selinux-policy/refpolicy/policy/modules/system/locallogin.te

# Copyright (C) 2005 Tresys Technology, LLC

policy_module(locallogin,1.0)

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

type local_login_t; #, privuser, privrole, auth_chkpwd, privowner, nscd_client_domain;
domain_make_domain(local_login_t)
authlogin_make_login_program_entrypoint(local_login_t)
domain_make_file_descriptors_widely_inheritable(local_login_t)
role system_r types local_login_t;

type local_login_tmp_t;
files_make_file(local_login_tmp_t)

########################################
#
# Local policy
#

allow local_login_t self:capability { dac_override chown fowner fsetid kill setgid setuid net_bind_service sys_nice sys_resource sys_tty_config };
allow local_login_t self:process ~{ ptrace setcurrent setexec setfscreate setrlimit execmem dyntransition };
allow local_login_t self:process { setrlimit setexec };
allow local_login_t self:fd use;
allow local_login_t self:fifo_file { read getattr lock ioctl write append };
allow local_login_t self:unix_dgram_socket { create ioctl read getattr write setattr append bind connect getopt setopt shutdown };
allow local_login_t self:unix_stream_socket { create ioctl read getattr write setattr append bind connect getopt setopt shutdown listen accept };
allow local_login_t self:unix_dgram_socket sendto;
allow local_login_t self:unix_stream_socket connectto;
allow local_login_t self:shm { associate getattr setattr create destroy read write lock unix_read unix_write };
allow local_login_t self:sem { associate getattr setattr create destroy read write unix_read unix_write };
allow local_login_t self:msgq { associate getattr setattr create destroy read write enqueue unix_read unix_write };
allow local_login_t self:msg { send receive };

allow local_login_t local_login_tmp_t:dir { create read getattr lock setattr ioctl link unlink rename search add_name remove_name reparent write rmdir };
allow local_login_t local_login_tmp_t:file { create ioctl read getattr lock write setattr append link unlink rename };
files_create_private_tmp_data(local_login_t, local_login_tmp_t, { file dir })

kernel_read_system_state(local_login_t)
kernel_read_kernel_sysctl(local_login_t)
kernel_get_selinuxfs_mount_point(local_login_t)
kernel_validate_selinux_context(local_login_t)
kernel_compute_selinux_av(local_login_t)
kernel_compute_create(local_login_t)
kernel_compute_relabel(local_login_t)
kernel_compute_reachable_user_contexts(local_login_t)

# for SSP/ProPolice
devices_get_pseudorandom_data(local_login_t)

terminal_use_all_users_physical_terminals(local_login_t)
terminal_use_general_physical_terminal(local_login_t)

init_script_modify_runtime_data(local_login_t)
init_ignore_use_file_descriptors(local_login_t)

domain_read_all_entrypoint_programs(local_login_t)

files_read_general_system_config(local_login_t)
files_read_runtime_system_config(local_login_t)
files_list_home_directories(local_login_t)
files_read_general_application_resources(local_login_t)

libraries_use_dynamic_loader(local_login_t)
libraries_read_shared_libraries(local_login_t)

logging_send_system_log_message(local_login_t)

selinux_read_config(local_login_t)
selinux_read_default_contexts(local_login_t)

authlogin_ignore_read_shadow_passwords(local_login_t)
authlogin_modify_login_records(local_login_t)
authlogin_modify_last_login_log(local_login_t)
authlogin_pam_execute(local_login_t)
authlogin_pam_console_manage_runtime_data(local_login_t)

miscfiles_read_localization(local_login_t)

ifdef(`TODO',`
allow local_login_t unpriv_userdomain:fd use;
can_ypbind(local_login_t)
ifdef(`automount.te', `
allow local_login_t autofs_t:dir { search getattr };
')

allow local_login_t bin_t:dir r_dir_perms;
allow local_login_t bin_t:notdevfile_class_set r_file_perms;
allow local_login_t sbin_t:dir r_dir_perms;
allow local_login_t sbin_t:notdevfile_class_set r_file_perms;
if (read_default_t) {
allow local_login_t default_t:dir r_dir_perms;
allow local_login_t default_t:notdevfile_class_set r_file_perms;
}

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

# Read /var, /var/spool
allow local_login_t { var_t var_spool_t }:dir search;

# for when /var/mail is a sym-link
allow local_login_t var_t:lnk_file read;

# Read /dev directories and any symbolic links.
allow local_login_t device_t:lnk_file r_file_perms;

dontaudit local_login_t sysfs_t:dir search;

allow local_login_t autofs_t:dir { search read getattr };
allow local_login_t mnt_t:dir r_dir_perms;

# FIXME: what is this for?
optional_policy(`xdm.te', `
allow xdm_t local_login_t:process signull;
')

ifdef(`crack.te', `
allow local_login_t crack_db_t:file r_file_perms;
')

# Permit login to search the user home directories.
allow local_login_t home_root_t:dir search;
allow local_login_t home_dir_type:dir search;

# Write to /var/log/btmp
allow local_login_t faillog_t:file { append read write };

# Search for mail spool file.
allow local_login_t mail_spool_t:dir r_dir_perms;
allow local_login_t mail_spool_t:file getattr;
allow local_login_t mail_spool_t:lnk_file read;

allow local_login_t mouse_device_t:chr_file { getattr setattr };

tunable_policy(`targeted_policy',`
unconfined_domain(local_login_t)
domain_auto_trans(local_login_t, shell_exec_t, unconfined_t)
')

# But also permit other user domains to be entered by login.
domain_trans(local_login_t, shell_exec_t, userdomain)
allow local_login_t userdomain:process signal;

# Do not audit denied attempts to access devices.
dontaudit local_login_t fixed_disk_device_t:blk_file { getattr setattr };
dontaudit local_login_t removable_device_t:blk_file { getattr setattr };
dontaudit local_login_t device_t:{ chr_file blk_file lnk_file } { getattr setattr };
dontaudit local_login_t misc_device_t:{ chr_file blk_file } { getattr setattr };
dontaudit local_login_t framebuf_device_t:chr_file { getattr setattr read };
dontaudit local_login_t apm_bios_t:chr_file { getattr setattr };
dontaudit local_login_t v4l_device_t:chr_file { getattr setattr read };
dontaudit local_login_t removable_device_t:chr_file { getattr setattr };
dontaudit local_login_t scanner_device_t:chr_file { getattr setattr };

# Do not audit denied attempts to access /mnt.
dontaudit local_login_t mnt_t:dir r_dir_perms;

# Create lock file.
allow local_login_t var_lock_t:dir rw_dir_perms;
allow local_login_t var_lock_t:file create_file_perms;

# Read and write ttys.
allow local_login_t tty_device_t:chr_file setattr;
allow local_login_t ttyfile:chr_file setattr;

# Relabel ttys.
allow local_login_t tty_device_t:chr_file { relabelfrom relabelto };
allow local_login_t ttyfile:chr_file { relabelfrom relabelto };

optional_policy(`gpm.te',`
allow local_login_t gpmctl_t:sock_file { getattr setattr };
')

# Allow setting of attributes on sound devices.
allow local_login_t sound_device_t:chr_file { getattr setattr };

# Allow setting of attributes on power management devices.
allow local_login_t power_device_t:chr_file { getattr setattr };

#if (use_nfs_home_dirs) {
#r_dir_file(local_login_t, nfs_t)
#}

#if (use_samba_home_dirs) {
#r_dir_file(local_login_t, cifs_t)
#}
') dnl endif TODO