Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261519AbVDJQ7J (ORCPT ); Sun, 10 Apr 2005 12:59:09 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261521AbVDJQ7J (ORCPT ); Sun, 10 Apr 2005 12:59:09 -0400 Received: from mail.tmr.com ([216.238.38.203]:38660 "EHLO gatekeeper.tmr.com") by vger.kernel.org with ESMTP id S261519AbVDJQ7D (ORCPT ); Sun, 10 Apr 2005 12:59:03 -0400 Date: Sun, 10 Apr 2005 12:46:16 -0400 (EDT) From: Bill Davidsen To: Junio C Hamano cc: David Lang , linux-kernel@vger.kernel.org Subject: Re: Kernel SCM saga.. In-Reply-To: <7vzmw7as25.fsf@assigned-by-dhcp.cox.net> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1880 Lines: 50 On Sun, 10 Apr 2005, Junio C Hamano wrote: > >>>>> "DL" == David Lang writes: > > DL> just wanted to point out that recent news shows that sha1 isn't as > DL> good as it was thought to be (far easier to deliberatly create > DL> collisions then it should be) > > I suspect there is no need to do so... It's possible to generate another object with the same hash, but: - you can't just take your desired object and do magic to make it hash right - it may not have the same length (almost certainly) - it's still non-trivial in terms of computation needed > > Message-ID: > From: Linus Torvalds > Subject: Re: Kernel SCM saga.. > Date: Sat, 9 Apr 2005 09:16:22 -0700 (PDT) > > ... > > Linus > > (*) yeah, yeah, I know about the current theoretical case, and I don't > care. Not only is it theoretical, the way my objects are packed you'd have > to not just generate the same SHA1 for it, it would have to _also_ still > be a valid zlib object _and_ get the header to match the "type + length" > of object part. IOW, the object validity checks are actually even stricter > than just "sha1 matches". > > - > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ > -- bill davidsen CTO, TMR Associates, Inc Doing interesting things with little computers since 1979. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/