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Re: [TLS] Mail regarding draft-ietf-tls-record-limit

Ilari Liusvaara <ilariliusvaara@welho.com> Mon, 19 February 2018 17:18 UTC

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Date: Mon, 19 Feb 2018 19:18:27 +0200
From: Ilari Liusvaara <ilariliusvaara@welho.com>
To: Jim Schaad <ietf@augustcellars.com>
Cc: 'Martin Thomson' <martin.thomson@gmail.com>, tls@ietf.org, draft-ietf-tls-record-limit@ietf.org
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Subject: Re: [TLS] Mail regarding draft-ietf-tls-record-limit
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On Mon, Feb 19, 2018 at 08:31:53AM -0800, Jim Schaad wrote:
> Martin,
> 
> I think that the wording I would prefer would be along the lines of 
> 
> A server MUST NOT error on the value of the extension when a higher
> TLS version is requested.  The server MUST use the minimum of the
> requested value and the maximum value for the TLS version negotiated.
> A server MAY error if a the value of the extension is exceeded for
> the version of TLS requested.

You need to consider the case where there is some unknown-to-server
extension that happens to alter the limit.


-Ilari

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