You have modified the original document, thus it's signature is no longer valid (trustable).
Leonard On 5/17/13 10:46 AM, "Paulo Soares" <pgpsoa...@gmail.com> wrote: >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 ------------------------------------------------------------------------------ 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
