[nrf5_SDK_for_Mesh_v2.0.0_src]How to calculate the device key

[Kaysen Long]

Hi,

nrf5_SDK_for_Mesh_v2.0.0_src

When complete provision a provisionee , provisioner will assign provisionee a mesh key and device key.

Now i want to know how to calculate the device key , any API can I use ?

Best Regards!

[leonwj]

hello,

From the SIG Mesh specification...

And within the nRF5 Mesh Stack... look into the light_switch_provisioner example (prov_utils.c) for the prov_utils_derive_keys function:

    /* DeviceKey = k1(ECDHSecret, ProvisioningSalt, "prdk") */
    enc_k1(p_ctx->shared_secret, NRF_MESH_ECDH_SHARED_SECRET_SIZE,
           provisioning_salt,
           DEVICE_KEY_INFO, DEVICE_KEY_INFO_SIZE,
           p_device_key);

Regards,