PDFsharp Sample: Protect Document

Modified on 2015/09/14 10:21 by Thomas Hövel Categorized as PDFsharp Samples, Samples

{s:navigationPrevUpNext|PrivateFonts-sample|PDFsharpSamples|SplitDocument-sample}
This sample shows how to protect a document with a password.

==PDF Output File==

See the PDF file created by this sample:  {s:PdfLink|ProtectDocument-sample%2fProtectDocument_output.pdf|output.pdf} (3 kB){br}
{s:note} the owner password is "owner". 

==Screen Shots==
Here are the sample screen shots:

{s:ImageThumbLink|Adobe Reader prompts for password|ProtectDocument-sample%2fProtectDocumentth.png|ProtectDocument-sample%2fProtectDocument.png}
{s:ImageThumbLink|File is marked as SECURED|ProtectDocument-sample%2fProtectDocument2th.png|ProtectDocument-sample%2fProtectDocument2.png}{br}
{s:note} Adobe Reader prompts for the password when you try to open the file (remember the secret password is "owner"); when the file is opened, the caption indicates "SECURED".

==Source Code==

This is the whole source code needed to create the PDF file:
{s:beginCsharp}
// Get a fresh copy of the sample PDF file
const string filenameSource = "HelloWorld.pdf";
const string filenameDest = "HelloWorld_tempfile.pdf";
File.Copy(Path.Combine("../../../../../PDFs/", filenameSource), 
  Path.Combine(Directory.GetCurrentDirectory(), filenameDest), true);
&nbsp;
// Open an existing document. Providing an unrequired password is ignored.
PdfDocument document = PdfReader.Open(filenameDest, "some text");
&nbsp;
PdfSecuritySettings securitySettings = document.SecuritySettings;
&nbsp;
// Setting one of the passwords automatically sets the security level to 
// PdfDocumentSecurityLevel.Encrypted128Bit.
securitySettings.UserPassword  = "user";
securitySettings.OwnerPassword = "owner";
&nbsp;
// Don't use 40 bit encryption unless needed for compatibility
//securitySettings.DocumentSecurityLevel = PdfDocumentSecurityLevel.Encrypted40Bit;
&nbsp;
// Restrict some rights.
securitySettings.PermitAccessibilityExtractContent = false;
securitySettings.PermitAnnotations = false;
securitySettings.PermitAssembleDocument = false;
securitySettings.PermitExtractContent = false;
securitySettings.PermitFormsFill = true;
securitySettings.PermitFullQualityPrint = false;
securitySettings.PermitModifyDocument = true;
securitySettings.PermitPrint = false;
&nbsp;
// Save the document...
document.Save(filenameDest);
// ...and start a viewer.
Process.Start(filenameDest);
{s:endCsharp}

{s:sampleSourceCode}

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PDFsharp Sample: Protect Document