[PDFBOX-4413] Add support for AES256 encryption for public key

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.0.13
• Fix Version/s: 2.0.14, 3.0.0 PDFBox
• Component/s: Crypto
• Labels: AES256
• Assignee: Tilman Hausherr
• Reporter: Tilman Hausherr
• Created: 21/Dec/18 13:22
• Updated: 19/Mar/19 20:09
• Resolved: 03/Jan/19 16:55

Description

Adobe 9 added support for AES 256 encryption. This should also be implemented for public key encryption, currently it is only implemented for symmetric key encryption.

Further information is available at http://www.adobe.com/content/dam/Adobe/en/devnet/acrobat/pdfs/adobe_supplement_iso32000.pdf.

I suspect that much of it is already available in the base class, but PublicKeySecurityHandler.prepareDocumentForEncryption() is definitively old stuff.

Issue Links

• relates to: PDFBOX-1594 Add support for AES256 Encryption