public void Sign(string sigReason, string sigContact, string sigLocation, bool visible)
{
PdfReader reader = new PdfReader(inputPDF);
//Activate MultiSignatures
PdfStamper st = PdfStamper.CreateSignature(reader, new FileStream(outputPDF, FileMode.Create, FileAccess.Write), '\0', null, true);
//To disable Multi signatures uncomment this line : every new signature will invalidate older ones !
//PdfStamper st = PdfStamper.CreateSignature(reader, new FileStream(outputPDF, FileMode.Create, FileAccess.Write), '\0');
st.MoreInfo = metadata.GetMetaData();
st.XmpMetadata = metadata.GetStreamedMetaData();
PdfSignatureAppearance sap = st.SignatureAppearance;
sap.SetCrypto(myCert.Akp, myCert.Chain, null, PdfSignatureAppearance.WINCER_SIGNED);
sap.Reason = sigReason;
sap.Contact = sigContact;
sap.Location = sigLocation;
if (visible)
{
sap.SetVisibleSignature(new iTextSharp.text.Rectangle(100, 100, 250, 150), 1, null);
}
st.Close();
}
