From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jakub Narebski Subject: Re: Supporting hashes other than SHA-1 Date: Tue, 12 May 2009 05:55:43 -0700 (PDT) Message-ID: References: <20090511195242.GA14756@foursquare.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: git@vger.kernel.org To: Chris Frey X-From: git-owner@vger.kernel.org Tue May 12 15:04:00 2009 Return-path: Envelope-to: gcvg-git-2@gmane.org Received: from vger.kernel.org ([209.132.176.167]) by lo.gmane.org with esmtp (Exim 4.50) id 1M3reI-0007qT-Ct for gcvg-git-2@gmane.org; Tue, 12 May 2009 15:03:58 +0200 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751989AbZELNDp (ORCPT ); Tue, 12 May 2009 09:03:45 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751956AbZELNDp (ORCPT ); Tue, 12 May 2009 09:03:45 -0400 Received: from mail-px0-f123.google.com ([209.85.216.123]:55879 "EHLO mail-px0-f123.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751678AbZELNDo (ORCPT ); Tue, 12 May 2009 09:03:44 -0400 X-Greylist: delayed 481 seconds by postgrey-1.27 at vger.kernel.org; Tue, 12 May 2009 09:03:44 EDT Received: by pxi29 with SMTP id 29so107483pxi.33 for ; Tue, 12 May 2009 06:03:45 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:received:received:received :x-authentication-warning:to:cc:subject:references:from:date :in-reply-to:message-id:lines:user-agent:mime-version:content-type; bh=RWqaqQ2bQmGt+viKTQZp76jHaMfcOJ1Bl52EnIdRTNo=; b=HPM3jSrpRsEWMG84mznl54ZUdYzZy8nfPDFT9qXVZ2aMf+YWOimpUVGfeJo6UapPwH Mec2iVF3g50VyefhmC20j72UiBdsmpIQLgMTM2kcEP4nVmxV4yL4SdILgNU5eHVI6atC qJanQIIGAjZePY5Ba5kGo8ioSX6vOIXpL2hRY= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=x-authentication-warning:to:cc:subject:references:from:date :in-reply-to:message-id:lines:user-agent:mime-version:content-type; b=fGx7olaiIFgV2JxByH4DA4maJDkiig2lHyV37aK+nLVLQ43Tv/7CaOVg+ePdNJjz2I 07re90ZzbjTrp63XI2he0nX59pR44eB1TUVW21RoT20efqOsTap/jQfsQ6eAoogqGvL8 8tgxNGapNgGYKiM4M5bnQiEvHKRPkYCKg1mic= Received: by 10.115.107.5 with SMTP id j5mr6550115wam.158.1242132944698; Tue, 12 May 2009 05:55:44 -0700 (PDT) Received: from localhost.localdomain (abvp65.neoplus.adsl.tpnet.pl [83.8.213.65]) by mx.google.com with ESMTPS id m26sm9484575pof.0.2009.05.12.05.55.40 (version=TLSv1/SSLv3 cipher=RC4-MD5); Tue, 12 May 2009 05:55:43 -0700 (PDT) Received: from localhost.localdomain (localhost.localdomain [127.0.0.1]) by localhost.localdomain (8.13.4/8.13.4) with ESMTP id n4CCtPKs028538; Tue, 12 May 2009 14:55:28 +0200 Received: (from jnareb@localhost) by localhost.localdomain (8.13.4/8.13.4/Submit) id n4CCtH44028534; Tue, 12 May 2009 14:55:17 +0200 X-Authentication-Warning: localhost.localdomain: jnareb set sender to jnareb@gmail.com using -f In-Reply-To: User-Agent: Gnus/5.09 (Gnus v5.9.0) Emacs/21.4 Sender: git-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: git@vger.kernel.org Archived-At: Jakub Narebski writes: > Chris Frey writes: > > > Considering the recent news regarding SHA-1's newly found weaknesses, > > is there any general interest in making git flexible enough to support > > other hashes in the future? > > First, there isn't as far as I know any 'known preimage' attack > against SHA-1, and only that would truly matter for Git. > > Second, this issue was discussed in depth in the past; check git > mailing list archives, please... See also this blog entry (and comments): http://kitenet.net/~joey/blog/entry/sha-1/ -- Jakub Narebski Poland ShadeHawk on #git