Merge "Fix imprecise name of a fs-verity helper function"

        return (retval == 1);

    }

    /** Returns hash of a root node for the fs-verity enabled file. */

    public static byte[] getFsverityRootHash(@NonNull String filePath) {

    /**

     * Returns fs-verity digest for the file if enabled, otherwise returns null. The digest is a

     * hash of root hash of fs-verity's Merkle tree with extra metadata.

     *

     * @see <a href="https://www.kernel.org/doc/html/latest/filesystems/fsverity.html#file-digest-computation">

     *      File digest computation in Linux kernel documentation</a>

     * @return Bytes of fs-verity digest

     */

    public static byte[] getFsverityDigest(@NonNull String filePath) {

        byte[] result = new byte[HASH_SIZE_BYTES];

        int retval = measureFsverityNative(filePath, result);

        if (retval < 0) {

        // Skip /product folder.

        // TODO(b/231354111): remove this hack once we are allowed to change SELinux rules.

        if (!containsFile(Environment.getProductDirectory(), filePath)) {

            byte[] verityHash = VerityUtils.getFsverityRootHash(filePath);

            byte[] verityHash = VerityUtils.getFsverityDigest(filePath);

            if (verityHash != null) {

                return new ApkChecksum(split, TYPE_WHOLE_MERKLE_ROOT_4K_SHA256, verityHash);

            }