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.");
}
