Encrypt & Decrypt using PyCrypto AES 256 From http://stackoverflow.com/a/12525165/119849

AESCipher.py

#!/usr/bin/env python

import base64

from Crypto import Random
from Crypto.Cipher import AES

BS = 16
pad = lambda s: s + (BS - len(s) % BS) * chr(BS - len(s) % BS)
unpad = lambda s : s[0:-ord(s[-1])]


class AESCipher:

    def __init__( self, key ):
        self.key = key

    def encrypt( self, raw ):
        raw = pad(raw)
        iv = Random.new().read( AES.block_size )
        cipher = AES.new( self.key, AES.MODE_CBC, iv )
        return base64.b64encode( iv + cipher.encrypt( raw ) )

    def decrypt( self, enc ):
        enc = base64.b64decode(enc)
        iv = enc[:16]
        cipher = AES.new(self.key, AES.MODE_CBC, iv )
        return unpad(cipher.decrypt( enc[16:] ))


cipher = AESCipher('mysecretpassword')
encrypted = cipher.encrypt('Secret Message A')
decrypted = cipher.decrypt(encrypted)
print encrypted
print decrypted

requirements.txt

pycrypto==2.6.1

i think this is aes 128, we have a standard blocksize of 16 bytes (128bit)

Key size decides if it is aes 256 or 128, block size is 16 in both of em