Windows 10 LESC?

RE: Windows 10 LESC?

_Mickey — Mon, 01 Jul 2024 12:28:27 GMT

Hi Rocky,

Have you solved this problem? i had same problem, Now I can successfully generate Public key and private key, but in the BLE_GAP_EVT_LESC_DHKEY_REQUEST event, I get the wrong public key, but in the NRF Sniffer, the public key is correct. I don't know what went wrong

Code:

Correct Public key

Wrong Public Key

RE: Windows 10 LESC?

bjorn-spockeli — Tue, 15 Jan 2019 09:40:30 GMT

HI TJ,

I just spoke with the nRF Connect devs.

nRF Connect for Desktop uses the JS implementation of pc-ble-driver, pc-ble-driver-js. The JS implementation uses the micro-ecc library to generate the private and public keys used for LESC, however, its been wrapped in a C++ API in pc-ble-driver-js, see https://github.com/NordicSemiconductor/pc-ble-driver-js/blob/master/src/driver_uecc.cpp.

They suggested to look at this test for a simple example on how this is used in the source.

Best regards

Bjørn

RE: Windows 10 LESC?

Rocky — Mon, 14 Jan 2019 18:57:57 GMT

Another options I considered is writing Javascript plugins for nRF Connect. It seems like the Javascript lib is updated more frequently than the Python lib. Do you know if the Javascript implementation supports LESC?

RE: Windows 10 LESC?

bjorn-spockeli — Mon, 14 Jan 2019 15:39:23 GMT

Hi TJ,

You are right that you will need to generate the public and private DH encryption keys. We use the pc-ble-driver in nRF Connect for Desktop, which supports LESC paring. Not quite sure how we solve this in nRF Connect. I will contact the devs and see if they can shed some light on this.

Bjørn

RE: Windows 10 LESC?

Rocky — Tue, 08 Jan 2019 21:23:40 GMT

Hi,

Yes, I see that the the nRF52840 is now released and working with the pc-ble-driver. I usually use the Python wrapper (pc-ble-driver-py), but the support for this is lagging and I don't think it yet works with the nRF52840. Perhaps I could switch to C/C++ and implement using the pc-ble-driver directly.

Do you have any thoughts or examples on how I could implement a central that supports LESC using pc-ble-driver? It seems like this would require quite a bit of additional code to get working. For example, wouldn't I need to port one of the crypto libraries and some of the SDK libraries like nrf_crypto, and security_manager to the Windows build?

Any other suggestions are welcome. My goal is to create a PC test station to be used to test the security implementation (LESC) on a peripheral.

RE: Windows 10 LESC?

bjorn-spockeli — Thu, 25 Oct 2018 08:20:54 GMT

Hi TJ,

you can use our pc-ble-driver library together with a nRF52840 Dongle to implement LESC on Windows.

Best regards

Bjørn

RE: Windows 10 LESC?

Rocky — Mon, 01 May 2017 19:21:55 GMT

I posted a similar question on the Microsoft forum and got this response.

Hi! Windows 10 Creators update does not yet support Bluetooth 4.2. LE Secure Connections along with other 4.2 features will come to a future release. Thanks!

So, yeah, the nRF51 dongle might be the best bet for now. The problem is that it isn't really in a commercialized package (like the BLED112). Also, I am not sure if it has fully been through approvals for general commercial use. It would be great if someone made a commercialized dongle with the new nRF52840, but I don't see anything yet. The pc-ble-driver is a nice interface to the dongle, so that would work well.

RE: Windows 10 LESC?

Daniel Wang — Mon, 01 May 2017 17:07:04 GMT

You can use a nRF51 dongle: www.nordicsemi.com/.../nRF51-Dongle