ECDH in the latest SDK with 52832(nRF5_SDK_17.0.0)

[Tong]

Hi, Nordic, 

      I have the follow questions in the nRF5_SDK_17.0.0_9d13099

      1. Why in the Demo ble_app_multirole_lesc  remove the BLE_GAP_EVT_LESC_DHKEY_REQUEST's process as follow which exist in the SDK_14.0.0

          nrf_crypto_ecc_public_key_from_raw(); 

          nrf_crypto_ecdh_shared_secret_compute()

          sd_ble_gap_lesc_dhkey_reply()

        How to recovery these back?  I found there have change in the crypto struct,  e.g: nrf_value_length_t doesn't exist in the new SDK.

    2.  Why most of  the 52832's project in SDK_17  import the Cryptocell CC310 as backend,  this should support only 52840,   should I change this and import uEcc by myself?

 

    Thanks !

       

    

[Jørgen Holmefjord]

Hi,

1. The handling of this event has been moved into the LESC module (nrf_ble_lesc).
2. I do not know why the library is part of the pca10040 project, but the used backend is anyway selected in the sdk_config.h file. As long as NRF_CRYPTO_BACKEND_CC310_ENABLED is not set, the library/backend will not be used.

Best regards,
Jørgen

[Tong]

OK ,  I got these,  Thanks.