linux-kernel - Re: RFC: 'ioctl' for keyrings

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]

Message-ID: <7511.1394817275@warthog.procyon.org.uk>
Date:	Fri, 14 Mar 2014 17:14:35 +0000
From:	David Howells <dhowells@...hat.com>
To:	Mimi Zohar <zohar@...ux.vnet.ibm.com>
Cc:	dhowells@...hat.com, torvalds@...ux-foundation.org,
	dmitry.kasatkin@...il.com, keyrings@...ux-nfs.org,
	linux-security-module@...r.kernel.org,
	linux-kernel@...r.kernel.org, David Safford <safford@...ibm.com>
Subject: Re: RFC: 'ioctl' for keyrings

Mimi Zohar <zohar@...ux.vnet.ibm.com> wrote:

> > As I understand the code, I think operations being performed from ->update()
> > are:
> > 
> >  (a) Resealing a key with a new pcrs (trusted).
> > 
> >  (b) Changing the master key (encrypted).
> > 
> > Mimi, Dmitry: is this list right?
> 
> In addition to resealing trusted keys to a new TPM PCR value, there are
> a few other options that can be modified (eg. keyauth, blobauth,
> pcrlock).  Encrypted keys can be encrypted/decrypted with a new master
> key (trusted or user key type).

Can (re)sealing a key be viewed as encrypting it?  Is the difference between
sealing a key and encrypting a key the use of hardware support?

David
--
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/