writing a policy. Confused about domain transition.

[Daniel J Walsh]

yiruli at ccsl.carleton.ca wrote:
> Hi,
> I am practising to write a policy for a music player called soundjuicer.
> 
> Policy Tool I used:     selinux-polgengui
> 
> The beginning part of soundjuicer1.te is as follows:
> ----------------------------------------------------
> type soundjuicer1_t;
> type soundjuicer1_exec_t;
> application_domain(soundjuicer1_t, soundjuicer1_exec_t)
> role user_r types soundjuicer1_t;
> .....
> -------------------------------------------------------
> 
> The context of login id is (id -Z):
> user_u:user_r:user_t
> 
> I loaded the module. And then I run the music player both from terminal
> and GUI. I checked the context of the soundjuicer process.
> The context of the process is : user_u:user_r:user_t
> 
> Question:
> With the context for the process, user_u:user_r:user_t, can I say that
> the security policy for the program is not being enforced, because of
> the failure of domain transition?
> 
> Should the context of the process be: user_u:user_r:soundjuicer1_t?
> 
> thanks
> Yiru Li
> 
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You need to write a rule like


gen_require(`
	type user_t;
	role user_r;
	type user_tty_device_t, user_devpts_t;
')

soundjuicer1_run(user_t, user_r, { user_tty_device_t user_devpts_t })