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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - Sign PDF with digital signature"
href="https://bugs.freedesktop.org/show_bug.cgi?id=99416#c45">Comment # 45</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - Sign PDF with digital signature"
href="https://bugs.freedesktop.org/show_bug.cgi?id=99416">bug 99416</a>
from <span class="vcard"><a class="email" href="mailto:huj@froreich-bioscientia.de" title="Hans-Ulrich Jüttner <huj@froreich-bioscientia.de>"> <span class="fn">Hans-Ulrich Jüttner</span></a>
</span></b>
<pre>(In reply to Adrian Johnson from <a href="show_bug.cgi?id=99416#c44">comment #44</a>)
<span class="quote">> (In reply to Albert Astals Cid from <a href="show_bug.cgi?id=99416#c43">comment #43</a>)
> > This is what needs to happen, be it reread or ideally a less extensive
> > operation, but after sign is called, things need to keep returning valid
> > information.
>
> It is probably sufficient to just update the signature and byte offsets in
> the in memory object.</span >
(In reply to Albert Astals Cid from <a href="show_bug.cgi?id=99416#c43">comment #43</a>)
<span class="quote">> (In reply to Adrian Johnson from <a href="show_bug.cgi?id=99416#c42">comment #42</a>)
> > I'm not familiar with the qt5 interface. There a a couple of options:
> > - reread the document after signing so the in memory copy is consistent with
> > the on disk copy
>
> This is what needs to happen, be it reread or ideally a less extensive
> operation, but after sign is called, things need to keep returning valid
> information.
>
> Hans what do you say would be invalid and why?</span >
The in memory ByteRange object contains numbers 9999999999 and generates a
string "/ByteRange [0 9999999999 9999999999 9999999999 ]" if written to disk.
The in memory Contents object contains a string with a signature not calculated
over the byte ranges which should be signed.
<span class="quote">>
> > - document the signing as a "save a copy" operation. ie the saved copy will
> > be different to the in memory copy. And fix the code so the in memory copy
> > is not changed.
>
> This doesn't make sense, remember you're not "signing the document", but
> signining an anotation of the document, so this is not even a function on
> the document level, but at the annotation level.</span ></pre>
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