Kimmo Surakka wrote:
Berend Tober wrote:
Indeed, and I even included in my original post "(Aside from the
obvious -- "Stop using MS-Excel!" -- because that is a failure I
cannot control...)". Kids these days....
Anyway, I've looked at WinPT and GPGee and one other GUI wrapper
around gnupg, but they all of course are victims of this MS Excel
"feature", and furthermore none of them satisfy my other need to be
able to support multiple persons signing any given document, either
(cf. other mailing list message thread "Multiple signatures on a
single file").
Just my two cents worth: isn't it true that most Windows zippers can
open a file "from inside a zip archive", i.e. uncompress it
transparently to a temp directory and open from there? One easy-to-
use solution could therefore be to store the Excel file inside a zip
archive, and then sign that archive? When the second person opens the
spreadsheet, all the changes Excel wants to do are done to the
temporary copy -- not the actual spreadsheet itself.
The sounds like it would work, but I don't like the idea of imposing the
extra layer of the separate zip application like this between the
document and the signing step -- although it could be the approach we
have to take if we bring this to the next level and scan the supporting
documents (i.e., receipts) to jpeg files for inclusion along with the
spread sheet -- which would be pretty cool. However, I still have the
issue being discussed in a separate-but-related thread concerning
co-signatures.
The comand script I'm refining seems to do all that I need, even if it
has some rough edges:
gpg --sign.cmd:
@echo off
if .%1. == .. exit
attrib +r %1
gpg --detach-sign --armor --comment "Signature of %USERNAME%"
--local-user %USERNAME% -o - %1>>%1.asc
along with
gpg --verify.cmd:
@echo off
gpg --verify %1
echo.
pause
to list the co-signators. Lastly, I make short cuts in the Windows "Send
To" folder, putting these two features in the Explorer context menu.
Seems to work o.k.
-- BMT
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