Message Encoder and Decoder

XOR-Decoder.py

# Encrypted Message Decoder
# Arda Mavi

def decode(encrypted_binary_message, key):
    
    # Key to binary:
    binary_key = " ".join('{0:08b}'.format(ord(one_char), 'b') for one_char in key) + " "


    # Decode encrypted message with using key and XOR gate:
    
    # Get repeated binary key: 
    repeated_binary_key = (binary_key * (int(len(encrypted_binary_message)/len(binary_key))+1))[:len(encrypted_binary_message)]
    
    decoded_binary_mes = ""
    for i, one_bit in enumerate(encrypted_binary_message):
        if one_bit != repeated_binary_key[i]:
            decoded_binary_mes += "1"
        elif one_bit == " ":
            decoded_binary_mes += " "
        else:
            decoded_binary_mes += "0"

    
    # Decoded binary message to message:
    decoded_mes = "".join(chr(int(one_char, 2)) for one_char in decoded_binary_mes.split(" "))


    return decoded_mes


def main():
    encrypted_mes = "" # Binary Message
    key = "" # Text
    print("\n\nDecoded Message:\n", decode(encrypted_mes, key), "\n\n")


if __name__ == "__main__":
    main()

XOR-Encoder.py

# Message Encoder
# Arda Mavi

def encoder(message, key):

    # Get binary message:
    b_message = " ".join('{0:08b}'.format(ord(one_char), 'b') for one_char in message)

    # Get binary key:
    b_key = " ".join('{0:08b}'.format(ord(one_char), 'b') for one_char in key) + " "

    # Get repeated binary key: 
    b_rep_key = (b_key * (int(len(b_message)/len(b_key))+1))[:len(b_message)]
    
    # Split chars:
    m_split = b_message.split(" ")
    k_split = b_rep_key.split(" ")
    
    # XOR Gate:
    em = ""
    for i, j in enumerate(m_split):
        for k, l in enumerate(j):
            if l != k_split[i][k]:
                em += "1"
            else:
                em += "0"
        em += " "
    
    return em


def main():
    message = "" # Text
    key = "" # Text
    print("\nMessage:\n", message, "\n\nKey:\n", key, "\n\nEncrypted Binary Message:\n", encoder(message, key), "\n")

if __name__ == "__main__":
    main()