selinux-policy/strict/macros/admin_macros.te

#
# Macros for all admin domains.
#

#
# admin_domain(domain_prefix)
#
# Define derived types and rules for an administrator domain.
#
# The type declaration and role authorization for the domain must be
# provided separately.  Likewise, domain transitions into this domain
# must be specified separately.  If the every_domain() rules are desired,
# then these rules must also be specified separately.
#
undefine(`admin_domain')
define(`admin_domain',`
# Type for home directory.
attribute $1_file_type;
type $1_home_dir_t, file_type, sysadmfile, home_dir_type, home_type;
type $1_home_t, file_type, sysadmfile, home_type, $1_file_type;

# Type and access for pty devices.
can_create_pty($1)

tmp_domain($1, `, $1_file_type', `{ file dir lnk_file sock_file fifo_file }')

# Type for tty devices.
type $1_tty_device_t, sysadmfile, ttyfile, dev_fs;

# Inherit rules for ordinary users.
base_user_domain($1)

allow $1_t self:capability setuid;

ifdef(`su.te', `su_domain($1)')
ifdef(`userhelper.te', `userhelper_domain($1)')
ifdef(`sudo.te', `sudo_domain($1)')

# Violates the goal of limiting write access to checkpolicy.
# But presently necessary for installing the file_contexts file.
create_dir_file($1_t, policy_config_t)
r_dir_file($1_t, selinux_config_t)

# Let admin stat the shadow file.
allow $1_t shadow_t:file getattr;

ifdef(`crond.te', `
allow $1_crond_t var_log_t:file r_file_perms;
')

# Allow system log read
allow $1_t kernel_t:system syslog_read;

# Use capabilities other than sys_module.
allow $1_t self:capability ~sys_module;

# Get security policy decisions.
can_getsecurity($1_t)

# Use system operations.
allow $1_t kernel_t:system *;

# Set password information for other users.
allow $1_t self:passwd { passwd chfn chsh };

# Skip authentication when pam_rootok is specified.
allow $1_t self:passwd rootok;

# Manipulate other user crontab.
allow $1_t self:passwd crontab;
can_getsecurity(sysadm_crontab_t)

# Change system parameters.
can_sysctl($1_t)

# Create and use all files that have the sysadmfile attribute.
allow $1_t sysadmfile:{ file sock_file fifo_file } create_file_perms;
allow $1_t sysadmfile:lnk_file create_lnk_perms;
allow $1_t sysadmfile:dir create_dir_perms;

# for lsof
allow $1_t mtrr_device_t:file getattr;
allow $1_t fs_type:dir getattr;

# Set an exec context, e.g. for runcon.
can_setexec($1_t)

# Set a context other than the default one for newly created files.
can_setfscreate($1_t)

# Access removable devices.
allow $1_t removable_device_t:devfile_class_set rw_file_perms;

# Communicate with the init process.
allow $1_t initctl_t:fifo_file rw_file_perms;

# Examine all processes.
can_ps($1_t, domain)

# allow renice
allow $1_t domain:process setsched;

# Send signals to all processes.
allow $1_t { domain unlabeled_t }:process signal_perms;

# Access all user terminals.
allow $1_t tty_device_t:chr_file rw_file_perms;
allow $1_t ttyfile:chr_file rw_file_perms;
allow $1_t ptyfile:chr_file rw_file_perms;
allow $1_t serial_device:chr_file setattr;

# allow setting up tunnels
allow $1_t tun_tap_device_t:chr_file rw_file_perms;

# run ls -l /dev
allow $1_t device_t:dir r_dir_perms;
allow $1_t { device_t device_type }:{ chr_file blk_file } getattr;
allow $1_t ptyfile:chr_file getattr;

# Run programs from staff home directories.
# Not ideal, but typical if users want to login as both sysadm_t or staff_t.
can_exec($1_t, staff_home_t)

# Run programs from /usr/src.
can_exec($1_t, src_t)

# Run admin programs that require different permissions in their own domain.
# These rules were moved into the appropriate program domain file.

# added by mayerf@tresys.com
# The following rules are temporary until such time that a complete
# policy management infrastructure is in place so that an administrator
# cannot directly manipulate policy files with arbitrary programs.
#
allow $1_t policy_src_t:file create_file_perms;
allow $1_t policy_src_t:lnk_file create_lnk_perms;
allow $1_t policy_src_t:dir create_dir_perms;

# Relabel all files.
# Actually this will not allow relabeling ALL files unless you change
# sysadmfile to file_type (and change the assertion in assert.te that
# only auth_write can relabel shadow_t)
allow $1_t sysadmfile:dir { getattr read search relabelfrom relabelto };
allow $1_t sysadmfile:notdevfile_class_set { getattr relabelfrom relabelto };

ifdef(`startx.te', `
ifdef(`xserver.te', `
# Create files in /tmp/.X11-unix with our X servers derived
# tmp type rather than user_xserver_tmp_t.
file_type_auto_trans($1_xserver_t, xserver_tmpfile, $1_xserver_tmp_t, sock_file)
')dnl end xserver.te
')dnl end startx.te

ifdef(`xdm.te', `
ifdef(`xauth.te', `
if (xdm_sysadm_login) {
allow xdm_t $1_home_t:lnk_file read;
allow xdm_t $1_home_t:dir search;
}
allow $1_t xdm_t:fifo_file rw_file_perms;
')dnl end ifdef xauth.te
')dnl end ifdef xdm.te

#
# A user who is authorized for sysadm_t may nonetheless have
# a home directory labeled with user_home_t if the user is expected
# to login in either user_t or sysadm_t.  Hence, the derived domains
# for programs need to be able to access user_home_t.  
# 

# Allow our gph domain to write to .xsession-errors.
ifdef(`gnome-pty-helper.te', `
allow $1_gph_t user_home_dir_type:dir rw_dir_perms;
allow $1_gph_t user_home_type:file create_file_perms;
')

# Allow our crontab domain to unlink a user cron spool file.
ifdef(`crontab.te',
`allow $1_crontab_t user_cron_spool_t:file unlink;')

# for the administrator to run TCP servers directly
can_tcp_connect($1_t, $1_t)
allow $1_t port_t:tcp_socket name_bind;

# Connect data port to ftpd.
ifdef(`ftpd.te', `can_tcp_connect(ftpd_t, $1_t)')

# Connect second port to rshd.
ifdef(`rshd.te', `can_tcp_connect(rshd_t, $1_t)')

#
# Allow sysadm to execute quota commands against filesystems and files.
#
allow $1_t fs_type:filesystem quotamod;

# Grant read and write access to /dev/console.
allow $1_t console_device_t:chr_file rw_file_perms;

# Allow MAKEDEV to work
allow $1_t device_t:dir rw_dir_perms;
allow $1_t device_type:{ blk_file chr_file } { create unlink rename };
allow $1_t device_t:lnk_file { create read };

# for lsof
allow $1_t domain:socket_class_set getattr;
allow $1_t eventpollfs_t:file getattr;
')