+++ /dev/null
-/*
- * 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);
-}
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