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 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);
}
