Re: [TLS] RI, TLS Extension tolerance and version tolerance in
David-Sarah Hopwood <david-sarah@jacaranda.org> Tue, 15 December 2009 03:51 UTC
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Date: Tue, 15 Dec 2009 03:51:36 +0000
From: David-Sarah Hopwood <david-sarah@jacaranda.org>
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Subject: Re: [TLS] RI, TLS Extension tolerance and version tolerance in
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Yngve Nysaeter Pettersen wrote: > On Mon, 14 Dec 2009 20:11:48 +0100, Martin Rex <mrex@sap.com> wrote: > >> What you could use is either the MS SGC logic (which internally >> restarts the handshake mid-way), or successfully complete the >> handshake and renegotiate immediately after with better features. > > Not a good idea since it requires that the server knows about it. MS was > in charge of both sides for SGC. Indeed, when MS SGC was first implemented, it completely broke interoperability: <http://support.microsoft.com/kb/249863> # Web clients may fail to connect to Web sites that use Server Gated # Cryptography (SGC) for strong encryption when a secure connection is # required. If either the Internet server or Web client is running Microsoft # products, then the connection may fail. If the Internet server and Web # client are both running Microsoft products, then no problem occurs. I don't know how this was fixed, but it seems as though encouraging the use of an MS SGC-style protocol in other implementations is just asking for more interoperability problems. -- David-Sarah Hopwood ⚥ http://davidsarah.livejournal.com
- [TLS] RI, TLS Extension tolerance and version tol… Yngve N. Pettersen (Developer Opera Software ASA)
- Re: [TLS] RI, TLS Extension tolerance and version… Martin Rex
- Re: [TLS] RI, TLS Extension tolerance and version… David-Sarah Hopwood
- Re: [TLS] RI, TLS Extension tolerance and version… Yngve N. Pettersen (Developer Opera Software ASA)
- Re: [TLS] RI, TLS Extension tolerance and version… Martin Rex
- Re: [TLS] RI, TLS Extension tolerance and version… Yngve Nysaeter Pettersen
- Re: [TLS] RI, TLS Extension tolerance and version… Martin Rex
- Re: [TLS] RI, TLS Extension tolerance and version… Yngve Nysaeter Pettersen
- Re: [TLS] RI, TLS Extension tolerance and version… Nelson B Bolyard
- Re: [TLS] RI, TLS Extension tolerance and version… Martin Rex
- Re: [TLS] RI, TLS Extension tolerance and version… Yngve N. Pettersen (Developer Opera Software ASA)
- Re: [TLS] RI, TLS Extension tolerance and version… Michael D'Errico
- Re: [TLS] RI, TLS Extension tolerance and version… David-Sarah Hopwood
- Re: [TLS] RI, TLS Extension tolerance and version… David-Sarah Hopwood
- Re: [TLS] RI, TLS Extension tolerance and version… David-Sarah Hopwood
- Re: [TLS] RI, TLS Extension tolerance and version… David-Sarah Hopwood
- Re: [TLS] RI, TLS Extension tolerance and version… Yngve N. Pettersen (Developer Opera Software ASA)
- Re: [TLS] RI, TLS Extension tolerance and version… Martin Rex