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/*
* WPA Supplicant - WPA state machine and EAPOL-Key processing
* Copyright (c) 2003-2010, Jouni Malinen <j@w1.fi>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* Alternatively, this software may be distributed under the terms of BSD
* license.
*
* See README and COPYING for more details.
*/
#include "utils/includes.h"
#include "utils/common.h"
#include "utils/eloop.h"
#include "rsn_supp/wpa.h"
#include "rsn_supp/pmksa_cache.h"
#include "rsn_supp/wpa_i.h"
#include "common/eapol_common.h"
#include "common/ieee802_11_defs.h"
#include "rsn_supp/wpa_ie.h"
#include "esp_wpas_glue.h"
#include "esp_wifi_driver.h"
#include "crypto/crypto.h"
#include "crypto/sha1.h"
#include "crypto/aes_wrap.h"
#include "crypto/ccmp.h"
#include "crypto/sha256.h"
#include "esp_rom_sys.h"
#include "common/bss.h"
#include "esp_common_i.h"
#include "esp_owe_i.h"
#include "common/sae.h"
#include "esp_eap_client_i.h"
#include "esp_wpa3_i.h"
/**
* eapol_sm_notify_eap_success - Notification of external EAP success trigger
* @sm: Pointer to EAPOL state machine allocated with eapol_sm_init()
* @success: %TRUE = set success, %FALSE = clear success
*
* Notify the EAPOL state machine that external event has forced EAP state to
* success (success = %TRUE). This can be cleared by setting success = %FALSE.
*
* This function is called to update EAP state when WPA-PSK key handshake has
* been completed successfully since WPA-PSK does not use EAP state machine.
*/
#define WPA_4_4_HANDSHAKE_BIT (1<<13)
#define WPA_GROUP_HANDSHAKE_BIT (1<<14)
struct wpa_sm gWpaSm;
/* fix buf for tx for now */
#define WPA_TX_MSG_BUFF_MAXLEN 200
#define MIN_DH_LEN(len) (len < 4)
#define ASSOC_IE_LEN 24 + 2 + PMKID_LEN + RSN_SELECTOR_LEN
#define MAX_EAPOL_RETRIES 3
u8 assoc_ie_buf[ASSOC_IE_LEN+2];
void set_assoc_ie(u8 * assoc_buf);
static int wpa_sm_get_key(uint8_t *ifx, int *alg, u8 *addr, int *key_idx, u8 *key, size_t key_len, enum key_flag key_flag);
void wpa_set_passphrase(char * passphrase, u8 *ssid, size_t ssid_len);
void wpa_sm_set_pmk_from_pmksa(struct wpa_sm *sm);
static bool wpa_supplicant_gtk_in_use(struct wpa_sm *sm, struct wpa_gtk_data *gd);
void wpa_supplicant_stop_countermeasures(void *data, void *user_ctx);
static inline enum wpa_states wpa_sm_get_state(struct wpa_sm *sm)
{
return sm->wpa_state;;
}
static inline void wpa_sm_cancel_auth_timeout(struct wpa_sm *sm)
{
}
void eapol_sm_notify_eap_success(Boolean success)
{
}
wifi_cipher_type_t cipher_type_map_supp_to_public(unsigned wpa_cipher)
{
switch (wpa_cipher) {
case WPA_CIPHER_NONE:
return WIFI_CIPHER_TYPE_NONE;
case WPA_CIPHER_WEP40:
return WIFI_CIPHER_TYPE_WEP40;
case WPA_CIPHER_WEP104:
return WIFI_CIPHER_TYPE_WEP104;
case WPA_CIPHER_TKIP:
return WIFI_CIPHER_TYPE_TKIP;
case WPA_CIPHER_CCMP:
return WIFI_CIPHER_TYPE_CCMP;
case WPA_CIPHER_CCMP|WPA_CIPHER_TKIP:
return WIFI_CIPHER_TYPE_TKIP_CCMP;
case WPA_CIPHER_AES_128_CMAC:
return WIFI_CIPHER_TYPE_AES_CMAC128;
case WPA_CIPHER_SMS4:
return WIFI_CIPHER_TYPE_SMS4;
case WPA_CIPHER_GCMP:
return WIFI_CIPHER_TYPE_GCMP;
case WPA_CIPHER_GCMP_256:
return WIFI_CIPHER_TYPE_GCMP256;
default:
return WIFI_CIPHER_TYPE_UNKNOWN;
}
}
unsigned cipher_type_map_public_to_supp(wifi_cipher_type_t cipher)
{
switch (cipher) {
case WIFI_CIPHER_TYPE_NONE:
return WPA_CIPHER_NONE;
case WIFI_CIPHER_TYPE_WEP40:
return WPA_CIPHER_WEP40;
case WIFI_CIPHER_TYPE_WEP104:
return WPA_CIPHER_WEP104;
case WIFI_CIPHER_TYPE_TKIP:
return WPA_CIPHER_TKIP;
case WIFI_CIPHER_TYPE_CCMP:
return WPA_CIPHER_CCMP;
#ifdef CONFIG_GCMP
case WIFI_CIPHER_TYPE_GCMP:
return WPA_CIPHER_GCMP;
case WIFI_CIPHER_TYPE_GCMP256:
return WPA_CIPHER_GCMP_256;
#endif
case WIFI_CIPHER_TYPE_TKIP_CCMP:
return WPA_CIPHER_CCMP|WPA_CIPHER_TKIP;
case WIFI_CIPHER_TYPE_AES_CMAC128:
return WPA_CIPHER_AES_128_CMAC;
#ifdef CONFIG_GMAC
case WIFI_CIPHER_TYPE_AES_GMAC128:
return WPA_CIPHER_BIP_GMAC_128;
case WIFI_CIPHER_TYPE_AES_GMAC256:
return WPA_CIPHER_BIP_GMAC_256;
#endif
case WIFI_CIPHER_TYPE_SMS4:
return WPA_CIPHER_SMS4;
default:
return WPA_CIPHER_NONE;
}
}
#ifdef CONFIG_ESP_WIFI_ENTERPRISE_SUPPORT
static bool is_wpa2_enterprise_connection(void)
{
uint8_t authmode;
if (esp_wifi_sta_prof_is_wpa2_internal()) {
authmode = esp_wifi_sta_get_prof_authmode_internal();
if ((authmode == WPA2_AUTH_ENT) ||
(authmode == WPA2_AUTH_ENT_SHA256) ||
(authmode == WPA2_AUTH_ENT_SHA384_SUITE_B)) {
return true;
}
}
return false;
}
#endif
const u8 * wpa_sm_get_auth_addr(struct wpa_sm *sm)
{
return sm->bssid;
}
/*
* wpa_sm_ether_send - Send Ethernet frame
* @wpa_s: Pointer to wpa_supplicant data
* @dest: Destination MAC address
* @proto: Ethertype in host byte order
* @buf: Frame payload starting from IEEE 802.1X header
* @len: Frame payload length
* Returns: >=0 on success, <0 on failure
*/
static inline int wpa_sm_ether_send(struct wpa_sm *sm, const u8 *dest, u16 proto,
const u8 *data, size_t data_len)
{
return wpa_ether_send(sm, dest, proto, data, data_len);
}
/**
* wpa_eapol_key_send - Send WPA/RSN EAPOL-Key message
* @sm: Pointer to WPA state machine data from wpa_sm_init()
* @kck: Key Confirmation Key (KCK, part of PTK)
* @kck_len: KCK length in octets
* @ver: Version field from Key Info
* @dest: Destination address for the frame
* @proto: Ethertype (usually ETH_P_EAPOL)
* @msg: EAPOL-Key message
* @msg_len: Length of message
* @key_mic: Pointer to the buffer to which the EAPOL-Key MIC is written
*/
int wpa_eapol_key_send(struct wpa_sm *sm, const u8 *kck, size_t kck_len,
int ver, const u8 *dest, u16 proto,
u8 *msg, size_t msg_len, u8 *key_mic)
{
int ret = -1;
if (is_zero_ether_addr(dest) && is_zero_ether_addr(sm->bssid)) {
#ifndef ESP_SUPPLICANT
/*
* Association event was not yet received; try to fetch
* BSSID from the driver.
*/
if (wpa_sm_get_bssid(sm, sm->bssid) < 0) {
wpa_printf(MSG_DEBUG, "WPA: Failed to read BSSID for "
"EAPOL-Key destination address");
} else {
dest = sm->bssid;
wpa_printf(MSG_DEBUG, "WPA: Use BSSID (" MACSTR
") as the destination for EAPOL-Key",
MAC2STR(dest));
}
#else
return ret;
#endif
}
if (key_mic &&
wpa_eapol_key_mic(kck, kck_len, sm->key_mgmt, ver, msg, msg_len,
key_mic)) {
wpa_msg(NULL, MSG_ERROR,
"WPA: Failed to generate EAPOL-Key version %d key_mgmt 0x%x MIC",
ver, sm->key_mgmt);
goto out;
}
wpa_hexdump_key(MSG_DEBUG, "WPA: KCK", kck, kck_len);
wpa_hexdump(MSG_DEBUG, "WPA: Derived Key MIC", key_mic, wpa_mic_len(sm->key_mgmt, sm->pmk_len));
wpa_hexdump(MSG_MSGDUMP, "WPA: TX EAPOL-Key", msg, msg_len);
return wpa_sm_ether_send(sm, dest, proto, msg, msg_len);
out:
return ret;
}
/**
* wpa_sm_key_request - Send EAPOL-Key Request
* @sm: Pointer to WPA state machine data from wpa_sm_init()
* @error: Indicate whether this is an Michael MIC error report
* @pairwise: 1 = error report for pairwise packet, 0 = for group packet
*
* Send an EAPOL-Key Request to the current authenticator. This function is
* used to request rekeying and it is usually called when a local Michael MIC
* failure is detected.
*/
static void wpa_sm_key_request(struct wpa_sm *sm, int error, int pairwise)
{
size_t mic_len, hdrlen, rlen;
struct wpa_eapol_key *reply;
struct wpa_eapol_key_192 *reply192;
int key_info, ver;
u8 *rbuf, *key_mic;
if (wpa_use_akm_defined(sm->key_mgmt))
ver = WPA_KEY_INFO_TYPE_AKM_DEFINED;
else if (wpa_key_mgmt_ft(sm->key_mgmt) || wpa_key_mgmt_sha256(sm->key_mgmt))
ver = WPA_KEY_INFO_TYPE_AES_128_CMAC;
else if (sm->pairwise_cipher != WPA_CIPHER_TKIP)
ver = WPA_KEY_INFO_TYPE_HMAC_SHA1_AES;
else
ver = WPA_KEY_INFO_TYPE_HMAC_MD5_RC4;
mic_len = wpa_mic_len(sm->key_mgmt, sm->pmk_len);
hdrlen = mic_len == 24 ? sizeof(*reply192) : sizeof(*reply);
rbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY, NULL,
hdrlen, &rlen, (void *) &reply);
if (rbuf == NULL)
return;
reply192 = (struct wpa_eapol_key_192 *) reply;
reply->type = sm->proto == WPA_PROTO_RSN ?
EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA;
key_info = WPA_KEY_INFO_REQUEST | ver;
if (sm->ptk_set)
key_info |= WPA_KEY_INFO_SECURE;
if (sm->ptk_set && mic_len)
key_info |= WPA_KEY_INFO_MIC;
if (error)
key_info |= WPA_KEY_INFO_ERROR;
if (pairwise)
key_info |= WPA_KEY_INFO_KEY_TYPE;
WPA_PUT_BE16(reply->key_info, key_info);
WPA_PUT_BE16(reply->key_length, 0);
os_memcpy(reply->replay_counter, sm->request_counter,
WPA_REPLAY_COUNTER_LEN);
inc_byte_array(sm->request_counter, WPA_REPLAY_COUNTER_LEN);
if (mic_len == 24)
WPA_PUT_BE16(reply192->key_data_length, 0);
else
WPA_PUT_BE16(reply->key_data_length, 0);
if (!(key_info & WPA_KEY_INFO_MIC))
key_mic = NULL;
else
key_mic = reply192->key_mic; /* same offset in reply */
wpa_printf(MSG_DEBUG, "WPA: Sending EAPOL-Key Request (error=%d "
"pairwise=%d ptk_set=%d len=%lu)",
error, pairwise, sm->ptk_set, (unsigned long) rlen);
wpa_eapol_key_send(sm, sm->ptk.kck, sm->ptk.kck_len, ver, wpa_sm_get_auth_addr(sm),
ETH_P_EAPOL, rbuf, rlen, key_mic);
wpa_sm_free_eapol(rbuf);
}
static void wpa_sm_pmksa_free_cb(struct rsn_pmksa_cache_entry *entry,
void *ctx, enum pmksa_free_reason reason)
{
struct wpa_sm *sm = ctx;
int deauth = 0;
wpa_printf( MSG_DEBUG, "RSN: PMKSA cache entry free_cb: "
MACSTR " reason=%d", MAC2STR(entry->aa), reason);
if (sm->cur_pmksa == entry) {
wpa_printf( MSG_DEBUG,
"RSN: %s current PMKSA entry",
reason == PMKSA_REPLACE ? "replaced" : "removed");
pmksa_cache_clear_current(sm);
/*
* If an entry is simply being replaced, there's no need to
* deauthenticate because it will be immediately re-added.
* This happens when EAP authentication is completed again
* (reauth or failed PMKSA caching attempt).
* */
if (reason != PMKSA_REPLACE)
deauth = 1;
}
if (reason == PMKSA_EXPIRE &&
(sm->pmk_len == entry->pmk_len &&
os_memcmp(sm->pmk, entry->pmk, sm->pmk_len) == 0)) {
wpa_printf( MSG_DEBUG,
"RSN: deauthenticating due to expired PMK");
pmksa_cache_clear_current(sm);
deauth = 1;
}
if (deauth) {
os_memset(sm->pmk, 0, sizeof(sm->pmk));
wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED);
}
}
static int wpa_supplicant_get_pmk(struct wpa_sm *sm,
const unsigned char *src_addr,
const u8 *pmkid)
{
int abort_cached = 0;
if (pmkid && !sm->cur_pmksa) {
/* When using drivers that generate RSN IE, wpa_supplicant may
* not have enough time to get the association information
* event before receiving this 1/4 message, so try to find a
* matching PMKSA cache entry here. */
sm->cur_pmksa = pmksa_cache_get(sm->pmksa, src_addr, pmkid,
NULL);
if (sm->cur_pmksa) {
wpa_printf(MSG_DEBUG,
"RSN: found matching PMKID from PMKSA cache");
} else {
wpa_printf( MSG_DEBUG,
"RSN: no matching PMKID found");
abort_cached = 1;
}
}
if (pmkid && sm->cur_pmksa &&
os_memcmp_const(pmkid, sm->cur_pmksa->pmkid, PMKID_LEN) == 0) {
wpa_hexdump(MSG_DEBUG, "RSN: matched PMKID", pmkid, PMKID_LEN);
wpa_sm_set_pmk_from_pmksa(sm);
wpa_hexdump_key(MSG_DEBUG, "RSN: PMK from PMKSA cache",
sm->pmk, sm->pmk_len);
//eapol_sm_notify_cached(sm->eapol);
#ifdef CONFIG_IEEE80211R
sm->xxkey_len = 0;
#endif /* CONFIG_IEEE80211R */
} else if (wpa_key_mgmt_wpa_ieee8021x(sm->key_mgmt)) {
int res = 0, pmk_len;
/* For ESP_SUPPLICANT this is already set using wpa_set_pmk*/
//res = eapol_sm_get_key(sm->eapol, 0, sm->pmk, PMK_LEN);
if (wpa_key_mgmt_sha384(sm->key_mgmt))
pmk_len = PMK_LEN_SUITE_B_192;
else
pmk_len = PMK_LEN;
if(!sm->pmk_len) {
res = -1;
}
if (res == 0) {
struct rsn_pmksa_cache_entry *sa = NULL;
wpa_hexdump_key(MSG_DEBUG, "WPA: PMK from EAPOL state "
"machines", sm->pmk, pmk_len);
sm->pmk_len = pmk_len;
//wpa_supplicant_key_mgmt_set_pmk(sm);
if (sm->proto == WPA_PROTO_RSN &&
!wpa_key_mgmt_suite_b(sm->key_mgmt) &&
!wpa_key_mgmt_ft(sm->key_mgmt)) {
sa = pmksa_cache_add(sm->pmksa, sm->pmk, pmk_len,
NULL, NULL, 0, src_addr, sm->own_addr,
sm->network_ctx, sm->key_mgmt);
}
if (!sm->cur_pmksa && pmkid &&
pmksa_cache_get(sm->pmksa, src_addr, pmkid, NULL))
{
wpa_printf( MSG_DEBUG,
"RSN: the new PMK matches with the "
"PMKID");
abort_cached = 0;
} else if (sa && !sm->cur_pmksa && pmkid) {
/*
* It looks like the authentication server
* derived mismatching MSK. This should not
* really happen, but bugs happen.. There is not
* much we can do here without knowing what
* exactly caused the server to misbehave.
*/
wpa_printf( MSG_INFO,
"RSN: PMKID mismatch - authentication server may have derived different MSK?!");
return -1;
}
if (!sm->cur_pmksa)
sm->cur_pmksa = sa;
} else {
wpa_printf( MSG_WARNING,
"WPA: Failed to get master session key from "
"EAPOL state machines - key handshake "
"aborted");
if (sm->cur_pmksa) {
wpa_printf( MSG_DEBUG,
"RSN: Cancelled PMKSA caching "
"attempt");
sm->cur_pmksa = NULL;
abort_cached = 1;
} else if (!abort_cached) {
return -1;
}
}
}
if (abort_cached && wpa_key_mgmt_wpa_ieee8021x(sm->key_mgmt) &&
!wpa_key_mgmt_suite_b(sm->key_mgmt) &&
!wpa_key_mgmt_ft(sm->key_mgmt) && sm->key_mgmt != WPA_KEY_MGMT_OSEN)
{
/* Send EAPOL-Start to trigger full EAP authentication. */
u8 *buf;
size_t buflen;
wpa_printf( MSG_DEBUG,
"RSN: no PMKSA entry found - trigger "
"full EAP authentication");
buf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_START,
NULL, 0, &buflen, NULL);
if (buf) {
wpa_sm_ether_send(sm, sm->bssid, ETH_P_EAPOL,
buf, buflen);
wpa_sm_free_eapol(buf);
return -2;
}
return -1;
}
return 0;
}
/**
* wpa_supplicant_send_2_of_4 - Send message 2 of WPA/RSN 4-Way Handshake
* @sm: Pointer to WPA state machine data from wpa_sm_init()
* @dst: Destination address for the frame
* @key: Pointer to the EAPOL-Key frame header
* @ver: Version bits from EAPOL-Key Key Info
* @nonce: Nonce value for the EAPOL-Key frame
* @wpa_ie: WPA/RSN IE
* @wpa_ie_len: Length of the WPA/RSN IE
* @ptk: PTK to use for keyed hash and encryption
* Returns: 0 on success, -1 on failure
*/
int wpa_supplicant_send_2_of_4(struct wpa_sm *sm, const unsigned char *dst,
const struct wpa_eapol_key *key,
int ver, const u8 *nonce,
const u8 *wpa_ie, size_t wpa_ie_len,
struct wpa_ptk *ptk)
{
size_t mic_len, hdrlen, rlen;
struct wpa_eapol_key *reply;
struct wpa_eapol_key_192 *reply192;
u8 *rsn_ie_buf = NULL;
u8 *rbuf, *key_mic;
if (wpa_ie == NULL) {
wpa_printf(MSG_ERROR, "WPA: No wpa_ie set - cannot "
"generate msg 2/4");
return -1;
}
#ifdef CONFIG_IEEE80211R
if (wpa_key_mgmt_ft(sm->key_mgmt)) {
int res;
wpa_hexdump(MSG_DEBUG, "WPA: WPA IE before FT processing",
wpa_ie, wpa_ie_len);
/*
* Add PMKR1Name into RSN IE (PMKID-List) and add MDIE and
* FTIE from (Re)Association Response.
*/
rsn_ie_buf = os_malloc(wpa_ie_len + 2 + 2 + PMKID_LEN +
sm->assoc_resp_ies_len);
if (rsn_ie_buf == NULL)
return -1;
os_memcpy(rsn_ie_buf, wpa_ie, wpa_ie_len);
res = wpa_insert_pmkid(rsn_ie_buf, &wpa_ie_len,
sm->pmk_r1_name);
if (res < 0) {
os_free(rsn_ie_buf);
return -1;
}
wpa_hexdump(MSG_DEBUG,
"WPA: WPA IE after PMKID[PMKR1Name] addition into RSNE",
rsn_ie_buf, wpa_ie_len);
if (sm->assoc_resp_ies) {
wpa_hexdump(MSG_DEBUG, "WPA: Add assoc_resp_ies",
sm->assoc_resp_ies,
sm->assoc_resp_ies_len);
os_memcpy(rsn_ie_buf + wpa_ie_len, sm->assoc_resp_ies,
sm->assoc_resp_ies_len);
wpa_ie_len += sm->assoc_resp_ies_len;
}
wpa_ie = rsn_ie_buf;
}
#endif /* CONFIG_IEEE80211R */
wpa_hexdump(MSG_MSGDUMP, "WPA: WPA IE for msg 2/4\n", wpa_ie, wpa_ie_len);
mic_len = wpa_mic_len(sm->key_mgmt, sm->pmk_len);
hdrlen = mic_len == 24 ? sizeof(*reply192) : sizeof(*reply);
rbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY,
NULL, hdrlen + wpa_ie_len,
&rlen, (void *) &reply);
if (rbuf == NULL) {
os_free(rsn_ie_buf);
return -1;
}
reply192 = (struct wpa_eapol_key_192 *) reply;
reply->type = sm->proto == WPA_PROTO_RSN ?
EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA;
WPA_PUT_BE16(reply->key_info,
ver | WPA_KEY_INFO_KEY_TYPE | WPA_KEY_INFO_MIC);
if (sm->proto == WPA_PROTO_RSN)
WPA_PUT_BE16(reply->key_length, 0);
else
memcpy(reply->key_length, key->key_length, 2);
memcpy(reply->replay_counter, key->replay_counter,
WPA_REPLAY_COUNTER_LEN);
key_mic = reply192->key_mic; /* same offset for reply and reply192 */
if (mic_len == 24) {
WPA_PUT_BE16(reply192->key_data_length, wpa_ie_len);
os_memcpy(reply192 + 1, wpa_ie, wpa_ie_len);
} else {
WPA_PUT_BE16(reply->key_data_length, wpa_ie_len);
os_memcpy(reply + 1, wpa_ie, wpa_ie_len);
}
os_free(rsn_ie_buf);
os_memcpy(reply->key_nonce, nonce, WPA_NONCE_LEN);
wpa_printf(MSG_DEBUG, "WPA Send EAPOL-Key 2/4");
wpa_eapol_key_send(sm, ptk->kck, ptk->kck_len, ver, dst, ETH_P_EAPOL,
rbuf, rlen, key_mic);
wpa_sm_free_eapol(rbuf);
return 0;
}
static int wpa_derive_ptk(struct wpa_sm *sm, const unsigned char *src_addr,
const struct wpa_eapol_key *key, struct wpa_ptk *ptk)
{
#ifdef CONFIG_IEEE80211R
if (wpa_key_mgmt_ft(sm->key_mgmt))
return wpa_derive_ptk_ft(sm, src_addr, key, ptk);
#endif /* CONFIG_IEEE80211R */
return wpa_pmk_to_ptk(sm->pmk, sm->pmk_len, "Pairwise key expansion",
sm->own_addr, sm->bssid, sm->snonce,
key->key_nonce, ptk, sm->key_mgmt,
sm->pairwise_cipher);
}
void wpa_supplicant_process_1_of_4(struct wpa_sm *sm,
const unsigned char *src_addr,
const struct wpa_eapol_key *key,
u16 ver, const u8 *key_data,
size_t key_data_len)
{
struct wpa_eapol_ie_parse ie;
struct wpa_ptk *ptk;
int res;
u8 *kde, *kde_buf = NULL;
size_t kde_len;
#ifdef CONFIG_ESP_WIFI_ENTERPRISE_SUPPORT
if (is_wpa2_enterprise_connection()) {
wpa2_ent_eap_state_t state = eap_client_get_eap_state();
if (state == WPA2_ENT_EAP_STATE_IN_PROGRESS) {
wpa_printf(MSG_INFO, "EAP Success has not been processed yet."
" Drop EAPOL message.");
return;
}
}
#endif
wpa_sm_set_state(WPA_FIRST_HALF_4WAY_HANDSHAKE);
wpa_printf(MSG_DEBUG, "WPA 1/4-Way Handshake");
memset(&ie, 0, sizeof(ie));
if (sm->proto == WPA_PROTO_RSN) {
/* RSN: msg 1/4 should contain PMKID for the selected PMK */
wpa_hexdump(MSG_DEBUG, "RSN: msg 1/4 key data",
key_data, key_data_len);
if (wpa_supplicant_parse_ies(key_data, key_data_len, &ie) < 0)
goto failed;
if (ie.pmkid) {
wpa_hexdump(MSG_DEBUG, "RSN: PMKID from "
"Authenticator", ie.pmkid, PMKID_LEN);
}
}
res = wpa_supplicant_get_pmk(sm, src_addr, ie.pmkid);
if (res == -2) {
wpa_printf(MSG_DEBUG, "RSN: Do not reply to msg 1/4 - "
"requesting full EAP authentication");
return;
}
if (res)
goto failed;
#ifdef CONFIG_ESP_WIFI_ENTERPRISE_SUPPORT
if (is_wpa2_enterprise_connection()) {
pmksa_cache_set_current(sm, NULL, sm->bssid, 0, 0);
}
#endif
if (sm->renew_snonce) {
if (os_get_random(sm->snonce, WPA_NONCE_LEN)) {
wpa_printf(MSG_DEBUG, "WPA: Failed to get random data for SNonce");
goto failed;
}
sm->renew_snonce = 0;
wpa_hexdump(MSG_DEBUG, "WPA: Renewed SNonce",
sm->snonce, WPA_NONCE_LEN);
}
/* Calculate PTK which will be stored as a temporary PTK until it has
* been verified when processing message 3/4. */
ptk = &sm->tptk;
wpa_derive_ptk(sm, src_addr, key, ptk);
/* Supplicant: swap tx/rx Mic keys */
sm->tptk_set = 1;
sm->ptk_set = 0;
sm->key_install = true;
kde = sm->assoc_wpa_ie;
kde_len = sm->assoc_wpa_ie_len;
kde_buf = os_malloc(kde_len +
sm->assoc_rsnxe_len);
if (!kde_buf)
goto failed;
os_memcpy(kde_buf, kde, kde_len);
kde = kde_buf;
if (sm->assoc_rsnxe && sm->assoc_rsnxe_len) {
os_memcpy(kde + kde_len, sm->assoc_rsnxe, sm->assoc_rsnxe_len);
kde_len += sm->assoc_rsnxe_len;
}
if (wpa_supplicant_send_2_of_4(sm, sm->bssid, key, ver, sm->snonce,
kde, kde_len, ptk))
goto failed;
os_free(kde_buf);
memcpy(sm->anonce, key->key_nonce, WPA_NONCE_LEN);
return;
failed:
os_free(kde_buf);
wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED);
}
static void wpa_sm_rekey_ptk(void *eloop_ctx, void *timeout_ctx)
{
struct wpa_sm *sm = eloop_ctx;
wpa_printf(MSG_DEBUG, "WPA: Request PTK rekeying");
wpa_sm_key_request(sm, 0, 1);
}
static int wpa_supplicant_install_ptk(struct wpa_sm *sm, enum key_flag key_flag)
{
int keylen;
enum wpa_alg alg;
if (sm->ptk.installed) {
wpa_printf(MSG_DEBUG, "WPA: Do not re-install same PTK to the driver");
return 0;
}
wpa_printf(MSG_DEBUG, "WPA: Installing PTK to the driver.");
if (sm->pairwise_cipher == WPA_CIPHER_NONE) {
wpa_printf(MSG_DEBUG, "WPA: Pairwise Cipher Suite: NONE - do not use pairwise keys");
return 0;
}
if (!wpa_cipher_valid_pairwise(sm->pairwise_cipher)) {
wpa_printf(MSG_DEBUG, "WPA: Unsupported pairwise cipher %d", sm->pairwise_cipher);
return -1;
}
alg = wpa_cipher_to_alg(sm->pairwise_cipher);
keylen = wpa_cipher_key_len(sm->pairwise_cipher);
if (alg == WIFI_WPA_ALG_NONE) {
wpa_printf(MSG_DEBUG, "WPA: Pairwise Cipher Suite: "
"NONE - do not use pairwise keys");
return 0;
}
if (wpa_sm_set_key(&(sm->install_ptk), alg, sm->bssid, 0, 1, (sm->install_ptk).seq, WPA_KEY_RSC_LEN,
sm->ptk.tk, keylen, KEY_FLAG_PAIRWISE | key_flag) < 0) {
wpa_printf(MSG_DEBUG, "WPA: Failed to set PTK to the "
"driver (alg=%d keylen=%d bssid=" MACSTR ")",
alg, keylen, MAC2STR(sm->bssid));
return -1;
}
sm->ptk.installed = 1;
if (sm->wpa_ptk_rekey) {
eloop_cancel_timeout(wpa_sm_rekey_ptk, sm, NULL);
eloop_register_timeout(sm->wpa_ptk_rekey, 0, wpa_sm_rekey_ptk,
sm, NULL);
}
return 0;
}
static int wpa_supplicant_check_group_cipher(struct wpa_sm *sm,
int group_cipher,
int keylen, int maxkeylen,
int *key_rsc_len,
enum wpa_alg *alg)
{
int klen;
*alg = wpa_cipher_to_alg(group_cipher);
if (*alg == WIFI_WPA_ALG_NONE) {
wpa_printf(MSG_WARNING,
"WPA: Unsupported Group Cipher %d",
group_cipher);
return -1;
}
*key_rsc_len = 6;
klen = wpa_cipher_key_len(group_cipher);
if (keylen != klen || maxkeylen < klen) {
wpa_printf(MSG_WARNING,
"WPA: Unsupported %s Group Cipher key length %d (%d)",
wpa_cipher_txt(group_cipher), keylen, maxkeylen);
return -1;
}
return 0;
}
void wpa_supplicant_key_neg_complete(struct wpa_sm *sm,
const u8 *addr, int secure)
{
wpa_printf(MSG_DEBUG, "WPA: Key negotiation completed with "
MACSTR " [PTK=%s GTK=%s]\n", MAC2STR(addr),
wpa_cipher_txt(sm->pairwise_cipher),
wpa_cipher_txt(sm->group_cipher));
wpa_sm_cancel_auth_timeout(sm);
wpa_sm_set_state(WPA_COMPLETED);
wpa_neg_complete();
sm->eapol1_count = 0;
sm->use_ext_key_id = 0;
if (secure) {
wpa_sm_mlme_setprotection(
sm, addr, MLME_SETPROTECTION_PROTECT_TYPE_RX_TX,
MLME_SETPROTECTION_KEY_TYPE_PAIRWISE);
if (wpa_key_mgmt_wpa_psk(sm->key_mgmt) || sm->key_mgmt == WPA_KEY_MGMT_OWE || sm->key_mgmt == WPA_KEY_MGMT_DPP)
eapol_sm_notify_eap_success(TRUE);
/*
* Start preauthentication after a short wait to avoid a
* possible race condition between the data receive and key
* configuration after the 4-Way Handshake. This increases the
* likelyhood of the first preauth EAPOL-Start frame getting to
* the target AP.
*/
}
#ifdef CONFIG_IEEE80211R
if (wpa_key_mgmt_ft(sm->key_mgmt)) {
/* Prepare for the next transition */
wpa_ft_prepare_auth_request(sm, NULL);
sm->ft_protocol = 1;
}
#endif /* CONFIG_IEEE80211R */
}
static int wpa_supplicant_install_gtk(struct wpa_sm *sm,
struct wpa_gtk_data *gd)
{
u8 *_gtk = gd->gtk;
u8 gtk_buf[32];
u8 *key_rsc=(sm->install_gtk).seq;
wpa_hexdump(MSG_DEBUG, "WPA: Group Key", gd->gtk, gd->gtk_len);
/* Detect possible key reinstallation */
if ((sm->gtk.gtk_len == (size_t) gd->gtk_len &&
os_memcmp(sm->gtk.gtk, gd->gtk, sm->gtk.gtk_len) == 0) ||
wpa_supplicant_gtk_in_use(sm, &(sm->gd))) {
wpa_printf(MSG_DEBUG,
"WPA: Not reinstalling already in-use GTK to the driver (keyidx=%d tx=%d len=%d)",
gd->keyidx, gd->tx, gd->gtk_len);
return 0;
}
wpa_printf(MSG_DEBUG, "WPA: Installing GTK to the driver "
"(keyidx=%d tx=%d len=%d).", gd->keyidx, gd->tx,
gd->gtk_len);
wpa_hexdump(MSG_DEBUG, "WPA: RSC", key_rsc, gd->key_rsc_len);
if (sm->group_cipher == WPA_CIPHER_TKIP) {
/* Swap Tx/Rx keys for Michael MIC */
memcpy(gtk_buf, gd->gtk, 16);
memcpy(gtk_buf + 16, gd->gtk + 16, 8);
memcpy(gtk_buf + 24, gd->gtk + 24, 8);
_gtk = gtk_buf;
}
if (sm->pairwise_cipher == WPA_CIPHER_NONE) {
if (wpa_sm_set_key(&(sm->install_gtk), gd->alg,
sm->bssid, //(u8 *) "\xff\xff\xff\xff\xff\xff",
gd->keyidx, 1, key_rsc, gd->key_rsc_len,
_gtk, gd->gtk_len, (KEY_FLAG_GROUP | KEY_FLAG_RX | KEY_FLAG_TX)) < 0) {
wpa_printf(MSG_DEBUG, "WPA: Failed to set "
"GTK to the driver (Group only).");
return -1;
}
} else if (wpa_sm_set_key(&(sm->install_gtk), gd->alg,
sm->bssid, //(u8 *) "\xff\xff\xff\xff\xff\xff",
gd->keyidx, gd->tx, key_rsc, gd->key_rsc_len,
_gtk, gd->gtk_len, KEY_FLAG_GROUP | KEY_FLAG_RX) < 0) {
wpa_printf(MSG_DEBUG, "WPA: Failed to set GTK to "
"the driver (alg=%d keylen=%d keyidx=%d)",
gd->alg, gd->gtk_len, gd->keyidx);
return -1;
}
sm->gtk.gtk_len = gd->gtk_len;
os_memcpy(sm->gtk.gtk, gd->gtk, sm->gtk.gtk_len);
return 0;
}
static bool wpa_supplicant_gtk_in_use(struct wpa_sm *sm, struct wpa_gtk_data *gd)
{
u8 *_gtk = gd->gtk;
u8 gtk_buf[32];
u8 gtk_get[32] = {0};
u8 ifx;
int alg;
u8 bssid[6];
int keyidx = gd->keyidx;
wpa_printf(MSG_DEBUG, "WPA: Judge GTK: (keyidx=%d len=%d).", gd->keyidx, gd->gtk_len);
if (sm->group_cipher == WPA_CIPHER_TKIP) {
/* Swap Tx/Rx keys for Michael MIC */
memcpy(gtk_buf, gd->gtk, 16);
memcpy(gtk_buf + 16, gd->gtk + 16, 8);
memcpy(gtk_buf + 24, gd->gtk + 24, 8);
_gtk = gtk_buf;
}
if (wpa_sm_get_key(&ifx, &alg, bssid, &keyidx, gtk_get, gd->gtk_len, KEY_FLAG_GROUP) == 0) {
if (ifx == 0 && alg == gd->alg && memcmp(bssid, sm->bssid, ETH_ALEN) == 0 &&
memcmp(_gtk, gtk_get, gd->gtk_len) == 0) {
wpa_printf(MSG_DEBUG, "GTK %d is already in use, it may be an attack, ignore it.", gd->keyidx);
return true;
}
}
return false;
}
int wpa_supplicant_gtk_tx_bit_workaround(const struct wpa_sm *sm,
int tx)
{
if (tx && sm->pairwise_cipher != WPA_CIPHER_NONE) {
/* Ignore Tx bit for GTK if a pairwise key is used. One AP
* seemed to set this bit (incorrectly, since Tx is only when
* doing Group Key only APs) and without this workaround, the
* data connection does not work because wpa_supplicant
* configured non-zero keyidx to be used for unicast. */
wpa_printf(MSG_DEBUG, "WPA: Tx bit set for GTK, but pairwise "
"keys are used - ignore Tx bit");
return 0;
}
return tx;
}
int wpa_supplicant_pairwise_gtk(struct wpa_sm *sm,
const u8 *gtk, size_t gtk_len,
int key_info)
{
struct wpa_gtk_data *gd=&(sm->gd);
/*
* IEEE Std 802.11i-2004 - 8.5.2 EAPOL-Key frames - Figure 43x
* GTK KDE format:
* KeyID[bits 0-1], Tx [bit 2], Reserved [bits 3-7]
* Reserved [bits 0-7]
* GTK
*/
memset(gd, 0, sizeof(struct wpa_gtk_data));
wpa_hexdump(MSG_DEBUG, "RSN: received GTK in pairwise handshake",
gtk, gtk_len);
if (gtk_len < 2 || gtk_len - 2 > sizeof(gd->gtk))
return -1;
gd->keyidx = gtk[0] & 0x3;
gd->tx = wpa_supplicant_gtk_tx_bit_workaround(sm,
!!(gtk[0] & BIT(2)));
gtk += 2;
gtk_len -= 2;
memcpy(gd->gtk, gtk, gtk_len);
gd->gtk_len = gtk_len;
if (wpa_supplicant_check_group_cipher(sm, sm->group_cipher,
gtk_len, gtk_len,
&(gd->key_rsc_len), &(gd->alg))) {
wpa_printf(MSG_DEBUG, "RSN: Failed to install GTK");
return -1;
}
return 0;
}
#ifdef CONFIG_IEEE80211W
static int wpa_supplicant_install_igtk(struct wpa_sm *sm,
const wifi_wpa_igtk_t *igtk)
{
size_t len = wpa_cipher_key_len(sm->mgmt_group_cipher);
u16 keyidx = WPA_GET_LE16(igtk->keyid);
/* Detect possible key reinstallation */
if (sm->igtk.igtk_len == len &&
os_memcmp(sm->igtk.igtk, igtk->igtk, sm->igtk.igtk_len) == 0) {
wpa_printf(MSG_DEBUG,
"WPA: Not reinstalling already in-use IGTK to the driver (keyidx=%d)",
keyidx);
return 0;
}
wpa_printf(MSG_DEBUG,
"WPA: IGTK keyid %d pn %02x%02x%02x%02x%02x%02x",
keyidx, MAC2STR(igtk->pn));
wpa_hexdump_key(MSG_DEBUG, "WPA: IGTK", igtk->igtk, len);
if (esp_wifi_set_igtk_internal(WIFI_IF_STA, igtk) < 0) {
if (keyidx > 4095) {
wpa_printf(MSG_WARNING,
"WPA: Invalid IGTK KeyID %d", keyidx);
}
wpa_printf(MSG_WARNING,
"WPA: Failed to configure IGTK to the driver");
return -1;
}
sm->igtk.igtk_len = len;
os_memcpy(sm->igtk.igtk, igtk->igtk, sm->igtk.igtk_len);
return 0;
}
#endif /* CONFIG_IEEE80211W */
#ifdef DEBUG_PRINT
void wpa_report_ie_mismatch(struct wpa_sm *sm,
const char *reason, const u8 *src_addr,
const u8 *wpa_ie, size_t wpa_ie_len,
const u8 *rsn_ie, size_t rsn_ie_len)
#else
void wpa_report_ie_mismatch(struct wpa_sm *sm, const u8 *src_addr,
const u8 *wpa_ie, size_t wpa_ie_len,
const u8 *rsn_ie, size_t rsn_ie_len)
#endif
{
wpa_printf(MSG_DEBUG, "WPA: %s (src=" MACSTR ")",
reason, MAC2STR(src_addr));
if (sm->ap_wpa_ie) {
wpa_hexdump(MSG_INFO, "WPA: WPA IE in Beacon/ProbeResp",
sm->ap_wpa_ie, sm->ap_wpa_ie_len);
}
if (wpa_ie) {
if (!sm->ap_wpa_ie) {
wpa_printf(MSG_DEBUG, "WPA: No WPA IE in "
"Beacon/ProbeResp");
}
wpa_hexdump(MSG_INFO, "WPA: WPA IE in 3/4 msg",
wpa_ie, wpa_ie_len);
}
if (sm->ap_rsn_ie) {
wpa_hexdump(MSG_INFO, "WPA: RSN IE in Beacon/ProbeResp",
sm->ap_rsn_ie, sm->ap_rsn_ie_len);
}
if (rsn_ie) {
if (!sm->ap_rsn_ie) {
wpa_printf(MSG_DEBUG, "WPA: No RSN IE in "
"Beacon/ProbeResp");
}
wpa_hexdump(MSG_INFO, "WPA: RSN IE in 3/4 msg",
rsn_ie, rsn_ie_len);
}
wpa_sm_disassociate(sm, WLAN_REASON_IE_IN_4WAY_DIFFERS);
}
static int ieee80211w_set_keys(struct wpa_sm *sm,
struct wpa_eapol_ie_parse *ie)
{
#ifdef CONFIG_IEEE80211W
size_t len;
if (!wpa_cipher_valid_mgmt_group(sm->mgmt_group_cipher))
return 0;
if (ie->igtk) {
const wifi_wpa_igtk_t *igtk;
#define WPA_IGTK_KDE_PREFIX_LEN (2 + 6)
len = wpa_cipher_key_len(sm->mgmt_group_cipher);
if (ie->igtk_len != WPA_IGTK_KDE_PREFIX_LEN + len) {
return -1;
}
igtk = (const wifi_wpa_igtk_t*)ie->igtk;
if (wpa_supplicant_install_igtk(sm, igtk) < 0) {
return -1;
}
}
#endif
return 0;
}
static int wpa_supplicant_validate_ie(struct wpa_sm *sm,
const unsigned char *src_addr,
struct wpa_eapol_ie_parse *ie)
{
if (ie->wpa_ie == NULL && ie->rsn_ie == NULL &&
(sm->ap_wpa_ie || sm->ap_rsn_ie)) {
#ifdef DEBUG_PRINT
wpa_report_ie_mismatch(sm, "IE in 3/4 msg does not match "
"with IE in Beacon/ProbeResp (no IE?)",
src_addr, ie->wpa_ie, ie->wpa_ie_len,
ie->rsn_ie, ie->rsn_ie_len);
#else
wpa_report_ie_mismatch(sm,
src_addr, ie->wpa_ie, ie->wpa_ie_len,
ie->rsn_ie, ie->rsn_ie_len);
#endif
return -1;
}
if ((ie->wpa_ie && sm->ap_wpa_ie &&
(ie->wpa_ie_len != sm->ap_wpa_ie_len ||
memcmp(ie->wpa_ie, sm->ap_wpa_ie, ie->wpa_ie_len) != 0)) ||
(ie->rsn_ie && sm->ap_rsn_ie &&
wpa_compare_rsn_ie(wpa_key_mgmt_ft(sm->key_mgmt),
sm->ap_rsn_ie, sm->ap_rsn_ie_len,
ie->rsn_ie, ie->rsn_ie_len))) {
#ifdef DEBUG_PRINT
wpa_report_ie_mismatch(sm, "IE in 3/4 msg does not match "
"with IE in Beacon/ProbeResp",
src_addr, ie->wpa_ie, ie->wpa_ie_len,
ie->rsn_ie, ie->rsn_ie_len);
#else
wpa_report_ie_mismatch(sm,
src_addr, ie->wpa_ie, ie->wpa_ie_len,
ie->rsn_ie, ie->rsn_ie_len);
#endif
return -1;
}
if (sm->proto == WPA_PROTO_WPA &&
ie->rsn_ie && sm->ap_rsn_ie == NULL && sm->rsn_enabled) {
#ifdef DEBUG_PRINT
wpa_report_ie_mismatch(sm, "Possible downgrade attack "
"detected - RSN was enabled and RSN IE "
"was in msg 3/4, but not in "
"Beacon/ProbeResp",
src_addr, ie->wpa_ie, ie->wpa_ie_len,
ie->rsn_ie, ie->rsn_ie_len);
#else
wpa_report_ie_mismatch(sm,
src_addr, ie->wpa_ie, ie->wpa_ie_len,
ie->rsn_ie, ie->rsn_ie_len);
#endif
return -1;
}
if (sm->proto == WPA_PROTO_RSN &&
((sm->ap_rsnxe && !ie->rsnxe) ||
(!sm->ap_rsnxe && ie->rsnxe) ||
(sm->ap_rsnxe && ie->rsnxe &&
(sm->ap_rsnxe_len != ie->rsnxe_len ||
os_memcmp(sm->ap_rsnxe, ie->rsnxe, sm->ap_rsnxe_len) != 0)))) {
wpa_printf(MSG_INFO,
"WPA: RSNXE mismatch between Beacon/ProbeResp and EAPOL-Key msg 3/4");
wpa_hexdump(MSG_INFO, "RSNXE in Beacon/ProbeResp",
sm->ap_rsnxe, sm->ap_rsnxe_len);
wpa_hexdump(MSG_INFO, "RSNXE in EAPOL-Key msg 3/4",
ie->rsnxe, ie->rsnxe_len);
wpa_sm_deauthenticate(sm, WLAN_REASON_IE_IN_4WAY_DIFFERS);
return -1;
}
return 0;
}
/**
* wpa_supplicant_send_4_of_4 - Send message 4 of WPA/RSN 4-Way Handshake
* @sm: Pointer to WPA state machine data from wpa_sm_init()
* @dst: Destination address for the frame
* @key: Pointer to the EAPOL-Key frame header
* @ver: Version bits from EAPOL-Key Key Info
* @key_info: Key Info
* @ptk: PTK to use for keyed hash and encryption
* Returns: 0 on success, -1 on failure
*/
static int wpa_supplicant_send_4_of_4(struct wpa_sm *sm, const unsigned char *dst,
const struct wpa_eapol_key *key,
u16 ver, u16 key_info,
struct wpa_ptk *ptk)
{
size_t mic_len, hdrlen, rlen;
struct wpa_eapol_key *reply;
struct wpa_eapol_key_192 *reply192;
u8 *rbuf, *key_mic;
mic_len = wpa_mic_len(sm->key_mgmt, sm->pmk_len);
hdrlen = mic_len == 24 ? sizeof(*reply192) : sizeof(*reply);
rbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY, NULL,
hdrlen,
&rlen, (void *) &reply);
if (rbuf == NULL)
return -1;
sm->txcb_flags |= WPA_4_4_HANDSHAKE_BIT;
wpa_printf(MSG_DEBUG, "tx 4/4 txcb_flags=%d", sm->txcb_flags);
reply192 = (struct wpa_eapol_key_192 *) reply;
reply->type = sm->proto == WPA_PROTO_RSN ?
EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA;
key_info &= WPA_KEY_INFO_SECURE;
key_info |= ver | WPA_KEY_INFO_KEY_TYPE | WPA_KEY_INFO_MIC;
WPA_PUT_BE16(reply->key_info, key_info);
if (sm->proto == WPA_PROTO_RSN)
WPA_PUT_BE16(reply->key_length, 0);
else
memcpy(reply->key_length, key->key_length, 2);
memcpy(reply->replay_counter, key->replay_counter,
WPA_REPLAY_COUNTER_LEN);
key_mic = reply192->key_mic; /* same offset for reply and reply192 */
if (mic_len == 24)
WPA_PUT_BE16(reply192->key_data_length, 0);
else
WPA_PUT_BE16(reply->key_data_length, 0);
wpa_printf(MSG_DEBUG, "WPA Send EAPOL-Key 4/4");
wpa_eapol_key_send(sm, ptk->kck, ptk->kck_len, ver, dst, ETH_P_EAPOL,
rbuf, rlen, key_mic);
wpa_sm_free_eapol(rbuf);
return 0;
}
static void wpa_sm_set_seq(struct wpa_sm *sm, struct wpa_eapol_key *key, u8 isptk)
{
u8 *key_rsc, *seq;
u8 null_rsc[WPA_KEY_RSC_LEN];
os_bzero(null_rsc, WPA_KEY_RSC_LEN);
if (sm->proto == WPA_PROTO_RSN && isptk) {
key_rsc = null_rsc;
} else {
key_rsc = key->key_rsc;
wpa_hexdump(MSG_DEBUG, "WPA: RSC", key_rsc, WPA_KEY_RSC_LEN);
}
seq=(isptk) ? (sm->install_ptk).seq : (sm->install_gtk).seq;
memcpy(seq, key_rsc, WPA_KEY_RSC_LEN);
}
static void wpa_supplicant_process_3_of_4(struct wpa_sm *sm,
struct wpa_eapol_key *key,
u16 ver, const u8 *key_data,
size_t key_data_len)
{
u16 key_info, keylen;
struct wpa_eapol_ie_parse ie;
wpa_sm_set_state(WPA_LAST_HALF_4WAY_HANDSHAKE);
wpa_printf(MSG_DEBUG, "WPA 3/4-Way Handshake");
key_info = WPA_GET_BE16(key->key_info);
if (wpa_supplicant_parse_ies(key_data, key_data_len, &ie) < 0)
goto failed;
if (wpa_supplicant_validate_ie(sm, sm->bssid, &ie) < 0)
goto failed;
if (ie.gtk && !(key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) {
wpa_printf(MSG_DEBUG, "WPA: GTK IE in unencrypted key data");
goto failed;
}
wpa_hexdump(MSG_DEBUG, "WPA: IE KeyData", key_data, key_data_len);
if (memcmp(sm->anonce, key->key_nonce, WPA_NONCE_LEN) != 0) {
wpa_printf(MSG_DEBUG, "WPA: ANonce from message 1 of 4-Way "
"Handshake differs from 3 of 4-Way Handshake - drop"
" packet (src=" MACSTR ")", MAC2STR(sm->bssid));
goto failed;
}
keylen = WPA_GET_BE16(key->key_length);
switch (sm->pairwise_cipher) {
case WPA_CIPHER_CCMP:
if (keylen != 16) {
wpa_printf(MSG_DEBUG, "WPA: Invalid CCMP key length "
"%d (src=" MACSTR ")",
keylen, MAC2STR(sm->bssid));
goto failed;
}
break;
case WPA_CIPHER_TKIP:
if (keylen != 32) {
wpa_printf(MSG_DEBUG, "WPA: Invalid TKIP key length "
"%d (src=" MACSTR ")",
keylen, MAC2STR(sm->bssid));
goto failed;
}
break;
}
/* SNonce was successfully used in msg 3/4, so mark it to be renewed
* for the next 4-Way Handshake. If msg 3 is received again, the old
* SNonce will still be used to avoid changing PTK. */
sm->renew_snonce = 1;
/*ready for txcallback , set seq and set txcallback param*/
wpa_sm_set_seq(sm, key, 1);
sm->key_info=key_info;
(sm->gd).gtk_len=0; //used as flag if gtk is installed in callback
if (ie.gtk) {
wpa_sm_set_seq(sm, key, 0);
if (wpa_supplicant_pairwise_gtk(sm,
ie.gtk, ie.gtk_len, key_info) < 0) {
wpa_printf(MSG_DEBUG, "RSN: Failed to configure GTK");
goto failed;
}
}
if (sm->pmf_cfg.capable && ieee80211w_set_keys(sm, &ie) < 0) {
wpa_printf(MSG_DEBUG, "RSN: Failed to configure IGTK");
goto failed;
}
if (ie.transition_disable) {
wpa_supplicant_transition_disable(sm, ie.transition_disable[0]);
}
if (sm->key_install && sm->key_info & WPA_KEY_INFO_INSTALL && sm->use_ext_key_id) {
wpa_supplicant_install_ptk(sm, KEY_FLAG_RX);
}
/*after txover, callback will continue run remain task*/
if (wpa_supplicant_send_4_of_4(sm, sm->bssid, key, ver, key_info,
&sm->ptk)) {
goto failed;
}
return;
failed:
wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED);
}
static int wpa_supplicant_activate_ptk(struct wpa_sm *sm)
{
int keylen;
enum wpa_alg alg;
alg = wpa_cipher_to_alg(sm->pairwise_cipher);
keylen = wpa_cipher_key_len(sm->pairwise_cipher);
if (alg == WIFI_WPA_ALG_NONE) {
wpa_printf(MSG_DEBUG, "WPA: Pairwise Cipher Suite: "
"NONE - do not use pairwise keys");
return 0;
}
wpa_printf(MSG_DEBUG,
"WPA: Activate PTK bssid=" MACSTR ")",
MAC2STR(sm->bssid));
if (wpa_sm_set_key(&(sm->install_ptk), alg, sm->bssid, 0, 1, (sm->install_ptk).seq,
WPA_KEY_RSC_LEN, sm->ptk.tk, keylen,
(KEY_FLAG_MODIFY | KEY_FLAG_PAIRWISE | KEY_FLAG_RX | KEY_FLAG_TX)) < 0) {
wpa_printf(MSG_WARNING,
"WPA: Failed to activate PTK for TX (idx=%d bssid="
MACSTR ")", 0, MAC2STR(sm->bssid));
return -1;
}
return 0;
}
static int wpa_supplicant_send_4_of_4_txcallback(struct wpa_sm *sm)
{
u16 key_info=sm->key_info;
if (sm->key_install && key_info & WPA_KEY_INFO_INSTALL) {
if (sm->use_ext_key_id) {
if (wpa_supplicant_activate_ptk(sm))
goto failed;
} else {
if (wpa_supplicant_install_ptk(sm, KEY_FLAG_TX | KEY_FLAG_RX))
goto failed;
}
}
else if (sm->key_install == false) {
wpa_printf(MSG_DEBUG, "PTK has been installed, it may be an attack, ignor it.");
}
wpa_sm_set_state(WPA_GROUP_HANDSHAKE);
if ((sm->gd).gtk_len) {
if (sm->key_install) {
if (wpa_supplicant_install_gtk(sm, &(sm->gd)))
goto failed;
}
else {
wpa_printf(MSG_DEBUG, "GTK has been installed, it may be an attack, ignor it.");
}
wpa_supplicant_key_neg_complete(sm, sm->bssid,
key_info & WPA_KEY_INFO_SECURE);
}
if (key_info & WPA_KEY_INFO_SECURE) {
wpa_sm_mlme_setprotection(
sm, sm->bssid, MLME_SETPROTECTION_PROTECT_TYPE_RX,
MLME_SETPROTECTION_KEY_TYPE_PAIRWISE);
}
sm->key_install = false;
#if defined(CONFIG_SUITEB192) || defined (CONFIG_SUITEB)
/* Add PMKSA cache entry for Suite B AKMs here since PMKID can be
* calculated only after KCK has been derived. Though, do not replace an
* existing PMKSA entry after each 4-way handshake (i.e., new KCK/PMKID)
* to avoid unnecessary changes of PMKID while continuing to use the
* same PMK. */
if (sm->proto == WPA_PROTO_RSN && wpa_key_mgmt_suite_b(sm->key_mgmt) &&
!sm->cur_pmksa) {
struct rsn_pmksa_cache_entry *sa;
sa = pmksa_cache_add(sm->pmksa, sm->pmk, sm->pmk_len, NULL,
sm->ptk.kck, sm->ptk.kck_len,
sm->bssid, sm->own_addr,
sm->network_ctx, sm->key_mgmt);
if (!sm->cur_pmksa)
sm->cur_pmksa = sa;
}
#endif
return 0;
failed:
return WLAN_REASON_UNSPECIFIED;
}
static int wpa_supplicant_process_1_of_2_rsn(struct wpa_sm *sm,
const u8 *keydata,
size_t keydatalen,
u16 key_info,
struct wpa_gtk_data *gd)
{
int maxkeylen;
struct wpa_eapol_ie_parse ie;
wpa_hexdump(MSG_DEBUG, "RSN: msg 1/2 key data", keydata, keydatalen);
wpa_supplicant_parse_ies(keydata, keydatalen, &ie);
if (ie.gtk && !(key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) {
wpa_printf(MSG_DEBUG, "WPA: GTK IE in unencrypted key data");
return -1;
}
if (ie.gtk == NULL) {
wpa_printf(MSG_DEBUG, "WPA: No GTK IE in Group Key msg 1/2");
return -1;
}
maxkeylen = gd->gtk_len = ie.gtk_len - 2;
if (wpa_supplicant_check_group_cipher(sm, sm->group_cipher,
gd->gtk_len, maxkeylen,
&gd->key_rsc_len, &gd->alg))
return -1;
wpa_hexdump(MSG_DEBUG, "RSN: received GTK in group key handshake",
ie.gtk, ie.gtk_len);
gd->keyidx = ie.gtk[0] & 0x3;
gd->tx = wpa_supplicant_gtk_tx_bit_workaround(sm,
!!(ie.gtk[0] & BIT(2)));
if (ie.gtk_len - 2 > sizeof(gd->gtk)) {
wpa_printf(MSG_DEBUG, "RSN: Too long GTK in GTK IE "
"(len=%lu)", (unsigned long) ie.gtk_len - 2);
return -1;
}
memcpy(gd->gtk, ie.gtk + 2, ie.gtk_len - 2);
if (ieee80211w_set_keys(sm, &ie) < 0)
{
wpa_printf(MSG_DEBUG, "RSN: Failed to configure IGTK");
}
return 0;
}
static int wpa_supplicant_process_1_of_2_wpa(struct wpa_sm *sm,
const struct wpa_eapol_key *key,
const u8 *key_data,
size_t key_data_len, u16 key_info,
u16 ver, struct wpa_gtk_data *gd)
{
size_t maxkeylen;
u8 ek[32];
gd->gtk_len = WPA_GET_BE16(key->key_length);
maxkeylen = key_data_len;
if (ver == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) {
if (maxkeylen < 8) {
wpa_printf(MSG_DEBUG, "WPA: Too short maxkeylen (%lu)",
(unsigned long) maxkeylen);
return -1;
}
maxkeylen -= 8;
}
if (wpa_supplicant_check_group_cipher(sm, sm->group_cipher,
gd->gtk_len, maxkeylen,
&gd->key_rsc_len, &gd->alg))
return -1;
gd->keyidx = (key_info & WPA_KEY_INFO_KEY_INDEX_MASK) >>
WPA_KEY_INFO_KEY_INDEX_SHIFT;
if (ver == WPA_KEY_INFO_TYPE_HMAC_MD5_RC4 && sm->ptk.kek_len == 16) {
os_memcpy(ek, key->key_iv, 16);
os_memcpy(ek + 16, sm->ptk.kek, sm->ptk.kek_len);
if (key_data_len > sizeof(gd->gtk)) {
wpa_printf(MSG_DEBUG, "WPA: RC4 key data "
"too long (%lu)",
(unsigned long) key_data_len);
return -1;
}
os_memcpy(gd->gtk, key_data, key_data_len);
if (rc4_skip(ek, 32, 256, gd->gtk, key_data_len)) {
wpa_printf(MSG_DEBUG, "WPA: RC4 failed");
return -1;
}
} else if (ver == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) {
if (maxkeylen % 8) {
wpa_printf(MSG_DEBUG,
"WPA: Unsupported AES-WRAP len %lu",
(unsigned long) maxkeylen);
return -1;
}
if (maxkeylen > sizeof(gd->gtk)) {
wpa_printf(MSG_DEBUG, "WPA: AES-WRAP key data "
"too long (keydatalen=%lu maxkeylen=%lu)",
(unsigned long) key_data_len,
(unsigned long) maxkeylen);
return -1;
}
if (aes_unwrap(sm->ptk.kek, sm->ptk.kek_len, maxkeylen / 8, key_data, gd->gtk)) {
wpa_printf(MSG_DEBUG, "WPA: AES unwrap "
"failed - could not decrypt GTK");
return -1;
}
} else {
wpa_printf(MSG_DEBUG, "WPA: Unsupported key_info type %d",
ver);
return -1;
}
gd->tx = wpa_supplicant_gtk_tx_bit_workaround(
sm, !!(key_info & WPA_KEY_INFO_TXRX));
return 0;
}
static int wpa_supplicant_send_2_of_2(struct wpa_sm *sm,
const struct wpa_eapol_key *key,
int ver, u16 key_info)
{
size_t mic_len, hdrlen, rlen;
struct wpa_eapol_key *reply;
struct wpa_eapol_key_192 *reply192;
u8 *rbuf, *key_mic;
mic_len = wpa_mic_len(sm->key_mgmt, sm->pmk_len);
hdrlen = mic_len == 24 ? sizeof(*reply192) : sizeof(*reply);
rbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY, NULL,
hdrlen, &rlen, (void *) &reply);
if (rbuf == NULL)
return -1;
sm->txcb_flags |= WPA_GROUP_HANDSHAKE_BIT;
wpa_printf(MSG_DEBUG, "2/2 txcb_flags=%d", sm->txcb_flags);
reply192 = (struct wpa_eapol_key_192 *) reply;
reply->type = sm->proto == WPA_PROTO_RSN ?
EAPOL_KEY_TYPE_RSN : EAPOL_KEY_TYPE_WPA;
key_info &= WPA_KEY_INFO_KEY_INDEX_MASK;
key_info |= ver | WPA_KEY_INFO_MIC | WPA_KEY_INFO_SECURE;
WPA_PUT_BE16(reply->key_info, key_info);
if (sm->proto == WPA_PROTO_RSN)
WPA_PUT_BE16(reply->key_length, 0);
else
memcpy(reply->key_length, key->key_length, 2);
memcpy(reply->replay_counter, key->replay_counter,
WPA_REPLAY_COUNTER_LEN);
key_mic = reply192->key_mic; /* same offset for reply and reply192 */
if (mic_len == 24)
WPA_PUT_BE16(reply192->key_data_length, 0);
else
WPA_PUT_BE16(reply->key_data_length, 0);
wpa_printf(MSG_DEBUG, "WPA Send 2/2 Group key");
wpa_eapol_key_send(sm, sm->ptk.kck, sm->ptk.kck_len, ver, sm->bssid, ETH_P_EAPOL,
rbuf, rlen, key_mic);
wpa_sm_free_eapol(rbuf);
return 0;
}
static void wpa_supplicant_process_1_of_2(struct wpa_sm *sm,
const unsigned char *src_addr,
struct wpa_eapol_key *key,
const u8 *key_data,
size_t key_data_len, u16 ver)
{
u16 key_info;
int ret;
struct wpa_gtk_data *gd=&(sm->gd);
memset(gd, 0, sizeof(struct wpa_gtk_data));
wpa_printf(MSG_DEBUG, "WPA 1/2 Group Key Handshake");
key_info = WPA_GET_BE16(key->key_info);
if (sm->proto == WPA_PROTO_RSN) {
ret = wpa_supplicant_process_1_of_2_rsn(sm, key_data,
key_data_len, key_info, gd);
} else {
ret = wpa_supplicant_process_1_of_2_wpa(sm, key, key_data,
key_data_len, key_info, ver, gd);
}
wpa_sm_set_state(WPA_GROUP_HANDSHAKE);
if (ret)
goto failed;
/*before callback, set seq for add param difficult in callback*/
wpa_sm_set_seq(sm, key, 0);
sm->key_info=key_info;
/*install gtk before send 2 of 2*/
if((sm->gd).gtk_len) {
if (wpa_supplicant_install_gtk(sm, &(sm->gd)))
goto failed;
} else {
goto failed;
}
if (wpa_supplicant_send_2_of_2(sm, key, ver, key_info))
goto failed;
if (WPA_SM_STATE(sm) == WPA_COMPLETED) {
#ifdef MSG_PRINT
wpa_printf(MSG_DEBUG, "WPA: Group rekeying "
"completed with " MACSTR " [GTK=%s]",
MAC2STR(sm->bssid), wpa_cipher_txt(sm->group_cipher));
#endif
wpa_sm_cancel_auth_timeout(sm);
wpa_sm_set_state(WPA_COMPLETED);
} else {
wpa_supplicant_key_neg_complete(sm, sm->bssid,
sm->key_info &WPA_KEY_INFO_SECURE);
}
return;
failed:
wpa_sm_deauthenticate(sm, WLAN_REASON_UNSPECIFIED);
}
static int wpa_supplicant_verify_eapol_key_mic(struct wpa_sm *sm,
struct wpa_eapol_key_192 *key,
u16 ver,
const u8 *buf, size_t len)
{
u8 mic[WPA_EAPOL_KEY_MIC_MAX_LEN];
int ok = 0;
size_t mic_len = wpa_mic_len(sm->key_mgmt, sm->pmk_len);
os_memcpy(mic, key->key_mic, mic_len);
if (sm->tptk_set) {
os_memset(key->key_mic, 0, mic_len);
wpa_eapol_key_mic(sm->tptk.kck, sm->tptk.kck_len, sm->key_mgmt,
ver, buf, len, key->key_mic);
if (os_memcmp_const(mic, key->key_mic, mic_len) != 0) {
wpa_printf(MSG_DEBUG, "WPA: Invalid EAPOL-Key MIC "
"when using TPTK - ignoring TPTK");
} else {
ok = 1;
sm->tptk_set = 0;
sm->ptk_set = 1;
memcpy(&sm->ptk, &sm->tptk, sizeof(sm->ptk));
}
}
if (!ok && sm->ptk_set) {
os_memset(key->key_mic, 0, mic_len);
wpa_eapol_key_mic(sm->ptk.kck, sm->ptk.kck_len, sm->key_mgmt,
ver, buf, len, key->key_mic);
if (os_memcmp_const(mic, key->key_mic, mic_len) != 0) {
wpa_printf(MSG_DEBUG, "WPA: Invalid EAPOL-Key MIC "
"- dropping packet");
return -1;
}
ok = 1;
}
if (!ok) {
wpa_printf(MSG_DEBUG, "WPA: Could not verify EAPOL-Key MIC "
"- dropping packet");
return -1;
}
memcpy(sm->rx_replay_counter, key->replay_counter,
WPA_REPLAY_COUNTER_LEN);
sm->rx_replay_counter_set = 1;
/*update request_counter for mic failure report*/
memcpy(sm->request_counter, key->replay_counter,
WPA_REPLAY_COUNTER_LEN);
return 0;
}
/* Decrypt RSN EAPOL-Key key data (RC4 or AES-WRAP) */
static int wpa_supplicant_decrypt_key_data(struct wpa_sm *sm,
struct wpa_eapol_key *key, u16 ver,
u8 *key_data, size_t *key_data_len)
{
wpa_hexdump(MSG_DEBUG, "RSN: encrypted key data",
key_data, *key_data_len);
if (!sm->ptk_set) {
wpa_printf(MSG_DEBUG, "WPA: PTK not available, "
"cannot decrypt EAPOL-Key key data.");
return -1;
}
/* Decrypt key data here so that this operation does not need
* to be implemented separately for each message type. */
if (ver == WPA_KEY_INFO_TYPE_HMAC_MD5_RC4 && sm->ptk.kek_len == 16) {
u8 ek[32];
os_memcpy(ek, key->key_iv, 16);
os_memcpy(ek + 16, sm->ptk.kek, sm->ptk.kek_len);
if (rc4_skip(ek, 32, 256, key_data, *key_data_len)) {
wpa_printf(MSG_DEBUG, "WPA: RC4 failed");
return -1;
}
} else if (ver == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES ||
ver == WPA_KEY_INFO_TYPE_AES_128_CMAC ||
wpa_use_aes_key_wrap(sm->key_mgmt)) {
u8 *buf;
if (*key_data_len < 8 || *key_data_len % 8) {
wpa_printf(MSG_DEBUG, "WPA: Unsupported "
"AES-WRAP len %u", (unsigned int) *key_data_len);
return -1;
}
*key_data_len -= 8; /* AES-WRAP adds 8 bytes */
/*replaced by xxx to remove malloc*/
buf = ((u8 *) (key+1))+ 8;
/*
buf = os_wifi_malloc(keydatalen);
if (buf == NULL) {
wpa_printf(MSG_DEBUG, "WPA: No memory for "
"AES-UNWRAP buffer");
return -1;
}
*/
if (aes_unwrap(sm->ptk.kek, sm->ptk.kek_len, *key_data_len / 8,
key_data, buf)) {
wpa_printf(MSG_DEBUG, "WPA: AES unwrap failed - "
"could not decrypt EAPOL-Key key data");
return -1;
}
os_memcpy(key_data, buf, *key_data_len);
WPA_PUT_BE16(key->key_data_length, *key_data_len);
} else {
wpa_printf(MSG_DEBUG, "WPA: Unsupported key_info type %d",
ver);
return -1;
}
wpa_hexdump(MSG_DEBUG, "WPA: decrypted EAPOL-Key key data",
key_data, *key_data_len);
return 0;
}
static void wpa_eapol_key_dump(struct wpa_sm *sm,
const struct wpa_eapol_key *key,
unsigned int key_data_len,
const u8 *mic, unsigned int mic_len)
{
#ifdef DEBUG_PRINT
u16 key_info = WPA_GET_BE16(key->key_info);
wpa_printf(MSG_DEBUG, " EAPOL-Key type=%d", key->type);
wpa_printf(MSG_DEBUG, " key_info 0x%x (ver=%d keyidx=%d rsvd=%d %s"
"%s%s%s%s%s%s%s)",
key_info, (u32)(key_info & WPA_KEY_INFO_TYPE_MASK),
(u32)((key_info & WPA_KEY_INFO_KEY_INDEX_MASK) >>
WPA_KEY_INFO_KEY_INDEX_SHIFT),
(u32)((key_info & (BIT(13) | BIT(14) | BIT(15))) >> 13),
key_info & WPA_KEY_INFO_KEY_TYPE ? "Pairwise" : "Group",
key_info & WPA_KEY_INFO_INSTALL ? " Install" : "",
key_info & WPA_KEY_INFO_ACK ? " Ack" : "",
key_info & WPA_KEY_INFO_MIC ? " MIC" : "",
key_info & WPA_KEY_INFO_SECURE ? " Secure" : "",
key_info & WPA_KEY_INFO_ERROR ? " Error" : "",
key_info & WPA_KEY_INFO_REQUEST ? " Request" : "",
key_info & WPA_KEY_INFO_ENCR_KEY_DATA ? " Encr" : "");
wpa_printf(MSG_DEBUG, " key_length=%u key_data_length=%u",
WPA_GET_BE16(key->key_length), key_data_len);
wpa_hexdump(MSG_DEBUG, " replay_counter",
key->replay_counter, WPA_REPLAY_COUNTER_LEN);
wpa_hexdump(MSG_DEBUG, " key_nonce", key->key_nonce, WPA_NONCE_LEN);
wpa_hexdump(MSG_DEBUG, " key_iv", key->key_iv, 16);
wpa_hexdump(MSG_DEBUG, " key_rsc", key->key_rsc, 8);
wpa_hexdump(MSG_DEBUG, " key_id (reserved)", key->key_id, 8);
wpa_hexdump(MSG_DEBUG, " key_mic", mic, mic_len);
#endif
}
/**
* wpa_sm_rx_eapol - Process received WPA EAPOL frames
* @sm: Pointer to WPA state machine data from wpa_sm_init()
* @src_addr: Source MAC address of the EAPOL packet
* @buf: Pointer to the beginning of the EAPOL data (EAPOL header)
* @len: Length of the EAPOL frame
* Returns: 1 = WPA EAPOL-Key processed, 0 = not a WPA EAPOL-Key, -1 failure
*
* This function is called for each received EAPOL frame. Other than EAPOL-Key
* frames can be skipped if filtering is done elsewhere. wpa_sm_rx_eapol() is
* only processing WPA and WPA2 EAPOL-Key frames.
*
* The received EAPOL-Key packets are validated and valid packets are replied
* to. In addition, key material (PTK, GTK) is configured at the end of a
* successful key handshake.
* buf begin from version, so remove mac header ,snap header and ether_type
*/
int wpa_sm_rx_eapol(u8 *src_addr, u8 *buf, u32 len)
{
struct wpa_sm *sm = &gWpaSm;
size_t plen, data_len, key_data_len;
struct ieee802_1x_hdr *hdr;
struct wpa_eapol_key *key;
struct wpa_eapol_key_192 *key192;
u16 key_info, ver;
u8 *tmp;
int ret = -1;
size_t mic_len, keyhdrlen;
u8 *key_data;
mic_len = wpa_mic_len(sm->key_mgmt, sm->pmk_len);
keyhdrlen = mic_len == 24 ? sizeof(*key192) : sizeof(*key);
if (len < sizeof(*hdr) + keyhdrlen) {
wpa_printf(MSG_DEBUG, "WPA: EAPOL frame too short to be a WPA "
"EAPOL-Key (len %lu, expecting at least %lu)",
(unsigned long) len,
(unsigned long) sizeof(*hdr) + sizeof(*key));
return 0;
}
tmp = buf;
hdr = (struct ieee802_1x_hdr *) tmp;
key = (struct wpa_eapol_key *) (hdr + 1);
key192 = (struct wpa_eapol_key_192 *)
(tmp + sizeof(struct ieee802_1x_hdr));
if (mic_len == 24)
key_data = (u8 *) (key192 + 1);
else
key_data = (u8 *) (key + 1);
plen = be_to_host16(hdr->length);
data_len = plen + sizeof(*hdr);
wpa_printf(MSG_DEBUG, "IEEE 802.1X RX: version=%d type=%d length=%d",
hdr->version, hdr->type, plen);
if (hdr->version < EAPOL_VERSION) {
/* TODO: backwards compatibility */
}
if (hdr->type != IEEE802_1X_TYPE_EAPOL_KEY) {
wpa_printf(MSG_DEBUG, "WPA: EAPOL frame (type %u) discarded, "
"not a Key frame", hdr->type);
ret = 0;
goto out;
}
if (plen > len - sizeof(*hdr) || plen < keyhdrlen) {
wpa_printf(MSG_DEBUG, "WPA: EAPOL frame payload size %lu "
"invalid (frame size %lu)",
(unsigned long) plen, (unsigned long) len);
ret = 0;
goto out;
}
if (key->type != EAPOL_KEY_TYPE_WPA && key->type != EAPOL_KEY_TYPE_RSN) {
wpa_printf(MSG_DEBUG, "WPA: EAPOL-Key type (%d) unknown, "
"discarded", key->type);
ret = 0;
goto out;
}
wpa_hexdump(MSG_MSGDUMP, "WPA: RX EAPOL-Key", tmp, len);
if (data_len < len) {
wpa_printf(MSG_DEBUG, "WPA: ignoring %lu bytes after the IEEE "
"802.1X data", (unsigned long) len - data_len);
}
key_info = WPA_GET_BE16(key->key_info);
ver = key_info & WPA_KEY_INFO_TYPE_MASK;
if (ver != WPA_KEY_INFO_TYPE_HMAC_MD5_RC4 &&
#ifdef CONFIG_IEEE80211W
ver != WPA_KEY_INFO_TYPE_AES_128_CMAC &&
#endif
ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES &&
!wpa_use_akm_defined(sm->key_mgmt)) {
wpa_printf(MSG_DEBUG, "WPA: Unsupported EAPOL-Key descriptor "
"version %d.", ver);
goto out;
}
if (wpa_use_akm_defined(sm->key_mgmt) &&
ver != WPA_KEY_INFO_TYPE_AKM_DEFINED) {
wpa_msg(NULL, MSG_INFO,
"RSN: Unsupported EAPOL-Key descriptor version %d (expected AKM defined = 0)",
ver);
goto out;
}
#ifdef CONFIG_IEEE80211W
if (wpa_key_mgmt_sha256(sm->key_mgmt)) {
if (ver != WPA_KEY_INFO_TYPE_AES_128_CMAC &&
!wpa_use_akm_defined(sm->key_mgmt)) {
goto out;
}
} else
#endif
if (sm->pairwise_cipher == WPA_CIPHER_CCMP &&
!wpa_use_akm_defined(sm->key_mgmt) &&
ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES ) {
wpa_printf(MSG_DEBUG, "WPA: CCMP is used, but EAPOL-Key "
"descriptor version (%d) is not 2.", ver);
if (sm->group_cipher != WPA_CIPHER_CCMP &&
!(key_info & WPA_KEY_INFO_KEY_TYPE)) {
/* Earlier versions of IEEE 802.11i did not explicitly
* require version 2 descriptor for all EAPOL-Key
* packets, so allow group keys to use version 1 if
* CCMP is not used for them. */
wpa_printf(MSG_DEBUG, "WPA: Backwards compatibility: "
"allow invalid version for non-CCMP group "
"keys");
} else if (ver == WPA_KEY_INFO_TYPE_AES_128_CMAC) {
wpa_printf(MSG_DEBUG,
"WPA: Interoperability workaround: allow incorrect (should have been HMAC-SHA1), but stronger (is AES-128-CMAC), descriptor version to be used");
} else
goto out;
}
#ifdef CONFIG_GCMP
if (sm->pairwise_cipher == WPA_CIPHER_GCMP &&
!wpa_use_akm_defined(sm->key_mgmt) &&
ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) {
wpa_msg(NULL, MSG_INFO,
"WPA: GCMP is used, but EAPOL-Key "
"descriptor version (%d) is not 2", ver);
goto out;
}
#endif
if (sm->rx_replay_counter_set &&
os_memcmp(key->replay_counter, sm->rx_replay_counter,
WPA_REPLAY_COUNTER_LEN) <= 0) {
wpa_printf(MSG_DEBUG, "WPA: EAPOL-Key Replay Counter did not"
" increase - dropping packet");
goto out;
}
if (!(key_info & (WPA_KEY_INFO_ACK | WPA_KEY_INFO_SMK_MESSAGE))) {
wpa_printf(MSG_DEBUG, "WPA: No Ack bit in key_info");
goto out;
}
if (key_info & WPA_KEY_INFO_REQUEST) {
wpa_printf(MSG_DEBUG, "WPA: EAPOL-Key with Request bit - dropped");
goto out;
}
if ((key_info & WPA_KEY_INFO_MIC) &&
wpa_supplicant_verify_eapol_key_mic(sm, key192, ver, tmp, data_len))
goto out;
if (mic_len == 24)
key_data_len = WPA_GET_BE16(key192->key_data_length);
else
key_data_len = WPA_GET_BE16(key->key_data_length);
wpa_eapol_key_dump(sm, key, key_data_len, key192->key_mic, mic_len);
if (key_data_len > plen - keyhdrlen) {
wpa_printf(MSG_DEBUG, "WPA: Invalid EAPOL-Key "
"frame - key_data overflow (%d > %u)",
(unsigned int) key_data_len,
(unsigned int) (plen - keyhdrlen));
goto out;
}
if (sm->proto == WPA_PROTO_RSN &&
(key_info & WPA_KEY_INFO_ENCR_KEY_DATA) && mic_len) {
/*
* Only decrypt the Key Data field if the frame's authenticity
* was verified. When using AES-SIV (FILS), the MIC flag is not
* set, so this check should only be performed if mic_len != 0
* which is the case in this code branch.
*/
if (!(key_info & WPA_KEY_INFO_MIC)) {
wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
"WPA: Ignore EAPOL-Key with encrypted but unauthenticated data");
goto out;
}
if (wpa_supplicant_decrypt_key_data(sm, key, ver, key_data,
&key_data_len))
goto out;
}
if (key_info & WPA_KEY_INFO_KEY_TYPE) {
if (key_info & WPA_KEY_INFO_KEY_INDEX_MASK) {
wpa_printf(MSG_DEBUG, "WPA: Ignored EAPOL-Key "
"(Pairwise) with non-zero key index");
goto out;
}
if (key_info & WPA_KEY_INFO_MIC) {
/* 3/4 4-Way Handshake */
wpa_supplicant_process_3_of_4(sm, key, ver, key_data,
key_data_len);
} else {
/* 1/4 4-Way Handshake */
sm->eapol1_count++;
if (sm->eapol1_count > MAX_EAPOL_RETRIES) {
wpa_printf(MSG_INFO, "EAPOL1 received for %d times, sending deauth", sm->eapol1_count);
esp_wifi_internal_issue_disconnect(WLAN_REASON_4WAY_HANDSHAKE_TIMEOUT);
goto out;
}
wpa_supplicant_process_1_of_4(sm, src_addr, key,
ver, key_data,
key_data_len);
}
} else {
if (key_info & WPA_KEY_INFO_MIC) {
/* 1/2 Group Key Handshake */
wpa_supplicant_process_1_of_2(sm, src_addr, key,
key_data, key_data_len,
ver);
} else {
wpa_printf(MSG_DEBUG, "WPA: EAPOL-Key (Group) "
"without Mic bit - dropped");
}
}
ret = 1;
out:
return ret;
}
/**
* wpa_supplicant_set_state - Set current connection state
* @wpa_s: Pointer to wpa_supplicant data
* @state: The new connection state
*
* This function is called whenever the connection state changes, e.g.,
* association is completed for WPA/WPA2 4-Way Handshake is started.
*/
void wpa_sm_set_state(enum wpa_states state)
{
struct wpa_sm *sm = &gWpaSm;
if(WPA_MIC_FAILURE==WPA_SM_STATE(sm))
eloop_cancel_timeout(wpa_supplicant_stop_countermeasures, NULL, NULL);
sm->wpa_state= state;
}
/**
* wpa_sm_set_pmk - Set PMK
* @sm: Pointer to WPA state machine data from wpa_sm_init()
* @pmk: The new PMK
* @pmk_len: The length of the new PMK in bytes
* @bssid: AA to add into PMKSA cache or %NULL to not cache the PMK
*
* Configure the PMK for WPA state machine.
*/
void wpa_sm_set_pmk(struct wpa_sm *sm, const u8 *pmk, size_t pmk_len,
const u8 *pmkid, const u8 *bssid)
{
if (sm == NULL)
return;
sm->pmk_len = pmk_len;
os_memcpy(sm->pmk, pmk, pmk_len);
#ifdef CONFIG_IEEE80211R
/* Set XXKey to be PSK for FT key derivation */
sm->xxkey_len = pmk_len;
os_memcpy(sm->xxkey, pmk, pmk_len);
#endif /* CONFIG_IEEE80211R */
if (bssid) {
pmksa_cache_add(sm->pmksa, pmk, pmk_len, pmkid, NULL, 0,
bssid, sm->own_addr,
sm->network_ctx, sm->key_mgmt);
}
}
/**
* wpa_sm_set_pmk_from_pmksa - Set PMK based on the current PMKSA
* @sm: Pointer to WPA state machine data from wpa_sm_init()
*
* Take the PMK from the current PMKSA into use. If no PMKSA is active, the PMK
* will be cleared.
*/
void wpa_sm_set_pmk_from_pmksa(struct wpa_sm *sm)
{
if (sm == NULL)
return;
if (sm->cur_pmksa) {
sm->pmk_len = sm->cur_pmksa->pmk_len;
os_memcpy(sm->pmk, sm->cur_pmksa->pmk, sm->pmk_len);
} else {
sm->pmk_len = PMK_LEN_MAX;
os_memset(sm->pmk, 0, PMK_LEN_MAX);
}
}
bool wpa_sm_init(void)
{
struct wpa_sm *sm = &gWpaSm;
u16 spp_attrubute = 0;
os_memset(sm, 0, sizeof(struct wpa_sm));
sm->eapol_version = DEFAULT_EAPOL_VERSION; /* DEFAULT_EAPOL_VERSION */
spp_attrubute = esp_wifi_get_spp_attrubute_internal(WIFI_IF_STA);
sm->spp_sup.capable = ((spp_attrubute & WPA_CAPABILITY_SPP_CAPABLE) ? SPP_AMSDU_CAP_ENABLE : SPP_AMSDU_CAP_DISABLE);
sm->spp_sup.require = ((spp_attrubute & WPA_CAPABILITY_SPP_REQUIRED) ? SPP_AMSDU_REQ_ENABLE : SPP_AMSDU_REQ_DISABLE);
wpa_sm_set_state(WPA_INACTIVE);
sm->pmksa = pmksa_cache_init(wpa_sm_pmksa_free_cb, sm, sm);
if (sm->pmksa == NULL) {
wpa_printf(MSG_ERROR,
"RSN: PMKSA cache initialization failed");
return false;
}
return true;
}
/**
* * wpa_sm_deinit - Deinitialize WPA state machine
* */
void wpa_sm_deinit(void)
{
struct wpa_sm *sm = &gWpaSm;
pmksa_cache_deinit(sm->pmksa);
os_free(sm->ap_rsnxe);
sm->ap_rsnxe = NULL;
os_free(sm->assoc_rsnxe);
wpa_sm_drop_sa(sm);
sm->assoc_rsnxe = NULL;
}
#ifdef ESP_SUPPLICANT
/**
* wpa_sm_notify_assoc - Notify WPA state machine about association
* @sm: Pointer to WPA state machine data from wpa_sm_init()
* @bssid: The BSSID of the new association
*
* This function is called to let WPA state machine know that the connection
* was established.
*/
void wpa_sm_notify_assoc(struct wpa_sm *sm, const u8 *bssid)
{
int clear_keys = 1;
if (sm == NULL)
return;
wpa_printf(MSG_DEBUG,
"WPA: Association event - clear replay counter");
os_memcpy(sm->bssid, bssid, ETH_ALEN);
os_memset(sm->rx_replay_counter, 0, WPA_REPLAY_COUNTER_LEN);
sm->rx_replay_counter_set = 0;
sm->renew_snonce = 1;
#ifdef CONFIG_IEEE80211R
if (wpa_ft_is_completed(sm)) {
/*
* Clear portValid to kick EAPOL state machine to re-enter
* AUTHENTICATED state to get the EAPOL port Authorized.
*/
wpa_supplicant_key_neg_complete(sm, sm->bssid, 1);
/* Prepare for the next transition */
wpa_ft_prepare_auth_request(sm, NULL);
clear_keys = 0;
sm->ft_protocol = 1;
} else {
sm->ft_protocol = 0;
}
#endif /* CONFIG_IEEE80211R */
if (clear_keys) {
/*
* IEEE 802.11, 8.4.10: Delete PTK SA on (re)association if
* this is not part of a Fast BSS Transition.
*/
wpa_printf(MSG_DEBUG, "WPA: Clear old PTK");
sm->ptk_set = 0;
os_memset(&sm->ptk, 0, sizeof(sm->ptk));
sm->tptk_set = 0;
os_memset(&sm->tptk, 0, sizeof(sm->tptk));
os_memset(&sm->gtk, 0, sizeof(sm->gtk));
os_memset(&sm->igtk, 0, sizeof(sm->igtk));
}
}
/**
* wpa_sm_notify_disassoc - Notify WPA state machine about disassociation
* @sm: Pointer to WPA state machine data from wpa_sm_init()
*
* This function is called to let WPA state machine know that the connection
* was lost. This will abort any existing pre-authentication session.
*/
void wpa_sm_notify_disassoc(struct wpa_sm *sm)
{
eloop_cancel_timeout(wpa_sm_rekey_ptk, sm, NULL);
pmksa_cache_clear_current(sm);
#ifdef CONFIG_IEEE80211R
sm->ft_reassoc_completed = 0;
sm->ft_protocol = 0;
#endif /* CONFIG_IEEE80211R */
/* Keys are not needed in the WPA state machine anymore */
wpa_sm_drop_sa(sm);
os_memset(sm->bssid, 0, ETH_ALEN);
}
void wpa_set_profile(u32 wpa_proto, u8 auth_mode)
{
struct wpa_sm *sm = &gWpaSm;
sm->proto = wpa_proto;
if (auth_mode == WPA2_AUTH_ENT) {
sm->key_mgmt = WPA_KEY_MGMT_IEEE8021X; /* for wpa2 enterprise */
} else if (auth_mode == WPA2_AUTH_ENT_SHA256) {
sm->key_mgmt = WPA_KEY_MGMT_IEEE8021X_SHA256; /* for wpa2 enterprise sha256 */
} else if (auth_mode == WPA2_AUTH_PSK_SHA256) {
sm->key_mgmt = WPA_KEY_MGMT_PSK_SHA256;
} else if (auth_mode == WPA3_AUTH_PSK) {
sm->key_mgmt = WPA_KEY_MGMT_SAE; /* for WPA3 PSK */
} else if (auth_mode == WAPI_AUTH_PSK) {
sm->key_mgmt = WPA_KEY_MGMT_WAPI_PSK; /* for WAPI PSK */
} else if (auth_mode == WPA2_AUTH_ENT_SHA384_SUITE_B) {
sm->key_mgmt = WPA_KEY_MGMT_IEEE8021X_SUITE_B_192;
} else if (auth_mode == WPA2_AUTH_FT_PSK) {
sm->key_mgmt = WPA_KEY_MGMT_FT_PSK;
} else if (auth_mode == WPA3_AUTH_OWE) {
sm->key_mgmt = WPA_KEY_MGMT_OWE;
} else if (auth_mode == WPA3_AUTH_PSK_EXT_KEY) {
sm->key_mgmt = WPA_KEY_MGMT_SAE_EXT_KEY; /* for WPA3 PSK */
} else if (auth_mode == WPA3_AUTH_DPP) {
sm->key_mgmt = WPA_KEY_MGMT_DPP;
} else {
sm->key_mgmt = WPA_KEY_MGMT_PSK; /* fixed to PSK for now */
}
}
void wpa_set_pmk(uint8_t *pmk, size_t pmk_length, const u8 *pmkid, bool cache_pmksa)
{
struct wpa_sm *sm = &gWpaSm;
int pmk_len;
if (wpa_key_mgmt_sha384(sm->key_mgmt))
pmk_len = PMK_LEN_SUITE_B_192;
else if (wpa_key_mgmt_sae(sm->key_mgmt))
pmk_len = pmk_length;
else
pmk_len = PMK_LEN;
memcpy(sm->pmk, pmk, pmk_len);
sm->pmk_len = pmk_len;
if (cache_pmksa) {
pmksa_cache_add(sm->pmksa, pmk, PMK_LEN, pmkid, NULL, 0,
sm->bssid, sm->own_addr,
sm->network_ctx, sm->key_mgmt);
}
}
int wpa_set_bss(char *macddr, char * bssid, u8 pairwise_cipher, u8 group_cipher, char *passphrase, u8 *ssid, size_t ssid_len)
{
int res = 0;
struct wpa_sm *sm = &gWpaSm;
bool use_pmk_cache = !esp_wifi_skip_supp_pmkcaching();
u8 assoc_rsnxe[20];
size_t assoc_rsnxe_len = sizeof(assoc_rsnxe);
/* Incase AP has changed it's SSID, don't try with PMK caching for SAE connection */
/* Ideally we should use network_ctx for this purpose however currently network profile block
* is part of libraries,
* TODO Correct this in future during NVS restructuring */
if ((sm->key_mgmt == WPA_KEY_MGMT_SAE ||
sm->key_mgmt == WPA_KEY_MGMT_SAE_EXT_KEY) &&
(os_memcmp(sm->bssid, bssid, ETH_ALEN) == 0) &&
(os_memcmp(sm->ssid, ssid, ssid_len) != 0)) {
use_pmk_cache = false;
}
sm->pairwise_cipher = BIT(pairwise_cipher);
sm->group_cipher = BIT(group_cipher);
sm->rx_replay_counter_set = 0; //init state not intall replay counter value
memset(sm->rx_replay_counter, 0, WPA_REPLAY_COUNTER_LEN);
sm->wpa_ptk_rekey = 0;
sm->renew_snonce = 1;
memcpy(sm->own_addr, macddr, ETH_ALEN);
memcpy(sm->bssid, bssid, ETH_ALEN);
sm->ap_notify_completed_rsne = esp_wifi_sta_is_ap_notify_completed_rsne_internal();
sm->use_ext_key_id = (sm->proto == WPA_PROTO_WPA);
pmksa_cache_clear_current(sm);
sm->sae_pwe = esp_wifi_get_config_sae_pwe_h2e_internal(WIFI_IF_STA);
struct rsn_pmksa_cache_entry *pmksa = NULL;
if (use_pmk_cache) {
pmksa = pmksa_cache_get(sm->pmksa, (const u8 *)bssid, NULL, NULL);
if (pmksa && (pmksa->akmp != sm->key_mgmt)) {
use_pmk_cache = false;
}
}
if (wpa_key_mgmt_supports_caching(sm->key_mgmt) && use_pmk_cache) {
pmksa_cache_set_current(sm, NULL, (const u8*) bssid, 0, 0);
wpa_sm_set_pmk_from_pmksa(sm);
} else {
if (pmksa) {
pmksa_cache_flush(sm->pmksa, NULL, pmksa->pmk, pmksa->pmk_len);
}
}
sm->eapol1_count = 0;
#ifdef CONFIG_IEEE80211W
if (esp_wifi_sta_pmf_enabled()) {
wifi_config_t wifi_cfg;
wifi_cipher_type_t mgmt_cipher = esp_wifi_sta_get_mgmt_group_cipher();
esp_wifi_get_config(WIFI_IF_STA, &wifi_cfg);
sm->pmf_cfg = wifi_cfg.sta.pmf_cfg;
sm->mgmt_group_cipher = cipher_type_map_public_to_supp(mgmt_cipher);
if (sm->mgmt_group_cipher == WPA_CIPHER_NONE) {
wpa_printf(MSG_ERROR, "mgmt_cipher %d not supported", mgmt_cipher);
return -1;
}
#ifdef CONFIG_SUITEB192
extern bool g_wpa_suiteb_certification;
if (g_wpa_suiteb_certification) {
if (sm->mgmt_group_cipher != WPA_CIPHER_BIP_GMAC_256) {
wpa_printf(MSG_ERROR, "suite-b 192bit certification, only GMAC256 is supported");
return -1;
}
if (sm->group_cipher != WPA_CIPHER_GCMP_256) {
wpa_printf(MSG_ERROR, "suite-b 192bit certification, only group GCMP256 is supported for group data cipher.");
return -1;
}
if (sm->pairwise_cipher != WPA_CIPHER_GCMP_256) {
wpa_printf(MSG_ERROR,"suite-b 192bit certification, only group GCMP256 is supported for pairwise cipher");
return -1;
}
if (sm->key_mgmt != WPA_KEY_MGMT_IEEE8021X_SUITE_B_192) {
wpa_printf(MSG_ERROR, "suite-b 192bit certification, 192bit akm supported");
return -1;
}
}
#endif
} else {
memset(&sm->pmf_cfg, 0, sizeof(sm->pmf_cfg));
sm->mgmt_group_cipher = WPA_CIPHER_NONE;
}
#endif
#ifdef CONFIG_IEEE80211R
if (sm->key_mgmt == WPA_KEY_MGMT_FT_PSK) {
const u8 *ie, *md = NULL;
struct wpa_bss *bss = wpa_bss_get_bssid(&g_wpa_supp, (uint8_t *)bssid);
if (!bss) {
return -1;
}
ie = wpa_bss_get_ie(bss, WLAN_EID_MOBILITY_DOMAIN);
if (ie && ie[1] >= MOBILITY_DOMAIN_ID_LEN)
md = ie + 2;
if (os_memcmp(md, sm->mobility_domain, MOBILITY_DOMAIN_ID_LEN) != 0) {
/* Reset Auth IE here */
esp_wifi_unset_appie_internal(WIFI_APPIE_RAM_STA_AUTH);
esp_wifi_unset_appie_internal(WIFI_APPIE_ASSOC_REQ);
sm->ft_protocol = 0;
}
wpa_sm_set_ft_params(sm, ie, ie ? 2 + ie[1] : 0);
} else {
/* Reset FT parameters */
wpa_sm_set_ft_params(sm, NULL, 0);
esp_wifi_unset_appie_internal(WIFI_APPIE_RAM_STA_AUTH);
esp_wifi_unset_appie_internal(WIFI_APPIE_ASSOC_REQ);
}
#endif
set_assoc_ie(assoc_ie_buf); /* use static buffer */
res = wpa_gen_wpa_ie(sm, sm->assoc_wpa_ie, sm->assoc_wpa_ie_len);
if (res < 0)
return -1;
sm->assoc_wpa_ie_len = res;
const u8 *rsnxe;
rsnxe = esp_wifi_sta_get_rsnxe((u8*)bssid);
wpa_sm_set_ap_rsnxe(rsnxe, rsnxe ? (rsnxe[1] + 2) : 0);
res = wpa_gen_rsnxe(sm, assoc_rsnxe, assoc_rsnxe_len);
if (res < 0)
return -1;
assoc_rsnxe_len = res;
res = wpa_sm_set_assoc_rsnxe(sm, assoc_rsnxe, assoc_rsnxe_len);
if (res < 0)
return -1;
esp_set_assoc_ie((uint8_t *)bssid, assoc_rsnxe, assoc_rsnxe_len, true);
os_memset(sm->ssid, 0, sizeof(sm->ssid));
os_memcpy(sm->ssid, ssid, ssid_len);
sm->ssid_len = ssid_len;
wpa_set_passphrase(passphrase, ssid, ssid_len);
#ifdef CONFIG_MBO
if (!mbo_bss_profile_match((u8 *)bssid))
return -1;
#endif
#ifndef CONFIG_SAE_PK
esp_wifi_sta_disable_sae_pk_internal();
#endif /* CONFIG_SAE_PK */
return 0;
}
/*
* Call after set ssid since we calc pmk inside this routine directly
*/
void
wpa_set_passphrase(char * passphrase, u8 *ssid, size_t ssid_len)
{
struct wifi_ssid *sta_ssid = esp_wifi_sta_get_prof_ssid_internal();
struct wpa_sm *sm = &gWpaSm;
if (passphrase == NULL) return;
/*
* Here only handle passphrase string. Need extra step to handle 32B, 64Hex raw
* PMK.
*/
if (sm->key_mgmt == WPA_KEY_MGMT_SAE ||
sm->key_mgmt == WPA_KEY_MGMT_OWE ||
sm->key_mgmt == WPA_KEY_MGMT_SAE_EXT_KEY ||
sm->key_mgmt == WPA_KEY_MGMT_DPP)
return;
/* This is really SLOW, so just re cacl while reset param */
if (esp_wifi_sta_get_reset_param_internal() != 0) {
// check it's psk
if (strlen((char *)esp_wifi_sta_get_prof_password_internal()) == 64) {
if (hexstr2bin((char *)esp_wifi_sta_get_prof_password_internal(),
esp_wifi_sta_get_ap_info_prof_pmk_internal(), PMK_LEN) != 0)
return;
} else {
pbkdf2_sha1((char *)esp_wifi_sta_get_prof_password_internal(), sta_ssid->ssid, (size_t)sta_ssid->len,
4096, esp_wifi_sta_get_ap_info_prof_pmk_internal(), PMK_LEN);
}
esp_wifi_sta_update_ap_info_internal();
esp_wifi_sta_set_reset_param_internal(0);
}
if (sm->key_mgmt == WPA_KEY_MGMT_IEEE8021X) {
/* TODO nothing */
} else {
memcpy(sm->pmk, esp_wifi_sta_get_ap_info_prof_pmk_internal(), PMK_LEN);
sm->pmk_len = PMK_LEN;
}
#ifdef CONFIG_IEEE80211R
/* Set XXKey to be PSK for FT key derivation */
sm->xxkey_len = PMK_LEN;
os_memcpy(sm->xxkey, sm->pmk, PMK_LEN);
#endif /* CONFIG_IEEE80211R */
}
void
set_assoc_ie(u8 * assoc_buf)
{
struct wpa_sm *sm = &gWpaSm;
sm->assoc_wpa_ie = assoc_buf + 2;
//wpa_ie insert OUI 4 byte before ver, but RSN have 2 bytes of RSN capability,
// so wpa_ie have two more bytes than rsn_ie
if ( sm->proto == WPA_PROTO_WPA)
sm->assoc_wpa_ie_len = ASSOC_IE_LEN;
else
sm->assoc_wpa_ie_len = ASSOC_IE_LEN - 2;
wpa_config_assoc_ie(sm->proto, assoc_buf, sm->assoc_wpa_ie_len);
}
int wpa_sm_set_key(struct install_key *key_sm, enum wpa_alg alg,
u8 *addr, int key_idx, int set_tx,
u8 *seq, size_t seq_len,
u8 *key, size_t key_len,
enum key_flag key_flag)
{
struct wpa_sm *sm = &gWpaSm;
/*gtk or ptk both need check countermeasures*/
if (alg == WIFI_WPA_ALG_TKIP && key_idx == 0 && key_len == 32) {
/* Clear the MIC error counter when setting a new PTK. */
sm->mic_errors_seen = 0;
}
key_sm->keys_cleared = 0;
key_sm->alg = alg;
memcpy(key_sm->addr, addr, ETH_ALEN);
key_sm->key_idx = key_idx;
key_sm->set_tx = set_tx;
memcpy(key_sm->key, key, key_len);
wpa_install_key(alg, addr, key_idx, set_tx, seq, seq_len, key, key_len, key_flag);
return 0;
}
static int
wpa_sm_get_key(uint8_t *ifx, int *alg, u8 *addr, int *key_idx, u8 *key, size_t key_len, enum key_flag key_flag)
{
return wpa_get_key(ifx, alg, addr, key_idx, key, key_len, key_flag);
}
void wpa_supplicant_clr_countermeasures(u16 *pisunicast)
{
struct wpa_sm *sm = &gWpaSm;
sm->mic_errors_seen = 0;
wpa_printf(MSG_DEBUG, "WPA: TKIP countermeasures clean");
}
/*recovery from countermeasures state, countermeasures state is period that stop connection with ap
also used in wpa_init after connecting with ap
*/
void wpa_supplicant_stop_countermeasures(void *data, void *user_ctx)
{
struct wpa_sm *sm = &gWpaSm;
if (sm->countermeasures) {
sm->countermeasures = 0;
wpa_supplicant_clr_countermeasures(NULL);
eloop_cancel_timeout(wpa_supplicant_stop_countermeasures, NULL, NULL);
wpa_printf(MSG_DEBUG, "WPA: TKIP countermeasures stopped");
/*renew scan preocess, this isn't done now*/
}
wpa_sm_set_state(WPA_DISCONNECTED);
}
int wpa_michael_mic_failure(u16 isunicast)
{
struct wpa_sm *sm = &gWpaSm;
wpa_printf(MSG_DEBUG, "TKIP MIC failure occur");
if (sm->mic_errors_seen) {
/* Send the new MIC error report immediately since we are going
* to start countermeasures and AP better do the same.
*/
wpa_sm_set_state(WPA_TKIP_COUNTERMEASURES);
wpa_sm_key_request(sm, 1, isunicast);
/* initialize countermeasures */
sm->countermeasures = 1;
wpa_printf(MSG_DEBUG, "TKIP countermeasures started");
/*
* Need to wait for completion of request frame. We do not get
* any callback for the message completion, so just wait a
* short while and hope for the best. */
os_sleep(0, 10000);
/*deauthenticate AP*/
/*stop monitor next mic_failure timer,disconnect for 60sec, then stop contermeasures*/
eloop_cancel_timeout(wpa_supplicant_stop_countermeasures, NULL, NULL);
eloop_register_timeout(60, 0, wpa_supplicant_stop_countermeasures, NULL, NULL);
/* TODO: mark the AP rejected for 60 second. STA is
* allowed to associate with another AP.. */
} else {
sm->mic_errors_seen++;
wpa_sm_set_state(WPA_MIC_FAILURE);
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*/
eloop_cancel_timeout(wpa_supplicant_stop_countermeasures, NULL, NULL);
eloop_register_timeout(60, 0, wpa_supplicant_stop_countermeasures, NULL, NULL);
}
return 0;
}
/*
eapol tx callback function to make sure new key
install after 4-way handoff
*/
void eapol_txcb(uint8_t *eapol_payload, size_t len, bool tx_failure)
{
struct ieee802_1x_hdr *hdr;
struct wpa_eapol_key *key;
struct wpa_sm *sm = &gWpaSm;
u8 isdeauth = 0; //no_zero value is the reason for deauth
if (len < sizeof(struct ieee802_1x_hdr)) {
/* Invalid 802.1X header, ignore */
return;
}
hdr = (struct ieee802_1x_hdr *) eapol_payload;
if (hdr->type != IEEE802_1X_TYPE_EAPOL_KEY) {
/* Ignore EAPOL non-key frames */
return;
}
if (len < (sizeof(struct ieee802_1x_hdr) + sizeof(struct wpa_eapol_key))) {
wpa_printf(MSG_ERROR, "EAPOL TxDone with invalid payload len! (len - %zu)", len);
return;
}
key = (struct wpa_eapol_key *) (hdr + 1);
switch(WPA_SM_STATE(sm)) {
case WPA_FIRST_HALF_4WAY_HANDSHAKE:
case WPA_LAST_HALF_4WAY_HANDSHAKE:
if (WPA_GET_BE16(key->key_data_length) == 0 ||
(WPA_GET_BE16(key->key_info) & WPA_KEY_INFO_SECURE)) {
/* msg 4/4 Tx Done */
if (tx_failure) {
wpa_printf(MSG_ERROR, "Eapol message 4/4 tx failure, not installing keys");
return;
}
if (sm->txcb_flags & WPA_4_4_HANDSHAKE_BIT) {
sm->txcb_flags &= ~WPA_4_4_HANDSHAKE_BIT;
isdeauth = wpa_supplicant_send_4_of_4_txcallback(sm);
} else {
wpa_printf(MSG_DEBUG, "4/4 txcb, flags=%d", sm->txcb_flags);
}
} else {
/* msg 2/4 Tx Done */
wpa_printf(MSG_DEBUG, "2/4 txcb, flags=%d, txfail %d", sm->txcb_flags, tx_failure);
}
break;
case WPA_GROUP_HANDSHAKE:
if (sm->txcb_flags & WPA_GROUP_HANDSHAKE_BIT) {
sm->txcb_flags &= ~WPA_GROUP_HANDSHAKE_BIT;
} else {
wpa_printf(MSG_DEBUG, "2/2 txcb, flags=%d", sm->txcb_flags);
}
break;
case WPA_TKIP_COUNTERMEASURES: isdeauth=WLAN_REASON_MICHAEL_MIC_FAILURE;
break;
default: break;
}
if(isdeauth) {
wpa_sm_deauthenticate(sm, isdeauth);
}
}
bool wpa_sta_in_4way_handshake(void)
{
struct wpa_sm *sm = &gWpaSm;
if ( WPA_SM_STATE(sm) == WPA_MIC_FAILURE || WPA_SM_STATE(sm) == WPA_FIRST_HALF_4WAY_HANDSHAKE
|| WPA_SM_STATE(sm) == WPA_LAST_HALF_4WAY_HANDSHAKE) {
return true;
}
return false;
}
bool wpa_sta_is_cur_pmksa_set(void) {
struct wpa_sm *sm = &gWpaSm;
return (pmksa_cache_get_current(sm) != NULL);
}
bool wpa_sta_cur_pmksa_matches_akm(void) {
struct wpa_sm *sm = &gWpaSm;
struct rsn_pmksa_cache_entry *pmksa;
pmksa = pmksa_cache_get_current(sm);
return (pmksa != NULL &&
sm->key_mgmt == pmksa->akmp);
}
void wpa_sta_clear_curr_pmksa(void) {
struct wpa_sm *sm = &gWpaSm;
if (sm->pmksa)
pmksa_cache_flush(sm->pmksa, NULL, sm->pmk, sm->pmk_len);
pmksa_cache_clear_current(sm);
}
struct wpa_sm * get_wpa_sm(void)
{
return &gWpaSm;
}
int wpa_sm_set_ap_rsnxe(const u8 *ie, size_t len)
{
struct wpa_sm *sm = &gWpaSm;
os_free(sm->ap_rsnxe);
if (!ie || len == 0) {
wpa_hexdump(MSG_DEBUG, "WPA: set AP RSNXE", ie, len);
sm->ap_rsnxe = NULL;
sm->ap_rsnxe_len = 0;
} else {
wpa_hexdump(MSG_DEBUG, "WPA: set AP RSNXE", ie, len);
sm->ap_rsnxe = os_memdup(ie, len);
if (!sm->ap_rsnxe)
return -1;
sm->ap_rsnxe_len = len;
}
if (sm->ap_rsnxe != NULL) {
sm->sae_pwe = esp_wifi_get_config_sae_pwe_h2e_internal(WIFI_IF_STA);
#ifdef CONFIG_SAE_PK
const u8 *pw = (const u8 *)esp_wifi_sta_get_prof_password_internal();
if (esp_wifi_sta_get_config_sae_pk_internal() != WPA3_SAE_PK_MODE_DISABLED &&
sae_pk_valid_password((const char*)pw)) {
sm->sae_pk = true;
}
#endif /* CONFIG_SAE_PK */
}
return 0;
}
int wpa_sm_set_assoc_rsnxe(struct wpa_sm *sm, const u8 *ie, size_t len)
{
if (!sm)
return -1;
os_free(sm->assoc_rsnxe);
if (!ie || len == 0) {
sm->assoc_rsnxe = NULL;
sm->assoc_rsnxe_len = 0;
} else {
wpa_hexdump(MSG_DEBUG, "RSN: set own RSNXE", ie, len);
sm->assoc_rsnxe = os_memdup(ie, len);
if (!sm->assoc_rsnxe)
return -1;
sm->assoc_rsnxe_len = len;
}
return 0;
}
void wpa_sm_drop_sa(struct wpa_sm *sm)
{
wpa_printf(MSG_DEBUG, "WPA: Clear old PMK and PTK");
sm->ptk_set = 0;
sm->tptk_set = 0;
sm->pmk_len = 0;
os_memset(&sm->ptk, 0, sizeof(sm->ptk));
os_memset(&sm->tptk, 0, sizeof(sm->tptk));
os_memset(&sm->gtk, 0, sizeof(sm->gtk));
os_memset(&sm->igtk, 0, sizeof(sm->igtk));
}
#ifdef CONFIG_OWE_STA
struct wpabuf *owe_build_assoc_req(struct wpa_sm *sm, u16 group)
{
struct wpabuf *pub = NULL;
size_t prime_len;
if (group == OWE_DH_GRP19) {
prime_len = OWE_PRIME_LEN;
} else {
wpa_printf(MSG_ERROR, "OWE: Unsupported Diffie-Hellman group");
return NULL;
}
sm->owe_ecdh = crypto_ecdh_init(group);
if (!sm->owe_ecdh) {
wpa_printf(MSG_ERROR, "Initialization of ecdh failed");
return NULL;
}
sm->owe_group = group;
/* Get own public key */
pub = crypto_ecdh_get_pubkey(sm->owe_ecdh, 0);
pub = wpabuf_zeropad(pub, prime_len);
if (!pub) {
wpa_printf(MSG_ERROR, "Own public key is NULL");
goto fail;
}
wpa_hexdump_buf(MSG_DEBUG, "Own public key", pub);
if (sm->owe_ie) {
wpabuf_free(sm->owe_ie);
}
sm->owe_ie = wpabuf_alloc(5 + wpabuf_len(pub));
if (!sm->owe_ie) {
wpa_printf(MSG_ERROR, "OWE IE allocation failed");
goto fail;
}
/* Constructing the DH IE */
wpabuf_put_u8(sm->owe_ie, WLAN_EID_EXTENSION);
wpabuf_put_u8(sm->owe_ie, 1 + 2 + wpabuf_len(pub));
wpabuf_put_u8(sm->owe_ie, WLAN_EID_EXT_OWE_DH_PARAM);
wpabuf_put_le16(sm->owe_ie, group);
wpabuf_put_buf(sm->owe_ie, pub);
wpabuf_free(pub);
wpa_hexdump_buf(MSG_DEBUG, "OWE: Diffie-Hellman Parameter element", sm->owe_ie);
return (struct wpabuf *)wpabuf_head(sm->owe_ie);
fail:
wpabuf_free(pub);
crypto_ecdh_deinit(sm->owe_ecdh);
return NULL;
}
int owe_process_assoc_resp(const u8 *rsn_ie, size_t rsn_len, const uint8_t *dh_ie, size_t dh_len)
{
size_t prime_len=0,hash_len=0;
struct wpabuf * sh_secret = NULL, *pub = NULL, *hkey = NULL;
const char *info = "OWE Key Generation";
u8 pmkid[SHA256_MAC_LEN], prk[SHA256_MAC_LEN], pmk[SHA256_MAC_LEN];
const u8 *addr[2];
size_t len[2];
u16 group;
struct wpa_sm *sm;
sm = get_wpa_sm();
/* Deallocate the dh ie buffer constructed in owe_build_assoc_req */
wpabuf_free(sm->owe_ie);
sm->owe_ie = NULL;
struct wpa_ie_data *parsed_rsn_data;
parsed_rsn_data = os_zalloc(sizeof(struct wpa_ie_data));
if (!parsed_rsn_data) {
wpa_printf(MSG_ERROR, "Memory allocation failed");
return -1;
}
if (rsn_ie && rsn_len && wpa_parse_wpa_ie_rsn(rsn_ie, rsn_len + 2, parsed_rsn_data) != 0) {
goto fail;
}
if (!dh_ie && parsed_rsn_data->num_pmkid == 0) {
wpa_printf(MSG_ERROR, "OWE: Assoc response should either have pmkid or DH IE");
goto fail;
}
/* Check for PMK caching */
if (sm->cur_pmksa && parsed_rsn_data && parsed_rsn_data->num_pmkid == 1 && parsed_rsn_data->pmkid) {
if (os_memcmp(parsed_rsn_data->pmkid, sm->cur_pmksa->pmkid, OWE_PMKID_LEN) == 0) {
wpa_printf(MSG_DEBUG, "OWE: Using PMK caching");
wpa_sm_set_pmk_from_pmksa(sm);
goto done;
} else {
/* If PMKID mismatches, derive keys again */
wpa_printf(MSG_DEBUG, "OWE : Invalid PMKID in response");
}
}
if (dh_ie == NULL) {
wpa_printf(MSG_ERROR, "OWE: No Diffie Hellman IE in association response");
goto fail;
}
if (dh_ie && MIN_DH_LEN(dh_len)) {
wpa_printf(MSG_ERROR, "OWE: Invalid Diffie Hellman IE");
goto fail;
}
/* If STA or AP does not have PMKID, or PMKID mismatches, proceed with normal association */
dh_len += 2;
dh_ie += 3;
dh_len -=3;
group = WPA_GET_LE16(dh_ie);
/* Only group 19 is supported */
if ((group != sm->owe_group) || (group != OWE_DH_GRP19)) {
wpa_printf(MSG_ERROR, "OWE: Unexpected Diffie-Hellman group in response");
goto fail;
}
prime_len = OWE_PRIME_LEN;
/* Set peer's public key point and calculate shared secret */
sh_secret = crypto_ecdh_set_peerkey(sm->owe_ecdh, 0, dh_ie+2, dh_len-2);
sh_secret = wpabuf_zeropad(sh_secret, prime_len);
if (!sh_secret) {
wpa_printf(MSG_ERROR, "OWE: Invalid peer DH public key");
goto fail;
}
wpa_hexdump_buf_key(MSG_DEBUG, "OWE: DH shared secret", sh_secret);
pub = crypto_ecdh_get_pubkey(sm->owe_ecdh, 0);
if (!pub) {
wpa_printf(MSG_ERROR, "No own public key");
goto fail;
}
/* PMKID = Truncate-128(Hash(C | A)) */
addr[0] = wpabuf_head(pub);
len[0] = wpabuf_len(pub);
addr[1] = dh_ie + 2;
len[1] = dh_len - 2;
int res = sha256_vector(2, addr, len, pmkid);
if (res < 0 ) {
goto fail;
}
hash_len = SHA256_MAC_LEN;
pub = wpabuf_zeropad(pub, prime_len);
if (!pub) {
goto fail;
}
/* prk = HKDF-extract(C | A | group, z) */
hkey = wpabuf_alloc(wpabuf_len(pub) + dh_len - 2 + 2);
if (!hkey) {
goto fail;
}
wpabuf_put_buf(hkey, pub); /* C */
wpabuf_free(pub);
wpabuf_put_data(hkey, dh_ie + 2, dh_len - 2); /* A */
wpabuf_put_le16(hkey, sm->owe_group); /* group */
res = hmac_sha256(wpabuf_head(hkey), wpabuf_len(hkey), wpabuf_head(sh_secret), wpabuf_len(sh_secret), prk);
if (res < 0 ) {
goto fail;
}
hash_len = SHA256_MAC_LEN;
wpabuf_free(hkey);
wpabuf_clear_free(sh_secret);
wpa_hexdump_key(MSG_DEBUG, "OWE: prk", prk, hash_len);
/* PMK = HKDF-expand(prk, "OWE Key Generation", n) */
res = hmac_sha256_kdf(prk, hash_len, NULL, (const u8 *)info,
os_strlen(info), pmk, hash_len);
if (res < 0 ) {
goto fail;
}
forced_memzero(prk, SHA256_MAC_LEN);
wpa_hexdump(MSG_DEBUG, "OWE: PMKID", pmkid, OWE_PMKID_LEN);
os_memcpy(sm->pmk,pmk,hash_len);
sm->pmk_len = hash_len;
wpa_hexdump_key(MSG_DEBUG, "OWE: PMK", sm->pmk, sm->pmk_len);
pmksa_cache_add(sm->pmksa, sm->pmk, sm->pmk_len, pmkid, NULL, 0,
sm->bssid, sm->own_addr, sm->network_ctx, sm->key_mgmt);
done:
os_free(parsed_rsn_data);
return 0;
fail:
os_free(parsed_rsn_data);
wpabuf_free(pub);
wpabuf_free(hkey);
wpabuf_clear_free(sh_secret);
return -1;
}
#endif // CONFIG_OWE_STA
#endif // ESP_SUPPLICANT
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