hostap/tests/fuzzing/eapol-key-supp/eapol-key-supp.c

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/*
* 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);
}
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, 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 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;
}