app.te

#
# Domains for apps that do not run with one of the predefined
# platform UIDs (system, radio, nfc, ...).
#

#
# Trusted apps.
#
type trusted_app, domain;
app_domain(trusted_app)
# Access the network.
net_domain(trusted_app)
# Access bluetooth.
bluetooth_domain(trusted_app)
# Read logs.
allow trusted_app log_device:chr_file read;
# Access /dev/mtp_usb.
# XXX Split android.process.media into a separate domain?
allow trusted_app mtp_device:chr_file rw_file_perms;
# Write to /cache.
allow trusted_app cache_file:dir rw_dir_perms;
allow trusted_app cache_file:file create_file_perms;
# Read from /data/local.
allow trusted_app shell_data_file:dir search;
allow trusted_app shell_data_file:file { open getattr read };
allow trusted_app shell_data_file:lnk_file read;
# Access the sdcard.
allow trusted_app sdcard:dir create_dir_perms;
allow trusted_app sdcard:file create_file_perms;
# Populate /data/app/vmdl*.tmp file created by system server.
# It would be better if this was labeled differently.
allow trusted_app apk_data_file:file write;

#
# An example of a specific domain for a specific app
# A domain for com.android.browser.
type browser_app, domain;
app_domain(browser_app)
# Access the network.
net_domain(browser_app)

#
# Untrusted apps.
#
type untrusted_app, domain;
app_domain(untrusted_app)
# Boolean-controlled options for untrusted apps.
# Network access.
bool app_network true;
if (app_network) {
# Cannot use net_domain within a conditional - type attribute.
allow untrusted_app self:{ tcp_socket udp_socket } *;
allow untrusted_app port_type:tcp_socket name_connect;
allow untrusted_app node_type:{ tcp_socket udp_socket } node_bind;
allow untrusted_app port_type:udp_socket name_bind;
allow untrusted_app port_type:tcp_socket name_bind;
unix_socket_connect(untrusted_app, dnsproxyd, netd)
}
# Bluetooth access.
bool app_bluetooth false;
if (app_bluetooth) {
# No specific SELinux class for bluetooth sockets presently.
allow untrusted_app self:socket *;
}
# SDCard rw access.
bool app_sdcard_rw true;
if (app_sdcard_rw) {
allow untrusted_app sdcard:dir create_dir_perms;
allow untrusted_app sdcard:file create_file_perms;
}
# Native app support.
bool app_ndk false;
if (app_ndk) {
allow untrusted_app app_data_file:file execute;
}

#
# Rules for all app domains.
#

# Receive and use open file descriptors inherited from zygote.
allow appdomain zygote:fd use;

# Read system properties managed by zygote.
allow appdomain zygote_tmpfs:file read;

# Notify zygote of death;
allow appdomain zygote:process sigchld;

# Communicate over a FIFO to system processes.
allow appdomain system:fifo_file rw_file_perms;

# App sandbox file accesses.
allow appdomain app_data_file:dir create_dir_perms;
allow appdomain app_data_file:notdevfile_class_set create_file_perms;

# lib subdirectory of /data/data dir is system-owned.
allow appdomain system_data_file:dir r_dir_perms;

# Use the Binder.
binder_use(appdomain)
# Perform binder IPC to binder services.
binder_call(appdomain, binderservicedomain)
binder_transfer(appdomain, binderservicedomain)
# Perform binder IPC to other apps.
binder_call(appdomain, appdomain)
binder_transfer(appdomain, appdomain)