Re: serpent loopback crypto "EXT2-fs: group descriptors corrupted"

["peter k." <spam-goes-to-dev-null@gmx.net>]

[moved from linux-kernel to linux-crypto]

> > i created a 10mb file called .enc2 with random data and ran "#
losetup -e
> > serpent -k 128 /dev/loop0 /mnt/hda7/.enc2"
> > then i ran "# mke2fs /dev/loop0" and tried to "# mount /dev/loop0 /enc".
but
> > i get the following error messages when trying to mount:
> >
> > May 19 21:32:10 HOST2 kernel: EXT2-fs error (device loop(7,0)):
> > ext2_check_descriptors: Block bitmap for group 16 not in group (block
0)!
> > May 19 21:32:10 HOST2 kernel: EXT2-fs: group descriptors corrupted !
> >
> > im using kernel 2.4.4 patched with crypto patch 2.4.3.1 [and util linux
> > 2.11a patched with the patch from that crypto patch]
> > i also got the same errors with a 2gb file and by creating the loop
device
> > directly on my 19.5gb /dev/hda7
> > i tried a few times again and sometimes the encrypted loopback fs works
> > perfectly, sometimes the error occurs!?
> > anyone got an idea what this is!? i will supply more information on
request
>
> International crypto patch is misdesigned and broken, period. If you don't
> want to play russian roulette with your data, you should consider using
> loop-AES package. loop-AES announcement is here:
>
>     http://mail.nl.linux.org/linux-crypto/2001-05/msg00003.html

maybe you could tell me why exactly loop-AES is more secure than the
international crypto patch? ;)

- peter k.


Linux-crypto:  cryptography in and on the Linux system
Archive:       http://mail.nl.linux.org/linux-crypto/