用多种不同的可见数字签名对pdf文件进行数字签名

Question

使用Devexpress或其他任何方法，我可以在页面的不同位置以可见形式签署带有多个签署者的多个数字签名的pdf文件吗？

请参阅我的示例代码。它仅适用于一个数字签名，并且未显示可见的签名形式。

[C#]
    #region #export 
    private void Export() {
        XtraReport1 report = new XtraReport1();


        // Create a new X509Certificate2 object.
        X509Certificate2 certificate = new X509Certificate2();


        // Initialize a local certificate storage and define its options.
        X509Store store = new X509Store(StoreName.My, StoreLocation.CurrentUser);
        store.Open(OpenFlags.ReadOnly | OpenFlags.OpenExistingOnly);


        // Initialize a certificate collection and adjust its work.
        X509Certificate2Collection collection = (X509Certificate2Collection)store.Certificates;
        //X509Certificate2Collection fcollection =
        //    (X509Certificate2Collection)collection.Find(X509FindType.FindByTimeValid, DateTime.Now, true);
        //X509Certificate2Collection scollection =
        //    X509Certificate2UI.SelectFromCollection(fcollection, "Test Certificate Select",
        //        "Select a certificate from the following list to get information on that certificate",
        //        X509SelectionFlag.SingleSelection);
        //if(scollection.Count > 0)
        //    certificate = scollection[0];
        certificate = collection[1];


        // Define the remaining PDF signature options.
        report.ExportOptions.Pdf.SignatureOptions.ContactInfo = "contact info";
        report.ExportOptions.Pdf.SignatureOptions.Location = "location";
        report.ExportOptions.Pdf.SignatureOptions.Reason = "reason";


        // Assign the created certificate to the signature options of the PDF export options.
        report.ExportOptions.Pdf.SignatureOptions.Certificate = certificate;


        // Export the report to a PDF file
        // created in the same folder where the application's .exe file is located.
        report.ExportToPdf("test.pdf");
    }
    #endregion #export

  

在C＃iText Sharp的情况下，请参阅我正在使用的这段代码

    public string DigiSigTest(string src, string dest, X509Certificate2 pk, string reason, string location, string test_path, string WatermarkLocation, string PageNo, string PdfPassword, string SignPos, string[] Custm, string TokenPin, string[] SignImgLoc, string SignImgPath, string Printdocpath, string[] PrintPageNo)
    {
        PdfReader reader1 = (PdfReader)null;
        PdfReader pdfReader = (PdfReader)null;
        PdfStamper pdfStamper1 = (PdfStamper)null;
        PdfStamper pdfStamper2 = (PdfStamper)null;
        PdfReader reader2 = (PdfReader)null;
        MemoryStream memoryStream1 = new MemoryStream();
        MemoryStream memoryStream2 = new MemoryStream();
        try
        {
            string str1 = src;
            pdfReader = new PdfReader(src);
            int num1 = 1;
            int numberOfPages = pdfReader.NumberOfPages;
            pdfReader.Close();
            int num2 = 0;
            int Width = 0;
            int num3 = 0;
            int Height = 0;
            if ((uint)SignImgLoc.Length > 0U)
            {
                num2 = (int)Convert.ToDecimal(SignImgLoc[0]);
                int num4 = (int)Convert.ToDecimal(SignImgLoc[1]);
                int num5 = (int)Convert.ToDecimal(SignImgLoc[2]);
                int num6 = (int)Convert.ToDecimal(SignImgLoc[3]);
                Width = Math.Abs(num5 - num2);
                Height = Math.Abs(num6 - num4);
                num3 = num4 - Height;
            }
            if (DigiSign.IsPasswordProtected(str1))
            {
                byte[] bytes = Encoding.ASCII.GetBytes(PdfPassword);
                pdfReader = new PdfReader(str1, bytes);
            }
            else
                pdfReader = new PdfReader(str1);
            Rectangle rect = new Rectangle((float)(int)Convert.ToDecimal(Custm[0]), (float)(int)Convert.ToDecimal(Custm[1]), (float)(int)Convert.ToDecimal(Custm[2]), (float)(int)Convert.ToDecimal(Custm[3]));
            string str2 = test_path + "/pdf/" + System.IO.Path.GetFileName(dest);
            PdfReader.unethicalreading = true;
            if (DigiSign.IsPasswordProtected(str1))
            {
                byte[] bytes = Encoding.ASCII.GetBytes(PdfPassword);
                reader1 = new PdfReader(str1, bytes);
            }
            else
                reader1 = new PdfReader(str1);
            pdfStamper1 = new PdfStamper(reader1, (Stream)memoryStream1, char.MinValue, true);
            PdfFormField signature = PdfFormField.CreateSignature(pdfStamper1.Writer);
            signature.SetWidget(rect, (PdfName)null);
            signature.Flags = 4;
            signature.FieldName = "Signature";
            signature.SetPage();
            for (int index = num1; index <= numberOfPages; ++index)
            {
                pdfStamper1.AddAnnotation((PdfAnnotation)signature, index);
                if (PageNo == "FL")
                {
                    pdfStamper1.AddAnnotation((PdfAnnotation)signature, numberOfPages);
                    break;
                }
            }
            pdfStamper1.Close();
            reader1.Close();
            File.WriteAllBytes(str2, memoryStream1.ToArray());
            memoryStream1.Close();
            if (TokenPin.Trim() != "")
            {
                SecureString securePin = this.GetSecurePin(TokenPin);
                RSACryptoServiceProvider privateKey = (RSACryptoServiceProvider)pk.PrivateKey;
                RSACryptoServiceProvider cryptoServiceProvider = new RSACryptoServiceProvider(new CspParameters(1, privateKey.CspKeyContainerInfo.ProviderName, privateKey.CspKeyContainerInfo.KeyContainerName, new CryptoKeySecurity(), securePin));
            }
            if (DigiSign.IsPasswordProtected(str2))
            {
                byte[] bytes = Encoding.ASCII.GetBytes(PdfPassword);
                reader2 = new PdfReader(str2, bytes);
            }
            else
                reader2 = new PdfReader(str2);
            pdfStamper2 = PdfStamper.CreateSignature(reader2, (Stream)memoryStream2, char.MinValue, null, true);
            PdfSignatureAppearance signatureAppearance = pdfStamper2.SignatureAppearance;
            if (reason.Trim() != "")
                signatureAppearance.Reason = reason;
            if (location.Trim() != "")
                signatureAppearance.Location = location;
            signatureAppearance.CertificationLevel = 0;
            signatureAppearance.SignatureRenderingMode = PdfSignatureAppearance.RenderingMode.DESCRIPTION;
            signatureAppearance.Acro6Layers = false;
            signatureAppearance.SetVisibleSignature("Signature");
            if ((uint)SignImgLoc.Length > 0U)
            {
                Image image = DigiSign.resizeImage(Width, Height, SignImgPath);
                image.SetAbsolutePosition((float)num2, (float)num3);
                for (int pageNum = num1; pageNum <= numberOfPages; ++pageNum)
                {
                    pdfStamper2.GetOverContent(pageNum).AddImage(image);
                    if (PageNo == "FL")
                    {
                        pdfStamper2.GetOverContent(numberOfPages).AddImage(image);
                        break;
                    }
                }
            }
            List<Org.BouncyCastle.X509.X509Certificate> x509CertificateList = new List<Org.BouncyCastle.X509.X509Certificate>()
    {
      DotNetUtilities.FromX509Certificate((System.Security.Cryptography.X509Certificates.X509Certificate) pk)
    };
            IExternalSignature externalSignature = (IExternalSignature)new X509Certificate2Signature(pk, "SHA-256");
            MakeSignature.SignDetached(signatureAppearance, externalSignature, (ICollection<Org.BouncyCastle.X509.X509Certificate>)x509CertificateList, (ICollection<ICrlClient>)null, (IOcspClient)null, (ITSAClient)null, 0, CryptoStandard.CMS);
            File.WriteAllBytes(dest, memoryStream2.ToArray());
            File.Delete(str2);
            pdfStamper2.Close();
            reader2.Close();
            return "SUCCESS";
        }
        catch (Exception ex)
        {
            return ex.Message;
        }
        finally
        {
            if (pdfStamper1 != null)
                pdfStamper1.Close();
            if (pdfStamper2 != null)
                pdfStamper2.Close();
            if (reader1 != null)
                reader1.Close();
            if (reader2 != null)
                reader2.Close();
            if (memoryStream1 != null)
                memoryStream1.Close();
            if (memoryStream2 != null)
                memoryStream2.Close();
            if (pdfReader != null)
                pdfReader.Close();
        }
    }

Answer 1

按照mkl所说， 我已替换

signature.FieldName = "Signature";

到

signature.FieldName = (pk.GetNameInfo(X509NameType.SimpleName, false)).Replace(' ', '_');

AND

signatureAppearance.SetVisibleSignature("Signature1");

到

signatureAppearance.SetVisibleSignature((pk.GetNameInfo(X509NameType.SimpleName, false)).Replace(' ', '_'));

谢谢。