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Re: [TLS] Working Group Last Call for draft-ietf-tls-downgrade-scsv-00

Manuel Pégourié-Gonnard <mpg@polarssl.org> Mon, 20 October 2014 13:51 UTC

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Date: Mon, 20 Oct 2014 15:50:51 +0200
From: Manuel Pégourié-Gonnard <mpg@polarssl.org>
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To: Bodo Moeller <bmoeller@acm.org>
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Cc: "Joseph Salowey (jsalowey)" <jsalowey@cisco.com>, "<tls@ietf.org>" <tls@ietf.org>
Subject: Re: [TLS] Working Group Last Call for draft-ietf-tls-downgrade-scsv-00
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On 20/10/2014 14:51, Bodo Moeller wrote:
> Manuel Pégourié-Gonnard <mpg@polarssl.org>:
> 
>> The only problem I ran into was an interop issue with OpenSSL, which 
>> apparently does not like it if the SCSV appears before the actual
>> ciphersuites in the ciphersuite list. If the intention of the draft was
>> that the SCSV MUST be placed after the actual ciphersuites, it would be
>> good to state so using normative language, rather than the current one
>> which doesn't look normative:
> 
> This is not meant to be normative -- it's a bug in OpenSSL's server-side
> code. [If ClientHello.cipher_suites includes TLS_FALLBACK_SCSV, all
> following cipher suites are ignored by the server. This will be fixed in
> the next release.]
> 
Ok, thanks.

Manuel.

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