Simple AES enc/dec python

crypt.py

import struct
from Crypto.Cipher import AES

def pad16(s):
    t = struct.pack('>I', len(s)) + s.encode('utf-8')
    return t + b'\x00' * ((16 - len(t) % 16) % 16)

def unpad16(s):
    n = struct.unpack('>I', s[:4])[0]
    return s[4:n + 4]

class Crypt(object):
    def __init__(self, password):
        password = pad16(password)
        self.cipher = AES.new(password, AES.MODE_ECB)
    def encrypt(self, s):
        s = pad16(s)
        return self.cipher.encrypt(s)
    def decrypt(self, s):
        t = self.cipher.decrypt(s)
        return unpad16(t)

def encrypt(s, p):
    c = Crypt(p)
    return c.encrypt(s)

def decrypt(s, p):
    c = Crypt(p)
    return c.decrypt(s)