Sign PDF with iTextSharp 5.3.3 and USB token

Question

I\'m new to iTextSharp (and StackOverFlow). I\'m trying to sign a PDF in C# using external USB token. I try using the follow code I\'ve digged from the internet.

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Answer 1

The same code as above but uses a certificate file instead of store to sign a PDF document on the last page.

 X509Certificate2 cert = new X509Certificate2("C:\\mycert.p12");

 Org.BouncyCastle.X509.X509CertificateParser cp = new Org.BouncyCastle.X509.X509CertificateParser();
 Org.BouncyCastle.X509.X509Certificate[] chain = new Org.BouncyCastle.X509.X509Certificate[] {
 cp.ReadCertificate(cert.RawData)};

 IExternalSignature externalSignature = new X509Certificate2Signature(cert, "SHA-1");

 PdfReader pdfReader = new PdfReader("C:\\multi-page-pdf.pdf");

 var signedPdf = new FileStream("C:\\multi-page-pdf-signed.pdf", FileMode.Create);

 var pdfStamper = PdfStamper.CreateSignature(pdfReader, signedPdf, '\0');
 PdfSignatureAppearance signatureAppearance = pdfStamper.SignatureAppearance;

 signatureAppearance.SignatureGraphic = Image.GetInstance("C:\\logo.png");
 signatureAppearance.Reason = "Because I can";
 signatureAppearance.Location = "My location";
 signatureAppearance.SetVisibleSignature(new Rectangle(100, 100, 250, 150), pdfReader.NumberOfPages, "Signature");
 signatureAppearance.SignatureRenderingMode = PdfSignatureAppearance.RenderingMode.GRAPHIC_AND_DESCRIPTION;

 MakeSignature.SignDetached(signatureAppearance, externalSignature, chain, null, null, null, 0, CryptoStandard.CMS);

Copy, paste, import needed libraries and go work on something else.