linux-kernel - Re: [RFC][PATCH 0/4] ima: add support for custom template formats

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Date:	Wed, 13 Nov 2013 22:22:24 -0500
From:	Mimi Zohar <zohar@...ux.vnet.ibm.com>
To:	Roberto Sassu <roberto.sassu@...ito.it>
Cc:	linux-security-module@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-ima-devel@...ts.sourceforge.net, zohar@...ibm.com,
	d.kasatkin@...sung.com, james.l.morris@...cle.com
Subject: Re: [RFC][PATCH 0/4] ima: add support for custom template formats

On Thu, 2013-11-07 at 15:00 +0100, Roberto Sassu wrote:
> Hi everyone
> 
> currently accepted patches for the new template management mechanism allow to
> choose among a list of supported templates, statically defined in the code.
> This functionality is not flexible enough as users may want to include
> in their measurements list only information needed and not use predefined
> combinations.
> 
> For this reason, this patch set introduce the new kernel command line parameter
> 'ima_template_fmt' to specify a custom template format at boot time,
> i.e. a string of template fields identifiers concatenated with the '|'
> separator character. The complete list of defined template fields can be
> found in Documentation/security/IMA-templates.txt.
> 
> The format string is checked at the very beginning in the setup function
> ima_template_fmt_setup() so that, if it is wrong, IMA can go back to the
> default template, selected through a kernel configuration option.
> 
> To allow userspace tools parse a measurements list with a custom format, IMA
> provides as template name the same format string provided by users at boot
> time, so that tools know which information are included in a entry and extract
> them if they can handle listed template fields.
> 
> Roberto Sassu

Cool, this is a really nice patchset!

Signed-off-by: Mimi Zohar <zohar@...ibm.com>

> 
> Roberto Sassu (4):
>   ima: added error messages to template-related functions
>   ima: make a copy of template_fmt in template_desc_init_fields()
>   ima: display template format in meas. list if template name length is
>     zero
>   ima: added support for new kernel cmdline parameter ima_template_fmt
> 
>  Documentation/kernel-parameters.txt      |  4 ++
>  Documentation/security/IMA-templates.txt | 29 +++++++------
>  security/integrity/ima/ima_fs.c          | 18 ++++++--
>  security/integrity/ima/ima_template.c    | 71 ++++++++++++++++++++++++++++++--
>  4 files changed, 100 insertions(+), 22 deletions(-)
> 


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