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329 lines
7.3 KiB
C
329 lines
7.3 KiB
C
/*
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* Testing tool for EAPOL-Key Authenticator routines
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* Copyright (c) 2006-2019, Jouni Malinen <j@w1.fi>
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*
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* This software may be distributed under the terms of the BSD license.
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* See README for more details.
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*/
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#include "utils/includes.h"
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#include "utils/common.h"
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#include "utils/eloop.h"
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#include "ap/wpa_auth.h"
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#include "../fuzzer-common.h"
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struct wpa {
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const u8 *data;
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size_t data_len;
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size_t data_offset;
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int wpa1;
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u8 auth_addr[ETH_ALEN];
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u8 supp_addr[ETH_ALEN];
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u8 psk[PMK_LEN];
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/* from supplicant */
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u8 *supp_eapol;
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size_t supp_eapol_len;
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struct wpa_auth_callbacks auth_cb;
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struct wpa_authenticator *auth_group;
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struct wpa_state_machine *auth;
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u8 supp_ie[80];
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size_t supp_ie_len;
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int key_request_done;
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int key_request_done1;
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int auth_sent;
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};
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const struct wpa_driver_ops *const wpa_drivers[] = { NULL };
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static int auth_read_msg(struct wpa *wpa);
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static void supp_eapol_key_request(void *eloop_data, void *user_ctx);
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static u8 * read_msg(struct wpa *wpa, size_t *ret_len)
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{
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u16 msg_len;
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u8 *msg;
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if (wpa->data_len - wpa->data_offset < 2) {
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wpa_printf(MSG_ERROR, "TEST-ERROR: Could not read msg len");
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eloop_terminate();
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return NULL;
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}
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msg_len = WPA_GET_BE16(&wpa->data[wpa->data_offset]);
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wpa->data_offset += 2;
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msg = os_malloc(msg_len);
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if (!msg)
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return NULL;
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if (msg_len > 0 && wpa->data_len - wpa->data_offset < msg_len) {
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wpa_printf(MSG_ERROR, "TEST-ERROR: Truncated msg (msg_len=%u)",
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msg_len);
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os_free(msg);
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eloop_terminate();
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return NULL;
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}
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os_memcpy(msg, &wpa->data[wpa->data_offset], msg_len);
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wpa->data_offset += msg_len;
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wpa_hexdump(MSG_DEBUG, "TEST: Read message from file", msg, msg_len);
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*ret_len = msg_len;
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return msg;
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}
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static void auth_eapol_rx(void *eloop_data, void *user_ctx)
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{
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struct wpa *wpa = eloop_data;
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wpa_printf(MSG_DEBUG, "AUTH: RX EAPOL frame");
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wpa->auth_sent = 0;
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wpa_receive(wpa->auth_group, wpa->auth, wpa->supp_eapol,
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wpa->supp_eapol_len);
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if (!wpa->auth_sent) {
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/* Speed up process by not going through retransmit timeout */
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wpa_printf(MSG_DEBUG,
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"AUTH: No response was sent - process next message");
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auth_read_msg(wpa);
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}
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if (wpa->wpa1 && wpa->key_request_done && !wpa->key_request_done1) {
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wpa->key_request_done1 = 1;
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eloop_register_timeout(0, 0, supp_eapol_key_request,
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wpa, NULL);
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}
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}
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static void auth_logger(void *ctx, const u8 *addr, logger_level level,
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const char *txt)
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{
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if (addr)
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wpa_printf(MSG_DEBUG, "AUTH: " MACSTR " - %s",
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MAC2STR(addr), txt);
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else
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wpa_printf(MSG_DEBUG, "AUTH: %s", txt);
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}
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static int auth_read_msg(struct wpa *wpa)
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{
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os_free(wpa->supp_eapol);
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wpa->supp_eapol = read_msg(wpa, &wpa->supp_eapol_len);
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if (!wpa->supp_eapol)
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return -1;
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eloop_register_timeout(0, 0, auth_eapol_rx, wpa, NULL);
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return 0;
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}
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static int auth_send_eapol(void *ctx, const u8 *addr, const u8 *data,
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size_t data_len, int encrypt)
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{
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struct wpa *wpa = ctx;
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wpa_printf(MSG_DEBUG, "AUTH: %s(addr=" MACSTR " data_len=%lu "
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"encrypt=%d)",
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__func__, MAC2STR(addr), (unsigned long) data_len, encrypt);
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wpa->auth_sent = 1;
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return auth_read_msg(wpa);
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}
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static const u8 * auth_get_psk(void *ctx, const u8 *addr,
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const u8 *p2p_dev_addr, const u8 *prev_psk,
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size_t *psk_len, struct vlan_description *vlan_desc)
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{
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struct wpa *wpa = ctx;
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wpa_printf(MSG_DEBUG, "AUTH: %s (addr=" MACSTR " prev_psk=%p)",
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__func__, MAC2STR(addr), prev_psk);
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if (vlan_desc)
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vlan_desc->notempty = 0;
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if (psk_len)
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*psk_len = PMK_LEN;
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if (prev_psk)
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return NULL;
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return wpa->psk;
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}
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static void supp_eapol_key_request(void *eloop_data, void *user_ctx)
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{
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struct wpa *wpa = eloop_data;
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wpa_printf(MSG_DEBUG, "SUPP: EAPOL-Key Request trigger");
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if (!eloop_is_timeout_registered(auth_eapol_rx, wpa, NULL))
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auth_read_msg(wpa);
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}
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static int auth_set_key(void *ctx, int vlan_id, enum wpa_alg alg,
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const u8 *addr, int idx, u8 *key,
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size_t key_len, enum key_flag key_flag)
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{
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struct wpa *wpa = ctx;
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wpa_printf(MSG_DEBUG,
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"AUTH: %s (vlan_id=%d alg=%d idx=%d key_len=%d key_flag=0x%x)",
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__func__, vlan_id, alg, idx, (int) key_len, key_flag);
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if (addr)
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wpa_printf(MSG_DEBUG, "AUTH: addr=" MACSTR, MAC2STR(addr));
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if (alg != WPA_ALG_NONE && idx == 0 && key_len > 0 &&
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!wpa->key_request_done) {
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wpa_printf(MSG_DEBUG, "Test EAPOL-Key Request");
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wpa->key_request_done = 1;
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if (!wpa->wpa1)
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eloop_register_timeout(0, 0, supp_eapol_key_request,
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wpa, NULL);
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}
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return 0;
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}
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static int auth_init_group(struct wpa *wpa)
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{
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struct wpa_auth_config conf;
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wpa_printf(MSG_DEBUG, "AUTH: Initializing group state machine");
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os_memset(&conf, 0, sizeof(conf));
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if (wpa->wpa1) {
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conf.wpa = 1;
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conf.wpa_key_mgmt = WPA_KEY_MGMT_PSK;
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conf.wpa_pairwise = WPA_CIPHER_TKIP;
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conf.wpa_group = WPA_CIPHER_TKIP;
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} else {
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conf.wpa = 2;
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conf.wpa_key_mgmt = WPA_KEY_MGMT_PSK;
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conf.wpa_pairwise = WPA_CIPHER_CCMP;
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conf.rsn_pairwise = WPA_CIPHER_CCMP;
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conf.wpa_group = WPA_CIPHER_CCMP;
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conf.ieee80211w = 2;
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conf.group_mgmt_cipher = WPA_CIPHER_AES_128_CMAC;
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}
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conf.eapol_version = 2;
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conf.wpa_group_update_count = 4;
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conf.wpa_pairwise_update_count = 4;
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wpa->auth_cb.logger = auth_logger;
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wpa->auth_cb.send_eapol = auth_send_eapol;
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wpa->auth_cb.get_psk = auth_get_psk;
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wpa->auth_cb.set_key = auth_set_key;
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wpa->auth_group = wpa_init(wpa->auth_addr, &conf, &wpa->auth_cb, wpa);
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if (!wpa->auth_group) {
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wpa_printf(MSG_DEBUG, "AUTH: wpa_init() failed");
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return -1;
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}
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return 0;
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}
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static int auth_init(struct wpa *wpa)
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{
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const u8 *supp_ie;
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size_t supp_ie_len;
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static const u8 ie_rsn[] = {
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0x30, 0x14, 0x01, 0x00, 0x00, 0x0f, 0xac, 0x04,
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0x01, 0x00, 0x00, 0x0f, 0xac, 0x04, 0x01, 0x00,
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0x00, 0x0f, 0xac, 0x02, 0x80, 0x00
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};
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static const u8 ie_wpa[] = {
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0xdd, 0x16, 0x00, 0x50, 0xf2, 0x01, 0x01, 0x00,
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0x00, 0x50, 0xf2, 0x02, 0x01, 0x00, 0x00, 0x50,
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0xf2, 0x02, 0x01, 0x00, 0x00, 0x50, 0xf2, 0x02
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};
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if (wpa->wpa1) {
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supp_ie = ie_wpa;
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supp_ie_len = sizeof(ie_wpa);
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} else {
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supp_ie = ie_rsn;
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supp_ie_len = sizeof(ie_rsn);
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}
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wpa->auth = wpa_auth_sta_init(wpa->auth_group, wpa->supp_addr, NULL);
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if (!wpa->auth) {
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wpa_printf(MSG_DEBUG, "AUTH: wpa_auth_sta_init() failed");
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return -1;
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}
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if (wpa_validate_wpa_ie(wpa->auth_group, wpa->auth, 2412, supp_ie,
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supp_ie_len, NULL, 0, NULL, 0, NULL, 0) !=
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WPA_IE_OK) {
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wpa_printf(MSG_DEBUG, "AUTH: wpa_validate_wpa_ie() failed");
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return -1;
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}
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wpa_auth_sm_event(wpa->auth, WPA_ASSOC);
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wpa_auth_sta_associated(wpa->auth_group, wpa->auth);
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return 0;
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}
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static void deinit(struct wpa *wpa)
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{
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wpa_auth_sta_deinit(wpa->auth);
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wpa_deinit(wpa->auth_group);
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os_free(wpa->supp_eapol);
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wpa->supp_eapol = NULL;
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}
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int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
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{
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struct wpa wpa;
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wpa_fuzzer_set_debug_level();
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if (os_program_init())
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return -1;
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os_memset(&wpa, 0, sizeof(wpa));
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wpa.data = data;
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wpa.data_len = size;
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os_memset(wpa.auth_addr, 0x12, ETH_ALEN);
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os_memset(wpa.supp_addr, 0x32, ETH_ALEN);
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os_memset(wpa.psk, 0x44, PMK_LEN);
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if (eloop_init()) {
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wpa_printf(MSG_ERROR, "Failed to initialize event loop");
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goto fail;
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}
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if (auth_init_group(&wpa) < 0)
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goto fail;
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if (auth_init(&wpa) < 0)
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goto fail;
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wpa_printf(MSG_DEBUG, "Starting eloop");
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eloop_run();
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wpa_printf(MSG_DEBUG, "eloop done");
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fail:
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deinit(&wpa);
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eloop_destroy();
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os_program_deinit();
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return 0;
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}
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