nwjs-nodejs- encrypt and decrypt img file (jpg) and use the decrypted data to an img element

Question

I developed a desktop application with nwjs (nodejs / html / css ), now i want to put the app for the production so i need to prevent stealing my assets (my images are very valuables), nwjs provide a tool to compile (encrypt) the js files but not the asset so i thought about encrypting my assets with a js then encrypt the js with nwjs tool, i am not very familiare with node modules and dealing with files in js so i struggled with this task ! This code is what i tried to do but i did not reach my goal ?

• encrypt

  let crypto;
  try {
      crypto = require('crypto');
  } catch (err) {
      console.log('crypto support is disabled!');
  }
  var algorithm = 'aes-256-ctr',
          password = 'secret';
  var fs = require('fs');
  var r;
  
  // encrypt content
  var encrypt = crypto.createCipher(algorithm, password);
  // decrypt content
  var decrypt = crypto.createDecipher(algorithm, password);
  
  // write file
  var w;
  var path = require('path');
  var dirPath = './Files/';  //directory path
  var fileType = '.' + 'jpg'; //file extension
  var files = [];
  fs2.readdir(dirPath, function (err, list) {
      if (err) throw err;
      for (var i = 0; i < list.length; i++) {
          if (path.extname(list[i]) === fileType) {
              r = fs.createReadStream('Files/' + list[i]);
              w = fs.createWriteStream('encFiles/' + list[i].replace('.jpg', ''));
              console.log(list[i]); //print the file
              // start pipe
              r.pipe(encrypt).pipe(w);
          }
      }
  });
  

• decrypt

      'use strict';
  var crypt = require('crypto'),
          algorithm = 'aes-256-ctr',
          password = 'secret';
  
  var fs = require('fs');
  var zlib = require('zlib');
  var toArray = require('stream-to-array');
  
  // input file
  var r = fs.createReadStream('./encFiles/an example file'); 
  // decrypt content
  var decrypt = crypt.createDecipher(algorithm, password);
  
  //b64 module so i could put the base64 data to img html element
  const B64 = require('b64');
  
  const encoder = new B64.Encoder();
  
  // start pipe
  var stream = r.pipe(decrypt);
  
  var d = stream.pipe(encoder);
  d.pipe(process.stdout);
  
  var data;
  toArray(stream, function(err, arr) {
      console.log(err,arr);
      data = Buffer.concat(arr);
      console.log(data);
  });
  console.log(data);
  

thank you for giving me comments on the code or other IDEAS

Answer 1

So the solution was so simple, I used the nw-js code protection feature to protected the script in which I decrypt the assets (images in my case) (this script contains the key of decryption), so you could implement the encryption/decryption with any method you want and protect the decryption script which is going to be shipped with you product (in my case the desktop app).