Re: how to create an encrypted loop device?

[Andreas Janssen <andreas.janssen@bigfoot.com>]

Hello

Toshiro (<toshiro@internet.com.uy>) wrote:

> I'm trying to create an encrypted loop device, but when I try to
> execute
> 'losetup -e blowfish  ~/encripted_file' I get the following error
> (after typing the password):
> ioctl: LOOP_SET_STATUS: invalid argument
> 
> Anybody knows why this happens?
> 
> Toshiro.
> 
> PS: I'm running Debian unstable with all the latest packages, and I
> have both 'loop.o' and 'blowfish.o' loaded.

You also need the cryptoloop module and as far as I know tell losetup
which device to use:

losetup -e blowfish /dev/loop0 ~/encrypted_file

After telling losetup the keysize and password, you can create a
filesystem on /dev/loop0 and mount it. Later, you can mount it directly
without using losetup:

mount ~/encrypted_file /some/dir -o encryption=blowfish,loop

best regards
        Andreas Janssen

-- 
Andreas Janssen
andreas.janssen@bigfoot.com
PGP-Key-ID: 0xDC801674
Registered Linux User #267976