# This Python file uses the following encoding: utf-8
from Crypto.Cipher import AES
from base64 import b64encode, b64decode
import platform
from Crypto.Hash import SHA256


class Vermasseln:
    def oscarVermasseln(self, data):
        b_data = data.encode("utf-8")
        cipher = self.__vermasslungsKobold()

        ciphertext, tag = cipher.encrypt_and_digest(b_data)
        decoded_data = [b64encode(x).decode("utf-8") for x in (ciphertext, tag)]
        storable_data = ".".join(decoded_data)

        return storable_data

    def entschluesseln(self, data):
        try:
            data_list = data.split(".")
            encoded_data = [b64decode(x) for x in data_list]
            cipher = self.__vermasslungsKobold()
            decrypted_data = cipher.decrypt_and_verify(encoded_data[0], encoded_data[1])
            decrypted_data = decrypted_data.decode("utf-8")
        except (ValueError, IndexError):
            print("Configuration corrupted")
            decrypted_data = None

        except Exception as e:
            print(str(e))
            decrypted_data = None

        return decrypted_data

    def __vermasslungsKobold(self):
        key = platform.processor().encode("utf-8")
        key = key[0:31]
        hash_key = SHA256.new(key)
        hashed = hash_key.digest()
        nonce = platform.machine().encode("utf-8")
        cipher = AES.new(hashed, AES.MODE_SIV, nonce = nonce)
        return cipher