#DESC SAMBA - SMB file server

#

# Author: Ryan Bergauer (bergauer@rice.edu)

# X-Debian-Packages: samba

#

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

#

# Declarations for Samba

#

daemon_domain(smbd, `, auth_chkpwd, nscd_client_domain')

daemon_domain(nmbd)

type samba_etc_t, file_type, sysadmfile, usercanread;

type samba_log_t, file_type, sysadmfile, logfile;

type samba_var_t, file_type, sysadmfile;

type samba_share_t, file_type, sysadmfile, customizable;

type samba_secrets_t, file_type, sysadmfile;

# for /var/run/samba/messages.tdb

allow smbd_t nmbd_var_run_t:file rw_file_perms;

allow smbd_t self:process setrlimit;

# not sure why it needs this

tmp_domain(smbd)

ifdef(`crond.te', `

allow system_crond_t samba_etc_t:file { read getattr lock };

allow system_crond_t samba_log_t:file { read getattr lock };

#allow system_crond_t samba_secrets_t:file { read getattr lock };

')

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

#

# Rules for the smbd_t domain.

#

# Permissions normally found in every_domain.

general_domain_access(smbd_t)

general_proc_read_access(smbd_t)

allow smbd_t smbd_port_t:tcp_socket name_bind;

# Use capabilities.

allow smbd_t self:capability { setgid setuid sys_resource net_bind_service lease dac_override dac_read_search };

# Use the network.

can_network(smbd_t)

can_ldap(smbd_t)

can_kerberos(smbd_t)

can_winbind(smbd_t)

allow smbd_t ipp_port_t:tcp_socket name_connect;

allow smbd_t urandom_device_t:chr_file { getattr read };

# Permissions for Samba files in /etc/samba

# either allow read access to the directory or allow the auto_trans rule to

# allow creation of the secrets.tdb file and the MACHINE.SID file

#allow smbd_t samba_etc_t:dir { search getattr };

file_type_auto_trans(smbd_t, samba_etc_t, samba_secrets_t, file)

allow smbd_t { etc_t samba_etc_t etc_runtime_t }:file r_file_perms;

# Permissions for Samba cache files in /var/cache/samba and /var/lib/samba

allow smbd_t var_lib_t:dir search;

create_dir_file(smbd_t, samba_var_t)

# Needed for shared printers

allow smbd_t var_spool_t:dir search;

# Permissions to write log files.

allow smbd_t samba_log_t:file { create ra_file_perms };

allow smbd_t var_log_t:dir search;

allow smbd_t samba_log_t:dir ra_dir_perms;

dontaudit smbd_t samba_log_t:dir remove_name;

allow smbd_t usr_t:file { getattr read };

# Access Samba shares.

create_dir_file(smbd_t, samba_share_t)

ifdef(`logrotate.te', `

# the application should be changed

can_exec(logrotate_t, samba_log_t)

')

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

#

# Rules for the nmbd_t domain.

#

# Permissions normally found in every_domain.

general_domain_access(nmbd_t)

general_proc_read_access(nmbd_t)

allow nmbd_t nmbd_port_t:udp_socket name_bind;

# Use capabilities.

allow nmbd_t self:capability net_bind_service;

# Use the network.

can_network_server(nmbd_t)

# Permissions for Samba files in /etc/samba

allow nmbd_t samba_etc_t:file { getattr read };

allow nmbd_t samba_etc_t:dir { search getattr };

# Permissions for Samba cache files in /var/cache/samba

allow nmbd_t samba_var_t:dir { write remove_name add_name lock getattr search };

allow nmbd_t samba_var_t:file { lock unlink create write setattr read getattr rename };

allow nmbd_t usr_t:file { getattr read };

# Permissions to write log files.

allow nmbd_t samba_log_t:file { create ra_file_perms };

allow nmbd_t var_log_t:dir search;

allow nmbd_t samba_log_t:dir ra_dir_perms;

allow nmbd_t etc_t:file { getattr read };

ifdef(`cups.te', `

allow smbd_t cupsd_rw_etc_t:file { getattr read };

')

# Needed for winbindd

allow smbd_t { samba_var_t smbd_var_run_t }:sock_file create_file_perms;

# Support Samba sharing of home directories

bool samba_enable_home_dirs false;

ifdef(`mount.te', `

#

# Domain for running smbmount

#

# Derive from app. domain. Transition from mount.

application_domain(smbmount, `, fs_domain, nscd_client_domain')

domain_auto_trans(mount_t, smbmount_exec_t, smbmount_t)

# Capabilities

# FIXME: is all of this really necessary?

allow smbmount_t self:capability { net_bind_service sys_rawio sys_admin dac_override chown };

# Access samba config

allow smbmount_t samba_etc_t:file r_file_perms;

allow smbmount_t samba_etc_t:dir r_dir_perms;

allow initrc_t samba_etc_t:file rw_file_perms;

# Write samba log

allow smbmount_t samba_log_t:file create_file_perms;

allow smbmount_t samba_log_t:dir r_dir_perms; 

# Write stuff in var

allow smbmount_t var_log_t:dir r_dir_perms;

rw_dir_create_file(smbmount_t, samba_var_t)

# Access mtab

file_type_auto_trans(smbmount_t, etc_t, etc_runtime_t, file)

# Read nsswitch.conf

allow smbmount_t etc_t:file r_file_perms;

# Networking

can_network(smbmount_t)

allow smbmount_t port_type:tcp_socket name_connect;

can_ypbind(smbmount_t)

allow smbmount_t self:unix_dgram_socket create_socket_perms;

allow smbmount_t self:unix_stream_socket create_socket_perms;

allow kernel_t smbmount_t:tcp_socket { read write };

allow userdomain smbmount_t:tcp_socket write;

# Proc

# FIXME: is this necessary?

r_dir_file(smbmount_t, proc_t)

# Fork smbmnt 

allow smbmount_t bin_t:dir r_dir_perms;

can_exec(smbmount_t, smbmount_exec_t)

allow smbmount_t self:process { fork signal_perms };

# Mount 

allow smbmount_t cifs_t:filesystem mount_fs_perms;

allow smbmount_t cifs_t:dir r_dir_perms;

allow smbmount_t mnt_t:dir r_dir_perms;

allow smbmount_t mnt_t:dir mounton;

# Terminal

read_locale(smbmount_t) 

access_terminal(smbmount_t, sysadm)

allow smbmount_t userdomain:fd use;

allow smbmount_t local_login_t:fd use;

')

# Derive from app. domain. Transition from mount.

application_domain(samba_net, `, nscd_client_domain')

file_type_auto_trans(samba_net_t, samba_etc_t, samba_secrets_t, file)

read_locale(samba_net_t) 

allow samba_net_t samba_etc_t:file r_file_perms;

r_dir_file(samba_net_t, samba_var_t)

can_network_udp(samba_net_t)

access_terminal(samba_net_t, sysadm)

allow samba_net_t self:unix_dgram_socket create_socket_perms;

allow samba_net_t self:unix_stream_socket create_stream_socket_perms;

rw_dir_create_file(samba_net_t, samba_var_t)

allow samba_net_t etc_t:file { getattr read };

can_network_client(samba_net_t)

allow samba_net_t smbd_port_t:tcp_socket name_connect;

can_ldap(samba_net_t)

can_kerberos(samba_net_t)

allow samba_net_t urandom_device_t:chr_file r_file_perms;

allow samba_net_t proc_t:dir search;

allow samba_net_t proc_t:lnk_file read;

allow samba_net_t self:dir search;

allow samba_net_t self:file read;

allow samba_net_t self:process signal;

tmp_domain(samba_net)

dontaudit samba_net_t sysadm_home_dir_t:dir search;

allow samba_net_t privfd:fd use;