This quick tutorial explains how to verify digital signature in PDF using Java. It contains complete configuration details, a list of steps and a runnable sample code to validate signature in PDF using Java. You will also learn different options to work with signatures in a PDF file.

Steps to Verify Signature in PDF using Java

1. Configure your project to add Aspose.PDF for Java to verify the signatures in a PDF
2. Instantiate the PdfFileSignature class object for working with PDF signatures
3. Bind the target PDF file using the bindPdf() method
4. Call the verifySignature() method to verify a particular signature in the target PDF file

These steps summarize the process of signature validation on PDF using Java. All the resources are shared like the necessary library that is to be loaded for this operation, important classes and methods that are used from the library to verify a signature in the PDF. You need to know the name of the signature that is to be verified in a PDF as there can be multiple signatures in a single PDF file.

Code to Verify Digital Signature in PDF using Java

The aforementioned sample code demonstrates the PDF file signature validation using Java. The PdfFileSignature class is used for this purpose that contains rich features to work with signatures within a PDF file. It provides features like you can verify if a PDF file is signed or not using the verifySigned() method, adding a signature using the sign() method, remove a signature using the removeSignature() method to name a very few.

This tutorial has guided us to write the digital signature validation process using Java. If you want to learn the process of adding a digital signature to a PDF file, refer to the article on how to add digital signature to PDF in Java.