1 /*
2 * hostapd / Configuration helper functions
3 * Copyright (c) 2003-2012, Jouni Malinen <j@w1.fi>
4 *
5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
7 */
8
9 #include "utils/includes.h"
10
11 #include "utils/common.h"
12 #include "crypto/sha1.h"
13 #include "common/ieee802_11_defs.h"
14 #include "common/eapol_common.h"
15 #include "common/sae.h"
16 #include "ap/wpa_auth.h"
17 #include "ap/ap_config.h"
18 #include "utils/wpa_debug.h"
19 #include "ap/hostapd.h"
20 #include "ap/wpa_auth_i.h"
21 #include "esp_wifi_driver.h"
22 #include "esp_wifi_types.h"
23
hostapd_config_defaults_bss(struct hostapd_bss_config * bss)24 void hostapd_config_defaults_bss(struct hostapd_bss_config *bss)
25 {
26 bss->auth_algs = WPA_AUTH_ALG_OPEN | WPA_AUTH_ALG_SHARED;
27
28 bss->wep_rekeying_period = 300;
29 /* use key0 in individual key and key1 in broadcast key */
30 bss->broadcast_key_idx_min = 1;
31 bss->broadcast_key_idx_max = 2;
32
33 bss->wpa_group_rekey = 600;
34 bss->wpa_gmk_rekey = 86400;
35 bss->wpa_key_mgmt = WPA_KEY_MGMT_PSK;
36 bss->wpa_pairwise = WPA_CIPHER_TKIP;
37 bss->wpa_group = WPA_CIPHER_TKIP;
38 bss->rsn_pairwise = 0;
39
40 bss->max_num_sta = MAX_STA_COUNT;
41
42 bss->dtim_period = 2;
43
44 bss->ap_max_inactivity = 5*60; //AP_MAX_INACTIVITY;
45 bss->eapol_version = EAPOL_VERSION;
46
47 bss->max_listen_interval = 65535;
48
49 #ifdef CONFIG_IEEE80211W
50 bss->assoc_sa_query_max_timeout = 1000;
51 bss->assoc_sa_query_retry_timeout = 201;
52 #endif /* CONFIG_IEEE80211W */
53 #ifdef EAP_SERVER_FAST
54 /* both anonymous and authenticated provisioning */
55 bss->eap_fast_prov = 3;
56 bss->pac_key_lifetime = 7 * 24 * 60 * 60;
57 bss->pac_key_refresh_time = 1 * 24 * 60 * 60;
58 #endif /* EAP_SERVER_FAST */
59
60 /* Set to -1 as defaults depends on HT in setup */
61 bss->wmm_enabled = -1;
62
63 #ifdef CONFIG_IEEE80211R
64 bss->ft_over_ds = 1;
65 #endif /* CONFIG_IEEE80211R */
66
67 }
68
69
hostapd_config_defaults(void)70 struct hostapd_config * hostapd_config_defaults(void)
71 {
72 #define ecw2cw(ecw) ((1 << (ecw)) - 1)
73
74 struct hostapd_config *conf;
75 struct hostapd_bss_config *bss;
76 #undef ecw2cw
77
78 conf = (struct hostapd_config *)os_zalloc(sizeof(*conf));
79 bss = (struct hostapd_bss_config *)os_zalloc(sizeof(*bss));
80 if (conf == NULL || bss == NULL) {
81 wpa_printf(MSG_DEBUG, "Failed to allocate memory for "
82 "configuration data.");
83 os_free(conf);
84 os_free(bss);
85 return NULL;
86 }
87
88 hostapd_config_defaults_bss(bss);
89
90 conf->num_bss = 1;
91 conf->bss = bss;
92
93 conf->beacon_int = 100;
94 conf->rts_threshold = -1; /* use driver default: 2347 */
95 conf->fragm_threshold = -1; /* user driver default: 2346 */
96 conf->send_probe_response = 1;
97
98 conf->ht_capab = HT_CAP_INFO_SMPS_DISABLED;
99
100 conf->ap_table_max_size = 255;
101 conf->ap_table_expiration_time = 60;
102
103 return conf;
104 }
105
106
hostapd_mac_comp(const void * a,const void * b)107 int hostapd_mac_comp(const void *a, const void *b)
108 {
109 return memcmp(a, b, sizeof(macaddr));
110 }
111
112
hostapd_mac_comp_empty(const void * a)113 int hostapd_mac_comp_empty(const void *a)
114 {
115 u8 empty[ETH_ALEN];
116
117 os_bzero(empty, ETH_ALEN);
118
119 return memcmp(a, empty, ETH_ALEN);
120 }
121
hostapd_derive_psk(struct hostapd_ssid * ssid)122 static int hostapd_derive_psk(struct hostapd_ssid *ssid)
123 {
124 ssid->wpa_psk = (struct hostapd_wpa_psk *)os_zalloc(sizeof(struct hostapd_wpa_psk));
125 if (ssid->wpa_psk == NULL) {
126 wpa_printf(MSG_ERROR, "Unable to alloc space for PSK");
127 return -1;
128 }
129 wpa_hexdump_ascii(MSG_DEBUG, "SSID",
130 (u8 *) ssid->ssid, ssid->ssid_len);
131 wpa_hexdump_ascii_key(MSG_DEBUG, "PSK (ASCII passphrase)",
132 (u8 *) ssid->wpa_passphrase,
133 strlen(ssid->wpa_passphrase));
134 #ifdef ESP_SUPPLICANT
135 memcpy(ssid->wpa_psk->psk, esp_wifi_ap_get_prof_pmk_internal(), PMK_LEN);
136 #else
137 /* It's too SLOW */
138 pbkdf2_sha1(ssid->wpa_passphrase,
139 ssid->ssid, ssid->ssid_len,
140 4096, ssid->wpa_psk->psk, PMK_LEN);
141 #endif
142 wpa_hexdump_key(MSG_DEBUG, "PSK (from passphrase)",
143 ssid->wpa_psk->psk, PMK_LEN);
144 return 0;
145 }
146
147
hostapd_setup_sae_pt(struct hostapd_bss_config * conf)148 int hostapd_setup_sae_pt(struct hostapd_bss_config *conf)
149 {
150 #ifdef CONFIG_SAE
151 struct hostapd_ssid *ssid = &conf->ssid;
152 if ((conf->sae_pwe == SAE_PWE_HUNT_AND_PECK ||
153 !wpa_key_mgmt_sae(conf->wpa_key_mgmt)))
154 return 0; /* PT not needed */
155
156 sae_deinit_pt(ssid->pt);
157 ssid->pt = NULL;
158 if (ssid->wpa_passphrase) {
159 ssid->pt = sae_derive_pt(conf->sae_groups, ssid->ssid,
160 ssid->ssid_len,
161 (const u8 *) ssid->wpa_passphrase,
162 os_strlen(ssid->wpa_passphrase),
163 NULL);
164 if (!ssid->pt)
165 return -1;
166 }
167
168 #endif /* CONFIG_SAE */
169
170 return 0;
171 }
172
173
hostapd_setup_wpa_psk(struct hostapd_bss_config * conf)174 int hostapd_setup_wpa_psk(struct hostapd_bss_config *conf)
175 {
176 struct hostapd_ssid *ssid = &conf->ssid;
177
178 if (hostapd_setup_sae_pt(conf) < 0)
179 return -1;
180
181 if (ssid->wpa_passphrase != NULL) {
182 if (ssid->wpa_psk != NULL) {
183 wpa_printf(MSG_DEBUG, "Using pre-configured WPA PSK "
184 "instead of passphrase");
185 } else {
186 wpa_printf(MSG_DEBUG, "Deriving WPA PSK based on "
187 "passphrase\n");
188 if (hostapd_derive_psk(ssid) < 0)
189 return -1;
190 }
191 ssid->wpa_psk->group = 1;
192 }
193
194 return 0;
195 }
196
197
hostapd_wep_key_cmp(struct hostapd_wep_keys * a,struct hostapd_wep_keys * b)198 int hostapd_wep_key_cmp(struct hostapd_wep_keys *a, struct hostapd_wep_keys *b)
199 {
200 int i;
201
202 if (a->idx != b->idx || a->default_len != b->default_len)
203 return 1;
204 for (i = 0; i < NUM_WEP_KEYS; i++)
205 if (a->len[i] != b->len[i] ||
206 memcmp(a->key[i], b->key[i], a->len[i]) != 0)
207 return 1;
208 return 0;
209 }
210
211 /**
212 * hostapd_maclist_found - Find a MAC address from a list
213 * @list: MAC address list
214 * @num_entries: Number of addresses in the list
215 * @addr: Address to search for
216 * @vlan_id: Buffer for returning VLAN ID or %NULL if not needed
217 * Returns: 1 if address is in the list or 0 if not.
218 *
219 * Perform a binary search for given MAC address from a pre-sorted list.
220 */
hostapd_maclist_found(struct mac_acl_entry * list,int num_entries,const u8 * addr,int * vlan_id)221 int hostapd_maclist_found(struct mac_acl_entry *list, int num_entries,
222 const u8 *addr, int *vlan_id)
223 {
224 int start, end, middle, res;
225
226 start = 0;
227 end = num_entries - 1;
228
229 while (start <= end) {
230 middle = (start + end) / 2;
231 res = memcmp(list[middle].addr, addr, ETH_ALEN);
232 if (res == 0) {
233 if (vlan_id)
234 *vlan_id = list[middle].vlan_id;
235 return 1;
236 }
237 if (res < 0)
238 start = middle + 1;
239 else
240 end = middle - 1;
241 }
242
243 return 0;
244 }
245
246
hostapd_rate_found(int * list,int rate)247 int hostapd_rate_found(int *list, int rate)
248 {
249 int i;
250
251 if (list == NULL)
252 return 0;
253
254 for (i = 0; list[i] >= 0; i++)
255 if (list[i] == rate)
256 return 1;
257
258 return 0;
259 }
260
hostapd_get_psk(const struct hostapd_bss_config * conf,const u8 * addr,const u8 * prev_psk)261 const u8 * hostapd_get_psk(const struct hostapd_bss_config *conf,
262 const u8 *addr, const u8 *prev_psk)
263 {
264 struct hostapd_wpa_psk *psk;
265 int next_ok = prev_psk == NULL;
266
267 for (psk = conf->ssid.wpa_psk; psk != NULL; psk = psk->next) {
268 if (next_ok &&
269 (psk->group || memcmp(psk->addr, addr, ETH_ALEN) == 0))
270 return psk->psk;
271
272 if (psk->psk == prev_psk)
273 next_ok = 1;
274 }
275
276 return NULL;
277 }
278
hostapd_config_clear_wpa_psk(struct hostapd_wpa_psk ** l)279 void hostapd_config_clear_wpa_psk(struct hostapd_wpa_psk **l)
280 {
281 struct hostapd_wpa_psk *psk, *tmp;
282
283 for (psk = *l; psk;) {
284 tmp = psk;
285 psk = psk->next;
286 bin_clear_free(tmp, sizeof(*tmp));
287 }
288 *l = NULL;
289 }
290
hostapd_config_free_bss(struct hostapd_bss_config * conf)291 void hostapd_config_free_bss(struct hostapd_bss_config *conf)
292 {
293 hostapd_config_clear_wpa_psk(&conf->ssid.wpa_psk);
294 #ifdef CONFIG_SAE
295 sae_deinit_pt(conf->ssid.pt);
296 #endif /* CONFIG_SAE */
297 os_free(conf);
298 }
299