auth_chain.py 文件源码

def rnd_data_len(self, buf_size, last_hash, random):
        other_data_size = buf_size + self.server_info.overhead
        # if other_data_size > the bigest item in data_size_list0, not padding any data
        if other_data_size >= self.data_size_list0[-1]:
            return 0

        random.init_from_bin_len(last_hash, buf_size)
        pos = bisect.bisect_left(self.data_size_list0, other_data_size)
        # random select a size in the leftover data_size_list0
        final_pos = pos + random.next() % (len(self.data_size_list0) - pos)
        return self.data_size_list0[final_pos] - other_data_size