Re: [Syslog] Fingerprint/handshake

Rainer Gerhards <rgerhards@hq.adiscon.com> Thu, 29 May 2008 10:44 UTC

Return-Path: <syslog-bounces@ietf.org>
X-Original-To: syslog-archive@megatron.ietf.org
Delivered-To: ietfarch-syslog-archive@core3.amsl.com
Received: from [127.0.0.1] (localhost [127.0.0.1]) by core3.amsl.com (Postfix) with ESMTP id 4468A3A6B5F; Thu, 29 May 2008 03:44:45 -0700 (PDT)
X-Original-To: syslog@core3.amsl.com
Delivered-To: syslog@core3.amsl.com
Received: from localhost (localhost [127.0.0.1]) by core3.amsl.com (Postfix) with ESMTP id BF5903A6B47 for <syslog@core3.amsl.com>; Thu, 29 May 2008 03:44:43 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: 0
X-Spam-Level:
X-Spam-Status: No, score=0 tagged_above=-999 required=5 tests=[none]
Received: from mail.ietf.org ([64.170.98.32]) by localhost (core3.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id n6QwL+RjTR0u for <syslog@core3.amsl.com>; Thu, 29 May 2008 03:44:43 -0700 (PDT)
Received: from mailin.adiscon.com (hetzner.adiscon.com [85.10.198.18]) by core3.amsl.com (Postfix) with ESMTP id BFFCF28C249 for <syslog@ietf.org>; Thu, 29 May 2008 03:44:09 -0700 (PDT)
Received: from localhost (localhost [127.0.0.1]) by mailin.adiscon.com (Postfix) with ESMTP id D64F07AD8BB; Thu, 29 May 2008 12:41:43 +0200 (CEST)
Received: from mailin.adiscon.com ([127.0.0.1]) by localhost (localhost [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 0HG2xxOZXg6R; Thu, 29 May 2008 12:41:43 +0200 (CEST)
Received: from grfint2.intern.adiscon.com (p50989a7c.dip0.t-ipconnect.de [80.152.154.124]) by mailin.adiscon.com (Postfix) with ESMTP id 978587AD809; Thu, 29 May 2008 12:41:43 +0200 (CEST)
Received: from [172.19.2.1] ([172.19.2.1]) by grfint2.intern.adiscon.com with Microsoft SMTPSVC(6.0.3790.3959); Thu, 29 May 2008 12:44:07 +0200
From: Rainer Gerhards <rgerhards@hq.adiscon.com>
To: Balazs Scheidler <bazsi@balabit.hu>
In-Reply-To: <1212048724.28540.29.camel@bzorp.balabit>
References: <003901c8b9f7$b671959d$060013ac@intern.adiscon.com> <AC1CFD94F59A264488DC2BEC3E890DE505DFD8E5@xmb-sjc-225.amer.cisco.com> <577465F99B41C842AAFBE9ED71E70ABA309090@grfint2.intern.adiscon.com> <AC1CFD94F59A264488DC2BEC3E890DE505E7E825@xmb-sjc-225.amer.cisco.com> <577465F99B41C842AAFBE9ED71E70ABA3090E1@grfint2.intern.adiscon.com> <1212048724.28540.29.camel@bzorp.balabit>
Date: Thu, 29 May 2008 12:44:07 +0200
Message-Id: <1212057848.16825.16.camel@rgf9dev.intern.adiscon.com>
Mime-Version: 1.0
X-Mailer: Evolution 2.22.1 (2.22.1-2.fc9)
X-OriginalArrivalTime: 29 May 2008 10:44:07.0599 (UTC) FILETIME=[EBC71BF0:01C8C178]
Cc: syslog@ietf.org
Subject: Re: [Syslog] Fingerprint/handshake
X-BeenThere: syslog@ietf.org
X-Mailman-Version: 2.1.9
Precedence: list
List-Id: Security Issues in Network Event Logging <syslog.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/listinfo/syslog>, <mailto:syslog-request@ietf.org?subject=unsubscribe>
List-Archive: <http://www.ietf.org/pipermail/syslog>
List-Post: <mailto:syslog@ietf.org>
List-Help: <mailto:syslog-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/syslog>, <mailto:syslog-request@ietf.org?subject=subscribe>
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: 7bit
Sender: syslog-bounces@ietf.org
Errors-To: syslog-bounces@ietf.org

On Thu, 2008-05-29 at 10:12 +0200, Balazs Scheidler wrote:
> On Thu, 2008-05-29 at 09:45 +0200, Rainer Gerhards wrote:
> > Inline...
> > > -----Original Message-----
> > > From: Joseph Salowey (jsalowey) [mailto:jsalowey@cisco.com]
> > > Sent: Thursday, May 29, 2008 2:32 AM
> > > To: Rainer Gerhards; syslog@ietf.org
> > > Subject: RE: [Syslog] Fingerprint/handshake
> > > 
> > > Hi Rainer,
> > > 
> > > A TLS alert could be sent by the server indicating the error condition.
> > > Would this help?
> 
> > That's an interesting idea. Let me give it a try. Will provide feedback when I have done this. In any case, if it turns out to be a problem with one library, we may be better of mandating that all verification is done during the handshake...
> 
> By the way, I've read in your implementation report that it is not
> possible to terminate the handshake with OpenSSL either. This is not the
> case, you can do that.

Ah, good to know. So it looks like this is a single-library problem,
about which the standard should obviously not care.

Bazsi, could you do me a favor and let me know which callback you use,
so that I can get to the specifics (also for the GnuTLS folks). I'd
really appreciate that.


Thanks,
Rainer

_______________________________________________
Syslog mailing list
Syslog@ietf.org
https://www.ietf.org/mailman/listinfo/syslog