selinux-policy/policy/modules/services/lpd.te

policy_module(lpd, 1.12.0)

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

## <desc>
## <p>
## Use lpd server instead of cups
## </p>
## </desc>
gen_tunable(use_lpd_server, false)

type checkpc_t;
type checkpc_exec_t;
init_system_domain(checkpc_t, checkpc_exec_t)
role system_r types checkpc_t;

type checkpc_log_t;
logging_log_file(checkpc_log_t)

type lpd_t;
type lpd_exec_t;
init_daemon_domain(lpd_t, lpd_exec_t)

type lpd_tmp_t;
files_tmp_file(lpd_tmp_t)

type lpd_var_run_t;
files_pid_file(lpd_var_run_t)

type lpr_t;
type lpr_exec_t;
typealias lpr_t alias { user_lpr_t staff_lpr_t sysadm_lpr_t };
typealias lpr_t alias { auditadm_lpr_t secadm_lpr_t };
application_domain(lpr_t, lpr_exec_t)
ubac_constrained(lpr_t)

type lpr_tmp_t;
typealias lpr_tmp_t alias { user_lpr_tmp_t staff_lpr_tmp_t sysadm_lpr_tmp_t };
typealias lpr_tmp_t alias { auditadm_lpr_tmp_t secadm_lpr_tmp_t };
files_tmp_file(lpr_tmp_t)
ubac_constrained(lpr_tmp_t)

# Type for spool files.
type print_spool_t;
typealias print_spool_t alias { user_print_spool_t staff_print_spool_t sysadm_print_spool_t };
typealias print_spool_t alias { auditadm_print_spool_t secadm_print_spool_t };
files_type(print_spool_t)
ubac_constrained(print_spool_t)

type printer_t;
files_type(printer_t)

type printconf_t;
files_type(printconf_t)

########################################
#
# Checkpc local policy
#

# Allow checkpc to access the lpd spool so it can check & fix it.
# This requires that /usr/sbin/checkpc have type checkpc_t.

allow checkpc_t self:capability { setgid setuid dac_override };
allow checkpc_t self:process signal_perms;
allow checkpc_t self:unix_stream_socket create_socket_perms;
allow checkpc_t self:tcp_socket create_socket_perms;
allow checkpc_t self:udp_socket create_socket_perms;

allow checkpc_t checkpc_log_t:file manage_file_perms;
logging_log_filetrans(checkpc_t, checkpc_log_t, file)

allow checkpc_t lpd_var_run_t:dir search_dir_perms;
files_search_pids(checkpc_t)

rw_files_pattern(checkpc_t, print_spool_t, print_spool_t)
delete_files_pattern(checkpc_t, print_spool_t, print_spool_t)
files_search_spool(checkpc_t)

allow checkpc_t printconf_t:file getattr;
allow checkpc_t printconf_t:dir list_dir_perms;

kernel_read_system_state(checkpc_t)

corenet_all_recvfrom_unlabeled(checkpc_t)
corenet_all_recvfrom_netlabel(checkpc_t)
corenet_tcp_sendrecv_generic_if(checkpc_t)
corenet_udp_sendrecv_generic_if(checkpc_t)
corenet_tcp_sendrecv_generic_node(checkpc_t)
corenet_udp_sendrecv_generic_node(checkpc_t)
corenet_tcp_sendrecv_all_ports(checkpc_t)
corenet_udp_sendrecv_all_ports(checkpc_t)
corenet_tcp_connect_all_ports(checkpc_t)
corenet_sendrecv_all_client_packets(checkpc_t)

dev_append_printer(checkpc_t)

# This is less desirable, but checkpc demands /bin/bash and /bin/chown:
corecmd_exec_shell(checkpc_t)
corecmd_exec_bin(checkpc_t)

domain_use_interactive_fds(checkpc_t)

files_read_etc_files(checkpc_t)
files_read_etc_runtime_files(checkpc_t)

init_use_script_ptys(checkpc_t)
# Allow access to /dev/console through the fd:
init_use_fds(checkpc_t)

sysnet_read_config(checkpc_t)

userdom_use_user_terminals(checkpc_t)

optional_policy(`
	cron_system_entry(checkpc_t, checkpc_exec_t)
')

optional_policy(`
	logging_send_syslog_msg(checkpc_t)
')

optional_policy(`
	nis_use_ypbind(checkpc_t)
')

########################################
#
# Lpd local policy
#

allow lpd_t self:capability { setgid setuid net_bind_service dac_read_search dac_override chown fowner };
dontaudit lpd_t self:capability sys_tty_config;
allow lpd_t self:process signal_perms;
allow lpd_t self:fifo_file rw_fifo_file_perms;
allow lpd_t self:unix_stream_socket create_stream_socket_perms;
allow lpd_t self:unix_dgram_socket create_socket_perms;
allow lpd_t self:tcp_socket create_stream_socket_perms;
allow lpd_t self:udp_socket create_stream_socket_perms;

manage_dirs_pattern(lpd_t, lpd_tmp_t, lpd_tmp_t)
manage_files_pattern(lpd_t, lpd_tmp_t, lpd_tmp_t)
files_tmp_filetrans(lpd_t, lpd_tmp_t, { file dir })

manage_files_pattern(lpd_t, lpd_var_run_t, lpd_var_run_t)
manage_sock_files_pattern(lpd_t, lpd_var_run_t, lpd_var_run_t)
files_pid_filetrans(lpd_t, lpd_var_run_t, file)

# Write to /var/spool/lpd.
manage_files_pattern(lpd_t, print_spool_t, print_spool_t)
files_search_spool(lpd_t)

# lpd must be able to execute the filter utilities in /usr/share/printconf.
allow lpd_t printconf_t:dir list_dir_perms;
can_exec(lpd_t, printconf_t)

# Create and bind to /dev/printer.
allow lpd_t printer_t:lnk_file manage_lnk_file_perms;
dev_filetrans(lpd_t, printer_t, lnk_file)

kernel_read_kernel_sysctls(lpd_t)
# bash wants access to /proc/meminfo
kernel_read_system_state(lpd_t)

corenet_all_recvfrom_unlabeled(lpd_t)
corenet_all_recvfrom_netlabel(lpd_t)
corenet_tcp_sendrecv_generic_if(lpd_t)
corenet_udp_sendrecv_generic_if(lpd_t)
corenet_tcp_sendrecv_generic_node(lpd_t)
corenet_udp_sendrecv_generic_node(lpd_t)
corenet_tcp_sendrecv_all_ports(lpd_t)
corenet_udp_sendrecv_all_ports(lpd_t)
corenet_tcp_bind_generic_node(lpd_t)
corenet_tcp_bind_printer_port(lpd_t)
corenet_sendrecv_printer_server_packets(lpd_t)

dev_read_sysfs(lpd_t)
dev_rw_printer(lpd_t)

fs_getattr_all_fs(lpd_t)
fs_search_auto_mountpoints(lpd_t)

# Filter scripts may be shell scripts, and may invoke progs like /bin/mktemp
corecmd_exec_bin(lpd_t)
corecmd_exec_shell(lpd_t)

domain_use_interactive_fds(lpd_t)

files_read_etc_runtime_files(lpd_t)
files_read_usr_files(lpd_t)
# for defoma
files_list_world_readable(lpd_t)
files_read_world_readable_files(lpd_t)
files_read_world_readable_symlinks(lpd_t)
files_list_var_lib(lpd_t)
files_read_var_lib_files(lpd_t)
files_read_var_lib_symlinks(lpd_t)
# config files for lpd are of type etc_t, probably should change this
files_read_etc_files(lpd_t)

logging_send_syslog_msg(lpd_t)

miscfiles_read_fonts(lpd_t)
miscfiles_read_localization(lpd_t)

sysnet_read_config(lpd_t)

userdom_dontaudit_use_unpriv_user_fds(lpd_t)
userdom_dontaudit_search_user_home_dirs(lpd_t)

optional_policy(`
	nis_use_ypbind(lpd_t)
')

optional_policy(`
	seutil_sigchld_newrole(lpd_t)
')

optional_policy(`
	udev_read_db(lpd_t)
')

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

allow lpr_t self:capability { setuid dac_override net_bind_service chown };
allow lpr_t self:unix_stream_socket create_stream_socket_perms;
allow lpr_t self:tcp_socket create_socket_perms;
allow lpr_t self:udp_socket create_socket_perms;

can_exec(lpr_t, lpr_exec_t)

# Allow lpd to read, rename, and unlink spool files.
allow lpd_t print_spool_t:file { read_file_perms rename_file_perms delete_file_perms };

kernel_read_kernel_sysctls(lpr_t)

corenet_all_recvfrom_unlabeled(lpr_t)
corenet_all_recvfrom_netlabel(lpr_t)
corenet_tcp_sendrecv_generic_if(lpr_t)
corenet_udp_sendrecv_generic_if(lpr_t)
corenet_tcp_sendrecv_generic_node(lpr_t)
corenet_udp_sendrecv_generic_node(lpr_t)
corenet_tcp_sendrecv_all_ports(lpr_t)
corenet_udp_sendrecv_all_ports(lpr_t)
corenet_tcp_connect_all_ports(lpr_t)
corenet_sendrecv_all_client_packets(lpr_t)

dev_read_rand(lpr_t)
dev_read_urand(lpr_t)

domain_use_interactive_fds(lpr_t)

files_search_spool(lpr_t)
# for lpd config files (should have a new type)
files_read_etc_files(lpr_t)
# for test print
files_read_usr_files(lpr_t)
#Added to cover read_content macro
files_list_home(lpr_t)
files_read_generic_tmp_files(lpr_t)

fs_getattr_xattr_fs(lpr_t)

# Access the terminal.
term_use_controlling_term(lpr_t)
term_use_generic_ptys(lpr_t)

auth_use_nsswitch(lpr_t)

miscfiles_read_localization(lpr_t)

userdom_read_user_tmp_symlinks(lpr_t)
# Write to the user domain tty.
userdom_use_user_terminals(lpr_t)
userdom_read_user_home_content_files(lpr_t)
userdom_read_user_tmp_files(lpr_t)

tunable_policy(`use_lpd_server',`
	# lpr can run in lightweight mode, without a local print spooler.
	allow lpr_t lpd_var_run_t:dir search;
	allow lpr_t lpd_var_run_t:sock_file write;
	files_read_var_files(lpr_t)

	# Connect to lpd via a Unix domain socket.
	allow lpr_t printer_t:sock_file rw_sock_file_perms;
	allow lpr_t lpd_t:unix_stream_socket connectto;
	# Send SIGHUP to lpd.
	allow lpr_t lpd_t:process signal;

	manage_dirs_pattern(lpr_t, lpr_tmp_t, lpr_tmp_t)
	manage_files_pattern(lpr_t, lpr_tmp_t, lpr_tmp_t)
	files_tmp_filetrans(lpr_t, lpr_tmp_t, { file dir })

	manage_files_pattern(lpr_t, print_spool_t, print_spool_t)
	filetrans_pattern(lpr_t, print_spool_t, print_spool_t, file)
	# Read and write shared files in the spool directory.
	allow lpr_t print_spool_t:file rw_file_perms;

	allow lpr_t printconf_t:dir list_dir_perms;
	read_files_pattern(lpr_t, printconf_t, printconf_t)
	read_lnk_files_pattern(lpr_t, printconf_t, printconf_t)
')

tunable_policy(`use_nfs_home_dirs',`
	files_list_home(lpr_t)
	fs_list_auto_mountpoints(lpr_t)
	fs_read_nfs_files(lpr_t)
	fs_read_nfs_symlinks(lpr_t)
')

tunable_policy(`use_samba_home_dirs',`
	files_list_home(lpr_t)
	fs_list_auto_mountpoints(lpr_t)
	fs_read_cifs_files(lpr_t)
	fs_read_cifs_symlinks(lpr_t)
')

optional_policy(`
	cups_read_config(lpr_t)
	cups_stream_connect(lpr_t)
	cups_read_pid_files(lpr_t)
')

optional_policy(`
	logging_send_syslog_msg(lpr_t)
')