[PDFBOX-1453] NPE saving modified encrypted document

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.8.7, 1.8.9, 1.8.10, 2.0.0
• Fix Version/s: 1.8.10
• Component/s: Crypto, Writing
• Assignee: Andreas Lehmkühler
• Reporter: Andrea Vacondio
• Created: 26/Nov/12 19:31
• Updated: 23/Jul/15 06:35
• Resolved: 30/Jun/15 18:08

Description

I posted this on the mailing list but got no answer. I'm describing here some behaviors that are triggering NPE when saving a modified pdf document.
What I'm trying to do is to open an encrypted document, modify it, save it back (I attached my test project). The three tests I made they all end up with a NPE but they work if I turn on setAllSecurityToBeRemoved (and I don't want security to be removed).

First test:
1- input is a doc encrypted with owner pwd having the modify permission on.
2- The document is loaded and decrypted using owner pwd.
3- permissions.isOwnerPermission() is true which is correct
4- permissions.canModify() is true which is correct
5- modify the doc and save throws a NPE which is NOT correct

Second test
1- input is a doc encrypted with owner pwd having the modify permission on.
2- The document is loaded but not decrypted
3- permissions.isOwnerPermission() is true, why? I didn't provide any owner pwd I should not have owner permissions.
4- permissions.canModify() is true which is correct
5- modify the doc and save throws a NPE which is NOT correct

Third test
1- input is a doc encrypted with owner pwd having NO permission.
2- The document is loaded and decrypted using owner pwd.
3- permissions.isOwnerPermission() is true which is correct
4- permissions.canModify() is true, why? I can modify the doc because I have owner permission but the Modify should be off.
5- modify the doc and save throws a NPE which is NOT correct

Issue Links

• relates to: PDFBOX-2729 Can't sign encrypted PDF files