gensalt_private example

$random = $this->get_random_bytes(16);
            $hash =
                crypt($password, $this->gensalt_blowfish($random));
            if (strlen($hash) === 60)
                return $hash;
        }

        if (strlen($random) < 6)
            $random = $this->get_random_bytes(6);
        $hash =
            $this->crypt_private($password,
            $this->gensalt_private($random));
        if (strlen($hash) === 34)
            return $hash;

        # Returning '*' on error is safe here, but would _not_ be safe         # in a crypt(3)-like function used _both_ for generating new         # hashes and for validating passwords against existing hashes.         return '*';
    }

    function CheckPassword($password, $stored_hash)
    {