from M2Crypto.EVP import Cipher 
from M2Crypto import m2 
from M2Crypto import util 
  
ENCRYPT_OP = 1 # 加密操作 
DECRYPT_OP = 0 # 解密操作 
  
iv = '\0' * 16 # 初始化变量，对于aes_128_ecb算法无用 
PRIVATE_KEY = 'dd7fd4a156d28bade96f816db1d18609' # 密钥 
  
def Encrypt(data): 
 '使用aes_128_ecb算法对数据加密' 
 cipher = Cipher(alg = 'aes_128_ecb', key = PRIVATE_KEY, iv = iv, op = ENCRYPT_OP) 
 buf = cipher.update(data) 
 buf = buf + cipher.final() 
 del cipher 
 # 将明文从字节流转为16进制 
 output = '' 
 for i in buf: 
  output += 'X' % (ord(i)) 
 return output 
  
def Decrypt(data): 
 '使用aes_128_ecb算法对数据解密' 
 # 将密文从16进制转为字节流 
 data = util.h2b(data) 
 cipher = Cipher(alg = 'aes_128_ecb', key = PRIVATE_KEY, iv = iv, op = DECRYPT_OP) 
 buf = cipher.update(data) 
 buf = buf + cipher.final() 
 del cipher 
 return buf