Re: [quicwg/base-drafts] Output of the discard keys design team (#2673)

David Schinazi <notifications@github.com> Thu, 09 May 2019 20:46 UTC

Return-Path: <bounces+848413-a050-quic-issues=ietf.org@sgmail.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 5CB6E120145 for <quic-issues@ietfa.amsl.com>; Thu, 9 May 2019 13:46:47 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -1.606
X-Spam-Level:
X-Spam-Status: No, score=-1.606 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, 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_NONE=-0.0001, SPF_PASS=-0.001, T_DKIMWL_WL_HIGH=-0.01] 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 J6Xu4rHDFCBM for <quic-issues@ietfa.amsl.com>; Thu, 9 May 2019 13:46:45 -0700 (PDT)
Received: from o8.sgmail.github.com (o8.sgmail.github.com [167.89.101.199]) (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 5C9771200E3 for <quic-issues@ietf.org>; Thu, 9 May 2019 13:46:45 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha1; c=relaxed/relaxed; d=github.com; h=from:reply-to:to:cc:in-reply-to:references:subject:mime-version:content-type:content-transfer-encoding:list-id:list-archive:list-post:list-unsubscribe; s=s20150108; bh=vxTqU/empIwxY6302Xq/U1pMKFk=; b=sJH6hyhqAjlTMmpy HKvHdjm4NLh3cnvMfNuZATz3p5h9VxoJN/DRrvPGNz3PKj8dEpz6RvwYgj/FrIn6 DqIqu1HdIG24g3/KBKgdB+aBVIwmQsV6QGvlFQ540wM6ii1Qy0MyCYPxHwi0q0J2 REsCH0RQozantqx4yl9w7rUHVvo=
Received: by filter1762p1mdw1.sendgrid.net with SMTP id filter1762p1mdw1-3526-5CD491B4-10 2019-05-09 20:46:44.218034332 +0000 UTC m=+85597.197729986
Received: from github-lowworker-6313c1a.cp1-iad.github.net (unknown [140.82.115.7]) by ismtpd0010p1iad2.sendgrid.net (SG) with ESMTP id uaxFAgoeQheqvsrXTFGnew for <quic-issues@ietf.org>; Thu, 09 May 2019 20:46:44.127 +0000 (UTC)
Received: from github.com (localhost [127.0.0.1]) by github-lowworker-6313c1a.cp1-iad.github.net (Postfix) with ESMTP id 128CA380089 for <quic-issues@ietf.org>; Thu, 9 May 2019 13:46:44 -0700 (PDT)
Date: Thu, 09 May 2019 20:46:44 +0000
From: David Schinazi <notifications@github.com>
Reply-To: quicwg/base-drafts <reply+AFTOJK5CLI5SMBYOF7FQJY524HCDJEVBNHHBUUAEMU@reply.github.com>
To: quicwg/base-drafts <base-drafts@noreply.github.com>
Cc: Subscribed <subscribed@noreply.github.com>
Message-ID: <quicwg/base-drafts/pull/2673/review/235815674@github.com>
In-Reply-To: <quicwg/base-drafts/pull/2673@github.com>
References: <quicwg/base-drafts/pull/2673@github.com>
Subject: Re: [quicwg/base-drafts] Output of the discard keys design team (#2673)
Mime-Version: 1.0
Content-Type: multipart/alternative; boundary="--==_mimepart_5cd491b41124b_408e3ff1c90cd960172641"; charset="UTF-8"
Content-Transfer-Encoding: 7bit
Precedence: list
X-GitHub-Sender: DavidSchinazi
X-GitHub-Recipient: quic-issues
X-GitHub-Reason: subscribed
X-Auto-Response-Suppress: All
X-GitHub-Recipient-Address: quic-issues@ietf.org
X-SG-EID: l64QuQ2uJCcEyUykJbxN122A6QRmEpucztpreh3Pak2xUFLKEanvjNTjoMGXF9xl8e/UnPhduJ/MzU EatrcvmHMbp+uWqoahjtBf1aUk108fZ/S/mrjg+PJOMpKiaWIkhisDCfTuFCm3/IQ7NuLh+rEOhDNE iSbP3l7ln5QxE+uTAEGu7x9r2H9KgvVLm8A/bZUxzkrWu3PPcKgfU7wco1ENlbxJhrttHfzCSat6Xl c=
Archived-At: <https://mailarchive.ietf.org/arch/msg/quic-issues/Tn4LTGaLXc4Us5qoMsQv9PminhY>
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: Thu, 09 May 2019 20:46:47 -0000

DavidSchinazi commented on this pull request.



> @@ -1116,9 +1145,21 @@ TLS KeyUpdate message.  Endpoints MUST treat the receipt of a TLS KeyUpdate
 message as a connection error of type 0x10a, equivalent to a fatal TLS alert of
 unexpected_message (see {{tls-errors}}).
 
-An endpoint MUST NOT initiate more than one key update at a time.  A new key
-cannot be used until the endpoint has received and successfully decrypted a
-packet with a matching KEY_PHASE.
+An endpoint MUST NOT initiate the first key update until the handshake is
+confirmed ({{handshake-confirmed}}). An endpoint MUST NOT initiate a subsequent
+key update until it has received an acknowledgment for a packet sent at the
+current KEY_PHASE.  This can be implemented by tracking the lowest packet
+number sent with each KEY_PHASE, and the highest acknowledged packet number
+in the 1-RTT space: once the latter is higher than or equal to the former,
+another key update can be initiated.
+
+Endpoints MAY limit the number of sets of keys they retain to two sets for
+removing packet protection and one set for protecting packets.  Older keys
+can be discarded.  Updating keys multiple times rapidly can cause
+packets to be effectively lost if packets are significantly delayed.

Fixed

-- 
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/pull/2673#discussion_r282659127