Created
January 26, 2023 06:46
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AESCipher with Cryptodome
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| ## Install these packages | |
| ## pycryptodome==3.16.0 | |
| ## pycryptodomex==3.16.0 | |
| import base64 | |
| import hashlib | |
| from Cryptodome import Random | |
| from Cryptodome.Cipher import AES | |
| class AESCipher: | |
| bs = AES.block_size | |
| def __init__(self, key): | |
| self.key = hashlib.sha256(key.encode()).digest() | |
| def encrypt(self, message): | |
| message = self._pad(message) | |
| iv = Random.new().read(AES.block_size) | |
| cipher = AES.new(self.key, AES.MODE_CBC, iv) | |
| return base64.b64encode(iv + cipher.encrypt(message.encode('utf-8'))).decode('utf-8') | |
| 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:])] |
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