selinux-policy/policy/modules/services/postfix.if

## <summary>Postfix email server</summary>

########################################
## <summary>
##	Postfix stub interface.  No access allowed.
## </summary>
## <param name="domain" unused="true">
##	<summary>
##	Domain allowed access.
##	</summary>
## </param>
#
interface(`postfix_stub',`
	gen_require(`
		type postfix_master_t;
	')
')

########################################
## <summary>
##	Creates types and rules for a basic
##	postfix process domain.
## </summary>
## <param name="prefix">
##	<summary>
##	Prefix for the domain.
##	</summary>
## </param>
#
template(`postfix_domain_template',`
	type postfix_$1_t;
	type postfix_$1_exec_t;
	domain_type(postfix_$1_t)
	domain_entry_file(postfix_$1_t, postfix_$1_exec_t)
	role system_r types postfix_$1_t;

	dontaudit postfix_$1_t self:capability sys_tty_config;
	allow postfix_$1_t self:process { signal_perms setpgid };
	allow postfix_$1_t self:unix_dgram_socket create_socket_perms;
	allow postfix_$1_t self:unix_stream_socket create_stream_socket_perms;
	allow postfix_$1_t self:unix_stream_socket connectto;

	allow postfix_master_t postfix_$1_t:process signal;
	#https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=244456
	allow postfix_$1_t postfix_master_t:file read;

	allow postfix_$1_t postfix_etc_t:dir list_dir_perms;
	read_files_pattern(postfix_$1_t, postfix_etc_t, postfix_etc_t)
	read_lnk_files_pattern(postfix_$1_t, postfix_etc_t, postfix_etc_t)

	can_exec(postfix_$1_t, postfix_$1_exec_t)

	allow postfix_$1_t postfix_exec_t:file { mmap_file_perms lock };

	allow postfix_$1_t postfix_master_t:process sigchld;

	allow postfix_$1_t postfix_spool_t:dir list_dir_perms;

	allow postfix_$1_t postfix_var_run_t:file manage_file_perms;
	files_pid_filetrans(postfix_$1_t, postfix_var_run_t, file)

	kernel_read_system_state(postfix_$1_t)
	kernel_read_network_state(postfix_$1_t)
	kernel_read_all_sysctls(postfix_$1_t)

	dev_read_sysfs(postfix_$1_t)
	dev_read_rand(postfix_$1_t)
	dev_read_urand(postfix_$1_t)

	fs_search_auto_mountpoints(postfix_$1_t)
	fs_getattr_xattr_fs(postfix_$1_t)
	fs_rw_anon_inodefs_files(postfix_$1_t)

	term_dontaudit_use_console(postfix_$1_t)

	corecmd_exec_shell(postfix_$1_t)

	files_read_etc_files(postfix_$1_t)
	files_read_etc_runtime_files(postfix_$1_t)
	files_read_usr_files(postfix_$1_t)
	files_read_usr_symlinks(postfix_$1_t)
	files_search_spool(postfix_$1_t)
	files_getattr_tmp_dirs(postfix_$1_t)
	files_search_all_mountpoints(postfix_$1_t)

	init_dontaudit_use_fds(postfix_$1_t)
	init_sigchld(postfix_$1_t)

	auth_use_nsswitch(postfix_$1_t)

	logging_send_syslog_msg(postfix_$1_t)

	miscfiles_read_localization(postfix_$1_t)
	miscfiles_read_generic_certs(postfix_$1_t)

	userdom_dontaudit_use_unpriv_user_fds(postfix_$1_t)

	optional_policy(`
		udev_read_db(postfix_$1_t)
	')
')

########################################
## <summary>
##	Creates a postfix server process domain.
## </summary>
## <param name="prefix">
##	<summary>
##	Prefix of the domain.
##	</summary>
## </param>
#
template(`postfix_server_domain_template',`
	postfix_domain_template($1)

	type postfix_$1_tmp_t;
	files_tmp_file(postfix_$1_tmp_t)

	allow postfix_$1_t self:capability { setuid setgid dac_override };
	allow postfix_$1_t postfix_master_t:unix_stream_socket { connectto rw_stream_socket_perms };
	allow postfix_$1_t self:tcp_socket create_socket_perms;
	allow postfix_$1_t self:udp_socket create_socket_perms;

	manage_dirs_pattern(postfix_$1_t, postfix_$1_tmp_t, postfix_$1_tmp_t)
	manage_files_pattern(postfix_$1_t, postfix_$1_tmp_t, postfix_$1_tmp_t)
	files_tmp_filetrans(postfix_$1_t, postfix_$1_tmp_t, { file dir })

	domtrans_pattern(postfix_master_t, postfix_$1_exec_t, postfix_$1_t)

	corenet_all_recvfrom_unlabeled(postfix_$1_t)
	corenet_all_recvfrom_netlabel(postfix_$1_t)
	corenet_tcp_sendrecv_generic_if(postfix_$1_t)
	corenet_udp_sendrecv_generic_if(postfix_$1_t)
	corenet_tcp_sendrecv_generic_node(postfix_$1_t)
	corenet_udp_sendrecv_generic_node(postfix_$1_t)
	corenet_tcp_sendrecv_all_ports(postfix_$1_t)
	corenet_udp_sendrecv_all_ports(postfix_$1_t)
	corenet_tcp_bind_generic_node(postfix_$1_t)
	corenet_udp_bind_generic_node(postfix_$1_t)
	corenet_tcp_connect_all_ports(postfix_$1_t)
	corenet_sendrecv_all_client_packets(postfix_$1_t)
')

########################################
## <summary>
##	Creates a process domain for programs
##	that are ran by users.
## </summary>
## <param name="prefix">
##	<summary>
##	Prefix of the domain.
##	</summary>
## </param>
#
template(`postfix_user_domain_template',`
	gen_require(`
		attribute postfix_user_domains, postfix_user_domtrans;
	')

	postfix_domain_template($1)

	typeattribute postfix_$1_t postfix_user_domains;

	allow postfix_$1_t self:capability dac_override;

	domtrans_pattern(postfix_user_domtrans, postfix_$1_exec_t, postfix_$1_t)

	domain_use_interactive_fds(postfix_$1_t)
')

########################################
## <summary>
##	Read postfix configuration files.
## </summary>
## <param name="domain">
##	<summary>
##	Domain allowed access.
##	</summary>
## </param>
## <rolecap/>
#
interface(`postfix_read_config',`
	gen_require(`
		type postfix_etc_t;
	')

	read_files_pattern($1, postfix_etc_t, postfix_etc_t)
	read_lnk_files_pattern($1, postfix_etc_t, postfix_etc_t)
	files_search_etc($1)
')

########################################
## <summary>
##	Create files with the specified type in
##	the postfix configuration directories.
## </summary>
## <param name="domain">
##	<summary>
##	Domain allowed access.
##	</summary>
## </param>
## <param name="private type">
##	<summary>
##	The type of the object to be created.
##	</summary>
## </param>
## <param name="object">
##	<summary>
##	The object class of the object being created.
##	</summary>
## </param>
#
interface(`postfix_config_filetrans',`
	gen_require(`
		type postfix_etc_t;
	')

	files_search_etc($1)
	filetrans_pattern($1, postfix_etc_t, $2, $3)
')

########################################
## <summary>
##	Do not audit attempts to read and
##	write postfix local delivery
##	TCP sockets.
## </summary>
## <param name="domain">
##	<summary>
##	Domain to not audit.
##	</summary>
## </param>
#
interface(`postfix_dontaudit_rw_local_tcp_sockets',`
	gen_require(`
		type postfix_local_t;
	')

	dontaudit $1 postfix_local_t:tcp_socket { read write };
')

########################################
## <summary>
##	Allow read/write postfix local pipes
##	TCP sockets.
## </summary>
## <param name="domain">
##	<summary>
##	Domain allowed access.
##	</summary>
## </param>
#
interface(`postfix_rw_local_pipes',`
	gen_require(`
		type postfix_local_t;
	')

	allow $1 postfix_local_t:fifo_file rw_fifo_file_perms;
')

########################################
## <summary>
##	Allow domain to read postfix local process state
## </summary>
## <param name="domain">
##	<summary>
##	Domain allowed access.
##	</summary>
## </param>
#
interface(`postfix_read_local_state',`
	gen_require(`
		type postfix_local_t;
	')

	kernel_search_proc($1)
	ps_process_pattern($1, postfix_local_t)
')

########################################
## <summary>
##	Allow domain to read postfix master process state
## </summary>
## <param name="domain">
##	<summary>
##	Domain allowed access.
##	</summary>
## </param>
#
interface(`postfix_read_master_state',`
	gen_require(`
		type postfix_master_t;
	')

	kernel_search_proc($1)
	ps_process_pattern($1, postfix_master_t)
')

########################################
## <summary>
##	Do not audit attempts to use
##	postfix master process file
##	file descriptors.
## </summary>
## <param name="domain">
##	<summary>
##	Domain to not audit.
##	</summary>
## </param>
#
interface(`postfix_dontaudit_use_fds',`
	gen_require(`
		type postfix_master_t;
	')

	dontaudit $1 postfix_master_t:fd use;
')

########################################
## <summary>
##	Execute postfix_map in the postfix_map domain.
## </summary>
## <param name="domain">
##	<summary>
##	Domain allowed to transition.
##	</summary>
## </param>
#
interface(`postfix_domtrans_map',`
	gen_require(`
		type postfix_map_t, postfix_map_exec_t;
	')

	domtrans_pattern($1, postfix_map_exec_t, postfix_map_t)
')

########################################
## <summary>
##	Execute postfix_map in the postfix_map domain, and
##	allow the specified role the postfix_map domain.
## </summary>
## <param name="domain">
##	<summary>
##	Domain allowed to transition.
##	</summary>
## </param>
## <param name="role">
##	<summary>
##	Role allowed access.
##	</summary>
## </param>
## <rolecap/>
#
interface(`postfix_run_map',`
	gen_require(`
		type postfix_map_t;
	')

	postfix_domtrans_map($1)
	role $2 types postfix_map_t;
')

########################################
## <summary>
##	Execute the master postfix program in the
##	postfix_master domain.
## </summary>
## <param name="domain">
##	<summary>
##	Domain allowed to transition.
##	</summary>
## </param>
#
interface(`postfix_domtrans_master',`
	gen_require(`
		type postfix_master_t, postfix_master_exec_t;
	')

	domtrans_pattern($1, postfix_master_exec_t, postfix_master_t)
')


########################################
## <summary>
##	Execute the master postfix in the postfix master domain.
## </summary>
## <param name="domain">
##	<summary>
##	Domain allowed access.
##	</summary>
## </param>
#
interface(`postfix_initrc_domtrans',`
	gen_require(`
		type postfix_initrc_exec_t;
	')

	init_labeled_script_domtrans($1, postfix_initrc_exec_t)
')

########################################
## <summary>
##	Execute the master postfix program in the
##	caller domain.
## </summary>
## <param name="domain">
##	<summary>
##	Domain allowed access.
##	</summary>
## </param>
#
interface(`postfix_exec_master',`
	gen_require(`
		type postfix_master_exec_t;
	')

	can_exec($1, postfix_master_exec_t)
')

#######################################
## <summary>
##	Connect to postfix master process using a unix domain stream socket.
## </summary>
## <param name="domain">
##	<summary>
##	Domain allowed access.
##	</summary>
## </param>
#
interface(`postfix_stream_connect_master',`
	gen_require(`
		type postfix_master_t, postfix_public_t;
	')

	stream_connect_pattern($1, postfix_public_t, postfix_public_t, postfix_master_t)
')

########################################
## <summary>
##	Execute the master postdrop in the
##	postfix_postdrop domain.
## </summary>
## <param name="domain">
##	<summary>
##	Domain allowed to transition.
##	</summary>
## </param>
#
interface(`postfix_domtrans_postdrop',`
	gen_require(`
		type postfix_postdrop_t, postfix_postdrop_exec_t;
	')

	domtrans_pattern($1, postfix_postdrop_exec_t, postfix_postdrop_t)
')

########################################
## <summary>
##	Execute the master postqueue in the
##	postfix_postqueue domain.
## </summary>
## <param name="domain">
##	<summary>
##	Domain allowed to transition.
##	</summary>
## </param>
#
interface(`postfix_domtrans_postqueue',`
	gen_require(`
		type postfix_postqueue_t, postfix_postqueue_exec_t;
	')

	domtrans_pattern($1, postfix_postqueue_exec_t, postfix_postqueue_t)
')

#######################################
## <summary>
##	Execute the master postqueue in the caller domain.
## </summary>
## <param name="domain">
##	<summary>
##	Domain allowed access.
##	</summary>
## </param>
#
interface(`posftix_exec_postqueue',`
	gen_require(`
		type postfix_postqueue_exec_t;
	')

	can_exec($1, postfix_postqueue_exec_t)
')

########################################
## <summary>
##	Create a named socket in a postfix private directory.
## </summary>
## <param name="domain">
##	<summary>
##	Domain allowed access.
##	</summary>
## </param>
#
interface(`postfix_create_private_sockets',`
	gen_require(`
		type postfix_private_t;
	')

	allow $1 postfix_private_t:dir list_dir_perms;
	create_sock_files_pattern($1, postfix_private_t, postfix_private_t)
')

########################################
## <summary>
##	manage named socket in a postfix private directory.
## </summary>
## <param name="domain">
##	<summary>
##	Domain allowed access.
##	</summary>
## </param>
#
interface(`postfix_manage_private_sockets',`
	gen_require(`
		type postfix_private_t;
	')

	allow $1 postfix_private_t:dir list_dir_perms;
	manage_sock_files_pattern($1, postfix_private_t, postfix_private_t)
')

########################################
## <summary>
##	Execute the master postfix program in the
##	postfix_master domain.
## </summary>
## <param name="domain">
##	<summary>
##	Domain allowed to transition.
##	</summary>
## </param>
#
interface(`postfix_domtrans_smtp',`
	gen_require(`
		type postfix_smtp_t, postfix_smtp_exec_t;
	')

	domtrans_pattern($1, postfix_smtp_exec_t, postfix_smtp_t)
')

########################################
## <summary>
##	Getattr postfix mail spool files.
## </summary>
## <param name="domain">
##	<summary>
##	Domain allowed access.
##	</summary>
## </param>
#
interface(`postfix_getattr_spool_files',`
	gen_require(`
		attribute postfix_spool_type;
	')

	files_search_spool($1)
	getattr_files_pattern($1, postfix_spool_type, postfix_spool_type)
')

########################################
## <summary>
##	Search postfix mail spool directories.
## </summary>
## <param name="domain">
##	<summary>
##	Domain allowed access.
##	</summary>
## </param>
#
interface(`postfix_search_spool',`
	gen_require(`
		attribute postfix_spool_type;
	')

	allow $1 postfix_spool_type:dir search_dir_perms;
	files_search_spool($1)
')

########################################
## <summary>
##	List postfix mail spool directories.
## </summary>
## <param name="domain">
##	<summary>
##	Domain allowed access.
##	</summary>
## </param>
#
interface(`postfix_list_spool',`
	gen_require(`
		attribute postfix_spool_type;
	')

	allow $1 postfix_spool_type:dir list_dir_perms;
	files_search_spool($1)
')

########################################
## <summary>
##	Read postfix mail spool files.
## </summary>
## <param name="domain">
##	<summary>
##	Domain allowed access.
##	</summary>
## </param>
#
interface(`postfix_read_spool_files',`
	gen_require(`
		attribute postfix_spool_type;
	')

	files_search_spool($1)
	read_files_pattern($1, postfix_spool_type, postfix_spool_type)
')

########################################
## <summary>
##	Create, read, write, and delete postfix mail spool files.
## </summary>
## <param name="domain">
##	<summary>
##	Domain allowed access.
##	</summary>
## </param>
#
interface(`postfix_manage_spool_files',`
	gen_require(`
		attribute postfix_spool_type;
	')

	files_search_spool($1)
	manage_files_pattern($1, postfix_spool_type, postfix_spool_type)
')

########################################
## <summary>
##	Execute postfix user mail programs
##	in their respective domains.
## </summary>
## <param name="domain">
##	<summary>
##	Domain allowed access.
##	</summary>
## </param>
#
interface(`postfix_domtrans_user_mail_handler',`
	gen_require(`
		attribute postfix_user_domtrans;
	')

	typeattribute $1 postfix_user_domtrans;
')

########################################
## <summary>
##	All of the rules required to administrate
##	an postfix environment.
## </summary>
## <param name="domain">
##	<summary>
##	Domain allowed access.
##	</summary>
## </param>
## <param name="role">
##	<summary>
##	Role allowed access.
##	</summary>
## </param>
## <rolecap/>
#
interface(`postfix_admin',`
	gen_require(`
		attribute postfix_spool_type;
		type postfix_bounce_t, postfix_cleanup_t, postfix_local_t;
		type postfix_master_t, postfix_pickup_t, postfix_qmgr_t;
		type postfix_initrc_exec_t, postfix_data_t, postfix_etc_t;
		type postfix_map_tmp_t, postfix_prng_t, postfix_public_t;
		type postfix_smtpd_t, postfix_var_run_t;
	')

	allow $1 postfix_bounce_t:process { ptrace signal_perms };
	ps_process_pattern($1, postfix_bounce_t)

	allow $1 postfix_cleanup_t:process { ptrace signal_perms };
	ps_process_pattern($1, postfix_cleanup_t)

	allow $1 postfix_local_t:process { ptrace signal_perms };
	ps_process_pattern($1, postfix_local_t)

	allow $1 postfix_master_t:process { ptrace signal_perms };
	ps_process_pattern($1, postfix_master_t)

	allow $1 postfix_pickup_t:process { ptrace signal_perms };
	ps_process_pattern($1, postfix_pickup_t)

	allow $1 postfix_qmgr_t:process { ptrace signal_perms };
	ps_process_pattern($1, postfix_qmgr_t)

	allow $1 postfix_smtpd_t:process { ptrace signal_perms };
	ps_process_pattern($1, postfix_smtpd_t)

	postfix_run_map($1, $2)
	postfix_run_postdrop($1, $2)

	postfix_initrc_domtrans($1)
	domain_system_change_exemption($1)
	role_transition $2 postfix_initrc_exec_t system_r;
	allow $2 system_r;

	admin_pattern($1, postfix_data_t) 

	files_list_etc($1)
	admin_pattern($1, postfix_etc_t)

	files_list_spool($1)
	admin_pattern($1, postfix_spool_type)

	admin_pattern($1, postfix_var_run_t)

	files_list_tmp($1)
	admin_pattern($1, postfix_map_tmp_t)
	
	admin_pattern($1, postfix_prng_t)

	admin_pattern($1, postfix_public_t)
')

########################################
## <summary>
##	Execute the master postdrop in the
##	postfix_postdrop domain.
## </summary>
## <param name="domain">
##	<summary>
##	Domain allowed to transition.
##	</summary>
## </param>
## <rolecap/>
#
interface(`postfix_run_postdrop',`
	gen_require(`
		type postfix_postdrop_t;
	')

	postfix_domtrans_postdrop($1)
	role $2 types postfix_postdrop_t;
')