private void BuildSignatureAppearance(PdfSigner signer, Signature signing)
{
// Creating the appearance
PdfSignatureAppearance appearance = signer.GetSignatureAppearance();
appearance.SetReason(signing.SignReason);
appearance.SetContact(signing.SignContact);
appearance.SetLocation(signing.SignLocation);
var arial = PdfFontFactory.CreateFont(Environment.GetEnvironmentVariable("WINDIR") + "\\Fonts\\Arial.ttf", PdfName.WinAnsiEncoding.GetValue(), true);
appearance.SetLayer2Font(arial);
if (!signing.AllowMultiSigning)
{
signer.SetCertificationLevel(PdfSigner.CERTIFIED_FORM_FILLING_AND_ANNOTATIONS);
appearance.SetCertificate(signer.GetSignatureAppearance().GetCertificate());
}
if (signing.DisplaySignatureInDocument)
{
var signPage = SignPageNr(signer, signing);
var left = signing.LeftX;
var bottom = signing.LeftY;
var width = signing.RightX - left;
var height = signing.RightY - bottom;
var rect = new Rectangle(left, bottom, width, height);
appearance.SetPageRect(rect);
appearance.SetPageNumber(signPage);
}
}
public void Sign1(String src, String name, String dest, X509Certificate[] chain,
ICipherParameters pk, String digestAlgorithm, PdfSigner.CryptoStandard subfilter,
String reason, String location)
{
PdfReader reader = new PdfReader(src);
PdfSigner signer = new PdfSigner(reader, new FileStream(dest, FileMode.Create), new StampingProperties());
// Create the signature appearance
PdfSignatureAppearance appearance = signer.GetSignatureAppearance();
appearance
.SetReason(reason)
.SetLocation(location);
// This name corresponds to the name of the field that already exists in the document.
signer.SetFieldName(name);
// Set the custom text and a custom font
appearance.SetLayer2Text("This document was signed by Bruno Specimen");
appearance.SetLayer2Font(PdfFontFactory.CreateFont(StandardFonts.TIMES_ROMAN));
IExternalSignature pks = new PrivateKeySignature(pk, digestAlgorithm);
// Sign the document using the detached mode, CMS or CAdES equivalent.
signer.SignDetached(pks, chain, null, null, null, 0, subfilter);
}
