Hello all, I've been researching this for the past few days and haven't been able to expose what the issue is. I'm trying to clear the values on a single digital signature field in a pdf using itextsharp. I've stumbled upon this thread (which appears wasn't completely answered and is now dead):
http://osdir.com/ml/windows.dotnet.itextsharp.general/2008-07/msg00112.html Clearing Digital Signature Field I've attempted to recreate the code that is in this thread but just as the thread starter has said, it does not accomplish what Paulo has suggested. I'm already aware that the removal of a digital signature field's values may invalidate the other digital signatures on the pdf. However, this task should be a fairly easy thing to accomplish given the depth of the itext/itextsharp library but I haven't been able to figure out exactly how to do it. After walking through the code on that thread I've been able to surmise that the widgets and merged values are probably not neccessarily required to be cleared in order to wipe the digital signature's actual values. I.E. : //Not needed? PdfDictionary sig = (PdfDictionary)itm.widgets[0]; sig.Remove(PdfName.V); sig.Remove(PdfName.AP); //Needed but does not change signature? sig = (PdfDictionary)itm.values[0]; sig.Remove(PdfName.V); sig.Remove(PdfName.AP); //Not needed? sig = (PdfDictionary)itm.merged[0]; sig.Remove(PdfName.V); sig.Remove(PdfName.AP); Any ideas? Thanks! -- View this message in context: http://itext-general.2136553.n4.nabble.com/Clearing-a-Digital-Signature-Field-s-value-tp2966934p2966934.html Sent from the iText - General mailing list archive at Nabble.com. ------------------------------------------------------------------------------ Beautiful is writing same markup. Internet Explorer 9 supports standards for HTML5, CSS3, SVG 1.1, ECMAScript5, and DOM L2 & L3. Spend less time writing and rewriting code and more time creating great experiences on the web. Be a part of the beta today. http://p.sf.net/sfu/beautyoftheweb _______________________________________________ iText-questions mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/itext-questions 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
