Problem in adding cypto-graphic function to project

[alireza11048]

Hi to all, i am developing an app with nrf52840 and i want to use cc310 backend to generate ecc public/private key pair. after adding some files and enabling cc310 backend and yring to use nrf_crypto_ecc_key_pair_generate func to create key pair, the program encountred with below errors, can any one say me where can i find implementation of the function that listed below??

.\_build\nrf52840_xxaa.axf: Error: L6218E: Undefined symbol nrf_crypto_backend_cc310_key_pair_generate (referred from nrf_crypto_ecc.o).
.\_build\nrf52840_xxaa.axf: Error: L6218E: Undefined symbol nrf_crypto_backend_cc310_private_key_from_raw (referred from nrf_crypto_ecc.o).
.\_build\nrf52840_xxaa.axf: Error: L6218E: Undefined symbol nrf_crypto_backend_cc310_private_key_to_raw (referred from nrf_crypto_ecc.o).
.\_build\nrf52840_xxaa.axf: Error: L6218E: Undefined symbol nrf_crypto_backend_cc310_public_key_from_raw (referred from nrf_crypto_ecc.o).
.\_build\nrf52840_xxaa.axf: Error: L6218E: Undefined symbol nrf_crypto_backend_cc310_public_key_to_raw (referred from nrf_crypto_ecc.o).

i am using sdk15 and soft device 14 with keil compiler

[Jørgen Holmefjord]

Hi,

The functions are defined in the file nRF5_SDK_15.2.0_9412b96\components\libraries\crypto\backend\cc310\cc310_backend_ecc.c.

Note that you need to enable the following configs in sdk_config.h for the functions to be compiled in:

• NRF_CRYPTO_ENABLED
• NRF_CRYPTO_BACKEND_CC310_ENABLED

Best regards,
Jørgen

[alireza11048]

Thanks for your response, now i am able to compile the project and calling the function nrf_crypto_ecc_key_pair_generate. but still i am not able to create key pairs. when i call the nrf_crypto_ecc_key_pair_generate function it return 0x00008502 error code. i had enabled NRF_CRYPTO and NRF_CRYPTO_CC310_ENABLED macros int the sdk_config.h and also memory allocator had set to default in the sdk_config. when i debug the app, i saw that nrf_crypto_ecc_key_pair_generate function itself invoke CRYS_ECPKI_GenKeyPair function and this function return CRYS_RND_INSTANTIATION_NOT_DONE_ERROR. do you know how can i sove this problem??

thanks

[Jørgen Holmefjord]

Did you set config to enable HW RNG in the CC310? 

Backend	Enabled define
CC310	NRF_CRYPTO_BACKEND_CC310_RNG_ENABLED
nRF HW RNG	NRF_CRYPTO_BACKEND_NRF_HW_RNG_ENABLED

[Siddharth rana]

I get 

Undefined reference to " CRYS_Rndinit"  error.

All the error related to ,

Cc310_backned_rng.o,init.o ,ecc.o files

[cyakimov]

Hey, I just wanted to share that I stumbled with this problem too and the suggested solution didn't work for me.

In addition to enabling

• NRF_CRYPTO_ENABLED
• NRF_CRYPTO_BACKEND_CC310_ENABLED
• NRF_CRYPTO_BACKEND_CC310_RNG_ENABLED

I also had to enable the following macros in sdk_config.h

• NRF_CRYPTO_RNG_AUTO_INIT_ENABLED
• NRF_CRYPTO_RNG_STATIC_MEMORY_BUFFERS_ENABLED

As it's described in the RNG Configuration section.