cryptsetup with arc4 cipher

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Hello list,

I was recently looking for dm-crypt cipher benchmarks and came across
this:

  http://blog.wpkg.org/2009/04/23/cipher-benchmark-for-dm-crypt-luks/

I was surprised to see arc4 perform so badly, particularly since
"openssl speed" results tell a very different story.  I decided to do
some simple benchmarking of my own but I can't seem to get cryptsetup to
work with arc4:

  # cryptsetup luksFormat --align-payload=512 -q -c arc4 /dev/sda4 key
  # cryptsetup luksOpen -d key /dev/sda4 ctest
    Command failed: No key available with this passphrase.

The above commands work fine with aes.  I can see arc4 in /proc/crypto.

Any ideas?


Regards,
Stelios.

-- 

Stelios Bounanos
perl -e 'print+reverse"t\nney.ttno\@esb"=~/(..)/sg'     #key: 0xE88A7F61
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