pdftk and qpdf to reset PDF commenting security
Solution 1
The command qpdf --decrypt input.pdf output.pdf
removes the 'owner' password. But it only works if there is no 'user' password set.
Once the owner password is removed, the output.pdf
should already have unset all security protection and have allowed commenting. Needless to run your extra pdftk ...
command then... BTW, your allow
parameter in your pdftk
call will not work the way you quoted your command. The allow
permissions will only be applied if you also...
- ...either specify an encryption strength
- ...or give a user or an owner password
Try the following to find out the detailed security settings of the file(s):
qpdf --show-encryption input.pdf
qpdf --show-encryption output.pdf
Solution 2
The question is a common one and the answer is simple. Do not use acroread to check a document's security settings. qpdf is correctly removing the restrictions, but acroread does not know that.
Acroread is purposefully limited by Adobe so that it will not compete with Acrobat. (For example, you can type in forms, but you can't save the document).
user989762
Updated on June 05, 2022Comments
-
user989762 almost 2 years
to be able to add annotations to a pdf file in linux, i have to reset the "Commenting" security setting in the pdf document.
qpdf --decrypt input.pdf output.pdf
should remove any passwords or "encryption" (according to this post)pdftk input input.pdf output output.pdf allow AllFeatures
should set all document securities (including "Commenting") to be allowedAfter applying both commands, in acroread i can still see (file -> document -> security tab) that commenting is not allowed.
How can I reset this security property?