Subject: RE: iSCSI: DLB's [T.33] 10.5 Challenge Handshake Authentication P rotocol (CHAP)

From: [email-masked]
Date: Mon, 8 Jul 2002 10:05:40 -0400

Rod,

> 	A MUST here seems to preclude the initiator not offering CHAP due to
> administrative configuration. In fact the original SHOULD seems a bit
> strong.
> 
> 	I.e. is ...
> 
> 	AuthMethod=none
> 
> 	no longer to be valid?

No, this text has no effect on AuthMethod, it's about the values of the
CHAP_A key.  The text in question refers only to the CHAP algorithms
to be offered *once CHAP is selected*.  AuthMethod=none would still
be valid, as is skipping the security negotiation stage entirely.  As the
current text says, the only CHAP algorithm for which interoperability can
be assured is MD5.

There's a related problem here in that the encoding of the values of the
CHAP_A key are not specified - the quickest way out of this one would
be to have them be numbers and refer to the IANA registry from which the
numbers MUST be taken.

Thanks,
--David
---------------------------------------------------
David L. Black, Senior Technologist
EMC Corporation, 42 South St., Hopkinton, MA  01748
+1 (508) 249-6449            FAX: +1 (508) 497-8018
[email-masked]       Mobile: +1 (978) 394-7754
---------------------------------------------------