// // This code is part of Document Solutions for PDF demos. // Copyright (c) MESCIUS inc. All rights reserved. // using System; using System.IO; using System.Drawing; using System.Text; using System.Collections.Generic; using System.Security.Cryptography; using System.Security.Cryptography.X509Certificates; using GrapeCity.Documents.Pdf; using GrapeCity.Documents.Pdf.Security; using GrapeCity.Documents.Pdf.AcroForms; using GrapeCity.Documents.Text; namespace DsPdfWeb.Demos { // This sample shows how to sign a PDF with a .p12 file // containing a digital certificate that uses PKCS#12 // (Public Key Cryptography Standard #12) encryption. public class SignWithP12 { public int CreatePDF(Stream stream) { var doc = new GcPdfDocument(); using var s = File.OpenRead(Path.Combine("Resources", "PDFs", "SignWithP12.pdf")); doc.Load(s); var p12 = Path.Combine("Resources", "Misc", "DsPdfTest2KeyStore.p12"); var sp = new SignatureProperties() { SignatureBuilder = new Pkcs7SignatureBuilder() { CertificateChain = SecurityUtils.GetCertificateChain(p12, "qq"), }, SignatureField = doc.AcroForm.Fields[0], }; sp.SignatureAppearance.Caption = "PKCS #12"; doc.Sign(sp, stream); // Done. return doc.Pages.Count; } } }