text: import base64
  import hashlib
  from Crypto import Random
  from Crypto.Cipher import AES
  
  
  class AESCipher:
  
      def __init__(self, key):
          self.bs = AES.block_size
          self.key = hashlib.sha256(key.encode()).digest()
  
      def encrypt(self, raw):
          raw = self._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.encode()))
  
      def decrypt(self, enc):
          enc = base64.b64decode(enc)
          iv = enc[:AES.block_size]
          cipher = AES.new(self.key, AES.MODE_CBC, iv)
          return self._unpad(cipher.decrypt(enc[AES.block_size:])).decode('utf-8')
  
      def _pad(self, s):
          return s + (self.bs - len(s) % self.bs) * chr(self.bs - len(s) % self.bs)
  
      @staticmethod
      def _unpad(s):
          return s[:-ord(s[len(s)-1:])]
  