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

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/*
* wpa_supplicant - EAPOL fuzzer
* Copyright (c) 2015-2019, 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 "eapol_supp/eapol_supp_sm.h"
#include "rsn_supp/wpa.h"
#include "rsn_supp/wpa_i.h"
#include "../fuzzer-common.h"
struct arg_ctx {
const u8 *data;
size_t data_len;
struct wpa_sm *wpa;
struct eapol_sm *eapol;
};
static void test_send_eapol(void *eloop_data, void *user_ctx)
{
struct arg_ctx *ctx = eloop_data;
u8 src[ETH_ALEN] = { 0x02, 0x00, 0x00, 0x00, 0x00, 0x01 };
u8 wpa_ie[200];
size_t wpa_ie_len;
wpa_hexdump(MSG_MSGDUMP, "fuzzer - EAPOL", ctx->data, ctx->data_len);
eapol_sm_notify_portEnabled(ctx->eapol, TRUE);
wpa_sm_set_param(ctx->wpa, WPA_PARAM_PROTO, WPA_PROTO_RSN);
wpa_sm_set_param(ctx->wpa, WPA_PARAM_RSN_ENABLED, 1);
wpa_sm_set_param(ctx->wpa, WPA_PARAM_KEY_MGMT, WPA_KEY_MGMT_PSK);
wpa_sm_set_param(ctx->wpa, WPA_PARAM_PAIRWISE, WPA_CIPHER_CCMP);
wpa_sm_set_param(ctx->wpa, WPA_PARAM_GROUP, WPA_CIPHER_CCMP);
wpa_ie_len = sizeof(wpa_ie);
wpa_sm_set_assoc_wpa_ie_default(ctx->wpa, wpa_ie, &wpa_ie_len);
if (eapol_sm_rx_eapol(ctx->eapol, src, ctx->data, ctx->data_len) <= 0)
wpa_sm_rx_eapol(ctx->wpa, src, ctx->data, ctx->data_len);
eloop_terminate();
}
static void * get_network_ctx(void *arg)
{
return (void *) 1;
}
static void set_state(void *arg, enum wpa_states state)
{
}
static void deauthenticate(void *arg, u16 reason_code)
{
}
static u8 * alloc_eapol(void *arg, u8 type,
const void *data, u16 data_len,
size_t *msg_len, void **data_pos)
{
struct ieee802_1x_hdr *hdr;
*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 ether_send(void *arg, const u8 *dest, u16 proto,
const u8 *buf, size_t len)
{
return 0;
}
static int get_bssid(void *ctx, u8 *bssid)
{
return -1;
}
static int eapol_send(void *ctx, int type, const u8 *buf, size_t len)
{
return 0;
}
static int init_wpa(struct arg_ctx *arg)
{
struct wpa_sm_ctx *ctx;
ctx = os_zalloc(sizeof(*ctx));
if (ctx == NULL) {
wpa_printf(MSG_ERROR, "Failed to allocate WPA context.");
return -1;
}
ctx->ctx = arg;
ctx->msg_ctx = arg;
ctx->get_network_ctx = get_network_ctx;
ctx->set_state = set_state;
ctx->deauthenticate = deauthenticate;
ctx->alloc_eapol = alloc_eapol;
ctx->ether_send = ether_send;
ctx->get_bssid = get_bssid;
arg->wpa = wpa_sm_init(ctx);
if (!arg->wpa)
return -1;
arg->wpa->pmk_len = PMK_LEN;
return 0;
}
static int init_eapol(struct arg_ctx *arg)
{
struct eapol_ctx *ctx;
ctx = os_zalloc(sizeof(*ctx));
if (ctx == NULL) {
wpa_printf(MSG_ERROR, "Failed to allocate EAPOL context.");
return -1;
}
ctx->ctx = arg;
ctx->msg_ctx = arg;
ctx->eapol_send = eapol_send;
arg->eapol = eapol_sm_init(ctx);
return arg->eapol ? 0 : -1;
}
int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
{
struct arg_ctx ctx;
wpa_fuzzer_set_debug_level();
if (os_program_init())
return 0;
if (eloop_init()) {
wpa_printf(MSG_ERROR, "Failed to initialize event loop");
return 0;
}
os_memset(&ctx, 0, sizeof(ctx));
ctx.data = data;
ctx.data_len = size;
if (init_wpa(&ctx) || init_eapol(&ctx))
goto fail;
eloop_register_timeout(0, 0, test_send_eapol, &ctx, NULL);
wpa_printf(MSG_DEBUG, "Starting eloop");
eloop_run();
wpa_printf(MSG_DEBUG, "eloop done");
fail:
if (ctx.wpa)
wpa_sm_deinit(ctx.wpa);
if (ctx.eapol)
eapol_sm_deinit(ctx.eapol);
eloop_destroy();
os_program_deinit();
return 0;
}