เข้ารหัส PDF ผ่าน JavaScript via C++

    var ffileEncrypt = function (e) {
        const file_reader = new FileReader();
        file_reader.onload = (event) => {
            /*encrypt a PDF-file with passwords "user" and "owner", and save the "ResultDecrypt.pdf"*/
        const json = AsposePdfEncrypt(event.target.result, e.target.files[0].name, "user", "owner", 
        Module.Permissions.PrintDocument, Module.CryptoAlgorithm.RC4x40, "ResultEncrypt.pdf");
        if (json.errorCode == 0) document.getElementById('output').textContent = json.fileNameResult;
        else document.getElementById('output').textContent = json.errorText;
        /*make a link to download the result file*/
        DownloadFile(json.fileNameResult, "application/pdf");
    };
    file_reader.readAsArrayBuffer(e.target.files[0]);
  }