test_wpa.c

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/*
 * Test program for combined WPA authenticator/supplicant
 * Copyright (c) 2006-2007, 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 "eloop.h"
#include "common/ieee802_11_defs.h"
#include "../config.h"
#include "rsn_supp/wpa.h"
#include "rsn_supp/wpa_ie.h"
#include "../hostapd/wpa.h"


extern int wpa_debug_level;
extern int wpa_debug_show_keys;


struct wpa {
        u8 auth_addr[ETH_ALEN];
        u8 supp_addr[ETH_ALEN];
        u8 psk[PMK_LEN];

        /* from authenticator */
        u8 auth_eapol_dst[ETH_ALEN];
        u8 *auth_eapol;
        size_t auth_eapol_len;

        /* from supplicant */
        u8 *supp_eapol;
        size_t supp_eapol_len;

        struct wpa_sm *supp;
        struct wpa_authenticator *auth_group;
        struct wpa_state_machine *auth;

        struct wpa_ssid ssid;
        u8 supp_ie[80];
        size_t supp_ie_len;
};


static int supp_get_bssid(void *ctx, u8 *bssid)
{
        struct wpa *wpa = ctx;
        wpa_printf(MSG_DEBUG, "SUPP: %s", __func__);
        os_memcpy(bssid, wpa->auth_addr, ETH_ALEN);
        return 0;
}


static void supp_set_state(void *ctx, enum wpa_states state)
{
        wpa_printf(MSG_DEBUG, "SUPP: %s(state=%d)", __func__, state);
}


static void auth_eapol_rx(void *eloop_data, void *user_ctx)
{
        struct wpa *wpa = eloop_data;

        wpa_printf(MSG_DEBUG, "AUTH: RX EAPOL frame");
        wpa_receive(wpa->auth_group, wpa->auth, wpa->supp_eapol,
                    wpa->supp_eapol_len);
}


static int supp_ether_send(void *ctx, const u8 *dest, u16 proto, const u8 *buf,
                           size_t len)
{
        struct wpa *wpa = ctx;

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

        os_free(wpa->supp_eapol);
        wpa->supp_eapol = os_malloc(len);
        if (wpa->supp_eapol == NULL)
                return -1;
        os_memcpy(wpa->supp_eapol, buf, len);
        wpa->supp_eapol_len = len;
        eloop_register_timeout(0, 0, auth_eapol_rx, wpa, NULL);

        return 0;
}


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 wpa *wpa = ctx;
        const u8 *ie;
        size_t ielen;

        wpa_printf(MSG_DEBUG, "SUPP: %s", __func__);

        ie = wpa_auth_get_wpa_ie(wpa->auth_group, &ielen);
        if (ie == NULL || ielen < 1)
                return -1;
        if (ie[0] == WLAN_EID_RSN)
                return wpa_sm_set_ap_rsn_ie(wpa->supp, ie, 2 + ie[1]);
        return wpa_sm_set_ap_wpa_ie(wpa->supp, ie, 2 + ie[1]);
}


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)
{
        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(MSG_DEBUG, "SUPP: set_key - key", key, key_len);
        return 0;
}


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__);
}


static int supp_init(struct wpa *wpa)
{
        struct wpa_sm_ctx *ctx = os_zalloc(sizeof(*ctx));
        if (ctx == NULL)
                return -1;

        ctx->ctx = wpa;
        ctx->msg_ctx = wpa;
        ctx->set_state = supp_set_state;
        ctx->get_bssid = supp_get_bssid;
        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->mlme_setprotection = supp_mlme_setprotection;
        ctx->cancel_auth_timeout = supp_cancel_auth_timeout;
        wpa->supp = wpa_sm_init(ctx);
        if (wpa->supp == NULL) {
                wpa_printf(MSG_DEBUG, "SUPP: wpa_sm_init() failed");
                return -1;
        }

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

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

        wpa_sm_notify_assoc(wpa->supp, wpa->auth_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 void supp_eapol_rx(void *eloop_data, void *user_ctx)
{
        struct wpa *wpa = eloop_data;

        wpa_printf(MSG_DEBUG, "SUPP: RX EAPOL frame");
        wpa_sm_rx_eapol(wpa->supp, wpa->auth_addr, wpa->auth_eapol,
                        wpa->auth_eapol_len);
}


static int auth_send_eapol(void *ctx, const u8 *addr, const u8 *data,
                           size_t data_len, int encrypt)
{
        struct wpa *wpa = ctx;

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

        os_free(wpa->auth_eapol);
        wpa->auth_eapol = os_malloc(data_len);
        if (wpa->auth_eapol == NULL)
                return -1;
        os_memcpy(wpa->auth_eapol_dst, addr, ETH_ALEN);
        os_memcpy(wpa->auth_eapol, data, data_len);
        wpa->auth_eapol_len = data_len;
        eloop_register_timeout(0, 0, supp_eapol_rx, wpa, NULL);

        return 0;
}


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


static int auth_init_group(struct wpa *wpa)
{
        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 = wpa;
        cb.logger = auth_logger;
        cb.send_eapol = auth_send_eapol;
        cb.get_psk = auth_get_psk;

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

        return 0;
}


static int auth_init(struct wpa *wpa)
{
        wpa->auth = wpa_auth_sta_init(wpa->auth_group, wpa->supp_addr);
        if (wpa->auth == NULL) {
                wpa_printf(MSG_DEBUG, "AUTH: wpa_auth_sta_init() failed");
                return -1;
        }

        if (wpa_validate_wpa_ie(wpa->auth_group, wpa->auth, wpa->supp_ie,
                                wpa->supp_ie_len, NULL, 0) != WPA_IE_OK) {
                wpa_printf(MSG_DEBUG, "AUTH: wpa_validate_wpa_ie() failed");
                return -1;
        }

        wpa_auth_sm_event(wpa->auth, WPA_ASSOC);

        wpa_auth_sta_associated(wpa->auth_group, wpa->auth);

        return 0;
}


static void deinit(struct wpa *wpa)
{
        wpa_auth_sta_deinit(wpa->auth);
        wpa_sm_deinit(wpa->supp);
        wpa_deinit(wpa->auth_group);
        os_free(wpa->auth_eapol);
        wpa->auth_eapol = NULL;
        os_free(wpa->supp_eapol);
        wpa->supp_eapol = NULL;
}


int main(int argc, char *argv[])
{
        struct wpa wpa;

        if (os_program_init())
                return -1;

        os_memset(&wpa, 0, sizeof(wpa));
        os_memset(wpa.auth_addr, 0x12, ETH_ALEN);
        os_memset(wpa.supp_addr, 0x32, ETH_ALEN);
        os_memset(wpa.psk, 0x44, PMK_LEN);

        wpa_debug_level = 0;
        wpa_debug_show_keys = 1;

        if (eloop_init()) {
                wpa_printf(MSG_ERROR, "Failed to initialize event loop");
                return -1;
        }

        if (auth_init_group(&wpa) < 0)
                return -1;

        if (supp_init(&wpa) < 0)
                return -1;

        if (auth_init(&wpa) < 0)
                return -1;

        wpa_printf(MSG_DEBUG, "Starting eloop");
        eloop_run();
        wpa_printf(MSG_DEBUG, "eloop done");

        deinit(&wpa);

        eloop_destroy();

        os_program_deinit();

        return 0;
}