How to Verify Digital Signatures in CDR

GroupDocs.Signature makes it easy for .NET developers to verify digital signatures in CDR files from within their applications by implementing a few easy steps.

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

System Requirements

GroupDocs.Signature for .NET APIs are supported on all major platforms and operating systems. Before executing the code below, please make sure that you have the following prerequisites installed on your system.

Operating Systems: Microsoft Windows, Linux, MacOS
Development Environments: Visual Studio, Xamarin, MonoDevelop
Frameworks: .NET Framework, .NET Standard, .NET Core, Mono
Download the latest version of GroupDocs.Signature for .NET from NuGet

using (Signature signature = new Signature("sample.pdf"))
{
    DigitalVerifyOptions options = new DigitalVerifyOptions("certificate.pfx")
    {
        Comments = "Test comment"
    };
    // verify document signatures
    VerificationResult result = signature.Verify(options);
    if (result.IsValid)
    {
        Console.WriteLine("\nDocument was verified successfully!");
    }
    else
    {
        Console.WriteLine("\nDocument failed verification process.");
    }
}

Other Available Options

Multi format digital-signatures validation API for documents and images. Verify signatures from some of the popular file formats as stated below.

Verify Digital Signatures in a CDR File

C# .NET API to verify digital signatures in an already signed CDR file using popular electronic signature types. Manipulate e-signature properties within your documents by adding a few lined of code.

About GroupDocs.Signature for .NET API

How to Verify Digital Signatures in CDR

System Requirements

Verify CDR Signature Live Demos

What is CDR File Format

Other Available Options