Re: [SPAM] Re: Encrypting signed pdf file

Yeah, I get it, it shouldn't alter the signature.

I did some more testing and it got worse: it seems to be random. Some files
the signature got corrupted, others didn't.

I will try to compare both files at the binary level and see what I can get
from it, and then I'll try to get in touch with Amazon S3 Support, as this
seems unrelated to iText.

Thanks for the help though.



2014-09-04 2:46 GMT-03:00 iText mailing list <[email protected]>:

> On 9/3/2014 9:27 PM, Paulo Melo wrote:
> > 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.
>
> That would surprise me.
>
> See it as an envelope: HTTPS puts the signed file in an envelope without
> changing the files. When the envelope is received the original file is
> taken from the envelope. Normally, no bytes are changed in the process.
>
> In your case, bytes were changed (otherwise the signature wouldn't be
> invalid). Compare both files on the byte level and you may get one step
> closer to diagnose what changed those bytes.
>
>
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-- 
Paulo Melo
Equipe Clip

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iText(R) is a registered trademark of 1T3XT BVBA.
Many questions posted to this list can (and will) be answered with a reference to the iText book: http://www.itextpdf.com/book/
Please check the keywords list before you ask for examples: http://itextpdf.com/themes/keywords.php