Hello gentlemen, I know this topic is an old one but I encounter the same trouble computing this checksum in the xml.
What I am trying to do is to fill an empty signature field of a "dynamic XML" pdf. This pdf is very basic and contains only 1 empty signature field. Once I've filled the signature field, I am updating the node "form" of the XML with this : <form xmlns="http://www.xfa.org/schema/xfa-form/2.8/"; checksum="OI0a7q2Hu8kYSJ6C19+SSW2F9XI="> <subform name="formulaire1"> <instanceManager name="_"/> <subform> <field name="Signature1" access="readOnly"/> </subform> <pageSet> <pageArea name="Page1"/> </pageSet> </subform> </form> For test purpose, I've hard-coded the checksum (as you did) and I can see that my PDF file is valid through Acrobat Reader. I am trying to get an explanation for the checksum calculation but for the time being, I did not find anything (looking for in the PDF32000_2008.pdf and xfa_spec_3_1.pdf documentation). Could you please help me with this one? Thank you very much in advance, Emmanuel -- View this message in context: http://itext-general.2136553.n4.nabble.com/Xfa-signature-tp2172306p3659473.html Sent from the iText - General mailing list archive at Nabble.com. ------------------------------------------------------------------------------ All of the data generated in your IT infrastructure is seriously valuable. Why? It contains a definitive record of application performance, security threats, fraudulent activity, and more. Splunk takes this data and makes sense of it. IT sense. And common sense. http://p.sf.net/sfu/splunk-d2d-c2 _______________________________________________ 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
