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Old 09-27-2010, 05:28 PM
"Maxime Alarie"
 
Default SUSPECT: File decryption

I use bcrypt. It's a command line encryption tool. You simply have to
type: bcrypt $FILE and enter the pass-phrase. Works the same way with
direcotries.


More Info: http://bcrypt.sourceforge.net/



-----Original Message-----
From: ubuntu-users-bounces@lists.ubuntu.com
[mailto:ubuntu-users-bounces@lists.ubuntu.com] On Behalf Of David
Fletcher
Sent: 27 September 2010 11:39
To: Ubuntu user technical support,not for general discussions
Subject: SUSPECT: Re: File decryption

On Mon, 2010-09-27 at 10:19 +0200, Michael Kadzioch wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
>
>
> Am 27.09.2010 10:07, schrieb David Fletcher:
> > Here's something I wanted to do last night - get Gnome to decrypt a
file.
> >
> > With KDE I just install kgpg and from then on I can right-click on a
file and
> > either encrypt or decrypt it. How do I do this in Ubuntu Lucid?
Google has
> > not revealed any answer to me.
> >
> > Dave
> >
>
>
> Try encfs and cryptkeeper (gui for encfs). It works fine on mx
desktop!
>

I tried it but it looks like it's meant to work with directories not
individual files.

Surely this can't be difficult?

Dave



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Old 09-28-2010, 01:45 PM
"Maxime Alarie"
 
Default SUSPECT: File decryption

-----Original Message-----
From: ubuntu-users-bounces@lists.ubuntu.com
[mailto:ubuntu-users-bounces@lists.ubuntu.com] On Behalf Of David
Fletcher
Sent: 28 September 2010 05:04
To: ubuntu-users@lists.ubuntu.com
Subject: SUSPECT: Re: File decryption

On Monday 27 Sep 2010, NoOp wrote:
> $ sudo apt-get install seahorse-plugins
> $ nautilus -q
> $ nautilius &
>
> Right click on a file and you should now see the 'encrypt/decrypt' in
> the menu. Nautilus uses seahorse (Applications|Accessories|'Password
and
> Encryption Keys').
> https://help.ubuntu.com/community/GnuPrivacyGuardHowto
>
As I said last night, that now appears to be working.

The odd thing is, that the encrypted file is a .tar.gz.asc which was
copied
from a USB flash drive. Decrypting it results in a .tar.gz file. When I
apply

tar -xvf filename.tar.gz

to this file on the system I'm playing with tar gives me error messages
-
can't remember exactly what they were. It's an old system that was given
to
me with a 20GB ATA drive and ME installed on it. I replaced the
motherboard
with a fanless Via mini-ITX unit that was reliably running 24/7 in a
server
before I upgraded it a few weeks ago. The main reason for replacing the
motherboard is that it has more memory than the original.

When I take the same decrypted tar.gz file back to my desktop machine on
a
flash drive and again run tar -xvf on it, it unpacks without errors.

Is there any chance the errors could be caused by the ancient hard
drive? I've
also got the 80GB SATA hard drive that was running in the server with
the Via
board. I might try putting that in the old machine and doing another
install
but I've got other things that I really ought to be progressing right
now.

I guess I should also try the tar operation with my laptop.

This sort of thing worries me a little, because that tar file is my
backup of
my home directory, which includes the home directory of my server with
all my
email messages.

-----------------------------------------


Dave, try this: tar -tzvf file.tar.gz.


The -t option means test. It will test the archive and will tell you if
the archive is corrupt or not.

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Old 09-28-2010, 08:14 PM
David Fletcher
 
Default SUSPECT: File decryption

>
> Dave, try this: tar -tzvf file.tar.gz.
>
>
> The -t option means test. It will test the archive and will tell you if
> the archive is corrupt or not.
>

Tried it. It runs through the entire file then back to the prompt, no
errors displayed. The file was copied to/from a presumably FAT formatted
flash drive so it's owned by me.

When I use this file for real, I do a fresh install of an operating
system, with user name administrator, update, restart, copy on this file
and unpack it. Then use the contents of the old passwd, group and shadow
files to reinstate the user accounts. Then use tar to unpack it again -
this time tar knows how to set the correct file ownerships. System
restored.

Right now I'm using Evolution connected to my IMAP server via WiFi on
the same machine that's showing the file unpack error message, so I
don't know what's causing it. It's an old machine with a fanless
mini-ITX board replacing the original, that I want to set up as a loaner
to friends.

I might replace the HDD with a newer, spare SATA unit next, see if that
makes any difference. Can't think of anything else to try.

Dave



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