gistfile1.py

from Crypto.Cipher import AES
import binascii

aes_key = '1234567890123456' # it must be 128-bit.

def aes_encrypt(data):
    cipher = AES.new(aes_key)
    expected_length = 16 * ((len(data) / 16) + 1)
    padding_length = expected_length - len(data)
    data = data + chr(padding_length) * padding_length
    return binascii.hexlify(cipher.encrypt(data))

def aes_decrypt(data):
    cipher = AES.new(aes_key)
    dec = cipher.decrypt(binascii.unhexlify(data))
    if '\x00' in dec:
        dec = dec[:dec.index('\x00')]
    last = dec[len(dec) - 1]
    dec = dec[:-ord(last)]
    return dec