The first signature is not invalidated, it's just Acrobat 's way of saying it's not the last. I think Acrobat started behaving like this in 8. If you extract the first revision it will still verify ok.
Paulo On Fri, May 17, 2013 at 8:26 AM, twain <ant.mari...@gmail.com> wrote: > Hi all, > > I have a problem about signing a signed pdf. > > - starting from a valid signed pdf. Signature covers whole document. > - sign this pdf applying an image on a text field(there is a reason to do > this). The signature is applied on a signature field > - when I open the signed pdf I find that the second signature is correct but > the first one is no more valid > > Because I add an image, changing the content covered by the first signature. > Sure. But I used > > PdfStamper pdfStamper = PdfStamper.createSignature(pdfReader, baos, '\0', > null, true); > > where the last flag to true should mean > > "if true the signature and all the other content will be added as a new > revision thus not invalidating existing signatures" > > So the expected result was a new revision carrying an image and a signature > without invalidating the first signature. > > Is there something wrong with my considerations? > > Thank you very much > > > > > -- > View this message in context: > http://itext-general.2136553.n4.nabble.com/New-revision-issues-tp4658282.html > Sent from the iText - General mailing list archive at Nabble.com. > > ------------------------------------------------------------------------------ > AlienVault Unified Security Management (USM) platform delivers complete > security visibility with the essential security capabilities. Easily and > efficiently configure, manage, and operate all of your security controls > from a single console and one unified framework. Download a free trial. > http://p.sf.net/sfu/alienvault_d2d > _______________________________________________ > 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 ------------------------------------------------------------------------------ AlienVault Unified Security Management (USM) platform delivers complete security visibility with the essential security capabilities. Easily and efficiently configure, manage, and operate all of your security controls from a single console and one unified framework. Download a free trial. http://p.sf.net/sfu/alienvault_d2d _______________________________________________ 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
