[linux-lvm] creating a LVM ontop of a cryptated (ppdd) loop back device

[Jon Bendtsen]

Jose Luis Domingo Lopez wrote:
> 
> On Friday, 18 October 2002, at 09:24:03 +0200,
> Jon Bendtsen wrote:
> 
> > José Luis Domingo López wrote:
> > > I haven't tried, but wouldn't it be possible to just take a snapshots
> > > from a LV containing an encrypted filesystem, and then loop-mount it
> > > (assuming encrypted via the loop device), give the password, and then
> > > backup ?
> >
> Well, I finally got to work, and made some test, as promised... And it
> seems to work !. A list of commands used (and explanations) follows:

oops, i knew i forgot something. I made loop-aes work as well. Sorry.
I even talked with Jari, and he said the problem was that ppdd used the
first 1k of the block device, which AES (and other loop-aes ciphers)
didnt.


[cut]


> As said in my first post to this thread, the encryption layer is
> provided by loop-aes (loop-aes.sourceforge.net), which is easy to setup
> and is quite well documented (except for one little but annoying detail:
> instead of "AES", the algorithm is called "rijndael", otherwise "loop"
> complains loudly about an "unknown algorithm type").

hmm ?? rijndael ?
I've used it just fine with losetup -e AES256




JonB