mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-27 01:11:14 +00:00
57 lines
1.6 KiB
Diff
57 lines
1.6 KiB
Diff
|
From: Jouni Malinen <j@w1.fi>
|
||
|
|
Date: Sun, 1 Oct 2017 12:32:57 +0300
|
||
|
|
Subject: [PATCH] Fix PTK rekeying to generate a new ANonce
|
||
|
|
|
||
|
|
The Authenticator state machine path for PTK rekeying ended up bypassing
|
||
|
|
the AUTHENTICATION2 state where a new ANonce is generated when going
|
||
|
|
directly to the PTKSTART state since there is no need to try to
|
||
|
|
determine the PMK again in such a case. This is far from ideal since the
|
||
|
|
new PTK would depend on a new nonce only from the supplicant.
|
||
|
|
|
||
|
|
Fix this by generating a new ANonce when moving to the PTKSTART state
|
||
|
|
for the purpose of starting new 4-way handshake to rekey PTK.
|
||
|
|
|
||
|
|
Signed-off-by: Jouni Malinen <j@w1.fi>
|
||
|
|
---
|
||
|
|
|
||
|
|
--- a/src/ap/wpa_auth.c
|
||
|
|
+++ b/src/ap/wpa_auth.c
|
||
|
|
@@ -1951,6 +1951,21 @@ SM_STATE(WPA_PTK, AUTHENTICATION2)
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
+static int wpa_auth_sm_ptk_update(struct wpa_state_machine *sm)
|
||
|
|
+{
|
||
|
|
+ if (random_get_bytes(sm->ANonce, WPA_NONCE_LEN)) {
|
||
|
|
+ wpa_printf(MSG_ERROR,
|
||
|
|
+ "WPA: Failed to get random data for ANonce");
|
||
|
|
+ sm->Disconnect = TRUE;
|
||
|
|
+ return -1;
|
||
|
|
+ }
|
||
|
|
+ wpa_hexdump(MSG_DEBUG, "WPA: Assign new ANonce", sm->ANonce,
|
||
|
|
+ WPA_NONCE_LEN);
|
||
|
|
+ sm->TimeoutCtr = 0;
|
||
|
|
+ return 0;
|
||
|
|
+}
|
||
|
|
+
|
||
|
|
+
|
||
|
|
SM_STATE(WPA_PTK, INITPMK)
|
||
|
|
{
|
||
|
|
u8 msk[2 * PMK_LEN];
|
||
|
|
@@ -3116,9 +3131,12 @@ SM_STEP(WPA_PTK)
|
||
|
|
SM_ENTER(WPA_PTK, AUTHENTICATION);
|
||
|
|
else if (sm->ReAuthenticationRequest)
|
||
|
|
SM_ENTER(WPA_PTK, AUTHENTICATION2);
|
||
|
|
- else if (sm->PTKRequest)
|
||
|
|
- SM_ENTER(WPA_PTK, PTKSTART);
|
||
|
|
- else switch (sm->wpa_ptk_state) {
|
||
|
|
+ else if (sm->PTKRequest) {
|
||
|
|
+ if (wpa_auth_sm_ptk_update(sm) < 0)
|
||
|
|
+ SM_ENTER(WPA_PTK, DISCONNECTED);
|
||
|
|
+ else
|
||
|
|
+ SM_ENTER(WPA_PTK, PTKSTART);
|
||
|
|
+ } else switch (sm->wpa_ptk_state) {
|
||
|
|
case WPA_PTK_INITIALIZE:
|
||
|
|
break;
|
||
|
|
case WPA_PTK_DISCONNECT:
|