policy_module(squid, 1.17.2)

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

## <desc>
##	<p>
##	Determine whether squid can
##	connect to all TCP ports.
##	</p>
## </desc>
gen_tunable(squid_connect_any, false)

## <desc>
##	<p>
##	Determine whether squid can run
##	as a transparent proxy.
##	</p>
## </desc>
gen_tunable(squid_use_tproxy, false)

## <desc>
##	<p>
##	Determine whether squid can use the
##	pinger daemon (needs raw net access)
##	</p>
## </desc>
gen_tunable(squid_use_pinger, true)

type squid_t;
type squid_exec_t;
init_daemon_domain(squid_t, squid_exec_t)

type squid_cache_t;
files_type(squid_cache_t)

type squid_conf_t;
files_type(squid_conf_t)

type squid_initrc_exec_t;
init_script_file(squid_initrc_exec_t)

type squid_log_t;
logging_log_file(squid_log_t)

type squid_runtime_t alias squid_var_run_t;
files_pid_file(squid_runtime_t)

type squid_tmp_t;
files_tmp_file(squid_tmp_t)

type squid_tmpfs_t;
files_tmpfs_file(squid_tmpfs_t)

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

allow squid_t self:capability { dac_override kill setgid setuid sys_resource };
dontaudit squid_t self:capability sys_tty_config;
allow squid_t self:process { transition signal_perms getsched setsched getsession getpgid setpgid getcap setcap share getattr noatsecure siginh setrlimit rlimitinh dyntransition setkeycreate setsockcreate getrlimit };
allow squid_t self:fifo_file rw_fifo_file_perms;
allow squid_t self:fd use;
allow squid_t self:shm create_shm_perms;
allow squid_t self:sem create_sem_perms;
allow squid_t self:msgq create_msgq_perms;
allow squid_t self:msg { send receive };
allow squid_t self:unix_dgram_socket sendto;
allow squid_t self:unix_stream_socket { accept connectto listen };
allow squid_t self:tcp_socket { accept listen };

manage_dirs_pattern(squid_t, squid_cache_t, squid_cache_t)
manage_files_pattern(squid_t, squid_cache_t, squid_cache_t)
manage_lnk_files_pattern(squid_t, squid_cache_t, squid_cache_t)
files_var_filetrans(squid_t, squid_cache_t, dir, "squid")

allow squid_t squid_conf_t:dir list_dir_perms;
allow squid_t squid_conf_t:file read_file_perms;
allow squid_t squid_conf_t:lnk_file read_lnk_file_perms;

manage_dirs_pattern(squid_t, squid_log_t, squid_log_t)
manage_files_pattern(squid_t, squid_log_t, squid_log_t)
manage_lnk_files_pattern(squid_t, squid_log_t, squid_log_t)
logging_log_filetrans(squid_t, squid_log_t, { file dir })

manage_dirs_pattern(squid_t, squid_tmp_t, squid_tmp_t)
manage_files_pattern(squid_t, squid_tmp_t, squid_tmp_t)
files_tmp_filetrans(squid_t, squid_tmp_t, { file dir })

manage_files_pattern(squid_t, squid_tmpfs_t, squid_tmpfs_t)
fs_tmpfs_filetrans(squid_t, squid_tmpfs_t, file)

manage_files_pattern(squid_t, squid_runtime_t, squid_runtime_t)
files_pid_filetrans(squid_t, squid_runtime_t, file)

can_exec(squid_t, squid_exec_t)

kernel_read_kernel_sysctls(squid_t)
kernel_read_system_state(squid_t)
kernel_read_network_state(squid_t)

corenet_all_recvfrom_unlabeled(squid_t)
corenet_all_recvfrom_netlabel(squid_t)
corenet_tcp_sendrecv_generic_if(squid_t)
corenet_udp_sendrecv_generic_if(squid_t)
corenet_tcp_sendrecv_generic_node(squid_t)
corenet_udp_sendrecv_generic_node(squid_t)
corenet_tcp_bind_generic_node(squid_t)
corenet_udp_bind_generic_node(squid_t)

corenet_sendrecv_http_client_packets(squid_t)
corenet_tcp_connect_http_port(squid_t)
corenet_sendrecv_http_server_packets(squid_t)
corenet_tcp_bind_http_port(squid_t)

corenet_sendrecv_http_cache_client_packets(squid_t)
corenet_tcp_connect_http_cache_port(squid_t)
corenet_sendrecv_http_cache_server_packets(squid_t)
corenet_tcp_bind_http_cache_port(squid_t)
corenet_udp_bind_http_cache_port(squid_t)

corenet_sendrecv_ftp_client_packets(squid_t)
corenet_tcp_connect_ftp_port(squid_t)
corenet_sendrecv_ftp_server_packets(squid_t)
corenet_tcp_bind_ftp_port(squid_t)

corenet_sendrecv_gopher_client_packets(squid_t)
corenet_tcp_connect_gopher_port(squid_t)
corenet_sendrecv_gopher_server_packets(squid_t)
corenet_tcp_bind_gopher_port(squid_t)
corenet_udp_bind_gopher_port(squid_t)

corenet_sendrecv_squid_server_packets(squid_t)
corenet_tcp_bind_squid_port(squid_t)
corenet_udp_bind_squid_port(squid_t)

corenet_sendrecv_wccp_server_packets(squid_t)
corenet_udp_bind_wccp_port(squid_t)

corenet_sendrecv_pgpkeyserver_client_packets(squid_t)
corenet_tcp_connect_pgpkeyserver_port(squid_t)

corecmd_exec_bin(squid_t)
corecmd_exec_shell(squid_t)

dev_read_sysfs(squid_t)
dev_read_urand(squid_t)

domain_use_interactive_fds(squid_t)

files_read_etc_runtime_files(squid_t)
files_read_usr_files(squid_t)
files_search_spool(squid_t)
files_dontaudit_getattr_tmp_dirs(squid_t)
files_getattr_home_dir(squid_t)
files_dontaudit_getattr_boot_dirs(squid_t)

fs_getattr_all_fs(squid_t)
fs_search_auto_mountpoints(squid_t)
fs_list_inotifyfs(squid_t)

selinux_dontaudit_getattr_dir(squid_t)

term_dontaudit_getattr_pty_dirs(squid_t)

auth_use_nsswitch(squid_t)
auth_domtrans_chk_passwd(squid_t)

libs_exec_lib_files(squid_t)

logging_send_syslog_msg(squid_t)

miscfiles_read_generic_certs(squid_t)
miscfiles_read_localization(squid_t)
miscfiles_read_generic_tls_privkey(squid_t)

userdom_use_unpriv_users_fds(squid_t)
userdom_dontaudit_search_user_home_dirs(squid_t)

tunable_policy(`squid_connect_any',`
	corenet_tcp_connect_all_ports(squid_t)
	corenet_tcp_bind_all_ports(squid_t)
	corenet_sendrecv_all_packets(squid_t)
')

tunable_policy(`squid_use_pinger',`
	allow squid_t self:rawip_socket connected_socket_perms;
	allow squid_t self:capability net_raw;
')

tunable_policy(`squid_use_tproxy',`
	allow squid_t self:capability net_admin;
	corenet_sendrecv_netport_server_packets(squid_t)
	corenet_tcp_bind_netport_port(squid_t)
')

optional_policy(`
	apache_content_template(squid)

	corenet_all_recvfrom_unlabeled(httpd_squid_script_t)
	corenet_all_recvfrom_netlabel(httpd_squid_script_t)
	corenet_tcp_sendrecv_generic_if(httpd_squid_script_t)
	corenet_tcp_sendrecv_generic_node(httpd_squid_script_t)

	corenet_sendrecv_http_cache_client_packets(httpd_squid_script_t)
	corenet_tcp_connect_http_cache_port(httpd_squid_script_t)

	sysnet_dns_name_resolve(httpd_squid_script_t)

	squid_read_config(httpd_squid_script_t)
')

optional_policy(`
	cron_system_entry(squid_t, squid_exec_t)
')

optional_policy(`
	kerberos_manage_host_rcache(squid_t)
	kerberos_tmp_filetrans_host_rcache(squid_t, file, "host_0")
')

optional_policy(`
	mysql_stream_connect(squid_t)
')

optional_policy(`
	samba_domtrans_winbind_helper(squid_t)
')

optional_policy(`
	seutil_sigchld_newrole(squid_t)
')

optional_policy(`
	udev_read_db(squid_t)
')