policy_module(exim)

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

## <desc>
##	<p>
##	Determine whether exim can connect to
##	databases.
##	</p>
## </desc>
gen_tunable(exim_can_connect_db, false)

## <desc>
##	<p>
##	Determine whether exim can read generic
##	user content files.
##	</p>
## </desc>
gen_tunable(exim_read_user_files, false)

## <desc>
##	<p>
##	Determine whether exim can create,
##	read, write, and delete generic user
##	content files.
## </p>
## </desc>
gen_tunable(exim_manage_user_files, false)

attribute_role exim_roles;

type exim_t;
type exim_exec_t;
init_daemon_domain(exim_t, exim_exec_t)
role exim_roles types exim_t;

mta_mailserver(exim_t, exim_exec_t)
mta_mailserver_delivery(exim_t)
mta_mailserver_user_agent(exim_t)
mta_agent_executable(exim_exec_t)

type exim_initrc_exec_t;
init_script_file(exim_initrc_exec_t)

type exim_keytab_t;
files_type(exim_keytab_t)

type exim_var_lib_t;
files_type(exim_var_lib_t)

type exim_log_t;
logging_log_file(exim_log_t)

type exim_pid_t;
files_runtime_file(exim_pid_t)

type exim_spool_t;
files_type(exim_spool_t)

type exim_tmp_t;
files_tmp_file(exim_tmp_t)

ifdef(`distro_debian',`
	init_daemon_runtime_file(exim_pid_t, dir, "exim4")
')

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

allow exim_t self:capability { chown dac_override fowner setgid setuid sys_resource };
allow exim_t self:process { setrlimit setpgid };
allow exim_t self:fifo_file rw_fifo_file_perms;
allow exim_t self:unix_stream_socket { accept listen };
allow exim_t self:tcp_socket { accept listen };

can_exec(exim_t, exim_exec_t)

allow exim_t exim_keytab_t:file read_file_perms;

append_files_pattern(exim_t, exim_log_t, exim_log_t)
create_files_pattern(exim_t, exim_log_t, exim_log_t)
setattr_files_pattern(exim_t, exim_log_t, exim_log_t)
logging_log_filetrans(exim_t, exim_log_t, file)

manage_dirs_pattern(exim_t, exim_pid_t, exim_pid_t)
manage_files_pattern(exim_t, exim_pid_t, exim_pid_t)
files_runtime_filetrans(exim_t, exim_pid_t, { dir file })

manage_dirs_pattern(exim_t, exim_spool_t, exim_spool_t)
manage_files_pattern(exim_t, exim_spool_t, exim_spool_t)
manage_sock_files_pattern(exim_t, exim_spool_t, exim_spool_t)
files_spool_filetrans(exim_t, exim_spool_t, { dir file sock_file })

manage_dirs_pattern(exim_t, exim_tmp_t, exim_tmp_t)
manage_files_pattern(exim_t, exim_tmp_t, exim_tmp_t)
files_tmp_filetrans(exim_t, exim_tmp_t, { dir file })

manage_files_pattern(exim_t, exim_var_lib_t, exim_var_lib_t)

kernel_read_crypto_sysctls(exim_t)
kernel_read_kernel_sysctls(exim_t)
kernel_read_network_state(exim_t)
kernel_dontaudit_read_system_state(exim_t)

corecmd_search_bin(exim_t)

corenet_all_recvfrom_netlabel(exim_t)
corenet_tcp_sendrecv_generic_if(exim_t)
corenet_udp_sendrecv_generic_if(exim_t)
corenet_tcp_sendrecv_generic_node(exim_t)
corenet_udp_sendrecv_generic_node(exim_t)
corenet_tcp_bind_generic_node(exim_t)

corenet_sendrecv_smtp_server_packets(exim_t)
corenet_tcp_bind_smtp_port(exim_t)

corenet_sendrecv_amavisd_send_server_packets(exim_t)
corenet_tcp_bind_amavisd_send_port(exim_t)

corenet_sendrecv_auth_client_packets(exim_t)
corenet_tcp_connect_auth_port(exim_t)

corenet_sendrecv_smtp_client_packets(exim_t)
corenet_tcp_connect_smtp_port(exim_t)

corenet_sendrecv_inetd_child_client_packets(exim_t)
corenet_tcp_connect_inetd_child_port(exim_t)

corenet_sendrecv_spamd_client_packets(exim_t)
corenet_tcp_connect_spamd_port(exim_t)

dev_read_rand(exim_t)
dev_read_urand(exim_t)
dev_read_sysfs(exim_t)

domain_use_interactive_fds(exim_t)

files_search_usr(exim_t)
files_search_var(exim_t)
files_read_etc_runtime_files(exim_t)
files_getattr_all_mountpoints(exim_t)

fs_getattr_xattr_fs(exim_t)
fs_list_inotifyfs(exim_t)

auth_use_nsswitch(exim_t)

logging_send_syslog_msg(exim_t)

miscfiles_read_localization(exim_t)
miscfiles_read_generic_certs(exim_t)
miscfiles_read_generic_tls_privkey(exim_t)

userdom_dontaudit_search_user_home_dirs(exim_t)

mta_read_aliases(exim_t)
mta_read_config(exim_t)
mta_manage_spool(exim_t)

tunable_policy(`exim_can_connect_db',`
	corenet_sendrecv_gds_db_client_packets(exim_t)
	corenet_tcp_connect_gds_db_port(exim_t)
	corenet_sendrecv_mssql_client_packets(exim_t)
	corenet_tcp_connect_mssql_port(exim_t)
	corenet_sendrecv_oracledb_client_packets(exim_t)
	corenet_tcp_connect_oracledb_port(exim_t)
')

tunable_policy(`exim_read_user_files',`
	userdom_read_user_home_content_files(exim_t)
	userdom_read_user_tmp_files(exim_t)
')

tunable_policy(`exim_manage_user_files',`
	userdom_manage_user_home_content_dirs(exim_t)
	userdom_manage_user_tmp_files(exim_t)
')

optional_policy(`
	certbot_read_lib(exim_t)
')

optional_policy(`
	clamav_domtrans_clamscan(exim_t)
	clamav_scannable_files(exim_spool_t)
	clamav_stream_connect(exim_t)
')

optional_policy(`
	cron_read_pipes(exim_t)
	cron_rw_system_job_pipes(exim_t)
	cron_use_system_job_fds(exim_t)
')

optional_policy(`
	cyrus_stream_connect(exim_t)
')

optional_policy(`
	dovecot_stream_connect(exim_t)
')

optional_policy(`
	kerberos_read_keytab(exim_t)
	kerberos_use(exim_t)
')

optional_policy(`
	mailman_read_data_files(exim_t)
	mailman_domtrans(exim_t)
')

optional_policy(`
	nagios_search_spool(exim_t)
')

optional_policy(`
	tunable_policy(`exim_can_connect_db',`
		mysql_stream_connect(exim_t)
		mysql_tcp_connect(exim_t)
	')
')

optional_policy(`
	postgresql_unpriv_client(exim_t)

	tunable_policy(`exim_can_connect_db',`
		postgresql_stream_connect(exim_t)
		postgresql_tcp_connect(exim_t)
	')
')

optional_policy(`
	procmail_domtrans(exim_t)
')

optional_policy(`
	sasl_connect(exim_t)
')

optional_policy(`
	sendmail_manage_tmp_files(exim_t)
')

optional_policy(`
	spamassassin_exec(exim_t)
	spamassassin_exec_client(exim_t)
')