DALGLI0/main.py

def encode(m):
    message = format(int.from_bytes(m.encode("latin-1"), "big"), "b")
    generator = "10001000000100001"
    gen_deg = len(generator)

    message += "0" * (gen_deg - 1)
    while len(message) % 8 != 0:
        message = "0" + message

    swapped = list(message)
    for i in range(gen_deg - 1):
        if swapped[i] == "0":
            swapped[i] = "1"
        else:
            swapped[i] = "0"

    message = "".join(swapped)

    while True:

        if message[0] == "0":
            message = message[1:]
        else:
            chunk = message[:gen_deg]

            if len(chunk) < gen_deg:

                while len(chunk) % 8 != 0:
                    chunk = "0" + chunk

                return m + chr(int(chunk[:8], 2)) + chr(int(chunk[8:], 2))

            remainder = format(int(chunk, 2) ^ int(generator, 2), "b")
            message = remainder + message[gen_deg:]


def decode(n):
    message = format(int.from_bytes(n.encode("latin-1"), "big"), "b")
    generator = "10001000000100001"
    gen_deg = len(generator)

    while len(message) % 8 != 0:
        message = "0" + message

    swapped = list(message)
    for i in range(gen_deg - 1):
        if swapped[i] == "0":
            swapped[i] = "1"
        else:
            swapped[i] = "0"

    message = "".join(swapped)

    while True:

        if '1' not in message:
            return True

        if message[0] == "0":
            message = message[1:]
        else:
            chunk = message[:gen_deg]

            if len(chunk) < gen_deg:
                return False

            remainder = format(int(chunk, 2) ^ int(generator, 2), "b")
            message = remainder + message[gen_deg:]


if __name__ == "__main__":
    print()