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Re: [TLS] draft-ietf-tls-session-hash-04 and session resumption

Karthikeyan Bhargavan <karthik.bhargavan@gmail.com> Mon, 13 April 2015 08:26 UTC

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From: Karthikeyan Bhargavan <karthik.bhargavan@gmail.com>
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Date: Mon, 13 Apr 2015 10:26:36 +0200
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To: Martin Thomson <martin.thomson@gmail.com>
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Cc: Emilia Kasper <ekasper@google.com>, "tls@ietf.org" <tls@ietf.org>, Bill Cox <waywardgeek@google.com>
Subject: Re: [TLS] draft-ietf-tls-session-hash-04 and session resumption
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How about the following:
      If the original session did not use an extended master secret but
      the new ClientHello does contain the "extended_master_secret"
      extension, the server MUST fall back to a full handshake by
      sending a ServerHello that rejects session resumption and offers a
      new session.


On 11 Apr 2015, at 03:42, Martin Thomson <martin.thomson@gmail.com> wrote:

> On 10 April 2015 at 16:25, David Benjamin <davidben@chromium.org> wrote:
>>> If the original session did not use an extended master secret but the new
>>> ClientHello does contain the "extended_master_secret" extension, the server
>>> MUST reject the session and fall back to a full handshake.
> 
> WFM.
> 
> ... MUST reject the session *resumption* and fall back ...
> 
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> TLS@ietf.org
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