Hi.

I am trying to use 'losetup -e' to create an encrypted file system image file. I am running fedora core 3 system. I am running 2.6.11.8 kernel. I have configured the kernel to support loopback device, cryptoloop, and crypto APIs.

I have loaded cryptoloop module, loop module, and des module before using 'losetup'. However, when I type 'losetup -e des /dev/loop0 a.img', it first asks me for password and then gives the following error messages:

ioctl: LOOP_SET_STATUS: invalid argument

Can anyone please help me out!!!

Thanks in advance,
Sam Lee

You don't say which distro you are using. There is a new version of losetup and the crypto out there that works for me (I have some v 2.12 ). It requires you to specify the key length; I did

losetup -e des-64 /dev/loop0 a.img

there seems to be some confusion about that keylength - in /proc/crypto you can look up the min and max key lengths but that seems to be in bytes while the above is in bits, times 8.

I could also provoke your error message by unloading the cryptoloop module - are you sure it's loaded?

Hope it helps,

mlp

Hi,

Not sure if this will help you, but it did make it work for me:

modprobe cryptoloop

and then:

losetup -e cryptomethod /dev/loop0 <container/drive>
etc etc

Good luck!

Azleep