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Commit 4da8aad8 authored by Josh Wu's avatar Josh Wu
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SMP: Set pairing parameters for CTKD by properties 

These configurations were in bt_stack.conf and shared between LE and
CTKD(SMP over BR/EDR). Devices may need different parameters for these 2
modes and to configure them, so we need properties to control them.

Bug: 269773251
Test: net_test_stack_btm
Test: Avatar - test CTKD over BR/EDR on 2 directions
Change-Id: Iaf250e12cc58abb8df8ebad32c6593ebcd974ee8
parent 78fcd2e0

system/stack/btm/btm_ble.cc

+28 −5
Original line number Diff line number Diff line
@@ -64,6 +64,22 @@ extern void gatt_notify_phy_updated(tGATT_STATUS status, uint16_t handle, 
#define PROPERTY_BLE_PRIVACY_ENABLED "bluetooth.core.gap.le.privacy.enabled"

#endif



// Pairing parameters defined in Vol 3, Part H, Chapter 3.5.1 - 3.5.2

// All present in the exact decimal values, not hex

// Ex: bluetooth.core.smp.le.ctkd.initiator_key_distribution 15(0x0f)

static const char kPropertyCtkdAuthRequest[] =

    "bluetooth.core.smp.le.ctkd.auth_request";

static const char kPropertyCtkdIoCapabilities[] =

    "bluetooth.core.smp.le.ctkd.io_capabilities";

// Vol 3, Part H, Chapter 3.6.1, Figure 3.11

// |EncKey(1)|IdKey(1)|SignKey(1)|LinkKey(1)|Reserved(4)|

static const char kPropertyCtkdInitiatorKeyDistribution[] =

    "bluetooth.core.smp.le.ctkd.initiator_key_distribution";

static const char kPropertyCtkdResponderKeyDistribution[] =

    "bluetooth.core.smp.le.ctkd.responder_key_distribution";

static const char kPropertyCtkdMaxKeySize[] =

    "bluetooth.core.smp.le.ctkd.max_key_size";



/******************************************************************************/

/* External Function to be called by other modules                            */

/******************************************************************************/
@@ -1671,11 +1687,18 @@ uint8_t btm_ble_br_keys_req(tBTM_SEC_DEV_REC* p_dev_rec, 
                            tBTM_LE_IO_REQ* p_data) {

  uint8_t callback_rc = BTM_SUCCESS;

  BTM_TRACE_DEBUG("%s", __func__);

  if (btm_cb.api.p_le_callback) {

    /* the callback function implementation may change the IO capability... */

    callback_rc = (*btm_cb.api.p_le_callback)(

        BTM_LE_IO_REQ_EVT, p_dev_rec->bd_addr, (tBTM_LE_EVT_DATA*)p_data);

  }

  p_data->io_cap =

      osi_property_get_int32(kPropertyCtkdIoCapabilities, BTM_IO_CAP_UNKNOWN);

  p_data->auth_req = osi_property_get_int32(kPropertyCtkdAuthRequest,

                                            BTM_LE_AUTH_REQ_SC_MITM_BOND);

  p_data->init_keys = osi_property_get_int32(

      kPropertyCtkdInitiatorKeyDistribution, SMP_BR_SEC_DEFAULT_KEY);

  p_data->resp_keys = osi_property_get_int32(

      kPropertyCtkdResponderKeyDistribution, SMP_BR_SEC_DEFAULT_KEY);

  p_data->max_key_size =

      osi_property_get_int32(kPropertyCtkdMaxKeySize, BTM_BLE_MAX_KEY_SIZE);

  // No OOB data for BR/EDR

  p_data->oob_data = false;



  return callback_rc;

}