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fix(bt/blurdoird): check Classic key before cross-key derivation

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This commit is contained in:
Jin Cheng
2025-10-11 14:10:21 +08:00
parent 1a27ef6d32
commit 9a22611e30
1 changed files with 8 additions and 1 deletions
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9
components/bt/host/bluedroid/stack/smp/smp_act.c
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@@ -1343,7 +1343,14 @@ void smp_key_distribution(tSMP_CB *p_cb, tSMP_INT_DATA *p_data)
/* state check to prevent re-entrant */
if (smp_get_state() == SMP_STATE_BOND_PENDING) {
if (p_cb->derive_lk) {
smp_derive_link_key_from_long_term_key(p_cb, NULL);
tBTM_SEC_DEV_REC* p_dev_rec = btm_find_dev(p_cb->pairing_bda);
if (!(p_dev_rec->sec_flags & BTM_SEC_LE_LINK_KEY_AUTHED) &&
(p_dev_rec->sec_flags & BTM_SEC_LINK_KEY_AUTHED)) {
SMP_TRACE_DEBUG("%s BREDR key is higher security than existing LE keys, "
"don't derive LK from LTK", __func__);
} else {
smp_derive_link_key_from_long_term_key(p_cb, NULL);
}
p_cb->derive_lk = FALSE;
}