It can't be done. Currently iText lacks the permission granularity
needed to control it.
Paulo
> -----Original Message-----
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On
> Behalf Of Seung Hyun Park
> Sent: Saturday, September 15, 2007 11:53 PM
> To: [email protected]
> Subject: [iText-questions] How to sign the PDF file that has
> the signingpermission without setting owner password
>
> Hello.
>
>
>
> I have a question about the signing of PDF with iText.
>
>
>
> I know that PDF encryption spec. provides the permission to
> allow signing and adding annotations.
>
>
>
> I can sign a PDF file using Acrobat without typing owner
> password if it has the permission to allow signing.
>
>
>
>
>
> But, iText always needed owner password to sign on the PDF
> files, although they already had the signing permission, when
> I made some test codes and tried them.
>
>
>
> To be specific, PDFReader can read the PDF files encrypted
> without setting owner password but error occurs at
> PdfStamper.CreateSignature method.
>
>
>
> If I set owner password at the constructor of PDF reader, the
> error disappears.
>
>
>
> But, I have to insert signature without owner password at my
> scenario.
>
>
>
>
>
> My test codes are based on the article - "How to sign a PDF
> using iText and iTextSharp" and work well with unencrypted PDF files.
>
>
>
>
>
>
> How do I sign on the PDF files that they are encrypted but
> have signing permission?
>
>
>
> Strictly speaking, I want to know that it is possible to sign
> them with iText.
>
>
>
>
>
> I attach the sample PDF file that I have used for testing.
>
>
>
>
>
>
> If you could take a few minutes to answer my questions, I
> would really appreciate it.
>
> Always thank you in advance for your help.
>
>
> Best regards,
>
> S. H. Park
>
>
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