policy_module(entropyd, 1.7.0)

########################################
#
# Declarations
#

## <desc>
## <p>
##   Allow the use of the audio devices as the source for the entropy feeds
## </p>
## </desc>
gen_tunable(entropyd_use_audio, false)

type entropyd_t;
type entropyd_exec_t;
init_daemon_domain(entropyd_t, entropyd_exec_t)

type entropyd_var_run_t;
files_pid_file(entropyd_var_run_t)

########################################
#
# Local policy
#

allow entropyd_t self:capability { dac_override ipc_lock sys_admin };
dontaudit entropyd_t self:capability sys_tty_config;
allow entropyd_t self:process signal_perms;
allow entropyd_t self:unix_dgram_socket create_socket_perms;

manage_files_pattern(entropyd_t, entropyd_var_run_t, entropyd_var_run_t)
files_pid_filetrans(entropyd_t, entropyd_var_run_t, file)

kernel_rw_kernel_sysctl(entropyd_t)
kernel_list_proc(entropyd_t)
kernel_read_proc_symlinks(entropyd_t)

dev_read_sysfs(entropyd_t)
dev_read_urand(entropyd_t)
dev_write_urand(entropyd_t)
dev_read_rand(entropyd_t)
dev_write_rand(entropyd_t)

files_read_etc_files(entropyd_t)
files_read_usr_files(entropyd_t)

fs_getattr_all_fs(entropyd_t)
fs_search_auto_mountpoints(entropyd_t)

domain_use_interactive_fds(entropyd_t)

logging_send_syslog_msg(entropyd_t)

miscfiles_read_localization(entropyd_t)

userdom_dontaudit_use_unpriv_user_fds(entropyd_t)
userdom_dontaudit_search_user_home_dirs(entropyd_t)

tunable_policy(`entropyd_use_audio',`
	dev_read_sound(entropyd_t)
	# set sound card parameters such as sample format, number of channels
	# and sample rate.
	dev_write_sound(entropyd_t)
')

optional_policy(`
	tunable_policy(`entropyd_use_audio',`
		alsa_read_lib(entropyd_t)
		alsa_read_rw_config(entropyd_t)
	')
')

optional_policy(`
	seutil_sigchld_newrole(entropyd_t)
')

optional_policy(`
	udev_read_db(entropyd_t)
')