Password protected file can be view without password

[xiao0207]

Hi Team..

we recently encountered an unusual occurrence. Normally, when attempting to load a password-protected PDF an error will be triggered, and we will catch this error and informing users of the password protection. However, we have tested a file that loads without requiring a password. Yet, when viewed through Adobe/Chrome/Edge browser, it prompts for a password as usual.

The spire pdf version that we are using is 8.1.8.13040. We would appreciate your input on the possible causes of this issue and is there a way for us to investigate further?

[William.Zhang]

Hello，

Thanks for your inquiry.
Sorry, based on your description, we are unable to determine the cause of your issue. For the convenience of our further investigation, please send your PDF file and test code to this post or to this email: [email protected]. Thank you in advance.

Sincerely,
William
E-iceblue support team

[xiao0207]

Hi William.Zhang

I have sent you the test file via email, and below is my code:

Code: Select all

try{
   PdfDocument pdffile = new PdfDocument();
   pdffile.LoadFromFile(file);
        //password protected file should trigger the error here

   var pageNumber = pdffile.Pages.Count;
   for (int i = fromPage; i < pageNumber && i <= untilPage; i++)
   {   
      Image images = pdffile.SaveAsImage(i, Spire.Pdf.Graphics.PdfImageType.Bitmap, res, res);
      ...      
   }
}catch (Exception ex)
{
   //password protected file will catch error here
}


[William.Zhang]

Hello,

Thanks for more information.
Yes,I did reproduce the issue you mentioned. I have logged the issue into our bug tracking system with the ticket number SPIREPDF-6598. Our development team will investigate and fix it. Once it is resolved, I will inform you in time. Sorry for the inconvenience caused.

Sincerely,
William
E-iceblue support team

[William.Zhang]

Hello,

Thank you for your patience.
The latest version of Spire.PDF Pack(Hot Fix) Version:10.4.2 has already fixed the issue SPIREPDF-6598. Please update and test it.
Website link: https://www.e-iceblue.com/Download/down ... t-now.html
Nuget link: https://www.nuget.org/packages/Spire.PDF/10.4.2

Sincerely,
William
E-iceblue support team