Re: [SPAM] Re: Encrypting signed pdf file

Hi, I have a problem that can maybe relate to this one.

I'm signing the file client-side and after I'm uploading it to S3, but when
I download the file the signature becomes invalid.

I was wondering if the HTTPS transport in between the client and the S3
end-point might be corrupting the signature.

Thanks


2014-08-27 10:32 GMT-03:00 mkl <[email protected]>:

> Metho,
>
> metho wrote
> > Currently we store signed pdf in our database and need to sent encrypted
> > version over the net, but encrypting it using PDFReader  and PdfStamper
> > seems to break certificates existing(adobe reader says they are not
> > valid).
> > Is there some workaround for that?
>
> You automatically break existing signatures whenever you encrypt a
> document.
> Signatures sign byte ranges in the file, and these file ranges are
> relocated
> and also otherwise changed upon encryption.
>
> > I also tried to sign those pdfs again during encryption but i end with
> pdf
> > with 2 certificates. The new one which is valid and old one which is
> > broken(maybe there is some way to delete this one?)
>
> You can delete the original one completely or you can reuse its visual
> representation for a new one.
>
> Regards, Mikel
>
>
>
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-- 
Paulo Melo
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iText(R) is a registered trademark of 1T3XT BVBA.
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