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 + 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(
 781                 sm, data, EAP_TTLS_MSCHAP_CHALLENGE_LEN + 1);
 782         if (challenge == NULL) {
 783                 os_free(buf);
 784                 wpa_printf(MSG_ERROR, "EAP-TTLS/MSCHAP: Failed to derive "
 785                            "implicit challenge");
 786                 return -1;
 787         }
 788
 789         pos = eap_ttls_avp_add(buf, pos, RADIUS_ATTR_MS_CHAP_CHALLENGE,
 790                                RADIUS_VENDOR_ID_MICROSOFT, 1,
 791                                challenge, EAP_TTLS_MSCHAP_CHALLENGE_LEN);
 792
 793         /* MS-CHAP-Response */
 794         pos = eap_ttls_avp_hdr(pos, RADIUS_ATTR_MS_CHAP_RESPONSE,
 795                                RADIUS_VENDOR_ID_MICROSOFT, 1,
 796                                EAP_TTLS_MSCHAP_RESPONSE_LEN);
 797         data->ident = challenge[EAP_TTLS_MSCHAP_CHALLENGE_LEN];
 798         *pos++ = data->ident;
 799         *pos++ = 1; /* Flags: Use NT style passwords */
 800         os_memset(pos, 0, 24); /* LM-Response */
 801         pos += 24;
 802         nt_challenge_response(challenge,
 803                               config->password, config->password_len,
 804                               pos); /* NT-Response */
 805         wpa_hexdump_ascii_key(MSG_DEBUG, "EAP-TTLS: MSCHAP password",
 806                               config->password, config->password_len);
 807         wpa_hexdump(MSG_DEBUG, "EAP-TTLS: MSCHAP implicit challenge",
 808                     challenge, EAP_TTLS_MSCHAP_CHALLENGE_LEN);
 809         wpa_hexdump(MSG_DEBUG, "EAP-TTLS: MSCHAP response", pos, 24);
 810         pos += 24;
 811         os_free(challenge);
 812         AVP_PAD(buf, pos);
 813
 814         *resp = buf;
 815         *resp_len = pos - buf;
 816
 817         if (data->ttls_version > 0) {
 818                 /* EAP-TTLSv1 uses TLS/IA FinalPhaseFinished to report success,
 819                  * so do not allow connection to be terminated yet. */
 820                 ret->methodState = METHOD_CONT;
 821                 ret->decision = DECISION_COND_SUCC;
 822         } else {
 823                 /* EAP-TTLS/MSCHAP does not provide tunneled success
 824                  * notification, so assume that Phase2 succeeds. */
 825                 ret->methodState = METHOD_DONE;
 826                 ret->decision = DECISION_COND_SUCC;
 827         }
 828
 829         return 0;
 830 }
 831
 832
 833 static int eap_ttls_phase2_request_pap(struct eap_sm *sm,
 834                                        struct eap_ttls_data *data,
 835                                        struct eap_method_ret *ret,
 836                                        u8 **resp, size_t *resp_len)
 837 {
 838         struct wpa_ssid *config = eap_get_config(sm);
 839         u8 *buf, *pos;
 840         size_t pad;
 841
 842         wpa_printf(MSG_DEBUG, "EAP-TTLS: Phase 2 PAP Request");
 843
 844         pos = buf = os_malloc(config->identity_len + config->password_len +
 845                               100);
 846         if (buf == NULL) {
 847                 wpa_printf(MSG_ERROR,
 848                            "EAP-TTLS/PAP: Failed to allocate memory");
 849                 return -1;
 850         }
 851
 852         /* User-Name */
 853         pos = eap_ttls_avp_add(buf, pos, RADIUS_ATTR_USER_NAME, 0, 1,
 854                                config->identity, config->identity_len);
 855
 856         /* User-Password; in RADIUS, this is encrypted, but EAP-TTLS encrypts
 857          * the data, so no separate encryption is used in the AVP itself.
 858          * However, the password is padded to obfuscate its length. */
 859         pad = (16 - (config->password_len & 15)) & 15;
 860         pos = eap_ttls_avp_hdr(pos, RADIUS_ATTR_USER_PASSWORD, 0, 1,
 861                                config->password_len + pad);
 862         os_memcpy(pos, config->password, config->password_len);
 863         pos += config->password_len;
 864         os_memset(pos, 0, pad);
 865         pos += pad;
 866         AVP_PAD(buf, pos);
 867
 868         *resp = buf;
 869         *resp_len = pos - buf;
 870
 871         if (data->ttls_version > 0) {
 872                 /* EAP-TTLSv1 uses TLS/IA FinalPhaseFinished to report success,
 873                  * so do not allow connection to be terminated yet. */
 874                 ret->methodState = METHOD_CONT;
 875                 ret->decision = DECISION_COND_SUCC;
 876         } else {
 877                 /* EAP-TTLS/PAP does not provide tunneled success notification,
 878                  * so assume that Phase2 succeeds. */
 879                 ret->methodState = METHOD_DONE;
 880                 ret->decision = DECISION_COND_SUCC;
 881         }
 882
 883         return 0;
 884 }
 885
 886
 887 static int eap_ttls_phase2_request_chap(struct eap_sm *sm,
 888                                         struct eap_ttls_data *data,
 889                                         struct eap_method_ret *ret,
 890                                         u8 **resp, size_t *resp_len)
 891 {
 892         struct wpa_ssid *config = eap_get_config(sm);
 893         u8 *buf, *pos, *challenge;
 894         const u8 *addr[3];
 895         size_t len[3];
 896
 897         wpa_printf(MSG_DEBUG, "EAP-TTLS: Phase 2 CHAP Request");
 898
 899         pos = buf = os_malloc(config->identity_len + 1000);
 900         if (buf == NULL) {
 901                 wpa_printf(MSG_ERROR,
 902                            "EAP-TTLS/CHAP: Failed to allocate memory");
 903                 return -1;
 904         }
 905
 906         /* User-Name */
 907         pos = eap_ttls_avp_add(buf, pos, RADIUS_ATTR_USER_NAME, 0, 1,
 908                                config->identity, config->identity_len);
 909
 910         /* CHAP-Challenge */
 911         challenge = eap_ttls_implicit_challenge(
 912                 sm, data, EAP_TTLS_CHAP_CHALLENGE_LEN + 1);
 913         if (challenge == NULL) {
 914                 os_free(buf);
 915                 wpa_printf(MSG_ERROR, "EAP-TTLS/CHAP: Failed to derive "
 916                            "implicit challenge");
 917                 return -1;
 918         }
 919
 920         pos = eap_ttls_avp_add(buf, pos, RADIUS_ATTR_CHAP_CHALLENGE, 0, 1,
 921                                challenge, EAP_TTLS_CHAP_CHALLENGE_LEN);
 922
 923         /* CHAP-Password */
 924         pos = eap_ttls_avp_hdr(pos, RADIUS_ATTR_CHAP_PASSWORD, 0, 1,
 925                                1 + EAP_TTLS_CHAP_PASSWORD_LEN);
 926         data->ident = challenge[EAP_TTLS_CHAP_CHALLENGE_LEN];
 927         *pos++ = data->ident;
 928
 929         /* MD5(Ident + Password + Challenge) */
 930         addr[0] = &data->ident;
 931         len[0] = 1;
 932         addr[1] = config->password;
 933         len[1] = config->password_len;
 934         addr[2] = challenge;
 935         len[2] = EAP_TTLS_CHAP_CHALLENGE_LEN;
 936         md5_vector(3, addr, len, pos);
 937
 938         wpa_hexdump_ascii(MSG_DEBUG, "EAP-TTLS: CHAP username",
 939                           config->identity, config->identity_len);
 940         wpa_hexdump_ascii_key(MSG_DEBUG, "EAP-TTLS: CHAP password",
 941                               config->password, config->password_len);
 942         wpa_hexdump(MSG_DEBUG, "EAP-TTLS: CHAP implicit challenge",
 943                     challenge, EAP_TTLS_CHAP_CHALLENGE_LEN);
 944         wpa_hexdump(MSG_DEBUG, "EAP-TTLS: CHAP password",
 945                     pos, EAP_TTLS_CHAP_PASSWORD_LEN);
 946         pos += EAP_TTLS_CHAP_PASSWORD_LEN;
 947         os_free(challenge);
 948         AVP_PAD(buf, pos);
 949
 950         *resp = buf;
 951         *resp_len = pos - buf;
 952
 953         if (data->ttls_version > 0) {
 954                 /* EAP-TTLSv1 uses TLS/IA FinalPhaseFinished to report success,
 955                  * so do not allow connection to be terminated yet. */
 956                 ret->methodState = METHOD_CONT;
 957                 ret->decision = DECISION_COND_SUCC;
 958         } else {
 959                 /* EAP-TTLS/CHAP does not provide tunneled success
 960                  * notification, so assume that Phase2 succeeds. */
 961                 ret->methodState = METHOD_DONE;
 962                 ret->decision = DECISION_COND_SUCC;
 963         }
 964
 965         return 0;
 966 }
 967
 968
 969 static int eap_ttls_phase2_request(struct eap_sm *sm,
 970                                    struct eap_ttls_data *data,
 971                                    struct eap_method_ret *ret,
 972                                    const struct eap_hdr *req,
 973                                    struct eap_hdr *hdr,
 974                                    u8 **resp, size_t *resp_len)
 975 {
 976         int res = 0;
 977         size_t len;
 978
 979         if (data->phase2_type == EAP_TTLS_PHASE2_MSCHAPV2 ||
 980             data->phase2_type == EAP_TTLS_PHASE2_MSCHAP ||
 981             data->phase2_type == EAP_TTLS_PHASE2_PAP ||
 982             data->phase2_type == EAP_TTLS_PHASE2_CHAP) {
 983                 if (eap_get_config_identity(sm, &len) == NULL) {
 984                         wpa_printf(MSG_INFO,
 985                                    "EAP-TTLS: Identity not configured");
 986                         eap_sm_request_identity(sm);
 987                         if (eap_get_config_password(sm, &len) == NULL)
 988                                 eap_sm_request_password(sm);
 989                         return 0;
 990                 }
 991
 992                 if (eap_get_config_password(sm, &len) == NULL) {
 993                         wpa_printf(MSG_INFO,
 994                                    "EAP-TTLS: Password not configured");
 995                         eap_sm_request_password(sm);
 996                         return 0;
 997                 }
 998         }
 999
1000         switch (data->phase2_type) {
1001         case EAP_TTLS_PHASE2_EAP:
1002                 res = eap_ttls_phase2_request_eap(sm, data, ret, hdr,
1003                                                   resp, resp_len);
1004                 break;
1005         case EAP_TTLS_PHASE2_MSCHAPV2:
1006                 res = eap_ttls_phase2_request_mschapv2(sm, data, ret,
1007                                                        resp, resp_len);
1008                 break;
1009         case EAP_TTLS_PHASE2_MSCHAP:
1010                 res = eap_ttls_phase2_request_mschap(sm, data, ret,
1011                                                      resp, resp_len);
1012                 break;
1013         case EAP_TTLS_PHASE2_PAP:
1014                 res = eap_ttls_phase2_request_pap(sm, data, ret,
1015                                                   resp, resp_len);
1016                 break;
1017         case EAP_TTLS_PHASE2_CHAP:
1018                 res = eap_ttls_phase2_request_chap(sm, data, ret,
1019                                                    resp, resp_len);
1020                 break;
1021         default:
1022                 wpa_printf(MSG_ERROR, "EAP-TTLS: Phase 2 - Unknown");
1023                 res = -1;
1024                 break;
1025         }
1026
1027         if (res < 0) {
1028                 ret->methodState = METHOD_DONE;
1029                 ret->decision = DECISION_FAIL;
1030         }
1031
1032         return res;
1033 }
1034
1035
1036 static u8 * eap_ttls_build_phase_finished(struct eap_sm *sm,
1037                                           struct eap_ttls_data *data,
1038                                           int id, int final,
1039                                           size_t *reqDataLen)
1040 {
1041         int len;
1042         struct eap_hdr *req;
1043         u8 *pos;
1044         const int max_len = 300;
1045
1046         len = sizeof(struct eap_hdr) + 2 + max_len;
1047         req = os_malloc(len);
1048         if (req == NULL)
1049                 return NULL;
1050
1051         req->code = EAP_CODE_RESPONSE;
1052         req->identifier = id;
1053
1054         pos = (u8 *) (req + 1);
1055         *pos++ = EAP_TYPE_TTLS;
1056         *pos++ = data->ttls_version;
1057
1058         len = tls_connection_ia_send_phase_finished(sm->ssl_ctx,
1059                                                     data->ssl.conn,
1060                                                     final, pos, max_len);
1061         if (len < 0) {
1062                 os_free(req);
1063                 return NULL;
1064         }
1065
1066         *reqDataLen = sizeof(struct eap_hdr) + 2 + len;
1067         req->length = host_to_be16(*reqDataLen);
1068
1069         return (u8 *) req;
1070 }
1071
1072
1073 static int eap_ttls_decrypt(struct eap_sm *sm, struct eap_ttls_data *data,
1074                             struct eap_method_ret *ret,
1075                             const struct eap_hdr *req,
1076                             const u8 *in_data, size_t in_len,
1077                             u8 **out_data, size_t *out_len)
1078 {
1079         u8 *in_decrypted = NULL, *pos;
1080         int res, retval = 0;
1081         struct eap_hdr *hdr = NULL;
1082         u8 *resp = NULL, *mschapv2 = NULL, *eapdata = NULL;
1083         size_t resp_len, eap_len = 0, len_decrypted = 0, len, buf_len, left;
1084         struct ttls_avp *avp;
1085         u8 recv_response[20];
1086         int mschapv2_error = 0;
1087         struct wpa_ssid *config = eap_get_config(sm);
1088         const u8 *msg;
1089         size_t msg_len;
1090         int need_more_input;
1091
1092         wpa_printf(MSG_DEBUG, "EAP-TTLS: received %lu bytes encrypted data for"
1093                    " Phase 2", (unsigned long) in_len);
1094
1095         if (data->pending_phase2_req) {
1096                 wpa_printf(MSG_DEBUG, "EAP-TTLS: Pending Phase 2 request - "
1097                            "skip decryption and use old data");
1098                 /* Clear TLS reassembly state. */
1099                 os_free(data->ssl.tls_in);
1100                 data->ssl.tls_in = NULL;
1101                 data->ssl.tls_in_len = 0;
1102                 data->ssl.tls_in_left = 0;
1103                 data->ssl.tls_in_total = 0;
1104
1105                 in_decrypted = data->pending_phase2_req;
1106                 data->pending_phase2_req = NULL;
1107                 len_decrypted = data->pending_phase2_req_len;
1108                 if (data->pending_phase2_req_len == 0) {
1109                         os_free(in_decrypted);
1110                         in_decrypted = NULL;
1111                         goto fake_req_identity;
1112                 }
1113                 goto continue_req;
1114         }
1115
1116         if (in_len == 0 && data->phase2_start) {
1117                 data->phase2_start = 0;
1118                 /* EAP-TTLS does not use Phase2 on fast re-auth; this must be
1119                  * done only if TLS part was indeed resuming a previous
1120                  * session. Most Authentication Servers terminate EAP-TTLS
1121                  * before reaching this point, but some do not. Make
1122                  * wpa_supplicant stop phase 2 here, if needed. */
1123                 if (data->reauth &&
1124                     tls_connection_resumed(sm->ssl_ctx, data->ssl.conn)) {
1125                         wpa_printf(MSG_DEBUG, "EAP-TTLS: Session resumption - "
1126                                    "skip phase 2");
1127                         *out_data = eap_tls_build_ack(&data->ssl, out_len,
1128                                                       req->identifier,
1129                                                       EAP_TYPE_TTLS, 0);
1130                         ret->methodState = METHOD_DONE;
1131                         ret->decision = DECISION_UNCOND_SUCC;
1132                         data->phase2_success = 1;
1133                         return 0;
1134                 }
1135         fake_req_identity:
1136                 wpa_printf(MSG_DEBUG, "EAP-TTLS: empty data in beginning of "
1137                            "Phase 2 - use fake EAP-Request Identity");
1138                 buf_len = sizeof(*hdr) + 1;
1139                 in_decrypted = os_malloc(buf_len);
1140                 if (in_decrypted == NULL) {
1141                         wpa_printf(MSG_WARNING, "EAP-TTLS: failed to allocate "
1142                                    "memory for fake EAP-Identity Request");
1143                         retval = -1;
1144                         goto done;
1145                 }
1146                 hdr = (struct eap_hdr *) in_decrypted;
1147                 hdr->code = EAP_CODE_REQUEST;
1148                 hdr->identifier = 0;
1149                 hdr->length = host_to_be16(sizeof(*hdr) + 1);
1150                 in_decrypted[sizeof(*hdr)] = EAP_TYPE_IDENTITY;
1151                 goto process_eap;
1152         }
1153
1154         msg = eap_tls_data_reassemble(sm, &data->ssl, in_data, in_len,
1155                                       &msg_len, &need_more_input);
1156         if (msg == NULL)
1157                 return need_more_input ? 1 : -1;
1158
1159         buf_len = in_len;
1160         if (data->ssl.tls_in_total > buf_len)
1161                 buf_len = data->ssl.tls_in_total;
1162         in_decrypted = os_malloc(buf_len);
1163         if (in_decrypted == NULL) {
1164                 os_free(data->ssl.tls_in);
1165                 data->ssl.tls_in = NULL;
1166                 data->ssl.tls_in_len = 0;
1167                 wpa_printf(MSG_WARNING, "EAP-TTLS: failed to allocate memory "
1168                            "for decryption");
1169                 retval = -1;
1170                 goto done;
1171         }
1172
1173         res = tls_connection_decrypt(sm->ssl_ctx, data->ssl.conn,
1174                                      msg, msg_len, in_decrypted, buf_len);
1175         os_free(data->ssl.tls_in);
1176         data->ssl.tls_in = NULL;
1177         data->ssl.tls_in_len = 0;
1178         if (res < 0) {
1179                 wpa_printf(MSG_INFO, "EAP-TTLS: Failed to decrypt Phase 2 "
1180                            "data");
1181                 retval = -1;
1182                 goto done;
1183         }
1184         len_decrypted = res;
1185
1186         if (data->ttls_version > 0 && len_decrypted == 0 &&
1187             tls_connection_ia_final_phase_finished(sm->ssl_ctx,
1188                                                    data->ssl.conn)) {
1189                 wpa_printf(MSG_DEBUG, "EAP-TTLS: FinalPhaseFinished received");
1190                 wpa_printf(MSG_INFO, "EAP-TTLS: TLS/IA authentication "
1191                            "succeeded");
1192                 ret->methodState = METHOD_DONE;
1193                 ret->decision = DECISION_UNCOND_SUCC;
1194                 data->phase2_success = 1;
1195                 *out_data = eap_ttls_build_phase_finished(sm, data,
1196                                                           req->identifier, 1,
1197                                                           out_len);
1198                 eap_ttls_v1_derive_key(sm, data);
1199                 goto done;
1200         }
1201
1202 continue_req:
1203         data->phase2_start = 0;
1204
1205         wpa_hexdump(MSG_DEBUG, "EAP-TTLS: Decrypted Phase 2 AVPs",
1206                     in_decrypted, len_decrypted);
1207         if (len_decrypted < sizeof(struct ttls_avp)) {
1208                 wpa_printf(MSG_WARNING, "EAP-TTLS: Too short Phase 2 AVP frame"
1209                            " len=%lu expected %lu or more - dropped",
1210                            (unsigned long) len_decrypted,
1211                            (unsigned long) sizeof(struct ttls_avp));
1212                 retval = -1;
1213                 goto done;
1214         }
1215
1216         /* Parse AVPs */
1217         pos = in_decrypted;
1218         left = len_decrypted;
1219         mschapv2 = NULL;
1220
1221         while (left > 0) {
1222                 u32 avp_code, avp_length, vendor_id = 0;
1223                 u8 avp_flags, *dpos;
1224                 size_t pad, dlen;
1225                 avp = (struct ttls_avp *) pos;
1226                 avp_code = be_to_host32(avp->avp_code);
1227                 avp_length = be_to_host32(avp->avp_length);
1228                 avp_flags = (avp_length >> 24) & 0xff;
1229                 avp_length &= 0xffffff;
1230                 wpa_printf(MSG_DEBUG, "EAP-TTLS: AVP: code=%d flags=0x%02x "
1231                            "length=%d", (int) avp_code, avp_flags,
1232                            (int) avp_length);
1233                 if (avp_length > left) {
1234                         wpa_printf(MSG_WARNING, "EAP-TTLS: AVP overflow "
1235                                    "(len=%d, left=%lu) - dropped",
1236                                    (int) avp_length, (unsigned long) left);
1237                         retval = -1;
1238                         goto done;
1239                 }
1240                 if (avp_length < sizeof(*avp)) {
1241                         wpa_printf(MSG_WARNING, "EAP-TTLS: Invalid AVP length "
1242                                    "%d", avp_length);
1243                         retval = -1;
1244                         goto done;
1245                 }
1246                 dpos = (u8 *) (avp + 1);
1247                 dlen = avp_length - sizeof(*avp);
1248                 if (avp_flags & AVP_FLAGS_VENDOR) {
1249                         if (dlen < 4) {
1250                                 wpa_printf(MSG_WARNING, "EAP-TTLS: vendor AVP "
1251                                            "underflow");
1252                                 retval = -1;
1253                                 goto done;
1254                         }
1255                         vendor_id = be_to_host32(* (u32 *) dpos);
1256                         wpa_printf(MSG_DEBUG, "EAP-TTLS: AVP vendor_id %d",
1257                                    (int) vendor_id);
1258                         dpos += 4;
1259                         dlen -= 4;
1260                 }
1261
1262                 wpa_hexdump(MSG_DEBUG, "EAP-TTLS: AVP data", dpos, dlen);
1263
1264                 if (vendor_id == 0 && avp_code == RADIUS_ATTR_EAP_MESSAGE) {
1265                         wpa_printf(MSG_DEBUG, "EAP-TTLS: AVP - EAP Message");
1266                         if (eapdata == NULL) {
1267                                 eapdata = os_malloc(dlen);
1268                                 if (eapdata == NULL) {
1269                                         retval = -1;
1270                                         wpa_printf(MSG_WARNING, "EAP-TTLS: "
1271                                                    "failed to allocate memory "
1272                                                    "for Phase 2 EAP data");
1273                                         goto done;
1274                                 }
1275                                 os_memcpy(eapdata, dpos, dlen);
1276                                 eap_len = dlen;
1277                         } else {
1278                                 u8 *neweap = os_realloc(eapdata,
1279                                                         eap_len + dlen);
1280                                 if (neweap == NULL) {
1281                                         retval = -1;
1282                                         wpa_printf(MSG_WARNING, "EAP-TTLS: "
1283                                                    "failed to allocate memory "
1284                                                    "for Phase 2 EAP data");
1285                                         goto done;
1286                                 }
1287                                 os_memcpy(neweap + eap_len, dpos, dlen);
1288                                 eapdata = neweap;
1289                                 eap_len += dlen;
1290                         }
1291                 } else if (vendor_id == 0 &&
1292                            avp_code == RADIUS_ATTR_REPLY_MESSAGE) {
1293                         /* This is an optional message that can be displayed to
1294                          * the user. */
1295                         wpa_hexdump_ascii(MSG_DEBUG,
1296                                           "EAP-TTLS: AVP - Reply-Message",
1297                                           dpos, dlen);
1298                 } else if (vendor_id == RADIUS_VENDOR_ID_MICROSOFT &&
1299                            avp_code == RADIUS_ATTR_MS_CHAP2_SUCCESS) {
1300                         wpa_hexdump_ascii(MSG_DEBUG, "EAP-TTLS: "
1301                                           "MS-CHAP2-Success", dpos, dlen);
1302                         if (dlen != 43) {
1303                                 wpa_printf(MSG_WARNING, "EAP-TTLS: Unexpected "
1304                                            "MS-CHAP2-Success length "
1305                                            "(len=%lu, expected 43)",
1306                                            (unsigned long) dlen);
1307                                 retval = -1;
1308                                 break;
1309                         }
1310                         mschapv2 = dpos;
1311                 } else if (vendor_id == RADIUS_VENDOR_ID_MICROSOFT &&
1312                            avp_code == RADIUS_ATTR_MS_CHAP_ERROR) {
1313                         wpa_hexdump_ascii(MSG_DEBUG, "EAP-TTLS: "
1314                                           "MS-CHAP-Error", dpos, dlen);
1315                         mschapv2_error = 1;
1316                 } else if (avp_flags & AVP_FLAGS_MANDATORY) {
1317                         wpa_printf(MSG_WARNING, "EAP-TTLS: Unsupported "
1318                                    "mandatory AVP code %d vendor_id %d - "
1319                                    "dropped", (int) avp_code, (int) vendor_id);
1320                         retval = -1;
1321                         goto done;
1322                 } else {
1323                         wpa_printf(MSG_DEBUG, "EAP-TTLS: Ignoring unsupported "
1324                                    "AVP code %d vendor_id %d",
1325                                    (int) avp_code, (int) vendor_id);
1326                 }
1327
1328                 pad = (4 - (avp_length & 3)) & 3;
1329                 pos += avp_length + pad;
1330                 if (left < avp_length + pad)
1331                         left = 0;
1332                 else
1333                         left -= avp_length + pad;
1334         }
1335
1336         switch (data->phase2_type) {
1337         case EAP_TTLS_PHASE2_EAP:
1338                 if (eapdata == NULL) {
1339                         wpa_printf(MSG_WARNING, "EAP-TTLS: No EAP Message in "
1340                                    "the packet - dropped");
1341                         retval = -1;
1342                         goto done;
1343                 }
1344
1345                 wpa_hexdump(MSG_DEBUG, "EAP-TTLS: Phase 2 EAP",
1346                             eapdata, eap_len);
1347                 hdr = (struct eap_hdr *) eapdata;
1348
1349                 if (eap_len < sizeof(*hdr)) {
1350                         wpa_printf(MSG_WARNING, "EAP-TTLS: Too short Phase 2 "
1351                                    "EAP frame (len=%lu, expected %lu or more) "
1352                                    "- dropped", (unsigned long) eap_len,
1353                                    (unsigned long) sizeof(*hdr));
1354                         retval = -1;
1355                         goto done;
1356                 }
1357                 len = be_to_host16(hdr->length);
1358                 if (len > eap_len) {
1359                         wpa_printf(MSG_INFO, "EAP-TTLS: Length mismatch in "
1360                                    "Phase 2 EAP frame (EAP hdr len=%lu, EAP "
1361                                    "data len in AVP=%lu)",
1362                                    (unsigned long) len,
1363                                    (unsigned long) eap_len);
1364                         retval = -1;
1365                         goto done;
1366                 }
1367                 wpa_printf(MSG_DEBUG, "EAP-TTLS: received Phase 2: code=%d "
1368                            "identifier=%d length=%lu",
1369                            hdr->code, hdr->identifier, (unsigned long) len);
1370         process_eap:
1371                 switch (hdr->code) {
1372                 case EAP_CODE_REQUEST:
1373                         if (eap_ttls_phase2_request(sm, data, ret, req, hdr,
1374                                                     &resp, &resp_len)) {
1375                                 wpa_printf(MSG_INFO, "EAP-TTLS: Phase2 "
1376                                            "Request processing failed");
1377                                 retval = -1;
1378                                 goto done;
1379                         }
1380                         break;
1381                 default:
1382                         wpa_printf(MSG_INFO, "EAP-TTLS: Unexpected code=%d in "
1383                                    "Phase 2 EAP header", hdr->code);
1384                         retval = -1;
1385                         break;
1386                 }
1387                 break;
1388         case EAP_TTLS_PHASE2_MSCHAPV2:
1389                 if (mschapv2_error) {
1390                         wpa_printf(MSG_DEBUG, "EAP-TTLS/MSCHAPV2: Received "
1391                                    "MS-CHAP-Error - failed");
1392                         ret->methodState = METHOD_DONE;
1393                         ret->decision = DECISION_FAIL;
1394                         *out_data = eap_tls_build_ack(&data->ssl, out_len,
1395                                                       req->identifier,
1396                                                       EAP_TYPE_TTLS, 0);
1397                         break;
1398                 }
1399
1400                 if (mschapv2 == NULL) {
1401                         wpa_printf(MSG_WARNING, "EAP-TTLS: no MS-CHAP2-Success"
1402                                    " AVP received for Phase2 MSCHAPV2");
1403                         retval = -1;
1404                         break;
1405                 }
1406                 if (mschapv2[0] != data->ident) {
1407                         wpa_printf(MSG_WARNING, "EAP-TTLS: Ident mismatch "
1408                                    "for Phase 2 MSCHAPV2 (received Ident "
1409                                    "0x%02x, expected 0x%02x)",
1410                                    mschapv2[0], data->ident);
1411                         retval = -1;
1412                         break;
1413                 }
1414                 if (!data->auth_response_valid ||
1415                     mschapv2[1] != 'S' || mschapv2[2] != '=' ||
1416                     hexstr2bin((char *) (mschapv2 + 3), recv_response, 20) ||
1417                     os_memcmp(data->auth_response, recv_response, 20) != 0) {
1418                         wpa_printf(MSG_WARNING, "EAP-TTLS: Invalid "
1419                                    "authenticator response in Phase 2 "
1420                                    "MSCHAPV2 success request");
1421                         retval = -1;
1422                         break;
1423                 }
1424
1425                 wpa_printf(MSG_INFO, "EAP-TTLS: Phase 2 MSCHAPV2 "
1426                            "authentication succeeded");
1427                 if (data->ttls_version > 0) {
1428                         /* EAP-TTLSv1 uses TLS/IA FinalPhaseFinished to report
1429                          * success, so do not allow connection to be terminated
1430                          * yet. */
1431                         ret->methodState = METHOD_CONT;
1432                         ret->decision = DECISION_COND_SUCC;
1433                 } else {
1434                         ret->methodState = METHOD_DONE;
1435                         ret->decision = DECISION_UNCOND_SUCC;
1436                         data->phase2_success = 1;
1437                 }
1438
1439                 /* Reply with empty data; authentication server will reply
1440                  * with EAP-Success after this. */
1441                 retval = 1;
1442                 goto done;
1443         case EAP_TTLS_PHASE2_MSCHAP:
1444         case EAP_TTLS_PHASE2_PAP:
1445         case EAP_TTLS_PHASE2_CHAP:
1446                 /* EAP-TTLS/{MSCHAP,PAP,CHAP} should not send any TLS tunneled
1447                  * requests to the supplicant */
1448                 wpa_printf(MSG_INFO, "EAP-TTLS: Phase 2 received unexpected "
1449                            "tunneled data");
1450                 retval = -1;
1451                 break;
1452         }
1453
1454         if (resp) {
1455                 wpa_hexdump_key(MSG_DEBUG, "EAP-TTLS: Encrypting Phase 2 data",
1456                                 resp, resp_len);
1457
1458                 if (eap_ttls_encrypt(sm, data, req->identifier,
1459                                      resp, resp_len, out_data, out_len)) {
1460                         wpa_printf(MSG_INFO, "EAP-TTLS: Failed to encrypt "
1461                                    "a Phase 2 frame");
1462                 }
1463                 os_free(resp);
1464         } else if (config->pending_req_identity ||
1465                    config->pending_req_password ||
1466                    config->pending_req_otp ||
1467                    config->pending_req_new_password) {
1468                 os_free(data->pending_phase2_req);
1469                 data->pending_phase2_req = os_malloc(len_decrypted);
1470                 if (data->pending_phase2_req) {
1471                         os_memcpy(data->pending_phase2_req, in_decrypted,
1472                                   len_decrypted);
1473                         data->pending_phase2_req_len = len_decrypted;
1474                 }
1475         }
1476
1477 done:
1478         os_free(in_decrypted);
1479         os_free(eapdata);
1480
1481         if (retval < 0) {
1482                 ret->methodState = METHOD_DONE;
1483                 ret->decision = DECISION_FAIL;
1484         }
1485
1486         return retval;
1487 }
1488
1489
1490 static u8 * eap_ttls_process(struct eap_sm *sm, void *priv,
1491                              struct eap_method_ret *ret,
1492                              const u8 *reqData, size_t reqDataLen,
1493                              size_t *respDataLen)
1494 {
1495         const struct eap_hdr *req;
1496         size_t left;
1497         int res;
1498         u8 flags, *resp, id;
1499         const u8 *pos;
1500         struct eap_ttls_data *data = priv;
1501         struct wpa_ssid *config = eap_get_config(sm);
1502
1503         pos = eap_tls_process_init(sm, &data->ssl, EAP_TYPE_TTLS, ret,
1504                                    reqData, reqDataLen, &left, &flags);
1505         if (pos == NULL)
1506                 return NULL;
1507         req = (const struct eap_hdr *) reqData;
1508         id = req->identifier;
1509
1510         if (flags & EAP_TLS_FLAGS_START) {
1511                 wpa_printf(MSG_DEBUG, "EAP-TTLS: Start (server ver=%d, own "
1512                            "ver=%d)", flags & EAP_PEAP_VERSION_MASK,
1513                            data->ttls_version);
1514                 if ((flags & EAP_PEAP_VERSION_MASK) < data->ttls_version)
1515                         data->ttls_version = flags & EAP_PEAP_VERSION_MASK;
1516                 if (data->force_ttls_version >= 0 &&
1517                     data->force_ttls_version != data->ttls_version) {
1518                         wpa_printf(MSG_WARNING, "EAP-TTLS: Failed to select "
1519                                    "forced TTLS version %d",
1520                                    data->force_ttls_version);
1521                         ret->methodState = METHOD_DONE;
1522                         ret->decision = DECISION_FAIL;
1523                         ret->allowNotifications = FALSE;
1524                         return NULL;
1525                 }
1526                 wpa_printf(MSG_DEBUG, "EAP-TTLS: Using TTLS version %d",
1527                            data->ttls_version);
1528
1529                 if (data->ttls_version > 0)
1530                         data->ssl.tls_ia = 1;
1531                 if (!data->ssl_initialized &&
1532                     eap_tls_ssl_init(sm, &data->ssl, config)) {
1533                         wpa_printf(MSG_INFO, "EAP-TTLS: Failed to initialize "
1534                                    "SSL.");
1535                         return NULL;
1536                 }
1537                 data->ssl_initialized = 1;
1538
1539                 wpa_printf(MSG_DEBUG, "EAP-TTLS: Start");
1540                 /* draft-ietf-pppext-eap-ttls-03.txt, Ch. 8.1:
1541                  * EAP-TTLS Start packet may, in a future specification, be
1542                  * allowed to contain data. Client based on this draft version
1543                  * must ignore such data but must not reject the Start packet.
1544                  */
1545                 left = 0;
1546         } else if (!data->ssl_initialized) {
1547                 wpa_printf(MSG_DEBUG, "EAP-TTLS: First message did not "
1548                            "include Start flag");
1549                 ret->methodState = METHOD_DONE;
1550                 ret->decision = DECISION_FAIL;
1551                 ret->allowNotifications = FALSE;
1552                 return NULL;
1553         }
1554
1555         resp = NULL;
1556         if (tls_connection_established(sm->ssl_ctx, data->ssl.conn) &&
1557             !data->resuming) {
1558                 res = eap_ttls_decrypt(sm, data, ret, req, pos, left,
1559                                        &resp, respDataLen);
1560         } else {
1561                 res = eap_tls_process_helper(sm, &data->ssl, EAP_TYPE_TTLS,
1562                                              data->ttls_version, id, pos, left,
1563                                              &resp, respDataLen);
1564
1565                 if (tls_connection_established(sm->ssl_ctx, data->ssl.conn)) {
1566                         wpa_printf(MSG_DEBUG,
1567                                    "EAP-TTLS: TLS done, proceed to Phase 2");
1568                         if (data->resuming) {
1569                                 wpa_printf(MSG_DEBUG, "EAP-TTLS: fast reauth -"
1570                                            " may skip Phase 2");
1571                                 ret->decision = DECISION_COND_SUCC;
1572                                 ret->methodState = METHOD_MAY_CONT;
1573                         }
1574                         data->phase2_start = 1;
1575                         if (data->ttls_version == 0)
1576                                 eap_ttls_v0_derive_key(sm, data);
1577
1578                         if (*respDataLen == 0) {
1579                                 if (eap_ttls_decrypt(sm, data, ret, req, NULL,
1580                                                      0, &resp, respDataLen)) {
1581                                         wpa_printf(MSG_WARNING, "EAP-TTLS: "
1582                                                    "failed to process early "
1583                                                    "start for Phase 2");
1584                                 }
1585                                 res = 0;
1586                         }
1587                         data->resuming = 0;
1588                 }
1589
1590                 if (res == 2) {
1591                         /*
1592                          * Application data included in the handshake message.
1593                          */
1594                         os_free(data->pending_phase2_req);
1595                         data->pending_phase2_req = resp;
1596                         data->pending_phase2_req_len = *respDataLen;
1597                         resp = NULL;
1598                         *respDataLen = 0;
1599                         res = eap_ttls_decrypt(sm, data, ret, req, pos, left,
1600                                                &resp, respDataLen);
1601                 }
1602         }
1603
1604         if (data->ttls_version == 0 && ret->methodState == METHOD_DONE) {
1605                 ret->allowNotifications = FALSE;
1606                 if (ret->decision == DECISION_UNCOND_SUCC ||
1607                     ret->decision == DECISION_COND_SUCC) {
1608                         wpa_printf(MSG_DEBUG, "EAP-TTLS: Authentication "
1609                                    "completed successfully");
1610                         data->phase2_success = 1;
1611                 }
1612         } else if (data->ttls_version == 0 && sm->workaround &&
1613                    ret->methodState == METHOD_MAY_CONT &&
1614                    (ret->decision == DECISION_UNCOND_SUCC ||
1615                     ret->decision == DECISION_COND_SUCC)) {
1616                         wpa_printf(MSG_DEBUG, "EAP-TTLS: Authentication "
1617                                    "completed successfully (EAP workaround)");
1618                         data->phase2_success = 1;
1619         }
1620
1621         if (res == 1) {
1622                 return eap_tls_build_ack(&data->ssl, respDataLen, id,
1623                                          EAP_TYPE_TTLS, data->ttls_version);
1624         }
1625         return resp;
1626 }
1627
1628
1629 static Boolean eap_ttls_has_reauth_data(struct eap_sm *sm, void *priv)
1630 {
1631         struct eap_ttls_data *data = priv;
1632         return tls_connection_established(sm->ssl_ctx, data->ssl.conn) &&
1633                 data->phase2_success;
1634 }
1635
1636
1637 static void eap_ttls_deinit_for_reauth(struct eap_sm *sm, void *priv)
1638 {
1639         struct eap_ttls_data *data = priv;
1640         os_free(data->pending_phase2_req);
1641         data->pending_phase2_req = NULL;
1642 }
1643
1644
1645 static void * eap_ttls_init_for_reauth(struct eap_sm *sm, void *priv)
1646 {
1647         struct eap_ttls_data *data = priv;
1648         os_free(data->key_data);
1649         data->key_data = NULL;
1650         if (eap_tls_reauth_init(sm, &data->ssl)) {
1651                 os_free(data);
1652                 return NULL;
1653         }
1654         if (data->phase2_priv && data->phase2_method &&
1655             data->phase2_method->init_for_reauth)
1656                 data->phase2_method->init_for_reauth(sm, data->phase2_priv);
1657         data->phase2_start = 0;
1658         data->phase2_success = 0;
1659         data->resuming = 1;
1660         data->reauth = 1;
1661         return priv;
1662 }
1663
1664
1665 static int eap_ttls_get_status(struct eap_sm *sm, void *priv, char *buf,
1666                                size_t buflen, int verbose)
1667 {
1668         struct eap_ttls_data *data = priv;
1669         int len, ret;
1670
1671         len = eap_tls_status(sm, &data->ssl, buf, buflen, verbose);
1672         ret = os_snprintf(buf + len, buflen - len,
1673                           "EAP-TTLSv%d Phase2 method=",
1674                           data->ttls_version);
1675         if (ret < 0 || (size_t) ret >= buflen - len)
1676                 return len;
1677         len += ret;
1678         switch (data->phase2_type) {
1679         case EAP_TTLS_PHASE2_EAP:
1680                 ret = os_snprintf(buf + len, buflen - len, "EAP-%s\n",
1681                                   data->phase2_method ?
1682                                   data->phase2_method->name : "?");
1683                 break;
1684         case EAP_TTLS_PHASE2_MSCHAPV2:
1685                 ret = os_snprintf(buf + len, buflen - len, "MSCHAPV2\n");
1686                 break;
1687         case EAP_TTLS_PHASE2_MSCHAP:
1688                 ret = os_snprintf(buf + len, buflen - len, "MSCHAP\n");
1689                 break;
1690         case EAP_TTLS_PHASE2_PAP:
1691                 ret = os_snprintf(buf + len, buflen - len, "PAP\n");
1692                 break;
1693         case EAP_TTLS_PHASE2_CHAP:
1694                 ret = os_snprintf(buf + len, buflen - len, "CHAP\n");
1695                 break;
1696         default:
1697                 ret = 0;
1698                 break;
1699         }
1700         if (ret < 0 || (size_t) ret >= buflen - len)
1701                 return len;
1702         len += ret;
1703
1704         return len;
1705 }
1706
1707
1708 static Boolean eap_ttls_isKeyAvailable(struct eap_sm *sm, void *priv)
1709 {
1710         struct eap_ttls_data *data = priv;
1711         return data->key_data != NULL && data->phase2_success;
1712 }
1713
1714
1715 static u8 * eap_ttls_getKey(struct eap_sm *sm, void *priv, size_t *len)
1716 {
1717         struct eap_ttls_data *data = priv;
1718         u8 *key;
1719
1720         if (data->key_data == NULL || !data->phase2_success)
1721                 return NULL;
1722
1723         key = os_malloc(EAP_TLS_KEY_LEN);
1724         if (key == NULL)
1725                 return NULL;
1726
1727         *len = EAP_TLS_KEY_LEN;
1728         os_memcpy(key, data->key_data, EAP_TLS_KEY_LEN);
1729
1730         return key;
1731 }
1732
1733
1734 int eap_peer_ttls_register(void)
1735 {
1736         struct eap_method *eap;
1737         int ret;
1738
1739         eap = eap_peer_method_alloc(EAP_PEER_METHOD_INTERFACE_VERSION,
1740                                     EAP_VENDOR_IETF, EAP_TYPE_TTLS, "TTLS");
1741         if (eap == NULL)
1742                 return -1;
1743
1744         eap->init = eap_ttls_init;
1745         eap->deinit = eap_ttls_deinit;
1746         eap->process = eap_ttls_process;
1747         eap->isKeyAvailable = eap_ttls_isKeyAvailable;
1748         eap->getKey = eap_ttls_getKey;
1749         eap->get_status = eap_ttls_get_status;
1750         eap->has_reauth_data = eap_ttls_has_reauth_data;
1751         eap->deinit_for_reauth = eap_ttls_deinit_for_reauth;
1752         eap->init_for_reauth = eap_ttls_init_for_reauth;
1753
1754         ret = eap_peer_method_register(eap);
1755         if (ret)
1756                 eap_peer_method_free(eap);
1757         return ret;
1758 }