policy_module(dovecot, 1.27.1)

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

## <desc>
##      <p>
##      Determine whether dovecot can connect to
##      databases.
##      </p>
## </desc>
gen_tunable(dovecot_can_connect_db, false)

attribute dovecot_domain;

type dovecot_t, dovecot_domain;
type dovecot_exec_t;
init_daemon_domain(dovecot_t, dovecot_exec_t)

type dovecot_auth_t, dovecot_domain;
type dovecot_auth_exec_t;
domain_type(dovecot_auth_t)
domain_entry_file(dovecot_auth_t, dovecot_auth_exec_t)
role system_r types dovecot_auth_t;

type dovecot_auth_tmp_t;
files_tmp_file(dovecot_auth_tmp_t)

type dovecot_cert_t;
miscfiles_cert_type(dovecot_cert_t)

type dovecot_deliver_t, dovecot_domain;
type dovecot_deliver_exec_t;
domain_type(dovecot_deliver_t)
domain_entry_file(dovecot_deliver_t, dovecot_deliver_exec_t)
role system_r types dovecot_deliver_t;

type dovecot_deliver_tmp_t;
files_tmp_file(dovecot_deliver_tmp_t)

type dovecot_etc_t;
files_config_file(dovecot_etc_t)

type dovecot_initrc_exec_t;
init_script_file(dovecot_initrc_exec_t)

type dovecot_keytab_t;
files_type(dovecot_keytab_t)

type dovecot_passwd_t;
files_type(dovecot_passwd_t)

type dovecot_runtime_t alias dovecot_var_run_t;
files_runtime_file(dovecot_runtime_t)

type dovecot_spool_t;
files_type(dovecot_spool_t)

type dovecot_tmp_t;
files_tmp_file(dovecot_tmp_t)

type dovecot_var_lib_t;
files_type(dovecot_var_lib_t)

type dovecot_var_log_t;
logging_log_file(dovecot_var_log_t)

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

allow dovecot_domain self:capability2 block_suspend;
allow dovecot_domain self:fifo_file rw_fifo_file_perms;

allow dovecot_domain dovecot_etc_t:dir list_dir_perms;
allow dovecot_domain dovecot_etc_t:file read_file_perms;
allow dovecot_domain dovecot_etc_t:lnk_file read_lnk_file_perms;

kernel_read_all_sysctls(dovecot_domain)
kernel_read_system_state(dovecot_domain)

corecmd_exec_bin(dovecot_domain)
corecmd_exec_shell(dovecot_domain)

dev_read_sysfs(dovecot_domain)
dev_read_rand(dovecot_domain)
dev_read_urand(dovecot_domain)

files_read_etc_runtime_files(dovecot_domain)

logging_send_syslog_msg(dovecot_domain)

miscfiles_read_localization(dovecot_domain)

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

allow dovecot_t self:capability { chown dac_override dac_read_search fsetid kill setgid setuid sys_chroot sys_resource };
dontaudit dovecot_t self:capability sys_tty_config;
allow dovecot_t self:process { setrlimit signal_perms getcap setcap setsched };
allow dovecot_t self:tcp_socket { accept listen };
allow dovecot_t self:unix_stream_socket { accept connectto listen };

allow dovecot_t dovecot_cert_t:dir list_dir_perms;
allow dovecot_t dovecot_cert_t:file read_file_perms;
allow dovecot_t dovecot_cert_t:lnk_file read_lnk_file_perms;

allow dovecot_t dovecot_keytab_t:file read_file_perms;

manage_dirs_pattern(dovecot_t, dovecot_tmp_t, dovecot_tmp_t)
manage_files_pattern(dovecot_t, dovecot_tmp_t, dovecot_tmp_t)
files_tmp_filetrans(dovecot_t, dovecot_tmp_t, { file dir })

manage_files_pattern(dovecot_t, dovecot_var_lib_t, dovecot_var_lib_t)

manage_dirs_pattern(dovecot_t, dovecot_var_log_t, dovecot_var_log_t)
append_files_pattern(dovecot_t, dovecot_var_log_t, dovecot_var_log_t)
create_files_pattern(dovecot_t, dovecot_var_log_t, dovecot_var_log_t)
setattr_files_pattern(dovecot_t, dovecot_var_log_t, dovecot_var_log_t)
logging_log_filetrans(dovecot_t, dovecot_var_log_t, { file dir })

manage_dirs_pattern(dovecot_t, dovecot_spool_t, dovecot_spool_t)
manage_files_pattern(dovecot_t, dovecot_spool_t, dovecot_spool_t)
manage_lnk_files_pattern(dovecot_t, dovecot_spool_t, dovecot_spool_t)

manage_dirs_pattern(dovecot_t, dovecot_runtime_t, dovecot_runtime_t)
manage_files_pattern(dovecot_t, dovecot_runtime_t, dovecot_runtime_t)
manage_lnk_files_pattern(dovecot_t, dovecot_runtime_t, dovecot_runtime_t)
manage_sock_files_pattern(dovecot_t, dovecot_runtime_t, dovecot_runtime_t)
manage_fifo_files_pattern(dovecot_t, dovecot_runtime_t, dovecot_runtime_t)
files_runtime_filetrans(dovecot_t, dovecot_runtime_t, { dir file fifo_file })

can_exec(dovecot_t, dovecot_exec_t)

allow dovecot_t dovecot_auth_t:process signal;

domtrans_pattern(dovecot_t, dovecot_auth_exec_t, dovecot_auth_t)

corenet_all_recvfrom_netlabel(dovecot_t)
corenet_tcp_sendrecv_generic_if(dovecot_t)
corenet_tcp_sendrecv_generic_node(dovecot_t)
corenet_tcp_bind_generic_node(dovecot_t)

corenet_sendrecv_lmtp_server_packets(dovecot_t)
corenet_tcp_bind_lmtp_port(dovecot_t)
corenet_sendrecv_mail_server_packets(dovecot_t)
corenet_tcp_bind_mail_port(dovecot_t)
corenet_sendrecv_pop_server_packets(dovecot_t)
corenet_tcp_bind_pop_port(dovecot_t)
corenet_sendrecv_sieve_server_packets(dovecot_t)
corenet_tcp_bind_sieve_port(dovecot_t)

corenet_sendrecv_all_client_packets(dovecot_t)
corenet_tcp_connect_all_ports(dovecot_t)
corenet_tcp_connect_postgresql_port(dovecot_t)

domain_use_interactive_fds(dovecot_t)

files_read_var_lib_files(dovecot_t)
files_read_var_symlinks(dovecot_t)
files_search_spool(dovecot_t)
files_dontaudit_list_default(dovecot_t)
files_dontaudit_search_all_dirs(dovecot_t)
files_search_all_mountpoints(dovecot_t)
files_list_usr(dovecot_t)
files_read_usr_files(dovecot_t)

fs_getattr_all_fs(dovecot_t)
fs_getattr_all_dirs(dovecot_t)
fs_read_tmpfs_symlinks(dovecot_t)
fs_search_auto_mountpoints(dovecot_t)
fs_list_inotifyfs(dovecot_t)

init_getattr_utmp(dovecot_t)

auth_use_nsswitch(dovecot_t)

miscfiles_read_generic_certs(dovecot_t)
miscfiles_read_generic_tls_privkey(dovecot_t)

userdom_dontaudit_use_unpriv_user_fds(dovecot_t)
userdom_use_user_terminals(dovecot_t)

tunable_policy(`use_nfs_home_dirs',`
	fs_manage_nfs_dirs(dovecot_t)
	fs_manage_nfs_files(dovecot_t)
	fs_manage_nfs_symlinks(dovecot_t)
')

tunable_policy(`use_samba_home_dirs',`
	fs_manage_cifs_dirs(dovecot_t)
	fs_manage_cifs_files(dovecot_t)
	fs_manage_cifs_symlinks(dovecot_t)
')

optional_policy(`
	certbot_read_lib(dovecot_t)
')

optional_policy(`
	kerberos_manage_host_rcache(dovecot_t)
	kerberos_read_keytab(dovecot_t)
	kerberos_tmp_filetrans_host_rcache(dovecot_t, file, "imap_0")
	kerberos_use(dovecot_t)
')

optional_policy(`
	mta_manage_spool(dovecot_t)
	mta_watch_spool(dovecot_t)
	mta_manage_mail_home_rw_content(dovecot_t)
	mta_home_filetrans_mail_home_rw(dovecot_t, dir, "Maildir")
	mta_home_filetrans_mail_home_rw(dovecot_t, dir, ".maildir")
')

optional_policy(`
	postgresql_stream_connect(dovecot_t)
')

optional_policy(`
	postfix_manage_private_sockets(dovecot_t)
	postfix_search_spool(dovecot_t)
')

optional_policy(`
	sendmail_domtrans(dovecot_t)
')

optional_policy(`
	# execute the spamassassin or other spamd clients
	# to learn spam and ham
	spamassassin_exec_client(dovecot_t)
')

optional_policy(`
	seutil_sigchld_newrole(dovecot_t)
')

optional_policy(`
	squid_dontaudit_search_cache(dovecot_t)
')

########################################
#
# Auth local policy
#

allow dovecot_auth_t self:capability { chown dac_override ipc_lock setgid setuid sys_nice };
allow dovecot_auth_t self:process { getsched setsched signal_perms getcap setcap };
allow dovecot_auth_t self:unix_stream_socket { accept connectto listen };

read_files_pattern(dovecot_auth_t, dovecot_passwd_t, dovecot_passwd_t)

manage_dirs_pattern(dovecot_auth_t, dovecot_auth_tmp_t, dovecot_auth_tmp_t)
manage_files_pattern(dovecot_auth_t, dovecot_auth_tmp_t, dovecot_auth_tmp_t)
files_tmp_filetrans(dovecot_auth_t, dovecot_auth_tmp_t, { file dir })

allow dovecot_auth_t dovecot_runtime_t:dir list_dir_perms;
allow dovecot_auth_t dovecot_runtime_t:file manage_file_perms;
allow dovecot_auth_t dovecot_runtime_t:fifo_file write_fifo_file_perms;
manage_sock_files_pattern(dovecot_auth_t, dovecot_runtime_t, dovecot_runtime_t)

allow dovecot_auth_t dovecot_t:unix_stream_socket { connectto rw_stream_socket_perms };

kernel_dontaudit_getattr_proc(dovecot_auth_t)

files_search_runtime(dovecot_auth_t)
files_read_usr_files(dovecot_auth_t)
files_read_var_lib_files(dovecot_auth_t)

selinux_get_enforce_mode(dovecot_auth_t)
selinux_get_fs_mount(dovecot_auth_t)

auth_domtrans_chk_passwd(dovecot_auth_t)
auth_use_nsswitch(dovecot_auth_t)

fs_search_tmpfs(dovecot_auth_t)
fs_read_tmpfs_symlinks(dovecot_auth_t)

init_rw_utmp(dovecot_auth_t)
init_rw_inherited_stream_socket(dovecot_auth_t)
init_use_fds(dovecot_auth_t)

logging_send_audit_msgs(dovecot_auth_t)

seutil_search_default_contexts(dovecot_auth_t)

sysnet_use_ldap(dovecot_auth_t)

tunable_policy(`dovecot_can_connect_db',`
        corenet_sendrecv_gds_db_client_packets(dovecot_auth_t)
        corenet_tcp_connect_gds_db_port(dovecot_auth_t)
        corenet_sendrecv_mssql_client_packets(dovecot_auth_t)
        corenet_tcp_connect_mssql_port(dovecot_auth_t)
        corenet_sendrecv_oracledb_client_packets(dovecot_auth_t)
        corenet_tcp_connect_oracledb_port(dovecot_auth_t)
')

optional_policy(`
        tunable_policy(`dovecot_can_connect_db',`
		mysql_stream_connect(dovecot_auth_t)
		mysql_read_config(dovecot_auth_t)
		mysql_tcp_connect(dovecot_auth_t)
	')
')

optional_policy(`
	nis_authenticate(dovecot_auth_t)
')

optional_policy(`
	postfix_manage_private_sockets(dovecot_auth_t)
	postfix_search_spool(dovecot_auth_t)
')

optional_policy(`
        postgresql_unpriv_client(dovecot_auth_t)

        tunable_policy(`dovecot_can_connect_db',`
                postgresql_stream_connect(dovecot_auth_t)
                postgresql_tcp_connect(dovecot_auth_t)
        ')
')

optional_policy(`
	userdom_list_user_tmp(dovecot_auth_t)
	userdom_read_user_tmp_files(dovecot_auth_t)
	userdom_read_user_tmp_symlinks(dovecot_auth_t)
')

########################################
#
# Deliver local policy
#

allow dovecot_deliver_t dovecot_cert_t:dir search_dir_perms;

append_files_pattern(dovecot_deliver_t, dovecot_var_log_t, dovecot_var_log_t)

manage_dirs_pattern(dovecot_deliver_t, dovecot_deliver_tmp_t, dovecot_deliver_tmp_t)
manage_files_pattern(dovecot_deliver_t, dovecot_deliver_tmp_t, dovecot_deliver_tmp_t)
files_tmp_filetrans(dovecot_deliver_t, dovecot_deliver_tmp_t, { file dir })

allow dovecot_deliver_t dovecot_runtime_t:dir list_dir_perms;
allow dovecot_deliver_t dovecot_runtime_t:file read_file_perms;
allow dovecot_deliver_t dovecot_runtime_t:sock_file read_sock_file_perms;

stream_connect_pattern(dovecot_deliver_t, dovecot_runtime_t, dovecot_runtime_t, { dovecot_t dovecot_auth_t })

can_exec(dovecot_deliver_t, dovecot_deliver_exec_t)

allow dovecot_deliver_t dovecot_t:process signull;

fs_getattr_all_fs(dovecot_deliver_t)

auth_use_nsswitch(dovecot_deliver_t)

logging_search_logs(dovecot_deliver_t)

tunable_policy(`use_nfs_home_dirs',`
	fs_manage_nfs_dirs(dovecot_deliver_t)
	fs_manage_nfs_files(dovecot_deliver_t)
	fs_manage_nfs_symlinks(dovecot_deliver_t)
')

tunable_policy(`use_samba_home_dirs',`
	fs_manage_cifs_dirs(dovecot_deliver_t)
	fs_manage_cifs_files(dovecot_deliver_t)
	fs_manage_cifs_symlinks(dovecot_deliver_t)
')

optional_policy(`
	mta_mailserver_delivery(dovecot_deliver_t)
	mta_read_queue(dovecot_deliver_t)
')

optional_policy(`
	postfix_use_fds_master(dovecot_deliver_t)
')

optional_policy(`
	sendmail_domtrans(dovecot_deliver_t)
')