gdMac2Win.py

#!/usr/bin/env python3
#
# Simple script to convert macOS saves of Geometry Dash to Windows
#
import sys
import base64
import gzip
from Crypto.Cipher import AES

KEY = (
    b"\x69\x70\x75\x39\x54\x55\x76\x35\x34\x79\x76\x5d\x69\x73\x46\x4d"
    b"\x68\x35\x40\x3b\x74\x2e\x35\x77\x33\x34\x45\x32\x52\x79\x40\x7b"
)

def xor(string: str, key: int) -> str:
    return ("").join(chr(ord(char) ^ key) for char in string)

def encrypt_data(data: str) -> str:
    gzipped = gzip.compress(data.encode())
    base64_encoded = base64.urlsafe_b64encode(gzipped)
    return xor(base64_encoded.decode(), key=11)

def remove_pad(data: bytes) -> bytes:
    last = data[-1]
    if last < 16:
        data = data[:-last]
    return data

def mac_decrypt(data: bytes) -> str:
    cipher = AES.new(KEY, AES.MODE_ECB)
    return remove_pad(cipher.decrypt(data)).decode()

def main():
    if len(sys.argv) >= 3:
        f = open(sys.argv[1], "rb")
        macSave = f.read()
        f.close()

        macSaveDecrypt = mac_decrypt(macSave)
        windowsSave = encrypt_data(macSaveDecrypt)

        f = open(sys.argv[2], "w")
        f.write(windowsSave)
        f.close()
    else:
        print("Usage: ./gdMac2Win.py <inputFile> <outputFile>")

if __name__ == "__main__":
    main()