linux-kernel - Re: [PATCH 07/21] KEYS: Create a key type that can be used for general cryptographic operations [ver #3]

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Message-ID: <CALLzPKY87L_GTP57MwA=iz4Cn3inboBszJ5OfOSYtUcRJn4KQg@mail.gmail.com>
Date:	Wed, 18 Jan 2012 12:56:15 +0200
From:	"Kasatkin, Dmitry" <dmitry.kasatkin@...el.com>
To:	David Howells <dhowells@...hat.com>
Cc:	Mimi Zohar <zohar@...ux.vnet.ibm.com>, keyrings@...ux-nfs.org,
	linux-crypto@...r.kernel.org,
	linux-security-module@...r.kernel.org,
	linux-kernel@...r.kernel.org, arjan.van.de.ven@...el.com,
	alan.cox@...el.com
Subject: Re: [PATCH 07/21] KEYS: Create a key type that can be used for
 general cryptographic operations [ver #3]

On Tue, Jan 17, 2012 at 5:32 PM, David Howells <dhowells@...hat.com> wrote:
> Mimi Zohar <zohar@...ux.vnet.ibm.com> wrote:
>
>> Nice! Basically the 'crypto' key type ties crypto/ with security/keys.
>> Other than the posted pgp key parser used for verifying kernel module
>> signatures, I assume another use case could be to expose kernel
>> cryptography to userspace.  As there was a submission
>> https://lkml.org/lkml/2010/8/20/103 to do just this, there must be
>> userspace apps that would benefit.  This architecture would address a
>> number of concerns raised with the prior submission. (Refer to
>> http://lwn.net/Articles/401548/.)
>
> :-)
>
>> You'd probably want to move the 'crypto' key type to its own directory.
>
> Yeah.
>
> I'd also like to see if Dmitry's work can be absorbes into this infrastructure.
>

Hi David,

Crypto keys is very nice idea.
We thought some time ago about having dedicated key type for handling
public key cryptography operations,
but did not go that far. Also I did not want to mess-up with GnuPG
formats and just made straight-forward RSA implementation,
which can be handled by any crypto library, such as openssl.
We can easily take GPG signing scheme into use for IMA/EVM when it
gets to upstream.

- Dmitry

> David
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