1 import base64
 2 import traceback
 3 from Crypto.Cipher import AES
 4 from Crypto import Random
 5 from clint.textui import colored
 6 class AESCipher:
 7     def __init__( self, key ):
 8         self.key = key
 9         self.bs = 16
10         self.iv = ‘1234567812345678‘
11 
12     def _pad(self, s):
13         return s + (self.bs - len(s) % self.bs) * chr(self.bs - len(s) % self.bs)
14 
15     def _unpad(self, s):
16         return s[:-ord(s[len(s)-1:])]
17 
18     def encrypt( self, raw ):
19         raw = self._pad(raw)
20         cipher = AES.new( self.key, AES.MODE_CBC, self.iv )
21         return base64.b64encode(  cipher.encrypt( raw ) )
22 
23     def decrypt( self, enc ):
24         enc = base64.b64decode(enc)
25         assert enc!=None
26         cipher = AES.new(self.key, AES.MODE_CBC, self.iv )
27         assert cipher!=None
28         #return self._unpad(cipher.decrypt( enc))
29         return cipher.decrypt(enc)
30 
31 if __name__=="__main__":
32     aes=AESCipher(‘1234567812345678‘)
33 
34     try:
35         plaintext = "1234qwer"
36         encrypt_data = aes.encrypt(plaintext)
37         print colored.green("encrypt: %s"%(encrypt_data))
38         decrypt_data = aes.decrypt(encrypt_data)
39         print colored.green("decrypt: %s"%(decrypt_data))
40     except Exception,e:
41         print e
42         traceback.print_exc()
43         del aes