From: Holger Hellmuth <hellmuth@ira.uka.de>
To: "Ævar Arnfjörð Bjarmason" <avarab@gmail.com>
Cc: Neal Kreitzinger <nkreitzinger@gmail.com>,
Barry Roberts <blr@robertsr.us>, git <git@vger.kernel.org>
Subject: Re: Replacing large blobs in git history
Date: Thu, 08 Mar 2012 16:39:57 +0100 [thread overview]
Message-ID: <4F58D2CD.2050502@ira.uka.de> (raw)
In-Reply-To: <CACBZZX4hinV8vkebyNCLp_Ac6L80aNbdGOFqg1nSsCuRktFFrg@mail.gmail.com>
On 07.03.2012 22:27, Ævar Arnfjörð Bjarmason wrote:
> Does something other than git-fsck actually check whether the
> collection of blobs you're getting from the remote when you clone have
> sensible sha1's?
>
> What'll happen if he replaces that 550MB blob with a 0 byte blob but
> hacks the object store so that it pretends to have the same sha1?
This is something I tested once because of security concerns (i.e. what
happens if a malicious intruder just drops something else into the
object store) and if I remember correctly only git-fsck was able to spot
the switch. But I didn't test cloning, only a few local operations.
next prev parent reply other threads:[~2012-03-08 15:39 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-03-06 16:09 Replacing large blobs in git history Barry Roberts
2012-03-06 20:49 ` Neal Kreitzinger
2012-03-07 21:27 ` Ævar Arnfjörð Bjarmason
2012-03-08 15:39 ` Holger Hellmuth [this message]
2012-03-08 21:22 ` Junio C Hamano
2012-03-07 9:04 ` Michael Haggerty
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