linux-kernel - Re: [PATCH 00/14] EVM

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Fri, 04 Jun 2010 11:09:18 -0400
From:	Mimi Zohar <zohar@...ux.vnet.ibm.com>
To:	Shaz <shazalive@...il.com>
Cc:	Dmitry Kasatkin <dmitry.kasatkin@...ia.com>,
	James Morris <jmorris@...ei.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-security-module@...r.kernel.org" 
	<linux-security-module@...r.kernel.org>,
	David Safford <safford@...son.ibm.com>,
	Dave Hansen <dave@...ux.vnet.ibm.com>,
	Arjan van de Ven <arjan@...radead.org>,
	securityengineeringresearchgroup 
	<securityengineeringresearchgroup@...glegroups.com>
Subject: Re: [PATCH 00/14] EVM

On Fri, 2010-06-04 at 11:53 +0500, Shaz wrote:
> > Yes, verifying one file containing the hashes would be faster than
> > verifying individual hashes stored as extended attributes (xattrs), but
> > this does not take into account that files on a running system are being
> > modified or added. On a small form factor, the number of files is
> > limited, but would this scale well? In addition, what protects that one
> > file containing all the hashes from being modified?  So, if you limit
> 
> How about sealing to protect this file?

Was just indicating that the file needs to be protected. So, yes sealing
the file, based on PCRs, would work in a trusted boot environment.

> > the types of files to those that don't change, and the number of file
> > hashes, then using a single file would be faster.

Mimi


--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/