NO! Everything you need to know is documented in either ISO 32000-1 or the
XFA specification. You just need to read those documents.
Nothing proprietary.
Leonard
From: Mathieu Fortin [mailto:mathieu.for...@notarius.com]
Sent: Monday, January 25, 2010 11:05 PM
To: itext-questions@lists.sourceforge.net
Subject: Re: [iText-questions] Xfa signature
Still unanswered. Is that one of those adobe proprietary feature?
An interesting but maybe unrelated thing is that if we delibarately produces an
error in the xml , adobe reader throws a bunch of xml parsing error BUT the
signature appears( doesn't validate though)
Notarius Inc.
700-1080 Côte du Beaver Hall
Montréal, Québec, H2Z 1S8
Avis de confidentialité / Confidentiality Notice
Notarius Inc. - Certifié ISO 9001 : 2000
Centre de certification du Québec - Certifié ISO 27001 : 2005
________________________________
From: Mathieu Fortin
To: itext-questions@lists.sourceforge.net
Sent: Thu Jan 21 17:52:59 2010
Subject: [iText-questions] Xfa signature
I understand that with xfa docs we can sign the whole pdf or the xml datasets
(in whole or in parts).
We are trying to sign the whole pdf using the same method as static pdf. The
result is a signature extractable by IText, but Adobe Reader doesn't even see
there is a signature in there.
When we sign with acrobat it hads a form element in the xdp along with a
checksum value.
The question is:
- how is this checksum calculated?
- is this checksum even used by reader to discover the signatures?
Mathieu
Notarius Inc.
700-1080 Côte du Beaver Hall
Montréal, Québec, H2Z 1S8
Avis de confidentialité / Confidentiality Notice
Notarius Inc. - Certifié ISO 9001 : 2000
Centre de certification du Québec - Certifié ISO 27001 : 2005
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