## <summary>Periodic execution of scheduled commands.</summary>

#######################################

## <summary>

##	The per role template for the cron module.

## </summary>

## <desc>

##	

##	This template creates a derived domains which are used

##	for running programs on behalf of the user, from cron.

##	A type for the user crontab is also created.

##	

##	

##	This template is invoked automatically for each user, and

##	generally does not need to be invoked directly

##	by policy writers.

##	

## </desc>

## <param name="userdomain_prefix">

##	<summary>

##	The prefix of the user domain (e.g., user

##	is the prefix for user_t).

##	</summary>

## </param>

## <param name="user_domain">

##	<summary>

##	The type of the user domain.

##	</summary>

## </param>

## <param name="user_role">

##	<summary>

##	The role associated with the user domain.

##	</summary>

## </param>

#

template(`cron_per_role_template',`

	gen_require(`

		attribute cron_spool_type;

		type crond_t, cron_spool_t, crontab_exec_t;

	')

	# Type of user crontabs once moved to cron spool.

	type $1_cron_spool_t, cron_spool_type;

	files_type($1_cron_spool_t)

	type $1_crond_t;

	domain_type($1_crond_t)

	domain_cron_exemption_target($1_crond_t)

	corecmd_shell_entry_type($1_crond_t)

	role $3 types $1_crond_t;

	type $1_crontab_t;

	application_domain($1_crontab_t,crontab_exec_t)

	role $3 types $1_crontab_t;

	type $1_crontab_tmp_t;

	files_tmp_file($1_crontab_tmp_t)

	##############################

	#

	# $1_crond_t local policy

	#

	allow $1_crond_t self:capability dac_override;

	allow $1_crond_t self:process { signal_perms setsched };

	allow $1_crond_t self:fifo_file rw_fifo_file_perms;

	allow $1_crond_t self:unix_stream_socket create_stream_socket_perms;

	allow $1_crond_t self:unix_dgram_socket create_socket_perms;

	# The entrypoint interface is not used as this is not

	# a regular entrypoint.  Since crontab files are

	# not directly executed, crond must ensure that

	# the crontab file has a type that is appropriate

	# for the domain of the user cron job.  It

	# performs an entrypoint permission check

	# for this purpose.

	allow $1_crond_t $1_cron_spool_t:file entrypoint;

	# Permit a transition from the crond_t domain to this domain.

	# The transition is requested explicitly by the modified crond 

	# via setexeccon.  There is no way to set up an automatic

	# transition, since crontabs are configuration files, not executables.

	allow crond_t $1_crond_t:process transition;

	dontaudit crond_t $1_crond_t:process { noatsecure siginh rlimitinh };

	allow crond_t $1_crond_t:fd use;

	allow $1_crond_t crond_t:fd use;

	allow $1_crond_t crond_t:fifo_file rw_file_perms;

	allow $1_crond_t crond_t:process sigchld;

	kernel_read_system_state($1_crond_t)

	kernel_read_kernel_sysctls($1_crond_t)

	# ps does not need to access /boot when run from cron

	files_dontaudit_search_boot($1_crond_t)

	corenet_all_recvfrom_unlabeled($1_crond_t)

	corenet_all_recvfrom_netlabel($1_crond_t)

	corenet_tcp_sendrecv_all_if($1_crond_t)

	corenet_udp_sendrecv_all_if($1_crond_t)

	corenet_tcp_sendrecv_all_nodes($1_crond_t)

	corenet_udp_sendrecv_all_nodes($1_crond_t)

	corenet_tcp_sendrecv_all_ports($1_crond_t)

	corenet_udp_sendrecv_all_ports($1_crond_t)

	corenet_tcp_connect_all_ports($1_crond_t)

	corenet_sendrecv_all_client_packets($1_crond_t)

	dev_read_urand($1_crond_t)

	fs_getattr_all_fs($1_crond_t)

	corecmd_exec_all_executables($1_crond_t)

	# quiet other ps operations

	domain_dontaudit_read_all_domains_state($1_crond_t)

	domain_dontaudit_getattr_all_domains($1_crond_t)

	files_read_usr_files($1_crond_t)

	files_exec_etc_files($1_crond_t)

	# for nscd:

	files_dontaudit_search_pids($1_crond_t)

	libs_use_ld_so($1_crond_t)

	libs_use_shared_libs($1_crond_t)

	libs_exec_lib_files($1_crond_t)

	libs_exec_ld_so($1_crond_t)

	files_read_etc_runtime_files($1_crond_t)

	files_read_var_files($1_crond_t)

	files_search_spool($1_crond_t)

	logging_search_logs($1_crond_t)

	seutil_read_config($1_crond_t)

	miscfiles_read_localization($1_crond_t)

	userdom_manage_user_tmp_files($1,$1_crond_t)

	userdom_manage_user_tmp_symlinks($1,$1_crond_t)

	userdom_manage_user_tmp_pipes($1,$1_crond_t)

	userdom_manage_user_tmp_sockets($1,$1_crond_t)

	# Run scripts in user home directory and access shared libs.

	userdom_exec_user_home_content_files($1,$1_crond_t)

	# Access user files and dirs.

#	userdom_manage_user_home_subdir_dirs($1,$1_crond_t)

	userdom_manage_user_home_content_files($1,$1_crond_t)

	userdom_manage_user_home_content_symlinks($1,$1_crond_t)

	userdom_manage_user_home_content_pipes($1,$1_crond_t)

	userdom_manage_user_home_content_sockets($1,$1_crond_t)

#	userdom_user_home_dir_filetrans_user_home_content($1,$1_crond_t,notdevfile_class_set)

	tunable_policy(`fcron_crond', `

		allow crond_t $1_cron_spool_t:file manage_file_perms;

	')

	# need a per-role version of this:

	#optional_policy(`

	#	mono_domtrans($1_crond_t)

	#')

	optional_policy(`

		dbus_stub($1_crond_t)

		allow $1_crond_t $2:dbus send_msg;

	')		

	optional_policy(`

		nis_use_ypbind($1_crond_t)

	')

	ifdef(`TODO',`

	optional_policy(`

		create_dir_file($1_crond_t, httpd_$1_content_t)

	')

	allow $1_crond_t tmp_t:dir rw_dir_perms;

	type_transition $1_crond_t $1_tmp_t:{ file lnk_file sock_file fifo_file } $1_tmp_t;

	ifdef(`mta.te', `

		domain_auto_trans($1_crond_t, sendmail_exec_t, $1_mail_t)

		allow $1_crond_t sendmail_exec_t:lnk_file read_lnk_file_perms;

		# $1_mail_t should only be reading from the cron fifo not needing to write

		dontaudit $1_mail_t crond_t:fifo_file write;

		allow mta_user_agent $1_crond_t:fd use;

	')

	') dnl endif TODO

	##############################

	#

	# $1_crontab_t local policy

	#

	# dac_override is to create the file in the directory under /tmp

	allow $1_crontab_t self:capability { fowner setuid setgid chown dac_override };

	allow $1_crontab_t self:process signal_perms;

	# Transition from the user domain to the derived domain.

	domtrans_pattern($2, crontab_exec_t, $1_crontab_t)

	# crontab shows up in user ps

	ps_process_pattern($2,$1_crontab_t)

	# for ^Z

	allow $2 $1_crontab_t:process signal;

	# Allow crond to read those crontabs in cron spool.

	allow crond_t $1_cron_spool_t:file manage_file_perms;

	allow $1_crontab_t $1_crontab_tmp_t:file manage_file_perms;

	files_tmp_filetrans($1_crontab_t,$1_crontab_tmp_t,file)

	# create files in /var/spool/cron

	manage_files_pattern($1_crontab_t,cron_spool_t,$1_cron_spool_t)

	filetrans_pattern($1_crontab_t,cron_spool_t,$1_cron_spool_t,file)

	files_search_spool($1_crontab_t)

	# crontab signals crond by updating the mtime on the spooldir

	allow $1_crontab_t cron_spool_t:dir setattr;

	kernel_read_system_state($1_crontab_t)

	# for the checks used by crontab -u

	selinux_dontaudit_search_fs($1_crontab_t)

	fs_getattr_xattr_fs($1_crontab_t)

	# Run helper programs as the user domain

	corecmd_bin_domtrans($1_crontab_t,$2)

	corecmd_shell_domtrans($1_crontab_t,$2)

	domain_use_interactive_fds($1_crontab_t)

	files_read_etc_files($1_crontab_t)

	files_dontaudit_search_pids($1_crontab_t)

	libs_use_ld_so($1_crontab_t)

	libs_use_shared_libs($1_crontab_t)

	logging_send_syslog_msg($1_crontab_t)

	miscfiles_read_localization($1_crontab_t)

	seutil_read_config($1_crontab_t)

	userdom_manage_user_tmp_dirs($1,$1_crontab_t)

	userdom_manage_user_tmp_files($1,$1_crontab_t)

	# Access terminals.

	userdom_use_user_terminals($1,$1_crontab_t)

	# Read user crontabs

	userdom_read_user_home_content_files($1,$1_crontab_t)

	tunable_policy(`fcron_crond',`

		# fcron wants an instant update of a crontab change for the administrator

		# also crontab does a security check for crontab -u

		dontaudit $1_crontab_t crond_t:process signal;

	')

	optional_policy(`

		nscd_socket_use($1_crontab_t)

	')

	ifdef(`TODO',`

	# Read user crontabs

	dontaudit $1_crontab_t $1_home_dir_t:dir write;

	') dnl endif TODO

')

#######################################

## <summary>

##	The administrative functions template for the cron module.

## </summary>

## <desc>

##	

##	This template creates rules for administrating the cron service,

##	allowing the specified user to manage other user crontabs.

##	

## </desc>

## <param name="userdomain_prefix">

##	<summary>

##	The prefix of the user domain (e.g., user

##	is the prefix for user_t).

##	</summary>

## </param>

## <rolecap/>

#

template(`cron_admin_template',`

	gen_require(`

		attribute cron_spool_type;

		type $1_crontab_t, $1_crond_t;

	')

	# Allow our crontab domain to unlink a user cron spool file.

	allow $1_crontab_t cron_spool_type:file { getattr read unlink };

	logging_read_generic_logs($1_crond_t)

	# Manipulate other users crontab.

	selinux_get_fs_mount($1_crontab_t)

	selinux_validate_context($1_crontab_t)

	selinux_compute_access_vector($1_crontab_t)

	selinux_compute_create_context($1_crontab_t)

	selinux_compute_relabel_context($1_crontab_t)

	selinux_compute_user_contexts($1_crontab_t)

	tunable_policy(`fcron_crond', `

		# fcron wants an instant update of a crontab change for the administrator

		# also crontab does a security check for crontab -u

		allow $1_crontab_t self:process setfscreate;

		selinux_get_fs_mount($1_crontab_t)

	')

')

########################################

## <summary>

##	Make the specified program domain accessable

##	from the system cron jobs.

## </summary>

## <param name="domain">

##	<summary>

##	The type of the process to transition to.

##	</summary>

## </param>

## <param name="entrypoint">

##	<summary>

##	The type of the file used as an entrypoint to this domain.

##	</summary>

## </param>

#

interface(`cron_system_entry',`

	gen_require(`

		type crond_t, system_crond_t;

	')

	domain_auto_trans(system_crond_t, $2, $1)

	# cjp: perhaps these four rules from the old

	# domain_auto_trans are not needed?

	allow $1 system_crond_t:fd use;

	allow $1 system_crond_t:fifo_file rw_file_perms;

	allow $1 system_crond_t:process sigchld;

	allow $1 crond_t:fifo_file rw_file_perms;

	allow $1 crond_t:fd use;

	allow $1 crond_t:process sigchld;

	role system_r types $1;

')

########################################

## <summary>

##	Inherit and use a file descriptor

##	from the cron daemon.

## </summary>

## <param name="domain">

##	<summary>

##	Domain allowed access.

##	</summary>

## </param>

#

interface(`cron_use_fds',`

	gen_require(`

		type crond_t;

	')

	allow $1 crond_t:fd use;

')

########################################

## <summary>

##	Send a SIGCHLD signal to the cron daemon.

## </summary>

## <param name="domain">

##	<summary>

##	Domain allowed access.

##	</summary>

## </param>

#

interface(`cron_sigchld',`

	gen_require(`

		type crond_t;

	')

	allow $1 crond_t:process sigchld;

')

########################################

## <summary>

##	Read a cron daemon unnamed pipe.

## </summary>

## <param name="domain">

##	<summary>

##	Domain allowed access.

##	</summary>

## </param>

#

interface(`cron_read_pipes',`

	gen_require(`

		type crond_t;

	')

	allow $1 crond_t:fifo_file read_fifo_file_perms;

')

########################################

## <summary>

##	Do not audit attempts to write cron daemon unnamed pipes.

## </summary>

## <param name="domain">

##	<summary>

##	Domain allowed access.

##	</summary>

## </param>

#

interface(`cron_dontaudit_write_pipes',`

	gen_require(`

		type crond_t;

	')

	dontaudit $1 crond_t:fifo_file write;

')

########################################

## <summary>

##	Read and write a cron daemon unnamed pipe.

## </summary>

## <param name="domain">

##	<summary>

##	Domain allowed access.

##	</summary>

## </param>

#

interface(`cron_rw_pipes',`

	gen_require(`

		type crond_t;

	')

	allow $1 crond_t:fifo_file { getattr read write };

')

########################################

## <summary>

##	Read, and write cron daemon TCP sockets.

## </summary>

## <param name="domain">

##	<summary>

##	Domain allowed access.

##	</summary>

## </param>

#

interface(`cron_rw_tcp_sockets',`

	gen_require(`

		type crond_t;

	')

	allow $1 crond_t:tcp_socket { read write };

')

########################################

## <summary>

##	Search the directory containing user cron tables.

## </summary>

## <param name="domain">

##	<summary>

##	The type of the process to performing this action.

##	</summary>

## </param>

#

interface(`cron_search_spool',`

	gen_require(`

		type cron_spool_t;

	')

	files_search_spool($1)

	allow $1 cron_spool_t:dir search_dir_perms;

')

########################################

## <summary>

##	Execute anacron in the cron system domain.

## </summary>

## <param name="domain">

##	<summary>

##	Domain allowed access.

##	</summary>

## </param>

#

interface(`cron_anacron_domtrans_system_job',`

	gen_require(`

		type system_crond_t, anacron_exec_t;

	')

	domtrans_pattern($1,anacron_exec_t,system_crond_t)

')

########################################

## <summary>

##	Inherit and use a file descriptor

##	from system cron jobs.

## </summary>

## <param name="domain">

##	<summary>

##	Domain allowed access.

##	</summary>

## </param>

#

interface(`cron_use_system_job_fds',`

	gen_require(`

		type system_crond_t;

	')

	allow $1 system_crond_t:fd use;

')

########################################

## <summary>

##	Write a system cron job unnamed pipe.

## </summary>

## <param name="domain">

##	<summary>

##	Domain allowed access.

##	</summary>

## </param>

#

interface(`cron_write_system_job_pipes',`

	gen_require(`

		type system_crond_t;

	')

	allow $1 system_crond_t:file write;

')

########################################

## <summary>

##	Read and write a system cron job unnamed pipe.

## </summary>

## <param name="domain">

##	<summary>

##	Domain allowed access.

##	</summary>

## </param>

#

interface(`cron_rw_system_job_pipes',`

	gen_require(`

		type system_crond_t;

	')

	allow $1 system_crond_t:fifo_file rw_fifo_file_perms;

')

########################################

## <summary>

##	Read temporary files from the system cron jobs.

## </summary>

## <param name="domain">

##	<summary>

##	Domain allowed access.

##	</summary>

## </param>

#

interface(`cron_read_system_job_tmp_files',`

	gen_require(`

		type system_crond_tmp_t;

	')

	files_search_tmp($1)

	allow $1 system_crond_tmp_t:file read_file_perms;

')

########################################

## <summary>

##	Do not audit attempts to append temporary

##	files from the system cron jobs.

## </summary>

## <param name="domain">

##	<summary>

##	Domain to not audit.

##	</summary>

## </param>

#

interface(`cron_dontaudit_append_system_job_tmp_files',`

	gen_require(`

		type system_crond_tmp_t;

	')

	dontaudit $1 system_crond_tmp_t:file append;

')