Commit 56439da7 authored Nov 05, 2019 by IHLHO KIM Committed by Jakub Pawlowski Mar 13, 2020

Save reversed BR/EDR link key derived from LE LTK

Authentication is failed between Android Q and Android P or earlier when derived link key is used.

Repro steps:
1. Try to LE connect & pair(LE secure connection) with Android P device from Android Q device
2. Try to connect PAN from Android Q device to Android P device
3. Connection failed

This issue is caused by the following change.
https://android.googlesource.com/platform/system/bt/+/fc22b0f43849362bdd958cc518d4e4e54b654c8c

This fix just reverts removed line from the previous change.
Bug: 143940249
Change-Id: I5d18cdd76b6c436dad010caf514ab0d78997f091

parent 175fdfd7

system/stack/smp/smp_keys.cc

+2 −1

Original line number	Diff line number	Diff line
		@@ -987,7 +987,8 @@ bool smp_calculate_link_key_from_long_term_key(tSMP_CB* p_cb) {

		link_key_type += BTM_LTK_DERIVED_LKEY_OFFSET;

		Octet16 notif_link_key = link_key;
		Octet16 notif_link_key;
		std::reverse_copy(link_key.begin(), link_key.end(), notif_link_key.begin());
		btm_sec_link_key_notification(bda_for_lk, notif_link_key, link_key_type);

		SMP_TRACE_EVENT("%s is completed", __func__);