public/hal_wifi_supplicant.te

# HwBinder IPC from client to server
binder_call(hal_wifi_supplicant_client, hal_wifi_supplicant_server)
binder_call(hal_wifi_supplicant_server, hal_wifi_supplicant_client)

# in addition to ioctls whitelisted for all domains, grant hal_wifi_supplicant priv_sock_ioctls.
allowxperm hal_wifi_supplicant self:udp_socket ioctl priv_sock_ioctls;

r_dir_file(hal_wifi_supplicant, sysfs_type)
r_dir_file(hal_wifi_supplicant, proc_net)

allow hal_wifi_supplicant kernel:system module_request;
allow hal_wifi_supplicant self:capability { setuid net_admin setgid net_raw };
allow hal_wifi_supplicant cgroup:dir create_dir_perms;
allow hal_wifi_supplicant self:netlink_route_socket nlmsg_write;
allow hal_wifi_supplicant self:netlink_socket create_socket_perms_no_ioctl;
allow hal_wifi_supplicant self:netlink_generic_socket create_socket_perms_no_ioctl;
allow hal_wifi_supplicant self:packet_socket create_socket_perms;
allowxperm hal_wifi_supplicant self:packet_socket ioctl { unpriv_sock_ioctls priv_sock_ioctls unpriv_tty_ioctls };
allow hal_wifi_supplicant wifi_data_file:dir create_dir_perms;
allow hal_wifi_supplicant wifi_data_file:file create_file_perms;
# TODO(b/35707797): Remove this socket access.
unix_socket_send(hal_wifi_supplicant, system_wpa, system_server)

# HIDL interface exposed by WPA.
hwbinder_use(hal_wifi_supplicant)
binder_call(hal_wifi_supplicant, system_server)

# Create a socket for receiving info from wpa
allow hal_wifi_supplicant wpa_socket:dir create_dir_perms;
allow hal_wifi_supplicant wpa_socket:sock_file create_file_perms;

# TODO(b/34131400): Use hwbinder to access keystore.
use_keystore(hal_wifi_supplicant)
binder_use(hal_wifi_supplicant)

# WPA (wifi) has a restricted set of permissions from the default.
allow hal_wifi_supplicant keystore:keystore_key {
    get
    sign
    verify
};

# Allow wpa_cli to work. wpa_cli creates a socket in
# /data/misc/wifi/sockets which hal_wifi_supplicant supplicant communicates with.
userdebug_or_eng(`
  unix_socket_send(hal_wifi_supplicant, wpa, su)
')

###
### neverallow rules
###

# wpa_supplicant should not trust any data from sdcards
neverallow hal_wifi_supplicant_server sdcard_type:dir ~getattr;
neverallow hal_wifi_supplicant_server sdcard_type:file *;