Thank you Leonard for your quick answer.
I will have to review my requirements.
Regards
2009/1/8 Leonard Rosenthol <[email protected]>
> So what you want to do isn't possible with PDF – using iText or anything
> else…
>
>
>
> The first part of your requirements is not a big deal – you can sign any
> data (be it a PDF or other) all you'd like and store off the hash and the
> certs wherever…
>
>
>
> The problem is that for a signed PDF, you can only have a single signature
> over the same byte range/hash BUT you (may) have multiple ones. This type
> of workflow is called a "parallel signature workflow" (as opposed to a
> serial signature workflow) and isn't supported by PDF.
>
>
>
> Leonard
>
>
>
> *From:* Gonçalo Almeida [mailto:[email protected]]
> *Sent:* Thursday, January 08, 2009 6:45 AM
> *To:* [email protected]
> *Subject:* [iText-questions] PDF Digital Signature - PKCS#7
>
>
>
> Hello all
>
> I have a question that I couldn't manage to find in all the foruns I
> searched.
>
> What I want to do is to digitally sign a certain PDF (i.e. with a
> smartcard) and store the signature bytes and user certificate in a separete
> place (for instance in the file system).
>
> It will not produce a signed PDF, as I want it to remain intact.
>
> So, my idea was to allow users to digitally sign that document over and
> over again and in the end gather all signatures ans certificates and produce
> a signed PDF.
>
> Is this possible with iText? If so, is there a snippet code that can use?
>
> Thank you in advance for your answers.
>
>
> --
> Best Regards,
> Gonçalo Almeida
>
>
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--
Cumprimentos,
Gonçalo Almeida
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