This question has been asked before, but I cannot find an answer anywhere.
For XFA forms, adobe reader adds a checksum in the <form> tag when saving. I'm trying to automatically fill an xfa form, and I need to calculate that checksum. Is there any documentation about how to perform that calculation?
Oh I see. I am not sure that PDFBox can write XFA data. This checksum must be created by the manipulating software and uses certain parts of the XFA section. I cannot tell you which ones and how you would calculate that. I collected a number of links that might help you: