tests: New style fuzzing tool for EAP-MSCHAPv2 peer processing

Signed-off-by: Jouni Malinen <j@w1.fi>
This commit is contained in:
Jouni Malinen 2019-12-24 10:59:22 +02:00
parent 07fe134d9c
commit ce1598d4c2
3 changed files with 172 additions and 0 deletions

View file

@ -0,0 +1,20 @@
all: eap-mschapv2-peer
include ../rules.include
CFLAGS += -DIEEE8021X_EAPOL
OBJS += $(SRC)/eap_peer/eap_mschapv2.o
OBJS += $(SRC)/eap_peer/mschapv2.o
OBJS += $(SRC)/eap_common/eap_common.o
LIBS += $(SRC)/crypto/libcrypto.a
LIBS += $(SRC)/utils/libutils.a
eap-mschapv2-peer: eap-mschapv2-peer.o $(OBJS) $(LIBS)
$(Q)$(LDO) $(LDFLAGS) -o $@ $^ $(LIBS) $(ELIBS)
@$(E) " LD " $@
clean:
$(MAKE) -C $(SRC) clean
rm -f eap-mschapv2-peer *~ *.o *.d ../*~ ../*.o ../*.d
-include $(OBJS:%.o=%.d)

Binary file not shown.

View file

@ -0,0 +1,152 @@
/*
* EAP-SIM peer fuzzer
* Copyright (c) 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 "eap_peer/eap_methods.h"
#include "eap_peer/eap_config.h"
#include "eap_peer/eap_i.h"
#include "../fuzzer-common.h"
int eap_peer_sim_register(void);
struct eap_method * registered_eap_method = NULL;
struct eap_method * eap_peer_method_alloc(int version, int vendor,
enum eap_type method,
const char *name)
{
struct eap_method *eap;
eap = os_zalloc(sizeof(*eap));
if (!eap)
return NULL;
eap->version = version;
eap->vendor = vendor;
eap->method = method;
eap->name = name;
return eap;
}
int eap_peer_method_register(struct eap_method *method)
{
registered_eap_method = method;
return 0;
}
static struct eap_peer_config eap_mschapv2_config = {
.identity = (u8 *) "user",
.identity_len = 4,
.password = (u8 *) "password",
.password_len = 8,
};
struct eap_peer_config * eap_get_config(struct eap_sm *sm)
{
return &eap_mschapv2_config;
}
const u8 * eap_get_config_identity(struct eap_sm *sm, size_t *len)
{
static const char *id = "user";
*len = os_strlen(id);
return (const u8 *) id;
}
const u8 * eap_get_config_password(struct eap_sm *sm, size_t *len)
{
struct eap_peer_config *config = eap_get_config(sm);
*len = config->password_len;
return config->password;
}
const u8 * eap_get_config_password2(struct eap_sm *sm, size_t *len, int *hash)
{
struct eap_peer_config *config = eap_get_config(sm);
*len = config->password_len;
if (hash)
*hash = !!(config->flags & EAP_CONFIG_FLAGS_PASSWORD_NTHASH);
return config->password;
}
const u8 * eap_get_config_new_password(struct eap_sm *sm, size_t *len)
{
*len = 3;
return (const u8 *) "new";
}
void eap_sm_request_identity(struct eap_sm *sm)
{
}
void eap_sm_request_password(struct eap_sm *sm)
{
}
void eap_sm_request_new_password(struct eap_sm *sm)
{
}
int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
{
const u8 *pos, *end;
struct eap_sm *sm;
void *priv;
struct eap_method_ret ret;
wpa_fuzzer_set_debug_level();
eap_peer_mschapv2_register();
sm = os_zalloc(sizeof(*sm));
if (!sm)
return 0;
priv = registered_eap_method->init(sm);
os_memset(&ret, 0, sizeof(ret));
pos = data;
end = pos + size;
while (end - pos > 2) {
u16 flen;
struct wpabuf *buf, *req;
flen = WPA_GET_BE16(pos);
pos += 2;
if (end - pos < flen)
break;
req = wpabuf_alloc_copy(pos, flen);
if (!req)
break;
wpa_hexdump_buf(MSG_MSGDUMP, "fuzzer - request", req);
buf = registered_eap_method->process(sm, priv, &ret, req);
wpa_hexdump_buf(MSG_MSGDUMP, "fuzzer - local response", buf);
wpabuf_free(req);
wpabuf_free(buf);
pos += flen;
}
registered_eap_method->deinit(sm, priv);
os_free(registered_eap_method);
os_free(sm);
return 0;
}