Python AES 算法 使用iv

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#!/usr/bin/env python
# -*- coding:utf-8 -*-
from Crypto.Cipher import AES
from binascii import b2a_hex, a2b_hex
class prpcrypt():
def __init__(self,key,iv):
self.key = key
self.iv  = iv
self.mode = AES.MODE_CBC
self.BS = AES.block_size
#补位
self.pad = lambda s: s + (self.BS - len(s) % self.BS) * chr(self.BS - len(s) % self.BS)
self.unpad = lambda s : s[0:-ord(s[-1])]
def encrypt(self,text):
text = self.pad(text)
cryptor = AES.new(self.key,self.mode,self.iv)
#目前AES-128 足够目前使用
ciphertext = cryptor.encrypt(text)
#把加密后的字符串转化为16进制字符串
return b2a_hex(ciphertext)
#解密后，去掉补足的空格用strip() 去掉
def decrypt(self,text):
cryptor = AES.new(self.key,self.mode, iv)
plain_text  = cryptor.decrypt(a2b_hex(text))
return self.unpad(plain_text.rstrip('\0'))

if __name__ == '__main__':
iv = "1237635217384736"
pc = prpcrypt('Jsdfiahdjfieqodk', iv) #初始化密钥 和 iv
import sys
e = pc.encrypt(sys.argv[1]) #加密
d = pc.decrypt(e) #解密
print "加密:",e
print "解密:",d
print "长度:",len(d)