TLS in nR5 SDK 17.1.0

RE: TLS in nR5 SDK 17.1.0

Kazi Afroza Sultana — Fri, 29 Apr 2022 12:47:56 GMT

Hello,

I have consulted to our security expat.

mbedTLS is a generic crypto library, so it is used to provide support for various crypto operations. Specifically, in recent nRF5 SD versions it is typically used as a backend to nrf_crypto (which provides a unified API for many crypto operations regardless of which library or HW resources that is used to do the actual number crunching)

You can check in this https://infocenter.nordicsemi.com/topic/sdk_nrf5_v17.1.0/lib_crypto.html link.

Thanks.

Best Regards,

Kazi Afroza Sultana

RE: TLS in nR5 SDK 17.1.0

Lucas Gabriel Coliado Bandeira — Mon, 25 Apr 2022 11:28:54 GMT

Understandable, Kazi.

This information is a bit concerning because it seems that porting projects from earlier SDKs can become a hassle.

Lastly, as per my original ticket, could you inform me what mbedTLS in the externals folder is being used for in the SDK 17.1.0?

This previously seemed to pair exclusively with the IoT library, but now it seems like a left over dependency that lacks porting. Am I mistaken or is there no TLS use whatsoever in the SDK?

Thank you

RE: TLS in nR5 SDK 17.1.0

Kazi Afroza Sultana — Mon, 25 Apr 2022 07:31:42 GMT

Hello Lucas,

I am sorry for making you confused. IoT library was removed so the files are not included in recent SDK versions. SDK 16.0.0 is the latest with the IoT components.

I have found this thread useful for you IoT components removed in nRF5 SDK v17.0.0 - Nordic Q&A - Nordic DevZone - Nordic DevZone (nordicsemi.com).

Thanks.

Best Regards,

Kazi Afroza Sultana

RE: TLS in nR5 SDK 17.1.0

Lucas Gabriel Coliado Bandeira — Fri, 22 Apr 2022 12:37:37 GMT

In the previous reply it was said the "IoT libraries are the same as before". I'm confused now.

Has the IoT library been removed then?

RE: TLS in nR5 SDK 17.1.0

Kazi Afroza Sultana — Fri, 22 Apr 2022 10:25:15 GMT

Hello,

As I told you in my previous reply we are no longer support this so in new SDK you will not have any documentation regarding this.

Thanks.

Best Regards,

Kazi Afroza Sultana

RE: TLS in nR5 SDK 17.1.0

Lucas Gabriel Coliado Bandeira — Wed, 13 Apr 2022 12:34:41 GMT

Where is the IoT library located now? It's no longer mentioned in the documentation and all example code seems to have been purged.

In nRF5 SDK 15.2 it is located in the /components/iot/ folder, such folder no longer exists in the nRF5 SDK 17.1.0

RE: TLS in nR5 SDK 17.1.0

Kazi Afroza Sultana — Wed, 13 Apr 2022 00:46:52 GMT

Hello,

IoT libraries of nRFSDK is same as it was before and we have currently no plan to add new features. You can use the previous features on your application.

Regarding crypto/entropy sources of nRF52840, RNG peripheral needs an entropy source. And that is available in the nRF, and is used by the SoftDevice and other libraries that need entropy ( https://infocenter.nordicsemi.com/topic/ps_nrf52840/rng.html?cp=4_0_0_5_20 ).

Thanks.

Best Regards,

Kazi Afroza Sultana