nRF5340 CrptoCell-312 Library

RE: nRF5340 CrptoCell-312 Library

geonnave — Wed, 13 Dec 2023 10:10:17 GMT

Hi flauer,

Were you able to use the cc312 with this approach? I am in a very similar situation, where I am used to directly drive the cc310 using the available lower level library, but now with the cc312 I am having problems -- I link the libraries and include the headers, but am having missing symbols errors.

Also, I cannot find the /ncs/(...) folder you refer to, but it may be the case that the mbedtls files have been moved around in newer versions (nowadays they seem to be at ./crypto/nrf_cc312_mbedcrypto/include/mbedtls).

RE: nRF5340 CrptoCell-312 Library

Einar Thorsrud — Wed, 14 Apr 2021 13:15:32 GMT

Hi,

Yes, that is correct.

RE: nRF5340 CrptoCell-312 Library

flauer — Wed, 14 Apr 2021 13:08:39 GMT

Hi,

Thank you for your fast reply! Okay the nrf_cc3xx_mbedcrypto library is the folder i already mentioned, but i now think i got it. The actual declarations are in the /ncs/mbedtls/include/mbedtls folder and by setting the ..._ALT defines, some of the implementations in the .c file are excluded and replaced with functions inside the libnrf_cc312_mbedcrypto_x.x.x.a correct?

So then its quite similar with solution in the nrf5-sdk but without an extra layer of header files.

RE: nRF5340 CrptoCell-312 Library

Einar Thorsrud — Wed, 14 Apr 2021 12:01:35 GMT

Hi,

The lowest level library available to access the CC312 is the nrf_cc3xx_mbedcrypto library, which is typically used as backend in nrf_security. I suspect these are what you are looing for. Note that the CC312 can only be used form secure mode. You can look at the crypto test code found under <ncs>\nrf\tests\crypto\ as reference.

(For application development going forward it is more sensible to look at the PSA TF-M API, though the implementation is not mature at this point. See TF-M Hello World sample if relevant).