[quicwg/base-drafts] Remove handshake confirmed test for KeyUpdte (#3212)

ekr <notifications@github.com> Sun, 10 November 2019 22:41 UTC

Return-Path: <noreply@github.com>
X-Original-To: quic-issues@ietfa.amsl.com
Delivered-To: quic-issues@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id A438D120115 for <quic-issues@ietfa.amsl.com>; Sun, 10 Nov 2019 14:41:08 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -6.596
X-Spam-Level:
X-Spam-Status: No, score=-6.596 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, HTML_IMAGE_ONLY_28=1.404, HTML_MESSAGE=0.001, MAILING_LIST_MULTI=-1, RCVD_IN_DNSWL_HI=-5, SPF_HELO_NONE=0.001, SPF_PASS=-0.001] autolearn=ham autolearn_force=no
Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (1024-bit key) header.d=github.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 6fZmtHobV7H2 for <quic-issues@ietfa.amsl.com>; Sun, 10 Nov 2019 14:41:06 -0800 (PST)
Received: from out-6.smtp.github.com (out-6.smtp.github.com [192.30.252.197]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id BCD4B120044 for <quic-issues@ietf.org>; Sun, 10 Nov 2019 14:41:06 -0800 (PST)
Received: from github-lowworker-d31a065.va3-iad.github.net (github-lowworker-d31a065.va3-iad.github.net [10.48.17.70]) by smtp.github.com (Postfix) with ESMTP id E928C1C0507 for <quic-issues@ietf.org>; Sun, 10 Nov 2019 14:41:05 -0800 (PST)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=github.com; s=pf2014; t=1573425665; bh=L4R/2fRYeI5GyZdwmSs9wnwZ2I9iMW/7uQsP+TdapPc=; h=Date:From:Reply-To:To:Cc:Subject:List-ID:List-Archive:List-Post: List-Unsubscribe:From; b=ooRX2zclkjibH56avsAVc6giim3dW5Pp5jlx2/Hhtd7csAcYI5uduEwRmNFVWbZ0q 6n3br1G8hhKoNS34FF8zjL7zZpMNvfuMPLnO+SgOrbPkkT2YHalO2enywSV5JNnicJ hqTYAdPnDE7yagPqJJ51YBNwGNOrcEsVESsLW844=
Date: Sun, 10 Nov 2019 14:41:05 -0800
From: ekr <notifications@github.com>
Reply-To: quicwg/base-drafts <reply+AFTOJK2Y6YJZJG3467CB2CN32XCIDEVBNHHB6CGIZA@reply.github.com>
To: quicwg/base-drafts <base-drafts@noreply.github.com>
Cc: Subscribed <subscribed@noreply.github.com>
Message-ID: <quicwg/base-drafts/issues/3212@github.com>
Subject: [quicwg/base-drafts] Remove handshake confirmed test for KeyUpdte (#3212)
Mime-Version: 1.0
Content-Type: multipart/alternative; boundary="--==_mimepart_5dc89201dace2_36aa3fbe58ecd96013530c4"; charset="UTF-8"
Content-Transfer-Encoding: 7bit
Precedence: list
X-GitHub-Sender: ekr
X-GitHub-Recipient: quic-issues
X-GitHub-Reason: subscribed
X-Auto-Response-Suppress: All
X-GitHub-Recipient-Address: quic-issues@ietf.org
Archived-At: <https://mailarchive.ietf.org/arch/msg/quic-issues/FBD0gNlXB-yv-E_CwBJlLt8weeo>
X-BeenThere: quic-issues@ietf.org
X-Mailman-Version: 2.1.29
List-Id: Notification list for GitHub issues related to the QUIC WG <quic-issues.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/quic-issues>, <mailto:quic-issues-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/quic-issues/>
List-Post: <mailto:quic-issues@ietf.org>
List-Help: <mailto:quic-issues-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/quic-issues>, <mailto:quic-issues-request@ietf.org?subject=subscribe>
X-List-Received-Date: Sun, 10 Nov 2019 22:41:09 -0000

S 6.1 Says

   An endpoint MUST NOT initiate a key update prior to having confirmed
   the handshake (Section 4.1.2).  An endpoint MUST NOT initiate a
   subsequent key update prior unless it has received an acknowledgment
   for a packet that was sent protected with keys from the current key
   phase.

However, I believe that the requirement to have confirmed the
handshake is redundant. As a reminder, the conditions under which the
handshake is confirmed are:

   (1) the handshake is complete, and
   (2) the endpoint has received an acknowledgment for a
       packet sent with 1-RTT keys

1. On the client side, the 1-RTT keys aren't available until the handshake
   is complete, so it's not possible to send 1-RTT packet and therefore
   not possible to have them ACKed.

2. On the server side, the 1-RTT keys are available before the handshake
   is complete, but because the server is forbidden from reading any
   1-RTT data before processing CFIN (S 5.6), it *also* cannot have
   received an acknowledgement for a packet sent with 1-RTT keys.

In other words, condition (2) implies condition (1), no?


-- 
You are receiving this because you are subscribed to this thread.
Reply to this email directly or view it on GitHub:
https://github.com/quicwg/base-drafts/issues/3212