Beispiel #1
0
        static void Main(string[] args)
        {
            PDFNet.Initialize();

            // Relative path to the folder containing test files.
            string input_path  = "../../TestFiles/";
            string output_path = "../../TestFiles/Output/";

            // Example 1: Securing a document with password protection and adjusting permissions
            // on the document.
            try
            {
                // Open the test file
                Console.WriteLine("-------------------------------------------------");
                Console.WriteLine("Securing an existing document...");
                using (PDFDoc doc = new PDFDoc(input_path + "fish.pdf"))
                {
                    if (!doc.InitSecurityHandler())
                    {
                        Console.WriteLine("Document authentication error...");
                        return;
                    }

                    // Perform some operation on the document. In this case we use low level SDF API
                    // to replace the content stream of the first page with contents of file 'my_stream.txt'
                    if (true)                      // Optional
                    {
                        Console.WriteLine("Replacing the content stream, use flate compression...");

                        // Get the first page dictionary using the following path: trailer/Root/Pages/Kids/0
                        Obj page_dict = doc.GetTrailer().Get("Root").Value().
                                        Get("Pages").Value().Get("Kids").Value().GetAt(0);

                        // Embed a custom stream (file mystream.txt) using Flate compression.
                        MappedFile   embed_file = new MappedFile(input_path + "my_stream.txt");
                        FilterReader mystm      = new FilterReader(embed_file);
                        page_dict.Put("Contents", doc.CreateIndirectStream(mystm));
                        embed_file.Close();
                    }

                    // Apply a new security handler with given security settings.
                    // In order to open saved PDF you will need a user password 'test'.
                    SecurityHandler new_handler = new SecurityHandler();
                    // Set a new password required to open a document
                    string my_password = "******";
                    new_handler.ChangeUserPassword(my_password);

                    // Set Permissions
                    new_handler.SetPermission(SecurityHandler.Permission.e_print, true);
                    new_handler.SetPermission(SecurityHandler.Permission.e_extract_content, false);

                    // Note: document takes the ownership of new_handler.
                    doc.SetSecurityHandler(new_handler);

                    // Save the changes.
                    Console.WriteLine("Saving modified file...");
                    doc.Save(output_path + "secured.pdf", 0);
                }

                Console.WriteLine("Done. Result saved in secured.pdf");
            }
            catch (PDFNetException e)
            {
                Console.WriteLine(e.Message);
            }

            // Example 2: Reading password protected document without user feedback.
            try
            {
                // In this sample case we will open an encrypted document that
                // requires a user password in order to access the content.
                Console.WriteLine("-------------------------------------------------");
                Console.WriteLine("Open the password protected document from the first example...");
                using (PDFDoc doc = new PDFDoc(output_path + "secured.pdf"))                    // Open the encrypted document that we saved in the first example.
                {
                    Console.WriteLine("Initializing security handler without any user interaction...");

                    // At this point MySecurityHandler callbacks will be invoked.
                    // MySecurityHandler.GetAuthorizationData() should collect the password and
                    // AuthorizeFailed() is called if user repeatedly enters a wrong password.
                    if (!doc.InitStdSecurityHandler("test"))
                    {
                        Console.WriteLine("Document authentication error...");
                        Console.WriteLine("The password is not valid.");
                        return;
                    }
                    else
                    {
                        Console.WriteLine("The password is correct! Document can now be used for reading and editing");

                        // Remove the password security and save the changes to a new file.
                        doc.RemoveSecurity();
                        doc.Save(output_path + "secured_nomore1.pdf", 0);
                        Console.WriteLine("Done. Result saved in secured_nomore1.pdf");
                    }
                }
            }
            catch (PDFNetException e)
            {
                Console.WriteLine(e.Message);
            }

            Console.WriteLine("Tests completed.");
        }