Re: problems w/ AES & Twofish modules + losetup

[Christoph Hertel <c.hertel@usa.net>]

It's been a week now since my last posting, so in short:
I compiled a 2.2.16 kernel with a 2.2.18.3 int_patch and modules for
AES, Twofish and Blowfish. Only the Blowfish part is working.

* Alexander S A Kjeldaas [2001-01-07]:
> On Sun, Jan 07, 2001 at 12:19:50PM +0100, Christoph Hertel wrote:
> > /home/chh# losetup -e Twofish /dev/loop0 cryptotest   
> > Password :
> > ioctl: LOOP_SET_STATUS: Invalid argument
> > /home/chh# losetup -e AES /dev/loop0 cryptotest 
> > Unsupported encryption type AES
> > /home/chh# losetup -e Rijndael /dev/loop0 cryptotest 
> > Unsupported encryption type Rijndael
> I always use lower-case names.  From the top of my head I'm not sure
> that it works with mixed-case (I'll have to fix that I think).
I tried it lowercase and it doesn't work (same messages).

> > alias cipher-3          fish2                                                   
> You cipher-3 alias is wrong - it should point to twofish, not fish2.
I changed it, it doesn't work.

The original crypto-aliases coming with Debian modutils (2.3.23-2) are:
# Crypto modules (see http://www.kerneli.org/)
alias loop-xfer-gen-0   loop_gen
alias loop-xfer-3     loop_fish2
alias loop-xfer-gen-10  loop_gen
alias cipher-2          des
alias cipher-3          fish2
alias cipher-4          blowfish
alias cipher-6          idea
alias cipher-7          serp6f
alias cipher-8          mars6
alias cipher-11         rc62
alias cipher-15         dfc2
alias cipher-16         rijndael
alias cipher-17         rc5

With these, blowfish works, modprobe complains about not finding
locate-xfer-3 and cipher-3 (when I try Twofish) and doesn't say anything
for Rijndael (twofish and rijndael modules aren't loaded, too).

According to the HOWTO I removed cipher-3 and added instead "alias
cipher-9 twofish". I also removed loop-xfer-3 (which was source of
modprobe-complains). The effect is, that modprobe doesn't complain
anymore and the kernel says:
kernel: cryptoapi: Registered twofish (9)
kernel: cryptoapi: Registered twofish-cbc (65545)
That's new, that's good, something happened, the twofish modules got
loaded! Unfortunately, losetup is still complaining like before (see
above).

So, where can I get the-one-and-only (TM) cipher-aliases? Is there
anybody with crypto-modules out there? What's in your modules.conf?

This whole module-alias-thingy is a complete black box to me. Can
somebody give me a link to an explanatory text, or is this nothing for
somebody who couldn't get any infos regarding my question out of
/usr/src/linux/Documentation/modules.txt and 'man modules.conf'?


Thanks for your help.

Christoph
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