Re: [linux-sunxi] Re: AW: problem with testing a CTR block cipher mode which is partially working

[Corentin LABBE <clabbe.montjoie@gmail.com>]

On 04/01/15 04:06, kevin.z.m.zh@gmail.com wrote:
> Dear All,
> 
> 
> About the SS module, there is some detail information.
> There is some issues on the SS hardware module, the issues make the some
> AES/DES/3DS algorithm be not available.
> 1. The byte order of the counter is wrong, make the result error, so, the CTR
> mode is not available.
> 2. Hardware don't support the continuous subcontracting, make the CTS mode is
> not available.
> 3. Another issue need be taken attention is that hardware will modify the key
> register when do AES encrypt, so, it need software to restore the key register
> 
> when doing every frame.
> 
> These issues are presented on the A10, A13, A20, A31 and A33.
> The issues of SS module have been fixed on the A83T platform, so, I suggest to
> take more attention to the A83T platform if any interest in the SS module.
> 
> If any problem, please don't hesitate to contact me(kevin@allwinnertech.com)
> 
> or Shuge(shuge@allwinnertech.com).
> 

Thanks for your answer, I have loose hours on that problem.

Perhaps you could update all datasheet/user manual about this known issue ?

Regards