public static void Sign(IExternalSignature externalSignature, X509Certificate2 rawCertificate, string sourcePdfPath, string destinationPdfPath)
{
if (externalSignature == null)
{
throw new ArgumentNullException(nameof(externalSignature));
}
if (rawCertificate == null)
{
throw new ArgumentNullException(nameof(rawCertificate));
}
if (sourcePdfPath == null)
{
throw new ArgumentNullException(nameof(sourcePdfPath));
}
if (destinationPdfPath == null)
{
throw new ArgumentNullException(nameof(destinationPdfPath));
}
using PdfReader reader = new PdfReader(sourcePdfPath);
Org.BouncyCastle.X509.X509Certificate bCert = Org.BouncyCastle.Security.DotNetUtilities.FromX509Certificate(rawCertificate);
Org.BouncyCastle.X509.X509Certificate[] chain = new Org.BouncyCastle.X509.X509Certificate[] { bCert };
using FileStream stream = new FileStream(destinationPdfPath, FileMode.OpenOrCreate);
PdfSigner signer = new PdfSigner(reader, stream, new StampingProperties());
signer.SetSignatureEvent(new SignatureEvent());
signer.SignDetached(externalSignature, chain, null, null, null, 0, PdfSigner.CryptoStandard.CADES);
}
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);
}