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Re: [Ecrit] draft-ietf-ecrit-psap-callback

Hannes Tschofenig <hannes.tschofenig@gmx.net> Mon, 08 November 2010 00:34 UTC

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From: Hannes Tschofenig <hannes.tschofenig@gmx.net>
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Date: Mon, 08 Nov 2010 01:35:03 +0100
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To: Cullen Jennings <fluffy@cisco.com>
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Cc: Hannes Tschofenig <hannes.tschofenig@gmx.net>, ECRIT <ecrit@ietf.org>
Subject: Re: [Ecrit] draft-ietf-ecrit-psap-callback
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Hi Cullen, 

sorry if the draft did not make the approach clear. 

It decouples three elements: 

a) marking 
b) authentication and identity handling 
c) authorization

For (a) a scheme is described in the document. There is a bug in there but I will fix it with a draft update today. 

For (b) we suggest to re-use PAI and SIP Identity

For (c) the draft discusses two possible approaches, namely to use the authenticated identity for authorization or a trait. On the latter aspect, the draft does not define a solution using SIP SAML at the moment. 

Ciao
Hannes


On Nov 7, 2010, at 11:51 PM, Cullen Jennings wrote:

> 
> The part of this problem I find particularly interesting about call back is the authorization. I can't tell if this draft is proposing PAI, Identity, SAML Traits, or Tokens. I don't really see how any of them work but it seems like this should be a big topic of discussion if this draft is going to make any progress. 
> 
> 
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