policy_module(ntp, 1.11.0)

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

attribute_role ntpd_roles;

type ntp_drift_t;
files_type(ntp_drift_t)

type ntpd_t;
type ntpd_exec_t;
init_daemon_domain(ntpd_t, ntpd_exec_t)
role ntpd_roles types ntpd_t;

type ntpd_initrc_exec_t;
init_script_file(ntpd_initrc_exec_t)

type ntpd_unit_file_t;
systemd_unit_file(ntpd_unit_file_t)

type ntp_conf_t;
files_config_file(ntp_conf_t)

type ntpd_key_t;
files_type(ntpd_key_t)

type ntpd_log_t;
logging_log_file(ntpd_log_t)

type ntpd_tmp_t;
files_tmp_file(ntpd_tmp_t)

type ntpd_tmpfs_t;
files_tmpfs_file(ntpd_tmpfs_t)

type ntpd_var_run_t;
files_pid_file(ntpd_var_run_t)

type ntpdate_exec_t;
init_system_domain(ntpd_t, ntpdate_exec_t)

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

allow ntpd_t self:capability { chown dac_read_search  kill setgid setuid sys_time ipc_lock ipc_owner sys_chroot sys_nice sys_resource };
dontaudit ntpd_t self:capability { net_admin sys_tty_config fsetid sys_nice };
allow ntpd_t self:process { signal_perms getcap setcap setsched setrlimit };
allow ntpd_t self:fifo_file rw_fifo_file_perms;
allow ntpd_t self:shm create_shm_perms;
allow ntpd_t self:tcp_socket { accept listen };
allow ntpd_t self:socket create_socket_perms;

manage_dirs_pattern(ntpd_t, ntp_drift_t, ntp_drift_t)
manage_files_pattern(ntpd_t, ntp_drift_t, ntp_drift_t)
files_var_lib_filetrans(ntpd_t, ntp_drift_t, dir, "sntp")
files_var_lib_filetrans(ntpd_t, ntp_drift_t, dir, "sntp-kod")

allow ntpd_t ntp_conf_t:file read_file_perms;

read_files_pattern(ntpd_t, ntpd_key_t, ntpd_key_t)
read_lnk_files_pattern(ntpd_t, ntpd_key_t, ntpd_key_t)

allow ntpd_t ntpd_log_t:dir setattr_dir_perms;
manage_files_pattern(ntpd_t, ntpd_log_t, ntpd_log_t)
logging_log_filetrans(ntpd_t, ntpd_log_t, { file dir })

manage_dirs_pattern(ntpd_t, ntpd_tmp_t, ntpd_tmp_t)
manage_files_pattern(ntpd_t, ntpd_tmp_t, ntpd_tmp_t)
files_tmp_filetrans(ntpd_t, ntpd_tmp_t, { file dir })

manage_dirs_pattern(ntpd_t, ntpd_tmpfs_t, ntpd_tmpfs_t)
manage_files_pattern(ntpd_t, ntpd_tmpfs_t, ntpd_tmpfs_t)
fs_tmpfs_filetrans(ntpd_t, ntpd_tmpfs_t, { dir file })

manage_files_pattern(ntpd_t, ntpd_var_run_t, ntpd_var_run_t)
files_pid_filetrans(ntpd_t, ntpd_var_run_t, file)

can_exec(ntpd_t, ntpd_exec_t)
can_exec(ntpd_t, ntpdate_exec_t)

kernel_read_kernel_sysctls(ntpd_t)
kernel_read_system_state(ntpd_t)
kernel_read_network_state(ntpd_t)
kernel_request_load_module(ntpd_t)

corenet_all_recvfrom_netlabel(ntpd_t)
corenet_tcp_sendrecv_generic_if(ntpd_t)
corenet_udp_sendrecv_generic_if(ntpd_t)
corenet_tcp_sendrecv_generic_node(ntpd_t)
corenet_udp_sendrecv_generic_node(ntpd_t)
corenet_udp_bind_generic_node(ntpd_t)
corenet_udp_bind_ntp_port(ntpd_t)
corenet_tcp_connect_ntp_port(ntpd_t)
corenet_sendrecv_ntp_server_packets(ntpd_t)
corenet_sendrecv_ntp_client_packets(ntpd_t)

corenet_tcp_bind_ntske_port(ntpd_t)
corenet_tcp_connect_ntske_port(ntpd_t)

corecmd_exec_bin(ntpd_t)
corecmd_exec_shell(ntpd_t)

dev_read_sysfs(ntpd_t)
dev_read_urand(ntpd_t)
dev_rw_realtime_clock(ntpd_t)

domain_use_interactive_fds(ntpd_t)
domain_dontaudit_list_all_domains_state(ntpd_t)

files_read_etc_runtime_files(ntpd_t)
files_list_var_lib(ntpd_t)

fs_getattr_all_fs(ntpd_t)
fs_search_auto_mountpoints(ntpd_t)
# Necessary to communicate with gpsd devices
fs_rw_tmpfs_files(ntpd_t)

term_use_ptmx(ntpd_t)
term_use_unallocated_ttys(ntpd_t)

auth_use_nsswitch(ntpd_t)

init_exec_script_files(ntpd_t)

logging_send_syslog_msg(ntpd_t)

userdom_dontaudit_use_unpriv_user_fds(ntpd_t)
userdom_list_user_home_dirs(ntpd_t)

optional_policy(`
    clock_domtrans(ntpd_t)
')

optional_policy(`
	cron_system_entry(ntpd_t, ntpdate_exec_t)
')

optional_policy(`
	gpsd_rw_shm(ntpd_t)
')

optional_policy(`
	firstboot_dontaudit_use_fds(ntpd_t)
	firstboot_dontaudit_rw_pipes(ntpd_t)
	firstboot_dontaudit_rw_stream_sockets(ntpd_t)
')

optional_policy(`
	logrotate_exec(ntpd_t)
')

optional_policy(`
    ptp4l_rw_shm(ntpd_t)
')

optional_policy(`
	seutil_sigchld_newrole(ntpd_t)
')

optional_policy(`
    timemaster_read_pid_files(ntpd_t)
    timemaster_rw_shm(ntpd_t)
')

optional_policy(`
	udev_read_db(ntpd_t)
')