selinux-refpolicy/refpolicy/policy/modules/services/mta.if

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## <module name="mta" layer="services">
## <summary>Policy common to all email tranfer agents.</summary>
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#######################################
#
# Per user domain template for this module
#
# mta_per_userdomain_template(userdomain_prefix)
#
define(`mta_per_userdomain_template',`
requires_block_template(`$0'_depend)
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type $1_mail_t; # , user_mail_domain, nscd_client_domain;
domain_make_domain($1_mail_t)
role $1_r types $1_mail_t;
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type $1_mail_tmp_t;
files_make_temporary_file($1_mail_tmp_t)
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##############################
#
# $1_mail_t local policy
#
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allow $1_mail_t self:capability { setuid setgid chown };
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allow $1_mail_t self:process { signal_perms setrlimit };
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# tcp networking
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allow $1_mail_t self:tcp_socket create_socket_perms;
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# re-exec itself
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can_exec($1_mail_t, sendmail_exec_t)
allow $1_mail_t sendmail_exec_t:lnk_file r_file_perms;
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# Transition from the user domain to the derived domain.
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can_exec($1_t, sendmail_exec_t)
domain_auto_trans($1_t, sendmail_exec_t, $1_mail_t)
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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;
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kernel_read_kernel_sysctl($1_mail_t)
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corenetwork_sendrecv_tcp_on_all_interfaces($1_mail_t)
corenetwork_sendrecv_raw_on_all_interfaces($1_mail_t)
corenetwork_sendrecv_tcp_on_all_nodes($1_mail_t)
corenetwork_sendrecv_raw_on_all_nodes($1_mail_t)
corenetwork_sendrecv_tcp_on_all_ports($1_mail_t)
corenetwork_bind_tcp_on_all_nodes($1_mail_t)
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domain_use_widely_inheritable_file_descriptors($1_mail_t)
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libraries_use_dynamic_loader($1_mail_t)
libraries_use_shared_libraries($1_mail_t)
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corecommands_execute_general_programs($1_mail_t)
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files_read_general_system_config($1_mail_t)
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logging_send_system_log_message($1_mail_t)
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miscfiles_read_localization($1_mail_t)
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sysnetwork_read_network_config($1_mail_t)
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tunable_policy(`use_dns',`
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allow $1_mail_t self:udp_socket create_socket_perms;
corenetwork_sendrecv_udp_on_all_interfaces($1_mail_t)
corenetwork_sendrecv_udp_on_all_nodes($1_mail_t)
corenetwork_bind_udp_on_all_nodes($1_mail_t)
corenetwork_sendrecv_udp_on_dns_port($1_mail_t)
')
optional_policy(`procmail.te',`
procmail_execute($1_mail_t)
')
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ifdef(`TODO',`
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can_ypbind($1_mail_t)
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allow $1_mail_t device_t:dir search;
allow $1_mail_t { var_t var_spool_t }:dir search;
allow $1_mail_t sbin_t:dir search;
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# It wants to check for nscd
dontaudit $1_mail_t var_run_t:dir search;
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# For when the user wants to send mail via port 25 localhost
can_tcp_connect($1_t, mail_server_domain)
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# 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;
')
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allow mta_user_agent $1_tmp_t:file r_file_perms;
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# Write to the user domain tty.
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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;
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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;
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# Inherit and use descriptors from gnome-pty-helper.
ifdef(`gnome-pty-helper.te', `allow $1_mail_t $1_gph_t:fd use;')
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# Create dead.letter in user home directories.
file_type_auto_trans($1_mail_t, $1_home_dir_t, $1_home_t, file)
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if (use_samba_home_dirs) {
rw_dir_create_file($1_mail_t, cifs_t)
}
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# 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;
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# 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)
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ifdef(`qmail.te', `
allow $1_mail_t qmail_etc_t:dir search;
allow $1_mail_t qmail_etc_t:{ file lnk_file } read;
')
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') dnl end TODO
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')
define(`mta_per_userdomain_template_depend',`
')
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#######################################
#
# mta_make_mailserver_domain(domain,entrypointtype)
#
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define(`mta_make_mailserver_domain',`
requires_block_template(`$0'_depend)
init_make_daemon_domain($1,$2)
typeattribute $1 mailserver_domain;
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')
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define(`mta_make_mailserver_domain_depend',`
attribute mailserver_domain;
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')
#######################################
#
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# mta_make_sendmail_mailserver_domain(domain,entrypointtype)
#
define(`mta_make_sendmail_mailserver_domain',`
requires_block_template(`$0'_depend)
mta_make_mailserver_domain($1,sendmail_exec_t)
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')
define(`mta_make_sendmail_mailserver_domain_depend',`
type sendmail_exec_t;
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')
#######################################
#
# mta_send_mail(domain)
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#
define(`mta_send_mail',`
requires_block_template(`$0'_depend)
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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;
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')
define(`mta_send_mail_depend',`
type system_mail_t, sendmail_exec_t;
class file { getattr read execute };
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class lnk_file r_file_perms;
class process { transition noatsecure siginh rlimitinh sigchld };
class fd use;
class fifo_file rw_file_perms;
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')
#######################################
#
# mta_execute(domain)
#
define(`mta_execute',`
requires_block_template(`$0'_depend)
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can_exec($1, sendmail_exec_t)
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')
define(`mta_execute_depend',`
type sendmail_exec_t;
class file { getattr read execute execute_no_trans };
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')
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########################################
## <interface name="mta_read_mail_aliases">
## <description>
## Read mail address aliases.
## </description>
## <parameter name="domain">
## The type of the process performing this action.
## </parameter>
## </interface>
#
define(`mta_read_mail_aliases',`
requires_block_template(`$0'_depend)
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allow $1 etc_aliases_t:file r_file_perms;
')
define(`mta_read_mail_aliases_depend',`
type etc_aliases_t;
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class file r_file_perms;
')
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#######################################
#
# mta_modify_mail_aliases(domain)
#
define(`mta_modify_mail_aliases',`
requires_block_template(`$0'_depend)
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allow sendmail_t etc_aliases_t:file { rw_file_perms setattr };
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')
define(`mta_modify_mail_aliases_depend',`
type etc_aliases_t;
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class file { rw_file_perms setattr };
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')
#######################################
#
# mta_get_mail_spool_attributes(domain)
#
define(`mta_get_mail_spool_attributes',`
requires_block_template(`$0'_depend)
files_search_system_spool_directory($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;
')
define(`mta_get_mail_spool_attributes_depend',`
type mail_spool_t;
class dir r_dir_perms;
class file getattr;
class lnk_file read;
')
#######################################
#
# mta_modify_mail_spool(domain)
#
define(`mta_modify_mail_spool',`
requires_block_template(`$0'_depend)
files_search_system_spool_directory($1)
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allow $1 mail_spool_t:dir rw_dir_perms;
allow $1 mail_spool_t:file { rw_file_perms setattr };
')
define(`mta_modify_mail_spool_depend',`
type mail_spool_t;
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class dir rw_dir_perms;
class file { rw_file_perms setattr };
')
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#######################################
#
# mta_manage_mail_spool(domain)
#
define(`mta_manage_mail_spool',`
requires_block_template(`$0'_depend)
files_search_system_spool_directory($1)
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allow $1 mail_spool_t:dir rw_dir_perms;
allow $1 mail_spool_t:file create_file_perms;
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')
define(`mta_manage_mail_spool_depend',`
type mail_spool_t;
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class dir rw_dir_perms;
class file create_file_perms;
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')
#######################################
#
# mta_manage_mail_queue(domain)
#
define(`mta_manage_mail_queue',`
requires_block_template(`$0'_depend)
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allow $1 mqueue_spool_t:dir rw_dir_perms;
allow $1 mqueue_spool_t:file create_file_perms;
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')
define(`mta_manage_mail_queue_depend',`
type mqueue_spool_t;
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class dir rw_dir_perms;
class file create_file_perms;
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')
## </module>