[libreoffice-users] Re: Digital signing MS format documents

Le 13/09/11 09:46, draganb a écrit :

Hi Dragan,

> Hi all,
> we started using LibreOffice as an alternative to MS Office in our
> organization, on some of the computers. It all started well, but we've hit a
> wall with digital signing. As I understand, the document must be in
> OpenDocument format for the signing to work. The problem is that we will not
> be able to use the LibreOffice native format in the near future and we are
> stuck with the MS formats for which the signing doesn't work.
>
> Is there any way around this? Or maybe I should post this as a feature
> request?

The problem with digitally signing someone else's document format is
that one has to know at what level the signature intervenes, i.e. is
this MSOffice specification fully documented ? If it isn't, then

1) it would probably be a fairly significant task to attempt to reverse
engineer the job so that it works with the docx/xlsx export filters ; and

2) it may not even be legal to do so under the terms of the DMCA without
approval from Microsoft.

As I know nothing about the specification for managing and implementing
digital signatures into docx/xlsx documents, I really don't know.

When you open your feature request bug report, it would be a good idea
if you could find documentation pointing to the implementation details,
since that would give any potentially interested developer a headstart.



Alex


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