Re: [TLS] draft-ietf-tls-esni feedback

Rob Sayre <sayrer@gmail.com> Mon, 21 October 2019 19:01 UTC

Return-Path: <sayrer@gmail.com>
X-Original-To: tls@ietfa.amsl.com
Delivered-To: tls@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 966F71207FF for <tls@ietfa.amsl.com>; Mon, 21 Oct 2019 12:01:28 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -1.998
X-Spam-Level:
X-Spam-Status: No, score=-1.998 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, FREEMAIL_FROM=0.001, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001] autolearn=ham autolearn_force=no
Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=gmail.com
Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 5P0ffbkVrD4X for <tls@ietfa.amsl.com>; Mon, 21 Oct 2019 12:01:25 -0700 (PDT)
Received: from mail-il1-x12a.google.com (mail-il1-x12a.google.com [IPv6:2607:f8b0:4864:20::12a]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 974D6120241 for <tls@ietf.org>; Mon, 21 Oct 2019 12:01:25 -0700 (PDT)
Received: by mail-il1-x12a.google.com with SMTP id y5so13052029ilb.5 for <tls@ietf.org>; Mon, 21 Oct 2019 12:01:25 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=vS5mVp2oCGsN/H6VgN05lcAu+7d3Uc4Lf3W8QGbdXUg=; b=BTdtobI+Ulf0COlyfyhgh/Y/BIybNZ3jKXRrf8El1aV2HcJyC8WCvdwjx7XmKIFbzm WG8Nrp8/xMKMvITVGBvfpGET5WO9fBaW26aSuZC4wb37W7O0x61ndU9Ir9sHPE5iPy8T RxWg0t7sVyzVNap7nKQO/Q3rzLqhTEsJ3lyXzwv4bGH2D9H05+r2374CQbOqaDP7x0fm nH0V8WOOyXtxOR7T8shuW0eWN5IlmeZGheI013HiKZEUfGdyCBezk9MAiDLGbjaVWhjX YW9Cs/AcN4Txt3VT+VW3IZG/oHRF6gKuFetagp8BQAsCmpC67Zmd1S7vT2EgjOto/0N8 Cykg==
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=vS5mVp2oCGsN/H6VgN05lcAu+7d3Uc4Lf3W8QGbdXUg=; b=rTxes7A82xuEzO/OtkvbnsgTzYJ520qih7DedF1Th8Tt6W9ZoQacZwMQZMGRoWoAou umRpriQiOc4db2lAm+s7pavu0urJZ+HcgWcxiqTz1WEla+YQfM87SIAdBxxtbClXiOrJ dGSyD7eBhG4VFEr8ATBeXXeYwGnpV529saj6Ud9MHhE66SM/1BABPBMYyv3/LunBPm5/ wgBuDHHNqOu+ag55Vsjglm1OY67q3f55NidsGuw0WwfyZm8VNJb59K+ohkRsbF5oW9ng m7zL+wkx8gi+u+N/qrZBs2SeWjbwBruGJX0Z6Rdsve0zxTzBdoS8YsSfXAji1zvLa+kZ KA8g==
X-Gm-Message-State: APjAAAXQUIk6CdNjkZJkqEme7QM+bXaEf0H3QqMGPX0apCyJrsJxaNcY OqGMQ9ybdxPdsb5eEnkYGZKdYBWDxMAav7qyRTo=
X-Google-Smtp-Source: APXvYqw2ABl/19BpH838CHgzYCCnJ9Yzbvvv8wb80Kh5N8Ark4WiUXnZwadnsxQ6ls7cGsHhqtpyReIxV6MpR4/tmoM=
X-Received: by 2002:a92:48cf:: with SMTP id j76mr7757453ilg.189.1571684484715; Mon, 21 Oct 2019 12:01:24 -0700 (PDT)
MIME-Version: 1.0
References: <CAChr6Sw3f7du3JYxfcWSZje1zjDzsRBQyDjob-AvzjWeZzKW7g@mail.gmail.com> <CABcZeBPbw_KOo_ieSqkksYPeLtb9DufBz628oFPYc_Ue4S9iww@mail.gmail.com> <CAChr6SwB+7Jt2TLJSQh3q=Roizdt2=9jCBa9nq8KRxRo=86uZQ@mail.gmail.com> <CABcZeBNBtDK7q175tseEUiCVds=khj4xXYJZRf7GU9VGNDJ_Tg@mail.gmail.com> <CAChr6Sz6xHtFWjOKrLp3sp9MpC-SoU9Sx=vk22ditjShA7B=Kg@mail.gmail.com> <CABcZeBOnE+gyNu7GarAfO0bptoPfzQQ=VKeWLdpJBDM=E4yhzg@mail.gmail.com> <CAChr6SxWE66jPRbnBRtwNSn3L+uNFkoFBbYNOBAkKDN05qotoA@mail.gmail.com> <CABcZeBOy8ogJrmFajxX1pqjqgnE61gE=c3CWz+pp34NWHmGKbw@mail.gmail.com> <03e15760-dfce-cd7b-baea-56ac70d92192@cs.tcd.ie>
In-Reply-To: <03e15760-dfce-cd7b-baea-56ac70d92192@cs.tcd.ie>
From: Rob Sayre <sayrer@gmail.com>
Date: Mon, 21 Oct 2019 12:01:13 -0700
Message-ID: <CAChr6SzmpSn3Q8tBi+Pdc+Bq7stiukbufbh-jDt+AEtrkV8XGg@mail.gmail.com>
To: Stephen Farrell <stephen.farrell@cs.tcd.ie>
Cc: Eric Rescorla <ekr@rtfm.com>, "TLS@ietf.org" <tls@ietf.org>
Content-Type: multipart/alternative; boundary="0000000000006918a40595704f34"
Archived-At: <https://mailarchive.ietf.org/arch/msg/tls/HUIRn7bq9keyU9jZD1FpZXOKIGA>
Subject: Re: [TLS] draft-ietf-tls-esni feedback
X-BeenThere: tls@ietf.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: "This is the mailing list for the Transport Layer Security working group of the IETF." <tls.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/tls>, <mailto:tls-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/tls/>
List-Post: <mailto:tls@ietf.org>
List-Help: <mailto:tls-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/tls>, <mailto:tls-request@ietf.org?subject=subscribe>
X-List-Received-Date: Mon, 21 Oct 2019 19:01:40 -0000

On Mon, Oct 21, 2019 at 11:41 AM Stephen Farrell <stephen.farrell@cs.tcd.ie>;
wrote:

> My guess is that all of the above will lead to everyone
> always using 260 for this value, making it pointless
> and somewhat wasteful.
>

Whether it's wasteful depends on how big typical ClientHello (without early
data) messages are. If they'll easily fit in one packet, 260 doesn't matter.

This seems like something TLS WG should track, tbh.

thanks,
Rob