fangz, your message from Friday does not seem to have been accepted by the mailing list. Have you already registered with it? (Not with nabble but with [email protected], the mailing list mirrored here. nabble by now informs you quite verbously about that requirement.)
fangz wrote > We are trying to merge multiple signed documents. It worked fine before > because all the signatures were invisible. We simply did: > > page = writer.getImportedPage(pdfReader, pageNo); > cb.addTemplate(page, 0, 0); > > which ignores all signatures in the original documents. After merging, we > sign the document again for security. > > The problem came when we allowed visible signature to the original > document. People use Acrobat Pro to put their personalized signatures on > it. In order to keep the visible signature, we have to use PdfCopy. After > merging and signing, now you see "invalid signature" message when opening > the merged pdf. Since all the signatures are internal, we really don't > need to keep the digital nature of the original signature, but the > signature image and its accompanying text are important. The question is: > Is there a way to extract the original signature as an image but leave the > digital nature out? Yes it is possible. But it is not appropriate to simply copy the signature fields and their contents as you seem to have tried. Obviously these copied signatures being signatures are checked by the Reader and deemed invalid. Instead you have to copy the appearances of the visible signatures and properly reference them from the merged content or some appropriate annotation. To me that looks like some development based on the iText low-level API. Regards, Michael -- View this message in context: http://itext-general.2136553.n4.nabble.com/Merge-multiple-signed-PDF-tp4460020p4465538.html Sent from the iText - General mailing list archive at Nabble.com. ------------------------------------------------------------------------------ Try before you buy = See our experts in action! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-dev2 _______________________________________________ iText-questions mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/itext-questions iText(R) is a registered trademark of 1T3XT BVBA. Many questions posted to this list can (and will) be answered with a reference to the iText book: http://www.itextpdf.com/book/ Please check the keywords list before you ask for examples: http://itextpdf.com/themes/keywords.php
