import random


def messageGeneration():
    messageArray = []

    for i in range(6):

        messageArray.append(random.randint(48, 122))

    print('Generated message as array', messageArray)

    messageAsString = ''

    for i in messageArray:

        messageAsString += chr(i)

    print('Generated message as String: ' + messageAsString)

    return messageArray


def keyGeneration():

    sharedKey = random.getrandbits(24)
    return sharedKey


def encryption(sharedKey, messageArray):

    concatKey = ''
    #String concatinates the key
    for i in range(int(len(messageArray)/2)):

        concatKey += str(sharedKey)

    cryptoMessage = []
    #Bitwise XOR between the individual characters in the message and the concat key
    for i in messageArray:

        cryptoMessage.append(i ^ int(concatKey))

    return cryptoMessage


def decryption(sharedKey, cryptoMessage):

    concatKey = ''
    #String concatinates the key
    for i in range(int(len(cryptoMessage)/2)):

        concatKey += str(sharedKey)

    message = []
    #Bitwise XOR between the individual characters in the message and the concat key
    for i in cryptoMessage:

        message.append(i ^ int(concatKey))

    return message


key = keyGeneration()

cryptoMessage = encryption(key, messageGeneration())

postCryptoMessage = decryption(key, cryptoMessage)

print('Key: ', key)
print()
print('Crypto Message: ', cryptoMessage)
print()
print('Post crypto Message: ', postCryptoMessage)

message = ''

for i in postCryptoMessage:

    message += chr(i)

print('Post crypto message as String: ' + message)