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Bluetooth: SSP: No MITM if required level is less than L3

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Regardless IO capabilities, clear MITM flag for pairing
initiator if the required security level is less than
BT_SECURITY_L3.

Signed-off-by: Lyle Zhu <lyle.zhu@nxp.com>
This commit is contained in:
Lyle Zhu 2024-09-20 18:57:31 +08:00 committed by Henrik Brix Andersen
parent a427497f03
commit 0e4561bed2
1 changed files with 8 additions and 0 deletions
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8
subsys/bluetooth/host/classic/ssp.c
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@ -631,6 +631,9 @@ void bt_hci_io_capa_resp(struct net_buf *buf)
/* Clear Bonding flag */
#define BT_HCI_SET_NO_BONDING(auth) ((auth) & 0x01)
/* Clear MITM flag */
#define BT_HCI_SET_NO_MITM(auth) ((auth) & (~0x01))
void bt_hci_io_capa_req(struct net_buf *buf)
{
struct bt_hci_evt_io_capa_req *evt = (void *)buf->data;
@ -675,6 +678,11 @@ void bt_hci_io_capa_req(struct net_buf *buf)
auth = BT_HCI_DEDICATED_BONDING;
}
}
if (conn->required_sec_level < BT_SECURITY_L3) {
/* If security level less than L3, clear MITM flag. */
auth = BT_HCI_SET_NO_MITM(auth);
}
} else {
auth = ssp_get_auth(conn);
}