policy_module(mta,1.0.2)

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

#

# Declarations

#

attribute mta_user_agent;

attribute mailserver_delivery;

attribute mailserver_domain;

attribute mailserver_sender;

attribute user_mail_domain;

type etc_aliases_t;

files_type(etc_aliases_t)

type etc_mail_t;

files_config_file(etc_mail_t)

type mqueue_spool_t;

files_type(mqueue_spool_t)

type mail_spool_t;

files_type(mail_spool_t)

type sendmail_exec_t;

files_type(sendmail_exec_t)

mta_base_mail_template(system)

role system_r types system_mail_t;

# cjp: need to resolve this, but require{}

# does not work in the else part of the optional

#ifdef(`strict_policy',`

#	optional_policy(`sendmail',`',`

#		init_system_domain(system_mail_t,sendmail_exec_t)

#	')

#')

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

#

# System mail local policy

#

allow system_mail_t etc_mail_t:dir { getattr search };

allow system_mail_t etc_mail_t:file r_file_perms;

kernel_read_system_state(system_mail_t)

kernel_read_network_state(system_mail_t)

dev_read_rand(system_mail_t)

dev_read_urand(system_mail_t)

init_use_script_pty(system_mail_t)

userdom_use_sysadm_terms(system_mail_t)

ifdef(`hide_broken_symptoms',`

	# Red Hat systems seem to have a stray

	# fds open from the initrd

	ifdef(`distro_redhat',`

		kernel_dontaudit_use_fd(system_mail_t)

		storage_dontaudit_read_fixed_disk(system_mail_t)

	')

')

ifdef(`targeted_policy',`

	typealias system_mail_t alias sysadm_mail_t;

	allow system_mail_t mail_spool_t:dir create_dir_perms;

	allow system_mail_t mail_spool_t:file create_file_perms;

	allow system_mail_t mail_spool_t:lnk_file create_lnk_perms;

	allow system_mail_t mail_spool_t:fifo_file rw_file_perms;

	allow system_mail_t mqueue_spool_t:dir create_dir_perms;

	allow system_mail_t mqueue_spool_t:file create_file_perms;

	allow system_mail_t mqueue_spool_t:lnk_file create_lnk_perms;

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

	# also for delivering mail to maildir

	# cjp: fix this to generic_user interfaces

	userdom_manage_user_home_subdirs(user,mailserver_delivery)

	userdom_manage_user_home_subdir_files(user,mailserver_delivery)

	userdom_manage_user_home_subdir_symlinks(user,mailserver_delivery)

	userdom_manage_user_home_subdir_pipes(user,mailserver_delivery)

	userdom_manage_user_home_subdir_sockets(user,mailserver_delivery)

	userdom_create_user_home(user,mailserver_delivery,{ dir file lnk_file fifo_file sock_file })

# cjp: another require-in-else to resolve

#	optional_policy(`postfix',`',`

		corecmd_exec_bin(system_mail_t)

		corecmd_exec_sbin(system_mail_t)

		domain_exec_all_entry_files(system_mail_t)

		files_exec_etc_files(system_mail_t)

		libs_exec_ld_so(system_mail_t)

		libs_exec_lib_files(system_mail_t)

#	')

')

optional_policy(`apache',`

	apache_read_squirrelmail_data(system_mail_t)

	apache_append_squirrelmail_data(system_mail_t)

	# apache should set close-on-exec

	apache_dontaudit_append_log(system_mail_t)

	apache_dontaudit_rw_stream_socket(system_mail_t)

	apache_dontaudit_rw_tcp_socket(system_mail_t)

	apache_dontaudit_rw_sys_script_stream_socket(system_mail_t)

')

optional_policy(`arpwatch',`

	arpwatch_manage_tmp_files(system_mail_t)

	ifdef(`hide_broken_symptoms', `

		arpwatch_dontaudit_rw_packet_socket(system_mail_t)

	')

')

optional_policy(`cron',`

	cron_read_system_job_tmp_files(system_mail_t)

')

optional_policy(`cvs',`

	cvs_read_data(system_mail_t)

')

optional_policy(`logrotate',`

	logrotate_read_tmp_files(system_mail_t)

')

optional_policy(`postfix',`

	allow system_mail_t etc_aliases_t:dir create_dir_perms;

	allow system_mail_t etc_aliases_t:file create_file_perms;

	allow system_mail_t etc_aliases_t:lnk_file create_lnk_perms;

	allow system_mail_t etc_aliases_t:sock_file create_file_perms;

	allow system_mail_t etc_aliases_t:fifo_file create_file_perms;

	files_create_etc_config(system_mail_t,etc_aliases_t,{ file lnk_file sock_file fifo_file })

	domain_use_wide_inherit_fd(system_mail_t)

	# postfix needs this for newaliases

	files_getattr_tmp_dir(system_mail_t)

	postfix_exec_master(system_mail_t)

	ifdef(`distro_redhat',`

		# compatability for old default main.cf

		postfix_create_config(system_mail_t,etc_aliases_t,{ dir file lnk_file sock_file fifo_file })

	')

	optional_policy(`cron',`

		cron_crw_tcp_socket(system_mail_t)

	')

')

optional_policy(`sendmail',`

	userdom_dontaudit_use_unpriv_user_pty(system_mail_t)

	optional_policy(`cron',`

		cron_dontaudit_append_system_job_tmp_files(system_mail_t)

	')

')

# should break this up among sections:

optional_policy(`arpwatch',`

	# why is mail delivered to a directory of type arpwatch_data_t?

	arpwatch_search_data(mailserver_delivery)

	arpwatch_manage_tmp_files(mta_user_agent)

	ifdef(`hide_broken_symptoms', `

		arpwatch_dontaudit_rw_packet_socket(mta_user_agent)

	')

	optional_policy(`cron',`

		cron_read_system_job_tmp_files(mta_user_agent)

	')

')