[NMLUG] encrypted loopback filesystems

[havoc at harrisdev.com (Jody Harris)]

Using dd, I created an empty "disk image."

I then attempted to use losetup to create an filesystem on that image, 
but I keep getting:
ioctl: LOOP_SET_STATUS: Invalid argument, requested cipher or key length 
(128 bits) not supported by kernel

So, I recompiled the kernel with all of the crypto options turned on. 
Even with the new kernel, I'm still getting the "not supported" message.

Apparently, I overlooked something in the kernel configuration.  What 
should I be looking for?

thanks,
jody
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