The Android Open Source Project | 845e012 | 2009-03-03 19:31:34 -0800 | [diff] [blame] | 1 | /* |
| 2 | * EAP peer method: EAP-SIM (RFC 4186) |
| 3 | * Copyright (c) 2004-2006, Jouni Malinen <j@w1.fi> |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify |
| 6 | * it under the terms of the GNU General Public License version 2 as |
| 7 | * published by the Free Software Foundation. |
| 8 | * |
| 9 | * Alternatively, this software may be distributed under the terms of BSD |
| 10 | * license. |
| 11 | * |
| 12 | * See README and COPYING for more details. |
| 13 | */ |
| 14 | |
| 15 | #include "includes.h" |
| 16 | |
| 17 | #include "common.h" |
| 18 | #include "eap_i.h" |
| 19 | #include "config_ssid.h" |
| 20 | #include "crypto.h" |
| 21 | #include "pcsc_funcs.h" |
| 22 | #include "eap_sim_common.h" |
| 23 | |
| 24 | |
| 25 | struct eap_sim_data { |
| 26 | u8 *ver_list; |
| 27 | size_t ver_list_len; |
| 28 | int selected_version; |
| 29 | size_t min_num_chal, num_chal; |
| 30 | |
| 31 | u8 kc[3][EAP_SIM_KC_LEN]; |
| 32 | u8 sres[3][EAP_SIM_SRES_LEN]; |
| 33 | u8 nonce_mt[EAP_SIM_NONCE_MT_LEN], nonce_s[EAP_SIM_NONCE_S_LEN]; |
| 34 | u8 mk[EAP_SIM_MK_LEN]; |
| 35 | u8 k_aut[EAP_SIM_K_AUT_LEN]; |
| 36 | u8 k_encr[EAP_SIM_K_ENCR_LEN]; |
| 37 | u8 msk[EAP_SIM_KEYING_DATA_LEN]; |
| 38 | u8 emsk[EAP_EMSK_LEN]; |
| 39 | u8 rand[3][GSM_RAND_LEN]; |
| 40 | |
| 41 | int num_id_req, num_notification; |
| 42 | u8 *pseudonym; |
| 43 | size_t pseudonym_len; |
| 44 | u8 *reauth_id; |
| 45 | size_t reauth_id_len; |
| 46 | int reauth; |
| 47 | unsigned int counter, counter_too_small; |
| 48 | u8 *last_eap_identity; |
| 49 | size_t last_eap_identity_len; |
| 50 | enum { CONTINUE, SUCCESS, FAILURE } state; |
| 51 | }; |
| 52 | |
| 53 | |
| 54 | static void * eap_sim_init(struct eap_sm *sm) |
| 55 | { |
| 56 | struct eap_sim_data *data; |
| 57 | struct wpa_ssid *config = eap_get_config(sm); |
| 58 | |
| 59 | data = os_zalloc(sizeof(*data)); |
| 60 | if (data == NULL) |
| 61 | return NULL; |
| 62 | |
| 63 | if (hostapd_get_rand(data->nonce_mt, EAP_SIM_NONCE_MT_LEN)) { |
| 64 | wpa_printf(MSG_WARNING, "EAP-SIM: Failed to get random data " |
| 65 | "for NONCE_MT"); |
| 66 | os_free(data); |
| 67 | return NULL; |
| 68 | } |
| 69 | |
| 70 | data->min_num_chal = 2; |
| 71 | if (config && config->phase1) { |
| 72 | char *pos = os_strstr(config->phase1, "sim_min_num_chal="); |
| 73 | if (pos) { |
| 74 | data->min_num_chal = atoi(pos + 17); |
| 75 | if (data->min_num_chal < 2 || data->min_num_chal > 3) { |
| 76 | wpa_printf(MSG_WARNING, "EAP-SIM: Invalid " |
| 77 | "sim_min_num_chal configuration " |
| 78 | "(%lu, expected 2 or 3)", |
| 79 | (unsigned long) data->min_num_chal); |
| 80 | os_free(data); |
| 81 | return NULL; |
| 82 | } |
| 83 | wpa_printf(MSG_DEBUG, "EAP-SIM: Set minimum number of " |
| 84 | "challenges to %lu", |
| 85 | (unsigned long) data->min_num_chal); |
| 86 | } |
| 87 | } |
| 88 | |
| 89 | data->state = CONTINUE; |
| 90 | |
| 91 | return data; |
| 92 | } |
| 93 | |
| 94 | |
| 95 | static void eap_sim_deinit(struct eap_sm *sm, void *priv) |
| 96 | { |
| 97 | struct eap_sim_data *data = priv; |
| 98 | if (data) { |
| 99 | os_free(data->ver_list); |
| 100 | os_free(data->pseudonym); |
| 101 | os_free(data->reauth_id); |
| 102 | os_free(data->last_eap_identity); |
| 103 | os_free(data); |
| 104 | } |
| 105 | } |
| 106 | |
| 107 | |
| 108 | static int eap_sim_gsm_auth(struct eap_sm *sm, struct eap_sim_data *data) |
| 109 | { |
| 110 | wpa_printf(MSG_DEBUG, "EAP-SIM: GSM authentication algorithm"); |
| 111 | #ifdef PCSC_FUNCS |
| 112 | if (scard_gsm_auth(sm->scard_ctx, data->rand[0], |
| 113 | data->sres[0], data->kc[0]) || |
| 114 | scard_gsm_auth(sm->scard_ctx, data->rand[1], |
| 115 | data->sres[1], data->kc[1]) || |
| 116 | (data->num_chal > 2 && |
| 117 | scard_gsm_auth(sm->scard_ctx, data->rand[2], |
| 118 | data->sres[2], data->kc[2]))) { |
| 119 | wpa_printf(MSG_DEBUG, "EAP-SIM: GSM SIM authentication could " |
| 120 | "not be completed"); |
| 121 | return -1; |
| 122 | } |
| 123 | #else /* PCSC_FUNCS */ |
| 124 | /* These hardcoded Kc and SRES values are used for testing. RAND to |
| 125 | * KC/SREC mapping is very bogus as far as real authentication is |
| 126 | * concerned, but it is quite useful for cases where the AS is rotating |
| 127 | * the order of pre-configured values. */ |
| 128 | { |
| 129 | size_t i; |
| 130 | for (i = 0; i < data->num_chal; i++) { |
| 131 | if (data->rand[i][0] == 0xaa) { |
| 132 | os_memcpy(data->kc[i], |
| 133 | "\xa0\xa1\xa2\xa3\xa4\xa5\xa6\xa7", |
| 134 | EAP_SIM_KC_LEN); |
| 135 | os_memcpy(data->sres[i], "\xd1\xd2\xd3\xd4", |
| 136 | EAP_SIM_SRES_LEN); |
| 137 | } else if (data->rand[i][0] == 0xbb) { |
| 138 | os_memcpy(data->kc[i], |
| 139 | "\xb0\xb1\xb2\xb3\xb4\xb5\xb6\xb7", |
| 140 | EAP_SIM_KC_LEN); |
| 141 | os_memcpy(data->sres[i], "\xe1\xe2\xe3\xe4", |
| 142 | EAP_SIM_SRES_LEN); |
| 143 | } else { |
| 144 | os_memcpy(data->kc[i], |
| 145 | "\xc0\xc1\xc2\xc3\xc4\xc5\xc6\xc7", |
| 146 | EAP_SIM_KC_LEN); |
| 147 | os_memcpy(data->sres[i], "\xf1\xf2\xf3\xf4", |
| 148 | EAP_SIM_SRES_LEN); |
| 149 | } |
| 150 | } |
| 151 | } |
| 152 | #endif /* PCSC_FUNCS */ |
| 153 | return 0; |
| 154 | } |
| 155 | |
| 156 | |
| 157 | static int eap_sim_supported_ver(int version) |
| 158 | { |
| 159 | return version == EAP_SIM_VERSION; |
| 160 | } |
| 161 | |
| 162 | |
| 163 | #define CLEAR_PSEUDONYM 0x01 |
| 164 | #define CLEAR_REAUTH_ID 0x02 |
| 165 | #define CLEAR_EAP_ID 0x04 |
| 166 | |
| 167 | static void eap_sim_clear_identities(struct eap_sim_data *data, int id) |
| 168 | { |
| 169 | wpa_printf(MSG_DEBUG, "EAP-SIM: forgetting old%s%s%s", |
| 170 | id & CLEAR_PSEUDONYM ? " pseudonym" : "", |
| 171 | id & CLEAR_REAUTH_ID ? " reauth_id" : "", |
| 172 | id & CLEAR_EAP_ID ? " eap_id" : ""); |
| 173 | if (id & CLEAR_PSEUDONYM) { |
| 174 | os_free(data->pseudonym); |
| 175 | data->pseudonym = NULL; |
| 176 | data->pseudonym_len = 0; |
| 177 | } |
| 178 | if (id & CLEAR_REAUTH_ID) { |
| 179 | os_free(data->reauth_id); |
| 180 | data->reauth_id = NULL; |
| 181 | data->reauth_id_len = 0; |
| 182 | } |
| 183 | if (id & CLEAR_EAP_ID) { |
| 184 | os_free(data->last_eap_identity); |
| 185 | data->last_eap_identity = NULL; |
| 186 | data->last_eap_identity_len = 0; |
| 187 | } |
| 188 | } |
| 189 | |
| 190 | |
| 191 | static int eap_sim_learn_ids(struct eap_sim_data *data, |
| 192 | struct eap_sim_attrs *attr) |
| 193 | { |
| 194 | if (attr->next_pseudonym) { |
| 195 | os_free(data->pseudonym); |
| 196 | data->pseudonym = os_malloc(attr->next_pseudonym_len); |
| 197 | if (data->pseudonym == NULL) { |
| 198 | wpa_printf(MSG_INFO, "EAP-SIM: (encr) No memory for " |
| 199 | "next pseudonym"); |
| 200 | return -1; |
| 201 | } |
| 202 | os_memcpy(data->pseudonym, attr->next_pseudonym, |
| 203 | attr->next_pseudonym_len); |
| 204 | data->pseudonym_len = attr->next_pseudonym_len; |
| 205 | wpa_hexdump_ascii(MSG_DEBUG, |
| 206 | "EAP-SIM: (encr) AT_NEXT_PSEUDONYM", |
| 207 | data->pseudonym, |
| 208 | data->pseudonym_len); |
| 209 | } |
| 210 | |
| 211 | if (attr->next_reauth_id) { |
| 212 | os_free(data->reauth_id); |
| 213 | data->reauth_id = os_malloc(attr->next_reauth_id_len); |
| 214 | if (data->reauth_id == NULL) { |
| 215 | wpa_printf(MSG_INFO, "EAP-SIM: (encr) No memory for " |
| 216 | "next reauth_id"); |
| 217 | return -1; |
| 218 | } |
| 219 | os_memcpy(data->reauth_id, attr->next_reauth_id, |
| 220 | attr->next_reauth_id_len); |
| 221 | data->reauth_id_len = attr->next_reauth_id_len; |
| 222 | wpa_hexdump_ascii(MSG_DEBUG, |
| 223 | "EAP-SIM: (encr) AT_NEXT_REAUTH_ID", |
| 224 | data->reauth_id, |
| 225 | data->reauth_id_len); |
| 226 | } |
| 227 | |
| 228 | return 0; |
| 229 | } |
| 230 | |
| 231 | |
| 232 | static u8 * eap_sim_client_error(struct eap_sim_data *data, |
| 233 | const struct eap_hdr *req, |
| 234 | size_t *respDataLen, int err) |
| 235 | { |
| 236 | struct eap_sim_msg *msg; |
| 237 | |
| 238 | data->state = FAILURE; |
| 239 | data->num_id_req = 0; |
| 240 | data->num_notification = 0; |
| 241 | |
| 242 | msg = eap_sim_msg_init(EAP_CODE_RESPONSE, req->identifier, |
| 243 | EAP_TYPE_SIM, EAP_SIM_SUBTYPE_CLIENT_ERROR); |
| 244 | eap_sim_msg_add(msg, EAP_SIM_AT_CLIENT_ERROR_CODE, err, NULL, 0); |
| 245 | return eap_sim_msg_finish(msg, respDataLen, NULL, NULL, 0); |
| 246 | } |
| 247 | |
| 248 | |
| 249 | static u8 * eap_sim_response_start(struct eap_sm *sm, |
| 250 | struct eap_sim_data *data, |
| 251 | const struct eap_hdr *req, |
| 252 | size_t *respDataLen, |
| 253 | enum eap_sim_id_req id_req) |
| 254 | { |
| 255 | const u8 *identity = NULL; |
| 256 | size_t identity_len = 0; |
| 257 | struct eap_sim_msg *msg; |
| 258 | |
| 259 | data->reauth = 0; |
| 260 | if (id_req == ANY_ID && data->reauth_id) { |
| 261 | identity = data->reauth_id; |
| 262 | identity_len = data->reauth_id_len; |
| 263 | data->reauth = 1; |
| 264 | } else if ((id_req == ANY_ID || id_req == FULLAUTH_ID) && |
| 265 | data->pseudonym) { |
| 266 | identity = data->pseudonym; |
| 267 | identity_len = data->pseudonym_len; |
| 268 | eap_sim_clear_identities(data, CLEAR_REAUTH_ID); |
| 269 | } else if (id_req != NO_ID_REQ) { |
| 270 | identity = eap_get_config_identity(sm, &identity_len); |
| 271 | if (identity) { |
| 272 | eap_sim_clear_identities(data, CLEAR_PSEUDONYM | |
| 273 | CLEAR_REAUTH_ID); |
| 274 | } |
| 275 | } |
| 276 | if (id_req != NO_ID_REQ) |
| 277 | eap_sim_clear_identities(data, CLEAR_EAP_ID); |
| 278 | |
| 279 | wpa_printf(MSG_DEBUG, "Generating EAP-SIM Start (id=%d)", |
| 280 | req->identifier); |
| 281 | msg = eap_sim_msg_init(EAP_CODE_RESPONSE, req->identifier, |
| 282 | EAP_TYPE_SIM, EAP_SIM_SUBTYPE_START); |
| 283 | if (!data->reauth) { |
| 284 | wpa_hexdump(MSG_DEBUG, " AT_NONCE_MT", |
| 285 | data->nonce_mt, EAP_SIM_NONCE_MT_LEN); |
| 286 | eap_sim_msg_add(msg, EAP_SIM_AT_NONCE_MT, 0, |
| 287 | data->nonce_mt, EAP_SIM_NONCE_MT_LEN); |
| 288 | wpa_printf(MSG_DEBUG, " AT_SELECTED_VERSION %d", |
| 289 | data->selected_version); |
| 290 | eap_sim_msg_add(msg, EAP_SIM_AT_SELECTED_VERSION, |
| 291 | data->selected_version, NULL, 0); |
| 292 | } |
| 293 | |
| 294 | if (identity) { |
| 295 | wpa_hexdump_ascii(MSG_DEBUG, " AT_IDENTITY", |
| 296 | identity, identity_len); |
| 297 | eap_sim_msg_add(msg, EAP_SIM_AT_IDENTITY, identity_len, |
| 298 | identity, identity_len); |
| 299 | } |
| 300 | |
| 301 | return eap_sim_msg_finish(msg, respDataLen, NULL, NULL, 0); |
| 302 | } |
| 303 | |
| 304 | |
| 305 | static u8 * eap_sim_response_challenge(struct eap_sim_data *data, |
| 306 | const struct eap_hdr *req, |
| 307 | size_t *respDataLen) |
| 308 | { |
| 309 | struct eap_sim_msg *msg; |
| 310 | |
| 311 | wpa_printf(MSG_DEBUG, "Generating EAP-SIM Challenge (id=%d)", |
| 312 | req->identifier); |
| 313 | msg = eap_sim_msg_init(EAP_CODE_RESPONSE, req->identifier, |
| 314 | EAP_TYPE_SIM, EAP_SIM_SUBTYPE_CHALLENGE); |
| 315 | wpa_printf(MSG_DEBUG, " AT_MAC"); |
| 316 | eap_sim_msg_add_mac(msg, EAP_SIM_AT_MAC); |
| 317 | return eap_sim_msg_finish(msg, respDataLen, data->k_aut, |
| 318 | (u8 *) data->sres, |
| 319 | data->num_chal * EAP_SIM_SRES_LEN); |
| 320 | } |
| 321 | |
| 322 | |
| 323 | static u8 * eap_sim_response_reauth(struct eap_sim_data *data, |
| 324 | const struct eap_hdr *req, |
| 325 | size_t *respDataLen, int counter_too_small) |
| 326 | { |
| 327 | struct eap_sim_msg *msg; |
| 328 | unsigned int counter; |
| 329 | |
| 330 | wpa_printf(MSG_DEBUG, "Generating EAP-SIM Reauthentication (id=%d)", |
| 331 | req->identifier); |
| 332 | msg = eap_sim_msg_init(EAP_CODE_RESPONSE, req->identifier, |
| 333 | EAP_TYPE_SIM, |
| 334 | EAP_SIM_SUBTYPE_REAUTHENTICATION); |
| 335 | wpa_printf(MSG_DEBUG, " AT_IV"); |
| 336 | wpa_printf(MSG_DEBUG, " AT_ENCR_DATA"); |
| 337 | eap_sim_msg_add_encr_start(msg, EAP_SIM_AT_IV, EAP_SIM_AT_ENCR_DATA); |
| 338 | |
| 339 | if (counter_too_small) { |
| 340 | wpa_printf(MSG_DEBUG, " *AT_COUNTER_TOO_SMALL"); |
| 341 | eap_sim_msg_add(msg, EAP_SIM_AT_COUNTER_TOO_SMALL, 0, NULL, 0); |
| 342 | counter = data->counter_too_small; |
| 343 | } else |
| 344 | counter = data->counter; |
| 345 | |
| 346 | wpa_printf(MSG_DEBUG, " *AT_COUNTER %d", counter); |
| 347 | eap_sim_msg_add(msg, EAP_SIM_AT_COUNTER, counter, NULL, 0); |
| 348 | |
| 349 | if (eap_sim_msg_add_encr_end(msg, data->k_encr, EAP_SIM_AT_PADDING)) { |
| 350 | wpa_printf(MSG_WARNING, "EAP-SIM: Failed to encrypt " |
| 351 | "AT_ENCR_DATA"); |
| 352 | eap_sim_msg_free(msg); |
| 353 | return NULL; |
| 354 | } |
| 355 | wpa_printf(MSG_DEBUG, " AT_MAC"); |
| 356 | eap_sim_msg_add_mac(msg, EAP_SIM_AT_MAC); |
| 357 | return eap_sim_msg_finish(msg, respDataLen, data->k_aut, data->nonce_s, |
| 358 | EAP_SIM_NONCE_S_LEN); |
| 359 | } |
| 360 | |
| 361 | |
| 362 | static u8 * eap_sim_response_notification(struct eap_sim_data *data, |
| 363 | const struct eap_hdr *req, |
| 364 | size_t *respDataLen, |
| 365 | u16 notification) |
| 366 | { |
| 367 | struct eap_sim_msg *msg; |
| 368 | u8 *k_aut = (notification & 0x4000) == 0 ? data->k_aut : NULL; |
| 369 | |
| 370 | wpa_printf(MSG_DEBUG, "Generating EAP-SIM Notification (id=%d)", |
| 371 | req->identifier); |
| 372 | msg = eap_sim_msg_init(EAP_CODE_RESPONSE, req->identifier, |
| 373 | EAP_TYPE_SIM, EAP_SIM_SUBTYPE_NOTIFICATION); |
| 374 | wpa_printf(MSG_DEBUG, " AT_NOTIFICATION"); |
| 375 | eap_sim_msg_add(msg, EAP_SIM_AT_NOTIFICATION, notification, NULL, 0); |
| 376 | if (k_aut && data->reauth) { |
| 377 | wpa_printf(MSG_DEBUG, " AT_IV"); |
| 378 | wpa_printf(MSG_DEBUG, " AT_ENCR_DATA"); |
| 379 | eap_sim_msg_add_encr_start(msg, EAP_SIM_AT_IV, |
| 380 | EAP_SIM_AT_ENCR_DATA); |
| 381 | wpa_printf(MSG_DEBUG, " *AT_COUNTER %d", data->counter); |
| 382 | eap_sim_msg_add(msg, EAP_SIM_AT_COUNTER, data->counter, |
| 383 | NULL, 0); |
| 384 | if (eap_sim_msg_add_encr_end(msg, data->k_encr, |
| 385 | EAP_SIM_AT_PADDING)) { |
| 386 | wpa_printf(MSG_WARNING, "EAP-SIM: Failed to encrypt " |
| 387 | "AT_ENCR_DATA"); |
| 388 | eap_sim_msg_free(msg); |
| 389 | return NULL; |
| 390 | } |
| 391 | } |
| 392 | if (k_aut) { |
| 393 | wpa_printf(MSG_DEBUG, " AT_MAC"); |
| 394 | eap_sim_msg_add_mac(msg, EAP_SIM_AT_MAC); |
| 395 | } |
| 396 | return eap_sim_msg_finish(msg, respDataLen, k_aut, (u8 *) "", 0); |
| 397 | } |
| 398 | |
| 399 | |
| 400 | static u8 * eap_sim_process_start(struct eap_sm *sm, struct eap_sim_data *data, |
| 401 | const struct eap_hdr *req, |
| 402 | size_t *respDataLen, |
| 403 | struct eap_sim_attrs *attr) |
| 404 | { |
| 405 | int selected_version = -1, id_error; |
| 406 | size_t i; |
| 407 | u8 *pos; |
| 408 | |
| 409 | wpa_printf(MSG_DEBUG, "EAP-SIM: subtype Start"); |
| 410 | if (attr->version_list == NULL) { |
| 411 | wpa_printf(MSG_INFO, "EAP-SIM: No AT_VERSION_LIST in " |
| 412 | "SIM/Start"); |
| 413 | return eap_sim_client_error(data, req, respDataLen, |
| 414 | EAP_SIM_UNSUPPORTED_VERSION); |
| 415 | } |
| 416 | |
| 417 | os_free(data->ver_list); |
| 418 | data->ver_list = os_malloc(attr->version_list_len); |
| 419 | if (data->ver_list == NULL) { |
| 420 | wpa_printf(MSG_DEBUG, "EAP-SIM: Failed to allocate " |
| 421 | "memory for version list"); |
| 422 | return eap_sim_client_error(data, req, respDataLen, |
| 423 | EAP_SIM_UNABLE_TO_PROCESS_PACKET); |
| 424 | } |
| 425 | os_memcpy(data->ver_list, attr->version_list, attr->version_list_len); |
| 426 | data->ver_list_len = attr->version_list_len; |
| 427 | pos = data->ver_list; |
| 428 | for (i = 0; i < data->ver_list_len / 2; i++) { |
| 429 | int ver = pos[0] * 256 + pos[1]; |
| 430 | pos += 2; |
| 431 | if (eap_sim_supported_ver(ver)) { |
| 432 | selected_version = ver; |
| 433 | break; |
| 434 | } |
| 435 | } |
| 436 | if (selected_version < 0) { |
| 437 | wpa_printf(MSG_INFO, "EAP-SIM: Could not find a supported " |
| 438 | "version"); |
| 439 | return eap_sim_client_error(data, req, respDataLen, |
| 440 | EAP_SIM_UNSUPPORTED_VERSION); |
| 441 | } |
| 442 | wpa_printf(MSG_DEBUG, "EAP-SIM: Selected Version %d", |
| 443 | selected_version); |
| 444 | data->selected_version = selected_version; |
| 445 | |
| 446 | id_error = 0; |
| 447 | switch (attr->id_req) { |
| 448 | case NO_ID_REQ: |
| 449 | break; |
| 450 | case ANY_ID: |
| 451 | if (data->num_id_req > 0) |
| 452 | id_error++; |
| 453 | data->num_id_req++; |
| 454 | break; |
| 455 | case FULLAUTH_ID: |
| 456 | if (data->num_id_req > 1) |
| 457 | id_error++; |
| 458 | data->num_id_req++; |
| 459 | break; |
| 460 | case PERMANENT_ID: |
| 461 | if (data->num_id_req > 2) |
| 462 | id_error++; |
| 463 | data->num_id_req++; |
| 464 | break; |
| 465 | } |
| 466 | if (id_error) { |
| 467 | wpa_printf(MSG_INFO, "EAP-SIM: Too many ID requests " |
| 468 | "used within one authentication"); |
| 469 | return eap_sim_client_error(data, req, respDataLen, |
| 470 | EAP_SIM_UNABLE_TO_PROCESS_PACKET); |
| 471 | } |
| 472 | |
| 473 | return eap_sim_response_start(sm, data, req, respDataLen, |
| 474 | attr->id_req); |
| 475 | } |
| 476 | |
| 477 | |
| 478 | static u8 * eap_sim_process_challenge(struct eap_sm *sm, |
| 479 | struct eap_sim_data *data, |
| 480 | const struct eap_hdr *req, |
| 481 | size_t reqDataLen, |
| 482 | size_t *respDataLen, |
| 483 | struct eap_sim_attrs *attr) |
| 484 | { |
| 485 | const u8 *identity; |
| 486 | size_t identity_len; |
| 487 | struct eap_sim_attrs eattr; |
| 488 | |
| 489 | wpa_printf(MSG_DEBUG, "EAP-SIM: subtype Challenge"); |
| 490 | data->reauth = 0; |
| 491 | if (!attr->mac || !attr->rand) { |
| 492 | wpa_printf(MSG_WARNING, "EAP-SIM: Challenge message " |
| 493 | "did not include%s%s", |
| 494 | !attr->mac ? " AT_MAC" : "", |
| 495 | !attr->rand ? " AT_RAND" : ""); |
| 496 | return eap_sim_client_error(data, req, respDataLen, |
| 497 | EAP_SIM_UNABLE_TO_PROCESS_PACKET); |
| 498 | } |
| 499 | |
| 500 | wpa_printf(MSG_DEBUG, "EAP-SIM: %lu challenges", |
| 501 | (unsigned long) attr->num_chal); |
| 502 | if (attr->num_chal < data->min_num_chal) { |
| 503 | wpa_printf(MSG_INFO, "EAP-SIM: Insufficient number of " |
| 504 | "challenges (%lu)", (unsigned long) attr->num_chal); |
| 505 | return eap_sim_client_error(data, req, respDataLen, |
| 506 | EAP_SIM_INSUFFICIENT_NUM_OF_CHAL); |
| 507 | } |
| 508 | if (attr->num_chal > 3) { |
| 509 | wpa_printf(MSG_INFO, "EAP-SIM: Too many challenges " |
| 510 | "(%lu)", (unsigned long) attr->num_chal); |
| 511 | return eap_sim_client_error(data, req, respDataLen, |
| 512 | EAP_SIM_UNABLE_TO_PROCESS_PACKET); |
| 513 | } |
| 514 | |
| 515 | /* Verify that RANDs are different */ |
| 516 | if (os_memcmp(attr->rand, attr->rand + GSM_RAND_LEN, |
| 517 | GSM_RAND_LEN) == 0 || |
| 518 | (attr->num_chal > 2 && |
| 519 | (os_memcmp(attr->rand, attr->rand + 2 * GSM_RAND_LEN, |
| 520 | GSM_RAND_LEN) == 0 || |
| 521 | os_memcmp(attr->rand + GSM_RAND_LEN, |
| 522 | attr->rand + 2 * GSM_RAND_LEN, |
| 523 | GSM_RAND_LEN) == 0))) { |
| 524 | wpa_printf(MSG_INFO, "EAP-SIM: Same RAND used multiple times"); |
| 525 | return eap_sim_client_error(data, req, respDataLen, |
| 526 | EAP_SIM_RAND_NOT_FRESH); |
| 527 | } |
| 528 | |
| 529 | os_memcpy(data->rand, attr->rand, attr->num_chal * GSM_RAND_LEN); |
| 530 | data->num_chal = attr->num_chal; |
| 531 | |
| 532 | if (eap_sim_gsm_auth(sm, data)) { |
| 533 | wpa_printf(MSG_WARNING, "EAP-SIM: GSM authentication failed"); |
| 534 | return eap_sim_client_error(data, req, respDataLen, |
| 535 | EAP_SIM_UNABLE_TO_PROCESS_PACKET); |
| 536 | } |
| 537 | if (data->last_eap_identity) { |
| 538 | identity = data->last_eap_identity; |
| 539 | identity_len = data->last_eap_identity_len; |
| 540 | } else if (data->pseudonym) { |
| 541 | identity = data->pseudonym; |
| 542 | identity_len = data->pseudonym_len; |
| 543 | } else |
| 544 | identity = eap_get_config_identity(sm, &identity_len); |
| 545 | wpa_hexdump_ascii(MSG_DEBUG, "EAP-SIM: Selected identity for MK " |
| 546 | "derivation", identity, identity_len); |
| 547 | eap_sim_derive_mk(identity, identity_len, data->nonce_mt, |
| 548 | data->selected_version, data->ver_list, |
| 549 | data->ver_list_len, data->num_chal, |
| 550 | (const u8 *) data->kc, data->mk); |
| 551 | eap_sim_derive_keys(data->mk, data->k_encr, data->k_aut, data->msk, |
| 552 | data->emsk); |
| 553 | if (eap_sim_verify_mac(data->k_aut, (const u8 *) req, reqDataLen, |
| 554 | attr->mac, data->nonce_mt, |
| 555 | EAP_SIM_NONCE_MT_LEN)) { |
| 556 | wpa_printf(MSG_WARNING, "EAP-SIM: Challenge message " |
| 557 | "used invalid AT_MAC"); |
| 558 | return eap_sim_client_error(data, req, respDataLen, |
| 559 | EAP_SIM_UNABLE_TO_PROCESS_PACKET); |
| 560 | } |
| 561 | |
| 562 | /* Old reauthentication and pseudonym identities must not be used |
| 563 | * anymore. In other words, if no new identities are received, full |
| 564 | * authentication will be used on next reauthentication. */ |
| 565 | eap_sim_clear_identities(data, CLEAR_PSEUDONYM | CLEAR_REAUTH_ID | |
| 566 | CLEAR_EAP_ID); |
| 567 | |
| 568 | if (attr->encr_data) { |
| 569 | u8 *decrypted; |
| 570 | decrypted = eap_sim_parse_encr(data->k_encr, attr->encr_data, |
| 571 | attr->encr_data_len, attr->iv, |
| 572 | &eattr, 0); |
| 573 | if (decrypted == NULL) { |
| 574 | return eap_sim_client_error( |
| 575 | data, req, respDataLen, |
| 576 | EAP_SIM_UNABLE_TO_PROCESS_PACKET); |
| 577 | } |
| 578 | eap_sim_learn_ids(data, &eattr); |
| 579 | os_free(decrypted); |
| 580 | } |
| 581 | |
| 582 | if (data->state != FAILURE) |
| 583 | data->state = SUCCESS; |
| 584 | |
| 585 | data->num_id_req = 0; |
| 586 | data->num_notification = 0; |
| 587 | /* RFC 4186 specifies that counter is initialized to one after |
| 588 | * fullauth, but initializing it to zero makes it easier to implement |
| 589 | * reauth verification. */ |
| 590 | data->counter = 0; |
| 591 | return eap_sim_response_challenge(data, req, respDataLen); |
| 592 | } |
| 593 | |
| 594 | |
| 595 | static int eap_sim_process_notification_reauth(struct eap_sim_data *data, |
| 596 | struct eap_sim_attrs *attr) |
| 597 | { |
| 598 | struct eap_sim_attrs eattr; |
| 599 | u8 *decrypted; |
| 600 | |
| 601 | if (attr->encr_data == NULL || attr->iv == NULL) { |
| 602 | wpa_printf(MSG_WARNING, "EAP-SIM: Notification message after " |
| 603 | "reauth did not include encrypted data"); |
| 604 | return -1; |
| 605 | } |
| 606 | |
| 607 | decrypted = eap_sim_parse_encr(data->k_encr, attr->encr_data, |
| 608 | attr->encr_data_len, attr->iv, &eattr, |
| 609 | 0); |
| 610 | if (decrypted == NULL) { |
| 611 | wpa_printf(MSG_WARNING, "EAP-SIM: Failed to parse encrypted " |
| 612 | "data from notification message"); |
| 613 | return -1; |
| 614 | } |
| 615 | |
| 616 | if (eattr.counter < 0 || (size_t) eattr.counter != data->counter) { |
| 617 | wpa_printf(MSG_WARNING, "EAP-SIM: Counter in notification " |
| 618 | "message does not match with counter in reauth " |
| 619 | "message"); |
| 620 | os_free(decrypted); |
| 621 | return -1; |
| 622 | } |
| 623 | |
| 624 | os_free(decrypted); |
| 625 | return 0; |
| 626 | } |
| 627 | |
| 628 | |
| 629 | static int eap_sim_process_notification_auth(struct eap_sim_data *data, |
| 630 | const struct eap_hdr *req, |
| 631 | size_t reqDataLen, |
| 632 | struct eap_sim_attrs *attr) |
| 633 | { |
| 634 | if (attr->mac == NULL) { |
| 635 | wpa_printf(MSG_INFO, "EAP-SIM: no AT_MAC in after_auth " |
| 636 | "Notification message"); |
| 637 | return -1; |
| 638 | } |
| 639 | |
| 640 | if (eap_sim_verify_mac(data->k_aut, (u8 *) req, reqDataLen, attr->mac, |
| 641 | (u8 *) "", 0)) { |
| 642 | wpa_printf(MSG_WARNING, "EAP-SIM: Notification message " |
| 643 | "used invalid AT_MAC"); |
| 644 | return -1; |
| 645 | } |
| 646 | |
| 647 | if (data->reauth && |
| 648 | eap_sim_process_notification_reauth(data, attr)) { |
| 649 | wpa_printf(MSG_WARNING, "EAP-SIM: Invalid notification " |
| 650 | "message after reauth"); |
| 651 | return -1; |
| 652 | } |
| 653 | |
| 654 | return 0; |
| 655 | } |
| 656 | |
| 657 | |
| 658 | static u8 * eap_sim_process_notification(struct eap_sm *sm, |
| 659 | struct eap_sim_data *data, |
| 660 | const struct eap_hdr *req, |
| 661 | size_t reqDataLen, |
| 662 | size_t *respDataLen, |
| 663 | struct eap_sim_attrs *attr) |
| 664 | { |
| 665 | wpa_printf(MSG_DEBUG, "EAP-SIM: subtype Notification"); |
| 666 | if (data->num_notification > 0) { |
| 667 | wpa_printf(MSG_INFO, "EAP-SIM: too many notification " |
| 668 | "rounds (only one allowed)"); |
| 669 | return eap_sim_client_error(data, req, respDataLen, |
| 670 | EAP_SIM_UNABLE_TO_PROCESS_PACKET); |
| 671 | } |
| 672 | data->num_notification++; |
| 673 | if (attr->notification == -1) { |
| 674 | wpa_printf(MSG_INFO, "EAP-SIM: no AT_NOTIFICATION in " |
| 675 | "Notification message"); |
| 676 | return eap_sim_client_error(data, req, respDataLen, |
| 677 | EAP_SIM_UNABLE_TO_PROCESS_PACKET); |
| 678 | } |
| 679 | |
| 680 | if ((attr->notification & 0x4000) == 0 && |
| 681 | eap_sim_process_notification_auth(data, req, reqDataLen, attr)) { |
| 682 | return eap_sim_client_error(data, req, respDataLen, |
| 683 | EAP_SIM_UNABLE_TO_PROCESS_PACKET); |
| 684 | } |
| 685 | |
| 686 | eap_sim_report_notification(sm->msg_ctx, attr->notification, 0); |
| 687 | if (attr->notification >= 0 && attr->notification < 32768) { |
| 688 | data->state = FAILURE; |
| 689 | } |
| 690 | return eap_sim_response_notification(data, req, respDataLen, |
| 691 | attr->notification); |
| 692 | } |
| 693 | |
| 694 | |
| 695 | static u8 * eap_sim_process_reauthentication(struct eap_sm *sm, |
| 696 | struct eap_sim_data *data, |
| 697 | const struct eap_hdr *req, |
| 698 | size_t reqDataLen, |
| 699 | size_t *respDataLen, |
| 700 | struct eap_sim_attrs *attr) |
| 701 | { |
| 702 | struct eap_sim_attrs eattr; |
| 703 | u8 *decrypted; |
| 704 | |
| 705 | wpa_printf(MSG_DEBUG, "EAP-SIM: subtype Reauthentication"); |
| 706 | |
| 707 | if (data->reauth_id == NULL) { |
| 708 | wpa_printf(MSG_WARNING, "EAP-SIM: Server is trying " |
| 709 | "reauthentication, but no reauth_id available"); |
| 710 | return eap_sim_client_error(data, req, respDataLen, |
| 711 | EAP_SIM_UNABLE_TO_PROCESS_PACKET); |
| 712 | } |
| 713 | |
| 714 | data->reauth = 1; |
| 715 | if (eap_sim_verify_mac(data->k_aut, (const u8 *) req, reqDataLen, |
| 716 | attr->mac, (u8 *) "", 0)) { |
| 717 | wpa_printf(MSG_WARNING, "EAP-SIM: Reauthentication " |
| 718 | "did not have valid AT_MAC"); |
| 719 | return eap_sim_client_error(data, req, respDataLen, |
| 720 | EAP_SIM_UNABLE_TO_PROCESS_PACKET); |
| 721 | } |
| 722 | |
| 723 | if (attr->encr_data == NULL || attr->iv == NULL) { |
| 724 | wpa_printf(MSG_WARNING, "EAP-SIM: Reauthentication " |
| 725 | "message did not include encrypted data"); |
| 726 | return eap_sim_client_error(data, req, respDataLen, |
| 727 | EAP_SIM_UNABLE_TO_PROCESS_PACKET); |
| 728 | } |
| 729 | |
| 730 | decrypted = eap_sim_parse_encr(data->k_encr, attr->encr_data, |
| 731 | attr->encr_data_len, attr->iv, &eattr, |
| 732 | 0); |
| 733 | if (decrypted == NULL) { |
| 734 | wpa_printf(MSG_WARNING, "EAP-SIM: Failed to parse encrypted " |
| 735 | "data from reauthentication message"); |
| 736 | return eap_sim_client_error(data, req, respDataLen, |
| 737 | EAP_SIM_UNABLE_TO_PROCESS_PACKET); |
| 738 | } |
| 739 | |
| 740 | if (eattr.nonce_s == NULL || eattr.counter < 0) { |
| 741 | wpa_printf(MSG_INFO, "EAP-SIM: (encr) No%s%s in reauth packet", |
| 742 | !eattr.nonce_s ? " AT_NONCE_S" : "", |
| 743 | eattr.counter < 0 ? " AT_COUNTER" : ""); |
| 744 | os_free(decrypted); |
| 745 | return eap_sim_client_error(data, req, respDataLen, |
| 746 | EAP_SIM_UNABLE_TO_PROCESS_PACKET); |
| 747 | } |
| 748 | |
| 749 | if (eattr.counter < 0 || (size_t) eattr.counter <= data->counter) { |
| 750 | wpa_printf(MSG_INFO, "EAP-SIM: (encr) Invalid counter " |
| 751 | "(%d <= %d)", eattr.counter, data->counter); |
| 752 | data->counter_too_small = eattr.counter; |
| 753 | /* Reply using Re-auth w/ AT_COUNTER_TOO_SMALL. The current |
| 754 | * reauth_id must not be used to start a new reauthentication. |
| 755 | * However, since it was used in the last EAP-Response-Identity |
| 756 | * packet, it has to saved for the following fullauth to be |
| 757 | * used in MK derivation. */ |
| 758 | os_free(data->last_eap_identity); |
| 759 | data->last_eap_identity = data->reauth_id; |
| 760 | data->last_eap_identity_len = data->reauth_id_len; |
| 761 | data->reauth_id = NULL; |
| 762 | data->reauth_id_len = 0; |
| 763 | os_free(decrypted); |
| 764 | return eap_sim_response_reauth(data, req, respDataLen, 1); |
| 765 | } |
| 766 | data->counter = eattr.counter; |
| 767 | |
| 768 | os_memcpy(data->nonce_s, eattr.nonce_s, EAP_SIM_NONCE_S_LEN); |
| 769 | wpa_hexdump(MSG_DEBUG, "EAP-SIM: (encr) AT_NONCE_S", |
| 770 | data->nonce_s, EAP_SIM_NONCE_S_LEN); |
| 771 | |
| 772 | eap_sim_derive_keys_reauth(data->counter, |
| 773 | data->reauth_id, data->reauth_id_len, |
| 774 | data->nonce_s, data->mk, data->msk, |
| 775 | data->emsk); |
| 776 | eap_sim_clear_identities(data, CLEAR_REAUTH_ID | CLEAR_EAP_ID); |
| 777 | eap_sim_learn_ids(data, &eattr); |
| 778 | |
| 779 | if (data->state != FAILURE) |
| 780 | data->state = SUCCESS; |
| 781 | |
| 782 | data->num_id_req = 0; |
| 783 | data->num_notification = 0; |
| 784 | if (data->counter > EAP_SIM_MAX_FAST_REAUTHS) { |
| 785 | wpa_printf(MSG_DEBUG, "EAP-SIM: Maximum number of " |
| 786 | "fast reauths performed - force fullauth"); |
| 787 | eap_sim_clear_identities(data, CLEAR_REAUTH_ID | CLEAR_EAP_ID); |
| 788 | } |
| 789 | os_free(decrypted); |
| 790 | return eap_sim_response_reauth(data, req, respDataLen, 0); |
| 791 | } |
| 792 | |
| 793 | |
| 794 | static u8 * eap_sim_process(struct eap_sm *sm, void *priv, |
| 795 | struct eap_method_ret *ret, |
| 796 | const u8 *reqData, size_t reqDataLen, |
| 797 | size_t *respDataLen) |
| 798 | { |
| 799 | struct eap_sim_data *data = priv; |
| 800 | const struct eap_hdr *req; |
| 801 | u8 subtype, *res; |
| 802 | const u8 *pos; |
| 803 | struct eap_sim_attrs attr; |
| 804 | size_t len; |
| 805 | |
| 806 | wpa_hexdump(MSG_DEBUG, "EAP-SIM: EAP data", reqData, reqDataLen); |
| 807 | if (eap_get_config_identity(sm, &len) == NULL) { |
| 808 | wpa_printf(MSG_INFO, "EAP-SIM: Identity not configured"); |
| 809 | eap_sm_request_identity(sm); |
| 810 | ret->ignore = TRUE; |
| 811 | return NULL; |
| 812 | } |
| 813 | |
| 814 | pos = eap_hdr_validate(EAP_VENDOR_IETF, EAP_TYPE_SIM, |
| 815 | reqData, reqDataLen, &len); |
| 816 | if (pos == NULL || len < 1) { |
| 817 | ret->ignore = TRUE; |
| 818 | return NULL; |
| 819 | } |
| 820 | req = (const struct eap_hdr *) reqData; |
| 821 | len = be_to_host16(req->length); |
| 822 | |
| 823 | ret->ignore = FALSE; |
| 824 | ret->methodState = METHOD_MAY_CONT; |
| 825 | ret->decision = DECISION_FAIL; |
| 826 | ret->allowNotifications = TRUE; |
| 827 | |
| 828 | subtype = *pos++; |
| 829 | wpa_printf(MSG_DEBUG, "EAP-SIM: Subtype=%d", subtype); |
| 830 | pos += 2; /* Reserved */ |
| 831 | |
| 832 | if (eap_sim_parse_attr(pos, reqData + len, &attr, 0, 0)) { |
| 833 | res = eap_sim_client_error(data, req, respDataLen, |
| 834 | EAP_SIM_UNABLE_TO_PROCESS_PACKET); |
| 835 | goto done; |
| 836 | } |
| 837 | |
| 838 | switch (subtype) { |
| 839 | case EAP_SIM_SUBTYPE_START: |
| 840 | res = eap_sim_process_start(sm, data, req, |
| 841 | respDataLen, &attr); |
| 842 | break; |
| 843 | case EAP_SIM_SUBTYPE_CHALLENGE: |
| 844 | res = eap_sim_process_challenge(sm, data, req, len, |
| 845 | respDataLen, &attr); |
| 846 | break; |
| 847 | case EAP_SIM_SUBTYPE_NOTIFICATION: |
| 848 | res = eap_sim_process_notification(sm, data, req, len, |
| 849 | respDataLen, &attr); |
| 850 | break; |
| 851 | case EAP_SIM_SUBTYPE_REAUTHENTICATION: |
| 852 | res = eap_sim_process_reauthentication(sm, data, req, len, |
| 853 | respDataLen, &attr); |
| 854 | break; |
| 855 | case EAP_SIM_SUBTYPE_CLIENT_ERROR: |
| 856 | wpa_printf(MSG_DEBUG, "EAP-SIM: subtype Client-Error"); |
| 857 | res = eap_sim_client_error(data, req, respDataLen, |
| 858 | EAP_SIM_UNABLE_TO_PROCESS_PACKET); |
| 859 | break; |
| 860 | default: |
| 861 | wpa_printf(MSG_DEBUG, "EAP-SIM: Unknown subtype=%d", subtype); |
| 862 | res = eap_sim_client_error(data, req, respDataLen, |
| 863 | EAP_SIM_UNABLE_TO_PROCESS_PACKET); |
| 864 | break; |
| 865 | } |
| 866 | |
| 867 | done: |
| 868 | if (data->state == FAILURE) { |
| 869 | ret->decision = DECISION_FAIL; |
| 870 | ret->methodState = METHOD_DONE; |
| 871 | } else if (data->state == SUCCESS) { |
| 872 | ret->decision = DECISION_COND_SUCC; |
| 873 | ret->methodState = METHOD_DONE; |
| 874 | } |
| 875 | |
| 876 | if (ret->methodState == METHOD_DONE) { |
| 877 | ret->allowNotifications = FALSE; |
| 878 | } |
| 879 | |
| 880 | return res; |
| 881 | } |
| 882 | |
| 883 | |
| 884 | static Boolean eap_sim_has_reauth_data(struct eap_sm *sm, void *priv) |
| 885 | { |
| 886 | struct eap_sim_data *data = priv; |
| 887 | return data->pseudonym || data->reauth_id; |
| 888 | } |
| 889 | |
| 890 | |
| 891 | static void eap_sim_deinit_for_reauth(struct eap_sm *sm, void *priv) |
| 892 | { |
| 893 | struct eap_sim_data *data = priv; |
| 894 | eap_sim_clear_identities(data, CLEAR_EAP_ID); |
| 895 | } |
| 896 | |
| 897 | |
| 898 | static void * eap_sim_init_for_reauth(struct eap_sm *sm, void *priv) |
| 899 | { |
| 900 | struct eap_sim_data *data = priv; |
| 901 | if (hostapd_get_rand(data->nonce_mt, EAP_SIM_NONCE_MT_LEN)) { |
| 902 | wpa_printf(MSG_WARNING, "EAP-SIM: Failed to get random data " |
| 903 | "for NONCE_MT"); |
| 904 | os_free(data); |
| 905 | return NULL; |
| 906 | } |
| 907 | data->num_id_req = 0; |
| 908 | data->num_notification = 0; |
| 909 | data->state = CONTINUE; |
| 910 | return priv; |
| 911 | } |
| 912 | |
| 913 | |
| 914 | static const u8 * eap_sim_get_identity(struct eap_sm *sm, void *priv, |
| 915 | size_t *len) |
| 916 | { |
| 917 | struct eap_sim_data *data = priv; |
| 918 | |
| 919 | if (data->reauth_id) { |
| 920 | *len = data->reauth_id_len; |
| 921 | return data->reauth_id; |
| 922 | } |
| 923 | |
| 924 | if (data->pseudonym) { |
| 925 | *len = data->pseudonym_len; |
| 926 | return data->pseudonym; |
| 927 | } |
| 928 | |
| 929 | return NULL; |
| 930 | } |
| 931 | |
| 932 | |
| 933 | static Boolean eap_sim_isKeyAvailable(struct eap_sm *sm, void *priv) |
| 934 | { |
| 935 | struct eap_sim_data *data = priv; |
| 936 | return data->state == SUCCESS; |
| 937 | } |
| 938 | |
| 939 | |
| 940 | static u8 * eap_sim_getKey(struct eap_sm *sm, void *priv, size_t *len) |
| 941 | { |
| 942 | struct eap_sim_data *data = priv; |
| 943 | u8 *key; |
| 944 | |
| 945 | if (data->state != SUCCESS) |
| 946 | return NULL; |
| 947 | |
| 948 | key = os_malloc(EAP_SIM_KEYING_DATA_LEN); |
| 949 | if (key == NULL) |
| 950 | return NULL; |
| 951 | |
| 952 | *len = EAP_SIM_KEYING_DATA_LEN; |
| 953 | os_memcpy(key, data->msk, EAP_SIM_KEYING_DATA_LEN); |
| 954 | |
| 955 | return key; |
| 956 | } |
| 957 | |
| 958 | |
| 959 | static u8 * eap_sim_get_emsk(struct eap_sm *sm, void *priv, size_t *len) |
| 960 | { |
| 961 | struct eap_sim_data *data = priv; |
| 962 | u8 *key; |
| 963 | |
| 964 | if (data->state != SUCCESS) |
| 965 | return NULL; |
| 966 | |
| 967 | key = os_malloc(EAP_EMSK_LEN); |
| 968 | if (key == NULL) |
| 969 | return NULL; |
| 970 | |
| 971 | *len = EAP_EMSK_LEN; |
| 972 | os_memcpy(key, data->emsk, EAP_EMSK_LEN); |
| 973 | |
| 974 | return key; |
| 975 | } |
| 976 | |
| 977 | |
| 978 | int eap_peer_sim_register(void) |
| 979 | { |
| 980 | struct eap_method *eap; |
| 981 | int ret; |
| 982 | |
| 983 | eap = eap_peer_method_alloc(EAP_PEER_METHOD_INTERFACE_VERSION, |
| 984 | EAP_VENDOR_IETF, EAP_TYPE_SIM, "SIM"); |
| 985 | if (eap == NULL) |
| 986 | return -1; |
| 987 | |
| 988 | eap->init = eap_sim_init; |
| 989 | eap->deinit = eap_sim_deinit; |
| 990 | eap->process = eap_sim_process; |
| 991 | eap->isKeyAvailable = eap_sim_isKeyAvailable; |
| 992 | eap->getKey = eap_sim_getKey; |
| 993 | eap->has_reauth_data = eap_sim_has_reauth_data; |
| 994 | eap->deinit_for_reauth = eap_sim_deinit_for_reauth; |
| 995 | eap->init_for_reauth = eap_sim_init_for_reauth; |
| 996 | eap->get_identity = eap_sim_get_identity; |
| 997 | eap->get_emsk = eap_sim_get_emsk; |
| 998 | |
| 999 | ret = eap_peer_method_register(eap); |
| 1000 | if (ret) |
| 1001 | eap_peer_method_free(eap); |
| 1002 | return ret; |
| 1003 | } |