IText AllowAssembly and StandardEncryption

Question

I am attempting to digitally sign a pdf document while still allowing for the modification of annotations and allowing the adding and removing of pages using itextsharp, Version=4.1.6.0. Below is my current code:

var signatureStamper = PdfStamper.CreateSignature(pdfReader, memoryStream, '\0', null);
signatureStamper.SetEncryption(null, Encoding.UTF8.GetBytes(certificationBundle.Password), PdfWriter.ALLOW_PRINTING | PdfWriter.ALLOW_MODIFY_ANNOTATIONS | PdfWriter.AllowAssembly, PdfWriter.STANDARD_ENCRYPTION_128);

With this configuration however, I am still unable to add and remove pages. Am I Using PdfWriter.AllowAssembly incorrectly?

score 2 · Accepted Answer · edited Jun 20 '20 at 09:12

I am attempting to digitally sign a pdf document while still allowing for the modification of annotations and allowing the adding and removing of pages

Addition or removal of pages is never allowed for signed documents, cf. this stack overflow answer. At most you are allowed to do the following:

Adding signature fields

Adding or editing annotations

Supplying form field values

Digitally signing

IText AllowAssembly and StandardEncryption

1 Answers1