Domenico Barile wrote
> I'm trying to sign PDF files that sometime could have attachment.
> 
> I'm using PdfSignatureAppearance.GetRangeStream to get the stream on which
> calculate hash but only the sign of PDFs without attachment is correctly
> verified (it seems that the attachment content was not used to calculate
> hash).

Please provide a sample PDF illustrating the issue and the essential signing
code.

Regards,   Michael



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