contrib/wpa_supplicant/src/eap_peer/eap_fast.c

   1 /*
   2  * EAP peer method: EAP-FAST (RFC 4851)
   3  * Copyright (c) 2004-2015, 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 "crypto/tls.h"
  13 #include "crypto/sha1.h"
  14 #include "eap_common/eap_tlv_common.h"
  15 #include "eap_i.h"
  16 #include "eap_tls_common.h"
  17 #include "eap_config.h"
  18 #include "eap_fast_pac.h"
  19
  20 #ifdef EAP_FAST_DYNAMIC
  21 #include "eap_fast_pac.c"
  22 #endif /* EAP_FAST_DYNAMIC */
  23
  24 /* TODO:
  25  * - test session resumption and enable it if it interoperates
  26  * - password change (pending mschapv2 packet; replay decrypted packet)
  27  */
  28
  29
  30 static void eap_fast_deinit(struct eap_sm *sm, void *priv);
  31
  32
  33 struct eap_fast_data {
  34         struct eap_ssl_data ssl;
  35
  36         int fast_version;
  37
  38         const struct eap_method *phase2_method;
  39         void *phase2_priv;
  40         int phase2_success;
  41
  42         struct eap_method_type phase2_type;
  43         struct eap_method_type *phase2_types;
  44         size_t num_phase2_types;
  45         int resuming; /* starting a resumed session */
  46         struct eap_fast_key_block_provisioning *key_block_p;
  47 #define EAP_FAST_PROV_UNAUTH 1
  48 #define EAP_FAST_PROV_AUTH 2
  49         int provisioning_allowed; /* Allowed PAC provisioning modes */
  50         int provisioning; /* doing PAC provisioning (not the normal auth) */
  51         int anon_provisioning; /* doing anonymous (unauthenticated)
  52                                 * provisioning */
  53         int session_ticket_used;
  54
  55         u8 key_data[EAP_FAST_KEY_LEN];
  56         u8 *session_id;
  57         size_t id_len;
  58         u8 emsk[EAP_EMSK_LEN];
  59         int success;
  60
  61         struct eap_fast_pac *pac;
  62         struct eap_fast_pac *current_pac;
  63         size_t max_pac_list_len;
  64         int use_pac_binary_format;
  65
  66         u8 simck[EAP_FAST_SIMCK_LEN];
  67         int simck_idx;
  68
  69         struct wpabuf *pending_phase2_req;
  70         struct wpabuf *pending_resp;
  71 };
  72
  73
  74 static int eap_fast_session_ticket_cb(void *ctx, const u8 *ticket, size_t len,
  75                                       const u8 *client_random,
  76                                       const u8 *server_random,
  77                                       u8 *master_secret)
  78 {
  79         struct eap_fast_data *data = ctx;
  80
  81         wpa_printf(MSG_DEBUG, "EAP-FAST: SessionTicket callback");
  82
  83         if (client_random == NULL || server_random == NULL ||
  84             master_secret == NULL) {
  85                 wpa_printf(MSG_DEBUG, "EAP-FAST: SessionTicket failed - fall "
  86                            "back to full TLS handshake");
  87                 data->session_ticket_used = 0;
  88                 if (data->provisioning_allowed) {
  89                         wpa_printf(MSG_DEBUG, "EAP-FAST: Try to provision a "
  90                                    "new PAC-Key");
  91                         data->provisioning = 1;
  92                         data->current_pac = NULL;
  93                 }
  94                 return 0;
  95         }
  96
  97         wpa_hexdump(MSG_DEBUG, "EAP-FAST: SessionTicket", ticket, len);
  98
  99         if (data->current_pac == NULL) {
 100                 wpa_printf(MSG_DEBUG, "EAP-FAST: No PAC-Key available for "
 101                            "using SessionTicket");
 102                 data->session_ticket_used = 0;
 103                 return 0;
 104         }
 105
 106         eap_fast_derive_master_secret(data->current_pac->pac_key,
 107                                       server_random, client_random,
 108                                       master_secret);
 109
 110         data->session_ticket_used = 1;
 111
 112         return 1;
 113 }
 114
 115
 116 static void eap_fast_parse_phase1(struct eap_fast_data *data,
 117                                   const char *phase1)
 118 {
 119         const char *pos;
 120
 121         pos = os_strstr(phase1, "fast_provisioning=");
 122         if (pos) {
 123                 data->provisioning_allowed = atoi(pos + 18);
 124                 wpa_printf(MSG_DEBUG, "EAP-FAST: Automatic PAC provisioning "
 125                            "mode: %d", data->provisioning_allowed);
 126         }
 127
 128         pos = os_strstr(phase1, "fast_max_pac_list_len=");
 129         if (pos) {
 130                 data->max_pac_list_len = atoi(pos + 22);
 131                 if (data->max_pac_list_len == 0)
 132                         data->max_pac_list_len = 1;
 133                 wpa_printf(MSG_DEBUG, "EAP-FAST: Maximum PAC list length: %lu",
 134                            (unsigned long) data->max_pac_list_len);
 135         }
 136
 137         pos = os_strstr(phase1, "fast_pac_format=binary");
 138         if (pos) {
 139                 data->use_pac_binary_format = 1;
 140                 wpa_printf(MSG_DEBUG, "EAP-FAST: Using binary format for PAC "
 141                            "list");
 142         }
 143 }
 144
 145
 146 static void * eap_fast_init(struct eap_sm *sm)
 147 {
 148         struct eap_fast_data *data;
 149         struct eap_peer_config *config = eap_get_config(sm);
 150
 151         if (config == NULL)
 152                 return NULL;
 153
 154         data = os_zalloc(sizeof(*data));
 155         if (data == NULL)
 156                 return NULL;
 157         data->fast_version = EAP_FAST_VERSION;
 158         data->max_pac_list_len = 10;
 159
 160         if (config->phase1)
 161                 eap_fast_parse_phase1(data, config->phase1);
 162
 163         if (eap_peer_select_phase2_methods(config, "auth=",
 164                                            &data->phase2_types,
 165                                            &data->num_phase2_types) < 0) {
 166                 eap_fast_deinit(sm, data);
 167                 return NULL;
 168         }
 169
 170         data->phase2_type.vendor = EAP_VENDOR_IETF;
 171         data->phase2_type.method = EAP_TYPE_NONE;
 172
 173         if (eap_peer_tls_ssl_init(sm, &data->ssl, config, EAP_TYPE_FAST)) {
 174                 wpa_printf(MSG_INFO, "EAP-FAST: Failed to initialize SSL.");
 175                 eap_fast_deinit(sm, data);
 176                 return NULL;
 177         }
 178
 179         if (tls_connection_set_session_ticket_cb(sm->ssl_ctx, data->ssl.conn,
 180                                                  eap_fast_session_ticket_cb,
 181                                                  data) < 0) {
 182                 wpa_printf(MSG_INFO, "EAP-FAST: Failed to set SessionTicket "
 183                            "callback");
 184                 eap_fast_deinit(sm, data);
 185                 return NULL;
 186         }
 187
 188         /*
 189          * The local RADIUS server in a Cisco AP does not seem to like empty
 190          * fragments before data, so disable that workaround for CBC.
 191          * TODO: consider making this configurable
 192          */
 193         if (tls_connection_enable_workaround(sm->ssl_ctx, data->ssl.conn)) {
 194                 wpa_printf(MSG_DEBUG, "EAP-FAST: Failed to enable TLS "
 195                            "workarounds");
 196         }
 197
 198         if (!config->pac_file) {
 199                 wpa_printf(MSG_INFO, "EAP-FAST: No PAC file configured");
 200                 eap_fast_deinit(sm, data);
 201                 return NULL;
 202         }
 203
 204         if (data->use_pac_binary_format &&
 205             eap_fast_load_pac_bin(sm, &data->pac, config->pac_file) < 0) {
 206                 wpa_printf(MSG_INFO, "EAP-FAST: Failed to load PAC file");
 207                 eap_fast_deinit(sm, data);
 208                 return NULL;
 209         }
 210
 211         if (!data->use_pac_binary_format &&
 212             eap_fast_load_pac(sm, &data->pac, config->pac_file) < 0) {
 213                 wpa_printf(MSG_INFO, "EAP-FAST: Failed to load PAC file");
 214                 eap_fast_deinit(sm, data);
 215                 return NULL;
 216         }
 217         eap_fast_pac_list_truncate(data->pac, data->max_pac_list_len);
 218
 219         if (data->pac == NULL && !data->provisioning_allowed) {
 220                 wpa_printf(MSG_INFO, "EAP-FAST: No PAC configured and "
 221                            "provisioning disabled");
 222                 eap_fast_deinit(sm, data);
 223                 return NULL;
 224         }
 225
 226         return data;
 227 }
 228
 229
 230 static void eap_fast_deinit(struct eap_sm *sm, void *priv)
 231 {
 232         struct eap_fast_data *data = priv;
 233         struct eap_fast_pac *pac, *prev;
 234
 235         if (data == NULL)
 236                 return;
 237         if (data->phase2_priv && data->phase2_method)
 238                 data->phase2_method->deinit(sm, data->phase2_priv);
 239         os_free(data->phase2_types);
 240         os_free(data->key_block_p);
 241         eap_peer_tls_ssl_deinit(sm, &data->ssl);
 242
 243         pac = data->pac;
 244         prev = NULL;
 245         while (pac) {
 246                 prev = pac;
 247                 pac = pac->next;
 248                 eap_fast_free_pac(prev);
 249         }
 250         os_memset(data->key_data, 0, EAP_FAST_KEY_LEN);
 251         os_memset(data->emsk, 0, EAP_EMSK_LEN);
 252         os_free(data->session_id);
 253         wpabuf_clear_free(data->pending_phase2_req);
 254         wpabuf_clear_free(data->pending_resp);
 255         os_free(data);
 256 }
 257
 258
 259 static int eap_fast_derive_msk(struct eap_fast_data *data)
 260 {
 261         if (eap_fast_derive_eap_msk(data->simck, data->key_data) < 0 ||
 262             eap_fast_derive_eap_emsk(data->simck, data->emsk) < 0)
 263                 return -1;
 264         data->success = 1;
 265         return 0;
 266 }
 267
 268
 269 static int eap_fast_derive_key_auth(struct eap_sm *sm,
 270                                     struct eap_fast_data *data)
 271 {
 272         u8 *sks;
 273
 274         /* RFC 4851, Section 5.1:
 275          * Extra key material after TLS key_block: session_key_seed[40]
 276          */
 277
 278         sks = eap_fast_derive_key(sm->ssl_ctx, data->ssl.conn,
 279                                   EAP_FAST_SKS_LEN);
 280         if (sks == NULL) {
 281                 wpa_printf(MSG_DEBUG, "EAP-FAST: Failed to derive "
 282                            "session_key_seed");
 283                 return -1;
 284         }
 285
 286         /*
 287          * RFC 4851, Section 5.2:
 288          * S-IMCK[0] = session_key_seed
 289          */
 290         wpa_hexdump_key(MSG_DEBUG,
 291                         "EAP-FAST: session_key_seed (SKS = S-IMCK[0])",
 292                         sks, EAP_FAST_SKS_LEN);
 293         data->simck_idx = 0;
 294         os_memcpy(data->simck, sks, EAP_FAST_SIMCK_LEN);
 295         os_free(sks);
 296         return 0;
 297 }
 298
 299
 300 static int eap_fast_derive_key_provisioning(struct eap_sm *sm,
 301                                             struct eap_fast_data *data)
 302 {
 303         os_free(data->key_block_p);
 304         data->key_block_p = (struct eap_fast_key_block_provisioning *)
 305                 eap_fast_derive_key(sm->ssl_ctx, data->ssl.conn,
 306                                     sizeof(*data->key_block_p));
 307         if (data->key_block_p == NULL) {
 308                 wpa_printf(MSG_DEBUG, "EAP-FAST: Failed to derive key block");
 309                 return -1;
 310         }
 311         /*
 312          * RFC 4851, Section 5.2:
 313          * S-IMCK[0] = session_key_seed
 314          */
 315         wpa_hexdump_key(MSG_DEBUG,
 316                         "EAP-FAST: session_key_seed (SKS = S-IMCK[0])",
 317                         data->key_block_p->session_key_seed,
 318                         sizeof(data->key_block_p->session_key_seed));
 319         data->simck_idx = 0;
 320         os_memcpy(data->simck, data->key_block_p->session_key_seed,
 321                   EAP_FAST_SIMCK_LEN);
 322         wpa_hexdump_key(MSG_DEBUG, "EAP-FAST: server_challenge",
 323                         data->key_block_p->server_challenge,
 324                         sizeof(data->key_block_p->server_challenge));
 325         wpa_hexdump_key(MSG_DEBUG, "EAP-FAST: client_challenge",
 326                         data->key_block_p->client_challenge,
 327                         sizeof(data->key_block_p->client_challenge));
 328         return 0;
 329 }
 330
 331
 332 static int eap_fast_derive_keys(struct eap_sm *sm, struct eap_fast_data *data)
 333 {
 334         int res;
 335
 336         if (data->anon_provisioning)
 337                 res = eap_fast_derive_key_provisioning(sm, data);
 338         else
 339                 res = eap_fast_derive_key_auth(sm, data);
 340         return res;
 341 }
 342
 343
 344 static int eap_fast_init_phase2_method(struct eap_sm *sm,
 345                                        struct eap_fast_data *data)
 346 {
 347         data->phase2_method =
 348                 eap_peer_get_eap_method(data->phase2_type.vendor,
 349                                         data->phase2_type.method);
 350         if (data->phase2_method == NULL)
 351                 return -1;
 352
 353         if (data->key_block_p) {
 354                 sm->auth_challenge = data->key_block_p->server_challenge;
 355                 sm->peer_challenge = data->key_block_p->client_challenge;
 356         }
 357         sm->init_phase2 = 1;
 358         data->phase2_priv = data->phase2_method->init(sm);
 359         sm->init_phase2 = 0;
 360         sm->auth_challenge = NULL;
 361         sm->peer_challenge = NULL;
 362
 363         return data->phase2_priv == NULL ? -1 : 0;
 364 }
 365
 366
 367 static int eap_fast_select_phase2_method(struct eap_fast_data *data, u8 type)
 368 {
 369         size_t i;
 370
 371         /* TODO: TNC with anonymous provisioning; need to require both
 372          * completed MSCHAPv2 and TNC */
 373
 374         if (data->anon_provisioning && type != EAP_TYPE_MSCHAPV2) {
 375                 wpa_printf(MSG_INFO, "EAP-FAST: Only EAP-MSCHAPv2 is allowed "
 376                            "during unauthenticated provisioning; reject phase2"
 377                            " type %d", type);
 378                 return -1;
 379         }
 380
 381 #ifdef EAP_TNC
 382         if (type == EAP_TYPE_TNC) {
 383                 data->phase2_type.vendor = EAP_VENDOR_IETF;
 384                 data->phase2_type.method = EAP_TYPE_TNC;
 385                 wpa_printf(MSG_DEBUG, "EAP-FAST: Selected Phase 2 EAP "
 386                            "vendor %d method %d for TNC",
 387                            data->phase2_type.vendor,
 388                            data->phase2_type.method);
 389                 return 0;
 390         }
 391 #endif /* EAP_TNC */
 392
 393         for (i = 0; i < data->num_phase2_types; i++) {
 394                 if (data->phase2_types[i].vendor != EAP_VENDOR_IETF ||
 395                     data->phase2_types[i].method != type)
 396                         continue;
 397
 398                 data->phase2_type.vendor = data->phase2_types[i].vendor;
 399                 data->phase2_type.method = data->phase2_types[i].method;
 400                 wpa_printf(MSG_DEBUG, "EAP-FAST: Selected Phase 2 EAP "
 401                            "vendor %d method %d",
 402                            data->phase2_type.vendor,
 403                            data->phase2_type.method);
 404                 break;
 405         }
 406
 407         if (type != data->phase2_type.method || type == EAP_TYPE_NONE)
 408                 return -1;
 409
 410         return 0;
 411 }
 412
 413
 414 static int eap_fast_phase2_request(struct eap_sm *sm,
 415                                    struct eap_fast_data *data,
 416                                    struct eap_method_ret *ret,
 417                                    struct eap_hdr *hdr,
 418                                    struct wpabuf **resp)
 419 {
 420         size_t len = be_to_host16(hdr->length);
 421         u8 *pos;
 422         struct eap_method_ret iret;
 423         struct eap_peer_config *config = eap_get_config(sm);
 424         struct wpabuf msg;
 425
 426         if (len <= sizeof(struct eap_hdr)) {
 427                 wpa_printf(MSG_INFO, "EAP-FAST: too short "
 428                            "Phase 2 request (len=%lu)", (unsigned long) len);
 429                 return -1;
 430         }
 431         pos = (u8 *) (hdr + 1);
 432         wpa_printf(MSG_DEBUG, "EAP-FAST: Phase 2 Request: type=%d", *pos);
 433         if (*pos == EAP_TYPE_IDENTITY) {
 434                 *resp = eap_sm_buildIdentity(sm, hdr->identifier, 1);
 435                 return 0;
 436         }
 437
 438         if (data->phase2_priv && data->phase2_method &&
 439             *pos != data->phase2_type.method) {
 440                 wpa_printf(MSG_DEBUG, "EAP-FAST: Phase 2 EAP sequence - "
 441                            "deinitialize previous method");
 442                 data->phase2_method->deinit(sm, data->phase2_priv);
 443                 data->phase2_method = NULL;
 444                 data->phase2_priv = NULL;
 445                 data->phase2_type.vendor = EAP_VENDOR_IETF;
 446                 data->phase2_type.method = EAP_TYPE_NONE;
 447         }
 448
 449         if (data->phase2_type.vendor == EAP_VENDOR_IETF &&
 450             data->phase2_type.method == EAP_TYPE_NONE &&
 451             eap_fast_select_phase2_method(data, *pos) < 0) {
 452                 if (eap_peer_tls_phase2_nak(data->phase2_types,
 453                                             data->num_phase2_types,
 454                                             hdr, resp))
 455                         return -1;
 456                 return 0;
 457         }
 458
 459         if ((data->phase2_priv == NULL &&
 460              eap_fast_init_phase2_method(sm, data) < 0) ||
 461             data->phase2_method == NULL) {
 462                 wpa_printf(MSG_INFO, "EAP-FAST: Failed to initialize "
 463                            "Phase 2 EAP method %d", *pos);
 464                 ret->methodState = METHOD_DONE;
 465                 ret->decision = DECISION_FAIL;
 466                 return -1;
 467         }
 468
 469         os_memset(&iret, 0, sizeof(iret));
 470         wpabuf_set(&msg, hdr, len);
 471         *resp = data->phase2_method->process(sm, data->phase2_priv, &iret,
 472                                              &msg);
 473         if (*resp == NULL ||
 474             (iret.methodState == METHOD_DONE &&
 475              iret.decision == DECISION_FAIL)) {
 476                 ret->methodState = METHOD_DONE;
 477                 ret->decision = DECISION_FAIL;
 478         } else if ((iret.methodState == METHOD_DONE ||
 479                     iret.methodState == METHOD_MAY_CONT) &&
 480                    (iret.decision == DECISION_UNCOND_SUCC ||
 481                     iret.decision == DECISION_COND_SUCC)) {
 482                 data->phase2_success = 1;
 483         }
 484
 485         if (*resp == NULL && config &&
 486             (config->pending_req_identity || config->pending_req_password ||
 487              config->pending_req_otp || config->pending_req_new_password ||
 488              config->pending_req_sim)) {
 489                 wpabuf_clear_free(data->pending_phase2_req);
 490                 data->pending_phase2_req = wpabuf_alloc_copy(hdr, len);
 491         } else if (*resp == NULL)
 492                 return -1;
 493
 494         return 0;
 495 }
 496
 497
 498 static struct wpabuf * eap_fast_tlv_nak(int vendor_id, int tlv_type)
 499 {
 500         struct wpabuf *buf;
 501         struct eap_tlv_nak_tlv *nak;
 502         buf = wpabuf_alloc(sizeof(*nak));
 503         if (buf == NULL)
 504                 return NULL;
 505         nak = wpabuf_put(buf, sizeof(*nak));
 506         nak->tlv_type = host_to_be16(EAP_TLV_TYPE_MANDATORY | EAP_TLV_NAK_TLV);
 507         nak->length = host_to_be16(6);
 508         nak->vendor_id = host_to_be32(vendor_id);
 509         nak->nak_type = host_to_be16(tlv_type);
 510         return buf;
 511 }
 512
 513
 514 static struct wpabuf * eap_fast_tlv_result(int status, int intermediate)
 515 {
 516         struct wpabuf *buf;
 517         struct eap_tlv_intermediate_result_tlv *result;
 518         buf = wpabuf_alloc(sizeof(*result));
 519         if (buf == NULL)
 520                 return NULL;
 521         wpa_printf(MSG_DEBUG, "EAP-FAST: Add %sResult TLV(status=%d)",
 522                    intermediate ? "Intermediate " : "", status);
 523         result = wpabuf_put(buf, sizeof(*result));
 524         result->tlv_type = host_to_be16(EAP_TLV_TYPE_MANDATORY |
 525                                         (intermediate ?
 526                                          EAP_TLV_INTERMEDIATE_RESULT_TLV :
 527                                          EAP_TLV_RESULT_TLV));
 528         result->length = host_to_be16(2);
 529         result->status = host_to_be16(status);
 530         return buf;
 531 }
 532
 533
 534 static struct wpabuf * eap_fast_tlv_pac_ack(void)
 535 {
 536         struct wpabuf *buf;
 537         struct eap_tlv_result_tlv *res;
 538         struct eap_tlv_pac_ack_tlv *ack;
 539
 540         buf = wpabuf_alloc(sizeof(*res) + sizeof(*ack));
 541         if (buf == NULL)
 542                 return NULL;
 543
 544         wpa_printf(MSG_DEBUG, "EAP-FAST: Add PAC TLV (ack)");
 545         ack = wpabuf_put(buf, sizeof(*ack));
 546         ack->tlv_type = host_to_be16(EAP_TLV_PAC_TLV |
 547                                      EAP_TLV_TYPE_MANDATORY);
 548         ack->length = host_to_be16(sizeof(*ack) - sizeof(struct eap_tlv_hdr));
 549         ack->pac_type = host_to_be16(PAC_TYPE_PAC_ACKNOWLEDGEMENT);
 550         ack->pac_len = host_to_be16(2);
 551         ack->result = host_to_be16(EAP_TLV_RESULT_SUCCESS);
 552
 553         return buf;
 554 }
 555
 556
 557 static struct wpabuf * eap_fast_process_eap_payload_tlv(
 558         struct eap_sm *sm, struct eap_fast_data *data,
 559         struct eap_method_ret *ret,
 560         u8 *eap_payload_tlv, size_t eap_payload_tlv_len)
 561 {
 562         struct eap_hdr *hdr;
 563         struct wpabuf *resp = NULL;
 564
 565         if (eap_payload_tlv_len < sizeof(*hdr)) {
 566                 wpa_printf(MSG_DEBUG, "EAP-FAST: too short EAP "
 567                            "Payload TLV (len=%lu)",
 568                            (unsigned long) eap_payload_tlv_len);
 569                 return NULL;
 570         }
 571
 572         hdr = (struct eap_hdr *) eap_payload_tlv;
 573         if (be_to_host16(hdr->length) > eap_payload_tlv_len) {
 574                 wpa_printf(MSG_DEBUG, "EAP-FAST: EAP packet overflow in "
 575                            "EAP Payload TLV");
 576                 return NULL;
 577         }
 578
 579         if (hdr->code != EAP_CODE_REQUEST) {
 580                 wpa_printf(MSG_INFO, "EAP-FAST: Unexpected code=%d in "
 581                            "Phase 2 EAP header", hdr->code);
 582                 return NULL;
 583         }
 584
 585         if (eap_fast_phase2_request(sm, data, ret, hdr, &resp)) {
 586                 wpa_printf(MSG_INFO, "EAP-FAST: Phase2 Request processing "
 587                            "failed");
 588                 return NULL;
 589         }
 590
 591         return eap_fast_tlv_eap_payload(resp);
 592 }
 593
 594
 595 static int eap_fast_validate_crypto_binding(
 596         struct eap_tlv_crypto_binding_tlv *_bind)
 597 {
 598         wpa_printf(MSG_DEBUG, "EAP-FAST: Crypto-Binding TLV: Version %d "
 599                    "Received Version %d SubType %d",
 600                    _bind->version, _bind->received_version, _bind->subtype);
 601         wpa_hexdump(MSG_MSGDUMP, "EAP-FAST: NONCE",
 602                     _bind->nonce, sizeof(_bind->nonce));
 603         wpa_hexdump(MSG_MSGDUMP, "EAP-FAST: Compound MAC",
 604                     _bind->compound_mac, sizeof(_bind->compound_mac));
 605
 606         if (_bind->version != EAP_FAST_VERSION ||
 607             _bind->received_version != EAP_FAST_VERSION ||
 608             _bind->subtype != EAP_TLV_CRYPTO_BINDING_SUBTYPE_REQUEST) {
 609                 wpa_printf(MSG_INFO, "EAP-FAST: Invalid version/subtype in "
 610                            "Crypto-Binding TLV: Version %d "
 611                            "Received Version %d SubType %d",
 612                            _bind->version, _bind->received_version,
 613                            _bind->subtype);
 614                 return -1;
 615         }
 616
 617         return 0;
 618 }
 619
 620
 621 static void eap_fast_write_crypto_binding(
 622         struct eap_tlv_crypto_binding_tlv *rbind,
 623         struct eap_tlv_crypto_binding_tlv *_bind, const u8 *cmk)
 624 {
 625         rbind->tlv_type = host_to_be16(EAP_TLV_TYPE_MANDATORY |
 626                                        EAP_TLV_CRYPTO_BINDING_TLV);
 627         rbind->length = host_to_be16(sizeof(*rbind) -
 628                                      sizeof(struct eap_tlv_hdr));
 629         rbind->version = EAP_FAST_VERSION;
 630         rbind->received_version = _bind->version;
 631         rbind->subtype = EAP_TLV_CRYPTO_BINDING_SUBTYPE_RESPONSE;
 632         os_memcpy(rbind->nonce, _bind->nonce, sizeof(_bind->nonce));
 633         inc_byte_array(rbind->nonce, sizeof(rbind->nonce));
 634         hmac_sha1(cmk, EAP_FAST_CMK_LEN, (u8 *) rbind, sizeof(*rbind),
 635                   rbind->compound_mac);
 636
 637         wpa_printf(MSG_DEBUG, "EAP-FAST: Reply Crypto-Binding TLV: Version %d "
 638                    "Received Version %d SubType %d",
 639                    rbind->version, rbind->received_version, rbind->subtype);
 640         wpa_hexdump(MSG_MSGDUMP, "EAP-FAST: NONCE",
 641                     rbind->nonce, sizeof(rbind->nonce));
 642         wpa_hexdump(MSG_MSGDUMP, "EAP-FAST: Compound MAC",
 643                     rbind->compound_mac, sizeof(rbind->compound_mac));
 644 }
 645
 646
 647 static int eap_fast_get_phase2_key(struct eap_sm *sm,
 648                                    struct eap_fast_data *data,
 649                                    u8 *isk, size_t isk_len)
 650 {
 651         u8 *key;
 652         size_t key_len;
 653
 654         os_memset(isk, 0, isk_len);
 655
 656         if (data->phase2_method == NULL || data->phase2_priv == NULL) {
 657                 wpa_printf(MSG_DEBUG, "EAP-FAST: Phase 2 method not "
 658                            "available");
 659                 return -1;
 660         }
 661
 662         if (data->phase2_method->isKeyAvailable == NULL ||
 663             data->phase2_method->getKey == NULL)
 664                 return 0;
 665
 666         if (!data->phase2_method->isKeyAvailable(sm, data->phase2_priv) ||
 667             (key = data->phase2_method->getKey(sm, data->phase2_priv,
 668                                                &key_len)) == NULL) {
 669                 wpa_printf(MSG_DEBUG, "EAP-FAST: Could not get key material "
 670                            "from Phase 2");
 671                 return -1;
 672         }
 673
 674         if (key_len > isk_len)
 675                 key_len = isk_len;
 676         if (key_len == 32 &&
 677             data->phase2_method->vendor == EAP_VENDOR_IETF &&
 678             data->phase2_method->method == EAP_TYPE_MSCHAPV2) {
 679                 /*
 680                  * EAP-FAST uses reverse order for MS-MPPE keys when deriving
 681                  * MSK from EAP-MSCHAPv2. Swap the keys here to get the correct
 682                  * ISK for EAP-FAST cryptobinding.
 683                  */
 684                 os_memcpy(isk, key + 16, 16);
 685                 os_memcpy(isk + 16, key, 16);
 686         } else
 687                 os_memcpy(isk, key, key_len);
 688         os_free(key);
 689
 690         return 0;
 691 }
 692
 693
 694 static int eap_fast_get_cmk(struct eap_sm *sm, struct eap_fast_data *data,
 695                             u8 *cmk)
 696 {
 697         u8 isk[32], imck[60];
 698
 699         wpa_printf(MSG_DEBUG, "EAP-FAST: Determining CMK[%d] for Compound MIC "
 700                    "calculation", data->simck_idx + 1);
 701
 702         /*
 703          * RFC 4851, Section 5.2:
 704          * IMCK[j] = T-PRF(S-IMCK[j-1], "Inner Methods Compound Keys",
 705          *                 MSK[j], 60)
 706          * S-IMCK[j] = first 40 octets of IMCK[j]
 707          * CMK[j] = last 20 octets of IMCK[j]
 708          */
 709
 710         if (eap_fast_get_phase2_key(sm, data, isk, sizeof(isk)) < 0)
 711                 return -1;
 712         wpa_hexdump_key(MSG_MSGDUMP, "EAP-FAST: ISK[j]", isk, sizeof(isk));
 713         if (sha1_t_prf(data->simck, EAP_FAST_SIMCK_LEN,
 714                        "Inner Methods Compound Keys",
 715                        isk, sizeof(isk), imck, sizeof(imck)) < 0)
 716                 return -1;
 717         data->simck_idx++;
 718         os_memcpy(data->simck, imck, EAP_FAST_SIMCK_LEN);
 719         wpa_hexdump_key(MSG_MSGDUMP, "EAP-FAST: S-IMCK[j]",
 720                         data->simck, EAP_FAST_SIMCK_LEN);
 721         os_memcpy(cmk, imck + EAP_FAST_SIMCK_LEN, EAP_FAST_CMK_LEN);
 722         wpa_hexdump_key(MSG_MSGDUMP, "EAP-FAST: CMK[j]",
 723                         cmk, EAP_FAST_CMK_LEN);
 724
 725         return 0;
 726 }
 727
 728
 729 static u8 * eap_fast_write_pac_request(u8 *pos, u16 pac_type)
 730 {
 731         struct eap_tlv_hdr *pac;
 732         struct eap_tlv_request_action_tlv *act;
 733         struct eap_tlv_pac_type_tlv *type;
 734
 735         act = (struct eap_tlv_request_action_tlv *) pos;
 736         act->tlv_type = host_to_be16(EAP_TLV_REQUEST_ACTION_TLV);
 737         act->length = host_to_be16(2);
 738         act->action = host_to_be16(EAP_TLV_ACTION_PROCESS_TLV);
 739
 740         pac = (struct eap_tlv_hdr *) (act + 1);
 741         pac->tlv_type = host_to_be16(EAP_TLV_PAC_TLV);
 742         pac->length = host_to_be16(sizeof(*type));
 743
 744         type = (struct eap_tlv_pac_type_tlv *) (pac + 1);
 745         type->tlv_type = host_to_be16(PAC_TYPE_PAC_TYPE);
 746         type->length = host_to_be16(2);
 747         type->pac_type = host_to_be16(pac_type);
 748
 749         return (u8 *) (type + 1);
 750 }
 751
 752
 753 static struct wpabuf * eap_fast_process_crypto_binding(
 754         struct eap_sm *sm, struct eap_fast_data *data,
 755         struct eap_method_ret *ret,
 756         struct eap_tlv_crypto_binding_tlv *_bind, size_t bind_len)
 757 {
 758         struct wpabuf *resp;
 759         u8 *pos;
 760         u8 cmk[EAP_FAST_CMK_LEN], cmac[SHA1_MAC_LEN];
 761         int res;
 762         size_t len;
 763
 764         if (eap_fast_validate_crypto_binding(_bind) < 0)
 765                 return NULL;
 766
 767         if (eap_fast_get_cmk(sm, data, cmk) < 0)
 768                 return NULL;
 769
 770         /* Validate received Compound MAC */
 771         os_memcpy(cmac, _bind->compound_mac, sizeof(cmac));
 772         os_memset(_bind->compound_mac, 0, sizeof(cmac));
 773         wpa_hexdump(MSG_MSGDUMP, "EAP-FAST: Crypto-Binding TLV for Compound "
 774                     "MAC calculation", (u8 *) _bind, bind_len);
 775         hmac_sha1(cmk, EAP_FAST_CMK_LEN, (u8 *) _bind, bind_len,
 776                   _bind->compound_mac);
 777         res = os_memcmp_const(cmac, _bind->compound_mac, sizeof(cmac));
 778         wpa_hexdump(MSG_MSGDUMP, "EAP-FAST: Received Compound MAC",
 779                     cmac, sizeof(cmac));
 780         wpa_hexdump(MSG_MSGDUMP, "EAP-FAST: Calculated Compound MAC",
 781                     _bind->compound_mac, sizeof(cmac));
 782         if (res != 0) {
 783                 wpa_printf(MSG_INFO, "EAP-FAST: Compound MAC did not match");
 784                 os_memcpy(_bind->compound_mac, cmac, sizeof(cmac));
 785                 return NULL;
 786         }
 787
 788         /*
 789          * Compound MAC was valid, so authentication succeeded. Reply with
 790          * crypto binding to allow server to complete authentication.
 791          */
 792
 793         len = sizeof(struct eap_tlv_crypto_binding_tlv);
 794         resp = wpabuf_alloc(len);
 795         if (resp == NULL)
 796                 return NULL;
 797
 798         if (!data->anon_provisioning && data->phase2_success &&
 799             eap_fast_derive_msk(data) < 0) {
 800                 wpa_printf(MSG_INFO, "EAP-FAST: Failed to generate MSK");
 801                 ret->methodState = METHOD_DONE;
 802                 ret->decision = DECISION_FAIL;
 803                 data->phase2_success = 0;
 804                 wpabuf_clear_free(resp);
 805                 return NULL;
 806         }
 807
 808         if (!data->anon_provisioning && data->phase2_success) {
 809                 os_free(data->session_id);
 810                 data->session_id = eap_peer_tls_derive_session_id(
 811                         sm, &data->ssl, EAP_TYPE_FAST, &data->id_len);
 812                 if (data->session_id) {
 813                         wpa_hexdump(MSG_DEBUG, "EAP-FAST: Derived Session-Id",
 814                                     data->session_id, data->id_len);
 815                 } else {
 816                         wpa_printf(MSG_ERROR, "EAP-FAST: Failed to derive "
 817                                    "Session-Id");
 818                         wpabuf_clear_free(resp);
 819                         return NULL;
 820                 }
 821         }
 822
 823         pos = wpabuf_put(resp, sizeof(struct eap_tlv_crypto_binding_tlv));
 824         eap_fast_write_crypto_binding((struct eap_tlv_crypto_binding_tlv *)
 825                                       pos, _bind, cmk);
 826
 827         return resp;
 828 }
 829
 830
 831 static void eap_fast_parse_pac_tlv(struct eap_fast_pac *entry, int type,
 832                                    u8 *pos, size_t len, int *pac_key_found)
 833 {
 834         switch (type & 0x7fff) {
 835         case PAC_TYPE_PAC_KEY:
 836                 wpa_hexdump_key(MSG_DEBUG, "EAP-FAST: PAC-Key", pos, len);
 837                 if (len != EAP_FAST_PAC_KEY_LEN) {
 838                         wpa_printf(MSG_DEBUG, "EAP-FAST: Invalid PAC-Key "
 839                                    "length %lu", (unsigned long) len);
 840                         break;
 841                 }
 842                 *pac_key_found = 1;
 843                 os_memcpy(entry->pac_key, pos, len);
 844                 break;
 845         case PAC_TYPE_PAC_OPAQUE:
 846                 wpa_hexdump(MSG_DEBUG, "EAP-FAST: PAC-Opaque", pos, len);
 847                 entry->pac_opaque = pos;
 848                 entry->pac_opaque_len = len;
 849                 break;
 850         case PAC_TYPE_PAC_INFO:
 851                 wpa_hexdump(MSG_DEBUG, "EAP-FAST: PAC-Info", pos, len);
 852                 entry->pac_info = pos;
 853                 entry->pac_info_len = len;
 854                 break;
 855         default:
 856                 wpa_printf(MSG_DEBUG, "EAP-FAST: Ignored unknown PAC type %d",
 857                            type);
 858                 break;
 859         }
 860 }
 861
 862
 863 static int eap_fast_process_pac_tlv(struct eap_fast_pac *entry,
 864                                     u8 *pac, size_t pac_len)
 865 {
 866         struct pac_tlv_hdr *hdr;
 867         u8 *pos;
 868         size_t left, len;
 869         int type, pac_key_found = 0;
 870
 871         pos = pac;
 872         left = pac_len;
 873
 874         while (left > sizeof(*hdr)) {
 875                 hdr = (struct pac_tlv_hdr *) pos;
 876                 type = be_to_host16(hdr->type);
 877                 len = be_to_host16(hdr->len);
 878                 pos += sizeof(*hdr);
 879                 left -= sizeof(*hdr);
 880                 if (len > left) {
 881                         wpa_printf(MSG_DEBUG, "EAP-FAST: PAC TLV overrun "
 882                                    "(type=%d len=%lu left=%lu)",
 883                                    type, (unsigned long) len,
 884                                    (unsigned long) left);
 885                         return -1;
 886                 }
 887
 888                 eap_fast_parse_pac_tlv(entry, type, pos, len, &pac_key_found);
 889
 890                 pos += len;
 891                 left -= len;
 892         }
 893
 894         if (!pac_key_found || !entry->pac_opaque || !entry->pac_info) {
 895                 wpa_printf(MSG_DEBUG, "EAP-FAST: PAC TLV does not include "
 896                            "all the required fields");
 897                 return -1;
 898         }
 899
 900         return 0;
 901 }
 902
 903
 904 static int eap_fast_parse_pac_info(struct eap_fast_pac *entry, int type,
 905                                    u8 *pos, size_t len)
 906 {
 907         u16 pac_type;
 908         u32 lifetime;
 909         struct os_time now;
 910
 911         switch (type & 0x7fff) {
 912         case PAC_TYPE_CRED_LIFETIME:
 913                 if (len != 4) {
 914                         wpa_hexdump(MSG_DEBUG, "EAP-FAST: PAC-Info - "
 915                                     "Invalid CRED_LIFETIME length - ignored",
 916                                     pos, len);
 917                         return 0;
 918                 }
 919
 920                 /*
 921                  * This is not currently saved separately in PAC files since
 922                  * the server can automatically initiate PAC update when
 923                  * needed. Anyway, the information is available from PAC-Info
 924                  * dump if it is needed for something in the future.
 925                  */
 926                 lifetime = WPA_GET_BE32(pos);
 927                 os_get_time(&now);
 928                 wpa_printf(MSG_DEBUG, "EAP-FAST: PAC-Info - CRED_LIFETIME %d "
 929                            "(%d days)",
 930                            lifetime, (lifetime - (u32) now.sec) / 86400);
 931                 break;
 932         case PAC_TYPE_A_ID:
 933                 wpa_hexdump_ascii(MSG_DEBUG, "EAP-FAST: PAC-Info - A-ID",
 934                                   pos, len);
 935                 entry->a_id = pos;
 936                 entry->a_id_len = len;
 937                 break;
 938         case PAC_TYPE_I_ID:
 939                 wpa_hexdump_ascii(MSG_DEBUG, "EAP-FAST: PAC-Info - I-ID",
 940                                   pos, len);
 941                 entry->i_id = pos;
 942                 entry->i_id_len = len;
 943                 break;
 944         case PAC_TYPE_A_ID_INFO:
 945                 wpa_hexdump_ascii(MSG_DEBUG, "EAP-FAST: PAC-Info - A-ID-Info",
 946                                   pos, len);
 947                 entry->a_id_info = pos;
 948                 entry->a_id_info_len = len;
 949                 break;
 950         case PAC_TYPE_PAC_TYPE:
 951                 /* RFC 5422, Section 4.2.6 - PAC-Type TLV */
 952                 if (len != 2) {
 953                         wpa_printf(MSG_INFO, "EAP-FAST: Invalid PAC-Type "
 954                                    "length %lu (expected 2)",
 955                                    (unsigned long) len);
 956                         wpa_hexdump_ascii(MSG_DEBUG,
 957                                           "EAP-FAST: PAC-Info - PAC-Type",
 958                                           pos, len);
 959                         return -1;
 960                 }
 961                 pac_type = WPA_GET_BE16(pos);
 962                 if (pac_type != PAC_TYPE_TUNNEL_PAC &&
 963                     pac_type != PAC_TYPE_USER_AUTHORIZATION &&
 964                     pac_type != PAC_TYPE_MACHINE_AUTHENTICATION) {
 965                         wpa_printf(MSG_INFO, "EAP-FAST: Unsupported PAC Type "
 966                                    "%d", pac_type);
 967                         return -1;
 968                 }
 969
 970                 wpa_printf(MSG_DEBUG, "EAP-FAST: PAC-Info - PAC-Type %d",
 971                            pac_type);
 972                 entry->pac_type = pac_type;
 973                 break;
 974         default:
 975                 wpa_printf(MSG_DEBUG, "EAP-FAST: Ignored unknown PAC-Info "
 976                            "type %d", type);
 977                 break;
 978         }
 979
 980         return 0;
 981 }
 982
 983
 984 static int eap_fast_process_pac_info(struct eap_fast_pac *entry)
 985 {
 986         struct pac_tlv_hdr *hdr;
 987         u8 *pos;
 988         size_t left, len;
 989         int type;
 990
 991         /* RFC 5422, Section 4.2.4 */
 992
 993         /* PAC-Type defaults to Tunnel PAC (Type 1) */
 994         entry->pac_type = PAC_TYPE_TUNNEL_PAC;
 995
 996         pos = entry->pac_info;
 997         left = entry->pac_info_len;
 998         while (left > sizeof(*hdr)) {
 999                 hdr = (struct pac_tlv_hdr *) pos;
1000                 type = be_to_host16(hdr->type);
1001                 len = be_to_host16(hdr->len);
1002                 pos += sizeof(*hdr);
1003                 left -= sizeof(*hdr);
1004                 if (len > left) {
1005                         wpa_printf(MSG_DEBUG, "EAP-FAST: PAC-Info overrun "
1006                                    "(type=%d len=%lu left=%lu)",
1007                                    type, (unsigned long) len,
1008                                    (unsigned long) left);
1009                         return -1;
1010                 }
1011
1012                 if (eap_fast_parse_pac_info(entry, type, pos, len) < 0)
1013                         return -1;
1014
1015                 pos += len;
1016                 left -= len;
1017         }
1018
1019         if (entry->a_id == NULL || entry->a_id_info == NULL) {
1020                 wpa_printf(MSG_DEBUG, "EAP-FAST: PAC-Info does not include "
1021                            "all the required fields");
1022                 return -1;
1023         }
1024
1025         return 0;
1026 }
1027
1028
1029 static struct wpabuf * eap_fast_process_pac(struct eap_sm *sm,
1030                                             struct eap_fast_data *data,
1031                                             struct eap_method_ret *ret,
1032                                             u8 *pac, size_t pac_len)
1033 {
1034         struct eap_peer_config *config = eap_get_config(sm);
1035         struct eap_fast_pac entry;
1036
1037         os_memset(&entry, 0, sizeof(entry));
1038         if (eap_fast_process_pac_tlv(&entry, pac, pac_len) ||
1039             eap_fast_process_pac_info(&entry))
1040                 return NULL;
1041
1042         eap_fast_add_pac(&data->pac, &data->current_pac, &entry);
1043         eap_fast_pac_list_truncate(data->pac, data->max_pac_list_len);
1044         if (data->use_pac_binary_format)
1045                 eap_fast_save_pac_bin(sm, data->pac, config->pac_file);
1046         else
1047                 eap_fast_save_pac(sm, data->pac, config->pac_file);
1048
1049         if (data->provisioning) {
1050                 if (data->anon_provisioning) {
1051                         /*
1052                          * Unauthenticated provisioning does not provide keying
1053                          * material and must end with an EAP-Failure.
1054                          * Authentication will be done separately after this.
1055                          */
1056                         data->success = 0;
1057                         ret->decision = DECISION_FAIL;
1058                 } else {
1059                         /*
1060                          * Server may or may not allow authenticated
1061                          * provisioning also for key generation.
1062                          */
1063                         ret->decision = DECISION_COND_SUCC;
1064                 }
1065                 wpa_printf(MSG_DEBUG, "EAP-FAST: Send PAC-Acknowledgement TLV "
1066                            "- Provisioning completed successfully");
1067                 sm->expected_failure = 1;
1068         } else {
1069                 /*
1070                  * This is PAC refreshing, i.e., normal authentication that is
1071                  * expected to be completed with an EAP-Success. However,
1072                  * RFC 5422, Section 3.5 allows EAP-Failure to be sent even
1073                  * after protected success exchange in case of EAP-Fast
1074                  * provisioning, so we better use DECISION_COND_SUCC here
1075                  * instead of DECISION_UNCOND_SUCC.
1076                  */
1077                 wpa_printf(MSG_DEBUG, "EAP-FAST: Send PAC-Acknowledgement TLV "
1078                            "- PAC refreshing completed successfully");
1079                 ret->decision = DECISION_COND_SUCC;
1080         }
1081         ret->methodState = METHOD_DONE;
1082         return eap_fast_tlv_pac_ack();
1083 }
1084
1085
1086 static int eap_fast_parse_decrypted(struct wpabuf *decrypted,
1087                                     struct eap_fast_tlv_parse *tlv,
1088                                     struct wpabuf **resp)
1089 {
1090         int mandatory, tlv_type, res;
1091         size_t len;
1092         u8 *pos, *end;
1093
1094         os_memset(tlv, 0, sizeof(*tlv));
1095
1096         /* Parse TLVs from the decrypted Phase 2 data */
1097         pos = wpabuf_mhead(decrypted);
1098         end = pos + wpabuf_len(decrypted);
1099         while (end - pos > 4) {
1100                 mandatory = pos[0] & 0x80;
1101                 tlv_type = WPA_GET_BE16(pos) & 0x3fff;
1102                 pos += 2;
1103                 len = WPA_GET_BE16(pos);
1104                 pos += 2;
1105                 if (len > (size_t) (end - pos)) {
1106                         wpa_printf(MSG_INFO, "EAP-FAST: TLV overflow");
1107                         return -1;
1108                 }
1109                 wpa_printf(MSG_DEBUG, "EAP-FAST: Received Phase 2: "
1110                            "TLV type %d length %u%s",
1111                            tlv_type, (unsigned int) len,
1112                            mandatory ? " (mandatory)" : "");
1113
1114                 res = eap_fast_parse_tlv(tlv, tlv_type, pos, len);
1115                 if (res == -2)
1116                         break;
1117                 if (res < 0) {
1118                         if (mandatory) {
1119                                 wpa_printf(MSG_DEBUG, "EAP-FAST: Nak unknown "
1120                                            "mandatory TLV type %d", tlv_type);
1121                                 *resp = eap_fast_tlv_nak(0, tlv_type);
1122                                 break;
1123                         } else {
1124                                 wpa_printf(MSG_DEBUG, "EAP-FAST: ignored "
1125                                            "unknown optional TLV type %d",
1126                                            tlv_type);
1127                         }
1128                 }
1129
1130                 pos += len;
1131         }
1132
1133         return 0;
1134 }
1135
1136
1137 static int eap_fast_encrypt_response(struct eap_sm *sm,
1138                                      struct eap_fast_data *data,
1139                                      struct wpabuf *resp,
1140                                      u8 identifier, struct wpabuf **out_data)
1141 {
1142         if (resp == NULL)
1143                 return 0;
1144
1145         wpa_hexdump_buf(MSG_DEBUG, "EAP-FAST: Encrypting Phase 2 data",
1146                         resp);
1147         if (eap_peer_tls_encrypt(sm, &data->ssl, EAP_TYPE_FAST,
1148                                  data->fast_version, identifier,
1149                                  resp, out_data)) {
1150                 wpa_printf(MSG_INFO, "EAP-FAST: Failed to encrypt a Phase 2 "
1151                            "frame");
1152         }
1153         wpabuf_clear_free(resp);
1154
1155         return 0;
1156 }
1157
1158
1159 static struct wpabuf * eap_fast_pac_request(void)
1160 {
1161         struct wpabuf *tmp;
1162         u8 *pos, *pos2;
1163
1164         tmp = wpabuf_alloc(sizeof(struct eap_tlv_hdr) +
1165                            sizeof(struct eap_tlv_request_action_tlv) +
1166                            sizeof(struct eap_tlv_pac_type_tlv));
1167         if (tmp == NULL)
1168                 return NULL;
1169
1170         pos = wpabuf_put(tmp, 0);
1171         pos2 = eap_fast_write_pac_request(pos, PAC_TYPE_TUNNEL_PAC);
1172         wpabuf_put(tmp, pos2 - pos);
1173         return tmp;
1174 }
1175
1176
1177 static int eap_fast_process_decrypted(struct eap_sm *sm,
1178                                       struct eap_fast_data *data,
1179                                       struct eap_method_ret *ret,
1180                                       u8 identifier,
1181                                       struct wpabuf *decrypted,
1182                                       struct wpabuf **out_data)
1183 {
1184         struct wpabuf *resp = NULL, *tmp;
1185         struct eap_fast_tlv_parse tlv;
1186         int failed = 0;
1187
1188         if (eap_fast_parse_decrypted(decrypted, &tlv, &resp) < 0)
1189                 return 0;
1190         if (resp)
1191                 return eap_fast_encrypt_response(sm, data, resp,
1192                                                  identifier, out_data);
1193
1194         if (tlv.result == EAP_TLV_RESULT_FAILURE) {
1195                 resp = eap_fast_tlv_result(EAP_TLV_RESULT_FAILURE, 0);
1196                 return eap_fast_encrypt_response(sm, data, resp,
1197                                                  identifier, out_data);
1198         }
1199
1200         if (tlv.iresult == EAP_TLV_RESULT_FAILURE) {
1201                 resp = eap_fast_tlv_result(EAP_TLV_RESULT_FAILURE, 1);
1202                 return eap_fast_encrypt_response(sm, data, resp,
1203                                                  identifier, out_data);
1204         }
1205
1206         if (tlv.crypto_binding) {
1207                 tmp = eap_fast_process_crypto_binding(sm, data, ret,
1208                                                       tlv.crypto_binding,
1209                                                       tlv.crypto_binding_len);
1210                 if (tmp == NULL)
1211                         failed = 1;
1212                 else
1213                         resp = wpabuf_concat(resp, tmp);
1214         }
1215
1216         if (tlv.iresult == EAP_TLV_RESULT_SUCCESS) {
1217                 tmp = eap_fast_tlv_result(failed ? EAP_TLV_RESULT_FAILURE :
1218                                           EAP_TLV_RESULT_SUCCESS, 1);
1219                 resp = wpabuf_concat(resp, tmp);
1220         }
1221
1222         if (tlv.eap_payload_tlv) {
1223                 tmp = eap_fast_process_eap_payload_tlv(
1224                         sm, data, ret, tlv.eap_payload_tlv,
1225                         tlv.eap_payload_tlv_len);
1226                 resp = wpabuf_concat(resp, tmp);
1227         }
1228
1229         if (tlv.pac && tlv.result != EAP_TLV_RESULT_SUCCESS) {
1230                 wpa_printf(MSG_DEBUG, "EAP-FAST: PAC TLV without Result TLV "
1231                            "acknowledging success");
1232                 failed = 1;
1233         } else if (tlv.pac && tlv.result == EAP_TLV_RESULT_SUCCESS) {
1234                 tmp = eap_fast_process_pac(sm, data, ret, tlv.pac,
1235                                            tlv.pac_len);
1236                 resp = wpabuf_concat(resp, tmp);
1237         }
1238
1239         if (data->current_pac == NULL && data->provisioning &&
1240             !data->anon_provisioning && !tlv.pac &&
1241             (tlv.iresult == EAP_TLV_RESULT_SUCCESS ||
1242              tlv.result == EAP_TLV_RESULT_SUCCESS)) {
1243                 /*
1244                  * Need to request Tunnel PAC when using authenticated
1245                  * provisioning.
1246                  */
1247                 wpa_printf(MSG_DEBUG, "EAP-FAST: Request Tunnel PAC");
1248                 tmp = eap_fast_pac_request();
1249                 resp = wpabuf_concat(resp, tmp);
1250         }
1251
1252         if (tlv.result == EAP_TLV_RESULT_SUCCESS && !failed) {
1253                 tmp = eap_fast_tlv_result(EAP_TLV_RESULT_SUCCESS, 0);
1254                 resp = wpabuf_concat(tmp, resp);
1255         } else if (failed) {
1256                 tmp = eap_fast_tlv_result(EAP_TLV_RESULT_FAILURE, 0);
1257                 resp = wpabuf_concat(tmp, resp);
1258         }
1259
1260         if (resp && tlv.result == EAP_TLV_RESULT_SUCCESS && !failed &&
1261             tlv.crypto_binding && data->phase2_success) {
1262                 if (data->anon_provisioning) {
1263                         wpa_printf(MSG_DEBUG, "EAP-FAST: Unauthenticated "
1264                                    "provisioning completed successfully.");
1265                         ret->methodState = METHOD_DONE;
1266                         ret->decision = DECISION_FAIL;
1267                         sm->expected_failure = 1;
1268                 } else {
1269                         wpa_printf(MSG_DEBUG, "EAP-FAST: Authentication "
1270                                    "completed successfully.");
1271                         if (data->provisioning)
1272                                 ret->methodState = METHOD_MAY_CONT;
1273                         else
1274                                 ret->methodState = METHOD_DONE;
1275                         ret->decision = DECISION_UNCOND_SUCC;
1276                 }
1277         }
1278
1279         if (resp == NULL) {
1280                 wpa_printf(MSG_DEBUG, "EAP-FAST: No recognized TLVs - send "
1281                            "empty response packet");
1282                 resp = wpabuf_alloc(1);
1283         }
1284
1285         return eap_fast_encrypt_response(sm, data, resp, identifier,
1286                                          out_data);
1287 }
1288
1289
1290 static int eap_fast_decrypt(struct eap_sm *sm, struct eap_fast_data *data,
1291                             struct eap_method_ret *ret, u8 identifier,
1292                             const struct wpabuf *in_data,
1293                             struct wpabuf **out_data)
1294 {
1295         struct wpabuf *in_decrypted;
1296         int res;
1297
1298         wpa_printf(MSG_DEBUG, "EAP-FAST: Received %lu bytes encrypted data for"
1299                    " Phase 2", (unsigned long) wpabuf_len(in_data));
1300
1301         if (data->pending_phase2_req) {
1302                 wpa_printf(MSG_DEBUG, "EAP-FAST: Pending Phase 2 request - "
1303                            "skip decryption and use old data");
1304                 /* Clear TLS reassembly state. */
1305                 eap_peer_tls_reset_input(&data->ssl);
1306
1307                 in_decrypted = data->pending_phase2_req;
1308                 data->pending_phase2_req = NULL;
1309                 goto continue_req;
1310         }
1311
1312         if (wpabuf_len(in_data) == 0) {
1313                 /* Received TLS ACK - requesting more fragments */
1314                 return eap_peer_tls_encrypt(sm, &data->ssl, EAP_TYPE_FAST,
1315                                             data->fast_version,
1316                                             identifier, NULL, out_data);
1317         }
1318
1319         res = eap_peer_tls_decrypt(sm, &data->ssl, in_data, &in_decrypted);
1320         if (res)
1321                 return res;
1322
1323 continue_req:
1324         wpa_hexdump_buf(MSG_MSGDUMP, "EAP-FAST: Decrypted Phase 2 TLV(s)",
1325                         in_decrypted);
1326
1327         if (wpabuf_len(in_decrypted) < 4) {
1328                 wpa_printf(MSG_INFO, "EAP-FAST: Too short Phase 2 "
1329                            "TLV frame (len=%lu)",
1330                            (unsigned long) wpabuf_len(in_decrypted));
1331                 wpabuf_clear_free(in_decrypted);
1332                 return -1;
1333         }
1334
1335         res = eap_fast_process_decrypted(sm, data, ret, identifier,
1336                                          in_decrypted, out_data);
1337
1338         wpabuf_clear_free(in_decrypted);
1339
1340         return res;
1341 }
1342
1343
1344 static const u8 * eap_fast_get_a_id(const u8 *buf, size_t len, size_t *id_len)
1345 {
1346         const u8 *a_id;
1347         const struct pac_tlv_hdr *hdr;
1348
1349         /*
1350          * Parse authority identity (A-ID) from the EAP-FAST/Start. This
1351          * supports both raw A-ID and one inside an A-ID TLV.
1352          */
1353         a_id = buf;
1354         *id_len = len;
1355         if (len > sizeof(*hdr)) {
1356                 int tlen;
1357                 hdr = (const struct pac_tlv_hdr *) buf;
1358                 tlen = be_to_host16(hdr->len);
1359                 if (be_to_host16(hdr->type) == PAC_TYPE_A_ID &&
1360                     sizeof(*hdr) + tlen <= len) {
1361                         wpa_printf(MSG_DEBUG, "EAP-FAST: A-ID was in TLV "
1362                                    "(Start)");
1363                         a_id = (const u8 *) (hdr + 1);
1364                         *id_len = tlen;
1365                 }
1366         }
1367         wpa_hexdump_ascii(MSG_DEBUG, "EAP-FAST: A-ID", a_id, *id_len);
1368
1369         return a_id;
1370 }
1371
1372
1373 static void eap_fast_select_pac(struct eap_fast_data *data,
1374                                 const u8 *a_id, size_t a_id_len)
1375 {
1376         data->current_pac = eap_fast_get_pac(data->pac, a_id, a_id_len,
1377                                              PAC_TYPE_TUNNEL_PAC);
1378         if (data->current_pac == NULL) {
1379                 /*
1380                  * Tunnel PAC was not available for this A-ID. Try to use
1381                  * Machine Authentication PAC, if one is available.
1382                  */
1383                 data->current_pac = eap_fast_get_pac(
1384                         data->pac, a_id, a_id_len,
1385                         PAC_TYPE_MACHINE_AUTHENTICATION);
1386         }
1387
1388         if (data->current_pac) {
1389                 wpa_printf(MSG_DEBUG, "EAP-FAST: PAC found for this A-ID "
1390                            "(PAC-Type %d)", data->current_pac->pac_type);
1391                 wpa_hexdump_ascii(MSG_MSGDUMP, "EAP-FAST: A-ID-Info",
1392                                   data->current_pac->a_id_info,
1393                                   data->current_pac->a_id_info_len);
1394         }
1395 }
1396
1397
1398 static int eap_fast_use_pac_opaque(struct eap_sm *sm,
1399                                    struct eap_fast_data *data,
1400                                    struct eap_fast_pac *pac)
1401 {
1402         u8 *tlv;
1403         size_t tlv_len, olen;
1404         struct eap_tlv_hdr *ehdr;
1405
1406         olen = pac->pac_opaque_len;
1407         tlv_len = sizeof(*ehdr) + olen;
1408         tlv = os_malloc(tlv_len);
1409         if (tlv) {
1410                 ehdr = (struct eap_tlv_hdr *) tlv;
1411                 ehdr->tlv_type = host_to_be16(PAC_TYPE_PAC_OPAQUE);
1412                 ehdr->length = host_to_be16(olen);
1413                 os_memcpy(ehdr + 1, pac->pac_opaque, olen);
1414         }
1415         if (tlv == NULL ||
1416             tls_connection_client_hello_ext(sm->ssl_ctx, data->ssl.conn,
1417                                             TLS_EXT_PAC_OPAQUE,
1418                                             tlv, tlv_len) < 0) {
1419                 wpa_printf(MSG_DEBUG, "EAP-FAST: Failed to add PAC-Opaque TLS "
1420                            "extension");
1421                 os_free(tlv);
1422                 return -1;
1423         }
1424         os_free(tlv);
1425
1426         return 0;
1427 }
1428
1429
1430 static int eap_fast_clear_pac_opaque_ext(struct eap_sm *sm,
1431                                          struct eap_fast_data *data)
1432 {
1433         if (tls_connection_client_hello_ext(sm->ssl_ctx, data->ssl.conn,
1434                                             TLS_EXT_PAC_OPAQUE, NULL, 0) < 0) {
1435                 wpa_printf(MSG_DEBUG, "EAP-FAST: Failed to remove PAC-Opaque "
1436                            "TLS extension");
1437                 return -1;
1438         }
1439         return 0;
1440 }
1441
1442
1443 static int eap_fast_set_provisioning_ciphers(struct eap_sm *sm,
1444                                              struct eap_fast_data *data)
1445 {
1446         u8 ciphers[7];
1447         int count = 0;
1448
1449         if (data->provisioning_allowed & EAP_FAST_PROV_UNAUTH) {
1450                 wpa_printf(MSG_DEBUG, "EAP-FAST: Enabling unauthenticated "
1451                            "provisioning TLS cipher suites");
1452                 ciphers[count++] = TLS_CIPHER_ANON_DH_AES128_SHA;
1453         }
1454
1455         if (data->provisioning_allowed & EAP_FAST_PROV_AUTH) {
1456                 wpa_printf(MSG_DEBUG, "EAP-FAST: Enabling authenticated "
1457                            "provisioning TLS cipher suites");
1458                 ciphers[count++] = TLS_CIPHER_RSA_DHE_AES256_SHA;
1459                 ciphers[count++] = TLS_CIPHER_RSA_DHE_AES128_SHA;
1460                 ciphers[count++] = TLS_CIPHER_AES256_SHA;
1461                 ciphers[count++] = TLS_CIPHER_AES128_SHA;
1462                 ciphers[count++] = TLS_CIPHER_RC4_SHA;
1463         }
1464
1465         ciphers[count++] = TLS_CIPHER_NONE;
1466
1467         if (tls_connection_set_cipher_list(sm->ssl_ctx, data->ssl.conn,
1468                                            ciphers)) {
1469                 wpa_printf(MSG_INFO, "EAP-FAST: Could not configure TLS "
1470                            "cipher suites for provisioning");
1471                 return -1;
1472         }
1473
1474         return 0;
1475 }
1476
1477
1478 static int eap_fast_process_start(struct eap_sm *sm,
1479                                   struct eap_fast_data *data, u8 flags,
1480                                   const u8 *pos, size_t left)
1481 {
1482         const u8 *a_id;
1483         size_t a_id_len;
1484
1485         /* EAP-FAST Version negotiation (section 3.1) */
1486         wpa_printf(MSG_DEBUG, "EAP-FAST: Start (server ver=%d, own ver=%d)",
1487                    flags & EAP_TLS_VERSION_MASK, data->fast_version);
1488         if ((flags & EAP_TLS_VERSION_MASK) < data->fast_version)
1489                 data->fast_version = flags & EAP_TLS_VERSION_MASK;
1490         wpa_printf(MSG_DEBUG, "EAP-FAST: Using FAST version %d",
1491                    data->fast_version);
1492
1493         a_id = eap_fast_get_a_id(pos, left, &a_id_len);
1494         eap_fast_select_pac(data, a_id, a_id_len);
1495
1496         if (data->resuming && data->current_pac) {
1497                 wpa_printf(MSG_DEBUG, "EAP-FAST: Trying to resume session - "
1498                            "do not add PAC-Opaque to TLS ClientHello");
1499                 if (eap_fast_clear_pac_opaque_ext(sm, data) < 0)
1500                         return -1;
1501         } else if (data->current_pac) {
1502                 /*
1503                  * PAC found for the A-ID and we are not resuming an old
1504                  * session, so add PAC-Opaque extension to ClientHello.
1505                  */
1506                 if (eap_fast_use_pac_opaque(sm, data, data->current_pac) < 0)
1507                         return -1;
1508         } else {
1509                 /* No PAC found, so we must provision one. */
1510                 if (!data->provisioning_allowed) {
1511                         wpa_printf(MSG_DEBUG, "EAP-FAST: No PAC found and "
1512                                    "provisioning disabled");
1513                         return -1;
1514                 }
1515                 wpa_printf(MSG_DEBUG, "EAP-FAST: No PAC found - "
1516                            "starting provisioning");
1517                 if (eap_fast_set_provisioning_ciphers(sm, data) < 0 ||
1518                     eap_fast_clear_pac_opaque_ext(sm, data) < 0)
1519                         return -1;
1520                 data->provisioning = 1;
1521         }
1522
1523         return 0;
1524 }
1525
1526
1527 static struct wpabuf * eap_fast_process(struct eap_sm *sm, void *priv,
1528                                         struct eap_method_ret *ret,
1529                                         const struct wpabuf *reqData)
1530 {
1531         const struct eap_hdr *req;
1532         size_t left;
1533         int res;
1534         u8 flags, id;
1535         struct wpabuf *resp;
1536         const u8 *pos;
1537         struct eap_fast_data *data = priv;
1538         struct wpabuf msg;
1539
1540         pos = eap_peer_tls_process_init(sm, &data->ssl, EAP_TYPE_FAST, ret,
1541                                         reqData, &left, &flags);
1542         if (pos == NULL)
1543                 return NULL;
1544
1545         req = wpabuf_head(reqData);
1546         id = req->identifier;
1547
1548         if (flags & EAP_TLS_FLAGS_START) {
1549                 if (eap_fast_process_start(sm, data, flags, pos, left) < 0)
1550                         return NULL;
1551
1552                 left = 0; /* A-ID is not used in further packet processing */
1553         }
1554
1555         wpabuf_set(&msg, pos, left);
1556
1557         resp = NULL;
1558         if (tls_connection_established(sm->ssl_ctx, data->ssl.conn) &&
1559             !data->resuming) {
1560                 /* Process tunneled (encrypted) phase 2 data. */
1561                 res = eap_fast_decrypt(sm, data, ret, id, &msg, &resp);
1562                 if (res < 0) {
1563                         ret->methodState = METHOD_DONE;
1564                         ret->decision = DECISION_FAIL;
1565                         /*
1566                          * Ack possible Alert that may have caused failure in
1567                          * decryption.
1568                          */
1569                         res = 1;
1570                 }
1571         } else {
1572                 if (sm->waiting_ext_cert_check && data->pending_resp) {
1573                         struct eap_peer_config *config = eap_get_config(sm);
1574
1575                         if (config->pending_ext_cert_check ==
1576                             EXT_CERT_CHECK_GOOD) {
1577                                 wpa_printf(MSG_DEBUG,
1578                                            "EAP-FAST: External certificate check succeeded - continue handshake");
1579                                 resp = data->pending_resp;
1580                                 data->pending_resp = NULL;
1581                                 sm->waiting_ext_cert_check = 0;
1582                                 return resp;
1583                         }
1584
1585                         if (config->pending_ext_cert_check ==
1586                             EXT_CERT_CHECK_BAD) {
1587                                 wpa_printf(MSG_DEBUG,
1588                                            "EAP-FAST: External certificate check failed - force authentication failure");
1589                                 ret->methodState = METHOD_DONE;
1590                                 ret->decision = DECISION_FAIL;
1591                                 sm->waiting_ext_cert_check = 0;
1592                                 return NULL;
1593                         }
1594
1595                         wpa_printf(MSG_DEBUG,
1596                                    "EAP-FAST: Continuing to wait external server certificate validation");
1597                         return NULL;
1598                 }
1599
1600                 /* Continue processing TLS handshake (phase 1). */
1601                 res = eap_peer_tls_process_helper(sm, &data->ssl,
1602                                                   EAP_TYPE_FAST,
1603                                                   data->fast_version, id, &msg,
1604                                                   &resp);
1605                 if (res < 0) {
1606                         wpa_printf(MSG_DEBUG,
1607                                    "EAP-FAST: TLS processing failed");
1608                         ret->methodState = METHOD_DONE;
1609                         ret->decision = DECISION_FAIL;
1610                         return resp;
1611                 }
1612
1613                 if (sm->waiting_ext_cert_check) {
1614                         wpa_printf(MSG_DEBUG,
1615                                    "EAP-FAST: Waiting external server certificate validation");
1616                         wpabuf_clear_free(data->pending_resp);
1617                         data->pending_resp = resp;
1618                         return NULL;
1619                 }
1620
1621                 if (tls_connection_established(sm->ssl_ctx, data->ssl.conn)) {
1622                         char cipher[80];
1623                         wpa_printf(MSG_DEBUG,
1624                                    "EAP-FAST: TLS done, proceed to Phase 2");
1625                         if (data->provisioning &&
1626                             (!(data->provisioning_allowed &
1627                                EAP_FAST_PROV_AUTH) ||
1628                              tls_get_cipher(sm->ssl_ctx, data->ssl.conn,
1629                                             cipher, sizeof(cipher)) < 0 ||
1630                              os_strstr(cipher, "ADH-") ||
1631                              os_strstr(cipher, "anon"))) {
1632                                 wpa_printf(MSG_DEBUG, "EAP-FAST: Using "
1633                                            "anonymous (unauthenticated) "
1634                                            "provisioning");
1635                                 data->anon_provisioning = 1;
1636                         } else
1637                                 data->anon_provisioning = 0;
1638                         data->resuming = 0;
1639                         if (eap_fast_derive_keys(sm, data) < 0) {
1640                                 wpa_printf(MSG_DEBUG,
1641                                            "EAP-FAST: Could not derive keys");
1642                                 ret->methodState = METHOD_DONE;
1643                                 ret->decision = DECISION_FAIL;
1644                                 wpabuf_clear_free(resp);
1645                                 return NULL;
1646                         }
1647                 }
1648
1649                 if (res == 2) {
1650                         /*
1651                          * Application data included in the handshake message.
1652                          */
1653                         wpabuf_clear_free(data->pending_phase2_req);
1654                         data->pending_phase2_req = resp;
1655                         resp = NULL;
1656                         res = eap_fast_decrypt(sm, data, ret, id, &msg, &resp);
1657                 }
1658         }
1659
1660         if (res == 1) {
1661                 wpabuf_clear_free(resp);
1662                 return eap_peer_tls_build_ack(id, EAP_TYPE_FAST,
1663                                               data->fast_version);
1664         }
1665
1666         return resp;
1667 }
1668
1669
1670 #if 0 /* FIX */
1671 static Boolean eap_fast_has_reauth_data(struct eap_sm *sm, void *priv)
1672 {
1673         struct eap_fast_data *data = priv;
1674         return tls_connection_established(sm->ssl_ctx, data->ssl.conn);
1675 }
1676
1677
1678 static void eap_fast_deinit_for_reauth(struct eap_sm *sm, void *priv)
1679 {
1680         struct eap_fast_data *data = priv;
1681
1682         if (data->phase2_priv && data->phase2_method &&
1683             data->phase2_method->deinit_for_reauth)
1684                 data->phase2_method->deinit_for_reauth(sm, data->phase2_priv);
1685         os_free(data->key_block_p);
1686         data->key_block_p = NULL;
1687         wpabuf_clear_free(data->pending_phase2_req);
1688         data->pending_phase2_req = NULL;
1689         wpabuf_clear_free(data->pending_resp);
1690         data->pending_resp = NULL;
1691 }
1692
1693
1694 static void * eap_fast_init_for_reauth(struct eap_sm *sm, void *priv)
1695 {
1696         struct eap_fast_data *data = priv;
1697         if (eap_peer_tls_reauth_init(sm, &data->ssl)) {
1698                 os_free(data);
1699                 return NULL;
1700         }
1701         os_memset(data->key_data, 0, EAP_FAST_KEY_LEN);
1702         os_memset(data->emsk, 0, EAP_EMSK_LEN);
1703         os_free(data->session_id);
1704         data->session_id = NULL;
1705         if (data->phase2_priv && data->phase2_method &&
1706             data->phase2_method->init_for_reauth)
1707                 data->phase2_method->init_for_reauth(sm, data->phase2_priv);
1708         data->phase2_success = 0;
1709         data->resuming = 1;
1710         data->provisioning = 0;
1711         data->anon_provisioning = 0;
1712         data->simck_idx = 0;
1713         return priv;
1714 }
1715 #endif
1716
1717
1718 static int eap_fast_get_status(struct eap_sm *sm, void *priv, char *buf,
1719                                size_t buflen, int verbose)
1720 {
1721         struct eap_fast_data *data = priv;
1722         int len, ret;
1723
1724         len = eap_peer_tls_status(sm, &data->ssl, buf, buflen, verbose);
1725         if (data->phase2_method) {
1726                 ret = os_snprintf(buf + len, buflen - len,
1727                                   "EAP-FAST Phase2 method=%s\n",
1728                                   data->phase2_method->name);
1729                 if (os_snprintf_error(buflen - len, ret))
1730                         return len;
1731                 len += ret;
1732         }
1733         return len;
1734 }
1735
1736
1737 static Boolean eap_fast_isKeyAvailable(struct eap_sm *sm, void *priv)
1738 {
1739         struct eap_fast_data *data = priv;
1740         return data->success;
1741 }
1742
1743
1744 static u8 * eap_fast_getKey(struct eap_sm *sm, void *priv, size_t *len)
1745 {
1746         struct eap_fast_data *data = priv;
1747         u8 *key;
1748
1749         if (!data->success)
1750                 return NULL;
1751
1752         key = os_memdup(data->key_data, EAP_FAST_KEY_LEN);
1753         if (key == NULL)
1754                 return NULL;
1755
1756         *len = EAP_FAST_KEY_LEN;
1757
1758         return key;
1759 }
1760
1761
1762 static u8 * eap_fast_get_session_id(struct eap_sm *sm, void *priv, size_t *len)
1763 {
1764         struct eap_fast_data *data = priv;
1765         u8 *id;
1766
1767         if (!data->success || !data->session_id)
1768                 return NULL;
1769
1770         id = os_memdup(data->session_id, data->id_len);
1771         if (id == NULL)
1772                 return NULL;
1773
1774         *len = data->id_len;
1775
1776         return id;
1777 }
1778
1779
1780 static u8 * eap_fast_get_emsk(struct eap_sm *sm, void *priv, size_t *len)
1781 {
1782         struct eap_fast_data *data = priv;
1783         u8 *key;
1784
1785         if (!data->success)
1786                 return NULL;
1787
1788         key = os_memdup(data->emsk, EAP_EMSK_LEN);
1789         if (key == NULL)
1790                 return NULL;
1791
1792         *len = EAP_EMSK_LEN;
1793
1794         return key;
1795 }
1796
1797
1798 int eap_peer_fast_register(void)
1799 {
1800         struct eap_method *eap;
1801
1802         eap = eap_peer_method_alloc(EAP_PEER_METHOD_INTERFACE_VERSION,
1803                                     EAP_VENDOR_IETF, EAP_TYPE_FAST, "FAST");
1804         if (eap == NULL)
1805                 return -1;
1806
1807         eap->init = eap_fast_init;
1808         eap->deinit = eap_fast_deinit;
1809         eap->process = eap_fast_process;
1810         eap->isKeyAvailable = eap_fast_isKeyAvailable;
1811         eap->getKey = eap_fast_getKey;
1812         eap->getSessionId = eap_fast_get_session_id;
1813         eap->get_status = eap_fast_get_status;
1814 #if 0
1815         eap->has_reauth_data = eap_fast_has_reauth_data;
1816         eap->deinit_for_reauth = eap_fast_deinit_for_reauth;
1817         eap->init_for_reauth = eap_fast_init_for_reauth;
1818 #endif
1819         eap->get_emsk = eap_fast_get_emsk;
1820
1821         return eap_peer_method_register(eap);
1822 }