Re: [TLS] A la carte handshake negotiation

Viktor Dukhovni <ietf-dane@dukhovni.org> Fri, 12 June 2015 16:22 UTC

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Date: Fri, 12 Jun 2015 16:22:37 +0000
From: Viktor Dukhovni <ietf-dane@dukhovni.org>
To: tls@ietf.org
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References: <201506111558.21577.davemgarrett@gmail.com> <201506121213.02446.davemgarrett@gmail.com>
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Subject: Re: [TLS] A la carte handshake negotiation
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On Fri, Jun 12, 2015 at 12:13:02PM -0400, Dave Garrett wrote:

> It might even be warranted to use only DH_anon suites instead
> of ECDH_anon due to its more widespread use. This would allow usage of
> ECC without having to specify any new ECDH_anon suites for those lacking
> them but already having DH_anon suites.

I'm afraid I don't understand the above.  Also AECDH (ECDH_anon)
is not particularly rare:

    Jun 12 15:48:16 mournblade postfix/smtpd[25717]: Anonymous TLS connection established from xmpp.openssl.org[194.97.150.230]: TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)
    Jun 12 15:49:59 mournblade postfix/smtpd[10257]: Anonymous TLS connection established from xmpp.openssl.org[194.97.150.230]: TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)
    Jun 12 15:53:13 mournblade postfix/smtp[4626]: Anonymous TLS connection established to mail.ietf.org[4.31.198.44]:25: TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)
    Jun 12 15:53:17 mournblade postfix/smtpd[29043]: Anonymous TLS connection established from mail.ietf.org[4.31.198.44]: TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)
    Jun 12 16:01:15 mournblade postfix/smtpd[7342]: Anonymous TLS connection established from xmpp.openssl.org[194.97.150.230]: TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)
    Jun 12 16:05:29 mournblade postfix/smtpd[21581]: Anonymous TLS connection established from xmpp.openssl.org[194.97.150.230]: TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)
    Jun 12 16:07:14 mournblade postfix/smtpd[23383]: Anonymous TLS connection established from xmpp.openssl.org[194.97.150.230]: TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)
    Jun 12 16:08:56 mournblade postfix/smtpd[23383]: Anonymous TLS connection established from xmpp.openssl.org[194.97.150.230]: TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)
    Jun 12 16:09:47 mournblade postfix/smtpd[23383]: Anonymous TLS connection established from xmpp.openssl.org[194.97.150.230]: TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)
    Jun 12 16:13:08 mournblade postfix/smtpd[27271]: Anonymous TLS connection established from mail.ietf.org[4.31.198.44]: TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)

-- 
	Viktor.