Verify Digital signatures in the document Leave feedback

GroupDocs.Signature provides the DigitalVerifyOptions class to specify different options for verifying Digital signatures.

Here are the steps to verify a Digital signature within the document with GroupDocs.Signature:

• Create a new instance of the Signature class and pass the source document path as a constructor parameter.
• Instantiate the DigitalVerifyOptions object according to your requirements and specify the verification options.
• Call the Verify method of the Signature class instance and pass the DigitalVerifyOptions to it.

This example shows how to verify Digital signature in the document.

  // The path to the documents directory.
  const filePath = Constants.SAMPLE_PDF_SIGNED; 

  // Initialize Signature instance
  const signature = new signatureLib.Signature(filePath);

  // Initialize DigitalVerifyOptions
  const options = new signatureLib.DigitalVerifyOptions(Constants.CertificatePfx);
  options.setComments('Mr.Smith');
  options.setPassword('1234567890');

  // Verify document signatures
  const result = signature.verify(options);

  if (result.isValid()) {
    console.log('\nDocument was verified successfully!');
  } else {
    console.log('\nDocument failed the verification process.');
  }

You may easily run the code above and see the feature in action in our GitHub examples:

• GroupDocs.Signature for .NET examples, plugins, and showcase
• GroupDocs.Signature for Java examples, plugins, and showcase
• Document Signature for .NET MVC UI Example
• Document Signature for .NET App WebForms UI Example
• Document Signature for Java App Dropwizard UI Example
• Document Signature for Java Spring UI Example

Along with the full-featured .NET library, we provide simple but powerful free online apps.

To sign PDF, Word, Excel, PowerPoint, and other documents you can use the online apps from the GroupDocs.Signature App Product Family.