[refpolicy] Fwd: [PATCH] checkpolicy: add support for using last path component in type transition rules

[cpebenito@tresys.com (Christopher J. PeBenito)]

On 03/29/11 10:24, Daniel J Walsh wrote:
> Any idea on how you what you would like to call these interfaces?
> 
> files_etc_named_filetrans', `
> 	gen_require(`
>      		type etc_t;
> 	')
> 
> 	type_transition $1 etc_t:file $2 $3;
> ')
> 
> interface(`sysnet_etc_filetrans_resolve_conf',`
> 	gen_require(`
> 		type net_conf_t;
> 	')
> 
> 	files_etc_named_filetrans($1, net_conf_t, resolv.conf)
> ')
> 
> sysnet_etc_filetrans_resolv_conf(unconfined_t)

I have two thoughts:

name_filetrans_pattern() and files_etc_name_filetrans()

or

nametrans_pattern() and files_etc_nametrans()


I like the second option because its shorter, but the first option is
probably the best choice as its more precise.  It also is future-proof,
in case the named type_transition statement is extended to some other
objects (e.g. KaiGai already feels it will be useful for databases).


> -------- Original Message --------
> Subject: [PATCH] checkpolicy: add support for using last path component
> in type transition rules
> Date: Mon, 28 Mar 2011 14:00:19 -0400
> From: Eric Paris <eparis@redhat.com>
> To: selinux at tycho.nsa.gov
> CC: method at manicmethod.com, sds at tycho.nsa.gov
> 
> This patch adds support for using the last path component as part of the
> information in making labeling decisions for new objects.  A example
> rule looks like so:
> 
> type_transition unconfined_t etc_t:file system_conf_t eric;
> 
> This rule says if unconfined_t creates a file in a directory labeled
> etc_t and the last path component is "eric" (no globbing, no matching
> magic, just exact strcmp) it should be labeled system_conf_t.
> 
> The kernel and policy representation does not have support for such
> rules in conditionals, and thus policy explicitly notes that fact if
> such a rule is added to a conditional.
> 
> Signed-off-by: Eric Paris <eparis@redhat.com>
> ---
[patch cut]

-- 
Chris PeBenito
Tresys Technology, LLC
www.tresys.com | oss.tresys.com