Marco,

Marco Barbi (SATA) wrote
> I tried with a very simple PDF (see attachment), with just an AcroForm
> signature field and no XFA based data, but the problem persists.
> I wrote the signer code and I agree that the verifier isn't the problem,
> but I still cannot understand why iText gives a result where Adobe Reader
> fails.

Acrobat upon verification states that it expected some dict object. German
version here:

   Fehler bei Unterschriftsprüfung.  

   Acrobat-Fehler
   Dict-Objekt wurde erwartet.

I didn't spot any none-dictionaries as values of keys which require
dictionaries in the Sig dictionary but maybe the problem is located in some
related object which iText does not inspect (or does not require to be
direct, or ...).

Regards,   Michael.

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