Question

I use the following code :

string WorkingFolder = Environment.GetFolderPath(Environment.SpecialFolder.Desktop);
string InputFile = Path.Combine(WorkingFolder, "PSNOs.pdf");
string OutputFile = Path.Combine(WorkingFolder, "PSNOs_enc.pdf");
using (Stream input = new FileStream(InputFile, FileMode.Open, FileAccess.Read, FileShare.Read))
{
    using (Stream output = new FileStream(OutputFile, FileMode.Create, FileAccess.Write, FileShare.None))
    {
        PdfReader reader = new PdfReader(input);
        PdfEncryptor.Encrypt(reader, output, true, null, "secret", PdfWriter.ALLOW_SCREENREADERS);
    }
} 

But it is creating another file and adding password to the output file.
But I don’t want to create two files like the above. I want to give the password for the input file PSNOs.pdf with out creating the other file.

Answer 1

It must be done this way unfortunately.

I would suggest you:

1. Create the unsigned PDF in the system TEMP folder
2. Sign it, outputting to the location and file name you want
3. Clean up – delete the temp file.