From: Milan Broz <mbroz@redhat.com>
To: Mikulas Patocka <mpatocka@redhat.com>
Cc: dm-devel@redhat.com, Alasdair G Kergon <agk@redhat.com>,
linux-crypto@vger.kernel.org
Subject: Re: [PATCH] dm-crypt: disable block encryption with arc4
Date: Mon, 25 Jan 2010 19:39:11 +0100 [thread overview]
Message-ID: <4B5DE54F.7050206@redhat.com> (raw)
In-Reply-To: <Pine.LNX.4.64.1001251324310.18309@hs20-bc2-1.build.redhat.com>
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 uses new state that is different.
>
> This patch disables the use of arc4 on block devices.
arc4 again. it is simply not a block cipher:-)
This should be solved inside cryptoAPI and not blacklist it in dm-crypt,
see that thread
http://article.gmane.org/gmane.linux.kernel.cryptoapi/3441
Milan
next prev parent reply other threads:[~2010-01-25 18:39 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-01-25 18:29 [PATCH] dm-crypt: disable block encryption with arc4 Mikulas Patocka
2010-01-25 18:39 ` Milan Broz [this message]
2010-01-26 9:22 ` Sebastian Andrzej Siewior
2010-01-26 10:48 ` Milan Broz
2010-01-26 12:27 ` Mikulas Patocka
2010-01-26 13:34 ` Sebastian Andrzej Siewior
2010-01-26 17:11 ` Mikulas Patocka
2010-02-09 7:37 ` Herbert Xu
2010-02-09 14:02 ` Mikulas Patocka
2010-02-09 20:42 ` Herbert Xu
2010-02-09 14:57 ` Sebastian Andrzej Siewior
2010-02-09 20:45 ` Herbert Xu
2010-02-09 21:12 ` Sebastian Andrzej Siewior
2010-02-09 21:45 ` Herbert Xu
2010-02-12 8:42 ` [PATCH] crypto/arc4: convert this stream cipher into a block cipher Sebastian Andrzej Siewior
2010-02-12 9:34 ` Adrian-Ken Rueegsegger
2010-02-12 9:57 ` Sebastian Andrzej Siewior
2010-02-14 20:42 ` Sebastian Andrzej Siewior
2010-02-15 0:10 ` Herbert Xu
2010-02-15 8:49 ` Sebastian Andrzej Siewior
2010-02-16 12:51 ` Herbert Xu
2010-02-21 20:01 ` Sebastian Andrzej Siewior
2010-02-22 0:45 ` Herbert Xu
2010-02-22 0:52 ` Herbert Xu
2010-02-22 22:08 ` Sebastian Andrzej Siewior
2010-02-23 0:32 ` Herbert Xu
2010-03-14 8:24 ` Sebastian Andrzej Siewior
2010-03-14 9:06 ` Herbert Xu
[not found] ` <Pine.LNX.4.64.1002221400090.31819@hs20-bc2-1.build.redhat.com>
2010-02-23 0:15 ` Herbert Xu
2010-01-26 12:59 ` [dm-devel] [PATCH] dm-crypt: disable block encryption with arc4 Alasdair G Kergon
2010-01-25 18:39 ` Mikulas Patocka
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=4B5DE54F.7050206@redhat.com \
--to=mbroz@redhat.com \
--cc=agk@redhat.com \
--cc=dm-devel@redhat.com \
--cc=linux-crypto@vger.kernel.org \
--cc=mpatocka@redhat.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.