tests: New style fuzzing tool for AP Management frame processing

This is a newer version of tests/ap-mgmt-fuzzer tool.

Signed-off-by: Jouni Malinen <j@w1.fi>
This commit is contained in:
Jouni Malinen 2019-06-01 15:46:18 +03:00
parent a3275fc023
commit e30c7d5269
5 changed files with 201 additions and 0 deletions

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all: ap-mgmt
include ../rules.include
CFLAGS += -DCONFIG_WNM
CFLAGS += -DCONFIG_INTERWORKING
CFLAGS += -DCONFIG_GAS
CFLAGS += -DCONFIG_HS20
CFLAGS += -DIEEE8021X_EAPOL
CFLAGS += -DNEED_AP_MLME
CFLAGS += -DCONFIG_AIRTIME_POLICY
LIBS += $(SRC)/common/libcommon.a
LIBS += $(SRC)/crypto/libcrypto.a
LIBS += $(SRC)/tls/libtls.a
LIBS += $(SRC)/wps/libwps.a
LIBS += $(SRC)/eap_server/libeap_server.a
LIBS += $(SRC)/eap_common/libeap_common.a
LIBS += $(SRC)/l2_packet/libl2_packet.a
LIBS += $(SRC)/ap/libap.a
LIBS += $(SRC)/eapol_auth/libeapol_auth.a
LIBS += $(SRC)/radius/libradius.a
LIBS += $(SRC)/utils/libutils.a
ELIBS += $(SRC)/crypto/libcrypto.a
ELIBS += $(SRC)/tls/libtls.a
ap-mgmt: ap-mgmt.o $(OBJS) $(LIBS)
$(LDO) $(LDFLAGS) -o $@ $^ $(LIBS) $(ELIBS)
clean:
$(MAKE) -C $(SRC) clean
rm -f ap-mgmt-fuzzer *~ *.o *.d ../*~ ../*.o ../*.d
-include $(OBJS:%.o=%.d)

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/*
* hostapd - Management frame 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 "ap/hostapd.h"
#include "ap/hw_features.h"
#include "ap/ieee802_11.h"
#include "ap/sta_info.h"
#include "ap/ap_list.h"
#include "../fuzzer-common.h"
const struct wpa_driver_ops *const wpa_drivers[] =
{
NULL
};
struct arg_ctx {
const u8 *data;
size_t data_len;
struct hostapd_iface iface;
struct hostapd_data hapd;
struct wpa_driver_ops driver;
struct hostapd_config iconf;
struct hostapd_bss_config conf;
};
static void test_send_mgmt(void *eloop_data, void *user_ctx)
{
struct arg_ctx *ctx = eloop_data;
struct hostapd_frame_info fi;
const u8 *pos, *end;
os_memset(&fi, 0, sizeof(fi));
pos = ctx->data;
end = pos + ctx->data_len;
while (end - pos > 2) {
u16 flen;
flen = WPA_GET_BE16(pos);
pos += 2;
if (end - pos < flen)
break;
wpa_hexdump(MSG_MSGDUMP, "fuzzer - frame", pos, flen);
ieee802_11_mgmt(&ctx->hapd, pos, flen, &fi);
pos += flen;
}
eloop_terminate();
}
static struct hostapd_hw_modes * gen_modes(void)
{
struct hostapd_hw_modes *mode;
struct hostapd_channel_data *chan;
mode = os_zalloc(sizeof(struct hostapd_hw_modes));
if (!mode)
return NULL;
mode->mode = HOSTAPD_MODE_IEEE80211G;
chan = os_zalloc(sizeof(struct hostapd_channel_data));
if (!chan) {
os_free(mode);
return NULL;
}
chan->chan = 1;
chan->freq = 2412;
mode->channels = chan;
mode->num_channels = 1;
mode->rates = os_zalloc(sizeof(int));
if (!mode->rates) {
os_free(chan);
os_free(mode);
return NULL;
}
mode->rates[0] = 10;
mode->num_rates = 1;
return mode;
}
static int init_hapd(struct arg_ctx *ctx)
{
struct hostapd_data *hapd = &ctx->hapd;
struct sta_info *sta;
struct hostapd_bss_config *bss;
hapd->driver = &ctx->driver;
os_memcpy(hapd->own_addr, "\x02\x00\x00\x00\x03\x00", ETH_ALEN);
hapd->iface = &ctx->iface;
hapd->iface->conf = hostapd_config_defaults();
if (!hapd->iface->conf)
return -1;
hapd->iface->hw_features = gen_modes();
hapd->iface->num_hw_features = 1;
hapd->iface->current_mode = hapd->iface->hw_features;
hapd->iconf = hapd->iface->conf;
hapd->iconf->hw_mode = HOSTAPD_MODE_IEEE80211G;
hapd->iconf->channel = 1;
bss = hapd->conf = hapd->iconf->bss[0];
hostapd_config_defaults_bss(hapd->conf);
os_memcpy(bss->ssid.ssid, "test", 4);
bss->ssid.ssid_len = 4;
bss->ssid.ssid_set = 1;
sta = ap_sta_add(hapd, (u8 *) "\x02\x00\x00\x00\x00\x00");
if (sta)
sta->flags |= WLAN_STA_ASSOC | WLAN_STA_WMM;
return 0;
}
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_hapd(&ctx))
goto fail;
eloop_register_timeout(0, 0, test_send_mgmt, &ctx, NULL);
wpa_printf(MSG_DEBUG, "Starting eloop");
eloop_run();
wpa_printf(MSG_DEBUG, "eloop done");
hostapd_free_stas(&ctx.hapd);
hostapd_free_hw_features(ctx.hapd.iface->hw_features,
ctx.hapd.iface->num_hw_features);
fail:
hostapd_config_free(ctx.hapd.iconf);
ap_list_deinit(&ctx.iface);
eloop_destroy();
os_program_deinit();
return 0;
}

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