Script to encrypt/decrypt sounds for mist world

script.dart

import 'dart:io';
import 'dart:convert';

List<int> applyXOR(List<int> data, int soundId) {
  List<int> XOR_KEY = [8, 5, 13, 5, 97, 4, 63, 27];

  XOR_KEY[0] ^= (soundId & 0xFF);
  XOR_KEY[6] ^= ((soundId >> 8) & 0xFF);

  for (int i = 0; i < data.length; i += 32) {
    data[i] = data[i] ^ XOR_KEY[(i >> 5) & 7];
  }

  return data;
}

Future<void> main(List<String> args) async {
  if (args.isEmpty) {
    print('Usage: ${Platform.resolvedExecutable} file1 [file2 ...]');
    return;
  }

  for (var fileName in args) {
    String outFileExt = filename.endsWith(".ab") ? ".ogg" : ".ab";
    if (fileName.endsWith('.ab') || filename.endsWith(".ogg")) {
      String soundIdStr = fileName.split('.').first;
      int soundId = int.tryParse(soundIdStr) ?? 0;
      List<int> fileData = await File(fileName).readAsBytes();
      List<int> decryptedData = applyXOR(fileData, soundId);
      String outputPath = fileName.replaceFirst(
          filename.endsWith(".ab") ? '.ab' : ".ogg", outFileExt);
      await File(outputPath).writeAsBytes(decryptedData);
      print('Operation done for $fileName and saved to $outputPath');
    } else {
      print('Skipping $fileName: Invalid file format');
    }
  }
}

Thanks! I'm semi-familiar with command line use, but I guess I was just doing something wrong. I'll try again a little later.
Is there any way to use this script to batch convert? What I would like to do is replace all of the English voice lines with the original Chinese ones, but I would rather not have to do every single sound one at a time, then search through them to find only the voicelines and repackage them.

@blindninja97 Sadly, not on windows; not unless you modify the code. However, I did that for you. The following is a link to an archive containing all the sounds in their decrypted form, with their ID's intact. I think it is just what you want.

https://www.dropbox.com/scl/fi/4wn3p6er6liqu37cz6k5i/oggs.7z?rlkey=t686ubepb3xj1bbrj7q2bnj8d&dl=1

Sorry for the late reply, and I hope that helps

Hello, Thanks for this! This'll be pretty useful too. It is not quite what I am looking for, though. What I would like to do is decrypt the voice files from specifically the Chinese version of the game, assuming the key is the same. I haven't tested just yet. Can this script be used to batch decrypt? Because while this archive would give me all of the IDs for the voicelines, I would still have to run the Chinese audio files through one by one if I can't just target the entire folder. Thanks for answering all the questions. Your help is much appreciated.

…

On Tue, Dec 5, 2023 at 2:53 PM the-byte-bender ***@***.***> wrote: @the-byte-bender commented on this gist. ________________________________ @blindninja97 Sadly, not on windows; not unless you modify the code. However, I did that for you. The following is a link to an archive containing all the sounds in their decrypted form, with their ID's intact. I think it is just what you want. https://www.dropbox.com/scl/fi/4wn3p6er6liqu37cz6k5i/oggs.7z?rlkey=t686ubepb3xj1bbrj7q2bnj8d&dl=1 Sorry for the late reply, and I hope that helps — Reply to this email directly, view it on GitHub or unsubscribe. You are receiving this email because you were mentioned. Triage notifications on the go with GitHub Mobile for iOS or Android.