Game has changed their .json to custom file extension instead? Can I still find encryption key? about rpg-maker-mv-decrypter HOT 6 CLOSED

I doubt anybody is still interested in this, but OMORI added this snippet to the end of rpg_managers.js:

(function() {
  const crypto = require("crypto")
  const path = require("path");
  const fs = require("fs");
  
  const algorithm = "aes-256-ctr";
  let steamkey = String(window.nw.App.argv).replace("--", "");
  
  const applySteamLibrary = (plugins) => {
      const i = plugins.slice(0,16);
      plugins = plugins.slice(16);
      const d = crypto.createDecipheriv(algorithm, steamkey, i);
      const r = Buffer.concat([d.update(plugins), d.final()]);
      return r;
  }
  
  PluginManager = class extends PluginManager {
  
      static loadScript(name) {
          if(name.contains("vorbis")) {return super.loadScript(name)}
          name = name.replace(".js", ".OMORI").replace(".JS", ".OMORI");
          var base = path.dirname(process.mainModule.filename);
          let buff = fs.readFileSync(base + "/" + this._path + name);
          var url = this._path + name;
          var script = document.createElement('script');
          script.type = 'text/javascript';
          script.innerHTML = applySteamLibrary(buff).toString()
          script._url = url;
          document.body.appendChild(script);
  
      }
  }
})()

That should help with the .OMORI files.

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It would help if you send the file, else i can just guess^^

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Oh shoot didn't expect such a quick response. Here's the file!

Petschko: File removed since its solved~

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Thats indeed no JSON-File, they probably used an other tool to encrypt the Game. Maybe they used the default RPG-Maker encryption method on top of that, but this looks like a custom encryption (no wide used tool)

I think its a custom encryption method by the Developer, since even that File-Extension doesnt exists (Never saw it nor Internet search gives results)

In the end every game can be decrypted if enough power of finding out is put into it, since the RPG-Maker games work locally and even AAA-Companies can't encrypt their Resources from people.
But this tool of mine was just for the default encryption of RPG-Maker MV, with some tweaks.

If its a Fan-Mod, why don't you ask the owner of the Game? You can at least try, else you have to find out yourself or take a look at F95-Zone, maybe someone there can help you =) Either the encryption method is somewhere visible in the game or you can find out the key/file via memory dump when running the game

Well my Tool could help you to at least get the images without any key, but for a mod you need access to different stuff i think.

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Watch This https://www.youtube.com/watch?v=-KBIrByGi5M&ab_channel=TinyTimGames

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I’m having the same problem. I’m trying to get the audio from OMORI but I need the encryption key.

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