eap_sim.c revision 051af73b8f8014eff33330aead0f36944b3403e6
1/* 2 * EAP peer method: EAP-SIM (RFC 4186) 3 * Copyright (c) 2004-2012, Jouni Malinen <j@w1.fi> 4 * 5 * This software may be distributed under the terms of the BSD license. 6 * See README for more details. 7 */ 8 9#include "includes.h" 10 11#include "common.h" 12#include "pcsc_funcs.h" 13#include "crypto/milenage.h" 14#include "crypto/random.h" 15#include "eap_peer/eap_i.h" 16#include "eap_config.h" 17#include "eap_common/eap_sim_common.h" 18 19 20struct eap_sim_data { 21 u8 *ver_list; 22 size_t ver_list_len; 23 int selected_version; 24 size_t min_num_chal, num_chal; 25 26 u8 kc[3][EAP_SIM_KC_LEN]; 27 u8 sres[3][EAP_SIM_SRES_LEN]; 28 u8 nonce_mt[EAP_SIM_NONCE_MT_LEN], nonce_s[EAP_SIM_NONCE_S_LEN]; 29 u8 mk[EAP_SIM_MK_LEN]; 30 u8 k_aut[EAP_SIM_K_AUT_LEN]; 31 u8 k_encr[EAP_SIM_K_ENCR_LEN]; 32 u8 msk[EAP_SIM_KEYING_DATA_LEN]; 33 u8 emsk[EAP_EMSK_LEN]; 34 u8 rand[3][GSM_RAND_LEN]; 35 36 int num_id_req, num_notification; 37 u8 *pseudonym; 38 size_t pseudonym_len; 39 u8 *reauth_id; 40 size_t reauth_id_len; 41 int reauth; 42 unsigned int counter, counter_too_small; 43 u8 *last_eap_identity; 44 size_t last_eap_identity_len; 45 enum { 46 CONTINUE, RESULT_SUCCESS, RESULT_FAILURE, SUCCESS, FAILURE 47 } state; 48 int result_ind, use_result_ind; 49}; 50 51 52#ifndef CONFIG_NO_STDOUT_DEBUG 53static const char * eap_sim_state_txt(int state) 54{ 55 switch (state) { 56 case CONTINUE: 57 return "CONTINUE"; 58 case RESULT_SUCCESS: 59 return "RESULT_SUCCESS"; 60 case RESULT_FAILURE: 61 return "RESULT_FAILURE"; 62 case SUCCESS: 63 return "SUCCESS"; 64 case FAILURE: 65 return "FAILURE"; 66 default: 67 return "?"; 68 } 69} 70#endif /* CONFIG_NO_STDOUT_DEBUG */ 71 72 73static void eap_sim_state(struct eap_sim_data *data, int state) 74{ 75 wpa_printf(MSG_DEBUG, "EAP-SIM: %s -> %s", 76 eap_sim_state_txt(data->state), 77 eap_sim_state_txt(state)); 78 data->state = state; 79} 80 81 82static void * eap_sim_init(struct eap_sm *sm) 83{ 84 struct eap_sim_data *data; 85 struct eap_peer_config *config = eap_get_config(sm); 86 87 data = os_zalloc(sizeof(*data)); 88 if (data == NULL) 89 return NULL; 90 91 if (random_get_bytes(data->nonce_mt, EAP_SIM_NONCE_MT_LEN)) { 92 wpa_printf(MSG_WARNING, "EAP-SIM: Failed to get random data " 93 "for NONCE_MT"); 94 os_free(data); 95 return NULL; 96 } 97 98 data->min_num_chal = 2; 99 if (config && config->phase1) { 100 char *pos = os_strstr(config->phase1, "sim_min_num_chal="); 101 if (pos) { 102 data->min_num_chal = atoi(pos + 17); 103 if (data->min_num_chal < 2 || data->min_num_chal > 3) { 104 wpa_printf(MSG_WARNING, "EAP-SIM: Invalid " 105 "sim_min_num_chal configuration " 106 "(%lu, expected 2 or 3)", 107 (unsigned long) data->min_num_chal); 108 os_free(data); 109 return NULL; 110 } 111 wpa_printf(MSG_DEBUG, "EAP-SIM: Set minimum number of " 112 "challenges to %lu", 113 (unsigned long) data->min_num_chal); 114 } 115 116 data->result_ind = os_strstr(config->phase1, "result_ind=1") != 117 NULL; 118 } 119 120 if (config && config->anonymous_identity) { 121 data->pseudonym = os_malloc(config->anonymous_identity_len); 122 if (data->pseudonym) { 123 os_memcpy(data->pseudonym, config->anonymous_identity, 124 config->anonymous_identity_len); 125 data->pseudonym_len = config->anonymous_identity_len; 126 } 127 } 128 129 eap_sim_state(data, CONTINUE); 130 131 return data; 132} 133 134 135static void eap_sim_deinit(struct eap_sm *sm, void *priv) 136{ 137 struct eap_sim_data *data = priv; 138 if (data) { 139 os_free(data->ver_list); 140 os_free(data->pseudonym); 141 os_free(data->reauth_id); 142 os_free(data->last_eap_identity); 143 os_free(data); 144 } 145} 146 147 148static int eap_sim_ext_sim_req(struct eap_sm *sm, struct eap_sim_data *data) 149{ 150 char req[200], *pos, *end; 151 size_t i; 152 153 wpa_printf(MSG_DEBUG, "EAP-SIM: Use external SIM processing"); 154 pos = req; 155 end = pos + sizeof(req); 156 pos += os_snprintf(pos, end - pos, "GSM-AUTH"); 157 for (i = 0; i < data->num_chal; i++) { 158 pos += os_snprintf(pos, end - pos, ":"); 159 pos += wpa_snprintf_hex(pos, end - pos, data->rand[i], 160 GSM_RAND_LEN); 161 } 162 163 eap_sm_request_sim(sm, req); 164 return 1; 165} 166 167 168static int eap_sim_ext_sim_result(struct eap_sm *sm, struct eap_sim_data *data, 169 struct eap_peer_config *conf) 170{ 171 char *resp, *pos; 172 size_t i; 173 174 wpa_printf(MSG_DEBUG, 175 "EAP-SIM: Use result from external SIM processing"); 176 177 resp = conf->external_sim_resp; 178 conf->external_sim_resp = NULL; 179 180 if (os_strncmp(resp, "GSM-AUTH:", 9) != 0) { 181 wpa_printf(MSG_DEBUG, "EAP-SIM: Unrecognized external SIM processing response"); 182 os_free(resp); 183 return -1; 184 } 185 186 pos = resp + 9; 187 for (i = 0; i < data->num_chal; i++) { 188 wpa_hexdump(MSG_DEBUG, "EAP-SIM: RAND", 189 data->rand[i], GSM_RAND_LEN); 190 191 if (hexstr2bin(pos, data->kc[i], EAP_SIM_KC_LEN) < 0) 192 goto invalid; 193 wpa_hexdump_key(MSG_DEBUG, "EAP-SIM: Kc", 194 data->kc[i], EAP_SIM_KC_LEN); 195 pos += EAP_SIM_KC_LEN * 2; 196 if (*pos != ':') 197 goto invalid; 198 pos++; 199 200 if (hexstr2bin(pos, data->sres[i], EAP_SIM_SRES_LEN) < 0) 201 goto invalid; 202 wpa_hexdump_key(MSG_DEBUG, "EAP-SIM: SRES", 203 data->sres[i], EAP_SIM_SRES_LEN); 204 pos += EAP_SIM_SRES_LEN * 2; 205 if (i + 1 < data->num_chal) { 206 if (*pos != ':') 207 goto invalid; 208 pos++; 209 } 210 } 211 212 os_free(resp); 213 return 0; 214 215invalid: 216 wpa_printf(MSG_DEBUG, "EAP-SIM: Invalid external SIM processing GSM-AUTH response"); 217 os_free(resp); 218 return -1; 219} 220 221 222static int eap_sim_gsm_auth(struct eap_sm *sm, struct eap_sim_data *data) 223{ 224 struct eap_peer_config *conf; 225 226 wpa_printf(MSG_DEBUG, "EAP-SIM: GSM authentication algorithm"); 227 228 conf = eap_get_config(sm); 229 if (conf == NULL) 230 return -1; 231 232 if (sm->external_sim) { 233 if (conf->external_sim_resp) 234 return eap_sim_ext_sim_result(sm, data, conf); 235 else 236 return eap_sim_ext_sim_req(sm, data); 237 } 238 239 if (conf->pcsc) { 240 if (scard_gsm_auth(sm->scard_ctx, data->rand[0], 241 data->sres[0], data->kc[0]) || 242 scard_gsm_auth(sm->scard_ctx, data->rand[1], 243 data->sres[1], data->kc[1]) || 244 (data->num_chal > 2 && 245 scard_gsm_auth(sm->scard_ctx, data->rand[2], 246 data->sres[2], data->kc[2]))) { 247 wpa_printf(MSG_DEBUG, "EAP-SIM: GSM SIM " 248 "authentication could not be completed"); 249 return -1; 250 } 251 return 0; 252 } 253 254#ifdef CONFIG_SIM_SIMULATOR 255 if (conf->password) { 256 u8 opc[16], k[16]; 257 const char *pos; 258 size_t i; 259 wpa_printf(MSG_DEBUG, "EAP-SIM: Use internal GSM-Milenage " 260 "implementation for authentication"); 261 if (conf->password_len < 65) { 262 wpa_printf(MSG_DEBUG, "EAP-SIM: invalid GSM-Milenage " 263 "password"); 264 return -1; 265 } 266 pos = (const char *) conf->password; 267 if (hexstr2bin(pos, k, 16)) 268 return -1; 269 pos += 32; 270 if (*pos != ':') 271 return -1; 272 pos++; 273 274 if (hexstr2bin(pos, opc, 16)) 275 return -1; 276 277 for (i = 0; i < data->num_chal; i++) { 278 if (gsm_milenage(opc, k, data->rand[i], 279 data->sres[i], data->kc[i])) { 280 wpa_printf(MSG_DEBUG, "EAP-SIM: " 281 "GSM-Milenage authentication " 282 "could not be completed"); 283 return -1; 284 } 285 wpa_hexdump(MSG_DEBUG, "EAP-SIM: RAND", 286 data->rand[i], GSM_RAND_LEN); 287 wpa_hexdump_key(MSG_DEBUG, "EAP-SIM: SRES", 288 data->sres[i], EAP_SIM_SRES_LEN); 289 wpa_hexdump_key(MSG_DEBUG, "EAP-SIM: Kc", 290 data->kc[i], EAP_SIM_KC_LEN); 291 } 292 return 0; 293 } 294#endif /* CONFIG_SIM_SIMULATOR */ 295 296#ifdef CONFIG_SIM_HARDCODED 297 /* These hardcoded Kc and SRES values are used for testing. RAND to 298 * KC/SREC mapping is very bogus as far as real authentication is 299 * concerned, but it is quite useful for cases where the AS is rotating 300 * the order of pre-configured values. */ 301 { 302 size_t i; 303 304 wpa_printf(MSG_DEBUG, "EAP-SIM: Use hardcoded Kc and SRES " 305 "values for testing"); 306 307 for (i = 0; i < data->num_chal; i++) { 308 if (data->rand[i][0] == 0xaa) { 309 os_memcpy(data->kc[i], 310 "\xa0\xa1\xa2\xa3\xa4\xa5\xa6\xa7", 311 EAP_SIM_KC_LEN); 312 os_memcpy(data->sres[i], "\xd1\xd2\xd3\xd4", 313 EAP_SIM_SRES_LEN); 314 } else if (data->rand[i][0] == 0xbb) { 315 os_memcpy(data->kc[i], 316 "\xb0\xb1\xb2\xb3\xb4\xb5\xb6\xb7", 317 EAP_SIM_KC_LEN); 318 os_memcpy(data->sres[i], "\xe1\xe2\xe3\xe4", 319 EAP_SIM_SRES_LEN); 320 } else { 321 os_memcpy(data->kc[i], 322 "\xc0\xc1\xc2\xc3\xc4\xc5\xc6\xc7", 323 EAP_SIM_KC_LEN); 324 os_memcpy(data->sres[i], "\xf1\xf2\xf3\xf4", 325 EAP_SIM_SRES_LEN); 326 } 327 } 328 } 329 330 return 0; 331 332#else /* CONFIG_SIM_HARDCODED */ 333 334 wpa_printf(MSG_DEBUG, "EAP-SIM: No GSM authentication algorithm " 335 "enabled"); 336 return -1; 337 338#endif /* CONFIG_SIM_HARDCODED */ 339} 340 341 342static int eap_sim_supported_ver(int version) 343{ 344 return version == EAP_SIM_VERSION; 345} 346 347 348#define CLEAR_PSEUDONYM 0x01 349#define CLEAR_REAUTH_ID 0x02 350#define CLEAR_EAP_ID 0x04 351 352static void eap_sim_clear_identities(struct eap_sm *sm, 353 struct eap_sim_data *data, int id) 354{ 355 if ((id & CLEAR_PSEUDONYM) && data->pseudonym) { 356 wpa_printf(MSG_DEBUG, "EAP-SIM: forgetting old pseudonym"); 357 os_free(data->pseudonym); 358 data->pseudonym = NULL; 359 data->pseudonym_len = 0; 360 eap_set_anon_id(sm, NULL, 0); 361 } 362 if ((id & CLEAR_REAUTH_ID) && data->reauth_id) { 363 wpa_printf(MSG_DEBUG, "EAP-SIM: forgetting old reauth_id"); 364 os_free(data->reauth_id); 365 data->reauth_id = NULL; 366 data->reauth_id_len = 0; 367 } 368 if ((id & CLEAR_EAP_ID) && data->last_eap_identity) { 369 wpa_printf(MSG_DEBUG, "EAP-SIM: forgetting old eap_id"); 370 os_free(data->last_eap_identity); 371 data->last_eap_identity = NULL; 372 data->last_eap_identity_len = 0; 373 } 374} 375 376 377static int eap_sim_learn_ids(struct eap_sm *sm, struct eap_sim_data *data, 378 struct eap_sim_attrs *attr) 379{ 380 if (attr->next_pseudonym) { 381 const u8 *identity = NULL; 382 size_t identity_len = 0; 383 const u8 *realm = NULL; 384 size_t realm_len = 0; 385 386 wpa_hexdump_ascii(MSG_DEBUG, 387 "EAP-SIM: (encr) AT_NEXT_PSEUDONYM", 388 attr->next_pseudonym, 389 attr->next_pseudonym_len); 390 os_free(data->pseudonym); 391 /* Look for the realm of the permanent identity */ 392 identity = eap_get_config_identity(sm, &identity_len); 393 if (identity) { 394 for (realm = identity, realm_len = identity_len; 395 realm_len > 0; realm_len--, realm++) { 396 if (*realm == '@') 397 break; 398 } 399 } 400 data->pseudonym = os_malloc(attr->next_pseudonym_len + 401 realm_len); 402 if (data->pseudonym == NULL) { 403 wpa_printf(MSG_INFO, "EAP-SIM: (encr) No memory for " 404 "next pseudonym"); 405 data->pseudonym_len = 0; 406 return -1; 407 } 408 os_memcpy(data->pseudonym, attr->next_pseudonym, 409 attr->next_pseudonym_len); 410 if (realm_len) { 411 os_memcpy(data->pseudonym + attr->next_pseudonym_len, 412 realm, realm_len); 413 } 414 data->pseudonym_len = attr->next_pseudonym_len + realm_len; 415 eap_set_anon_id(sm, data->pseudonym, data->pseudonym_len); 416 } 417 418 if (attr->next_reauth_id) { 419 os_free(data->reauth_id); 420 data->reauth_id = os_malloc(attr->next_reauth_id_len); 421 if (data->reauth_id == NULL) { 422 wpa_printf(MSG_INFO, "EAP-SIM: (encr) No memory for " 423 "next reauth_id"); 424 data->reauth_id_len = 0; 425 return -1; 426 } 427 os_memcpy(data->reauth_id, attr->next_reauth_id, 428 attr->next_reauth_id_len); 429 data->reauth_id_len = attr->next_reauth_id_len; 430 wpa_hexdump_ascii(MSG_DEBUG, 431 "EAP-SIM: (encr) AT_NEXT_REAUTH_ID", 432 data->reauth_id, 433 data->reauth_id_len); 434 } 435 436 return 0; 437} 438 439 440static struct wpabuf * eap_sim_client_error(struct eap_sim_data *data, u8 id, 441 int err) 442{ 443 struct eap_sim_msg *msg; 444 445 eap_sim_state(data, FAILURE); 446 data->num_id_req = 0; 447 data->num_notification = 0; 448 449 wpa_printf(MSG_DEBUG, "EAP-SIM: Send Client-Error (error code %d)", 450 err); 451 msg = eap_sim_msg_init(EAP_CODE_RESPONSE, id, EAP_TYPE_SIM, 452 EAP_SIM_SUBTYPE_CLIENT_ERROR); 453 eap_sim_msg_add(msg, EAP_SIM_AT_CLIENT_ERROR_CODE, err, NULL, 0); 454 return eap_sim_msg_finish(msg, NULL, NULL, 0); 455} 456 457 458static struct wpabuf * eap_sim_response_start(struct eap_sm *sm, 459 struct eap_sim_data *data, u8 id, 460 enum eap_sim_id_req id_req) 461{ 462 const u8 *identity = NULL; 463 size_t identity_len = 0; 464 struct eap_sim_msg *msg; 465 466 data->reauth = 0; 467 if (id_req == ANY_ID && data->reauth_id) { 468 identity = data->reauth_id; 469 identity_len = data->reauth_id_len; 470 data->reauth = 1; 471 } else if ((id_req == ANY_ID || id_req == FULLAUTH_ID) && 472 data->pseudonym) { 473 identity = data->pseudonym; 474 identity_len = data->pseudonym_len; 475 eap_sim_clear_identities(sm, data, CLEAR_REAUTH_ID); 476 } else if (id_req != NO_ID_REQ) { 477 identity = eap_get_config_identity(sm, &identity_len); 478 if (identity) { 479 eap_sim_clear_identities(sm, data, CLEAR_PSEUDONYM | 480 CLEAR_REAUTH_ID); 481 } 482 } 483 if (id_req != NO_ID_REQ) 484 eap_sim_clear_identities(sm, data, CLEAR_EAP_ID); 485 486 wpa_printf(MSG_DEBUG, "Generating EAP-SIM Start (id=%d)", id); 487 msg = eap_sim_msg_init(EAP_CODE_RESPONSE, id, 488 EAP_TYPE_SIM, EAP_SIM_SUBTYPE_START); 489 if (!data->reauth) { 490 wpa_hexdump(MSG_DEBUG, " AT_NONCE_MT", 491 data->nonce_mt, EAP_SIM_NONCE_MT_LEN); 492 eap_sim_msg_add(msg, EAP_SIM_AT_NONCE_MT, 0, 493 data->nonce_mt, EAP_SIM_NONCE_MT_LEN); 494 wpa_printf(MSG_DEBUG, " AT_SELECTED_VERSION %d", 495 data->selected_version); 496 eap_sim_msg_add(msg, EAP_SIM_AT_SELECTED_VERSION, 497 data->selected_version, NULL, 0); 498 } 499 500 if (identity) { 501 wpa_hexdump_ascii(MSG_DEBUG, " AT_IDENTITY", 502 identity, identity_len); 503 eap_sim_msg_add(msg, EAP_SIM_AT_IDENTITY, identity_len, 504 identity, identity_len); 505 } 506 507 return eap_sim_msg_finish(msg, NULL, NULL, 0); 508} 509 510 511static struct wpabuf * eap_sim_response_challenge(struct eap_sim_data *data, 512 u8 id) 513{ 514 struct eap_sim_msg *msg; 515 516 wpa_printf(MSG_DEBUG, "Generating EAP-SIM Challenge (id=%d)", id); 517 msg = eap_sim_msg_init(EAP_CODE_RESPONSE, id, EAP_TYPE_SIM, 518 EAP_SIM_SUBTYPE_CHALLENGE); 519 if (data->use_result_ind) { 520 wpa_printf(MSG_DEBUG, " AT_RESULT_IND"); 521 eap_sim_msg_add(msg, EAP_SIM_AT_RESULT_IND, 0, NULL, 0); 522 } 523 wpa_printf(MSG_DEBUG, " AT_MAC"); 524 eap_sim_msg_add_mac(msg, EAP_SIM_AT_MAC); 525 return eap_sim_msg_finish(msg, data->k_aut, (u8 *) data->sres, 526 data->num_chal * EAP_SIM_SRES_LEN); 527} 528 529 530static struct wpabuf * eap_sim_response_reauth(struct eap_sim_data *data, 531 u8 id, int counter_too_small, 532 const u8 *nonce_s) 533{ 534 struct eap_sim_msg *msg; 535 unsigned int counter; 536 537 wpa_printf(MSG_DEBUG, "Generating EAP-SIM Reauthentication (id=%d)", 538 id); 539 msg = eap_sim_msg_init(EAP_CODE_RESPONSE, id, EAP_TYPE_SIM, 540 EAP_SIM_SUBTYPE_REAUTHENTICATION); 541 wpa_printf(MSG_DEBUG, " AT_IV"); 542 wpa_printf(MSG_DEBUG, " AT_ENCR_DATA"); 543 eap_sim_msg_add_encr_start(msg, EAP_SIM_AT_IV, EAP_SIM_AT_ENCR_DATA); 544 545 if (counter_too_small) { 546 wpa_printf(MSG_DEBUG, " *AT_COUNTER_TOO_SMALL"); 547 eap_sim_msg_add(msg, EAP_SIM_AT_COUNTER_TOO_SMALL, 0, NULL, 0); 548 counter = data->counter_too_small; 549 } else 550 counter = data->counter; 551 552 wpa_printf(MSG_DEBUG, " *AT_COUNTER %d", counter); 553 eap_sim_msg_add(msg, EAP_SIM_AT_COUNTER, counter, NULL, 0); 554 555 if (eap_sim_msg_add_encr_end(msg, data->k_encr, EAP_SIM_AT_PADDING)) { 556 wpa_printf(MSG_WARNING, "EAP-SIM: Failed to encrypt " 557 "AT_ENCR_DATA"); 558 eap_sim_msg_free(msg); 559 return NULL; 560 } 561 if (data->use_result_ind) { 562 wpa_printf(MSG_DEBUG, " AT_RESULT_IND"); 563 eap_sim_msg_add(msg, EAP_SIM_AT_RESULT_IND, 0, NULL, 0); 564 } 565 wpa_printf(MSG_DEBUG, " AT_MAC"); 566 eap_sim_msg_add_mac(msg, EAP_SIM_AT_MAC); 567 return eap_sim_msg_finish(msg, data->k_aut, nonce_s, 568 EAP_SIM_NONCE_S_LEN); 569} 570 571 572static struct wpabuf * eap_sim_response_notification(struct eap_sim_data *data, 573 u8 id, u16 notification) 574{ 575 struct eap_sim_msg *msg; 576 u8 *k_aut = (notification & 0x4000) == 0 ? data->k_aut : NULL; 577 578 wpa_printf(MSG_DEBUG, "Generating EAP-SIM Notification (id=%d)", id); 579 msg = eap_sim_msg_init(EAP_CODE_RESPONSE, id, 580 EAP_TYPE_SIM, EAP_SIM_SUBTYPE_NOTIFICATION); 581 if (k_aut && data->reauth) { 582 wpa_printf(MSG_DEBUG, " AT_IV"); 583 wpa_printf(MSG_DEBUG, " AT_ENCR_DATA"); 584 eap_sim_msg_add_encr_start(msg, EAP_SIM_AT_IV, 585 EAP_SIM_AT_ENCR_DATA); 586 wpa_printf(MSG_DEBUG, " *AT_COUNTER %d", data->counter); 587 eap_sim_msg_add(msg, EAP_SIM_AT_COUNTER, data->counter, 588 NULL, 0); 589 if (eap_sim_msg_add_encr_end(msg, data->k_encr, 590 EAP_SIM_AT_PADDING)) { 591 wpa_printf(MSG_WARNING, "EAP-SIM: Failed to encrypt " 592 "AT_ENCR_DATA"); 593 eap_sim_msg_free(msg); 594 return NULL; 595 } 596 } 597 if (k_aut) { 598 wpa_printf(MSG_DEBUG, " AT_MAC"); 599 eap_sim_msg_add_mac(msg, EAP_SIM_AT_MAC); 600 } 601 return eap_sim_msg_finish(msg, k_aut, (u8 *) "", 0); 602} 603 604 605static struct wpabuf * eap_sim_process_start(struct eap_sm *sm, 606 struct eap_sim_data *data, u8 id, 607 struct eap_sim_attrs *attr) 608{ 609 int selected_version = -1, id_error; 610 size_t i; 611 u8 *pos; 612 613 wpa_printf(MSG_DEBUG, "EAP-SIM: subtype Start"); 614 if (attr->version_list == NULL) { 615 wpa_printf(MSG_INFO, "EAP-SIM: No AT_VERSION_LIST in " 616 "SIM/Start"); 617 return eap_sim_client_error(data, id, 618 EAP_SIM_UNSUPPORTED_VERSION); 619 } 620 621 os_free(data->ver_list); 622 data->ver_list = os_malloc(attr->version_list_len); 623 if (data->ver_list == NULL) { 624 wpa_printf(MSG_DEBUG, "EAP-SIM: Failed to allocate " 625 "memory for version list"); 626 return eap_sim_client_error(data, id, 627 EAP_SIM_UNABLE_TO_PROCESS_PACKET); 628 } 629 os_memcpy(data->ver_list, attr->version_list, attr->version_list_len); 630 data->ver_list_len = attr->version_list_len; 631 pos = data->ver_list; 632 for (i = 0; i < data->ver_list_len / 2; i++) { 633 int ver = pos[0] * 256 + pos[1]; 634 pos += 2; 635 if (eap_sim_supported_ver(ver)) { 636 selected_version = ver; 637 break; 638 } 639 } 640 if (selected_version < 0) { 641 wpa_printf(MSG_INFO, "EAP-SIM: Could not find a supported " 642 "version"); 643 return eap_sim_client_error(data, id, 644 EAP_SIM_UNSUPPORTED_VERSION); 645 } 646 wpa_printf(MSG_DEBUG, "EAP-SIM: Selected Version %d", 647 selected_version); 648 data->selected_version = selected_version; 649 650 id_error = 0; 651 switch (attr->id_req) { 652 case NO_ID_REQ: 653 break; 654 case ANY_ID: 655 if (data->num_id_req > 0) 656 id_error++; 657 data->num_id_req++; 658 break; 659 case FULLAUTH_ID: 660 if (data->num_id_req > 1) 661 id_error++; 662 data->num_id_req++; 663 break; 664 case PERMANENT_ID: 665 if (data->num_id_req > 2) 666 id_error++; 667 data->num_id_req++; 668 break; 669 } 670 if (id_error) { 671 wpa_printf(MSG_INFO, "EAP-SIM: Too many ID requests " 672 "used within one authentication"); 673 return eap_sim_client_error(data, id, 674 EAP_SIM_UNABLE_TO_PROCESS_PACKET); 675 } 676 677 return eap_sim_response_start(sm, data, id, attr->id_req); 678} 679 680 681static struct wpabuf * eap_sim_process_challenge(struct eap_sm *sm, 682 struct eap_sim_data *data, 683 u8 id, 684 const struct wpabuf *reqData, 685 struct eap_sim_attrs *attr) 686{ 687 const u8 *identity; 688 size_t identity_len; 689 struct eap_sim_attrs eattr; 690 int res; 691 692 wpa_printf(MSG_DEBUG, "EAP-SIM: subtype Challenge"); 693 data->reauth = 0; 694 if (!attr->mac || !attr->rand) { 695 wpa_printf(MSG_WARNING, "EAP-SIM: Challenge message " 696 "did not include%s%s", 697 !attr->mac ? " AT_MAC" : "", 698 !attr->rand ? " AT_RAND" : ""); 699 return eap_sim_client_error(data, id, 700 EAP_SIM_UNABLE_TO_PROCESS_PACKET); 701 } 702 703 wpa_printf(MSG_DEBUG, "EAP-SIM: %lu challenges", 704 (unsigned long) attr->num_chal); 705 if (attr->num_chal < data->min_num_chal) { 706 wpa_printf(MSG_INFO, "EAP-SIM: Insufficient number of " 707 "challenges (%lu)", (unsigned long) attr->num_chal); 708 return eap_sim_client_error(data, id, 709 EAP_SIM_INSUFFICIENT_NUM_OF_CHAL); 710 } 711 if (attr->num_chal > 3) { 712 wpa_printf(MSG_INFO, "EAP-SIM: Too many challenges " 713 "(%lu)", (unsigned long) attr->num_chal); 714 return eap_sim_client_error(data, id, 715 EAP_SIM_UNABLE_TO_PROCESS_PACKET); 716 } 717 718 /* Verify that RANDs are different */ 719 if (os_memcmp(attr->rand, attr->rand + GSM_RAND_LEN, 720 GSM_RAND_LEN) == 0 || 721 (attr->num_chal > 2 && 722 (os_memcmp(attr->rand, attr->rand + 2 * GSM_RAND_LEN, 723 GSM_RAND_LEN) == 0 || 724 os_memcmp(attr->rand + GSM_RAND_LEN, 725 attr->rand + 2 * GSM_RAND_LEN, 726 GSM_RAND_LEN) == 0))) { 727 wpa_printf(MSG_INFO, "EAP-SIM: Same RAND used multiple times"); 728 return eap_sim_client_error(data, id, 729 EAP_SIM_RAND_NOT_FRESH); 730 } 731 732 os_memcpy(data->rand, attr->rand, attr->num_chal * GSM_RAND_LEN); 733 data->num_chal = attr->num_chal; 734 735 res = eap_sim_gsm_auth(sm, data); 736 if (res > 0) { 737 wpa_printf(MSG_DEBUG, "EAP-SIM: Wait for external SIM processing"); 738 return NULL; 739 } 740 if (res) { 741 wpa_printf(MSG_WARNING, "EAP-SIM: GSM authentication failed"); 742 return eap_sim_client_error(data, id, 743 EAP_SIM_UNABLE_TO_PROCESS_PACKET); 744 } 745 if (data->last_eap_identity) { 746 identity = data->last_eap_identity; 747 identity_len = data->last_eap_identity_len; 748 } else if (data->pseudonym) { 749 identity = data->pseudonym; 750 identity_len = data->pseudonym_len; 751 } else 752 identity = eap_get_config_identity(sm, &identity_len); 753 wpa_hexdump_ascii(MSG_DEBUG, "EAP-SIM: Selected identity for MK " 754 "derivation", identity, identity_len); 755 eap_sim_derive_mk(identity, identity_len, data->nonce_mt, 756 data->selected_version, data->ver_list, 757 data->ver_list_len, data->num_chal, 758 (const u8 *) data->kc, data->mk); 759 eap_sim_derive_keys(data->mk, data->k_encr, data->k_aut, data->msk, 760 data->emsk); 761 if (eap_sim_verify_mac(data->k_aut, reqData, attr->mac, data->nonce_mt, 762 EAP_SIM_NONCE_MT_LEN)) { 763 wpa_printf(MSG_WARNING, "EAP-SIM: Challenge message " 764 "used invalid AT_MAC"); 765 return eap_sim_client_error(data, id, 766 EAP_SIM_UNABLE_TO_PROCESS_PACKET); 767 } 768 769 /* Old reauthentication identity must not be used anymore. In 770 * other words, if no new reauth identity is received, full 771 * authentication will be used on next reauthentication (using 772 * pseudonym identity or permanent identity). */ 773 eap_sim_clear_identities(sm, data, CLEAR_REAUTH_ID | CLEAR_EAP_ID); 774 775 if (attr->encr_data) { 776 u8 *decrypted; 777 decrypted = eap_sim_parse_encr(data->k_encr, attr->encr_data, 778 attr->encr_data_len, attr->iv, 779 &eattr, 0); 780 if (decrypted == NULL) { 781 return eap_sim_client_error( 782 data, id, EAP_SIM_UNABLE_TO_PROCESS_PACKET); 783 } 784 eap_sim_learn_ids(sm, data, &eattr); 785 os_free(decrypted); 786 } 787 788 if (data->result_ind && attr->result_ind) 789 data->use_result_ind = 1; 790 791 if (data->state != FAILURE && data->state != RESULT_FAILURE) { 792 eap_sim_state(data, data->use_result_ind ? 793 RESULT_SUCCESS : SUCCESS); 794 } 795 796 data->num_id_req = 0; 797 data->num_notification = 0; 798 /* RFC 4186 specifies that counter is initialized to one after 799 * fullauth, but initializing it to zero makes it easier to implement 800 * reauth verification. */ 801 data->counter = 0; 802 return eap_sim_response_challenge(data, id); 803} 804 805 806static int eap_sim_process_notification_reauth(struct eap_sim_data *data, 807 struct eap_sim_attrs *attr) 808{ 809 struct eap_sim_attrs eattr; 810 u8 *decrypted; 811 812 if (attr->encr_data == NULL || attr->iv == NULL) { 813 wpa_printf(MSG_WARNING, "EAP-SIM: Notification message after " 814 "reauth did not include encrypted data"); 815 return -1; 816 } 817 818 decrypted = eap_sim_parse_encr(data->k_encr, attr->encr_data, 819 attr->encr_data_len, attr->iv, &eattr, 820 0); 821 if (decrypted == NULL) { 822 wpa_printf(MSG_WARNING, "EAP-SIM: Failed to parse encrypted " 823 "data from notification message"); 824 return -1; 825 } 826 827 if (eattr.counter < 0 || (size_t) eattr.counter != data->counter) { 828 wpa_printf(MSG_WARNING, "EAP-SIM: Counter in notification " 829 "message does not match with counter in reauth " 830 "message"); 831 os_free(decrypted); 832 return -1; 833 } 834 835 os_free(decrypted); 836 return 0; 837} 838 839 840static int eap_sim_process_notification_auth(struct eap_sim_data *data, 841 const struct wpabuf *reqData, 842 struct eap_sim_attrs *attr) 843{ 844 if (attr->mac == NULL) { 845 wpa_printf(MSG_INFO, "EAP-SIM: no AT_MAC in after_auth " 846 "Notification message"); 847 return -1; 848 } 849 850 if (eap_sim_verify_mac(data->k_aut, reqData, attr->mac, (u8 *) "", 0)) 851 { 852 wpa_printf(MSG_WARNING, "EAP-SIM: Notification message " 853 "used invalid AT_MAC"); 854 return -1; 855 } 856 857 if (data->reauth && 858 eap_sim_process_notification_reauth(data, attr)) { 859 wpa_printf(MSG_WARNING, "EAP-SIM: Invalid notification " 860 "message after reauth"); 861 return -1; 862 } 863 864 return 0; 865} 866 867 868static struct wpabuf * eap_sim_process_notification( 869 struct eap_sm *sm, struct eap_sim_data *data, u8 id, 870 const struct wpabuf *reqData, struct eap_sim_attrs *attr) 871{ 872 wpa_printf(MSG_DEBUG, "EAP-SIM: subtype Notification"); 873 if (data->num_notification > 0) { 874 wpa_printf(MSG_INFO, "EAP-SIM: too many notification " 875 "rounds (only one allowed)"); 876 return eap_sim_client_error(data, id, 877 EAP_SIM_UNABLE_TO_PROCESS_PACKET); 878 } 879 data->num_notification++; 880 if (attr->notification == -1) { 881 wpa_printf(MSG_INFO, "EAP-SIM: no AT_NOTIFICATION in " 882 "Notification message"); 883 return eap_sim_client_error(data, id, 884 EAP_SIM_UNABLE_TO_PROCESS_PACKET); 885 } 886 887 if ((attr->notification & 0x4000) == 0 && 888 eap_sim_process_notification_auth(data, reqData, attr)) { 889 return eap_sim_client_error(data, id, 890 EAP_SIM_UNABLE_TO_PROCESS_PACKET); 891 } 892 893 eap_sim_report_notification(sm->msg_ctx, attr->notification, 0); 894 if (attr->notification >= 0 && attr->notification < 32768) { 895 eap_sim_state(data, FAILURE); 896 } else if (attr->notification == EAP_SIM_SUCCESS && 897 data->state == RESULT_SUCCESS) 898 eap_sim_state(data, SUCCESS); 899 return eap_sim_response_notification(data, id, attr->notification); 900} 901 902 903static struct wpabuf * eap_sim_process_reauthentication( 904 struct eap_sm *sm, struct eap_sim_data *data, u8 id, 905 const struct wpabuf *reqData, struct eap_sim_attrs *attr) 906{ 907 struct eap_sim_attrs eattr; 908 u8 *decrypted; 909 910 wpa_printf(MSG_DEBUG, "EAP-SIM: subtype Reauthentication"); 911 912 if (data->reauth_id == NULL) { 913 wpa_printf(MSG_WARNING, "EAP-SIM: Server is trying " 914 "reauthentication, but no reauth_id available"); 915 return eap_sim_client_error(data, id, 916 EAP_SIM_UNABLE_TO_PROCESS_PACKET); 917 } 918 919 data->reauth = 1; 920 if (eap_sim_verify_mac(data->k_aut, reqData, attr->mac, (u8 *) "", 0)) 921 { 922 wpa_printf(MSG_WARNING, "EAP-SIM: Reauthentication " 923 "did not have valid AT_MAC"); 924 return eap_sim_client_error(data, id, 925 EAP_SIM_UNABLE_TO_PROCESS_PACKET); 926 } 927 928 if (attr->encr_data == NULL || attr->iv == NULL) { 929 wpa_printf(MSG_WARNING, "EAP-SIM: Reauthentication " 930 "message did not include encrypted data"); 931 return eap_sim_client_error(data, id, 932 EAP_SIM_UNABLE_TO_PROCESS_PACKET); 933 } 934 935 decrypted = eap_sim_parse_encr(data->k_encr, attr->encr_data, 936 attr->encr_data_len, attr->iv, &eattr, 937 0); 938 if (decrypted == NULL) { 939 wpa_printf(MSG_WARNING, "EAP-SIM: Failed to parse encrypted " 940 "data from reauthentication message"); 941 return eap_sim_client_error(data, id, 942 EAP_SIM_UNABLE_TO_PROCESS_PACKET); 943 } 944 945 if (eattr.nonce_s == NULL || eattr.counter < 0) { 946 wpa_printf(MSG_INFO, "EAP-SIM: (encr) No%s%s in reauth packet", 947 !eattr.nonce_s ? " AT_NONCE_S" : "", 948 eattr.counter < 0 ? " AT_COUNTER" : ""); 949 os_free(decrypted); 950 return eap_sim_client_error(data, id, 951 EAP_SIM_UNABLE_TO_PROCESS_PACKET); 952 } 953 954 if (eattr.counter < 0 || (size_t) eattr.counter <= data->counter) { 955 wpa_printf(MSG_INFO, "EAP-SIM: (encr) Invalid counter " 956 "(%d <= %d)", eattr.counter, data->counter); 957 data->counter_too_small = eattr.counter; 958 /* Reply using Re-auth w/ AT_COUNTER_TOO_SMALL. The current 959 * reauth_id must not be used to start a new reauthentication. 960 * However, since it was used in the last EAP-Response-Identity 961 * packet, it has to saved for the following fullauth to be 962 * used in MK derivation. */ 963 os_free(data->last_eap_identity); 964 data->last_eap_identity = data->reauth_id; 965 data->last_eap_identity_len = data->reauth_id_len; 966 data->reauth_id = NULL; 967 data->reauth_id_len = 0; 968 os_free(decrypted); 969 return eap_sim_response_reauth(data, id, 1, eattr.nonce_s); 970 } 971 data->counter = eattr.counter; 972 973 os_memcpy(data->nonce_s, eattr.nonce_s, EAP_SIM_NONCE_S_LEN); 974 wpa_hexdump(MSG_DEBUG, "EAP-SIM: (encr) AT_NONCE_S", 975 data->nonce_s, EAP_SIM_NONCE_S_LEN); 976 977 eap_sim_derive_keys_reauth(data->counter, 978 data->reauth_id, data->reauth_id_len, 979 data->nonce_s, data->mk, data->msk, 980 data->emsk); 981 eap_sim_clear_identities(sm, data, CLEAR_REAUTH_ID | CLEAR_EAP_ID); 982 eap_sim_learn_ids(sm, data, &eattr); 983 984 if (data->result_ind && attr->result_ind) 985 data->use_result_ind = 1; 986 987 if (data->state != FAILURE && data->state != RESULT_FAILURE) { 988 eap_sim_state(data, data->use_result_ind ? 989 RESULT_SUCCESS : SUCCESS); 990 } 991 992 data->num_id_req = 0; 993 data->num_notification = 0; 994 if (data->counter > EAP_SIM_MAX_FAST_REAUTHS) { 995 wpa_printf(MSG_DEBUG, "EAP-SIM: Maximum number of " 996 "fast reauths performed - force fullauth"); 997 eap_sim_clear_identities(sm, data, 998 CLEAR_REAUTH_ID | CLEAR_EAP_ID); 999 } 1000 os_free(decrypted); 1001 return eap_sim_response_reauth(data, id, 0, data->nonce_s); 1002} 1003 1004 1005static struct wpabuf * eap_sim_process(struct eap_sm *sm, void *priv, 1006 struct eap_method_ret *ret, 1007 const struct wpabuf *reqData) 1008{ 1009 struct eap_sim_data *data = priv; 1010 const struct eap_hdr *req; 1011 u8 subtype, id; 1012 struct wpabuf *res; 1013 const u8 *pos; 1014 struct eap_sim_attrs attr; 1015 size_t len; 1016 1017 wpa_hexdump_buf(MSG_DEBUG, "EAP-SIM: EAP data", reqData); 1018 if (eap_get_config_identity(sm, &len) == NULL) { 1019 wpa_printf(MSG_INFO, "EAP-SIM: Identity not configured"); 1020 eap_sm_request_identity(sm); 1021 ret->ignore = TRUE; 1022 return NULL; 1023 } 1024 1025 pos = eap_hdr_validate(EAP_VENDOR_IETF, EAP_TYPE_SIM, reqData, &len); 1026 if (pos == NULL || len < 1) { 1027 ret->ignore = TRUE; 1028 return NULL; 1029 } 1030 req = wpabuf_head(reqData); 1031 id = req->identifier; 1032 len = be_to_host16(req->length); 1033 1034 ret->ignore = FALSE; 1035 ret->methodState = METHOD_MAY_CONT; 1036 ret->decision = DECISION_FAIL; 1037 ret->allowNotifications = TRUE; 1038 1039 subtype = *pos++; 1040 wpa_printf(MSG_DEBUG, "EAP-SIM: Subtype=%d", subtype); 1041 pos += 2; /* Reserved */ 1042 1043 if (eap_sim_parse_attr(pos, wpabuf_head_u8(reqData) + len, &attr, 0, 1044 0)) { 1045 res = eap_sim_client_error(data, id, 1046 EAP_SIM_UNABLE_TO_PROCESS_PACKET); 1047 goto done; 1048 } 1049 1050 switch (subtype) { 1051 case EAP_SIM_SUBTYPE_START: 1052 res = eap_sim_process_start(sm, data, id, &attr); 1053 break; 1054 case EAP_SIM_SUBTYPE_CHALLENGE: 1055 res = eap_sim_process_challenge(sm, data, id, reqData, &attr); 1056 break; 1057 case EAP_SIM_SUBTYPE_NOTIFICATION: 1058 res = eap_sim_process_notification(sm, data, id, reqData, 1059 &attr); 1060 break; 1061 case EAP_SIM_SUBTYPE_REAUTHENTICATION: 1062 res = eap_sim_process_reauthentication(sm, data, id, reqData, 1063 &attr); 1064 break; 1065 case EAP_SIM_SUBTYPE_CLIENT_ERROR: 1066 wpa_printf(MSG_DEBUG, "EAP-SIM: subtype Client-Error"); 1067 res = eap_sim_client_error(data, id, 1068 EAP_SIM_UNABLE_TO_PROCESS_PACKET); 1069 break; 1070 default: 1071 wpa_printf(MSG_DEBUG, "EAP-SIM: Unknown subtype=%d", subtype); 1072 res = eap_sim_client_error(data, id, 1073 EAP_SIM_UNABLE_TO_PROCESS_PACKET); 1074 break; 1075 } 1076 1077done: 1078 if (data->state == FAILURE) { 1079 ret->decision = DECISION_FAIL; 1080 ret->methodState = METHOD_DONE; 1081 } else if (data->state == SUCCESS) { 1082 ret->decision = data->use_result_ind ? 1083 DECISION_UNCOND_SUCC : DECISION_COND_SUCC; 1084 ret->methodState = data->use_result_ind ? 1085 METHOD_DONE : METHOD_MAY_CONT; 1086 } else if (data->state == RESULT_FAILURE) 1087 ret->methodState = METHOD_CONT; 1088 else if (data->state == RESULT_SUCCESS) 1089 ret->methodState = METHOD_CONT; 1090 1091 if (ret->methodState == METHOD_DONE) { 1092 ret->allowNotifications = FALSE; 1093 } 1094 1095 return res; 1096} 1097 1098 1099static Boolean eap_sim_has_reauth_data(struct eap_sm *sm, void *priv) 1100{ 1101 struct eap_sim_data *data = priv; 1102 return data->pseudonym || data->reauth_id; 1103} 1104 1105 1106static void eap_sim_deinit_for_reauth(struct eap_sm *sm, void *priv) 1107{ 1108 struct eap_sim_data *data = priv; 1109 eap_sim_clear_identities(sm, data, CLEAR_EAP_ID); 1110 data->use_result_ind = 0; 1111} 1112 1113 1114static void * eap_sim_init_for_reauth(struct eap_sm *sm, void *priv) 1115{ 1116 struct eap_sim_data *data = priv; 1117 if (random_get_bytes(data->nonce_mt, EAP_SIM_NONCE_MT_LEN)) { 1118 wpa_printf(MSG_WARNING, "EAP-SIM: Failed to get random data " 1119 "for NONCE_MT"); 1120 os_free(data); 1121 return NULL; 1122 } 1123 data->num_id_req = 0; 1124 data->num_notification = 0; 1125 eap_sim_state(data, CONTINUE); 1126 return priv; 1127} 1128 1129 1130static const u8 * eap_sim_get_identity(struct eap_sm *sm, void *priv, 1131 size_t *len) 1132{ 1133 struct eap_sim_data *data = priv; 1134 1135 if (data->reauth_id) { 1136 *len = data->reauth_id_len; 1137 return data->reauth_id; 1138 } 1139 1140 if (data->pseudonym) { 1141 *len = data->pseudonym_len; 1142 return data->pseudonym; 1143 } 1144 1145 return NULL; 1146} 1147 1148 1149static Boolean eap_sim_isKeyAvailable(struct eap_sm *sm, void *priv) 1150{ 1151 struct eap_sim_data *data = priv; 1152 return data->state == SUCCESS; 1153} 1154 1155 1156static u8 * eap_sim_getKey(struct eap_sm *sm, void *priv, size_t *len) 1157{ 1158 struct eap_sim_data *data = priv; 1159 u8 *key; 1160 1161 if (data->state != SUCCESS) 1162 return NULL; 1163 1164 key = os_malloc(EAP_SIM_KEYING_DATA_LEN); 1165 if (key == NULL) 1166 return NULL; 1167 1168 *len = EAP_SIM_KEYING_DATA_LEN; 1169 os_memcpy(key, data->msk, EAP_SIM_KEYING_DATA_LEN); 1170 1171 return key; 1172} 1173 1174 1175static u8 * eap_sim_get_session_id(struct eap_sm *sm, void *priv, size_t *len) 1176{ 1177 struct eap_sim_data *data = priv; 1178 u8 *id; 1179 1180 if (data->state != SUCCESS) 1181 return NULL; 1182 1183 *len = 1 + data->num_chal * GSM_RAND_LEN + EAP_SIM_NONCE_MT_LEN; 1184 id = os_malloc(*len); 1185 if (id == NULL) 1186 return NULL; 1187 1188 id[0] = EAP_TYPE_SIM; 1189 os_memcpy(id + 1, data->rand, data->num_chal * GSM_RAND_LEN); 1190 os_memcpy(id + 1 + data->num_chal * GSM_RAND_LEN, data->nonce_mt, 1191 EAP_SIM_NONCE_MT_LEN); 1192 wpa_hexdump(MSG_DEBUG, "EAP-SIM: Derived Session-Id", id, *len); 1193 1194 return id; 1195} 1196 1197 1198static u8 * eap_sim_get_emsk(struct eap_sm *sm, void *priv, size_t *len) 1199{ 1200 struct eap_sim_data *data = priv; 1201 u8 *key; 1202 1203 if (data->state != SUCCESS) 1204 return NULL; 1205 1206 key = os_malloc(EAP_EMSK_LEN); 1207 if (key == NULL) 1208 return NULL; 1209 1210 *len = EAP_EMSK_LEN; 1211 os_memcpy(key, data->emsk, EAP_EMSK_LEN); 1212 1213 return key; 1214} 1215 1216 1217int eap_peer_sim_register(void) 1218{ 1219 struct eap_method *eap; 1220 int ret; 1221 1222 eap = eap_peer_method_alloc(EAP_PEER_METHOD_INTERFACE_VERSION, 1223 EAP_VENDOR_IETF, EAP_TYPE_SIM, "SIM"); 1224 if (eap == NULL) 1225 return -1; 1226 1227 eap->init = eap_sim_init; 1228 eap->deinit = eap_sim_deinit; 1229 eap->process = eap_sim_process; 1230 eap->isKeyAvailable = eap_sim_isKeyAvailable; 1231 eap->getKey = eap_sim_getKey; 1232 eap->getSessionId = eap_sim_get_session_id; 1233 eap->has_reauth_data = eap_sim_has_reauth_data; 1234 eap->deinit_for_reauth = eap_sim_deinit_for_reauth; 1235 eap->init_for_reauth = eap_sim_init_for_reauth; 1236 eap->get_identity = eap_sim_get_identity; 1237 eap->get_emsk = eap_sim_get_emsk; 1238 1239 ret = eap_peer_method_register(eap); 1240 if (ret) 1241 eap_peer_method_free(eap); 1242 return ret; 1243} 1244