mirror of
https://github.com/Divested-Mobile/DivestOS-Build.git
synced 2024-12-23 22:49:28 -05:00
e7b390d7e6
https://review.lineageos.org/q/topic:%22n-asb-2023-06%22 Signed-off-by: Tad <tad@spotco.us>
85 lines
3.5 KiB
Diff
85 lines
3.5 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
|
|
From: Brian Delwiche <delwiche@google.com>
|
|
Date: Tue, 21 Mar 2023 22:39:16 +0000
|
|
Subject: [PATCH] Revert "Revert "Fix wrong BR/EDR link key downgrades
|
|
(P_256->P_192)""
|
|
|
|
This reverts commit d733c86cbc06ce0ec72216b9d41e172d1939c46f.
|
|
|
|
Function btm_sec_encrypt_change() is called at most places
|
|
with argument "encr_enable" treated as bool and not as per
|
|
(tHCI_ENCRYPT_MODE = 0/1/2) expected by the function. The
|
|
function has special handling for "encr_enable=1" to downgrade
|
|
the link key type for BR/EDR case. This gets executed even
|
|
when the caller/context did not mean/expect so. It appears
|
|
this handling in btm_sec_encrypt_change() is not necessary and
|
|
is removed by this commit to prevent accidental execution of it.
|
|
|
|
Test: Verified re-pairing with an iPhone works fine now
|
|
|
|
Issue Reproduction Steps:
|
|
1. Enable Bluetooth Hotspot on Android device (DUT).
|
|
2. Pair and connect an iPhone to DUT.
|
|
3. Forget this pairing on DUT.
|
|
4. On iPhone settings, click on old DUT's paired entry to connect.
|
|
5. iPhone notifies to click 'Forget Device' and try fresh pairing.
|
|
6. On iPhone, after doing 'Forget Device', discover DUT again.
|
|
7. Attempt pairing to DUT by clicking on discovered DUT entry.
|
|
Pairing will be unsuccessful.
|
|
|
|
Issue Cause:
|
|
During re-pairing, DUT is seen to downgrade
|
|
BR/EDR link key unexpectedly from link key type 0x8
|
|
(BTM_LKEY_TYPE_AUTH_COMB_P_256) to 0x5 (BTM_LKEY_TYPE_AUTH_COMB).
|
|
|
|
Log snippet (re-pairing time):
|
|
btm_sec_link_key_notification set new_encr_key_256 to 1
|
|
btif_dm_auth_cmpl_evt: Storing link key. key_type=0x8, bond_type=1
|
|
btm_sec_encrypt_change new_encr_key_256 is 1
|
|
--On DUT, HCI_Encryption_Key_Refresh_Complete event noticed---
|
|
btm_sec_encrypt_change new_encr_key_256 is 0
|
|
updated link key type to 5
|
|
btif_dm_auth_cmpl_evt: Storing link key. key_type=0x5, bond_type=1
|
|
|
|
This is a backport of the following patch: aosp/1890096
|
|
|
|
Bug: 258834033
|
|
|
|
Reason for revert: Reinstate original change for QPR
|
|
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:56891eedc68c86b40977191dad28d65ebf86a94f)
|
|
Merged-In: Iba0c220b82bcf6b15368762b7052a3987ccbc0c6
|
|
Change-Id: Iba0c220b82bcf6b15368762b7052a3987ccbc0c6
|
|
---
|
|
stack/btm/btm_sec.c | 18 ------------------
|
|
1 file changed, 18 deletions(-)
|
|
|
|
diff --git a/stack/btm/btm_sec.c b/stack/btm/btm_sec.c
|
|
index 175fefeae..f8884b917 100644
|
|
--- a/stack/btm/btm_sec.c
|
|
+++ b/stack/btm/btm_sec.c
|
|
@@ -4348,24 +4348,6 @@ void btm_sec_encrypt_change (UINT16 handle, UINT8 status, UINT8 encr_enable)
|
|
}
|
|
}
|
|
}
|
|
- else
|
|
- {
|
|
- // BR/EDR is successfully encrypted. Correct LK type if needed
|
|
- // (BR/EDR LK derived from LE LTK was used for encryption)
|
|
- if ((encr_enable == 1) && /* encryption is ON for SSP */
|
|
- /* LK type is for BR/EDR SC */
|
|
- (p_dev_rec->link_key_type == BTM_LKEY_TYPE_UNAUTH_COMB_P_256 ||
|
|
- p_dev_rec->link_key_type == BTM_LKEY_TYPE_AUTH_COMB_P_256))
|
|
- {
|
|
- if (p_dev_rec->link_key_type == BTM_LKEY_TYPE_UNAUTH_COMB_P_256)
|
|
- p_dev_rec->link_key_type = BTM_LKEY_TYPE_UNAUTH_COMB;
|
|
- else /* BTM_LKEY_TYPE_AUTH_COMB_P_256 */
|
|
- p_dev_rec->link_key_type = BTM_LKEY_TYPE_AUTH_COMB;
|
|
-
|
|
- BTM_TRACE_DEBUG("updated link key type to %d", p_dev_rec->link_key_type);
|
|
- btm_send_link_key_notif(p_dev_rec);
|
|
- }
|
|
- }
|
|
}
|
|
#else
|
|
btm_sec_check_pending_enc_req (p_dev_rec, BT_TRANSPORT_BR_EDR, encr_enable);
|