android10/system/sepolicy/private/fsverity_init.te

type fsverity_init, domain, coredomain;
type fsverity_init_exec, exec_type, file_type, system_file_type;

init_daemon_domain(fsverity_init)

# Allow this shell script to run and execute toybox
allow fsverity_init shell_exec:file rx_file_perms;
allow fsverity_init toolbox_exec:file rx_file_perms;

# Allow to read /proc/keys for searching key id.
allow fsverity_init proc_keys:file r_file_perms;

# Kernel only prints the keys that can be accessed and only kernel keyring is needed here.
dontaudit fsverity_init init:key view;
dontaudit fsverity_init vold:key view;
allow fsverity_init kernel:key { view search write setattr };
allow fsverity_init fsverity_init:key { view search write };

# Allow init to write to /proc/sys/fs/verity/require_signatures
allow fsverity_init proc_fs_verity:file w_file_perms;

# When kernel requests an algorithm, the crypto API first looks for an
# already registered algorithm with that name. If it fails, the kernel creates
# an implementation of the algorithm from templates.
dontaudit fsverity_init kernel:system module_request;