AES256 with PKCS5 padding

AesCrypt_python3.py

#!/usr/bin/env python3

# -*- coding: utf-8 -*-

from Crypto.Cipher import AES
import base64
import re


class AesCbc:

    def __init__(self, key=None):
        self.key = key
        self.mode = AES.MODE_CBC
        self.size = AES.block_size
        self.pad = lambda s: s + (self.size - len(s) % self.size) * chr(self.size - len(s) % self.size)

    def encrypt(self, content):
        cryptor = AES.new(self.key.encode("utf8"), self.mode, bytearray(16))
        encrypted = cryptor.encrypt(self.pad(content))
        return base64.urlsafe_b64encode(encrypted)

    def decrypt(self, content):
        cryptor = AES.new(self.key.encode("utf8"), self.mode, bytearray(16))
        content += (len(content) % 4) * '='
        content = base64.urlsafe_b64decode(content)
        decrypted = cryptor.decrypt(content)
        try:
            return re.compile('[\\x00-\\x08\\x0b-\\x0c\\x0e-\\x1f\n\r\t]').sub('', decrypted.decode())
        except Exception:
            raise ValueError("inputted value can not be decrypted.")


if __name__ == '__main__':
    aes = AesCbc(key="aaaaaaaaaaaaaaaaaaaaaaaaaaa")
    dec = aes.decrypt("0M9V6FvjopSNbUQcV3uv68DhB5/ZubczlbsNqn9bM98=")
    print(dec)