Path: news.vol.it!news
From: marco.coletti@eurofin.it (Marco Coletti)
Newsgroups: alt.security.pgp
Subject: Re: Win95 long file names
Date: Thu, 02 Jan 1997 23:41:18 GMT
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BlackGate@compuserve.com## (Brandon Blackmoor) wrote:

>One of the things that annoys me about Win95 is that any old
>programs will overwrite long file names with short ones. This
>happens with PGP, too. I've been working on batch files (using a
>program called Visual DialogScript) that get the long file name,
>do a PGP thing (so far, just conventionally encrypt & decrypt),
>then copy the long file name back onto the resulting file.
>
>For example, it goes like this for encrypting:
>This is a test.doc  <-- plaintext file
>THISISAT.PGP        <-- resulting encrypted file
>This is a test.doc  <-- encrypted file is renamed 


Never heard of PGP 32-bit ?

It runs on win32 (text mode only) and supports long file names.

Basically it is a recompilation of the source code of PGP 2.6.3i for DOS.

ftp://ftp.ifi.uio.no/pub/pgp/pc/windows/pgp263i-win32.zip

Maybe its use is not legal inside USA.


I installed PGP-32 simply by unpacking the zip file, renaming PGP.EXE to
PGP32.EXE and moving the file PGP32.EXE to my preexisting PGP home dir (so that
PGP and PGP-32 can share the private and public key ring).

You can even build a basic Explorer support for PGP by means of PGP-32 and
something like the following registry keys (taken from my win95 registry):

........................................................................
REGEDIT4

[HKEY_CLASSES_ROOT\*\shell]

[HKEY_CLASSES_ROOT\*\shell\PGP_decrypt]
@="PGP decrypt"

[HKEY_CLASSES_ROOT\*\shell\PGP_decrypt\command]
@="d:\\prg\\pgp\\pgp32.exe -p \"%L\""

[HKEY_CLASSES_ROOT\*\shell\PGP_encrypt]
@="PGP sign and encrypt"

[HKEY_CLASSES_ROOT\*\shell\PGP_encrypt\command]
@="d:\\prg\\pgp\\pgp32.exe -es \"%L\" -o \"%L.pgp\""

[HKEY_CLASSES_ROOT\.pgp]
@="PGPfile"

[HKEY_CLASSES_ROOT\PGPfile]
@="Pretty Good Privacy"
"EditFlags"=hex:00,00,00,00

[HKEY_CLASSES_ROOT\PGPfile\shell]
@="open"

[HKEY_CLASSES_ROOT\PGPfile\shell\open]
"EditFlags"=hex:01,00,00,00

[HKEY_CLASSES_ROOT\PGPfile\shell\open\command]
@="d:\\prg\\pgp\\pgp32.exe -p \"%L\""

[HKEY_CLASSES_ROOT\PGPfile\DefaultIcon]
@="C:\\WINDOWS\\SYSTEM\\PASSWORD.CPL,1"
........................................................................

You should substitute d:\\prg\\pgp\\pgp32.exe for your PGP-32 full pathname and
C:\\WINDOWS for your win95 home dir.
Then save as a file with extension .REG and double click it.
Now look at the right-click menu in Explorer... and guess what happens if you
double-click a .PGP file?


If you like to keep the same filename for the encrypted file (rather than
appending the extension .PGP) change the rows

[HKEY_CLASSES_ROOT\*\shell\PGP_encrypt\command]
@="d:\\prg\\pgp\\pgp32.exe -es \"%L\" -o \"%L.pgp\""

in

[HKEY_CLASSES_ROOT\*\shell\PGP_encrypt\command]
@="d:\\prg\\pgp\\pgp32.exe -es \"%L\" -o \"%L\""

Even so, you can decrypt a file wich extension is not .PGP right-clicking it
and choosing the "PGP decrypt" menu item, but I feel more correct the schema:

long file name.doc --(encryption)--> long file name.doc.pgp --(decryption by
double-click)--> long file name.doc


Another idea would be to add the -w parameter to improve security:

[HKEY_CLASSES_ROOT\*\shell\PGP_encrypt\command]
@="d:\\prg\\pgp\\pgp32.exe -esw \"%L\" -o \"%L.pgp\""


And finally, something for protecting sensitive files against non authorized
scrutiny:

[HKEY_CLASSES_ROOT\*\shell\PGP_lock]
@="PGP lock"

[HKEY_CLASSES_ROOT\*\shell\PGP_lock\command]
@="d:\\prg\\pgp\\pgp32.exe -ew \"%L\" marco.coletti@eurofin.it -o \"%L.pgp\""


The power of Explorer...


---------------------------------------------------------- -= MarCo =-
PGP public key:
finger marco.coletti@mail.bearnet.it
http://www.pgp.net/cgi-bin/pks-extract-key.pl?op=get&search=0x96A79061

Fingerprint: 9F E5 80 61 F6 9F 05 2D  EA 53 6F 2D 82 8B C7 C2
----------------------------------------------------------------------