Device Manager Query?

RE: Device Manager Query?

abhiarora — Mon, 16 Jan 2017 07:21:14 GMT

I was looking at [S110] (devzone.nordicsemi.com/.../a01269.html Documentation of sd_ble_gap_sec_params_reply(). And then i found out other definitation of it in S120. The APIs declaration in these two documentation is different. The parameter of type ble_gap_sec_keyset_t is not available in S110.

RE: Device Manager Query?

Petter Myhre — Thu, 12 Jan 2017 16:28:53 GMT

I had a look. I'm not sure how to explain this in a better way, maybe the API documentation is clearer:

Pointer to a ble_gap_sec_keyset_t security keyset structure. Any keys distributed as a result of the ongoing security procedure will be stored into the memory referenced by the pointers inside this structure. The keys will be stored and available to the application upon reception of a BLE_GAP_EVT_AUTH_STATUS event.

It is an in,out argument.

RE: Device Manager Query?

abhiarora — Thu, 12 Jan 2017 16:00:05 GMT

I have edited my question. Please have a look.

RE: Device Manager Query?

Petter Myhre — Thu, 12 Jan 2017 11:20:15 GMT

No, it is not in ble_gap_evt_auth_status_t. The keys will be available in the ble_gap_sec_keyset_t struct that you give a pointer to whn you call sd_ble_gap_sec_params_reply(). It should not be a NULL pointer, it should only be a NULL pointer if you do pairing, and then there will not be any LTK. The LTK is always random. You get the keys by accessing the struct that you gave a pointer to when you called sd_ble_gap_sec_params_reply() after you get the BLE_GAP_EVT_AUTH_STATUS event.

RE: Device Manager Query?

abhiarora — Thu, 12 Jan 2017 11:04:50 GMT

If i am looking into struct ble_gap_evt_auth_status_t when i receive BLE_GAP_EVT_AUTH_STATUS event. I didn't find ble_gap_sec_keyset_t struct over there. Also, if i make key pointers in struct ble_gap_sec_keyset_t NULL in a reply to BLE_GAP_EVT_SEC_PARAMS_REQUEST by calling sd_ble_gap_sec_params_reply(), does that mean the SoftDevice will generate random keys for LTK? How can i get those keys after receiving the event BLE_GAP_EVT_AUTH_STATUS.

RE: Device Manager Query?

Petter Myhre — Thu, 12 Jan 2017 10:00:31 GMT

If distributed, the keys should be available in the ble_gap_sec_keyset_t struct you give a pointer to when you call sd_ble_gap_sec_params_reply().

The key should be available after you have received the BLE_GAP_EVT_AUTH_STATUS event.

Also see this MSC.