Re: [apps-discuss] [kitten] [saag] HTTP authentication: the next generation

To quote from Abfab's charter:

                 This working group will specify a federated identity
  mechanism for use by other Internet protocols not based on HTML/HTTP, 

For just adding authentication to HTTP, I don't think it makes sense to add federation. All kinds of services such as web mail, online gaming, and online shopping require authentication, but there's no federation involved. 

-----Original Message-----
From: Josh Howlett [mailto:Josh.Howlett@ja.net] 
Sent: 12 December 2010 10:30
To: Yaron Sheffer; Luke Howard
Cc: apps-discuss@ietf.org; pgut001@cs.auckland.ac.nz; Yoav Nir; websec; Paul Hoffman; kitten@ietf.org; http-auth@ietf.org; saag@ietf.org; Hannes Tschofenig; Josh Howlett; ietf-http-wg@w3.org Group
Subject: Re: [kitten] [saag] HTTP authentication: the next generation

AbFab is defining a GSS EAP mechanism that can encapsulate the EAP methods you mention. This mechanism could be run over SASL-TLS using GS2.

Josh.

--- original message ---
From: "Yaron Sheffer" <yaronf.ietf@gmail.com>
Subject: Re: [kitten] [saag] HTTP authentication: the next generation
Date: 12th December 2010
Time: 7:36:41 am

Hi Luke,

I am not a big fan of EAP myself (although I am a co-author on Yoav's TLS-EAP), but no, for pragmatic reasons SASL is not the moral equivalent.

There is a number of EAP methods that provide zero-knowledge password based mutual authentication (i.e. password based auth that's *not* susceptible to dictionary attacks). These include (see
http://www.iana.org/assignments/eap-numbers/eap-numbers.xml#eap-numbers-3)
EAP-SRP-SHA1, EAP-pwd, EAP-EKE and EAP-SPEKE.

As far as I can see
(http://www.iana.org/assignments/sasl-mechanisms/sasl-mechanisms.xhtml)
SASL does not provide any equivalent method.

Thanks,
        Yaron

On 12/12/2010 03:38 AM, Luke Howard wrote:
>
> On 12/12/2010, at 10:10 AM, Yoav Nir wrote:
>
>>
>> On Dec 11, 2010, at 1:09 AM, Paul Hoffman wrote:
>>
>>> At 3:53 PM -0700 12/10/10, Peter Saint-Andre wrote:
>>>> Other than that, I'm not aware of much activity. What have I missed?
>>>
>>> TLS client certificates.
>>
>> TLS client certificates work, but as we've learned both with the web and with IPsec clients, people would much rather not use them. A few IETFs ago (Chicago?), a bunch of us tried to push the idea of TLS with EAP authentication.
>>
>> http://tools.ietf.org/html/draft-nir-tls-eap
>
> Does draft-williams-tls-app-sasl-opt-04.txt + abfab get you the moral equivalent?
>
> -- Luke
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