public static byte[] AssinarPDF(ref byte[] dadosArquivo) { var configuration = ConfigurationManager.ConfigurationManager.AppSettings; Assinar objAssinar = new Assinar(); return(objAssinar.AssinarPdfStreamCert(ref dadosArquivo, configuration["Certificado:RepositorioCertificado"], configuration["Certificado:ThumberPrint"])); }
private MemoryStream Assinar2(MemoryStream ArquivoOrigem, X509Certificate2 cert, ref byte[] pkcs7) { this.card = cert; X509CertificateParser x509CertificateParser = new X509CertificateParser(); Org.BouncyCastle.X509.X509Certificate[] array = new Org.BouncyCastle.X509.X509Certificate[] { x509CertificateParser.ReadCertificate(this.card.RawData) }; PdfReader reader = new PdfReader(ArquivoOrigem); MemoryStream memoryStream = new MemoryStream(); PdfStamper pdfStamper = PdfStamper.CreateSignature(reader, memoryStream, '\0', null, true); PdfSignatureAppearance signatureAppearance = pdfStamper.SignatureAppearance; signatureAppearance.SetCrypto(null, array, null, PdfSignatureAppearance.SELF_SIGNED); signatureAppearance.Reason = this.proposito; signatureAppearance.Contact = this.contato; signatureAppearance.Location = this.localizacao; signatureAppearance.CryptoDictionary = new PdfSignature(PdfName.ADOBE_PPKLITE, new PdfName("adbe.pkcs7.detached")) { Reason = signatureAppearance.Reason, Location = signatureAppearance.Location, Contact = signatureAppearance.Contact, Date = new PdfDate(signatureAppearance.SignDate) }; int num = 15000; Dictionary <PdfName, int> dictionary = new Dictionary <PdfName, int>(); dictionary[PdfName.CONTENTS] = num * 2 + 2; signatureAppearance.PreClose(dictionary); //PdfPKCS7 pdfPKCS = new PdfPKCS7(null, array, null, "SHA1", false); PdfPKCS7 pdfPKCS = new PdfPKCS7(null, array, null, "MD5", false); IDigest digest = DigestUtilities.GetDigest("MD5"); Stream rangeStream = signatureAppearance.GetRangeStream(); byte[] array2 = new byte[8192]; int length; while ((length = rangeStream.Read(array2, 0, array2.Length)) > 0) { digest.BlockUpdate(array2, 0, length); } byte[] array3 = new byte[digest.GetDigestSize()]; digest.DoFinal(array3, 0); DateTime now = DateTime.Now; byte[] ocsp = null; if (array.Length >= 2) { string oCSPURL = PdfPKCS7.GetOCSPURL(array[0]); if (oCSPURL != null && oCSPURL.Length > 0) { ocsp = new OcspClientBouncyCastle().GetEncoded(array[0], array[1], oCSPURL); } } byte[] authenticatedAttributeBytes = pdfPKCS.GetAuthenticatedAttributeBytes(array3, now, ocsp); byte[] digest2 = Assinar.SignSHA1withRSA(this.card, authenticatedAttributeBytes); pdfPKCS.SetExternalDigest(digest2, array3, "RSA"); byte[] array4 = new byte[num]; byte[] encodedPKCS = pdfPKCS.GetEncodedPKCS7(array3, now, null, ocsp); pkcs7 = encodedPKCS; Array.Copy(encodedPKCS, 0, array4, 0, encodedPKCS.Length); if (num + 2 < encodedPKCS.Length) { throw new ApplicationException("Não há espaço suficiente para assinatura."); } PdfDictionary pdfDictionary = new PdfDictionary(); pdfDictionary.Put(PdfName.CONTENTS, new PdfString(array4).SetHexWriting(true)); signatureAppearance.Close(pdfDictionary); //pdfStamper. return(memoryStream); }