On 26/10/2012 17:03, Leonard Rosenthol wrote:
There is a LOT of mixing of terms and technologies in this thread.
Let me see if I can clear a few things up.
1 -- XFA forms come in both dynamic and static flavors.
Dynamic have ZERO AcroForms (or any other PDF content -- it's just
XML), while Static XFA uses the standard PDF and AcroForm technology
for the page content and XML for the data model.
2 -- There are (at least) three types of signatures that a PDF file
can contain -- Certifying, Approval and Data.
Certifying and Approval are both based on the use of AcroForm Widgets
and therefore only work on standard PDFs and static XFA. These sign
the entire PDF and are fully supported by iText in either classic CMS
or PAdES/CAdES mode.
Data signatures, however, only sign a portion of the XML data and
therefore only work with Dynamic XFA. They are based on either XML
DigSig or XAdES. This is not supported by iText.
That help?
That's an excellent summary!
I'll add this in one of the next versions of the white paper.
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