Gentlemen, You are addressing the exact problem I need to solve, almost. My case has one difference.
I have a PDF Acroform that I created with my licensed copy of Adobe Acrobat Pro ver 8. I am the author of the PDF form and need to set the password security and enable user rights. My (C# iTextSharp) application software needs to open the PDF form, read field content, and write output to ascii files. It works properly with security of 'no password' or 'password' protected (without enabled user rights). My code fails when I attempt to open the PDF if it is both 'password' protected and has user rights enabled. I have two questions: 1. Is it possible and legal for me to sucessfully open and read content from the 'password' protected, rights enabled PDF form with iTextSharp? 2. What is the simplest C# code snippet to perform this process. Sincerely Kent Smith Systems Engineer Bruno Lowagie (iText) wrote: > > Gilberto Fres wrote: >> I create a form with the usage right for Acrobat Reader enabled. > > Thus you decide that you will stick with Adobe products, > and not use any other product, as Adobe has the monopoly > on Reader Enabled documents. > >> I test the form using the Acrobat reader and work fine. > > I can save and export the data ok. > > Yes, but Adobe is the only company that may use the key > needed to encrypt a hash of the document to make reader > enabling possible. > >> But I want to fill out some of the form field using itext >> and the user should fill the rest of fields. > > The user will be able to do that, but the document will > no longer be reader enabled. > >> Itext filled the fields ok, but when I open the form using the Acrobat >> Reader for the user finish fill out the rest of fields, I got the >> following message: >> "This document contained certain rights to enable special features >> in Adobe Reader. The document had been changed since it was created and >> these rights are no longer valid. Please contact the author for the >> original version of this document." > > A hash of the original document was encrypted using the > key ONLY ADOBE may use, then you changed the document. > Adobe Reader notices this change and says: hey, this > document is no longer reader enabled. > >> I don’t know if someone brought this issue before. > > Yes, plenty of times. > >> My question is What I can do to avoid this problem? > > Nothing. It's more a legal issue, than it is a technical issue. > br, > Bruno > > ------------------------------------------------------------------------- > Take Surveys. Earn Cash. Influence the Future of IT > Join SourceForge.net's Techsay panel and you'll get the chance to share > your > opinions on IT & business topics through brief surveys - and earn cash > http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV > _______________________________________________ > iText-questions mailing list > iText-questions@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/itext-questions > Buy the iText book: http://itext.ugent.be/itext-in-action/ > > -- View this message in context: http://www.nabble.com/Usage-Right-For-Acrobat-Reader-Problem-tf3117194.html#a9325960 Sent from the iText - General mailing list archive at Nabble.com. ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys-and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ iText-questions mailing list iText-questions@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/itext-questions Buy the iText book: http://itext.ugent.be/itext-in-action/
