multiprotocol - Use openThread Crypto and BLE LESC Crypto

[bubble23]

Hi,

i use the nRF5 SDK for Thread and Zigbee v4.1.0, the s140 an the ble_thread_dyn_proximity - example.

I want to use the LESC encryption of BLE (in addition to Thread). For this I looked at the LESC encryption in example ble_app_gls and added the crypto files to the ble_thread_dyn_proximity project.
In the sdk_conf.h I enabled the NRF_CRYPTO and BACKEND_CC310. Logically SES brings an error "multiple definition of `EcWrstGenKeyPair" this is probably related to the fact that Thread uses the libmbedcrypto_cc310_backend.a.
Now my question: How can I configure the sdk_config.h that Thread works and the LESC encryption of BLE?

Thanks in advance

[Sigurd Hellesvik]

Hi again

Just talked to a colleague, and we have Thread Multiprotocol samples, as well as a guide on Adding dynamic multiprotocol Thread support to BLE examples.

If I were you, I would start by following this guide and see if it works after you have done so.

Let me know if you still struggle with the issue after that, and good luck!

Regards,
Sigurd Hellesvik

[bubble23]

Hello Sigurd,
thank you very much for your reply. I have done the example on "Adding Dynamic multiprotocol Thread suppport to BLE examples". Only unfortunately it does not solve my problem. I mainly focused on the Reference example here. "<InstallFolder>\examples\multiprotocol\ble_thread_dyn_mtd_coap_cli", which is the modified version of " ble_app_uart". This version does not include LESC encryption for BLE. Do you know of an example where LESC and Thread are used together?

Regards

[Sigurd Hellesvik]

Hi

No, we do not have any finished examples for LESC+Thread.

Regards,
Sigurd Hellesvik

[bubble23]

Hello Sigurd,
is it possible to run both at the same time? Maybe with restrictions that the "nRF Crypto " uses a software backend and not the cc310 backend or can possibly the "libmbedcrypto_cc310_backend.a" from Thread be used for BLE LESC? I would be very grateful for a hint.

Greetings

[Sigurd Hellesvik]

Hi

To double check that this is possible, I am applying the below tutrial on adding Thread to Bluetooth Low Energy to the Heart Rate Application.

I have not been able to build it successfully yet, but will return when I have done so.
Feel free to try to do this yourself as well.

Regards,
Sigurd Hellesvik

[bubble23]

Hi,

I started testing the proposed project for myself and discovered when adding the libs that there are several variants for the mbedTLS variants. Here is a software-only variant (infocenter.nordicsemi.com/.../thread_openthread_libraries.html, I will test further and report...

[Sigurd Hellesvik]

Hi

After some trying, I were not able to make a functional example from the tutorial today.
Let me know if you are still struggling with this next week, and I will give it another try on Tuesday.

I found however, that the BLE UART and Thread MTD CoAP Client Example have LESC enabled in the settings. Maybe this could be useful for you.

Regards,
Sigurd Hellesvik

[bubble23]

Yes, that is what I am looking for! The example helps me a lot! Thanks a lot!