"""
Encrypting and decrypting a message

https://www.geeksforgeeks.org/how-to-encrypt-and-decrypt-strings-in-python/

@author Todorov-Lachezar
"""

import rsa

class encrypt_decrypt():

    # the message we want to encrypt
    message = "Hello World"

    def make_keys(key_length):
        publicKey, privateKey = ""
        # Generates public and private keys
        # Method takes in key length as a parameter
        # Note: the key length should be >16
        if(key_length < 16):
            publicKey, privateKey = rsa.newkeys(key_length)
            return publicKey, privateKey
        else:
            return "Enter a key_length of >16"


    def encryption(plaintext, publicKey):
        # Encrypts the message with the public key
        # Note: make sure to encode the message before encrypting
        encMessage = rsa.encrypt(plaintext.encode(), publicKey)
        return encMessage
    
    def decryption(ciphertext, privateKey):
        # Decrypts the encrypted message with the private key 
        # Note: make sure to decode the message after decryption
        decMessage = rsa.decrypt(ciphertext, privateKey).decode()
        return decMessage