Lock PDF via JavaScript via C++

Encrypt PDF files. Use Aspose.PDF for JavaScript via C++ to modify PDF documents programmatically

Aspose.PDF for JavaScript via C++ Logo
C# Java C++ Python

Protect PDF Document Using JavaScript via C++

Lock PDF using Aspose.PDF for JavaScript via C++. Locking PDF with passwords or encryption is essential for keeping sensitive content confidential and stopping unauthorized access to data. When you lock PDF with password, it gains control over who can access its content, allowing you to set permissions for reading, editing, or printing. Lock PDF prevents unauthorized changes to the document, maintaining its accuracy and reliability. This is especially important for protecting personal or confidential info and ensuring the safety of user identities and their privacy. Lock PDF with password files helps protect your personal info. Often some industries have strict rules about safeguarding confidential information. Locking PDF can fulfill these requirements and provide the necessary protection. It’s crucial to use encryption responsibly, following the law and ethical guidelines. Always make sure you have the right permissions to secure documents properly. Locking a PDF is vital for safeguarding the privacy and security of the data it holds, especially when keeping information safe is a top priority. PDF file encryption helps to ensure data privacy, especially if the file contains private information. Password encryption helps prevent unauthorized access to file content. Encryption allows you to restrict access to the PDF file only to certain users. You can set a password to open a file or configure permissions to control what users can do with your PDF document. In order to encrypt PDF file, we’ll use Aspose.PDF for JavaScript via C++ is a easy and secure toolkit used to work with PDF directly in the web browser. To install and use Aspose.PDF for JavaScript via C++ extract files from the ZIP archive.

How to Protect PDF - JavaScript via C++

You need Aspose.PDF for JavaScript via C++ to try the code in your environment.

  1. Open a PDF document using Document object.
  2. Create a password for user and owner.
  3. Call Document.Encrypt Method.
  4. Save the PDF file.

The provided JavaScript via C++ code snippet shows how to lock PDF documents using the Aspose.PDF library. It opens a PDF document named ‘Encrypt.pdf’. It encrypts the opened PDF using encryption settings. The user password and owner password are provided for accessing and managing permissions, and it uses the RC4x128 encryption algorithm. The ‘0’ signifies that no specific permissions are granted for users to modify the document. After encrypting the PDF, the code saves the updated document to a file named ‘Encrypt_out.pdf’ in the same directory specified by the ‘dataDir’ variable. This code snippet is a simplified example of how you might use a Aspose.PDF library or framework to lock PDF file and save the locked version.

Lock PDF Document - JavaScript via C++

This sample code shows how to encrypt PDF file - JavaScript via C++

Input file:

File not added

Password:

Output format:

Output file:


    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]);
  }