policy_module(courier, 1.20.0)

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

attribute courier_domain;

courier_domain_template(authdaemon)
courier_domain_template(pcp)
courier_domain_template(pop)
courier_domain_template(tcpd)
courier_domain_template(sqwebmail)

type courier_etc_t;
files_config_file(courier_etc_t)

type courier_runtime_t alias courier_var_run_t;
files_runtime_file(courier_runtime_t)

type courier_spool_t;
files_type(courier_spool_t)

type courier_var_lib_t;
files_type(courier_var_lib_t)

type courier_exec_t;
mta_agent_executable(courier_exec_t)

########################################
#
# Common local policy
#

allow courier_domain self:capability dac_override;
dontaudit courier_domain self:capability sys_tty_config;
allow courier_domain self:process { setpgid signal_perms };
allow courier_domain self:fifo_file rw_fifo_file_perms;
allow courier_domain self:tcp_socket create_stream_socket_perms;
allow courier_domain self:udp_socket create_socket_perms;

read_files_pattern(courier_domain, courier_etc_t, courier_etc_t)
allow courier_domain courier_etc_t:dir list_dir_perms;

manage_dirs_pattern(courier_domain, courier_runtime_t, courier_runtime_t)
manage_files_pattern(courier_domain, courier_runtime_t, courier_runtime_t)
manage_lnk_files_pattern(courier_domain, courier_runtime_t, courier_runtime_t)
manage_sock_files_pattern(courier_domain, courier_runtime_t, courier_runtime_t)
files_runtime_filetrans(courier_domain, courier_runtime_t, dir)

kernel_read_kernel_sysctls(courier_domain)
kernel_read_system_state(courier_domain)

corecmd_exec_bin(courier_domain)

dev_read_sysfs(courier_domain)

domain_use_interactive_fds(courier_domain)

files_read_etc_files(courier_domain)
files_read_etc_runtime_files(courier_domain)
files_read_usr_files(courier_domain)

fs_getattr_xattr_fs(courier_domain)
fs_search_auto_mountpoints(courier_domain)

logging_send_syslog_msg(courier_domain)

sysnet_read_config(courier_domain)

userdom_dontaudit_use_unpriv_user_fds(courier_domain)

optional_policy(`
	seutil_sigchld_newrole(courier_domain)
')

########################################
#
# Authdaemon local policy
#

allow courier_authdaemon_t self:capability { setgid setuid sys_tty_config };
allow courier_authdaemon_t self:unix_stream_socket { accept connectto listen };

create_dirs_pattern(courier_authdaemon_t, courier_var_lib_t, courier_var_lib_t)
manage_sock_files_pattern(courier_authdaemon_t, courier_var_lib_t, courier_var_lib_t)

manage_sock_files_pattern(courier_authdaemon_t, courier_spool_t, courier_spool_t)

allow courier_authdaemon_t courier_tcpd_t:process sigchld;
allow courier_authdaemon_t courier_tcpd_t:fd use;
allow courier_authdaemon_t courier_tcpd_t:fifo_file rw_fifo_file_perms;
allow courier_authdaemon_t courier_tcpd_t:tcp_socket rw_stream_socket_perms;
allow courier_authdaemon_t courier_tcpd_t:unix_stream_socket rw_stream_socket_perms;

can_exec(courier_authdaemon_t, courier_exec_t)

corecmd_exec_shell(courier_authdaemon_t)

domtrans_pattern(courier_authdaemon_t, courier_pop_exec_t, courier_pop_t)

dev_read_urand(courier_authdaemon_t)

files_getattr_tmp_dirs(courier_authdaemon_t)
files_search_spool(courier_authdaemon_t)

auth_domtrans_chk_passwd(courier_authdaemon_t)

libs_read_lib_files(courier_authdaemon_t)

miscfiles_read_localization(courier_authdaemon_t)

selinux_getattr_fs(courier_authdaemon_t)

userdom_dontaudit_search_user_home_dirs(courier_authdaemon_t)

########################################
#
# Calendar (PCP) local policy
#

allow courier_pcp_t self:capability { setgid setuid };

dev_read_rand(courier_pcp_t)

########################################
#
# POP3/IMAP local policy
#

allow courier_pop_t self:capability { setgid setuid };
allow courier_pop_t courier_authdaemon_t:tcp_socket rw_stream_socket_perms;
allow courier_pop_t courier_authdaemon_t:process sigchld;

allow courier_pop_t courier_tcpd_t:{ unix_stream_socket tcp_socket } rw_stream_socket_perms;

allow courier_pop_t courier_var_lib_t:file rw_inherited_file_perms;

stream_connect_pattern(courier_pop_t, courier_var_lib_t, courier_var_lib_t, courier_authdaemon_t)

domtrans_pattern(courier_pop_t, courier_authdaemon_exec_t, courier_authdaemon_t)

corecmd_exec_shell(courier_pop_t)

miscfiles_read_localization(courier_pop_t)

mta_manage_mail_home_rw_content(courier_pop_t)

########################################
#
# TCPd local policy
#

allow courier_tcpd_t self:capability kill;

manage_files_pattern(courier_tcpd_t, courier_var_lib_t, courier_var_lib_t)
manage_lnk_files_pattern(courier_tcpd_t, courier_var_lib_t, courier_var_lib_t)
files_search_var_lib(courier_tcpd_t)

can_exec(courier_tcpd_t, courier_exec_t)

domtrans_pattern(courier_tcpd_t, courier_pop_exec_t, courier_pop_t)

corenet_all_recvfrom_netlabel(courier_tcpd_t)
corenet_tcp_sendrecv_generic_if(courier_tcpd_t)
corenet_tcp_sendrecv_generic_node(courier_tcpd_t)
corenet_tcp_bind_generic_node(courier_tcpd_t)

corenet_sendrecv_pop_server_packets(courier_tcpd_t)
corenet_tcp_bind_pop_port(courier_tcpd_t)

dev_read_rand(courier_tcpd_t)
dev_read_urand(courier_tcpd_t)

miscfiles_read_localization(courier_tcpd_t)

########################################
#
# Webmail local policy
#

kernel_read_kernel_sysctls(courier_sqwebmail_t)

dev_read_urand(courier_sqwebmail_t)

optional_policy(`
	cron_system_entry(courier_sqwebmail_t, courier_sqwebmail_exec_t)
')
