mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-26 17:01:14 +00:00
7bed9bf10f
Fixes this security problem: * SAE/EAP-pwd side-channel attack update https://w1.fi/security/2019-6/sae-eap-pwd-side-channel-attack-update.txt Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
45 lines
1.8 KiB
Diff
45 lines
1.8 KiB
Diff
From 558518ed63202e5358116ab7e0afd5e85490f2ef Mon Sep 17 00:00:00 2001
|
|
From: Jouni Malinen <j@w1.fi>
|
|
Date: Sat, 27 Jul 2019 23:19:17 +0300
|
|
Subject: [PATCH 6/6] dragonfly: Disable use of groups using Brainpool curves
|
|
|
|
Disable groups that use Brainpool curves for now since they leak more
|
|
timing information due to the prime not being close to a power of two.
|
|
This removes use of groups 28, 29, and 30 from SAE and EAP-pwd.
|
|
|
|
Signed-off-by: Jouni Malinen <j@w1.fi>
|
|
(cherry picked from commit 876c5eaa6dae1a87a17603fc489a44c29eedc2e3)
|
|
---
|
|
src/common/sae.c | 6 ++++--
|
|
src/eap_common/eap_pwd_common.c | 3 +--
|
|
2 files changed, 5 insertions(+), 4 deletions(-)
|
|
|
|
--- a/src/common/sae.c
|
|
+++ b/src/common/sae.c
|
|
@@ -28,9 +28,11 @@ static int sae_suitable_group(int group)
|
|
* purposes: FFC groups whose prime is >= 3072 bits and ECC groups
|
|
* defined over a prime field whose prime is >= 256 bits. Furthermore,
|
|
* ECC groups defined over a characteristic 2 finite field and ECC
|
|
- * groups with a co-factor greater than 1 are not suitable. */
|
|
+ * groups with a co-factor greater than 1 are not suitable. Disable
|
|
+ * groups that use Brainpool curves as well for now since they leak more
|
|
+ * timing information due to the prime not being close to a power of
|
|
+ * two. */
|
|
return group == 19 || group == 20 || group == 21 ||
|
|
- group == 28 || group == 29 || group == 30 ||
|
|
group == 15 || group == 16 || group == 17 || group == 18;
|
|
#endif /* CONFIG_TESTING_OPTIONS */
|
|
}
|
|
--- a/src/eap_common/eap_pwd_common.c
|
|
+++ b/src/eap_common/eap_pwd_common.c
|
|
@@ -89,8 +89,7 @@ static int eap_pwd_suitable_group(u16 nu
|
|
{
|
|
/* Do not allow ECC groups with prime under 256 bits based on guidance
|
|
* for the similar design in SAE. */
|
|
- return num == 19 || num == 20 || num == 21 ||
|
|
- num == 28 || num == 29 || num == 30;
|
|
+ return num == 19 || num == 20 || num == 21;
|
|
}
|
|
|
|
|