Migration from loop-aes to cryptsetup

Question

I've upgraded my linux installation to kernel 2.6.38-2 (Debian testing). With the new kernel, loop-aes does not compile, so I cannot mount my encrypted volumes. I heared that it is possible to use some compatibility mode of cryptsetup to mount encrypted volumes of loop-aes, so my question is:

How can I do that?

I have been searching for hours with Google and couldn't find anything that worked. With loop-aes, I was mounting partitions with the following entry in /etc/fstab:

/dev/sdb2 /mount/data ext4 user,noauto,loop,encryption=aes256 0 0

How would the cryptsetup command line look like? I would prefer an fstab entry, if possible, but a command line would do as well. I'm fairly desperate!

Cheers, Thomas.

Answer 1

cryptsetup loopaesOpen <device> <name> [--key-size 128] --key-file <key-file>, according to http://code.google.com/p/cryptsetup/wiki/Cryptsetup130. If your cryptsetup isn't 1.3.0, you're gonna have to download that version and compile it.

cryptsetup opens the volume and creates a new block device in /dev/mapper/<name> You then have to use the mount command after cryptsetup to actually use it.

I know crypttab is involved in setting up boot-type encrypted volumes but I wrote my own scripts to manually mount them on demand so I have no experience with that, unfortunately.