platform_system_sepolicy/public/drmserver.te

# drmserver - DRM service
type drmserver, domain;
type drmserver_exec, exec_type, file_type;

typeattribute drmserver mlstrustedsubject;

net_domain(drmserver)

# Perform Binder IPC to system server.
binder_use(drmserver)
binder_call(drmserver, system_server)
binder_call(drmserver, { appdomain ephemeral_app })
binder_service(drmserver)
# Inherit or receive open files from system_server.
allow drmserver system_server:fd use;

# Perform Binder IPC to mediaserver
binder_call(drmserver, mediaserver)

allow drmserver sdcard_type:dir search;
allow drmserver drm_data_file:dir create_dir_perms;
allow drmserver drm_data_file:file create_file_perms;
allow drmserver tee_device:chr_file rw_file_perms;
allow drmserver { app_data_file ephemeral_data_file}:file { read write getattr };
allow drmserver sdcard_type:file { read write getattr };
r_dir_file(drmserver, efs_file)

type drmserver_socket, file_type;

# /data/app/tlcd_sock socket file.
# Clearly, /data/app is the most logical place to create a socket.  Not.
allow drmserver apk_data_file:dir rw_dir_perms;
type_transition drmserver apk_data_file:sock_file drmserver_socket;
allow drmserver drmserver_socket:sock_file create_file_perms;
allow drmserver tee:unix_stream_socket connectto;
# Delete old socket file if present.
allow drmserver apk_data_file:sock_file unlink;

# After taking a video, drmserver looks at the video file.
r_dir_file(drmserver, media_rw_data_file)

# Read resources from open apk files passed over Binder.
allow drmserver apk_data_file:file { read getattr };
allow drmserver asec_apk_file:file { read getattr };
allow drmserver ringtone_file:file { read getattr };

# Read /data/data/com.android.providers.telephony files passed over Binder.
allow drmserver radio_data_file:file { read getattr };

# /oem access
allow drmserver oemfs:dir search;
allow drmserver oemfs:file r_file_perms;

allow drmserver drmserver_service:service_manager { add find };
allow drmserver permission_service:service_manager find;

selinux_check_access(drmserver)

r_dir_file(drmserver, cgroup)
r_dir_file(drmserver, system_file)