/// <summary>
/// Main method for running the sample.
/// </summary>
public static SampleOutputInfo[] Run(Stream formStream, X509Certificate2 certificate)
{
PDFFixedDocument document = new PDFFixedDocument(formStream);
document.PDFVersion = PDFVersion.Version16;
PDFSignatureField signField = document.Form.Fields["signhere"] as PDFSignatureField;
PDFCmsDigitalSignature signature = new PDFCmsDigitalSignature();
signature.SignatureDigestAlgorithm = PDFDigitalSignatureDigestAlgorithm.Sha256;
signature.Certificate = certificate;
signature.ContactInfo = "*****@*****.**";
signature.Location = "Cluj Napoca";
signature.Name = "O2 Solutions Support";
signature.Reason = "Certifying signature";
signField.Signature = signature;
// Certify the document with the signature included in the field.
document.CertifyDocument(signField, PDFDigitalSignatureAllowedChanges.AllowFormFilling);
SampleOutputInfo[] output = new SampleOutputInfo[] { new SampleOutputInfo(document, "certifyingsignature.pdf") };
return(output);
}