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Re: [TLS] rfc7366: is encrypt-then-mac implemented?

Manuel Pégourié-Gonnard <mpg@polarssl.org> Sat, 01 November 2014 23:45 UTC

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Date: Sun, 02 Nov 2014 00:45:18 +0100
From: Manuel Pégourié-Gonnard <mpg@polarssl.org>
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To: "Yngve N. Pettersen" <yngve@spec-work.net>, tls@ietf.org
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Subject: Re: [TLS] rfc7366: is encrypt-then-mac implemented?
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On 02/11/2014 00:36, Yngve N. Pettersen wrote:
> On Sun, 02 Nov 2014 00:30:58 +0100, Manuel Pégourié-Gonnard  
> <mpg@polarssl.org> wrote:
> 
> That looks fairly OK to me.
>
Cool, we're converging.

> A possible tweak one could add, is to define
> 
>      encrypted_content = ENC(content + padding + padding_length)
> 
> and use that in the formula instead.
> 
As Peter pointed out after the first version of my proposal, we need two
versions: one for TLS 1.0 (no IV) and one for higher versions, to point out the
IV is included.

Manuel.

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