Re: Export locking sheet to Excel

[Klokan Petr Přidal <klokan klokan cz>]

Hi,

I tried to wrote patch for export/import of protected 
worksheets/workbook of Excel - attached to Bug 330129
http://bugzilla.gnome.org/show_bug.cgi?id=330129

And I discovered that protection of sheets is not implemented even in 
native file-format .gnumeric. So I did it too, I hope it's clean 
solution: attached to Bug 334257 
http://bugzilla.gnome.org/show_bug.cgi?id=334257

Please check that patches carefully, I'm still beginner and there could 
be some new bugs inside.

What is not implemented is storing of password. Any idea?

(It's not strong security password, just for protect a bit more 
accidental modification. Different stronger implementation should be 
used in the future for open-only-if-you-know-password files).

Excel has hash function which is described in 5.18.4 in 
http://sc.openoffice.org/excelfileformat.pdf

Klokan