public void Sign2(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());
PdfSignatureAppearance appearance = signer.GetSignatureAppearance();
appearance.SetReason(reason);
appearance.SetLocation(location);
signer.SetFieldName(name);
// Creating the appearance for layer 2
PdfFormXObject n2 = appearance.GetLayer2();
// Custom text, custom font, and right-to-left writing
// Characters: لورانس العرب
Text text = new Text("\u0644\u0648\u0631\u0627\u0646\u0633 \u0627\u0644\u0639\u0631\u0628");
text.SetFont(PdfFontFactory.CreateFont("../../../resources/font/NotoNaskhArabic-Regular.ttf",
PdfEncodings.IDENTITY_H, true));
text.SetBaseDirection(BaseDirection.RIGHT_TO_LEFT);
new Canvas(n2, signer.GetDocument()).Add(new Paragraph(text).SetTextAlignment(TextAlignment.RIGHT));
IExternalSignature pks = new PrivateKeySignature(pk, digestAlgorithm);
signer.SignDetached(pks, chain, null, null, null, 0, subfilter);
}
public void Sign(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);
// Get the background layer and draw a gray rectangle as a background.
PdfFormXObject n0 = appearance.GetLayer0();
float x = n0.GetBBox().ToRectangle().GetLeft();
float y = n0.GetBBox().ToRectangle().GetBottom();
float width = n0.GetBBox().ToRectangle().GetWidth();
float height = n0.GetBBox().ToRectangle().GetHeight();
PdfCanvas canvas = new PdfCanvas(n0, signer.GetDocument());
canvas.SetFillColor(ColorConstants.LIGHT_GRAY);
canvas.Rectangle(x, y, width, height);
canvas.Fill();
// Set the signature information on layer 2
PdfFormXObject n2 = appearance.GetLayer2();
Paragraph p = new Paragraph("This document was signed by Bruno Specimen.");
new Canvas(n2, signer.GetDocument()).Add(p);
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);
}
public static byte[] Sign(IExternalSignature externalSignature, X509Certificate[] certChain, string src, string friendlyName, string subject, string sourceName, string documentLink, string documentName)
{
int numberOfSignatures = 0;
int numberOfPages = 0;
using (PdfReader reader = new PdfReader(src))
{
using (PdfDocument pdf = new PdfDocument(reader))
{
numberOfPages = pdf.GetNumberOfPages();
PdfAcroForm form = PdfAcroForm.GetAcroForm(pdf, false);
if (form != null)
{
foreach (var field in form.GetFormFields())
{
if (field.Value is iText.Forms.Fields.PdfSignatureFormField)
{
numberOfSignatures++;
}
}
}
}
}
if (numberOfSignatures == 0)
{
string hash = GetMD5HashFromFile(src);
src = AddPage(src, sourceName, documentLink, documentName, hash);
numberOfPages += 1;
}
float posSignY = 615 - (numberOfSignatures * 70);
using (PdfReader reader = new PdfReader(src))
{
StampingProperties stampingProperties = new StampingProperties();
stampingProperties.UseAppendMode();
using (MemoryStream ms = new MemoryStream())
{
PdfSigner signer =
new PdfSigner(reader, ms, stampingProperties);
Rectangle rect = new Rectangle(36, posSignY, 520, 65);
PdfSignatureAppearance appearance = signer.GetSignatureAppearance();
appearance
.SetPageRect(rect)
.SetPageNumber(numberOfPages)
.SetCertificate(certChain[0]);
PdfFormXObject n2 = appearance.GetLayer2();
Canvas canvas = new Canvas(n2, signer.GetDocument());
canvas.Add(new Paragraph(friendlyName).SetMargin(0));
canvas.Add(new Paragraph("Assinado digitalmente por: " + friendlyName).SetFontSize(10).SetMargin(0));
canvas.Add(new Paragraph("Data: " + DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss \"GMT\"zzz")).SetFontSize(10).SetMargin(0));
canvas.Add(new Paragraph("Subject: " + subject).SetFontSize(10).SetMargin(0));
signer.SignDetached(externalSignature, certChain, null, null, null, 0,
PdfSigner.CryptoStandard.CADES);
return(ms.ToArray());
}
}
}