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- import hashlib
- import base64
- from Crypto.Cipher import AES
- class AESCipher(object):
- def __init__(self, key):
- self.bs = AES.block_size
- self.key=hashlib.sha256(AESCipher.str_to_bytes(key)).digest()
- @staticmethod
- def str_to_bytes(data):
- u_type = type(b"".decode('utf8'))
- if isinstance(data, u_type):
- return data.encode('utf8')
- return data
- @staticmethod
- def _unpad(s):
- return s[:-ord(s[len(s) - 1:])]
- def decrypt(self, enc):
- iv = enc[:AES.block_size]
- cipher = AES.new(self.key, AES.MODE_CBC, iv)
- return self._unpad(cipher.decrypt(enc[AES.block_size:]))
- def decrypt_string(self, enc):
- enc = base64.b64decode(enc)
- return self.decrypt(enc).decode('utf8')
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