From: Adrian Bunk <bunk@stusta.de>
To: Kyle Moffett <mrmacman_g4@mac.com>
Cc: "Trond Myklebust" <trond.myklebust@fys.uio.no>,
"David Härdeman" <david@2gen.com>,
"David Howells" <dhowells@redhat.com>,
"Christoph Hellwig" <hch@infradead.org>,
keyrings@linux-nfs.org, linux-kernel@vger.kernel.org
Subject: Re: [Keyrings] Re: [PATCH 01/04] Add multi-precision-integer maths library
Date: Sat, 28 Jan 2006 01:27:41 +0100 [thread overview]
Message-ID: <20060128002741.GE3777@stusta.de> (raw)
In-Reply-To: <8155F461-1703-476B-8C5D-B834EE49905D@mac.com>
On Fri, Jan 27, 2006 at 06:35:40PM -0500, Kyle Moffett wrote:
> On Jan 27, 2006, at 17:19, Trond Myklebust wrote:
> >On Fri, 2006-01-27 at 21:41 +0100, David Härdeman wrote:
> >
> >>For example, a backup daemon which wishes to store the backup on
> >>another host using ssh. Usually this is solved by storing an
> >>unencrypted key in the fs or by providing a connection to a ssh-
> >>agent which has been preloaded with the proper key(s). Both are
> >>quite inelegant solutions. With the in-kernel support, the daemon
> >>can request the key using the request_key call, and (provided
> >>proper scripts are written), the user who controls the relevant
> >>key can supply it. This in turn means that the backup daemon can
> >>sign using the key and read its public parts but not the private key.
> >
> >...but why would you want such a daemon to live in the kernel in
> >the first place? A backup application might perhaps need some
> >kernel support in order to ensure filesystem consistency, but that
> >does not mean that moving the entire daemon into the kernel is a
> >good idea.
>
> No, the point is not to put the backup daemon into the kernel, but to
> provide a way for the backup daemon and my user process to
> communicate DSA key details without completely giving the backup
> daemon my key. I may not entirely trust the backup daemon not to get
> compromised, but with support for the kernel keyring system,
> compromising the backup daemon would only compromise the backed up
> files, not the private keys and other secure data.
And why exactly is this not solvable through a userspace daemon?
> Cheers,
> Kyle Moffett
cu
Adrian
--
"Is there not promise of rain?" Ling Tan asked suddenly out
of the darkness. There had been need of rain for many days.
"Only a promise," Lao Er said.
Pearl S. Buck - Dragon Seed
next prev parent reply other threads:[~2006-01-28 0:27 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-01-26 21:58 [PATCH 00/04] Add DSA key type David Härdeman
2006-01-26 21:58 ` [PATCH 03/04] Add encryption ops to the keyctl syscall David Härdeman
2006-01-26 21:58 ` [PATCH 02/04] Add dsa crypto ops David Härdeman
2006-01-26 21:58 ` [PATCH 01/04] Add multi-precision-integer maths library David Härdeman
2006-01-27 9:28 ` Christoph Hellwig
2006-01-27 20:07 ` David Howells
2006-01-27 20:41 ` David Härdeman
2006-01-27 22:19 ` [Keyrings] " Trond Myklebust
2006-01-27 23:35 ` Kyle Moffett
2006-01-28 0:27 ` Adrian Bunk [this message]
2006-01-28 3:45 ` Trond Myklebust
2006-01-28 7:17 ` Kyle Moffett
2006-01-28 10:39 ` Adrian Bunk
2006-01-28 0:22 ` Adrian Bunk
2006-01-28 10:46 ` David Härdeman
2006-01-28 13:03 ` Adrian Bunk
2006-01-28 17:09 ` David Härdeman
2006-01-28 16:37 ` [Keyrings] " Trond Myklebust
2006-01-28 16:57 ` David Härdeman
2006-01-29 3:20 ` Trond Myklebust
2006-01-29 11:33 ` David Härdeman
2006-01-29 12:29 ` Adrian Bunk
2006-01-29 13:09 ` Arjan van de Ven
2006-01-29 20:05 ` Steve French
2006-01-29 20:52 ` Arjan van de Ven
2006-01-29 21:41 ` Steve French
2006-02-06 12:31 ` David Howells
2006-01-29 23:18 ` Adrian Bunk
2006-01-29 13:18 ` David Härdeman
2006-01-29 23:36 ` Adrian Bunk
2006-01-30 18:09 ` Nix
2006-01-29 16:38 ` Trond Myklebust
2006-01-29 18:49 ` Dax Kelson
2006-01-29 19:10 ` Trond Myklebust
2006-01-29 21:29 ` David Härdeman
2006-01-29 21:46 ` Trond Myklebust
2006-01-29 21:13 ` David Härdeman
2006-01-29 21:28 ` Trond Myklebust
2006-01-29 22:02 ` David Härdeman
2006-01-29 22:05 ` Trond Myklebust
2006-01-29 22:54 ` Kyle Moffett
2006-01-29 23:07 ` Trond Myklebust
2006-01-29 23:15 ` Adrian Bunk
2006-01-29 21:09 ` Pavel Machek
2006-01-26 21:58 ` [PATCH 04/04] Add dsa key type David Härdeman
2006-01-27 1:10 ` [PATCH 00/04] Add DSA " Herbert Xu
2006-01-27 7:18 ` David Härdeman
2006-01-27 20:11 ` David Howells
2006-01-27 23:22 ` Herbert Xu
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