contrib/wpa_supplicant-0.5.8/eap_ttls.c

   1 /*
   2  * EAP peer method: EAP-TTLS (draft-ietf-pppext-eap-ttls-03.txt)
   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 "eap_tls_common.h"
  20 #include "config_ssid.h"
  21 #include "ms_funcs.h"
  22 #include "sha1.h"
  23 #include "crypto.h"
  24 #include "tls.h"
  25 #include "eap_ttls.h"
  26
  27
  28 /* Maximum supported PEAP version
  29  * 0 = draft-ietf-pppext-eap-ttls-03.txt / draft-funk-eap-ttls-v0-00.txt
  30  * 1 = draft-funk-eap-ttls-v1-00.txt
  31  */
  32 #define EAP_TTLS_VERSION 0 /* TTLSv1 implementation is not yet complete */
  33
  34
  35 #define MSCHAPV2_KEY_LEN 16
  36
  37
  38 static void eap_ttls_deinit(struct eap_sm *sm, void *priv);
  39
  40
  41 struct eap_ttls_data {
  42         struct eap_ssl_data ssl;
  43         int ssl_initialized;
  44
  45         int ttls_version, force_ttls_version;
  46
  47         const struct eap_method *phase2_method;
  48         void *phase2_priv;
  49         int phase2_success;
  50         int phase2_start;
  51
  52         enum {
  53                 EAP_TTLS_PHASE2_EAP,
  54                 EAP_TTLS_PHASE2_MSCHAPV2,
  55                 EAP_TTLS_PHASE2_MSCHAP,
  56                 EAP_TTLS_PHASE2_PAP,
  57                 EAP_TTLS_PHASE2_CHAP
  58         } phase2_type;
  59         struct eap_method_type phase2_eap_type;
  60         struct eap_method_type *phase2_eap_types;
  61         size_t num_phase2_eap_types;
  62
  63         u8 auth_response[20];
  64         int auth_response_valid;
  65         u8 ident;
  66         int resuming; /* starting a resumed session */
  67         int reauth; /* reauthentication */
  68         u8 *key_data;
  69
  70         u8 *pending_phase2_req;
  71         size_t pending_phase2_req_len;
  72 };
  73
  74
  75 static void * eap_ttls_init(struct eap_sm *sm)
  76 {
  77         struct eap_ttls_data *data;
  78         struct wpa_ssid *config = eap_get_config(sm);
  79         char *selected;
  80
  81         data = os_zalloc(sizeof(*data));
  82         if (data == NULL)
  83                 return NULL;
  84         data->ttls_version = EAP_TTLS_VERSION;
  85         data->force_ttls_version = -1;
  86         selected = "EAP";
  87         data->phase2_type = EAP_TTLS_PHASE2_EAP;
  88
  89         if (config && config->phase1) {
  90                 char *pos = os_strstr(config->phase1, "ttlsver=");
  91                 if (pos) {
  92                         data->force_ttls_version = atoi(pos + 8);
  93                         data->ttls_version = data->force_ttls_version;
  94                         wpa_printf(MSG_DEBUG, "EAP-TTLS: Forced TTLS version "
  95                                    "%d", data->force_ttls_version);
  96                 }
  97         }
  98
  99         if (config && config->phase2) {
 100                 if (os_strstr(config->phase2, "autheap=")) {
 101                         selected = "EAP";
 102                         data->phase2_type = EAP_TTLS_PHASE2_EAP;
 103                 } else if (os_strstr(config->phase2, "auth=MSCHAPV2")) {
 104                         selected = "MSCHAPV2";
 105                         data->phase2_type = EAP_TTLS_PHASE2_MSCHAPV2;
 106                 } else if (os_strstr(config->phase2, "auth=MSCHAP")) {
 107                         selected = "MSCHAP";
 108                         data->phase2_type = EAP_TTLS_PHASE2_MSCHAP;
 109                 } else if (os_strstr(config->phase2, "auth=PAP")) {
 110                         selected = "PAP";
 111                         data->phase2_type = EAP_TTLS_PHASE2_PAP;
 112                 } else if (os_strstr(config->phase2, "auth=CHAP")) {
 113                         selected = "CHAP";
 114                         data->phase2_type = EAP_TTLS_PHASE2_CHAP;
 115                 }
 116         }
 117         wpa_printf(MSG_DEBUG, "EAP-TTLS: Phase2 type: %s", selected);
 118
 119         if (data->phase2_type == EAP_TTLS_PHASE2_EAP) {
 120                 if (config && config->phase2) {
 121                         char *start, *pos, *buf;
 122                         struct eap_method_type *methods = NULL, *_methods;
 123                         u8 method;
 124                         size_t num_methods = 0;
 125                         start = buf = os_strdup(config->phase2);
 126                         if (buf == NULL) {
 127                                 eap_ttls_deinit(sm, data);
 128                                 return NULL;
 129                         }
 130                         while (start && *start != '\0') {
 131                                 int vendor;
 132                                 pos = os_strstr(start, "autheap=");
 133                                 if (pos == NULL)
 134                                         break;
 135                                 if (start != pos && *(pos - 1) != ' ') {
 136                                         start = pos + 8;
 137                                         continue;
 138                                 }
 139
 140                                 start = pos + 8;
 141                                 pos = os_strchr(start, ' ');
 142                                 if (pos)
 143                                         *pos++ = '\0';
 144                                 method = eap_get_phase2_type(start, &vendor);
 145                                 if (vendor == EAP_VENDOR_IETF &&
 146                                     method == EAP_TYPE_NONE) {
 147                                         wpa_printf(MSG_ERROR, "EAP-TTLS: "
 148                                                    "Unsupported Phase2 EAP "
 149                                                    "method '%s'", start);
 150                                 } else {
 151                                         num_methods++;
 152                                         _methods = os_realloc(
 153                                                 methods, num_methods *
 154                                                 sizeof(*methods));
 155                                         if (_methods == NULL) {
 156                                                 os_free(methods);
 157                                                 os_free(buf);
 158                                                 eap_ttls_deinit(sm, data);
 159                                                 return NULL;
 160                                         }
 161                                         methods = _methods;
 162                                         methods[num_methods - 1].vendor =
 163                                                 vendor;
 164                                         methods[num_methods - 1].method =
 165                                                 method;
 166                                 }
 167
 168                                 start = pos;
 169                         }
 170                         os_free(buf);
 171                         data->phase2_eap_types = methods;
 172                         data->num_phase2_eap_types = num_methods;
 173                 }
 174                 if (data->phase2_eap_types == NULL) {
 175                         data->phase2_eap_types = eap_get_phase2_types(
 176                                 config, &data->num_phase2_eap_types);
 177                 }
 178                 if (data->phase2_eap_types == NULL) {
 179                         wpa_printf(MSG_ERROR, "EAP-TTLS: No Phase2 EAP method "
 180                                    "available");
 181                         eap_ttls_deinit(sm, data);
 182                         return NULL;
 183                 }
 184                 wpa_hexdump(MSG_DEBUG, "EAP-TTLS: Phase2 EAP types",
 185                             (u8 *) data->phase2_eap_types,
 186                             data->num_phase2_eap_types *
 187                             sizeof(struct eap_method_type));
 188                 data->phase2_eap_type.vendor = EAP_VENDOR_IETF;
 189                 data->phase2_eap_type.method = EAP_TYPE_NONE;
 190         }
 191
 192         if (!(tls_capabilities(sm->ssl_ctx) & TLS_CAPABILITY_IA) &&
 193             data->ttls_version > 0) {
 194                 if (data->force_ttls_version > 0) {
 195                         wpa_printf(MSG_INFO, "EAP-TTLS: Forced TTLSv%d and "
 196                                    "TLS library does not support TLS/IA.",
 197                                    data->force_ttls_version);
 198                         eap_ttls_deinit(sm, data);
 199                         return NULL;
 200                 }
 201                 data->ttls_version = 0;
 202         }
 203
 204         return data;
 205 }
 206
 207
 208 static void eap_ttls_deinit(struct eap_sm *sm, void *priv)
 209 {
 210         struct eap_ttls_data *data = priv;
 211         if (data == NULL)
 212                 return;
 213         if (data->phase2_priv && data->phase2_method)
 214                 data->phase2_method->deinit(sm, data->phase2_priv);
 215         os_free(data->phase2_eap_types);
 216         if (data->ssl_initialized)
 217                 eap_tls_ssl_deinit(sm, &data->ssl);
 218         os_free(data->key_data);
 219         os_free(data->pending_phase2_req);
 220         os_free(data);
 221 }
 222
 223
 224 static int eap_ttls_encrypt(struct eap_sm *sm, struct eap_ttls_data *data,
 225                             int id, const u8 *plain, size_t plain_len,
 226                             u8 **out_data, size_t *out_len)
 227 {
 228         int res;
 229         u8 *pos;
 230         struct eap_hdr *resp;
 231
 232         /* TODO: add support for fragmentation, if needed. This will need to
 233          * add TLS Message Length field, if the frame is fragmented. */
 234         resp = os_malloc(sizeof(struct eap_hdr) + 2 + data->ssl.tls_out_limit);
 235         if (resp == NULL)
 236                 return -1;
 237
 238         resp->code = EAP_CODE_RESPONSE;
 239         resp->identifier = id;
 240
 241         pos = (u8 *) (resp + 1);
 242         *pos++ = EAP_TYPE_TTLS;
 243         *pos++ = data->ttls_version;
 244
 245         res = tls_connection_encrypt(sm->ssl_ctx, data->ssl.conn,
 246                                      plain, plain_len,
 247                                      pos, data->ssl.tls_out_limit);
 248         if (res < 0) {
 249                 wpa_printf(MSG_INFO, "EAP-TTLS: Failed to encrypt Phase 2 "
 250                            "data");
 251                 os_free(resp);
 252                 return -1;
 253         }
 254
 255         *out_len = sizeof(struct eap_hdr) + 2 + res;
 256         resp->length = host_to_be16(*out_len);
 257         *out_data = (u8 *) resp;
 258         return 0;
 259 }
 260
 261
 262 static u8 * eap_ttls_avp_hdr(u8 *avphdr, u32 avp_code, u32 vendor_id,
 263                              int mandatory, size_t len)
 264 {
 265         struct ttls_avp_vendor *avp;
 266         u8 flags;
 267         size_t hdrlen;
 268
 269         avp = (struct ttls_avp_vendor *) avphdr;
 270         flags = mandatory ? AVP_FLAGS_MANDATORY : 0;
 271         if (vendor_id) {
 272                 flags |= AVP_FLAGS_VENDOR;
 273                 hdrlen = sizeof(*avp);
 274                 avp->vendor_id = host_to_be32(vendor_id);
 275         } else {
 276                 hdrlen = sizeof(struct ttls_avp);
 277         }
 278
 279         avp->avp_code = host_to_be32(avp_code);
 280         avp->avp_length = host_to_be32((flags << 24) | (hdrlen + len));
 281
 282         return avphdr + hdrlen;
 283 }
 284
 285
 286 static u8 * eap_ttls_avp_add(u8 *start, u8 *avphdr, u32 avp_code,
 287                              u32 vendor_id, int mandatory,
 288                              u8 *data, size_t len)
 289 {
 290         u8 *pos;
 291         pos = eap_ttls_avp_hdr(avphdr, avp_code, vendor_id, mandatory, len);
 292         os_memcpy(pos, data, len);
 293         pos += len;
 294         AVP_PAD(start, pos);
 295         return pos;
 296 }
 297
 298
 299 static int eap_ttls_avp_encapsulate(u8 **resp, size_t *resp_len, u32 avp_code,
 300                                     int mandatory)
 301 {
 302         u8 *avp, *pos;
 303
 304         avp = os_malloc(sizeof(struct ttls_avp) + *resp_len + 4);
 305         if (avp == NULL) {
 306                 os_free(*resp);
 307                 *resp = NULL;
 308                 *resp_len = 0;
 309                 return -1;
 310         }
 311
 312         pos = eap_ttls_avp_hdr(avp, avp_code, 0, mandatory, *resp_len);
 313         os_memcpy(pos, *resp, *resp_len);
 314         pos += *resp_len;
 315         AVP_PAD(avp, pos);
 316         os_free(*resp);
 317         *resp = avp;
 318         *resp_len = pos - avp;
 319         return 0;
 320 }
 321
 322
 323 static int eap_ttls_ia_permute_inner_secret(struct eap_sm *sm,
 324                                             struct eap_ttls_data *data,
 325                                             const u8 *key, size_t key_len)
 326 {
 327         u8 *buf;
 328         size_t buf_len;
 329         int ret;
 330
 331         if (key) {
 332                 buf_len = 2 + key_len;
 333                 buf = os_malloc(buf_len);
 334                 if (buf == NULL)
 335                         return -1;
 336                 WPA_PUT_BE16(buf, key_len);
 337                 os_memcpy(buf + 2, key, key_len);
 338         } else {
 339                 buf = NULL;
 340                 buf_len = 0;
 341         }
 342
 343         wpa_hexdump_key(MSG_DEBUG, "EAP-TTLS: Session keys for TLS/IA inner "
 344                         "secret permutation", buf, buf_len);
 345         ret = tls_connection_ia_permute_inner_secret(sm->ssl_ctx,
 346                                                      data->ssl.conn,
 347                                                      buf, buf_len);
 348         os_free(buf);
 349
 350         return ret;
 351 }
 352
 353
 354 static int eap_ttls_v0_derive_key(struct eap_sm *sm,
 355                                   struct eap_ttls_data *data)
 356 {
 357         os_free(data->key_data);
 358         data->key_data = eap_tls_derive_key(sm, &data->ssl,
 359                                             "ttls keying material",
 360                                             EAP_TLS_KEY_LEN);
 361         if (!data->key_data) {
 362                 wpa_printf(MSG_INFO, "EAP-TTLS: Failed to derive key");
 363                 return -1;
 364         }
 365
 366         wpa_hexdump_key(MSG_DEBUG, "EAP-TTLS: Derived key",
 367                         data->key_data, EAP_TLS_KEY_LEN);
 368
 369         return 0;
 370 }
 371
 372
 373 static int eap_ttls_v1_derive_key(struct eap_sm *sm,
 374                                   struct eap_ttls_data *data)
 375 {
 376         struct tls_keys keys;
 377         u8 *rnd;
 378
 379         os_free(data->key_data);
 380         data->key_data = NULL;
 381
 382         os_memset(&keys, 0, sizeof(keys));
 383         if (tls_connection_get_keys(sm->ssl_ctx, data->ssl.conn, &keys) ||
 384             keys.client_random == NULL || keys.server_random == NULL ||
 385             keys.inner_secret == NULL) {
 386                 wpa_printf(MSG_INFO, "EAP-TTLS: Could not get inner secret, "
 387                            "client random, or server random to derive keying "
 388                            "material");
 389                 return -1;
 390         }
 391
 392         rnd = os_malloc(keys.client_random_len + keys.server_random_len);
 393         data->key_data = os_malloc(EAP_TLS_KEY_LEN);
 394         if (rnd == NULL || data->key_data == NULL) {
 395                 wpa_printf(MSG_INFO, "EAP-TTLS: No memory for key derivation");
 396                 os_free(rnd);
 397                 os_free(data->key_data);
 398                 data->key_data = NULL;
 399                 return -1;
 400         }
 401         os_memcpy(rnd, keys.client_random, keys.client_random_len);
 402         os_memcpy(rnd + keys.client_random_len, keys.server_random,
 403                   keys.server_random_len);
 404
 405         if (tls_prf(keys.inner_secret, keys.inner_secret_len,
 406                     "ttls v1 keying material", rnd, keys.client_random_len +
 407                     keys.server_random_len, data->key_data, EAP_TLS_KEY_LEN)) {
 408                 wpa_printf(MSG_DEBUG, "EAP-TTLS: Failed to derive key");
 409                 os_free(rnd);
 410                 os_free(data->key_data);
 411                 data->key_data = NULL;
 412                 return -1;
 413         }
 414
 415         wpa_hexdump(MSG_DEBUG, "EAP-TTLS: client/server random",
 416                     rnd, keys.client_random_len + keys.server_random_len);
 417         wpa_hexdump_key(MSG_DEBUG, "EAP-TTLS: TLS/IA inner secret",
 418                         keys.inner_secret, keys.inner_secret_len);
 419
 420         os_free(rnd);
 421
 422         wpa_hexdump_key(MSG_DEBUG, "EAP-TTLS: Derived key",
 423                         data->key_data, EAP_TLS_KEY_LEN);
 424
 425         return 0;
 426 }
 427
 428
 429 static u8 * eap_ttls_implicit_challenge(struct eap_sm *sm,
 430                                         struct eap_ttls_data *data, size_t len)
 431 {
 432         struct tls_keys keys;
 433         u8 *challenge, *rnd;
 434
 435         if (data->ttls_version == 0) {
 436                 return eap_tls_derive_key(sm, &data->ssl, "ttls challenge",
 437                                           len);
 438         }
 439
 440         os_memset(&keys, 0, sizeof(keys));
 441         if (tls_connection_get_keys(sm->ssl_ctx, data->ssl.conn, &keys) ||
 442             keys.client_random == NULL || keys.server_random == NULL ||
 443             keys.inner_secret == NULL) {
 444                 wpa_printf(MSG_INFO, "EAP-TTLS: Could not get inner secret, "
 445                            "client random, or server random to derive "
 446                            "implicit challenge");
 447                 return NULL;
 448         }
 449
 450         rnd = os_malloc(keys.client_random_len + keys.server_random_len);
 451         challenge = os_malloc(len);
 452         if (rnd == NULL || challenge == NULL) {
 453                 wpa_printf(MSG_INFO, "EAP-TTLS: No memory for implicit "
 454                            "challenge derivation");
 455                 os_free(rnd);
 456                 os_free(challenge);
 457                 return NULL;
 458         }
 459         os_memcpy(rnd, keys.server_random, keys.server_random_len);
 460         os_memcpy(rnd + keys.server_random_len, keys.client_random,
 461                   keys.client_random_len);
 462
 463         if (tls_prf(keys.inner_secret, keys.inner_secret_len,
 464                     "inner application challenge", rnd,
 465                     keys.client_random_len + keys.server_random_len,
 466                     challenge, len)) {
 467                 wpa_printf(MSG_DEBUG, "EAP-TTLS: Failed to derive implicit "
 468                            "challenge");
 469                 os_free(rnd);
 470                 os_free(challenge);
 471                 return NULL;
 472         }
 473
 474         os_free(rnd);
 475
 476         wpa_hexdump_key(MSG_DEBUG, "EAP-TTLS: Derived implicit challenge",
 477                         challenge, len);
 478
 479         return challenge;
 480 }
 481
 482
 483 static int eap_ttls_phase2_nak(struct eap_ttls_data *data, struct eap_hdr *hdr,
 484                                u8 **resp, size_t *resp_len)
 485 {
 486         struct eap_hdr *resp_hdr;
 487         u8 *pos = (u8 *) (hdr + 1);
 488         size_t i;
 489
 490         /* TODO: add support for expanded Nak */
 491         wpa_printf(MSG_DEBUG, "EAP-TTLS: Phase 2 Request: Nak type=%d", *pos);
 492         wpa_hexdump(MSG_DEBUG, "EAP-TTLS: Allowed Phase2 EAP types",
 493                     (u8 *) data->phase2_eap_types, data->num_phase2_eap_types *
 494                     sizeof(struct eap_method_type));
 495         *resp_len = sizeof(struct eap_hdr) + 1;
 496         *resp = os_malloc(*resp_len + data->num_phase2_eap_types);
 497         if (*resp == NULL)
 498                 return -1;
 499
 500         resp_hdr = (struct eap_hdr *) (*resp);
 501         resp_hdr->code = EAP_CODE_RESPONSE;
 502         resp_hdr->identifier = hdr->identifier;
 503         pos = (u8 *) (resp_hdr + 1);
 504         *pos++ = EAP_TYPE_NAK;
 505         for (i = 0; i < data->num_phase2_eap_types; i++) {
 506                 if (data->phase2_eap_types[i].vendor == EAP_VENDOR_IETF &&
 507                     data->phase2_eap_types[i].method < 256) {
 508                         (*resp_len)++;
 509                         *pos++ = data->phase2_eap_types[i].method;
 510                 }
 511         }
 512         resp_hdr->length = host_to_be16(*resp_len);
 513
 514         return 0;
 515 }
 516
 517
 518 static int eap_ttls_phase2_request_eap(struct eap_sm *sm,
 519                                        struct eap_ttls_data *data,
 520                                        struct eap_method_ret *ret,
 521                                        struct eap_hdr *hdr,
 522                                        u8 **resp, size_t *resp_len)
 523 {
 524         size_t len = be_to_host16(hdr->length);
 525         u8 *pos;
 526         struct eap_method_ret iret;
 527         struct wpa_ssid *config = eap_get_config(sm);
 528
 529         if (len <= sizeof(struct eap_hdr)) {
 530                 wpa_printf(MSG_INFO, "EAP-TTLS: too short "
 531                            "Phase 2 request (len=%lu)", (unsigned long) len);
 532                 return -1;
 533         }
 534         pos = (u8 *) (hdr + 1);
 535         wpa_printf(MSG_DEBUG, "EAP-TTLS: Phase 2 EAP Request: type=%d", *pos);
 536         switch (*pos) {
 537         case EAP_TYPE_IDENTITY:
 538                 *resp = eap_sm_buildIdentity(sm, hdr->identifier, resp_len, 1);
 539                 break;
 540         default:
 541                 if (data->phase2_eap_type.vendor == EAP_VENDOR_IETF &&
 542                     data->phase2_eap_type.method == EAP_TYPE_NONE) {
 543                         size_t i;
 544                         for (i = 0; i < data->num_phase2_eap_types; i++) {
 545                                 if (data->phase2_eap_types[i].vendor !=
 546                                     EAP_VENDOR_IETF ||
 547                                     data->phase2_eap_types[i].method != *pos)
 548                                         continue;
 549
 550                                 data->phase2_eap_type.vendor =
 551                                         data->phase2_eap_types[i].vendor;
 552                                 data->phase2_eap_type.method =
 553                                         data->phase2_eap_types[i].method;
 554                                 wpa_printf(MSG_DEBUG, "EAP-TTLS: Selected "
 555                                            "Phase 2 EAP vendor %d method %d",
 556                                            data->phase2_eap_type.vendor,
 557                                            data->phase2_eap_type.method);
 558                                 break;
 559                         }
 560                 }
 561                 if (*pos != data->phase2_eap_type.method ||
 562                     *pos == EAP_TYPE_NONE) {
 563                         if (eap_ttls_phase2_nak(data, hdr, resp, resp_len))
 564                                 return -1;
 565                         break;
 566                 }
 567
 568                 if (data->phase2_priv == NULL) {
 569                         data->phase2_method = eap_sm_get_eap_methods(
 570                                 EAP_VENDOR_IETF, *pos);
 571                         if (data->phase2_method) {
 572                                 sm->init_phase2 = 1;
 573                                 sm->mschapv2_full_key = 1;
 574                                 data->phase2_priv =
 575                                         data->phase2_method->init(sm);
 576                                 sm->init_phase2 = 0;
 577                                 sm->mschapv2_full_key = 0;
 578                         }
 579                 }
 580                 if (data->phase2_priv == NULL || data->phase2_method == NULL) {
 581                         wpa_printf(MSG_INFO, "EAP-TTLS: failed to initialize "
 582                                    "Phase 2 EAP method %d", *pos);
 583                         return -1;
 584                 }
 585                 os_memset(&iret, 0, sizeof(iret));
 586                 *resp = data->phase2_method->process(sm, data->phase2_priv,
 587                                                      &iret, (u8 *) hdr, len,
 588                                                      resp_len);
 589                 if ((iret.methodState == METHOD_DONE ||
 590                      iret.methodState == METHOD_MAY_CONT) &&
 591                     (iret.decision == DECISION_UNCOND_SUCC ||
 592                      iret.decision == DECISION_COND_SUCC ||
 593                      iret.decision == DECISION_FAIL)) {
 594                         ret->methodState = iret.methodState;
 595                         ret->decision = iret.decision;
 596                 }
 597                 if (data->ttls_version > 0) {
 598                         const struct eap_method *m = data->phase2_method;
 599                         void *priv = data->phase2_priv;
 600
 601                         /* TTLSv1 requires TLS/IA FinalPhaseFinished */
 602                         if (ret->decision == DECISION_UNCOND_SUCC)
 603                                 ret->decision = DECISION_COND_SUCC;
 604                         ret->methodState = METHOD_CONT;
 605
 606                         if (ret->decision == DECISION_COND_SUCC &&
 607                             m->isKeyAvailable && m->getKey &&
 608                             m->isKeyAvailable(sm, priv)) {
 609                                 u8 *key;
 610                                 size_t key_len;
 611                                 key = m->getKey(sm, priv, &key_len);
 612                                 if (key) {
 613                                         eap_ttls_ia_permute_inner_secret(
 614                                                 sm, data, key, key_len);
 615                                         os_free(key);
 616                                 }
 617                         }
 618                 }
 619                 break;
 620         }
 621
 622         if (*resp == NULL &&
 623             (config->pending_req_identity || config->pending_req_password ||
 624              config->pending_req_otp)) {
 625                 return 0;
 626         }
 627
 628         if (*resp == NULL)
 629                 return -1;
 630
 631         wpa_hexdump(MSG_DEBUG, "EAP-TTLS: AVP encapsulate EAP Response",
 632                     *resp, *resp_len);
 633         return eap_ttls_avp_encapsulate(resp, resp_len,
 634                                         RADIUS_ATTR_EAP_MESSAGE, 1);
 635 }
 636
 637
 638 static int eap_ttls_phase2_request_mschapv2(struct eap_sm *sm,
 639                                             struct eap_ttls_data *data,
 640                                             struct eap_method_ret *ret,
 641                                             u8 **resp, size_t *resp_len)
 642 {
 643         struct wpa_ssid *config = eap_get_config(sm);
 644         u8 *buf, *pos, *challenge, *username, *peer_challenge;
 645         size_t username_len, i;
 646
 647         wpa_printf(MSG_DEBUG, "EAP-TTLS: Phase 2 MSCHAPV2 Request");
 648
 649         /* MSCHAPv2 does not include optional domain name in the
 650          * challenge-response calculation, so remove domain prefix
 651          * (if present). */
 652         username = config->identity;
 653         username_len = config->identity_len;
 654         pos = username;
 655         for (i = 0; i < username_len; i++) {
 656                 if (username[i] == '\\') {
 657                         username_len -= i + 1;
 658                         username += i + 1;
 659                         break;
 660                 }
 661         }
 662
 663         pos = buf = os_malloc(config->identity_len + 1000);
 664         if (buf == NULL) {
 665                 wpa_printf(MSG_ERROR,
 666                            "EAP-TTLS/MSCHAPV2: Failed to allocate memory");
 667                 return -1;
 668         }
 669
 670         /* User-Name */
 671         pos = eap_ttls_avp_add(buf, pos, RADIUS_ATTR_USER_NAME, 0, 1,
 672                                config->identity, config->identity_len);
 673
 674         /* MS-CHAP-Challenge */
 675         challenge = eap_ttls_implicit_challenge(
 676                 sm, data, EAP_TTLS_MSCHAPV2_CHALLENGE_LEN * 2 + 1);
 677         if (challenge == NULL) {
 678                 os_free(buf);
 679                 wpa_printf(MSG_ERROR, "EAP-TTLS/MSCHAPV2: Failed to derive "
 680                            "implicit challenge");
 681                 return -1;
 682         }
 683         peer_challenge = challenge + 1 + EAP_TTLS_MSCHAPV2_CHALLENGE_LEN;
 684
 685         pos = eap_ttls_avp_add(buf, pos, RADIUS_ATTR_MS_CHAP_CHALLENGE,
 686                                RADIUS_VENDOR_ID_MICROSOFT, 1,
 687                                challenge, EAP_TTLS_MSCHAPV2_CHALLENGE_LEN);
 688
 689         /* MS-CHAP2-Response */
 690         pos = eap_ttls_avp_hdr(pos, RADIUS_ATTR_MS_CHAP2_RESPONSE,
 691                                RADIUS_VENDOR_ID_MICROSOFT, 1,
 692                                EAP_TTLS_MSCHAPV2_RESPONSE_LEN);
 693         data->ident = challenge[EAP_TTLS_MSCHAPV2_CHALLENGE_LEN];
 694         *pos++ = data->ident;
 695         *pos++ = 0; /* Flags */
 696         os_memcpy(pos, peer_challenge, EAP_TTLS_MSCHAPV2_CHALLENGE_LEN);
 697         pos += EAP_TTLS_MSCHAPV2_CHALLENGE_LEN;
 698         os_memset(pos, 0, 8); /* Reserved, must be zero */
 699         pos += 8;
 700         wpa_hexdump(MSG_DEBUG, "EAP-TTLS: MSCHAPV2: implicit auth_challenge",
 701                     challenge, EAP_TTLS_MSCHAPV2_CHALLENGE_LEN);
 702         wpa_hexdump(MSG_DEBUG, "EAP-TTLS: MSCHAPV2: peer_challenge",
 703                     peer_challenge, EAP_TTLS_MSCHAPV2_CHALLENGE_LEN);
 704         wpa_hexdump_ascii(MSG_DEBUG, "EAP-TTLS: MSCHAPV2 username",
 705                           username, username_len);
 706         wpa_hexdump_ascii_key(MSG_DEBUG, "EAP-TTLS: MSCHAPV2 password",
 707                               config->password, config->password_len);
 708         generate_nt_response(challenge, peer_challenge,
 709                              username, username_len,
 710                              config->password, config->password_len,
 711                              pos);
 712         wpa_hexdump(MSG_DEBUG, "EAP-TTLS: MSCHAPV2 response", pos, 24);
 713         generate_authenticator_response(config->password, config->password_len,
 714                                         peer_challenge, challenge,
 715                                         username, username_len,
 716                                         pos, data->auth_response);
 717         data->auth_response_valid = 1;
 718
 719         if (data->ttls_version > 0) {
 720                 u8 pw_hash[16], pw_hash_hash[16], master_key[16];
 721                 u8 session_key[2 * MSCHAPV2_KEY_LEN];
 722                 nt_password_hash(config->password, config->password_len,
 723                                  pw_hash);
 724                 hash_nt_password_hash(pw_hash, pw_hash_hash);
 725                 get_master_key(pw_hash_hash, pos /* nt_response */,
 726                                master_key);
 727                 get_asymetric_start_key(master_key, session_key,
 728                                         MSCHAPV2_KEY_LEN, 0, 0);
 729                 get_asymetric_start_key(master_key,
 730                                         session_key + MSCHAPV2_KEY_LEN,
 731                                         MSCHAPV2_KEY_LEN, 1, 0);
 732                 eap_ttls_ia_permute_inner_secret(sm, data,
 733                                                  session_key,
 734                                                  sizeof(session_key));
 735         }
 736
 737         pos += 24;
 738         os_free(challenge);
 739         AVP_PAD(buf, pos);
 740
 741         *resp = buf;
 742         *resp_len = pos - buf;
 743
 744         if (sm->workaround && data->ttls_version == 0) {
 745                 /* At least FreeRADIUS seems to be terminating
 746                  * EAP-TTLS/MSHCAPV2 without the expected MS-CHAP-v2 Success
 747                  * packet. */
 748                 wpa_printf(MSG_DEBUG, "EAP-TTLS/MSCHAPV2: EAP workaround - "
 749                            "allow success without tunneled response");
 750                 ret->methodState = METHOD_MAY_CONT;
 751                 ret->decision = DECISION_COND_SUCC;
 752         }
 753
 754         return 0;
 755 }
 756
 757
 758 static int eap_ttls_phase2_request_mschap(struct eap_sm *sm,
 759                                           struct eap_ttls_data *data,
 760                                           struct eap_method_ret *ret,
 761                                           u8 **resp, size_t *resp_len)
 762 {
 763         struct wpa_ssid *config = eap_get_config(sm);
 764         u8 *buf, *pos, *challenge;
 765
 766         wpa_printf(MSG_DEBUG, "EAP-TTLS: Phase 2 MSCHAP Request");
 767
 768         pos = buf = os_malloc(config->identity_len + 1000);
 769         if (buf == NULL) {
 770                 wpa_printf(MSG_ERROR,
 771                            "EAP-TTLS/MSCHAP: Failed to allocate memory");
 772                 return -1;
 773         }
 774
 775         /* User-Name */
 776         pos = eap_ttls_avp_add(buf, pos, RADIUS_ATTR_USER_NAME, 0, 1,
 777                                config->identity, config->identity_len);
 778
 779         /* MS-CHAP-Challenge */
 780         challenge = eap_ttls_implicit_challenge(sm, data, EAP_TLS_KEY_LEN);
 781         if (challenge == NULL) {
 782                 os_free(buf);
 783                 wpa_printf(MSG_ERROR, "EAP-TTLS/MSCHAP: Failed to derive "
 784                            "implicit challenge");
 785                 return -1;
 786         }
 787
 788         pos = eap_ttls_avp_add(buf, pos, RADIUS_ATTR_MS_CHAP_CHALLENGE,
 789                                RADIUS_VENDOR_ID_MICROSOFT, 1,
 790                                challenge, EAP_TTLS_MSCHAP_CHALLENGE_LEN);
 791
 792         /* MS-CHAP-Response */
 793         pos = eap_ttls_avp_hdr(pos, RADIUS_ATTR_MS_CHAP_RESPONSE,
 794                                RADIUS_VENDOR_ID_MICROSOFT, 1,
 795                                EAP_TTLS_MSCHAP_RESPONSE_LEN);
 796         data->ident = challenge[EAP_TTLS_MSCHAP_CHALLENGE_LEN];
 797         *pos++ = data->ident;
 798         *pos++ = 1; /* Flags: Use NT style passwords */
 799         os_memset(pos, 0, 24); /* LM-Response */
 800         pos += 24;
 801         nt_challenge_response(challenge,
 802                               config->password, config->password_len,
 803                               pos); /* NT-Response */
 804         wpa_hexdump_ascii_key(MSG_DEBUG, "EAP-TTLS: MSCHAP password",
 805                               config->password, config->password_len);
 806         wpa_hexdump(MSG_DEBUG, "EAP-TTLS: MSCHAP implicit challenge",
 807                     challenge, EAP_TTLS_MSCHAP_CHALLENGE_LEN);
 808         wpa_hexdump(MSG_DEBUG, "EAP-TTLS: MSCHAP response", pos, 24);
 809         pos += 24;
 810         os_free(challenge);
 811         AVP_PAD(buf, pos);
 812
 813         *resp = buf;
 814         *resp_len = pos - buf;
 815
 816         if (data->ttls_version > 0) {
 817                 /* EAP-TTLSv1 uses TLS/IA FinalPhaseFinished to report success,
 818                  * so do not allow connection to be terminated yet. */
 819                 ret->methodState = METHOD_CONT;
 820                 ret->decision = DECISION_COND_SUCC;
 821         } else {
 822                 /* EAP-TTLS/MSCHAP does not provide tunneled success
 823                  * notification, so assume that Phase2 succeeds. */
 824                 ret->methodState = METHOD_DONE;
 825                 ret->decision = DECISION_COND_SUCC;
 826         }
 827
 828         return 0;
 829 }
 830
 831
 832 static int eap_ttls_phase2_request_pap(struct eap_sm *sm,
 833                                        struct eap_ttls_data *data,
 834                                        struct eap_method_ret *ret,
 835                                        u8 **resp, size_t *resp_len)
 836 {
 837         struct wpa_ssid *config = eap_get_config(sm);
 838         u8 *buf, *pos;
 839         size_t pad;
 840
 841         wpa_printf(MSG_DEBUG, "EAP-TTLS: Phase 2 PAP Request");
 842
 843         pos = buf = os_malloc(config->identity_len + config->password_len +
 844                               100);
 845         if (buf == NULL) {
 846                 wpa_printf(MSG_ERROR,
 847                            "EAP-TTLS/PAP: Failed to allocate memory");
 848                 return -1;
 849         }
 850
 851         /* User-Name */
 852         pos = eap_ttls_avp_add(buf, pos, RADIUS_ATTR_USER_NAME, 0, 1,
 853                                config->identity, config->identity_len);
 854
 855         /* User-Password; in RADIUS, this is encrypted, but EAP-TTLS encrypts
 856          * the data, so no separate encryption is used in the AVP itself.
 857          * However, the password is padded to obfuscate its length. */
 858         pad = (16 - (config->password_len & 15)) & 15;
 859         pos = eap_ttls_avp_hdr(pos, RADIUS_ATTR_USER_PASSWORD, 0, 1,
 860                                config->password_len + pad);
 861         os_memcpy(pos, config->password, config->password_len);
 862         pos += config->password_len;
 863         os_memset(pos, 0, pad);
 864         pos += pad;
 865         AVP_PAD(buf, pos);
 866
 867         *resp = buf;
 868         *resp_len = pos - buf;
 869
 870         if (data->ttls_version > 0) {
 871                 /* EAP-TTLSv1 uses TLS/IA FinalPhaseFinished to report success,
 872                  * so do not allow connection to be terminated yet. */
 873                 ret->methodState = METHOD_CONT;
 874                 ret->decision = DECISION_COND_SUCC;
 875         } else {
 876                 /* EAP-TTLS/PAP does not provide tunneled success notification,
 877                  * so assume that Phase2 succeeds. */
 878                 ret->methodState = METHOD_DONE;
 879                 ret->decision = DECISION_COND_SUCC;
 880         }
 881
 882         return 0;
 883 }
 884
 885
 886 static int eap_ttls_phase2_request_chap(struct eap_sm *sm,
 887                                         struct eap_ttls_data *data,
 888                                         struct eap_method_ret *ret,
 889                                         u8 **resp, size_t *resp_len)
 890 {
 891         struct wpa_ssid *config = eap_get_config(sm);
 892         u8 *buf, *pos, *challenge;
 893         const u8 *addr[3];
 894         size_t len[3];
 895
 896         wpa_printf(MSG_DEBUG, "EAP-TTLS: Phase 2 CHAP Request");
 897
 898         pos = buf = os_malloc(config->identity_len + 1000);
 899         if (buf == NULL) {
 900                 wpa_printf(MSG_ERROR,
 901                            "EAP-TTLS/CHAP: Failed to allocate memory");
 902                 return -1;
 903         }
 904
 905         /* User-Name */
 906         pos = eap_ttls_avp_add(buf, pos, RADIUS_ATTR_USER_NAME, 0, 1,
 907                                config->identity, config->identity_len);
 908
 909         /* CHAP-Challenge */
 910         challenge = eap_ttls_implicit_challenge(sm, data, EAP_TLS_KEY_LEN);
 911         if (challenge == NULL) {
 912                 os_free(buf);
 913                 wpa_printf(MSG_ERROR, "EAP-TTLS/CHAP: Failed to derive "
 914                            "implicit challenge");
 915                 return -1;
 916         }
 917
 918         pos = eap_ttls_avp_add(buf, pos, RADIUS_ATTR_CHAP_CHALLENGE, 0, 1,
 919                                challenge, EAP_TTLS_CHAP_CHALLENGE_LEN);
 920
 921         /* CHAP-Password */
 922         pos = eap_ttls_avp_hdr(pos, RADIUS_ATTR_CHAP_PASSWORD, 0, 1,
 923                                1 + EAP_TTLS_CHAP_PASSWORD_LEN);
 924         data->ident = challenge[EAP_TTLS_CHAP_CHALLENGE_LEN];
 925         *pos++ = data->ident;
 926
 927         /* MD5(Ident + Password + Challenge) */
 928         addr[0] = &data->ident;
 929         len[0] = 1;
 930         addr[1] = config->password;
 931         len[1] = config->password_len;
 932         addr[2] = challenge;
 933         len[2] = EAP_TTLS_CHAP_CHALLENGE_LEN;
 934         md5_vector(3, addr, len, pos);
 935
 936         wpa_hexdump_ascii(MSG_DEBUG, "EAP-TTLS: CHAP username",
 937                           config->identity, config->identity_len);
 938         wpa_hexdump_ascii_key(MSG_DEBUG, "EAP-TTLS: CHAP password",
 939                               config->password, config->password_len);
 940         wpa_hexdump(MSG_DEBUG, "EAP-TTLS: CHAP implicit challenge",
 941                     challenge, EAP_TTLS_CHAP_CHALLENGE_LEN);
 942         wpa_hexdump(MSG_DEBUG, "EAP-TTLS: CHAP password",
 943                     pos, EAP_TTLS_CHAP_PASSWORD_LEN);
 944         pos += EAP_TTLS_CHAP_PASSWORD_LEN;
 945         os_free(challenge);
 946         AVP_PAD(buf, pos);
 947
 948         *resp = buf;
 949         *resp_len = pos - buf;
 950
 951         if (data->ttls_version > 0) {
 952                 /* EAP-TTLSv1 uses TLS/IA FinalPhaseFinished to report success,
 953                  * so do not allow connection to be terminated yet. */
 954                 ret->methodState = METHOD_CONT;
 955                 ret->decision = DECISION_COND_SUCC;
 956         } else {
 957                 /* EAP-TTLS/CHAP does not provide tunneled success
 958                  * notification, so assume that Phase2 succeeds. */
 959                 ret->methodState = METHOD_DONE;
 960                 ret->decision = DECISION_COND_SUCC;
 961         }
 962
 963         return 0;
 964 }
 965
 966
 967 static int eap_ttls_phase2_request(struct eap_sm *sm,
 968                                    struct eap_ttls_data *data,
 969                                    struct eap_method_ret *ret,
 970                                    const struct eap_hdr *req,
 971                                    struct eap_hdr *hdr,
 972                                    u8 **resp, size_t *resp_len)
 973 {
 974         int res = 0;
 975         size_t len;
 976
 977         if (data->phase2_type == EAP_TTLS_PHASE2_MSCHAPV2 ||
 978             data->phase2_type == EAP_TTLS_PHASE2_MSCHAP ||
 979             data->phase2_type == EAP_TTLS_PHASE2_PAP ||
 980             data->phase2_type == EAP_TTLS_PHASE2_CHAP) {
 981                 if (eap_get_config_identity(sm, &len) == NULL) {
 982                         wpa_printf(MSG_INFO,
 983                                    "EAP-TTLS: Identity not configured");
 984                         eap_sm_request_identity(sm);
 985                         if (eap_get_config_password(sm, &len) == NULL)
 986                                 eap_sm_request_password(sm);
 987                         return 0;
 988                 }
 989
 990                 if (eap_get_config_password(sm, &len) == NULL) {
 991                         wpa_printf(MSG_INFO,
 992                                    "EAP-TTLS: Password not configured");
 993                         eap_sm_request_password(sm);
 994                         return 0;
 995                 }
 996         }
 997
 998         switch (data->phase2_type) {
 999         case EAP_TTLS_PHASE2_EAP:
1000                 res = eap_ttls_phase2_request_eap(sm, data, ret, hdr,
1001                                                   resp, resp_len);
1002                 break;
1003         case EAP_TTLS_PHASE2_MSCHAPV2:
1004                 res = eap_ttls_phase2_request_mschapv2(sm, data, ret,
1005                                                        resp, resp_len);
1006                 break;
1007         case EAP_TTLS_PHASE2_MSCHAP:
1008                 res = eap_ttls_phase2_request_mschap(sm, data, ret,
1009                                                      resp, resp_len);
1010                 break;
1011         case EAP_TTLS_PHASE2_PAP:
1012                 res = eap_ttls_phase2_request_pap(sm, data, ret,
1013                                                   resp, resp_len);
1014                 break;
1015         case EAP_TTLS_PHASE2_CHAP:
1016                 res = eap_ttls_phase2_request_chap(sm, data, ret,
1017                                                    resp, resp_len);
1018                 break;
1019         default:
1020                 wpa_printf(MSG_ERROR, "EAP-TTLS: Phase 2 - Unknown");
1021                 res = -1;
1022                 break;
1023         }
1024
1025         if (res < 0) {
1026                 ret->methodState = METHOD_DONE;
1027                 ret->decision = DECISION_FAIL;
1028         }
1029
1030         return res;
1031 }
1032
1033
1034 static u8 * eap_ttls_build_phase_finished(struct eap_sm *sm,
1035                                           struct eap_ttls_data *data,
1036                                           int id, int final,
1037                                           size_t *reqDataLen)
1038 {
1039         int len;
1040         struct eap_hdr *req;
1041         u8 *pos;
1042         const int max_len = 300;
1043
1044         len = sizeof(struct eap_hdr) + 2 + max_len;
1045         req = os_malloc(len);
1046         if (req == NULL)
1047                 return NULL;
1048
1049         req->code = EAP_CODE_RESPONSE;
1050         req->identifier = id;
1051
1052         pos = (u8 *) (req + 1);
1053         *pos++ = EAP_TYPE_TTLS;
1054         *pos++ = data->ttls_version;
1055
1056         len = tls_connection_ia_send_phase_finished(sm->ssl_ctx,
1057                                                     data->ssl.conn,
1058                                                     final, pos, max_len);
1059         if (len < 0) {
1060                 os_free(req);
1061                 return NULL;
1062         }
1063
1064         *reqDataLen = sizeof(struct eap_hdr) + 2 + len;
1065         req->length = host_to_be16(*reqDataLen);
1066
1067         return (u8 *) req;
1068 }
1069
1070
1071 static int eap_ttls_decrypt(struct eap_sm *sm, struct eap_ttls_data *data,
1072                             struct eap_method_ret *ret,
1073                             const struct eap_hdr *req,
1074                             const u8 *in_data, size_t in_len,
1075                             u8 **out_data, size_t *out_len)
1076 {
1077         u8 *in_decrypted = NULL, *pos;
1078         int res, retval = 0;
1079         struct eap_hdr *hdr = NULL;
1080         u8 *resp = NULL, *mschapv2 = NULL, *eapdata = NULL;
1081         size_t resp_len, eap_len = 0, len_decrypted = 0, len, buf_len, left;
1082         struct ttls_avp *avp;
1083         u8 recv_response[20];
1084         int mschapv2_error = 0;
1085         struct wpa_ssid *config = eap_get_config(sm);
1086         const u8 *msg;
1087         size_t msg_len;
1088         int need_more_input;
1089
1090         wpa_printf(MSG_DEBUG, "EAP-TTLS: received %lu bytes encrypted data for"
1091                    " Phase 2", (unsigned long) in_len);
1092
1093         if (data->pending_phase2_req) {
1094                 wpa_printf(MSG_DEBUG, "EAP-TTLS: Pending Phase 2 request - "
1095                            "skip decryption and use old data");
1096                 /* Clear TLS reassembly state. */
1097                 os_free(data->ssl.tls_in);
1098                 data->ssl.tls_in = NULL;
1099                 data->ssl.tls_in_len = 0;
1100                 data->ssl.tls_in_left = 0;
1101                 data->ssl.tls_in_total = 0;
1102
1103                 in_decrypted = data->pending_phase2_req;
1104                 data->pending_phase2_req = NULL;
1105                 len_decrypted = data->pending_phase2_req_len;
1106                 if (data->pending_phase2_req_len == 0) {
1107                         os_free(in_decrypted);
1108                         in_decrypted = NULL;
1109                         goto fake_req_identity;
1110                 }
1111                 goto continue_req;
1112         }
1113
1114         if (in_len == 0 && data->phase2_start) {
1115                 data->phase2_start = 0;
1116                 /* EAP-TTLS does not use Phase2 on fast re-auth; this must be
1117                  * done only if TLS part was indeed resuming a previous
1118                  * session. Most Authentication Servers terminate EAP-TTLS
1119                  * before reaching this point, but some do not. Make
1120                  * wpa_supplicant stop phase 2 here, if needed. */
1121                 if (data->reauth &&
1122                     tls_connection_resumed(sm->ssl_ctx, data->ssl.conn)) {
1123                         wpa_printf(MSG_DEBUG, "EAP-TTLS: Session resumption - "
1124                                    "skip phase 2");
1125                         *out_data = eap_tls_build_ack(&data->ssl, out_len,
1126                                                       req->identifier,
1127                                                       EAP_TYPE_TTLS, 0);
1128                         ret->methodState = METHOD_DONE;
1129                         ret->decision = DECISION_UNCOND_SUCC;
1130                         data->phase2_success = 1;
1131                         return 0;
1132                 }
1133         fake_req_identity:
1134                 wpa_printf(MSG_DEBUG, "EAP-TTLS: empty data in beginning of "
1135                            "Phase 2 - use fake EAP-Request Identity");
1136                 buf_len = sizeof(*hdr) + 1;
1137                 in_decrypted = os_malloc(buf_len);
1138                 if (in_decrypted == NULL) {
1139                         wpa_printf(MSG_WARNING, "EAP-TTLS: failed to allocate "
1140                                    "memory for fake EAP-Identity Request");
1141                         retval = -1;
1142                         goto done;
1143                 }
1144                 hdr = (struct eap_hdr *) in_decrypted;
1145                 hdr->code = EAP_CODE_REQUEST;
1146                 hdr->identifier = 0;
1147                 hdr->length = host_to_be16(sizeof(*hdr) + 1);
1148                 in_decrypted[sizeof(*hdr)] = EAP_TYPE_IDENTITY;
1149                 goto process_eap;
1150         }
1151
1152         msg = eap_tls_data_reassemble(sm, &data->ssl, in_data, in_len,
1153                                       &msg_len, &need_more_input);
1154         if (msg == NULL)
1155                 return need_more_input ? 1 : -1;
1156
1157         buf_len = in_len;
1158         if (data->ssl.tls_in_total > buf_len)
1159                 buf_len = data->ssl.tls_in_total;
1160         in_decrypted = os_malloc(buf_len);
1161         if (in_decrypted == NULL) {
1162                 os_free(data->ssl.tls_in);
1163                 data->ssl.tls_in = NULL;
1164                 data->ssl.tls_in_len = 0;
1165                 wpa_printf(MSG_WARNING, "EAP-TTLS: failed to allocate memory "
1166                            "for decryption");
1167                 retval = -1;
1168                 goto done;
1169         }
1170
1171         res = tls_connection_decrypt(sm->ssl_ctx, data->ssl.conn,
1172                                      msg, msg_len, in_decrypted, buf_len);
1173         os_free(data->ssl.tls_in);
1174         data->ssl.tls_in = NULL;
1175         data->ssl.tls_in_len = 0;
1176         if (res < 0) {
1177                 wpa_printf(MSG_INFO, "EAP-TTLS: Failed to decrypt Phase 2 "
1178                            "data");
1179                 retval = -1;
1180                 goto done;
1181         }
1182         len_decrypted = res;
1183
1184         if (data->ttls_version > 0 && len_decrypted == 0 &&
1185             tls_connection_ia_final_phase_finished(sm->ssl_ctx,
1186                                                    data->ssl.conn)) {
1187                 wpa_printf(MSG_DEBUG, "EAP-TTLS: FinalPhaseFinished received");
1188                 wpa_printf(MSG_INFO, "EAP-TTLS: TLS/IA authentication "
1189                            "succeeded");
1190                 ret->methodState = METHOD_DONE;
1191                 ret->decision = DECISION_UNCOND_SUCC;
1192                 data->phase2_success = 1;
1193                 *out_data = eap_ttls_build_phase_finished(sm, data,
1194                                                           req->identifier, 1,
1195                                                           out_len);
1196                 eap_ttls_v1_derive_key(sm, data);
1197                 goto done;
1198         }
1199
1200 continue_req:
1201         data->phase2_start = 0;
1202
1203         wpa_hexdump(MSG_DEBUG, "EAP-TTLS: Decrypted Phase 2 AVPs",
1204                     in_decrypted, len_decrypted);
1205         if (len_decrypted < sizeof(struct ttls_avp)) {
1206                 wpa_printf(MSG_WARNING, "EAP-TTLS: Too short Phase 2 AVP frame"
1207                            " len=%lu expected %lu or more - dropped",
1208                            (unsigned long) len_decrypted,
1209                            (unsigned long) sizeof(struct ttls_avp));
1210                 retval = -1;
1211                 goto done;
1212         }
1213
1214         /* Parse AVPs */
1215         pos = in_decrypted;
1216         left = len_decrypted;
1217         mschapv2 = NULL;
1218
1219         while (left > 0) {
1220                 u32 avp_code, avp_length, vendor_id = 0;
1221                 u8 avp_flags, *dpos;
1222                 size_t pad, dlen;
1223                 avp = (struct ttls_avp *) pos;
1224                 avp_code = be_to_host32(avp->avp_code);
1225                 avp_length = be_to_host32(avp->avp_length);
1226                 avp_flags = (avp_length >> 24) & 0xff;
1227                 avp_length &= 0xffffff;
1228                 wpa_printf(MSG_DEBUG, "EAP-TTLS: AVP: code=%d flags=0x%02x "
1229                            "length=%d", (int) avp_code, avp_flags,
1230                            (int) avp_length);
1231                 if (avp_length > left) {
1232                         wpa_printf(MSG_WARNING, "EAP-TTLS: AVP overflow "
1233                                    "(len=%d, left=%lu) - dropped",
1234                                    (int) avp_length, (unsigned long) left);
1235                         retval = -1;
1236                         goto done;
1237                 }
1238                 if (avp_length < sizeof(*avp)) {
1239                         wpa_printf(MSG_WARNING, "EAP-TTLS: Invalid AVP length "
1240                                    "%d", avp_length);
1241                         retval = -1;
1242                         goto done;
1243                 }
1244                 dpos = (u8 *) (avp + 1);
1245                 dlen = avp_length - sizeof(*avp);
1246                 if (avp_flags & AVP_FLAGS_VENDOR) {
1247                         if (dlen < 4) {
1248                                 wpa_printf(MSG_WARNING, "EAP-TTLS: vendor AVP "
1249                                            "underflow");
1250                                 retval = -1;
1251                                 goto done;
1252                         }
1253                         vendor_id = be_to_host32(* (u32 *) dpos);
1254                         wpa_printf(MSG_DEBUG, "EAP-TTLS: AVP vendor_id %d",
1255                                    (int) vendor_id);
1256                         dpos += 4;
1257                         dlen -= 4;
1258                 }
1259
1260                 wpa_hexdump(MSG_DEBUG, "EAP-TTLS: AVP data", dpos, dlen);
1261
1262                 if (vendor_id == 0 && avp_code == RADIUS_ATTR_EAP_MESSAGE) {
1263                         wpa_printf(MSG_DEBUG, "EAP-TTLS: AVP - EAP Message");
1264                         if (eapdata == NULL) {
1265                                 eapdata = os_malloc(dlen);
1266                                 if (eapdata == NULL) {
1267                                         retval = -1;
1268                                         wpa_printf(MSG_WARNING, "EAP-TTLS: "
1269                                                    "failed to allocate memory "
1270                                                    "for Phase 2 EAP data");
1271                                         goto done;
1272                                 }
1273                                 os_memcpy(eapdata, dpos, dlen);
1274                                 eap_len = dlen;
1275                         } else {
1276                                 u8 *neweap = os_realloc(eapdata,
1277                                                         eap_len + dlen);
1278                                 if (neweap == NULL) {
1279                                         retval = -1;
1280                                         wpa_printf(MSG_WARNING, "EAP-TTLS: "
1281                                                    "failed to allocate memory "
1282                                                    "for Phase 2 EAP data");
1283                                         goto done;
1284                                 }
1285                                 os_memcpy(neweap + eap_len, dpos, dlen);
1286                                 eapdata = neweap;
1287                                 eap_len += dlen;
1288                         }
1289                 } else if (vendor_id == 0 &&
1290                            avp_code == RADIUS_ATTR_REPLY_MESSAGE) {
1291                         /* This is an optional message that can be displayed to
1292                          * the user. */
1293                         wpa_hexdump_ascii(MSG_DEBUG,
1294                                           "EAP-TTLS: AVP - Reply-Message",
1295                                           dpos, dlen);
1296                 } else if (vendor_id == RADIUS_VENDOR_ID_MICROSOFT &&
1297                            avp_code == RADIUS_ATTR_MS_CHAP2_SUCCESS) {
1298                         wpa_hexdump_ascii(MSG_DEBUG, "EAP-TTLS: "
1299                                           "MS-CHAP2-Success", dpos, dlen);
1300                         if (dlen != 43) {
1301                                 wpa_printf(MSG_WARNING, "EAP-TTLS: Unexpected "
1302                                            "MS-CHAP2-Success length "
1303                                            "(len=%lu, expected 43)",
1304                                            (unsigned long) dlen);
1305                                 retval = -1;
1306                                 break;
1307                         }
1308                         mschapv2 = dpos;
1309                 } else if (vendor_id == RADIUS_VENDOR_ID_MICROSOFT &&
1310                            avp_code == RADIUS_ATTR_MS_CHAP_ERROR) {
1311                         wpa_hexdump_ascii(MSG_DEBUG, "EAP-TTLS: "
1312                                           "MS-CHAP-Error", dpos, dlen);
1313                         mschapv2_error = 1;
1314                 } else if (avp_flags & AVP_FLAGS_MANDATORY) {
1315                         wpa_printf(MSG_WARNING, "EAP-TTLS: Unsupported "
1316                                    "mandatory AVP code %d vendor_id %d - "
1317                                    "dropped", (int) avp_code, (int) vendor_id);
1318                         retval = -1;
1319                         goto done;
1320                 } else {
1321                         wpa_printf(MSG_DEBUG, "EAP-TTLS: Ignoring unsupported "
1322                                    "AVP code %d vendor_id %d",
1323                                    (int) avp_code, (int) vendor_id);
1324                 }
1325
1326                 pad = (4 - (avp_length & 3)) & 3;
1327                 pos += avp_length + pad;
1328                 if (left < avp_length + pad)
1329                         left = 0;
1330                 else
1331                         left -= avp_length + pad;
1332         }
1333
1334         switch (data->phase2_type) {
1335         case EAP_TTLS_PHASE2_EAP:
1336                 if (eapdata == NULL) {
1337                         wpa_printf(MSG_WARNING, "EAP-TTLS: No EAP Message in "
1338                                    "the packet - dropped");
1339                         retval = -1;
1340                         goto done;
1341                 }
1342
1343                 wpa_hexdump(MSG_DEBUG, "EAP-TTLS: Phase 2 EAP",
1344                             eapdata, eap_len);
1345                 hdr = (struct eap_hdr *) eapdata;
1346
1347                 if (eap_len < sizeof(*hdr)) {
1348                         wpa_printf(MSG_WARNING, "EAP-TTLS: Too short Phase 2 "
1349                                    "EAP frame (len=%lu, expected %lu or more) "
1350                                    "- dropped", (unsigned long) eap_len,
1351                                    (unsigned long) sizeof(*hdr));
1352                         retval = -1;
1353                         goto done;
1354                 }
1355                 len = be_to_host16(hdr->length);
1356                 if (len > eap_len) {
1357                         wpa_printf(MSG_INFO, "EAP-TTLS: Length mismatch in "
1358                                    "Phase 2 EAP frame (EAP hdr len=%lu, EAP "
1359                                    "data len in AVP=%lu)",
1360                                    (unsigned long) len,
1361                                    (unsigned long) eap_len);
1362                         retval = -1;
1363                         goto done;
1364                 }
1365                 wpa_printf(MSG_DEBUG, "EAP-TTLS: received Phase 2: code=%d "
1366                            "identifier=%d length=%lu",
1367                            hdr->code, hdr->identifier, (unsigned long) len);
1368         process_eap:
1369                 switch (hdr->code) {
1370                 case EAP_CODE_REQUEST:
1371                         if (eap_ttls_phase2_request(sm, data, ret, req, hdr,
1372                                                     &resp, &resp_len)) {
1373                                 wpa_printf(MSG_INFO, "EAP-TTLS: Phase2 "
1374                                            "Request processing failed");
1375                                 retval = -1;
1376                                 goto done;
1377                         }
1378                         break;
1379                 default:
1380                         wpa_printf(MSG_INFO, "EAP-TTLS: Unexpected code=%d in "
1381                                    "Phase 2 EAP header", hdr->code);
1382                         retval = -1;
1383                         break;
1384                 }
1385                 break;
1386         case EAP_TTLS_PHASE2_MSCHAPV2:
1387                 if (mschapv2_error) {
1388                         wpa_printf(MSG_DEBUG, "EAP-TTLS/MSCHAPV2: Received "
1389                                    "MS-CHAP-Error - failed");
1390                         ret->methodState = METHOD_DONE;
1391                         ret->decision = DECISION_FAIL;
1392                         *out_data = eap_tls_build_ack(&data->ssl, out_len,
1393                                                       req->identifier,
1394                                                       EAP_TYPE_TTLS, 0);
1395                         break;
1396                 }
1397
1398                 if (mschapv2 == NULL) {
1399                         wpa_printf(MSG_WARNING, "EAP-TTLS: no MS-CHAP2-Success"
1400                                    " AVP received for Phase2 MSCHAPV2");
1401                         retval = -1;
1402                         break;
1403                 }
1404                 if (mschapv2[0] != data->ident) {
1405                         wpa_printf(MSG_WARNING, "EAP-TTLS: Ident mismatch "
1406                                    "for Phase 2 MSCHAPV2 (received Ident "
1407                                    "0x%02x, expected 0x%02x)",
1408                                    mschapv2[0], data->ident);
1409                         retval = -1;
1410                         break;
1411                 }
1412                 if (!data->auth_response_valid ||
1413                     mschapv2[1] != 'S' || mschapv2[2] != '=' ||
1414                     hexstr2bin((char *) (mschapv2 + 3), recv_response, 20) ||
1415                     os_memcmp(data->auth_response, recv_response, 20) != 0) {
1416                         wpa_printf(MSG_WARNING, "EAP-TTLS: Invalid "
1417                                    "authenticator response in Phase 2 "
1418                                    "MSCHAPV2 success request");
1419                         retval = -1;
1420                         break;
1421                 }
1422
1423                 wpa_printf(MSG_INFO, "EAP-TTLS: Phase 2 MSCHAPV2 "
1424                            "authentication succeeded");
1425                 if (data->ttls_version > 0) {
1426                         /* EAP-TTLSv1 uses TLS/IA FinalPhaseFinished to report
1427                          * success, so do not allow connection to be terminated
1428                          * yet. */
1429                         ret->methodState = METHOD_CONT;
1430                         ret->decision = DECISION_COND_SUCC;
1431                 } else {
1432                         ret->methodState = METHOD_DONE;
1433                         ret->decision = DECISION_UNCOND_SUCC;
1434                         data->phase2_success = 1;
1435                 }
1436
1437                 /* Reply with empty data; authentication server will reply
1438                  * with EAP-Success after this. */
1439                 retval = 1;
1440                 goto done;
1441         case EAP_TTLS_PHASE2_MSCHAP:
1442         case EAP_TTLS_PHASE2_PAP:
1443         case EAP_TTLS_PHASE2_CHAP:
1444                 /* EAP-TTLS/{MSCHAP,PAP,CHAP} should not send any TLS tunneled
1445                  * requests to the supplicant */
1446                 wpa_printf(MSG_INFO, "EAP-TTLS: Phase 2 received unexpected "
1447                            "tunneled data");
1448                 retval = -1;
1449                 break;
1450         }
1451
1452         if (resp) {
1453                 wpa_hexdump_key(MSG_DEBUG, "EAP-TTLS: Encrypting Phase 2 data",
1454                                 resp, resp_len);
1455
1456                 if (eap_ttls_encrypt(sm, data, req->identifier,
1457                                      resp, resp_len, out_data, out_len)) {
1458                         wpa_printf(MSG_INFO, "EAP-TTLS: Failed to encrypt "
1459                                    "a Phase 2 frame");
1460                 }
1461                 os_free(resp);
1462         } else if (config->pending_req_identity ||
1463                    config->pending_req_password ||
1464                    config->pending_req_otp ||
1465                    config->pending_req_new_password) {
1466                 os_free(data->pending_phase2_req);
1467                 data->pending_phase2_req = os_malloc(len_decrypted);
1468                 if (data->pending_phase2_req) {
1469                         os_memcpy(data->pending_phase2_req, in_decrypted,
1470                                   len_decrypted);
1471                         data->pending_phase2_req_len = len_decrypted;
1472                 }
1473         }
1474
1475 done:
1476         os_free(in_decrypted);
1477         os_free(eapdata);
1478
1479         if (retval < 0) {
1480                 ret->methodState = METHOD_DONE;
1481                 ret->decision = DECISION_FAIL;
1482         }
1483
1484         return retval;
1485 }
1486
1487
1488 static u8 * eap_ttls_process(struct eap_sm *sm, void *priv,
1489                              struct eap_method_ret *ret,
1490                              const u8 *reqData, size_t reqDataLen,
1491                              size_t *respDataLen)
1492 {
1493         const struct eap_hdr *req;
1494         size_t left;
1495         int res;
1496         u8 flags, *resp, id;
1497         const u8 *pos;
1498         struct eap_ttls_data *data = priv;
1499         struct wpa_ssid *config = eap_get_config(sm);
1500
1501         pos = eap_tls_process_init(sm, &data->ssl, EAP_TYPE_TTLS, ret,
1502                                    reqData, reqDataLen, &left, &flags);
1503         if (pos == NULL)
1504                 return NULL;
1505         req = (const struct eap_hdr *) reqData;
1506         id = req->identifier;
1507
1508         if (flags & EAP_TLS_FLAGS_START) {
1509                 wpa_printf(MSG_DEBUG, "EAP-TTLS: Start (server ver=%d, own "
1510                            "ver=%d)", flags & EAP_PEAP_VERSION_MASK,
1511                            data->ttls_version);
1512                 if ((flags & EAP_PEAP_VERSION_MASK) < data->ttls_version)
1513                         data->ttls_version = flags & EAP_PEAP_VERSION_MASK;
1514                 if (data->force_ttls_version >= 0 &&
1515                     data->force_ttls_version != data->ttls_version) {
1516                         wpa_printf(MSG_WARNING, "EAP-TTLS: Failed to select "
1517                                    "forced TTLS version %d",
1518                                    data->force_ttls_version);
1519                         ret->methodState = METHOD_DONE;
1520                         ret->decision = DECISION_FAIL;
1521                         ret->allowNotifications = FALSE;
1522                         return NULL;
1523                 }
1524                 wpa_printf(MSG_DEBUG, "EAP-TTLS: Using TTLS version %d",
1525                            data->ttls_version);
1526
1527                 if (data->ttls_version > 0)
1528                         data->ssl.tls_ia = 1;
1529                 if (!data->ssl_initialized &&
1530                     eap_tls_ssl_init(sm, &data->ssl, config)) {
1531                         wpa_printf(MSG_INFO, "EAP-TTLS: Failed to initialize "
1532                                    "SSL.");
1533                         return NULL;
1534                 }
1535                 data->ssl_initialized = 1;
1536
1537                 wpa_printf(MSG_DEBUG, "EAP-TTLS: Start");
1538                 /* draft-ietf-pppext-eap-ttls-03.txt, Ch. 8.1:
1539                  * EAP-TTLS Start packet may, in a future specification, be
1540                  * allowed to contain data. Client based on this draft version
1541                  * must ignore such data but must not reject the Start packet.
1542                  */
1543                 left = 0;
1544         } else if (!data->ssl_initialized) {
1545                 wpa_printf(MSG_DEBUG, "EAP-TTLS: First message did not "
1546                            "include Start flag");
1547                 ret->methodState = METHOD_DONE;
1548                 ret->decision = DECISION_FAIL;
1549                 ret->allowNotifications = FALSE;
1550                 return NULL;
1551         }
1552
1553         resp = NULL;
1554         if (tls_connection_established(sm->ssl_ctx, data->ssl.conn) &&
1555             !data->resuming) {
1556                 res = eap_ttls_decrypt(sm, data, ret, req, pos, left,
1557                                        &resp, respDataLen);
1558         } else {
1559                 res = eap_tls_process_helper(sm, &data->ssl, EAP_TYPE_TTLS,
1560                                              data->ttls_version, id, pos, left,
1561                                              &resp, respDataLen);
1562
1563                 if (tls_connection_established(sm->ssl_ctx, data->ssl.conn)) {
1564                         wpa_printf(MSG_DEBUG,
1565                                    "EAP-TTLS: TLS done, proceed to Phase 2");
1566                         if (data->resuming) {
1567                                 wpa_printf(MSG_DEBUG, "EAP-TTLS: fast reauth -"
1568                                            " may skip Phase 2");
1569                                 ret->decision = DECISION_COND_SUCC;
1570                                 ret->methodState = METHOD_MAY_CONT;
1571                         }
1572                         data->phase2_start = 1;
1573                         if (data->ttls_version == 0)
1574                                 eap_ttls_v0_derive_key(sm, data);
1575
1576                         if (*respDataLen == 0) {
1577                                 if (eap_ttls_decrypt(sm, data, ret, req, NULL,
1578                                                      0, &resp, respDataLen)) {
1579                                         wpa_printf(MSG_WARNING, "EAP-TTLS: "
1580                                                    "failed to process early "
1581                                                    "start for Phase 2");
1582                                 }
1583                                 res = 0;
1584                         }
1585                         data->resuming = 0;
1586                 }
1587
1588                 if (res == 2) {
1589                         /*
1590                          * Application data included in the handshake message.
1591                          */
1592                         os_free(data->pending_phase2_req);
1593                         data->pending_phase2_req = resp;
1594                         data->pending_phase2_req_len = *respDataLen;
1595                         resp = NULL;
1596                         *respDataLen = 0;
1597                         res = eap_ttls_decrypt(sm, data, ret, req, pos, left,
1598                                                &resp, respDataLen);
1599                 }
1600         }
1601
1602         if (data->ttls_version == 0 && ret->methodState == METHOD_DONE) {
1603                 ret->allowNotifications = FALSE;
1604                 if (ret->decision == DECISION_UNCOND_SUCC ||
1605                     ret->decision == DECISION_COND_SUCC) {
1606                         wpa_printf(MSG_DEBUG, "EAP-TTLS: Authentication "
1607                                    "completed successfully");
1608                         data->phase2_success = 1;
1609                 }
1610         } else if (data->ttls_version == 0 && sm->workaround &&
1611                    ret->methodState == METHOD_MAY_CONT &&
1612                    (ret->decision == DECISION_UNCOND_SUCC ||
1613                     ret->decision == DECISION_COND_SUCC)) {
1614                         wpa_printf(MSG_DEBUG, "EAP-TTLS: Authentication "
1615                                    "completed successfully (EAP workaround)");
1616                         data->phase2_success = 1;
1617         }
1618
1619         if (res == 1) {
1620                 return eap_tls_build_ack(&data->ssl, respDataLen, id,
1621                                          EAP_TYPE_TTLS, data->ttls_version);
1622         }
1623         return resp;
1624 }
1625
1626
1627 static Boolean eap_ttls_has_reauth_data(struct eap_sm *sm, void *priv)
1628 {
1629         struct eap_ttls_data *data = priv;
1630         return tls_connection_established(sm->ssl_ctx, data->ssl.conn) &&
1631                 data->phase2_success;
1632 }
1633
1634
1635 static void eap_ttls_deinit_for_reauth(struct eap_sm *sm, void *priv)
1636 {
1637         struct eap_ttls_data *data = priv;
1638         os_free(data->pending_phase2_req);
1639         data->pending_phase2_req = NULL;
1640 }
1641
1642
1643 static void * eap_ttls_init_for_reauth(struct eap_sm *sm, void *priv)
1644 {
1645         struct eap_ttls_data *data = priv;
1646         os_free(data->key_data);
1647         data->key_data = NULL;
1648         if (eap_tls_reauth_init(sm, &data->ssl)) {
1649                 os_free(data);
1650                 return NULL;
1651         }
1652         if (data->phase2_priv && data->phase2_method &&
1653             data->phase2_method->init_for_reauth)
1654                 data->phase2_method->init_for_reauth(sm, data->phase2_priv);
1655         data->phase2_start = 0;
1656         data->phase2_success = 0;
1657         data->resuming = 1;
1658         data->reauth = 1;
1659         return priv;
1660 }
1661
1662
1663 static int eap_ttls_get_status(struct eap_sm *sm, void *priv, char *buf,
1664                                size_t buflen, int verbose)
1665 {
1666         struct eap_ttls_data *data = priv;
1667         int len, ret;
1668
1669         len = eap_tls_status(sm, &data->ssl, buf, buflen, verbose);
1670         ret = os_snprintf(buf + len, buflen - len,
1671                           "EAP-TTLSv%d Phase2 method=",
1672                           data->ttls_version);
1673         if (ret < 0 || (size_t) ret >= buflen - len)
1674                 return len;
1675         len += ret;
1676         switch (data->phase2_type) {
1677         case EAP_TTLS_PHASE2_EAP:
1678                 ret = os_snprintf(buf + len, buflen - len, "EAP-%s\n",
1679                                   data->phase2_method ?
1680                                   data->phase2_method->name : "?");
1681                 break;
1682         case EAP_TTLS_PHASE2_MSCHAPV2:
1683                 ret = os_snprintf(buf + len, buflen - len, "MSCHAPV2\n");
1684                 break;
1685         case EAP_TTLS_PHASE2_MSCHAP:
1686                 ret = os_snprintf(buf + len, buflen - len, "MSCHAP\n");
1687                 break;
1688         case EAP_TTLS_PHASE2_PAP:
1689                 ret = os_snprintf(buf + len, buflen - len, "PAP\n");
1690                 break;
1691         case EAP_TTLS_PHASE2_CHAP:
1692                 ret = os_snprintf(buf + len, buflen - len, "CHAP\n");
1693                 break;
1694         default:
1695                 ret = 0;
1696                 break;
1697         }
1698         if (ret < 0 || (size_t) ret >= buflen - len)
1699                 return len;
1700         len += ret;
1701
1702         return len;
1703 }
1704
1705
1706 static Boolean eap_ttls_isKeyAvailable(struct eap_sm *sm, void *priv)
1707 {
1708         struct eap_ttls_data *data = priv;
1709         return data->key_data != NULL && data->phase2_success;
1710 }
1711
1712
1713 static u8 * eap_ttls_getKey(struct eap_sm *sm, void *priv, size_t *len)
1714 {
1715         struct eap_ttls_data *data = priv;
1716         u8 *key;
1717
1718         if (data->key_data == NULL || !data->phase2_success)
1719                 return NULL;
1720
1721         key = os_malloc(EAP_TLS_KEY_LEN);
1722         if (key == NULL)
1723                 return NULL;
1724
1725         *len = EAP_TLS_KEY_LEN;
1726         os_memcpy(key, data->key_data, EAP_TLS_KEY_LEN);
1727
1728         return key;
1729 }
1730
1731
1732 int eap_peer_ttls_register(void)
1733 {
1734         struct eap_method *eap;
1735         int ret;
1736
1737         eap = eap_peer_method_alloc(EAP_PEER_METHOD_INTERFACE_VERSION,
1738                                     EAP_VENDOR_IETF, EAP_TYPE_TTLS, "TTLS");
1739         if (eap == NULL)
1740                 return -1;
1741
1742         eap->init = eap_ttls_init;
1743         eap->deinit = eap_ttls_deinit;
1744         eap->process = eap_ttls_process;
1745         eap->isKeyAvailable = eap_ttls_isKeyAvailable;
1746         eap->getKey = eap_ttls_getKey;
1747         eap->get_status = eap_ttls_get_status;
1748         eap->has_reauth_data = eap_ttls_has_reauth_data;
1749         eap->deinit_for_reauth = eap_ttls_deinit_for_reauth;
1750         eap->init_for_reauth = eap_ttls_init_for_reauth;
1751
1752         ret = eap_peer_method_register(eap);
1753         if (ret)
1754                 eap_peer_method_free(eap);
1755         return ret;
1756 }