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Re: [Ace] Offline operation of Resource Server

Rafa Marin Lopez <rafa@um.es> Tue, 15 July 2014 15:36 UTC

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From: Rafa Marin Lopez <rafa@um.es>
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Date: Tue, 15 Jul 2014 17:36:22 +0200
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Subject: Re: [Ace] Offline operation of Resource Server
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Hi Michael:

El 15/07/2014, a las 17:27, Michael Richardson <mcr+ietf@sandelman.ca> escribió:

> 
> Rafa Marin Lopez <rafa@um.es> wrote:
>> That is possible if during the EAP/AAA interactions there is a
>> bootstrapping of some short term credential (e.g. Kerberos
>> tickets). For example, if we talk in Kerberos terminology, the
> 
> Please don't build in any assumption in your thinking that the resulting
> ticket is short term.  Some may wish it; but for many applications we are
> talking about tickets that either never expire, or have expirations times
> decades in the future.

I agree. I was talking about a typical case in Kerberos. But I do not have problem with having long-term credentials bootstrapped. That should be feasible. Nevertheless, please take into account that the bootstrapping phase might be used only once for decades (so the source code developed for it). 

> 
> Josh Howlett <Josh.Howlett@ja.net> wrote:
>>> So, in summary, there could be an online enrollment and online
>>> authorization decision based on EAP/AAA that allows to bootstrap
>>> "something" that enables RS and C to have an offline interaction during a
>>> period of time (e.g. ticket lifetime).
> 
>> Just by way of example, another "something" that could be bootstrapped
>> by EAP/AAA (as an alternative or complement to a Kerberos ticket) could
>> be a certificate. There is also running code demonstrating this.
> 
> Yes; exactly.  The certificate could contain Authorization Attributes rather
> than identities.  Anyone who hasn't read rfc2692 and rfc2693 lately, should
> do so.
> 
> Just think of the kerberos-like symmetric key token as being a certificate
> that can only be validated by the originator.

In fact, we have also considered the case of bootstrapping a certificate after an EAP/AAA authentication. So I have no problem at all with that. So +1 to that.

Best Regards.

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

-------------------------------------------------------
Rafael 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
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