[PDFBOX-3065] Right now PDFBOX does not permit to sign multiple files while calling an external signing service.

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.8.10
• Fix Version/s: 2.0.3, 3.0.0 PDFBox
• Component/s: Signing
• Labels: features
• Environment: Any Operating systems.
• Flags: Important
• Assignee: Tilman Hausherr
• Reporter: Andrea Paternesi
• Created: 27/Oct/15 10:54
• Updated: 25/Mar/17 18:12
• Resolved: 11/Sep/16 12:48

Description

Since to sign a PDF you forced the implementation of the SignatureInterface interface, is not possible to prepare N hashes from N PDF files and then send them to a signing service that accepts multiple hashes with a single signon.
For example if I use an OTP signing service.

What would be nice to have is to separate the hash calculation from the signing.

Instead to implement the Interface I would like to have something like this:

1) calculate hash from document with the new signature dictionary bytes
2) sign the hash
3) insert the signature into pdf

This way I could achieve to sign for example 100 pdf files calling the service once.
Right now must ask the user to sign in 100 times.

Thanks in advance.
Andrea.