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Re: Updated SASL And Channel Binding document (-03)



On Tue, May 26, 2009 at 09:48:08AM -0700, Kurt Zeilenga wrote:
> Generally and with respect to SCRAM, I rather change the specification  
> to always require the use of unique channel bindings.  I do understand  
> however that some prefer use of end-point channel binding types in  
> certain cases.

Indeed, we'll not agree to always require the use of unique channel
bindings.

> One solution for SCRAM is to offer:
> 	SCRAM-SHA-1
> 	SCRAM-SHA-1-ENDPOINT
> 	SCRAM-SHA-1-UNIQUE

That complicates everything.

> However, as WG Chair, I'm willing to discuss and conclude on this  
> issue (for SCRAM) as part of SCRAM WGLC.

I don't see what difference it makes whether we discuss this in the
context of a WGLC or not.  Either way we need a resolution.

So let's discuss it now.

To solve this without adding yet another negotiation via SASL mechanism
name we could just declare that the negotiation will be done by
SCRAM/GS2, and that the application must furnish channel bindings all
available channel binding types.  That would not precluse YAP, and it
would not complicate SCRAM/GS2.

Nico
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