Add Digital Signature to PDF via JavaScript via C++

Digital signature generation and verification using server-side Aspose.PDF for JavaScript via C++ APIs. Native and high performance library

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How to add Digitally Sign to PDF File Using JavaScript via C++ Library

By digitally signing a PDF, you ensure the integrity of the document, and the security of transmission. The signature acts as a unique identifier that verifies the authenticity of the content and confirms that it has not been tampered with. In order to sign 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.

Add Digitally Sign to PDF via JavaScript via C++

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

  1. Load the PDF with an instance of Document.
  2. Load all the PDF files with full path.
  3. Set the style of text like font, font size, color etc.
  4. Save PDF file, You will get the document with signature inserted.
  5. To verify the validity of the signature use PdfFileSignature.VerifySigned() method.

Add Electronic Signature to a PDF File using - JavaScript via C++

This sample code shows how to Signature PDF Pages - JavaScript via C++

Input file:

File not added

Certificate file:

File not added

Output format:

Output file:


    var ffileSignPKCS7 = function (e) {
        const file_reader = new FileReader();
        file_reader.onload = (event) => {
        let pswSign = document.getElementById("passwordSign").value;
        /*sign a PDF-file and save the "ResultSignPKCS7.pdf"*/
        const json = AsposePdfSignPKCS7(event.target.result, e.target.files[0].name, 1, fileSign, pswSign, 200, 200, 200, 100, "TEST", "test@test.com", "EU", 1, signatureAppearance,"ResultSignPKCS7.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]);
    };