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Re: [TLS] Deprecating TLS 1.0, 1.1 and SHA1 signature algorithms

Andrei Popov <Andrei.Popov@microsoft.com> Tue, 12 January 2016 00:31 UTC

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From: Andrei Popov <Andrei.Popov@microsoft.com>
To: "tls@ietf.org" <tls@ietf.org>
Thread-Topic: [TLS] Deprecating TLS 1.0, 1.1 and SHA1 signature algorithms
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Date: Tue, 12 Jan 2016 00:30:52 +0000
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Subject: Re: [TLS] Deprecating TLS 1.0, 1.1 and SHA1 signature algorithms
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> (Please let's not re-open that thread).
Indeed, let's agree to disagree on this.

Cheers,

Andrei

-----Original Message-----
From: TLS [mailto:tls-bounces@ietf.org] On Behalf Of Viktor Dukhovni
Sent: Monday, January 11, 2016 3:43 PM
To: tls@ietf.org
Subject: Re: [TLS] Deprecating TLS 1.0, 1.1 and SHA1 signature algorithms

On Mon, Jan 11, 2016 at 11:38:25PM +0000, Andrei Popov wrote:

> Yes, per RFC 5246: 
> "   If the client provided a "signature_algorithms" extension, then all
>    certificates provided by the server MUST be signed by a
>    hash/signature algorithm pair that appears in that extension."

Yes.  Though for the record, and as discussed ad nauseam before, this is a bug in the RFC, and should not be implemented as written.
(Please let's not re-open that thread).

Ideally, at some point SChannel will implement the TLS 1.3 draft bug fix also for TLS 1.2.

-- 
	Viktor.

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