# -*- coding: cp936 -*-#A Test to Return a AES-File of a Common Filefrom Crypto.Cipher import AESfrom Crypto import Randomimport binasciidef AES_File(fs):    key = b'1234567890!@#$%^' #16-bytes password    iv = Random.new().read(AES.block_size)    cipher = AES.new(key, AES.MODE_CBC, iv)    print 'if fs is a multiple of 16...'    #if fs is a multiple of 16    x = len(fs) % 16    print 'fs的长度是： ', len(fs)    print 'The num to padded is : ', x    if x != 0:        fs_pad = fs + '0'*(16 - x) #It shoud be 16-x not         print 'fs_pad is : ', fs_pad        print len(fs_pad)        print len(fs_pad)%16    msg = iv + cipher.encrypt(fs_pad)    print 'File after AES is like...', binascii.b2a_hex(msg[:10])    return msg#Create a Test Src File and Get FileSteamfs = open('test', 'w+')fs.write('啊，我爱你，我的祖国！')fs.write('凌晨三时开始进攻！')fs.seek(0,0)fs_msg = fs.read()print fs_msgfs.close()#Crypt Src FileStreamfc = open('fc', 'wb')fc_msg = AES_File(fs_msg)fc.writelines(fc_msg)fc.close()raw_input('Enter for Exit...')