#
# Macros for crontab domains.
#

#
# Authors:  Jonathan Crowley (MITRE) <jonathan@mitre.org>
# Revised by Stephen Smalley <sds@epoch.ncsc.mil>
#

#
# crontab_domain(domain_prefix)
#
# Define a derived domain for the crontab program when executed by
# a user domain.  
#
# The type declaration for the executable type for this program is
# provided separately in domains/program/crontab.te. 
#
undefine(`crontab_domain')
define(`crontab_domain',`
# Derived domain based on the calling user domain and the program.
type $1_crontab_t, domain, privlog;

# Transition from the user domain to the derived domain.
domain_auto_trans($1_t, crontab_exec_t, $1_crontab_t)

can_ps($1_t, $1_crontab_t)

# for ^Z
allow $1_t $1_crontab_t:process signal;

# The user role is authorized for this domain.
role $1_r types $1_crontab_t;

uses_shlib($1_crontab_t)
allow $1_crontab_t etc_t:file { getattr read };
allow $1_crontab_t self:unix_stream_socket create_socket_perms;
allow $1_crontab_t self:unix_dgram_socket create_socket_perms;
read_locale($1_crontab_t)

# Use capabilities dac_override is to create the file in the directory
# under /tmp
allow $1_crontab_t $1_crontab_t:capability { setuid setgid chown dac_override };

# Type for temporary files.
file_type_auto_trans($1_crontab_t, tmp_t, $1_tmp_t, { dir file })

# Use the type when creating files in /var/spool/cron.
allow sysadm_crontab_t $1_cron_spool_t:file { getattr read };
allow $1_crontab_t { var_t var_spool_t }:dir { getattr search };
file_type_auto_trans($1_crontab_t, cron_spool_t, $1_cron_spool_t, file)
allow $1_crontab_t self:process { fork signal_perms };
ifdef(`fcron.te', `
# fcron wants an instant update of a crontab change for the administrator
# also crontab does a security check for crontab -u
ifelse(`$1', `sysadm', `
allow $1_crontab_t crond_t:process signal;
can_setfscreate($1_crontab_t)
', `
dontaudit $1_crontab_t crond_t:process signal;
')dnl end ifelse
')dnl end ifdef fcron

# for the checks used by crontab -u
dontaudit $1_crontab_t security_t:dir search;
allow $1_crontab_t proc_t:dir search;
allow $1_crontab_t proc_t:{ file lnk_file } { getattr read };
allow $1_crontab_t selinux_config_t:dir search;
allow $1_crontab_t selinux_config_t:file { getattr read };
dontaudit $1_crontab_t self:dir search;

# crontab signals crond by updating the mtime on the spooldir
allow $1_crontab_t cron_spool_t:dir setattr;
# Allow crond to read those crontabs in cron spool.
allow crond_t $1_cron_spool_t:file r_file_perms;

# Run helper programs as $1_t
allow $1_crontab_t { bin_t sbin_t }:dir search;
allow $1_crontab_t bin_t:lnk_file read;
domain_auto_trans($1_crontab_t, { bin_t sbin_t shell_exec_t }, $1_t)

# Read user crontabs 
allow $1_crontab_t { $1_home_t $1_home_dir_t }:dir r_dir_perms;  
allow $1_crontab_t $1_home_t:file r_file_perms;  
dontaudit $1_crontab_t $1_home_dir_t:dir write;

# Access the cron log file.
allow $1_crontab_t crond_log_t:file r_file_perms;
allow $1_crontab_t crond_log_t:file append;

# Access terminals.
allow $1_crontab_t device_t:dir search;
access_terminal($1_crontab_t, $1);

allow $1_crontab_t fs_t:filesystem getattr;

# Inherit and use descriptors from gnome-pty-helper.
ifdef(`gnome-pty-helper.te', `allow $1_crontab_t $1_gph_t:fd use;')
allow $1_crontab_t privfd:fd use;

dontaudit $1_crontab_t var_run_t:dir search;
')