I don't know what map.cft you're talking about, but I have this python snippet that I used to "decrypt" CFT files a while back.
Code:#!/usr/bin/python3 import sys input_file_name = sys.argv[1] input_file = open(input_file_name, "rb") output_file_name = sys.argv[2] output_file = open(output_file_name, "wb") while True: data = bytearray(input_file.read(4096)) if 0 == len(data): break for i in range(len(data)): data[i] ^= 0x10 output_file.write(data) output_file.close() input_file.close()