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