Private Resolvable address, HOW TO GET PEER IRK

RE: Private Resolvable address, HOW TO GET PEER IRK

Hung Bui — Fri, 16 May 2014 15:13:55 GMT

@Jan: I just updated my answer in the thread :https://devzone.nordicsemi.com/index.php/what-mechanism-randomizes-the-ble-address-that-gets-hashed-with-the-irk

I am sorry for causing confusion.

RE: Private Resolvable address, HOW TO GET PEER IRK

Jan Krejsa — Thu, 15 May 2014 12:26:40 GMT

Thx very, as soon as it becomes clear, I am suggesting also to update this post:

devzone.nordicsemi.com/.../what-mechanism-randomizes-the-ble-address-that-gets-hashed-with-the-irk Jan

RE: Private Resolvable address, HOW TO GET PEER IRK

Ulrich Myhre — Thu, 15 May 2014 12:02:42 GMT

The links in the online documentation actually points from the S110 to the S310, so I might have given you some wrong information. I will remove my previous answer to avoid any confusion.

I don't think this it is possible at the moment to find your own IRK through the API for the S110, but this documentation issue should probably be fixed.

RE: Private Resolvable address, HOW TO GET PEER IRK

Jan Krejsa — Thu, 15 May 2014 11:44:49 GMT

Dear Ulrich,

thx for the answer. At first it little bit confused me, because I was trying for about an hour to find out and I was pretty sure I did check this event. I am probably missing some important information or knowledge.

Can you let me know in which header file and which stack + version is that defined? I did not find for S110 and for S120 there is something in function sd_ble_gap_sec_params_reply that fills something that leads to peer IRK.

In s110 periph_kex points to flags which keys has been exchenged...see:

ble_gap_sec_keys_t    periph_kex; (in ble_gap_evt_auth_status_t)

typedef struct
{
  uint8_t ltk       : 1;                        /**< Long Term Key. */
  uint8_t ediv_rand : 1;                        /**< Encrypted Diversifier and Random value. */
  uint8_t irk       : 1;                        /**< Identity Resolving Key. */
  uint8_t address   : 1;                        /**< Public or static random address. */
  uint8_t csrk      : 1;                        /**< Connection Signature Resolving Key. */
} ble_gap_sec_keys_t;

I believe I am missing something or looking completely wrong :-(

Thx for your help, Jan