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

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

## <summary>

##	The per user domain 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">

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

##	is the prefix for user_t).

## </param>

## <param name="user_domain">

##	The type of the user domain.

## </param>

## <param name="user_role">

##	The role associated with the user domain.

## </param>

#

template(`cron_per_userdomain_template',`

	# 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; # user_crond_domain;

	domain_type($1_crond_t);

	corecmd_shell_entry_type($1_crond_t)

	role $3 types $1_crond_t;

	type $1_crontab_t;

	domain_type($1_crontab_t)

	domain_entry_file($1_crontab_t,crontab_exec_t)

	role $3 types $1_crontab_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_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_sysctl($1_crond_t)

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

	bootloader_dontaudit_search_boot($1_crond_t)

	corenet_tcp_sendrecv_all_if($1_crond_t)

	corenet_raw_sendrecv_all_if($1_crond_t)

	corenet_udp_sendrecv_all_if($1_crond_t)

	corenet_tcp_sendrecv_all_nodes($1_crond_t)

	corenet_raw_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_bind_all_nodes($1_crond_t)

	corenet_udp_bind_all_nodes($1_crond_t)

	dev_read_urand($1_crond_t)

	fs_getattr_all_fs($1_crond_t)

	domain_exec_all_entry_files($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)

	corecmd_exec_bin($1_crond_t)

	corecmd_exec_sbin($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)

	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_files($1,$1_crond_t)

	tunable_policy(`fcron_crond', `

		allow crond_t $1_cron_spool_t:file create_file_perms;

	')

	optional_policy(`nis.te',`

		nis_use_ypbind($1_crond_t)

	')

	ifdef(`TODO',`

	# Access user files and dirs.

	file_type_auto_trans($1_crond_t, $1_home_dir_t, $1_home_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 r_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;

	')

	allow $1_crond_t var_spool_t:dir search;

	allow $1_crond_t var_t:dir r_dir_perms;

	allow $1_crond_t var_t:file r_file_perms;

	# quiet other ps operations

	dontaudit $1_crond_t domain:dir { getattr search };

	') dnl endif TODO

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

	#

	# $1_crontab_t local policy

	#

	# Transition from the user domain to the derived domain.

	domain_auto_trans($2, crontab_exec_t, $1_crontab_t)

	allow $2 $1_crontab_t:fd use;

	allow $1_crontab_t $2:fd use;

	allow $1_crontab_t $2:fifo_file rw_file_perms;

	allow $1_crontab_t $2:process sigchld;

	# 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 r_file_perms;

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

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

	allow $1_crontab_t self:process signal_perms;

	# create files in /var/spool/cron

	allow $1_crontab_t $1_cron_spool_t:file create_file_perms;

	allow $1_crontab_t cron_spool_t:dir rw_dir_perms;

	type_transition $1_crontab_t $1_cron_spool_t:file system_crond_tmp_t;

	# crontab signals crond by updating the mtime on the spooldir

	allow $1_crontab_t cron_spool_t:dir setattr;

	allow $1_crontab_t crond_log_t:file ra_file_perms;

	# 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_sbin_domtrans($1_crontab_t,$2)

	corecmd_shell_domtrans($1_crontab_t,$2)

	domain_use_wide_inherit_fd($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_dontaudit_search_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_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;

	')

	ifdef(`TODO',`

	can_ps($1_t, $1_crontab_t)

	dontaudit $1_crontab_t proc_t:dir search;

	allow $1_crond_t tmp_t:dir rw_dir_perms;

	type_transition $1_crond_t $1_tmp_t:{ file dir } $1_tmp_t;

	# Read user crontabs

	allow $1_crontab_t { $1_home_t $1_home_dir_t }:dir r_dir_perms;  

	dontaudit $1_crontab_t $1_home_dir_t:dir write;

	# Inherit and use descriptors from gnome-pty-helper.

	ifdef(`gnome-pty-helper.te', `allow $1_crontab_t $1_gph_t:fd use;')

	') 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">

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

##	is the prefix for user_t).

## </param>

#

template(`cron_admin_template',`

	# 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">

##	The type of the process to transition to.

## </param>

## <param name="entrypoint">

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

## </param>

#

interface(`cron_system_entry',`

	gen_require(`

		type crond_t, system_crond_t;

		class fd use;

		class fifo_file rw_file_perms;

		class process sigchld;

	')

	domain_auto_trans(system_crond_t, $2, $1)

	# cjp: perhaps these four rules from the old

	# domain_auto_trans are not needed?

	allow system_crond_t $1:fd use;

	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 { getattr read write ioctl };

	allow $1 crond_t:fd use;

	allow $1 crond_t:process sigchld;

')

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

## <summary>

##	Send a SIGCHLD signal to the cron daemon.

## </summary>

## <param name="domain">

##	Domain allowed access.

## </param>

#

interface(`cron_sigchld',`

	gen_require(`

		type crond_t;

		class process sigchld;

	')

	allow $1 crond_t:process sigchld;

')

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

## <summary>

##	Read a cron daemon unnamed pipe

## </summary>

## <param name="domain">

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

## </param>

#

interface(`cron_read_pipe',`

	gen_require(`

		type crond_t;

		class file r_file_perms;

	')

	allow $1 crond_t:file r_file_perms;

')

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

## <summary>

##	Read and write the cron daemon log files.

## </summary>

## <param name="domain">

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

## </param>

#

interface(`cron_rw_log',`

	gen_require(`

		type crond_log_t;

		class file rw_file_perms;

	')

	logging_search_logs($1)

	allow $1 crond_log_t:file rw_file_perms;

')

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

## <summary>

##	Search the directory containing user cron tables.

## </summary>

## <param name="domain">

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

## </param>

#

interface(`cron_search_spool',`

	gen_require(`

		type cron_spool_t;

		class dir search;

	')

	files_search_spool($1)

	allow $1 cron_spool_t:dir search;

')

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

## <summary>

##	Read temporary files from the system cron jobs.

## </summary>

## <param name="domain">

##	Domain allowed access.

## </param>

#

interface(`cron_read_system_job_tmp_files',`

	gen_require(`

		type system_crond_tmp_t;

		class file r_file_perms;

	')

	files_search_tmp($1)

	allow $1 system_crond_tmp_t:file r_file_perms;

')