What is the AES mode for HAB Encrypted boot?

[kanimozhi_t]

Hi,

I would like to know the AES operation mode for the HAB encrypted boot?

From the "Security Reference Manual" we know the modes supported by AESA (AES accelerator in CAAM) and wonder what is the default mode used for the HAB Encrypted mode?

Can any one answer "What is the default AES mode for HAB encryption? and/or point us the the sensible reference?"

Thanks in advance.

[Yuri · Accepted solution]

@kanimozhi_t 
Hello,

  according to section 4.3.1.1. [Install Secret Key] of app note
"Encrypted Boot on i.MX6/7 series":

CAAM uses the AES-CCM algorithm for the encrypted boot.
[...] the key length specified in this section defines which variant to use.

https://www.nxp.com/webapp/Download?colCode=AN12056

Regards,
Yuri.