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From: "Max Pritikin (pritikin)" <pritikin@cisco.com>
To: "Jason Coleman (colemaj)" <colemaj@cisco.com>, "mcr+ietf@sandelman.ca" <mcr+ietf@sandelman.ca>, "ietf@sandeep.de" <ietf@sandeep.de>, "Michael Behringer (mbehring)" <mbehring@cisco.com>, "alper.yegin@yegin.org" <alper.yegin@yegin.org>, "jiangsheng@huawei.com" <jiangsheng@huawei.com>, "leo.liubing@huawei.com" <leo.liubing@huawei.com>, "brian.e.carpenter@gmail.com" <brian.e.carpenter@gmail.com>, "kwatsen@juniper.net" <kwatsen@juniper.net>, "anima-bootstrap@ietf.org" <anima-bootstrap@ietf.org>, "tte+anima@cs.fau.de" <tte+anima@cs.fau.de>
Thread-Topic: UPDATE: Weekly anima-bootstrap meeting
Thread-Index: AdIIjJyVsl3sxGXZtESwhir0RfpNbw==
Date: Tue, 6 Sep 2016 22:25:43 +0000
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Subject: [Anima-bootstrap] UPDATE: Weekly anima-bootstrap meeting
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This replaces the ongoing bootstrap design team standing meeting. It should=
 be at the same time etc. Just a new webex link. This recurring meeting ter=
minates at the Seoul meeting (at which point we can reschedule).


Etherpad:
http://etherpad.tools.ietf.org:9000/p/anima-boostrapping?useMonospaceFont=
=3Dtrue
(note typo in boostrapping)


=97=97=97






-- Do not delete or change any of the following text. --


Join WebEx meeting<https://cisco.webex.com/ciscosales/j.php?MTID=3Dma063d9e=
feede668658e75e63d877005f>
Meeting number: 201 064 739
Meeting password: arWidrPz (27943779 from phones)


If you are a host, go here<https://cisco.webex.com/ciscosales/j.php?MTID=3D=
m50c4277f5c5567f1a623d9e68d954633> to view host information.

Join by phone
+1-408-525-6800 Call-in toll number (US/Canada)
+1-866-432-9903 Call-in toll-free number (US/Canada)
Access code: 201 064 739
Global call-in numbers<https://cisco.webex.com/ciscosales/globalcallin.php?=
serviceType=3DMC&ED=3D362127397&tollFree=3D1>  |  Toll-free calling restric=
tions<https://www.webex.com/pdf/tollfree_restrictions.pdf>


Can't join the meeting? Contact support.<https://cisco.webex.com/ciscosales=
/mc>

IMPORTANT NOTICE: Please note that this WebEx service allows audio and othe=
r information sent during the session to be recorded, which may be discover=
able in a legal matter. By joining this session, you automatically consent =
to such recordings. If you do not consent to being recorded, discuss your c=
oncerns with the host or do not join the session..

--_000_77a08305bd734624902d983e5466e8deXCHALN013ciscocom_
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Content-Transfer-Encoding: quoted-printable

<html>
<head>
<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3DWindows-1=
252">
</head>
<body style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-lin=
e-break: after-white-space; color: rgb(0, 0, 0); font-size: 14px; font-fami=
ly: Calibri, sans-serif;">
<div><br>
</div>
<div>
<div>This replaces the ongoing bootstrap design team standing meeting. It s=
hould be at the same time etc. Just a new webex link. This recurring meetin=
g terminates at the Seoul meeting (at which point we can reschedule).
</div>
<div><br>
</div>
<div>Etherpad:</div>
<div>http://etherpad.tools.ietf.org:9000/p/anima-boostrapping?useMonospaceF=
ont=3Dtrue</div>
<div>(note typo in boostrapping)</div>
</div>
<div><br>
</div>
<div>=97=97=97</div>
<div><br>
</div>
<div><br>
</div>
<font face=3D"ARIAL"><br>
<br>
</font><font size=3D"1" face=3D"ARIAL"><font size=3D"2" color=3D"#666666" f=
ace=3D"ARIAL">-<a name=3D"MacBeginWBXTag"></a>- Do not delete or change any=
 of the following text. --</font>
<br>
<br>
<br>
<font size=3D"4" face=3D"ARIAL"><a href=3D"https://cisco.webex.com/ciscosal=
es/j.php?MTID=3Dma063d9efeede668658e75e63d877005f"><font size=3D"3" color=
=3D"#00AFF9" face=3D"ARIAL">Join WebEx meeting</font></a>
<br>
<font size=3D"2" color=3D"#666666" face=3D"ARIAL">Meeting number: 201 064 7=
39</font> <br>
<font size=3D"2" color=3D"#666666" face=3D"Segoe UI">Meeting password:</fon=
t> <font size=3D"2" color=3D"#666666" face=3D"Segoe UI">
arWidrPz (27943779 from phones)</font> <br>
</font><br>
<br>
<font size=3D"2" color=3D"#666666" face=3D"Segoe UI">If you are a host, </f=
ont><a href=3D"https://cisco.webex.com/ciscosales/j.php?MTID=3Dm50c4277f5c5=
567f1a623d9e68d954633"><font size=3D"2" color=3D"#00AFF9" face=3D"Segoe UI"=
>go here</font></a><font size=3D"2" color=3D"#666666" face=3D"Segoe UI">
 to view host information.</font><br>
<br>
<font size=3D"4" face=3D"ARIAL"><font size=3D"3" color=3D"#666666" face=3D"=
arial">Join by phone</font>
<br>
<font size=3D"2" color=3D"#666666" face=3D"Segoe UI"><strong>&#43;1-408-525=
-6800</strong> Call-in toll number (US/Canada)</font>
<br>
<font size=3D"2" color=3D"#666666" face=3D"Segoe UI"><strong>&#43;1-866-432=
-9903</strong> Call-in toll-free number (US/Canada)</font>
<br>
<font size=3D"2" color=3D"#666666" face=3D"arial">Access code: 201 064 739<=
/font> <br>
<a href=3D"https://cisco.webex.com/ciscosales/globalcallin.php?serviceType=
=3DMC&amp;ED=3D362127397&amp;tollFree=3D1"><font size=3D"1" color=3D"#00AFF=
9" face=3D"arial">Global call-in numbers</font></a><font size=3D"1" face=3D=
"ARIAL"> |
</font><a href=3D"https://www.webex.com/pdf/tollfree_restrictions.pdf"><fon=
t size=3D"1" color=3D"#00AFF9" face=3D"arial">Toll-free calling restriction=
s</font></a>
<br>
</font><br>
<br>
<font size=3D"1" color=3D"#666666" face=3D"arial">Can't join the meeting?</=
font> <a href=3D"https://cisco.webex.com/ciscosales/mc">
<font size=3D"1" color=3D"#00AFF9" face=3D"Arial">Contact support.</font></=
a> <br>
<br>
<font color=3D"#A0A0A0" size=3D"1" face=3D"arial">IMPORTANT NOTICE: Please =
note that this WebEx service allows audio and other information sent during=
 the session to be recorded, which may be discoverable in a legal matter. B=
y joining this session, you automatically
 consent to such recordings. If you do not consent to being recorded, discu=
ss your concerns with the host or do not join the session..<a name=3D"MacEn=
dWBXTag"></a></font>
</font>
</body>
</html>

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Subject: Re: [Anima-bootstrap] [6tisch-security] developments on 6tisch join scheduling
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{after some days in the drafts queue}

Pascal Thubert (pthubert) <pthubert@cisco.com> wrote:
    > About your subdivision:

    > One may note that to root sees it all, and it the ultimate limit of the
    > bandwidth that may be given to join process.

Yes. Very much agreed, and I want to subordinate all join scheduling to the
limit that the root has established.

    > The bigger the network the slower a given JA can accept new joins. And
    > the deeper the JA, the more overall resources will be consumed by a
    > join.

    > Since this is dynamic and dependent on the network, it may be that we
    > need the root to provide JAs with a MTBJ (mean time between joins) that
    > depends on the rank or something.

Yes, that was essentially my goal.


    > We can wonder if the root itself could be the proxy, being triggered by
    > a DAR message as you described. The root can afford to maintain an EST
    > session.
    > The root would arbitrate when that request is being served. And that
    > the root may instruct in the DAC when the device is entitled to
    > continue its join process.

Yes, this is what I want to do: add something to the DAC that instructions
the new device when it should retry.

    > For this purpose, the DIO may contain new information about root
    > capabilities in the DODAG Configuration option.

I agree that the root ought to have the resources to maintain sessions if
needed, but I don't know if we need that.  The DTLS (or EDHOC) session itself
needs to extend to the new pledge for cryptographic reasons.

    >> What is needed is a way to adjust things so that the pledges will attempt to join
    >> in a way that does not overwhelm the network, and more so, that the proxy
    >> nodes can easily police that they are doing so.

...

    >> This is where the hard part is, how to come up with a simple to describe, and
    >> simple to code algorithm which would fill up the available bandwidth, and be
    >> easily subdividable.

Upon further reflection, I think that the 6LBR shall decide and provide the
interval via the DAC.


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




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This replaces the ongoing bootstrap design team standing meeting. It should=
 be at the same time etc. Just a new webex link. This recurring meeting ter=
minates at the Seoul meeting (at which point we can reschedule).


Etherpad:
http://etherpad.tools.ietf.org:9000/p/anima-boostrapping?useMonospaceFont=
=3Dtrue
(note typo in boostrapping)


=97=97=97






-- Do not delete or change any of the following text. --


Join WebEx meeting<https://cisco.webex.com/ciscosales/j.php?MTID=3Dma063d9e=
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Meeting number: 201 064 739
Meeting password: arWidrPz (27943779 from phones)


If you are a host, go here<https://cisco.webex.com/ciscosales/j.php?MTID=3D=
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Join by phone
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serviceType=3DMC&ED=3D362127397&tollFree=3D1>  |  Toll-free calling restric=
tions<https://www.webex.com/pdf/tollfree_restrictions.pdf>


Can't join the meeting? Contact support.<https://cisco.webex.com/ciscosales=
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IMPORTANT NOTICE: Please note that this WebEx service allows audio and othe=
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--_000_d3728d5953274ad8a66d8b660ae4fcdeXCHALN013ciscocom_
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<html>
<head>
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252">
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e-break: after-white-space; color: rgb(0, 0, 0); font-size: 14px; font-fami=
ly: Calibri, sans-serif;">
<div><br>
</div>
<div>
<div>This replaces the ongoing bootstrap design team standing meeting. It s=
hould be at the same time etc. Just a new webex link. This recurring meetin=
g terminates at the Seoul meeting (at which point we can reschedule).
</div>
<div><br>
</div>
<div>Etherpad:</div>
<div>http://etherpad.tools.ietf.org:9000/p/anima-boostrapping?useMonospaceF=
ont=3Dtrue</div>
<div>(note typo in boostrapping)</div>
</div>
<div><br>
</div>
<div>=97=97=97</div>
<div><br>
</div>
<div><br>
</div>
<font face=3D"ARIAL"><br>
<br>
</font><font size=3D"1" face=3D"ARIAL"><font size=3D"2" color=3D"#666666" f=
ace=3D"ARIAL">-<a name=3D"MacBeginWBXTag"></a>- Do not delete or change any=
 of the following text. --</font>
<br>
<br>
<br>
<font size=3D"4" face=3D"ARIAL"><a href=3D"https://cisco.webex.com/ciscosal=
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<font size=3D"2" color=3D"#666666" face=3D"ARIAL">Meeting number: 201 064 7=
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<font size=3D"2" color=3D"#666666" face=3D"Segoe UI">Meeting password:</fon=
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<font size=3D"1" color=3D"#00AFF9" face=3D"Arial">Contact support.</font></=
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<br>
<font color=3D"#A0A0A0" size=3D"1" face=3D"arial">IMPORTANT NOTICE: Please =
note that this WebEx service allows audio and other information sent during=
 the session to be recorded, which may be discoverable in a legal matter. B=
y joining this session, you automatically
 consent to such recordings. If you do not consent to being recorded, discu=
ss your concerns with the host or do not join the session..<a name=3D"MacEn=
dWBXTag"></a></font>
</font>
</body>
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--_000_d3728d5953274ad8a66d8b660ae4fcdeXCHALN013ciscocom_--


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To: Anima signaling DT <anima-signaling@ietf.org>, anima-bootstrap@ietf.org
From: Brian E Carpenter <brian.e.carpenter@gmail.com>
Organization: University of Auckland
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Date: Wed, 14 Sep 2016 14:18:04 +1200
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Archived-At: <https://mailarchive.ietf.org/arch/msg/anima-bootstrap/a4lU0CbLxI9h8xWZbnj1-p756Hc>
Subject: [Anima-bootstrap] GRASP and BRSKI
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(apologies for any duplicates)

I've been playing around to verify that GRASP as currently
defined can support the secure bootstrap discovery requirements
(i.e. proxy discovering registrars, and joining node (pledge)
discovering proxies).

I think we agreed that a registrar should broadcast its presence
(by flooding out its coordinates across the AN), so that's
what I modelled.

Toerless wanted to emulate the priority/weight parameters
available in mDNS and to know the distance (hop count) to each
registrar. I included that; it would be easy to remove.

There seemed to be some lack of consensus about whether pledges
should broadcast their presence (by sending a link-local discovery
multicast) or whether the proxy should broadcast *its* presence
(by flooding out its coordinates on-link). I modelled both methods.
The bootstrap team does need to choose.

Pledge broadcasts:
- pledge has to do two steps [discover() and synchronize()]
instead of one [get_flood()].
- on-link attacker knows that the pledge exists and (knowing its
address) might be able to intercept its subsequent unicast BRSKI
messages if promiscuous mode is possible.
- nothing stops an attacker from discovering the proxy by acting
like a pledge and then attacking it directly.

Proxy broadcasts:
- on-link attacker will not be told that a pledge exists (but might
still be able to intercept its unicast BRSKI messages if promiscuous
mode is possible).
- nothing stops an attacker from attacking the proxy directly.

Running code, of a sort, is at
https://www.cs.auckland.ac.nz/~brian/graspy/brski/

Please start with the README file.

Regards
   Brian


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Subject: [Anima-bootstrap] DRAFT minutes up to 2016-09-13
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--=-=-=
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This set of minutes covers meetings in August 2016 and September 2016,
up to September 13, 2016.  Warning: fixed-width ASCII art, pick the right
font, or it will probably be unreadable.  Please contribute corrections.

Previous minutes were posted on August 16 for meetings after IETF96.
         https://www.ietf.org/mail-archive/web/netconf/current/msg11652.html

A history of meetings covered:
  2016-08-23 - Max, Kent, mcr on mobile
  2016-08-30 - mcr away camping, Max got dragged elsewhere, meeting
               was cancelled.
  2016-09-06 - Max, Kent, mcr
  2016-09-13 - Max, Kent, mcr, Toerless, Michael Behringer (muted entire ti=
me?)

Future meetings:
  2016-09-20, 2016-09-27, 2016-10-04, 2016-10-11,
  2016-10-18, 2016-10-25, 2016-11-01.
  2016-11-08 -- cancelled, too close to IETF97.


0) the old webex expired, and a new one was created.
   WEEKLY INVITE, SEE ANIMA BOOTSTRAP WIKI:
        https://trac.tools.ietf.org/wg/anima/trac/wiki/Bootstrap


1) The chairs queried us about whether we were "done yet", and the answer w=
as
   that we need another two weeks to beat on your document.
   EXEC SUMMARY:  We have essentially specified pretty much everything,
                  but some doubts have arrived as to whether our chosen
                  architecture and technologies are the best, and we are
                  letting ourselves decide if there are some critical
                  decisions we should revise NOW.
                  In particular, those decisions align the technology better
                  with both NETCONF and IoT needs, and may be also result
                  in a simpler security footprint.




  2016-08-23 - Max, Kent, mcr on mobile
  2016-08-30 - mcr away camping
  2016-09-06 - Max, Kent, mcr
  2016-09-13 - Max, Kent, mcr, Toerless, Michael Behringer (muted entire ti=
me?)

2) At the 2016-08-16, as previously minuted, the decision arrived that we
want to have a WG document (Informational) about the ownership voucher.
During subsequent discussions, further discussions suggest that in fact it =
is
not a private matter, and that it probably (reading between lines) should
be a standards track specification, or a reference to such a document.

It was suggested that OAUTH bound tokens might provide the right model,
or perhaps JSON Web Tokens, or ???

cf:
   https://tools.ietf.org/html/rfc6750
   https://tools.ietf.org/html/draft-wahlstroem-ace-cbor-web-token-00

We discussed whether we could just have the ownership voucher definition
pasted into the BRSKI document in a way that made it clear it was mostly
identical to the netconf format, but the pushback was that having it in
a clear document referenced by both made it clear that it was the same thin=
g.
The value of having a single document was mostly a process simplification
concern, and letting us move forward.

ACTION: Kent said he would start a document in his git repo, but I don't
        think that actually happened yet, unless it was system-keychain?


3) mcr was uncomfortable with the level of detail/protocol around getting
   the pledge to put the "right things" into the CSR.

A number pointers were inserted into the notes:

  https://tools.ietf.org/html/draft-ietf-anima-bootstrapping-keyinfra-03#se=
ction-5.7.2

  https://tools.ietf.org/html/draft-ietf-netconf-system-keychain-00#section=
-3
  section https://tools.ietf.org/html/draft-ietf-netconf-system-keychain-00=
#section-2.3

includes YANG action statement "generate-certifacte-signing-request" that
takes input PKCS#10 structures 'subject' and 'attributes', and generates
output structure 'certificate-signing-request' (the CSR itself).

ACTION ITEM (max): form an articulate position on how this push model
         discussion migth integrate with the anima pull model -- as a thoug=
ht
         excercise.

         NOTE from mcr: 6tisch would prefer a pull model (server/NMS
                  initiated) as well for bandwidth management reasons, and
                  I'm trying to reverse it back to client initiated, with
                  some way to manage bandwidth...


4) the 2016-09-06 and 2016-09-13 meetings dealt a lot with the notion of
   roles and role reversals, and much terminology was abused, and confused.

We wrote some definitions, which are reorganized in these minutes as follow=
s:

Actors are: 1) new device ("pledge")
            2) registrar (ANIMA term)
               management system (NETCONF) ("NMS")
               JCE (6tisch)

The roles that can be taken are:
a) TCP-initiator ("SYN")
b) TCP-responder ("SYN+ACK")
c) TLS-client
d) TLS-server
e) HTTP client/CoAP client
f) HTTP server/CoAP server
g) RESTCONF client / 6p client
h) RESTCONF server / 6p server
i) EST (7030) client
j) EST (7030) server


I) The ANIMA cast list is as follows:
    i) pledge is TCP-initiator, TLS-client, HTTP/EST client.
   ii) registar is TCP-responder, TLS-server, EST server.

II) In NETCONF, cast list is as follows:
    i) pledge is TCP-initiator, TLS-server, RESTCONF server.
   ii) NMS is TCP-responder, TLS-client, RESTCONF client.

III) In 6tisch, cast list is as follows:
    i) pledge is DAD-client, DTLS-server, CoAP server, 6p server.
   ii) JCE is DTLS-client, CoAP-client, 6p client.
      [Only maybe DTLS is replaced with EDHOC]


We had some significant discussions about the advantage of the NETCONF
"call-home" role reversal, and explained in this time sequence diagram that
has the TCP and TLS activities:

FIGURE 20160906: Solution Overview

      NETCONF/RESTCONF                    NETCONF/RESTCONF
           Server (h)                        Client (g)
        (anima new device)                  (anima registrar)
         |                                    |
         |         1. TCP                     |
         |-------------SYN------------------->|  Just a SYN, SYN/ACK.
         |<------------SYN/ACK----------------|
         |                                    |
         |                                    |
         |         2. SSH/TLS                 |
         |<------------ClientHello------------| same TCP connection.
         |-------------ServerHello-(cert)---->| Registrar verifies
         |                                    |  802.1AR cert, and
         |                                    |  obtains auth token
         |<------------client cert------------| <- client cert
         |                                    |    =3D ownership voucher/au=
th
         |                                    |      token
         |<------------extension auth token---| * modification or
         |                                    |   extensions to TLS handsha=
ke
         |                                    |
         |                                    |  (NOTE: This is an idea
         |                                    |    around optimizing the
         |                                    |  initial authentication.
         |                                    |   netconf/restconf
         |                                    |   DOES NOT explore this eit=
her)
         |   continue with BRSKI or           |
         |          NETCONF/RESTCONF etc:     |
         |         3. NETCONF/RESTCONF        |
         |<-----------------------------------|
         |                                    |
         Note: arrows point from the "client" to
          the "server" at each protocol layer


It was noting:  By flipping the TLS connection the handshake works out nice=
ly
   in our favor: the TLSCertificate payload is the 802.1AR cert and then
   *after* it is authenticated the client could respond with the ownership
   voucher cert  assuming the necessary extension could be defined.

some additional TLS time sequence diagrams:
     https://www.cs.cmu.edu/~mmaass/tpm_tls/report.html
or   http://etutorials.org/shared/images/tutorials/tutorial_113/09fig03.gif
or   https://tools.ietf.org/html/rfc5878#section-6

Compare this to the flow in BRSKI:
   https://tools.ietf.org/html/draft-ietf-anima-bootstrapping-keyinfra-03#s=
ection-3

at about:
      |            TLS via the Circuit Proxy    |
      |<--Registrar TLS server authentication---|
      |                                         |
  [PROVISIONAL accept of server cert]           |
      P                                         |
      P---IEEE 802.1AR client authentication--->|
      P                                         |

[then doing REST stuff to get out of P state]

We discussed at length: Is this optimization worth pursuing NOW or can it be
                        handled as a true optimization in later work?

                        ** delaying this incurs technical debt **

It might involve the REST interface being flipped. This makes re-use of
existing libraries harder.

This netconf draft addresses how the interface might be implmented:
https://tools.ietf.org/html/draft-ietf-netconf-system-keychain-00
(thus DRAFT vs EST RFC7030)

Our path to RFC is quicker/easier if we reference RFCs.
But this role reversal isn't a bad idea at all!!!

But from this it appears that the =E2=80=9Cserver=E2=80=9D is consistently =
the device. See also:

https://tools.ietf.org/html/rfc6241 (netconf)
  =E2=80=9Cthe client can be a script or
   application typically running as part of a network manager.  The
   server is typically a network device.  The terms "device" and
   "server" are used interchangeably in this document=E2=80=9D


QUESTION: in all of netconf/restconf is the device always passive?

ACTION ITEM FOR MAX: Continue this conversastion with a more detailed
       discussion of what the netconf provisional state actually is (they
       don't spell it out).

Tentative plan: maintain current flows and work toward optimization in
          netconf by partnering with netconf folks?

5) We discussed:

  https://tools.ietf.org/html/draft-ietf-netconf-system-keychain-00 could
      replace [suppliment]  EST, but needs some extensions for ANIMA.

      (It can't replace because the server isn't long term appropriate for
       knowing when the client needs to obtain a new cert etc. I think its
       suppliment).

  This is contrasted to netconf, where the management infrastructure is
  driving the state machine.  So the mgmt drives to push the initial
  certificate.

  But, certificates have lifetimes, and (unless they are ~infinite~), the
  client knows when it needs to renew the certificate, and so it still has =
to
  have a state machine to enable to renew.

  Renew is built-in to EST, but system-keychain doesn't deal with it?
  Kent: client can send notification, but agrees that client has to initiate
          the callback, so that the NMS can push a new certificate down.


A lot of the discussion then revolved around if we could reduce the
time/complexity of the provisional state, as it is a likely avenue of attack
or implementation flaws.

   - flipping the TLS connection and having a TLS extension for the auth
   token / ownership voucher this would require a new doc for a TLS extensi=
on.




                +--------------+
                |   Start      |
                |              |
                +------+-------+
                       |
                +------v-------+
                |  Discover    |
   +------------>              |
   |            +------+-------+
   |                   |
   |            +------v-------+
   |            |  Identity    |
   ^------------+              |
   | rejected   +------+-------+
   |                   |           <-- 1. moving imprint to here as part of
   |                   |                   TLS handshake this reduces the
   |                   |                   provisional state.
   |            +------v-------+    This is an interesting/great/cool
   |            |              |    optimization but would slow us down a l=
ot
   |            |              |     to define the needed extension auth to=
ken.
   |            | Request      |
   |            | Join         |
   |            +------+-------+
   |                   |
   |            +------v-------+
   |            |  Imprint     |   Optional
   ^------------+              <--+Manual input
   | Bad Vendor +------+-------+
   | response          |
   |            +------v-------+
   |            |  Enroll      | <-- 2. should this be driven by the
   |            |              |     registrar/netconf style server
   ^------------+              |     as server side state
   |            |              |     (e.g. netconf-system-keychain)
   | Enroll     +------+-------+     this is implied because the order of
   |                   |             the TLS in netconf call home
   | Failure           |             but we could swap the roles again
   |                   |             to get back to EST (current anima draf=
t)
   |            +------v-------+
   |            |  Being       |
   ^------------+  Managed     |
    Factory     +--------------+
    reset

We discussed the question as to whether or not a decision about 1,
and 2 were linked in any way?  Does TRUE(1) force TRUE(2)? (NO)
Does FALSE(2) imply FALSE(1)?  (NO)

ACTION ITEM for MCR: Can we use RFC5878 (SAML) to replace ownership / auth
                     token extension need?


Here is a TLS State diagram adapted from RFC5878, section 6, anotated
to include where the provision state would be.



Client                                                   Server

    ClientHello (no extensions) -------->                            |0
                                        ServerHello (no extensions)  |0
                                                       Certificate*  |0
                                                 ServerKeyExchange*  |0
                                                CertificateRequest*  |0
                                <--------           ServerHelloDone  |0
    Certificate*                                                     |0
    ClientKeyExchange                                                |0
    CertificateVerify*                                               |0
    [ChangeCipherSpec]                                               |0
    Finished                    -------->                            |1
                                                 [ChangeCipherSpec]  |0
                                <--------                  Finished  |1

                  { THIS IS PROVISIONAL STATE!!!! }

    ClientHello (w/ extensions) -------->                            |1
                                        ServerHello (w/ extensions)  |1
                                  SupplementalData (w/ authz data)*  |1
                                                       Certificate*  |1
                                                 ServerKeyExchange*  |1
                                                CertificateRequest*  |1
                                <--------           ServerHelloDone  |1
    SupplementalData (w/ authz data)*                                |1
    Certificate*                                                     |1
    ClientKeyExchange                                                |1
    CertificateVerify*                                               |1
    [ChangeCipherSpec]                                               |1
    Finished                    -------->                            |2
                                                 [ChangeCipherSpec]  |1
                                <--------                  Finished  |2


SAML would work well, if a bit verbose, but this will fail for
bearer tokens!!!
https://www.oasis-open.org/committees/download.php/35711/sstc-saml-core-err=
ata-2.0-wd-06-diff.pdf
JWT might be simpler.

    PLEDGE                                                REGISTRAR
                                <--MITM-- ClientHello (w/ extensions)

    ServerHello (no extensions) ---MITM->
    Certificate (IDevID)
    ServerKeyExchange* (DH)
    CertificateRequest
    ServerHelloDone
                                <X-MITM--  SupplementalData (w/ authz data)*
                                               Certificate*
                                               ClientKeyExchange
                                               CertificateVerify*
                                               Finished

                                <---MITM   ClientHello
                                           ....


    Finished                    ---MITM->
                           <CRYPTO STARTS HERE>





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




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To: anima-bootstrap <anima-bootstrap@ietf.org>, Kent Watsen <kwatsen@juniper.net>, netconf@ietf.org
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Subject: [Anima-bootstrap] comments on draft-kwatsen-netconf-ownership-voucher
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Kent, I read the quick document you crafted yesterday.  I think it captures
most of what matters, thank you!

   module: ietf-ownership-voucher
         +--rw voucher
         +--rw assertion          enumeration
         +--rw owner-id           string
         +--rw unique-id*         string
         +--rw created-on         yang:date-and-time
         +--rw expires-on?        yang:date-and-time
         +--rw nonce?             string
         +--rw additional-data?

I think that additional-data is probably undesireable.
I think that we need to say that owner-id is actually a hash of public key.
I don't think we can let it be a DN, as that implies some of connection to
some PKI to verify it, and the only point is that we don't have anything
that the vendor didn't burn in.

I would appreciate an example mapped out in JSON.
Could it really be a JWT?  Do we already have such a mapping elsewhere?
Is there any reason we couldn't use the JWT/rfc7519 notation, so that the
mapping just works out?  Maybe I'm missing the value of the YANG here.

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




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> I) The ANIMA cast list is as follows:
>     i) pledge is TCP-initiator, TLS-client, HTTP/EST client.
>    ii) registar is TCP-responder, TLS-server, EST server.

Where's the proxy in that? And didn't we say we'd also have a COAP option?

(That was my understanding in Berlin; hence the Python models that
I sent yesterday.)

   Brian


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From: Brian E Carpenter <brian.e.carpenter@gmail.com>
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Subject: Re: [Anima-bootstrap] comments on draft-kwatsen-netconf-ownership-voucher
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On 15/09/2016 12:31, Michael Richardson wrote:
> 
> Kent, I read the quick document you crafted yesterday.  I think it captures
> most of what matters, thank you!
> 
>    module: ietf-ownership-voucher
>          +--rw voucher
>          +--rw assertion          enumeration
>          +--rw owner-id           string
>          +--rw unique-id*         string
>          +--rw created-on         yang:date-and-time
>          +--rw expires-on?        yang:date-and-time
>          +--rw nonce?             string
>          +--rw additional-data?
> 
> I think that additional-data is probably undesireable.
> I think that we need to say that owner-id is actually a hash of public key.
> I don't think we can let it be a DN, as that implies some of connection to
> some PKI to verify it, and the only point is that we don't have anything
> that the vendor didn't burn in.
> 
> I would appreciate an example mapped out in JSON.

How about CBOR diagnostic notation? Won't we want to represent things
in CBOR at least as often as in JSON?

> Could it really be a JWT?  Do we already have such a mapping elsewhere?
> Is there any reason we couldn't use the JWT/rfc7519 notation, so that the
> mapping just works out?  Maybe I'm missing the value of the YANG here.

Generality?

   Brian


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--=-=-=
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Brian E Carpenter <brian.e.carpenter@gmail.com> wrote:
    >> I) The ANIMA cast list is as follows:
    >> i) pledge is TCP-initiator, TLS-client, HTTP/EST client.
    >> ii) registar is TCP-responder, TLS-server, EST server.

    > Where's the proxy in that? And didn't we say we'd also have a COAP option?

The proxy is in between, but doesn't provide functions above layer-3ish.
I ommited it for clarity :-)

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--=-=-=
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Michael Richardson <mcr+ietf@sandelman.ca> wrote:
    > We had some significant discussions about the advantage of the NETCONF
    > "call-home" role reversal, and explained in this time sequence diagram that
    > has the TCP and TLS activities:

...

    > It was noting:  By flipping the TLS connection the handshake works out nicely
    > in our favor: the TLSCertificate payload is the 802.1AR cert and then
    > *after* it is authenticated the client could respond with the ownership
    > voucher cert  assuming the necessary extension could be defined.

having just read more TLS1.3 stuff...

ADDITIONALLY, TLS 1.3 is much more IKEv2 like, in that it does privacy first
              using an optional DH, and the client is expected to guess what
              the server wants, and if it gets it wrong, the server will use
              HelloRetryRequest to tell it what it wants.

So by reversing the things, we remove a bunch of guessing on the part of the
new pledge, and let the Registrar deal with supporting all ciphers/groups
under the sun, with the new pledge being deployed with only the latest useful
things (plus whatever gets defined as SHOULD+).

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I gave myself the homework:
ACTION ITEM for MCR: Can we use RFC5878 (SAML) to replace ownership / auth
                     token extension need?


RFC5878 defines the: Transport Layer Security (TLS) Authorization Extensions
Abstract
   This document specifies authorization extensions to the Transport
   Layer Security (TLS) Handshake Protocol.  Extensions are carried in
   the client and server hello messages to confirm that both parties
   support the desired authorization data types.  Then, if supported by
   both the client and the server, authorization information, such as
   attribute certificates (ACs) or Security Assertion Markup Language
   (SAML) assertions, is exchanged in the supplemental data handshake
   message.

As it says, in this document we methods to transfer PKIX ACs, and SAML
assertions are defined. In other documents:
   RFC 6042 Transport Layer Security (TLS) Authorization Using KeyNote
   RFC 7562 Transport Layer Security (TLS) Authorization Using Digital
            Transmission Content Protection (DTCP) Certificates
   RFC 6406 Session PEERing for Multimedia INTerconnect (SPEERMINT) Architecture
            (but, I can't figure out why it is referenced)

(as well as TLS1.3 and an IANA update document)

My opinion is that we don't want to go the direction of ASN.1 based ACs.
I looked over SAML again, and I think that more XML is also not something
we want.
   If you looking for SAML docs:
   https://www.oasis-open.org/committees/download.php/35711/sstc-saml-core-errata-2.0-wd-06-diff.pdf


Keynote can do what we want, but it will require a unique parser for this
RFC822-like format.  That may well be reuseable code on some platforms
though. (Given SIP, HTTP, etc. also use that format).  It is already defined,
and I think has some deployment (still checking though)

JSON Web Tokens do very much what we want.  Writing a draft to say how to put
them into a TLS Authorization Extension would be pretty short, 6042 is very
short and simple.  The IANA registry is "Specification Required", and JWT
is quite active, so I think it would be quick.
(I have BCC'ed Mike Jones, but I don't think he needs replies too)

In addition, we would need to define a claim for JWT to say "ownership", it
would look something like:

{ "iss": "http://manufacturer.example.com/",
  "sub": "http://network.operator.example.net/",  <- really HASH
  "aud": "device:12345678",      <- device specific
   "owned_by":true               <- something we'd have to register.
}

which then gets base64 encoded and signed according to the JSON Web Signature.
It could alternatively be encrypted for privacy.

======= HOWEVER.

RFC5878's Security Consideration section notes two issues with this
extension, which is that the ownership voucher would be passed in the clear.
For signed objects which mention the network which will own the device, this
is a privacy problem only.  For bearer tokens, this is a big problem as it
would disclose the bearer token to third parties.

5878 suggests doing an initial TLS handshake, relying upon the privacy
provide, and then rekeying with the extensions.  If both ends needed
authorization extensions to function, then the first TLS handshake would be
trivially man-in-the-middle attacked.  Fortunately in our case,  regardless
of whether which direction initiates, the pledge can be authenticated to
the registrar using the Manufacturer Installed Certificate.   Here is a state
diagram from 5878, annotated a bit.
0 - no confidentiality.
1 - confidentiality+authentication by pledge certificate only.
2 - full authentication.

I added in the middle, essentially, we have the exact same provisional state
that we had before!!! Except that it's a potentially buried in the TLS state
machine, rather than in the application state machine, and again, this only
matters if we want to support bearar tokens.

I think that bearer tokens are useful.
They would be things obtained from a QR code on the side of package for
instance.   Putting an ownership token is not the only way to use that,
it could also just be PSK.

I've looked through TLS1.3, and while the extension would be encrypted
in 1.3, it would be sent by the peer prior to that peer verifying
the Finished message which authenticates that peer.    We could send
the extension afterwards, but then we still wind up with a "provisional"
state of some kind.  Again, possibly it will all be down in the TLS
state machine.



Client                                                   Server

    ClientHello (no extensions) -------->                            |0
                                        ServerHello (no extensions)  |0
                                                       Certificate*  |0
                                                 ServerKeyExchange*  |0
                                                CertificateRequest*  |0
                                <--------           ServerHelloDone  |0
    Certificate*                                                     |0
    ClientKeyExchange                                                |0
    CertificateVerify*                                               |0
    [ChangeCipherSpec]                                               |0
    Finished                    -------->                            |1
                                                 [ChangeCipherSpec]  |0
                                <--------                  Finished  |1

                  { THIS IS PROVISIONAL STATE!!!! }

    ClientHello (w/ extensions) -------->                            |1
                                        ServerHello (w/ extensions)  |1
                                  SupplementalData (w/ authz data)*  |1
                                                       Certificate*  |1
                                                 ServerKeyExchange*  |1
                                                CertificateRequest*  |1
                                <--------           ServerHelloDone  |1
    SupplementalData (w/ authz data)*                                |1
    Certificate*                                                     |1
    ClientKeyExchange                                                |1
    CertificateVerify*                                               |1
    [ChangeCipherSpec]                                               |1
    Finished                    -------->                            |2
                                                 [ChangeCipherSpec]  |1
                                <--------                  Finished  |2


Here is some thinking about flipped, with a MITM marked for TLS 1.2.


    PLEDGE                                                REGISTRAR
                                <--MITM-- ClientHello (w/ extensions)

    ServerHello (no extensions) ---MITM->
    Certificate (IDevID)
    ServerKeyExchange* (DH)
    CertificateRequest
    ServerHelloDone
                                <X-MITM--  SupplementalData (w/ authz data)*
                                               Certificate*
                                               ClientKeyExchange
                                               CertificateVerify*
                                               Finished

                                <---MITM   ClientHello
                                           ....


    Finished                    ---MITM->
                           <CRYPTO STARTS HERE>





--
]               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    [


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




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To: Michael Richardson <mcr+ietf@sandelman.ca>
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On 15/09/2016 13:25, Michael Richardson wrote:
> 
> Brian E Carpenter <brian.e.carpenter@gmail.com> wrote:
>     >> I) The ANIMA cast list is as follows:
>     >> i) pledge is TCP-initiator, TLS-client, HTTP/EST client.
>     >> ii) registar is TCP-responder, TLS-server, EST server.
> 
>     > Where's the proxy in that? And didn't we say we'd also have a COAP option?
> 
> The proxy is in between, but doesn't provide functions above layer-3ish.
> I ommited it for clarity :-)

OK. But layer 4 probably - it seems likely that we would terminate a TLS
session at the proxy and make another one between the proxy and the
registrar. (That's the bit I *didn't* model in my Python demos.)

    Brian


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Brian E Carpenter <brian.e.carpenter@gmail.com> wrote:
    >> Brian E Carpenter <brian.e.carpenter@gmail.com> wrote:
    >> >> I) The ANIMA cast list is as follows:
    >> >> i) pledge is TCP-initiator, TLS-client, HTTP/EST client.
    >> >> ii) registar is TCP-responder, TLS-server, EST server.
    >>
    >> > Where's the proxy in that? And didn't we say we'd also have a COAP option?
    >>
    >> The proxy is in between, but doesn't provide functions above layer-3ish.
    >> I ommited it for clarity :-)

    > OK. But layer 4 probably - it seems likely that we would terminate a TLS
    > session at the proxy and make another one between the proxy and the
    > registrar. (That's the bit I *didn't* model in my Python demos.)

No, we don't want to do that for a number of reasons:

In no particular order:

1) The proxy isn't trusted, and doesn't know how to trust the pledge.

   While it has a local domain certificate, it has no knowledge about the
   Manufacturer Installed Certificate (the IDevID) that the pledge provides.

   The pledge has no way to trust the proxy: this is what the ownership
   voucher is for (and causes us some challenge to get right), and I don't
   think we want to extend the trust conveyed by the ownership voucher to the
   network operator, transitively, to all of the operators' machines.

2) The proxy may not have resources to terminate a possibly large number of TLS
   connections.  We want to make being a proxy as inexpensive as possible,
   particularly given that this function (along with the rest of the ACP
   processing) likely resides on a control plane CPU.




--
Michael Richardson <mcr+IETF@sandelman.ca>, Sandelman Software Works
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To: Michael Richardson <mcr+ietf@sandelman.ca>
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From: Brian E Carpenter <brian.e.carpenter@gmail.com>
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Date: Fri, 16 Sep 2016 08:13:10 +1200
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Subject: Re: [Anima-bootstrap] DRAFT minutes up to 2016-09-13
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On 16/09/2016 00:49, Michael Richardson wrote:
> 
> Brian E Carpenter <brian.e.carpenter@gmail.com> wrote:
>     >> Brian E Carpenter <brian.e.carpenter@gmail.com> wrote:
>     >> >> I) The ANIMA cast list is as follows:
>     >> >> i) pledge is TCP-initiator, TLS-client, HTTP/EST client.
>     >> >> ii) registar is TCP-responder, TLS-server, EST server.
>     >>
>     >> > Where's the proxy in that? And didn't we say we'd also have a COAP option?
>     >>
>     >> The proxy is in between, but doesn't provide functions above layer-3ish.
>     >> I ommited it for clarity :-)
> 
>     > OK. But layer 4 probably - it seems likely that we would terminate a TLS
>     > session at the proxy and make another one between the proxy and the
>     > registrar. (That's the bit I *didn't* model in my Python demos.)
> 
> No, we don't want to do that for a number of reasons:

So, accepting those reasons, if (for example) we do the first
suggestion in draft-richardson-anima-state-for-joinrouter-01:

"3.1.  method 1: Circuit Proxy method

   In response to discovery, the circuit proxy would return a link-local
   address on the joining router.  The joining router would have a TCP
   (or UDP/CoAP) port open on that interface.  It would accept
   connections on that port, and would turn around and create a new TCP
   connection to the registrar."

Can TLS just ride over such a relayed TCP connection?

And so on for the other models in anima-state-for-joinrouter. I do
think this needs to be resolved before we can say the model is complete.

  Brian

> 
> In no particular order:
> 
> 1) The proxy isn't trusted, and doesn't know how to trust the pledge.
> 
>    While it has a local domain certificate, it has no knowledge about the
>    Manufacturer Installed Certificate (the IDevID) that the pledge provides.
> 
>    The pledge has no way to trust the proxy: this is what the ownership
>    voucher is for (and causes us some challenge to get right), and I don't
>    think we want to extend the trust conveyed by the ownership voucher to the
>    network operator, transitively, to all of the operators' machines.
> 
> 2) The proxy may not have resources to terminate a possibly large number of TLS
>    connections.  We want to make being a proxy as inexpensive as possible,
>    particularly given that this function (along with the rest of the ACP
>    processing) likely resides on a control plane CPU.
> 
> 
> 
> 
> --
> Michael Richardson <mcr+IETF@sandelman.ca>, Sandelman Software Works
>  -= IPv6 IoT consulting =-
> 
> 
> 


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Subject: Re: [Anima-bootstrap] DRAFT minutes up to 2016-09-13
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--=-=-=
Content-Type: text/plain


Brian E Carpenter <brian.e.carpenter@gmail.com> wrote:
    >> Brian E Carpenter <brian.e.carpenter@gmail.com> wrote:
    >> >> Brian E Carpenter <brian.e.carpenter@gmail.com> wrote:
    >> >> >> I) The ANIMA cast list is as follows:
    >> >> >> i) pledge is TCP-initiator, TLS-client, HTTP/EST client.
    >> >> >> ii) registar is TCP-responder, TLS-server, EST server.
    >> >>
    >> >> > Where's the proxy in that? And didn't we say we'd also have a COAP option?
    >> >>
    >> >> The proxy is in between, but doesn't provide functions above layer-3ish.
    >> >> I ommited it for clarity :-)
    >>
    >> > OK. But layer 4 probably - it seems likely that we would terminate a TLS
    >> > session at the proxy and make another one between the proxy and the
    >> > registrar. (That's the bit I *didn't* model in my Python demos.)
    >>
    >> No, we don't want to do that for a number of reasons:

    > So, accepting those reasons, if (for example) we do the first
    > suggestion in draft-richardson-anima-state-for-joinrouter-01:

    > "3.1.  method 1: Circuit Proxy method

    > In response to discovery, the circuit proxy would return a link-local
    > address on the joining router.  The joining router would have a TCP
    > (or UDP/CoAP) port open on that interface.  It would accept
    > connections on that port, and would turn around and create a new TCP
    > connection to the registrar."

    > Can TLS just ride over such a relayed TCP connection?

Yes, the circuit proxy plugs two layer-4s together.
TLS is a "layer-5" here. It just goes through, unexamined, by the proxy.

    > And so on for the other models in anima-state-for-joinrouter. I do
    > think this needs to be resolved before we can say the model is complete.

    > Brian


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




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From: "Max Pritikin (pritikin)" <pritikin@cisco.com>
To: "mcr+ietf@sandelman.ca" <mcr+ietf@sandelman.ca>, "leo.liubing@huawei.com" <leo.liubing@huawei.com>, "brian.e.carpenter@gmail.com" <brian.e.carpenter@gmail.com>, "Jason Coleman (colemaj)" <colemaj@cisco.com>, "Michael Behringer (mbehring)" <mbehring@cisco.com>, "anima-bootstrap@ietf.org" <anima-bootstrap@ietf.org>, "alper.yegin@yegin.org" <alper.yegin@yegin.org>, "tte+anima@cs.fau.de" <tte+anima@cs.fau.de>, "ietf@sandeep.de" <ietf@sandeep.de>, "jiangsheng@huawei.com" <jiangsheng@huawei.com>, "kwatsen@juniper.net" <kwatsen@juniper.net>
Thread-Topic: UPDATE: Weekly anima-bootstrap meeting
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This replaces the ongoing bootstrap design team standing meeting. It should=
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minates at the Seoul meeting (at which point we can reschedule).


Etherpad:
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(note typo in boostrapping)


=97=97=97






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From: "Max Pritikin (pritikin)" <pritikin@cisco.com>
To: "Jason Coleman (colemaj)" <colemaj@cisco.com>, "Michael Behringer (mbehring)" <mbehring@cisco.com>, "alper.yegin@yegin.org" <alper.yegin@yegin.org>, "anima-bootstrap@ietf.org" <anima-bootstrap@ietf.org>, "brian.e.carpenter@gmail.com" <brian.e.carpenter@gmail.com>, "ietf@sandeep.de" <ietf@sandeep.de>, "jiangsheng@huawei.com" <jiangsheng@huawei.com>, "kwatsen@juniper.net" <kwatsen@juniper.net>, "leo.liubing@huawei.com" <leo.liubing@huawei.com>, "mcr+ietf@sandelman.ca" <mcr+ietf@sandelman.ca>, "tte+anima@cs.fau.de" <tte+anima@cs.fau.de>
Thread-Topic: UPDATE: Weekly anima-bootstrap meeting
Thread-Index: AQHSE2unJ9m3P+oi90m5VsfpDYKSrA==
Date: Tue, 20 Sep 2016 18:20:23 +0000
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Subject: [Anima-bootstrap] UPDATE: Weekly anima-bootstrap meeting
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Cc: "tte+anima@cs.fau.de" <tte+anima@cs.fau.de>, "ietf@sandeep.de" <ietf@sandeep.de>, "alper.yegin@yegin.org" <alper.yegin@yegin.org>, "Michael Behringer \(mbehring\)" <mbehring@cisco.com>, "anima-bootstrap@ietf.org" <anima-bootstrap@ietf.org>, "leo.liubing@huawei.com" <leo.liubing@huawei.com>, "kwatsen@juniper.net" <kwatsen@juniper.net>, "Jason Coleman \(colemaj\)" <colemaj@cisco.com>, "jiangsheng@huawei.com" <jiangsheng@huawei.com>
Subject: Re: [Anima-bootstrap] UPDATE: Weekly anima-bootstrap meeting
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Kent and I couldn't use the new webex as it takes a CEC login to start it.
No place to enter the host key. After some typing at each other, we decided
to cancel.

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




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To: Michael Richardson <mcr+ietf@sandelman.ca>
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Subject: Re: [Anima-bootstrap] Brian: Text to discover "Registrars" via GRASP
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On 23/09/2016 12:12, Michael Richardson wrote:
> 
> {why isn't this on the list???}

Assuming you mean the bootstrap DT list, only because it started as a
very specific discussion point. So now it's on the list.

> 
> Brian E Carpenter <brian.e.carpenter@gmail.com> wrote:
>     > On 13/09/2016 12:52, Toerless Eckert wrote:
>     >> On Tue, Sep 13, 2016 at 11:12:20AM +1200, Brian E Carpenter wrote:
>>>>>> Currently we have:
>>>>>>       BRSKY via TLS/TCP
>>>>>>       BRSKY via CoAP/dTLS/UDP via IPIP
>     >>
>     >> I am actually confused right now why i added the "IPIP" into the mix...
>     >> *head* *scratching*
> 
>     > Yes, if you're inside the ACP it certainly seems redundant.
> 
> Either there are TCP/UDP circuit layer proxies (aka NAT66s or application
> layer alg-gateways), or there is an IPIP layer. In the later case, the
> packets look like:
> 
> pledge                     proxy                      registrar
> A ----- src:llA/dst:llP---->   ---src:acpP/dst:acpR------> R
>                                  IPIP:src:llA/dst:llP
> 
> We need the IPIP layer on the ACP side because the pledge/proxy
> communication is link-local only.

Sure. And I think we do need to settle the question of which method
is used. What is the advantage in the registrar seeing the link-local
addresses, which are never supposed to be visible off-link? Would
it help for diagnostics? If we want that, we want IPIP. If not, NAT66
would need to clamber over innumerable dead bodies). So then a transport
proxy seems best (to preserve end2end TLS).

> If the CoAP and TCP versions are different ASAs, then they can return
> different addresses and port numbers.
> If they are on the same ASA, I guess, yes, we need to return to answers.

Right. I assumed the second case for my demo code because it's more
demanding on GRASP.

   Brian


From nobody Mon Sep 26 14:54:47 2016
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Date: Mon, 26 Sep 2016 23:54:31 +0200
From: Toerless Eckert <tte+ietf@cs.fau.de>
To: "Max Pritikin (pritikin)" <pritikin@cisco.com>, anima-bootstrap@ietf.org
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Subject: [Anima-bootstrap] anima-bootstrap: Working conference/webex ?
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Do we have a working webex/conference tool setup for tomorrow and
the coming tuesdays ? Last week, it was Max'ex Cisco  webex and
no one could dial.

I can ask for an IETF webex account to set up a new IETF webex, biut i
think for tomorrow, that would be too late.

Suggestions ?

Cheers
    Toerless


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From nobody Tue Sep 27 07:05:29 2016
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The cisco webex from Max is not working / started ... ?
Do we have a meeting ?

Cheers
    Toerless


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--=-=-=
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here are the ietf.webex.com for the next few weeks (until Nov. 8, but I think
we might want to cancel the week before IETF).
I'll repeat this in the minutes, and I updated the ics invite that likely
has beaten this email.

https://ietf.webex.com/ietf/j.php?MTID=m0e0d148dad8af4468112c83bbb3181bc

http://etherpad.tools.ietf.org:9000/p/anima-boostrapping?useMonospaceFont=true

648 921 326
Meeting password: boostrap

Audio connection:
1-877-668-4493 Call-in toll free number (US/Canada)
1-650-479-3208 Call-in toll number (US/Canada)
Show toll-free dialing restrictions
Access code: 648 921 326



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




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From nobody Tue Sep 27 14:57:52 2016
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Subject: Re: [Anima-bootstrap] anima-bootstrap: Working conference/webex ?
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Also, I want to point out that the meeting is anchored at 1500UTC,
which means that Nov. 1, it moves an hour as we change our clocks.

Alas, in my google calendar, I have yet to find a way to actually pick UTC as
a timezone (hints welcome), so in mine, it's anchored to Amsterdam/France,
which makes it even more confusing.

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




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From nobody Tue Sep 27 15:40:41 2016
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> Alas, in my google calendar, I have yet to find a way to actually pick UTC as
> a timezone (hints welcome), so in mine, it's anchored to Amsterdam/France,
> which makes it even more confusing.

Reykjavik.

Grüße, Carsten

