selinux-refpolicy/refpolicy/policy/modules/system/userdomain.if

# Copyright (C) 2005 Tresys Technology, LLC

########################################
#
# Base user domain template
#
# This is common to user and admin domain

define(`base_user_domain',`

role $1_r types $1_t;
allow system_r $1_r;

allow $1_t self:capability { setgid chown fowner };
dontaudit $1_t self:capability { sys_nice fsetid };
allow $1_t self:process ~{ ptrace setcurrent setexec setfscreate setrlimit execmem dyntransition };
allow $1_t self:process { ptrace setfscreate };
allow $1_t self:fd use;
allow $1_t self:fifo_file { read getattr lock ioctl write append };
allow $1_t self:unix_dgram_socket { create ioctl read getattr write setattr append bind connect getopt setopt shutdown };
allow $1_t self:unix_stream_socket { create ioctl read getattr write setattr append bind connect getopt setopt shutdown listen accept };
allow $1_t self:unix_dgram_socket sendto;
allow $1_t self:unix_stream_socket connectto;
allow $1_t self:shm { associate getattr setattr create destroy read write lock unix_read unix_write };
allow $1_t self:sem { associate getattr setattr create destroy read write unix_read unix_write };
allow $1_t self:msgq { associate getattr setattr create destroy read write enqueue unix_read unix_write };
allow $1_t self:msg { send receive };
dontaudit $1_t self:socket create;
# Irrelevant until we have labeled networking.
#allow $1_t self:udp_socket { sendto recvfrom };

# evolution and gnome-session try to create a netlink socket
dontaudit $1_t self:netlink_socket { create ioctl read getattr write setattr append bind connect getopt setopt shutdown };
dontaudit $1_t self:netlink_route_socket { create ioctl read getattr write setattr append bind connect getopt setopt shutdown nlmsg_read nlmsg_write };

# execute files in the home directory
allow $1_t $1_home_t:file { getattr read execute execute_no_trans };

# full control of the home directory
allow $1_t $1_home_t:file { create ioctl read getattr lock write setattr append link unlink rename relabelfrom relabelto };
allow $1_t $1_home_t:lnk_file { create read getattr setattr link unlink rename relabelfrom relabelto };
allow $1_t $1_home_t:dir { create read getattr lock setattr ioctl link unlink rename search add_name remove_name reparent write rmdir relabelfrom relabelto };
allow $1_t $1_home_t:sock_file { create ioctl read getattr lock write setattr append link unlink rename relabelfrom relabelto };
allow $1_t $1_home_t:fifo_file { create ioctl read getattr lock write setattr append link unlink rename relabelfrom relabelto };
allow $1_t $1_home_dir_t:dir { create read getattr lock setattr ioctl link unlink rename search add_name remove_name reparent write rmdir };
type_transition $1_t $1_home_dir_t:{ file lnk_file dir sock_file fifo_file } $1_home_t;

allow $1_t $1_tmp_t:file { getattr read execute execute_no_trans };

# Bind to a Unix domain socket in /tmp.
# cjp: this is combination is not checked and should be removed
allow $1_t $1_tmp_t:unix_stream_socket name_bind;

allow $1_t $1_tty_device_t:chr_file { setattr getattr read write append ioctl lock };

allow $1_t unpriv_userdomain:fd use;

# Instantiate derived domains for a number of programs.
# These derived domains encode both information about the calling
# user domain and the program, and allow us to maintain separation
# between different instances of the program being run by different
# user domains.
per_userdomain_templates($1)

kernel_read_kernel_sysctl($1_t)
kernel_get_selinuxfs_mount_point($1_t)
# Very permissive allowing every domain to see every type.
kernel_get_sysvipc_info($1_t)
# Find CDROM devices
kernel_read_device_sysctl($1_t)

corenetwork_network_tcp_on_all_interfaces($1_t)
corenetwork_network_raw_on_all_interfaces($1_t)
corenetwork_network_udp_on_all_interfaces($1_t)
corenetwork_network_tcp_on_all_nodes($1_t)
corenetwork_network_raw_on_all_nodes($1_t)
corenetwork_network_udp_on_all_nodes($1_t)
corenetwork_network_tcp_on_all_ports($1_t)
corenetwork_network_udp_on_all_ports($1_t)
corenetwork_bind_tcp_on_all_nodes($1_t)
corenetwork_bind_udp_on_all_nodes($1_t)
# allow port_t name binding for UDP because it is not very usable otherwise
corenetwork_bind_udp_on_general_port($1_t)

devices_get_input_event($1_t)
devices_read_misc($1_t)
devices_write_misc($1_t)
devices_play_sound($1_t)
devices_record_sound_input($1_t)
devices_read_sound_mixer_levels($1_t)
devices_write_sound_mixer_levels($1_t)
devices_get_random_data($1_t)
devices_get_pseudorandom_data($1_t)
# open office is looking for the following
devices_get_direct_rendering_interface_attributes($1_t)
devices_ignore_use_direct_rendering_interface($1_t)

filesystem_get_all_filesystems_quotas($1_t)
filesystem_get_all_filesystems_attributes($1_t)

# for eject
storage_get_fixed_disk_attributes($1_t)

authlogin_read_login_records($1_t)
authlogin_ignore_write_login_records($1_t)

corecommands_execute_general_programs($1_t)
corecommands_execute_system_programs($1_t)

domain_execute_all_entrypoint_programs($1_t)
domain_use_widely_inheritable_file_descriptors($1_t)

files_execute_system_config_script($1_t)
files_read_system_source_code($1_t)

# Caused by su - init scripts
init_script_ignore_use_pseudoterminal($1_t)

libraries_use_dynamic_loader($1_t)
libraries_use_shared_libraries($1_t)
libraries_execute_dynamic_loader($1_t)
libraries_execute_library_scripts($1_t)

logging_ignore_get_all_logs_attributes($1_t)

miscfiles_read_localization($1_t)
miscfiles_manage_man_page_cache($1_t)

mta_modify_mail_spool($1_t)

if (allow_execmem) {
# Allow loading DSOs that require executable stack.
allow $1_t self:process execmem;
}

if (use_nfs_home_dirs) {
filesystem_manage_nfs_directories($1_t)
filesystem_manage_nfs_files($1_t)
filesystem_manage_nfs_symbolic_links($1_t)
filesystem_manage_nfs_named_sockets($1_t)
filesystem_manage_nfs_named_pipes($1_t)
filesystem_execute_nfs_files($1_t)
}

if (use_samba_home_dirs) {
filesystem_manage_windows_network_directories($1_t)
filesystem_manage_windows_network_files($1_t)
filesystem_manage_windows_network_symbolic_links($1_t)
filesystem_manage_windows_network_named_sockets($1_t)
filesystem_manage_windows_network_named_pipes($1_t)
filesystem_execute_windows_network_files($1_t)
}

if (user_direct_mouse) {
devices_get_mouse_input($1_t)
}

if (user_ttyfile_stat) {
terminal_get_all_private_physical_terminal_attributes($1_t)
}

ifdef(`TODO',`

# When the user domain runs ps, there will be a number of access
# denials when ps tries to search /proc.  Do not audit these denials.
dontaudit $1_t domain:dir r_dir_perms;
dontaudit $1_t domain:notdevfile_class_set r_file_perms;
dontaudit $1_t domain:process { getattr getsession };
#
# Cups daemon running as user tries to write /etc/printcap
#
dontaudit $1_t usr_t:file setattr;

# Access the power device.
allow $1_t power_device_t:chr_file { getattr read write ioctl };

# Check to see if cdrom is mounted
allow $1_t mnt_t:dir { getattr search };

#
# Added to allow reading of cdrom
#
allow $1_t rpc_pipefs_t:dir getattr;
allow $1_t nfsd_fs_t:dir getattr;
allow $1_t binfmt_misc_fs_t:dir getattr;

# /initrd is left mounted, various programs try to look at it
dontaudit $1_t ramfs_t:dir getattr;

if (read_default_t) {
allow $1_t default_t:dir r_dir_perms;
allow $1_t default_t:notdevfile_class_set r_file_perms;
}

#
# Running ifconfig as a user generates the following
#
dontaudit $1_t sysctl_net_t:dir search;

dontaudit $1_t default_context_t:dir search;

r_dir_file($1_t, usercanread)

can_ypbind($1_t)

if (allow_execmod) {
# Allow text relocations on system shared libraries, e.g. libGL.
allow $1_t texrel_shlib_t:file execmod;
}

allow $1_t fs_type:dir getattr;

# old "file_browse_domain":
# Regular files/directories that are not security sensitive
dontaudit $1_t file_type - secure_file_type:dir_file_class_set getattr;
dontaudit $1_t file_type - secure_file_type:dir { read search };
# /dev
dontaudit $1_t dev_fs:dir_file_class_set getattr;
dontaudit $1_t dev_fs:dir { read search };
# /proc
dontaudit $1_t sysctl_t:dir_file_class_set getattr;
dontaudit $1_t proc_fs:dir { read search };

allow $1_t autofs_t:dir { search getattr };

can_exec($1_t, { removable_t noexattrfile } )
if (user_rw_noexattrfile) {
create_dir_file($1_t, noexattrfile)
create_dir_file($1_t, removable_t)
# Write floppies 
allow $1_t removable_device_t:blk_file rw_file_perms;
allow $1_t usbtty_device_t:chr_file write;
} else {
r_dir_file($1_t, noexattrfile)
r_dir_file($1_t, removable_t)
allow $1_t removable_device_t:blk_file r_file_perms;
}
allow $1_t usbtty_device_t:chr_file read;

# GNOME checks for usb and other devices
rw_dir_file($1_t,usbfs_t)

can_exec($1_t, noexattrfile)

# for running TeX programs
r_dir_file($1_t, tetex_data_t)
can_exec($1_t, tetex_data_t)

type $1_tmpfs_t, file_type, sysadmfile, tmpfsfile;
file_type_auto_trans($1_t, tmpfs_t, $1_tmpfs_t)
allow $1_tmpfs_t tmpfs_t:filesystem associate;

# Run programs developed by other users in the same domain.

can_resmgrd_connect($1_t)

can_ypbind($1_t)

allow $1_t var_lock_t:dir search;

# Grant permissions to access the system DBus
ifdef(`dbusd.te', `
dbusd_client(system, $1)
can_network_server_tcp($1_dbusd_t)
allow $1_dbusd_t reserved_port_t:tcp_socket name_bind;

allow $1_t system_dbusd_t:dbus { send_msg acquire_svc };
dbusd_client($1, $1)
allow $1_t $1_dbusd_t:dbus { send_msg acquire_svc };
dbusd_domain($1)
ifdef(`hald.te', `
allow $1_t hald_t:dbus send_msg;
allow hald_t $1_t:dbus send_msg;
') dnl end ifdef hald.te
') dnl end ifdef dbus.te

# Gnome pannel binds to the following
ifdef(`cups.te', `
allow $1_t { cupsd_etc_t cupsd_rw_etc_t }:file { read getattr };
')

# Connect to inetd.
ifdef(`inetd.te', `
can_tcp_connect($1_t, inetd_t)
can_udp_send($1_t, inetd_t)
can_udp_send(inetd_t, $1_t)
')

# Connect to portmap.
ifdef(`portmap.te', `can_tcp_connect($1_t, portmap_t)')

# Inherit and use sockets from inetd
ifdef(`inetd.te', `
allow $1_t inetd_t:fd use;
allow $1_t inetd_t:tcp_socket rw_stream_socket_perms;
')

ifdef(`xserver.te', `
# for /tmp/.ICE-unix
file_type_auto_trans($1_t, xdm_xserver_tmp_t, $1_tmp_t, sock_file)
allow $1_t xserver_misc_device_t:{ chr_file blk_file } rw_file_perms;
')

ifdef(`xdm.te', `
# Connect to the X server run by the X Display Manager.
can_unix_connect($1_t, xdm_t)
allow $1_t xdm_tmp_t:sock_file rw_file_perms;
allow $1_t xdm_tmp_t:dir r_dir_perms;
allow $1_t xdm_tmp_t:file { getattr read };
allow $1_t xdm_xserver_tmp_t:sock_file { read write };
allow $1_t xdm_xserver_tmp_t:dir search;
allow $1_t xdm_xserver_t:unix_stream_socket connectto;
# certain apps want to read xdm.pid file
r_dir_file($1_t, xdm_var_run_t)
allow $1_t xdm_var_lib_t:file { getattr read };
allow xdm_t $1_home_dir_t:dir getattr;
ifdef(`xauth.te', `
file_type_auto_trans(xdm_t, $1_home_dir_t, $1_xauth_home_t, file)
')

# for shared memory
allow xdm_xserver_t $1_tmpfs_t:file { read write };

')dnl end ifdef xdm.te

ifdef(`rpcd.te', `
create_dir_file($1_t, nfsd_rw_t)
')

ifdef(`cardmgr.te', `
# to allow monitoring of pcmcia status
allow $1_t cardmgr_var_run_t:file { getattr read };
')

#
# Allow graphical boot to check battery lifespan
#
ifdef(`apmd.te', `
allow $1_t apmd_t:unix_stream_socket connectto;
allow $1_t apmd_var_run_t:sock_file write;
')

ifdef(`automount.te', `
allow $1_t autofs_t:dir { search getattr };
')

ifdef(`pamconsole.te', `
allow $1_t pam_var_console_t:dir search;
')

') dnl endif TODO

')dnl end base_user_domain macro

########################################
#
# User domain template
#

define(`user_domain_template', `

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

attribute $1_file_type;

type $1_t, userdomain, unpriv_userdomain; #, web_client_domain, nscd_client_domain;
domain_make_domain($1_t)
domain_make_file_descriptors_widely_inheritable($1_t)

type $1_devpts_t; # userpty_type, user_tty_type;
terminal_make_user_pseudoterminal($1_t,$1_devpts_t)

# Type for home directory.
type $1_home_dir_t; #, home_dir_type, home_type, user_home_dir_type;
files_make_file($1_home_dir_t)

# Type for files and directories in the home directory
type $1_home_t, $1_file_type; #, home_type, user_home_type;
files_make_file($1_home_t)

type $1_tmp_t, $1_file_type; #, user_tmpfile
files_make_temporary_file($1_tmp_t)

type $1_tty_device_t; #, sysadmfile, ttyfile, user_tty_type, dev_fs;
terminal_make_physical_terminal($1_t,$1_tty_device_t)
 
##############################
#
# Local policy
#

base_user_domain($1)

allow $1_t $1_devpts_t:chr_file { setattr ioctl read getattr lock write append };
terminal_create_private_pseudoterminal($1_t,$1_devpts_t)

# Rules used to associate a homedir as a mountpoint
allow $1_home_t self:filesystem associate;
allow $1_file_type $1_home_t:filesystem associate;

# user temporary files
allow $1_t $1_tmp_t:file { create ioctl read getattr lock write setattr append link unlink rename };
allow $1_t $1_tmp_t:lnk_file { create read getattr setattr link unlink rename };
allow $1_t $1_tmp_t:dir { create read getattr lock setattr ioctl link unlink rename search add_name remove_name reparent write rmdir };
allow $1_t $1_tmp_t:sock_file { create ioctl read getattr lock write setattr append link unlink rename };
allow $1_t $1_tmp_t:fifo_file { create ioctl read getattr lock write setattr append link unlink rename };
files_create_private_tmp_data($1_t, $1_tmp_t, { file lnk_file dir sock_file fifo_file })

# privileged home directory writers
allow privhome $1_home_t:file { create ioctl read getattr lock write setattr append link unlink rename };
allow privhome $1_home_t:lnk_file { create read getattr setattr link unlink rename };
allow privhome $1_home_t:dir { create read getattr lock setattr ioctl link unlink rename search add_name remove_name reparent write rmdir };
allow privhome $1_home_t:sock_file { create ioctl read getattr lock write setattr append link unlink rename };
allow privhome $1_home_t:fifo_file { create ioctl read getattr lock write setattr append link unlink rename };
type_transition privhome $1_home_dir_t:{ file lnk_file dir sock_file fifo_file } $1_home_t;

kernel_read_system_state($1_t)
kernel_read_network_state($1_t)
kernel_read_hardware_state($1_t)

# cjp: why?
bootloader_read_kernel_symbol_table($1_t)

# port access is audited even if dac would not have allowed it, so dontaudit it here
corenetwork_ignore_bind_tcp_on_all_reserved_ports($1_t)

files_read_general_system_config($1_t)
files_list_home_directories($1_t)
files_read_general_application_resources($1_t)

init_script_read_runtime_data($1_t)
# The library functions always try to open read-write first,
# then fall back to read-only if it fails. 
init_script_ignore_write_runtime_data($1_t)

selinux_read_config($1_t)

if (user_dmesg) {
kernel_read_ring_buffer($1_t)
} else {
kernel_ignore_read_ring_buffer($1_t)
}

# Allow users to run TCP servers (bind to ports and accept connection from
# the same domain and outside users)  disabling this forces FTP passive mode
# and may change other protocols
if (user_tcp_server) {
corenetwork_bind_tcp_on_general_port($1_t)
}

# Need the following rule to allow users to run vpnc
optional_policy(`xserver.te', `
corenetwork_bind_tcp_on_xserver_port($1_t)
')

ifdef(`TODO',`

dontaudit $1_t boot_t:lnk_file read;
dontaudit $1_t boot_t:file read;

can_kerberos($1_t)

# do not audit read on disk devices
dontaudit $1_t { removable_device_t fixed_disk_device_t }:blk_file read;

ifdef(`xdm.te', `
allow xdm_t $1_home_t:lnk_file read;
allow xdm_t $1_home_t:dir search;
#
# Changing this to dontaudit should cause the .xsession-errors file to be written to /tmp
# 
dontaudit xdm_t $1_home_t:file rw_file_perms;
')dnl end ifdef xdm.te

ifdef(`ftpd.te', `
if (ftp_home_dir) {
file_type_auto_trans(ftpd_t, $1_home_dir_t, $1_home_t)
}
')dnl end ifdef ftpd

if (read_default_t) {
allow $1 default_t:dir r_dir_perms;
allow $1 default_t:notdevfile_class_set r_file_perms;
}

can_exec($1_t, usr_t)

# Read directories and files with the readable_t type.
# This type is a general type for "world"-readable files.
allow $1_t readable_t:dir r_dir_perms;
allow $1_t readable_t:notdevfile_class_set r_file_perms;

# Stat lost+found.
allow $1_t lost_found_t:dir getattr;

# Read /var, /var/spool, /var/run.
allow $1_t var_t:dir r_dir_perms;
allow $1_t var_t:notdevfile_class_set r_file_perms;
allow $1_t var_spool_t:dir r_dir_perms;
allow $1_t var_spool_t:notdevfile_class_set r_file_perms;
allow $1_t var_run_t:dir r_dir_perms;
allow $1_t var_run_t:{ file lnk_file } r_file_perms;
allow $1_t var_lib_t:dir r_dir_perms;
allow $1_t var_lib_t:file { getattr read };

# for running depmod as part of the kernel packaging process
allow $1_t modules_conf_t:file { getattr read };

# Read man directories and files.
allow $1_t man_t:dir r_dir_perms;
allow $1_t man_t:notdevfile_class_set r_file_perms;

# Allow users to rw usb devices
if (user_rw_usb) {
rw_dir_create_file($1_t,usbdevfs_t)
} else {
r_dir_file($1_t,usbdevfs_t)
}

# Read /dev directories and any symbolic links.
allow $1_t device_t:dir r_dir_perms;
allow $1_t device_t:lnk_file r_file_perms;

# Do not audit write denials to /etc/ld.so.cache.
dontaudit $1_t ld_so_cache_t:file write;

dontaudit $1_t sysadm_home_t:file { read append };

ifdef(`syslogd.te', `
# Some programs that are left in $1_t will try to connect
# to syslogd, but we do not want to let them generate log messages.
# Do not audit.
dontaudit $1_t devlog_t:sock_file { read write };
dontaudit $1_t syslogd_t:unix_dgram_socket sendto;
')

# Stop warnings about access to /dev/console
dontaudit $1_t init_t:fd use;
dontaudit $1_t initrc_t:fd use;
allow $1_t initrc_t:fifo_file write;
ifdef(`user_can_mount', `
#
#  Allow users to mount file systems like floppies and cdrom
#
mount_domain($1, $1_mount, `, fs_domain')
r_dir_file($1_t, mnt_t)
allow $1_mount_t device_t:lnk_file read;
allow $1_mount_t removable_device_t:blk_file read;
allow $1_mount_t iso9660_t:filesystem relabelfrom;
allow $1_mount_t removable_t:filesystem { mount relabelto };
allow $1_mount_t removable_t:dir mounton;
ifdef(`xdm.te', `
allow $1_mount_t xdm_t:fd use;
allow $1_mount_t xdm_t:fifo_file { read write };
')
')

') dnl end TODO
')