1 /* 2 * RADIUS authentication server 3 * Copyright (c) 2005-2009, 2011-2019, 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 "includes.h" 10 #include <net/if.h> 11 #ifdef CONFIG_SQLITE 12 #include <sqlite3.h> 13 #endif /* CONFIG_SQLITE */ 14 15 #include "common.h" 16 #include "radius.h" 17 #include "eloop.h" 18 #include "eap_server/eap.h" 19 #include "ap/ap_config.h" 20 #include "crypto/tls.h" 21 #include "radius_server.h" 22 23 /** 24 * RADIUS_SESSION_TIMEOUT - Session timeout in seconds 25 */ 26 #define RADIUS_SESSION_TIMEOUT 60 27 28 /** 29 * RADIUS_SESSION_MAINTAIN - Completed session expiration timeout in seconds 30 */ 31 #define RADIUS_SESSION_MAINTAIN 5 32 33 /** 34 * RADIUS_MAX_SESSION - Maximum number of active sessions 35 */ 36 #define RADIUS_MAX_SESSION 1000 37 38 /** 39 * RADIUS_MAX_MSG_LEN - Maximum message length for incoming RADIUS messages 40 */ 41 #define RADIUS_MAX_MSG_LEN 3000 42 43 static const struct eapol_callbacks radius_server_eapol_cb; 44 45 struct radius_client; 46 struct radius_server_data; 47 48 /** 49 * struct radius_server_counters - RADIUS server statistics counters 50 */ 51 struct radius_server_counters { 52 u32 access_requests; 53 u32 invalid_requests; 54 u32 dup_access_requests; 55 u32 access_accepts; 56 u32 access_rejects; 57 u32 access_challenges; 58 u32 malformed_access_requests; 59 u32 bad_authenticators; 60 u32 packets_dropped; 61 u32 unknown_types; 62 63 u32 acct_requests; 64 u32 invalid_acct_requests; 65 u32 acct_responses; 66 u32 malformed_acct_requests; 67 u32 acct_bad_authenticators; 68 u32 unknown_acct_types; 69 }; 70 71 /** 72 * struct radius_session - Internal RADIUS server data for a session 73 */ 74 struct radius_session { 75 struct radius_session *next; 76 struct radius_client *client; 77 struct radius_server_data *server; 78 unsigned int sess_id; 79 struct eap_sm *eap; 80 struct eap_eapol_interface *eap_if; 81 char *username; /* from User-Name attribute */ 82 char *nas_ip; 83 u8 mac_addr[ETH_ALEN]; /* from Calling-Station-Id attribute */ 84 85 struct radius_msg *last_msg; 86 char *last_from_addr; 87 int last_from_port; 88 struct sockaddr_storage last_from; 89 socklen_t last_fromlen; 90 u8 last_identifier; 91 struct radius_msg *last_reply; 92 u8 last_authenticator[16]; 93 94 unsigned int remediation:1; 95 unsigned int macacl:1; 96 unsigned int t_c_filtering:1; 97 98 struct hostapd_radius_attr *accept_attr; 99 100 u32 t_c_timestamp; /* Last read T&C timestamp from user DB */ 101 }; 102 103 /** 104 * struct radius_client - Internal RADIUS server data for a client 105 */ 106 struct radius_client { 107 struct radius_client *next; 108 struct in_addr addr; 109 struct in_addr mask; 110 #ifdef CONFIG_IPV6 111 struct in6_addr addr6; 112 struct in6_addr mask6; 113 #endif /* CONFIG_IPV6 */ 114 char *shared_secret; 115 int shared_secret_len; 116 struct radius_session *sessions; 117 struct radius_server_counters counters; 118 119 u8 next_dac_identifier; 120 struct radius_msg *pending_dac_coa_req; 121 u8 pending_dac_coa_id; 122 u8 pending_dac_coa_addr[ETH_ALEN]; 123 struct radius_msg *pending_dac_disconnect_req; 124 u8 pending_dac_disconnect_id; 125 u8 pending_dac_disconnect_addr[ETH_ALEN]; 126 }; 127 128 /** 129 * struct radius_server_data - Internal RADIUS server data 130 */ 131 struct radius_server_data { 132 /** 133 * auth_sock - Socket for RADIUS authentication messages 134 */ 135 int auth_sock; 136 137 /** 138 * acct_sock - Socket for RADIUS accounting messages 139 */ 140 int acct_sock; 141 142 /** 143 * clients - List of authorized RADIUS clients 144 */ 145 struct radius_client *clients; 146 147 /** 148 * next_sess_id - Next session identifier 149 */ 150 unsigned int next_sess_id; 151 152 /** 153 * conf_ctx - Context pointer for callbacks 154 * 155 * This is used as the ctx argument in get_eap_user() calls. 156 */ 157 void *conf_ctx; 158 159 /** 160 * num_sess - Number of active sessions 161 */ 162 int num_sess; 163 164 /** 165 * eap_sim_db_priv - EAP-SIM/AKA database context 166 * 167 * This is passed to the EAP-SIM/AKA server implementation as a 168 * callback context. 169 */ 170 void *eap_sim_db_priv; 171 172 /** 173 * ssl_ctx - TLS context 174 * 175 * This is passed to the EAP server implementation as a callback 176 * context for TLS operations. 177 */ 178 void *ssl_ctx; 179 180 /** 181 * pac_opaque_encr_key - PAC-Opaque encryption key for EAP-FAST 182 * 183 * This parameter is used to set a key for EAP-FAST to encrypt the 184 * PAC-Opaque data. It can be set to %NULL if EAP-FAST is not used. If 185 * set, must point to a 16-octet key. 186 */ 187 u8 *pac_opaque_encr_key; 188 189 /** 190 * eap_fast_a_id - EAP-FAST authority identity (A-ID) 191 * 192 * If EAP-FAST is not used, this can be set to %NULL. In theory, this 193 * is a variable length field, but due to some existing implementations 194 * requiring A-ID to be 16 octets in length, it is recommended to use 195 * that length for the field to provide interoperability with deployed 196 * peer implementations. 197 */ 198 u8 *eap_fast_a_id; 199 200 /** 201 * eap_fast_a_id_len - Length of eap_fast_a_id buffer in octets 202 */ 203 size_t eap_fast_a_id_len; 204 205 /** 206 * eap_fast_a_id_info - EAP-FAST authority identifier information 207 * 208 * This A-ID-Info contains a user-friendly name for the A-ID. For 209 * example, this could be the enterprise and server names in 210 * human-readable format. This field is encoded as UTF-8. If EAP-FAST 211 * is not used, this can be set to %NULL. 212 */ 213 char *eap_fast_a_id_info; 214 215 /** 216 * eap_fast_prov - EAP-FAST provisioning modes 217 * 218 * 0 = provisioning disabled, 1 = only anonymous provisioning allowed, 219 * 2 = only authenticated provisioning allowed, 3 = both provisioning 220 * modes allowed. 221 */ 222 int eap_fast_prov; 223 224 /** 225 * pac_key_lifetime - EAP-FAST PAC-Key lifetime in seconds 226 * 227 * This is the hard limit on how long a provisioned PAC-Key can be 228 * used. 229 */ 230 int pac_key_lifetime; 231 232 /** 233 * pac_key_refresh_time - EAP-FAST PAC-Key refresh time in seconds 234 * 235 * This is a soft limit on the PAC-Key. The server will automatically 236 * generate a new PAC-Key when this number of seconds (or fewer) of the 237 * lifetime remains. 238 */ 239 int pac_key_refresh_time; 240 241 int eap_teap_auth; 242 int eap_teap_pac_no_inner; 243 244 /** 245 * eap_sim_aka_result_ind - EAP-SIM/AKA protected success indication 246 * 247 * This controls whether the protected success/failure indication 248 * (AT_RESULT_IND) is used with EAP-SIM and EAP-AKA. 249 */ 250 int eap_sim_aka_result_ind; 251 252 int eap_sim_id; 253 254 /** 255 * tnc - Trusted Network Connect (TNC) 256 * 257 * This controls whether TNC is enabled and will be required before the 258 * peer is allowed to connect. Note: This is only used with EAP-TTLS 259 * and EAP-FAST. If any other EAP method is enabled, the peer will be 260 * allowed to connect without TNC. 261 */ 262 int tnc; 263 264 /** 265 * pwd_group - The D-H group assigned for EAP-pwd 266 * 267 * If EAP-pwd is not used it can be set to zero. 268 */ 269 u16 pwd_group; 270 271 /** 272 * server_id - Server identity 273 */ 274 const char *server_id; 275 276 /** 277 * erp - Whether EAP Re-authentication Protocol (ERP) is enabled 278 * 279 * This controls whether the authentication server derives ERP key 280 * hierarchy (rRK and rIK) from full EAP authentication and allows 281 * these keys to be used to perform ERP to derive rMSK instead of full 282 * EAP authentication to derive MSK. 283 */ 284 int erp; 285 286 const char *erp_domain; 287 288 struct dl_list erp_keys; /* struct eap_server_erp_key */ 289 290 unsigned int tls_session_lifetime; 291 292 unsigned int tls_flags; 293 294 /** 295 * wps - Wi-Fi Protected Setup context 296 * 297 * If WPS is used with an external RADIUS server (which is quite 298 * unlikely configuration), this is used to provide a pointer to WPS 299 * context data. Normally, this can be set to %NULL. 300 */ 301 struct wps_context *wps; 302 303 /** 304 * ipv6 - Whether to enable IPv6 support in the RADIUS server 305 */ 306 int ipv6; 307 308 /** 309 * start_time - Timestamp of server start 310 */ 311 struct os_reltime start_time; 312 313 /** 314 * counters - Statistics counters for server operations 315 * 316 * These counters are the sum over all clients. 317 */ 318 struct radius_server_counters counters; 319 320 /** 321 * get_eap_user - Callback for fetching EAP user information 322 * @ctx: Context data from conf_ctx 323 * @identity: User identity 324 * @identity_len: identity buffer length in octets 325 * @phase2: Whether this is for Phase 2 identity 326 * @user: Data structure for filling in the user information 327 * Returns: 0 on success, -1 on failure 328 * 329 * This is used to fetch information from user database. The callback 330 * will fill in information about allowed EAP methods and the user 331 * password. The password field will be an allocated copy of the 332 * password data and RADIUS server will free it after use. 333 */ 334 int (*get_eap_user)(void *ctx, const u8 *identity, size_t identity_len, 335 int phase2, struct eap_user *user); 336 337 /** 338 * eap_req_id_text - Optional data for EAP-Request/Identity 339 * 340 * This can be used to configure an optional, displayable message that 341 * will be sent in EAP-Request/Identity. This string can contain an 342 * ASCII-0 character (nul) to separate network infromation per RFC 343 * 4284. The actual string length is explicit provided in 344 * eap_req_id_text_len since nul character will not be used as a string 345 * terminator. 346 */ 347 char *eap_req_id_text; 348 349 /** 350 * eap_req_id_text_len - Length of eap_req_id_text buffer in octets 351 */ 352 size_t eap_req_id_text_len; 353 354 /* 355 * msg_ctx - Context data for wpa_msg() calls 356 */ 357 void *msg_ctx; 358 359 #ifdef CONFIG_RADIUS_TEST 360 char *dump_msk_file; 361 #endif /* CONFIG_RADIUS_TEST */ 362 363 char *subscr_remediation_url; 364 u8 subscr_remediation_method; 365 char *hs20_sim_provisioning_url; 366 367 char *t_c_server_url; 368 369 #ifdef CONFIG_SQLITE 370 sqlite3 *db; 371 #endif /* CONFIG_SQLITE */ 372 }; 373 374 375 #define RADIUS_DEBUG(args...) \ 376 wpa_printf(MSG_DEBUG, "RADIUS SRV: " args) 377 #define RADIUS_ERROR(args...) \ 378 wpa_printf(MSG_ERROR, "RADIUS SRV: " args) 379 #define RADIUS_DUMP(args...) \ 380 wpa_hexdump(MSG_MSGDUMP, "RADIUS SRV: " args) 381 #define RADIUS_DUMP_ASCII(args...) \ 382 wpa_hexdump_ascii(MSG_MSGDUMP, "RADIUS SRV: " args) 383 384 385 static void radius_server_session_timeout(void *eloop_ctx, void *timeout_ctx); 386 static void radius_server_session_remove_timeout(void *eloop_ctx, 387 void *timeout_ctx); 388 389 #ifdef CONFIG_SQLITE 390 #ifdef CONFIG_HS20 391 392 static int db_table_exists(sqlite3 *db, const char *name) 393 { 394 char cmd[128]; 395 396 os_snprintf(cmd, sizeof(cmd), "SELECT 1 FROM %s;", name); 397 return sqlite3_exec(db, cmd, NULL, NULL, NULL) == SQLITE_OK; 398 } 399 400 401 static int db_table_create_sim_provisioning(sqlite3 *db) 402 { 403 char *err = NULL; 404 const char *sql = 405 "CREATE TABLE sim_provisioning(" 406 " mobile_identifier_hash TEXT PRIMARY KEY," 407 " imsi TEXT," 408 " mac_addr TEXT," 409 " eap_method TEXT," 410 " timestamp TEXT" 411 ");"; 412 413 RADIUS_DEBUG("Adding database table for SIM provisioning information"); 414 if (sqlite3_exec(db, sql, NULL, NULL, &err) != SQLITE_OK) { 415 RADIUS_ERROR("SQLite error: %s", err); 416 sqlite3_free(err); 417 return -1; 418 } 419 420 return 0; 421 } 422 423 #endif /* CONFIG_HS20 */ 424 #endif /* CONFIG_SQLITE */ 425 426 427 void srv_log(struct radius_session *sess, const char *fmt, ...) 428 PRINTF_FORMAT(2, 3); 429 430 void srv_log(struct radius_session *sess, const char *fmt, ...) 431 { 432 va_list ap; 433 char *buf; 434 int buflen; 435 436 va_start(ap, fmt); 437 buflen = vsnprintf(NULL, 0, fmt, ap) + 1; 438 va_end(ap); 439 440 buf = os_malloc(buflen); 441 if (buf == NULL) 442 return; 443 va_start(ap, fmt); 444 vsnprintf(buf, buflen, fmt, ap); 445 va_end(ap); 446 447 RADIUS_DEBUG("[0x%x %s] %s", sess->sess_id, sess->nas_ip, buf); 448 449 #ifdef CONFIG_SQLITE 450 if (sess->server->db) { 451 char *sql; 452 sql = sqlite3_mprintf("INSERT INTO authlog" 453 "(timestamp,session,nas_ip,username,note)" 454 " VALUES (" 455 "strftime('%%Y-%%m-%%d %%H:%%M:%%f'," 456 "'now'),%u,%Q,%Q,%Q)", 457 sess->sess_id, sess->nas_ip, 458 sess->username, buf); 459 if (sql) { 460 if (sqlite3_exec(sess->server->db, sql, NULL, NULL, 461 NULL) != SQLITE_OK) { 462 RADIUS_ERROR("Failed to add authlog entry into sqlite database: %s", 463 sqlite3_errmsg(sess->server->db)); 464 } 465 sqlite3_free(sql); 466 } 467 } 468 #endif /* CONFIG_SQLITE */ 469 470 os_free(buf); 471 } 472 473 474 static struct radius_client * 475 radius_server_get_client(struct radius_server_data *data, struct in_addr *addr, 476 int ipv6) 477 { 478 struct radius_client *client = data->clients; 479 480 while (client) { 481 #ifdef CONFIG_IPV6 482 if (ipv6) { 483 struct in6_addr *addr6; 484 int i; 485 486 addr6 = (struct in6_addr *) addr; 487 for (i = 0; i < 16; i++) { 488 if ((addr6->s6_addr[i] & 489 client->mask6.s6_addr[i]) != 490 (client->addr6.s6_addr[i] & 491 client->mask6.s6_addr[i])) { 492 i = 17; 493 break; 494 } 495 } 496 if (i == 16) { 497 break; 498 } 499 } 500 #endif /* CONFIG_IPV6 */ 501 if (!ipv6 && (client->addr.s_addr & client->mask.s_addr) == 502 (addr->s_addr & client->mask.s_addr)) { 503 break; 504 } 505 506 client = client->next; 507 } 508 509 return client; 510 } 511 512 513 static struct radius_session * 514 radius_server_get_session(struct radius_client *client, unsigned int sess_id) 515 { 516 struct radius_session *sess = client->sessions; 517 518 while (sess) { 519 if (sess->sess_id == sess_id) { 520 break; 521 } 522 sess = sess->next; 523 } 524 525 return sess; 526 } 527 528 529 static void radius_server_session_free(struct radius_server_data *data, 530 struct radius_session *sess) 531 { 532 eloop_cancel_timeout(radius_server_session_timeout, data, sess); 533 eloop_cancel_timeout(radius_server_session_remove_timeout, data, sess); 534 eap_server_sm_deinit(sess->eap); 535 radius_msg_free(sess->last_msg); 536 os_free(sess->last_from_addr); 537 radius_msg_free(sess->last_reply); 538 os_free(sess->username); 539 os_free(sess->nas_ip); 540 os_free(sess); 541 data->num_sess--; 542 } 543 544 545 static void radius_server_session_remove(struct radius_server_data *data, 546 struct radius_session *sess) 547 { 548 struct radius_client *client = sess->client; 549 struct radius_session *session, *prev; 550 551 eloop_cancel_timeout(radius_server_session_remove_timeout, data, sess); 552 553 prev = NULL; 554 session = client->sessions; 555 while (session) { 556 if (session == sess) { 557 if (prev == NULL) { 558 client->sessions = sess->next; 559 } else { 560 prev->next = sess->next; 561 } 562 radius_server_session_free(data, sess); 563 break; 564 } 565 prev = session; 566 session = session->next; 567 } 568 } 569 570 571 static void radius_server_session_remove_timeout(void *eloop_ctx, 572 void *timeout_ctx) 573 { 574 struct radius_server_data *data = eloop_ctx; 575 struct radius_session *sess = timeout_ctx; 576 RADIUS_DEBUG("Removing completed session 0x%x", sess->sess_id); 577 radius_server_session_remove(data, sess); 578 } 579 580 581 static void radius_server_session_timeout(void *eloop_ctx, void *timeout_ctx) 582 { 583 struct radius_server_data *data = eloop_ctx; 584 struct radius_session *sess = timeout_ctx; 585 586 RADIUS_DEBUG("Timing out authentication session 0x%x", sess->sess_id); 587 radius_server_session_remove(data, sess); 588 } 589 590 591 static struct radius_session * 592 radius_server_new_session(struct radius_server_data *data, 593 struct radius_client *client) 594 { 595 struct radius_session *sess; 596 597 if (data->num_sess >= RADIUS_MAX_SESSION) { 598 RADIUS_DEBUG("Maximum number of existing session - no room " 599 "for a new session"); 600 return NULL; 601 } 602 603 sess = os_zalloc(sizeof(*sess)); 604 if (sess == NULL) 605 return NULL; 606 607 sess->server = data; 608 sess->client = client; 609 sess->sess_id = data->next_sess_id++; 610 sess->next = client->sessions; 611 client->sessions = sess; 612 eloop_register_timeout(RADIUS_SESSION_TIMEOUT, 0, 613 radius_server_session_timeout, data, sess); 614 data->num_sess++; 615 return sess; 616 } 617 618 619 #ifdef CONFIG_TESTING_OPTIONS 620 static void radius_server_testing_options_tls(struct radius_session *sess, 621 const char *tls, 622 struct eap_config *eap_conf) 623 { 624 int test = atoi(tls); 625 626 switch (test) { 627 case 1: 628 srv_log(sess, "TLS test - break VerifyData"); 629 eap_conf->tls_test_flags = TLS_BREAK_VERIFY_DATA; 630 break; 631 case 2: 632 srv_log(sess, "TLS test - break ServerKeyExchange ServerParams hash"); 633 eap_conf->tls_test_flags = TLS_BREAK_SRV_KEY_X_HASH; 634 break; 635 case 3: 636 srv_log(sess, "TLS test - break ServerKeyExchange ServerParams Signature"); 637 eap_conf->tls_test_flags = TLS_BREAK_SRV_KEY_X_SIGNATURE; 638 break; 639 case 4: 640 srv_log(sess, "TLS test - RSA-DHE using a short 511-bit prime"); 641 eap_conf->tls_test_flags = TLS_DHE_PRIME_511B; 642 break; 643 case 5: 644 srv_log(sess, "TLS test - RSA-DHE using a short 767-bit prime"); 645 eap_conf->tls_test_flags = TLS_DHE_PRIME_767B; 646 break; 647 case 6: 648 srv_log(sess, "TLS test - RSA-DHE using a bogus 15 \"prime\""); 649 eap_conf->tls_test_flags = TLS_DHE_PRIME_15; 650 break; 651 case 7: 652 srv_log(sess, "TLS test - RSA-DHE using a short 58-bit prime in long container"); 653 eap_conf->tls_test_flags = TLS_DHE_PRIME_58B; 654 break; 655 case 8: 656 srv_log(sess, "TLS test - RSA-DHE using a non-prime"); 657 eap_conf->tls_test_flags = TLS_DHE_NON_PRIME; 658 break; 659 default: 660 srv_log(sess, "Unrecognized TLS test"); 661 break; 662 } 663 } 664 #endif /* CONFIG_TESTING_OPTIONS */ 665 666 static void radius_server_testing_options(struct radius_session *sess, 667 struct eap_config *eap_conf) 668 { 669 #ifdef CONFIG_TESTING_OPTIONS 670 const char *pos; 671 672 pos = os_strstr(sess->username, "@test-"); 673 if (pos == NULL) 674 return; 675 pos += 6; 676 if (os_strncmp(pos, "tls-", 4) == 0) 677 radius_server_testing_options_tls(sess, pos + 4, eap_conf); 678 else 679 srv_log(sess, "Unrecognized test: %s", pos); 680 #endif /* CONFIG_TESTING_OPTIONS */ 681 } 682 683 684 #ifdef CONFIG_ERP 685 static struct eap_server_erp_key * 686 radius_server_erp_find_key(struct radius_server_data *data, const char *keyname) 687 { 688 struct eap_server_erp_key *erp; 689 690 dl_list_for_each(erp, &data->erp_keys, struct eap_server_erp_key, 691 list) { 692 if (os_strcmp(erp->keyname_nai, keyname) == 0) 693 return erp; 694 } 695 696 return NULL; 697 } 698 #endif /* CONFIG_ERP */ 699 700 701 static struct radius_session * 702 radius_server_get_new_session(struct radius_server_data *data, 703 struct radius_client *client, 704 struct radius_msg *msg, const char *from_addr) 705 { 706 u8 *user, *id; 707 size_t user_len, id_len; 708 int res; 709 struct radius_session *sess; 710 struct eap_config eap_conf; 711 struct eap_user *tmp; 712 713 RADIUS_DEBUG("Creating a new session"); 714 715 if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_USER_NAME, &user, 716 &user_len, NULL) < 0) { 717 RADIUS_DEBUG("Could not get User-Name"); 718 return NULL; 719 } 720 RADIUS_DUMP_ASCII("User-Name", user, user_len); 721 722 tmp = os_zalloc(sizeof(*tmp)); 723 if (!tmp) 724 return NULL; 725 726 res = data->get_eap_user(data->conf_ctx, user, user_len, 0, tmp); 727 #ifdef CONFIG_ERP 728 if (res != 0 && data->erp) { 729 char *username; 730 731 username = os_zalloc(user_len + 1); 732 if (username) { 733 os_memcpy(username, user, user_len); 734 if (radius_server_erp_find_key(data, username)) 735 res = 0; 736 os_free(username); 737 } 738 } 739 #endif /* CONFIG_ERP */ 740 if (res != 0) { 741 RADIUS_DEBUG("User-Name not found from user database"); 742 eap_user_free(tmp); 743 return NULL; 744 } 745 746 RADIUS_DEBUG("Matching user entry found"); 747 sess = radius_server_new_session(data, client); 748 if (sess == NULL) { 749 RADIUS_DEBUG("Failed to create a new session"); 750 eap_user_free(tmp); 751 return NULL; 752 } 753 sess->accept_attr = tmp->accept_attr; 754 sess->macacl = tmp->macacl; 755 eap_user_free(tmp); 756 757 sess->username = os_malloc(user_len * 4 + 1); 758 if (sess->username == NULL) { 759 radius_server_session_remove(data, sess); 760 return NULL; 761 } 762 printf_encode(sess->username, user_len * 4 + 1, user, user_len); 763 764 sess->nas_ip = os_strdup(from_addr); 765 if (sess->nas_ip == NULL) { 766 radius_server_session_remove(data, sess); 767 return NULL; 768 } 769 770 if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_CALLING_STATION_ID, &id, 771 &id_len, NULL) == 0) { 772 char buf[3 * ETH_ALEN]; 773 774 os_memset(buf, 0, sizeof(buf)); 775 if (id_len >= sizeof(buf)) 776 id_len = sizeof(buf) - 1; 777 os_memcpy(buf, id, id_len); 778 if (hwaddr_aton2(buf, sess->mac_addr) < 0) 779 os_memset(sess->mac_addr, 0, ETH_ALEN); 780 else 781 RADIUS_DEBUG("Calling-Station-Id: " MACSTR, 782 MAC2STR(sess->mac_addr)); 783 } 784 785 srv_log(sess, "New session created"); 786 787 os_memset(&eap_conf, 0, sizeof(eap_conf)); 788 eap_conf.ssl_ctx = data->ssl_ctx; 789 eap_conf.msg_ctx = data->msg_ctx; 790 eap_conf.eap_sim_db_priv = data->eap_sim_db_priv; 791 eap_conf.backend_auth = TRUE; 792 eap_conf.eap_server = 1; 793 eap_conf.pac_opaque_encr_key = data->pac_opaque_encr_key; 794 eap_conf.eap_fast_a_id = data->eap_fast_a_id; 795 eap_conf.eap_fast_a_id_len = data->eap_fast_a_id_len; 796 eap_conf.eap_fast_a_id_info = data->eap_fast_a_id_info; 797 eap_conf.eap_fast_prov = data->eap_fast_prov; 798 eap_conf.pac_key_lifetime = data->pac_key_lifetime; 799 eap_conf.pac_key_refresh_time = data->pac_key_refresh_time; 800 eap_conf.eap_teap_auth = data->eap_teap_auth; 801 eap_conf.eap_teap_pac_no_inner = data->eap_teap_pac_no_inner; 802 eap_conf.eap_sim_aka_result_ind = data->eap_sim_aka_result_ind; 803 eap_conf.eap_sim_id = data->eap_sim_id; 804 eap_conf.tnc = data->tnc; 805 eap_conf.wps = data->wps; 806 eap_conf.pwd_group = data->pwd_group; 807 eap_conf.server_id = (const u8 *) data->server_id; 808 eap_conf.server_id_len = os_strlen(data->server_id); 809 eap_conf.erp = data->erp; 810 eap_conf.tls_session_lifetime = data->tls_session_lifetime; 811 eap_conf.tls_flags = data->tls_flags; 812 radius_server_testing_options(sess, &eap_conf); 813 sess->eap = eap_server_sm_init(sess, &radius_server_eapol_cb, 814 &eap_conf); 815 if (sess->eap == NULL) { 816 RADIUS_DEBUG("Failed to initialize EAP state machine for the " 817 "new session"); 818 radius_server_session_remove(data, sess); 819 return NULL; 820 } 821 sess->eap_if = eap_get_interface(sess->eap); 822 sess->eap_if->eapRestart = TRUE; 823 sess->eap_if->portEnabled = TRUE; 824 825 RADIUS_DEBUG("New session 0x%x initialized", sess->sess_id); 826 827 return sess; 828 } 829 830 831 #ifdef CONFIG_HS20 832 static void radius_srv_hs20_t_c_pending(struct radius_session *sess) 833 { 834 #ifdef CONFIG_SQLITE 835 char *sql; 836 char addr[3 * ETH_ALEN], *id_str; 837 const u8 *id; 838 size_t id_len; 839 840 if (!sess->server->db || !sess->eap || 841 is_zero_ether_addr(sess->mac_addr)) 842 return; 843 844 os_snprintf(addr, sizeof(addr), MACSTR, MAC2STR(sess->mac_addr)); 845 846 id = eap_get_identity(sess->eap, &id_len); 847 if (!id) 848 return; 849 id_str = os_malloc(id_len + 1); 850 if (!id_str) 851 return; 852 os_memcpy(id_str, id, id_len); 853 id_str[id_len] = '\0'; 854 855 sql = sqlite3_mprintf("INSERT OR REPLACE INTO pending_tc (mac_addr,identity) VALUES (%Q,%Q)", 856 addr, id_str); 857 os_free(id_str); 858 if (!sql) 859 return; 860 861 if (sqlite3_exec(sess->server->db, sql, NULL, NULL, NULL) != 862 SQLITE_OK) { 863 RADIUS_ERROR("Failed to add pending_tc entry into sqlite database: %s", 864 sqlite3_errmsg(sess->server->db)); 865 } 866 sqlite3_free(sql); 867 #endif /* CONFIG_SQLITE */ 868 } 869 #endif /* CONFIG_HS20 */ 870 871 872 static void radius_server_add_session(struct radius_session *sess) 873 { 874 #ifdef CONFIG_SQLITE 875 char *sql; 876 char addr_txt[ETH_ALEN * 3]; 877 struct os_time now; 878 879 if (!sess->server->db) 880 return; 881 882 883 os_snprintf(addr_txt, sizeof(addr_txt), MACSTR, 884 MAC2STR(sess->mac_addr)); 885 886 os_get_time(&now); 887 sql = sqlite3_mprintf("INSERT OR REPLACE INTO current_sessions(mac_addr,identity,start_time,nas,hs20_t_c_filtering) VALUES (%Q,%Q,%d,%Q,%u)", 888 addr_txt, sess->username, now.sec, 889 sess->nas_ip, sess->t_c_filtering); 890 if (sql) { 891 if (sqlite3_exec(sess->server->db, sql, NULL, NULL, 892 NULL) != SQLITE_OK) { 893 RADIUS_ERROR("Failed to add current_sessions entry into sqlite database: %s", 894 sqlite3_errmsg(sess->server->db)); 895 } 896 sqlite3_free(sql); 897 } 898 #endif /* CONFIG_SQLITE */ 899 } 900 901 902 static void db_update_last_msk(struct radius_session *sess, const char *msk) 903 { 904 #ifdef CONFIG_RADIUS_TEST 905 #ifdef CONFIG_SQLITE 906 char *sql = NULL; 907 char *id_str = NULL; 908 const u8 *id; 909 size_t id_len; 910 const char *serial_num; 911 912 if (!sess->server->db) 913 return; 914 915 serial_num = eap_get_serial_num(sess->eap); 916 if (serial_num) { 917 id_len = 5 + os_strlen(serial_num) + 1; 918 id_str = os_malloc(id_len); 919 if (!id_str) 920 return; 921 os_snprintf(id_str, id_len, "cert-%s", serial_num); 922 } else { 923 id = eap_get_identity(sess->eap, &id_len); 924 if (!id) 925 return; 926 id_str = os_malloc(id_len + 1); 927 if (!id_str) 928 return; 929 os_memcpy(id_str, id, id_len); 930 id_str[id_len] = '\0'; 931 } 932 933 sql = sqlite3_mprintf("UPDATE users SET last_msk=%Q WHERE identity=%Q", 934 msk, id_str); 935 os_free(id_str); 936 if (!sql) 937 return; 938 939 if (sqlite3_exec(sess->server->db, sql, NULL, NULL, NULL) != 940 SQLITE_OK) { 941 RADIUS_DEBUG("Failed to update last_msk: %s", 942 sqlite3_errmsg(sess->server->db)); 943 } 944 sqlite3_free(sql); 945 #endif /* CONFIG_SQLITE */ 946 #endif /* CONFIG_RADIUS_TEST */ 947 } 948 949 950 #ifdef CONFIG_HS20 951 952 static int radius_server_is_sim_method(struct radius_session *sess) 953 { 954 const char *name; 955 956 name = eap_get_method(sess->eap); 957 return name && 958 (os_strcmp(name, "SIM") == 0 || 959 os_strcmp(name, "AKA") == 0 || 960 os_strcmp(name, "AKA'") == 0); 961 } 962 963 964 static int radius_server_hs20_missing_sim_pps(struct radius_msg *request) 965 { 966 u8 *buf, *pos, *end, type, sublen; 967 size_t len; 968 969 buf = NULL; 970 for (;;) { 971 if (radius_msg_get_attr_ptr(request, 972 RADIUS_ATTR_VENDOR_SPECIFIC, 973 &buf, &len, buf) < 0) 974 return 0; 975 if (len < 6) 976 continue; 977 pos = buf; 978 end = buf + len; 979 if (WPA_GET_BE32(pos) != RADIUS_VENDOR_ID_WFA) 980 continue; 981 pos += 4; 982 983 type = *pos++; 984 sublen = *pos++; 985 if (sublen < 2) 986 continue; /* invalid length */ 987 sublen -= 2; /* skip header */ 988 if (pos + sublen > end) 989 continue; /* invalid WFA VSA */ 990 991 if (type != RADIUS_VENDOR_ATTR_WFA_HS20_STA_VERSION) 992 continue; 993 994 RADIUS_DUMP("HS2.0 mobile device version", pos, sublen); 995 if (sublen < 1 + 2) 996 continue; 997 if (pos[0] == 0) 998 continue; /* Release 1 STA does not support provisioning 999 1000 */ 1001 /* UpdateIdentifier 0 indicates no PPS MO */ 1002 return WPA_GET_BE16(pos + 1) == 0; 1003 } 1004 } 1005 1006 1007 #define HS20_MOBILE_ID_HASH_LEN 16 1008 1009 static int radius_server_sim_provisioning_session(struct radius_session *sess, 1010 const u8 *hash) 1011 { 1012 #ifdef CONFIG_SQLITE 1013 char *sql; 1014 char addr_txt[ETH_ALEN * 3]; 1015 char hash_txt[2 * HS20_MOBILE_ID_HASH_LEN + 1]; 1016 struct os_time now; 1017 int res; 1018 const char *imsi, *eap_method; 1019 1020 if (!sess->server->db || 1021 (!db_table_exists(sess->server->db, "sim_provisioning") && 1022 db_table_create_sim_provisioning(sess->server->db) < 0)) 1023 return -1; 1024 1025 imsi = eap_get_imsi(sess->eap); 1026 if (!imsi) 1027 return -1; 1028 1029 eap_method = eap_get_method(sess->eap); 1030 if (!eap_method) 1031 return -1; 1032 1033 os_snprintf(addr_txt, sizeof(addr_txt), MACSTR, 1034 MAC2STR(sess->mac_addr)); 1035 wpa_snprintf_hex(hash_txt, sizeof(hash_txt), hash, 1036 HS20_MOBILE_ID_HASH_LEN); 1037 1038 os_get_time(&now); 1039 sql = sqlite3_mprintf("INSERT INTO sim_provisioning(mobile_identifier_hash,imsi,mac_addr,eap_method,timestamp) VALUES (%Q,%Q,%Q,%Q,%u)", 1040 hash_txt, imsi, addr_txt, eap_method, now.sec); 1041 if (!sql) 1042 return -1; 1043 1044 if (sqlite3_exec(sess->server->db, sql, NULL, NULL, NULL) != 1045 SQLITE_OK) { 1046 RADIUS_ERROR("Failed to add SIM provisioning entry into sqlite database: %s", 1047 sqlite3_errmsg(sess->server->db)); 1048 res = -1; 1049 } else { 1050 res = 0; 1051 } 1052 sqlite3_free(sql); 1053 return res; 1054 #endif /* CONFIG_SQLITE */ 1055 return -1; 1056 } 1057 1058 #endif /* CONFIG_HS20 */ 1059 1060 1061 static struct radius_msg * 1062 radius_server_encapsulate_eap(struct radius_server_data *data, 1063 struct radius_client *client, 1064 struct radius_session *sess, 1065 struct radius_msg *request) 1066 { 1067 struct radius_msg *msg; 1068 int code; 1069 unsigned int sess_id; 1070 struct radius_hdr *hdr = radius_msg_get_hdr(request); 1071 u16 reason = WLAN_REASON_IEEE_802_1X_AUTH_FAILED; 1072 1073 if (sess->eap_if->eapFail) { 1074 sess->eap_if->eapFail = FALSE; 1075 code = RADIUS_CODE_ACCESS_REJECT; 1076 } else if (sess->eap_if->eapSuccess) { 1077 sess->eap_if->eapSuccess = FALSE; 1078 code = RADIUS_CODE_ACCESS_ACCEPT; 1079 } else { 1080 sess->eap_if->eapReq = FALSE; 1081 code = RADIUS_CODE_ACCESS_CHALLENGE; 1082 } 1083 1084 msg = radius_msg_new(code, hdr->identifier); 1085 if (msg == NULL) { 1086 RADIUS_DEBUG("Failed to allocate reply message"); 1087 return NULL; 1088 } 1089 1090 sess_id = htonl(sess->sess_id); 1091 if (code == RADIUS_CODE_ACCESS_CHALLENGE && 1092 !radius_msg_add_attr(msg, RADIUS_ATTR_STATE, 1093 (u8 *) &sess_id, sizeof(sess_id))) { 1094 RADIUS_DEBUG("Failed to add State attribute"); 1095 } 1096 1097 if (sess->eap_if->eapReqData && 1098 !radius_msg_add_eap(msg, wpabuf_head(sess->eap_if->eapReqData), 1099 wpabuf_len(sess->eap_if->eapReqData))) { 1100 RADIUS_DEBUG("Failed to add EAP-Message attribute"); 1101 } 1102 1103 if (code == RADIUS_CODE_ACCESS_ACCEPT && sess->eap_if->eapKeyData) { 1104 int len; 1105 #ifdef CONFIG_RADIUS_TEST 1106 char buf[2 * 64 + 1]; 1107 1108 len = sess->eap_if->eapKeyDataLen; 1109 if (len > 64) 1110 len = 64; 1111 len = wpa_snprintf_hex(buf, sizeof(buf), 1112 sess->eap_if->eapKeyData, len); 1113 buf[len] = '\0'; 1114 1115 if (data->dump_msk_file) { 1116 FILE *f; 1117 1118 f = fopen(data->dump_msk_file, "a"); 1119 if (f) { 1120 len = sess->eap_if->eapKeyDataLen; 1121 if (len > 64) 1122 len = 64; 1123 len = wpa_snprintf_hex( 1124 buf, sizeof(buf), 1125 sess->eap_if->eapKeyData, len); 1126 buf[len] = '\0'; 1127 fprintf(f, "%s\n", buf); 1128 fclose(f); 1129 } 1130 } 1131 1132 db_update_last_msk(sess, buf); 1133 #endif /* CONFIG_RADIUS_TEST */ 1134 if (sess->eap_if->eapKeyDataLen > 64) { 1135 len = 32; 1136 } else { 1137 len = sess->eap_if->eapKeyDataLen / 2; 1138 } 1139 if (!radius_msg_add_mppe_keys(msg, hdr->authenticator, 1140 (u8 *) client->shared_secret, 1141 client->shared_secret_len, 1142 sess->eap_if->eapKeyData + len, 1143 len, sess->eap_if->eapKeyData, 1144 len)) { 1145 RADIUS_DEBUG("Failed to add MPPE key attributes"); 1146 } 1147 1148 if (sess->eap_if->eapSessionId && 1149 !radius_msg_add_attr(msg, RADIUS_ATTR_EAP_KEY_NAME, 1150 sess->eap_if->eapSessionId, 1151 sess->eap_if->eapSessionIdLen)) { 1152 RADIUS_DEBUG("Failed to add EAP-Key-Name attribute"); 1153 } 1154 } 1155 1156 #ifdef CONFIG_HS20 1157 if (code == RADIUS_CODE_ACCESS_ACCEPT && sess->remediation && 1158 data->subscr_remediation_url) { 1159 u8 *buf; 1160 size_t url_len = os_strlen(data->subscr_remediation_url); 1161 buf = os_malloc(1 + url_len); 1162 if (buf == NULL) { 1163 radius_msg_free(msg); 1164 return NULL; 1165 } 1166 buf[0] = data->subscr_remediation_method; 1167 os_memcpy(&buf[1], data->subscr_remediation_url, url_len); 1168 if (!radius_msg_add_wfa( 1169 msg, RADIUS_VENDOR_ATTR_WFA_HS20_SUBSCR_REMEDIATION, 1170 buf, 1 + url_len)) { 1171 RADIUS_DEBUG("Failed to add WFA-HS20-SubscrRem"); 1172 } 1173 os_free(buf); 1174 } else if (code == RADIUS_CODE_ACCESS_ACCEPT && sess->remediation) { 1175 u8 buf[1]; 1176 if (!radius_msg_add_wfa( 1177 msg, RADIUS_VENDOR_ATTR_WFA_HS20_SUBSCR_REMEDIATION, 1178 buf, 0)) { 1179 RADIUS_DEBUG("Failed to add WFA-HS20-SubscrRem"); 1180 } 1181 } else if (code == RADIUS_CODE_ACCESS_ACCEPT && 1182 data->hs20_sim_provisioning_url && 1183 radius_server_is_sim_method(sess) && 1184 radius_server_hs20_missing_sim_pps(request)) { 1185 u8 *buf, *pos, hash[HS20_MOBILE_ID_HASH_LEN]; 1186 size_t prefix_len, url_len; 1187 1188 RADIUS_DEBUG("Device needs HS 2.0 SIM provisioning"); 1189 1190 if (os_get_random(hash, HS20_MOBILE_ID_HASH_LEN) < 0) { 1191 radius_msg_free(msg); 1192 return NULL; 1193 } 1194 RADIUS_DUMP("hotspot2dot0-mobile-identifier-hash", 1195 hash, HS20_MOBILE_ID_HASH_LEN); 1196 1197 if (radius_server_sim_provisioning_session(sess, hash) < 0) { 1198 radius_msg_free(msg); 1199 return NULL; 1200 } 1201 1202 prefix_len = os_strlen(data->hs20_sim_provisioning_url); 1203 url_len = prefix_len + 2 * HS20_MOBILE_ID_HASH_LEN; 1204 buf = os_malloc(1 + url_len + 1); 1205 if (!buf) { 1206 radius_msg_free(msg); 1207 return NULL; 1208 } 1209 pos = buf; 1210 *pos++ = data->subscr_remediation_method; 1211 os_memcpy(pos, data->hs20_sim_provisioning_url, prefix_len); 1212 pos += prefix_len; 1213 wpa_snprintf_hex((char *) pos, 2 * HS20_MOBILE_ID_HASH_LEN + 1, 1214 hash, HS20_MOBILE_ID_HASH_LEN); 1215 RADIUS_DEBUG("HS 2.0 subscription remediation URL: %s", 1216 (char *) &buf[1]); 1217 if (!radius_msg_add_wfa( 1218 msg, RADIUS_VENDOR_ATTR_WFA_HS20_SUBSCR_REMEDIATION, 1219 buf, 1 + url_len)) { 1220 RADIUS_DEBUG("Failed to add WFA-HS20-SubscrRem"); 1221 } 1222 os_free(buf); 1223 } 1224 1225 if (code == RADIUS_CODE_ACCESS_ACCEPT && sess->t_c_filtering) { 1226 u8 buf[4] = { 0x01, 0x00, 0x00, 0x00 }; /* E=1 */ 1227 const char *url = data->t_c_server_url, *pos; 1228 char *url2, *end2, *pos2; 1229 size_t url_len; 1230 1231 if (!radius_msg_add_wfa( 1232 msg, RADIUS_VENDOR_ATTR_WFA_HS20_T_C_FILTERING, 1233 buf, sizeof(buf))) { 1234 RADIUS_DEBUG("Failed to add WFA-HS20-T-C-Filtering"); 1235 radius_msg_free(msg); 1236 return NULL; 1237 } 1238 1239 if (!url) { 1240 RADIUS_DEBUG("No t_c_server_url configured"); 1241 radius_msg_free(msg); 1242 return NULL; 1243 } 1244 1245 pos = os_strstr(url, "@1@"); 1246 if (!pos) { 1247 RADIUS_DEBUG("No @1@ macro in t_c_server_url"); 1248 radius_msg_free(msg); 1249 return NULL; 1250 } 1251 1252 url_len = os_strlen(url) + ETH_ALEN * 3 - 1 - 3; 1253 url2 = os_malloc(url_len + 1); 1254 if (!url2) { 1255 RADIUS_DEBUG("Failed to allocate room for T&C Server URL"); 1256 os_free(url2); 1257 radius_msg_free(msg); 1258 return NULL; 1259 } 1260 pos2 = url2; 1261 end2 = url2 + url_len + 1; 1262 os_memcpy(pos2, url, pos - url); 1263 pos2 += pos - url; 1264 os_snprintf(pos2, end2 - pos2, MACSTR, MAC2STR(sess->mac_addr)); 1265 pos2 += ETH_ALEN * 3 - 1; 1266 os_memcpy(pos2, pos + 3, os_strlen(pos + 3)); 1267 if (!radius_msg_add_wfa(msg, 1268 RADIUS_VENDOR_ATTR_WFA_HS20_T_C_URL, 1269 (const u8 *) url2, url_len)) { 1270 RADIUS_DEBUG("Failed to add WFA-HS20-T-C-URL"); 1271 os_free(url2); 1272 radius_msg_free(msg); 1273 return NULL; 1274 } 1275 os_free(url2); 1276 1277 radius_srv_hs20_t_c_pending(sess); 1278 } 1279 #endif /* CONFIG_HS20 */ 1280 1281 if (radius_msg_copy_attr(msg, request, RADIUS_ATTR_PROXY_STATE) < 0) { 1282 RADIUS_DEBUG("Failed to copy Proxy-State attribute(s)"); 1283 radius_msg_free(msg); 1284 return NULL; 1285 } 1286 1287 if (code == RADIUS_CODE_ACCESS_ACCEPT) { 1288 struct hostapd_radius_attr *attr; 1289 for (attr = sess->accept_attr; attr; attr = attr->next) { 1290 if (!radius_msg_add_attr(msg, attr->type, 1291 wpabuf_head(attr->val), 1292 wpabuf_len(attr->val))) { 1293 wpa_printf(MSG_ERROR, "Could not add RADIUS attribute"); 1294 radius_msg_free(msg); 1295 return NULL; 1296 } 1297 } 1298 } 1299 1300 if (code == RADIUS_CODE_ACCESS_REJECT) { 1301 if (radius_msg_add_attr_int32(msg, RADIUS_ATTR_WLAN_REASON_CODE, 1302 reason) < 0) { 1303 RADIUS_DEBUG("Failed to add WLAN-Reason-Code attribute"); 1304 radius_msg_free(msg); 1305 return NULL; 1306 } 1307 } 1308 1309 if (radius_msg_finish_srv(msg, (u8 *) client->shared_secret, 1310 client->shared_secret_len, 1311 hdr->authenticator) < 0) { 1312 RADIUS_DEBUG("Failed to add Message-Authenticator attribute"); 1313 } 1314 1315 if (code == RADIUS_CODE_ACCESS_ACCEPT) 1316 radius_server_add_session(sess); 1317 1318 return msg; 1319 } 1320 1321 1322 static struct radius_msg * 1323 radius_server_macacl(struct radius_server_data *data, 1324 struct radius_client *client, 1325 struct radius_session *sess, 1326 struct radius_msg *request) 1327 { 1328 struct radius_msg *msg; 1329 int code; 1330 struct radius_hdr *hdr = radius_msg_get_hdr(request); 1331 u8 *pw; 1332 size_t pw_len; 1333 1334 code = RADIUS_CODE_ACCESS_ACCEPT; 1335 1336 if (radius_msg_get_attr_ptr(request, RADIUS_ATTR_USER_PASSWORD, &pw, 1337 &pw_len, NULL) < 0) { 1338 RADIUS_DEBUG("Could not get User-Password"); 1339 code = RADIUS_CODE_ACCESS_REJECT; 1340 } else { 1341 int res; 1342 struct eap_user tmp; 1343 1344 os_memset(&tmp, 0, sizeof(tmp)); 1345 res = data->get_eap_user(data->conf_ctx, (u8 *) sess->username, 1346 os_strlen(sess->username), 0, &tmp); 1347 if (res || !tmp.macacl || tmp.password == NULL) { 1348 RADIUS_DEBUG("No MAC ACL user entry"); 1349 bin_clear_free(tmp.password, tmp.password_len); 1350 code = RADIUS_CODE_ACCESS_REJECT; 1351 } else { 1352 u8 buf[128]; 1353 res = radius_user_password_hide( 1354 request, tmp.password, tmp.password_len, 1355 (u8 *) client->shared_secret, 1356 client->shared_secret_len, 1357 buf, sizeof(buf)); 1358 bin_clear_free(tmp.password, tmp.password_len); 1359 1360 if (res < 0 || pw_len != (size_t) res || 1361 os_memcmp_const(pw, buf, res) != 0) { 1362 RADIUS_DEBUG("Incorrect User-Password"); 1363 code = RADIUS_CODE_ACCESS_REJECT; 1364 } 1365 } 1366 } 1367 1368 msg = radius_msg_new(code, hdr->identifier); 1369 if (msg == NULL) { 1370 RADIUS_DEBUG("Failed to allocate reply message"); 1371 return NULL; 1372 } 1373 1374 if (radius_msg_copy_attr(msg, request, RADIUS_ATTR_PROXY_STATE) < 0) { 1375 RADIUS_DEBUG("Failed to copy Proxy-State attribute(s)"); 1376 radius_msg_free(msg); 1377 return NULL; 1378 } 1379 1380 if (code == RADIUS_CODE_ACCESS_ACCEPT) { 1381 struct hostapd_radius_attr *attr; 1382 for (attr = sess->accept_attr; attr; attr = attr->next) { 1383 if (!radius_msg_add_attr(msg, attr->type, 1384 wpabuf_head(attr->val), 1385 wpabuf_len(attr->val))) { 1386 wpa_printf(MSG_ERROR, "Could not add RADIUS attribute"); 1387 radius_msg_free(msg); 1388 return NULL; 1389 } 1390 } 1391 } 1392 1393 if (radius_msg_finish_srv(msg, (u8 *) client->shared_secret, 1394 client->shared_secret_len, 1395 hdr->authenticator) < 0) { 1396 RADIUS_DEBUG("Failed to add Message-Authenticator attribute"); 1397 } 1398 1399 return msg; 1400 } 1401 1402 1403 static int radius_server_reject(struct radius_server_data *data, 1404 struct radius_client *client, 1405 struct radius_msg *request, 1406 struct sockaddr *from, socklen_t fromlen, 1407 const char *from_addr, int from_port) 1408 { 1409 struct radius_msg *msg; 1410 int ret = 0; 1411 struct eap_hdr eapfail; 1412 struct wpabuf *buf; 1413 struct radius_hdr *hdr = radius_msg_get_hdr(request); 1414 1415 RADIUS_DEBUG("Reject invalid request from %s:%d", 1416 from_addr, from_port); 1417 1418 msg = radius_msg_new(RADIUS_CODE_ACCESS_REJECT, hdr->identifier); 1419 if (msg == NULL) { 1420 return -1; 1421 } 1422 1423 os_memset(&eapfail, 0, sizeof(eapfail)); 1424 eapfail.code = EAP_CODE_FAILURE; 1425 eapfail.identifier = 0; 1426 eapfail.length = host_to_be16(sizeof(eapfail)); 1427 1428 if (!radius_msg_add_eap(msg, (u8 *) &eapfail, sizeof(eapfail))) { 1429 RADIUS_DEBUG("Failed to add EAP-Message attribute"); 1430 } 1431 1432 if (radius_msg_copy_attr(msg, request, RADIUS_ATTR_PROXY_STATE) < 0) { 1433 RADIUS_DEBUG("Failed to copy Proxy-State attribute(s)"); 1434 radius_msg_free(msg); 1435 return -1; 1436 } 1437 1438 if (radius_msg_finish_srv(msg, (u8 *) client->shared_secret, 1439 client->shared_secret_len, 1440 hdr->authenticator) < 1441 0) { 1442 RADIUS_DEBUG("Failed to add Message-Authenticator attribute"); 1443 } 1444 1445 if (wpa_debug_level <= MSG_MSGDUMP) { 1446 radius_msg_dump(msg); 1447 } 1448 1449 data->counters.access_rejects++; 1450 client->counters.access_rejects++; 1451 buf = radius_msg_get_buf(msg); 1452 if (sendto(data->auth_sock, wpabuf_head(buf), wpabuf_len(buf), 0, 1453 (struct sockaddr *) from, sizeof(*from)) < 0) { 1454 wpa_printf(MSG_INFO, "sendto[RADIUS SRV]: %s", strerror(errno)); 1455 ret = -1; 1456 } 1457 1458 radius_msg_free(msg); 1459 1460 return ret; 1461 } 1462 1463 1464 static void radius_server_hs20_t_c_check(struct radius_session *sess, 1465 struct radius_msg *msg) 1466 { 1467 #ifdef CONFIG_HS20 1468 u8 *buf, *pos, *end, type, sublen, *timestamp = NULL; 1469 size_t len; 1470 1471 buf = NULL; 1472 for (;;) { 1473 if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_VENDOR_SPECIFIC, 1474 &buf, &len, buf) < 0) 1475 break; 1476 if (len < 6) 1477 continue; 1478 pos = buf; 1479 end = buf + len; 1480 if (WPA_GET_BE32(pos) != RADIUS_VENDOR_ID_WFA) 1481 continue; 1482 pos += 4; 1483 1484 type = *pos++; 1485 sublen = *pos++; 1486 if (sublen < 2) 1487 continue; /* invalid length */ 1488 sublen -= 2; /* skip header */ 1489 if (pos + sublen > end) 1490 continue; /* invalid WFA VSA */ 1491 1492 if (type == RADIUS_VENDOR_ATTR_WFA_HS20_TIMESTAMP && len >= 4) { 1493 timestamp = pos; 1494 break; 1495 } 1496 } 1497 1498 if (!timestamp) 1499 return; 1500 RADIUS_DEBUG("HS20-Timestamp: %u", WPA_GET_BE32(timestamp)); 1501 if (sess->t_c_timestamp != WPA_GET_BE32(timestamp)) { 1502 RADIUS_DEBUG("Last read T&C timestamp does not match HS20-Timestamp --> require filtering"); 1503 sess->t_c_filtering = 1; 1504 } 1505 #endif /* CONFIG_HS20 */ 1506 } 1507 1508 1509 static int radius_server_request(struct radius_server_data *data, 1510 struct radius_msg *msg, 1511 struct sockaddr *from, socklen_t fromlen, 1512 struct radius_client *client, 1513 const char *from_addr, int from_port, 1514 struct radius_session *force_sess) 1515 { 1516 struct wpabuf *eap = NULL; 1517 int res, state_included = 0; 1518 u8 statebuf[4]; 1519 unsigned int state; 1520 struct radius_session *sess; 1521 struct radius_msg *reply; 1522 int is_complete = 0; 1523 1524 if (force_sess) 1525 sess = force_sess; 1526 else { 1527 res = radius_msg_get_attr(msg, RADIUS_ATTR_STATE, statebuf, 1528 sizeof(statebuf)); 1529 state_included = res >= 0; 1530 if (res == sizeof(statebuf)) { 1531 state = WPA_GET_BE32(statebuf); 1532 sess = radius_server_get_session(client, state); 1533 } else { 1534 sess = NULL; 1535 } 1536 } 1537 1538 if (sess) { 1539 RADIUS_DEBUG("Request for session 0x%x", sess->sess_id); 1540 } else if (state_included) { 1541 RADIUS_DEBUG("State attribute included but no session found"); 1542 radius_server_reject(data, client, msg, from, fromlen, 1543 from_addr, from_port); 1544 return -1; 1545 } else { 1546 sess = radius_server_get_new_session(data, client, msg, 1547 from_addr); 1548 if (sess == NULL) { 1549 RADIUS_DEBUG("Could not create a new session"); 1550 radius_server_reject(data, client, msg, from, fromlen, 1551 from_addr, from_port); 1552 return -1; 1553 } 1554 } 1555 1556 if (sess->last_from_port == from_port && 1557 sess->last_identifier == radius_msg_get_hdr(msg)->identifier && 1558 os_memcmp(sess->last_authenticator, 1559 radius_msg_get_hdr(msg)->authenticator, 16) == 0) { 1560 RADIUS_DEBUG("Duplicate message from %s", from_addr); 1561 data->counters.dup_access_requests++; 1562 client->counters.dup_access_requests++; 1563 1564 if (sess->last_reply) { 1565 struct wpabuf *buf; 1566 buf = radius_msg_get_buf(sess->last_reply); 1567 res = sendto(data->auth_sock, wpabuf_head(buf), 1568 wpabuf_len(buf), 0, 1569 (struct sockaddr *) from, fromlen); 1570 if (res < 0) { 1571 wpa_printf(MSG_INFO, "sendto[RADIUS SRV]: %s", 1572 strerror(errno)); 1573 } 1574 return 0; 1575 } 1576 1577 RADIUS_DEBUG("No previous reply available for duplicate " 1578 "message"); 1579 return -1; 1580 } 1581 1582 eap = radius_msg_get_eap(msg); 1583 if (eap == NULL && sess->macacl) { 1584 reply = radius_server_macacl(data, client, sess, msg); 1585 if (reply == NULL) 1586 return -1; 1587 goto send_reply; 1588 } 1589 if (eap == NULL) { 1590 RADIUS_DEBUG("No EAP-Message in RADIUS packet from %s", 1591 from_addr); 1592 data->counters.packets_dropped++; 1593 client->counters.packets_dropped++; 1594 return -1; 1595 } 1596 1597 RADIUS_DUMP("Received EAP data", wpabuf_head(eap), wpabuf_len(eap)); 1598 1599 /* FIX: if Code is Request, Success, or Failure, send Access-Reject; 1600 * RFC3579 Sect. 2.6.2. 1601 * Include EAP-Response/Nak with no preferred method if 1602 * code == request. 1603 * If code is not 1-4, discard the packet silently. 1604 * Or is this already done by the EAP state machine? */ 1605 1606 wpabuf_free(sess->eap_if->eapRespData); 1607 sess->eap_if->eapRespData = eap; 1608 sess->eap_if->eapResp = TRUE; 1609 eap_server_sm_step(sess->eap); 1610 1611 if ((sess->eap_if->eapReq || sess->eap_if->eapSuccess || 1612 sess->eap_if->eapFail) && sess->eap_if->eapReqData) { 1613 RADIUS_DUMP("EAP data from the state machine", 1614 wpabuf_head(sess->eap_if->eapReqData), 1615 wpabuf_len(sess->eap_if->eapReqData)); 1616 } else if (sess->eap_if->eapFail) { 1617 RADIUS_DEBUG("No EAP data from the state machine, but eapFail " 1618 "set"); 1619 } else if (eap_sm_method_pending(sess->eap)) { 1620 radius_msg_free(sess->last_msg); 1621 sess->last_msg = msg; 1622 sess->last_from_port = from_port; 1623 os_free(sess->last_from_addr); 1624 sess->last_from_addr = os_strdup(from_addr); 1625 sess->last_fromlen = fromlen; 1626 os_memcpy(&sess->last_from, from, fromlen); 1627 return -2; 1628 } else { 1629 RADIUS_DEBUG("No EAP data from the state machine - ignore this" 1630 " Access-Request silently (assuming it was a " 1631 "duplicate)"); 1632 data->counters.packets_dropped++; 1633 client->counters.packets_dropped++; 1634 return -1; 1635 } 1636 1637 if (sess->eap_if->eapSuccess || sess->eap_if->eapFail) 1638 is_complete = 1; 1639 if (sess->eap_if->eapFail) { 1640 srv_log(sess, "EAP authentication failed"); 1641 db_update_last_msk(sess, "FAIL"); 1642 } else if (sess->eap_if->eapSuccess) { 1643 srv_log(sess, "EAP authentication succeeded"); 1644 } 1645 1646 if (sess->eap_if->eapSuccess) 1647 radius_server_hs20_t_c_check(sess, msg); 1648 1649 reply = radius_server_encapsulate_eap(data, client, sess, msg); 1650 1651 send_reply: 1652 if (reply) { 1653 struct wpabuf *buf; 1654 struct radius_hdr *hdr; 1655 1656 RADIUS_DEBUG("Reply to %s:%d", from_addr, from_port); 1657 if (wpa_debug_level <= MSG_MSGDUMP) { 1658 radius_msg_dump(reply); 1659 } 1660 1661 switch (radius_msg_get_hdr(reply)->code) { 1662 case RADIUS_CODE_ACCESS_ACCEPT: 1663 srv_log(sess, "Sending Access-Accept"); 1664 data->counters.access_accepts++; 1665 client->counters.access_accepts++; 1666 break; 1667 case RADIUS_CODE_ACCESS_REJECT: 1668 srv_log(sess, "Sending Access-Reject"); 1669 data->counters.access_rejects++; 1670 client->counters.access_rejects++; 1671 break; 1672 case RADIUS_CODE_ACCESS_CHALLENGE: 1673 data->counters.access_challenges++; 1674 client->counters.access_challenges++; 1675 break; 1676 } 1677 buf = radius_msg_get_buf(reply); 1678 res = sendto(data->auth_sock, wpabuf_head(buf), 1679 wpabuf_len(buf), 0, 1680 (struct sockaddr *) from, fromlen); 1681 if (res < 0) { 1682 wpa_printf(MSG_INFO, "sendto[RADIUS SRV]: %s", 1683 strerror(errno)); 1684 } 1685 radius_msg_free(sess->last_reply); 1686 sess->last_reply = reply; 1687 sess->last_from_port = from_port; 1688 hdr = radius_msg_get_hdr(msg); 1689 sess->last_identifier = hdr->identifier; 1690 os_memcpy(sess->last_authenticator, hdr->authenticator, 16); 1691 } else { 1692 data->counters.packets_dropped++; 1693 client->counters.packets_dropped++; 1694 } 1695 1696 if (is_complete) { 1697 RADIUS_DEBUG("Removing completed session 0x%x after timeout", 1698 sess->sess_id); 1699 eloop_cancel_timeout(radius_server_session_remove_timeout, 1700 data, sess); 1701 eloop_register_timeout(RADIUS_SESSION_MAINTAIN, 0, 1702 radius_server_session_remove_timeout, 1703 data, sess); 1704 } 1705 1706 return 0; 1707 } 1708 1709 1710 static void 1711 radius_server_receive_disconnect_resp(struct radius_server_data *data, 1712 struct radius_client *client, 1713 struct radius_msg *msg, int ack) 1714 { 1715 struct radius_hdr *hdr; 1716 1717 if (!client->pending_dac_disconnect_req) { 1718 RADIUS_DEBUG("Ignore unexpected Disconnect response"); 1719 radius_msg_free(msg); 1720 return; 1721 } 1722 1723 hdr = radius_msg_get_hdr(msg); 1724 if (hdr->identifier != client->pending_dac_disconnect_id) { 1725 RADIUS_DEBUG("Ignore unexpected Disconnect response with unexpected identifier %u (expected %u)", 1726 hdr->identifier, 1727 client->pending_dac_disconnect_id); 1728 radius_msg_free(msg); 1729 return; 1730 } 1731 1732 if (radius_msg_verify(msg, (const u8 *) client->shared_secret, 1733 client->shared_secret_len, 1734 client->pending_dac_disconnect_req, 0)) { 1735 RADIUS_DEBUG("Ignore Disconnect response with invalid authenticator"); 1736 radius_msg_free(msg); 1737 return; 1738 } 1739 1740 RADIUS_DEBUG("Disconnect-%s received for " MACSTR, 1741 ack ? "ACK" : "NAK", 1742 MAC2STR(client->pending_dac_disconnect_addr)); 1743 1744 radius_msg_free(msg); 1745 radius_msg_free(client->pending_dac_disconnect_req); 1746 client->pending_dac_disconnect_req = NULL; 1747 } 1748 1749 1750 static void radius_server_receive_coa_resp(struct radius_server_data *data, 1751 struct radius_client *client, 1752 struct radius_msg *msg, int ack) 1753 { 1754 struct radius_hdr *hdr; 1755 #ifdef CONFIG_SQLITE 1756 char addrtxt[3 * ETH_ALEN]; 1757 char *sql; 1758 int res; 1759 #endif /* CONFIG_SQLITE */ 1760 1761 if (!client->pending_dac_coa_req) { 1762 RADIUS_DEBUG("Ignore unexpected CoA response"); 1763 radius_msg_free(msg); 1764 return; 1765 } 1766 1767 hdr = radius_msg_get_hdr(msg); 1768 if (hdr->identifier != client->pending_dac_coa_id) { 1769 RADIUS_DEBUG("Ignore unexpected CoA response with unexpected identifier %u (expected %u)", 1770 hdr->identifier, 1771 client->pending_dac_coa_id); 1772 radius_msg_free(msg); 1773 return; 1774 } 1775 1776 if (radius_msg_verify(msg, (const u8 *) client->shared_secret, 1777 client->shared_secret_len, 1778 client->pending_dac_coa_req, 0)) { 1779 RADIUS_DEBUG("Ignore CoA response with invalid authenticator"); 1780 radius_msg_free(msg); 1781 return; 1782 } 1783 1784 RADIUS_DEBUG("CoA-%s received for " MACSTR, 1785 ack ? "ACK" : "NAK", 1786 MAC2STR(client->pending_dac_coa_addr)); 1787 1788 radius_msg_free(msg); 1789 radius_msg_free(client->pending_dac_coa_req); 1790 client->pending_dac_coa_req = NULL; 1791 1792 #ifdef CONFIG_SQLITE 1793 if (!data->db) 1794 return; 1795 1796 os_snprintf(addrtxt, sizeof(addrtxt), MACSTR, 1797 MAC2STR(client->pending_dac_coa_addr)); 1798 1799 if (ack) { 1800 sql = sqlite3_mprintf("UPDATE current_sessions SET hs20_t_c_filtering=0, waiting_coa_ack=0, coa_ack_received=1 WHERE mac_addr=%Q", 1801 addrtxt); 1802 } else { 1803 sql = sqlite3_mprintf("UPDATE current_sessions SET waiting_coa_ack=0 WHERE mac_addr=%Q", 1804 addrtxt); 1805 } 1806 if (!sql) 1807 return; 1808 1809 res = sqlite3_exec(data->db, sql, NULL, NULL, NULL); 1810 sqlite3_free(sql); 1811 if (res != SQLITE_OK) { 1812 RADIUS_ERROR("Failed to update current_sessions entry: %s", 1813 sqlite3_errmsg(data->db)); 1814 return; 1815 } 1816 #endif /* CONFIG_SQLITE */ 1817 } 1818 1819 1820 static void radius_server_receive_auth(int sock, void *eloop_ctx, 1821 void *sock_ctx) 1822 { 1823 struct radius_server_data *data = eloop_ctx; 1824 u8 *buf = NULL; 1825 union { 1826 struct sockaddr_storage ss; 1827 struct sockaddr_in sin; 1828 #ifdef CONFIG_IPV6 1829 struct sockaddr_in6 sin6; 1830 #endif /* CONFIG_IPV6 */ 1831 } from; 1832 socklen_t fromlen; 1833 int len; 1834 struct radius_client *client = NULL; 1835 struct radius_msg *msg = NULL; 1836 char abuf[50]; 1837 int from_port = 0; 1838 1839 buf = os_malloc(RADIUS_MAX_MSG_LEN); 1840 if (buf == NULL) { 1841 goto fail; 1842 } 1843 1844 fromlen = sizeof(from); 1845 len = recvfrom(sock, buf, RADIUS_MAX_MSG_LEN, 0, 1846 (struct sockaddr *) &from.ss, &fromlen); 1847 if (len < 0) { 1848 wpa_printf(MSG_INFO, "recvfrom[radius_server]: %s", 1849 strerror(errno)); 1850 goto fail; 1851 } 1852 1853 #ifdef CONFIG_IPV6 1854 if (data->ipv6) { 1855 if (inet_ntop(AF_INET6, &from.sin6.sin6_addr, abuf, 1856 sizeof(abuf)) == NULL) 1857 abuf[0] = '\0'; 1858 from_port = ntohs(from.sin6.sin6_port); 1859 RADIUS_DEBUG("Received %d bytes from %s:%d", 1860 len, abuf, from_port); 1861 1862 client = radius_server_get_client(data, 1863 (struct in_addr *) 1864 &from.sin6.sin6_addr, 1); 1865 } 1866 #endif /* CONFIG_IPV6 */ 1867 1868 if (!data->ipv6) { 1869 os_strlcpy(abuf, inet_ntoa(from.sin.sin_addr), sizeof(abuf)); 1870 from_port = ntohs(from.sin.sin_port); 1871 RADIUS_DEBUG("Received %d bytes from %s:%d", 1872 len, abuf, from_port); 1873 1874 client = radius_server_get_client(data, &from.sin.sin_addr, 0); 1875 } 1876 1877 RADIUS_DUMP("Received data", buf, len); 1878 1879 if (client == NULL) { 1880 RADIUS_DEBUG("Unknown client %s - packet ignored", abuf); 1881 data->counters.invalid_requests++; 1882 goto fail; 1883 } 1884 1885 msg = radius_msg_parse(buf, len); 1886 if (msg == NULL) { 1887 RADIUS_DEBUG("Parsing incoming RADIUS frame failed"); 1888 data->counters.malformed_access_requests++; 1889 client->counters.malformed_access_requests++; 1890 goto fail; 1891 } 1892 1893 os_free(buf); 1894 buf = NULL; 1895 1896 if (wpa_debug_level <= MSG_MSGDUMP) { 1897 radius_msg_dump(msg); 1898 } 1899 1900 if (radius_msg_get_hdr(msg)->code == RADIUS_CODE_DISCONNECT_ACK) { 1901 radius_server_receive_disconnect_resp(data, client, msg, 1); 1902 return; 1903 } 1904 1905 if (radius_msg_get_hdr(msg)->code == RADIUS_CODE_DISCONNECT_NAK) { 1906 radius_server_receive_disconnect_resp(data, client, msg, 0); 1907 return; 1908 } 1909 1910 if (radius_msg_get_hdr(msg)->code == RADIUS_CODE_COA_ACK) { 1911 radius_server_receive_coa_resp(data, client, msg, 1); 1912 return; 1913 } 1914 1915 if (radius_msg_get_hdr(msg)->code == RADIUS_CODE_COA_NAK) { 1916 radius_server_receive_coa_resp(data, client, msg, 0); 1917 return; 1918 } 1919 1920 if (radius_msg_get_hdr(msg)->code != RADIUS_CODE_ACCESS_REQUEST) { 1921 RADIUS_DEBUG("Unexpected RADIUS code %d", 1922 radius_msg_get_hdr(msg)->code); 1923 data->counters.unknown_types++; 1924 client->counters.unknown_types++; 1925 goto fail; 1926 } 1927 1928 data->counters.access_requests++; 1929 client->counters.access_requests++; 1930 1931 if (radius_msg_verify_msg_auth(msg, (u8 *) client->shared_secret, 1932 client->shared_secret_len, NULL)) { 1933 RADIUS_DEBUG("Invalid Message-Authenticator from %s", abuf); 1934 data->counters.bad_authenticators++; 1935 client->counters.bad_authenticators++; 1936 goto fail; 1937 } 1938 1939 if (radius_server_request(data, msg, (struct sockaddr *) &from, 1940 fromlen, client, abuf, from_port, NULL) == 1941 -2) 1942 return; /* msg was stored with the session */ 1943 1944 fail: 1945 radius_msg_free(msg); 1946 os_free(buf); 1947 } 1948 1949 1950 static void radius_server_receive_acct(int sock, void *eloop_ctx, 1951 void *sock_ctx) 1952 { 1953 struct radius_server_data *data = eloop_ctx; 1954 u8 *buf = NULL; 1955 union { 1956 struct sockaddr_storage ss; 1957 struct sockaddr_in sin; 1958 #ifdef CONFIG_IPV6 1959 struct sockaddr_in6 sin6; 1960 #endif /* CONFIG_IPV6 */ 1961 } from; 1962 socklen_t fromlen; 1963 int len, res; 1964 struct radius_client *client = NULL; 1965 struct radius_msg *msg = NULL, *resp = NULL; 1966 char abuf[50]; 1967 int from_port = 0; 1968 struct radius_hdr *hdr; 1969 struct wpabuf *rbuf; 1970 1971 buf = os_malloc(RADIUS_MAX_MSG_LEN); 1972 if (buf == NULL) { 1973 goto fail; 1974 } 1975 1976 fromlen = sizeof(from); 1977 len = recvfrom(sock, buf, RADIUS_MAX_MSG_LEN, 0, 1978 (struct sockaddr *) &from.ss, &fromlen); 1979 if (len < 0) { 1980 wpa_printf(MSG_INFO, "recvfrom[radius_server]: %s", 1981 strerror(errno)); 1982 goto fail; 1983 } 1984 1985 #ifdef CONFIG_IPV6 1986 if (data->ipv6) { 1987 if (inet_ntop(AF_INET6, &from.sin6.sin6_addr, abuf, 1988 sizeof(abuf)) == NULL) 1989 abuf[0] = '\0'; 1990 from_port = ntohs(from.sin6.sin6_port); 1991 RADIUS_DEBUG("Received %d bytes from %s:%d", 1992 len, abuf, from_port); 1993 1994 client = radius_server_get_client(data, 1995 (struct in_addr *) 1996 &from.sin6.sin6_addr, 1); 1997 } 1998 #endif /* CONFIG_IPV6 */ 1999 2000 if (!data->ipv6) { 2001 os_strlcpy(abuf, inet_ntoa(from.sin.sin_addr), sizeof(abuf)); 2002 from_port = ntohs(from.sin.sin_port); 2003 RADIUS_DEBUG("Received %d bytes from %s:%d", 2004 len, abuf, from_port); 2005 2006 client = radius_server_get_client(data, &from.sin.sin_addr, 0); 2007 } 2008 2009 RADIUS_DUMP("Received data", buf, len); 2010 2011 if (client == NULL) { 2012 RADIUS_DEBUG("Unknown client %s - packet ignored", abuf); 2013 data->counters.invalid_acct_requests++; 2014 goto fail; 2015 } 2016 2017 msg = radius_msg_parse(buf, len); 2018 if (msg == NULL) { 2019 RADIUS_DEBUG("Parsing incoming RADIUS frame failed"); 2020 data->counters.malformed_acct_requests++; 2021 client->counters.malformed_acct_requests++; 2022 goto fail; 2023 } 2024 2025 os_free(buf); 2026 buf = NULL; 2027 2028 if (wpa_debug_level <= MSG_MSGDUMP) { 2029 radius_msg_dump(msg); 2030 } 2031 2032 if (radius_msg_get_hdr(msg)->code != RADIUS_CODE_ACCOUNTING_REQUEST) { 2033 RADIUS_DEBUG("Unexpected RADIUS code %d", 2034 radius_msg_get_hdr(msg)->code); 2035 data->counters.unknown_acct_types++; 2036 client->counters.unknown_acct_types++; 2037 goto fail; 2038 } 2039 2040 data->counters.acct_requests++; 2041 client->counters.acct_requests++; 2042 2043 if (radius_msg_verify_acct_req(msg, (u8 *) client->shared_secret, 2044 client->shared_secret_len)) { 2045 RADIUS_DEBUG("Invalid Authenticator from %s", abuf); 2046 data->counters.acct_bad_authenticators++; 2047 client->counters.acct_bad_authenticators++; 2048 goto fail; 2049 } 2050 2051 /* TODO: Write accounting information to a file or database */ 2052 2053 hdr = radius_msg_get_hdr(msg); 2054 2055 resp = radius_msg_new(RADIUS_CODE_ACCOUNTING_RESPONSE, hdr->identifier); 2056 if (resp == NULL) 2057 goto fail; 2058 2059 radius_msg_finish_acct_resp(resp, (u8 *) client->shared_secret, 2060 client->shared_secret_len, 2061 hdr->authenticator); 2062 2063 RADIUS_DEBUG("Reply to %s:%d", abuf, from_port); 2064 if (wpa_debug_level <= MSG_MSGDUMP) { 2065 radius_msg_dump(resp); 2066 } 2067 rbuf = radius_msg_get_buf(resp); 2068 data->counters.acct_responses++; 2069 client->counters.acct_responses++; 2070 res = sendto(data->acct_sock, wpabuf_head(rbuf), wpabuf_len(rbuf), 0, 2071 (struct sockaddr *) &from.ss, fromlen); 2072 if (res < 0) { 2073 wpa_printf(MSG_INFO, "sendto[RADIUS SRV]: %s", 2074 strerror(errno)); 2075 } 2076 2077 fail: 2078 radius_msg_free(resp); 2079 radius_msg_free(msg); 2080 os_free(buf); 2081 } 2082 2083 2084 static int radius_server_disable_pmtu_discovery(int s) 2085 { 2086 int r = -1; 2087 #if defined(IP_MTU_DISCOVER) && defined(IP_PMTUDISC_DONT) 2088 /* Turn off Path MTU discovery on IPv4/UDP sockets. */ 2089 int action = IP_PMTUDISC_DONT; 2090 r = setsockopt(s, IPPROTO_IP, IP_MTU_DISCOVER, &action, 2091 sizeof(action)); 2092 if (r == -1) 2093 wpa_printf(MSG_ERROR, "Failed to set IP_MTU_DISCOVER: " 2094 "%s", strerror(errno)); 2095 #endif 2096 return r; 2097 } 2098 2099 2100 static int radius_server_open_socket(int port) 2101 { 2102 int s; 2103 struct sockaddr_in addr; 2104 2105 s = socket(PF_INET, SOCK_DGRAM, 0); 2106 if (s < 0) { 2107 wpa_printf(MSG_INFO, "RADIUS: socket: %s", strerror(errno)); 2108 return -1; 2109 } 2110 2111 radius_server_disable_pmtu_discovery(s); 2112 2113 os_memset(&addr, 0, sizeof(addr)); 2114 addr.sin_family = AF_INET; 2115 addr.sin_port = htons(port); 2116 if (bind(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) { 2117 wpa_printf(MSG_INFO, "RADIUS: bind: %s", strerror(errno)); 2118 close(s); 2119 return -1; 2120 } 2121 2122 return s; 2123 } 2124 2125 2126 #ifdef CONFIG_IPV6 2127 static int radius_server_open_socket6(int port) 2128 { 2129 int s; 2130 struct sockaddr_in6 addr; 2131 2132 s = socket(PF_INET6, SOCK_DGRAM, 0); 2133 if (s < 0) { 2134 wpa_printf(MSG_INFO, "RADIUS: socket[IPv6]: %s", 2135 strerror(errno)); 2136 return -1; 2137 } 2138 2139 os_memset(&addr, 0, sizeof(addr)); 2140 addr.sin6_family = AF_INET6; 2141 os_memcpy(&addr.sin6_addr, &in6addr_any, sizeof(in6addr_any)); 2142 addr.sin6_port = htons(port); 2143 if (bind(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) { 2144 wpa_printf(MSG_INFO, "RADIUS: bind: %s", strerror(errno)); 2145 close(s); 2146 return -1; 2147 } 2148 2149 return s; 2150 } 2151 #endif /* CONFIG_IPV6 */ 2152 2153 2154 static void radius_server_free_sessions(struct radius_server_data *data, 2155 struct radius_session *sessions) 2156 { 2157 struct radius_session *session, *prev; 2158 2159 session = sessions; 2160 while (session) { 2161 prev = session; 2162 session = session->next; 2163 radius_server_session_free(data, prev); 2164 } 2165 } 2166 2167 2168 static void radius_server_free_clients(struct radius_server_data *data, 2169 struct radius_client *clients) 2170 { 2171 struct radius_client *client, *prev; 2172 2173 client = clients; 2174 while (client) { 2175 prev = client; 2176 client = client->next; 2177 2178 radius_server_free_sessions(data, prev->sessions); 2179 os_free(prev->shared_secret); 2180 radius_msg_free(prev->pending_dac_coa_req); 2181 radius_msg_free(prev->pending_dac_disconnect_req); 2182 os_free(prev); 2183 } 2184 } 2185 2186 2187 static struct radius_client * 2188 radius_server_read_clients(const char *client_file, int ipv6) 2189 { 2190 FILE *f; 2191 const int buf_size = 1024; 2192 char *buf, *pos; 2193 struct radius_client *clients, *tail, *entry; 2194 int line = 0, mask, failed = 0, i; 2195 struct in_addr addr; 2196 #ifdef CONFIG_IPV6 2197 struct in6_addr addr6; 2198 #endif /* CONFIG_IPV6 */ 2199 unsigned int val; 2200 2201 f = fopen(client_file, "r"); 2202 if (f == NULL) { 2203 RADIUS_ERROR("Could not open client file '%s'", client_file); 2204 return NULL; 2205 } 2206 2207 buf = os_malloc(buf_size); 2208 if (buf == NULL) { 2209 fclose(f); 2210 return NULL; 2211 } 2212 2213 clients = tail = NULL; 2214 while (fgets(buf, buf_size, f)) { 2215 /* Configuration file format: 2216 * 192.168.1.0/24 secret 2217 * 192.168.1.2 secret 2218 * fe80::211:22ff:fe33:4455/64 secretipv6 2219 */ 2220 line++; 2221 buf[buf_size - 1] = '\0'; 2222 pos = buf; 2223 while (*pos != '\0' && *pos != '\n') 2224 pos++; 2225 if (*pos == '\n') 2226 *pos = '\0'; 2227 if (*buf == '\0' || *buf == '#') 2228 continue; 2229 2230 pos = buf; 2231 while ((*pos >= '0' && *pos <= '9') || *pos == '.' || 2232 (*pos >= 'a' && *pos <= 'f') || *pos == ':' || 2233 (*pos >= 'A' && *pos <= 'F')) { 2234 pos++; 2235 } 2236 2237 if (*pos == '\0') { 2238 failed = 1; 2239 break; 2240 } 2241 2242 if (*pos == '/') { 2243 char *end; 2244 *pos++ = '\0'; 2245 mask = strtol(pos, &end, 10); 2246 if ((pos == end) || 2247 (mask < 0 || mask > (ipv6 ? 128 : 32))) { 2248 failed = 1; 2249 break; 2250 } 2251 pos = end; 2252 } else { 2253 mask = ipv6 ? 128 : 32; 2254 *pos++ = '\0'; 2255 } 2256 2257 if (!ipv6 && inet_aton(buf, &addr) == 0) { 2258 failed = 1; 2259 break; 2260 } 2261 #ifdef CONFIG_IPV6 2262 if (ipv6 && inet_pton(AF_INET6, buf, &addr6) <= 0) { 2263 if (inet_pton(AF_INET, buf, &addr) <= 0) { 2264 failed = 1; 2265 break; 2266 } 2267 /* Convert IPv4 address to IPv6 */ 2268 if (mask <= 32) 2269 mask += (128 - 32); 2270 os_memset(addr6.s6_addr, 0, 10); 2271 addr6.s6_addr[10] = 0xff; 2272 addr6.s6_addr[11] = 0xff; 2273 os_memcpy(addr6.s6_addr + 12, (char *) &addr.s_addr, 2274 4); 2275 } 2276 #endif /* CONFIG_IPV6 */ 2277 2278 while (*pos == ' ' || *pos == '\t') { 2279 pos++; 2280 } 2281 2282 if (*pos == '\0') { 2283 failed = 1; 2284 break; 2285 } 2286 2287 entry = os_zalloc(sizeof(*entry)); 2288 if (entry == NULL) { 2289 failed = 1; 2290 break; 2291 } 2292 entry->shared_secret = os_strdup(pos); 2293 if (entry->shared_secret == NULL) { 2294 failed = 1; 2295 os_free(entry); 2296 break; 2297 } 2298 entry->shared_secret_len = os_strlen(entry->shared_secret); 2299 if (!ipv6) { 2300 entry->addr.s_addr = addr.s_addr; 2301 val = 0; 2302 for (i = 0; i < mask; i++) 2303 val |= 1U << (31 - i); 2304 entry->mask.s_addr = htonl(val); 2305 } 2306 #ifdef CONFIG_IPV6 2307 if (ipv6) { 2308 int offset = mask / 8; 2309 2310 os_memcpy(entry->addr6.s6_addr, addr6.s6_addr, 16); 2311 os_memset(entry->mask6.s6_addr, 0xff, offset); 2312 val = 0; 2313 for (i = 0; i < (mask % 8); i++) 2314 val |= 1 << (7 - i); 2315 if (offset < 16) 2316 entry->mask6.s6_addr[offset] = val; 2317 } 2318 #endif /* CONFIG_IPV6 */ 2319 2320 if (tail == NULL) { 2321 clients = tail = entry; 2322 } else { 2323 tail->next = entry; 2324 tail = entry; 2325 } 2326 } 2327 2328 if (failed) { 2329 RADIUS_ERROR("Invalid line %d in '%s'", line, client_file); 2330 radius_server_free_clients(NULL, clients); 2331 clients = NULL; 2332 } 2333 2334 os_free(buf); 2335 fclose(f); 2336 2337 return clients; 2338 } 2339 2340 2341 /** 2342 * radius_server_init - Initialize RADIUS server 2343 * @conf: Configuration for the RADIUS server 2344 * Returns: Pointer to private RADIUS server context or %NULL on failure 2345 * 2346 * This initializes a RADIUS server instance and returns a context pointer that 2347 * will be used in other calls to the RADIUS server module. The server can be 2348 * deinitialize by calling radius_server_deinit(). 2349 */ 2350 struct radius_server_data * 2351 radius_server_init(struct radius_server_conf *conf) 2352 { 2353 struct radius_server_data *data; 2354 2355 #ifndef CONFIG_IPV6 2356 if (conf->ipv6) { 2357 wpa_printf(MSG_ERROR, "RADIUS server compiled without IPv6 support"); 2358 return NULL; 2359 } 2360 #endif /* CONFIG_IPV6 */ 2361 2362 data = os_zalloc(sizeof(*data)); 2363 if (data == NULL) 2364 return NULL; 2365 2366 data->auth_sock = -1; 2367 data->acct_sock = -1; 2368 dl_list_init(&data->erp_keys); 2369 os_get_reltime(&data->start_time); 2370 data->conf_ctx = conf->conf_ctx; 2371 data->eap_sim_db_priv = conf->eap_sim_db_priv; 2372 data->ssl_ctx = conf->ssl_ctx; 2373 data->msg_ctx = conf->msg_ctx; 2374 data->ipv6 = conf->ipv6; 2375 if (conf->pac_opaque_encr_key) { 2376 data->pac_opaque_encr_key = os_malloc(16); 2377 if (data->pac_opaque_encr_key) { 2378 os_memcpy(data->pac_opaque_encr_key, 2379 conf->pac_opaque_encr_key, 16); 2380 } 2381 } 2382 if (conf->eap_fast_a_id) { 2383 data->eap_fast_a_id = os_malloc(conf->eap_fast_a_id_len); 2384 if (data->eap_fast_a_id) { 2385 os_memcpy(data->eap_fast_a_id, conf->eap_fast_a_id, 2386 conf->eap_fast_a_id_len); 2387 data->eap_fast_a_id_len = conf->eap_fast_a_id_len; 2388 } 2389 } 2390 if (conf->eap_fast_a_id_info) 2391 data->eap_fast_a_id_info = os_strdup(conf->eap_fast_a_id_info); 2392 data->eap_fast_prov = conf->eap_fast_prov; 2393 data->pac_key_lifetime = conf->pac_key_lifetime; 2394 data->pac_key_refresh_time = conf->pac_key_refresh_time; 2395 data->eap_teap_auth = conf->eap_teap_auth; 2396 data->eap_teap_pac_no_inner = conf->eap_teap_pac_no_inner; 2397 data->get_eap_user = conf->get_eap_user; 2398 data->eap_sim_aka_result_ind = conf->eap_sim_aka_result_ind; 2399 data->eap_sim_id = conf->eap_sim_id; 2400 data->tnc = conf->tnc; 2401 data->wps = conf->wps; 2402 data->pwd_group = conf->pwd_group; 2403 data->server_id = conf->server_id; 2404 if (conf->eap_req_id_text) { 2405 data->eap_req_id_text = os_malloc(conf->eap_req_id_text_len); 2406 if (data->eap_req_id_text) { 2407 os_memcpy(data->eap_req_id_text, conf->eap_req_id_text, 2408 conf->eap_req_id_text_len); 2409 data->eap_req_id_text_len = conf->eap_req_id_text_len; 2410 } 2411 } 2412 data->erp = conf->erp; 2413 data->erp_domain = conf->erp_domain; 2414 data->tls_session_lifetime = conf->tls_session_lifetime; 2415 data->tls_flags = conf->tls_flags; 2416 2417 if (conf->subscr_remediation_url) { 2418 data->subscr_remediation_url = 2419 os_strdup(conf->subscr_remediation_url); 2420 } 2421 data->subscr_remediation_method = conf->subscr_remediation_method; 2422 if (conf->hs20_sim_provisioning_url) 2423 data->hs20_sim_provisioning_url = 2424 os_strdup(conf->hs20_sim_provisioning_url); 2425 2426 if (conf->t_c_server_url) 2427 data->t_c_server_url = os_strdup(conf->t_c_server_url); 2428 2429 #ifdef CONFIG_SQLITE 2430 if (conf->sqlite_file) { 2431 if (sqlite3_open(conf->sqlite_file, &data->db)) { 2432 RADIUS_ERROR("Could not open SQLite file '%s'", 2433 conf->sqlite_file); 2434 radius_server_deinit(data); 2435 return NULL; 2436 } 2437 } 2438 #endif /* CONFIG_SQLITE */ 2439 2440 #ifdef CONFIG_RADIUS_TEST 2441 if (conf->dump_msk_file) 2442 data->dump_msk_file = os_strdup(conf->dump_msk_file); 2443 #endif /* CONFIG_RADIUS_TEST */ 2444 2445 data->clients = radius_server_read_clients(conf->client_file, 2446 conf->ipv6); 2447 if (data->clients == NULL) { 2448 wpa_printf(MSG_ERROR, "No RADIUS clients configured"); 2449 radius_server_deinit(data); 2450 return NULL; 2451 } 2452 2453 #ifdef CONFIG_IPV6 2454 if (conf->ipv6) 2455 data->auth_sock = radius_server_open_socket6(conf->auth_port); 2456 else 2457 #endif /* CONFIG_IPV6 */ 2458 data->auth_sock = radius_server_open_socket(conf->auth_port); 2459 if (data->auth_sock < 0) { 2460 wpa_printf(MSG_ERROR, "Failed to open UDP socket for RADIUS authentication server"); 2461 radius_server_deinit(data); 2462 return NULL; 2463 } 2464 if (eloop_register_read_sock(data->auth_sock, 2465 radius_server_receive_auth, 2466 data, NULL)) { 2467 radius_server_deinit(data); 2468 return NULL; 2469 } 2470 2471 if (conf->acct_port) { 2472 #ifdef CONFIG_IPV6 2473 if (conf->ipv6) 2474 data->acct_sock = radius_server_open_socket6( 2475 conf->acct_port); 2476 else 2477 #endif /* CONFIG_IPV6 */ 2478 data->acct_sock = radius_server_open_socket(conf->acct_port); 2479 if (data->acct_sock < 0) { 2480 wpa_printf(MSG_ERROR, "Failed to open UDP socket for RADIUS accounting server"); 2481 radius_server_deinit(data); 2482 return NULL; 2483 } 2484 if (eloop_register_read_sock(data->acct_sock, 2485 radius_server_receive_acct, 2486 data, NULL)) { 2487 radius_server_deinit(data); 2488 return NULL; 2489 } 2490 } else { 2491 data->acct_sock = -1; 2492 } 2493 2494 return data; 2495 } 2496 2497 2498 /** 2499 * radius_server_erp_flush - Flush all ERP keys 2500 * @data: RADIUS server context from radius_server_init() 2501 */ 2502 void radius_server_erp_flush(struct radius_server_data *data) 2503 { 2504 struct eap_server_erp_key *erp; 2505 2506 if (data == NULL) 2507 return; 2508 while ((erp = dl_list_first(&data->erp_keys, struct eap_server_erp_key, 2509 list)) != NULL) { 2510 dl_list_del(&erp->list); 2511 bin_clear_free(erp, sizeof(*erp)); 2512 } 2513 } 2514 2515 2516 /** 2517 * radius_server_deinit - Deinitialize RADIUS server 2518 * @data: RADIUS server context from radius_server_init() 2519 */ 2520 void radius_server_deinit(struct radius_server_data *data) 2521 { 2522 if (data == NULL) 2523 return; 2524 2525 if (data->auth_sock >= 0) { 2526 eloop_unregister_read_sock(data->auth_sock); 2527 close(data->auth_sock); 2528 } 2529 2530 if (data->acct_sock >= 0) { 2531 eloop_unregister_read_sock(data->acct_sock); 2532 close(data->acct_sock); 2533 } 2534 2535 radius_server_free_clients(data, data->clients); 2536 2537 os_free(data->pac_opaque_encr_key); 2538 os_free(data->eap_fast_a_id); 2539 os_free(data->eap_fast_a_id_info); 2540 os_free(data->eap_req_id_text); 2541 #ifdef CONFIG_RADIUS_TEST 2542 os_free(data->dump_msk_file); 2543 #endif /* CONFIG_RADIUS_TEST */ 2544 os_free(data->subscr_remediation_url); 2545 os_free(data->hs20_sim_provisioning_url); 2546 os_free(data->t_c_server_url); 2547 2548 #ifdef CONFIG_SQLITE 2549 if (data->db) 2550 sqlite3_close(data->db); 2551 #endif /* CONFIG_SQLITE */ 2552 2553 radius_server_erp_flush(data); 2554 2555 os_free(data); 2556 } 2557 2558 2559 /** 2560 * radius_server_get_mib - Get RADIUS server MIB information 2561 * @data: RADIUS server context from radius_server_init() 2562 * @buf: Buffer for returning the MIB data in text format 2563 * @buflen: buf length in octets 2564 * Returns: Number of octets written into buf 2565 */ 2566 int radius_server_get_mib(struct radius_server_data *data, char *buf, 2567 size_t buflen) 2568 { 2569 int ret, uptime; 2570 unsigned int idx; 2571 char *end, *pos; 2572 struct os_reltime now; 2573 struct radius_client *cli; 2574 2575 /* RFC 2619 - RADIUS Authentication Server MIB */ 2576 2577 if (data == NULL || buflen == 0) 2578 return 0; 2579 2580 pos = buf; 2581 end = buf + buflen; 2582 2583 os_get_reltime(&now); 2584 uptime = (now.sec - data->start_time.sec) * 100 + 2585 ((now.usec - data->start_time.usec) / 10000) % 100; 2586 ret = os_snprintf(pos, end - pos, 2587 "RADIUS-AUTH-SERVER-MIB\n" 2588 "radiusAuthServIdent=hostapd\n" 2589 "radiusAuthServUpTime=%d\n" 2590 "radiusAuthServResetTime=0\n" 2591 "radiusAuthServConfigReset=4\n", 2592 uptime); 2593 if (os_snprintf_error(end - pos, ret)) { 2594 *pos = '\0'; 2595 return pos - buf; 2596 } 2597 pos += ret; 2598 2599 ret = os_snprintf(pos, end - pos, 2600 "radiusAuthServTotalAccessRequests=%u\n" 2601 "radiusAuthServTotalInvalidRequests=%u\n" 2602 "radiusAuthServTotalDupAccessRequests=%u\n" 2603 "radiusAuthServTotalAccessAccepts=%u\n" 2604 "radiusAuthServTotalAccessRejects=%u\n" 2605 "radiusAuthServTotalAccessChallenges=%u\n" 2606 "radiusAuthServTotalMalformedAccessRequests=%u\n" 2607 "radiusAuthServTotalBadAuthenticators=%u\n" 2608 "radiusAuthServTotalPacketsDropped=%u\n" 2609 "radiusAuthServTotalUnknownTypes=%u\n" 2610 "radiusAccServTotalRequests=%u\n" 2611 "radiusAccServTotalInvalidRequests=%u\n" 2612 "radiusAccServTotalResponses=%u\n" 2613 "radiusAccServTotalMalformedRequests=%u\n" 2614 "radiusAccServTotalBadAuthenticators=%u\n" 2615 "radiusAccServTotalUnknownTypes=%u\n", 2616 data->counters.access_requests, 2617 data->counters.invalid_requests, 2618 data->counters.dup_access_requests, 2619 data->counters.access_accepts, 2620 data->counters.access_rejects, 2621 data->counters.access_challenges, 2622 data->counters.malformed_access_requests, 2623 data->counters.bad_authenticators, 2624 data->counters.packets_dropped, 2625 data->counters.unknown_types, 2626 data->counters.acct_requests, 2627 data->counters.invalid_acct_requests, 2628 data->counters.acct_responses, 2629 data->counters.malformed_acct_requests, 2630 data->counters.acct_bad_authenticators, 2631 data->counters.unknown_acct_types); 2632 if (os_snprintf_error(end - pos, ret)) { 2633 *pos = '\0'; 2634 return pos - buf; 2635 } 2636 pos += ret; 2637 2638 for (cli = data->clients, idx = 0; cli; cli = cli->next, idx++) { 2639 char abuf[50], mbuf[50]; 2640 #ifdef CONFIG_IPV6 2641 if (data->ipv6) { 2642 if (inet_ntop(AF_INET6, &cli->addr6, abuf, 2643 sizeof(abuf)) == NULL) 2644 abuf[0] = '\0'; 2645 if (inet_ntop(AF_INET6, &cli->mask6, mbuf, 2646 sizeof(mbuf)) == NULL) 2647 mbuf[0] = '\0'; 2648 } 2649 #endif /* CONFIG_IPV6 */ 2650 if (!data->ipv6) { 2651 os_strlcpy(abuf, inet_ntoa(cli->addr), sizeof(abuf)); 2652 os_strlcpy(mbuf, inet_ntoa(cli->mask), sizeof(mbuf)); 2653 } 2654 2655 ret = os_snprintf(pos, end - pos, 2656 "radiusAuthClientIndex=%u\n" 2657 "radiusAuthClientAddress=%s/%s\n" 2658 "radiusAuthServAccessRequests=%u\n" 2659 "radiusAuthServDupAccessRequests=%u\n" 2660 "radiusAuthServAccessAccepts=%u\n" 2661 "radiusAuthServAccessRejects=%u\n" 2662 "radiusAuthServAccessChallenges=%u\n" 2663 "radiusAuthServMalformedAccessRequests=%u\n" 2664 "radiusAuthServBadAuthenticators=%u\n" 2665 "radiusAuthServPacketsDropped=%u\n" 2666 "radiusAuthServUnknownTypes=%u\n" 2667 "radiusAccServTotalRequests=%u\n" 2668 "radiusAccServTotalInvalidRequests=%u\n" 2669 "radiusAccServTotalResponses=%u\n" 2670 "radiusAccServTotalMalformedRequests=%u\n" 2671 "radiusAccServTotalBadAuthenticators=%u\n" 2672 "radiusAccServTotalUnknownTypes=%u\n", 2673 idx, 2674 abuf, mbuf, 2675 cli->counters.access_requests, 2676 cli->counters.dup_access_requests, 2677 cli->counters.access_accepts, 2678 cli->counters.access_rejects, 2679 cli->counters.access_challenges, 2680 cli->counters.malformed_access_requests, 2681 cli->counters.bad_authenticators, 2682 cli->counters.packets_dropped, 2683 cli->counters.unknown_types, 2684 cli->counters.acct_requests, 2685 cli->counters.invalid_acct_requests, 2686 cli->counters.acct_responses, 2687 cli->counters.malformed_acct_requests, 2688 cli->counters.acct_bad_authenticators, 2689 cli->counters.unknown_acct_types); 2690 if (os_snprintf_error(end - pos, ret)) { 2691 *pos = '\0'; 2692 return pos - buf; 2693 } 2694 pos += ret; 2695 } 2696 2697 return pos - buf; 2698 } 2699 2700 2701 static int radius_server_get_eap_user(void *ctx, const u8 *identity, 2702 size_t identity_len, int phase2, 2703 struct eap_user *user) 2704 { 2705 struct radius_session *sess = ctx; 2706 struct radius_server_data *data = sess->server; 2707 int ret; 2708 2709 ret = data->get_eap_user(data->conf_ctx, identity, identity_len, 2710 phase2, user); 2711 if (ret == 0 && user) { 2712 sess->accept_attr = user->accept_attr; 2713 sess->remediation = user->remediation; 2714 sess->macacl = user->macacl; 2715 sess->t_c_timestamp = user->t_c_timestamp; 2716 } 2717 2718 if (ret) { 2719 RADIUS_DEBUG("%s: User-Name not found from user database", 2720 __func__); 2721 } 2722 2723 return ret; 2724 } 2725 2726 2727 static const char * radius_server_get_eap_req_id_text(void *ctx, size_t *len) 2728 { 2729 struct radius_session *sess = ctx; 2730 struct radius_server_data *data = sess->server; 2731 *len = data->eap_req_id_text_len; 2732 return data->eap_req_id_text; 2733 } 2734 2735 2736 static void radius_server_log_msg(void *ctx, const char *msg) 2737 { 2738 struct radius_session *sess = ctx; 2739 srv_log(sess, "EAP: %s", msg); 2740 } 2741 2742 2743 #ifdef CONFIG_ERP 2744 2745 static const char * radius_server_get_erp_domain(void *ctx) 2746 { 2747 struct radius_session *sess = ctx; 2748 struct radius_server_data *data = sess->server; 2749 2750 return data->erp_domain; 2751 } 2752 2753 2754 static struct eap_server_erp_key * 2755 radius_server_erp_get_key(void *ctx, const char *keyname) 2756 { 2757 struct radius_session *sess = ctx; 2758 struct radius_server_data *data = sess->server; 2759 2760 return radius_server_erp_find_key(data, keyname); 2761 } 2762 2763 2764 static int radius_server_erp_add_key(void *ctx, struct eap_server_erp_key *erp) 2765 { 2766 struct radius_session *sess = ctx; 2767 struct radius_server_data *data = sess->server; 2768 2769 dl_list_add(&data->erp_keys, &erp->list); 2770 return 0; 2771 } 2772 2773 #endif /* CONFIG_ERP */ 2774 2775 2776 static const struct eapol_callbacks radius_server_eapol_cb = 2777 { 2778 .get_eap_user = radius_server_get_eap_user, 2779 .get_eap_req_id_text = radius_server_get_eap_req_id_text, 2780 .log_msg = radius_server_log_msg, 2781 #ifdef CONFIG_ERP 2782 .get_erp_send_reauth_start = NULL, 2783 .get_erp_domain = radius_server_get_erp_domain, 2784 .erp_get_key = radius_server_erp_get_key, 2785 .erp_add_key = radius_server_erp_add_key, 2786 #endif /* CONFIG_ERP */ 2787 }; 2788 2789 2790 /** 2791 * radius_server_eap_pending_cb - Pending EAP data notification 2792 * @data: RADIUS server context from radius_server_init() 2793 * @ctx: Pending EAP context pointer 2794 * 2795 * This function is used to notify EAP server module that a pending operation 2796 * has been completed and processing of the EAP session can proceed. 2797 */ 2798 void radius_server_eap_pending_cb(struct radius_server_data *data, void *ctx) 2799 { 2800 struct radius_client *cli; 2801 struct radius_session *s, *sess = NULL; 2802 struct radius_msg *msg; 2803 2804 if (data == NULL) 2805 return; 2806 2807 for (cli = data->clients; cli; cli = cli->next) { 2808 for (s = cli->sessions; s; s = s->next) { 2809 if (s->eap == ctx && s->last_msg) { 2810 sess = s; 2811 break; 2812 } 2813 } 2814 if (sess) 2815 break; 2816 } 2817 2818 if (sess == NULL) { 2819 RADIUS_DEBUG("No session matched callback ctx"); 2820 return; 2821 } 2822 2823 msg = sess->last_msg; 2824 sess->last_msg = NULL; 2825 eap_sm_pending_cb(sess->eap); 2826 if (radius_server_request(data, msg, 2827 (struct sockaddr *) &sess->last_from, 2828 sess->last_fromlen, cli, 2829 sess->last_from_addr, 2830 sess->last_from_port, sess) == -2) 2831 return; /* msg was stored with the session */ 2832 2833 radius_msg_free(msg); 2834 } 2835 2836 2837 #ifdef CONFIG_SQLITE 2838 2839 struct db_session_fields { 2840 char *identity; 2841 char *nas; 2842 int hs20_t_c_filtering; 2843 int waiting_coa_ack; 2844 int coa_ack_received; 2845 }; 2846 2847 2848 static int get_db_session_fields(void *ctx, int argc, char *argv[], char *col[]) 2849 { 2850 struct db_session_fields *fields = ctx; 2851 int i; 2852 2853 for (i = 0; i < argc; i++) { 2854 if (!argv[i]) 2855 continue; 2856 2857 RADIUS_DEBUG("Session DB: %s=%s", col[i], argv[i]); 2858 2859 if (os_strcmp(col[i], "identity") == 0) { 2860 os_free(fields->identity); 2861 fields->identity = os_strdup(argv[i]); 2862 } else if (os_strcmp(col[i], "nas") == 0) { 2863 os_free(fields->nas); 2864 fields->nas = os_strdup(argv[i]); 2865 } else if (os_strcmp(col[i], "hs20_t_c_filtering") == 0) { 2866 fields->hs20_t_c_filtering = atoi(argv[i]); 2867 } else if (os_strcmp(col[i], "waiting_coa_ack") == 0) { 2868 fields->waiting_coa_ack = atoi(argv[i]); 2869 } else if (os_strcmp(col[i], "coa_ack_received") == 0) { 2870 fields->coa_ack_received = atoi(argv[i]); 2871 } 2872 } 2873 2874 return 0; 2875 } 2876 2877 2878 static void free_db_session_fields(struct db_session_fields *fields) 2879 { 2880 os_free(fields->identity); 2881 fields->identity = NULL; 2882 os_free(fields->nas); 2883 fields->nas = NULL; 2884 } 2885 2886 #endif /* CONFIG_SQLITE */ 2887 2888 2889 int radius_server_dac_request(struct radius_server_data *data, const char *req) 2890 { 2891 #ifdef CONFIG_SQLITE 2892 char *sql; 2893 int res; 2894 int disconnect; 2895 const char *pos = req; 2896 u8 addr[ETH_ALEN]; 2897 char addrtxt[3 * ETH_ALEN]; 2898 int t_c_clear = 0; 2899 struct db_session_fields fields; 2900 struct sockaddr_in das; 2901 struct radius_client *client; 2902 struct radius_msg *msg; 2903 struct wpabuf *buf; 2904 u8 identifier; 2905 struct os_time now; 2906 2907 if (!data) 2908 return -1; 2909 2910 /* req: <disconnect|coa> <MAC Address> [t_c_clear] */ 2911 2912 if (os_strncmp(pos, "disconnect ", 11) == 0) { 2913 disconnect = 1; 2914 pos += 11; 2915 } else if (os_strncmp(req, "coa ", 4) == 0) { 2916 disconnect = 0; 2917 pos += 4; 2918 } else { 2919 return -1; 2920 } 2921 2922 if (hwaddr_aton(pos, addr)) 2923 return -1; 2924 pos = os_strchr(pos, ' '); 2925 if (pos) { 2926 if (os_strstr(pos, "t_c_clear")) 2927 t_c_clear = 1; 2928 } 2929 2930 if (!disconnect && !t_c_clear) { 2931 RADIUS_ERROR("DAC request for CoA without any authorization change"); 2932 return -1; 2933 } 2934 2935 if (!data->db) { 2936 RADIUS_ERROR("SQLite database not in use"); 2937 return -1; 2938 } 2939 2940 os_snprintf(addrtxt, sizeof(addrtxt), MACSTR, MAC2STR(addr)); 2941 2942 sql = sqlite3_mprintf("SELECT * FROM current_sessions WHERE mac_addr=%Q", 2943 addrtxt); 2944 if (!sql) 2945 return -1; 2946 2947 os_memset(&fields, 0, sizeof(fields)); 2948 res = sqlite3_exec(data->db, sql, get_db_session_fields, &fields, NULL); 2949 sqlite3_free(sql); 2950 if (res != SQLITE_OK) { 2951 RADIUS_ERROR("Failed to find matching current_sessions entry from sqlite database: %s", 2952 sqlite3_errmsg(data->db)); 2953 free_db_session_fields(&fields); 2954 return -1; 2955 } 2956 2957 if (!fields.nas) { 2958 RADIUS_ERROR("No NAS information found from current_sessions"); 2959 free_db_session_fields(&fields); 2960 return -1; 2961 } 2962 2963 os_memset(&das, 0, sizeof(das)); 2964 das.sin_family = AF_INET; 2965 das.sin_addr.s_addr = inet_addr(fields.nas); 2966 das.sin_port = htons(3799); 2967 2968 free_db_session_fields(&fields); 2969 2970 client = radius_server_get_client(data, &das.sin_addr, 0); 2971 if (!client) { 2972 RADIUS_ERROR("No NAS information available to protect the packet"); 2973 return -1; 2974 } 2975 2976 identifier = client->next_dac_identifier++; 2977 2978 msg = radius_msg_new(disconnect ? RADIUS_CODE_DISCONNECT_REQUEST : 2979 RADIUS_CODE_COA_REQUEST, identifier); 2980 if (!msg) 2981 return -1; 2982 2983 os_snprintf(addrtxt, sizeof(addrtxt), RADIUS_802_1X_ADDR_FORMAT, 2984 MAC2STR(addr)); 2985 if (!radius_msg_add_attr(msg, RADIUS_ATTR_CALLING_STATION_ID, 2986 (u8 *) addrtxt, os_strlen(addrtxt))) { 2987 RADIUS_ERROR("Could not add Calling-Station-Id"); 2988 radius_msg_free(msg); 2989 return -1; 2990 } 2991 2992 if (!disconnect && t_c_clear) { 2993 u8 val[4] = { 0x00, 0x00, 0x00, 0x00 }; /* E=0 */ 2994 2995 if (!radius_msg_add_wfa( 2996 msg, RADIUS_VENDOR_ATTR_WFA_HS20_T_C_FILTERING, 2997 val, sizeof(val))) { 2998 RADIUS_DEBUG("Failed to add WFA-HS20-T-C-Filtering"); 2999 radius_msg_free(msg); 3000 return -1; 3001 } 3002 } 3003 3004 os_get_time(&now); 3005 if (!radius_msg_add_attr_int32(msg, RADIUS_ATTR_EVENT_TIMESTAMP, 3006 now.sec)) { 3007 RADIUS_ERROR("Failed to add Event-Timestamp attribute"); 3008 radius_msg_free(msg); 3009 return -1; 3010 } 3011 3012 radius_msg_finish_acct(msg, (u8 *) client->shared_secret, 3013 client->shared_secret_len); 3014 3015 if (wpa_debug_level <= MSG_MSGDUMP) 3016 radius_msg_dump(msg); 3017 3018 buf = radius_msg_get_buf(msg); 3019 if (sendto(data->auth_sock, wpabuf_head(buf), wpabuf_len(buf), 0, 3020 (struct sockaddr *) &das, sizeof(das)) < 0) { 3021 RADIUS_ERROR("Failed to send packet - sendto: %s", 3022 strerror(errno)); 3023 radius_msg_free(msg); 3024 return -1; 3025 } 3026 3027 if (disconnect) { 3028 radius_msg_free(client->pending_dac_disconnect_req); 3029 client->pending_dac_disconnect_req = msg; 3030 client->pending_dac_disconnect_id = identifier; 3031 os_memcpy(client->pending_dac_disconnect_addr, addr, ETH_ALEN); 3032 } else { 3033 radius_msg_free(client->pending_dac_coa_req); 3034 client->pending_dac_coa_req = msg; 3035 client->pending_dac_coa_id = identifier; 3036 os_memcpy(client->pending_dac_coa_addr, addr, ETH_ALEN); 3037 } 3038 3039 return 0; 3040 #else /* CONFIG_SQLITE */ 3041 return -1; 3042 #endif /* CONFIG_SQLITE */ 3043 } 3044