Planet PDF Forum Archive

Planet PDF ForumWowsers! This is page is old, head to the LIVE Planet PDF Forum. It features more than 10 conferences, covering everything from beginner to in-depth developer and pre-press discussions. If you wish to continue... one & two archive covers 1999-2011 (160,000 pages).

New Forum | Previous | Next | (P-PDF) Developers

Topic: Signing a PDF Programatically
Conf: (P-PDF) Developers, Msg: 87726
From: pmhesse
Date: 5/15/2003 12:13 AM

I've got a custom digital signature plug-in based upon the SignDoc sample that seems to be working OK. I've exposed a COM interface to verify the signature on a document, and that is working great. I'm now trying to expose a COM call for signing the document programmatically. This will work if the signature field already exists in the specified file. The file and field name are passed in to the call. Unfortunately I'm having a bit of a problem.

Inside the plug-in, when a user clicks to perform a signature, the Acrobat interface marshalls the calls to my different handlers. Specifically, the call to DSCommitSign handler passes in the offset and length of where the /Contents and /ByteRange objects are in the file. The digital signature is then generated based upon the contents of the file, not counting this range.

Is there a way I can find the offset and length of the /Contents and /ByteRange objects so that I can work around this? Or is there a better way for getting my plug-in to sign the document without requiring a user to click through the signature dialogs?



PDF In-Depth Free Product Trials Ubiquitous PDF

Debenu Aerialist

The ultimate plug-in for Adobe Acrobat. Advanced splitting, merging, stamping, bookmarking, and link...

Download free demo

Debenu PDF Tools Pro

It's simple to use and will let you preview and edit PDF files, it's a Windows application that makes...

Download free demo

Five visions of a PDF Day

In the world of PDFs or as we like to say Planet (of) PDF, a year isn't a real PDF year without an intense few days of industry knowledge sharing.

May 15, 2018
Platinum Sponsor

Search Planet PDF
more searching options...
Planet PDF Newsletter
Most Popular Articles
Featured Product

Debenu PDF Aerialist

The ultimate plug-in for Adobe Acrobat. Advanced splitting, merging, stamping, bookmarking, and link control. Take Acrobat to the next level.


Adding a PDF Stamp Comment

OK, so you want to stamp your document. Maybe you need to give reviewers some advice about the document's status or sensitivity. This tip from author Ted Padova demonstrates how to add stamps with the Stamp Tool along with related comments.