From owner-freebsd-security@FreeBSD.ORG Fri Sep 21 23:15:48 2012 Return-Path: Delivered-To: freebsd-security@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 97981106566C for ; Fri, 21 Sep 2012 23:15:48 +0000 (UTC) (envelope-from des@des.no) Received: from smtp.des.no (smtp.des.no [194.63.250.102]) by mx1.freebsd.org (Postfix) with ESMTP id 56FAC8FC0C for ; Fri, 21 Sep 2012 23:15:47 +0000 (UTC) Received: from ds4.des.no (smtp.des.no [194.63.250.102]) by smtp.des.no (Postfix) with ESMTP id ED88166CB; Sat, 22 Sep 2012 01:15:40 +0200 (CEST) Received: by ds4.des.no (Postfix, from userid 1001) id 9FEA28D81; Sat, 22 Sep 2012 01:15:40 +0200 (CEST) From: =?utf-8?Q?Dag-Erling_Sm=C3=B8rgrav?= To: RW References: <20120918211422.GA1400@garage.freebsd.pl> <867grqm3pt.fsf@ds4.des.no> <20120919184758.28589516@gumby.homeunix.com> <86sjadt677.fsf@ds4.des.no> <20120920230133.55b63dea@gumby.homeunix.com> Date: Sat, 22 Sep 2012 01:15:39 +0200 In-Reply-To: <20120920230133.55b63dea@gumby.homeunix.com> (RW's message of "Thu, 20 Sep 2012 23:01:33 +0100") Message-ID: <86sjabarxg.fsf@ds4.des.no> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/23.4 (berkeley-unix) MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Cc: freebsd-security@freebsd.org Subject: Re: Collecting entropy from device_attach() times. X-BeenThere: freebsd-security@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: "Security issues \[members-only posting\]" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 21 Sep 2012 23:15:48 -0000 RW writes: > Dag-Erling Sm=C3=B8rgrav writes: > > RW writes: > > > Reseeding doesn't throw away entropy > > Yes, it does. > Would you elaborate? I don't see what you mean by that? Never mind. I read through the code multiple times without seeing the line where it mixes in the old key. It does it in a very strange way, though: it doesn't just mix in the key, but the entire AES context. DES --=20 Dag-Erling Sm=C3=B8rgrav - des@des.no