BTW. I created a script that tests all possible ciphers, keysizes,
chaining modes and iv modes for dm-crypt. arc4 is the only one that fails.
You can add it your regression testsuite if you want.
Mikulas#!/bin/sh
dmsetup remove cr0
set -e
cipher="$@"
cryptsetup -d key $cipher create cr0 /dev/ram
On 01/25/2010 07:29 PM, Mikulas Patocka wrote:
> Hi
>
> When using arc4 to encrypt a block device, the resulting device is
> unreliable. It reads garbage. That's because arc4 is a stream cipher, if
> you write something, it advances its state and if you attempt to decrypt
> the same sector, it
Hi
When using arc4 to encrypt a block device, the resulting device is
unreliable. It reads garbage. That's because arc4 is a stream cipher, if
you write something, it advances its state and if you attempt to decrypt
the same sector, it uses new state that is different.
This patch disables the
