[dm-crypt] using dm-crypt on 2.6.35 kernel

Arno Wagner arno at wagner.name
Fri Jan 7 16:39:39 CET 2011

On Fri, Jan 07, 2011 at 01:56:44PM +0530, Madhurima . wrote:
> HI,
> I have Linux 2.6.35 kernel on my device and I need to enable file system
> encryption for the device. Is it possible to use DM-crypt on the 2.6.35
> kernel. I read it somewhere that it can be used only on 2.6.4.

I suggest you read that again. If it truely says that, I
would like to know where that is writtem, because it is
complete nonsense.
> If yes, how?

Read the cryptsetup man page ("man cryptsetup") and the FAQ
at http://code.google.com/p/cryptsetup/wiki/FrequentlyAskedQuestions
This will take a few hours but cannot really be replaced
by some quick hints here. There are a few risks and issues you 
need to understand before using disk encryption. If the man-page 
is not there, install the cryptsetup package.
> I am sorry if the question sounds silly but I am new to linux and do not
> know how patches and stuff works there.

You do not need a patch. The driver/kernel side is typically
already in the kernel, unless you expicitely compiled a kernel
without it. For the user-space tools (the  UI if you like),
you can either install the cryoptsetup packacke with
the mechanism your Linux distribution uses (there are different
ways, depending on the distribution, but the package will
be cryptsetup). Or you can compile from sources in the 
standard way for source packages. The later is likely also 
coverd in the docunmentation for your distribution somewhere.

If this is in an embeded context, things will likely be more

Arno Wagner, Dr. sc. techn., Dipl. Inform., CISSP -- Email: arno at wagner.name 
GnuPG:  ID: 1E25338F  FP: 0C30 5782 9D93 F785 E79C  0296 797F 6B50 1E25 338F
Cuddly UI's are the manifestation of wishful thinking. -- Dylan Evans

If it's in the news, don't worry about it.  The very definition of 
"news" is "something that hardly ever happens." -- Bruce Schneier 

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