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Date: Thu, 15 Jun 2006 17:53:45 +0400
From: Maxim Timofeyev <tmahome@....spb.ru>
To:  owl-users@...ts.openwall.com
Subject: Re: Owl: crypto

I was mistaken when using SHA1. But for example AES does not work.
It is possible to ask to give an example precisely working?
About 2 years ago problems has not arisen.

# losetup -e AES /dev/loop0 /tmp/cr
Password:
ioctl: LOOP_SET_STATUS: Invalid argument, requested cipher or key length (128
bits) not supported by kernel

# losetup -e AES128 /dev/loop0 /tmp/cr
Password:
ioctl: LOOP_SET_STATUS: Invalid argument, requested cipher or key length (128
bits) not supported by kernel

Solar Designer пишет:
> On Tue, Jun 13, 2006 at 04:00:08PM +0400, Maxim Timofeyev wrote:
>> For some reason it is impossible to create crypto fs...
>>
>> # for i in aes anubis arc4 blowfish cast5 cast6 crypto_null deflate des khazad
>> md4 md5 michael_mic serpent sha1 sha256 sha512 tcrypt tea twofish wp512; do
>> modprobe $i; done
>>
>> # echo 123 | losetup -e sha1 -k 128 -p 0 /dev/loop0 /dev/md4
>> ioctl: LOOP_SET_STATUS: Invalid argument, requested cipher or key length (128
>> bits) not supported by kernel
> 
> You're doing something weird.  SHA-1 is a message digest (hashing)
> algorithm, you can't use it as the cipher for encrypting a filesystem.
> 
> Also, most of the time you should not be specifying an explicit key size
> (the -k option).  Once you choose a cipher, there are only a few or even
> a single valid key size for that cipher.  If you try to specify another
> (invalid) key size, you will get an error message such as the above.
> 

-- 
С уважением,
Тимофеев Максим Анатольевич
JabberID: tma@....spb.ru
E-Mail: tma@....spb.ru
WWW: http://tma.spb.ru

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