nrf52840 hardware accelerated symmetric encryption key derivation

RE: nrf52840 hardware accelerated symmetric encryption key derivation

Kazi Afroza Sultana — Thu, 29 Aug 2024 16:16:35 GMT

Hello,

I got feedback from team

2. Is there already existing solution in nrf sdk for this that I may have missed? some preshared - key example?

To make sure we understand the use-case fully, can you please draw a figure of what they want to do?

3. If I enable both oberon and cryptocell is it possible to use oberon for key derivation only and use cryptocell

Feature configurations and driver support:

"If multiple drivers are enabled, the first ordered item in this table
takes precedence for an enabled cryptographic feature, unless the driver
does not enable or support it."

for hardware accelerated encryption/decryption of communication packets?

4. Should I use nrfcrypto library instead of psa?

Definetly not. Use PSA Crypto APIs.

RE: nrf52840 hardware accelerated symmetric encryption key derivation

Kazi Afroza Sultana — Fri, 23 Aug 2024 10:17:49 GMT

Hello,

I have been working on your case. I will get back to you shortly.

Thanks.

BR
Kazi

RE: nrf52840 hardware accelerated symmetric encryption key derivation

p1ng — Wed, 21 Aug 2024 15:15:20 GMT

had to replace

psa_set_key_type(&key_attributes, PSA_KEY_USAGE_ENCRYPT | PSA_KEY_USAGE_DECRYPT);

with

psa_set_key_usage_flags(&key_attributes, PSA_KEY_USAGE_ENCRYPT | PSA_KEY_USAGE_DECRYPT);

was probably copied wrong chatpt...