wpa.c

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#include <stdlib.h>
#include <stdio.h>
#ifndef CONFIG_NATIVE_WINDOWS
#include <netinet/in.h>
#endif /* CONFIG_NATIVE_WINDOWS */
#include <string.h>

#include "common.h"
#include "md5.h"
#include "sha1.h"
#include "rc4.h"
#include "aes_wrap.h"
#include "wpa.h"
#include "eloop.h"
#include "wpa_supplicant.h"
#include "config.h"
#include "l2_packet.h"
#include "eapol_sm.h"
#include "preauth.h"
#include "wpa_i.h"


static const int WPA_SELECTOR_LEN = 4;
static const u8 WPA_OUI_TYPE[] = { 0x00, 0x50, 0xf2, 1 };
static const u16 WPA_VERSION = 1;
static const u8 WPA_AUTH_KEY_MGMT_NONE[] = { 0x00, 0x50, 0xf2, 0 };
static const u8 WPA_AUTH_KEY_MGMT_UNSPEC_802_1X[] = { 0x00, 0x50, 0xf2, 1 };
static const u8 WPA_AUTH_KEY_MGMT_PSK_OVER_802_1X[] = { 0x00, 0x50, 0xf2, 2 };
static const u8 WPA_CIPHER_SUITE_NONE[] = { 0x00, 0x50, 0xf2, 0 };
static const u8 WPA_CIPHER_SUITE_WEP40[] = { 0x00, 0x50, 0xf2, 1 };
static const u8 WPA_CIPHER_SUITE_TKIP[] = { 0x00, 0x50, 0xf2, 2 };
static const u8 WPA_CIPHER_SUITE_WRAP[] = { 0x00, 0x50, 0xf2, 3 };
static const u8 WPA_CIPHER_SUITE_CCMP[] = { 0x00, 0x50, 0xf2, 4 };
static const u8 WPA_CIPHER_SUITE_WEP104[] = { 0x00, 0x50, 0xf2, 5 };

/* WPA IE version 1
 * 00-50-f2:1 (OUI:OUI type)
 * 0x01 0x00 (version; little endian)
 * (all following fields are optional:)
 * Group Suite Selector (4 octets) (default: TKIP)
 * Pairwise Suite Count (2 octets, little endian) (default: 1)
 * Pairwise Suite List (4 * n octets) (default: TKIP)
 * Authenticated Key Management Suite Count (2 octets, little endian)
 *    (default: 1)
 * Authenticated Key Management Suite List (4 * n octets)
 *    (default: unspec 802.1X)
 * WPA Capabilities (2 octets, little endian) (default: 0)
 */

struct wpa_ie_hdr {
        u8 elem_id;
        u8 len;
        u8 oui[3];
        u8 oui_type;
        u8 version[2];
} __attribute__ ((packed));


static const int RSN_SELECTOR_LEN = 4;
static const u16 RSN_VERSION = 1;
static const u8 RSN_AUTH_KEY_MGMT_UNSPEC_802_1X[] = { 0x00, 0x0f, 0xac, 1 };
static const u8 RSN_AUTH_KEY_MGMT_PSK_OVER_802_1X[] = { 0x00, 0x0f, 0xac, 2 };
static const u8 RSN_CIPHER_SUITE_NONE[] = { 0x00, 0x0f, 0xac, 0 };
static const u8 RSN_CIPHER_SUITE_WEP40[] = { 0x00, 0x0f, 0xac, 1 };
static const u8 RSN_CIPHER_SUITE_TKIP[] = { 0x00, 0x0f, 0xac, 2 };
static const u8 RSN_CIPHER_SUITE_WRAP[] = { 0x00, 0x0f, 0xac, 3 };
static const u8 RSN_CIPHER_SUITE_CCMP[] = { 0x00, 0x0f, 0xac, 4 };
static const u8 RSN_CIPHER_SUITE_WEP104[] = { 0x00, 0x0f, 0xac, 5 };

/* EAPOL-Key Key Data Encapsulation
 * GroupKey and STAKey require encryption, otherwise, encryption is optional.
 */
static const u8 RSN_KEY_DATA_GROUPKEY[] = { 0x00, 0x0f, 0xac, 1 };
static const u8 RSN_KEY_DATA_STAKEY[] = { 0x00, 0x0f, 0xac, 2 };
static const u8 RSN_KEY_DATA_MAC_ADDR[] = { 0x00, 0x0f, 0xac, 3 };
static const u8 RSN_KEY_DATA_PMKID[] = { 0x00, 0x0f, 0xac, 4 };

/* 1/4: PMKID
 * 2/4: RSN IE
 * 3/4: one or two RSN IEs + GTK IE (encrypted)
 * 4/4: empty
 * 1/2: GTK IE (encrypted)
 * 2/2: empty
 */

/* RSN IE version 1
 * 0x01 0x00 (version; little endian)
 * (all following fields are optional:)
 * Group Suite Selector (4 octets) (default: CCMP)
 * Pairwise Suite Count (2 octets, little endian) (default: 1)
 * Pairwise Suite List (4 * n octets) (default: CCMP)
 * Authenticated Key Management Suite Count (2 octets, little endian)
 *    (default: 1)
 * Authenticated Key Management Suite List (4 * n octets)
 *    (default: unspec 802.1X)
 * RSN Capabilities (2 octets, little endian) (default: 0)
 * PMKID Count (2 octets) (default: 0)
 * PMKID List (16 * n octets)
 */

struct rsn_ie_hdr {
        u8 elem_id; /* WLAN_EID_RSN */
        u8 len;
        u8 version[2];
} __attribute__ ((packed));


struct wpa_eapol_key {
        u8 type;
        /* Note: key_info, key_length, and key_data_length are unaligned */
        u8 key_info[2];
        u8 key_length[2];
        u8 replay_counter[WPA_REPLAY_COUNTER_LEN];
        u8 key_nonce[WPA_NONCE_LEN];
        u8 key_iv[16];
        u8 key_rsc[8];
        u8 key_id[8]; /* Reserved in IEEE 802.11i/RSN */
        u8 key_mic[16];
        u8 key_data_length[2];
        /* followed by key_data_length bytes of key_data */
} __attribute__ ((packed));

#define WPA_KEY_INFO_TYPE_MASK (BIT(0) | BIT(1) | BIT(2))
#define WPA_KEY_INFO_TYPE_HMAC_MD5_RC4 BIT(0)
#define WPA_KEY_INFO_TYPE_HMAC_SHA1_AES BIT(1)
#define WPA_KEY_INFO_KEY_TYPE BIT(3) /* 1 = Pairwise, 0 = Group key */
/* bit4..5 is used in WPA, but is reserved in IEEE 802.11i/RSN */
#define WPA_KEY_INFO_KEY_INDEX_MASK (BIT(4) | BIT(5))
#define WPA_KEY_INFO_KEY_INDEX_SHIFT 4
#define WPA_KEY_INFO_INSTALL BIT(6) /* pairwise */
#define WPA_KEY_INFO_TXRX BIT(6) /* group */
#define WPA_KEY_INFO_ACK BIT(7)
#define WPA_KEY_INFO_MIC BIT(8)
#define WPA_KEY_INFO_SECURE BIT(9)
#define WPA_KEY_INFO_ERROR BIT(10)
#define WPA_KEY_INFO_REQUEST BIT(11)
#define WPA_KEY_INFO_ENCR_KEY_DATA BIT(12) /* IEEE 802.11i/RSN only */



static 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";
        default:
                return "UNKNOWN";
        }
}


static const char * wpa_key_mgmt_txt(int key_mgmt, int proto)
{
        switch (key_mgmt) {
        case WPA_KEY_MGMT_IEEE8021X:
                return proto == WPA_PROTO_RSN ?
                        "WPA2/IEEE 802.1X/EAP" : "WPA/IEEE 802.1X/EAP";
        case WPA_KEY_MGMT_PSK:
                return proto == WPA_PROTO_RSN ?
                        "WPA2-PSK" : "WPA-PSK";
        case WPA_KEY_MGMT_NONE:
                return "NONE";
        case WPA_KEY_MGMT_IEEE8021X_NO_WPA:
                return "IEEE 802.1X (no WPA)";
        default:
                return "UNKNOWN";
        }
}


static int wpa_selector_to_bitfield(const u8 *s)
{
        if (memcmp(s, WPA_CIPHER_SUITE_NONE, WPA_SELECTOR_LEN) == 0)
                return WPA_CIPHER_NONE;
        if (memcmp(s, WPA_CIPHER_SUITE_WEP40, WPA_SELECTOR_LEN) == 0)
                return WPA_CIPHER_WEP40;
        if (memcmp(s, WPA_CIPHER_SUITE_TKIP, WPA_SELECTOR_LEN) == 0)
                return WPA_CIPHER_TKIP;
        if (memcmp(s, WPA_CIPHER_SUITE_CCMP, WPA_SELECTOR_LEN) == 0)
                return WPA_CIPHER_CCMP;
        if (memcmp(s, WPA_CIPHER_SUITE_WEP104, WPA_SELECTOR_LEN) == 0)
                return WPA_CIPHER_WEP104;
        return 0;
}


static int wpa_key_mgmt_to_bitfield(const u8 *s)
{
        if (memcmp(s, WPA_AUTH_KEY_MGMT_UNSPEC_802_1X, WPA_SELECTOR_LEN) == 0)
                return WPA_KEY_MGMT_IEEE8021X;
        if (memcmp(s, WPA_AUTH_KEY_MGMT_PSK_OVER_802_1X, WPA_SELECTOR_LEN) ==
            0)
                return WPA_KEY_MGMT_PSK;
        if (memcmp(s, WPA_AUTH_KEY_MGMT_NONE, WPA_SELECTOR_LEN) == 0)
                return WPA_KEY_MGMT_WPA_NONE;
        return 0;
}


static int rsn_selector_to_bitfield(const u8 *s)
{
        if (memcmp(s, RSN_CIPHER_SUITE_NONE, RSN_SELECTOR_LEN) == 0)
                return WPA_CIPHER_NONE;
        if (memcmp(s, RSN_CIPHER_SUITE_WEP40, RSN_SELECTOR_LEN) == 0)
                return WPA_CIPHER_WEP40;
        if (memcmp(s, RSN_CIPHER_SUITE_TKIP, RSN_SELECTOR_LEN) == 0)
                return WPA_CIPHER_TKIP;
        if (memcmp(s, RSN_CIPHER_SUITE_CCMP, RSN_SELECTOR_LEN) == 0)
                return WPA_CIPHER_CCMP;
        if (memcmp(s, RSN_CIPHER_SUITE_WEP104, RSN_SELECTOR_LEN) == 0)
                return WPA_CIPHER_WEP104;
        return 0;
}


static int rsn_key_mgmt_to_bitfield(const u8 *s)
{
        if (memcmp(s, RSN_AUTH_KEY_MGMT_UNSPEC_802_1X, RSN_SELECTOR_LEN) == 0)
                return WPA_KEY_MGMT_IEEE8021X;
        if (memcmp(s, RSN_AUTH_KEY_MGMT_PSK_OVER_802_1X, RSN_SELECTOR_LEN) ==
            0)
                return WPA_KEY_MGMT_PSK;
        return 0;
}


static 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;

        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;

        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 != GENERIC_INFO_ELEM ||
            hdr->len != wpa_ie_len - 2 ||
            memcmp(&hdr->oui, WPA_OUI_TYPE, WPA_SELECTOR_LEN) != 0 ||
            WPA_GET_LE16(hdr->version) != WPA_VERSION) {
                wpa_printf(MSG_DEBUG, "%s: malformed ie or unknown version",
                           __func__);
                return -1;
        }

        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 -1;
        }

        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 -1;
                }
                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 -1;
        }

        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 -1;
                }
                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 -1;
        }

        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;
}


static int wpa_parse_wpa_ie_rsn(const u8 *rsn_ie, size_t rsn_ie_len,
                                struct wpa_ie_data *data)
{
        const struct rsn_ie_hdr *hdr;
        const u8 *pos;
        int left;
        int i, count;

        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;

        if (rsn_ie_len == 0) {
                /* No RSN IE - fail silently */
                return -1;
        }

        if (rsn_ie_len < sizeof(struct rsn_ie_hdr)) {
                wpa_printf(MSG_DEBUG, "%s: ie len too short %lu",
                           __func__, (unsigned long) rsn_ie_len);
                return -1;
        }

        hdr = (const struct rsn_ie_hdr *) rsn_ie;

        if (hdr->elem_id != RSN_INFO_ELEM ||
            hdr->len != rsn_ie_len - 2 ||
            WPA_GET_LE16(hdr->version) != RSN_VERSION) {
                wpa_printf(MSG_DEBUG, "%s: malformed ie or unknown version",
                           __func__);
                return -1;
        }

        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) {
                wpa_printf(MSG_DEBUG, "%s: ie length mismatch, %u too much",
                           __func__, left);
                return -1;
        }

        if (left >= 2) {
                data->pairwise_cipher = 0;
                count = WPA_GET_LE16(pos);
                pos += 2;
                left -= 2;
                if (count == 0 || left < count * RSN_SELECTOR_LEN) {
                        wpa_printf(MSG_DEBUG, "%s: ie count botch (pairwise), "
                                   "count %u left %u", __func__, count, left);
                        return -1;
                }
                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) {
                wpa_printf(MSG_DEBUG, "%s: ie too short (for key mgmt)",
                           __func__);
                return -1;
        }

        if (left >= 2) {
                data->key_mgmt = 0;
                count = WPA_GET_LE16(pos);
                pos += 2;
                left -= 2;
                if (count == 0 || left < count * RSN_SELECTOR_LEN) {
                        wpa_printf(MSG_DEBUG, "%s: ie count botch (key mgmt), "
                                   "count %u left %u", __func__, count, left);
                        return -1;
                }
                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) {
                wpa_printf(MSG_DEBUG, "%s: ie too short (for capabilities)",
                           __func__);
                return -1;
        }

        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 < data->num_pmkid * PMKID_LEN) {
                        wpa_printf(MSG_DEBUG, "%s: PMKID underflow "
                                   "(num_pmkid=%d left=%d)",
                                   __func__, data->num_pmkid, left);
                        data->num_pmkid = 0;
                } else {
                        data->pmkid = pos;
                        pos += data->num_pmkid * PMKID_LEN;
                        left -= data->num_pmkid * PMKID_LEN;
                }
        }

        if (left > 0) {
                wpa_printf(MSG_DEBUG, "%s: ie has %u trailing bytes - ignored",
                           __func__, left);
        }

        return 0;
}


int wpa_parse_wpa_ie(const u8 *wpa_ie, size_t wpa_ie_len,
                     struct wpa_ie_data *data)
{
        if (wpa_ie_len >= 1 && wpa_ie[0] == RSN_INFO_ELEM)
                return wpa_parse_wpa_ie_rsn(wpa_ie, wpa_ie_len, data);
        else
                return wpa_parse_wpa_ie_wpa(wpa_ie, wpa_ie_len, data);
}


static int wpa_gen_wpa_ie_wpa(u8 *wpa_ie, size_t wpa_ie_len,
                              int pairwise_cipher, int group_cipher,
                              int key_mgmt)
{
        u8 *pos;
        struct wpa_ie_hdr *hdr;

        if (wpa_ie_len < sizeof(*hdr) + WPA_SELECTOR_LEN +
            2 + WPA_SELECTOR_LEN + 2 + WPA_SELECTOR_LEN)
                return -1;

        hdr = (struct wpa_ie_hdr *) wpa_ie;
        hdr->elem_id = GENERIC_INFO_ELEM;
        memcpy(&hdr->oui, WPA_OUI_TYPE, WPA_SELECTOR_LEN);
        WPA_PUT_LE16(hdr->version, WPA_VERSION);
        pos = (u8 *) (hdr + 1);

        if (group_cipher == WPA_CIPHER_CCMP) {
                memcpy(pos, WPA_CIPHER_SUITE_CCMP, WPA_SELECTOR_LEN);
        } else if (group_cipher == WPA_CIPHER_TKIP) {
                memcpy(pos, WPA_CIPHER_SUITE_TKIP, WPA_SELECTOR_LEN);
        } else if (group_cipher == WPA_CIPHER_WEP104) {
                memcpy(pos, WPA_CIPHER_SUITE_WEP104, WPA_SELECTOR_LEN);
        } else if (group_cipher == WPA_CIPHER_WEP40) {
                memcpy(pos, WPA_CIPHER_SUITE_WEP40, WPA_SELECTOR_LEN);
        } else {
                wpa_printf(MSG_WARNING, "Invalid group cipher (%d).",
                           group_cipher);
                return -1;
        }
        pos += WPA_SELECTOR_LEN;

        *pos++ = 1;
        *pos++ = 0;
        if (pairwise_cipher == WPA_CIPHER_CCMP) {
                memcpy(pos, WPA_CIPHER_SUITE_CCMP, WPA_SELECTOR_LEN);
        } else if (pairwise_cipher == WPA_CIPHER_TKIP) {
                memcpy(pos, WPA_CIPHER_SUITE_TKIP, WPA_SELECTOR_LEN);
        } else if (pairwise_cipher == WPA_CIPHER_NONE) {
                memcpy(pos, WPA_CIPHER_SUITE_NONE, WPA_SELECTOR_LEN);
        } else {
                wpa_printf(MSG_WARNING, "Invalid pairwise cipher (%d).",
                           pairwise_cipher);
                return -1;
        }
        pos += WPA_SELECTOR_LEN;

        *pos++ = 1;
        *pos++ = 0;
        if (key_mgmt == WPA_KEY_MGMT_IEEE8021X) {
                memcpy(pos, WPA_AUTH_KEY_MGMT_UNSPEC_802_1X, WPA_SELECTOR_LEN);
        } else if (key_mgmt == WPA_KEY_MGMT_PSK) {
                memcpy(pos, WPA_AUTH_KEY_MGMT_PSK_OVER_802_1X,
                       WPA_SELECTOR_LEN);
        } else if (key_mgmt == WPA_KEY_MGMT_WPA_NONE) {
                memcpy(pos, WPA_AUTH_KEY_MGMT_NONE, WPA_SELECTOR_LEN);
        } else {
                wpa_printf(MSG_WARNING, "Invalid key management type (%d).",
                           key_mgmt);
                return -1;
        }
        pos += WPA_SELECTOR_LEN;

        /* WPA Capabilities; use defaults, so no need to include it */

        hdr->len = (pos - wpa_ie) - 2;

        WPA_ASSERT(pos - wpa_ie <= wpa_ie_len);

        return pos - wpa_ie;
}


static int wpa_gen_wpa_ie_rsn(u8 *rsn_ie, size_t rsn_ie_len,
                              int pairwise_cipher, int group_cipher,
                              int key_mgmt, struct wpa_sm *sm)
{
        u8 *pos;
        struct rsn_ie_hdr *hdr;

        if (rsn_ie_len < sizeof(*hdr) + RSN_SELECTOR_LEN +
            2 + RSN_SELECTOR_LEN + 2 + RSN_SELECTOR_LEN + 2 +
            (sm->cur_pmksa ? 2 + PMKID_LEN : 0))
                return -1;

        hdr = (struct rsn_ie_hdr *) rsn_ie;
        hdr->elem_id = RSN_INFO_ELEM;
        WPA_PUT_LE16(hdr->version, RSN_VERSION);
        pos = (u8 *) (hdr + 1);

        if (group_cipher == WPA_CIPHER_CCMP) {
                memcpy(pos, RSN_CIPHER_SUITE_CCMP, RSN_SELECTOR_LEN);
        } else if (group_cipher == WPA_CIPHER_TKIP) {
                memcpy(pos, RSN_CIPHER_SUITE_TKIP, RSN_SELECTOR_LEN);
        } else if (group_cipher == WPA_CIPHER_WEP104) {
                memcpy(pos, RSN_CIPHER_SUITE_WEP104, RSN_SELECTOR_LEN);
        } else if (group_cipher == WPA_CIPHER_WEP40) {
                memcpy(pos, RSN_CIPHER_SUITE_WEP40, RSN_SELECTOR_LEN);
        } else {
                wpa_printf(MSG_WARNING, "Invalid group cipher (%d).",
                           group_cipher);
                return -1;
        }
        pos += RSN_SELECTOR_LEN;

        *pos++ = 1;
        *pos++ = 0;
        if (pairwise_cipher == WPA_CIPHER_CCMP) {
                memcpy(pos, RSN_CIPHER_SUITE_CCMP, RSN_SELECTOR_LEN);
        } else if (pairwise_cipher == WPA_CIPHER_TKIP) {
                memcpy(pos, RSN_CIPHER_SUITE_TKIP, RSN_SELECTOR_LEN);
        } else if (pairwise_cipher == WPA_CIPHER_NONE) {
                memcpy(pos, RSN_CIPHER_SUITE_NONE, RSN_SELECTOR_LEN);
        } else {
                wpa_printf(MSG_WARNING, "Invalid pairwise cipher (%d).",
                           pairwise_cipher);
                return -1;
        }
        pos += RSN_SELECTOR_LEN;

        *pos++ = 1;
        *pos++ = 0;
        if (key_mgmt == WPA_KEY_MGMT_IEEE8021X) {
                memcpy(pos, RSN_AUTH_KEY_MGMT_UNSPEC_802_1X, RSN_SELECTOR_LEN);
        } else if (key_mgmt == WPA_KEY_MGMT_PSK) {
                memcpy(pos, RSN_AUTH_KEY_MGMT_PSK_OVER_802_1X,
                       RSN_SELECTOR_LEN);
        } else {
                wpa_printf(MSG_WARNING, "Invalid key management type (%d).",
                           key_mgmt);
                return -1;
        }
        pos += RSN_SELECTOR_LEN;

        /* RSN Capabilities */
        *pos++ = 0;
        *pos++ = 0;

        if (sm->cur_pmksa) {
                /* PMKID Count (2 octets, little endian) */
                *pos++ = 1;
                *pos++ = 0;
                /* PMKID */
                memcpy(pos, sm->cur_pmksa->pmkid, PMKID_LEN);
                pos += PMKID_LEN;
        }

        hdr->len = (pos - rsn_ie) - 2;

        WPA_ASSERT(pos - rsn_ie <= rsn_ie_len);

        return pos - rsn_ie;
}


static int wpa_gen_wpa_ie(struct wpa_sm *sm, u8 *wpa_ie, size_t wpa_ie_len)
{
        if (sm->proto == WPA_PROTO_RSN)
                return wpa_gen_wpa_ie_rsn(wpa_ie, wpa_ie_len,
                                          sm->pairwise_cipher,
                                          sm->group_cipher,
                                          sm->key_mgmt, sm);
        else
                return wpa_gen_wpa_ie_wpa(wpa_ie, wpa_ie_len,
                                          sm->pairwise_cipher,
                                          sm->group_cipher,
                                          sm->key_mgmt);
}


static void wpa_pmk_to_ptk(const u8 *pmk, size_t pmk_len,
                           const u8 *addr1, const u8 *addr2,
                           const u8 *nonce1, const u8 *nonce2,
                           u8 *ptk, size_t ptk_len)
{
        u8 data[2 * ETH_ALEN + 2 * 32];

        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, 32) < 0) {
                memcpy(data + 2 * ETH_ALEN, nonce1, 32);
                memcpy(data + 2 * ETH_ALEN + 32, nonce2, 32);
        } else {
                memcpy(data + 2 * ETH_ALEN, nonce2, 32);
                memcpy(data + 2 * ETH_ALEN + 32, nonce1, 32);
        }

        sha1_prf(pmk, pmk_len, "Pairwise key expansion", data, sizeof(data),
                 ptk, ptk_len);

        wpa_hexdump_key(MSG_DEBUG, "WPA: PMK", pmk, pmk_len);
        wpa_hexdump_key(MSG_DEBUG, "WPA: PTK", ptk, ptk_len);
}


static void wpa_eapol_key_mic(const u8 *key, int ver,
                              const u8 *buf, size_t len, u8 *mic)
{
        if (ver == WPA_KEY_INFO_TYPE_HMAC_MD5_RC4) {
                hmac_md5(key, 16, buf, len, mic);
        } else if (ver == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) {
                u8 hash[SHA1_MAC_LEN];
                hmac_sha1(key, 16, buf, len, hash);
                memcpy(mic, hash, MD5_MAC_LEN);
        }
}


static void wpa_eapol_key_send(struct wpa_sm *sm, const u8 *kck,
                               int ver, const u8 *dest, u16 proto,
                               u8 *msg, size_t msg_len, u8 *key_mic)
{
        if (key_mic) {
                wpa_eapol_key_mic(kck, ver, msg, msg_len, key_mic);
        }
        wpa_hexdump(MSG_MSGDUMP, "WPA: TX EAPOL-Key", msg, msg_len);
        wpa_sm_ether_send(sm, dest, proto, msg, msg_len);
        eapol_sm_notify_tx_eapol_key(sm->eapol);
        free(msg);
}


void wpa_sm_key_request(struct wpa_sm *sm, int error, int pairwise)
{
        size_t rlen;
        struct wpa_eapol_key *reply;
        int key_info, ver;
        u8 bssid[ETH_ALEN], *rbuf;

        if (sm->pairwise_cipher == WPA_CIPHER_CCMP)
                ver = WPA_KEY_INFO_TYPE_HMAC_SHA1_AES;
        else
                ver = WPA_KEY_INFO_TYPE_HMAC_MD5_RC4;

        if (wpa_sm_get_bssid(sm, bssid) < 0) {
                wpa_printf(MSG_WARNING, "Failed to read BSSID for EAPOL-Key "
                           "request");
                return;
        }

        rbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY, NULL,
                                  sizeof(*reply), &rlen, (void *) &reply);
        if (rbuf == NULL)
                return;

        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_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);
        memcpy(reply->replay_counter, sm->request_counter,
               WPA_REPLAY_COUNTER_LEN);
        inc_byte_array(sm->request_counter, WPA_REPLAY_COUNTER_LEN);

        WPA_PUT_BE16(reply->key_data_length, 0);

        wpa_printf(MSG_INFO, "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, ver, bssid, ETH_P_EAPOL,
                           rbuf, rlen, key_info & WPA_KEY_INFO_MIC ?
                           reply->key_mic : NULL);
}


struct wpa_eapol_ie_parse {
        const u8 *wpa_ie;
        size_t wpa_ie_len;
        const u8 *rsn_ie;
        size_t rsn_ie_len;
        const u8 *pmkid;
        const u8 *gtk;
        size_t gtk_len;
};


static int wpa_supplicant_parse_generic(const u8 *pos, const u8 *end,
                                        struct wpa_eapol_ie_parse *ie)
{
        if (pos[1] == 0)
                return 1;

        if (pos[1] >= 6 &&
            memcmp(pos + 2, WPA_OUI_TYPE, WPA_SELECTOR_LEN) == 0 &&
            pos[2 + WPA_SELECTOR_LEN] == 1 &&
            pos[2 + WPA_SELECTOR_LEN + 1] == 0) {
                ie->wpa_ie = pos;
                ie->wpa_ie_len = pos[1] + 2;
                return 0;
        }

        if (pos + 1 + RSN_SELECTOR_LEN < end &&
            pos[1] >= RSN_SELECTOR_LEN + PMKID_LEN &&
            memcmp(pos + 2, RSN_KEY_DATA_PMKID, RSN_SELECTOR_LEN) == 0) {
                ie->pmkid = pos + 2 + RSN_SELECTOR_LEN;
                return 0;
        }

        if (pos[1] > RSN_SELECTOR_LEN + 2 &&
            memcmp(pos + 2, RSN_KEY_DATA_GROUPKEY, RSN_SELECTOR_LEN) == 0) {
                ie->gtk = pos + 2 + RSN_SELECTOR_LEN;
                ie->gtk_len = pos[1] - RSN_SELECTOR_LEN;
        }

        return 0;
}


static int wpa_supplicant_parse_ies(const u8 *buf, size_t len,
                                    struct wpa_eapol_ie_parse *ie)
{
        const u8 *pos, *end;
        int ret = 0;

        memset(ie, 0, sizeof(*ie));
        for (pos = buf, end = pos + len; pos + 1 < end; pos += 2 + pos[1]) {
                if (pos + 2 + pos[1] > end) {
                        wpa_printf(MSG_DEBUG, "WPA: EAPOL-Key Key Data "
                                   "underflow (ie=%d len=%d)", pos[0], pos[1]);
                        ret = -1;
                        break;
                }
                if (*pos == RSN_INFO_ELEM) {
                        ie->rsn_ie = pos;
                        ie->rsn_ie_len = pos[1] + 2;
                } else if (*pos == GENERIC_INFO_ELEM) {
                        ret = wpa_supplicant_parse_generic(pos, end, ie);
                        if (ret < 0)
                                break;
                        if (ret > 0) {
                                ret = 0;
                                break;
                        }
                } else {
                        wpa_hexdump(MSG_DEBUG, "WPA: Unrecognized EAPOL-Key "
                                    "Key Data IE", pos, 2 + pos[1]);
                }
        }

        return ret;
}


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, src_addr, pmkid);
                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 &&
            memcmp(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);
        } else if (sm->key_mgmt == WPA_KEY_MGMT_IEEE8021X && sm->eapol) {
                int res, pmk_len;
                pmk_len = PMK_LEN;
                res = eapol_sm_get_key(sm->eapol, sm->pmk, PMK_LEN);
#ifdef EAP_LEAP
                if (res) {
                        res = eapol_sm_get_key(sm->eapol, sm->pmk, 16);
                        pmk_len = 16;
                }
#endif /* EAP_LEAP */
                if (res == 0) {
                        wpa_hexdump_key(MSG_DEBUG, "WPA: PMK from EAPOL state "
                                        "machines", sm->pmk, pmk_len);
                        sm->pmk_len = pmk_len;
                        pmksa_cache_add(sm, sm->pmk, pmk_len, src_addr,
                                        sm->own_addr, sm->cur_ssid);
                        if (!sm->cur_pmksa && pmkid &&
                            pmksa_cache_get(sm, src_addr, pmkid)) {
                                wpa_printf(MSG_DEBUG, "RSN: the new PMK "
                                           "matches with the PMKID");
                                abort_cached = 0;
                        }
                } else {
                        wpa_msg(sm->ctx->ctx, MSG_WARNING,
                                "WPA: Failed to get master session key from "
                                "EAPOL state machines");
                        wpa_msg(sm->ctx->ctx, MSG_WARNING,
                                "WPA: Key handshake aborted");
                        if (sm->cur_pmksa) {
                                wpa_printf(MSG_DEBUG, "RSN: Cancelled PMKSA "
                                           "caching attempt");
                                sm->cur_pmksa = NULL;
                                abort_cached = 1;
                        } else {
                                return -1;
                        }
                }
        }

        if (abort_cached && sm->key_mgmt == WPA_KEY_MGMT_IEEE8021X) {
                /* 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);
                        free(buf);
                }

                return -1;
        }

        return 0;
}


static int wpa_supplicant_send_2_of_4(struct wpa_sm *sm,
                                      const unsigned char *src_addr,
                                      const struct wpa_eapol_key *key,
                                      int ver)
{
        size_t rlen;
        struct wpa_eapol_key *reply;
        struct wpa_ptk *ptk;
        u8 buf[8], *rbuf, *wpa_ie;
        int wpa_ie_len;

        if (sm->assoc_wpa_ie == NULL) {
                wpa_printf(MSG_WARNING, "WPA: No assoc_wpa_ie set - cannot "
                           "generate msg 2/4");
                return -1;
        }

        wpa_ie = sm->assoc_wpa_ie;
        wpa_ie_len = sm->assoc_wpa_ie_len;
        wpa_hexdump(MSG_DEBUG, "WPA: WPA IE for msg 2/4", wpa_ie, wpa_ie_len);

        rbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY,
                                  NULL, sizeof(*reply) + wpa_ie_len,
                                  &rlen, (void *) &reply);
        if (rbuf == NULL)
                return -1;

        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);

        WPA_PUT_BE16(reply->key_data_length, wpa_ie_len);
        memcpy(reply + 1, wpa_ie, wpa_ie_len);

        if (sm->renew_snonce) {
                if (hostapd_get_rand(sm->snonce, WPA_NONCE_LEN)) {
                        wpa_msg(sm->ctx->ctx, MSG_WARNING,
                                "WPA: Failed to get random data for SNonce");
                        free(rbuf);
                        return -1;
                }
                sm->renew_snonce = 0;
                wpa_hexdump(MSG_DEBUG, "WPA: Renewed SNonce",
                            sm->snonce, WPA_NONCE_LEN);
        }
        memcpy(reply->key_nonce, 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_pmk_to_ptk(sm->pmk, sm->pmk_len, sm->own_addr, src_addr,
                       sm->snonce, key->key_nonce,
                       (u8 *) ptk, sizeof(*ptk));
        /* Supplicant: swap tx/rx Mic keys */
        memcpy(buf, ptk->u.auth.tx_mic_key, 8);
        memcpy(ptk->u.auth.tx_mic_key, ptk->u.auth.rx_mic_key, 8);
        memcpy(ptk->u.auth.rx_mic_key, buf, 8);
        sm->tptk_set = 1;

        wpa_printf(MSG_DEBUG, "WPA: Sending EAPOL-Key 2/4");
        wpa_eapol_key_send(sm, ptk->kck, ver, src_addr, ETH_P_EAPOL,
                           rbuf, rlen, reply->key_mic);

        return 0;
}


static void wpa_supplicant_process_1_of_4(struct wpa_sm *sm,
                                          const unsigned char *src_addr,
                                          const struct wpa_eapol_key *key,
                                          u16 ver)
{
        struct wpa_eapol_ie_parse ie;

        if (wpa_sm_get_ssid(sm) == NULL) {
                wpa_printf(MSG_WARNING, "WPA: No SSID info found (msg 1 of "
                           "4).");
                return;
        }

        wpa_sm_set_state(sm, WPA_4WAY_HANDSHAKE);
        wpa_printf(MSG_DEBUG, "WPA: RX message 1 of 4-Way Handshake from "
                   MACSTR " (ver=%d)", MAC2STR(src_addr), ver);

        memset(&ie, 0, sizeof(ie));

        if (sm->proto == WPA_PROTO_RSN) {
                /* RSN: msg 1/4 should contain PMKID for the selected PMK */
                const u8 *buf = (const u8 *) (key + 1);
                size_t len = WPA_GET_BE16(key->key_data_length);
                wpa_hexdump(MSG_DEBUG, "RSN: msg 1/4 key data", buf, len);
                wpa_supplicant_parse_ies(buf, len, &ie);
                if (ie.pmkid) {
                        wpa_hexdump(MSG_DEBUG, "RSN: PMKID from "
                                    "Authenticator", ie.pmkid, PMKID_LEN);
                }
        }

        if (wpa_supplicant_get_pmk(sm, src_addr, ie.pmkid))
                return;

        if (wpa_supplicant_send_2_of_4(sm, src_addr, key, ver))
                return;

        memcpy(sm->anonce, key->key_nonce, WPA_NONCE_LEN);
}


static void wpa_sm_start_preauth(void *eloop_ctx, void *timeout_ctx)
{
        struct wpa_sm *sm = eloop_ctx;
        rsn_preauth_candidate_process(sm);
}


static void wpa_supplicant_key_neg_complete(struct wpa_sm *sm,
                                            const u8 *addr, int secure)
{
        wpa_msg(sm->ctx->ctx, MSG_INFO, "WPA: Key negotiation completed with "
                MACSTR " [PTK=%s GTK=%s]", MAC2STR(addr),
                wpa_cipher_txt(sm->pairwise_cipher),
                wpa_cipher_txt(sm->group_cipher));
        eloop_cancel_timeout(sm->ctx->scan, sm->ctx->ctx, NULL);
        wpa_sm_cancel_auth_timeout(sm);
        wpa_sm_set_state(sm, WPA_COMPLETED);

        if (secure) {
                /* MLME.SETPROTECTION.request(TA, Tx_Rx) */
                eapol_sm_notify_portValid(sm->eapol, TRUE);
                if (sm->key_mgmt == WPA_KEY_MGMT_PSK)
                        eapol_sm_notify_eap_success(sm->eapol, 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.
                 */
                eloop_register_timeout(1, 0, wpa_sm_start_preauth, sm, NULL);
        }

        if (sm->cur_pmksa && sm->cur_pmksa->opportunistic) {
                wpa_printf(MSG_DEBUG, "RSN: Authenticator accepted "
                           "opportunistic PMKSA entry - marking it valid");
                sm->cur_pmksa->opportunistic = 0;
        }
}


static int wpa_supplicant_install_ptk(struct wpa_sm *sm,
                                      const unsigned char *src_addr,
                                      const struct wpa_eapol_key *key)
{
        int alg, keylen, rsclen;
        const u8 *key_rsc;
        u8 null_rsc[8] = { 0, 0, 0, 0, 0, 0, 0, 0 };

        wpa_printf(MSG_DEBUG, "WPA: Installing PTK to the driver.");

        switch (sm->pairwise_cipher) {
        case WPA_CIPHER_CCMP:
                alg = WPA_ALG_CCMP;
                keylen = 16;
                rsclen = 6;
                break;
        case WPA_CIPHER_TKIP:
                alg = WPA_ALG_TKIP;
                keylen = 32;
                rsclen = 6;
                break;
        case WPA_CIPHER_NONE:
                wpa_printf(MSG_DEBUG, "WPA: Pairwise Cipher Suite: "
                           "NONE - do not use pairwise keys");
                return 0;
        default:
                wpa_printf(MSG_WARNING, "WPA: Unsupported pairwise cipher %d",
                           sm->pairwise_cipher);
                return -1;
        }

        if (sm->proto == WPA_PROTO_RSN) {
                key_rsc = null_rsc;
        } else {
                key_rsc = key->key_rsc;
                wpa_hexdump(MSG_DEBUG, "WPA: RSC", key_rsc, rsclen);
        }

        if (wpa_sm_set_key(sm, alg, src_addr, 0, 1, key_rsc, rsclen,
                           (u8 *) &sm->ptk.tk1, keylen) < 0) {
                wpa_printf(MSG_WARNING, "WPA: Failed to set PTK to the "
                           "driver.");
                return -1;
        }
        return 0;
}


static int wpa_supplicant_check_group_cipher(int group_cipher,
                                             int keylen, int maxkeylen,
                                             int *key_rsc_len, int *alg)
{
        int ret = 0;

        switch (group_cipher) {
        case WPA_CIPHER_CCMP:
                if (keylen != 16 || maxkeylen < 16) {
                        ret = -1;
                        break;
                }
                *key_rsc_len = 6;
                *alg = WPA_ALG_CCMP;
                break;
        case WPA_CIPHER_TKIP:
                if (keylen != 32 || maxkeylen < 32) {
                        ret = -1;
                        break;
                }
                *key_rsc_len = 6;
                *alg = WPA_ALG_TKIP;
                break;
        case WPA_CIPHER_WEP104:
                if (keylen != 13 || maxkeylen < 13) {
                        ret = -1;
                        break;
                }
                *key_rsc_len = 0;
                *alg = WPA_ALG_WEP;
                break;
        case WPA_CIPHER_WEP40:
                if (keylen != 5 || maxkeylen < 5) {
                        ret = -1;
                        break;
                }
                *key_rsc_len = 0;
                *alg = WPA_ALG_WEP;
                break;
        default:
                wpa_printf(MSG_WARNING, "WPA: Unsupported Group Cipher %d",
                           group_cipher);
                return -1;
        }

        if (ret < 0 ) {
                wpa_printf(MSG_WARNING, "WPA: Unsupported %s Group Cipher key "
                           "length %d (%d).",
                           wpa_cipher_txt(group_cipher), keylen, maxkeylen);
        }

        return ret;
}


struct wpa_gtk_data {
        int alg, tx, key_rsc_len, keyidx;
        u8 gtk[32];
        int gtk_len;
};


static int wpa_supplicant_install_gtk(struct wpa_sm *sm,
                                      const struct wpa_gtk_data *gd,
                                      const u8 *key_rsc)
{
        const u8 *_gtk = gd->gtk;
        u8 gtk_buf[32];

        wpa_hexdump_key(MSG_DEBUG, "WPA: Group Key", gd->gtk, gd->gtk_len);
        wpa_printf(MSG_DEBUG, "WPA: Installing GTK to the driver "
                   "(keyidx=%d tx=%d).", gd->keyidx, gd->tx);
        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 + 24, 8);
                memcpy(gtk_buf + 24, gd->gtk + 16, 8);
                _gtk = gtk_buf;
        }
        if (sm->pairwise_cipher == WPA_CIPHER_NONE) {
                if (wpa_sm_set_key(sm, gd->alg,
                                   (u8 *) "\xff\xff\xff\xff\xff\xff",
                                   gd->keyidx, 1, key_rsc, gd->key_rsc_len,
                                   _gtk, gd->gtk_len) < 0) {
                        wpa_printf(MSG_WARNING, "WPA: Failed to set "
                                   "GTK to the driver (Group only).");
                        return -1;
                }
        } else if (wpa_sm_set_key(sm, gd->alg,
                                  (u8 *) "\xff\xff\xff\xff\xff\xff",
                                  gd->keyidx, gd->tx, key_rsc, gd->key_rsc_len,
                                  _gtk, gd->gtk_len) < 0) {
                wpa_printf(MSG_WARNING, "WPA: Failed to set GTK to "
                           "the driver.");
                return -1;
        }

        return 0;
}


static 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_INFO, "WPA: Tx bit set for GTK, but pairwise "
                           "keys are used - ignore Tx bit");
                return 0;
        }
        return tx;
}


static int wpa_supplicant_pairwise_gtk(struct wpa_sm *sm,
                                       const unsigned char *src_addr,
                                       const struct wpa_eapol_key *key,
                                       const u8 *gtk, int gtk_len,
                                       int key_info)
{
        struct wpa_gtk_data 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(gd));
        wpa_hexdump_key(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->group_cipher,
                                              gtk_len, gtk_len,
                                              &gd.key_rsc_len, &gd.alg) ||
            wpa_supplicant_install_gtk(sm, &gd, key->key_rsc)) {
                wpa_printf(MSG_DEBUG, "RSN: Failed to install GTK");
                return -1;
        }

        wpa_supplicant_key_neg_complete(sm, src_addr,
                                        key_info & WPA_KEY_INFO_SECURE);
        return 0;
}


static 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)
{
        wpa_msg(sm->ctx->ctx, MSG_WARNING, "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_INFO, "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_INFO, "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, REASON_IE_IN_4WAY_DIFFERS);
        wpa_sm_req_scan(sm, 0, 0);
}


static int wpa_supplicant_validate_ie(struct wpa_sm *sm,
                                      const unsigned char *src_addr,
                                      struct wpa_eapol_ie_parse *ie)
{
        struct wpa_ssid *ssid = sm->cur_ssid;

        if (sm->ap_wpa_ie == NULL && sm->ap_rsn_ie == NULL) {
                wpa_printf(MSG_DEBUG, "WPA: No WPA/RSN IE for this AP known. "
                           "Trying to get from scan results");
                if (wpa_sm_get_beacon_ie(sm) < 0) {
                        wpa_printf(MSG_WARNING, "WPA: Could not find AP from "
                                   "the scan results");
                } else {
                        wpa_printf(MSG_DEBUG, "WPA: Found the current AP from "
                                   "updated scan results");
                }
        }

        if (ie->wpa_ie == NULL && ie->rsn_ie == NULL &&
            (sm->ap_wpa_ie || sm->ap_rsn_ie)) {
                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);
                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 &&
             (ie->rsn_ie_len != sm->ap_rsn_ie_len ||
              memcmp(ie->rsn_ie, sm->ap_rsn_ie, ie->rsn_ie_len) != 0))) {
                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);
                return -1;
        }

        if (sm->proto == WPA_PROTO_WPA &&
            ie->rsn_ie && sm->ap_rsn_ie == NULL &&
            ssid && (ssid->proto & WPA_PROTO_RSN)) {
                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);
                return -1;
        }

        return 0;
}


static int wpa_supplicant_send_4_of_4(struct wpa_sm *sm,
                                      const unsigned char *src_addr,
                                      const struct wpa_eapol_key *key,
                                      u16 ver, u16 key_info)
{
        size_t rlen;
        struct wpa_eapol_key *reply;
        u8 *rbuf;

        rbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY, NULL,
                                  sizeof(*reply), &rlen, (void *) &reply);
        if (rbuf == NULL)
                return -1;

        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);

        WPA_PUT_BE16(reply->key_data_length, 0);

        wpa_printf(MSG_DEBUG, "WPA: Sending EAPOL-Key 4/4");
        wpa_eapol_key_send(sm, sm->ptk.kck, ver, src_addr, ETH_P_EAPOL,
                           rbuf, rlen, reply->key_mic);

        return 0;
}


static void wpa_supplicant_process_3_of_4(struct wpa_sm *sm,
                                          const unsigned char *src_addr,
                                          const struct wpa_eapol_key *key,
                                          int extra_len, u16 ver)
{
        u16 key_info, keylen, len;
        const u8 *pos;
        struct wpa_eapol_ie_parse ie;

        wpa_sm_set_state(sm, WPA_4WAY_HANDSHAKE);
        wpa_printf(MSG_DEBUG, "WPA: RX message 3 of 4-Way Handshake from "
                   MACSTR " (ver=%d)", MAC2STR(src_addr), ver);

        key_info = WPA_GET_BE16(key->key_info);

        pos = (const u8 *) (key + 1);
        len = WPA_GET_BE16(key->key_data_length);
        wpa_hexdump(MSG_DEBUG, "WPA: IE KeyData", pos, len);
        wpa_supplicant_parse_ies(pos, len, &ie);
        if (ie.gtk && !(key_info & WPA_KEY_INFO_ENCR_KEY_DATA)) {
                wpa_printf(MSG_WARNING, "WPA: GTK IE in unencrypted key data");
                return;
        }

        if (wpa_supplicant_validate_ie(sm, src_addr, &ie) < 0)
                return;

        if (memcmp(sm->anonce, key->key_nonce, WPA_NONCE_LEN) != 0) {
                wpa_printf(MSG_WARNING, "WPA: ANonce from message 1 of 4-Way "
                           "Handshake differs from 3 of 4-Way Handshake - drop"
                           " packet (src=" MACSTR ")", MAC2STR(src_addr));
                return;
        }

        keylen = WPA_GET_BE16(key->key_length);
        switch (sm->pairwise_cipher) {
        case WPA_CIPHER_CCMP:
                if (keylen != 16) {
                        wpa_printf(MSG_WARNING, "WPA: Invalid CCMP key length "
                                   "%d (src=" MACSTR ")",
                                   keylen, MAC2STR(src_addr));
                        return;
                }
                break;
        case WPA_CIPHER_TKIP:
                if (keylen != 32) {
                        wpa_printf(MSG_WARNING, "WPA: Invalid TKIP key length "
                                   "%d (src=" MACSTR ")",
                                   keylen, MAC2STR(src_addr));
                        return;
                }
                break;
        }

        if (wpa_supplicant_send_4_of_4(sm, src_addr, key, ver, key_info))
                return;

        /* 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;

        if (key_info & WPA_KEY_INFO_INSTALL) {
                wpa_supplicant_install_ptk(sm, src_addr, key);
        }

        if (key_info & WPA_KEY_INFO_SECURE) {
                /* MLME.SETPROTECTION.request(TA, Tx_Rx) */
                eapol_sm_notify_portValid(sm->eapol, TRUE);
        }
        wpa_sm_set_state(sm, WPA_GROUP_HANDSHAKE);

        if (ie.gtk &&
            wpa_supplicant_pairwise_gtk(sm, src_addr, key,
                                        ie.gtk, ie.gtk_len, key_info) < 0) {
                wpa_printf(MSG_INFO, "RSN: Failed to configure GTK");
        }
}


static int wpa_supplicant_process_1_of_2_rsn(struct wpa_sm *sm,
                                             const u8 *keydata,
                                             size_t keydatalen,
                                             int 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_WARNING, "WPA: GTK IE in unencrypted key data");
                return -1;
        }
        if (ie.gtk == NULL) {
                wpa_printf(MSG_INFO, "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->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_INFO, "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);

        return 0;
}


static int wpa_supplicant_process_1_of_2_wpa(struct wpa_sm *sm,
                                             const struct wpa_eapol_key *key,
                                             size_t keydatalen, int key_info,
                                             int extra_len, u16 ver,
                                             struct wpa_gtk_data *gd)
{
        int maxkeylen;
        u8 ek[32];

        gd->gtk_len = WPA_GET_BE16(key->key_length);
        maxkeylen = keydatalen;
        if (keydatalen > extra_len) {
                wpa_printf(MSG_INFO, "WPA: Truncated EAPOL-Key packet:"
                           " key_data_length=%lu > extra_len=%d",
                           (unsigned long) keydatalen, extra_len);
                return -1;
        }
        if (ver == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES)
                maxkeylen -= 8;

        if (wpa_supplicant_check_group_cipher(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) {
                memcpy(ek, key->key_iv, 16);
                memcpy(ek + 16, sm->ptk.kek, 16);
                if (keydatalen > sizeof(gd->gtk)) {
                        wpa_printf(MSG_WARNING, "WPA: RC4 key data "
                                   "too long (%lu)",
                                   (unsigned long) keydatalen);
                        return -1;
                }
                memcpy(gd->gtk, key + 1, keydatalen);
                rc4_skip(ek, 32, 256, gd->gtk, keydatalen);
        } else if (ver == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) {
                if (keydatalen % 8) {
                        wpa_printf(MSG_WARNING, "WPA: Unsupported AES-WRAP "
                                   "len %lu", (unsigned long) keydatalen);
                        return -1;
                }
                if (maxkeylen > sizeof(gd->gtk)) {
                        wpa_printf(MSG_WARNING, "WPA: AES-WRAP key data "
                                   "too long (keydatalen=%lu maxkeylen=%lu)",
                                   (unsigned long) keydatalen,
                                   (unsigned long) maxkeylen);
                        return -1;
                }
                if (aes_unwrap(sm->ptk.kek, maxkeylen / 8,
                               (const u8 *) (key + 1), gd->gtk)) {
                        wpa_printf(MSG_WARNING, "WPA: AES unwrap "
                                   "failed - could not decrypt GTK");
                        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 unsigned char *src_addr,
                                      const struct wpa_eapol_key *key,
                                      int ver, u16 key_info)
{
        size_t rlen;
        struct wpa_eapol_key *reply;
        u8 *rbuf;

        rbuf = wpa_sm_alloc_eapol(sm, IEEE802_1X_TYPE_EAPOL_KEY, NULL,
                                  sizeof(*reply), &rlen, (void *) &reply);
        if (rbuf == NULL)
                return -1;

        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);

        WPA_PUT_BE16(reply->key_data_length, 0);

        wpa_printf(MSG_DEBUG, "WPA: Sending EAPOL-Key 2/2");
        wpa_eapol_key_send(sm, sm->ptk.kck, ver, src_addr, ETH_P_EAPOL,
                           rbuf, rlen, reply->key_mic);

        return 0;
}


static void wpa_supplicant_process_1_of_2(struct wpa_sm *sm,
                                          const unsigned char *src_addr,
                                          const struct wpa_eapol_key *key,
                                          int extra_len, u16 ver)
{
        u16 key_info, keydatalen;
        int rekey;
        struct wpa_gtk_data gd;

        memset(&gd, 0, sizeof(gd));

        rekey = wpa_sm_get_state(sm) == WPA_COMPLETED;
        wpa_sm_set_state(sm, WPA_GROUP_HANDSHAKE);
        wpa_printf(MSG_DEBUG, "WPA: RX message 1 of Group Key Handshake from "
                   MACSTR " (ver=%d)", MAC2STR(src_addr), ver);

        key_info = WPA_GET_BE16(key->key_info);
        keydatalen = WPA_GET_BE16(key->key_data_length);

        if (sm->proto == WPA_PROTO_RSN) {
                if (wpa_supplicant_process_1_of_2_rsn(sm,
                                                      (const u8 *) (key + 1),
                                                      keydatalen, key_info,
                                                      &gd))
                        return;
        } else {
                if (wpa_supplicant_process_1_of_2_wpa(sm, key, keydatalen,
                                                      key_info, extra_len,
                                                      ver, &gd))
                        return;
        }

        if (wpa_supplicant_install_gtk(sm, &gd, key->key_rsc) ||
            wpa_supplicant_send_2_of_2(sm, src_addr, key, ver, key_info))
                return;

        if (rekey) {
                wpa_msg(sm->ctx->ctx, MSG_INFO, "WPA: Group rekeying "
                        "completed with " MACSTR " [GTK=%s]",
                        MAC2STR(src_addr), wpa_cipher_txt(sm->group_cipher));
                wpa_sm_set_state(sm, WPA_COMPLETED);
        } else {
                wpa_supplicant_key_neg_complete(sm, src_addr,
                                                key_info &
                                                WPA_KEY_INFO_SECURE);
        }
}


static int wpa_supplicant_verify_eapol_key_mic(struct wpa_sm *sm,
                                               struct wpa_eapol_key *key,
                                               u16 ver,
                                               const u8 *buf, size_t len)
{
        u8 mic[16];
        int ok = 0;

        memcpy(mic, key->key_mic, 16);
        if (sm->tptk_set) {
                memset(key->key_mic, 0, 16);
                wpa_eapol_key_mic(sm->tptk.kck, ver, buf, len,
                                  key->key_mic);
                if (memcmp(mic, key->key_mic, 16) != 0) {
                        wpa_printf(MSG_WARNING, "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) {
                memset(key->key_mic, 0, 16);
                wpa_eapol_key_mic(sm->ptk.kck, ver, buf, len,
                                  key->key_mic);
                if (memcmp(mic, key->key_mic, 16) != 0) {
                        wpa_printf(MSG_WARNING, "WPA: Invalid EAPOL-Key MIC "
                                   "- dropping packet");
                        return -1;
                }
                ok = 1;
        }

        if (!ok) {
                wpa_printf(MSG_WARNING, "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;
        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)
{
        u16 keydatalen = WPA_GET_BE16(key->key_data_length);

        wpa_hexdump(MSG_DEBUG, "RSN: encrypted key data",
                    (u8 *) (key + 1), keydatalen);
        if (!sm->ptk_set) {
                wpa_printf(MSG_WARNING, "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) {
                u8 ek[32];
                memcpy(ek, key->key_iv, 16);
                memcpy(ek + 16, sm->ptk.kek, 16);
                rc4_skip(ek, 32, 256, (u8 *) (key + 1), keydatalen);
        } else if (ver == WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) {
                u8 *buf;
                if (keydatalen % 8) {
                        wpa_printf(MSG_WARNING, "WPA: Unsupported "
                                   "AES-WRAP len %d", keydatalen);
                        return -1;
                }
                keydatalen -= 8; /* AES-WRAP adds 8 bytes */
                buf = malloc(keydatalen);
                if (buf == NULL) {
                        wpa_printf(MSG_WARNING, "WPA: No memory for "
                                   "AES-UNWRAP buffer");
                        return -1;
                }
                if (aes_unwrap(sm->ptk.kek, keydatalen / 8,
                               (u8 *) (key + 1), buf)) {
                        free(buf);
                        wpa_printf(MSG_WARNING, "WPA: AES unwrap failed - "
                                   "could not decrypt EAPOL-Key key data");
                        return -1;
                }
                memcpy(key + 1, buf, keydatalen);
                free(buf);
                WPA_PUT_BE16(key->key_data_length, keydatalen);
        }
        wpa_hexdump_key(MSG_DEBUG, "WPA: decrypted EAPOL-Key key data",
                        (u8 *) (key + 1), keydatalen);
        return 0;
}


void wpa_sm_aborted_cached(struct wpa_sm *sm)
{
        if (sm && sm->cur_pmksa) {
                wpa_printf(MSG_DEBUG, "RSN: Cancelling PMKSA caching attempt");
                sm->cur_pmksa = NULL;
        }
}


static void wpa_eapol_key_dump(const struct wpa_eapol_key *key)
{
#ifndef CONFIG_NO_STDOUT_DEBUG
        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, key_info & WPA_KEY_INFO_TYPE_MASK,
                   (key_info & WPA_KEY_INFO_KEY_INDEX_MASK) >>
                   WPA_KEY_INFO_KEY_INDEX_SHIFT,
                   (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),
                   WPA_GET_BE16(key->key_data_length));
        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", key->key_mic, 16);
#endif /* CONFIG_NO_STDOUT_DEBUG */
}


int wpa_sm_rx_eapol(struct wpa_sm *sm, const u8 *src_addr,
                    const u8 *buf, size_t len)
{
        size_t plen, data_len, extra_len;
        struct ieee802_1x_hdr *hdr;
        struct wpa_eapol_key *key;
        u16 key_info, ver;
        u8 *tmp;
        int ret = -1;

        if (len < sizeof(*hdr) + sizeof(*key)) {
                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 = malloc(len);
        if (tmp == NULL)
                return -1;
        memcpy(tmp, buf, len);

        hdr = (struct ieee802_1x_hdr *) tmp;
        key = (struct wpa_eapol_key *) (hdr + 1);
        plen = ntohs(hdr->length);
        data_len = plen + sizeof(*hdr);
        wpa_printf(MSG_DEBUG, "IEEE 802.1X RX: version=%d type=%d length=%lu",
                   hdr->version, hdr->type, (unsigned long) 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 < sizeof(*key)) {
                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_eapol_key_dump(key);

        eapol_sm_notify_lower_layer_success(sm->eapol);
        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 &&
            ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) {
                wpa_printf(MSG_INFO, "WPA: Unsupported EAPOL-Key descriptor "
                           "version %d.", ver);
                goto out;
        }

        if (sm->pairwise_cipher == WPA_CIPHER_CCMP &&
            ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES) {
                wpa_printf(MSG_INFO, "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_INFO, "WPA: Backwards compatibility: "
                                   "allow invalid version for non-CCMP group "
                                   "keys");
                } else
                        goto out;
        }

        if (sm->rx_replay_counter_set &&
            memcmp(key->replay_counter, sm->rx_replay_counter,
                   WPA_REPLAY_COUNTER_LEN) <= 0) {
                wpa_printf(MSG_WARNING, "WPA: EAPOL-Key Replay Counter did not"
                           " increase - dropping packet");
                goto out;
        }

        if (!(key_info & WPA_KEY_INFO_ACK)) {
                wpa_printf(MSG_INFO, "WPA: No Ack bit in key_info");
                goto out;
        }

        if (key_info & WPA_KEY_INFO_REQUEST) {
                wpa_printf(MSG_INFO, "WPA: EAPOL-Key with Request bit - "
                           "dropped");
                goto out;
        }

        if ((key_info & WPA_KEY_INFO_MIC) &&
            wpa_supplicant_verify_eapol_key_mic(sm, key, ver, tmp, data_len))
                goto out;

        extra_len = data_len - sizeof(*hdr) - sizeof(*key);

        if (WPA_GET_BE16(key->key_data_length) > extra_len) {
                wpa_msg(sm->ctx->ctx, MSG_INFO, "WPA: Invalid EAPOL-Key "
                        "frame - key_data overflow (%d > %lu)",
                        WPA_GET_BE16(key->key_data_length),
                        (unsigned long) extra_len);
                goto out;
        }

        if (sm->proto == WPA_PROTO_RSN &&
            (key_info & WPA_KEY_INFO_ENCR_KEY_DATA) &&
            wpa_supplicant_decrypt_key_data(sm, key, ver))
                goto out;

        if (key_info & WPA_KEY_INFO_KEY_TYPE) {
                if (key_info & WPA_KEY_INFO_KEY_INDEX_MASK) {
                        wpa_printf(MSG_WARNING, "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, src_addr, key,
                                                      extra_len, ver);
                } else {
                        /* 1/4 4-Way Handshake */
                        wpa_supplicant_process_1_of_4(sm, src_addr, key,
                                                      ver);
                }
        } else {
                if (key_info & WPA_KEY_INFO_MIC) {
                        /* 1/2 Group Key Handshake */
                        wpa_supplicant_process_1_of_2(sm, src_addr, key,
                                                      extra_len, ver);
                } else {
                        wpa_printf(MSG_WARNING, "WPA: EAPOL-Key (Group) "
                                   "without Mic bit - dropped");
                }
        }

        ret = 1;

out:
        free(tmp);
        return ret;
}


static int wpa_cipher_bits(int cipher)
{
        switch (cipher) {
        case WPA_CIPHER_CCMP:
                return 128;
        case WPA_CIPHER_TKIP:
                return 256;
        case WPA_CIPHER_WEP104:
                return 104;
        case WPA_CIPHER_WEP40:
                return 40;
        default:
                return 0;
        }
}


static const u8 * wpa_key_mgmt_suite(struct wpa_sm *sm)
{
        static const u8 *dummy = (u8 *) "\x00\x00\x00\x00";
        switch (sm->key_mgmt) {
        case WPA_KEY_MGMT_IEEE8021X:
                return (sm->proto == WPA_PROTO_RSN ?
                        RSN_AUTH_KEY_MGMT_UNSPEC_802_1X :
                        WPA_AUTH_KEY_MGMT_UNSPEC_802_1X);
        case WPA_KEY_MGMT_PSK:
                return (sm->proto == WPA_PROTO_RSN ?
                        RSN_AUTH_KEY_MGMT_PSK_OVER_802_1X :
                        WPA_AUTH_KEY_MGMT_PSK_OVER_802_1X);
        case WPA_KEY_MGMT_WPA_NONE:
                return WPA_AUTH_KEY_MGMT_NONE;
        default:
                return dummy;
        }
}


static const u8 * wpa_cipher_suite(struct wpa_sm *sm, int cipher)
{
        static const u8 *dummy = (u8 *) "\x00\x00\x00\x00";
        switch (cipher) {
        case WPA_CIPHER_CCMP:
                return (sm->proto == WPA_PROTO_RSN ?
                        RSN_CIPHER_SUITE_CCMP : WPA_CIPHER_SUITE_CCMP);
        case WPA_CIPHER_TKIP:
                return (sm->proto == WPA_PROTO_RSN ?
                        RSN_CIPHER_SUITE_TKIP : WPA_CIPHER_SUITE_TKIP);
        case WPA_CIPHER_WEP104:
                return (sm->proto == WPA_PROTO_RSN ?
                        RSN_CIPHER_SUITE_WEP104 : WPA_CIPHER_SUITE_WEP104);
        case WPA_CIPHER_WEP40:
                return (sm->proto == WPA_PROTO_RSN ?
                        RSN_CIPHER_SUITE_WEP40 : WPA_CIPHER_SUITE_WEP40);
        case WPA_CIPHER_NONE:
                return (sm->proto == WPA_PROTO_RSN ?
                        RSN_CIPHER_SUITE_NONE : WPA_CIPHER_SUITE_NONE);
        default:
                return dummy;
        }
}


#define RSN_SUITE "%02x-%02x-%02x-%d"
#define RSN_SUITE_ARG(s) (s)[0], (s)[1], (s)[2], (s)[3]

int wpa_sm_get_mib(struct wpa_sm *sm, char *buf, size_t buflen)
{
        int len, i;
        char pmkid_txt[PMKID_LEN * 2 + 1];
        int rsna;

        if (sm->cur_pmksa) {
                char *pos = pmkid_txt;
                for (i = 0; i < PMKID_LEN; i++) {
                        pos += sprintf(pos, "%02x", sm->cur_pmksa->pmkid[i]);
                }
        } else
                pmkid_txt[0] = '\0';

        if ((sm->key_mgmt == WPA_KEY_MGMT_PSK ||
             sm->key_mgmt == WPA_KEY_MGMT_IEEE8021X) &&
            sm->proto == WPA_PROTO_RSN)
                rsna = 1;
        else
                rsna = 0;

        len = snprintf(buf, buflen,
                       "dot11RSNAOptionImplemented=TRUE\n"
                       "dot11RSNAPreauthenticationImplemented=TRUE\n"
                       "dot11RSNAEnabled=%s\n"
                       "dot11RSNAPreauthenticationEnabled=%s\n"
                       "dot11RSNAConfigVersion=%d\n"
                       "dot11RSNAConfigPairwiseKeysSupported=5\n"
                       "dot11RSNAConfigGroupCipherSize=%d\n"
                       "dot11RSNAConfigPMKLifetime=%d\n"
                       "dot11RSNAConfigPMKReauthThreshold=%d\n"
                       "dot11RSNAConfigNumberOfPTKSAReplayCounters=1\n"
                       "dot11RSNAConfigSATimeout=%d\n"
                       "dot11RSNAAuthenticationSuiteSelected=" RSN_SUITE "\n"
                       "dot11RSNAPairwiseCipherSelected=" RSN_SUITE "\n"
                       "dot11RSNAGroupCipherSelected=" RSN_SUITE "\n"
                       "dot11RSNAPMKIDUsed=%s\n"
                       "dot11RSNAAuthenticationSuiteRequested=" RSN_SUITE "\n"
                       "dot11RSNAPairwiseCipherRequested=" RSN_SUITE "\n"
                       "dot11RSNAGroupCipherRequested=" RSN_SUITE "\n"
                       "dot11RSNAConfigNumberOfGTKSAReplayCounters=0\n"
                       "dot11RSNA4WayHandshakeFailures=%u\n",
                       rsna ? "TRUE" : "FALSE",
                       rsna ? "TRUE" : "FALSE",
                       RSN_VERSION,
                       wpa_cipher_bits(sm->group_cipher),
                       sm->dot11RSNAConfigPMKLifetime,
                       sm->dot11RSNAConfigPMKReauthThreshold,
                       sm->dot11RSNAConfigSATimeout,
                       RSN_SUITE_ARG(wpa_key_mgmt_suite(sm)),
                       RSN_SUITE_ARG(wpa_cipher_suite(sm,
                                                      sm->pairwise_cipher)),
                       RSN_SUITE_ARG(wpa_cipher_suite(sm, sm->group_cipher)),
                       pmkid_txt,
                       RSN_SUITE_ARG(wpa_key_mgmt_suite(sm)),
                       RSN_SUITE_ARG(wpa_cipher_suite(sm,
                                                      sm->pairwise_cipher)),
                       RSN_SUITE_ARG(wpa_cipher_suite(sm, sm->group_cipher)),
                       sm->dot11RSNA4WayHandshakeFailures);
        return len;
}


struct wpa_sm * wpa_sm_init(struct wpa_sm_ctx *ctx)
{
        struct wpa_sm *sm;

        sm = malloc(sizeof(*sm));
        if (sm == NULL)
                return NULL;
        memset(sm, 0, sizeof(*sm));
        sm->renew_snonce = 1;
        sm->ctx = ctx;

        sm->dot11RSNAConfigPMKLifetime = 43200;
        sm->dot11RSNAConfigPMKReauthThreshold = 70;
        sm->dot11RSNAConfigSATimeout = 60;

        return sm;
}


void wpa_sm_deinit(struct wpa_sm *sm)
{
        if (sm == NULL)
                return;
        eloop_cancel_timeout(wpa_sm_start_preauth, sm, 0);
        free(sm->assoc_wpa_ie);
        free(sm->ap_wpa_ie);
        free(sm->ap_rsn_ie);
        free(sm->ctx);
        free(sm);
}


void wpa_sm_notify_assoc(struct wpa_sm *sm, const u8 *bssid)
{
        if (sm == NULL)
                return;

        wpa_printf(MSG_DEBUG, "WPA: Association event - clear replay counter");
        memcpy(sm->bssid, bssid, ETH_ALEN);
        memset(sm->rx_replay_counter, 0, WPA_REPLAY_COUNTER_LEN);
        sm->rx_replay_counter_set = 0;
        sm->renew_snonce = 1;
        if (memcmp(sm->preauth_bssid, bssid, ETH_ALEN) == 0)
                rsn_preauth_deinit(sm);
}


void wpa_sm_notify_disassoc(struct wpa_sm *sm)
{
        rsn_preauth_deinit(sm);
        if (wpa_sm_get_state(sm) == WPA_4WAY_HANDSHAKE)
                sm->dot11RSNA4WayHandshakeFailures++;
}


void wpa_sm_set_pmk(struct wpa_sm *sm, const u8 *pmk, size_t pmk_len)
{
        if (sm == NULL)
                return;

        sm->pmk_len = pmk_len;
        memcpy(sm->pmk, pmk, pmk_len);
}


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;
                memcpy(sm->pmk, sm->cur_pmksa->pmk, sm->pmk_len);
        } else {
                sm->pmk_len = PMK_LEN;
                memset(sm->pmk, 0, PMK_LEN);
        }
}


void wpa_sm_set_fast_reauth(struct wpa_sm *sm, int fast_reauth)
{
        if (sm)
                sm->fast_reauth = fast_reauth;
}


void wpa_sm_set_scard_ctx(struct wpa_sm *sm, void *scard_ctx)
{
        if (sm == NULL)
                return;
        sm->scard_ctx = scard_ctx;
        if (sm->preauth_eapol)
                eapol_sm_register_scard_ctx(sm->preauth_eapol, scard_ctx);
}


void wpa_sm_set_config(struct wpa_sm *sm, struct wpa_ssid *config)
{
        if (sm)
                sm->cur_ssid = config;
}


void wpa_sm_set_own_addr(struct wpa_sm *sm, const u8 *addr)
{
        if (sm)
                memcpy(sm->own_addr, addr, ETH_ALEN);
}


void wpa_sm_set_ifname(struct wpa_sm *sm, const char *ifname)
{
        if (sm)
                sm->ifname = ifname;
}


void wpa_sm_set_eapol(struct wpa_sm *sm, struct eapol_sm *eapol)
{
        if (sm)
                sm->eapol = eapol;
}


int wpa_sm_set_param(struct wpa_sm *sm, enum wpa_sm_conf_params param,
                     unsigned int value)
{
        int ret = 0;

        if (sm == NULL)
                return -1;

        switch (param) {
        case RSNA_PMK_LIFETIME:
                if (value > 0)
                        sm->dot11RSNAConfigPMKLifetime = value;
                else
                        ret = -1;
                break;
        case RSNA_PMK_REAUTH_THRESHOLD:
                if (value > 0 && value <= 100)
                        sm->dot11RSNAConfigPMKReauthThreshold = value;
                else
                        ret = -1;
                break;
        case RSNA_SA_TIMEOUT:
                if (value > 0)
                        sm->dot11RSNAConfigSATimeout = value;
                else
                        ret = -1;
                break;
        case WPA_PARAM_PROTO:
                sm->proto = value;
                break;
        case WPA_PARAM_PAIRWISE:
                sm->pairwise_cipher = value;
                break;
        case WPA_PARAM_GROUP:
                sm->group_cipher = value;
                break;
        case WPA_PARAM_KEY_MGMT:
                sm->key_mgmt = value;
                break;
        }

        return ret;
}


unsigned int wpa_sm_get_param(struct wpa_sm *sm, enum wpa_sm_conf_params param)
{
        if (sm == NULL)
                return 0;

        switch (param) {
        case RSNA_PMK_LIFETIME:
                return sm->dot11RSNAConfigPMKLifetime;
        case RSNA_PMK_REAUTH_THRESHOLD:
                return sm->dot11RSNAConfigPMKReauthThreshold;
        case RSNA_SA_TIMEOUT:
                return sm->dot11RSNAConfigSATimeout;
        case WPA_PARAM_PROTO:
                return sm->proto;
        case WPA_PARAM_PAIRWISE:
                return sm->pairwise_cipher;
        case WPA_PARAM_GROUP:
                return sm->group_cipher;
        case WPA_PARAM_KEY_MGMT:
                return sm->key_mgmt;
        default:
                return 0;
        }
}


int wpa_sm_get_status(struct wpa_sm *sm, char *buf, size_t buflen,
                      int verbose)
{
        char *pos = buf, *end = buf + buflen;

        pos += snprintf(pos, end - pos,
                        "pairwise_cipher=%s\n"
                        "group_cipher=%s\n"
                        "key_mgmt=%s\n",
                        wpa_cipher_txt(sm->pairwise_cipher),
                        wpa_cipher_txt(sm->group_cipher),
                        wpa_key_mgmt_txt(sm->key_mgmt, sm->proto));
        return pos - buf;
}


int wpa_sm_set_assoc_wpa_ie_default(struct wpa_sm *sm, u8 *wpa_ie,
                                    size_t *wpa_ie_len)
{
        int res;

        if (sm == NULL)
                return -1;

        res = wpa_gen_wpa_ie(sm, wpa_ie, *wpa_ie_len);
        if (res < 0)
                return -1;
        *wpa_ie_len = res;

        wpa_hexdump(MSG_DEBUG, "WPA: Set own WPA IE default",
                    wpa_ie, *wpa_ie_len);

        if (sm->assoc_wpa_ie == NULL) {
                /*
                 * Make a copy of the WPA/RSN IE so that 4-Way Handshake gets
                 * the correct version of the IE even if PMKSA caching is
                 * aborted (which would remove PMKID from IE generation).
                 */
                sm->assoc_wpa_ie = malloc(*wpa_ie_len);
                if (sm->assoc_wpa_ie == NULL)
                        return -1;

                memcpy(sm->assoc_wpa_ie, wpa_ie, *wpa_ie_len);
                sm->assoc_wpa_ie_len = *wpa_ie_len;
        }

        return 0;
}


int wpa_sm_set_assoc_wpa_ie(struct wpa_sm *sm, const u8 *ie, size_t len)
{
        if (sm == NULL)
                return -1;

        free(sm->assoc_wpa_ie);
        if (ie == NULL || len == 0) {
                wpa_printf(MSG_DEBUG, "WPA: clearing own WPA/RSN IE");
                sm->assoc_wpa_ie = NULL;
                sm->assoc_wpa_ie_len = 0;
        } else {
                wpa_hexdump(MSG_DEBUG, "WPA: set own WPA/RSN IE", ie, len);
                sm->assoc_wpa_ie = malloc(len);
                if (sm->assoc_wpa_ie == NULL)
                        return -1;

                memcpy(sm->assoc_wpa_ie, ie, len);
                sm->assoc_wpa_ie_len = len;
        }

        return 0;
}


int wpa_sm_set_ap_wpa_ie(struct wpa_sm *sm, const u8 *ie, size_t len)
{
        if (sm == NULL)
                return -1;

        free(sm->ap_wpa_ie);
        if (ie == NULL || len == 0) {
                wpa_printf(MSG_DEBUG, "WPA: clearing AP WPA IE");
                sm->ap_wpa_ie = NULL;
                sm->ap_wpa_ie_len = 0;
        } else {
                wpa_hexdump(MSG_DEBUG, "WPA: set AP WPA IE", ie, len);
                sm->ap_wpa_ie = malloc(len);
                if (sm->ap_wpa_ie == NULL)
                        return -1;

                memcpy(sm->ap_wpa_ie, ie, len);
                sm->ap_wpa_ie_len = len;
        }

        return 0;
}


int wpa_sm_set_ap_rsn_ie(struct wpa_sm *sm, const u8 *ie, size_t len)
{
        if (sm == NULL)
                return -1;

        free(sm->ap_rsn_ie);
        if (ie == NULL || len == 0) {
                wpa_printf(MSG_DEBUG, "WPA: clearing AP RSN IE");
                sm->ap_rsn_ie = NULL;
                sm->ap_rsn_ie_len = 0;
        } else {
                wpa_hexdump(MSG_DEBUG, "WPA: set AP RSN IE", ie, len);
                sm->ap_rsn_ie = malloc(len);
                if (sm->ap_rsn_ie == NULL)
                        return -1;

                memcpy(sm->ap_rsn_ie, ie, len);
                sm->ap_rsn_ie_len = len;
        }

        return 0;
}


int wpa_sm_parse_own_wpa_ie(struct wpa_sm *sm, struct wpa_ie_data *data)
{
        if (sm == NULL || sm->assoc_wpa_ie == NULL) {
                wpa_printf(MSG_DEBUG, "WPA: No WPA/RSN IE available from "
                           "association info");
                return -1;
        }
        if (wpa_parse_wpa_ie(sm->assoc_wpa_ie, sm->assoc_wpa_ie_len, data))
                return -2;
        return 0;
}

---