linux-kernel - Re: [PATCH 2/3] binfmt_elf: Verify signature of signed elf binary

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Message-ID: <1358700917.2406.93.camel@falcor1.watson.ibm.com>
Date:	Sun, 20 Jan 2013 11:55:17 -0500
From:	Mimi Zohar <zohar@...ux.vnet.ibm.com>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	Vivek Goyal <vgoyal@...hat.com>, linux-kernel@...r.kernel.org,
	ebiederm@...ssion.com, pjones@...hat.com, dhowells@...hat.com,
	jwboyer@...hat.com
Subject: Re: [PATCH 2/3] binfmt_elf: Verify signature of signed elf binary

On Sun, 2013-01-20 at 08:17 -0800, H. Peter Anvin wrote:
> You then get into issues like: do we have to ban prelink as a result?

Once you change a file, the original signature shouldn't match.  If you
really trust prelink, then make prelink a trusted application that can
resign the modified file.  How to create/store/use private keys on the
target system is a separate issue.

thanks,

Mimi



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