Re: [quicwg/base-drafts] Padding outside QUIC packet (#3333)

ekr <notifications@github.com> Sun, 12 January 2020 22:02 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 C544E120041 for <quic-issues@ietfa.amsl.com>; Sun, 12 Jan 2020 14:02:25 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -6.454
X-Spam-Level:
X-Spam-Status: No, score=-6.454 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_20=1.546, 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 w-ErGRF8eQUP for <quic-issues@ietfa.amsl.com>; Sun, 12 Jan 2020 14:02:23 -0800 (PST)
Received: from out-2.smtp.github.com (out-2.smtp.github.com [192.30.252.193]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 4A98D120020 for <quic-issues@ietf.org>; Sun, 12 Jan 2020 14:02:23 -0800 (PST)
Received: from github-lowworker-e8b54ca.ac4-iad.github.net (github-lowworker-e8b54ca.ac4-iad.github.net [10.52.23.39]) by smtp.github.com (Postfix) with ESMTP id 013701C06EA for <quic-issues@ietf.org>; Sun, 12 Jan 2020 14:02:22 -0800 (PST)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=github.com; s=pf2014; t=1578866542; bh=ZT3MAIB+i7d4nq1brRh8dpCFNYGvywF14WCl6nkkqRY=; h=Date:From:Reply-To:To:Cc:In-Reply-To:References:Subject:List-ID: List-Archive:List-Post:List-Unsubscribe:From; b=P+TlN31BSIK7VMETKrteU2RTYOR+uMo8DSY3tJANS7XZqqU3Jl3MT0qKjq1YrCmcA NXGN5jKMC6sqL5taAZZa4E4JGu3hTfdbrioErJj+jZbXZdkeWBiO4mDd7BijmJKLl2 xHmJAQOhV3EJ8m8FuwebbQBti+qBmAmNOHAHfpa0=
Date: Sun, 12 Jan 2020 14:02:21 -0800
From: ekr <notifications@github.com>
Reply-To: quicwg/base-drafts <reply+AFTOJK5HYBPX4TZYDMTFVVF4FDE63EVBNHHCBMO65M@reply.github.com>
To: quicwg/base-drafts <base-drafts@noreply.github.com>
Cc: Subscribed <subscribed@noreply.github.com>
Message-ID: <quicwg/base-drafts/issues/3333/573462194@github.com>
In-Reply-To: <quicwg/base-drafts/issues/3333@github.com>
References: <quicwg/base-drafts/issues/3333@github.com>
Subject: Re: [quicwg/base-drafts] Padding outside QUIC packet (#3333)
Mime-Version: 1.0
Content-Type: multipart/alternative; boundary="--==_mimepart_5e1b976de4562_38303f9e684cd95c4054f2"; 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/ANwtWsk06PfmZio4LEHVBD-vafs>
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, 12 Jan 2020 22:02:26 -0000

The only time you can do this is when you have only long header packets (essentially during the handshake). Because short header packets are not length delimited, if you pad on the outside it will be interpreted as part of the packet and the deprotection will fail.

-- 
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/3333#issuecomment-573462194