Re: [TLS] Comments on draft-rescorla-tls-renegotiation-01.txt
Martin Rex <mrex@sap.com> Wed, 25 November 2009 18:32 UTC
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From: Martin Rex <mrex@sap.com>
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Date: Wed, 25 Nov 2009 19:32:02 +0100
In-Reply-To: <6b9359640911251020j469c9bb2i4cd12a759e7c5ca2@mail.gmail.com> from "Kyle Hamilton" at Nov 25, 9 10:20:10 am
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Cc: tls@ietf.org
Subject: Re: [TLS] Comments on draft-rescorla-tls-renegotiation-01.txt
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Kyle Hamilton wrote: > > On Tue, Nov 24, 2009 at 4:34 PM, Martin Rex <mrex@sap.com> wrote: > > > > Aha. Someone noticed that the S->C signaling is missing. > > > > I suggest using a bit in ServerHello.server_version. > > I don't think that many conforming clients are going to be okay with > that, since they're sending {0x03 0x04}, and you're having the server > send back {0x83 0x04} or {0x03 0x84}. > > The spec of TLS 1.0 implies that the client SHOULD terminate the > connection if it receives back a higher major version number (or minor > version number) than it was expecting. Client conforming to rfc2246, rfc4346 or rfc5246 will not send the magic cipher suite and therefore never get to see this modified server_version. The will also be kicked in a renegotiation handshake. Implementation conforming to the spec that standardizes secure TLS renegotiation will perfectly well understand whatever S->C signal that spec contains. and it will be spec compliant. Spec updates can certainly allow behaviour previously not allowed, but needs provisions not to confuse old implementations. see also http://www.ietf.org/mail-archive/web/tls/current/msg04748.html -Martin
- [TLS] Comments on draft-rescorla-tls-renegotiatio… Kyle Hamilton
- Re: [TLS] Comments on draft-rescorla-tls-renegoti… Nicolas Williams
- Re: [TLS] Comments on draft-rescorla-tls-renegoti… Martin Rex
- Re: [TLS] Comments on draft-rescorla-tls-renegoti… Kyle Hamilton
- Re: [TLS] Comments on draft-rescorla-tls-renegoti… Marsh Ray
- Re: [TLS] Comments on draft-rescorla-tls-renegoti… Martin Rex