Re: [CHANNEL-BINDING] [TLS] lasgt call comments (st Call: draft-altman-tls-channel-bindings (Channel Bindings for TLS) to Proposed Standard)
Nicolas Williams <Nicolas.Williams@sun.com> Wed, 04 November 2009 20:03 UTC
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Date: Wed, 04 Nov 2009 13:52:08 -0600
From: Nicolas Williams <Nicolas.Williams@sun.com>
To: Simon Josefsson <simon@josefsson.org>
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Cc: channel-binding@ietf.org, tls@ietf.org, sasl@ietf.org
Subject: Re: [CHANNEL-BINDING] [TLS] lasgt call comments (st Call: draft-altman-tls-channel-bindings (Channel Bindings for TLS) to Proposed Standard)
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On Wed, Nov 04, 2009 at 08:26:30PM +0100, Simon Josefsson wrote: > Nicolas Williams <Nicolas.Williams@sun.com> writes: > > [...] > > With that definition, one couldn't use tls-unique channel binding to > bind to the authentication credentials associated with a TLS channel ^^^^^^^^^^^^^^^^^^^^^^^^^^ > uniquely -- a TLS re-negotiation doesn't change the channel binding > data, but it may change the authentication credentials. The point of channel binding is NOT to bind the authentication credentials of the channel's end-points. In fact, the point of channel binding is to allow authentication to happen at a layer above the channel, so that the authentication, or lack thereof in that channel, becomes irrelevant. Please see RFC5056. > I believe that problem needs to be explained in the security > consideration -- it would be easy to think that channel binding data can > be used to get a cryptographic association with the user credentials > used for that channel. There is no problem. > Otherwise I don't see any problem with this definition. Thanks. Nico --
- Re: [CHANNEL-BINDING] RESOLVED (Re: [sasl] lasgt … Nicolas Williams
- [CHANNEL-BINDING] Last Call: draft-altman-tls-cha… The IESG
- Re: [CHANNEL-BINDING] Last Call: draft-altman-tls… Simon Josefsson
- Re: [CHANNEL-BINDING] Last Call: draft-altman-tls… Nicolas Williams
- [CHANNEL-BINDING] Unrelated (Re: [TLS] RESOLVED (… Nicolas Williams
- Re: [CHANNEL-BINDING] [sasl] lasgt call comments … Pasi.Eronen
- Re: [CHANNEL-BINDING] lasgt call comments (st Cal… Simon Josefsson
- Re: [CHANNEL-BINDING] lasgt call comments (st Cal… Simon Josefsson
- Re: [CHANNEL-BINDING] [sasl] lasgt call comments … Nicolas Williams
- [CHANNEL-BINDING] lasgt call comments (st Call: d… Larry Zhu
- Re: [CHANNEL-BINDING] lasgt call comments (st Cal… Larry Zhu
- Re: [CHANNEL-BINDING] [TLS] [sasl] lasgt call com… Nicolas Williams
- Re: [CHANNEL-BINDING] [TLS] [sasl] lasgt call com… Larry Zhu
- Re: [CHANNEL-BINDING] [TLS] [sasl] lasgt call com… Nicolas Williams
- Re: [CHANNEL-BINDING] [TLS] RESOLVED (Re: [sasl] … Nicolas Williams
- Re: [CHANNEL-BINDING] [sasl] lasgt call comments … Larry Zhu
- Re: [CHANNEL-BINDING] [TLS] [sasl] lasgt call com… Nicolas Williams
- Re: [CHANNEL-BINDING] [TLS] [sasl] lasgt call com… Martin Rex
- [CHANNEL-BINDING] RESOLVED (Re: [sasl] lasgt call… Nicolas Williams
- Re: [CHANNEL-BINDING] [TLS] RESOLVED (Re: [sasl] … Martin Rex
- Re: [CHANNEL-BINDING] RESOLVED (Re: [sasl] lasgt … Simon Josefsson
- Re: [CHANNEL-BINDING] RESOLVED (Re: [sasl] lasgt … Martin Rex
- Re: [CHANNEL-BINDING] [TLS] RESOLVED (Re: [sasl] … Martin Rex
- Re: [CHANNEL-BINDING] [TLS] RESOLVED (Re: [sasl] … Martin Rex
- Re: [CHANNEL-BINDING] [TLS] RESOLVED (Re: [sasl] … Peter Gutmann
- Re: [CHANNEL-BINDING] [TLS] RESOLVED (Re: [sasl] … Nicolas Williams
- Re: [CHANNEL-BINDING] Unrelated (Re: [TLS] RESOLV… Martin Rex
- Re: [CHANNEL-BINDING] Unrelated (Re: [TLS] RESOLV… Nicolas Williams
- Re: [CHANNEL-BINDING] [TLS] RESOLVED (Re: [sasl] … Martin Rex
- Re: [CHANNEL-BINDING] [TLS] RESOLVED (Re: [sasl] … Pasi.Eronen
- Re: [CHANNEL-BINDING] [TLS] RESOLVED (Re: [sasl] … Pasi.Eronen
- Re: [CHANNEL-BINDING] [TLS] lasgt call comments (… Pasi.Eronen
- Re: [CHANNEL-BINDING] [TLS] lasgt call comments (… Simon Josefsson
- Re: [CHANNEL-BINDING] [TLS] RESOLVED (Re: [sasl] … Nicolas Williams
- Re: [CHANNEL-BINDING] [sasl] [TLS] lasgt call com… Nicolas Williams
- Re: [CHANNEL-BINDING] [TLS] RESOLVED (Re: [sasl] … Jeffrey Hutzelman
- Re: [CHANNEL-BINDING] [sasl] [TLS] lasgt call com… Nicolas Williams
- Re: [CHANNEL-BINDING] [TLS] RESOLVED (Re: [sasl] … Michael D'Errico
- Re: [CHANNEL-BINDING] [TLS] RESOLVED (Re: [sasl] … Nicolas Williams
- Re: [CHANNEL-BINDING] [TLS] RESOLVED (Re: [sasl] … Sam Hartman
- Re: [CHANNEL-BINDING] [TLS] RESOLVED (Re: [sasl] … Nicolas Williams
- Re: [CHANNEL-BINDING] [TLS] lasgt call comments (… Simon Josefsson
- Re: [CHANNEL-BINDING] [TLS] lasgt call comments (… Nicolas Williams
- Re: [CHANNEL-BINDING] [TLS] RESOLVED (Re: [sasl] … Larry Zhu
- [CHANNEL-BINDING] New Problem (Was: Last Call: dr… Nicolas Williams
- Re: [CHANNEL-BINDING] [TLS] New Problem (Was: Las… Larry Zhu
- Re: [CHANNEL-BINDING] [TLS] New Problem (Was: Las… Nicolas Williams