Best,
>
> --Cigdem
>
>
>
>
>
> On Mon, Oct 23, 2017 at 2:38 PM, Ludwig Seitz <ludwig.seitz@ri.se> wrote:
>
> Hello ACE,
>
> Jim Schaad has brought up an interesting question [1] on
> draft-ietf-ace-oauth-authz [2]:
>
> Currently when a client makes an unauthorized request to a resource
> server, it gets back the address of the authorization server and optional=
ly
> a nonce (to prevent replay attacks).
>
> Jim is suggesting to add hints to the audience and scope the resource
> server expects for accessing this resource.
>
> I'm not sure whether that would not reveal too much information to a
> potential attacker.
>
> What does the group think of this issue?
>
> /Ludwig
>
>
> [1] https://github.com/ace-wg/ace-oauth/issues/124
> [2] https://tools.ietf.org/html/draft-ietf-ace-oauth-authz-08#
> section-5.1.2
> --
> Ludwig Seitz, PhD
> Security Lab, RISE SICS
> Phone +46(0)70-349 92 51
>
> _______________________________________________
> Ace mailing list
> Ace@ietf.org
> https://www.ietf.org/mailman/listinfo/ace
>
>
>
>

--001a1147357096851e055d3fc93c
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

In the case of rogue requestor being the client, it does not have visibilit=
y into what is included in the permission ticket ( ticket is a reference re=
turned by rs to be presented at as). It may dos Rs with requests, which rs =
may implement a solution like rate limiting (not described in uma).<div><br=
></div><div>The as api for rs is protected via an oauth2 token (PAT) which =
rs must present for permission registration (as well as for other functions=
). This Pat allows as to map es=E2=80=99s request to a particular Ro. Rs ca=
n only ask for permissions for the resources and scopes it already register=
ed with the As.</div><div><br></div><div>Hope I was able to clarify.</div><=
div><br></div><div>Thanks,</div><div>=E2=80=94Cigdem=C2=A0<br><br>On Wednes=
day, October 25, 2017, Jim Schaad &lt;<a href=3D"mailto:ietf@augustcellars.=
com">ietf@augustcellars.com</a>&gt; wrote:<br><blockquote class=3D"gmail_qu=
ote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex=
"><div lang=3D"EN-US" link=3D"blue" vlink=3D"purple"><div><p class=3D"MsoNo=
rmal">So you would be doing based on something like the address of the requ=
estor or the content of the request.=C2=A0 I would complete understand the =
first half.=C2=A0 Is there any way to prevent a rouge requestor from asking=
 for information =E2=80=93 or are you just relying on a closed system?<u></=
u><u></u></p><p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p><div style=3D"b=
order:none;border-left:solid blue 1.5pt;padding:0in 0in 0in 4.0pt"><div><di=
v style=3D"border:none;border-top:solid #e1e1e1 1.0pt;padding:3.0pt 0in 0in=
 0in"><p class=3D"MsoNormal"><b>From:</b> Cigdem Sengul [mailto:<a href=3D"=
javascript:_e(%7B%7D,&#39;cvml&#39;,&#39;cigdem.sengul@gmail.com&#39;);" ta=
rget=3D"_blank">cigdem.sengul@gmail.<wbr>com</a>] <br><b>Sent:</b> Wednesda=
y, October 25, 2017 2:19 PM<br><b>To:</b> Jim Schaad &lt;<a href=3D"javascr=
ipt:_e(%7B%7D,&#39;cvml&#39;,&#39;ietf@augustcellars.com&#39;);" target=3D"=
_blank">ietf@augustcellars.com</a>&gt;<br><b>Cc:</b> Ludwig Seitz &lt;<a hr=
ef=3D"javascript:_e(%7B%7D,&#39;cvml&#39;,&#39;ludwig.seitz@ri.se&#39;);" t=
arget=3D"_blank">ludwig.seitz@ri.se</a>&gt;; <a href=3D"javascript:_e(%7B%7=
D,&#39;cvml&#39;,&#39;ace@ietf.org&#39;);" target=3D"_blank">ace@ietf.org</=
a><br><b>Subject:</b> Re: [Ace] Question about the response to an unauthori=
zed request<u></u><u></u></p></div></div><p class=3D"MsoNormal"><u></u>=C2=
=A0<u></u></p><p class=3D"MsoNormal">UMA assumes that=C2=A0<span style=3D"f=
ont-size:12.0pt;font-family:&quot;Cambria&quot;,serif">=C2=A0resource serve=
r=C2=A0knows=C2=A0=E2=80=9Cwhich authorization server to approach for the p=
ermission ticket and on which resource owner&#39;s behalf=E2=80=9D deriving=
 =E2=80=9Cthe necessary information using cues provided by the structure of=
 the API where the resource request was made, rather than by an access toke=
n. =E2=80=9C<br></span><br>On Wednesday, October 25, 2017, Jim Schaad &lt;<=
a href=3D"javascript:_e(%7B%7D,&#39;cvml&#39;,&#39;ietf@augustcellars.com&#=
39;);" target=3D"_blank">ietf@augustcellars.com</a>&gt; wrote:<u></u><u></u=
></p><blockquote style=3D"border:none;border-left:solid #cccccc 1.0pt;paddi=
ng:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-right:0in"><div><div><p class=
=3D"MsoNormal">How does the RS make an informed decision about who the clie=
nt is given that it is a tokenless access request?<u></u><u></u></p><p clas=
s=3D"MsoNormal">=C2=A0<u></u><u></u></p><p class=3D"MsoNormal">=C2=A0<u></u=
><u></u></p><p class=3D"MsoNormal">=C2=A0<u></u><u></u></p><div style=3D"bo=
rder:none;border-left:solid blue 1.5pt;padding:0in 0in 0in 4.0pt"><div><div=
 style=3D"border:none;border-top:solid #e1e1e1 1.0pt;padding:3.0pt 0in 0in =
0in"><p class=3D"MsoNormal"><b>From:</b> Ace [mailto:<a>ace-bounces@ietf.or=
g</a>] <b>On Behalf Of </b>Cigdem Sengul<br><b>Sent:</b> Wednesday, October=
 25, 2017 7:28 AM<br><b>To:</b> Ludwig Seitz &lt;<a>ludwig.seitz@ri.se</a>&=
gt;<br><b>Cc:</b> <a>ace@ietf.org</a><br><b>Subject:</b> Re: [Ace] Question=
 about the response to an unauthorized request<u></u><u></u></p></div></div=
><p class=3D"MsoNormal">=C2=A0<u></u><u></u></p><div><div><p class=3D"MsoNo=
rmal">Hello,<u></u><u></u></p><div><p class=3D"MsoNormal">=C2=A0<u></u><u><=
/u></p></div><div><p class=3D"MsoNormal">To bring a different view, I wante=
d to mention Kantara UMA (User Managed Access) approach to this problem. (I=
 participated in the UMA v2.0 development this year, so had the chance to b=
e more familiar with the new drafts.)<u></u><u></u></p></div><div><p class=
=3D"MsoNormal">=C2=A0<u></u><u></u></p></div><div><p class=3D"MsoNormal">In=
 UMA,=C2=A0 the resource server must respond to a client&#39;s tokenless (u=
nauthorized) access attempt by obtaining a permission ticket from the autho=
rization server.<u></u><u></u></p></div><div><p class=3D"MsoNormal">If RS i=
s able to obtain a permission ticket from the AS, RS returns this ticket to=
 the client also with=C2=A0 the AS uri to aid AS discovery.=C2=A0<u></u><u>=
</u></p></div><div><p class=3D"MsoNormal">=C2=A0<u></u><u></u></p></div><di=
v><p class=3D"MsoNormal">UMA handles resources (resource sets, permissions =
etc.) differently but the permission requests (from RS to AS)=C2=A0 can be =
considered as signaling to the AS what audience/scope RS expects.<u></u><u>=
</u></p></div><div><p class=3D"MsoNormal">=C2=A0<u></u><u></u></p></div><di=
v><p class=3D"MsoNormal">In ACE, there are limitations of course - i.e., RS=
 may not always reach AS etc.=C2=A0 Nevertheless, it may be useful to think=
 how other groups approach similar problems.=C2=A0<u></u><u></u></p></div><=
div><p class=3D"MsoNormal">=C2=A0<u></u><u></u></p></div><div><p class=3D"M=
soNormal">Best,=C2=A0<u></u><u></u></p></div><div><p class=3D"MsoNormal">--=
Cigdem=C2=A0<u></u><u></u></p></div></div><div><p class=3D"MsoNormal">=C2=
=A0<u></u><u></u></p></div></div><div><p class=3D"MsoNormal">=C2=A0<u></u><=
u></u></p><div><p class=3D"MsoNormal">On Mon, Oct 23, 2017 at 2:38 PM, Ludw=
ig Seitz &lt;<a>ludwig.seitz@ri.se</a>&gt; wrote:<u></u><u></u></p><blockqu=
ote style=3D"border:none;border-left:solid #cccccc 1.0pt;padding:0in 0in 0i=
n 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5=
.0pt"><p class=3D"MsoNormal">Hello ACE,<br><br>Jim Schaad has brought up an=
 interesting question [1] on draft-ietf-ace-oauth-authz [2]:<br><br>Current=
ly when a client makes an unauthorized request to a resource server, it get=
s back the address of the authorization server and optionally a nonce (to p=
revent replay attacks).<br><br>Jim is suggesting to add hints to the audien=
ce and scope the resource server expects for accessing this resource.<br><b=
r>I&#39;m not sure whether that would not reveal too much information to a =
potential attacker.<br><br>What does the group think of this issue?<br><br>=
/Ludwig<br><br><br>[1] <a href=3D"https://github.com/ace-wg/ace-oauth/issue=
s/124" target=3D"_blank">https://github.com/ace-wg/ace-<wbr>oauth/issues/12=
4</a><br>[2] <a href=3D"https://tools.ietf.org/html/draft-ietf-ace-oauth-au=
thz-08#section-5.1.2" target=3D"_blank">https://tools.ietf.org/html/<wbr>dr=
aft-ietf-ace-oauth-authz-08#<wbr>section-5.1.2</a><span style=3D"color:#888=
888"><br>-- <br>Ludwig Seitz, PhD<br>Security Lab, RISE SICS<br>Phone <a hr=
ef=3D"tel:%2B46%280%2970-349%2092%2051" target=3D"_blank">+46(0)70-349 92 5=
1</a><br><br>______________________________<wbr>_________________<br>Ace ma=
iling list<br><a>Ace@ietf.org</a><br><a href=3D"https://www.ietf.org/mailma=
n/listinfo/ace" target=3D"_blank">https://www.ietf.org/mailman/<wbr>listinf=
o/ace</a></span><u></u><u></u></p></blockquote></div><p class=3D"MsoNormal"=
>=C2=A0<u></u><u></u></p></div></div></div></div></blockquote></div></div><=
/div></blockquote></div>

--001a1147357096851e055d3fc93c--


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From: Ludwig Seitz <ludwig.seitz@ri.se>
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On 2017-11-05 18:37, Cigdem Sengul wrote:
> In the case of rogue requestor being the client, it does not have 
> visibility into what is included in the permission ticket ( ticket is a 
> reference returned by rs to be presented at as). It may dos Rs with 
> requests, which rs may implement a solution like rate limiting (not 
> described in uma).
> 
> The as api for rs is protected via an oauth2 token (PAT) which rs must 
> present for permission registration (as well as for other functions). 
> This Pat allows as to map es’s request to a particular Ro. Rs can only 
> ask for permissions for the resources and scopes it already registered 
> with the As.
> 
> Hope I was able to clarify.
> 
> Thanks,
> —Cigdem
> 

Just for even more clarity: What you (or is it UMA?) call ticket is 
equivalent to the OAuth access tokens?

/Ludwig

-- 
Ludwig Seitz, PhD
Security Lab, RISE SICS
Phone +46(0)70-349 92 51


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From: Cigdem Sengul <cigdem.sengul@gmail.com>
Date: Mon, 6 Nov 2017 08:14:22 +0000
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Subject: [Ace]  Question about the response to an unauthorized request
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--94eb2c0600cec0dae2055d4c0a71
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

Hello Ludwig,

This is UMA. The ticket is a way for RS to register client=E2=80=99s reques=
t with
AS, giving it the ability to communicate other scopes etc related to
request.

Client presents the ticket to AS to obtain an access token. (So ticket is
not an access token).

I brought UMA ticket up to respond Jim=E2=80=99s original question of:
=E2=80=9CJim is suggesting to add hints to the audience and scope the resou=
rce
server expects for accessing this resource.=E2=80=9D

The ticket is a reference to audience/scopes the rs communicated to as with
respect to the request.

I already touched upon the feasibility of this in ACE given that rs and as
may not be always connected.

More info:
https://docs.kantarainitiative.org/uma/wg/oauth-uma-federated-authz-2.0-08.=
html#permission-endpoin
<https://docs.kantarainitiative.org/uma/wg/oauth-uma-federated-authz-2.0-08=
.html#permission-endpoint>
t
 Thanks,


On Monday, November 6, 2017, Ludwig Seitz <ludwig.seitz@ri.se
<javascript:_e(%7B%7D,'cvml','ludwig.seitz@ri.se');>> wrote:

> On 2017-11-05 18:37, Cigdem Sengul wrote:
>
>> In the case of rogue requestor being the client, it does not have
>> visibility into what is included in the permission ticket ( ticket is a
>> reference returned by rs to be presented at as). It may dos Rs with
>> requests, which rs may implement a solution like rate limiting (not
>> described in uma).
>>
>> The as api for rs is protected via an oauth2 token (PAT) which rs must
>> present for permission registration (as well as for other functions). Th=
is
>> Pat allows as to map es=E2=80=99s request to a particular Ro. Rs can onl=
y ask for
>> permissions for the resources and scopes it already registered with the =
As.
>>
>> Hope I was able to clarify.
>>
>> Thanks,
>> =E2=80=94Cigdem
>>
>>
> Just for even more clarity: What you (or is it UMA?) call ticket is
> equivalent to the OAuth access tokens?
>
> /Ludwig
>
> --
> Ludwig Seitz, PhD
> Security Lab, RISE SICS
> Phone +46(0)70-349 92 51
>
> _______________________________________________
> Ace mailing list
> Ace@ietf.org
> https://www.ietf.org/mailman/listinfo/ace
>

--94eb2c0600cec0dae2055d4c0a71
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

Hello Ludwig,<div><br></div><div>This is UMA. The ticket is a way for RS to=
 register client=E2=80=99s request with AS, giving it the ability to commun=
icate other scopes etc related to request.</div><div><br></div><div>Client =
presents the ticket to AS to obtain an access token. (So ticket is not an a=
ccess token).</div><div><br></div><div>I brought UMA ticket up to respond J=
im=E2=80=99s original question of:=C2=A0</div><div><span style=3D"color:rgb=
(34,34,34);font-size:14px">=E2=80=9CJim is suggesting to add hints to the a=
udience and scope the resource server expects for accessing this resource.=
=E2=80=9D</span><br></div><div><span style=3D"color:rgb(34,34,34);font-size=
:14px"><br></span></div><div><span style=3D"color:rgb(34,34,34);font-size:1=
4px">The ticket is=C2=A0a reference to audience/scopes the rs communicated =
to as with respect to the request.=C2=A0</span></div><div><span style=3D"co=
lor:rgb(34,34,34);font-size:14px"><br></span></div><div><span style=3D"colo=
r:rgb(34,34,34);font-size:14px">I already touched upon the feasibility of t=
his in ACE given that rs and as may not be always connected.=C2=A0</span></=
div><div><span style=3D"color:rgb(34,34,34);font-size:14px"><br></span></di=
v><div>More info:=C2=A0<a href=3D"https://docs.kantarainitiative.org/uma/wg=
/oauth-uma-federated-authz-2.0-08.html#permission-endpoint">https://docs.ka=
ntarainitiative.org/uma/wg/oauth-uma-federated-authz-2.0-08.html#permission=
-endpoin</a>t</div><div>=C2=A0Thanks,</div><div><br><br>On Monday, November=
 6, 2017, Ludwig Seitz &lt;<a href=3D"javascript:_e(%7B%7D,&#39;cvml&#39;,&=
#39;ludwig.seitz@ri.se&#39;);" target=3D"_blank">ludwig.seitz@ri.se</a>&gt;=
 wrote:<br><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;bor=
der-left:1px #ccc solid;padding-left:1ex">On 2017-11-05 18:37, Cigdem Sengu=
l wrote:<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">
In the case of rogue requestor being the client, it does not have visibilit=
y into what is included in the permission ticket ( ticket is a reference re=
turned by rs to be presented at as). It may dos Rs with requests, which rs =
may implement a solution like rate limiting (not described in uma).<br>
<br>
The as api for rs is protected via an oauth2 token (PAT) which rs must pres=
ent for permission registration (as well as for other functions). This Pat =
allows as to map es=E2=80=99s request to a particular Ro. Rs can only ask f=
or permissions for the resources and scopes it already registered with the =
As.<br>
<br>
Hope I was able to clarify.<br>
<br>
Thanks,<br>
=E2=80=94Cigdem<br>
<br>
</blockquote>
<br>
Just for even more clarity: What you (or is it UMA?) call ticket is equival=
ent to the OAuth access tokens?<br>
<br>
/Ludwig<br>
<br>
-- <br>
Ludwig Seitz, PhD<br>
Security Lab, RISE SICS<br>
Phone +46(0)70-349 92 51<br>
<br>
______________________________<wbr>_________________<br>
Ace mailing list<br>
<a>Ace@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/ace" target=3D"_blank">htt=
ps://www.ietf.org/mailman/l<wbr>istinfo/ace</a><br>
</blockquote></div>

--94eb2c0600cec0dae2055d4c0a71--


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Subject: [Ace] Timeslot request for draft-erdtman-ace-rpcc
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Hello ACE chairs,

I'd like to request a 5 min. timeslot for a remote presentation of 
draft-erdtman-ace-rpcc. I will have a in-person backup in case there is 
network trouble.

Regards,

Ludwig

-- 
Ludwig Seitz, PhD
Security Lab, RISE SICS
Phone +46(0)70-349 92 51


From nobody Mon Nov  6 08:11:50 2017
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From: Olaf Bergmann <bergmann@tzi.org>
To: ace-chairs@ietf.org
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Date: Mon, 06 Nov 2017 17:11:43 +0100
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Subject: [Ace] timeslot for draft-ietf-ace-dtls-authorize @IETF 100
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Dear chairs,

we would like to request a 10 min timeslot for the ACE session at IETF
100 to present the current status of draft-ietf-ace-dtls-authorize. We
have not yet decided on a presenter but at least one of the authors,
G=C3=B6ran, will be on-site.

Thanks
Olaf


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Date: Mon, 6 Nov 2017 16:33:48 -0600
From: Benjamin Kaduk <kaduk@mit.edu>
To: Olaf Bergmann <bergmann@tzi.org>
Cc: ace-chairs@ietf.org, ace@ietf.org
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Subject: Re: [Ace] timeslot for draft-ietf-ace-dtls-authorize @IETF 100
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Hi Olaf,

On Mon, Nov 06, 2017 at 05:11:43PM +0100, Olaf Bergmann wrote:
> Dear chairs,
> 
> we would like to request a 10 min timeslot for the ACE session at IETF
> 100 to present the current status of draft-ietf-ace-dtls-authorize. We
> have not yet decided on a presenter but at least one of the authors,
> Gran, will be on-site.

It looks like we will have time for a 10-minute slot.

Since we need to coordinate with Meetecho for remote presenters, please
let us know by this Wednesday (8 November) if the presenter is likely
to be remote.

Thanks,

Ben


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Subject: [Ace] Fwd: IPR Disclosure Telefonaktiebolaget LM Ericsson (publ)'s Statement about IPR related to draft-tschofenig-ace-group-communication-security
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We wanted to make the ACE working group aware of an IPR disclosure on
the group communication security from Ericsson.

-------- Forwarded Message --------
Subject: IPR Disclosure Telefonaktiebolaget LM Ericsson (publ)'s
Statement about IPR related to
draft-tschofenig-ace-group-communication-security
Resent-Date: Wed,  1 Nov 2017 08:38:47 -0700 (PDT)
Resent-From: alias-bounces@ietf.org
Resent-To: Hannes.Tschofenig@gmx.net, werner@werner-ms.at
Date: Wed, 01 Nov 2017 08:38:47 -0700
From: IETF Secretariat <ietf-ipr@ietf.org>
To: draft-tschofenig-ace-group-communication-security@ietf.org
CC: alissa@cooperw.in, ipr-announce@ietf.org

Dear Hannes Tschofenig, Walter Werner:


An IPR disclosure that pertains to your Internet-Draft entitled
"Security for Low-Latency Group Communication"
(draft-tschofenig-ace-group-communication-security) was submitted to the
IETF
Secretariat on  and has been posted on the "IETF Page of Intellectual
Property Rights Disclosures" (https://datatracker.ietf.org/ipr/3099/). The
title of the IPR disclosure is "Telefonaktiebolaget LM Ericsson (publ)'s
Statement about IPR related to
draft-tschofenig-ace-group-communication-security"


Thank you

IETF Secretariat


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Archived-At: <https://mailarchive.ietf.org/arch/msg/ace/trAWmVWmeSDZh-V_ViIKdao2YyM>
Subject: [Ace] Group Communication Security
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Hi all,

I wonder whether there is time to talk about the group communication securi=
ty work at the upcoming IETF meeting.
Walter and I have re-submitted the draft-tschofenig-ace-group-communication=
-security-00  draft (which is just a new version of the earlier published d=
raft-somaraju-ace-multicast work) and despite the Ericsson IPR we still thi=
nk it is worthwhile to chat about what we actually want to accomplish.

At the virtual interim meeting there was some confusion about what was real=
ly needed.

It is our believe that a symmetric group communication security solution is=
 needed for the low latency requirement in the commercial indoor lighting d=
omain.
We want to finally come to a conclusion whether we want to do this in the g=
roup.

I don't think we would need a lot of time since we don't need to talk about=
 how the detailed solution looks like since we need to get an agreement abo=
ut the requirements first.

Ciao
Hannes

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any medium. Thank you.

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<p class=3D"MsoNormal">Hi all, <o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">I wonder whether there is time to talk about the gro=
up communication security work at the upcoming IETF meeting.
<o:p></o:p></p>
<p class=3D"MsoNormal">Walter and I have re-submitted the draft-tschofenig-=
ace-group-communication-security-00 &nbsp;draft (which is just a new versio=
n of the earlier published draft-somaraju-ace-multicast work) and despite t=
he Ericsson IPR we still think it is worthwhile
 to chat about what we actually want to accomplish. <o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">At the virtual interim meeting there was some confus=
ion about what was really needed.
<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">It is our believe that a symmetric group communicati=
on security solution is needed for the low latency requirement in the comme=
rcial indoor lighting domain.
<o:p></o:p></p>
<p class=3D"MsoNormal">We want to finally come to a conclusion whether we w=
ant to do this in the group.
<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">I don&#8217;t think we would need a lot of time sinc=
e we don&#8217;t need to talk about how the detailed solution looks like si=
nce we need to get an agreement about the requirements first.
<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Ciao<br>
Hannes<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
</div>
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Date: Tue, 7 Nov 2017 09:48:38 -0600
From: Benjamin Kaduk <kaduk@mit.edu>
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Subject: [Ace] IETF 100 draft agenda posted
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Hi all,

I just posted a draft agenda to the datatracker for our sesion in
Singapore, included below for your convenience.  Note that it is
still draft, i.e., might change some more.

Presenters, please send your slides to the chairs by Sunday the 12th
so that we can get them uploaded and confirm that we can display them,
etc.  We also would like to ask the presenters to focus their presentations
on open issues that require WG input -- all of the documents on the agenda
have been presented previously, and there is not much need for a
tutorial/content section as an introduction.

-Ben
for the chairs


==================================================================

ACE WG Meeting
IETF 100 - Singapore

Agenda Bashing and Administrivia (Chairs, 5 mins)

Status Update (Chairs, 5 mins)

Current Working Group Documents:
  * draft-ietf-ace-cbor-web-token (5 mins) - Mike Jones
  * draft-ietf-ace-cwt-proof-of-possession (10 mins) - Mike Jones
  * draft-seitz-ace-oscoap-profile (10 mins) - Francesca Palombini
  * draft-ietf-ace-oauth-authz (15 mins) - Ludwig Seitz
  * draft-ietf-ace-dtls-authorize (10 mins) - Olaf Bergmann/Gran

Non-Working Group Documents:
  * draft-tiloca-ace-oscoap-joining (15 mins) - Marco Tiloa
  * draft-aragon-ace-ipsec-profile (5 mins) - Marco Tiloa

  * draft-vanderstok-ace-coap-est (15 mins) - Peter van der Stok

Wrap up - (Chairs, 15 mins)
  * Steps before next meeting


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From: Hannes Tschofenig <Hannes.Tschofenig@arm.com>
To: Benjamin Kaduk <kaduk@mit.edu>, "ace@ietf.org" <ace@ietf.org>
Thread-Topic: [Ace] IETF 100 draft agenda posted
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Archived-At: <https://mailarchive.ietf.org/arch/msg/ace/EMlv-piRDRXokA99p3NF5h2O1s8>
Subject: Re: [Ace] IETF 100 draft agenda posted
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Hi Ben,

I suspect my question about agenda time for the group communication securit=
y topic was thereby (indirectly) answered with "no".

Ciao
Hannes


-----Original Message-----
From: Ace [mailto:ace-bounces@ietf.org] On Behalf Of Benjamin Kaduk
Sent: 07 November 2017 16:49
To: ace@ietf.org
Subject: [Ace] IETF 100 draft agenda posted

Hi all,

I just posted a draft agenda to the datatracker for our sesion in Singapore=
, included below for your convenience.  Note that it is still draft, i.e., =
might change some more.

Presenters, please send your slides to the chairs by Sunday the 12th so tha=
t we can get them uploaded and confirm that we can display them, etc.  We a=
lso would like to ask the presenters to focus their presentations on open i=
ssues that require WG input -- all of the documents on the agenda have been=
 presented previously, and there is not much need for a tutorial/content se=
ction as an introduction.

-Ben
for the chairs


=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

ACE WG Meeting
IETF 100 - Singapore

Agenda Bashing and Administrivia (Chairs, 5 mins)

Status Update (Chairs, 5 mins)

Current Working Group Documents:
  * draft-ietf-ace-cbor-web-token (5 mins) - Mike Jones
  * draft-ietf-ace-cwt-proof-of-possession (10 mins) - Mike Jones
  * draft-seitz-ace-oscoap-profile (10 mins) - Francesca Palombini
  * draft-ietf-ace-oauth-authz (15 mins) - Ludwig Seitz
  * draft-ietf-ace-dtls-authorize (10 mins) - Olaf Bergmann/G=F6ran

Non-Working Group Documents:
  * draft-tiloca-ace-oscoap-joining (15 mins) - Marco Tiloa
  * draft-aragon-ace-ipsec-profile (5 mins) - Marco Tiloa

  * draft-vanderstok-ace-coap-est (15 mins) - Peter van der Stok

Wrap up - (Chairs, 15 mins)
  * Steps before next meeting

_______________________________________________
Ace mailing list
Ace@ietf.org
https://www.ietf.org/mailman/listinfo/ace
IMPORTANT NOTICE: The contents of this email and any attachments are confid=
ential and may also be privileged. If you are not the intended recipient, p=
lease notify the sender immediately and do not disclose the contents to any=
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any medium. Thank you.


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Date: Tue, 7 Nov 2017 11:11:17 -0600
From: Benjamin Kaduk <kaduk@mit.edu>
To: Hannes Tschofenig <Hannes.Tschofenig@arm.com>
Cc: "ace@ietf.org" <ace@ietf.org>
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Subject: Re: [Ace] IETF 100 draft agenda posted
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Hi Hannes,

I wouldn't say that; it's more of a race condition as I prepared the
agenda last night and did not see your request this morning before I
submitted the draft agenda.  So, you should expect a separate response
to that request (and could note that the current agenda does not fill
the allocated timeslot),

-Ben

On Tue, Nov 07, 2017 at 05:05:09PM +0000, Hannes Tschofenig wrote:
> Hi Ben,
> 
> I suspect my question about agenda time for the group communication security topic was thereby (indirectly) answered with "no".
> 
> Ciao
> Hannes
> 
> 
> -----Original Message-----
> From: Ace [mailto:ace-bounces@ietf.org] On Behalf Of Benjamin Kaduk
> Sent: 07 November 2017 16:49
> To: ace@ietf.org
> Subject: [Ace] IETF 100 draft agenda posted
> 
> Hi all,
> 
> I just posted a draft agenda to the datatracker for our sesion in Singapore, included below for your convenience.  Note that it is still draft, i.e., might change some more.
> 
> Presenters, please send your slides to the chairs by Sunday the 12th so that we can get them uploaded and confirm that we can display them, etc.  We also would like to ask the presenters to focus their presentations on open issues that require WG input -- all of the documents on the agenda have been presented previously, and there is not much need for a tutorial/content section as an introduction.
> 
> -Ben
> for the chairs
> 
> 
> ==================================================================
> 
> ACE WG Meeting
> IETF 100 - Singapore
> 
> Agenda Bashing and Administrivia (Chairs, 5 mins)
> 
> Status Update (Chairs, 5 mins)
> 
> Current Working Group Documents:
>   * draft-ietf-ace-cbor-web-token (5 mins) - Mike Jones
>   * draft-ietf-ace-cwt-proof-of-possession (10 mins) - Mike Jones
>   * draft-seitz-ace-oscoap-profile (10 mins) - Francesca Palombini
>   * draft-ietf-ace-oauth-authz (15 mins) - Ludwig Seitz
>   * draft-ietf-ace-dtls-authorize (10 mins) - Olaf Bergmann/Gran
> 
> Non-Working Group Documents:
>   * draft-tiloca-ace-oscoap-joining (15 mins) - Marco Tiloa
>   * draft-aragon-ace-ipsec-profile (5 mins) - Marco Tiloa
> 
>   * draft-vanderstok-ace-coap-est (15 mins) - Peter van der Stok
> 
> Wrap up - (Chairs, 15 mins)
>   * Steps before next meeting
> 
> _______________________________________________
> Ace mailing list
> Ace@ietf.org
> https://www.ietf.org/mailman/listinfo/ace
> IMPORTANT NOTICE: The contents of this email and any attachments are confidential and may also be privileged. If you are not the intended recipient, please notify the sender immediately and do not disclose the contents to any other person, use it for any purpose, or store or copy the information in any medium. Thank you.
> 
> _______________________________________________
> Ace mailing list
> Ace@ietf.org
> https://www.ietf.org/mailman/listinfo/ace


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All,

I had the opportunity to review the MQTT-TLS profile for ACE [1] and 
I’d like to share my thoughts with this list.


The document at hand proposed that token expiry checks take place on 
PUBLISH, SUBSCRIBE or CONNECT actions. I’d like to note that it might 
be worthwhile to have the token expiry checks for PINGREQ packets in 
order to make sure that “sleeping” MQTT clients which do not send 
PUBLISH or SUBSCRIBE packets can get disconnected at the next possible 
client interaction with the broker.

On a sidenote: In a recent MQTT project with millions of constrained and 
untrusted devices (connected via unreliable communication channels), an 
almost identical approach as proposed in the draft was implemented. The 
authentication and authorization was implemented exactly as described in 
this document with the use of the Introspection API and “offline 
validation” of JWTs. So I can confirm that the approach proposed is 
actually usable at scale and works very well with some existing MQTT 
brokers.

All the best,
Dominik

[1] https://www.ietf.org/id/draft-sengul-ace-mqtt-tls-profile-01.txt


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From: Anthony Kirby <Anthony.Kirby@nominet.uk>
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CC: Dominik Obermaier <dominik.obermaier@gmail.com>
Thread-Topic: [Ace] MQTT-TLS profile of ACE
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Archived-At: <https://mailarchive.ietf.org/arch/msg/ace/j2q9MN2o8vtYU9od3mA3UVzyJWY>
Subject: Re: [Ace] MQTT-TLS profile of ACE
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Hi Dominik,
many thanks for the review! It's appreciated.

We didn't initially consider the keepalive / PINGREQ, because we'd seen it =
as (effectively) a lower layer issue.  But I understand value of using it a=
s an opportunity to check for token expiry:  Even if it happens frequently,=
 each check will be a low cost for the broker.  Thank you for the suggestio=
n, I'll add it to the draft.

Thinking aloud, it might not be straightforward to implement this when exte=
nding an existing broker (for example the mosquitto auth plugin) so I expec=
t it would be a SHOULD rather than a MUST.

Anthony


________________________________________
From: Ace <ace-bounces@ietf.org> on behalf of Dominik Obermaier <dominik.ob=
ermaier@gmail.com>
Sent: 07 November 2017 21:29
To: ace@ietf.org
Subject: [Ace] MQTT-TLS profile of ACE

All,

I had the opportunity to review the MQTT-TLS profile for ACE [1] and
I=92d like to share my thoughts with this list.


The document at hand proposed that token expiry checks take place on
PUBLISH, SUBSCRIBE or CONNECT actions. I=92d like to note that it might
be worthwhile to have the token expiry checks for PINGREQ packets in
order to make sure that =93sleeping=94 MQTT clients which do not send
PUBLISH or SUBSCRIBE packets can get disconnected at the next possible
client interaction with the broker.

On a sidenote: In a recent MQTT project with millions of constrained and
untrusted devices (connected via unreliable communication channels), an
almost identical approach as proposed in the draft was implemented. The
authentication and authorization was implemented exactly as described in
this document with the use of the Introspection API and =93offline
validation=94 of JWTs. So I can confirm that the approach proposed is
actually usable at scale and works very well with some existing MQTT
brokers.

All the best,
Dominik

[1] https://www.ietf.org/id/draft-sengul-ace-mqtt-tls-profile-01.txt

_______________________________________________
Ace mailing list
Ace@ietf.org
https://www.ietf.org/mailman/listinfo/ace


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From: Cigdem Sengul <cigdem.sengul@gmail.com>
Date: Fri, 10 Nov 2017 14:08:56 +0000
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Subject: Re: [Ace] MQTT-TLS profile of ACE
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Thank you Dominik for your review of the draft. We mentioned in the virtual
interim that we approached to OASIS MQTT TC for reviewers; Dominik  kindly
agreed to review our draft.

Indeed, the PINGREQs were not included for checking token expiry as they do
not signal a token (like CONNECT) or topic permissions (like
PUBLISH/SUBSCRIBE). But, your suggestion would be a very useful
optimization for early detection of token expiry. As Anthony said, we will
add it to the draft (possibly as a SHOULD).

Very glad to hear that your ongoing project is in agreement with the draft.
It would be very useful to get input from your deployment experience.

Sincerely,
--Cigdem

On Wed, Nov 8, 2017 at 1:34 PM, Anthony Kirby <Anthony.Kirby@nominet.uk>
wrote:

> Hi Dominik,
> many thanks for the review! It's appreciated.
>
> We didn't initially consider the keepalive / PINGREQ, because we'd seen i=
t
> as (effectively) a lower layer issue.  But I understand value of using it
> as an opportunity to check for token expiry:  Even if it happens
> frequently, each check will be a low cost for the broker.  Thank you for
> the suggestion, I'll add it to the draft.
>
> Thinking aloud, it might not be straightforward to implement this when
> extending an existing broker (for example the mosquitto auth plugin) so I
> expect it would be a SHOULD rather than a MUST.
>
> Anthony
>
>
> ________________________________________
> From: Ace <ace-bounces@ietf.org> on behalf of Dominik Obermaier <
> dominik.obermaier@gmail.com>
> Sent: 07 November 2017 21:29
> To: ace@ietf.org
> Subject: [Ace] MQTT-TLS profile of ACE
>
> All,
>
> I had the opportunity to review the MQTT-TLS profile for ACE [1] and
> I=E2=80=99d like to share my thoughts with this list.
>
>
> The document at hand proposed that token expiry checks take place on
> PUBLISH, SUBSCRIBE or CONNECT actions. I=E2=80=99d like to note that it m=
ight
> be worthwhile to have the token expiry checks for PINGREQ packets in
> order to make sure that =E2=80=9Csleeping=E2=80=9D MQTT clients which do =
not send
> PUBLISH or SUBSCRIBE packets can get disconnected at the next possible
> client interaction with the broker.
>
> On a sidenote: In a recent MQTT project with millions of constrained and
> untrusted devices (connected via unreliable communication channels), an
> almost identical approach as proposed in the draft was implemented. The
> authentication and authorization was implemented exactly as described in
> this document with the use of the Introspection API and =E2=80=9Coffline
> validation=E2=80=9D of JWTs. So I can confirm that the approach proposed =
is
> actually usable at scale and works very well with some existing MQTT
> brokers.
>
> All the best,
> Dominik
>
> [1] https://www.ietf.org/id/draft-sengul-ace-mqtt-tls-profile-01.txt
>
> _______________________________________________
> Ace mailing list
> Ace@ietf.org
> https://www.ietf.org/mailman/listinfo/ace
>
> _______________________________________________
> Ace mailing list
> Ace@ietf.org
> https://www.ietf.org/mailman/listinfo/ace
>

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<div dir=3D"ltr">Thank you Dominik for your review of the draft. We mention=
ed in the virtual interim that we approached to OASIS MQTT TC for reviewers=
; Dominik =C2=A0kindly agreed to review our draft.=C2=A0<div><br></div><div=
>Indeed, the PINGREQs were not included for checking token expiry as they d=
o not signal a token (like CONNECT) or topic permissions (like PUBLISH/SUBS=
CRIBE). But, your suggestion would be a very useful optimization for early =
detection of token expiry. As Anthony said, we will add it to the draft (po=
ssibly as a SHOULD).=C2=A0</div><div><br></div><div>Very glad to hear that =
your ongoing project is in agreement with the draft. It would be very usefu=
l to get input from your deployment experience.=C2=A0</div><div><br></div><=
div>Sincerely,</div><div>--Cigdem =C2=A0</div></div><div class=3D"gmail_ext=
ra"><br><div class=3D"gmail_quote">On Wed, Nov 8, 2017 at 1:34 PM, Anthony =
Kirby <span dir=3D"ltr">&lt;<a href=3D"mailto:Anthony.Kirby@nominet.uk" tar=
get=3D"_blank">Anthony.Kirby@nominet.uk</a>&gt;</span> wrote:<br><blockquot=
e class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc sol=
id;padding-left:1ex">Hi Dominik,<br>
many thanks for the review! It&#39;s appreciated.<br>
<br>
We didn&#39;t initially consider the keepalive / PINGREQ, because we&#39;d =
seen it as (effectively) a lower layer issue.=C2=A0 But I understand value =
of using it as an opportunity to check for token expiry:=C2=A0 Even if it h=
appens frequently, each check will be a low cost for the broker.=C2=A0 Than=
k you for the suggestion, I&#39;ll add it to the draft.<br>
<br>
Thinking aloud, it might not be straightforward to implement this when exte=
nding an existing broker (for example the mosquitto auth plugin) so I expec=
t it would be a SHOULD rather than a MUST.<br>
<br>
Anthony<br>
<br>
<br>
______________________________<wbr>__________<br>
From: Ace &lt;<a href=3D"mailto:ace-bounces@ietf.org">ace-bounces@ietf.org<=
/a>&gt; on behalf of Dominik Obermaier &lt;<a href=3D"mailto:dominik.oberma=
ier@gmail.com">dominik.obermaier@gmail.com</a>&gt;<br>
Sent: 07 November 2017 21:29<br>
To: <a href=3D"mailto:ace@ietf.org">ace@ietf.org</a><br>
Subject: [Ace] MQTT-TLS profile of ACE<br>
<div class=3D"HOEnZb"><div class=3D"h5"><br>
All,<br>
<br>
I had the opportunity to review the MQTT-TLS profile for ACE [1] and<br>
I=E2=80=99d like to share my thoughts with this list.<br>
<br>
<br>
The document at hand proposed that token expiry checks take place on<br>
PUBLISH, SUBSCRIBE or CONNECT actions. I=E2=80=99d like to note that it mig=
ht<br>
be worthwhile to have the token expiry checks for PINGREQ packets in<br>
order to make sure that =E2=80=9Csleeping=E2=80=9D MQTT clients which do no=
t send<br>
PUBLISH or SUBSCRIBE packets can get disconnected at the next possible<br>
client interaction with the broker.<br>
<br>
On a sidenote: In a recent MQTT project with millions of constrained and<br=
>
untrusted devices (connected via unreliable communication channels), an<br>
almost identical approach as proposed in the draft was implemented. The<br>
authentication and authorization was implemented exactly as described in<br=
>
this document with the use of the Introspection API and =E2=80=9Coffline<br=
>
validation=E2=80=9D of JWTs. So I can confirm that the approach proposed is=
<br>
actually usable at scale and works very well with some existing MQTT<br>
brokers.<br>
<br>
All the best,<br>
Dominik<br>
<br>
[1] <a href=3D"https://www.ietf.org/id/draft-sengul-ace-mqtt-tls-profile-01=
.txt" rel=3D"noreferrer" target=3D"_blank">https://www.ietf.org/id/draft-<w=
br>sengul-ace-mqtt-tls-profile-<wbr>01.txt</a><br>
<br>
______________________________<wbr>_________________<br>
Ace mailing list<br>
<a href=3D"mailto:Ace@ietf.org">Ace@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/ace" rel=3D"noreferrer" ta=
rget=3D"_blank">https://www.ietf.org/mailman/<wbr>listinfo/ace</a><br>
<br>
______________________________<wbr>_________________<br>
Ace mailing list<br>
<a href=3D"mailto:Ace@ietf.org">Ace@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/ace" rel=3D"noreferrer" ta=
rget=3D"_blank">https://www.ietf.org/mailman/<wbr>listinfo/ace</a><br>
</div></div></blockquote></div><br></div>

--001a114a6abe221190055da176a9--


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{In some ways this should be a discussion among the authors of which I am now
one, but I feel that the discussion belongs in public}

1) discovery.

Section 4.1 provides for the process to start with a discovery operation.

   The presence and location of (path to) the management data are
   discovered by sending a GET request to "/.well-known/core" including
   a resource type (RT) parameter with the value "ace.est" [RFC6690].
   Upon success, the return payload will contain the root resource of
   the EST resources.  It is up to the implementation to choose its root
   resource; throughout this document the example root resource /est is
   used.  The example below shows the discovery of the presence and
   location of management data.

     REQ: GET /.well-known/core?rt=ace.est

I can see the architectural reasons for why we do that, but I really have to
ask why if we really really need this extra round trip.

The alternative is that we either have to use /.well-known/est, or that
we wind up standardizing something (maybe /e) that isn't inside /.well-known.

Can DTLS compression do better things for us instead?


2) DTLS and HelloVerifyRequest.

SHOULD CoAP-EST servers always perform the HelloVerifyRequest state?
Again, it's an extra round trip.
Always doing it would simplify the code paths on both ends.



--
Michael Richardson <mcr+IETF@sandelman.ca>, Sandelman Software Works
 -= IPv6 IoT consulting =-




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From: peter van der Stok <stokcons@xs4all.nl>
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Hi Michael,

See below.

Michael Richardson schreef op 2017-11-10 19:41:
> {In some ways this should be a discussion among the authors of which I 
> am now
> one, but I feel that the discussion belongs in public}
> 
> 1) discovery.
> 
> Section 4.1 provides for the process to start with a discovery 
> operation.
> 
>    The presence and location of (path to) the management data are
>    discovered by sending a GET request to "/.well-known/core" including
>    a resource type (RT) parameter with the value "ace.est" [RFC6690].
>    Upon success, the return payload will contain the root resource of
>    the EST resources.  It is up to the implementation to choose its 
> root
>    resource; throughout this document the example root resource /est is
>    used.  The example below shows the discovery of the presence and
>    location of management data.
> 
>      REQ: GET /.well-known/core?rt=ace.est
> 
> I can see the architectural reasons for why we do that, but I really 
> have to
> ask why if we really really need this extra round trip.

This is the standard way of discovering coap endpoints.
It's done once at start-up. It's extra to what?

> 
> The alternative is that we either have to use /.well-known/est, or that
> we wind up standardizing something (maybe /e) that isn't inside 
> /.well-known.
> 
I don't understand this last phrase,

Peter


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--=-=-=
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peter van der Stok <stokcons@xs4all.nl> wrote:
    > Michael Richardson schreef op 2017-11-10 19:41:
    >> {In some ways this should be a discussion among the authors of which I am
    >> now
    >> one, but I feel that the discussion belongs in public}
    >>
    >> 1) discovery.
    >>
    >> Section 4.1 provides for the process to start with a discovery operation.
    >>
    >> The presence and location of (path to) the management data are
    >> discovered by sending a GET request to "/.well-known/core" including
    >> a resource type (RT) parameter with the value "ace.est" [RFC6690].
    >> Upon success, the return payload will contain the root resource of
    >> the EST resources.  It is up to the implementation to choose its root
    >> resource; throughout this document the example root resource /est is
    >> used.  The example below shows the discovery of the presence and
    >> location of management data.
    >>
    >> REQ: GET /.well-known/core?rt=ace.est
    >>
    >> I can see the architectural reasons for why we do that, but I really have
    >> to
    >> ask why if we really really need this extra round trip.

    > This is the standard way of discovering coap endpoints.
    > It's done once at start-up. It's extra to what?

Yes, once after a whole bunch of DTLS setup packets back and forth.
So perhaps it fades into noise compared to the DTLS setup...

    >> The alternative is that we either have to use /.well-known/est, or that
    >> we wind up standardizing something (maybe /e) that isn't inside
    >> /.well-known.
    >>
    > I don't understand this last phrase,

We could go against some architecture decisions and standardize /e or
something like that rather than /.well-known/est or the lookup.

Given the size of the vouchers, the certificates being passed around by
DTLS, and the DTLS record format... does shortening the URLs from
/.well-known/est buy much?  I shall look at the example packets in the
document to see.

Can the response from core?rt=ace.est be "/" or ""?

--
Michael Richardson <mcr+IETF@sandelman.ca>, Sandelman Software Works
 -= IPv6 IoT consulting =-




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From: Michael Richardson <mcr@sandelman.ca>
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Subject: Re: [Ace] some thoughts about vanderstok-ace-coap-est
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Michael Richardson <mcr+ietf@sandelman.ca> wrote:
    > Section 4.1 provides for the process to start with a discovery
    > operation.

...

    >      REQ: GET /.well-known/core?rt=ace.est

    > I can see the architectural reasons for why we do that, but I really
    > have to ask why if we really really need this extra round trip.

Having read rfc6690 over again in order to implement this, I am now further
convinced that using this mechanism as a way to shorten the /.well-known/est
to something else is not entirely right.

I can see how a CoAP multicast to /.well-known/core?rt=ace.est ought to
return a list of hosts that support EST, and that EST ought to be returned in
a list of supported interfaces.

I'm less convinced that we ought to be using this mechanism to shorten
/.well-known/est to /est (why stop there? can't we go to /?)
It seems like maybe a 301-like (Moved Permantly) reply from
/.well-known/est/*, but CoAP doesn't have 301 codes....





(weird to me that rfc6690 got published with an informative reference to CoAP,
as WIP... I guess the WG wanted to get it out. I wish our process would let
us update that reference to the RFC, because it confuses the rfc dependancy
process)

    > The alternative is that we either have to use /.well-known/est, or that
    > we wind up standardizing something (maybe /e) that isn't inside
    > /.well-known.

    > Can DTLS compression do better things for us instead?


    > 2) DTLS and HelloVerifyRequest.

    > SHOULD CoAP-EST servers always perform the HelloVerifyRequest state?
    > Again, it's an extra round trip.  Always doing it would simplify the
    > code paths on both ends.



    > --
    > Michael Richardson <mcr+IETF@sandelman.ca>, Sandelman Software Works -=
    > IPv6 IoT consulting =-




--
]               Never tell me the odds!                 | ipv6 mesh networks [
]   Michael Richardson, Sandelman Software Works        | network architect  [
]     mcr@sandelman.ca  http://www.sandelman.ca/        |   ruby on rails    [


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Subject: [Ace] Early warning: Rewrite of vanderstok-ace-coap-est
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Hi all,

I had provided comments on the EST over CoAP document in the past. Unfortun=
ately, my recommendations have been ignored and instead the document went i=
nto the other direction getting more complex with every draft version.

I need something that just allows me to run EST over CoAP - nothing more. A=
s a result, I don't want profiling, don't want normative dependency to the =
ANIMA work, and don't want any relationship to IEEE 802.15.4. EST over CoAP=
 should be able to run in a variety of context and over a number of network=
s.

For this purpose I am planning to write a new draft during this week that c=
overs only one thing, namely carrying EST over CoAP without any profiling a=
nd without any new functionality.
If someone is interested in collaborating with me please drop me a note.

Ciao
Hannes

IMPORTANT NOTICE: The contents of this email and any attachments are confid=
ential and may also be privileged. If you are not the intended recipient, p=
lease notify the sender immediately and do not disclose the contents to any=
 other person, use it for any purpose, or store or copy the information in =
any medium. Thank you.

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<p class=3D"MsoNormal">Hi all, <o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">I had provided comments on the EST over CoAP documen=
t in the past. Unfortunately, my recommendations have been ignored and inst=
ead the document went into the other direction getting more complex with ev=
ery draft version.
<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">I need something that just allows me to run EST over=
 CoAP &#8211; nothing more. As a result, I don&#8217;t want profiling, don&=
#8217;t want normative dependency to the ANIMA work, and don&#8217;t want a=
ny relationship to IEEE 802.15.4. EST over CoAP should be
 able to run in a variety of context and over a number of networks. <o:p></=
o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">For this purpose I am planning to write a new draft =
during this week that covers only one thing, namely carrying EST over CoAP =
without any profiling and without any new functionality.
<o:p></o:p></p>
<p class=3D"MsoNormal">If someone is interested in collaborating with me pl=
ease drop me a note.
<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Ciao<o:p></o:p></p>
<p class=3D"MsoNormal">Hannes<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
</div>
IMPORTANT NOTICE: The contents of this email and any attachments are confid=
ential and may also be privileged. If you are not the intended recipient, p=
lease notify the sender immediately and do not disclose the contents to any=
 other person, use it for any purpose,
 or store or copy the information in any medium. Thank you.
</body>
</html>

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Subject: Re: [Ace] Early warning: Rewrite of vanderstok-ace-coap-est
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Hi Hannes,

thanks for the early warning.
Looking forward to reading your version.
Let's see afterwards how we continue ( one document or two complementary 
documents)

cheerio,

peter

Hannes Tschofenig schreef op 2017-11-13 03:55:
> Hi all,
> 
> I had provided comments on the EST over CoAP document in the past.
> Unfortunately, my recommendations have been ignored and instead the
> document went into the other direction getting more complex with every
> draft version.
> 
> I need something that just allows me to run EST over CoAP - nothing
> more. As a result, I don't want profiling, don't want normative
> dependency to the ANIMA work, and don't want any relationship to IEEE
> 802.15.4. EST over CoAP should be able to run in a variety of context
> and over a number of networks.
> 
> For this purpose I am planning to write a new draft during this week
> that covers only one thing, namely carrying EST over CoAP without any
> profiling and without any new functionality.
> 
> If someone is interested in collaborating with me please drop me a
> note.
> 
> Ciao
> 
> Hannes
> 
>   IMPORTANT NOTICE: The contents of this email and any attachments are
> confidential and may also be privileged. If you are not the intended
> recipient, please notify the sender immediately and do not disclose
> the contents to any other person, use it for any purpose, or store or
> copy the information in any medium. Thank you.
> _______________________________________________
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> Ace@ietf.org
> https://www.ietf.org/mailman/listinfo/ace


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From: "Panos Kampanakis (pkampana)" <pkampana@cisco.com>
To: Hannes Tschofenig <Hannes.Tschofenig@arm.com>, "ace@ietf.org" <ace@ietf.org>
Thread-Topic: Early warning: Rewrite of vanderstok-ace-coap-est
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Date: Mon, 13 Nov 2017 04:13:34 +0000
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Subject: Re: [Ace] Early warning: Rewrite of vanderstok-ace-coap-est
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Hi Hannes,
I think the current draft offers that. The BRSKI EST APIs are not mandatory=
 to implement by any means. The bindings of just the EST (RFC7030) APIs exp=
lained in the doc would suffice. If you are saying that the current doc is =
too complicated, may that is something that can be addressed. If you are sa=
ying that there need to be two docs, one for pure EST and one for the BRSKI=
 EST messages, maybe it makes sense. The list can chime in on that.
Looking forward to your draft.
Panos


From: Ace [mailto:ace-bounces@ietf.org] On Behalf Of Hannes Tschofenig
Sent: Sunday, November 12, 2017 9:55 PM
To: ace@ietf.org
Subject: [Ace] Early warning: Rewrite of vanderstok-ace-coap-est

Hi all,

I had provided comments on the EST over CoAP document in the past. Unfortun=
ately, my recommendations have been ignored and instead the document went i=
nto the other direction getting more complex with every draft version.

I need something that just allows me to run EST over CoAP - nothing more. A=
s a result, I don't want profiling, don't want normative dependency to the =
ANIMA work, and don't want any relationship to IEEE 802.15.4. EST over CoAP=
 should be able to run in a variety of context and over a number of network=
s.

For this purpose I am planning to write a new draft during this week that c=
overs only one thing, namely carrying EST over CoAP without any profiling a=
nd without any new functionality.
If someone is interested in collaborating with me please drop me a note.

Ciao
Hannes

IMPORTANT NOTICE: The contents of this email and any attachments are confid=
ential and may also be privileged. If you are not the intended recipient, p=
lease notify the sender immediately and do not disclose the contents to any=
 other person, use it for any purpose, or store or copy the information in =
any medium. Thank you.

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<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Hi Hannes,<o:p></o:p><=
/span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">I think the current dr=
aft offers that. The BRSKI EST APIs are not mandatory to implement by any m=
eans. The bindings of just the EST (RFC7030) APIs explained in the doc woul=
d suffice. If you are saying that the
 current doc is too complicated, may that is something that can be addresse=
d. If you are saying that there need to be two docs, one for pure EST and o=
ne for the BRSKI EST messages, maybe it makes sense. The list can chime in =
on that.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Looking forward to you=
r draft. <o:p>
</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Panos<o:p></o:p></span=
></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b>From:</b> Ace [mailto:ace-bounces@ietf.org] <b>On=
 Behalf Of
</b>Hannes Tschofenig<br>
<b>Sent:</b> Sunday, November 12, 2017 9:55 PM<br>
<b>To:</b> ace@ietf.org<br>
<b>Subject:</b> [Ace] Early warning: Rewrite of vanderstok-ace-coap-est<o:p=
></o:p></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB">Hi all, <o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB">I had provided comments on the =
EST over CoAP document in the past. Unfortunately, my recommendations have =
been ignored and instead the document went into the other direction getting=
 more complex with every draft version.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB">I need something that just allo=
ws me to run EST over CoAP &#8211; nothing more. As a result, I don&#8217;t=
 want profiling, don&#8217;t want normative dependency to the ANIMA work, a=
nd don&#8217;t want any relationship to IEEE 802.15.4. EST over
 CoAP should be able to run in a variety of context and over a number of ne=
tworks.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB">For this purpose I am planning =
to write a new draft during this week that covers only one thing, namely ca=
rrying EST over CoAP without any profiling and without any new functionalit=
y.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB">If someone is interested in col=
laborating with me please drop me a note.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB">Ciao<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB">Hannes<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:12.0pt;font-=
family:&quot;Times New Roman&quot;,serif">IMPORTANT NOTICE: The contents of=
 this email and any attachments are confidential and may also be privileged=
. If you are not the intended recipient, please
 notify the sender immediately and do not disclose the contents to any othe=
r person, use it for any purpose, or store or copy the information in any m=
edium. Thank you.
<o:p></o:p></span></p>
</div>
</body>
</html>

--_000_84a16e55cc914dfd8e75a04647c7e6acXCHALN010ciscocom_--


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From: Hannes Tschofenig <Hannes.Tschofenig@arm.com>
To: "Panos Kampanakis (pkampana)" <pkampana@cisco.com>, "ace@ietf.org" <ace@ietf.org>
Thread-Topic: Early warning: Rewrite of vanderstok-ace-coap-est
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Archived-At: <https://mailarchive.ietf.org/arch/msg/ace/KXTQ2K8N7yG4v2qGTB7ZiXMctRo>
Subject: Re: [Ace] Early warning: Rewrite of vanderstok-ace-coap-est
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I disagree with you, Panos.

The normative reference, include among other things, [I-D.ietf-anima-bootst=
rapping-keyinfra].

As you will see with my write-up there is a way to offer EST over CoAP supp=
ort without creating any such dependency. This will allow for generic uses =
of EST over CoAP, very much in spirit of the original spec EST spec

Ciao
Hannes

From: Panos Kampanakis (pkampana) [mailto:pkampana@cisco.com]
Sent: 13 November 2017 12:14
To: Hannes Tschofenig; ace@ietf.org
Subject: RE: Early warning: Rewrite of vanderstok-ace-coap-est

Hi Hannes,
I think the current draft offers that. The BRSKI EST APIs are not mandatory=
 to implement by any means. The bindings of just the EST (RFC7030) APIs exp=
lained in the doc would suffice. If you are saying that the current doc is =
too complicated, may that is something that can be addressed. If you are sa=
ying that there need to be two docs, one for pure EST and one for the BRSKI=
 EST messages, maybe it makes sense. The list can chime in on that.
Looking forward to your draft.
Panos


From: Ace [mailto:ace-bounces@ietf.org] On Behalf Of Hannes Tschofenig
Sent: Sunday, November 12, 2017 9:55 PM
To: ace@ietf.org
Subject: [Ace] Early warning: Rewrite of vanderstok-ace-coap-est

Hi all,

I had provided comments on the EST over CoAP document in the past. Unfortun=
ately, my recommendations have been ignored and instead the document went i=
nto the other direction getting more complex with every draft version.

I need something that just allows me to run EST over CoAP - nothing more. A=
s a result, I don't want profiling, don't want normative dependency to the =
ANIMA work, and don't want any relationship to IEEE 802.15.4. EST over CoAP=
 should be able to run in a variety of context and over a number of network=
s.

For this purpose I am planning to write a new draft during this week that c=
overs only one thing, namely carrying EST over CoAP without any profiling a=
nd without any new functionality.
If someone is interested in collaborating with me please drop me a note.

Ciao
Hannes

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From nobody Mon Nov 13 05:16:06 2017
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Date: Mon, 13 Nov 2017 14:16:00 +0100
From: peter van der Stok <stokcons@xs4all.nl>
To: Michael Richardson <mcr@sandelman.ca>
Cc: ace@ietf.org
Organization: vanderstok consultancy
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Subject: Re: [Ace] some thoughts about vanderstok-ace-coap-est
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Michael Richardson schreef op 2017-11-13 03:32:
> Michael Richardson <mcr+ietf@sandelman.ca> wrote:
>     > Section 4.1 provides for the process to start with a discovery
>     > operation.
> 
> ...
> 
>     >      REQ: GET /.well-known/core?rt=ace.est
> 
>     > I can see the architectural reasons for why we do that, but I 
> really
>     > have to ask why if we really really need this extra round trip.
> 
> Having read rfc6690 over again in order to implement this, I am now 
> further
> convinced that using this mechanism as a way to shorten the 
> /.well-known/est
> to something else is not entirely right.
> 
> I can see how a CoAP multicast to /.well-known/core?rt=ace.est ought to
> return a list of hosts that support EST, and that EST ought to be 
> returned in
> a list of supported interfaces.
> 
> I'm less convinced that we ought to be using this mechanism to shorten
> /.well-known/est to /est (why stop there? can't we go to /?)
> It seems like maybe a 301-like (Moved Permantly) reply from
> /.well-known/est/*, but CoAP doesn't have 301 codes....

/.well-known/core is supposed to contain links.
The links point to resources which can be at the host themselves or at 
other hosts.

The example link for the resource with rt=ace.est is /est in the draft.
Anything else than /est can be used; the chosen path name is SDO- or 
installation dependent.

Indeed table 1 proposes to shorten the path names to the resources; 
these have received the same resource type (rt) in the discovery request 
half a page later.
One could make them discoverable with different rt's. In the latter 
case, these rt's need to be registered and the path names become 
discoverable.

Hope this clarifies.

Peter



From nobody Mon Nov 13 07:38:42 2017
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From: Carsten Bormann <cabo@tzi.org>
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Subject: Re: [Ace] some thoughts about vanderstok-ace-coap-est
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On Nov 13, 2017, at 10:32, Michael Richardson <mcr@sandelman.ca> wrote:
>=20
> I'm less convinced that we ought to be using this mechanism to shorten
> /.well-known/est to /est (why stop there? can't we go to /?)

Why do you think that a node can only have one EST endpoint?
It should be possible to have many, and the client should be able to =
choose the one that is actually doing the right thing for them.

> It seems like maybe a 301-like (Moved Permantly) reply from
> /.well-known/est/*, but CoAP doesn't have 301 codes=E2=80=A6.

(The link-format self-description is exactly the replacement for the =
HTTP 301 here.  Same number of roundtrips...)

Gr=C3=BC=C3=9Fe, Carsten


From nobody Mon Nov 13 16:05:34 2017
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Subject: [Ace] I-D Action: draft-ietf-ace-actors-06.txt
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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Authentication and Authorization for Constrained Environments WG of the IETF.

        Title           : An architecture for authorization in constrained environments
        Authors         : Stefanie Gerdes
                          Ludwig Seitz
                          Goeran Selander
                          Carsten Bormann
	Filename        : draft-ietf-ace-actors-06.txt
	Pages           : 33
	Date            : 2017-11-13

Abstract:
   Constrained-node networks are networks where some nodes have severe
   constraints on code size, state memory, processing capabilities, user
   interface, power and communication bandwidth (RFC 7228).

   This document provides terminology, and identifies the elements that
   an architecture needs to address, providing a problem statement, for
   authentication and authorization in these networks.


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-ace-actors/

There are also htmlized versions available at:
https://tools.ietf.org/html/draft-ietf-ace-actors-06
https://datatracker.ietf.org/doc/html/draft-ietf-ace-actors-06

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-ace-actors-06


Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org.

Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/


From nobody Mon Nov 13 16:12:41 2017
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From: Carsten Bormann <cabo@tzi.org>
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Subject: [Ace] Fwd: New Version Notification for draft-ietf-ace-actors-06.txt
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I have submitted an update to the actors draft, now addressing all =
outstanding (in both senses of the word!) comments from Robin Wilton.

I have not been able to coordinate this with all the authors, so I =
expect one more editing round before WGLC.
One thing we could do in that next round is to remove material that =
really is about security considerations of IoT in general (and not about =
security considerations of the actors model); we now have =
draft-irtf-t2trg-core-security to point to.

Ceterum censeo: I renew my plea to return to sane terminology.

See (many of) you in 80 minutes...

Gr=C3=BC=C3=9Fe, Carsten


> Begin forwarded message:
>=20
> From: internet-drafts@ietf.org <mailto:internet-drafts@ietf.org>
> Subject: New Version Notification for draft-ietf-ace-actors-06.txt
> Date: November 14, 2017 at 08:05:28 GMT+8
> To: "Ludwig Seitz" <ludwig.seitz@ri.se <mailto:ludwig.seitz@ri.se>>, =
"Carsten Bormann" <cabo@tzi.org <mailto:cabo@tzi.org>>, "Goeran =
Selander" <goran.selander@ericsson.com =
<mailto:goran.selander@ericsson.com>>, "Stefanie Gerdes" <gerdes@tzi.org =
<mailto:gerdes@tzi.org>>
>=20
>=20
> A new version of I-D, draft-ietf-ace-actors-06.txt
> has been successfully submitted by Carsten Bormann and posted to the
> IETF repository.
>=20
> Name:		draft-ietf-ace-actors
> Revision:	06
> Title:		An architecture for authorization in constrained =
environments
> Document date:	2017-11-14
> Group:		ace
> Pages:		33
> URL:            =
https://www.ietf.org/internet-drafts/draft-ietf-ace-actors-06.txt =
<https://www.ietf.org/internet-drafts/draft-ietf-ace-actors-06.txt>
> Status:         =
https://datatracker.ietf.org/doc/draft-ietf-ace-actors/ =
<https://datatracker.ietf.org/doc/draft-ietf-ace-actors/>
> Htmlized:       https://tools.ietf.org/html/draft-ietf-ace-actors-06 =
<https://tools.ietf.org/html/draft-ietf-ace-actors-06>
> Htmlized:       =
https://datatracker.ietf.org/doc/html/draft-ietf-ace-actors-06 =
<https://datatracker.ietf.org/doc/html/draft-ietf-ace-actors-06>
> Diff:           =
https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-ace-actors-06 =
<https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-ace-actors-06>
>=20
> Abstract:
>   Constrained-node networks are networks where some nodes have severe
>   constraints on code size, state memory, processing capabilities, =
user
>   interface, power and communication bandwidth (RFC 7228).
>=20
>   This document provides terminology, and identifies the elements that
>   an architecture needs to address, providing a problem statement, for
>   authentication and authorization in these networks.


--Apple-Mail=_8DD79E1E-3B50-4D55-B093-3B715751BC17
Content-Transfer-Encoding: quoted-printable
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	charset=utf-8

<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html =
charset=3Dutf-8"><meta http-equiv=3D"Content-Type" content=3D"text/html =
charset=3Dutf-8"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" =
class=3D"">I have submitted an update to the actors draft, now =
addressing all outstanding (in both senses of the word!) comments from =
Robin Wilton.<div class=3D""><br class=3D""></div><div class=3D"">I have =
not been able to coordinate this with all the authors, so I expect one =
more editing round before WGLC.</div><div class=3D"">One thing we could =
do in that next round is to remove material that really is about =
security considerations of IoT in general (and not about security =
considerations of the actors model); we now have =
draft-irtf-t2trg-core-security to point to.</div><div class=3D""><br =
class=3D""></div><div class=3D"">Ceterum censeo: I renew my plea to =
return to sane terminology.</div><div class=3D""><br class=3D""></div><div=
 class=3D"">See (many of) you in 80 minutes...</div><div class=3D""><br =
class=3D""></div><div class=3D""><div class=3D"">Gr=C3=BC=C3=9Fe, =
Carsten</div><div class=3D""><br class=3D""></div><div><br =
class=3D""><blockquote type=3D"cite" class=3D""><div class=3D"">Begin =
forwarded message:</div><br class=3D"Apple-interchange-newline"><div =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px;" class=3D""><span style=3D"font-family: =
-webkit-system-font, Helvetica Neue, Helvetica, sans-serif; =
color:rgba(0, 0, 0, 1.0);" class=3D""><b class=3D"">From: =
</b></span><span style=3D"font-family: -webkit-system-font, Helvetica =
Neue, Helvetica, sans-serif;" class=3D""><a =
href=3D"mailto:internet-drafts@ietf.org" =
class=3D"">internet-drafts@ietf.org</a><br class=3D""></span></div><div =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px;" class=3D""><span style=3D"font-family: =
-webkit-system-font, Helvetica Neue, Helvetica, sans-serif; =
color:rgba(0, 0, 0, 1.0);" class=3D""><b class=3D"">Subject: =
</b></span><span style=3D"font-family: -webkit-system-font, Helvetica =
Neue, Helvetica, sans-serif;" class=3D""><b class=3D"">New Version =
Notification for draft-ietf-ace-actors-06.txt</b><br =
class=3D""></span></div><div style=3D"margin-top: 0px; margin-right: =
0px; margin-bottom: 0px; margin-left: 0px;" class=3D""><span =
style=3D"font-family: -webkit-system-font, Helvetica Neue, Helvetica, =
sans-serif; color:rgba(0, 0, 0, 1.0);" class=3D""><b class=3D"">Date: =
</b></span><span style=3D"font-family: -webkit-system-font, Helvetica =
Neue, Helvetica, sans-serif;" class=3D"">November 14, 2017 at 08:05:28 =
GMT+8<br class=3D""></span></div><div style=3D"margin-top: 0px; =
margin-right: 0px; margin-bottom: 0px; margin-left: 0px;" class=3D""><span=
 style=3D"font-family: -webkit-system-font, Helvetica Neue, Helvetica, =
sans-serif; color:rgba(0, 0, 0, 1.0);" class=3D""><b class=3D"">To: =
</b></span><span style=3D"font-family: -webkit-system-font, Helvetica =
Neue, Helvetica, sans-serif;" class=3D"">"Ludwig Seitz" &lt;<a =
href=3D"mailto:ludwig.seitz@ri.se" class=3D"">ludwig.seitz@ri.se</a>&gt;, =
"Carsten Bormann" &lt;<a href=3D"mailto:cabo@tzi.org" =
class=3D"">cabo@tzi.org</a>&gt;, "Goeran Selander" &lt;<a =
href=3D"mailto:goran.selander@ericsson.com" =
class=3D"">goran.selander@ericsson.com</a>&gt;, "Stefanie Gerdes" &lt;<a =
href=3D"mailto:gerdes@tzi.org" class=3D"">gerdes@tzi.org</a>&gt;<br =
class=3D""></span></div><br class=3D""><div class=3D""><div class=3D""><br=
 class=3D"">A new version of I-D, draft-ietf-ace-actors-06.txt<br =
class=3D"">has been successfully submitted by Carsten Bormann and posted =
to the<br class=3D"">IETF repository.<br class=3D""><br =
class=3D"">Name:<span class=3D"Apple-tab-span" style=3D"white-space:pre">	=
</span><span class=3D"Apple-tab-span" style=3D"white-space:pre">	=
</span>draft-ietf-ace-actors<br class=3D"">Revision:<span =
class=3D"Apple-tab-span" style=3D"white-space:pre">	</span>06<br =
class=3D"">Title:<span class=3D"Apple-tab-span" style=3D"white-space:pre">=
	</span><span class=3D"Apple-tab-span" style=3D"white-space:pre">	=
</span>An architecture for authorization in constrained environments<br =
class=3D"">Document date:<span class=3D"Apple-tab-span" =
style=3D"white-space:pre">	</span>2017-11-14<br =
class=3D"">Group:<span class=3D"Apple-tab-span" style=3D"white-space:pre">=
	</span><span class=3D"Apple-tab-span" style=3D"white-space:pre">	=
</span>ace<br class=3D"">Pages:<span class=3D"Apple-tab-span" =
style=3D"white-space:pre">	</span><span class=3D"Apple-tab-span" =
style=3D"white-space:pre">	</span>33<br class=3D"">URL: =
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<a =
href=3D"https://www.ietf.org/internet-drafts/draft-ietf-ace-actors-06.txt"=
 =
class=3D"">https://www.ietf.org/internet-drafts/draft-ietf-ace-actors-06.t=
xt</a><br class=3D"">Status: =
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<a =
href=3D"https://datatracker.ietf.org/doc/draft-ietf-ace-actors/" =
class=3D"">https://datatracker.ietf.org/doc/draft-ietf-ace-actors/</a><br =
class=3D"">Htmlized: &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<a =
href=3D"https://tools.ietf.org/html/draft-ietf-ace-actors-06" =
class=3D"">https://tools.ietf.org/html/draft-ietf-ace-actors-06</a><br =
class=3D"">Htmlized: &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<a =
href=3D"https://datatracker.ietf.org/doc/html/draft-ietf-ace-actors-06" =
class=3D"">https://datatracker.ietf.org/doc/html/draft-ietf-ace-actors-06<=
/a><br class=3D"">Diff: =
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<a =
href=3D"https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-ace-actors-06" =
class=3D"">https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-ace-actors-06</a=
><br class=3D""><br class=3D"">Abstract:<br class=3D""> =
&nbsp;&nbsp;Constrained-node networks are networks where some nodes have =
severe<br class=3D""> &nbsp;&nbsp;constraints on code size, state =
memory, processing capabilities, user<br class=3D""> =
&nbsp;&nbsp;interface, power and communication bandwidth (RFC 7228).<br =
class=3D""><br class=3D""> &nbsp;&nbsp;This document provides =
terminology, and identifies the elements that<br class=3D""> =
&nbsp;&nbsp;an architecture needs to address, providing a problem =
statement, for<br class=3D""> &nbsp;&nbsp;authentication and =
authorization in these networks.</div></div></blockquote><br =
class=3D""></div></div></body></html>=

--Apple-Mail=_8DD79E1E-3B50-4D55-B093-3B715751BC17--


From nobody Mon Nov 13 18:57:20 2017
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Subject: Re: [Ace] some thoughts about vanderstok-ace-coap-est
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--=-=-=
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Carsten Bormann <cabo@tzi.org> wrote:
    >> I'm less convinced that we ought to be using this mechanism to short=
en
    >> /.well-known/est to /est (why stop there? can't we go to /?)

    > Why do you think that a node can only have one EST endpoint?

It could have hundreds, I agree.
Could also have hundreds of different IPs in the /64 answer.

If it had more than one, then shortening would have to be done differently
for each, I think.

We already have /.well-known/est as well.

    > It should be possible to have many, and the client should be able to
    > choose the one that is actually doing the right thing for them.

I'm pretty sure that I have no way to describe the logic to a client.


    >> It seems like maybe a 301-like (Moved Permantly) reply from
    >> /.well-known/est/*, but CoAP doesn't have 301 codes=E2=80=A6.

    > (The link-format self-description is exactly the replacement for the
    > HTTP 301 here.  Same number of roundtrips...)

yes, that's a good point, except that for the end-point that has the single
end point at /.well-known/est, then there is no 301.

=2D-
Michael Richardson <mcr+IETF@sandelman.ca>, Sandelman Software Works
 -=3D IPv6 IoT consulting =3D-




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--=-=-=--


From nobody Tue Nov 14 01:59:25 2017
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Subject: [Ace] Questions about draft-ietf-ace-oauth-authz
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Hello ACE,

during the IETF 100 session there were a number of questions on 
draft-ietf-ace-oauth-authz that I would like to bring to the list for 
feedback:

1.) Currently the framework requires the use of CBOR as data object 
format and of parameter name abbreviations. Some comments voiced the 
opinion that these requirements should be relaxed and the choice left to 
the profiles.
I see the following options:

a.) Keep it as it is (i.e. CBOR and parameter name abbreviations REQUIRED)

b.) Remove all requirements (i.e. data format totally up to the profiles)

c.) RECOMMEND the use of CBOR and parameter abbreviations (allowing 
profiles to specify something else)

What does the group think we should do?


2.) Should the work on Client Token 
(https://tools.ietf.org/html/draft-ietf-ace-oauth-authz-08#section-5.7.4) 
be in the draft or moved out to a separate document?

Background: We designed Client Token to address the use cases where the 
client has intermittent connectivity and needs to receive information 
from the AS.

3.) What is the relationship to the Token Binding Work at OAuth 
(https://datatracker.ietf.org/doc/draft-ietf-oauth-token-binding/) ?

3-bis.) To me it seems like this could go into a profile of the ACE 
framework. Would someone be willing to write such a draft?


4.) What parameters to put into the response to an unauthorized request 
(https://tools.ietf.org/html/draft-ietf-ace-oauth-authz-08#section-5.1.2)?

Jim Schaad suggested to add information about the audience and scope the 
RS expects to grant access to the given resource
(https://mailarchive.ietf.org/arch/msg/ace/iObf0ECho--7FCYWBRQYUHtOsBw)

We have had some discussion on this topic already, but I have not seen a 
conclusive "decision" by the group (if such a thing can exist) as to 
what to do.

5.) Francesca suggested to allow the AS to return a list of possible 
profiles to the client in response to an access token request. Currently 
only one profile is selected and optionally returned by the AS (it could 
even be implicit and not be returned at all).

Background: The way I was thinking this should work was that both the 
client and the RS need to be registered at the AS in order for the 
exchanges to work. I made the assumption 
(https://tools.ietf.org/html/draft-ietf-ace-oauth-authz-08#appendix-D) 
that the AS would already know which profiles both C and RS support, and 
thus just select the ideal one.

What does the group think, should we instead allow for a list of 
profiles and let the client select which one to use?


Regards,

Ludwig

-- 
Ludwig Seitz, PhD
Security Lab, RISE SICS
Phone +46(0)70-349 92 51


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Subject: Re: [Ace] Questions about draft-ietf-ace-oauth-authz
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> On Nov 14, 2017, at 17:59, Ludwig Seitz <ludwig.seitz@ri.se> wrote:
>=20
> Hello ACE,
>=20
> during the IETF 100 session there were a number of questions on =
draft-ietf-ace-oauth-authz that I would like to bring to the list for =
feedback:
>=20
> 1.) Currently the framework requires the use of CBOR as data object =
format and of parameter name abbreviations. Some comments voiced the =
opinion that these requirements should be relaxed and the choice left to =
the profiles.
> I see the following options:
>=20
> a.) Keep it as it is (i.e. CBOR and parameter name abbreviations =
REQUIRED)
>=20
> b.) Remove all requirements (i.e. data format totally up to the =
profiles)
>=20
> c.) RECOMMEND the use of CBOR and parameter abbreviations (allowing =
profiles to specify something else)
>=20
> What does the group think we should do?

Clearly (c) (RECOMMEND).
If is good to have a common way of doing this, but if a profile has a =
good reason to deviate, state that reason and deviate.

> 2.) Should the work on Client Token =
(https://tools.ietf.org/html/draft-ietf-ace-oauth-authz-08#section-5.7.4) =
be in the draft or moved out to a separate document?
>=20
> Background: We designed Client Token to address the use cases where =
the client has intermittent connectivity and needs to receive =
information from the AS.

No opinion on document splitting.

> 4.) What parameters to put into the response to an unauthorized =
request =
(https://tools.ietf.org/html/draft-ietf-ace-oauth-authz-08#section-5.1.2)?=

>=20
> Jim Schaad suggested to add information about the audience and scope =
the RS expects to grant access to the given resource
> =
(https://mailarchive.ietf.org/arch/msg/ace/iObf0ECho--7FCYWBRQYUHtOsBw)
>=20
> We have had some discussion on this topic already, but I have not seen =
a conclusive "decision" by the group (if such a thing can exist) as to =
what to do.

It should be up to the deployment what it wants to reveal here.
So do provide a way to include this information, but do not require it.

> 5.) Francesca suggested to allow the AS to return a list of possible =
profiles to the client in response to an access token request. Currently =
only one profile is selected and optionally returned by the AS (it could =
even be implicit and not be returned at all).
>=20
> Background: The way I was thinking this should work was that both the =
client and the RS need to be registered at the AS in order for the =
exchanges to work. I made the assumption =
(https://tools.ietf.org/html/draft-ietf-ace-oauth-authz-08#appendix-D) =
that the AS would already know which profiles both C and RS support, and =
thus just select the ideal one.
>=20
> What does the group think, should we instead allow for a list of =
profiles and let the client select which one to use?

I=E2=80=99m not quite convinced about the use case, but I also don=E2=80=99=
t see much harm (this is a less-constrained, horizontal protocol).  SAM =
(AS) won=E2=80=99t necessarily be =E2=80=9Cclosely familiar=E2=80=9D =
with C, so C (or the CAM component of it) may be able to make a better =
choice.

Gr=C3=BC=C3=9Fe, Carsten


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From: peter van der Stok <stokcons@xs4all.nl>
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Hi,

Jim suggests to keep both the /.well-known/est/* entry-points and the 
optional short ones.
Seems the right approach to me and gives the application the opportunity 
to shorten the request URIs.


Michael Richardson schreef op 2017-11-14 03:57:
> Carsten Bormann <cabo@tzi.org> wrote:
>     >> I'm less convinced that we ought to be using this mechanism to 
> shorten
>     >> /.well-known/est to /est (why stop there? can't we go to /?)
> 
>     > Why do you think that a node can only have one EST endpoint?
> 
> It could have hundreds, I agree.
> Could also have hundreds of different IPs in the /64 answer.
> 
> If it had more than one, then shortening would have to be done 
> differently
> for each, I think.
> 
> We already have /.well-known/est as well.
> 
>     > It should be possible to have many, and the client should be able 
> to
>     > choose the one that is actually doing the right thing for them.
> 
> I'm pretty sure that I have no way to describe the logic to a client.
> 
> 
>     >> It seems like maybe a 301-like (Moved Permantly) reply from
>     >> /.well-known/est/*, but CoAP doesn't have 301 codes….
> 
>     > (The link-format self-description is exactly the replacement for 
> the
>     > HTTP 301 here.  Same number of roundtrips...)
> 
> yes, that's a good point, except that for the end-point that has the 
> single
> end point at /.well-known/est, then there is no 301.
> 
> --
> Michael Richardson <mcr+IETF@sandelman.ca>, Sandelman Software Works
>  -= IPv6 IoT consulting =-
> 
> 
> 
> 
> _______________________________________________
> Ace mailing list
> Ace@ietf.org
> https://www.ietf.org/mailman/listinfo/ace


From nobody Wed Nov 15 12:36:27 2017
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peter van der Stok <stokcons@xs4all.nl> wrote:
    > Jim suggests to keep both the /.well-known/est/* entry-points and the
    > optional short ones.  Seems the right approach to me and gives the
    > application the opportunity to shorten the request URIs.

I agree.
Do you think that est/requestvoucher should also be shortened to ../est/rv?

I'm using the CoAP server rails plugin, "david"; I'm trying to add the ?rt=XXX
mechanism to it.  As is, it actually returns a value for every single defined
target:
I.e. it returns
     </.well-known/est/requestvoucher>,</.well-known/est/voucher_status>,<...>

I attempting to fix this.



--
Michael Richardson <mcr+IETF@sandelman.ca>, Sandelman Software Works
 -= IPv6 IoT consulting =-




From nobody Thu Nov 16 06:32:39 2017
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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Authentication and Authorization for Constrained Environments WG of the IETF.

        Title           : Authentication and Authorization for Constrained Environments (ACE)
        Authors         : Ludwig Seitz
                          Goeran Selander
                          Erik Wahlstroem
                          Samuel Erdtman
                          Hannes Tschofenig
	Filename        : draft-ietf-ace-oauth-authz-09.txt
	Pages           : 66
	Date            : 2017-11-16

Abstract:
   This specification defines a framework for authentication and
   authorization in Internet of Things (IoT) environments.  The
   framework is based on a set of building blocks including OAuth 2.0
   and CoAP, thus making a well-known and widely used authorization
   solution suitable for IoT devices.  Existing specifications are used
   where possible, but where the constraints of IoT devices require it,
   extensions are added and profiles are defined.


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-ace-oauth-authz/

There are also htmlized versions available at:
https://tools.ietf.org/html/draft-ietf-ace-oauth-authz-09
https://datatracker.ietf.org/doc/html/draft-ietf-ace-oauth-authz-09

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-ace-oauth-authz-09


Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org.

Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/


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Subject: [Ace] Fwd: New Version Notification for draft-ietf-ace-oauth-authz-09.txt
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Hello ACE,

as promised during the ACE session, here is an update that addresses the 
IANA issues that were raised by Mike Jones (and some more).

This update also rearranges the IANA section in a logical way and fixes 
a number of inconsistencies throughout the draft (mostly related to IANA 
definitions).

/Ludwig


-------- Forwarded Message --------
Subject: New Version Notification for draft-ietf-ace-oauth-authz-09.txt
Date: Thu, 16 Nov 2017 06:32:32 -0800
From: internet-drafts@ietf.org
To: Ludwig Seitz <ludwig.seitz@ri.se>, Samuel Erdtman 
<erdtman@spotify.com>, Hannes Tschofenig <hannes.tschofenig@arm.com>, 
Goeran Selander <goran.selander@ericsson.com>, Erik Wahlstroem 
<erik@wahlstromtekniska.se>


A new version of I-D, draft-ietf-ace-oauth-authz-09.txt
has been successfully submitted by Ludwig Seitz and posted to the
IETF repository.

Name:		draft-ietf-ace-oauth-authz
Revision:	09
Title:		Authentication and Authorization for Constrained Environments (ACE)
Document date:	2017-11-16
Group:		ace
Pages:		66
URL: 
https://www.ietf.org/internet-drafts/draft-ietf-ace-oauth-authz-09.txt
Status:         https://datatracker.ietf.org/doc/draft-ietf-ace-oauth-authz/
Htmlized:       https://tools.ietf.org/html/draft-ietf-ace-oauth-authz-09
Htmlized: 
https://datatracker.ietf.org/doc/html/draft-ietf-ace-oauth-authz-09
Diff: 
https://www.ietf.org/rfcdiff?url2=draft-ietf-ace-oauth-authz-09

Abstract:
    This specification defines a framework for authentication and
    authorization in Internet of Things (IoT) environments.  The
    framework is based on a set of building blocks including OAuth 2.0
    and CoAP, thus making a well-known and widely used authorization
    solution suitable for IoT devices.  Existing specifications are used
    where possible, but where the constraints of IoT devices require it,
    extensions are added and profiles are defined.

 


Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org.

The IETF Secretariat


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Subject: [Ace] DTLS proxy in EST-coaps
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--=-=-=
Content-Type: text/plain
Content-Transfer-Encoding: quoted-printable


Hi,

I'm slowly absorbing the contents of draft-vanderstok-ace-coap-est-02.
I'm building draft-ietf-6tisch-zerotouch-join with the assumption that it
might run over DTLS, use EDHOC w/OSCORE, or some DTLS-over-CoAP mechanism.

I looked through section 6, and I don't understand why COAPS would be used
From=20the Registrar through an ESTcoaps-to-HTTPS Proxy to the MASA. The
Registrar as not in the constrained networks, and can speak HTTPS just fine.
That's why we proxy the COAPS traffic to the Registrar, so that the
Registrar does not have to live (entirely) in the constrained network.

So, in the ANIMA BRSKI context, we have the Join Proxy to connect the insec=
ure
(unencrypted) network with the JRC as we can not assume the registar (JRC) =
is
within radio distance of all pledges.

For EDHOC and DTLS-over-COAP, we can use the option as described
in draft-ietf-6tisch-minimal-security section 5.1 to keep the proxy
stateless.

For DTLS, I thought we had a few IDs on how to relay DTLS in a stateless ma=
nner.
I can't seem to find any (Yes, I did look through expired drafts too).

Are there some options for DTLS?
Is there a way to statelessly (on the join proxy) relay traffic?

=2D-
Michael Richardson <mcr+IETF@sandelman.ca>, Sandelman Software Works
 -=3D IPv6 IoT consulting =3D-




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From nobody Thu Nov 16 18:09:39 2017
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Date: Fri, 17 Nov 2017 03:09:35 +0100
From: peter van der Stok <stokcons@xs4all.nl>
To: Michael Richardson <mcr+ietf@sandelman.ca>
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Subject: Re: [Ace] DTLS proxy in EST-coaps
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> I'm slowly absorbing the contents of draft-vanderstok-ace-coap-est-02.
> I'm building draft-ietf-6tisch-zerotouch-join with the assumption that 
> it
> might run over DTLS, use EDHOC w/OSCORE, or some DTLS-over-CoAP 
> mechanism.

Good
> 
> I looked through section 6, and I don't understand why COAPS would be 
> used
> From the Registrar through an ESTcoaps-to-HTTPS Proxy to the MASA. The
> Registrar as not in the constrained networks, and can speak HTTPS just 
> fine.
> That's why we proxy the COAPS traffic to the Registrar, so that the
> Registrar does not have to live (entirely) in the constrained network.

If this is a unrealistic use case, it should go from the document.
> 
> So, in the ANIMA BRSKI context, we have the Join Proxy to connect the 
> insecure
> (unencrypted) network with the JRC as we can not assume the registar 
> (JRC) is
> within radio distance of all pledges.
> 
> For EDHOC and DTLS-over-COAP, we can use the option as described
> in draft-ietf-6tisch-minimal-security section 5.1 to keep the proxy
> stateless.
> 
> For DTLS, I thought we had a few IDs on how to relay DTLS in a 
> stateless manner.
> I can't seem to find any (Yes, I did look through expired drafts too).

You mean expired est-coaps drafts?
Indeed, the draft never considered these, assuming they were off topic 
and were adequately treated elsewhere.
The next version of est-coaps draft will be less BRSKI oriented and I 
think the subject of stateless join proxy is off topic. (BTW they are 
systematically called "circuit proxy" in keyinfra draft).
> 
> Are there some options for DTLS?
> Is there a way to statelessly (on the join proxy) relay traffic?
> 
> --
> Michael Richardson <mcr+IETF@sandelman.ca>, Sandelman Software Works
>  -= IPv6 IoT consulting =-
> 
> 
> 
> 
> _______________________________________________
> Ace mailing list
> Ace@ietf.org
> https://www.ietf.org/mailman/listinfo/ace


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From: Sandeep Kumar <sandeep.kumar@philips.com>
To: Michael Richardson <mcr+ietf@sandelman.ca>, "consultancy@vanderstok.org" <consultancy@vanderstok.org>
CC: "ace@ietf.org" <ace@ietf.org>
Thread-Topic: [Ace] DTLS proxy in EST-coaps
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Archived-At: <https://mailarchive.ietf.org/arch/msg/ace/-lABn7kMItgWx4qecJdXs7V5Hhs>
Subject: Re: [Ace] DTLS proxy in EST-coaps
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DTLS relaying draft was in DICE wg. The WG was not chartered for the activi=
ty. Other SDOs picked it up and filed the gaps.

Sandeep
________________________________
From: Ace <ace-bounces@ietf.org> on behalf of peter van der Stok <stokcons@=
xs4all.nl>
Sent: Friday, November 17, 2017 3:09:35 AM
To: Michael Richardson
Cc: ace@ietf.org
Subject: Re: [Ace] DTLS proxy in EST-coaps


> I'm slowly absorbing the contents of draft-vanderstok-ace-coap-est-02.
> I'm building draft-ietf-6tisch-zerotouch-join with the assumption that
> it
> might run over DTLS, use EDHOC w/OSCORE, or some DTLS-over-CoAP
> mechanism.

Good
>
> I looked through section 6, and I don't understand why COAPS would be
> used
> From the Registrar through an ESTcoaps-to-HTTPS Proxy to the MASA. The
> Registrar as not in the constrained networks, and can speak HTTPS just
> fine.
> That's why we proxy the COAPS traffic to the Registrar, so that the
> Registrar does not have to live (entirely) in the constrained network.

If this is a unrealistic use case, it should go from the document.
>
> So, in the ANIMA BRSKI context, we have the Join Proxy to connect the
> insecure
> (unencrypted) network with the JRC as we can not assume the registar
> (JRC) is
> within radio distance of all pledges.
>
> For EDHOC and DTLS-over-COAP, we can use the option as described
> in draft-ietf-6tisch-minimal-security section 5.1 to keep the proxy
> stateless.
>
> For DTLS, I thought we had a few IDs on how to relay DTLS in a
> stateless manner.
> I can't seem to find any (Yes, I did look through expired drafts too).

You mean expired est-coaps drafts?
Indeed, the draft never considered these, assuming they were off topic
and were adequately treated elsewhere.
The next version of est-coaps draft will be less BRSKI oriented and I
think the subject of stateless join proxy is off topic. (BTW they are
systematically called "circuit proxy" in keyinfra draft).
>
> Are there some options for DTLS?
> Is there a way to statelessly (on the join proxy) relay traffic?
>
> --
> Michael Richardson <mcr+IETF@sandelman.ca>, Sandelman Software Works
>  -=3D IPv6 IoT consulting =3D-
>
>
>
>
> _______________________________________________
> Ace mailing list
> Ace@ietf.org
> https://www.ietf.org/mailman/listinfo/ace

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DTLS relaying draft was in DICE wg. The WG was not chartered for the activi=
ty. Other SDOs picked it up and filed the gaps.<br>
<br>
Sandeep
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yle=3D"font-size:11pt" color=3D"#000000"><b>From:</b> Ace &lt;ace-bounces@i=
etf.org&gt; on behalf of peter van der Stok &lt;stokcons@xs4all.nl&gt;<br>
<b>Sent:</b> Friday, November 17, 2017 3:09:35 AM<br>
<b>To:</b> Michael Richardson<br>
<b>Cc:</b> ace@ietf.org<br>
<b>Subject:</b> Re: [Ace] DTLS proxy in EST-coaps</font>
<div>&nbsp;</div>
</div>
<div class=3D"BodyFragment"><font size=3D"2"><span style=3D"font-size:10pt;=
">
<div class=3D"PlainText"><br>
&gt; I'm slowly absorbing the contents of draft-vanderstok-ace-coap-est-02.=
<br>
&gt; I'm building draft-ietf-6tisch-zerotouch-join with the assumption that=
 <br>
&gt; it<br>
&gt; might run over DTLS, use EDHOC w/OSCORE, or some DTLS-over-CoAP <br>
&gt; mechanism.<br>
<br>
Good<br>
&gt; <br>
&gt; I looked through section 6, and I don't understand why COAPS would be =
<br>
&gt; used<br>
&gt; From the Registrar through an ESTcoaps-to-HTTPS Proxy to the MASA. The=
<br>
&gt; Registrar as not in the constrained networks, and can speak HTTPS just=
 <br>
&gt; fine.<br>
&gt; That's why we proxy the COAPS traffic to the Registrar, so that the<br=
>
&gt; Registrar does not have to live (entirely) in the constrained network.=
<br>
<br>
If this is a unrealistic use case, it should go from the document.<br>
&gt; <br>
&gt; So, in the ANIMA BRSKI context, we have the Join Proxy to connect the =
<br>
&gt; insecure<br>
&gt; (unencrypted) network with the JRC as we can not assume the registar <=
br>
&gt; (JRC) is<br>
&gt; within radio distance of all pledges.<br>
&gt; <br>
&gt; For EDHOC and DTLS-over-COAP, we can use the option as described<br>
&gt; in draft-ietf-6tisch-minimal-security section 5.1 to keep the proxy<br=
>
&gt; stateless.<br>
&gt; <br>
&gt; For DTLS, I thought we had a few IDs on how to relay DTLS in a <br>
&gt; stateless manner.<br>
&gt; I can't seem to find any (Yes, I did look through expired drafts too).=
<br>
<br>
You mean expired est-coaps drafts?<br>
Indeed, the draft never considered these, assuming they were off topic <br>
and were adequately treated elsewhere.<br>
The next version of est-coaps draft will be less BRSKI oriented and I <br>
think the subject of stateless join proxy is off topic. (BTW they are <br>
systematically called &quot;circuit proxy&quot; in keyinfra draft).<br>
&gt; <br>
&gt; Are there some options for DTLS?<br>
&gt; Is there a way to statelessly (on the join proxy) relay traffic?<br>
&gt; <br>
&gt; --<br>
&gt; Michael Richardson &lt;mcr&#43;IETF@sandelman.ca&gt;, Sandelman Softwa=
re Works<br>
&gt;&nbsp; -=3D IPv6 IoT consulting =3D-<br>
&gt; <br>
&gt; <br>
&gt; <br>
&gt; <br>
&gt; _______________________________________________<br>
&gt; Ace mailing list<br>
&gt; Ace@ietf.org<br>
&gt; <a href=3D"https://www.ietf.org/mailman/listinfo/ace">https://www.ietf=
.org/mailman/listinfo/ace</a><br>
<br>
_______________________________________________<br>
Ace mailing list<br>
Ace@ietf.org<br>
<a href=3D"https://www.ietf.org/mailman/listinfo/ace">https://www.ietf.org/=
mailman/listinfo/ace</a><br>
</div>
</span></font></div>
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From nobody Fri Nov 17 01:02:51 2017
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From: Olaf Bergmann <bergmann@tzi.org>
To: Ludwig Seitz <ludwig.seitz@ri.se>
Cc: "ace\@ietf.org" <ace@ietf.org>
References: <099e2b57-ca4a-6fd8-db42-a74365f90753@ri.se>
Date: Fri, 17 Nov 2017 10:02:38 +0100
In-Reply-To: <099e2b57-ca4a-6fd8-db42-a74365f90753@ri.se> (Ludwig Seitz's message of "Tue, 14 Nov 2017 10:59:17 +0100")
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Subject: Re: [Ace] Questions about draft-ietf-ace-oauth-authz
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Ludwig Seitz <ludwig.seitz@ri.se> writes:

> 1.) Currently the framework requires the use of CBOR as data object
> format and of parameter name abbreviations. Some comments voiced the
> opinion that these requirements should be relaxed and the choice left
> to the profiles.
> I see the following options:
>
> a.) Keep it as it is (i.e. CBOR and parameter name abbreviations REQUIRED)
>
> b.) Remove all requirements (i.e. data format totally up to the profiles)
>
> c.) RECOMMEND the use of CBOR and parameter abbreviations (allowing
> profiles to specify something else)
>
> What does the group think we should do?

I am in favor for (a) but (c) would be the more flexible choice for a
future-proof framework.

> 2.) Should the work on Client Token
> (https://tools.ietf.org/html/draft-ietf-ace-oauth-authz-08#section-5.7.4)
> be in the draft or moved out to a separate document?
>
> Background: We designed Client Token to address the use cases where
> the client has intermittent connectivity and needs to receive
> information from the AS.

No opinion here.

> 3.) What is the relationship to the Token Binding Work at OAuth
> (https://datatracker.ietf.org/doc/draft-ietf-oauth-token-binding/) ?
>
> 3-bis.) To me it seems like this could go into a profile of the ACE
> framework. Would someone be willing to write such a draft?
>
>
> 4.) What parameters to put into the response to an unauthorized
> request
> (https://tools.ietf.org/html/draft-ietf-ace-oauth-authz-08#section-5.1.2)?
>
> Jim Schaad suggested to add information about the audience and scope
> the RS expects to grant access to the given resource
> (https://mailarchive.ietf.org/arch/msg/ace/iObf0ECho--7FCYWBRQYUHtOsBw)
>
> We have had some discussion on this topic already, but I have not seen
> a conclusive "decision" by the group (if such a thing can exist) as to
> what to do.

I suggest to add this information (as optional fields) to the
response so the client knows what to request from AS.

> 5.) Francesca suggested to allow the AS to return a list of possible
> profiles to the client in response to an access token
> request. Currently only one profile is selected and optionally
> returned by the AS (it could even be implicit and not be returned at
> all).
>
> Background: The way I was thinking this should work was that both the
> client and the RS need to be registered at the AS in order for the
> exchanges to work. I made the assumption
> (https://tools.ietf.org/html/draft-ietf-ace-oauth-authz-08#appendix-D)
> that the AS would already know which profiles both C and RS support,
> and thus just select the ideal one.
>
> What does the group think, should we instead allow for a list of
> profiles and let the client select which one to use?

I think that negotiating the profile between C and AS is inevitable but
returning a list of profiles with the AS-to-Client response might be
difficult because there might be profile-specific claims that need to be
included as well.

I prefer a client-driven negotiation mechanism where the client may send
the list of profiles it supports, and the server picks one of this list
or returns an error if the resource server does not support any of
these. If the client does not send this list, AS just picks one as
described by Ludwig.

Gr=C3=BC=C3=9Fe
Olaf


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Subject: Re: [Ace] Questions about draft-ietf-ace-oauth-authz
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On 2017-11-17 10:02, Olaf Bergmann wrote:
> Ludwig Seitz <ludwig.seitz@ri.se> writes:
>
>> 5.) Francesca suggested to allow the AS to return a list of possible
>> profiles to the client in response to an access token
>> request. Currently only one profile is selected and optionally
>> returned by the AS (it could even be implicit and not be returned at
>> all).
>>
>> Background: The way I was thinking this should work was that both the
>> client and the RS need to be registered at the AS in order for the
>> exchanges to work. I made the assumption
>> (https://tools.ietf.org/html/draft-ietf-ace-oauth-authz-08#appendix-D)
>> that the AS would already know which profiles both C and RS support,
>> and thus just select the ideal one.
>>
>> What does the group think, should we instead allow for a list of
>> profiles and let the client select which one to use?
> 
> I think that negotiating the profile between C and AS is inevitable but
> returning a list of profiles with the AS-to-Client response might be
> difficult because there might be profile-specific claims that need to be
> included as well.
> 
> I prefer a client-driven negotiation mechanism where the client may send
> the list of profiles it supports, and the server picks one of this list
> or returns an error if the resource server does not support any of
> these. If the client does not send this list, AS just picks one as
> described by Ludwig.
> 
> Grüße
> Olaf
> 


Interesting point. We had a negotiation mechanism for profiles in an 
earlier version of the draft, and decided to pull it out again because 
it felt over-engineered, given the fact that the AS would know what 
profiles both C and RS support.

Regards,

Ludwig

-- 
Ludwig Seitz, PhD
Security Lab, RISE SICS
Phone +46(0)70-349 92 51


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Subject: Re: [Ace] DTLS proxy in EST-coaps
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--=-=-=
Content-Type: text/plain


peter van der Stok <stokcons@xs4all.nl> wrote:
    >> So, in the ANIMA BRSKI context, we have the Join Proxy to connect the
    >> insecure (unencrypted) network with the JRC as we can not assume the
    >> registar (JRC) is within radio distance of all pledges.
    >>
    >> For EDHOC and DTLS-over-COAP, we can use the option as described in
    >> draft-ietf-6tisch-minimal-security section 5.1 to keep the proxy
    >> stateless.
    >>
    >> For DTLS, I thought we had a few IDs on how to relay DTLS in a
    >> stateless manner.  I can't seem to find any (Yes, I did look through
    >> expired drafts too).

    > You mean expired est-coaps drafts?  Indeed, the draft never considered
    > these, assuming they were off topic and were adequately treated
    > elsewhere.

I don't think that it was est-coaps.
I think it was maybe 2 years ago, there were some proposals to proxy DTLS in
a stateless way.

I was sure at the time that a solution on top of CoAP would be better, so I
didn't pay a lot of attention.

--
Michael Richardson <mcr+IETF@sandelman.ca>, Sandelman Software Works
 -= IPv6 IoT consulting =-




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From: Michael Richardson <mcr+ietf@sandelman.ca>
To: Sandeep Kumar <sandeep.kumar@philips.com>, "ace\@ietf.org" <ace@ietf.org>
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Subject: Re: [Ace] DTLS proxy in EST-coaps
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Sandeep Kumar <sandeep.kumar@philips.com> wrote:
    > DTLS relaying draft was in DICE wg. The WG was not chartered for the
    > activity. Other SDOs picked it up and filed the gaps.

    mcr> For DTLS, I thought we had a few IDs on how to relay DTLS in a
    mcr> stateless manner.  I can't seem to find any (Yes, I did look through
    mcr> expired drafts
    mcr> too).

I was reminded in a private email that the document I wanted was yours:
  https://tools.ietf.org/html/draft-kumar-dice-dtls-relay-02

but it does not detail what the DRY header would look like.

I assume it has to fit into DTLS clothing so that it can be demux'ed.
I was hoping that your document had already figured that part out.
Perhaps you have some thinking you can share?

Which SDOs picked up the gap, and where are the documents?
Were there IANA allocations required?

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From: Samuel Erdtman <samuel@erdtman.se>
Date: Fri, 17 Nov 2017 15:47:36 +0100
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Subject: Re: [Ace] Questions about draft-ietf-ace-oauth-authz
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see inline

On Tue, Nov 14, 2017 at 10:59 AM, Ludwig Seitz <ludwig.seitz@ri.se> wrote:

> Hello ACE,
>
> during the IETF 100 session there were a number of questions on
> draft-ietf-ace-oauth-authz that I would like to bring to the list for
> feedback:
>
> 1.) Currently the framework requires the use of CBOR as data object format
> and of parameter name abbreviations. Some comments voiced the opinion that
> these requirements should be relaxed and the choice left to the profiles.
> I see the following options:
>
> a.) Keep it as it is (i.e. CBOR and parameter name abbreviations REQUIRED)
>
> b.) Remove all requirements (i.e. data format totally up to the profiles)
>
> c.) RECOMMEND the use of CBOR and parameter abbreviations (allowing
> profiles to specify something else)
>
> What does the group think we should do?
>

I vote for *c*


>
>
> 2.) Should the work on Client Token (https://tools.ietf.org/html/d
> raft-ietf-ace-oauth-authz-08#section-5.7.4) be in the draft or moved out
> to a separate document?
>
> Background: We designed Client Token to address the use cases where the
> client has intermittent connectivity and needs to receive information from
> the AS.
>

I vote for separate document for Client Token, I like the idea but I think
it comes as a natural extension to the framework.


>
> 3.) What is the relationship to the Token Binding Work at OAuth (
> https://datatracker.ietf.org/doc/draft-ietf-oauth-token-binding/) ?
>
> 3-bis.) To me it seems like this could go into a profile of the ACE
> framework. Would someone be willing to write such a draft?
>

Agree


>
> 4.) What parameters to put into the response to an unauthorized request (
> https://tools.ietf.org/html/draft-ietf-ace-oauth-authz-08#section-5.1.2)?
>
> Jim Schaad suggested to add information about the audience and scope the
> RS expects to grant access to the given resource
> (https://mailarchive.ietf.org/arch/msg/ace/iObf0ECho--7FCYWBRQYUHtOsBw)
>


I liked Carstens comment  "It should be up to the deployment what it wants
to reveal here. So do provide a way to include this information, but do not
require it."
So +1 on that.


> We have had some discussion on this topic already, but I have not seen a
> conclusive "decision" by the group (if such a thing can exist) as to what
> to do.
>
> 5.) Francesca suggested to allow the AS to return a list of possible
> profiles to the client in response to an access token request. Currently
> only one profile is selected and optionally returned by the AS (it could
> even be implicit and not be returned at all).
>
> Background: The way I was thinking this should work was that both the
> client and the RS need to be registered at the AS in order for the
> exchanges to work. I made the assumption (https://tools.ietf.org/html/d
> raft-ietf-ace-oauth-authz-08#appendix-D) that the AS would already know
> which profiles both C and RS support, and thus just select the ideal one.
>
> What does the group think, should we instead allow for a list of profiles
> and let the client select which one to use?
>

I think AS should return one profile, I would like to avoid negotiation,
for now at least.


>
>
> Regards,
>
> Ludwig
>
> --
> Ludwig Seitz, PhD
> Security Lab, RISE SICS
> Phone +46(0)70-349 92 51
>
> _______________________________________________
> Ace mailing list
> Ace@ietf.org
> https://www.ietf.org/mailman/listinfo/ace
>

--089e0825458c512c8b055e2ed1b1
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Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr">see inline<br><div class=3D"gmail_extra"><br><div class=3D=
"gmail_quote">On Tue, Nov 14, 2017 at 10:59 AM, Ludwig Seitz <span dir=3D"l=
tr">&lt;<a href=3D"mailto:ludwig.seitz@ri.se" target=3D"_blank">ludwig.seit=
z@ri.se</a>&gt;</span> wrote:<br><blockquote class=3D"gmail_quote" style=3D=
"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-le=
ft:1ex">Hello ACE,<br>
<br>
during the IETF 100 session there were a number of questions on draft-ietf-=
ace-oauth-authz that I would like to bring to the list for feedback:<br>
<br>
1.) Currently the framework requires the use of CBOR as data object format =
and of parameter name abbreviations. Some comments voiced the opinion that =
these requirements should be relaxed and the choice left to the profiles.<b=
r>
I see the following options:<br>
<br>
a.) Keep it as it is (i.e. CBOR and parameter name abbreviations REQUIRED)<=
br>
<br>
b.) Remove all requirements (i.e. data format totally up to the profiles)<b=
r>
<br>
c.) RECOMMEND the use of CBOR and parameter abbreviations (allowing profile=
s to specify something else)<br>
<br>
What does the group think we should do?<br></blockquote><div><br></div><div=
>I vote for <b>c</b><br></div><div>=C2=A0</div><blockquote class=3D"gmail_q=
uote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,2=
04);padding-left:1ex">
<br>
<br>
2.) Should the work on Client Token (<a href=3D"https://tools.ietf.org/html=
/draft-ietf-ace-oauth-authz-08#section-5.7.4" rel=3D"noreferrer" target=3D"=
_blank">https://tools.ietf.org/html/d<wbr>raft-ietf-ace-oauth-authz-08#s<wb=
r>ection-5.7.4</a>) be in the draft or moved out to a separate document?<br=
>
<br>
Background: We designed Client Token to address the use cases where the cli=
ent has intermittent connectivity and needs to receive information from the=
 AS.<br></blockquote><div><br></div><div>I vote for separate document for C=
lient Token, I like the idea but I think it comes as a natural extension to=
 the framework.<br></div><div>=C2=A0</div><blockquote class=3D"gmail_quote"=
 style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);p=
adding-left:1ex">
<br>
3.) What is the relationship to the Token Binding Work at OAuth (<a href=3D=
"https://datatracker.ietf.org/doc/draft-ietf-oauth-token-binding/" rel=3D"n=
oreferrer" target=3D"_blank">https://datatracker.ietf.org/<wbr>doc/draft-ie=
tf-oauth-token-bin<wbr>ding/</a>) ?<br>
<br>
3-bis.) To me it seems like this could go into a profile of the ACE framewo=
rk. Would someone be willing to write such a draft?<br></blockquote><div><b=
r></div><div>Agree</div><div> <br></div><blockquote class=3D"gmail_quote" s=
tyle=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);pad=
ding-left:1ex">
<br>
<br>
4.) What parameters to put into the response to an unauthorized request (<a=
 href=3D"https://tools.ietf.org/html/draft-ietf-ace-oauth-authz-08#section-=
5.1.2" rel=3D"noreferrer" target=3D"_blank">https://tools.ietf.org/html/d<w=
br>raft-ietf-ace-oauth-authz-08#s<wbr>ection-5.1.2</a>)?<br>
<br>
Jim Schaad suggested to add information about the audience and scope the RS=
 expects to grant access to the given resource<br>
(<a href=3D"https://mailarchive.ietf.org/arch/msg/ace/iObf0ECho--7FCYWBRQYU=
HtOsBw" rel=3D"noreferrer" target=3D"_blank">https://mailarchive.ietf.org/<=
wbr>arch/msg/ace/iObf0ECho--7FCYWB<wbr>RQYUHtOsBw</a>)<br></blockquote><div=
><br></div><div><br></div><div>I liked Carstens comment=C2=A0 &quot;It shou=
ld be up to the deployment what it wants to reveal here. So do provide a wa=
y to include this information, but do not require it.&quot; <br></div><div>=
So +1 on that.</div><div><br></div><blockquote class=3D"gmail_quote" style=
=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding=
-left:1ex">
<br>
We have had some discussion on this topic already, but I have not seen a co=
nclusive &quot;decision&quot; by the group (if such a thing can exist) as t=
o what to do.<br>
<br>
5.) Francesca suggested to allow the AS to return a list of possible profil=
es to the client in response to an access token request. Currently only one=
 profile is selected and optionally returned by the AS (it could even be im=
plicit and not be returned at all).<br>
<br>
Background: The way I was thinking this should work was that both the clien=
t and the RS need to be registered at the AS in order for the exchanges to =
work. I made the assumption (<a href=3D"https://tools.ietf.org/html/draft-i=
etf-ace-oauth-authz-08#appendix-D" rel=3D"noreferrer" target=3D"_blank">htt=
ps://tools.ietf.org/html/d<wbr>raft-ietf-ace-oauth-authz-08#a<wbr>ppendix-D=
</a>) that the AS would already know which profiles both C and RS support, =
and thus just select the ideal one.<br>
<br>
What does the group think, should we instead allow for a list of profiles a=
nd let the client select which one to use?<br></blockquote><div><br></div><=
div>I think AS should return one profile, I would like to avoid negotiation=
, for now at least.<br></div><div>=C2=A0</div><blockquote class=3D"gmail_qu=
ote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,20=
4);padding-left:1ex">
<br>
<br>
Regards,<br>
<br>
Ludwig<span class=3D"gmail-HOEnZb"><font color=3D"#888888"><br>
<br>
-- <br>
Ludwig Seitz, PhD<br>
Security Lab, RISE SICS<br>
Phone <a href=3D"tel:%2B46%280%2970-349%2092%2051" value=3D"+46703499251" t=
arget=3D"_blank">+46(0)70-349 92 51</a><br>
<br>
______________________________<wbr>_________________<br>
Ace mailing list<br>
<a href=3D"mailto:Ace@ietf.org" target=3D"_blank">Ace@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/ace" rel=3D"noreferrer" ta=
rget=3D"_blank">https://www.ietf.org/mailman/l<wbr>istinfo/ace</a><br>
</font></span></blockquote></div><br></div></div>

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From: Sandeep Kumar <sandeep.kumar@philips.com>
To: Michael Richardson <mcr+ietf@sandelman.ca>, Sandeep Kumar <sandeep.kumar@philips.com>, "ace@ietf.org" <ace@ietf.org>
CC: "consultancy@vanderstok.org" <consultancy@vanderstok.org>
Thread-Topic: [Ace] DTLS proxy in EST-coaps
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Date: Mon, 20 Nov 2017 07:48:57 +0000
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Archived-At: <https://mailarchive.ietf.org/arch/msg/ace/a837naagnU4N13veyjzKy1uwZ9g>
Subject: Re: [Ace] DTLS proxy in EST-coaps
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Thread uses DTLS relay as a building block for bootstrapping. The DRY was s=
olved with Thread specific messaging. You can find some details in their pu=
blic whitepapers.

-----Original Message-----
From: Michael Richardson [mailto:mcr+ietf@sandelman.ca]
Sent: Friday, November 17, 2017 3:12 PM
To: Sandeep Kumar <sandeep.kumar@philips.com>; ace@ietf.org
Cc: consultancy@vanderstok.org
Subject: Re: [Ace] DTLS proxy in EST-coaps


Sandeep Kumar <sandeep.kumar@philips.com> wrote:
    > DTLS relaying draft was in DICE wg. The WG was not chartered for the
    > activity. Other SDOs picked it up and filed the gaps.

    mcr> For DTLS, I thought we had a few IDs on how to relay DTLS in a
    mcr> stateless manner.  I can't seem to find any (Yes, I did look throu=
gh
    mcr> expired drafts
    mcr> too).

I was reminded in a private email that the document I wanted was yours:
  https://tools.ietf.org/html/draft-kumar-dice-dtls-relay-02

but it does not detail what the DRY header would look like.

I assume it has to fit into DTLS clothing so that it can be demux'ed.
I was hoping that your document had already figured that part out.
Perhaps you have some thinking you can share?

Which SDOs picked up the gap, and where are the documents?
Were there IANA allocations required?

--
Michael Richardson <mcr+IETF@sandelman.ca>, Sandelman Software Works  -=3D =
IPv6 IoT consulting =3D-




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From nobody Mon Nov 20 08:15:47 2017
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From: IETF Secretariat <ietf-ipr@ietf.org>
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Subject: [Ace] IPR Disclosure Telefonaktiebolaget LM Ericsson (publ)'s Statement about IPR related to draft-ietf-ace-dtls-authorize
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Dear Stefanie Gerdes, Olaf Bergmann, Carsten Bormann, Göran Selander, Ludwig Seitz:


An IPR disclosure that pertains to your Internet-Draft entitled
"Datagram Transport Layer Security (DTLS) Profiles for Authentication
and Authorization for Constrained Environments (ACE)"
(draft-ietf-ace-dtls-authorize) was submitted to the IETF Secretariat on  and
has been posted on the "IETF Page of Intellectual Property Rights
Disclosures" (https://datatracker.ietf.org/ipr/3112/). The title of the IPR
disclosure is "Telefonaktiebolaget LM Ericsson (publ)'s Statement about
IPR related to draft-ietf-ace-dtls-authorize"


Thank you

IETF Secretariat


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Subject: [Ace] Application Layer TLS
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Hi all,

based on the recent email discussion about the DTLS proxy I thought it migh=
t be useful that there was some thinking about how to run TLS/DTLS at the a=
pplication layer.
There are essentially two drafts that have been submitted at the same time =
for IETF#100, namely

https://tools.ietf.org/html/draft-tschofenig-layered-tls-00
https://tools.ietf.org/html/draft-friel-tls-over-http-00

Both teams have worked on prototypes and getting it to work was remarkably =
simple.

Maybe something for this group to look at.

Ciao
Hannes

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<body lang=3D"EN-GB" link=3D"blue" vlink=3D"purple">
<div class=3D"WordSection1">
<p class=3D"MsoNormal">Hi all, <o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">based on the recent email discussion about the DTLS =
proxy I thought it might be useful that there was some thinking about how t=
o run TLS/DTLS at the application layer.
<o:p></o:p></p>
<p class=3D"MsoNormal">There are essentially two drafts that have been subm=
itted at the same time for IETF#100, namely<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><a href=3D"https://tools.ietf.org/html/draft-tschofe=
nig-layered-tls-00">https://tools.ietf.org/html/draft-tschofenig-layered-tl=
s-00</a><o:p></o:p></p>
<p class=3D"MsoNormal"><a href=3D"https://tools.ietf.org/html/draft-friel-t=
ls-over-http-00">https://tools.ietf.org/html/draft-friel-tls-over-http-00</=
a><o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Both teams have worked on prototypes and getting it =
to work was remarkably simple.
<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Maybe something for this group to look at. <o:p></o:=
p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Ciao<br>
Hannes<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
</div>
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--_000_AM4PR0801MB2706EA595581E0E6CAE3ED40FA230AM4PR0801MB2706_--


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On 2017-11-21 10:42, Hannes Tschofenig wrote:
> Hi all,
> 
> based on the recent email discussion about the DTLS proxy I thought it 
> might be useful that there was some thinking about how to run TLS/DTLS 
> at the application layer.
> 
> There are essentially two drafts that have been submitted at the same 
> time for IETF#100, namely
> 
> https://tools.ietf.org/html/draft-tschofenig-layered-tls-00
> 
> https://tools.ietf.org/html/draft-friel-tls-over-http-00
> 
> Both teams have worked on prototypes and getting it to work was 
> remarkably simple.
> 
> Maybe something for this group to look at.
> 
> Ciao
> Hannes


I have a vague memory of a DICE draft for doing the DTLS handshake over 
CoAP a long time ago:

https://datatracker.ietf.org/doc/html/draft-schmertmann-dice-codtls-00

Can the original authors tell us why they didn't go further with that 
approach?

/Ludwig


-- 
Ludwig Seitz, PhD
Security Lab, RISE SICS
Phone +46(0)70-349 92 51


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From: Samuel Erdtman <samuel@erdtman.se>
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--001a114a8d4a9dcf0e055e7b881d
Content-Type: text/plain; charset="UTF-8"

Hi,

I have submitted draft-erdtman-oauth-rpcc under the OAuth WG as discussed
during IETF 100. (Moved from ACE WG since the new credentials does not have
any formal connection to the ACE documents, i.e. pure OAuth stuff)

This document defines how to user Raw-Public-Key and Pre-Shared-Key with
(D)TLS as client credentials.

We think it is essential to define this for IoT devices since the classic
client id and secret is not very suitable for devices with limited user
interfaces.

Comments, questions and reviews would be very appreciated.

Cheers
//Samuel

---------- Forwarded message ---------
From: <internet-drafts@ietf.org>
Date: Tue, 21 Nov 2017 at 11:09
Subject: New Version Notification for draft-erdtman-oauth-rpcc-00.txt
To: Marco Tiloca <marco.tiloca@ri.se>, Ludwig Seitz <ludwig.seitz@ri.se>,
Samuel Erdtman <erdtman@spotify.com>



A new version of I-D, draft-erdtman-oauth-rpcc-00.txt
has been successfully submitted by Samuel Erdtman and posted to the
IETF repository.

Name:           draft-erdtman-oauth-rpcc
Revision:       00
Title:          Raw-Public-Key and Pre-Shared-Key as OAuth client
credentials
Document date:  2017-11-20
Group:          Individual Submission
Pages:          6
URL:            https://www.ietf.org/internet-drafts/draft-erdtman-oauth-
rpcc-00.txt
Status:         https://datatracker.ietf.org/doc/draft-erdtman-oauth-rpcc/
Htmlized:       https://tools.ietf.org/html/draft-erdtman-oauth-rpcc-00
Htmlized:       https://datatracker.ietf.org/doc/html/draft-erdtman-oauth-
rpcc-00


Abstract:
   This document describes Transport Layer Security (TLS) authentication
   using Raw-Public-Key and Pre-Shared-Key as new mechanisms for OAuth
   client authentication.  Although defined for TLS the mechanisms are
   equally applicable for DTLS.




Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org.

The IETF Secretariat

--001a114a8d4a9dcf0e055e7b881d
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div class=3D"gmail_quote">Hi,</div><div class=3D"gmail_qu=
ote"><br></div><div class=3D"gmail_quote">I have submitted draft-erdtman-oa=
uth-rpcc under the OAuth WG as discussed during IETF 100. (Moved from ACE W=
G since the new credentials does not have any formal connection to the ACE =
documents, i.e. pure OAuth stuff)<br></div><div class=3D"gmail_quote"><br><=
/div><div class=3D"gmail_quote">This document defines how to user Raw-Publi=
c-Key and Pre-Shared-Key with (D)TLS as client credentials.</div><div class=
=3D"gmail_quote"><br></div><div class=3D"gmail_quote">We think it is essent=
ial to define this for IoT devices since the classic client id and secret i=
s not very suitable for devices with limited user interfaces.</div><div cla=
ss=3D"gmail_quote"><br></div><div class=3D"gmail_quote">Comments, questions=
 and reviews would be very appreciated.</div><div class=3D"gmail_quote"><br=
></div><div class=3D"gmail_quote">Cheers</div><div class=3D"gmail_quote">//=
Samuel<br></div><div class=3D"gmail_quote"><div><br><div class=3D"gmail_quo=
te"><div>---------- Forwarded message ---------<br>From:  &lt;<a href=3D"ma=
ilto:internet-drafts@ietf.org" target=3D"_blank">internet-drafts@ietf.org</=
a>&gt;<br>Date: Tue, 21 Nov 2017 at 11:09<br>Subject: New Version Notificat=
ion for draft-erdtman-oauth-rpcc-00.<wbr>txt<br>To: Marco Tiloca &lt;<a hre=
f=3D"mailto:marco.tiloca@ri.se" target=3D"_blank">marco.tiloca@ri.se</a>&gt=
;, Ludwig Seitz &lt;<a href=3D"mailto:ludwig.seitz@ri.se" target=3D"_blank"=
>ludwig.seitz@ri.se</a>&gt;, Samuel Erdtman &lt;<a href=3D"mailto:erdtman@s=
potify.com" target=3D"_blank">erdtman@spotify.com</a>&gt;<br></div><br><br>=
<br>
A new version of I-D, draft-erdtman-oauth-rpcc-00.<wbr>txt<br>
has been successfully submitted by Samuel Erdtman and posted to the<br>
IETF repository.<br>
<br>
Name:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0draft-erdtman-oauth-rpcc<br>
Revision:=C2=A0 =C2=A0 =C2=A0 =C2=A000<br>
Title:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 Raw-Public-Key and Pre-Shared-Key =
as OAuth client credentials<br>
Document date:=C2=A0 2017-11-20<br>
Group:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 Individual Submission<br>
Pages:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 6<br>
URL:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 <a href=3D"https://www.ietf.o=
rg/internet-drafts/draft-erdtman-oauth-rpcc-00.txt" rel=3D"noreferrer" targ=
et=3D"_blank">https://www.ietf.org/internet-<wbr>drafts/draft-erdtman-oauth=
-<wbr>rpcc-00.txt</a><br>
Status:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0<a href=3D"https://datatracker.iet=
f.org/doc/draft-erdtman-oauth-rpcc/" rel=3D"noreferrer" target=3D"_blank">h=
ttps://datatracker.ietf.org/<wbr>doc/draft-erdtman-oauth-rpcc/</a><br>
Htmlized:=C2=A0 =C2=A0 =C2=A0 =C2=A0<a href=3D"https://tools.ietf.org/html/=
draft-erdtman-oauth-rpcc-00" rel=3D"noreferrer" target=3D"_blank">https://t=
ools.ietf.org/html/<wbr>draft-erdtman-oauth-rpcc-00</a><br>
Htmlized:=C2=A0 =C2=A0 =C2=A0 =C2=A0<a href=3D"https://datatracker.ietf.org=
/doc/html/draft-erdtman-oauth-rpcc-00" rel=3D"noreferrer" target=3D"_blank"=
>https://datatracker.ietf.org/<wbr>doc/html/draft-erdtman-oauth-<wbr>rpcc-0=
0</a><br>
<br>
<br>
Abstract:<br>
=C2=A0 =C2=A0This document describes Transport Layer Security (TLS) authent=
ication<br>
=C2=A0 =C2=A0using Raw-Public-Key and Pre-Shared-Key as new mechanisms for =
OAuth<br>
=C2=A0 =C2=A0client authentication.=C2=A0 Although defined for TLS the mech=
anisms are<br>
=C2=A0 =C2=A0equally applicable for DTLS.<br>
<br>
<br>
<br>
<br>
Please note that it may take a couple of minutes from the time of submissio=
n<br>
until the htmlized version and diff are available at <a href=3D"http://tool=
s.ietf.org" rel=3D"noreferrer" target=3D"_blank">tools.ietf.org</a>.<br>
<br>
The IETF Secretariat<br>
<br>
</div></div>
</div><br></div>

--001a114a8d4a9dcf0e055e7b881d--


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From: Abhijan Bhattacharyya <abhijan.bhattacharyya@tcs.com>
To: Ludwig Seitz <ludwig.seitz@ri.se>
Cc: <ace@ietf.org>
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Subject: Re: [Ace] Application Layer TLS
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Just to keep it on record:
We also had a draft which may find some relevance in the present context:
https://tools.ietf.org/html/draft-bhattacharyya-dice-less-on-coap-00
Related publication: http://ieeexplore.ieee.org/document/7096256/

With Best Regards
Abhijan Bhattacharyya
Associate Consultant
Scientist, TCS Research
Tata Consultancy Services
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-----"Ace" <ace-bounces@ietf.org> wrote: -----
To: <ace@ietf.org>
From: Ludwig Seitz
Sent by: "Ace"
Date: 11/21/2017 03:37PM
Subject: Re: [Ace] Application Layer TLS

On 2017-11-21 10:42, Hannes Tschofenig wrote:
> Hi all,
>
> based on the recent email discussion about the DTLS proxy I thought it
> might be useful that there was some thinking about how to run TLS/DTLS
> at the application layer.
>
> There are essentially two drafts that have been submitted at the same
> time for IETF#100, namely
>
> https://tools.ietf.org/html/draft-tschofenig-layered-tls-00
>
> https://tools.ietf.org/html/draft-friel-tls-over-http-00
>
> Both teams have worked on prototypes and getting it to work was
> remarkably simple.
>
> Maybe something for this group to look at.
>
> Ciao
> Hannes


I have a vague memory of a DICE draft for doing the DTLS handshake over
CoAP a long time ago:

https://datatracker.ietf.org/doc/html/draft-schmertmann-dice-codtls-00

Can the original authors tell us why they didn't go further with that
approach?

/Ludwig


--
Ludwig Seitz, PhD
Security Lab, RISE SICS
Phone +46(0)70-349 92 51

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From: Hannes Tschofenig <Hannes.Tschofenig@arm.com>
To: Abhijan Bhattacharyya <abhijan.bhattacharyya@tcs.com>, Ludwig Seitz <ludwig.seitz@ri.se>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/ace/8Aed_547pOgImydREBmj98jXO_0>
Subject: Re: [Ace] Application Layer TLS
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Thanks for the pointer. I wasn't aware of that work.

-----Original Message-----
From: Ace [mailto:ace-bounces@ietf.org] On Behalf Of Abhijan Bhattacharyya
Sent: 21 November 2017 11:24
To: Ludwig Seitz
Cc: ace@ietf.org
Subject: Re: [Ace] Application Layer TLS


Just to keep it on record:
We also had a draft which may find some relevance in the present context:
https://tools.ietf.org/html/draft-bhattacharyya-dice-less-on-coap-00
Related publication: http://ieeexplore.ieee.org/document/7096256/

With Best Regards
Abhijan Bhattacharyya
Associate Consultant
Scientist, TCS Research
Tata Consultancy Services
Building 1B,Ecospace
Plot -  IIF/12 ,New Town, Rajarhat,
Kolkata - 700160,West Bengal
India
Ph:- 033 66884691
Cell:- +919830468972
Mailto: abhijan.bhattacharyya@tcs.com
Website: http://www.tcs.com
____________________________________________
Experience certainty.IT Services
Business Solutions
Consulting
____________________________________________


-----"Ace" <ace-bounces@ietf.org> wrote: -----
To: <ace@ietf.org>
From: Ludwig Seitz
Sent by: "Ace"
Date: 11/21/2017 03:37PM
Subject: Re: [Ace] Application Layer TLS

On 2017-11-21 10:42, Hannes Tschofenig wrote:
> Hi all,
>
> based on the recent email discussion about the DTLS proxy I thought it
> might be useful that there was some thinking about how to run TLS/DTLS
> at the application layer.
>
> There are essentially two drafts that have been submitted at the same
> time for IETF#100, namely
>
> https://tools.ietf.org/html/draft-tschofenig-layered-tls-00
>
> https://tools.ietf.org/html/draft-friel-tls-over-http-00
>
> Both teams have worked on prototypes and getting it to work was
> remarkably simple.
>
> Maybe something for this group to look at.
>
> Ciao
> Hannes


I have a vague memory of a DICE draft for doing the DTLS handshake over CoA=
P a long time ago:

https://datatracker.ietf.org/doc/html/draft-schmertmann-dice-codtls-00

Can the original authors tell us why they didn't go further with that appro=
ach?

/Ludwig


--
Ludwig Seitz, PhD
Security Lab, RISE SICS
Phone +46(0)70-349 92 51

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From: Hannes Tschofenig <Hannes.Tschofenig@arm.com>
To: Ludwig Seitz <ludwig.seitz@ri.se>, "ace@ietf.org" <ace@ietf.org>
Thread-Topic: [Ace] Application Layer TLS
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Archived-At: <https://mailarchive.ietf.org/arch/msg/ace/ZyprNcTMYOnJSZd31i9nHf11-6E>
Subject: Re: [Ace] Application Layer TLS
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Hi Ludwig,

Carsten pointed me to that document. Mark and I will do a comparison betwee=
n the different solutions. In any case, it is great to see the level of int=
erest in this and if you attended the TLS WG session then you can certainly=
 appreciate the heated discussion.

One question I was asked at the IETF meeting was why the HTTP Connect funct=
ionality hasn't been defined in CoAP since this would make certain use case=
s with proxy use simpler.
For me that's a useful addition but does not cover the entire solution spac=
e since I am also consider non-IP based scenarios.

Ciao
Hannes

-----Original Message-----
From: Ace [mailto:ace-bounces@ietf.org] On Behalf Of Ludwig Seitz
Sent: 21 November 2017 11:07
To: ace@ietf.org
Subject: Re: [Ace] Application Layer TLS

On 2017-11-21 10:42, Hannes Tschofenig wrote:
> Hi all,
>
> based on the recent email discussion about the DTLS proxy I thought it
> might be useful that there was some thinking about how to run TLS/DTLS
> at the application layer.
>
> There are essentially two drafts that have been submitted at the same
> time for IETF#100, namely
>
> https://tools.ietf.org/html/draft-tschofenig-layered-tls-00
>
> https://tools.ietf.org/html/draft-friel-tls-over-http-00
>
> Both teams have worked on prototypes and getting it to work was
> remarkably simple.
>
> Maybe something for this group to look at.
>
> Ciao
> Hannes


I have a vague memory of a DICE draft for doing the DTLS handshake over CoA=
P a long time ago:

https://datatracker.ietf.org/doc/html/draft-schmertmann-dice-codtls-00

Can the original authors tell us why they didn't go further with that appro=
ach?

/Ludwig


--
Ludwig Seitz, PhD
Security Lab, RISE SICS
Phone +46(0)70-349 92 51

_______________________________________________
Ace mailing list
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IMPORTANT NOTICE: The contents of this email and any attachments are confid=
ential and may also be privileged. If you are not the intended recipient, p=
lease notify the sender immediately and do not disclose the contents to any=
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any medium. Thank you.


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Dear all:

This I-D we wrote sometime ago might be also related:

=
https://tools.ietf.org/html/draft-garcia-core-app-layer-sec-with-dtls-reco=
rd-00 =
<https://tools.ietf.org/html/draft-garcia-core-app-layer-sec-with-dtls-rec=
ord-00>

Best Regards.

> El 21 nov 2017, a las 11:54, Hannes Tschofenig =
<hannes.tschofenig@arm.com> escribi=C3=B3:
>=20
> Hi Ludwig,
>=20
> Carsten pointed me to that document. Mark and I will do a comparison =
between the different solutions. In any case, it is great to see the =
level of interest in this and if you attended the TLS WG session then =
you can certainly appreciate the heated discussion.
>=20
> One question I was asked at the IETF meeting was why the HTTP Connect =
functionality hasn't been defined in CoAP since this would make certain =
use cases with proxy use simpler.
> For me that's a useful addition but does not cover the entire solution =
space since I am also consider non-IP based scenarios.
>=20
> Ciao
> Hannes
>=20
> -----Original Message-----
> From: Ace [mailto:ace-bounces@ietf.org] On Behalf Of Ludwig Seitz
> Sent: 21 November 2017 11:07
> To: ace@ietf.org
> Subject: Re: [Ace] Application Layer TLS
>=20
> On 2017-11-21 10:42, Hannes Tschofenig wrote:
>> Hi all,
>>=20
>> based on the recent email discussion about the DTLS proxy I thought =
it
>> might be useful that there was some thinking about how to run =
TLS/DTLS
>> at the application layer.
>>=20
>> There are essentially two drafts that have been submitted at the same
>> time for IETF#100, namely
>>=20
>> https://tools.ietf.org/html/draft-tschofenig-layered-tls-00
>>=20
>> https://tools.ietf.org/html/draft-friel-tls-over-http-00
>>=20
>> Both teams have worked on prototypes and getting it to work was
>> remarkably simple.
>>=20
>> Maybe something for this group to look at.
>>=20
>> Ciao
>> Hannes
>=20
>=20
> I have a vague memory of a DICE draft for doing the DTLS handshake =
over CoAP a long time ago:
>=20
> https://datatracker.ietf.org/doc/html/draft-schmertmann-dice-codtls-00
>=20
> Can the original authors tell us why they didn't go further with that =
approach?
>=20
> /Ludwig
>=20
>=20
> --
> Ludwig Seitz, PhD
> Security Lab, RISE SICS
> Phone +46(0)70-349 92 51
>=20
> _______________________________________________
> Ace mailing list
> Ace@ietf.org
> https://www.ietf.org/mailman/listinfo/ace
> IMPORTANT NOTICE: The contents of this email and any attachments are =
confidential and may also be privileged. If you are not the intended =
recipient, please notify the sender immediately and do not disclose the =
contents to any other person, use it for any purpose, or store or copy =
the information in any medium. Thank you.
>=20
> _______________________________________________
> Ace mailing list
> Ace@ietf.org
> https://www.ietf.org/mailman/listinfo/ace

-------------------------------------------------------
Rafa Marin-Lopez, PhD
Dept. Information and Communications Engineering (DIIC)
Faculty of Computer Science-University of Murcia
30100 Murcia - Spain
Telf: +34868888501 Fax: +34868884151 e-mail: rafa@um.es
-------------------------------------------------------





--Apple-Mail=_7CC1C820-4259-461E-A612-9C1ABC43A9AC
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	charset=utf-8

<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html =
charset=3Dutf-8"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" =
class=3D"">Dear all:<div class=3D""><br class=3D""></div><div =
class=3D"">This I-D we wrote sometime ago might be also =
related:</div><div class=3D""><br class=3D""></div><div class=3D""><a =
href=3D"https://tools.ietf.org/html/draft-garcia-core-app-layer-sec-with-d=
tls-record-00" =
class=3D"">https://tools.ietf.org/html/draft-garcia-core-app-layer-sec-wit=
h-dtls-record-00</a></div><div class=3D""><br class=3D""></div><div =
class=3D"">Best Regards.</div><div class=3D""><br =
class=3D""><div><blockquote type=3D"cite" class=3D""><div class=3D"">El =
21 nov 2017, a las 11:54, Hannes Tschofenig &lt;<a =
href=3D"mailto:hannes.tschofenig@arm.com" =
class=3D"">hannes.tschofenig@arm.com</a>&gt; escribi=C3=B3:</div><br =
class=3D"Apple-interchange-newline"><div class=3D""><div class=3D"">Hi =
Ludwig,<br class=3D""><br class=3D"">Carsten pointed me to that =
document. Mark and I will do a comparison between the different =
solutions. In any case, it is great to see the level of interest in this =
and if you attended the TLS WG session then you can certainly appreciate =
the heated discussion.<br class=3D""><br class=3D"">One question I was =
asked at the IETF meeting was why the HTTP Connect functionality hasn't =
been defined in CoAP since this would make certain use cases with proxy =
use simpler.<br class=3D"">For me that's a useful addition but does not =
cover the entire solution space since I am also consider non-IP based =
scenarios.<br class=3D""><br class=3D"">Ciao<br class=3D"">Hannes<br =
class=3D""><br class=3D"">-----Original Message-----<br class=3D"">From: =
Ace [<a href=3D"mailto:ace-bounces@ietf.org" =
class=3D"">mailto:ace-bounces@ietf.org</a>] On Behalf Of Ludwig Seitz<br =
class=3D"">Sent: 21 November 2017 11:07<br class=3D"">To: <a =
href=3D"mailto:ace@ietf.org" class=3D"">ace@ietf.org</a><br =
class=3D"">Subject: Re: [Ace] Application Layer TLS<br class=3D""><br =
class=3D"">On 2017-11-21 10:42, Hannes Tschofenig wrote:<br =
class=3D""><blockquote type=3D"cite" class=3D"">Hi all,<br class=3D""><br =
class=3D"">based on the recent email discussion about the DTLS proxy I =
thought it<br class=3D"">might be useful that there was some thinking =
about how to run TLS/DTLS<br class=3D"">at the application layer.<br =
class=3D""><br class=3D"">There are essentially two drafts that have =
been submitted at the same<br class=3D"">time for IETF#100, namely<br =
class=3D""><br class=3D""><a =
href=3D"https://tools.ietf.org/html/draft-tschofenig-layered-tls-00" =
class=3D"">https://tools.ietf.org/html/draft-tschofenig-layered-tls-00</a>=
<br class=3D""><br =
class=3D"">https://tools.ietf.org/html/draft-friel-tls-over-http-00<br =
class=3D""><br class=3D"">Both teams have worked on prototypes and =
getting it to work was<br class=3D"">remarkably simple.<br class=3D""><br =
class=3D"">Maybe something for this group to look at.<br class=3D""><br =
class=3D"">Ciao<br class=3D"">Hannes<br class=3D""></blockquote><br =
class=3D""><br class=3D"">I have a vague memory of a DICE draft for =
doing the DTLS handshake over CoAP a long time ago:<br class=3D""><br =
class=3D""><a =
href=3D"https://datatracker.ietf.org/doc/html/draft-schmertmann-dice-codtl=
s-00" =
class=3D"">https://datatracker.ietf.org/doc/html/draft-schmertmann-dice-co=
dtls-00</a><br class=3D""><br class=3D"">Can the original authors tell =
us why they didn't go further with that approach?<br class=3D""><br =
class=3D"">/Ludwig<br class=3D""><br class=3D""><br class=3D"">--<br =
class=3D"">Ludwig Seitz, PhD<br class=3D"">Security Lab, RISE SICS<br =
class=3D"">Phone +46(0)70-349 92 51<br class=3D""><br =
class=3D"">_______________________________________________<br =
class=3D"">Ace mailing list<br class=3D"">Ace@ietf.org<br =
class=3D"">https://www.ietf.org/mailman/listinfo/ace<br =
class=3D"">IMPORTANT NOTICE: The contents of this email and any =
attachments are confidential and may also be privileged. If you are not =
the intended recipient, please notify the sender immediately and do not =
disclose the contents to any other person, use it for any purpose, or =
store or copy the information in any medium. Thank you.<br class=3D""><br =
class=3D"">_______________________________________________<br =
class=3D"">Ace mailing list<br class=3D"">Ace@ietf.org<br =
class=3D"">https://www.ietf.org/mailman/listinfo/ace<br =
class=3D""></div></div></blockquote></div><br class=3D""><div class=3D"">
<div style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; =
-webkit-line-break: after-white-space;" class=3D""><div style=3D"color: =
rgb(0, 0, 0); font-family: Courier; font-size: 16px; font-style: normal; =
font-variant-caps: normal; font-weight: normal; letter-spacing: normal; =
orphans: auto; text-align: start; text-indent: 0px; text-transform: =
none; white-space: normal; widows: auto; word-spacing: 0px; =
-webkit-text-stroke-width: =
0px;">-------------------------------------------------------<br =
class=3D"">Rafa Marin-Lopez, PhD<br class=3D"">Dept. Information =
and&nbsp;Communications&nbsp;Engineering (DIIC)<br class=3D"">Faculty of =
Computer&nbsp;Science-University of&nbsp;Murcia<br class=3D"">30100 =
Murcia - Spain<br class=3D"">Telf: +34868888501 Fax:&nbsp;+34868884151 =
e-mail:&nbsp;<a href=3D"mailto:rafa@um.es" class=3D"">rafa@um.es</a><br =
class=3D"">-------------------------------------------------------</div><d=
iv style=3D"color: rgb(0, 0, 0); font-family: Courier; font-size: 16px; =
font-style: normal; font-variant-caps: normal; font-weight: normal; =
letter-spacing: normal; orphans: auto; text-align: start; text-indent: =
0px; text-transform: none; white-space: normal; widows: auto; =
word-spacing: 0px; -webkit-text-stroke-width: 0px;" class=3D""><br =
class=3D""></div><br class=3D"Apple-interchange-newline"></div><br =
class=3D"Apple-interchange-newline">
</div>
<br class=3D""></div></body></html>=

--Apple-Mail=_7CC1C820-4259-461E-A612-9C1ABC43A9AC--


From nobody Tue Nov 21 03:42:59 2017
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From: Olaf Bergmann <bergmann@tzi.org>
To: Ludwig Seitz <ludwig.seitz@ri.se>
Cc: <ace@ietf.org>
References: <AM4PR0801MB2706EA595581E0E6CAE3ED40FA230@AM4PR0801MB2706.eurprd08.prod.outlook.com> <6709ef3c-23e4-8a6f-0b37-34cb842b0f5a@ri.se>
Date: Tue, 21 Nov 2017 12:42:52 +0100
In-Reply-To: <6709ef3c-23e4-8a6f-0b37-34cb842b0f5a@ri.se> (Ludwig Seitz's message of "Tue, 21 Nov 2017 11:06:53 +0100")
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Subject: Re: [Ace] Application Layer TLS
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Ludwig Seitz <ludwig.seitz@ri.se> writes:

> I have a vague memory of a DICE draft for doing the DTLS handshake
> over CoAP a long time ago:
>
> https://datatracker.ietf.org/doc/html/draft-schmertmann-dice-codtls-00
>
> Can the original authors tell us why they didn't go further with that
> approach?

The main reason was that it did not fit into the official DICE work
program. Meanwhile, the student who did most of the work (including a
working prototype[1] which is also available as rubby gem) has graduated
and left the university.

But there is no technical reason for not taking this up again.

[1] https://github.com/SmallLars/codtls

Gr=C3=BC=C3=9Fe
Olaf


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From: Hannes Tschofenig <Hannes.Tschofenig@arm.com>
To: Olaf Bergmann <bergmann@tzi.org>, Ludwig Seitz <ludwig.seitz@ri.se>
CC: "ace@ietf.org" <ace@ietf.org>
Thread-Topic: [Ace] Application Layer TLS
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Subject: Re: [Ace] Application Layer TLS
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Hannes Tschofenig <Hannes.Tschofenig@arm.com> writes:

> To me it sounds like we have multiple groups who have seen a problem
> and have been willing to spend the time to work on the solutions.
>
> I believe we should put a BOF proposal for the London IETF meeting
> together. How does that sound?

+1

Gr=C3=BC=C3=9Fe
Olaf


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From: Carsten Bormann <cabo@tzi.org>
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Subject: Re: [Ace] Application Layer TLS
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On Nov 21, 2017, at 12:42, Olaf Bergmann <bergmann@tzi.org> wrote:
>=20
> Ludwig Seitz <ludwig.seitz@ri.se> writes:
>=20
>> I have a vague memory of a DICE draft for doing the DTLS handshake
>> over CoAP a long time ago:
>>=20
>> =
https://datatracker.ietf.org/doc/html/draft-schmertmann-dice-codtls-00
>>=20
>> Can the original authors tell us why they didn't go further with that
>> approach?
>=20
> The main reason was that it did not fit into the official DICE work
> program. Meanwhile, the student who did most of the work (including a
> working prototype[1] which is also available as rubby gem) has =
graduated
> and left the university.
>=20
> But there is no technical reason for not taking this up again.
>=20
> [1] https://github.com/SmallLars/codtls

This work was a successful early proof of concept and has thus fully =
achieved its objective.

One more reason that we haven=E2=80=99t picked this up again is that the =
original work was for an older chip, the MC1322x, and contained code to =
keep connection state in the Flash of that chip that probably would need =
some porting.

At the time, the TLS WG also didn=E2=80=99t seem particularly receptive =
to new work: codtls is not just a compressed DTLS, as it performed the =
MAC operations for the Finished messages on the actual messages =
exchanged, not on the original uncompressed messages that never are =
reified.  Essentially, a large part of the complexity of the solution is =
in trying to maintain the entire set of TLS exchanges, and then the MAC =
doesn=E2=80=99t quite.  (This is a fundamental problem any TLS emulation =
will have, and it would be good to get the envelope of what works and =
what doesn=E2=80=99t for this specified.)

With much more tailored solutions around the corner (e.g., EDHOC), we =
didn=E2=80=99t see a strong technical motivation to take this up again =
either.  But we sure can if there is a political reason instead.

Gr=C3=BC=C3=9Fe, Carsten


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--=-=-=
Content-Type: text/plain


Hannes Tschofenig <Hannes.Tschofenig@arm.com> wrote:
    > based on the recent email discussion about the DTLS proxy I thought it
    > might be useful that there was some thinking about how to run TLS/DTLS
    > at the application layer.

yes, and I'm enthusiastic to permit EST to run over whatever comes out, as I
suspect it will be bytes-on-the-wire cheaper than COAPS.

Yet, there are people who want EST over CoAPS to work as is...

--
Michael Richardson <mcr+IETF@sandelman.ca>, Sandelman Software Works
 -= IPv6 IoT consulting =-




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--=-=-=
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Hannes Tschofenig <Hannes.Tschofenig@arm.com> wrote:
    > One question I was asked at the IETF meeting was why the HTTP Connect
    > functionality hasn't been defined in CoAP since this would make certain
    > use cases with proxy use simpler.

HTTPS CONNECT invokes a multistage TLS connection: client->proxy and proxy->server.
That obscures the server certificate from the client and VV, and we have a
well established serious security issues in the "enterprise" world with the
ability of the proxy to usefully validate the server certificate.

An COAP (not COAPS) CONNECT mechanism which put the security inside CoAP
(as EDHOC/OSCORE and presumably draft-tschofenig-layered-tls-00 and
draft-friel-tls-over-http-00 do) solves the problem of certificate validation
nicely because it offers end to end security.

However, it's unclear to me how it would be better than NAT66 (with all of
it's expensive state), which is why I want a mechanism where the relay state
is stored in the network (echoed, source routed back to the proxy).

--
Michael Richardson <mcr+IETF@sandelman.ca>, Sandelman Software Works
 -= IPv6 IoT consulting =-




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Hannes,

Hannes Tschofenig <Hannes.Tschofenig@arm.com> writes:

> Hi all,
>
> based on the recent email discussion about the DTLS proxy I thought it might
> be useful that there was some thinking about how to run TLS/DTLS at the
> application layer.

I don't understand this statement.  The whole point of TLS/DTLS is that
it runs at the Application Layer (as opposed to at the network layer,
like IPsec).  Indeed, the fact that it could run at the application
layer (e.g. in a web brower / web server) is exactly why SSL/TLS was
created in the first place.  It meant you didn't require waiting for the
kernel/OS to add network security.

> There are essentially two drafts that have been submitted at the same time for
> IETF#100, namely
>
> https://tools.ietf.org/html/draft-tschofenig-layered-tls-00
>
> https://tools.ietf.org/html/draft-friel-tls-over-http-00

So you are moving the application layer up even higher than the historic
view of an application layer?

Perhaps we need a better naming scheme here.

> Both teams have worked on prototypes and getting it to work was remarkably
> simple.

-derek
-- 
       Derek Atkins                 617-623-3745
       derek@ihtfp.com             www.ihtfp.com
       Computer and Internet Security Consultant


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--=-=-=
Content-Type: text/plain


Derek Atkins <derek@ihtfp.com> wrote:
    >> based on the recent email discussion about the DTLS proxy I thought it might
    >> be useful that there was some thinking about how to run TLS/DTLS at the
    >> application layer.

    > I don't understand this statement.  The whole point of TLS/DTLS is that
    > it runs at the Application Layer (as opposed to at the network layer,

DTLS has to provide many of the services of the Transport and Network layer
(various amounts of reliability, fragmentation/segmentation) and there is
overhead in that.  When running over things like CoAP, which *ALSO* provides
those services, and in a more constrained network happy way, DTLS is way less
appealing.

    > Perhaps we need a better naming scheme here.

In my opinion, the ISO layer naming system has always been better as
documentation, rather than architecture :-)

--
Michael Richardson <mcr+IETF@sandelman.ca>, Sandelman Software Works
 -= IPv6 IoT consulting =-




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On Nov 21, 2017, at 19:48, Michael Richardson <mcr+ietf@sandelman.ca> =
wrote:
>=20
> In my opinion, the ISO layer naming system has always been better as
> documentation, rather than architecture :-)

And we can celebrate its 40th birthday in a couple of months.

Gr=C3=BC=C3=9Fe, Carsten


(The OSI Reference Model, standardized in ISO 7498/ITU-T X.200 was =
*intended* to be prescriptive, structuring the standardization work =
lying ahead in 1978.
It lost that function with the factual end of the OSI project a dozen =
years later, and most people have forgotten what the OSI layers were =
about:  Layer 2, 3, 4, 7 took on a new, slightly different meaning as =
layer numbers for the layers named in RFC 1122/1123, while 1 is =
convenient as a layer number for the part of the RFC 1122 link layer =
that is concerned with bits, symbols, clocks, and physical =
interoperability.
The old seven-layer OSI model is still being taught, usually mostly with =
the current meaning of the layer numbers that still exist, and a lot of =
misconceptions of what L5/L6 were supposed to be, in computer networking =
classes by teachers that don=E2=80=99t know better.  Foo.)


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From: Abhijan Bhattacharyya <abhijan.bhattacharyya@tcs.com>
To: Hannes Tschofenig <Hannes.Tschofenig@arm.com>
Cc: Olaf Bergmann <bergmann@tzi.org>, Ludwig Seitz <ludwig.seitz@ri.se>, "ace@ietf.org" <ace@ietf.org>
Message-ID: <OF4F11DFD7.17B195B2-ON652581DF.006EEC3C-652581DF.006EEC41@tcs.com>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/ace/6sS7eeTee2fbrHnWWvohNEgs7wQ>
Subject: Re: [Ace] Application Layer TLS
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+1

With Best Regards
 Abhijan Bhattacharyya
 Associate Consultant
 Scientist, TCS Research
 Tata Consultancy Services
 Building 1B,Ecospace
 Plot -  IIF/12 ,New Town, Rajarhat,
 Kolkata - 700160,West Bengal
 India
 Ph:- 033 66884691
 Cell:- +919830468972
 Mailto: abhijan.bhattacharyya@tcs.com
 Website: http://www.tcs.com
 ____________________________________________
 Experience certainty.	IT Services
 			Business Solutions
 			Consulting
 ____________________________________________
 =


-----"Ace" <ace-bounces@ietf.org> wrote: -----
To: Olaf Bergmann <bergmann@tzi.org>, Ludwig Seitz <ludwig.seitz@ri.se>
From: Hannes Tschofenig =

Sent by: "Ace" =

Date: 11/21/2017 05:56PM
Cc: "ace@ietf.org" <ace@ietf.org>
Subject: Re: [Ace] Application Layer TLS

To me it sounds like we have multiple groups who have seen a problem and ha=
ve been willing to spend the time to work on the solutions.

I believe we should put a BOF proposal for the London IETF meeting together=
. How does that sound?

Ciao
Hannes

-----Original Message-----
From: Ace [mailto:ace-bounces@ietf.org] On Behalf Of Olaf Bergmann
Sent: 21 November 2017 12:43
To: Ludwig Seitz
Cc: ace@ietf.org
Subject: Re: [Ace] Application Layer TLS

Ludwig Seitz <ludwig.seitz@ri.se> writes:

> I have a vague memory of a DICE draft for doing the DTLS handshake
> over CoAP a long time ago:
>
> https://datatracker.ietf.org/doc/html/draft-schmertmann-dice-codtls-00
>
> Can the original authors tell us why they didn't go further with that
> approach?

The main reason was that it did not fit into the official DICE work program=
. Meanwhile, the student who did most of the work (including a working prot=
otype[1] which is also available as rubby gem) has graduated and left the u=
niversity.

But there is no technical reason for not taking this up again.

[1] https://github.com/SmallLars/codtls

Gr=FC=DFe
Olaf

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<font face=3D"Default Sans Serif,Verdana,Arial,Helvetica,sans-serif" size=
=3D"2">+1<br><br><span><font size=3D"2">With Best Regards<br>
</font><font size=3D"2">Abhijan Bhattacharyya<br>
</font><font size=3D"2">Associate Consultant<br>
</font><font size=3D"2">Scientist, TCS Research<br>
</font><font size=3D"2">Tata Consultancy Services<br>
</font><font size=3D"2">Building 1B,Ecospace<br>
</font><font size=3D"2">Plot - &nbsp;IIF/12 ,New Town, Rajarhat,<br>
</font><font size=3D"2">Kolkata - 700160,West Bengal<br>
</font><font size=3D"2">India<br>
</font><font size=3D"2">Ph:- 033 66884691<br>
</font><font size=3D"2">Cell:- +919830468972<br>
</font><font size=3D"2">Mailto: <a href=3D"mailto:abhijan.bhattacharyya@tcs=
.com" target=3D"_blank">abhijan.bhattacharyya@tcs.com</a><br>
</font><font size=3D"2">Website: <a href=3D"http://www.tcs.com">http://www.=
tcs.com</a><br>
</font><font size=3D"2">____________________________________________<br>
</font><font size=3D"2">Experience certainty.	IT Services<br>
</font><font size=3D"2">			Business Solutions<br>
</font><font size=3D"2">			Consulting<br>
</font><font size=3D"2">____________________________________________<br>
</font></span><br><br><font color=3D"#990099">-----"Ace" &lt;<a href=3D"mai=
lto:ace-bounces@ietf.org" target=3D"_blank">ace-bounces@ietf.org</a>&gt; wr=
ote: -----</font><div class=3D"iNotesHistory" style=3D"padding-left:5px;"><=
div style=3D"padding-right:0px;padding-left:5px;border-left:solid black 2px=
;">To: Olaf Bergmann &lt;<a href=3D"mailto:bergmann@tzi.org" target=3D"_bla=
nk">bergmann@tzi.org</a>&gt;, Ludwig Seitz &lt;<a href=3D"mailto:ludwig.sei=
tz@ri.se" target=3D"_blank">ludwig.seitz@ri.se</a>&gt;<br>From: Hannes Tsch=
ofenig <hannes.tschofenig@arm.com><br>Sent by: "Ace" <ace-bounces@ietf.org>=
<br>Date: 11/21/2017 05:56PM<br>Cc: "<a href=3D"mailto:ace@ietf.org" target=
=3D"_blank">ace@ietf.org</a>" &lt;<a href=3D"mailto:ace@ietf.org" target=3D=
"_blank">ace@ietf.org</a>&gt;<br>Subject: Re: [Ace] Application Layer TLS<b=
r><br><div><font size=3D"2" face=3D"Courier New,Courier,monospace">To me it=
 sounds like we have multiple groups who have seen a problem and have been =
willing to spend the time to work on the solutions.<br><br>I believe we sho=
uld put a BOF proposal for the London IETF meeting together. How does that =
sound?<br><br>Ciao<br>Hannes<br><br>-----Original Message-----<br>From: Ace=
 [<a href=3D"mailto:ace-bounces@ietf.org">mailto:ace-bounces@ietf.org</a>] =
On Behalf Of Olaf Bergmann<br>Sent: 21 November 2017 12:43<br>To: Ludwig Se=
itz<br>Cc: <a href=3D"mailto:ace@ietf.org" target=3D"_blank">ace@ietf.org</=
a><br>Subject: Re: [Ace] Application Layer TLS<br><br>Ludwig Seitz &lt;<a h=
ref=3D"mailto:ludwig.seitz@ri.se" target=3D"_blank">ludwig.seitz@ri.se</a>&=
gt; writes:<br><br>&gt; I have a vague memory of a DICE draft for doing the=
 DTLS handshake<br>&gt; over CoAP a long time ago:<br>&gt;<br>&gt; <a href=
=3D"https://datatracker.ietf.org/doc/html/draft-schmertmann-dice-codtls-00"=
>https://datatracker.ietf.org/doc/html/draft-schmertmann-dice-codtls-00</a>=
<br>&gt;<br>&gt; Can the original authors tell us why they didn't go furthe=
r with that<br>&gt; approach?<br><br>The main reason was that it did not fi=
t into the official DICE work program. Meanwhile, the student who did most =
of the work (including a working prototype[1] which is also available as ru=
bby gem) has graduated and left the university.<br><br>But there is no tech=
nical reason for not taking this up again.<br><br>[1] <a href=3D"https://gi=
thub.com/SmallLars/codtls">https://github.com/SmallLars/codtls</a><br><br>G=
r=FC=DFe<br>Olaf<br><br>_______________________________________________<br>=
Ace mailing list<br><a href=3D"mailto:Ace@ietf.org" target=3D"_blank">Ace@i=
etf.org</a><br><a href=3D"https://www.ietf.org/mailman/listinfo/ace">https:=
//www.ietf.org/mailman/listinfo/ace</a><br>IMPORTANT NOTICE: The contents o=
f this email and any attachments are confidential and may also be privilege=
d. If you are not the intended recipient, please notify the sender immediat=
ely and do not disclose the contents to any other person, use it for any pu=
rpose, or store or copy the information in any medium. Thank you.<br>______=
_________________________________________<br>Ace mailing list<br><a href=3D=
"mailto:Ace@ietf.org" target=3D"_blank">Ace@ietf.org</a><br><a href=3D"http=
s://www.ietf.org/mailman/listinfo/ace">https://www.ietf.org/mailman/listinf=
o/ace</a><br></font></div></ace-bounces@ietf.org></hannes.tschofenig@arm.co=
m></div></div></font><p>=3D=3D=3D=3D=3D-----=3D=3D=3D=3D=3D-----=3D=3D=3D=
=3D=3D<br>
Notice: The information contained in this e-mail<br>
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To: Michael Richardson <mcr+ietf@sandelman.ca>, "ace@ietf.org" <ace@ietf.org>
Thread-Topic: [Ace] Application Layer TLS
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Subject: Re: [Ace] Application Layer TLS
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Someone had pointed it out on the mic in ACE @ IETF99, I think. Redefining =
well established protocol functionality like (D)TLS' to secure communicatio=
ns of other unencrypted application protocols comes with the risks of lack =
of vetting and scrutiny, test of time and mistakes though.=20

I am not against this work, but I have seen many new secure protection chan=
nel establishment protocols and I am not sure there are no issues  which we=
 don't see now that will manifest themselves later.=20



-----Original Message-----
From: Ace [mailto:ace-bounces@ietf.org] On Behalf Of Michael Richardson
Sent: Tuesday, November 21, 2017 1:48 PM
To: ace@ietf.org
Cc: Derek Atkins <derek@ihtfp.com>
Subject: Re: [Ace] Application Layer TLS


Derek Atkins <derek@ihtfp.com> wrote:
    >> based on the recent email discussion about the DTLS proxy I thought =
it might
    >> be useful that there was some thinking about how to run TLS/DTLS at =
the
    >> application layer.

    > I don't understand this statement.  The whole point of TLS/DTLS is th=
at
    > it runs at the Application Layer (as opposed to at the network layer,

DTLS has to provide many of the services of the Transport and Network layer=
 (various amounts of reliability, fragmentation/segmentation) and there is =
overhead in that.  When running over things like CoAP, which *ALSO* provide=
s those services, and in a more constrained network happy way, DTLS is way =
less appealing.

    > Perhaps we need a better naming scheme here.

In my opinion, the ISO layer naming system has always been better as docume=
ntation, rather than architecture :-)

--
Michael Richardson <mcr+IETF@sandelman.ca>, Sandelman Software Works  -=3D =
IPv6 IoT consulting =3D-




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From: Hannes Tschofenig <Hannes.Tschofenig@arm.com>
To: Derek Atkins <derek@ihtfp.com>
CC: "ace@ietf.org" <ace@ietf.org>
Thread-Topic: [Ace] Application Layer TLS
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Subject: Re: [Ace] Application Layer TLS
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Hi Derek

There might indeed be room for improvement on the terminology front. I was =
using the "application layer TLS terminology" because it was used in discus=
sions in the TLS working group and at the TLS WG session @ IETF#100.

I suspect that the use cases in various documents, which differ slightly, m=
ight give a better idea what we try to accomplish.

Ciao
Hannes

-----Original Message-----
From: Derek Atkins [mailto:derek@ihtfp.com]
Sent: 21 November 2017 18:34
To: Hannes Tschofenig
Cc: ace@ietf.org
Subject: Re: [Ace] Application Layer TLS

Hannes,

Hannes Tschofenig <Hannes.Tschofenig@arm.com> writes:

> Hi all,
>
> based on the recent email discussion about the DTLS proxy I thought it
> might be useful that there was some thinking about how to run TLS/DTLS
> at the application layer.

I don't understand this statement.  The whole point of TLS/DTLS is that it =
runs at the Application Layer (as opposed to at the network layer, like IPs=
ec).  Indeed, the fact that it could run at the application layer (e.g. in =
a web brower / web server) is exactly why SSL/TLS was created in the first =
place.  It meant you didn't require waiting for the kernel/OS to add networ=
k security.

> There are essentially two drafts that have been submitted at the same
> time for IETF#100, namely
>
> https://tools.ietf.org/html/draft-tschofenig-layered-tls-00
>
> https://tools.ietf.org/html/draft-friel-tls-over-http-00

So you are moving the application layer up even higher than the historic vi=
ew of an application layer?

Perhaps we need a better naming scheme here.

> Both teams have worked on prototypes and getting it to work was
> remarkably simple.

-derek
--
       Derek Atkins                 617-623-3745
       derek@ihtfp.com             www.ihtfp.com
       Computer and Internet Security Consultant
IMPORTANT NOTICE: The contents of this email and any attachments are confid=
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Subject: Re: [Ace] WGLC on draft-ietf-ace-cbor-web-token (ends 29 November)
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Reminder: there is only one week left in this WGLC.

-Ben

On Wed, Nov 01, 2017 at 12:24:56PM -0500, Benjamin Kaduk wrote:
> This message begins a working group last call for
> draft-ietf-ace-cbor-web-token for submission as a Standards-Track RFC,
> ending at 23:59 PST on Wednesday 29 November, 2017.
> 
> The current (-09) version of the document is available at:
> https://tools.ietf.org/html/draft-ietf-ace-cbor-web-token-09 .
> 
> Thanks,
> 
> Ben and Jim
> 
> _______________________________________________
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> Ace@ietf.org
> https://www.ietf.org/mailman/listinfo/ace


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To: "ace@ietf.org" <ace@ietf.org>, <draft-ietf-ace-cbor-web-token.authors@ietf.org>
References: <20171101172455.GT26855@kduck.kaduk.org> <20171123003050.GZ82825@kduck.kaduk.org>
From: Ludwig Seitz <ludwig.seitz@ri.se>
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Subject: Re: [Ace] WGLC on draft-ietf-ace-cbor-web-token (ends 29 November)
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Hi ACE,

I have only some nits on the CWT draft (see below).


/Ludwig

========================================================

I'm not sure what the RFC editors prefer as affiliation
(I've seen both):

--
E. Wahlstroem

--  OR
E. Wahlstroem
(no affiliation)
--


===
2. Terminology

In the RFC 2119 boilerplate I noticed that only MUST, MUST NOT and NOT 
RECOMMENDED is used in the draft. What is the recommended procedure 
here? It feels like we could remove the other ones.

===

"CWT Claims Set

   The CBOR map that ..."

Why is a map called a set here? I know what is meant, but it sound 
really weird.

===

Sections 3.1.*

The links to sections in JWT point to sections in this draft instead
(at least in the html-ised version of the draft).

See:
https://xml2rfc.tools.ietf.org/xml2rfcFAQ.html#anchor18

for hints on how to fix this.

===

Figure 1:  Perhaps indicate the CBOR major type number together with the
"Value type" text.


===



-- 
Ludwig Seitz, PhD
Security Lab, RISE SICS
Phone +46(0)70-349 92 51


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From: Carsten Bormann <cabo@tzi.org>
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Subject: Re: [Ace] WGLC on draft-ietf-ace-cbor-web-token (ends 29 November)
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Hi Ludwig,

> I'm not sure what the RFC editors prefer as affiliation
> (I've seen both):
>=20
> --
> E. Wahlstroem
>=20
> --  OR
> E. Wahlstroem
> (no affiliation)
> =E2=80=94

I don=E2=80=99t know what the RFC editor prefers her, but I find =E2=80=9C=
no affiliation=E2=80=9D jarring =E2=80=94 leaving the space open is much =
better.

> =3D=3D=3D
> 2. Terminology
>=20
> In the RFC 2119 boilerplate I noticed that only MUST, MUST NOT and NOT =
RECOMMENDED is used in the draft. What is the recommended procedure =
here? It feels like we could remove the other ones.

It is usual to include the whole boilerplate (obviously the corrected =
one, with NOT RECOMMENDED included, in this case).

> =3D=3D=3D
>=20
> "CWT Claims Set
>=20
>  The CBOR map that ..."
>=20
> Why is a map called a set here? I know what is meant, but it sound =
really weird.

Because a claim is a pair of map key and map value, so the whole thing =
is indeed a set of claims (with the additional restriction that a key =
can only be used once; hence we need array-valued map values).

(The term =E2=80=9Cclaim" is misleading and wrong here, but that is =
inherited from JWT.)

> =3D=3D=3D
>=20
> Sections 3.1.*
>=20
> The links to sections in JWT point to sections in this draft instead
> (at least in the html-ised version of the draft).
>=20
> See:
> https://xml2rfc.tools.ietf.org/xml2rfcFAQ.html#anchor18
>=20
> for hints on how to fix this.

Somewhat temporary, but a useful thing to change.

>=20
> =3D=3D=3D
>=20
> Figure 1:  Perhaps indicate the CBOR major type number together with =
the
> "Value type" text.

Or perhaps don=E2=80=99t?  The major type number is something that is =
internal to the serialization; standards using RFC 7049 should not try =
to repeat internals of RFC 7049 all over the place.
I=E2=80=99d prefer to use the data model level names as it is specified =
now.

My editorial comment on this is that this should be a table, not ASCII =
art.

Gr=C3=BC=C3=9Fe, Carsten


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CC: "ace@ietf.org" <ace@ietf.org>
References: <20171101172455.GT26855@kduck.kaduk.org> <20171123003050.GZ82825@kduck.kaduk.org> <fb273e0c-fa5e-e6c0-ecd9-a4515eee0728@ri.se> <94F0F425-7AF7-435C-8CC8-484B30A296D5@tzi.org>
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Subject: Re: [Ace] WGLC on draft-ietf-ace-cbor-web-token (ends 29 November)
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On 2017-11-23 11:55, Carsten Bormann wrote:

>> 
>> Figure 1:  Perhaps indicate the CBOR major type number together
>> with the "Value type" text.
> 
> Or perhaps don’t?  The major type number is something that is
> internal to the serialization; standards using RFC 7049 should not
> try to repeat internals of RFC 7049 all over the place. I’d prefer to
> use the data model level names as it is specified now.

I'll take that as an input to draft-ietf-ace-oauth-authz as well then.

Btw Carsten, can you review that one at some point? I think you input 
would be valuable (we have reviews from a few OAuth experts, but not so 
many from CoRE experts).

/Ludwig

-- 
Ludwig Seitz, PhD
Security Lab, RISE SICS
Phone +46(0)70-349 92 51


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Date: Fri, 24 Nov 2017 21:55:09 -0600
From: Benjamin Kaduk <kaduk@mit.edu>
To: Carsten Bormann <cabo@tzi.org>
Cc: Ludwig Seitz <ludwig.seitz@ri.se>, draft-ietf-ace-cbor-web-token.authors@ietf.org, "ace@ietf.org" <ace@ietf.org>
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Subject: Re: [Ace] WGLC on draft-ietf-ace-cbor-web-token (ends 29 November)
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On Thu, Nov 23, 2017 at 11:55:46AM +0100, Carsten Bormann wrote:
> Hi Ludwig,
> 
> > I'm not sure what the RFC editors prefer as affiliation
> > (I've seen both):
> > 
> > --
> > E. Wahlstroem
> > 
> > --  OR
> > E. Wahlstroem
> > (no affiliation)
> > —
> 
> I don’t know what the RFC editor prefers her, but I find “no affiliation” jarring — leaving the space open is much better.

I also sometimes see "Unaffliated".

> > ===
> > 2. Terminology
> > 
> > In the RFC 2119 boilerplate I noticed that only MUST, MUST NOT and NOT RECOMMENDED is used in the draft. What is the recommended procedure here? It feels like we could remove the other ones.
> 
> It is usual to include the whole boilerplate (obviously the corrected one, with NOT RECOMMENDED included, in this case).

Right, at this point people should be citing BCP 14/RFC 8174.

-Ben


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From: Samuel Erdtman <samuel@erdtman.se>
Date: Tue, 28 Nov 2017 13:25:21 +0100
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To: Ludwig Seitz <ludwig.seitz@ri.se>, Carsten Bormann <cabo@tzi.org>, Benjamin Kaduk <kaduk@mit.edu>
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Subject: Re: [Ace] WGLC on draft-ietf-ace-cbor-web-token (ends 29 November)
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Thanks for the review Ludwig, it is really appreciated.

see inline

On Thu, Nov 23, 2017 at 10:25 AM, Ludwig Seitz <ludwig.seitz@ri.se> wrote:

> Hi ACE,
>
> I have only some nits on the CWT draft (see below).
>
>
> /Ludwig
>
> ========================================================
>
> I'm not sure what the RFC editors prefer as affiliation
> (I've seen both):
>
> --
> E. Wahlstroem
>
> --  OR
> E. Wahlstroem
> (no affiliation)
> --
>

I would prefere the empty space. The xml doc does not contain any text and
when submitting to http://xml2rfc.tools.ietf.org/ I get the empty line.

If co-authors agree I think we need to do something when submitting the new
draft.


>
>
> ===
> 2. Terminology
>
> In the RFC 2119 boilerplate I noticed that only MUST, MUST NOT and NOT
> RECOMMENDED is used in the draft. What is the recommended procedure here?
> It feels like we could remove the other ones.
>
> ===
>

I agree with Carsten that the full template should be used. and I agree
with Benjamin that we should use the latest version.
I have created a PR that is waiting for review by co-authors.


>
> "CWT Claims Set
>
>   The CBOR map that ..."
>
> Why is a map called a set here? I know what is meant, but it sound really
> weird.
>

I think the is the right way to phrase it.


>
> ===
>
> Sections 3.1.*
>
> The links to sections in JWT point to sections in this draft instead
> (at least in the html-ised version of the draft).
>
> See:
> https://xml2rfc.tools.ietf.org/xml2rfcFAQ.html#anchor18
>
> for hints on how to fix this.
>

I have created a PR that is waiting for review by co-authors.


> ===
>
> Figure 1:  Perhaps indicate the CBOR major type number together with the
> "Value type" text.
>

I agree with Carsten, we have had this discussion before.

I have created a PR changing from ascii art to table (waiting for review by
co-authors)


>
> ===
>
>
>
> --
> Ludwig Seitz, PhD
> Security Lab, RISE SICS
> Phone +46(0)70-349 92 51
>
>
> _______________________________________________
> Ace mailing list
> Ace@ietf.org
> https://www.ietf.org/mailman/listinfo/ace
>

--f403043636eadbf7a5055f0a1ccf
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr">Thanks for the review Ludwig, it is really appreciated.<br=
><div><br>see inline<br><div class=3D"gmail_extra"><br><div class=3D"gmail_=
quote">On Thu, Nov 23, 2017 at 10:25 AM, Ludwig Seitz <span dir=3D"ltr">&lt=
;<a href=3D"mailto:ludwig.seitz@ri.se" target=3D"_blank">ludwig.seitz@ri.se=
</a>&gt;</span> wrote:<br><blockquote class=3D"gmail_quote" style=3D"margin=
:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"=
>Hi ACE,<br>
<br>
I have only some nits on the CWT draft (see below).<br>
<br>
<br>
/Ludwig<br>
<br>
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D<wbr>=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D<br>
<br>
I&#39;m not sure what the RFC editors prefer as affiliation<br>
(I&#39;ve seen both):<br>
<br>
--<br>
E. Wahlstroem<br>
<br>
--=C2=A0 OR<br>
E. Wahlstroem<br>
(no affiliation)<br>
--<br></blockquote><div><br></div><div>I would prefere the empty space. The=
 xml doc does not contain any text and when submitting to <a href=3D"http:/=
/xml2rfc.tools.ietf.org/">http://xml2rfc.tools.ietf.org/</a> I get the empt=
y line.</div><div><br></div><div>If co-authors agree I think we need to do =
something when submitting the new draft.<br></div><div>=C2=A0</div><blockqu=
ote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px=
 solid rgb(204,204,204);padding-left:1ex">
<br>
<br>
=3D=3D=3D<br>
2. Terminology<br>
<br>
In the RFC 2119 boilerplate I noticed that only MUST, MUST NOT and NOT RECO=
MMENDED is used in the draft. What is the recommended procedure here? It fe=
els like we could remove the other ones.<br>
<br>
=3D=3D=3D<br></blockquote><div><br></div><div>I agree with Carsten that the=
 full template should be used. and I agree with Benjamin that we should use=
 the latest version.</div><div>I have created a PR that is waiting for revi=
ew by co-authors.<br></div><div>=C2=A0</div><blockquote class=3D"gmail_quot=
e" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204)=
;padding-left:1ex">
<br>
&quot;CWT Claims Set<br>
<br>
=C2=A0 The CBOR map that ...&quot;<br>
<br>
Why is a map called a set here? I know what is meant, but it sound really w=
eird.<br></blockquote><div><br></div><div>I think the is the right way to p=
hrase it.<br></div><div>=C2=A0</div><blockquote class=3D"gmail_quote" style=
=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding=
-left:1ex">
<br>
=3D=3D=3D<br>
<br>
Sections 3.1.*<br>
<br>
The links to sections in JWT point to sections in this draft instead<br>
(at least in the html-ised version of the draft).<br>
<br>
See:<br>
<a href=3D"https://xml2rfc.tools.ietf.org/xml2rfcFAQ.html#anchor18" rel=3D"=
noreferrer" target=3D"_blank">https://xml2rfc.tools.ietf.org<wbr>/xml2rfcFA=
Q.html#anchor18</a><br>
<br>
for hints on how to fix this.<br></blockquote><div><br></div><div>I have cr=
eated a PR that is waiting for review by co-authors.<br></div><div> <br></d=
iv><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;bord=
er-left:1px solid rgb(204,204,204);padding-left:1ex">
<br>
=3D=3D=3D<br>
<br>
Figure 1:=C2=A0 Perhaps indicate the CBOR major type number together with t=
he<br>
&quot;Value type&quot; text.<br></blockquote><div><br></div><div>I agree wi=
th Carsten, we have had this discussion before.</div><div><br></div><div>I =
have created a PR changing from ascii art to table (waiting for review by c=
o-authors)<br></div><div><br></div><blockquote class=3D"gmail_quote" style=
=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding=
-left:1ex">
<br>
<br>
=3D=3D=3D<span class=3D"gmail-HOEnZb"><font color=3D"#888888"><br>
<br>
<br>
<br>
-- <br>
Ludwig Seitz, PhD<br>
Security Lab, RISE SICS<br>
Phone <a href=3D"tel:%2B46%280%2970-349%2092%2051" value=3D"+46703499251" t=
arget=3D"_blank">+46(0)70-349 92 51</a></font></span><div class=3D"gmail-HO=
EnZb"><div class=3D"gmail-h5"><br>
<br>
______________________________<wbr>_________________<br>
Ace mailing list<br>
<a href=3D"mailto:Ace@ietf.org" target=3D"_blank">Ace@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/ace" rel=3D"noreferrer" ta=
rget=3D"_blank">https://www.ietf.org/mailman/l<wbr>istinfo/ace</a><br>
</div></div></blockquote></div><br></div></div></div>

--f403043636eadbf7a5055f0a1ccf--

