public static void Sign(string fileName, string signedFileName, string reason, string location,
string privateKeyFileName, string certFileName, string password)
{
PdfReader reader = new PdfReader(fileName);
PdfWriter write = new PdfWriter(signedFileName);
PdfSigner signer = new PdfSigner(reader, write, false);
PdfSignatureAppearance appearance = signer.GetSignatureAppearance();
appearance.SetReason(reason);
appearance.SetLocation(location);
appearance.SetReuseAppearance(false);
Rectangle rect = new Rectangle(36, 648, 200, 100);
appearance.SetPageRect(rect);
appearance.SetPageNumber(1);
signer.SetFieldName("sig");
IExternalSignature pks = new PrivateKeySignature(ReadPrivateKey(privateKeyFileName, password), GetEncryptionAlgorithm());
X509CertificateParser parser = new X509CertificateParser();
X509Certificate cert = LoadCertificate(certFileName);
X509Certificate[] chain = new X509Certificate[1];
chain[0] = cert;
PdfSigner.CryptoStandard subfilter = GetSubFilter();
signer.SignDetached(pks, chain, null, null, null, 0, subfilter);
}
private void BuildSignatureAppearance(PdfSigner signer, Signature signing)
{
// Creating the appearance
PdfSignatureAppearance appearance = signer.GetSignatureAppearance();
appearance.SetReason(signing.SignReason);
appearance.SetContact(signing.SignContact);
appearance.SetLocation(signing.SignLocation);
var arial = PdfFontFactory.CreateFont(Environment.GetEnvironmentVariable("WINDIR") + "\\Fonts\\Arial.ttf", PdfName.WinAnsiEncoding.GetValue(), true);
appearance.SetLayer2Font(arial);
if (!signing.AllowMultiSigning)
{
signer.SetCertificationLevel(PdfSigner.CERTIFIED_FORM_FILLING_AND_ANNOTATIONS);
appearance.SetCertificate(signer.GetSignatureAppearance().GetCertificate());
}
if (signing.DisplaySignatureInDocument)
{
var signPage = SignPageNr(signer, signing);
var left = signing.LeftX;
var bottom = signing.LeftY;
var width = signing.RightX - left;
var height = signing.RightY - bottom;
var rect = new Rectangle(left, bottom, width, height);
appearance.SetPageRect(rect);
appearance.SetPageNumber(signPage);
}
}
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 dest, X509Certificate[] chain, ICipherParameters pk,
String digestAlgorithm, PdfSigner.CryptoStandard subfilter,
int certificationLevel, 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);
appearance.SetLocation(location);
Rectangle rect = new Rectangle(36, 648, 200, 100);
appearance.SetPageRect(rect).SetPageNumber(1);
signer.SetFieldName("sig");
/* Set the document's certification level. This parameter defines if changes are allowed
* after the applying of the signature.
*/
signer.SetCertificationLevel(certificationLevel);
PrivateKeySignature 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 void Sign(String src, String name, String dest, X509Certificate[] chain,
ICipherParameters pk, String digestAlgorithm, PdfSigner.CryptoStandard subfilter,
String reason, String location, PdfSignatureAppearance.RenderingMode renderingMode, ImageData image)
{
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);
appearance.SetLocation(location);
// This name corresponds to the name of the field that already exists in the document.
signer.SetFieldName(name);
appearance.SetLayer2Text("Signed on " + DateTime.Now);
// Set the rendering mode for this signature.
appearance.SetRenderingMode(renderingMode);
// Set the Image object to render when the rendering mode is set to RenderingMode.GRAPHIC
// or RenderingMode.GRAPHIC_AND_DESCRIPTION.
appearance.SetSignatureGraphic(image);
PrivateKeySignature 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);
}
private static void ConfiguraAparencia(PdfSigner objStamper, CertSimples cert, int X, int Y, int Largura, int Altura, int Pagina, int Rotation, string Contact = "", string Reason = "Assinatura Digital", string Location = "Indústrias Nucleares do Brasil S/A - INB", string Creator = "Assinador da INB", TipoAssinatura Tipo = TipoAssinatura.Normal, string Cargo = "", string CREACRM = "")
{
PdfDocument pdfDoc = objStamper.GetDocument();
PdfPage oPage = pdfDoc.GetPage(Pagina);
int LarguraAssinatura = Largura;
int AlturaAssinatura = Altura;
int X_Ajustado, Y_Ajustado;
X_Ajustado = X;
Y_Ajustado = Y;
var crop = oPage.GetCropBox();
float Left, Top, Width, Height;
Bitmap bmp = Graphic.ConfiguraBMP(cert, out Altura, Tipo);
if (Rotation == 270)
{
Left = (int)crop.GetLeft() + X_Ajustado;
Top = (int)crop.GetRight() - (Y_Ajustado + AlturaAssinatura + 5);
}
else if (Rotation == 90)
{
Left = (int)crop.GetRight() + X_Ajustado;
Top = (int)crop.GetLeft() - (Y_Ajustado + AlturaAssinatura + 5);
}
else
{
Left = (int)crop.GetLeft() + X_Ajustado;
Top = (int)crop.GetTop() - (Y_Ajustado + AlturaAssinatura + 5);
}
Width = LarguraAssinatura;
Height = AlturaAssinatura;
iText.Kernel.Geom.Rectangle oRetangulo = new iText.Kernel.Geom.Rectangle(Left, Top, Width, Height);
var pageSize = pdfDoc.GetPage(Pagina).GetMediaBox();
var signaturePosition = new iText.Kernel.Geom.Rectangle(pageSize.GetLeft(), pageSize.GetBottom(), pageSize.GetWidth(), pageSize.GetHeight());
PdfSignatureAppearance signatureAppearance = objStamper.GetSignatureAppearance();
var memoryStream = new MemoryStream();
bmp.Save(memoryStream, System.Drawing.Imaging.ImageFormat.Jpeg);
iText.IO.Image.ImageData pic = iText.IO.Image.ImageDataFactory.Create(memoryStream.ToArray());
signatureAppearance.SetReason(Reason);
signatureAppearance.SetLocation(Location);
signatureAppearance.SetSignatureCreator(Creator);
signatureAppearance.SetSignatureGraphic(pic);
signatureAppearance.SetRenderingMode(PdfSignatureAppearance.RenderingMode.GRAPHIC);
signatureAppearance.SetPageRect(oRetangulo);
signatureAppearance.SetPageNumber(Pagina);
}
public void SignDocument(SigningDocument signingDocument)
{
string KEYSTORE = $"{signingDocument.CertificatDestination}";
char[] PASSWORD = $"{signingDocument.Password}".ToCharArray();
Pkcs12Store pk12 = new Pkcs12Store(new FileStream(KEYSTORE,
FileMode.Open, FileAccess.Read), PASSWORD);
string alias = null;
foreach (object a in pk12.Aliases)
{
alias = ((string)a);
if (pk12.IsKeyEntry(alias))
{
break;
}
}
ICipherParameters pk = pk12.GetKey(alias).Key;
X509CertificateEntry[] ce = pk12.GetCertificateChain(alias);
Org.BouncyCastle.X509.X509Certificate[] chain = new Org.BouncyCastle.X509.X509Certificate[ce.Length];
for (int k = 0; k < ce.Length; ++k)
{
chain[k] = ce[k].Certificate;
}
var f = signingDocument.File.OpenReadStream();
string DEST = $"{signingDocument.destinationSave}\\Signed{signingDocument.File.FileName}";
PdfReader p = new PdfReader(f);
PdfSigner signer = new PdfSigner(p, new FileStream(DEST, FileMode.Create),
new StampingProperties());
PdfSignatureAppearance appearance = signer.GetSignatureAppearance();
appearance.SetLocation(signingDocument.Location)
.SetPageRect(new Rectangle(425, 0, 150, 75))
.SetPageNumber(1);
signer.SetFieldName("MyFieldName");
IExternalSignature pks = new PrivateKeySignature(pk, DigestAlgorithms.SHA256);
signer.SignDetached(pks, chain, null, null, null, 0, PdfSigner.CryptoStandard.CMS);
}
public static byte[] EmptySignature()
{
byte[] Hash = null;
PdfReader reader = new PdfReader(src);
using (FileStream fout = new FileStream(temp, FileMode.Create))
{
StampingProperties sp = new StampingProperties();
sp.UseAppendMode();
PdfSigner pdfSigner = new PdfSigner(reader, fout, sp);
pdfSigner.SetFieldName("Signature");
PdfSignatureAppearance appearance = pdfSigner.GetSignatureAppearance();
appearance.SetPageNumber(1);
appearance.SetPageRect(new Rectangle(100, 100));
appearance.SetLocation("Varazdin");
SHA256 sha = new SHA256CryptoServiceProvider();
String hashAlgorithm = DigestAlgorithms.SHA256;
var externalSignature = new ExternalHashingSignatureContainer(PdfName.Adobe_PPKLite,
PdfName.Adbe_pkcs7_detached);
pdfSigner.SignExternalContainer(externalSignature, 8192);
digest = externalSignature.Hash;
var base64digest = Convert.ToBase64String(digest);
}
PdfReader readerFout = new PdfReader(temp);
FileStream destPdf = new FileStream(dest, FileMode.Create);
PdfSigner pdfSigner2 = new PdfSigner(readerFout, destPdf, new StampingProperties());
var hashBase65 = Convert.ToBase64String(digest);
string signedBase64Hash = String.Empty;
byte[] signedHash = ConvertToBytes(signedBase64Hash);
var container = new MyExternalSignatureContainer(signedHash, GetChains(), Hash);
pdfSigner2.SignExternalContainer(container, 8192);
return(Hash);
}
public void SignAgain(String src, 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().UseAppendMode());
PdfSignatureAppearance appearance = signer.GetSignatureAppearance();
appearance.SetReason(reason);
appearance.SetLocation(location);
appearance.SetReuseAppearance(false);
Rectangle rect = new Rectangle(36, 700, 200, 100);
appearance.SetPageRect(rect).SetPageNumber(1);
signer.SetFieldName("Signature2");
PrivateKeySignature pks = new PrivateKeySignature(pk, digestAlgorithm);
signer.SignDetached(pks, chain, null, null, null, 0, subfilter);
}
/// <summary>
/// Methods which returns base64 digested PDF.
/// </summary>
/// <param name="unsignedPdf">Path to pdf which needs to be signed</param>
/// <param name="tempPdf">Path to temporary pdf</param>
/// <param name="signatureFieldName">Name of field</param>
/// <returns></returns>
public static string GetBytesToSign(string unsignedPdf, string tempPdf, string signatureFieldName)
{
if (File.Exists(tempPdf))
{
File.Delete(tempPdf);
}
using (PdfReader reader = new PdfReader(unsignedPdf))
{
using (FileStream os = File.OpenWrite(tempPdf))
{
StampingProperties sp = new StampingProperties();
sp.UseAppendMode();
PdfSigner pdfSigner = new PdfSigner(reader, os, sp);
pdfSigner.SetFieldName(signatureFieldName);
PdfSignatureAppearance appearance = pdfSigner.GetSignatureAppearance();
appearance.SetPageNumber(1);
appearance.SetPageRect(new Rectangle(100, 100));
appearance.SetLocation("Varazdin");
//Creating container for emty signature, with atrivute where digest is calculated.
//ExternalHashingSignatureContainer external = new ExternalHashingSignatureContainer(PdfName.Adobe_PPKLite, PdfName.Adbe_pkcs7_detached);
//pdfSigner.SignExternalContainer(external, 8192);
//hash = external.Hash;
//Creating container for empty signature.
IExternalSignatureContainer external = new ExternalBlankSignatureContainer(PdfName.Adobe_PPKLite, PdfName.Adbe_x509_rsa_sha1);
pdfSigner.SignExternalContainer(external, 8192);
//Digest from created new temporary PDF with empty space for signature.
FileStream oso = File.OpenRead(temp);
hash = DigestAlgorithms.Digest(oso, DigestAlgorithms.SHA256);
return(Convert.ToBase64String(hash));
}
}
}
public void Sign3(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);
// Set a custom text and background image
appearance.SetLayer2Text("This document was signed by Bruno Specimen");
appearance.SetImage(ImageDataFactory.Create(IMG));
appearance.SetImageScale(1);
PrivateKeySignature 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,
String contact, String fullName)
{
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);
appearance.SetLocation(location);
appearance.SetContact(contact);
signer.SetFieldName(name);
// Set the signature event to allow modification of the signature dictionary.
signer.SetSignatureEvent(new CustomISignatureEvent(fullName));
PrivateKeySignature 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 byte[] GenerirajPotpisaniDokument(byte[] document, string documentName, string signingReason, string signingLocation)
{
try
{
string alias = "";
List <Org.BouncyCastle.X509.X509Certificate> chain = new List <Org.BouncyCastle.X509.X509Certificate>();
var location = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, AppDomain.CurrentDomain.RelativeSearchPath ?? "");
//var destinationPath = $@"Data\{documentName}";
//destinationPath = Path.Combine(location, destinationPath);
var destinationPath = iConfig["DocumentDestinationPath"] + documentName;
var certPath = @"C:\Users\Crega\Source\Repos\PdfSigner\PdfSigner\bin\Debug\netcoreapp3.0\certifikat.pfx";
certPath = Path.Combine(location, certPath);
var cert = File.ReadAllBytes(certPath);
Stream certStream = new MemoryStream(cert);
Pkcs12Store store = new Pkcs12Store(certStream, "12345".ToCharArray());
// searching for private key
foreach (string al in store.Aliases)
{
if (store.IsKeyEntry(al) && store.GetKey(al).Key.IsPrivate)
{
alias = al;
break;
}
}
AsymmetricKeyEntry pk = store.GetKey(alias);
foreach (X509CertificateEntry c in store.GetCertificateChain(alias))
{
chain.Add(c.Certificate);
}
RsaPrivateCrtKeyParameters parameters = pk.Key as RsaPrivateCrtKeyParameters;
Stream documentStream = new MemoryStream(document);
PdfReader reader = new PdfReader(documentStream);
FileStream os = new FileStream(destinationPath, FileMode.Create);
StampingProperties sp = new StampingProperties();
iText.Signatures.PdfSigner signer = new iText.Signatures.PdfSigner(reader, os, sp);
PdfSignatureAppearance appearance = signer.GetSignatureAppearance();
appearance.SetReason(signingReason);
appearance.SetLocation(signingLocation);
appearance.SetContact("*****@*****.**");
//appearance.SetPageRect(new iText.Kernel.Geom.Rectangle(36, 748, 144, 780));
appearance.SetPageNumber(1);
appearance.SetCertificate(chain[0]);
// Creating the signature
IExternalSignature pks = new PrivateKeySignature(parameters, DigestAlgorithms.SHA256);
signer.SignDetached(pks, chain.ToArray(), null, null, null, 0, iText.Signatures.PdfSigner.CryptoStandard.CADES);
//MakeSignature.SignDetached(appearance, pks, chain, null, null, null, 0, PdfSigner.CryptoStandard.CADES);
os.Close();
certStream.Close();
var documentToReturn = File.ReadAllBytes(destinationPath);
File.Delete(destinationPath);
return(documentToReturn);
}
catch (Exception ex)
{
}
return(null);
}
