[clug] Can't mount an encrupted backup file system

[jhock]

Hi Ian,

I did the 'modprobe sha256'  command with no improvement. I then did a
'sudo apt-get update' and noticed lots of packages were updated or
loaded.  I then tried the 'sudo cryptsetup luksAddKey /dev/sdb1 backup'
command and got a little bit further this time:

$ sudo su -
# cryptsetup luksAddKey /dev/sdb1 backup
Enter any passphrase:
Verify passphrase:
NO key available with this passphrase.
#

There is no entry for 'backup' in the /dev/mapper directory.

On previous occasions I wasn't even prompted for a passphrase so the
update and/or 'modprobe sha256' command has moved me along slightly.

Thanks.

John

On Thu, 2012-06-14 at 10:30 +1000, Ian Munsie wrote:
> > This command on the old eeePC for the 1Tb backup disk gives:
> >
> > # cryptsetup luksDump /dev/sdc1
> > LUKS header information for /dev/sdc1
> >
> > Version:        1
> > Cipher name:    aes
> > Cipher mode:    cbc-essiv:sha256
> > Hash spec:      sha1
> ...
> > old:
> > ====
> > $ cat /proc/crypto
> > name         : ecb(aes)
> > name         : sha256
> > name         : sha224
> > name         : cbc(aes)
> > name         : cbc(aes)
> > name         : aes
> > name         : aes
> > name         : stdrng
> > name         : md5
> >
> > new:
> > ====
> > $ cat /proc/crypto
> > name         : cbc(aes)
> > name         : ecb(aes)
> > name         : aes
> > name         : aes
> > name         : ecb(arc4)
> > name         : arc4
> > name         : stdrng
> > name         : md5
> 
> The hash you are using (sha256) is missing from your new kernel, can you try
> running (as root):
> 
> modprobe sha256
> 
> Then try mounting the filesystem again.
> 
> Cheers,
> -Ian