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Merge branch 'bugfix/tkip_countermeasure_changes' into 'master'

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wpa_supplicant: Unicast key renew in TKIP mic failure

See merge request espressif/esp-idf!17819
This commit is contained in:
Kapil Gupta 2022-04-28 18:50:44 +08:00
commit f38e6cb4fa
2 changed files with 16 additions and 17 deletions
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27
components/wpa_supplicant/src/rsn_supp/wpa.c
View File

@ -44,7 +44,7 @@
#define WPA_4_4_HANDSHAKE_BIT (1<<13) #define WPA_4_4_HANDSHAKE_BIT (1<<13)
#define WPA_GROUP_HANDSHAKE_BIT (1<<14) #define WPA_GROUP_HANDSHAKE_BIT (1<<14)
struct wpa_sm gWpaSm; struct wpa_sm gWpaSm;
/* fix buf for tx for now */ /* fix buf for tx for now */
#define WPA_TX_MSG_BUFF_MAXLEN 200 #define WPA_TX_MSG_BUFF_MAXLEN 200
@ -318,9 +318,11 @@ static void wpa_sm_key_request(struct wpa_sm *sm, int error, int pairwise)
EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA; EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA;
key_info = WPA_KEY_INFO_REQUEST | ver; key_info = WPA_KEY_INFO_REQUEST | ver;
if (sm->ptk_set) if (sm->ptk_set)
key_info |= WPA_KEY_INFO_SECURE;
if (sm->ptk_set && mic_len)
key_info |= WPA_KEY_INFO_MIC; key_info |= WPA_KEY_INFO_MIC;
if (error) if (error)
key_info |= WPA_KEY_INFO_ERROR|WPA_KEY_INFO_SECURE; key_info |= WPA_KEY_INFO_ERROR;
if (pairwise) if (pairwise)
key_info |= WPA_KEY_INFO_KEY_TYPE; key_info |= WPA_KEY_INFO_KEY_TYPE;
@ -2336,9 +2338,9 @@ wpa_sm_set_key(struct install_key *key_sm, enum wpa_alg alg,
struct wpa_sm *sm = &gWpaSm; struct wpa_sm *sm = &gWpaSm;
/*gtk or ptk both need check countermeasures*/ /*gtk or ptk both need check countermeasures*/
if (alg == WIFI_WPA_ALG_TKIP && key_len == 32) { if (alg == WIFI_WPA_ALG_TKIP && key_idx == 0 && key_len == 32) {
/* Clear the MIC error counter when setting a new PTK. */ /* Clear the MIC error counter when setting a new PTK. */
key_sm->mic_errors_seen = 0; sm->mic_errors_seen = 0;
} }
key_sm->keys_cleared = 0; key_sm->keys_cleared = 0;
@ -2362,8 +2364,7 @@ wpa_sm_get_key(uint8_t *ifx, int *alg, u8 *addr, int *key_idx, u8 *key, size_t k
void wpa_supplicant_clr_countermeasures(u16 *pisunicast) void wpa_supplicant_clr_countermeasures(u16 *pisunicast)
{ {
struct wpa_sm *sm = &gWpaSm; struct wpa_sm *sm = &gWpaSm;
(sm->install_ptk).mic_errors_seen=0; sm->mic_errors_seen = 0;
(sm->install_gtk).mic_errors_seen=0;
ets_timer_done(&(sm->cm_timer)); ets_timer_done(&(sm->cm_timer));
wpa_printf(MSG_DEBUG, "WPA: TKIP countermeasures clean\n"); wpa_printf(MSG_DEBUG, "WPA: TKIP countermeasures clean\n");
} }
@ -2389,21 +2390,19 @@ void wpa_supplicant_stop_countermeasures(u16 *pisunicast)
int wpa_michael_mic_failure(u16 isunicast) int wpa_michael_mic_failure(u16 isunicast)
{ {
struct wpa_sm *sm = &gWpaSm; struct wpa_sm *sm = &gWpaSm;
int *pmic_errors_seen=(isunicast)? &((sm->install_ptk).mic_errors_seen) : &((sm->install_gtk).mic_errors_seen);
wpa_printf(MSG_DEBUG, "\nTKIP MIC failure occur\n"); wpa_printf(MSG_DEBUG, "TKIP MIC failure occur");
/*both unicast and multicast mic_errors_seen need statistics*/ if (sm->mic_errors_seen) {
if ((sm->install_ptk).mic_errors_seen + (sm->install_gtk).mic_errors_seen) {
/* Send the new MIC error report immediately since we are going /* Send the new MIC error report immediately since we are going
* to start countermeasures and AP better do the same. * to start countermeasures and AP better do the same.
*/ */
wpa_sm_set_state(WPA_TKIP_COUNTERMEASURES); wpa_sm_set_state(WPA_TKIP_COUNTERMEASURES);
wpa_sm_key_request(sm, 1, 0); wpa_sm_key_request(sm, 1, isunicast);
/* initialize countermeasures */ /* initialize countermeasures */
sm->countermeasures = 1; sm->countermeasures = 1;
wpa_printf(MSG_DEBUG, "TKIP countermeasures started\n"); wpa_printf(MSG_DEBUG, "TKIP countermeasures started");
/* /*
* Need to wait for completion of request frame. We do not get * Need to wait for completion of request frame. We do not get
@ -2422,9 +2421,9 @@ int wpa_michael_mic_failure(u16 isunicast)
/* TODO: mark the AP rejected for 60 second. STA is /* TODO: mark the AP rejected for 60 second. STA is
* allowed to associate with another AP.. */ * allowed to associate with another AP.. */
} else { } else {
*pmic_errors_seen=(*pmic_errors_seen)+1; sm->mic_errors_seen++;
wpa_sm_set_state(WPA_MIC_FAILURE); wpa_sm_set_state(WPA_MIC_FAILURE);
wpa_sm_key_request(sm, 1, 0); wpa_sm_key_request(sm, 1, isunicast);
/*start 60sec counter to monitor whether next mic_failure occur in this period, or clear mic_errors_seen*/ /*start 60sec counter to monitor whether next mic_failure occur in this period, or clear mic_errors_seen*/
ets_timer_disarm(&(sm->cm_timer)); ets_timer_disarm(&(sm->cm_timer));
ets_timer_done(&(sm->cm_timer)); ets_timer_done(&(sm->cm_timer));

2
components/wpa_supplicant/src/rsn_supp/wpa_i.h
View File

@ -16,7 +16,6 @@
#define WPA_I_H #define WPA_I_H
struct install_key { struct install_key {
int mic_errors_seen; /* Michael MIC errors with the current PTK */
int keys_cleared; int keys_cleared;
enum wpa_alg alg; enum wpa_alg alg;
u8 addr[ETH_ALEN]; u8 addr[ETH_ALEN];
@ -75,6 +74,7 @@ struct wpa_sm {
struct install_key install_ptk; struct install_key install_ptk;
struct install_key install_gtk; struct install_key install_gtk;
int mic_errors_seen; /* Michael MIC errors with the current PTK */
void (* sendto) (void *buffer, uint16_t len); void (* sendto) (void *buffer, uint16_t len);
void (*config_assoc_ie) (u8 proto, u8 *assoc_buf, u32 assoc_wpa_ie_len); void (*config_assoc_ie) (u8 proto, u8 *assoc_buf, u32 assoc_wpa_ie_len);