policy_module(postgresql, 1.8.1)

gen_require(`
	class db_database all_db_database_perms;
	class db_table all_db_table_perms;
	class db_procedure all_db_procedure_perms;
	class db_column all_db_column_perms;
	class db_tuple all_db_tuple_perms;
	class db_blob all_db_blob_perms;
')

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

## <desc>
## <p>
## Allow unprived users to execute DDL statement
## </p>
## </desc>
gen_tunable(sepgsql_enable_users_ddl, true)

type postgresql_t;
type postgresql_exec_t;
init_daemon_domain(postgresql_t, postgresql_exec_t)

type postgresql_db_t;
files_type(postgresql_db_t)

type postgresql_etc_t;
files_config_file(postgresql_etc_t)

type postgresql_lock_t;
files_lock_file(postgresql_lock_t)

type postgresql_log_t;
logging_log_file(postgresql_log_t)

type postgresql_tmp_t;
files_tmp_file(postgresql_tmp_t)

type postgresql_var_run_t;
files_pid_file(postgresql_var_run_t)

# database clients attribute
attribute sepgsql_client_type;
attribute sepgsql_unconfined_type;

# database objects attribute
attribute sepgsql_database_type;
attribute sepgsql_table_type;
attribute sepgsql_sysobj_table_type;
attribute sepgsql_procedure_type;
attribute sepgsql_blob_type;
attribute sepgsql_module_type;

# database object types
type sepgsql_blob_t;
postgresql_blob_object(sepgsql_blob_t)

type sepgsql_db_t;
postgresql_database_object(sepgsql_db_t)

type sepgsql_fixed_table_t;
postgresql_table_object(sepgsql_fixed_table_t)

type sepgsql_proc_t;
postgresql_procedure_object(sepgsql_proc_t)

type sepgsql_ro_blob_t;
postgresql_blob_object(sepgsql_ro_blob_t)

type sepgsql_ro_table_t;
postgresql_table_object(sepgsql_ro_table_t)

type sepgsql_secret_blob_t;
postgresql_blob_object(sepgsql_secret_blob_t)

type sepgsql_secret_table_t;
postgresql_table_object(sepgsql_secret_table_t)

type sepgsql_sysobj_t;
postgresql_system_table_object(sepgsql_sysobj_t)

type sepgsql_table_t;
postgresql_table_object(sepgsql_table_t)

type sepgsql_trusted_proc_exec_t;
postgresql_procedure_object(sepgsql_trusted_proc_exec_t)

# Trusted Procedure Domain
type sepgsql_trusted_proc_t;
domain_type(sepgsql_trusted_proc_t)
postgresql_unconfined(sepgsql_trusted_proc_t)
role system_r types sepgsql_trusted_proc_t;

type user_sepgsql_blob_t;
typealias user_sepgsql_blob_t alias { staff_sepgsql_blob_t sysadm_sepgsql_blob_t };
typealias user_sepgsql_blob_t alias { auditadm_sepgsql_blob_t secadm_sepgsql_blob_t };
postgresql_blob_object(user_sepgsql_blob_t)

type user_sepgsql_proc_exec_t;
typealias user_sepgsql_proc_exec_t alias { staff_sepgsql_proc_exec_t sysadm_sepgsql_proc_exec_t };
typealias user_sepgsql_proc_exec_t alias { auditadm_sepgsql_proc_exec_t secadm_sepgsql_proc_exec_t };
postgresql_procedure_object(user_sepgsql_proc_exec_t)

type user_sepgsql_sysobj_t;
typealias user_sepgsql_sysobj_t alias { staff_sepgsql_sysobj_t sysadm_sepgsql_sysobj_t };
typealias user_sepgsql_sysobj_t alias { auditadm_sepgsql_sysobj_t secadm_sepgsql_sysobj_t };
postgresql_system_table_object(user_sepgsql_sysobj_t)

type user_sepgsql_table_t;
typealias user_sepgsql_table_t alias { staff_sepgsql_table_t sysadm_sepgsql_table_t };
typealias user_sepgsql_table_t alias { auditadm_sepgsql_table_t secadm_sepgsql_table_t };
postgresql_table_object(user_sepgsql_table_t)

########################################
#
# postgresql Local policy
#
allow postgresql_t self:capability { kill dac_override dac_read_search chown fowner fsetid setuid setgid sys_nice sys_tty_config sys_admin };
dontaudit postgresql_t self:capability { sys_tty_config sys_admin };
allow postgresql_t self:process signal_perms;
allow postgresql_t self:fifo_file rw_fifo_file_perms;
allow postgresql_t self:sem create_sem_perms;
allow postgresql_t self:shm create_shm_perms;
allow postgresql_t self:tcp_socket create_stream_socket_perms;
allow postgresql_t self:udp_socket create_stream_socket_perms;
allow postgresql_t self:unix_dgram_socket create_socket_perms;
allow postgresql_t self:unix_stream_socket create_stream_socket_perms;
allow postgresql_t self:netlink_selinux_socket create_socket_perms;

allow postgresql_t sepgsql_database_type:db_database *;
type_transition postgresql_t postgresql_t:db_database sepgsql_db_t;

allow postgresql_t sepgsql_module_type:db_database install_module;
# Database/Loadable module
allow sepgsql_database_type sepgsql_module_type:db_database load_module;

allow postgresql_t sepgsql_table_type:{ db_table db_column db_tuple } *;
type_transition postgresql_t sepgsql_database_type:db_table sepgsql_sysobj_t;

allow postgresql_t sepgsql_procedure_type:db_procedure *;
type_transition postgresql_t sepgsql_database_type:db_procedure sepgsql_proc_t;

allow postgresql_t sepgsql_blob_type:db_blob *;
type_transition postgresql_t sepgsql_database_type:db_blob sepgsql_blob_t;

manage_dirs_pattern(postgresql_t, postgresql_db_t, postgresql_db_t)
manage_files_pattern(postgresql_t, postgresql_db_t, postgresql_db_t)
manage_lnk_files_pattern(postgresql_t, postgresql_db_t, postgresql_db_t)
manage_fifo_files_pattern(postgresql_t, postgresql_db_t, postgresql_db_t)
manage_sock_files_pattern(postgresql_t, postgresql_db_t, postgresql_db_t)
files_var_lib_filetrans(postgresql_t, postgresql_db_t, { dir file lnk_file sock_file fifo_file })

allow postgresql_t postgresql_etc_t:dir list_dir_perms;
read_files_pattern(postgresql_t, postgresql_etc_t, postgresql_etc_t)
read_lnk_files_pattern(postgresql_t, postgresql_etc_t, postgresql_etc_t)

allow postgresql_t postgresql_exec_t:lnk_file { getattr read };
can_exec(postgresql_t, postgresql_exec_t )

allow postgresql_t postgresql_lock_t:file manage_file_perms;
files_lock_filetrans(postgresql_t,postgresql_lock_t,file)

manage_files_pattern(postgresql_t, postgresql_log_t, postgresql_log_t)
logging_log_filetrans(postgresql_t, postgresql_log_t, { file dir })

manage_dirs_pattern(postgresql_t, postgresql_tmp_t, postgresql_tmp_t)
manage_files_pattern(postgresql_t, postgresql_tmp_t, postgresql_tmp_t)
manage_lnk_files_pattern(postgresql_t, postgresql_tmp_t, postgresql_tmp_t)
manage_fifo_files_pattern(postgresql_t, postgresql_tmp_t, postgresql_tmp_t)
manage_sock_files_pattern(postgresql_t, postgresql_tmp_t, postgresql_tmp_t)
files_tmp_filetrans(postgresql_t, postgresql_tmp_t, { dir file sock_file })
fs_tmpfs_filetrans(postgresql_t, postgresql_tmp_t, { dir file lnk_file sock_file fifo_file })

manage_files_pattern(postgresql_t, postgresql_var_run_t, postgresql_var_run_t)
manage_sock_files_pattern(postgresql_t, postgresql_var_run_t, postgresql_var_run_t)
files_pid_filetrans(postgresql_t, postgresql_var_run_t, file)

kernel_read_kernel_sysctls(postgresql_t)
kernel_read_system_state(postgresql_t)
kernel_list_proc(postgresql_t)
kernel_read_all_sysctls(postgresql_t)
kernel_read_proc_symlinks(postgresql_t)

corenet_all_recvfrom_unlabeled(postgresql_t)
corenet_all_recvfrom_netlabel(postgresql_t)
corenet_tcp_sendrecv_generic_if(postgresql_t)
corenet_udp_sendrecv_generic_if(postgresql_t)
corenet_tcp_sendrecv_all_nodes(postgresql_t)
corenet_udp_sendrecv_all_nodes(postgresql_t)
corenet_tcp_sendrecv_all_ports(postgresql_t)
corenet_udp_sendrecv_all_ports(postgresql_t)
corenet_tcp_bind_all_nodes(postgresql_t)
corenet_tcp_bind_postgresql_port(postgresql_t)
corenet_tcp_connect_auth_port(postgresql_t)
corenet_sendrecv_postgresql_server_packets(postgresql_t)
corenet_sendrecv_auth_client_packets(postgresql_t)

dev_read_sysfs(postgresql_t)
dev_read_urand(postgresql_t)

fs_getattr_all_fs(postgresql_t)
fs_search_auto_mountpoints(postgresql_t)
fs_rw_hugetlbfs_files(postgresql_t)

selinux_get_enforce_mode(postgresql_t)
selinux_validate_context(postgresql_t)
selinux_compute_access_vector(postgresql_t)
selinux_compute_create_context(postgresql_t)
selinux_compute_relabel_context(postgresql_t)

term_use_controlling_term(postgresql_t)

corecmd_exec_bin(postgresql_t)
corecmd_exec_shell(postgresql_t)

domain_dontaudit_list_all_domains_state(postgresql_t)
domain_use_interactive_fds(postgresql_t)

files_dontaudit_search_home(postgresql_t)
files_manage_etc_files(postgresql_t)
files_search_etc(postgresql_t)
files_read_etc_runtime_files(postgresql_t)
files_read_usr_files(postgresql_t)

auth_use_nsswitch(postgresql_t)

init_read_utmp(postgresql_t)

logging_send_syslog_msg(postgresql_t)

miscfiles_read_localization(postgresql_t)

seutil_libselinux_linked(postgresql_t)

userdom_dontaudit_use_unpriv_user_fds(postgresql_t)
userdom_dontaudit_search_user_home_dirs(postgresql_t)
userdom_dontaudit_use_user_terminals(postgresql_t)

mta_getattr_spool(postgresql_t)

tunable_policy(`allow_execmem',`
	allow postgresql_t self:process execmem;
')

optional_policy(`
	consoletype_exec(postgresql_t)
')

optional_policy(`
	cron_search_spool(postgresql_t)
	cron_system_entry(postgresql_t,postgresql_exec_t)
')

optional_policy(`
	hostname_exec(postgresql_t)
')

optional_policy(`
	ipsec_match_default_spd(postgresql_t)
')

optional_policy(`
	kerberos_use(postgresql_t)
')

optional_policy(`
	seutil_sigchld_newrole(postgresql_t)
')

optional_policy(`
	udev_read_db(postgresql_t)
')

########################################
#
# Rules common to all clients
#

allow sepgsql_client_type sepgsql_db_t:db_database { getattr access get_param set_param };
type_transition sepgsql_client_type sepgsql_client_type:db_database sepgsql_db_t;

allow sepgsql_client_type sepgsql_fixed_table_t:db_table { getattr use select insert };
allow sepgsql_client_type sepgsql_fixed_table_t:db_column { getattr use select insert };
allow sepgsql_client_type sepgsql_fixed_table_t:db_tuple { use select insert };

allow sepgsql_client_type sepgsql_table_t:db_table { getattr use select update insert delete };
allow sepgsql_client_type sepgsql_table_t:db_column { getattr use select update insert };
allow sepgsql_client_type sepgsql_table_t:db_tuple { use select update insert delete };

allow sepgsql_client_type sepgsql_ro_table_t:db_table { getattr use select };
allow sepgsql_client_type sepgsql_ro_table_t:db_column { getattr use select };
allow sepgsql_client_type sepgsql_ro_table_t:db_tuple { use select };

allow sepgsql_client_type sepgsql_secret_table_t:db_table getattr;
allow sepgsql_client_type sepgsql_secret_table_t:db_column getattr;

allow sepgsql_client_type sepgsql_sysobj_t:db_table { getattr use select };
allow sepgsql_client_type sepgsql_sysobj_t:db_column { getattr use select };
allow sepgsql_client_type sepgsql_sysobj_t:db_tuple { use select };

allow sepgsql_client_type sepgsql_proc_t:db_procedure { getattr execute };
allow sepgsql_client_type sepgsql_trusted_proc_t:db_procedure { getattr execute entrypoint };

allow sepgsql_client_type sepgsql_blob_t:db_blob { create drop getattr setattr read write };
allow sepgsql_client_type sepgsql_ro_blob_t:db_blob { getattr read };
allow sepgsql_client_type sepgsql_secret_blob_t:db_blob getattr;

# The purpose of the dontaudit rule in row-level access control is to prevent a flood of logs.
# If a client tries to SELECT a table including violated tuples, these are filtered from
# the result set as if not exist, but its access denied longs can be recorded within log files.
# In generally, the number of tuples are much larger than the number of columns, tables and so on.
# So, it makes a flood of logs when many tuples are violated.
#
# The default policy does not prevent anything for sepgsql_client_type sepgsql_unconfined_type,
# so we don't need "dontaudit" rules in Type-Enforcement. However, MLS/MCS can prevent them
# to access classified tuples and can make a audit record.
#
# Therefore, the following rule is applied for any domains which can connect SE-PostgreSQL.
dontaudit { postgresql_t sepgsql_client_type sepgsql_unconfined_type } { sepgsql_table_type -sepgsql_sysobj_table_type }:db_tuple { use select update insert delete };

tunable_policy(`sepgsql_enable_users_ddl',`
	allow sepgsql_client_type sepgsql_table_t:db_table { create drop setattr };
	allow sepgsql_client_type sepgsql_table_t:db_column { create drop setattr };
	allow sepgsql_client_type sepgsql_sysobj_t:db_tuple { update insert delete };
')

########################################
#
# Unconfined access to this module
#

allow sepgsql_unconfined_type sepgsql_database_type:db_database *;
type_transition sepgsql_unconfined_type sepgsql_unconfined_type:db_database sepgsql_db_t;

type_transition sepgsql_unconfined_type sepgsql_database_type:db_table sepgsql_table_t;
type_transition sepgsql_unconfined_type sepgsql_database_type:db_procedure sepgsql_proc_t;
type_transition sepgsql_unconfined_type sepgsql_database_type:db_blob sepgsql_blob_t;

allow sepgsql_unconfined_type sepgsql_table_type:{ db_table db_column db_tuple } *;

# unconfined domain is not allowed to invoke user defined procedure directly.
# They have to confirm and relabel it at first.
allow sepgsql_unconfined_type { sepgsql_proc_t sepgsql_trusted_proc_t }:db_procedure *;
allow sepgsql_unconfined_type sepgsql_procedure_type:db_procedure { create drop getattr setattr relabelfrom relabelto };

allow sepgsql_unconfined_type sepgsql_blob_type:db_blob *;

allow sepgsql_unconfined_type sepgsql_module_type:db_database install_module;

kernel_relabelfrom_unlabeled_database(sepgsql_unconfined_type)