policy_module(ftp, 1.9.0)

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

## <desc>
## <p>
## Allow ftp servers to upload files,  used for public file
## transfer services. Directories must be labeled
## public_content_rw_t.
## </p>
## </desc>
gen_tunable(allow_ftpd_anon_write, false)

## <desc>
## <p>
## Allow ftp servers to login to local users and 
## read/write all files on the system, governed by DAC.
## </p>
## </desc>
gen_tunable(allow_ftpd_full_access, false)

## <desc>
## <p>
## Allow ftp servers to use cifs
## used for public file transfer services.
## </p>
## </desc>
gen_tunable(allow_ftpd_use_cifs, false)

## <desc>
## <p>
## Allow ftp servers to use nfs
## used for public file transfer services.
## </p>
## </desc>
gen_tunable(allow_ftpd_use_nfs, false)

## <desc>
## <p>
## Allow ftp to read and write files in the user home directories
## </p>
## </desc>
gen_tunable(ftp_home_dir, false)

type ftpd_t;
type ftpd_exec_t;
init_daemon_domain(ftpd_t, ftpd_exec_t)

type ftpd_etc_t;
files_config_file(ftpd_etc_t)

type ftpd_initrc_exec_t;
init_script_file(ftpd_initrc_exec_t)

type ftpd_lock_t;
files_lock_file(ftpd_lock_t)

type ftpd_tmp_t;
files_tmp_file(ftpd_tmp_t)

type ftpd_tmpfs_t;
files_tmpfs_file(ftpd_tmpfs_t)

type ftpd_var_run_t;
files_pid_file(ftpd_var_run_t)

type ftpdctl_t;
type ftpdctl_exec_t;
init_system_domain(ftpdctl_t, ftpdctl_exec_t)

type ftpdctl_tmp_t;
files_tmp_file(ftpdctl_tmp_t)

type xferlog_t;
logging_log_file(xferlog_t)

########################################
#
# ftpd local policy
#

allow ftpd_t self:capability { chown fowner fsetid setgid setuid sys_chroot sys_nice sys_resource };
dontaudit ftpd_t self:capability sys_tty_config;
allow ftpd_t self:process signal_perms;
allow ftpd_t self:process { getcap setcap setsched setrlimit };
allow ftpd_t self:fifo_file rw_fifo_file_perms;
allow ftpd_t self:unix_dgram_socket { sendto create_socket_perms };
allow ftpd_t self:unix_stream_socket create_stream_socket_perms;
allow ftpd_t self:tcp_socket create_stream_socket_perms;
allow ftpd_t self:udp_socket create_socket_perms;

allow ftpd_t ftpd_etc_t:file read_file_perms;

allow ftpd_t ftpd_lock_t:file manage_file_perms;
files_lock_filetrans(ftpd_t, ftpd_lock_t, file)

manage_dirs_pattern(ftpd_t, ftpd_tmp_t, ftpd_tmp_t)
manage_files_pattern(ftpd_t, ftpd_tmp_t, ftpd_tmp_t)
files_tmp_filetrans(ftpd_t, ftpd_tmp_t, { file dir })

manage_dirs_pattern(ftpd_t, ftpd_tmpfs_t, ftpd_tmpfs_t)
manage_files_pattern(ftpd_t, ftpd_tmpfs_t, ftpd_tmpfs_t)
manage_lnk_files_pattern(ftpd_t, ftpd_tmpfs_t, ftpd_tmpfs_t)
manage_fifo_files_pattern(ftpd_t, ftpd_tmpfs_t, ftpd_tmpfs_t)
manage_sock_files_pattern(ftpd_t, ftpd_tmpfs_t, ftpd_tmpfs_t)
fs_tmpfs_filetrans(ftpd_t, ftpd_tmpfs_t, { dir file lnk_file sock_file fifo_file })

manage_dirs_pattern(ftpd_t, ftpd_var_run_t, ftpd_var_run_t)
manage_files_pattern(ftpd_t, ftpd_var_run_t, ftpd_var_run_t)
manage_sock_files_pattern(ftpd_t, ftpd_var_run_t, ftpd_var_run_t)
files_pid_filetrans(ftpd_t, ftpd_var_run_t, { file dir} )

# proftpd requires the client side to bind a socket so that
# it can stat the socket to perform access control decisions,
# since getsockopt with SO_PEERCRED is not available on all
# proftpd-supported OSs
allow ftpd_t ftpdctl_tmp_t:sock_file { getattr unlink };

# Create and modify /var/log/xferlog.
allow ftpd_t xferlog_t:dir search_dir_perms;
allow ftpd_t xferlog_t:file manage_file_perms;
logging_log_filetrans(ftpd_t, xferlog_t, file)

kernel_read_kernel_sysctls(ftpd_t)
kernel_read_system_state(ftpd_t)
kernel_search_network_state(ftpd_t)

dev_read_sysfs(ftpd_t)
dev_read_urand(ftpd_t)

corecmd_exec_bin(ftpd_t)

corenet_all_recvfrom_unlabeled(ftpd_t)
corenet_all_recvfrom_netlabel(ftpd_t)
corenet_tcp_sendrecv_all_if(ftpd_t)
corenet_udp_sendrecv_all_if(ftpd_t)
corenet_tcp_sendrecv_all_nodes(ftpd_t)
corenet_udp_sendrecv_all_nodes(ftpd_t)
corenet_tcp_sendrecv_all_ports(ftpd_t)
corenet_udp_sendrecv_all_ports(ftpd_t)
corenet_tcp_bind_all_nodes(ftpd_t)
corenet_tcp_bind_ftp_port(ftpd_t)
corenet_tcp_bind_ftp_data_port(ftpd_t)
corenet_tcp_bind_generic_port(ftpd_t)
corenet_tcp_bind_all_unreserved_ports(ftpd_t)
corenet_dontaudit_tcp_bind_all_ports(ftpd_t)
corenet_tcp_connect_all_ports(ftpd_t)
corenet_sendrecv_ftp_server_packets(ftpd_t)

domain_use_interactive_fds(ftpd_t)

files_search_etc(ftpd_t)
files_read_etc_files(ftpd_t)
files_read_etc_runtime_files(ftpd_t)
files_search_var_lib(ftpd_t)

fs_search_auto_mountpoints(ftpd_t)
fs_getattr_all_fs(ftpd_t)

auth_use_nsswitch(ftpd_t)
auth_domtrans_chk_passwd(ftpd_t)
# Append to /var/log/wtmp.
auth_append_login_records(ftpd_t)
#kerberized ftp requires the following
auth_write_login_records(ftpd_t)
auth_rw_faillog(ftpd_t)

init_rw_utmp(ftpd_t)

libs_use_ld_so(ftpd_t)
libs_use_shared_libs(ftpd_t)

logging_send_audit_msgs(ftpd_t)
logging_send_syslog_msg(ftpd_t)
logging_set_loginuid(ftpd_t)

miscfiles_read_localization(ftpd_t)
miscfiles_read_public_files(ftpd_t)

seutil_dontaudit_search_config(ftpd_t)

sysnet_read_config(ftpd_t)
sysnet_use_ldap(ftpd_t)

userdom_dontaudit_use_unpriv_user_fds(ftpd_t)

sysadm_dontaudit_search_home_dirs(ftpd_t)

tunable_policy(`allow_ftpd_anon_write',`
	miscfiles_manage_public_files(ftpd_t)
')

tunable_policy(`allow_ftpd_use_cifs',`
	fs_read_cifs_files(ftpd_t)
	fs_read_cifs_symlinks(ftpd_t)
')

tunable_policy(`allow_ftpd_use_cifs && allow_ftpd_anon_write',`
	fs_manage_cifs_files(ftpd_t)
')

tunable_policy(`allow_ftpd_use_nfs',`
	fs_read_nfs_files(ftpd_t)
	fs_read_nfs_symlinks(ftpd_t)
')

tunable_policy(`allow_ftpd_use_nfs && allow_ftpd_anon_write',`
	fs_manage_nfs_files(ftpd_t)
')

tunable_policy(`allow_ftpd_full_access',`
	allow ftpd_t self:capability { dac_override dac_read_search };
	auth_manage_all_files_except_shadow(ftpd_t)
')

tunable_policy(`ftp_home_dir',`
	allow ftpd_t self:capability { dac_override dac_read_search };

	# allow access to /home
	files_list_home(ftpd_t)
	userdom_read_all_users_home_content_files(ftpd_t)
	userdom_manage_all_users_home_content_dirs(ftpd_t)
	userdom_manage_all_users_home_content_files(ftpd_t)
	userdom_manage_all_users_home_content_symlinks(ftpd_t)
')

tunable_policy(`ftp_home_dir && use_nfs_home_dirs',`
	fs_manage_nfs_files(ftpd_t)
	fs_read_nfs_symlinks(ftpd_t)
')

tunable_policy(`ftp_home_dir && use_samba_home_dirs',`
	fs_manage_cifs_files(ftpd_t)
	fs_read_cifs_symlinks(ftpd_t)
')

optional_policy(`
	tunable_policy(`ftp_home_dir',`
		apache_search_sys_content(ftpd_t)
	')
')

optional_policy(`
	corecmd_exec_shell(ftpd_t)

	files_read_usr_files(ftpd_t)

       	cron_system_entry(ftpd_t, ftpd_exec_t)

	optional_policy(`
		logrotate_exec(ftpd_t)
	')
')

optional_policy(`
	daemontools_service_domain(ftpd_t, ftpd_exec_t)
')

optional_policy(`
	kerberos_read_keytab(ftpd_t)
')

optional_policy(`
	inetd_tcp_service_domain(ftpd_t, ftpd_exec_t)

	optional_policy(`
		tcpd_domtrans(tcpd_t)
	')
')

optional_policy(`
	seutil_sigchld_newrole(ftpd_t)
')

optional_policy(`
	udev_read_db(ftpd_t)
')

########################################
#
# ftpdctl local policy
#

# Allow ftpdctl to talk to ftpd over a socket connection
stream_connect_pattern(ftpdctl_t, ftpd_var_run_t, ftpd_var_run_t, ftpd_t)

# ftpdctl creates a socket so that the daemon can perform
# access control decisions (see comments in ftpd_t rules above)
allow ftpdctl_t ftpdctl_tmp_t:sock_file { create setattr };
files_tmp_filetrans(ftpdctl_t, ftpdctl_tmp_t, sock_file)

# Allow ftpdctl to read config files
files_read_etc_files(ftpdctl_t)

libs_use_ld_so(ftpdctl_t)
libs_use_shared_libs(ftpdctl_t)