WinPT/gpg sur une disquette ou clé USB

Pour ceux que ça intéresse, j'ai trouvé un moyen d'utiliser WinPT sans avoir à les installer au préalable.

(WinPT est une interface graphique à GPG, le logiciel de cryptographie. L'utilisation de gpg (et WinPT) est légale en France.)

ça permet de mettre WinPT+gpg+votre keyring sur une disquette ou une clé USB et de les utiliser directement.

Autre avantage: cela vous permet de (dé)chiffrer des messages sans avoir à écrire votre clé sur disque dur.


La notice est en anglais.
Si vous avez des suggestions, je suis à l'écoute !
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Creating a nomad WinPT.

Abstract: WinPT is a Windows GUI front-end for GnuPG.
          WinPT and GnuPG rely on registry settings and can only be used after
          beeing installed. You cannot run them from a floppy or an USB key.

Solution: This guide will help you to create a "no-install" version of WinPT.
          You will be able to run WinPT directly off a floppy disk or a USB key.

You will be able to use WinPT+gpg+your keyring without:
  - having to install WinPT + gpg on harddisk.
  - having to write your keyring on the harddisk.
  - having to manually create/update WinPT and GnuPG registry settings

This does _not_ involve recompiling or tweaking WinPT nor GPG.

Required tools:
  - GnuPG   : encryption program
  - WinPT   : Shell to GnuPG
  - AutoIt  : Windows scripting
  - UPX     : Executable compressor.

Instructions:

1) Create an empty directory.

2) In this directory, create the file nomad_winpt.au3 with a text editor:
-----------cut here %-------------
RegWrite("HKEY_CURRENT_USER\Software\GNU\GnuPG", "HomeDir", "REG_SZ", @ScriptDir & "\keyring")
RegWrite("HKEY_CURRENT_USER\Software\GNU\GnuPG", "gpgProgram", "REG_SZ", @ScriptDir & "\GnuPG\gpg.exe")
RegWrite("HKEY_CURRENT_USER\Software\GNU\GnuPG", "OptFile", "REG_SZ", @ScriptDir & "\GnuPG\gpg.conf")
RegWrite("HKEY_CURRENT_USER\Software\WinPT", "Extensions", "REG_SZ", "1")
RegWrite("HKEY_CURRENT_USER\Software\WinPT\Keyserver", "Default", "REG_SZ", "http://wwwkeys.nl.pgp.net")
$val = RunWait(@ScriptDir & "\WinPT\winpt.exe", @ScriptDir & "\WinPT")
RegDelete("HKEY_CURRENT_USER\Software\GNU\GnuPG")
RegDelete("HKEY_CURRENT_USER\Software\WinPT")
Exit
-----------cut here %-------------

2) Download latest winpt-X.X.X-exe.zip
   from http://sourceforge.net/project/showfiles.php?group_id=71360
   and unzip to the \winpt subdirectory.

3) Download latest gnupg-w32cli-X.X.X.zip
   from ftp://ftp.gnupg.org/gcrypt/binary/
   and unzip to the \gnupg subdirectory.
   (You can get rid of *.mo files)

4) Create an empty gpg.conf file in the \gnupg subdirectory

5) Create the \keyring subdirectory.
   If you have an existing keyring, put it here
   (otherwise WinPT will prompt you to create one.)

6) Download AutoIt v3 from http://www.autoitscript.com/autoit3/
   and install it.

7) With AutoIt, compile the script nomad_winpt.au3 into nomad_winpt.exe
   (Right-click on the script, choose "Compile Script"
    or use the Script Compiler in the AutoIt menu.)
   You can delete the nomad_winpt.au3 file.

8) Download latest upxXXXw.zip
   from http://sourceforge.net/project/showfiles.php?group_id=2331

9) In the \gnupg subdirectory, run: upx --best *.exe
   In the \winpt subdirectory, run: upx --best *.exe

10) You should have now:
       \winpt    (containing WinPT binaries)
       \gpg      (containing GnuPG binaries)
       \keyring  (empty directory ; will contain your keyring)
       nomad_winpt.exe

That's all.
The whole thing is slightly above 1 Mb, which fits on a floppy.

Run nomad_winpt.exe
You will see AutoIt and WinPT icons in tray.
If you do not have a keyring, WinPT will prompt you to create one.
Note that once you close WinPT, the registry setting will automatically be cleared
and the AutoIt script will exit.


Note:
GnuPG settings changed from WinPT GUI will be saved to gpg.conf
WinPT settings changed from WinPT GUI will be discarded. You have to add them
to the nomad_winpt.au3 script.

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