private static PdfPublicKeyEncryptionHandler createEncryptionHandler()
{
// TODO:
// Change the constants, or the sample won't work.
string keyStoreOwner = "key-store-owner.p12";
string passwordOwner = "password";
string keyStoreUser = "******";
string passwordUser = "******";
// You can also use an X509Certificate2 certificate to construct the handler
PdfPublicKeyEncryptionHandler handler = new PdfPublicKeyEncryptionHandler(keyStoreOwner, passwordOwner);
// Add another recipient with non-owner permissions
PdfPermissions permissions = new PdfPermissions();
permissions.Flags = PdfPermissionFlags.FillFormFields | PdfPermissionFlags.PrintDocument;
handler.AddRecipient(keyStoreUser, passwordUser, permissions);
return(handler);
}
public static void Main()
{
// NOTE:
// When used in trial mode, the library imposes some restrictions.
// Please visit http://bitmiracle.com/pdf-library/trial-restrictions.aspx
// for more information.
string pathToFile = "ProtectDocumentWithCertificate.pdf";
using (PdfDocument pdf = new PdfDocument())
{
pdf.Pages[0].Canvas.DrawString("Hello World!");
PdfPublicKeyEncryptionHandler handler = createEncryptionHandler();
handler.Algorithm = PdfEncryptionAlgorithm.Aes256Bit;
var saveOptions = new PdfSaveOptions {
EncryptionHandler = handler
};
pdf.Save(pathToFile, saveOptions);
}
Console.WriteLine($"The output is located in {Environment.CurrentDirectory}");
}
