[PDFBOX-1468] Decrypting unencrypted strings

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.7.1
• Fix Version/s: 1.8.0
• Component/s: PDModel
• Labels: decrypt encryption
• Assignee: Andreas Lehmkühler
• Reporter: Juraj Lonc
• Created: 13/Dec/12 14:30
• Updated: 23/Mar/13 12:56
• Resolved: 17/Dec/12 18:02

Description

I have received encrypted PDF which contains several string objects but not all of them are encrypted.
I am not sure whether it is or it is not compliant with pdf reference.

But I have created fix so pdfbox can handle this.
If string contains only chars between 32-127 then decryption is not necessary (I know, this is not true in 100% of cases but I think it is swallowable)

Some strings are encrypted:
/CreationDate(\222\202\376k\003\372\306\236(IP\327C\215\375k\357)
/ModDate(\222\202\376k\003\372\306\236(IP\327C\215\375k\357)
/Producer(\241\350\210\035\001\352\224\3219(0\247\006\333\2537\225\334\300\232\265)

Some are not:
/Registry(Adobe)
/Ordering(Identity)