mirror of
https://github.com/Divested-Mobile/DivestOS-Build.git
synced 2024-06-26 06:32:28 +00:00
70 lines
2.2 KiB
Diff
70 lines
2.2 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
|
|
From: Brian Delwiche <delwiche@google.com>
|
|
Date: Tue, 3 Oct 2023 21:27:49 +0000
|
|
Subject: [PATCH] Fix timing attack in BTM_BleVerifySignature
|
|
|
|
BTM_BleVerifySignature uses a stock memcmp, allowing signature contents
|
|
to be deduced through a side-channel attack.
|
|
|
|
Change to CRYPTO_memcmp, which is hardened against this attack, to
|
|
eliminate this attack.
|
|
|
|
Bug: 274478807
|
|
Test: atest bluetooth_test_gd_unit
|
|
Tag: #security
|
|
Ignore-AOSP-First: Security
|
|
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:fcd1c44f7c4bf431dd6a6902d74c045174bd00ce)
|
|
Merged-In: I41a9b586d663d2ad4694222ae451d2d30a428a3c
|
|
Change-Id: I41a9b586d663d2ad4694222ae451d2d30a428a3c
|
|
---
|
|
main/Android.bp | 1 +
|
|
stack/Android.bp | 1 +
|
|
stack/btm/btm_ble.cc | 3 ++-
|
|
3 files changed, 4 insertions(+), 1 deletion(-)
|
|
|
|
diff --git a/main/Android.bp b/main/Android.bp
|
|
index 9dc5a9866..35df9e6d4 100644
|
|
--- a/main/Android.bp
|
|
+++ b/main/Android.bp
|
|
@@ -48,6 +48,7 @@ cc_library_shared {
|
|
"libutils",
|
|
"libtinyxml2",
|
|
"libz",
|
|
+ "libcrypto",
|
|
],
|
|
static_libs: [
|
|
"libbt-sbc-decoder",
|
|
diff --git a/stack/Android.bp b/stack/Android.bp
|
|
index 5cb567895..dd0f934f3 100644
|
|
--- a/stack/Android.bp
|
|
+++ b/stack/Android.bp
|
|
@@ -176,6 +176,7 @@ cc_library_static {
|
|
shared_libs: [
|
|
"libcutils",
|
|
"liblog",
|
|
+ "libcrypto",
|
|
],
|
|
required: [
|
|
"libldacBT_enc",
|
|
diff --git a/stack/btm/btm_ble.cc b/stack/btm/btm_ble.cc
|
|
index 3a67f75ba..b8dfba239 100644
|
|
--- a/stack/btm/btm_ble.cc
|
|
+++ b/stack/btm/btm_ble.cc
|
|
@@ -41,6 +41,7 @@
|
|
#include "hcimsgs.h"
|
|
#include "log/log.h"
|
|
#include "l2c_int.h"
|
|
+#include "openssl/mem.h"
|
|
#include "osi/include/log.h"
|
|
#include "osi/include/osi.h"
|
|
#include "smp_api.h"
|
|
@@ -2235,7 +2236,7 @@ bool BTM_BleVerifySignature(const RawAddress& bd_addr, uint8_t* p_orig,
|
|
|
|
if (aes_cipher_msg_auth_code(p_rec->ble.keys.pcsrk, p_orig, len,
|
|
BTM_CMAC_TLEN_SIZE, p_mac)) {
|
|
- if (memcmp(p_mac, p_comp, BTM_CMAC_TLEN_SIZE) == 0) {
|
|
+ if (CRYPTO_memcmp(p_mac, p_comp, BTM_CMAC_TLEN_SIZE) == 0) {
|
|
btm_ble_increment_sign_ctr(bd_addr, false);
|
|
verified = true;
|
|
}
|