Re: [TLS] [sasl] lasgt call comments (st Call: draft-altman-tls-channel-bindings (Channel Bindings for TLS) to Proposed Standard)
Nicolas Williams <Nicolas.Williams@sun.com> Wed, 28 October 2009 21:32 UTC
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Date: Wed, 28 Oct 2009 16:21:17 -0500
From: Nicolas Williams <Nicolas.Williams@sun.com>
To: Larry Zhu <larry.zhu@microsoft.com>
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Subject: Re: [TLS] [sasl] lasgt call comments (st Call: draft-altman-tls-channel-bindings (Channel Bindings for TLS) to Proposed Standard)
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On Wed, Oct 28, 2009 at 08:59:53PM +0000, Larry Zhu wrote: > How about > > The client's TLS Finished message (note: the Finished > struct) in the clear text form from the first handshake of > the TLS session as identified by the > session ID in the server > hello message, as defined in 7.4.1.3 of RFC5246, > of the last handshake in the current active TLS session. > > > Can we label this as "tls-session-unique"? The existing deployment > seems to have a different interpretation but we do not have a real > usage case for that. It does not hurt to create another label just to > avoid potential interoperability issues. > > This seems to be the most intuitive definition and we do not have any > ambiguity here. Larry and I just spoke on the phone. The real issue is the word "connection". Apparently RFC5246 uses it in two senses, one of them being the-transport-layer-above-IP (i.e., TCP for TLS and UDP for DTLS, typically), and that is confusing. I explained to Larry that using "session" instead, as in his proposed text above is nearly impossible to implement, because it means updating session resumption state caches -- a very intrusive change to existing TLS implementations. What Larry really wants is to find a way to refer to what Microsoft's SSPI-based implementation of TLS calls a "security context". Advice on what would be the best TLS-specific term for "security context" is welcome. Nico --
- [TLS] Last Call: draft-altman-tls-channel-binding… The IESG
- Re: [TLS] lasgt call comments (st Call: draft-alt… Larry Zhu
- Re: [TLS] [sasl] lasgt call comments (st Call: dr… Pasi.Eronen
- Re: [TLS] lasgt call comments (st Call: draft-alt… Simon Josefsson
- Re: [TLS] lasgt call comments (st Call: draft-alt… Simon Josefsson
- Re: [TLS] [sasl] lasgt call comments (st Call: dr… Nicolas Williams
- Re: [TLS] [sasl] lasgt call comments (st Call: dr… Nicolas Williams
- Re: [TLS] [sasl] lasgt call comments (st Call: Martin Rex
- Re: [TLS] [sasl] lasgt call comments (st Call: dr… Larry Zhu
- Re: [TLS] [sasl] lasgt call comments (st Call: Nicolas Williams
- Re: [TLS] [sasl] lasgt call comments (st Call: dr… Larry Zhu
- Re: [TLS] [sasl] lasgt call comments (st Call: dr… Nicolas Williams
- [TLS] RESOLVED (Re: [sasl] lasgt call comments (s… Nicolas Williams
- Re: [TLS] RESOLVED (Re: [sasl] lasgt call comment… Martin Rex
- Re: [TLS] RESOLVED (Re: [sasl] lasgt call comment… Simon Josefsson
- Re: [TLS] RESOLVED (Re: [sasl] lasgt call comment… Martin Rex
- Re: [TLS] RESOLVED (Re: [sasl] lasgt call comment… Martin Rex
- Re: [TLS] RESOLVED (Re: [sasl] lasgt call comment… Peter Gutmann
- Re: [TLS] RESOLVED (Re: [sasl] lasgt call comment… Martin Rex
- Re: [TLS] RESOLVED (Re: [sasl] lasgt call comment… Nicolas Williams
- Re: [TLS] [CHANNEL-BINDING] RESOLVED (Re: [sasl] … Nicolas Williams
- [TLS] Unrelated (Re: [CHANNEL-BINDING] RESOLVED (… Nicolas Williams
- Re: [TLS] [CHANNEL-BINDING] RESOLVED (Re: [sasl] … Nicolas Williams
- Re: [TLS] Unrelated (Re: [CHANNEL-BINDING] RESOLV… Martin Rex
- Re: [TLS] [CHANNEL-BINDING] Unrelated (Re: RESOLV… Nicolas Williams
- Re: [TLS] RESOLVED (Re: [sasl] lasgt call comment… Martin Rex
- Re: [TLS] [CHANNEL-BINDING] RESOLVED (Re: [sasl] … Martin Rex
- Re: [TLS] RESOLVED (Re: [sasl] lasgt call comment… Pasi.Eronen
- Re: [TLS] RESOLVED (Re: [sasl] lasgt call comment… Pasi.Eronen
- Re: [TLS] lasgt call comments (st Call: draft-alt… Pasi.Eronen
- Re: [TLS] lasgt call comments (st Call: draft-alt… Simon Josefsson
- Re: [TLS] RESOLVED (Re: [sasl] lasgt call comment… Nicolas Williams
- Re: [TLS] [sasl] lasgt call comments (st Call: dr… Nicolas Williams
- Re: [TLS] RESOLVED (Re: [sasl] lasgt call comment… Michael D'Errico
- Re: [TLS] [sasl] lasgt call comments (st Call: dr… Nicolas Williams
- Re: [TLS] [CHANNEL-BINDING] RESOLVED (Re: [sasl] … Nicolas Williams
- Re: [TLS] RESOLVED (Re: [sasl] lasgt call comment… Nicolas Williams
- Re: [TLS] [CHANNEL-BINDING] RESOLVED (Re: [sasl] … Jeffrey Hutzelman
- Re: [TLS] [CHANNEL-BINDING] RESOLVED (Re: [sasl] … Sam Hartman
- Re: [TLS] [CHANNEL-BINDING] RESOLVED (Re: [sasl] … Nicolas Williams
- Re: [TLS] lasgt call comments (st Call: draft-alt… Simon Josefsson
- Re: [TLS] lasgt call comments (st Call: draft-alt… Nicolas Williams
- Re: [TLS] RESOLVED (Re: [sasl] lasgt call comment… Larry Zhu
- [TLS] New Problem (Was: Last Call: draft-altman-t… Nicolas Williams
- Re: [TLS] New Problem (Was: Last Call: draft-altm… Larry Zhu
- Re: [TLS] [CHANNEL-BINDING] New Problem (Was: Las… Nicolas Williams