AES 256 bit keys with CC310 cryptocell

[dvescovi]

The AES tests for the CC310 cryptocell backend seem to only use the 128 bit key length.

While ECDF seems to support bigger key sizes (192, 256) AES does not.

Is this a hardware limitation of the CC310 CryptoCell?

Is it possible to use 256bit key length for AES with the CryptoCell?

[Jakub Rzeszutko]

Hi,

Yes it is CC310 limitation in regards to AES.

You can use mbdetls backend if you need 192 or 256 bits.

[dvescovi]

is the mbdetls backend hardware acceleerated? Or is it software?

[Jakub Rzeszutko]

It is software.