TotalJJ, totaljj wrote > To put the token date, I need to know the location of the layer and put it > into the ByteRange. > > Then I can exclude the layer for time stamping and set the token date on > the layer after receiving token. > > There is a exclusions variable in PdfSignatureAppearance class like below. > > exclusionLocations.put(PdfName.BYTERANGE, lit); > > But the layer is written after all the exclusionLocations is put. > > I am going to change the itext source. > > Any help would be appreciated.
I would strongly advise against excluding anything but the signature container from the signed ranges. While arbitrary byte ranges are allowed by ISO 32000-1, the PAdES style signatures explicitly require that "the ByteRange shall cover the entire file, including the signature dictionary but excluding the PDF Signature itself" (and this restriction will also be respected in ISO 32000-2). Additionally Adobe Acrobat and Reader have been rejecting byte ranges covering less data for quite some time now. Furthermore many PDF signature verification programs expect the byte ranges array to contain exactly 4 values, i.e. only one gap. Regards, Michael -- View this message in context: http://itext-general.2136553.n4.nabble.com/How-to-put-TimeStampToken-Date-on-SignatureAppearnace-tp4656068p4656071.html Sent from the iText - General mailing list archive at Nabble.com. ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ iText-questions mailing list iText-questions@lists.sourceforge.net 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
