Add sepolicy for drm HALs
bug:32815560
Change-Id: I494141b47fcd2e7e0cc02aa58d8df9a222060b3f
diff --git a/public/hal_drm.te b/public/hal_drm.te
new file mode 100644
index 0000000..79b385f
--- /dev/null
+++ b/public/hal_drm.te
@@ -0,0 +1,53 @@
+## call into system_server process (for invoking callbacks)
+binder_call(hal_drm, mediadrmserver)
+
+# Required by Widevine DRM (b/22990512)
+allow hal_drm self:process execmem;
+
+# Permit reading device's serial number from system properties
+get_prop(hal_drm, serialno_prop)
+
+# System file accesses
+allow hal_drm system_file:dir r_dir_perms;
+allow hal_drm system_file:file r_file_perms;
+allow hal_drm system_file:lnk_file r_file_perms;
+
+# Read files already opened under /data
+allow hal_drm system_data_file:dir { search getattr };
+allow hal_drm system_data_file:file { getattr read };
+allow hal_drm system_data_file:lnk_file r_file_perms;
+
+# Read access to pseudo filesystems
+r_dir_file(hal_drm, cgroup)
+allow hal_drm cgroup:dir { search write };
+allow hal_drm cgroup:file w_file_perms;
+
+# Allow access to ion memory allocation device
+allow hal_drm ion_device:chr_file rw_file_perms;
+allow hal_drm hal_graphics_allocator:fd use;
+
+# Allow access to app_data and media_data_files
+allow hal_drm media_data_file:dir create_dir_perms;
+allow hal_drm media_data_file:file create_file_perms;
+allow hal_drm media_data_file:file { getattr read };
+
+allow hal_drm sysfs:file r_file_perms;
+
+# Connect to tee service.
+allow hal_drm tee:unix_stream_socket connectto;
+allow hal_drm tee_device:chr_file rw_file_perms;
+
+# only allow unprivileged socket ioctl commands
+allowxperm hal_drm self:{ rawip_socket tcp_socket udp_socket }
+ ioctl { unpriv_sock_ioctls unpriv_tty_ioctls };
+
+###
+### neverallow rules
+###
+
+# hal_drm should never execute any executable without a
+# domain transition
+neverallow hal_drm { file_type fs_type }:file execute_no_trans;
+
+# do not allow privileged socket ioctl commands
+neverallowxperm hal_drm domain:{ rawip_socket tcp_socket udp_socket } ioctl priv_sock_ioctls;
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