OVMS3-idf/components/wpa_supplicant/src/common/wpa_common.c

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/*
* WPA/RSN - Shared functions for supplicant and authenticator
* Copyright (c) 2002-2008, 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.
*/
#ifdef ESP_SUPPLICANT
#include "utils/includes.h"
#include "utils/common.h"
#include "common/defs.h"
#include "common/ieee802_11_defs.h"
#include "common/wpa_common.h"
#include "rsn_supp/wpa.h"
#include "crypto/sha1.h"
#include "crypto/sha256.h"
#include "crypto/md5.h"
#define MD5_MAC_LEN 16
#ifndef CONFIG_NO_WPA2
static int rsn_selector_to_bitfield(const u8 *s)
{
if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_NONE)
return WPA_CIPHER_NONE;
if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_WEP40)
return WPA_CIPHER_WEP40;
if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_TKIP)
return WPA_CIPHER_TKIP;
if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_CCMP)
return WPA_CIPHER_CCMP;
if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_WEP104)
return WPA_CIPHER_WEP104;
#ifdef CONFIG_IEEE80211W
if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_AES_128_CMAC)
return WPA_CIPHER_AES_128_CMAC;
#endif /* CONFIG_IEEE80211W */
return 0;
}
static int rsn_key_mgmt_to_bitfield(const u8 *s)
{
if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_UNSPEC_802_1X)
return WPA_KEY_MGMT_IEEE8021X;
if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_PSK_OVER_802_1X)
return WPA_KEY_MGMT_PSK;
#ifdef CONFIG_IEEE80211R
if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_FT_802_1X)
return WPA_KEY_MGMT_FT_IEEE8021X;
if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_FT_PSK)
return WPA_KEY_MGMT_FT_PSK;
#endif /* CONFIG_IEEE80211R */
#ifdef CONFIG_IEEE80211W
if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_802_1X_SHA256)
return WPA_KEY_MGMT_IEEE8021X_SHA256;
if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_PSK_SHA256)
return WPA_KEY_MGMT_PSK_SHA256;
#endif /* CONFIG_IEEE80211W */
return 0;
}
static int wpa_selector_to_bitfield(const u8 *s)
{
if (RSN_SELECTOR_GET(s) == WPA_CIPHER_SUITE_NONE)
return WPA_CIPHER_NONE;
if (RSN_SELECTOR_GET(s) == WPA_CIPHER_SUITE_WEP40)
return WPA_CIPHER_WEP40;
if (RSN_SELECTOR_GET(s) == WPA_CIPHER_SUITE_TKIP)
return WPA_CIPHER_TKIP;
if (RSN_SELECTOR_GET(s) == WPA_CIPHER_SUITE_CCMP)
return WPA_CIPHER_CCMP;
if (RSN_SELECTOR_GET(s) == WPA_CIPHER_SUITE_WEP104)
return WPA_CIPHER_WEP104;
return 0;
}
static int wpa_key_mgmt_to_bitfield(const u8 *s)
{
if (RSN_SELECTOR_GET(s) == WPA_AUTH_KEY_MGMT_UNSPEC_802_1X)
return WPA_KEY_MGMT_IEEE8021X;
if (RSN_SELECTOR_GET(s) == WPA_AUTH_KEY_MGMT_PSK_OVER_802_1X)
return WPA_KEY_MGMT_PSK;
if (RSN_SELECTOR_GET(s) == WPA_AUTH_KEY_MGMT_NONE)
return WPA_KEY_MGMT_WPA_NONE;
return 0;
}
#endif /* CONFIG_NO_WPA2 */
/**
* wpa_parse_wpa_ie_rsn - Parse RSN IE
* @rsn_ie: Buffer containing RSN IE
* @rsn_ie_len: RSN IE buffer length (including IE number and length octets)
* @data: Pointer to structure that will be filled in with parsed data
* Returns: 0 on success, <0 on failure
*/
int wpa_parse_wpa_ie_rsn(const u8 *rsn_ie, size_t rsn_ie_len,
struct wpa_ie_data *data)
{
#ifndef CONFIG_NO_WPA2
const struct rsn_ie_hdr *hdr;
const u8 *pos;
int left;
int i, count;
memset(data, 0, sizeof(*data));
data->proto = WPA_PROTO_RSN;
data->pairwise_cipher = WPA_CIPHER_CCMP;
data->group_cipher = WPA_CIPHER_CCMP;
data->key_mgmt = WPA_KEY_MGMT_IEEE8021X;
data->capabilities = 0;
data->pmkid = NULL;
data->num_pmkid = 0;
data->mgmt_group_cipher = 0;
if (rsn_ie_len == 0) {
/* No RSN IE - fail silently */
return -1;
}
if (rsn_ie_len < sizeof(struct rsn_ie_hdr)) {
#ifdef DEBUG_PRINT
wpa_printf(MSG_DEBUG, "%s: ie len too short %lu",
__func__, (unsigned long) rsn_ie_len);
#endif
return -1;
}
hdr = (const struct rsn_ie_hdr *) rsn_ie;
if (hdr->elem_id != WLAN_EID_RSN ||
hdr->len != rsn_ie_len - 2 ||
WPA_GET_LE16(hdr->version) != RSN_VERSION) {
#ifdef DEBUG_PRINT
wpa_printf(MSG_DEBUG, "%s: malformed ie or unknown version",
__func__);
#endif
return -2;
}
pos = (const u8 *) (hdr + 1);
left = rsn_ie_len - sizeof(*hdr);
if (left >= RSN_SELECTOR_LEN) {
data->group_cipher = rsn_selector_to_bitfield(pos);
pos += RSN_SELECTOR_LEN;
left -= RSN_SELECTOR_LEN;
} else if (left > 0) {
#ifdef DEBUG_PRINT
wpa_printf(MSG_DEBUG, "%s: ie length mismatch, %u too much",
__func__, left);
#endif
return -3;
}
if (left >= 2) {
data->pairwise_cipher = 0;
count = WPA_GET_LE16(pos);
pos += 2;
left -= 2;
if (count == 0 || left < count * RSN_SELECTOR_LEN) {
#ifdef DEBUG_PRINT
wpa_printf(MSG_DEBUG, "%s: ie count botch (pairwise), "
"count %u left %u", __func__, count, left);
#endif
return -4;
}
for (i = 0; i < count; i++) {
data->pairwise_cipher |= rsn_selector_to_bitfield(pos);
pos += RSN_SELECTOR_LEN;
left -= RSN_SELECTOR_LEN;
}
} else if (left == 1) {
#ifdef DEBUG_PRINT
wpa_printf(MSG_DEBUG, "%s: ie too short (for key mgmt)",
__func__);
#endif
return -5;
}
if (left >= 2) {
data->key_mgmt = 0;
count = WPA_GET_LE16(pos);
pos += 2;
left -= 2;
if (count == 0 || left < count * RSN_SELECTOR_LEN) {
#ifdef DEBUG_PRINT
wpa_printf(MSG_DEBUG, "%s: ie count botch (key mgmt), "
"count %u left %u", __func__, count, left);
#endif
return -6;
}
for (i = 0; i < count; i++) {
data->key_mgmt |= rsn_key_mgmt_to_bitfield(pos);
pos += RSN_SELECTOR_LEN;
left -= RSN_SELECTOR_LEN;
}
} else if (left == 1) {
#ifdef DEBUG_PRINT
wpa_printf(MSG_DEBUG, "%s: ie too short (for capabilities)",
__func__);
#endif
return -7;
}
if (left >= 2) {
data->capabilities = WPA_GET_LE16(pos);
pos += 2;
left -= 2;
}
if (left >= 2) {
data->num_pmkid = WPA_GET_LE16(pos);
pos += 2;
left -= 2;
if (left < (int) data->num_pmkid * PMKID_LEN) {
#ifdef DEBUG_PRINT
wpa_printf(MSG_DEBUG, "%s: PMKID underflow "
"(num_pmkid=%lu left=%d)",
__func__, (unsigned long) data->num_pmkid,
left);
#endif
data->num_pmkid = 0;
return -9;
} else {
data->pmkid = pos;
pos += data->num_pmkid * PMKID_LEN;
left -= data->num_pmkid * PMKID_LEN;
}
}
if (left > 0) {
#ifdef DEBUG_PRINT
wpa_printf(MSG_DEBUG, "%s: ie has %u trailing bytes - ignored",
__func__, left);
#endif
}
return 0;
#else /* CONFIG_NO_WPA2 */
return -1;
#endif /* CONFIG_NO_WPA2 */
}
int wpa_parse_wpa_ie_wpa(const u8 *wpa_ie, size_t wpa_ie_len,
struct wpa_ie_data *data)
{
const struct wpa_ie_hdr *hdr;
const u8 *pos;
int left;
int i, count;
memset(data, 0, sizeof(*data));
data->proto = WPA_PROTO_WPA;
data->pairwise_cipher = WPA_CIPHER_TKIP;
data->group_cipher = WPA_CIPHER_TKIP;
data->key_mgmt = WPA_KEY_MGMT_IEEE8021X;
data->capabilities = 0;
data->pmkid = NULL;
data->num_pmkid = 0;
data->mgmt_group_cipher = 0;
if (wpa_ie_len == 0) {
/* No WPA IE - fail silently */
return -1;
}
if (wpa_ie_len < sizeof(struct wpa_ie_hdr)) {
wpa_printf(MSG_DEBUG, "%s: ie len too short %lu",
__func__, (unsigned long) wpa_ie_len);
return -1;
}
hdr = (const struct wpa_ie_hdr *) wpa_ie;
if (hdr->elem_id != WLAN_EID_VENDOR_SPECIFIC ||
hdr->len != wpa_ie_len - 2 ||
RSN_SELECTOR_GET(hdr->oui) != WPA_OUI_TYPE ||
WPA_GET_LE16(hdr->version) != WPA_VERSION) {
wpa_printf(MSG_DEBUG, "%s: malformed ie or unknown version",
__func__);
return -2;
}
pos = (const u8 *) (hdr + 1);
left = wpa_ie_len - sizeof(*hdr);
if (left >= WPA_SELECTOR_LEN) {
data->group_cipher = wpa_selector_to_bitfield(pos);
pos += WPA_SELECTOR_LEN;
left -= WPA_SELECTOR_LEN;
} else if (left > 0) {
wpa_printf(MSG_DEBUG, "%s: ie length mismatch, %u too much",
__func__, left);
return -3;
}
if (left >= 2) {
data->pairwise_cipher = 0;
count = WPA_GET_LE16(pos);
pos += 2;
left -= 2;
if (count == 0 || left < count * WPA_SELECTOR_LEN) {
wpa_printf(MSG_DEBUG, "%s: ie count botch (pairwise), "
"count %u left %u", __func__, count, left);
return -4;
}
for (i = 0; i < count; i++) {
data->pairwise_cipher |= wpa_selector_to_bitfield(pos);
pos += WPA_SELECTOR_LEN;
left -= WPA_SELECTOR_LEN;
}
} else if (left == 1) {
wpa_printf(MSG_DEBUG, "%s: ie too short (for key mgmt)",
__func__);
return -5;
}
if (left >= 2) {
data->key_mgmt = 0;
count = WPA_GET_LE16(pos);
pos += 2;
left -= 2;
if (count == 0 || left < count * WPA_SELECTOR_LEN) {
wpa_printf(MSG_DEBUG, "%s: ie count botch (key mgmt), "
"count %u left %u", __func__, count, left);
return -6;
}
for (i = 0; i < count; i++) {
data->key_mgmt |= wpa_key_mgmt_to_bitfield(pos);
pos += WPA_SELECTOR_LEN;
left -= WPA_SELECTOR_LEN;
}
} else if (left == 1) {
wpa_printf(MSG_DEBUG, "%s: ie too short (for capabilities)",
__func__);
return -7;
}
if (left >= 2) {
data->capabilities = WPA_GET_LE16(pos);
pos += 2;
left -= 2;
}
if (left > 0) {
wpa_printf(MSG_DEBUG, "%s: ie has %u trailing bytes - ignored",
__func__, left);
}
return 0;
}
/**
* wpa_eapol_key_mic - Calculate EAPOL-Key MIC
* @key: EAPOL-Key Key Confirmation Key (KCK)
* @ver: Key descriptor version (WPA_KEY_INFO_TYPE_*)
* @buf: Pointer to the beginning of the EAPOL header (version field)
* @len: Length of the EAPOL frame (from EAPOL header to the end of the frame)
* @mic: Pointer to the buffer to which the EAPOL-Key MIC is written
* Returns: 0 on success, -1 on failure
*
* Calculate EAPOL-Key MIC for an EAPOL-Key packet. The EAPOL-Key MIC field has
* to be cleared (all zeroes) when calling this function.
*
* Note: 'IEEE Std 802.11i-2004 - 8.5.2 EAPOL-Key frames' has an error in the
* description of the Key MIC calculation. It includes packet data from the
* beginning of the EAPOL-Key header, not EAPOL header. This incorrect change
* happened during final editing of the standard and the correct behavior is
* defined in the last draft (IEEE 802.11i/D10).
*/
int wpa_eapol_key_mic(const u8 *key, int ver, const u8 *buf, size_t len,
u8 *mic)
{
u8 hash[SHA1_MAC_LEN];
switch (ver) {
case WPA_KEY_INFO_TYPE_HMAC_MD5_RC4:
return hmac_md5(key, 16, buf, len, mic);
case WPA_KEY_INFO_TYPE_HMAC_SHA1_AES:
if (hmac_sha1(key, 16, buf, len, hash))
return -1;
memcpy(mic, hash, MD5_MAC_LEN);
break;
default:
return -1;
}
return 0;
}
int wpa_compare_rsn_ie(int ft_initial_assoc,
const u8 *ie1, size_t ie1len,
const u8 *ie2, size_t ie2len)
{
if (ie1 == NULL || ie2 == NULL)
return -1;
if (ie1len == ie2len && memcmp(ie1, ie2, ie1len) == 0)
return 0; /* identical IEs */
#ifdef CONFIG_IEEE80211R
if (ft_initial_assoc) {
struct wpa_ie_data ie1d, ie2d;
/*
* The PMKID-List in RSN IE is different between Beacon/Probe
* Response/(Re)Association Request frames and EAPOL-Key
* messages in FT initial mobility domain association. Allow
* for this, but verify that other parts of the RSN IEs are
* identical.
*/
if (wpa_parse_wpa_ie_rsn(ie1, ie1len, &ie1d) < 0 ||
wpa_parse_wpa_ie_rsn(ie2, ie2len, &ie2d) < 0)
return -1;
if (ie1d.proto == ie2d.proto &&
ie1d.pairwise_cipher == ie2d.pairwise_cipher &&
ie1d.group_cipher == ie2d.group_cipher &&
ie1d.key_mgmt == ie2d.key_mgmt &&
ie1d.capabilities == ie2d.capabilities &&
ie1d.mgmt_group_cipher == ie2d.mgmt_group_cipher)
return 0;
}
#endif /* CONFIG_IEEE80211R */
return -1;
}
#ifdef DEBUG_PRINT
/**
* wpa_cipher_txt - Convert cipher suite to a text string
* @cipher: Cipher suite (WPA_CIPHER_* enum)
* Returns: Pointer to a text string of the cipher suite name
*/
const char * wpa_cipher_txt(int cipher)
{
switch (cipher) {
case WPA_CIPHER_NONE:
return "NONE";
case WPA_CIPHER_WEP40:
return "WEP-40";
case WPA_CIPHER_WEP104:
return "WEP-104";
case WPA_CIPHER_TKIP:
return "TKIP";
case WPA_CIPHER_CCMP:
return "CCMP";
case WPA_CIPHER_CCMP | WPA_CIPHER_TKIP:
return "CCMP+TKIP";
default:
return "UNKNOWN";
}
}
#endif
/**
* wpa_pmk_to_ptk - Calculate PTK from PMK, addresses, and nonces
* @pmk: Pairwise master key
* @pmk_len: Length of PMK
* @label: Label to use in derivation
* @addr1: AA or SA
* @addr2: SA or AA
* @nonce1: ANonce or SNonce
* @nonce2: SNonce or ANonce
* @ptk: Buffer for pairwise transient key
* @ptk_len: Length of PTK
* @use_sha256: Whether to use SHA256-based KDF
*
* IEEE Std 802.11i-2004 - 8.5.1.2 Pairwise key hierarchy
* PTK = PRF-X(PMK, "Pairwise key expansion",
* Min(AA, SA) || Max(AA, SA) ||
* Min(ANonce, SNonce) || Max(ANonce, SNonce))
*
* STK = PRF-X(SMK, "Peer key expansion",
* Min(MAC_I, MAC_P) || Max(MAC_I, MAC_P) ||
* Min(INonce, PNonce) || Max(INonce, PNonce))
*/
void wpa_pmk_to_ptk(const u8 *pmk, size_t pmk_len, const char *label,
const u8 *addr1, const u8 *addr2,
const u8 *nonce1, const u8 *nonce2,
u8 *ptk, size_t ptk_len, int use_sha256)
{
u8 data[2 * ETH_ALEN + 2 * WPA_NONCE_LEN];
if (memcmp(addr1, addr2, ETH_ALEN) < 0) {
memcpy(data, addr1, ETH_ALEN);
memcpy(data + ETH_ALEN, addr2, ETH_ALEN);
} else {
memcpy(data, addr2, ETH_ALEN);
memcpy(data + ETH_ALEN, addr1, ETH_ALEN);
}
if (memcmp(nonce1, nonce2, WPA_NONCE_LEN) < 0) {
memcpy(data + 2 * ETH_ALEN, nonce1, WPA_NONCE_LEN);
memcpy(data + 2 * ETH_ALEN + WPA_NONCE_LEN, nonce2,
WPA_NONCE_LEN);
} else {
memcpy(data + 2 * ETH_ALEN, nonce2, WPA_NONCE_LEN);
memcpy(data + 2 * ETH_ALEN + WPA_NONCE_LEN, nonce1,
WPA_NONCE_LEN);
}
#ifdef CONFIG_IEEE80211W
if (use_sha256) {
sha256_prf(pmk, pmk_len, label, data, sizeof(data),
ptk, ptk_len);
}
else
#endif /* CONFIG_IEEE80211W */
{
sha1_prf(pmk, pmk_len, label, data, sizeof(data), ptk, ptk_len);
}
wpa_printf(MSG_DEBUG, "WPA: PTK derivation - A1=" MACSTR " A2=" MACSTR"\n",
MAC2STR(addr1), MAC2STR(addr2));
wpa_hexdump(MSG_MSGDUMP, "WPA: PMK", pmk, pmk_len);
wpa_hexdump(MSG_MSGDUMP, "WPA: PTK", ptk, ptk_len);
}
/**
* rsn_pmkid - Calculate PMK identifier
* @pmk: Pairwise master key
* @pmk_len: Length of pmk in bytes
* @aa: Authenticator address
* @spa: Supplicant address
* @pmkid: Buffer for PMKID
* @use_sha256: Whether to use SHA256-based KDF
*
* IEEE Std 802.11i-2004 - 8.5.1.2 Pairwise key hierarchy
* PMKID = HMAC-SHA1-128(PMK, "PMK Name" || AA || SPA)
*/
void rsn_pmkid(const u8 *pmk, size_t pmk_len, const u8 *aa, const u8 *spa,
u8 *pmkid, int use_sha256)
{
char title[9];
const u8 *addr[3];
const size_t len[3] = { 8, ETH_ALEN, ETH_ALEN };
unsigned char hash[SHA256_MAC_LEN];
os_memcpy(title, "PMK Name", sizeof("PMK Name"));
addr[0] = (u8 *) title;
addr[1] = aa;
addr[2] = spa;
#ifdef CONFIG_IEEE80211W
if (use_sha256) {
hmac_sha256_vector(pmk, pmk_len, 3, addr, len, hash);
}
else
#endif /* CONFIG_IEEE80211W */
hmac_sha1_vector(pmk, pmk_len, 3, addr, len, hash);
memcpy(pmkid, hash, PMKID_LEN);
}
int wpa_cipher_key_len(int cipher)
{
switch (cipher) {
case WPA_CIPHER_CCMP:
case WPA_CIPHER_GCMP:
return 16;
case WPA_CIPHER_TKIP:
return 32;
case WPA_CIPHER_WEP104:
return 13;
case WPA_CIPHER_WEP40:
return 5;
}
return 0;
}
int wpa_cipher_to_alg(int cipher)
{
switch (cipher) {
case WPA_CIPHER_CCMP:
return WPA_ALG_CCMP;
case WPA_CIPHER_GCMP:
return WPA_ALG_GCMP;
case WPA_CIPHER_TKIP:
return WPA_ALG_TKIP;
case WPA_CIPHER_WEP104:
case WPA_CIPHER_WEP40:
return WPA_ALG_WEP;
}
return WPA_ALG_NONE;
}
u32 wpa_cipher_to_suite(int proto, int cipher)
{
if (cipher & WPA_CIPHER_CCMP)
return (proto == WPA_PROTO_RSN ?
RSN_CIPHER_SUITE_CCMP : WPA_CIPHER_SUITE_CCMP);
if (cipher & WPA_CIPHER_GCMP)
return RSN_CIPHER_SUITE_GCMP;
if (cipher & WPA_CIPHER_TKIP)
return (proto == WPA_PROTO_RSN ?
RSN_CIPHER_SUITE_TKIP : WPA_CIPHER_SUITE_TKIP);
if (cipher & WPA_CIPHER_WEP104)
return (proto == WPA_PROTO_RSN ?
RSN_CIPHER_SUITE_WEP104 : WPA_CIPHER_SUITE_WEP104);
if (cipher & WPA_CIPHER_WEP40)
return (proto == WPA_PROTO_RSN ?
RSN_CIPHER_SUITE_WEP40 : WPA_CIPHER_SUITE_WEP40);
if (cipher & WPA_CIPHER_NONE)
return (proto == WPA_PROTO_RSN ?
RSN_CIPHER_SUITE_NONE : WPA_CIPHER_SUITE_NONE);
return 0;
}
int rsn_cipher_put_suites(u8 *pos, int ciphers)
{
int num_suites = 0;
if (ciphers & WPA_CIPHER_CCMP) {
RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_CCMP);
pos += RSN_SELECTOR_LEN;
num_suites++;
}
if (ciphers & WPA_CIPHER_GCMP) {
RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_GCMP);
pos += RSN_SELECTOR_LEN;
num_suites++;
}
if (ciphers & WPA_CIPHER_TKIP) {
RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_TKIP);
pos += RSN_SELECTOR_LEN;
num_suites++;
}
if (ciphers & WPA_CIPHER_NONE) {
RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_NONE);
pos += RSN_SELECTOR_LEN;
num_suites++;
}
return num_suites;
}
int wpa_cipher_put_suites(u8 *pos, int ciphers)
{
int num_suites = 0;
if (ciphers & WPA_CIPHER_CCMP) {
RSN_SELECTOR_PUT(pos, WPA_CIPHER_SUITE_CCMP);
pos += WPA_SELECTOR_LEN;
num_suites++;
}
if (ciphers & WPA_CIPHER_TKIP) {
RSN_SELECTOR_PUT(pos, WPA_CIPHER_SUITE_TKIP);
pos += WPA_SELECTOR_LEN;
num_suites++;
}
if (ciphers & WPA_CIPHER_NONE) {
RSN_SELECTOR_PUT(pos, WPA_CIPHER_SUITE_NONE);
pos += WPA_SELECTOR_LEN;
num_suites++;
}
return num_suites;
}
#endif // ESP_SUPPLICANT