Am 20.07.2016 um 21:37 schrieb Keith R Wood:
I am trying to change the attributes "Content Copying" and "Content Copying for
Accessibility" on a PDF received from a third party.
I'm not sure if this is possible, but am unable to find anything that says it
is not allowed.
Here is what I can tell you about the PDF.
Both "Content Copying and Content Copying for Accessibility are currently set to
"Allowed".
The PDF is NOT read only.
The "Owner Permission" is set to false (which I am thinking may be key).
I set both attributes to false, I then save the document and close the document.
The time stamp of the document gets updated, but the attributes remain
unchanged.
Below is sample code and output:
PDDocument doc = PDDocument.load(pdfFile);
canExtract =
doc.getCurrentAccessPermission().canExtractContent();
canExtractFA =
doc.getCurrentAccessPermission().canExtractForAccessibility();
canExtract_owner =
doc.getCurrentAccessPermission().getOwnerAccessPermission().canExtractContent();
canExtractFA_owner =
doc.getCurrentAccessPermission().getOwnerAccessPermission().canExtractForAccessibility();
readOnly = doc.getCurrentAccessPermission().isReadOnly();
ownerPermission = doc.getCurrentAccessPermission().isOwnerPermission();
doc.getCurrentAccessPermission().setCanExtractForAccessibility(false);
doc.getCurrentAccessPermission().setCanExtractContent(false);
doc.getCurrentAccessPermission().getOwnerAccessPermission().setCanExtractContent(false);
doc.getCurrentAccessPermission().getOwnerAccessPermission().setCanExtractForAccessibility(false);
if ap is your access permission, then do this before saving:
StandardProtectionPolicy spp =
new
StandardProtectionPolicy("secretpassword", "", ap);
spp.setEncryptionKeyLength(256); // not really
needed...
document.protect(spp);
You can also leave the default key length... PDF security for
permissions only (i.e. empty user psw) is not real security anyway.
Tilman
doc.save(pdfFile);
doc.close();
canExtract-true, canExtractFA-
Thank you
_____________________________________________________
Keith Wood | Applications Program Lead | United Guaranty Corporation
300 N. Greene St. | Greensboro, NC 27401
Phone: 336.334.8547
[email protected]<mailto:[email protected]>
www.ugcorp.com<http://www.ugcorp.com/>
____________________________
----------------------------------------------------------------------
--------------------------------------------------------------------------
United Guaranty is a marketing term for United Guaranty Corporation and its
subsidiaries. This communication from United Guaranty Corporation or its
subsidiary is directed to and is for the use of the individual or entity to
which it is addressed. It may contain information that is confidential and
exempt from disclosure under applicable law. If you are not the intended
recipient, you are hereby notified that any distribution, dissemination, or
copy of this communication is strictly prohibited. If you have received this
communication in error, please contact the sender immediately, and then delete
or destroy the material in its entirety. United Guaranty Corporation and its
subsidiaries
230 North Elm Street
Greensboro, NC 27401
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
