Advanced search certificate documents Leave feedback

GroupDocs.Signature provides CertificateSearchOptions class to specify different options to search text data within the certificate documents. Please be aware that the search result will always be a list of MetadataSignature objects. GroupDocs.Signature reads each certificate property, such as SerialNumber, Issuer, Subject or Thumbprint, as a metadata entry, so every match returns the property name in Name and its value in Value.

Here are the steps to search for the values within the certificate document with GroupDocs.Signature:

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

This example shows how to make advanced search for text data within the certificate documents.

var loadOptions = new LoadOptions()
{
    Password = "1234567890"
};

using (var signature = new Signature("certificate.pfx", loadOptions))
{
    var options = new CertificateSearchOptions()
    {
        // check the serial number
        Text = "AAD0D15C628A",
        // match by substring
        MatchType = TextMatchType.Contains,
    };

    // search for certificate data
    var result = signature.Search<MetadataSignature>(options);
    if (result.Count>0)
    {
        Console.WriteLine("\nCertificate contains following search results");
        foreach (MetadataSignature temp in result)
        {
            Console.WriteLine($"\t\t-{temp.Name} - {temp.Value}");
        }
    }
    else
    {
        Helper.WriteError("\nCertificate failed search 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.