linux-kernel - Re: [RFC][PATCH v3 3/6] encrypted-keys: add key format support

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Message-ID: <5936.1296039791@redhat.com>
Date:	Wed, 26 Jan 2011 11:03:11 +0000
From:	David Howells <dhowells@...hat.com>
To:	Roberto Sassu <roberto.sassu@...ito.it>
Cc:	dhowells@...hat.com, linux-security-module@...r.kernel.org,
	keyrings@...ux-nfs.org, linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org, jmorris@...ei.org,
	zohar@...ux.vnet.ibm.com, safford@...son.ibm.com,
	ramunno@...ito.it, tyhicks@...ux.vnet.ibm.com,
	kirkland@...onical.com
Subject: Re: [RFC][PATCH v3 3/6] encrypted-keys: add key format support

Roberto Sassu <roberto.sassu@...ito.it> wrote:

> This patch introduces a new parameter, called 'format', that defines the
> format of data stored by encrypted keys. The 'default' format identifies
> encrypted keys containing only the symmetric key, while other formats can
> be defined to support additional information. The 'format' parameter is
> written in the datablob produced by commands 'keyctl print' or
> 'keyctl pipe' and is integrity protected by the HMAC.

Would it make more sense to take key=val pairs where you have the <format>
parameter?  Then you could have a format=default|foo|whatever argument and
you'd leave room for future addition of qualifiers.

David
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