public static SigningCertificates GetSigningCertificates(IDigitalSignatureCertificateSelector certificateSelector)
{
SigningCertificates signingCertificates = new SigningCertificates();
X509CertificateParser parser = new X509CertificateParser();
X509Store x509Store = new X509Store(StoreLocation.CurrentUser);
x509Store.Open(OpenFlags.ReadOnly);
X509Certificate2Collection validCertificates = FindDigitalSignatureCertificates(x509Store);
signingCertificates.X509Certificate2 = certificateSelector.SelectCertificate(validCertificates.Cast<X509Certificate2>());
signingCertificates.X509Certificate = parser.ReadCertificate(signingCertificates.X509Certificate2.Export(X509ContentType.Cert));
signingCertificates.FinalChain = CreateChain(signingCertificates.X509Certificate, signingCertificates.X509Certificate2, parser);
return signingCertificates;
}
private static void CreateSignature(SigningCertificates signingCertificates, PdfSignatureAppearance signatureAppearance, ICollection<ICrlClient> clrClients, IOcspClient oscpClient)
{
IExternalSignature externalSignature = new X509Certificate2Signature(signingCertificates.X509Certificate2, "SHA-1");
MakeSignature.SignDetached(signatureAppearance, externalSignature, signingCertificates.FinalChain, clrClients, oscpClient, null, 0, CryptoStandard.CMS);
}
private static PdfSignatureAppearance GetPdfSignatureAppearance(SigningCertificates signingCertificates, PdfStamper stamper, PdfReader reader, PdfSignatureParameters parameters)
{
PdfSignatureAppearance appearance = stamper.SignatureAppearance;
appearance.Reason = "";
appearance.LocationCaption = "";
appearance.Location = "";
appearance.Layer4Text = "";
appearance.Layer2Text = GetSignatureText(signingCertificates.X509Certificate, parameters);
appearance.Acro6Layers = true;
Rectangle cropBox = reader.GetCropBox(parameters.SignaturePageNumber);
Rectangle rectangle = GetSignatureLocation(cropBox, parameters);
appearance.SetVisibleSignature(rectangle, parameters.SignaturePageNumber, parameters.SignatureName);
return appearance;
}
