Make PDF read only

[thusharagokulnath]

I would like to know is there any method to make PDF read only using the pyPDF extension?
I tried to read few issues related to this, but couldn't find exact answer.

[stefan6419846]

What do you mean by making it read-only? Some PDF viewers might open PDF/A documents as read-only by default.

Additionally, you might want to have a look at setting an owner password and corresponding user access permissions, for example writer.encrypt(user_password="", owner_password="abc", permissions_flag=UserAccessPermissions(0)).

[thusharagokulnath]

Thank you for the reply. I have tried all the UAP given. Is there any approach to disable only specific fields ?

[pubpub-zz]

you should have a look at Pdf Spec to Ff entry (applicable to all fields)

this should make readonly the fields you are looking for

[thusharagokulnath]

Can you please provide a code snippet for this

[pubpub-zz]

Something like that

import pypdf
r = pypdf.PdfReader("resources/FormTestFromOo.pdf")
for k,v in r.get_fields():
    o = v.indirect_reference.get_object()
    if o["/FT"] != "/Sig":
        o[pypdf.generic.NameObject("/Ff")] = pypdf.generic.NumberObject(o.get("/Ff",0) | 1)

[thusharagokulnath]

Thank you

[pubpub-zz]

you should also have a look in the manual:
https://pypdf.readthedocs.io/en/stable/modules/PdfWriter.html#pypdf.PdfWriter.update_page_form_field_values

[Usouf]

Something like that

import pypdf
r = pypdf.PdfReader("resources/FormTestFromOo.pdf")
for k,v in r.get_fields():
    o = v.indirect_reference.get_object()
    if o["/FT"] != "/Sig":
        o[pypdf.generic.NameObject("/Ff")] = pypdf.generic.NumberObject(o.get("/Ff",0) | 1)

change the code to the following:
for k,v in r.get_fields().items():