## <summary>Policy common to all email tranfer agents.</summary>

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

#

# Per user domain template for this module

#

# mta_per_userdomain_template(userdomain_prefix)

#

template(`mta_per_userdomain_template',`

	type $1_mail_t; # , user_mail_domain

	domain_type($1_mail_t)

	role $1_r types $1_mail_t;

	type $1_mail_tmp_t;

	files_tmp_file($1_mail_tmp_t)

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

	#

	# $1_mail_t local policy

	#

	allow $1_mail_t self:capability { setuid setgid chown };

	allow $1_mail_t self:process { signal_perms setrlimit };

	# tcp networking

	allow $1_mail_t self:tcp_socket create_socket_perms;

	# re-exec itself

	can_exec($1_mail_t, sendmail_exec_t)

	allow $1_mail_t sendmail_exec_t:lnk_file r_file_perms;

	# Transition from the user domain to the derived domain.

	domain_auto_trans($1_t, sendmail_exec_t, $1_mail_t)

	allow $1_t sendmail_exec_t:lnk_file { getattr read };

	allow $1_t $1_mail_t:fd use;

	allow $1_mail_t $1_t:fd use;

	allow $1_mail_t $1_t:fifo_file rw_file_perms;

	allow $1_mail_t $1_t:process sigchld;

	kernel_read_kernel_sysctl($1_mail_t)

	corenet_tcp_sendrecv_all_if($1_mail_t)

	corenet_raw_sendrecv_all_if($1_mail_t)

	corenet_tcp_sendrecv_all_nodes($1_mail_t)

	corenet_raw_sendrecv_all_nodes($1_mail_t)

	corenet_tcp_sendrecv_all_ports($1_mail_t)

	corenet_tcp_bind_all_nodes($1_mail_t)

	domain_use_wide_inherit_fd($1_mail_t)

	libs_use_ld_so($1_mail_t)

	libs_use_shared_libs($1_mail_t)

	corecmd_exec_bin($1_mail_t)

	corecmd_search_sbin($1_mail_t)

	files_read_etc_files($1_mail_t)

	files_search_spool($1_mail_t)

	logging_send_syslog_msg($1_mail_t)

	miscfiles_read_localization($1_mail_t)

	sysnet_read_config($1_mail_t)

	tunable_policy(`use_dns',`

		allow $1_mail_t self:udp_socket create_socket_perms;

		corenet_udp_sendrecv_all_if($1_mail_t)

		corenet_udp_sendrecv_all_nodes($1_mail_t)

		corenet_udp_bind_all_nodes($1_mail_t)

		corenet_udp_sendrecv_dns_port($1_mail_t)

	')

	tunable_policy(`use_samba_home_dirs',`

		fs_manage_cifs_files($1_mail_t)

		fs_manage_cifs_symlinks($1_mail_t)

	')

	optional_policy(`nis.te',`

		nis_use_ypbind($1_mail_t)

	')

	optional_policy(`nscd.te',`

		nscd_use_socket($1_mail_t)

	')

	optional_policy(`procmail.te',`

		procmail_execute($1_mail_t)

	')

	ifdef(`TODO',`

	allow $1_mail_t device_t:dir search;

	# It wants to check for nscd

	dontaudit $1_mail_t var_run_t:dir search;

	# For when the user wants to send mail via port 25 localhost

	can_tcp_connect($1_t, mail_server_domain)

	# Read user temporary files.

	allow $1_mail_t $1_tmp_t:file r_file_perms;

	dontaudit $1_mail_t $1_tmp_t:file append;

	ifdef(`postfix.te',`

		# postfix seems to need write access if the file handle is opened read/write

		allow $1_mail_t $1_tmp_t:file write;

	')

	allow mta_user_agent $1_tmp_t:file r_file_perms;

	# Write to the user domain tty.

	allow mta_user_agent $1_tty_device_t:chr_file rw_file_perms;

	allow mta_user_agent devpts_t:dir r_dir_perms;

	allow mta_user_agent $1_devpts_t:chr_file rw_file_perms;

	allow $1_mail_t $1_tty_device_t:chr_file rw_file_perms;

	allow $1_mail_t devpts_t:dir r_dir_perms;

	allow $1_mail_t $1_devpts_t:chr_file rw_file_perms;

	# Inherit and use descriptors from gnome-pty-helper.

	ifdef(`gnome-pty-helper.te', `allow $1_mail_t $1_gph_t:fd use;')

	# Create dead.letter in user home directories.

	file_type_auto_trans($1_mail_t, $1_home_dir_t, $1_home_t, file)

	# if you do not want to allow dead.letter then use the following instead

	#allow $1_mail_t { $1_home_dir_t $1_home_t }:dir r_dir_perms;

	#allow $1_mail_t $1_home_t:file r_file_perms;

	# for reading .forward - maybe we need a new type for it?

	# also for delivering mail to maildir

	file_type_auto_trans(mta_delivery_agent, $1_home_dir_t, $1_home_t)

	ifdef(`qmail.te', `

		allow $1_mail_t qmail_etc_t:dir search;

		allow $1_mail_t qmail_etc_t:{ file lnk_file } read;

	')

	') dnl end TODO

')

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

#

# mta_mailserver(domain,entrypointtype)

#

interface(`mta_mailserver',`

	gen_require(`

		attribute mailserver_domain;

	')

	init_daemon_domain($1,$2)

	typeattribute $1 mailserver_domain;

')

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

## <summary>

##	Modified mailserver interface for

##	sendmail daemon use.

## </summary>

## <desc>

##	

##	A modified MTA mail server interface for

##	the sendmail program.  It's design does

##	not fit well with policy, and using the

##	regular interface causes a type_transition

##	conflict if direct running of init scripts

##	is enabled.

##	

##	

##	This interface should most likely only be used

##	by the sendmail policy.

##	

## </desc>

## <param name="domain">

##	The type to be used for the mail server.

## </param>

## <param name="entry_point">

##	The type to be used for the domain entry point program.

## </param>

interface(`mta_sendmail_mailserver',`

	gen_require(`

		attribute mailserver_domain;

		type sendmail_exec_t;

	')

	init_system_domain($1,sendmail_exec_t)

	typeattribute $1 mailserver_domain;

')

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

#

# mta_send_mail(domain)

#

interface(`mta_send_mail',`

	gen_require(`

		type system_mail_t, sendmail_exec_t;

		class lnk_file r_file_perms;

		class process sigchld;

		class fd use;

		class fifo_file rw_file_perms;

	')

	allow $1 sendmail_exec_t:lnk_file r_file_perms;

	domain_auto_trans($1, sendmail_exec_t, system_mail_t)

	allow $1 system_mail_t:fd use;

	allow system_mail_t $1:fd use;

	allow system_mail_t $1:fifo_file rw_file_perms;

	allow system_mail_t $1:process sigchld;

	ifdef(`TODO',`

	allow mta_user_agent $1:fd use;

	allow mta_user_agent $1:process sigchld;

	allow mta_user_agent $1:fifo_file { read write };

	')

')

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

#

# mta_exec(domain)

#

interface(`mta_exec',`

	gen_require(`

		type sendmail_exec_t;

	')

	can_exec($1, sendmail_exec_t)

')

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

## <desc>

##	Read mail address aliases.

## </desc>

## <param name="domain">

##	The type of the process performing this action.

## </param>

#

interface(`mta_read_aliases',`

	gen_require(`

		type etc_aliases_t;

		class file r_file_perms;

	')

	files_search_etc($1)

	allow $1 etc_aliases_t:file r_file_perms;

')

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

#

# mta_rw_aliases(domain)

#

interface(`mta_rw_aliases',`

	gen_require(`

		type etc_aliases_t;

		class file { rw_file_perms setattr };

	')

	files_search_etc($1)

	allow sendmail_t etc_aliases_t:file { rw_file_perms setattr };

')

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

## <summary>

##	Do not audit attempts to read a symlink

##	in the mail spool.

## </summary>

## <param name="domain">

##	Domain allowed access.

## </param>

#

interface(`mta_dontaudit_read_spool_symlink',`

	gen_require(`

		type mail_spool_t;

		class lnk_file read;

	')

	dontaudit $1 mail_spool_t:lnk_file read;

')

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

#

# mta_getattr_spool(domain)

#

interface(`mta_getattr_spool',`

	gen_require(`

		type mail_spool_t;

		class dir r_dir_perms;

		class file getattr;

		class lnk_file read;

	')

	files_search_spool($1)

	allow $1 mail_spool_t:dir r_dir_perms;

	allow $1 mail_spool_t:lnk_file read;

	allow $1 mail_spool_t:file getattr;

')

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

#

# mta_rw_spool(domain)

#

interface(`mta_rw_spool',`

	gen_require(`

		type mail_spool_t;

		class dir r_dir_perms;

		class lnk_file { getattr read };

		class file { rw_file_perms setattr };

	')

	files_search_spool($1)

	allow $1 mail_spool_t:dir r_dir_perms;

	allow $1 mail_spool_t:lnk_file { getattr read };

	allow $1 mail_spool_t:file { rw_file_perms setattr };

')

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

#

# mta_manage_spool(domain)

#

interface(`mta_manage_spool',`

	gen_require(`

		type mail_spool_t;

		class dir rw_dir_perms;

		class lnk_file { getattr read };

		class file create_file_perms;

	')

	files_search_spool($1)

	allow $1 mail_spool_t:dir rw_dir_perms;

	allow $1 mail_spool_t:lnk_file { getattr read };

	allow $1 mail_spool_t:file create_file_perms;

')

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

#

# mta_manage_queue(domain)

#

interface(`mta_manage_queue',`

	gen_require(`

		type mqueue_spool_t;

		class dir rw_dir_perms;

		class file create_file_perms;

	')

	files_search_spool($1)

	allow $1 mqueue_spool_t:dir rw_dir_perms;

	allow $1 mqueue_spool_t:file create_file_perms;

')