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Re: [TLS] Last Call: <draft-ietf-tls-ssl2-must-not-03.txt> (Prohibiting SSL Version 2.0) to Proposed Standard

"Glen Zorn" <gwz@net-zen.net> Thu, 02 December 2010 14:00 UTC

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From: Glen Zorn <gwz@net-zen.net>
To: 'Michael D'Errico' <mike-list@pobox.com>
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Date: Thu, 02 Dec 2010 21:01:23 +0700
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Subject: Re: [TLS] Last Call: <draft-ietf-tls-ssl2-must-not-03.txt> (Prohibiting SSL Version 2.0) to Proposed Standard
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Michael D'Errico [mailto:mike-list@pobox.com] writes:

> Glen Zorn wrote:
> > Section 3 says "TLS clients MUST NOT send SSL 2.0 CLIENT-HELLO
> messages."
> > and "TLS servers MUST NOT negotiate or use SSL 2.0" and later "TLS
> servers
> > that do not support SSL 2.0 MAY accept version 2.0 CLIENT-HELLO
> messages as
> > the first message of a TLS handshake for interoperability with old
> clients."
> > Taken together, I find these statements quite confusing, if not
> outright
> > self-contradictory.  Maybe, a "However" might fix the problem, though:
> >
> > 	TLS servers MUST NOT negotiate or use SSL 2.0; however, TLS
> servers
> > 	MAY accept SSL 2.0 CLIENT-HELLO messages as the first message of a
> > 	TLS handshake in order to maintain interoperability with legacy
> > 	clients.
> 
> Glen,
> 
> There is no contradiction among the statements, but they may be
> confusing (I
> can't tell anymore since I've gone through the drafts several times).

Maybe I just don't understand the word "use".  It seems like if a server
accepts a protocol message it's using the protocol...

...

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