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

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

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

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;

	allow postfix_$1_t postfix_etc_t:dir r_dir_perms;
	allow postfix_$1_t postfix_etc_t:file r_file_perms;

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

	allow postfix_$1_t postfix_exec_t:file rx_file_perms;
	# cjp: ???
	allow postfix_$1_t postfix_exec_t:dir r_dir_perms;

	allow postfix_$1_t postfix_master_t:process sigchld;

	allow postfix_$1_t postfix_spool_t:dir r_dir_perms;

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

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

	term_dontaudit_use_console(postfix_$1_t)

	corecmd_list_bin(postfix_$1_t)
	corecmd_list_sbin(postfix_$1_t)
	corecmd_read_bin_symlink(postfix_$1_t)
	corecmd_read_sbin_symlink(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_symlinks(postfix_$1_t)
	files_search_spool(postfix_$1_t)
	files_getattr_tmp_dir(postfix_$1_t)

	init_use_fd(postfix_$1_t)
	init_sigchld(postfix_$1_t)

	libs_use_ld_so(postfix_$1_t)
	libs_use_shared_libs(postfix_$1_t)

	logging_send_syslog_msg(postfix_$1_t)

	miscfiles_read_localization(postfix_$1_t)
	miscfiles_read_certs(postfix_$1_t)

	userdom_dontaudit_use_unpriv_user_fd(postfix_$1_t)

	ifdef(`targeted_policy', `
		term_dontaudit_use_unallocated_tty(postfix_$1_t)
		term_dontaudit_use_generic_pty(postfix_$1_t)
		files_dontaudit_read_root_file(postfix_$1_t)
	')

	optional_policy(`nscd',`
		nscd_use_socket(postfix_$1_t)
	')

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

template(`postfix_server_domain_template',`
	postfix_domain_template($1)

	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;

	domain_auto_trans(postfix_master_t, postfix_$1_exec_t, postfix_$1_t)
	allow postfix_master_t postfix_$1_t:fd use;
	allow postfix_$1_t postfix_master_t:fd use;
	allow postfix_$1_t postfix_master_t:fifo_file rw_file_perms;
	allow postfix_$1_t postfix_master_t:process sigchld;

	corenet_tcp_sendrecv_all_if(postfix_$1_t)
	corenet_udp_sendrecv_all_if(postfix_$1_t)
	corenet_raw_sendrecv_all_if(postfix_$1_t)
	corenet_tcp_sendrecv_all_nodes(postfix_$1_t)
	corenet_udp_sendrecv_all_nodes(postfix_$1_t)
	corenet_raw_sendrecv_all_nodes(postfix_$1_t)
	corenet_tcp_sendrecv_all_ports(postfix_$1_t)
	corenet_udp_sendrecv_all_ports(postfix_$1_t)
	corenet_non_ipsec_sendrecv(postfix_$1_t)
	corenet_tcp_bind_all_nodes(postfix_$1_t)
	corenet_udp_bind_all_nodes(postfix_$1_t)
	corenet_tcp_connect_all_ports(postfix_$1_t)

	sysnet_read_config(postfix_$1_t)

	optional_policy(`nis',`
		nis_use_ypbind(postfix_$1_t)
	')
')

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;

	domain_auto_trans(postfix_user_domtrans, postfix_$1_exec_t, postfix_$1_t)
	allow postfix_user_domtrans postfix_$1_t:fd use;
	allow postfix_$1_t postfix_user_domtrans:fd use;
	allow postfix_$1_t postfix_user_domtrans:fifo_file rw_file_perms;
	allow postfix_$1_t postfix_user_domtrans:process sigchld;

	domain_use_wide_inherit_fd(postfix_$1_t)
')

template(`postfix_per_userdomain_template',`
	gen_require(`
		attribute postfix_user_domains;
	')

	# cjp: perhaps this should actually be $3
	# instead of just sysadm_r?
	#role sysadm_r types postfix_user_domains;

	allow postfix_user_domains $2:process sigchld;
	allow postfix_user_domains $2:fifo_file { write getattr };
	allow postfix_user_domains $2:fd use;
')

template(`postfix_public_domain_template',`
	postfix_server_domain_template($1)

	allow postfix_$1_t postfix_public_t:dir search;
')

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

	allow $1 postfix_etc_t:dir { getattr read search };
	allow $1 postfix_etc_t:file { read getattr };
	allow $1 postfix_etc_t:lnk_file { getattr read };
	files_search_etc($1)
')

########################################
## <summary>
##	Create files with the specified type in
##	the postfix configuration directories.
## </summary>
## <param name="domain">
##	Domain allowed access.
## </param>
## <param name="private type">
##	The type of the object to be created.
## </param>
## <param name="object" optional="true">
##	The object class of the object being created.  If
##	no class is specified, file will be used.
## </param>
#
interface(`postfix_create_config',`
	gen_require(`
		type postfix_etc_t;
	')

	files_search_etc($1)
	allow $1 postfix_etc_t:dir rw_dir_perms;

	ifelse(`$3',`',`
		type_transition $1 postfix_etc_t:file $2;
	',`
		type_transition $1 postfix_etc_t:$3 $2;
	')
')

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

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

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

	domain_auto_trans($1,postfix_map_exec_t,postfix_map_t)

	allow $1 postfix_map_t:fd use;
	allow postfix_map_t $1:fd use;
	allow postfix_map_t $1:fifo_file rw_file_perms;
	allow postfix_map_t $1:process sigchld;
')

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

	postfix_domtrans_map($1)
	role $2 types postfix_map_t;
	allow postfix_map_t $3:chr_file rw_term_perms;
')

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

	domain_auto_trans($1,postfix_master_exec_t,postfix_master_t)

	allow $1 postfix_master_t:fd use;
	allow postfix_master_t $1:fd use;
	allow postfix_master_t $1:fifo_file rw_file_perms;
	allow postfix_master_t $1:process sigchld;
')

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

	can_exec($1,postfix_master_exec_t)
')

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

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

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

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

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

	typeattribute $1 postfix_user_domtrans;
')