Hai Shalom | 6084025 | 2021-02-19 19:02:11 -0800 | [diff] [blame] | 1 | /* |
| 2 | * wpa_supplicant - PASN processing |
| 3 | * |
| 4 | * Copyright (C) 2019 Intel Corporation |
| 5 | * |
| 6 | * This software may be distributed under the terms of the BSD license. |
| 7 | * See README for more details. |
| 8 | */ |
| 9 | |
| 10 | #include "includes.h" |
| 11 | |
| 12 | #include "common/ieee802_11_defs.h" |
| 13 | #include "common/ieee802_11_common.h" |
| 14 | #include "common/dragonfly.h" |
| 15 | #include "common/ptksa_cache.h" |
| 16 | #include "utils/eloop.h" |
| 17 | #include "drivers/driver.h" |
| 18 | #include "crypto/crypto.h" |
| 19 | #include "crypto/random.h" |
| 20 | #include "eap_common/eap_defs.h" |
| 21 | #include "rsn_supp/wpa.h" |
| 22 | #include "rsn_supp/pmksa_cache.h" |
| 23 | #include "wpa_supplicant_i.h" |
| 24 | #include "driver_i.h" |
| 25 | #include "bss.h" |
| 26 | #include "config.h" |
| 27 | |
| 28 | static const int dot11RSNAConfigPMKLifetime = 43200; |
| 29 | |
| 30 | struct wpa_pasn_auth_work { |
| 31 | u8 bssid[ETH_ALEN]; |
| 32 | int akmp; |
| 33 | int cipher; |
| 34 | u16 group; |
| 35 | int network_id; |
| 36 | }; |
| 37 | |
| 38 | |
| 39 | static void wpas_pasn_auth_work_timeout(void *eloop_ctx, void *timeout_ctx) |
| 40 | { |
| 41 | struct wpa_supplicant *wpa_s = eloop_ctx; |
| 42 | |
| 43 | wpa_printf(MSG_DEBUG, "PASN: Auth work timeout - stopping auth"); |
| 44 | |
| 45 | wpas_pasn_auth_stop(wpa_s); |
| 46 | } |
| 47 | |
| 48 | |
| 49 | static void wpas_pasn_cancel_auth_work(struct wpa_supplicant *wpa_s) |
| 50 | { |
| 51 | wpa_printf(MSG_DEBUG, "PASN: Cancel pasn-start-auth work"); |
| 52 | |
| 53 | /* Remove pending/started work */ |
| 54 | radio_remove_works(wpa_s, "pasn-start-auth", 0); |
| 55 | } |
| 56 | |
| 57 | |
| 58 | static void wpas_pasn_auth_status(struct wpa_supplicant *wpa_s, const u8 *bssid, |
| 59 | int akmp, int cipher, u8 status) |
| 60 | { |
| 61 | wpa_msg(wpa_s, MSG_INFO, |
| 62 | PASN_AUTH_STATUS MACSTR " akmp=%s, status=%u", |
| 63 | MAC2STR(bssid), wpa_key_mgmt_txt(akmp, WPA_PROTO_RSN), |
| 64 | status); |
| 65 | } |
| 66 | |
| 67 | |
| 68 | #ifdef CONFIG_SAE |
| 69 | |
| 70 | static struct wpabuf * wpas_pasn_wd_sae_commit(struct wpa_supplicant *wpa_s) |
| 71 | { |
| 72 | struct wpas_pasn *pasn = &wpa_s->pasn; |
| 73 | struct wpabuf *buf = NULL; |
| 74 | const char *password = NULL; |
| 75 | int ret; |
| 76 | |
| 77 | if (pasn->ssid) { |
| 78 | password = pasn->ssid->sae_password; |
| 79 | if (!password) |
| 80 | password = pasn->ssid->passphrase; |
| 81 | } |
| 82 | |
| 83 | if (!password) { |
| 84 | wpa_printf(MSG_DEBUG, "PASN: SAE without a password"); |
| 85 | return NULL; |
| 86 | } |
| 87 | |
| 88 | ret = sae_set_group(&pasn->sae, pasn->group); |
| 89 | if (ret) { |
| 90 | wpa_printf(MSG_DEBUG, "PASN: Failed to set SAE group"); |
| 91 | return NULL; |
| 92 | } |
| 93 | |
| 94 | /* TODO: SAE H2E */ |
| 95 | ret = sae_prepare_commit(wpa_s->own_addr, pasn->bssid, |
| 96 | (const u8 *) password, os_strlen(password), 0, |
| 97 | &pasn->sae); |
| 98 | if (ret) { |
| 99 | wpa_printf(MSG_DEBUG, "PASN: Failed to prepare SAE commit"); |
| 100 | return NULL; |
| 101 | } |
| 102 | |
| 103 | /* Need to add the entire Authentication frame body */ |
| 104 | buf = wpabuf_alloc(6 + SAE_COMMIT_MAX_LEN); |
| 105 | if (!buf) { |
| 106 | wpa_printf(MSG_DEBUG, "PASN: Failed to allocate SAE buffer"); |
| 107 | return NULL; |
| 108 | } |
| 109 | |
| 110 | wpabuf_put_le16(buf, WLAN_AUTH_SAE); |
| 111 | wpabuf_put_le16(buf, 1); |
| 112 | wpabuf_put_le16(buf, WLAN_STATUS_SUCCESS); |
| 113 | |
| 114 | sae_write_commit(&pasn->sae, buf, NULL, 0); |
| 115 | pasn->sae.state = SAE_COMMITTED; |
| 116 | |
| 117 | return buf; |
| 118 | } |
| 119 | |
| 120 | |
| 121 | static int wpas_pasn_wd_sae_rx(struct wpa_supplicant *wpa_s, struct wpabuf *wd) |
| 122 | { |
| 123 | struct wpas_pasn *pasn = &wpa_s->pasn; |
| 124 | const u8 *data; |
| 125 | size_t buf_len; |
| 126 | u16 len, res, alg, seq, status; |
| 127 | int groups[] = { pasn->group, 0 }; |
| 128 | int ret; |
| 129 | |
| 130 | if (!wd) |
| 131 | return -1; |
| 132 | |
| 133 | data = wpabuf_head_u8(wd); |
| 134 | buf_len = wpabuf_len(wd); |
| 135 | |
| 136 | /* first handle the commit message */ |
| 137 | if (buf_len < 2) { |
| 138 | wpa_printf(MSG_DEBUG, "PASN: SAE buffer too short (commit)"); |
| 139 | return -1; |
| 140 | } |
| 141 | |
| 142 | len = WPA_GET_LE16(data); |
| 143 | if (len < 6 || buf_len - 2 < len) { |
| 144 | wpa_printf(MSG_DEBUG, "PASN: SAE buffer too short for commit"); |
| 145 | return -1; |
| 146 | } |
| 147 | |
| 148 | buf_len -= 2; |
| 149 | data += 2; |
| 150 | |
| 151 | alg = WPA_GET_LE16(data); |
| 152 | seq = WPA_GET_LE16(data + 2); |
| 153 | status = WPA_GET_LE16(data + 4); |
| 154 | |
| 155 | wpa_printf(MSG_DEBUG, "PASN: SAE: commit: alg=%u, seq=%u, status=%u", |
| 156 | alg, seq, status); |
| 157 | |
| 158 | /* TODO: SAE H2E */ |
| 159 | if (alg != WLAN_AUTH_SAE || seq != 1 || status != WLAN_STATUS_SUCCESS) { |
| 160 | wpa_printf(MSG_DEBUG, "PASN: SAE: dropping peer commit"); |
| 161 | return -1; |
| 162 | } |
| 163 | |
| 164 | res = sae_parse_commit(&pasn->sae, data + 6, len - 6, NULL, 0, groups, |
| 165 | 0); |
| 166 | if (res != WLAN_STATUS_SUCCESS) { |
| 167 | wpa_printf(MSG_DEBUG, "PASN: SAE failed parsing commit"); |
| 168 | return -1; |
| 169 | } |
| 170 | |
| 171 | /* Process the commit message and derive the PMK */ |
| 172 | ret = sae_process_commit(&pasn->sae); |
| 173 | if (ret) { |
| 174 | wpa_printf(MSG_DEBUG, "SAE: Failed to process peer commit"); |
| 175 | return -1; |
| 176 | } |
| 177 | |
| 178 | buf_len -= len; |
| 179 | data += len; |
| 180 | |
| 181 | /* Handle the confirm message */ |
| 182 | if (buf_len < 2) { |
| 183 | wpa_printf(MSG_DEBUG, "PASN: SAE buffer too short (confirm)"); |
| 184 | return -1; |
| 185 | } |
| 186 | |
| 187 | len = WPA_GET_LE16(data); |
| 188 | if (len < 6 || buf_len - 2 < len) { |
| 189 | wpa_printf(MSG_DEBUG, "PASN: SAE buffer too short for confirm"); |
| 190 | return -1; |
| 191 | } |
| 192 | |
| 193 | buf_len -= 2; |
| 194 | data += 2; |
| 195 | |
| 196 | alg = WPA_GET_LE16(data); |
| 197 | seq = WPA_GET_LE16(data + 2); |
| 198 | status = WPA_GET_LE16(data + 4); |
| 199 | |
| 200 | wpa_printf(MSG_DEBUG, "PASN: SAE confirm: alg=%u, seq=%u, status=%u", |
| 201 | alg, seq, status); |
| 202 | |
| 203 | if (alg != WLAN_AUTH_SAE || seq != 2 || status != WLAN_STATUS_SUCCESS) { |
| 204 | wpa_printf(MSG_DEBUG, "PASN: Dropping peer SAE confirm"); |
| 205 | return -1; |
| 206 | } |
| 207 | |
| 208 | res = sae_check_confirm(&pasn->sae, data + 6, len - 6); |
| 209 | if (res != WLAN_STATUS_SUCCESS) { |
| 210 | wpa_printf(MSG_DEBUG, "PASN: SAE failed checking confirm"); |
| 211 | return -1; |
| 212 | } |
| 213 | |
| 214 | wpa_printf(MSG_DEBUG, "PASN: SAE completed successfully"); |
| 215 | pasn->sae.state = SAE_ACCEPTED; |
| 216 | |
| 217 | return 0; |
| 218 | } |
| 219 | |
| 220 | |
| 221 | static struct wpabuf * wpas_pasn_wd_sae_confirm(struct wpa_supplicant *wpa_s) |
| 222 | { |
| 223 | struct wpas_pasn *pasn = &wpa_s->pasn; |
| 224 | struct wpabuf *buf = NULL; |
| 225 | |
| 226 | /* Need to add the entire authentication frame body */ |
| 227 | buf = wpabuf_alloc(6 + SAE_CONFIRM_MAX_LEN); |
| 228 | if (!buf) { |
| 229 | wpa_printf(MSG_DEBUG, "PASN: Failed to allocate SAE buffer"); |
| 230 | return NULL; |
| 231 | } |
| 232 | |
| 233 | wpabuf_put_le16(buf, WLAN_AUTH_SAE); |
| 234 | wpabuf_put_le16(buf, 2); |
| 235 | wpabuf_put_le16(buf, WLAN_STATUS_SUCCESS); |
| 236 | |
| 237 | sae_write_confirm(&pasn->sae, buf); |
| 238 | pasn->sae.state = SAE_CONFIRMED; |
| 239 | |
| 240 | return buf; |
| 241 | } |
| 242 | |
| 243 | #endif /* CONFIG_SAE */ |
| 244 | |
| 245 | |
| 246 | #ifdef CONFIG_FILS |
| 247 | |
| 248 | static struct wpabuf * wpas_pasn_fils_build_auth(struct wpa_supplicant *wpa_s) |
| 249 | { |
| 250 | struct wpas_pasn *pasn = &wpa_s->pasn; |
| 251 | struct wpabuf *buf = NULL; |
| 252 | struct wpabuf *erp_msg; |
| 253 | int ret; |
| 254 | |
| 255 | erp_msg = eapol_sm_build_erp_reauth_start(wpa_s->eapol); |
| 256 | if (!erp_msg) { |
| 257 | wpa_printf(MSG_DEBUG, |
| 258 | "PASN: FILS: ERP EAP-Initiate/Re-auth unavailable"); |
| 259 | return NULL; |
| 260 | } |
| 261 | |
| 262 | if (random_get_bytes(pasn->fils.nonce, FILS_NONCE_LEN) < 0 || |
| 263 | random_get_bytes(pasn->fils.session, FILS_SESSION_LEN) < 0) |
| 264 | goto fail; |
| 265 | |
| 266 | wpa_hexdump(MSG_DEBUG, "PASN: FILS: Nonce", pasn->fils.nonce, |
| 267 | FILS_NONCE_LEN); |
| 268 | |
| 269 | wpa_hexdump(MSG_DEBUG, "PASN: FILS: Session", pasn->fils.session, |
| 270 | FILS_SESSION_LEN); |
| 271 | |
| 272 | buf = wpabuf_alloc(1500); |
| 273 | if (!buf) |
| 274 | goto fail; |
| 275 | |
| 276 | /* Add the authentication algorithm */ |
| 277 | wpabuf_put_le16(buf, WLAN_AUTH_FILS_SK); |
| 278 | |
| 279 | /* Authentication Transaction seq# */ |
| 280 | wpabuf_put_le16(buf, 1); |
| 281 | |
| 282 | /* Status Code */ |
| 283 | wpabuf_put_le16(buf, WLAN_STATUS_SUCCESS); |
| 284 | |
| 285 | /* Own RSNE */ |
| 286 | wpa_pasn_add_rsne(buf, NULL, pasn->akmp, pasn->cipher); |
| 287 | |
| 288 | /* FILS Nonce */ |
| 289 | wpabuf_put_u8(buf, WLAN_EID_EXTENSION); |
| 290 | wpabuf_put_u8(buf, 1 + FILS_NONCE_LEN); |
| 291 | wpabuf_put_u8(buf, WLAN_EID_EXT_FILS_NONCE); |
| 292 | wpabuf_put_data(buf, pasn->fils.nonce, FILS_NONCE_LEN); |
| 293 | |
| 294 | /* FILS Session */ |
| 295 | wpabuf_put_u8(buf, WLAN_EID_EXTENSION); |
| 296 | wpabuf_put_u8(buf, 1 + FILS_SESSION_LEN); |
| 297 | wpabuf_put_u8(buf, WLAN_EID_EXT_FILS_SESSION); |
| 298 | wpabuf_put_data(buf, pasn->fils.session, FILS_SESSION_LEN); |
| 299 | |
| 300 | /* Wrapped Data (ERP) */ |
| 301 | wpabuf_put_u8(buf, WLAN_EID_EXTENSION); |
| 302 | wpabuf_put_u8(buf, 1 + wpabuf_len(erp_msg)); |
| 303 | wpabuf_put_u8(buf, WLAN_EID_EXT_WRAPPED_DATA); |
| 304 | wpabuf_put_buf(buf, erp_msg); |
| 305 | |
| 306 | /* |
| 307 | * Calculate pending PMKID here so that we do not need to maintain a |
| 308 | * copy of the EAP-Initiate/Reauth message. |
| 309 | */ |
| 310 | ret = fils_pmkid_erp(pasn->akmp, wpabuf_head(erp_msg), |
| 311 | wpabuf_len(erp_msg), |
| 312 | pasn->fils.erp_pmkid); |
| 313 | if (ret) { |
| 314 | wpa_printf(MSG_DEBUG, "PASN: FILS: Failed to get ERP PMKID"); |
| 315 | goto fail; |
| 316 | } |
| 317 | |
| 318 | wpabuf_free(erp_msg); |
| 319 | erp_msg = NULL; |
| 320 | |
| 321 | wpa_hexdump_buf(MSG_DEBUG, "PASN: FILS: Authentication frame", buf); |
| 322 | return buf; |
| 323 | fail: |
| 324 | wpabuf_free(erp_msg); |
| 325 | wpabuf_free(buf); |
| 326 | return NULL; |
| 327 | } |
| 328 | |
| 329 | |
| 330 | static void wpas_pasn_initiate_eapol(struct wpa_supplicant *wpa_s) |
| 331 | { |
| 332 | struct wpas_pasn *pasn = &wpa_s->pasn; |
| 333 | struct eapol_config eapol_conf; |
| 334 | struct wpa_ssid *ssid = pasn->ssid; |
| 335 | |
| 336 | wpa_printf(MSG_DEBUG, "PASN: FILS: Initiating EAPOL"); |
| 337 | |
| 338 | eapol_sm_notify_eap_success(wpa_s->eapol, false); |
| 339 | eapol_sm_notify_eap_fail(wpa_s->eapol, false); |
| 340 | eapol_sm_notify_portControl(wpa_s->eapol, Auto); |
| 341 | |
| 342 | os_memset(&eapol_conf, 0, sizeof(eapol_conf)); |
| 343 | eapol_conf.fast_reauth = wpa_s->conf->fast_reauth; |
| 344 | eapol_conf.workaround = ssid->eap_workaround; |
| 345 | |
| 346 | eapol_sm_notify_config(wpa_s->eapol, &ssid->eap, &eapol_conf); |
| 347 | } |
| 348 | |
| 349 | |
| 350 | static struct wpabuf * wpas_pasn_wd_fils_auth(struct wpa_supplicant *wpa_s) |
| 351 | { |
| 352 | struct wpas_pasn *pasn = &wpa_s->pasn; |
| 353 | struct wpa_bss *bss; |
| 354 | const u8 *indic; |
| 355 | u16 fils_info; |
| 356 | |
| 357 | wpa_printf(MSG_DEBUG, "PASN: FILS: wrapped data - completed=%u", |
| 358 | pasn->fils.completed); |
| 359 | |
| 360 | /* Nothing to add as we are done */ |
| 361 | if (pasn->fils.completed) |
| 362 | return NULL; |
| 363 | |
| 364 | if (!pasn->ssid) { |
| 365 | wpa_printf(MSG_DEBUG, "PASN: FILS: No network block"); |
| 366 | return NULL; |
| 367 | } |
| 368 | |
| 369 | bss = wpa_bss_get_bssid(wpa_s, pasn->bssid); |
| 370 | if (!bss) { |
| 371 | wpa_printf(MSG_DEBUG, "PASN: FILS: BSS not found"); |
| 372 | return NULL; |
| 373 | } |
| 374 | |
| 375 | indic = wpa_bss_get_ie(bss, WLAN_EID_FILS_INDICATION); |
| 376 | if (!indic || indic[1] < 2) { |
| 377 | wpa_printf(MSG_DEBUG, "PASN: Missing FILS Indication IE"); |
| 378 | return NULL; |
| 379 | } |
| 380 | |
| 381 | fils_info = WPA_GET_LE16(indic + 2); |
| 382 | if (!(fils_info & BIT(9))) { |
| 383 | wpa_printf(MSG_DEBUG, |
| 384 | "PASN: FILS auth without PFS not supported"); |
| 385 | return NULL; |
| 386 | } |
| 387 | |
| 388 | wpas_pasn_initiate_eapol(wpa_s); |
| 389 | |
| 390 | return wpas_pasn_fils_build_auth(wpa_s); |
| 391 | } |
| 392 | |
| 393 | |
| 394 | static int wpas_pasn_wd_fils_rx(struct wpa_supplicant *wpa_s, struct wpabuf *wd) |
| 395 | { |
| 396 | struct wpas_pasn *pasn = &wpa_s->pasn; |
| 397 | struct ieee802_11_elems elems; |
| 398 | struct wpa_ie_data rsne_data; |
| 399 | u8 rmsk[ERP_MAX_KEY_LEN]; |
| 400 | size_t rmsk_len; |
| 401 | u8 anonce[FILS_NONCE_LEN]; |
| 402 | const u8 *data; |
| 403 | size_t buf_len; |
| 404 | struct wpabuf *fils_wd = NULL; |
| 405 | u16 alg, seq, status; |
| 406 | int ret; |
| 407 | |
| 408 | if (!wd) |
| 409 | return -1; |
| 410 | |
| 411 | data = wpabuf_head(wd); |
| 412 | buf_len = wpabuf_len(wd); |
| 413 | |
| 414 | wpa_hexdump(MSG_DEBUG, "PASN: FILS: Authentication frame len=%zu", |
| 415 | data, buf_len); |
| 416 | |
| 417 | /* first handle the header */ |
| 418 | if (buf_len < 6) { |
| 419 | wpa_printf(MSG_DEBUG, "PASN: FILS: Buffer too short"); |
| 420 | return -1; |
| 421 | } |
| 422 | |
| 423 | alg = WPA_GET_LE16(data); |
| 424 | seq = WPA_GET_LE16(data + 2); |
| 425 | status = WPA_GET_LE16(data + 4); |
| 426 | |
| 427 | wpa_printf(MSG_DEBUG, "PASN: FILS: commit: alg=%u, seq=%u, status=%u", |
| 428 | alg, seq, status); |
| 429 | |
| 430 | if (alg != WLAN_AUTH_FILS_SK || seq != 2 || |
| 431 | status != WLAN_STATUS_SUCCESS) { |
| 432 | wpa_printf(MSG_DEBUG, |
| 433 | "PASN: FILS: Dropping peer authentication"); |
| 434 | return -1; |
| 435 | } |
| 436 | |
| 437 | data += 6; |
| 438 | buf_len -= 6; |
| 439 | |
| 440 | if (ieee802_11_parse_elems(data, buf_len, &elems, 1) == ParseFailed) { |
| 441 | wpa_printf(MSG_DEBUG, "PASN: FILS: Could not parse elements"); |
| 442 | return -1; |
| 443 | } |
| 444 | |
| 445 | if (!elems.rsn_ie || !elems.fils_nonce || !elems.fils_nonce || |
| 446 | !elems.wrapped_data) { |
| 447 | wpa_printf(MSG_DEBUG, "PASN: FILS: Missing IEs"); |
| 448 | return -1; |
| 449 | } |
| 450 | |
| 451 | ret = wpa_parse_wpa_ie(elems.rsn_ie - 2, elems.rsn_ie_len + 2, |
| 452 | &rsne_data); |
| 453 | if (ret) { |
| 454 | wpa_printf(MSG_DEBUG, "PASN: FILS: Failed parsing RNSE"); |
| 455 | return -1; |
| 456 | } |
| 457 | |
| 458 | ret = wpa_pasn_validate_rsne(&rsne_data); |
| 459 | if (ret) { |
| 460 | wpa_printf(MSG_DEBUG, "PASN: FILS: Failed validating RSNE"); |
| 461 | return -1; |
| 462 | } |
| 463 | |
| 464 | if (rsne_data.num_pmkid) { |
| 465 | wpa_printf(MSG_DEBUG, |
| 466 | "PASN: FILS: Not expecting PMKID in RSNE"); |
| 467 | return -1; |
| 468 | } |
| 469 | |
| 470 | wpa_hexdump(MSG_DEBUG, "PASN: FILS: ANonce", elems.fils_nonce, |
| 471 | FILS_NONCE_LEN); |
| 472 | os_memcpy(anonce, elems.fils_nonce, FILS_NONCE_LEN); |
| 473 | |
| 474 | wpa_hexdump(MSG_DEBUG, "PASN: FILS: FILS Session", elems.fils_session, |
| 475 | FILS_SESSION_LEN); |
| 476 | |
| 477 | if (os_memcmp(pasn->fils.session, elems.fils_session, |
| 478 | FILS_SESSION_LEN)) { |
| 479 | wpa_printf(MSG_DEBUG, "PASN: FILS: Session mismatch"); |
| 480 | return -1; |
| 481 | } |
| 482 | |
| 483 | fils_wd = ieee802_11_defrag(&elems, WLAN_EID_EXTENSION, |
| 484 | WLAN_EID_EXT_WRAPPED_DATA); |
| 485 | |
| 486 | if (!fils_wd) { |
| 487 | wpa_printf(MSG_DEBUG, |
| 488 | "PASN: FILS: Failed getting wrapped data"); |
| 489 | return -1; |
| 490 | } |
| 491 | |
| 492 | eapol_sm_process_erp_finish(wpa_s->eapol, wpabuf_head(fils_wd), |
| 493 | wpabuf_len(fils_wd)); |
| 494 | |
| 495 | wpabuf_free(fils_wd); |
| 496 | fils_wd = NULL; |
| 497 | |
| 498 | if (eapol_sm_failed(wpa_s->eapol)) { |
| 499 | wpa_printf(MSG_DEBUG, "PASN: FILS: ERP finish failed"); |
| 500 | return -1; |
| 501 | } |
| 502 | |
| 503 | rmsk_len = ERP_MAX_KEY_LEN; |
| 504 | ret = eapol_sm_get_key(wpa_s->eapol, rmsk, rmsk_len); |
| 505 | |
| 506 | if (ret == PMK_LEN) { |
| 507 | rmsk_len = PMK_LEN; |
| 508 | ret = eapol_sm_get_key(wpa_s->eapol, rmsk, rmsk_len); |
| 509 | } |
| 510 | |
| 511 | if (ret) { |
| 512 | wpa_printf(MSG_DEBUG, "PASN: FILS: Failed getting RMSK"); |
| 513 | return -1; |
| 514 | } |
| 515 | |
| 516 | ret = fils_rmsk_to_pmk(pasn->akmp, rmsk, rmsk_len, |
| 517 | pasn->fils.nonce, anonce, NULL, 0, |
| 518 | pasn->pmk, &pasn->pmk_len); |
| 519 | |
| 520 | forced_memzero(rmsk, sizeof(rmsk)); |
| 521 | |
| 522 | if (ret) { |
| 523 | wpa_printf(MSG_DEBUG, "PASN: FILS: Failed to derive PMK"); |
| 524 | return -1; |
| 525 | } |
| 526 | |
| 527 | wpa_hexdump(MSG_DEBUG, "PASN: FILS: PMKID", pasn->fils.erp_pmkid, |
| 528 | PMKID_LEN); |
| 529 | |
| 530 | wpa_printf(MSG_DEBUG, "PASN: FILS: ERP processing succeeded"); |
| 531 | |
| 532 | wpa_pasn_pmksa_cache_add(wpa_s->wpa, pasn->pmk, |
| 533 | pasn->pmk_len, pasn->fils.erp_pmkid, |
| 534 | pasn->bssid, pasn->akmp); |
| 535 | |
| 536 | pasn->fils.completed = true; |
| 537 | return 0; |
| 538 | } |
| 539 | |
| 540 | #endif /* CONFIG_FILS */ |
| 541 | |
| 542 | |
| 543 | static struct wpabuf * wpas_pasn_get_wrapped_data(struct wpa_supplicant *wpa_s) |
| 544 | { |
| 545 | struct wpas_pasn *pasn = &wpa_s->pasn; |
| 546 | |
| 547 | if (pasn->using_pmksa) |
| 548 | return NULL; |
| 549 | |
| 550 | switch (pasn->akmp) { |
| 551 | case WPA_KEY_MGMT_PASN: |
| 552 | /* no wrapped data */ |
| 553 | return NULL; |
| 554 | case WPA_KEY_MGMT_SAE: |
| 555 | #ifdef CONFIG_SAE |
| 556 | if (pasn->trans_seq == 0) |
| 557 | return wpas_pasn_wd_sae_commit(wpa_s); |
| 558 | if (pasn->trans_seq == 2) |
| 559 | return wpas_pasn_wd_sae_confirm(wpa_s); |
| 560 | #endif /* CONFIG_SAE */ |
| 561 | wpa_printf(MSG_ERROR, |
| 562 | "PASN: SAE: Cannot derive wrapped data"); |
| 563 | return NULL; |
| 564 | case WPA_KEY_MGMT_FILS_SHA256: |
| 565 | case WPA_KEY_MGMT_FILS_SHA384: |
| 566 | #ifdef CONFIG_FILS |
| 567 | return wpas_pasn_wd_fils_auth(wpa_s); |
| 568 | #endif /* CONFIG_FILS */ |
| 569 | case WPA_KEY_MGMT_FT_PSK: |
| 570 | case WPA_KEY_MGMT_FT_IEEE8021X: |
| 571 | case WPA_KEY_MGMT_FT_IEEE8021X_SHA384: |
| 572 | /* |
| 573 | * Wrapped data with these AKMs is optional and is only needed |
| 574 | * for further validation of FT security parameters. For now do |
| 575 | * not use them. |
| 576 | */ |
| 577 | return NULL; |
| 578 | default: |
| 579 | wpa_printf(MSG_ERROR, |
| 580 | "PASN: TODO: Wrapped data for akmp=0x%x", |
| 581 | pasn->akmp); |
| 582 | return NULL; |
| 583 | } |
| 584 | } |
| 585 | |
| 586 | |
| 587 | static u8 wpas_pasn_get_wrapped_data_format(struct wpas_pasn *pasn) |
| 588 | { |
| 589 | if (pasn->using_pmksa) |
| 590 | return WPA_PASN_WRAPPED_DATA_NO; |
| 591 | |
| 592 | /* Note: Valid AKMP is expected to already be validated */ |
| 593 | switch (pasn->akmp) { |
| 594 | case WPA_KEY_MGMT_SAE: |
| 595 | return WPA_PASN_WRAPPED_DATA_SAE; |
| 596 | case WPA_KEY_MGMT_FILS_SHA256: |
| 597 | case WPA_KEY_MGMT_FILS_SHA384: |
| 598 | return WPA_PASN_WRAPPED_DATA_FILS_SK; |
| 599 | case WPA_KEY_MGMT_FT_PSK: |
| 600 | case WPA_KEY_MGMT_FT_IEEE8021X: |
| 601 | case WPA_KEY_MGMT_FT_IEEE8021X_SHA384: |
| 602 | /* |
| 603 | * Wrapped data with these AKMs is optional and is only needed |
| 604 | * for further validation of FT security parameters. For now do |
| 605 | * not use them. |
| 606 | */ |
| 607 | return WPA_PASN_WRAPPED_DATA_NO; |
| 608 | case WPA_KEY_MGMT_PASN: |
| 609 | default: |
| 610 | return WPA_PASN_WRAPPED_DATA_NO; |
| 611 | } |
| 612 | } |
| 613 | |
| 614 | |
| 615 | static struct wpabuf * wpas_pasn_build_auth_1(struct wpa_supplicant *wpa_s) |
| 616 | { |
| 617 | struct wpas_pasn *pasn = &wpa_s->pasn; |
| 618 | struct wpabuf *buf, *pubkey = NULL, *wrapped_data_buf = NULL; |
| 619 | const u8 *pmkid; |
| 620 | u8 wrapped_data; |
| 621 | int ret; |
| 622 | u16 capab; |
| 623 | |
| 624 | wpa_printf(MSG_DEBUG, "PASN: Building frame 1"); |
| 625 | |
| 626 | if (pasn->trans_seq) |
| 627 | return NULL; |
| 628 | |
| 629 | buf = wpabuf_alloc(1500); |
| 630 | if (!buf) |
| 631 | goto fail; |
| 632 | |
| 633 | /* Get public key */ |
| 634 | pubkey = crypto_ecdh_get_pubkey(pasn->ecdh, 0); |
| 635 | pubkey = wpabuf_zeropad(pubkey, crypto_ecdh_prime_len(pasn->ecdh)); |
| 636 | if (!pubkey) { |
| 637 | wpa_printf(MSG_DEBUG, "PASN: Failed to get pubkey"); |
| 638 | goto fail; |
| 639 | } |
| 640 | |
| 641 | wrapped_data = wpas_pasn_get_wrapped_data_format(pasn); |
| 642 | |
| 643 | wpa_pasn_build_auth_header(buf, pasn->bssid, |
| 644 | wpa_s->own_addr, pasn->bssid, |
| 645 | pasn->trans_seq + 1, WLAN_STATUS_SUCCESS); |
| 646 | |
| 647 | pmkid = NULL; |
| 648 | if (wpa_key_mgmt_ft(pasn->akmp)) { |
| 649 | ret = wpa_pasn_ft_derive_pmk_r1(wpa_s->wpa, pasn->akmp, |
| 650 | pasn->bssid, |
| 651 | pasn->pmk_r1, |
| 652 | &pasn->pmk_r1_len, |
| 653 | pasn->pmk_r1_name); |
| 654 | if (ret) { |
| 655 | wpa_printf(MSG_DEBUG, |
| 656 | "PASN: FT: Failed to derive keys"); |
| 657 | goto fail; |
| 658 | } |
| 659 | |
| 660 | pmkid = pasn->pmk_r1_name; |
| 661 | } else if (wrapped_data != WPA_PASN_WRAPPED_DATA_NO) { |
| 662 | struct rsn_pmksa_cache_entry *pmksa; |
| 663 | |
| 664 | pmksa = wpa_sm_pmksa_cache_get(wpa_s->wpa, pasn->bssid, |
| 665 | NULL, NULL, pasn->akmp); |
| 666 | if (pmksa) |
| 667 | pmkid = pmksa->pmkid; |
| 668 | |
| 669 | /* |
| 670 | * Note: Even when PMKSA is available, also add wrapped data as |
| 671 | * it is possible that the PMKID is no longer valid at the AP. |
| 672 | */ |
| 673 | wrapped_data_buf = wpas_pasn_get_wrapped_data(wpa_s); |
| 674 | } |
| 675 | |
| 676 | if (wpa_pasn_add_rsne(buf, pmkid, pasn->akmp, pasn->cipher) < 0) |
| 677 | goto fail; |
| 678 | |
| 679 | if (!wrapped_data_buf) |
| 680 | wrapped_data = WPA_PASN_WRAPPED_DATA_NO; |
| 681 | |
| 682 | wpa_pasn_add_parameter_ie(buf, pasn->group, wrapped_data, |
| 683 | pubkey, NULL, -1); |
| 684 | |
| 685 | if (wpa_pasn_add_wrapped_data(buf, wrapped_data_buf) < 0) |
| 686 | goto fail; |
| 687 | |
| 688 | /* Add own RNSXE */ |
| 689 | /* TODO: How to handle protected TWT and SAE H2E? */ |
| 690 | capab = 0; |
| 691 | if (wpa_s->drv_flags2 & WPA_DRIVER_FLAGS2_SEC_LTF) |
| 692 | capab |= BIT(WLAN_RSNX_CAPAB_SECURE_LTF); |
| 693 | if (wpa_s->drv_flags2 & WPA_DRIVER_FLAGS2_SEC_RTT) |
| 694 | capab |= BIT(WLAN_RSNX_CAPAB_SECURE_RTT); |
| 695 | if (wpa_s->drv_flags2 & WPA_DRIVER_FLAGS2_PROT_RANGE_NEG) |
| 696 | capab |= BIT(WLAN_RSNX_CAPAB_PROT_RANGE_NEG); |
| 697 | wpa_pasn_add_rsnxe(buf, capab); |
| 698 | |
| 699 | ret = pasn_auth_frame_hash(pasn->akmp, pasn->cipher, |
| 700 | wpabuf_head_u8(buf) + IEEE80211_HDRLEN, |
| 701 | wpabuf_len(buf) - IEEE80211_HDRLEN, |
| 702 | pasn->hash); |
| 703 | if (ret) { |
| 704 | wpa_printf(MSG_DEBUG, "PASN: Failed to compute hash"); |
| 705 | goto fail; |
| 706 | } |
| 707 | |
| 708 | pasn->trans_seq++; |
| 709 | |
| 710 | wpabuf_free(wrapped_data_buf); |
| 711 | wpabuf_free(pubkey); |
| 712 | |
| 713 | wpa_printf(MSG_DEBUG, "PASN: Frame 1: Success"); |
| 714 | return buf; |
| 715 | fail: |
| 716 | pasn->status = WLAN_STATUS_UNSPECIFIED_FAILURE; |
| 717 | wpabuf_free(wrapped_data_buf); |
| 718 | wpabuf_free(pubkey); |
| 719 | wpabuf_free(buf); |
| 720 | return NULL; |
| 721 | } |
| 722 | |
| 723 | |
| 724 | static struct wpabuf * wpas_pasn_build_auth_3(struct wpa_supplicant *wpa_s) |
| 725 | { |
| 726 | struct wpas_pasn *pasn = &wpa_s->pasn; |
| 727 | struct wpabuf *buf, *wrapped_data_buf = NULL; |
| 728 | u8 mic[WPA_PASN_MAX_MIC_LEN]; |
| 729 | u8 mic_len, data_len; |
| 730 | const u8 *data; |
| 731 | u8 *ptr; |
| 732 | u8 wrapped_data; |
| 733 | int ret; |
| 734 | |
| 735 | wpa_printf(MSG_DEBUG, "PASN: Building frame 3"); |
| 736 | |
| 737 | if (pasn->trans_seq != 2) |
| 738 | return NULL; |
| 739 | |
| 740 | buf = wpabuf_alloc(1500); |
| 741 | if (!buf) |
| 742 | goto fail; |
| 743 | |
| 744 | wrapped_data = wpas_pasn_get_wrapped_data_format(pasn); |
| 745 | |
| 746 | wpa_pasn_build_auth_header(buf, pasn->bssid, |
| 747 | wpa_s->own_addr, pasn->bssid, |
| 748 | pasn->trans_seq + 1, WLAN_STATUS_SUCCESS); |
| 749 | |
| 750 | wrapped_data_buf = wpas_pasn_get_wrapped_data(wpa_s); |
| 751 | |
| 752 | if (!wrapped_data_buf) |
| 753 | wrapped_data = WPA_PASN_WRAPPED_DATA_NO; |
| 754 | |
| 755 | wpa_pasn_add_parameter_ie(buf, pasn->group, wrapped_data, |
| 756 | NULL, NULL, -1); |
| 757 | |
| 758 | if (wpa_pasn_add_wrapped_data(buf, wrapped_data_buf) < 0) |
| 759 | goto fail; |
| 760 | wpabuf_free(wrapped_data_buf); |
| 761 | wrapped_data_buf = NULL; |
| 762 | |
| 763 | /* Add the MIC */ |
| 764 | mic_len = pasn_mic_len(pasn->akmp, pasn->cipher); |
| 765 | wpabuf_put_u8(buf, WLAN_EID_MIC); |
| 766 | wpabuf_put_u8(buf, mic_len); |
| 767 | ptr = wpabuf_put(buf, mic_len); |
| 768 | |
| 769 | os_memset(ptr, 0, mic_len); |
| 770 | |
| 771 | data = wpabuf_head_u8(buf) + IEEE80211_HDRLEN; |
| 772 | data_len = wpabuf_len(buf) - IEEE80211_HDRLEN; |
| 773 | |
| 774 | ret = pasn_mic(pasn->ptk.kck, pasn->akmp, pasn->cipher, |
| 775 | wpa_s->own_addr, pasn->bssid, |
| 776 | pasn->hash, mic_len * 2, data, data_len, mic); |
| 777 | if (ret) { |
| 778 | wpa_printf(MSG_DEBUG, "PASN: frame 3: Failed MIC calculation"); |
| 779 | goto fail; |
| 780 | } |
| 781 | |
| 782 | os_memcpy(ptr, mic, mic_len); |
| 783 | |
| 784 | pasn->trans_seq++; |
| 785 | |
| 786 | wpa_printf(MSG_DEBUG, "PASN: frame 3: Success"); |
| 787 | return buf; |
| 788 | fail: |
| 789 | pasn->status = WLAN_STATUS_UNSPECIFIED_FAILURE; |
| 790 | wpabuf_free(wrapped_data_buf); |
| 791 | wpabuf_free(buf); |
| 792 | return NULL; |
| 793 | } |
| 794 | |
| 795 | |
| 796 | static void wpas_pasn_reset(struct wpa_supplicant *wpa_s) |
| 797 | { |
| 798 | struct wpas_pasn *pasn = &wpa_s->pasn; |
| 799 | |
| 800 | wpa_printf(MSG_DEBUG, "PASN: Reset"); |
| 801 | |
| 802 | crypto_ecdh_deinit(pasn->ecdh); |
| 803 | pasn->ecdh = NULL; |
| 804 | |
| 805 | wpas_pasn_cancel_auth_work(wpa_s); |
| 806 | wpa_s->pasn_auth_work = NULL; |
| 807 | |
| 808 | eloop_cancel_timeout(wpas_pasn_auth_work_timeout, wpa_s, NULL); |
| 809 | |
| 810 | pasn->akmp = 0; |
| 811 | pasn->cipher = 0; |
| 812 | pasn->group = 0; |
| 813 | pasn->trans_seq = 0; |
| 814 | pasn->pmk_len = 0; |
| 815 | pasn->using_pmksa = false; |
| 816 | |
| 817 | forced_memzero(pasn->pmk, sizeof(pasn->pmk)); |
| 818 | forced_memzero(&pasn->ptk, sizeof(pasn->ptk)); |
| 819 | forced_memzero(&pasn->hash, sizeof(pasn->hash)); |
| 820 | |
| 821 | wpabuf_free(pasn->beacon_rsne_rsnxe); |
| 822 | pasn->beacon_rsne_rsnxe = NULL; |
| 823 | |
| 824 | #ifdef CONFIG_SAE |
| 825 | sae_clear_data(&pasn->sae); |
| 826 | #endif /* CONFIG_SAE */ |
| 827 | |
| 828 | #ifdef CONFIG_FILS |
| 829 | os_memset(&pasn->fils, 0, sizeof(pasn->fils)); |
| 830 | #endif /* CONFIG_FILS*/ |
| 831 | |
| 832 | #ifdef CONFIG_IEEE80211R |
| 833 | forced_memzero(pasn->pmk_r1, sizeof(pasn->pmk_r1)); |
| 834 | pasn->pmk_r1_len = 0; |
| 835 | os_memset(pasn->pmk_r1_name, 0, sizeof(pasn->pmk_r1_name)); |
| 836 | #endif /* CONFIG_IEEE80211R */ |
| 837 | pasn->status = WLAN_STATUS_UNSPECIFIED_FAILURE; |
| 838 | } |
| 839 | |
| 840 | |
| 841 | static int wpas_pasn_set_pmk(struct wpa_supplicant *wpa_s, |
| 842 | struct wpa_ie_data *rsn_data, |
| 843 | struct wpa_pasn_params_data *pasn_data, |
| 844 | struct wpabuf *wrapped_data) |
| 845 | { |
| 846 | static const u8 pasn_default_pmk[] = {'P', 'M', 'K', 'z'}; |
| 847 | struct wpas_pasn *pasn = &wpa_s->pasn; |
| 848 | |
| 849 | os_memset(pasn->pmk, 0, sizeof(pasn->pmk)); |
| 850 | pasn->pmk_len = 0; |
| 851 | |
| 852 | if (pasn->akmp == WPA_KEY_MGMT_PASN) { |
| 853 | wpa_printf(MSG_DEBUG, "PASN: Using default PMK"); |
| 854 | |
| 855 | pasn->pmk_len = WPA_PASN_PMK_LEN; |
| 856 | os_memcpy(pasn->pmk, pasn_default_pmk, |
| 857 | sizeof(pasn_default_pmk)); |
| 858 | return 0; |
| 859 | } |
| 860 | |
| 861 | if (wpa_key_mgmt_ft(pasn->akmp)) { |
| 862 | #ifdef CONFIG_IEEE80211R |
| 863 | wpa_printf(MSG_DEBUG, "PASN: FT: Using PMK-R1"); |
| 864 | pasn->pmk_len = pasn->pmk_r1_len; |
| 865 | os_memcpy(pasn->pmk, pasn->pmk_r1, pasn->pmk_r1_len); |
| 866 | pasn->using_pmksa = true; |
| 867 | return 0; |
| 868 | #else /* CONFIG_IEEE80211R */ |
| 869 | wpa_printf(MSG_DEBUG, "PASN: FT: Not supported"); |
| 870 | return -1; |
| 871 | #endif /* CONFIG_IEEE80211R */ |
| 872 | } |
| 873 | |
| 874 | if (rsn_data->num_pmkid) { |
| 875 | struct rsn_pmksa_cache_entry *pmksa; |
| 876 | |
| 877 | pmksa = wpa_sm_pmksa_cache_get(wpa_s->wpa, pasn->bssid, |
| 878 | rsn_data->pmkid, NULL, |
| 879 | pasn->akmp); |
| 880 | if (pmksa) { |
| 881 | wpa_printf(MSG_DEBUG, "PASN: Using PMKSA"); |
| 882 | |
| 883 | pasn->pmk_len = pmksa->pmk_len; |
| 884 | os_memcpy(pasn->pmk, pmksa->pmk, pmksa->pmk_len); |
| 885 | pasn->using_pmksa = true; |
| 886 | |
| 887 | return 0; |
| 888 | } |
| 889 | } |
| 890 | |
| 891 | #ifdef CONFIG_SAE |
| 892 | if (pasn->akmp == WPA_KEY_MGMT_SAE) { |
| 893 | int ret; |
| 894 | |
| 895 | ret = wpas_pasn_wd_sae_rx(wpa_s, wrapped_data); |
| 896 | if (ret) { |
| 897 | wpa_printf(MSG_DEBUG, |
| 898 | "PASN: Failed processing SAE wrapped data"); |
| 899 | pasn->status = WLAN_STATUS_UNSPECIFIED_FAILURE; |
| 900 | return -1; |
| 901 | } |
| 902 | |
| 903 | wpa_printf(MSG_DEBUG, "PASN: Success deriving PMK with SAE"); |
| 904 | pasn->pmk_len = PMK_LEN; |
| 905 | os_memcpy(pasn->pmk, pasn->sae.pmk, PMK_LEN); |
| 906 | |
| 907 | wpa_pasn_pmksa_cache_add(wpa_s->wpa, pasn->pmk, |
| 908 | pasn->pmk_len, pasn->sae.pmkid, |
| 909 | pasn->bssid, pasn->akmp); |
| 910 | return 0; |
| 911 | } |
| 912 | #endif /* CONFIG_SAE */ |
| 913 | |
| 914 | #ifdef CONFIG_FILS |
| 915 | if (pasn->akmp == WPA_KEY_MGMT_FILS_SHA256 || |
| 916 | pasn->akmp == WPA_KEY_MGMT_FILS_SHA384) { |
| 917 | int ret; |
| 918 | |
| 919 | ret = wpas_pasn_wd_fils_rx(wpa_s, wrapped_data); |
| 920 | if (ret) { |
| 921 | wpa_printf(MSG_DEBUG, |
| 922 | "PASN: Failed processing FILS wrapped data"); |
| 923 | pasn->status = WLAN_STATUS_UNSPECIFIED_FAILURE; |
| 924 | return -1; |
| 925 | } |
| 926 | |
| 927 | return 0; |
| 928 | } |
| 929 | #endif /* CONFIG_FILS */ |
| 930 | |
| 931 | /* TODO: Derive PMK based on wrapped data */ |
| 932 | wpa_printf(MSG_DEBUG, "PASN: Missing implementation to derive PMK"); |
| 933 | pasn->status = WLAN_STATUS_UNSPECIFIED_FAILURE; |
| 934 | return -1; |
| 935 | } |
| 936 | |
| 937 | |
| 938 | static int wpas_pasn_start(struct wpa_supplicant *wpa_s, const u8 *bssid, |
| 939 | int akmp, int cipher, u16 group, int freq, |
| 940 | const u8 *beacon_rsne, u8 beacon_rsne_len, |
| 941 | const u8 *beacon_rsnxe, u8 beacon_rsnxe_len, |
| 942 | int network_id) |
| 943 | { |
| 944 | struct wpas_pasn *pasn = &wpa_s->pasn; |
| 945 | struct wpa_ssid *ssid = NULL; |
| 946 | struct wpabuf *frame; |
| 947 | int ret; |
| 948 | |
| 949 | /* TODO: Currently support only ECC groups */ |
| 950 | if (!dragonfly_suitable_group(group, 1)) { |
| 951 | wpa_printf(MSG_DEBUG, |
| 952 | "PASN: Reject unsuitable group %u", group); |
| 953 | return -1; |
| 954 | } |
| 955 | |
| 956 | ssid = wpa_config_get_network(wpa_s->conf, network_id); |
| 957 | |
| 958 | switch (akmp) { |
| 959 | case WPA_KEY_MGMT_PASN: |
| 960 | break; |
| 961 | #ifdef CONFIG_SAE |
| 962 | case WPA_KEY_MGMT_SAE: |
| 963 | if (!ssid) { |
| 964 | wpa_printf(MSG_DEBUG, |
| 965 | "PASN: No network profile found for SAE"); |
| 966 | return -1; |
| 967 | } |
| 968 | pasn->sae.state = SAE_NOTHING; |
| 969 | pasn->sae.send_confirm = 0; |
| 970 | pasn->ssid = ssid; |
| 971 | break; |
| 972 | #endif /* CONFIG_SAE */ |
| 973 | #ifdef CONFIG_FILS |
| 974 | case WPA_KEY_MGMT_FILS_SHA256: |
| 975 | case WPA_KEY_MGMT_FILS_SHA384: |
| 976 | pasn->ssid = ssid; |
| 977 | break; |
| 978 | #endif /* CONFIG_FILS */ |
| 979 | #ifdef CONFIG_IEEE80211R |
| 980 | case WPA_KEY_MGMT_FT_PSK: |
| 981 | case WPA_KEY_MGMT_FT_IEEE8021X: |
| 982 | case WPA_KEY_MGMT_FT_IEEE8021X_SHA384: |
| 983 | break; |
| 984 | #endif /* CONFIG_IEEE80211R */ |
| 985 | default: |
| 986 | wpa_printf(MSG_ERROR, "PASN: Unsupported AKMP=0x%x", akmp); |
| 987 | return -1; |
| 988 | } |
| 989 | |
| 990 | pasn->ecdh = crypto_ecdh_init(group); |
| 991 | if (!pasn->ecdh) { |
| 992 | wpa_printf(MSG_DEBUG, "PASN: Failed to init ECDH"); |
| 993 | goto fail; |
| 994 | } |
| 995 | |
| 996 | pasn->beacon_rsne_rsnxe = wpabuf_alloc(beacon_rsne_len + |
| 997 | beacon_rsnxe_len); |
| 998 | if (!pasn->beacon_rsne_rsnxe) { |
| 999 | wpa_printf(MSG_DEBUG, "PASN: Failed storing beacon RSNE/RSNXE"); |
| 1000 | goto fail; |
| 1001 | } |
| 1002 | |
| 1003 | wpabuf_put_data(pasn->beacon_rsne_rsnxe, beacon_rsne, beacon_rsne_len); |
| 1004 | if (beacon_rsnxe && beacon_rsnxe_len) |
| 1005 | wpabuf_put_data(pasn->beacon_rsne_rsnxe, beacon_rsnxe, |
| 1006 | beacon_rsnxe_len); |
| 1007 | |
| 1008 | pasn->akmp = akmp; |
| 1009 | pasn->cipher = cipher; |
| 1010 | pasn->group = group; |
| 1011 | pasn->freq = freq; |
| 1012 | os_memcpy(pasn->bssid, bssid, ETH_ALEN); |
| 1013 | |
| 1014 | wpa_printf(MSG_DEBUG, |
| 1015 | "PASN: Init: " MACSTR " akmp=0x%x, cipher=0x%x, group=%u", |
| 1016 | MAC2STR(pasn->bssid), pasn->akmp, pasn->cipher, |
| 1017 | pasn->group); |
| 1018 | |
| 1019 | frame = wpas_pasn_build_auth_1(wpa_s); |
| 1020 | if (!frame) { |
| 1021 | wpa_printf(MSG_DEBUG, "PASN: Failed building 1st auth frame"); |
| 1022 | goto fail; |
| 1023 | } |
| 1024 | |
| 1025 | ret = wpa_drv_send_mlme(wpa_s, wpabuf_head(frame), wpabuf_len(frame), 0, |
| 1026 | pasn->freq, 1000); |
| 1027 | |
| 1028 | wpabuf_free(frame); |
| 1029 | if (ret) { |
| 1030 | wpa_printf(MSG_DEBUG, "PASN: Failed sending 1st auth frame"); |
| 1031 | goto fail; |
| 1032 | } |
| 1033 | |
| 1034 | eloop_register_timeout(2, 0, wpas_pasn_auth_work_timeout, wpa_s, NULL); |
| 1035 | return 0; |
| 1036 | |
| 1037 | fail: |
| 1038 | return -1; |
| 1039 | } |
| 1040 | |
| 1041 | |
| 1042 | static struct wpa_bss * wpas_pasn_allowed(struct wpa_supplicant *wpa_s, |
| 1043 | const u8 *bssid, int akmp, int cipher) |
| 1044 | { |
| 1045 | struct wpa_bss *bss; |
| 1046 | const u8 *rsne; |
| 1047 | struct wpa_ie_data rsne_data; |
| 1048 | int ret; |
| 1049 | |
| 1050 | if (os_memcmp(wpa_s->bssid, bssid, ETH_ALEN) == 0) { |
| 1051 | wpa_printf(MSG_DEBUG, |
| 1052 | "PASN: Not doing authentication with current BSS"); |
| 1053 | return NULL; |
| 1054 | } |
| 1055 | |
| 1056 | bss = wpa_bss_get_bssid(wpa_s, bssid); |
| 1057 | if (!bss) { |
| 1058 | wpa_printf(MSG_DEBUG, "PASN: BSS not found"); |
| 1059 | return NULL; |
| 1060 | } |
| 1061 | |
| 1062 | rsne = wpa_bss_get_ie(bss, WLAN_EID_RSN); |
| 1063 | if (!rsne) { |
| 1064 | wpa_printf(MSG_DEBUG, "PASN: BSS without RSNE"); |
| 1065 | return NULL; |
| 1066 | } |
| 1067 | |
| 1068 | ret = wpa_parse_wpa_ie(rsne, *(rsne + 1) + 2, &rsne_data); |
| 1069 | if (ret) { |
| 1070 | wpa_printf(MSG_DEBUG, "PASN: Failed parsing RSNE data"); |
| 1071 | return NULL; |
| 1072 | } |
| 1073 | |
| 1074 | if (!(rsne_data.key_mgmt & akmp) || |
| 1075 | !(rsne_data.pairwise_cipher & cipher)) { |
| 1076 | wpa_printf(MSG_DEBUG, |
| 1077 | "PASN: AP does not support requested AKMP or cipher"); |
| 1078 | return NULL; |
| 1079 | } |
| 1080 | |
| 1081 | return bss; |
| 1082 | } |
| 1083 | |
| 1084 | |
| 1085 | static void wpas_pasn_auth_start_cb(struct wpa_radio_work *work, int deinit) |
| 1086 | { |
| 1087 | struct wpa_supplicant *wpa_s = work->wpa_s; |
| 1088 | struct wpa_pasn_auth_work *awork = work->ctx; |
| 1089 | struct wpa_bss *bss; |
| 1090 | const u8 *rsne, *rsnxe; |
| 1091 | int ret; |
| 1092 | |
| 1093 | wpa_printf(MSG_DEBUG, "PASN: auth_start_cb: deinit=%d", deinit); |
| 1094 | |
| 1095 | if (deinit) { |
| 1096 | if (work->started) { |
| 1097 | eloop_cancel_timeout(wpas_pasn_auth_work_timeout, |
| 1098 | wpa_s, NULL); |
| 1099 | wpa_s->pasn_auth_work = NULL; |
| 1100 | } |
| 1101 | os_free(awork); |
| 1102 | return; |
| 1103 | } |
| 1104 | |
| 1105 | /* |
| 1106 | * It is possible that by the time the callback is called, the PASN |
| 1107 | * authentication is not allowed, e.g., a connection with the AP was |
| 1108 | * established. |
| 1109 | */ |
| 1110 | bss = wpas_pasn_allowed(wpa_s, awork->bssid, awork->akmp, |
| 1111 | awork->cipher); |
| 1112 | if (!bss) { |
| 1113 | wpa_printf(MSG_DEBUG, "PASN: auth_start_cb: Not allowed"); |
| 1114 | goto fail; |
| 1115 | } |
| 1116 | |
| 1117 | rsne = wpa_bss_get_ie(bss, WLAN_EID_RSN); |
| 1118 | if (!rsne) { |
| 1119 | wpa_printf(MSG_DEBUG, "PASN: BSS without RSNE"); |
| 1120 | goto fail; |
| 1121 | } |
| 1122 | |
| 1123 | rsnxe = wpa_bss_get_ie(bss, WLAN_EID_RSNX); |
| 1124 | |
| 1125 | ret = wpas_pasn_start(wpa_s, awork->bssid, awork->akmp, awork->cipher, |
| 1126 | awork->group, bss->freq, rsne, *(rsne + 1) + 2, |
| 1127 | rsnxe, rsnxe ? *(rsnxe + 1) + 2 : 0, |
| 1128 | awork->network_id); |
| 1129 | if (ret) { |
| 1130 | wpa_printf(MSG_DEBUG, |
| 1131 | "PASN: Failed to start PASN authentication"); |
| 1132 | goto fail; |
| 1133 | } |
| 1134 | |
| 1135 | wpa_s->pasn_auth_work = work; |
| 1136 | return; |
| 1137 | fail: |
| 1138 | os_free(awork); |
| 1139 | work->ctx = NULL; |
| 1140 | radio_work_done(work); |
| 1141 | } |
| 1142 | |
| 1143 | |
| 1144 | int wpas_pasn_auth_start(struct wpa_supplicant *wpa_s, const u8 *bssid, |
| 1145 | int akmp, int cipher, u16 group, int network_id) |
| 1146 | { |
| 1147 | struct wpa_pasn_auth_work *awork; |
| 1148 | struct wpa_bss *bss; |
| 1149 | |
| 1150 | wpa_printf(MSG_DEBUG, "PASN: Start: " MACSTR " akmp=0x%x, cipher=0x%x", |
| 1151 | MAC2STR(bssid), akmp, cipher); |
| 1152 | |
| 1153 | /* |
| 1154 | * TODO: Consider modifying the offchannel logic to handle additional |
| 1155 | * Management frames other then Action frames. For now allow PASN only |
| 1156 | * with drivers that support off-channel TX. |
| 1157 | */ |
| 1158 | if (!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_OFFCHANNEL_TX)) { |
| 1159 | wpa_printf(MSG_DEBUG, |
| 1160 | "PASN: Driver does not support offchannel TX"); |
| 1161 | return -1; |
| 1162 | } |
| 1163 | |
| 1164 | if (radio_work_pending(wpa_s, "pasn-start-auth")) { |
| 1165 | wpa_printf(MSG_DEBUG, |
| 1166 | "PASN: send_auth: Work is already pending"); |
| 1167 | return -1; |
| 1168 | } |
| 1169 | |
| 1170 | if (wpa_s->pasn_auth_work) { |
| 1171 | wpa_printf(MSG_DEBUG, "PASN: send_auth: Already in progress"); |
| 1172 | return -1; |
| 1173 | } |
| 1174 | |
| 1175 | bss = wpas_pasn_allowed(wpa_s, bssid, akmp, cipher); |
| 1176 | if (!bss) |
| 1177 | return -1; |
| 1178 | |
| 1179 | wpas_pasn_reset(wpa_s); |
| 1180 | |
| 1181 | awork = os_zalloc(sizeof(*awork)); |
| 1182 | if (!awork) |
| 1183 | return -1; |
| 1184 | |
| 1185 | os_memcpy(awork->bssid, bssid, ETH_ALEN); |
| 1186 | awork->akmp = akmp; |
| 1187 | awork->cipher = cipher; |
| 1188 | awork->group = group; |
| 1189 | awork->network_id = network_id; |
| 1190 | |
| 1191 | if (radio_add_work(wpa_s, bss->freq, "pasn-start-auth", 1, |
| 1192 | wpas_pasn_auth_start_cb, awork) < 0) { |
| 1193 | os_free(awork); |
| 1194 | return -1; |
| 1195 | } |
| 1196 | |
| 1197 | wpa_printf(MSG_DEBUG, "PASN: Auth work successfully added"); |
| 1198 | return 0; |
| 1199 | } |
| 1200 | |
| 1201 | |
| 1202 | void wpas_pasn_auth_stop(struct wpa_supplicant *wpa_s) |
| 1203 | { |
| 1204 | struct wpas_pasn *pasn = &wpa_s->pasn; |
| 1205 | |
| 1206 | if (!wpa_s->pasn.ecdh) |
| 1207 | return; |
| 1208 | |
| 1209 | wpa_printf(MSG_DEBUG, "PASN: Stopping authentication"); |
| 1210 | |
| 1211 | wpas_pasn_auth_status(wpa_s, pasn->bssid, pasn->akmp, pasn->cipher, |
| 1212 | pasn->status); |
| 1213 | |
| 1214 | wpas_pasn_reset(wpa_s); |
| 1215 | } |
| 1216 | |
| 1217 | |
| 1218 | int wpas_pasn_auth_rx(struct wpa_supplicant *wpa_s, |
| 1219 | const struct ieee80211_mgmt *mgmt, size_t len) |
| 1220 | { |
| 1221 | struct wpas_pasn *pasn = &wpa_s->pasn; |
| 1222 | struct ieee802_11_elems elems; |
| 1223 | struct wpa_ie_data rsn_data; |
| 1224 | struct wpa_pasn_params_data pasn_params; |
| 1225 | struct wpabuf *wrapped_data = NULL, *secret = NULL, *frame = NULL; |
| 1226 | u8 mic[WPA_PASN_MAX_MIC_LEN], out_mic[WPA_PASN_MAX_MIC_LEN]; |
| 1227 | u8 mic_len; |
| 1228 | u16 status; |
| 1229 | int ret; |
| 1230 | u16 fc = host_to_le16((WLAN_FC_TYPE_MGMT << 2) | |
| 1231 | (WLAN_FC_STYPE_AUTH << 4)); |
| 1232 | |
| 1233 | if (!wpa_s->pasn_auth_work || !mgmt || |
| 1234 | len < offsetof(struct ieee80211_mgmt, u.auth.variable)) |
| 1235 | return -2; |
| 1236 | |
| 1237 | /* Not an Authentication frame; do nothing */ |
| 1238 | if ((mgmt->frame_control & fc) != fc) |
| 1239 | return -2; |
| 1240 | |
| 1241 | /* Not our frame; do nothing */ |
| 1242 | if (os_memcmp(mgmt->da, wpa_s->own_addr, ETH_ALEN) != 0 || |
| 1243 | os_memcmp(mgmt->sa, pasn->bssid, ETH_ALEN) != 0 || |
| 1244 | os_memcmp(mgmt->bssid, pasn->bssid, ETH_ALEN) != 0) |
| 1245 | return -2; |
| 1246 | |
| 1247 | /* Not PASN; do nothing */ |
| 1248 | if (mgmt->u.auth.auth_alg != host_to_le16(WLAN_AUTH_PASN)) |
| 1249 | return -2; |
| 1250 | |
| 1251 | if (mgmt->u.auth.auth_transaction != |
| 1252 | host_to_le16(pasn->trans_seq + 1)) { |
| 1253 | wpa_printf(MSG_DEBUG, |
| 1254 | "PASN: RX: Invalid transaction sequence: (%u != %u)", |
| 1255 | le_to_host16(mgmt->u.auth.auth_transaction), |
| 1256 | pasn->trans_seq + 1); |
| 1257 | return -1; |
| 1258 | } |
| 1259 | |
| 1260 | status = le_to_host16(mgmt->u.auth.status_code); |
| 1261 | |
| 1262 | if (status != WLAN_STATUS_SUCCESS && |
| 1263 | status != WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY) { |
| 1264 | wpa_printf(MSG_DEBUG, |
| 1265 | "PASN: Authentication rejected - status=%u", status); |
| 1266 | pasn->status = status; |
| 1267 | wpas_pasn_auth_stop(wpa_s); |
| 1268 | return -1; |
| 1269 | } |
| 1270 | |
| 1271 | if (ieee802_11_parse_elems(mgmt->u.auth.variable, |
| 1272 | len - offsetof(struct ieee80211_mgmt, |
| 1273 | u.auth.variable), |
| 1274 | &elems, 0) == ParseFailed) { |
| 1275 | wpa_printf(MSG_DEBUG, |
| 1276 | "PASN: Failed parsing Authentication frame"); |
| 1277 | goto fail; |
| 1278 | } |
| 1279 | |
| 1280 | /* Check that the MIC IE exists. Save it and zero out the memory */ |
| 1281 | mic_len = pasn_mic_len(pasn->akmp, pasn->cipher); |
| 1282 | if (status == WLAN_STATUS_SUCCESS) { |
| 1283 | if (!elems.mic || elems.mic_len != mic_len) { |
| 1284 | wpa_printf(MSG_DEBUG, |
| 1285 | "PASN: Invalid MIC. Expecting len=%u", |
| 1286 | mic_len); |
| 1287 | goto fail; |
| 1288 | } else { |
| 1289 | os_memcpy(mic, elems.mic, mic_len); |
| 1290 | /* TODO: Clean this up.. Should not be modifying the |
| 1291 | * received message buffer. */ |
| 1292 | os_memset((u8 *) elems.mic, 0, mic_len); |
| 1293 | } |
| 1294 | } |
| 1295 | |
| 1296 | if (!elems.pasn_params || !elems.pasn_params_len) { |
| 1297 | wpa_printf(MSG_DEBUG, |
| 1298 | "PASN: Missing PASN Parameters IE"); |
| 1299 | goto fail; |
| 1300 | } |
| 1301 | |
| 1302 | ret = wpa_pasn_parse_parameter_ie(elems.pasn_params - 3, |
| 1303 | elems.pasn_params_len + 3, |
| 1304 | true, &pasn_params); |
| 1305 | if (ret) { |
| 1306 | wpa_printf(MSG_DEBUG, |
| 1307 | "PASN: Failed validation PASN of Parameters IE"); |
| 1308 | goto fail; |
| 1309 | } |
| 1310 | |
| 1311 | /* TODO: handle comeback flow */ |
| 1312 | if (status == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY) { |
| 1313 | wpa_printf(MSG_DEBUG, |
| 1314 | "PASN: Authentication temporarily rejected"); |
| 1315 | goto fail; |
| 1316 | } |
| 1317 | |
| 1318 | ret = wpa_parse_wpa_ie(elems.rsn_ie - 2, elems.rsn_ie_len + 2, |
| 1319 | &rsn_data); |
| 1320 | if (ret) { |
| 1321 | wpa_printf(MSG_DEBUG, "PASN: Failed parsing RNSE"); |
| 1322 | goto fail; |
| 1323 | } |
| 1324 | |
| 1325 | ret = wpa_pasn_validate_rsne(&rsn_data); |
| 1326 | if (ret) { |
| 1327 | wpa_printf(MSG_DEBUG, "PASN: Failed validating RSNE"); |
| 1328 | goto fail; |
| 1329 | } |
| 1330 | |
| 1331 | if (pasn->akmp != rsn_data.key_mgmt || |
| 1332 | pasn->cipher != rsn_data.pairwise_cipher) { |
| 1333 | wpa_printf(MSG_DEBUG, "PASN: Mismatch in AKMP/cipher"); |
| 1334 | goto fail; |
| 1335 | } |
| 1336 | |
| 1337 | if (pasn->group != pasn_params.group) { |
| 1338 | wpa_printf(MSG_DEBUG, "PASN: Mismatch in group"); |
| 1339 | goto fail; |
| 1340 | } |
| 1341 | |
| 1342 | if (!pasn_params.pubkey || !pasn_params.pubkey_len) { |
| 1343 | wpa_printf(MSG_DEBUG, "PASN: Invalid public key"); |
| 1344 | goto fail; |
| 1345 | } |
| 1346 | |
| 1347 | secret = crypto_ecdh_set_peerkey(pasn->ecdh, 0, |
| 1348 | pasn_params.pubkey, |
| 1349 | pasn_params.pubkey_len); |
| 1350 | |
| 1351 | if (!secret) { |
| 1352 | wpa_printf(MSG_DEBUG, "PASN: Failed to derive shared secret"); |
| 1353 | goto fail; |
| 1354 | } |
| 1355 | |
| 1356 | if (pasn_params.wrapped_data_format != WPA_PASN_WRAPPED_DATA_NO) { |
| 1357 | wrapped_data = ieee802_11_defrag(&elems, |
| 1358 | WLAN_EID_EXTENSION, |
| 1359 | WLAN_EID_EXT_WRAPPED_DATA); |
| 1360 | |
| 1361 | if (!wrapped_data) { |
| 1362 | wpa_printf(MSG_DEBUG, "PASN: Missing wrapped data"); |
| 1363 | goto fail; |
| 1364 | } |
| 1365 | } |
| 1366 | |
| 1367 | ret = wpas_pasn_set_pmk(wpa_s, &rsn_data, &pasn_params, wrapped_data); |
| 1368 | if (ret) { |
| 1369 | wpa_printf(MSG_DEBUG, "PASN: Failed to set PMK"); |
| 1370 | goto fail; |
| 1371 | } |
| 1372 | |
| 1373 | ret = pasn_pmk_to_ptk(pasn->pmk, pasn->pmk_len, |
| 1374 | wpa_s->own_addr, pasn->bssid, |
| 1375 | wpabuf_head(secret), wpabuf_len(secret), |
| 1376 | &pasn->ptk, pasn->akmp, pasn->cipher, |
| 1377 | WPA_KDK_MAX_LEN); |
| 1378 | if (ret) { |
| 1379 | wpa_printf(MSG_DEBUG, "PASN: Failed to derive PTK"); |
| 1380 | goto fail; |
| 1381 | } |
| 1382 | |
| 1383 | wpabuf_free(wrapped_data); |
| 1384 | wrapped_data = NULL; |
| 1385 | wpabuf_free(secret); |
| 1386 | secret = NULL; |
| 1387 | |
| 1388 | /* Verify the MIC */ |
| 1389 | ret = pasn_mic(pasn->ptk.kck, pasn->akmp, pasn->cipher, |
| 1390 | pasn->bssid, wpa_s->own_addr, |
| 1391 | wpabuf_head(pasn->beacon_rsne_rsnxe), |
| 1392 | wpabuf_len(pasn->beacon_rsne_rsnxe), |
| 1393 | (u8 *) &mgmt->u.auth, |
| 1394 | len - offsetof(struct ieee80211_mgmt, u.auth), |
| 1395 | out_mic); |
| 1396 | |
| 1397 | wpa_hexdump_key(MSG_DEBUG, "PASN: Frame MIC", mic, mic_len); |
| 1398 | if (ret || os_memcmp(mic, out_mic, mic_len) != 0) { |
| 1399 | wpa_printf(MSG_DEBUG, "PASN: Failed MIC verification"); |
| 1400 | goto fail; |
| 1401 | } |
| 1402 | |
| 1403 | pasn->trans_seq++; |
| 1404 | |
| 1405 | wpa_printf(MSG_DEBUG, "PASN: Success verifying Authentication frame"); |
| 1406 | |
| 1407 | frame = wpas_pasn_build_auth_3(wpa_s); |
| 1408 | if (!frame) { |
| 1409 | wpa_printf(MSG_DEBUG, "PASN: Failed building 3rd auth frame"); |
| 1410 | goto fail; |
| 1411 | } |
| 1412 | |
| 1413 | ret = wpa_drv_send_mlme(wpa_s, wpabuf_head(frame), wpabuf_len(frame), 0, |
| 1414 | pasn->freq, 100); |
| 1415 | wpabuf_free(frame); |
| 1416 | if (ret) { |
| 1417 | wpa_printf(MSG_DEBUG, "PASN: Failed sending 3st auth frame"); |
| 1418 | goto fail; |
| 1419 | } |
| 1420 | |
| 1421 | wpa_printf(MSG_DEBUG, "PASN: Success sending last frame. Store PTK"); |
| 1422 | |
| 1423 | ptksa_cache_add(wpa_s->ptksa, pasn->bssid, pasn->cipher, |
| 1424 | dot11RSNAConfigPMKLifetime, &pasn->ptk); |
| 1425 | |
| 1426 | forced_memzero(&pasn->ptk, sizeof(pasn->ptk)); |
| 1427 | |
| 1428 | pasn->status = WLAN_STATUS_SUCCESS; |
| 1429 | return 0; |
| 1430 | fail: |
| 1431 | wpa_printf(MSG_DEBUG, "PASN: Failed RX processing - terminating"); |
| 1432 | wpabuf_free(wrapped_data); |
| 1433 | wpabuf_free(secret); |
| 1434 | |
| 1435 | /* |
| 1436 | * TODO: In case of an error the standard allows to silently drop |
| 1437 | * the frame and terminate the authentication exchange. However, better |
| 1438 | * reply to the AP with an error status. |
| 1439 | */ |
| 1440 | pasn->status = WLAN_STATUS_UNSPECIFIED_FAILURE; |
| 1441 | wpas_pasn_auth_stop(wpa_s); |
| 1442 | return -1; |
| 1443 | } |
| 1444 | |
| 1445 | |
| 1446 | int wpas_pasn_auth_tx_status(struct wpa_supplicant *wpa_s, |
| 1447 | const u8 *data, size_t data_len, u8 acked) |
| 1448 | |
| 1449 | { |
| 1450 | struct wpas_pasn *pasn = &wpa_s->pasn; |
| 1451 | const struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) data; |
| 1452 | u16 fc = host_to_le16((WLAN_FC_TYPE_MGMT << 2) | |
| 1453 | (WLAN_FC_STYPE_AUTH << 4)); |
| 1454 | |
| 1455 | wpa_printf(MSG_DEBUG, "PASN: auth_tx_status: acked=%u", acked); |
| 1456 | |
| 1457 | if (!wpa_s->pasn_auth_work) { |
| 1458 | wpa_printf(MSG_DEBUG, |
| 1459 | "PASN: auth_tx_status: no work in progress"); |
| 1460 | return -1; |
| 1461 | } |
| 1462 | |
| 1463 | if (!mgmt || |
| 1464 | data_len < offsetof(struct ieee80211_mgmt, u.auth.variable)) |
| 1465 | return -1; |
| 1466 | |
| 1467 | /* Not an authentication frame; do nothing */ |
| 1468 | if ((mgmt->frame_control & fc) != fc) |
| 1469 | return -1; |
| 1470 | |
| 1471 | /* Not our frame; do nothing */ |
| 1472 | if (os_memcmp(mgmt->da, pasn->bssid, ETH_ALEN) || |
| 1473 | os_memcmp(mgmt->sa, wpa_s->own_addr, ETH_ALEN) || |
| 1474 | os_memcmp(mgmt->bssid, pasn->bssid, ETH_ALEN)) |
| 1475 | return -1; |
| 1476 | |
| 1477 | /* Not PASN; do nothing */ |
| 1478 | if (mgmt->u.auth.auth_alg != host_to_le16(WLAN_AUTH_PASN)) |
| 1479 | return -1; |
| 1480 | |
| 1481 | if (mgmt->u.auth.auth_transaction != host_to_le16(pasn->trans_seq)) { |
| 1482 | wpa_printf(MSG_ERROR, |
| 1483 | "PASN: Invalid transaction sequence: (%u != %u)", |
| 1484 | pasn->trans_seq, |
| 1485 | le_to_host16(mgmt->u.auth.auth_transaction)); |
| 1486 | return 0; |
| 1487 | } |
| 1488 | |
| 1489 | wpa_printf(MSG_ERROR, |
| 1490 | "PASN: auth with trans_seq=%u, acked=%u", pasn->trans_seq, |
| 1491 | acked); |
| 1492 | |
| 1493 | /* |
| 1494 | * Even if the frame was not acked, do not treat this is an error, and |
| 1495 | * try to complete the flow, relying on the PASN timeout callback to |
| 1496 | * clean up. |
| 1497 | */ |
| 1498 | if (pasn->trans_seq == 3) { |
| 1499 | wpa_printf(MSG_DEBUG, "PASN: auth complete with: " MACSTR, |
| 1500 | MAC2STR(pasn->bssid)); |
| 1501 | /* |
| 1502 | * Either frame was not ACKed or it was ACKed but the trans_seq |
| 1503 | * != 1, i.e., not expecting an RX frame, so we are done. |
| 1504 | */ |
| 1505 | wpas_pasn_auth_stop(wpa_s); |
| 1506 | } |
| 1507 | |
| 1508 | return 0; |
| 1509 | } |