/*

 * Testing tool for EAPOL-Key Supplicant routines

 * Copyright (c) 2006-2019, Jouni Malinen <j@w1.fi>

 *

 * This software may be distributed under the terms of the BSD license.

 * See README for more details.

 */

#include "utils/includes.h"

#include "utils/common.h"

#include "utils/eloop.h"

#include "rsn_supp/wpa.h"

#include "../fuzzer-common.h"

struct wpa {

  const u8 *data;

  size_t data_len;

  size_t data_offset;

  int wpa1;

  u8 auth_addr[ETH_ALEN];

  u8 supp_addr[ETH_ALEN];

  u8 psk[PMK_LEN];

  /* from authenticator */

  u8 *auth_eapol;

  size_t auth_eapol_len;

  struct wpa_sm *supp;

  u8 supp_ie[80];

  size_t supp_ie_len;

};

const struct wpa_driver_ops *const wpa_drivers[] = { NULL };

static u8 * read_msg(struct wpa *wpa, size_t *ret_len)

{

  u16 msg_len;

  u8 *msg;

  if (wpa->data_len - wpa->data_offset < 2) {

    wpa_printf(MSG_ERROR, "TEST-ERROR: Could not read msg len");

    eloop_terminate();

    return NULL;

  }

  msg_len = WPA_GET_BE16(&wpa->data[wpa->data_offset]);

  wpa->data_offset += 2;

  msg = os_malloc(msg_len);

  if (!msg)

    return NULL;

  if (msg_len > 0 && wpa->data_len - wpa->data_offset < msg_len) {

    wpa_printf(MSG_ERROR, "TEST-ERROR: Truncated msg (msg_len=%u)",

         msg_len);

    os_free(msg);

    eloop_terminate();

    return NULL;

  }

  os_memcpy(msg, &wpa->data[wpa->data_offset], msg_len);

  wpa->data_offset += msg_len;

  wpa_hexdump(MSG_DEBUG, "TEST: Read message from file", msg, msg_len);

  *ret_len = msg_len;

  return msg;

}

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 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, FRAME_ENCRYPTION_UNKNOWN);

}

static int supp_read_msg(struct wpa *wpa)

{

  os_free(wpa->auth_eapol);

  wpa->auth_eapol = read_msg(wpa, &wpa->auth_eapol_len);

  if (!wpa->auth_eapol)

    return -1;

  eloop_register_timeout(0, 0, supp_eapol_rx, wpa, NULL);

  return 0;

}

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);

  return supp_read_msg(wpa);

}

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;

  static const u8 wpaie[] = {

    0xdd, 0x16, 0x00, 0x50, 0xf2, 0x01, 0x01, 0x00,

    0x00, 0x50, 0xf2, 0x02, 0x01, 0x00, 0x00, 0x50,

    0xf2, 0x02, 0x01, 0x00, 0x00, 0x50, 0xf2, 0x02

  };

  static const u8 rsne[] = {

    0x30, 0x14, 0x01, 0x00, 0x00, 0x0f, 0xac, 0x04,

    0x01, 0x00, 0x00, 0x0f, 0xac, 0x04, 0x01, 0x00,

    0x00, 0x0f, 0xac, 0x02, 0xc0, 0x00

  };

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

  ie = wpa->wpa1 ? wpaie : rsne;

  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, int link_id, 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, enum key_flag key_flag)

{

  wpa_printf(MSG_DEBUG, "SUPP: %s(alg=%d addr=" MACSTR " key_idx=%d "

       "set_tx=%d key_flag=0x%x link_id=%d)",

       __func__, alg, MAC2STR(addr), key_idx, set_tx, key_flag,

       link_id);

  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 void * supp_get_network_ctx(void *ctx)

{

  return (void *) 1;

}

static void supp_deauthenticate(void *ctx, u16 reason_code)

{

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

}

static enum wpa_states supp_get_state(void *ctx)

{

  return WPA_COMPLETED;

}

static int supp_init(struct wpa *wpa)

{

  struct wpa_sm_ctx *ctx = os_zalloc(sizeof(*ctx));

  if (!ctx)

    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;

  ctx->get_network_ctx = supp_get_network_ctx;

  ctx->deauthenticate = supp_deauthenticate;

  ctx->get_state = supp_get_state;

  wpa->supp = wpa_sm_init(ctx);

  if (!wpa->supp) {

    wpa_printf(MSG_DEBUG, "SUPP: wpa_sm_init() failed");

    return -1;

  }

  wpa_sm_set_own_addr(wpa->supp, wpa->supp_addr);

  if (wpa->wpa1) {

    wpa_sm_set_param(wpa->supp, WPA_PARAM_RSN_ENABLED, 0);

    wpa_sm_set_param(wpa->supp, WPA_PARAM_PROTO, WPA_PROTO_WPA);

    wpa_sm_set_param(wpa->supp, WPA_PARAM_PAIRWISE,

         WPA_CIPHER_TKIP);

    wpa_sm_set_param(wpa->supp, WPA_PARAM_GROUP, WPA_CIPHER_TKIP);

    wpa_sm_set_param(wpa->supp, WPA_PARAM_KEY_MGMT,

         WPA_KEY_MGMT_PSK);

  } else {

    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_param(wpa->supp, WPA_PARAM_MFP,

         MGMT_FRAME_PROTECTION_OPTIONAL);

  }

  wpa_sm_set_pmk(wpa->supp, wpa->psk, PMK_LEN, NULL, NULL);

  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);

  supp_read_msg(wpa);

  return 0;

}

static void deinit(struct wpa *wpa)

{

  wpa_sm_deinit(wpa->supp);

  os_free(wpa->auth_eapol);

  wpa->auth_eapol = NULL;

}

int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)

{

  struct wpa wpa;

  wpa_fuzzer_set_debug_level();

  if (os_program_init())

    return -1;

  os_memset(&wpa, 0, sizeof(wpa));

  wpa.data = data;

  wpa.data_len = size;

  os_memset(wpa.auth_addr, 0x12, ETH_ALEN);

  os_memset(wpa.supp_addr, 0x32, ETH_ALEN);

  os_memset(wpa.psk, 0x44, PMK_LEN);

  if (eloop_init()) {

    wpa_printf(MSG_ERROR, "Failed to initialize event loop");

    goto fail;

  }

  if (supp_init(&wpa) < 0)

    goto fail;

  wpa_printf(MSG_DEBUG, "Starting eloop");

  eloop_run();

  wpa_printf(MSG_DEBUG, "eloop done");

fail:

  deinit(&wpa);

  eloop_destroy();

  os_program_deinit();

  return 0;

}