[thirdparty/hostap.git] / wpa_supplicant / ibss_rsn.c

/*
 * wpa_supplicant - IBSS RSN
 * Copyright (c) 2009, Jouni Malinen <j@w1.fi>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * Alternatively, this software may be distributed under the terms of BSD
 * license.
 *
 * See README and COPYING for more details.
 */

#include "includes.h"

#include "common.h"
#include "l2_packet/l2_packet.h"
#include "rsn_supp/wpa.h"
#include "rsn_supp/wpa_ie.h"
#include "ap/wpa_auth.h"
#include "wpa_supplicant_i.h"
#include "driver_i.h"
#include "ibss_rsn.h"


static void ibss_rsn_free(struct ibss_rsn_peer *peer)
{
	wpa_auth_sta_deinit(peer->auth);
	wpa_sm_deinit(peer->supp);
	os_free(peer);
}


static void supp_set_state(void *ctx, enum wpa_states state)
{
	struct ibss_rsn_peer *peer = ctx;
	peer->supp_state = state;
}


static int supp_ether_send(void *ctx, const u8 *dest, u16 proto, const u8 *buf,
			   size_t len)
{
	struct ibss_rsn_peer *peer = ctx;
	struct wpa_supplicant *wpa_s = peer->ibss_rsn->wpa_s;

	wpa_printf(MSG_DEBUG, "SUPP: %s(dest=" MACSTR " proto=0x%04x "
		   "len=%lu)",
		   __func__, MAC2STR(dest), proto, (unsigned long) len);

	if (wpa_s->l2)
		return l2_packet_send(wpa_s->l2, dest, proto, buf, len);

	return wpa_drv_send_eapol(wpa_s, dest, proto, buf, len);
}


static u8 * supp_alloc_eapol(void *ctx, u8 type, const void *data,
			     u16 data_len, size_t *msg_len, void **data_pos)
{
	struct ieee802_1x_hdr *hdr;

	wpa_printf(MSG_DEBUG, "SUPP: %s(type=%d data_len=%d)",
		   __func__, type, data_len);

	*msg_len = sizeof(*hdr) + data_len;
	hdr = os_malloc(*msg_len);
	if (hdr == NULL)
		return NULL;

	hdr->version = 2;
	hdr->type = type;
	hdr->length = host_to_be16(data_len);

	if (data)
		os_memcpy(hdr + 1, data, data_len);
	else
		os_memset(hdr + 1, 0, data_len);

	if (data_pos)
		*data_pos = hdr + 1;

	return (u8 *) hdr;
}


static int supp_get_beacon_ie(void *ctx)
{
	struct ibss_rsn_peer *peer = ctx;

	wpa_printf(MSG_DEBUG, "SUPP: %s", __func__);
	/* TODO: get correct RSN IE */
	return wpa_sm_set_ap_rsn_ie(peer->supp,
				    (u8 *) "\x30\x14\x01\x00"
				    "\x00\x0f\xac\x04"
				    "\x01\x00\x00\x0f\xac\x04"
				    "\x01\x00\x00\x0f\xac\x02"
				    "\x00\x00", 22);
}


static int supp_set_key(void *ctx, enum wpa_alg alg,
			const u8 *addr, int key_idx, int set_tx,
			const u8 *seq, size_t seq_len,
			const u8 *key, size_t key_len)
{
	struct ibss_rsn_peer *peer = ctx;

	wpa_printf(MSG_DEBUG, "SUPP: %s(alg=%d addr=" MACSTR " key_idx=%d "
		   "set_tx=%d)",
		   __func__, alg, MAC2STR(addr), key_idx, set_tx);
	wpa_hexdump(MSG_DEBUG, "SUPP: set_key - seq", seq, seq_len);
	wpa_hexdump_key(MSG_DEBUG, "SUPP: set_key - key", key, key_len);

	if (key_idx == 0) {
		/*
		 * In IBSS RSN, the pairwise key from the 4-way handshake
		 * initiated by the peer with highest MAC address is used.
		 */
		if (os_memcmp(peer->ibss_rsn->wpa_s->own_addr, peer->addr,
			      ETH_ALEN) > 0) {
			wpa_printf(MSG_DEBUG, "SUPP: Do not use this PTK");
			return 0;
		}
	}

	return wpa_drv_set_key(peer->ibss_rsn->wpa_s, alg, addr, key_idx,
			       set_tx, seq, seq_len, key, key_len);
}


static void * supp_get_network_ctx(void *ctx)
{
	struct ibss_rsn_peer *peer = ctx;
	return wpa_supplicant_get_ssid(peer->ibss_rsn->wpa_s);
}


static int supp_mlme_setprotection(void *ctx, const u8 *addr,
				   int protection_type, int key_type)
{
	wpa_printf(MSG_DEBUG, "SUPP: %s(addr=" MACSTR " protection_type=%d "
		   "key_type=%d)",
		   __func__, MAC2STR(addr), protection_type, key_type);
	return 0;
}


static void supp_cancel_auth_timeout(void *ctx)
{
	wpa_printf(MSG_DEBUG, "SUPP: %s", __func__);
}


int ibss_rsn_supp_init(struct ibss_rsn_peer *peer, const u8 *own_addr,
		       const u8 *psk)
{
	struct wpa_sm_ctx *ctx = os_zalloc(sizeof(*ctx));
	if (ctx == NULL)
		return -1;

	ctx->ctx = peer;
	ctx->msg_ctx = peer->ibss_rsn->wpa_s;
	ctx->set_state = supp_set_state;
	ctx->ether_send = supp_ether_send;
	ctx->get_beacon_ie = supp_get_beacon_ie;
	ctx->alloc_eapol = supp_alloc_eapol;
	ctx->set_key = supp_set_key;
	ctx->get_network_ctx = supp_get_network_ctx;
	ctx->mlme_setprotection = supp_mlme_setprotection;
	ctx->cancel_auth_timeout = supp_cancel_auth_timeout;
	peer->supp = wpa_sm_init(ctx);
	if (peer->supp == NULL) {
		wpa_printf(MSG_DEBUG, "SUPP: wpa_sm_init() failed");
		return -1;
	}

	wpa_sm_set_own_addr(peer->supp, own_addr);
	wpa_sm_set_param(peer->supp, WPA_PARAM_RSN_ENABLED, 1);
	wpa_sm_set_param(peer->supp, WPA_PARAM_PROTO, WPA_PROTO_RSN);
	wpa_sm_set_param(peer->supp, WPA_PARAM_PAIRWISE, WPA_CIPHER_CCMP);
	wpa_sm_set_param(peer->supp, WPA_PARAM_GROUP, WPA_CIPHER_CCMP);
	wpa_sm_set_param(peer->supp, WPA_PARAM_KEY_MGMT, WPA_KEY_MGMT_PSK);
	wpa_sm_set_pmk(peer->supp, psk, PMK_LEN);

	peer->supp_ie_len = sizeof(peer->supp_ie);
	if (wpa_sm_set_assoc_wpa_ie_default(peer->supp, peer->supp_ie,
					    &peer->supp_ie_len) < 0) {
		wpa_printf(MSG_DEBUG, "SUPP: wpa_sm_set_assoc_wpa_ie_default()"
			   " failed");
		return -1;
	}

	wpa_sm_notify_assoc(peer->supp, peer->addr);

	return 0;
}


static void auth_logger(void *ctx, const u8 *addr, logger_level level,
			const char *txt)
{
	if (addr)
		wpa_printf(MSG_DEBUG, "AUTH: " MACSTR " - %s",
			   MAC2STR(addr), txt);
	else
		wpa_printf(MSG_DEBUG, "AUTH: %s", txt);
}


static const u8 * auth_get_psk(void *ctx, const u8 *addr, const u8 *prev_psk)
{
	struct ibss_rsn *ibss_rsn = ctx;
	wpa_printf(MSG_DEBUG, "AUTH: %s (addr=" MACSTR " prev_psk=%p)",
		   __func__, MAC2STR(addr), prev_psk);
	if (prev_psk)
		return NULL;
	return ibss_rsn->psk;
}


static int auth_send_eapol(void *ctx, const u8 *addr, const u8 *data,
			   size_t data_len, int encrypt)
{
	struct ibss_rsn *ibss_rsn = ctx;
	struct wpa_supplicant *wpa_s = ibss_rsn->wpa_s;

	wpa_printf(MSG_DEBUG, "AUTH: %s(addr=" MACSTR " data_len=%lu "
		   "encrypt=%d)",
		   __func__, MAC2STR(addr), (unsigned long) data_len, encrypt);

	if (wpa_s->l2)
		return l2_packet_send(wpa_s->l2, addr, ETH_P_EAPOL, data,
				      data_len);

	return wpa_drv_send_eapol(wpa_s, addr, ETH_P_EAPOL, data, data_len);
}


static int auth_set_key(void *ctx, int vlan_id, enum wpa_alg alg,
			const u8 *addr, int idx, u8 *key, size_t key_len)
{
	struct ibss_rsn *ibss_rsn = ctx;
	u8 seq[6];

	os_memset(seq, 0, sizeof(seq));

	if (addr) {
		wpa_printf(MSG_DEBUG, "AUTH: %s(alg=%d addr=" MACSTR
			   " key_idx=%d)",
			   __func__, alg, MAC2STR(addr), idx);
	} else {
		wpa_printf(MSG_DEBUG, "AUTH: %s(alg=%d key_idx=%d)",
			   __func__, alg, idx);
	}
	wpa_hexdump_key(MSG_DEBUG, "AUTH: set_key - key", key, key_len);

	if (idx == 0) {
		/*
		 * In IBSS RSN, the pairwise key from the 4-way handshake
		 * initiated by the peer with highest MAC address is used.
		 */
		if (addr == NULL ||
		    os_memcmp(ibss_rsn->wpa_s->own_addr, addr, ETH_ALEN) < 0) {
			wpa_printf(MSG_DEBUG, "AUTH: Do not use this PTK");
			return 0;
		}
	}

	return wpa_drv_set_key(ibss_rsn->wpa_s, alg, addr, idx,
			       1, seq, 6, key, key_len);
}


static int ibss_rsn_auth_init_group(struct ibss_rsn *ibss_rsn,
				    const u8 *own_addr)
{
	struct wpa_auth_config conf;
	struct wpa_auth_callbacks cb;

	wpa_printf(MSG_DEBUG, "AUTH: Initializing group state machine");

	os_memset(&conf, 0, sizeof(conf));
	conf.wpa = 2;
	conf.wpa_key_mgmt = WPA_KEY_MGMT_PSK;
	conf.wpa_pairwise = WPA_CIPHER_CCMP;
	conf.rsn_pairwise = WPA_CIPHER_CCMP;
	conf.wpa_group = WPA_CIPHER_CCMP;
	conf.eapol_version = 2;

	os_memset(&cb, 0, sizeof(cb));
	cb.ctx = ibss_rsn;
	cb.logger = auth_logger;
	cb.send_eapol = auth_send_eapol;
	cb.get_psk = auth_get_psk;
	cb.set_key = auth_set_key;

	ibss_rsn->auth_group = wpa_init(own_addr, &conf, &cb);
	if (ibss_rsn->auth_group == NULL) {
		wpa_printf(MSG_DEBUG, "AUTH: wpa_init() failed");
		return -1;
	}

	return 0;
}


static int ibss_rsn_auth_init(struct ibss_rsn *ibss_rsn,
			      struct ibss_rsn_peer *peer)
{
	peer->auth = wpa_auth_sta_init(ibss_rsn->auth_group, peer->addr);
	if (peer->auth == NULL) {
		wpa_printf(MSG_DEBUG, "AUTH: wpa_auth_sta_init() failed");
		return -1;
	}

	/* TODO: get peer RSN IE with Probe Request */
	if (wpa_validate_wpa_ie(ibss_rsn->auth_group, peer->auth,
				(u8 *) "\x30\x14\x01\x00"
				"\x00\x0f\xac\x04"
				"\x01\x00\x00\x0f\xac\x04"
				"\x01\x00\x00\x0f\xac\x02"
				"\x00\x00", 22, NULL, 0) !=
	    WPA_IE_OK) {
		wpa_printf(MSG_DEBUG, "AUTH: wpa_validate_wpa_ie() failed");
		return -1;
	}

	if (wpa_auth_sm_event(peer->auth, WPA_ASSOC))
		return -1;

	if (wpa_auth_sta_associated(ibss_rsn->auth_group, peer->auth))
		return -1;

	return 0;
}


int ibss_rsn_start(struct ibss_rsn *ibss_rsn, const u8 *addr)
{
	struct ibss_rsn_peer *peer;

	wpa_printf(MSG_DEBUG, "RSN: Starting IBSS Authenticator and "
		   "Supplicant for peer " MACSTR, MAC2STR(addr));

	peer = os_zalloc(sizeof(*peer));
	if (peer == NULL)
		return -1;

	peer->ibss_rsn = ibss_rsn;
	os_memcpy(peer->addr, addr, ETH_ALEN);

	if (ibss_rsn_supp_init(peer, ibss_rsn->wpa_s->own_addr, ibss_rsn->psk)
	    < 0) {
		ibss_rsn_free(peer);
		return -1;
	}

	if (ibss_rsn_auth_init(ibss_rsn, peer) < 0) {
		ibss_rsn_free(peer);
		return -1;
	}

	peer->next = ibss_rsn->peers;
	ibss_rsn->peers = peer;

	return 0;
}


struct ibss_rsn * ibss_rsn_init(struct wpa_supplicant *wpa_s)
{
	struct ibss_rsn *ibss_rsn;

	ibss_rsn = os_zalloc(sizeof(*ibss_rsn));
	if (ibss_rsn == NULL)
		return NULL;
	ibss_rsn->wpa_s = wpa_s;

	if (ibss_rsn_auth_init_group(ibss_rsn, wpa_s->own_addr) < 0) {
		ibss_rsn_deinit(ibss_rsn);
		return NULL;
	}

	return ibss_rsn;
}


void ibss_rsn_deinit(struct ibss_rsn *ibss_rsn)
{
	struct ibss_rsn_peer *peer, *prev;

	if (ibss_rsn == NULL)
		return;

	peer = ibss_rsn->peers;
	while (peer) {
		prev = peer;
		peer = peer->next;
		ibss_rsn_free(prev);
	}

	wpa_deinit(ibss_rsn->auth_group);
	os_free(ibss_rsn);

}


static int ibss_rsn_eapol_dst_supp(const u8 *buf, size_t len)
{
	const struct ieee802_1x_hdr *hdr;
	const struct wpa_eapol_key *key;
	u16 key_info;
	size_t plen;

	/* TODO: Support other EAPOL packets than just EAPOL-Key */

	if (len < sizeof(*hdr) + sizeof(*key))
		return -1;

	hdr = (const struct ieee802_1x_hdr *) buf;
	key = (const struct wpa_eapol_key *) (hdr + 1);
	plen = be_to_host16(hdr->length);

	if (hdr->version < EAPOL_VERSION) {
		/* TODO: backwards compatibility */
	}
	if (hdr->type != IEEE802_1X_TYPE_EAPOL_KEY) {
		wpa_printf(MSG_DEBUG, "RSN: EAPOL frame (type %u) discarded, "
			"not a Key frame", hdr->type);
		return -1;
	}
	if (plen > len - sizeof(*hdr) || plen < sizeof(*key)) {
		wpa_printf(MSG_DEBUG, "RSN: EAPOL frame payload size %lu "
			   "invalid (frame size %lu)",
			   (unsigned long) plen, (unsigned long) len);
		return -1;
	}

	if (key->type != EAPOL_KEY_TYPE_RSN) {
		wpa_printf(MSG_DEBUG, "RSN: EAPOL-Key type (%d) unknown, "
			   "discarded", key->type);
		return -1;
	}

	key_info = WPA_GET_BE16(key->key_info);

	return !!(key_info & WPA_KEY_INFO_ACK);
}


static int ibss_rsn_process_rx_eapol(struct ibss_rsn *ibss_rsn,
				     struct ibss_rsn_peer *peer,
				     const u8 *buf, size_t len)
{
	int supp;
	u8 *tmp;

	supp = ibss_rsn_eapol_dst_supp(buf, len);
	if (supp < 0)
		return -1;

	tmp = os_malloc(len);
	if (tmp == NULL)
		return -1;
	os_memcpy(tmp, buf, len);
	if (supp) {
		wpa_printf(MSG_DEBUG, "RSN: IBSS RX EAPOL for Supplicant");
		wpa_sm_rx_eapol(peer->supp, peer->addr, tmp, len);
	} else {
		wpa_printf(MSG_DEBUG, "RSN: IBSS RX EAPOL for Authenticator");
		wpa_receive(ibss_rsn->auth_group, peer->auth, tmp, len);
	}
	os_free(tmp);

	return 1;
}


int ibss_rsn_rx_eapol(struct ibss_rsn *ibss_rsn, const u8 *src_addr,
		      const u8 *buf, size_t len)
{
	struct ibss_rsn_peer *peer;

	for (peer = ibss_rsn->peers; peer; peer = peer->next) {
		if (os_memcmp(src_addr, peer->addr, ETH_ALEN) == 0)
			return ibss_rsn_process_rx_eapol(ibss_rsn, peer,
							 buf, len);
	}

	if (ibss_rsn_eapol_dst_supp(buf, len) > 0) {
		/*
		 * Create new IBSS peer based on an EAPOL message from the peer
		 * Authenticator.
		 */
		if (ibss_rsn_start(ibss_rsn, src_addr) < 0)
			return -1;
		return ibss_rsn_process_rx_eapol(ibss_rsn, ibss_rsn->peers,
						 buf, len);
	}

	return 0;
}


void ibss_rsn_set_psk(struct ibss_rsn *ibss_rsn, const u8 *psk)
{
	os_memcpy(ibss_rsn->psk, psk, PMK_LEN);
}
Commit	Line	Data
11ef8d35 JM	1	/*
	2	* wpa_supplicant - IBSS RSN
	3	* Copyright (c) 2009, Jouni Malinen <j@w1.fi>
	4	*
	5	* This program is free software; you can redistribute it and/or modify
	6	* it under the terms of the GNU General Public License version 2 as
	7	* published by the Free Software Foundation.
	8	*
	9	* Alternatively, this software may be distributed under the terms of BSD
	10	* license.
	11	*
	12	* See README and COPYING for more details.
	13	*/
	14
	15	#include "includes.h"
	16
	17	#include "common.h"
e2d492dd	18	#include "l2_packet/l2_packet.h"
3acb5005 JM	19	#include "rsn_supp/wpa.h"
3acb5005 JM	20	#include "rsn_supp/wpa_ie.h"
71934751	21	#include "ap/wpa_auth.h"
1057d78e	22	#include "wpa_supplicant_i.h"
ea038e0d	23	#include "driver_i.h"
11ef8d35 JM	24	#include "ibss_rsn.h"
	25
	26
	27	static void ibss_rsn_free(struct ibss_rsn_peer *peer)
	28	{
	29	wpa_auth_sta_deinit(peer->auth);
	30	wpa_sm_deinit(peer->supp);
	31	os_free(peer);
	32	}
	33
	34
71934751	35	static void supp_set_state(void *ctx, enum wpa_states state)
3146b2b9 JM	36	{
	37	struct ibss_rsn_peer *peer = ctx;
	38	peer->supp_state = state;
	39	}
	40
	41
11ef8d35 JM	42	static int supp_ether_send(void ctx, const u8 dest, u16 proto, const u8 *buf,
	43	size_t len)
	44	{
e2d492dd JM	45	struct ibss_rsn_peer *peer = ctx;
e2d492dd JM	46	struct wpa_supplicant *wpa_s = peer->ibss_rsn->wpa_s;
11ef8d35 JM	47
	48	wpa_printf(MSG_DEBUG, "SUPP: %s(dest=" MACSTR " proto=0x%04x "
	49	"len=%lu)",
	50	__func__, MAC2STR(dest), proto, (unsigned long) len);
	51
e2d492dd JM	52	if (wpa_s->l2)
e2d492dd JM	53	return l2_packet_send(wpa_s->l2, dest, proto, buf, len);
11ef8d35	54
e2d492dd	55	return wpa_drv_send_eapol(wpa_s, dest, proto, buf, len);
11ef8d35 JM	56	}
	57
	58
	59	static u8 * supp_alloc_eapol(void ctx, u8 type, const void data,
	60	u16 data_len, size_t msg_len, void *data_pos)
	61	{
	62	struct ieee802_1x_hdr *hdr;
	63
	64	wpa_printf(MSG_DEBUG, "SUPP: %s(type=%d data_len=%d)",
	65	__func__, type, data_len);
	66
	67	msg_len = sizeof(hdr) + data_len;
	68	hdr = os_malloc(*msg_len);
	69	if (hdr == NULL)
	70	return NULL;
	71
	72	hdr->version = 2;
	73	hdr->type = type;
	74	hdr->length = host_to_be16(data_len);
	75
	76	if (data)
	77	os_memcpy(hdr + 1, data, data_len);
	78	else
	79	os_memset(hdr + 1, 0, data_len);
	80
	81	if (data_pos)
	82	*data_pos = hdr + 1;
	83
	84	return (u8 *) hdr;
	85	}
	86
	87
	88	static int supp_get_beacon_ie(void *ctx)
	89	{
4691fc7b JM	90	struct ibss_rsn_peer *peer = ctx;
4691fc7b JM	91
11ef8d35	92	wpa_printf(MSG_DEBUG, "SUPP: %s", __func__);
4691fc7b JM	93	/* TODO: get correct RSN IE */
	94	return wpa_sm_set_ap_rsn_ie(peer->supp,
	95	(u8 *) "\x30\x14\x01\x00"
	96	"\x00\x0f\xac\x04"
	97	"\x01\x00\x00\x0f\xac\x04"
	98	"\x01\x00\x00\x0f\xac\x02"
	99	"\x00\x00", 22);
11ef8d35 JM	100	}
	101
	102
71934751	103	static int supp_set_key(void *ctx, enum wpa_alg alg,
11ef8d35 JM	104	const u8 *addr, int key_idx, int set_tx,
	105	const u8 *seq, size_t seq_len,
	106	const u8 *key, size_t key_len)
	107	{
98f14041 JM	108	struct ibss_rsn_peer *peer = ctx;
98f14041 JM	109
a486c0c7 JM	110	wpa_printf(MSG_DEBUG, "SUPP: %s(alg=%d addr=" MACSTR " key_idx=%d "
	111	"set_tx=%d)",
	112	__func__, alg, MAC2STR(addr), key_idx, set_tx);
	113	wpa_hexdump(MSG_DEBUG, "SUPP: set_key - seq", seq, seq_len);
	114	wpa_hexdump_key(MSG_DEBUG, "SUPP: set_key - key", key, key_len);
	115
98f14041 JM	116	if (key_idx == 0) {
	117	/*
	118	* In IBSS RSN, the pairwise key from the 4-way handshake
	119	* initiated by the peer with highest MAC address is used.
	120	*/
	121	if (os_memcmp(peer->ibss_rsn->wpa_s->own_addr, peer->addr,
a486c0c7 JM	122	ETH_ALEN) > 0) {
a486c0c7 JM	123	wpa_printf(MSG_DEBUG, "SUPP: Do not use this PTK");
98f14041	124	return 0;
a486c0c7	125	}
98f14041 JM	126	}
98f14041 JM	127
98f14041 JM	128	return wpa_drv_set_key(peer->ibss_rsn->wpa_s, alg, addr, key_idx,
98f14041 JM	129	set_tx, seq, seq_len, key, key_len);
11ef8d35 JM	130	}
	131
	132
3146b2b9 JM	133	static void * supp_get_network_ctx(void *ctx)
	134	{
	135	struct ibss_rsn_peer *peer = ctx;
	136	return wpa_supplicant_get_ssid(peer->ibss_rsn->wpa_s);
	137	}
	138
	139
11ef8d35 JM	140	static int supp_mlme_setprotection(void ctx, const u8 addr,
	141	int protection_type, int key_type)
	142	{
	143	wpa_printf(MSG_DEBUG, "SUPP: %s(addr=" MACSTR " protection_type=%d "
	144	"key_type=%d)",
	145	__func__, MAC2STR(addr), protection_type, key_type);
	146	return 0;
	147	}
	148
	149
	150	static void supp_cancel_auth_timeout(void *ctx)
	151	{
	152	wpa_printf(MSG_DEBUG, "SUPP: %s", __func__);
	153	}
	154
	155
	156	int ibss_rsn_supp_init(struct ibss_rsn_peer peer, const u8 own_addr,
	157	const u8 *psk)
	158	{
	159	struct wpa_sm_ctx ctx = os_zalloc(sizeof(ctx));
	160	if (ctx == NULL)
	161	return -1;
	162
	163	ctx->ctx = peer;
0f057fb2	164	ctx->msg_ctx = peer->ibss_rsn->wpa_s;
3146b2b9	165	ctx->set_state = supp_set_state;
11ef8d35 JM	166	ctx->ether_send = supp_ether_send;
	167	ctx->get_beacon_ie = supp_get_beacon_ie;
	168	ctx->alloc_eapol = supp_alloc_eapol;
	169	ctx->set_key = supp_set_key;
3146b2b9	170	ctx->get_network_ctx = supp_get_network_ctx;
11ef8d35 JM	171	ctx->mlme_setprotection = supp_mlme_setprotection;
	172	ctx->cancel_auth_timeout = supp_cancel_auth_timeout;
	173	peer->supp = wpa_sm_init(ctx);
	174	if (peer->supp == NULL) {
	175	wpa_printf(MSG_DEBUG, "SUPP: wpa_sm_init() failed");
	176	return -1;
	177	}
	178
	179	wpa_sm_set_own_addr(peer->supp, own_addr);
	180	wpa_sm_set_param(peer->supp, WPA_PARAM_RSN_ENABLED, 1);
	181	wpa_sm_set_param(peer->supp, WPA_PARAM_PROTO, WPA_PROTO_RSN);
	182	wpa_sm_set_param(peer->supp, WPA_PARAM_PAIRWISE, WPA_CIPHER_CCMP);
	183	wpa_sm_set_param(peer->supp, WPA_PARAM_GROUP, WPA_CIPHER_CCMP);
	184	wpa_sm_set_param(peer->supp, WPA_PARAM_KEY_MGMT, WPA_KEY_MGMT_PSK);
	185	wpa_sm_set_pmk(peer->supp, psk, PMK_LEN);
	186
11ef8d35 JM	187	peer->supp_ie_len = sizeof(peer->supp_ie);
	188	if (wpa_sm_set_assoc_wpa_ie_default(peer->supp, peer->supp_ie,
	189	&peer->supp_ie_len) < 0) {
	190	wpa_printf(MSG_DEBUG, "SUPP: wpa_sm_set_assoc_wpa_ie_default()"
	191	" failed");
	192	return -1;
	193	}
11ef8d35 JM	194
	195	wpa_sm_notify_assoc(peer->supp, peer->addr);
	196
	197	return 0;
	198	}
	199
	200
	201	static void auth_logger(void ctx, const u8 addr, logger_level level,
	202	const char *txt)
	203	{
	204	if (addr)
	205	wpa_printf(MSG_DEBUG, "AUTH: " MACSTR " - %s",
	206	MAC2STR(addr), txt);
	207	else
	208	wpa_printf(MSG_DEBUG, "AUTH: %s", txt);
	209	}
	210
	211
	212	static const u8 * auth_get_psk(void ctx, const u8 addr, const u8 *prev_psk)
	213	{
	214	struct ibss_rsn *ibss_rsn = ctx;
	215	wpa_printf(MSG_DEBUG, "AUTH: %s (addr=" MACSTR " prev_psk=%p)",
	216	__func__, MAC2STR(addr), prev_psk);
	217	if (prev_psk)
	218	return NULL;
	219	return ibss_rsn->psk;
	220	}
	221
	222
	223	static int auth_send_eapol(void ctx, const u8 addr, const u8 *data,
	224	size_t data_len, int encrypt)
	225	{
da3c6a5e JM	226	struct ibss_rsn *ibss_rsn = ctx;
da3c6a5e JM	227	struct wpa_supplicant *wpa_s = ibss_rsn->wpa_s;
11ef8d35 JM	228
	229	wpa_printf(MSG_DEBUG, "AUTH: %s(addr=" MACSTR " data_len=%lu "
	230	"encrypt=%d)",
	231	__func__, MAC2STR(addr), (unsigned long) data_len, encrypt);
	232
e2d492dd JM	233	if (wpa_s->l2)
	234	return l2_packet_send(wpa_s->l2, addr, ETH_P_EAPOL, data,
	235	data_len);
11ef8d35	236
e2d492dd	237	return wpa_drv_send_eapol(wpa_s, addr, ETH_P_EAPOL, data, data_len);
11ef8d35 JM	238	}
	239
	240
71934751 JM	241	static int auth_set_key(void *ctx, int vlan_id, enum wpa_alg alg,
71934751 JM	242	const u8 addr, int idx, u8 key, size_t key_len)
98f14041 JM	243	{
	244	struct ibss_rsn *ibss_rsn = ctx;
	245	u8 seq[6];
98f14041 JM	246
98f14041 JM	247	os_memset(seq, 0, sizeof(seq));
a486c0c7 JM	248
	249	if (addr) {
	250	wpa_printf(MSG_DEBUG, "AUTH: %s(alg=%d addr=" MACSTR
	251	" key_idx=%d)",
	252	__func__, alg, MAC2STR(addr), idx);
	253	} else {
	254	wpa_printf(MSG_DEBUG, "AUTH: %s(alg=%d key_idx=%d)",
	255	__func__, alg, idx);
	256	}
	257	wpa_hexdump_key(MSG_DEBUG, "AUTH: set_key - key", key, key_len);
	258
98f14041 JM	259	if (idx == 0) {
	260	/*
	261	* In IBSS RSN, the pairwise key from the 4-way handshake
	262	* initiated by the peer with highest MAC address is used.
	263	*/
a416fb47 JM	264	if (addr == NULL \|\|
a416fb47 JM	265	os_memcmp(ibss_rsn->wpa_s->own_addr, addr, ETH_ALEN) < 0) {
a486c0c7	266	wpa_printf(MSG_DEBUG, "AUTH: Do not use this PTK");
98f14041	267	return 0;
a486c0c7	268	}
98f14041 JM	269	}
	270
	271	return wpa_drv_set_key(ibss_rsn->wpa_s, alg, addr, idx,
	272	1, seq, 6, key, key_len);
	273	}
	274
	275
11ef8d35 JM	276	static int ibss_rsn_auth_init_group(struct ibss_rsn *ibss_rsn,
	277	const u8 *own_addr)
	278	{
	279	struct wpa_auth_config conf;
	280	struct wpa_auth_callbacks cb;
	281
	282	wpa_printf(MSG_DEBUG, "AUTH: Initializing group state machine");
	283
	284	os_memset(&conf, 0, sizeof(conf));
	285	conf.wpa = 2;
	286	conf.wpa_key_mgmt = WPA_KEY_MGMT_PSK;
	287	conf.wpa_pairwise = WPA_CIPHER_CCMP;
	288	conf.rsn_pairwise = WPA_CIPHER_CCMP;
	289	conf.wpa_group = WPA_CIPHER_CCMP;
	290	conf.eapol_version = 2;
	291
	292	os_memset(&cb, 0, sizeof(cb));
	293	cb.ctx = ibss_rsn;
	294	cb.logger = auth_logger;
	295	cb.send_eapol = auth_send_eapol;
	296	cb.get_psk = auth_get_psk;
98f14041	297	cb.set_key = auth_set_key;
11ef8d35 JM	298
	299	ibss_rsn->auth_group = wpa_init(own_addr, &conf, &cb);
	300	if (ibss_rsn->auth_group == NULL) {
	301	wpa_printf(MSG_DEBUG, "AUTH: wpa_init() failed");
	302	return -1;
	303	}
	304
	305	return 0;
	306	}
	307
	308
	309	static int ibss_rsn_auth_init(struct ibss_rsn *ibss_rsn,
	310	struct ibss_rsn_peer *peer)
	311	{
	312	peer->auth = wpa_auth_sta_init(ibss_rsn->auth_group, peer->addr);
	313	if (peer->auth == NULL) {
	314	wpa_printf(MSG_DEBUG, "AUTH: wpa_auth_sta_init() failed");
	315	return -1;
	316	}
	317
d0fc6e12 JM	318	/* TODO: get peer RSN IE with Probe Request */
d0fc6e12 JM	319	if (wpa_validate_wpa_ie(ibss_rsn->auth_group, peer->auth,
4691fc7b	320	(u8 *) "\x30\x14\x01\x00"
d0fc6e12 JM	321	"\x00\x0f\xac\x04"
d0fc6e12 JM	322	"\x01\x00\x00\x0f\xac\x04"
4691fc7b JM	323	"\x01\x00\x00\x0f\xac\x02"
4691fc7b JM	324	"\x00\x00", 22, NULL, 0) !=
d0fc6e12	325	WPA_IE_OK) {
11ef8d35 JM	326	wpa_printf(MSG_DEBUG, "AUTH: wpa_validate_wpa_ie() failed");
	327	return -1;
	328	}
11ef8d35	329
6f9b5d16 JM	330	if (wpa_auth_sm_event(peer->auth, WPA_ASSOC))
6f9b5d16 JM	331	return -1;
11ef8d35	332
6f9b5d16 JM	333	if (wpa_auth_sta_associated(ibss_rsn->auth_group, peer->auth))
6f9b5d16 JM	334	return -1;
11ef8d35 JM	335
	336	return 0;
	337	}
	338
	339
	340	int ibss_rsn_start(struct ibss_rsn ibss_rsn, const u8 addr)
	341	{
	342	struct ibss_rsn_peer *peer;
	343
	344	wpa_printf(MSG_DEBUG, "RSN: Starting IBSS Authenticator and "
	345	"Supplicant for peer " MACSTR, MAC2STR(addr));
	346
	347	peer = os_zalloc(sizeof(*peer));
	348	if (peer == NULL)
	349	return -1;
	350
e2d492dd	351	peer->ibss_rsn = ibss_rsn;
11ef8d35 JM	352	os_memcpy(peer->addr, addr, ETH_ALEN);
	353
	354	if (ibss_rsn_supp_init(peer, ibss_rsn->wpa_s->own_addr, ibss_rsn->psk)
	355	< 0) {
	356	ibss_rsn_free(peer);
	357	return -1;
	358	}
	359
	360	if (ibss_rsn_auth_init(ibss_rsn, peer) < 0) {
	361	ibss_rsn_free(peer);
	362	return -1;
	363	}
	364
	365	peer->next = ibss_rsn->peers;
	366	ibss_rsn->peers = peer;
	367
	368	return 0;
	369	}
	370
	371
	372	struct ibss_rsn * ibss_rsn_init(struct wpa_supplicant *wpa_s)
	373	{
	374	struct ibss_rsn *ibss_rsn;
	375
	376	ibss_rsn = os_zalloc(sizeof(*ibss_rsn));
	377	if (ibss_rsn == NULL)
	378	return NULL;
	379	ibss_rsn->wpa_s = wpa_s;
	380
	381	if (ibss_rsn_auth_init_group(ibss_rsn, wpa_s->own_addr) < 0) {
	382	ibss_rsn_deinit(ibss_rsn);
	383	return NULL;
	384	}
	385
	386	return ibss_rsn;
	387	}
	388
	389
	390	void ibss_rsn_deinit(struct ibss_rsn *ibss_rsn)
	391	{
	392	struct ibss_rsn_peer peer, prev;
	393
	394	if (ibss_rsn == NULL)
	395	return;
	396
	397	peer = ibss_rsn->peers;
	398	while (peer) {
	399	prev = peer;
	400	peer = peer->next;
	401	ibss_rsn_free(prev);
	402	}
	403
	404	wpa_deinit(ibss_rsn->auth_group);
	405	os_free(ibss_rsn);
	406
	407	}
8be18440 JM	408
	409
	410	static int ibss_rsn_eapol_dst_supp(const u8 *buf, size_t len)
	411	{
	412	const struct ieee802_1x_hdr *hdr;
	413	const struct wpa_eapol_key *key;
	414	u16 key_info;
	415	size_t plen;
	416
	417	/* TODO: Support other EAPOL packets than just EAPOL-Key */
	418
	419	if (len < sizeof(hdr) + sizeof(key))
	420	return -1;
	421
	422	hdr = (const struct ieee802_1x_hdr *) buf;
	423	key = (const struct wpa_eapol_key *) (hdr + 1);
	424	plen = be_to_host16(hdr->length);
	425
	426	if (hdr->version < EAPOL_VERSION) {
	427	/* TODO: backwards compatibility */
	428	}
	429	if (hdr->type != IEEE802_1X_TYPE_EAPOL_KEY) {
	430	wpa_printf(MSG_DEBUG, "RSN: EAPOL frame (type %u) discarded, "
	431	"not a Key frame", hdr->type);
	432	return -1;
	433	}
	434	if (plen > len - sizeof(hdr) \|\| plen < sizeof(key)) {
	435	wpa_printf(MSG_DEBUG, "RSN: EAPOL frame payload size %lu "
	436	"invalid (frame size %lu)",
	437	(unsigned long) plen, (unsigned long) len);
	438	return -1;
	439	}
	440
	441	if (key->type != EAPOL_KEY_TYPE_RSN) {
	442	wpa_printf(MSG_DEBUG, "RSN: EAPOL-Key type (%d) unknown, "
	443	"discarded", key->type);
	444	return -1;
	445	}
	446
	447	key_info = WPA_GET_BE16(key->key_info);
	448
	449	return !!(key_info & WPA_KEY_INFO_ACK);
	450	}
	451
	452
	453	static int ibss_rsn_process_rx_eapol(struct ibss_rsn *ibss_rsn,
	454	struct ibss_rsn_peer *peer,
	455	const u8 *buf, size_t len)
	456	{
	457	int supp;
	458	u8 *tmp;
	459
	460	supp = ibss_rsn_eapol_dst_supp(buf, len);
	461	if (supp < 0)
	462	return -1;
	463
	464	tmp = os_malloc(len);
	465	if (tmp == NULL)
	466	return -1;
	467	os_memcpy(tmp, buf, len);
	468	if (supp) {
	469	wpa_printf(MSG_DEBUG, "RSN: IBSS RX EAPOL for Supplicant");
	470	wpa_sm_rx_eapol(peer->supp, peer->addr, tmp, len);
	471	} else {
472	wpa_printf(MSG_DEBUG, "RSN: IBSS RX EAPOL for Authenticator");
473	wpa_receive(ibss_rsn->auth_group, peer->auth, tmp, len);
474	}
475	os_free(tmp);
476
477	return 1;
478	}
479
480
481	int ibss_rsn_rx_eapol(struct ibss_rsn ibss_rsn, const u8 src_addr,
482	const u8 *buf, size_t len)
483	{
484	struct ibss_rsn_peer *peer;
485
486	for (peer = ibss_rsn->peers; peer; peer = peer->next) {
487	if (os_memcmp(src_addr, peer->addr, ETH_ALEN) == 0)
488	return ibss_rsn_process_rx_eapol(ibss_rsn, peer,
489	buf, len);
490	}
491
492	if (ibss_rsn_eapol_dst_supp(buf, len) > 0) {
493	/*
494	* Create new IBSS peer based on an EAPOL message from the peer
495	* Authenticator.
496	*/
497	if (ibss_rsn_start(ibss_rsn, src_addr) < 0)
498	return -1;
499	return ibss_rsn_process_rx_eapol(ibss_rsn, ibss_rsn->peers,
500	buf, len);
501	}
502
503	return 0;
504	}
b9a2e577 JM	505
	506
	507	void ibss_rsn_set_psk(struct ibss_rsn ibss_rsn, const u8 psk)
	508	{
	509	os_memcpy(ibss_rsn->psk, psk, PMK_LEN);
	510	}