AES loopback filesystem encryption

[Nick]

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On 9/24/07, Michael S. Peek <peek at tiem.utk.edu> wrote:
>
> Hello all,
>
> I'm trying to create an encrypted loopback filesystem, but it bombs when
> I run the command:
>
> # losetup -e aes256 /dev/loop0 `pwd`/file.bin
> ioctl: LOOP_SET_STATUS: Invalid argument, requested cipher or key length
> (256 bits) not supported by kernel.
>
> I also tried aes (without the 256) with the same results:
> ioctl: LOOP_SET_STATUS: Invalid argument, requested cipher or key length
> (128 bits) not supported by kernel.
>
> I am running the 2.6.20-16-generic kernel, I have loop-aes-utils
> installed, and I have both the loop and aes modules loaded.
>
> When I type 'cat /proc/crypto', I get for aes:
> min keysize : 16
> max keysize : 32
>
> I did a search but it turned up nothing useful -- everything I found
> simply said to install the loop-aes-utils package, which I already have.
>
> Can anyone tell me what I have wrong?
>
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