better organization

src/utils/aes_encrypt.py

@@ -0,0 +1,57 @@
+#!/usr/bin/env python3
+
+"""
+AES Encryption methods
+"""
+
+__author__ = '@tormakris'
+__copyright__ = "Copyright 2020, onSpot Team"
+__module_name__ = "aes_encrypt"
+__version__text__ = "1"
+
+import base64
+import pickle
+
+from Crypto.Cipher import AES
+
+from flaskaddons.fred import flaskred
+
+
+class AESCrypto:
+    def __init__(self, encoded_secret_key: str, padding_character: bytes = '{'.encode('ascii')):
+        self.padding_character = padding_character
+        self.encoded_secret_key = encoded_secret_key
+
+    def encrypt_message(self, private_msg: str) -> tuple:
+        secret_key = base64.b64decode(self.encoded_secret_key)
+        cipher = AES.new(secret_key, AES.MODE_EAX)
+        ciphertext, tag = cipher.encrypt_and_digest(private_msg.encode('UTF-8'))
+        return cipher.nonce, ciphertext, tag
+
+    def decrypt_message(self, nonce: bytes, encoded_encrypted_msg: bytes, tag: bytes) -> str:
+        secret_key = base64.b64decode(self.encoded_secret_key)
+        cipher = AES.new(secret_key, AES.MODE_EAX, nonce)
+        msg = cipher.decrypt_and_verify(encoded_encrypted_msg, tag).decode('UTF-8')
+        return msg
+
+
+class EncryptedUserRedis:
+
+    def __init__(self, encoded_secret_key: str):
+        self.aes = AESCrypto(encoded_secret_key)
+
+    def store(self, user: dict) -> None:
+        nonce, ciphertext, tag = self.aes.encrypt_message(user['password'])
+        user['nonce'] = nonce
+        user['ciphertext'] = ciphertext
+        user['tag'] = tag
+        user.pop('password', None)
+        flaskred.set(user['name'], pickle.dumps(user))
+
+    def load(self, username: str) -> dict:
+        encrypteddict = pickle.loads(flaskred.get(username))
+
+        plaindict = {"name": encrypteddict['name'],
+                     "password": self.aes.decrypt_message(encrypteddict['nonce'], encrypteddict['ciphertext'],
+                                                          encrypteddict['tag'])}
+        return plaindict