Re: [libreoffice-users] Re: Encrypted MSO files (docx,xlsx) in Libo

On 2011-09-09, krisb wrote:

> @Tom: 
> By encrypted file, I mean file secured by build in function in Excel/Word
> 2007 . I know about encryption from message when i try convert to xls the
> test file mentioned in linked thread. I get information that "This document
> is both encrypted and password protected. The Office Open XML Formats
> available in the 2007 release provide stronger encryption ...".

It's still a weird way to describe it. Encryption itself has a
key/password. So this means the document has *two* passwords? One for
non-encrypted password "protection" (it's as much real protection as
ROT26), and other for the encryption?

Or it's just Microsoft that are doing a bad job at describing what's
going on?

> Nuno J. Silva wrote:
> > Microsoft nowadays *claims* to be using open formats, so I'd expect the
> > encryption algorithm to be documented somewhere, and even if it isn't,
> > until some time ago it was pretty clear that math wasn't patenteable.
>
> This sound good, but can we be sure about MS ? :>

We can't. The only way to get rid of the issue is to step away from MS,
but if you could do that you wouldn't be trying to get working OOXML
encryption...

> Nuno J. Silva wrote:
> > I wonder if this is related to your issue. Or wait, are you the
> > reporter?
> > https://bugs.freedesktop.org/show_bug.cgi?id=35422
>
> Yep, I reported it some time ago. Now I know that it should be in a
> different order :)

So it also affects docx? I'd suggest updating the bug report summary to
reflect that :-)

If you can make an example document, attach it to the report. I guess
the only way to create one is using Microsoft Office itself?

-- 
Nuno J. Silva (aka njsg)
gopher://sdf-eu.org/1/users/njsg

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