Christian, Christian Fritschka wrote > I have a PDF which is signed with a timestamp. When I try to verify the > signature I get the message that this signature is not valid. Especially > when I try to read the signatures date - it's null.
iText does not yet fully support PAdES part 4 document time stamps, it generates them but cannot verify them: It finds them but treats them as regular CMS style document signatures. As RFC 3161 style time stamps are very much like CMS signatures this works to a certain degree. But as both the document hash and the time reference are coded in different fields in these styles, the hash value verification fails and the time stamp time cannot be read. If I understood his posts correctly, Paulo started working on PAdES document time stamp verification late December. As long as this kind of verification is not explicitly requested by some paying client, though, it surely is not a high priority project. Regards, Michael -- View this message in context: http://itext-general.2136553.n4.nabble.com/want-to-verify-a-pdf-signed-by-timestamp-tp4327813p4333631.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 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
