Re: [TLS] Status of X.509v3 TLS Feature Extension?
Nico Williams <nico@cryptonector.com> Tue, 29 April 2014 21:22 UTC
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Date: Tue, 29 Apr 2014 16:22:40 -0500
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From: Nico Williams <nico@cryptonector.com>
To: Adam Langley <agl@google.com>
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Cc: Geoffrey Keating <geoffk@geoffk.org>, "tls@ietf.org" <tls@ietf.org>
Subject: Re: [TLS] Status of X.509v3 TLS Feature Extension?
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On Tue, Apr 29, 2014 at 4:09 PM, Adam Langley <agl@google.com> wrote: > On Tue, Apr 29, 2014 at 1:57 PM, Paul Lambert <paul@marvell.com> wrote: >> Yes. This is critical. Implementations currently do not support >> OCSP stapling for intermediaries. Just fielded a system and we >> Ended up not being able to support business models with more >> than one level of usable hierarchy. Stapling is not useable >> now for multi-level hierarchies. > > It might well be that Must Staple is best done for just the leaf and > that pushed CRLs are used for intermediate revocations. That's the > deployment model that I think is mostly likely. > > As for Chrome's support: it's tough because we use different libraries > on different platforms (CAPI on Windows, OS X's library there and NSS > in other places). We also have a lot happening with our switch to > OpenSSL. So, while we would like to support Must Staple, that is > currently delaying it. Hopefully Firefox can beat us to it. The deployment model I imagine is: - servers run a daemon to get fresh OCSP Responses periodically - this daemon raises alerts if responses get too old - servers staple the responses fetched by this daemon - clients validate all stapled responses Why couldn't that work? There'd be a need to cache OCSP Responses for intermediates, sure. What else? Nico --
- [TLS] Status of X.509v3 TLS Feature Extension? Klemens Baum
- Re: [TLS] Status of X.509v3 TLS Feature Extension? Tom Ritter
- Re: [TLS] Status of X.509v3 TLS Feature Extension? Rob Stradling
- Re: [TLS] Status of X.509v3 TLS Feature Extension? Salz, Rich
- Re: [TLS] Status of X.509v3 TLS Feature Extension? Rob Stradling
- Re: [TLS] Status of X.509v3 TLS Feature Extension? Russ Housley
- Re: [TLS] Status of X.509v3 TLS Feature Extension? Viktor Dukhovni
- Re: [TLS] Status of X.509v3 TLS Feature Extension? Salz, Rich
- Re: [TLS] Status of X.509v3 TLS Feature Extension? Watson Ladd
- Re: [TLS] Status of X.509v3 TLS Feature Extension? Viktor Dukhovni
- Re: [TLS] Status of X.509v3 TLS Feature Extension? Salz, Rich
- Re: [TLS] Status of X.509v3 TLS Feature Extension? Viktor Dukhovni
- Re: [TLS] Status of X.509v3 TLS Feature Extension? Salz, Rich
- Re: [TLS] Status of X.509v3 TLS Feature Extension? Viktor Dukhovni
- Re: [TLS] Status of X.509v3 TLS Feature Extension? Salz, Rich
- Re: [TLS] Status of X.509v3 TLS Feature Extension? Viktor Dukhovni
- Re: [TLS] Status of X.509v3 TLS Feature Extension? Nico Williams
- Re: [TLS] Status of X.509v3 TLS Feature Extension? Adam Langley
- Re: [TLS] Status of X.509v3 TLS Feature Extension? Martin Rex
- Re: [TLS] Status of X.509v3 TLS Feature Extension? Martin Rex
- Re: [TLS] Status of X.509v3 TLS Feature Extension? Stephen Checkoway
- Re: [TLS] Status of X.509v3 TLS Feature Extension? Geoffrey Keating
- Re: [TLS] Status of X.509v3 TLS Feature Extension? Peter Gutmann
- Re: [TLS] Status of X.509v3 TLS Feature Extension? Stephen Checkoway
- Re: [TLS] Status of X.509v3 TLS Feature Extension? Nico Williams
- Re: [TLS] Status of X.509v3 TLS Feature Extension? Nico Williams
- Re: [TLS] Status of X.509v3 TLS Feature Extension? Geoffrey Keating
- Re: [TLS] Status of X.509v3 TLS Feature Extension? Rob Stradling
- Re: [TLS] Status of X.509v3 TLS Feature Extension? Phillip Hallam-Baker
- Re: [TLS] Status of X.509v3 TLS Feature Extension? Rob Stradling
- Re: [TLS] Status of X.509v3 TLS Feature Extension? Paul Lambert
- Re: [TLS] Status of X.509v3 TLS Feature Extension? Adam Langley
- Re: [TLS] Status of X.509v3 TLS Feature Extension? Nico Williams
- Re: [TLS] Status of X.509v3 TLS Feature Extension? Adam Langley
- Re: [TLS] Status of X.509v3 TLS Feature Extension? Salz, Rich
- Re: [TLS] Status of X.509v3 TLS Feature Extension? Nico Williams
- Re: [TLS] Status of X.509v3 TLS Feature Extension? Phillip Hallam-Baker