[dm-crypt] How To use FPGA to encrypt disk for dmcrypt

[dm-crypt] How To use FPGA to encrypt disk for dmcrypt

[Bai Shuwei]

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Hi, All:
   Now I implement xts-aes algorithm with FPGA for disk encryption. But I am
not sure how to write my device driver to connenct the dmcrypt and FPAG
device. I hope some body can give me some idea where I should change to make
the dmcrypt use FPGA.

Thanks ALL!

Bai SHuwei


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Love other people, as same as love yourself!
Don't think all the time, do it by your hands!

Personal URL: http://dslab.lzu.edu.cn:8080/members/baishw/
E-Mail: baishuwei@gmail.com

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Re: [dm-crypt] How To use FPGA to encrypt disk for dmcrypt

[Milan Broz]

On 11/18/2009 02:23 PM, Bai Shuwei wrote:
>    Now I implement xts-aes algorithm with FPGA for disk encryption. But
> I am not sure how to write my device driver to connenct the dmcrypt and
> FPAG device. I hope some body can give me some idea where I should
> change to make the dmcrypt use FPGA.

If you integrate it to kernel crypto-api, it will be used automatically
when this module loads and the aes-xts mode is used in the mapping.

(Current crypt providers/drivers with it usage priorities are visible
in /proc/crypto - kernel prefers optimized drivers before generic one this way).

Ask on linux-crypto@vger.kernel.org mailing list how to do that properly.

Milan
--
mbroz@redhat.com

Re: [dm-crypt] How To use FPGA to encrypt disk for dmcrypt

[Bai Shuwei]

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On Wed, Nov 18, 2009 at 9:31 PM, Milan Broz <mbroz@redhat.com> wrote:

> On 11/18/2009 02:23 PM, Bai Shuwei wrote:
> >    Now I implement xts-aes algorithm with FPGA for disk encryption. But
> > I am not sure how to write my device driver to connenct the dmcrypt and
> > FPAG device. I hope some body can give me some idea where I should
> > change to make the dmcrypt use FPGA.
>
> If you integrate it to kernel crypto-api, it will be used automatically
> when this module loads and the aes-xts mode is used in the mapping.
>
> (Current crypt providers/drivers with it usage priorities are visible
> in /proc/crypto - kernel prefers optimized drivers before generic one this
> way).
>
> Ask on linux-crypto@vger.kernel.org mailing list how to do that properly.
>
> Milan
> --
> mbroz@redhat.com
>

Now, I am trying to build the interface for dm-crypt using my FPGA. I find
there are two routines can register the algorithm

crypto_register_template()

and

 crypto_register_alg()

So i want to know what's the difference between them. and which i should
choice to make my driver easier?  Whether am i right to use the routine for
my project?

Thanks!



-- 
Love other people, as same as love yourself!
Don't think all the time, do it by your hands!

Personal URL: http://dslab.lzu.edu.cn:8080/members/baishw/
E-Mail: baishuwei@gmail.com

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Re: [dm-crypt] How To use FPGA to encrypt disk for dmcrypt

[Arno Wagner]

On Wed, Nov 18, 2009 at 09:23:57PM +0800, Bai Shuwei wrote:
> Hi, All:
>
>    Now I implement xts-aes algorithm with FPGA for disk encryption. But I
> am not sure how to write my device driver to connenct the dmcrypt and FPAG
> device. I hope some body can give me some idea where I should change to
> make the dmcrypt use FPGA.
> 
> Thanks ALL!
> 
> Bai SHuwei

I think basically you want to provide this via the crypto accelerator
hardware to the kernel, i.e. write a cryoto hardware kernel driver. 
Then you can just select that cipher for dm-crypt from the commandline.

Arno
-- 
Arno Wagner, Dr. sc. techn., Dipl. Inform., CISSP -- Email: arno@wagner.name 
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