Convert to a password-encrypted PDF file in C# and .NET
Difference between OwnerPassword and UserPassword.
PDF Metamorphosis .Net and p.PdfSettings.PdfSecurity.UserPassword = "0987654321";
The user password will be required to open an encrypted PDF document for viewing.
The permissions specified in SautinSoft.Document.PdfEncryptionDetails.Permissions will be enforced by the reader software.
The user password can be null or empty string, in this case no password will be required from the user when opening the PDF document. The user password cannot be the same as the owner password.
For example, if you open PDF file in an Viewer and insert the password - "0987654321", you will see, that you may READ only of this PDF file because you are the user of this file:
Document Properties -> Security ->
Document Restrictions Summary -> Not Allowed.
PDF Metamorphosis .Net and p.PdfSettings.PdfSecurity.OwnerPassword = "1234567890";
The owner password allows the user to open an encrypted PDF document without any access restrictions specified in SautinSoft.Document.PdfEncryptionDetails.Permissions.
The owner password cannot be the same as the
user password. If you don't specify an owner password, then the system will generate a random password when generating the PDF document.
For example, if you open PDF file in an Viewer and insert the password - "1234567890", you will see, that you may edit, printing this PDF file because you are the owner of this file:
Document Properties -> Security ->
Document Restrictions Summary -> Allowed.
Complete code
GitHubusing System.IO;
namespace Sample
{
class Test
{
static void Main(string[] args)
{
// Before starting, we recommend to get a free 100-day key:
// https://sautinsoft.com/start-for-free/
// Apply the key here:
// SautinSoft.PdfMetamorphosis.SetLicense("...");
// Contains details for encrypting and access permissions for a PDF document.
SautinSoft.PdfMetamorphosis p = new SautinSoft.PdfMetamorphosis();
// Specify the owner password for the encrypted PDF document.
p.PdfSettings.PdfSecurity.OwnerPassword = "1234567890";
// Specify the user's password required to open the encrypted PDF document.
p.PdfSettings.PdfSecurity.UserPassword = "0987654321";
if (p != null)
{
string rtfPath = @"..\..\..\example.rtf";
string pdfPath = Path.ChangeExtension(rtfPath, ".pdf");
int i = p.RtfToPdfConvertFile(rtfPath, pdfPath);
if (i != 0)
{
System.Console.WriteLine("An error occurred during converting RTF to PDF!");
}
else
{
System.Diagnostics.Process.Start(new System.Diagnostics.ProcessStartInfo(pdfPath) { UseShellExecute = true });
}
}
}
}
}
Imports System.IO
Namespace Sample
Friend Class Test
Shared Sub Main(ByVal args() As String)
' Before starting, we recommend to get a free 100-day key:
' https://sautinsoft.com/start-for-free/
' Apply the key here:
' SautinSoft.PdfMetamorphosis.SetLicense("...");
Dim p As New SautinSoft.PdfMetamorphosis()
' Specify the owner password for the encrypted PDF document.
p.PdfSettings.PdfSecurity.OwnerPassword = "1234567890"
' Specify the user's password required to open the encrypted PDF document.
p.PdfSettings.PdfSecurity.UserPassword = "0987654321"
If p IsNot Nothing Then
Dim rtfPath As String = "..\..\..\example.rtf"
Dim pdfPath As String = Path.ChangeExtension(rtfPath, ".pdf")
Dim i As Integer = p.RtfToPdfConvertFile(rtfPath, pdfPath)
If i <> 0 Then
System.Console.WriteLine("An error occurred during converting RTF to PDF!")
Else
System.Diagnostics.Process.Start(New System.Diagnostics.ProcessStartInfo(pdfPath) With {.UseShellExecute = True})
End If
End If
End Sub
End Class
End Namespace
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