contrib/hostapd/src/eap_peer/eap_peap.c

   1 /*
   2  * EAP peer method: EAP-PEAP (draft-josefsson-pppext-eap-tls-eap-10.txt)
   3  * Copyright (c) 2004-2008, Jouni Malinen <j@w1.fi>
   4  *
   5  * This software may be distributed under the terms of the BSD license.
   6  * See README for more details.
   7  */
   8
   9 #include "includes.h"
  10
  11 #include "common.h"
  12 #include "crypto/sha1.h"
  13 #include "crypto/tls.h"
  14 #include "eap_common/eap_tlv_common.h"
  15 #include "eap_common/eap_peap_common.h"
  16 #include "eap_i.h"
  17 #include "eap_tls_common.h"
  18 #include "eap_config.h"
  19 #include "tncc.h"
  20
  21
  22 /* Maximum supported PEAP version
  23  * 0 = Microsoft's PEAP version 0; draft-kamath-pppext-peapv0-00.txt
  24  * 1 = draft-josefsson-ppext-eap-tls-eap-05.txt
  25  */
  26 #define EAP_PEAP_VERSION 1
  27
  28
  29 static void eap_peap_deinit(struct eap_sm *sm, void *priv);
  30
  31
  32 struct eap_peap_data {
  33         struct eap_ssl_data ssl;
  34
  35         int peap_version, force_peap_version, force_new_label;
  36
  37         const struct eap_method *phase2_method;
  38         void *phase2_priv;
  39         int phase2_success;
  40         int phase2_eap_success;
  41         int phase2_eap_started;
  42
  43         struct eap_method_type phase2_type;
  44         struct eap_method_type *phase2_types;
  45         size_t num_phase2_types;
  46
  47         int peap_outer_success; /* 0 = PEAP terminated on Phase 2 inner
  48                                  * EAP-Success
  49                                  * 1 = reply with tunneled EAP-Success to inner
  50                                  * EAP-Success and expect AS to send outer
  51                                  * (unencrypted) EAP-Success after this
  52                                  * 2 = reply with PEAP/TLS ACK to inner
  53                                  * EAP-Success and expect AS to send outer
  54                                  * (unencrypted) EAP-Success after this */
  55         int resuming; /* starting a resumed session */
  56         int reauth; /* reauthentication */
  57         u8 *key_data;
  58         u8 *session_id;
  59         size_t id_len;
  60
  61         struct wpabuf *pending_phase2_req;
  62         enum { NO_BINDING, OPTIONAL_BINDING, REQUIRE_BINDING } crypto_binding;
  63         int crypto_binding_used;
  64         u8 binding_nonce[32];
  65         u8 ipmk[40];
  66         u8 cmk[20];
  67         int soh; /* Whether IF-TNCCS-SOH (Statement of Health; Microsoft NAP)
  68                   * is enabled. */
  69 };
  70
  71
  72 static int eap_peap_parse_phase1(struct eap_peap_data *data,
  73                                  const char *phase1)
  74 {
  75         const char *pos;
  76
  77         pos = os_strstr(phase1, "peapver=");
  78         if (pos) {
  79                 data->force_peap_version = atoi(pos + 8);
  80                 data->peap_version = data->force_peap_version;
  81                 wpa_printf(MSG_DEBUG, "EAP-PEAP: Forced PEAP version %d",
  82                            data->force_peap_version);
  83         }
  84
  85         if (os_strstr(phase1, "peaplabel=1")) {
  86                 data->force_new_label = 1;
  87                 wpa_printf(MSG_DEBUG, "EAP-PEAP: Force new label for key "
  88                            "derivation");
  89         }
  90
  91         if (os_strstr(phase1, "peap_outer_success=0")) {
  92                 data->peap_outer_success = 0;
  93                 wpa_printf(MSG_DEBUG, "EAP-PEAP: terminate authentication on "
  94                            "tunneled EAP-Success");
  95         } else if (os_strstr(phase1, "peap_outer_success=1")) {
  96                 data->peap_outer_success = 1;
  97                 wpa_printf(MSG_DEBUG, "EAP-PEAP: send tunneled EAP-Success "
  98                            "after receiving tunneled EAP-Success");
  99         } else if (os_strstr(phase1, "peap_outer_success=2")) {
 100                 data->peap_outer_success = 2;
 101                 wpa_printf(MSG_DEBUG, "EAP-PEAP: send PEAP/TLS ACK after "
 102                            "receiving tunneled EAP-Success");
 103         }
 104
 105         if (os_strstr(phase1, "crypto_binding=0")) {
 106                 data->crypto_binding = NO_BINDING;
 107                 wpa_printf(MSG_DEBUG, "EAP-PEAP: Do not use cryptobinding");
 108         } else if (os_strstr(phase1, "crypto_binding=1")) {
 109                 data->crypto_binding = OPTIONAL_BINDING;
 110                 wpa_printf(MSG_DEBUG, "EAP-PEAP: Optional cryptobinding");
 111         } else if (os_strstr(phase1, "crypto_binding=2")) {
 112                 data->crypto_binding = REQUIRE_BINDING;
 113                 wpa_printf(MSG_DEBUG, "EAP-PEAP: Require cryptobinding");
 114         }
 115
 116 #ifdef EAP_TNC
 117         if (os_strstr(phase1, "tnc=soh2")) {
 118                 data->soh = 2;
 119                 wpa_printf(MSG_DEBUG, "EAP-PEAP: SoH version 2 enabled");
 120         } else if (os_strstr(phase1, "tnc=soh1")) {
 121                 data->soh = 1;
 122                 wpa_printf(MSG_DEBUG, "EAP-PEAP: SoH version 1 enabled");
 123         } else if (os_strstr(phase1, "tnc=soh")) {
 124                 data->soh = 2;
 125                 wpa_printf(MSG_DEBUG, "EAP-PEAP: SoH version 2 enabled");
 126         }
 127 #endif /* EAP_TNC */
 128
 129         return 0;
 130 }
 131
 132
 133 static void * eap_peap_init(struct eap_sm *sm)
 134 {
 135         struct eap_peap_data *data;
 136         struct eap_peer_config *config = eap_get_config(sm);
 137
 138         data = os_zalloc(sizeof(*data));
 139         if (data == NULL)
 140                 return NULL;
 141         sm->peap_done = FALSE;
 142         data->peap_version = EAP_PEAP_VERSION;
 143         data->force_peap_version = -1;
 144         data->peap_outer_success = 2;
 145         data->crypto_binding = OPTIONAL_BINDING;
 146
 147         if (config && config->phase1 &&
 148             eap_peap_parse_phase1(data, config->phase1) < 0) {
 149                 eap_peap_deinit(sm, data);
 150                 return NULL;
 151         }
 152
 153         if (eap_peer_select_phase2_methods(config, "auth=",
 154                                            &data->phase2_types,
 155                                            &data->num_phase2_types) < 0) {
 156                 eap_peap_deinit(sm, data);
 157                 return NULL;
 158         }
 159
 160         data->phase2_type.vendor = EAP_VENDOR_IETF;
 161         data->phase2_type.method = EAP_TYPE_NONE;
 162
 163         if (eap_peer_tls_ssl_init(sm, &data->ssl, config, EAP_TYPE_PEAP)) {
 164                 wpa_printf(MSG_INFO, "EAP-PEAP: Failed to initialize SSL.");
 165                 eap_peap_deinit(sm, data);
 166                 return NULL;
 167         }
 168
 169         return data;
 170 }
 171
 172
 173 static void eap_peap_deinit(struct eap_sm *sm, void *priv)
 174 {
 175         struct eap_peap_data *data = priv;
 176         if (data == NULL)
 177                 return;
 178         if (data->phase2_priv && data->phase2_method)
 179                 data->phase2_method->deinit(sm, data->phase2_priv);
 180         os_free(data->phase2_types);
 181         eap_peer_tls_ssl_deinit(sm, &data->ssl);
 182         os_free(data->key_data);
 183         os_free(data->session_id);
 184         wpabuf_free(data->pending_phase2_req);
 185         os_free(data);
 186 }
 187
 188
 189 /**
 190  * eap_tlv_build_nak - Build EAP-TLV NAK message
 191  * @id: EAP identifier for the header
 192  * @nak_type: TLV type (EAP_TLV_*)
 193  * Returns: Buffer to the allocated EAP-TLV NAK message or %NULL on failure
 194  *
 195  * This function builds an EAP-TLV NAK message. The caller is responsible for
 196  * freeing the returned buffer.
 197  */
 198 static struct wpabuf * eap_tlv_build_nak(int id, u16 nak_type)
 199 {
 200         struct wpabuf *msg;
 201
 202         msg = eap_msg_alloc(EAP_VENDOR_IETF, EAP_TYPE_TLV, 10,
 203                             EAP_CODE_RESPONSE, id);
 204         if (msg == NULL)
 205                 return NULL;
 206
 207         wpabuf_put_u8(msg, 0x80); /* Mandatory */
 208         wpabuf_put_u8(msg, EAP_TLV_NAK_TLV);
 209         wpabuf_put_be16(msg, 6); /* Length */
 210         wpabuf_put_be32(msg, 0); /* Vendor-Id */
 211         wpabuf_put_be16(msg, nak_type); /* NAK-Type */
 212
 213         return msg;
 214 }
 215
 216
 217 static int eap_peap_get_isk(struct eap_sm *sm, struct eap_peap_data *data,
 218                             u8 *isk, size_t isk_len)
 219 {
 220         u8 *key;
 221         size_t key_len;
 222
 223         os_memset(isk, 0, isk_len);
 224         if (data->phase2_method == NULL || data->phase2_priv == NULL ||
 225             data->phase2_method->isKeyAvailable == NULL ||
 226             data->phase2_method->getKey == NULL)
 227                 return 0;
 228
 229         if (!data->phase2_method->isKeyAvailable(sm, data->phase2_priv) ||
 230             (key = data->phase2_method->getKey(sm, data->phase2_priv,
 231                                                &key_len)) == NULL) {
 232                 wpa_printf(MSG_DEBUG, "EAP-PEAP: Could not get key material "
 233                            "from Phase 2");
 234                 return -1;
 235         }
 236
 237         if (key_len > isk_len)
 238                 key_len = isk_len;
 239         os_memcpy(isk, key, key_len);
 240         os_free(key);
 241
 242         return 0;
 243 }
 244
 245
 246 static int eap_peap_derive_cmk(struct eap_sm *sm, struct eap_peap_data *data)
 247 {
 248         u8 *tk;
 249         u8 isk[32], imck[60];
 250
 251         /*
 252          * Tunnel key (TK) is the first 60 octets of the key generated by
 253          * phase 1 of PEAP (based on TLS).
 254          */
 255         tk = data->key_data;
 256         if (tk == NULL)
 257                 return -1;
 258         wpa_hexdump_key(MSG_DEBUG, "EAP-PEAP: TK", tk, 60);
 259
 260         if (data->reauth &&
 261             tls_connection_resumed(sm->ssl_ctx, data->ssl.conn)) {
 262                 /* Fast-connect: IPMK|CMK = TK */
 263                 os_memcpy(data->ipmk, tk, 40);
 264                 wpa_hexdump_key(MSG_DEBUG, "EAP-PEAP: IPMK from TK",
 265                                 data->ipmk, 40);
 266                 os_memcpy(data->cmk, tk + 40, 20);
 267                 wpa_hexdump_key(MSG_DEBUG, "EAP-PEAP: CMK from TK",
 268                                 data->cmk, 20);
 269                 return 0;
 270         }
 271
 272         if (eap_peap_get_isk(sm, data, isk, sizeof(isk)) < 0)
 273                 return -1;
 274         wpa_hexdump_key(MSG_DEBUG, "EAP-PEAP: ISK", isk, sizeof(isk));
 275
 276         /*
 277          * IPMK Seed = "Inner Methods Compound Keys" | ISK
 278          * TempKey = First 40 octets of TK
 279          * IPMK|CMK = PRF+(TempKey, IPMK Seed, 60)
 280          * (note: draft-josefsson-pppext-eap-tls-eap-10.txt includes a space
 281          * in the end of the label just before ISK; is that just a typo?)
 282          */
 283         wpa_hexdump_key(MSG_DEBUG, "EAP-PEAP: TempKey", tk, 40);
 284         if (peap_prfplus(data->peap_version, tk, 40,
 285                          "Inner Methods Compound Keys",
 286                          isk, sizeof(isk), imck, sizeof(imck)) < 0)
 287                 return -1;
 288         wpa_hexdump_key(MSG_DEBUG, "EAP-PEAP: IMCK (IPMKj)",
 289                         imck, sizeof(imck));
 290
 291         os_memcpy(data->ipmk, imck, 40);
 292         wpa_hexdump_key(MSG_DEBUG, "EAP-PEAP: IPMK (S-IPMKj)", data->ipmk, 40);
 293         os_memcpy(data->cmk, imck + 40, 20);
 294         wpa_hexdump_key(MSG_DEBUG, "EAP-PEAP: CMK (CMKj)", data->cmk, 20);
 295
 296         return 0;
 297 }
 298
 299
 300 static int eap_tlv_add_cryptobinding(struct eap_sm *sm,
 301                                      struct eap_peap_data *data,
 302                                      struct wpabuf *buf)
 303 {
 304         u8 *mac;
 305         u8 eap_type = EAP_TYPE_PEAP;
 306         const u8 *addr[2];
 307         size_t len[2];
 308         u16 tlv_type;
 309
 310         /* Compound_MAC: HMAC-SHA1-160(cryptobinding TLV | EAP type) */
 311         addr[0] = wpabuf_put(buf, 0);
 312         len[0] = 60;
 313         addr[1] = &eap_type;
 314         len[1] = 1;
 315
 316         tlv_type = EAP_TLV_CRYPTO_BINDING_TLV;
 317         wpabuf_put_be16(buf, tlv_type);
 318         wpabuf_put_be16(buf, 56);
 319
 320         wpabuf_put_u8(buf, 0); /* Reserved */
 321         wpabuf_put_u8(buf, data->peap_version); /* Version */
 322         wpabuf_put_u8(buf, data->peap_version); /* RecvVersion */
 323         wpabuf_put_u8(buf, 1); /* SubType: 0 = Request, 1 = Response */
 324         wpabuf_put_data(buf, data->binding_nonce, 32); /* Nonce */
 325         mac = wpabuf_put(buf, 20); /* Compound_MAC */
 326         wpa_hexdump(MSG_MSGDUMP, "EAP-PEAP: Compound_MAC CMK", data->cmk, 20);
 327         wpa_hexdump(MSG_MSGDUMP, "EAP-PEAP: Compound_MAC data 1",
 328                     addr[0], len[0]);
 329         wpa_hexdump(MSG_MSGDUMP, "EAP-PEAP: Compound_MAC data 2",
 330                     addr[1], len[1]);
 331         hmac_sha1_vector(data->cmk, 20, 2, addr, len, mac);
 332         wpa_hexdump(MSG_MSGDUMP, "EAP-PEAP: Compound_MAC", mac, SHA1_MAC_LEN);
 333         data->crypto_binding_used = 1;
 334
 335         return 0;
 336 }
 337
 338
 339 /**
 340  * eap_tlv_build_result - Build EAP-TLV Result message
 341  * @id: EAP identifier for the header
 342  * @status: Status (EAP_TLV_RESULT_SUCCESS or EAP_TLV_RESULT_FAILURE)
 343  * Returns: Buffer to the allocated EAP-TLV Result message or %NULL on failure
 344  *
 345  * This function builds an EAP-TLV Result message. The caller is responsible
 346  * for freeing the returned buffer.
 347  */
 348 static struct wpabuf * eap_tlv_build_result(struct eap_sm *sm,
 349                                             struct eap_peap_data *data,
 350                                             int crypto_tlv_used,
 351                                             int id, u16 status)
 352 {
 353         struct wpabuf *msg;
 354         size_t len;
 355
 356         if (data->crypto_binding == NO_BINDING)
 357                 crypto_tlv_used = 0;
 358
 359         len = 6;
 360         if (crypto_tlv_used)
 361                 len += 60; /* Cryptobinding TLV */
 362         msg = eap_msg_alloc(EAP_VENDOR_IETF, EAP_TYPE_TLV, len,
 363                             EAP_CODE_RESPONSE, id);
 364         if (msg == NULL)
 365                 return NULL;
 366
 367         wpabuf_put_u8(msg, 0x80); /* Mandatory */
 368         wpabuf_put_u8(msg, EAP_TLV_RESULT_TLV);
 369         wpabuf_put_be16(msg, 2); /* Length */
 370         wpabuf_put_be16(msg, status); /* Status */
 371
 372         if (crypto_tlv_used && eap_tlv_add_cryptobinding(sm, data, msg)) {
 373                 wpabuf_free(msg);
 374                 return NULL;
 375         }
 376
 377         return msg;
 378 }
 379
 380
 381 static int eap_tlv_validate_cryptobinding(struct eap_sm *sm,
 382                                           struct eap_peap_data *data,
 383                                           const u8 *crypto_tlv,
 384                                           size_t crypto_tlv_len)
 385 {
 386         u8 buf[61], mac[SHA1_MAC_LEN];
 387         const u8 *pos;
 388
 389         if (eap_peap_derive_cmk(sm, data) < 0) {
 390                 wpa_printf(MSG_DEBUG, "EAP-PEAP: Could not derive CMK");
 391                 return -1;
 392         }
 393
 394         if (crypto_tlv_len != 4 + 56) {
 395                 wpa_printf(MSG_DEBUG, "EAP-PEAP: Invalid cryptobinding TLV "
 396                            "length %d", (int) crypto_tlv_len);
 397                 return -1;
 398         }
 399
 400         pos = crypto_tlv;
 401         pos += 4; /* TLV header */
 402         if (pos[1] != data->peap_version) {
 403                 wpa_printf(MSG_DEBUG, "EAP-PEAP: Cryptobinding TLV Version "
 404                            "mismatch (was %d; expected %d)",
 405                            pos[1], data->peap_version);
 406                 return -1;
 407         }
 408
 409         if (pos[3] != 0) {
 410                 wpa_printf(MSG_DEBUG, "EAP-PEAP: Unexpected Cryptobinding TLV "
 411                            "SubType %d", pos[3]);
 412                 return -1;
 413         }
 414         pos += 4;
 415         os_memcpy(data->binding_nonce, pos, 32);
 416         pos += 32; /* Nonce */
 417
 418         /* Compound_MAC: HMAC-SHA1-160(cryptobinding TLV | EAP type) */
 419         os_memcpy(buf, crypto_tlv, 60);
 420         os_memset(buf + 4 + 4 + 32, 0, 20); /* Compound_MAC */
 421         buf[60] = EAP_TYPE_PEAP;
 422         wpa_hexdump(MSG_DEBUG, "EAP-PEAP: Compound_MAC data",
 423                     buf, sizeof(buf));
 424         hmac_sha1(data->cmk, 20, buf, sizeof(buf), mac);
 425
 426         if (os_memcmp(mac, pos, SHA1_MAC_LEN) != 0) {
 427                 wpa_printf(MSG_DEBUG, "EAP-PEAP: Invalid Compound_MAC in "
 428                            "cryptobinding TLV");
 429                 wpa_hexdump(MSG_DEBUG, "EAP-PEAP: Received MAC",
 430                             pos, SHA1_MAC_LEN);
 431                 wpa_hexdump(MSG_DEBUG, "EAP-PEAP: Expected MAC",
 432                             mac, SHA1_MAC_LEN);
 433                 return -1;
 434         }
 435
 436         wpa_printf(MSG_DEBUG, "EAP-PEAP: Valid cryptobinding TLV received");
 437
 438         return 0;
 439 }
 440
 441
 442 /**
 443  * eap_tlv_process - Process a received EAP-TLV message and generate a response
 444  * @sm: Pointer to EAP state machine allocated with eap_peer_sm_init()
 445  * @ret: Return values from EAP request validation and processing
 446  * @req: EAP-TLV request to be processed. The caller must have validated that
 447  * the buffer is large enough to contain full request (hdr->length bytes) and
 448  * that the EAP type is EAP_TYPE_TLV.
 449  * @resp: Buffer to return a pointer to the allocated response message. This
 450  * field should be initialized to %NULL before the call. The value will be
 451  * updated if a response message is generated. The caller is responsible for
 452  * freeing the allocated message.
 453  * @force_failure: Force negotiation to fail
 454  * Returns: 0 on success, -1 on failure
 455  */
 456 static int eap_tlv_process(struct eap_sm *sm, struct eap_peap_data *data,
 457                            struct eap_method_ret *ret,
 458                            const struct wpabuf *req, struct wpabuf **resp,
 459                            int force_failure)
 460 {
 461         size_t left, tlv_len;
 462         const u8 *pos;
 463         const u8 *result_tlv = NULL, *crypto_tlv = NULL;
 464         size_t result_tlv_len = 0, crypto_tlv_len = 0;
 465         int tlv_type, mandatory;
 466
 467         /* Parse TLVs */
 468         pos = eap_hdr_validate(EAP_VENDOR_IETF, EAP_TYPE_TLV, req, &left);
 469         if (pos == NULL)
 470                 return -1;
 471         wpa_hexdump(MSG_DEBUG, "EAP-TLV: Received TLVs", pos, left);
 472         while (left >= 4) {
 473                 mandatory = !!(pos[0] & 0x80);
 474                 tlv_type = WPA_GET_BE16(pos) & 0x3fff;
 475                 pos += 2;
 476                 tlv_len = WPA_GET_BE16(pos);
 477                 pos += 2;
 478                 left -= 4;
 479                 if (tlv_len > left) {
 480                         wpa_printf(MSG_DEBUG, "EAP-TLV: TLV underrun "
 481                                    "(tlv_len=%lu left=%lu)",
 482                                    (unsigned long) tlv_len,
 483                                    (unsigned long) left);
 484                         return -1;
 485                 }
 486                 switch (tlv_type) {
 487                 case EAP_TLV_RESULT_TLV:
 488                         result_tlv = pos;
 489                         result_tlv_len = tlv_len;
 490                         break;
 491                 case EAP_TLV_CRYPTO_BINDING_TLV:
 492                         crypto_tlv = pos;
 493                         crypto_tlv_len = tlv_len;
 494                         break;
 495                 default:
 496                         wpa_printf(MSG_DEBUG, "EAP-TLV: Unsupported TLV Type "
 497                                    "%d%s", tlv_type,
 498                                    mandatory ? " (mandatory)" : "");
 499                         if (mandatory) {
 500                                 /* NAK TLV and ignore all TLVs in this packet.
 501                                  */
 502                                 *resp = eap_tlv_build_nak(eap_get_id(req),
 503                                                           tlv_type);
 504                                 return *resp == NULL ? -1 : 0;
 505                         }
 506                         /* Ignore this TLV, but process other TLVs */
 507                         break;
 508                 }
 509
 510                 pos += tlv_len;
 511                 left -= tlv_len;
 512         }
 513         if (left) {
 514                 wpa_printf(MSG_DEBUG, "EAP-TLV: Last TLV too short in "
 515                            "Request (left=%lu)", (unsigned long) left);
 516                 return -1;
 517         }
 518
 519         /* Process supported TLVs */
 520         if (crypto_tlv && data->crypto_binding != NO_BINDING) {
 521                 wpa_hexdump(MSG_DEBUG, "EAP-PEAP: Cryptobinding TLV",
 522                             crypto_tlv, crypto_tlv_len);
 523                 if (eap_tlv_validate_cryptobinding(sm, data, crypto_tlv - 4,
 524                                                    crypto_tlv_len + 4) < 0) {
 525                         if (result_tlv == NULL)
 526                                 return -1;
 527                         force_failure = 1;
 528                         crypto_tlv = NULL; /* do not include Cryptobinding TLV
 529                                             * in response, if the received
 530                                             * cryptobinding was invalid. */
 531                 }
 532         } else if (!crypto_tlv && data->crypto_binding == REQUIRE_BINDING) {
 533                 wpa_printf(MSG_DEBUG, "EAP-PEAP: No cryptobinding TLV");
 534                 return -1;
 535         }
 536
 537         if (result_tlv) {
 538                 int status, resp_status;
 539                 wpa_hexdump(MSG_DEBUG, "EAP-TLV: Result TLV",
 540                             result_tlv, result_tlv_len);
 541                 if (result_tlv_len < 2) {
 542                         wpa_printf(MSG_INFO, "EAP-TLV: Too short Result TLV "
 543                                    "(len=%lu)",
 544                                    (unsigned long) result_tlv_len);
 545                         return -1;
 546                 }
 547                 status = WPA_GET_BE16(result_tlv);
 548                 if (status == EAP_TLV_RESULT_SUCCESS) {
 549                         wpa_printf(MSG_INFO, "EAP-TLV: TLV Result - Success "
 550                                    "- EAP-TLV/Phase2 Completed");
 551                         if (force_failure) {
 552                                 wpa_printf(MSG_INFO, "EAP-TLV: Earlier failure"
 553                                            " - force failed Phase 2");
 554                                 resp_status = EAP_TLV_RESULT_FAILURE;
 555                                 ret->decision = DECISION_FAIL;
 556                         } else {
 557                                 resp_status = EAP_TLV_RESULT_SUCCESS;
 558                                 ret->decision = DECISION_UNCOND_SUCC;
 559                         }
 560                 } else if (status == EAP_TLV_RESULT_FAILURE) {
 561                         wpa_printf(MSG_INFO, "EAP-TLV: TLV Result - Failure");
 562                         resp_status = EAP_TLV_RESULT_FAILURE;
 563                         ret->decision = DECISION_FAIL;
 564                 } else {
 565                         wpa_printf(MSG_INFO, "EAP-TLV: Unknown TLV Result "
 566                                    "Status %d", status);
 567                         resp_status = EAP_TLV_RESULT_FAILURE;
 568                         ret->decision = DECISION_FAIL;
 569                 }
 570                 ret->methodState = METHOD_DONE;
 571
 572                 *resp = eap_tlv_build_result(sm, data, crypto_tlv != NULL,
 573                                              eap_get_id(req), resp_status);
 574         }
 575
 576         return 0;
 577 }
 578
 579
 580 static int eap_peap_phase2_request(struct eap_sm *sm,
 581                                    struct eap_peap_data *data,
 582                                    struct eap_method_ret *ret,
 583                                    struct wpabuf *req,
 584                                    struct wpabuf **resp)
 585 {
 586         struct eap_hdr *hdr = wpabuf_mhead(req);
 587         size_t len = be_to_host16(hdr->length);
 588         u8 *pos;
 589         struct eap_method_ret iret;
 590         struct eap_peer_config *config = eap_get_config(sm);
 591
 592         if (len <= sizeof(struct eap_hdr)) {
 593                 wpa_printf(MSG_INFO, "EAP-PEAP: too short "
 594                            "Phase 2 request (len=%lu)", (unsigned long) len);
 595                 return -1;
 596         }
 597         pos = (u8 *) (hdr + 1);
 598         wpa_printf(MSG_DEBUG, "EAP-PEAP: Phase 2 Request: type=%d", *pos);
 599         switch (*pos) {
 600         case EAP_TYPE_IDENTITY:
 601                 *resp = eap_sm_buildIdentity(sm, hdr->identifier, 1);
 602                 break;
 603         case EAP_TYPE_TLV:
 604                 os_memset(&iret, 0, sizeof(iret));
 605                 if (eap_tlv_process(sm, data, &iret, req, resp,
 606                                     data->phase2_eap_started &&
 607                                     !data->phase2_eap_success)) {
 608                         ret->methodState = METHOD_DONE;
 609                         ret->decision = DECISION_FAIL;
 610                         return -1;
 611                 }
 612                 if (iret.methodState == METHOD_DONE ||
 613                     iret.methodState == METHOD_MAY_CONT) {
 614                         ret->methodState = iret.methodState;
 615                         ret->decision = iret.decision;
 616                         data->phase2_success = 1;
 617                 }
 618                 break;
 619         case EAP_TYPE_EXPANDED:
 620 #ifdef EAP_TNC
 621                 if (data->soh) {
 622                         const u8 *epos;
 623                         size_t eleft;
 624
 625                         epos = eap_hdr_validate(EAP_VENDOR_MICROSOFT, 0x21,
 626                                                 req, &eleft);
 627                         if (epos) {
 628                                 struct wpabuf *buf;
 629                                 wpa_printf(MSG_DEBUG,
 630                                            "EAP-PEAP: SoH EAP Extensions");
 631                                 buf = tncc_process_soh_request(data->soh,
 632                                                                epos, eleft);
 633                                 if (buf) {
 634                                         *resp = eap_msg_alloc(
 635                                                 EAP_VENDOR_MICROSOFT, 0x21,
 636                                                 wpabuf_len(buf),
 637                                                 EAP_CODE_RESPONSE,
 638                                                 hdr->identifier);
 639                                         if (*resp == NULL) {
 640                                                 ret->methodState = METHOD_DONE;
 641                                                 ret->decision = DECISION_FAIL;
 642                                                 return -1;
 643                                         }
 644                                         wpabuf_put_buf(*resp, buf);
 645                                         wpabuf_free(buf);
 646                                         break;
 647                                 }
 648                         }
 649                 }
 650 #endif /* EAP_TNC */
 651                 /* fall through */
 652         default:
 653                 if (data->phase2_type.vendor == EAP_VENDOR_IETF &&
 654                     data->phase2_type.method == EAP_TYPE_NONE) {
 655                         size_t i;
 656                         for (i = 0; i < data->num_phase2_types; i++) {
 657                                 if (data->phase2_types[i].vendor !=
 658                                     EAP_VENDOR_IETF ||
 659                                     data->phase2_types[i].method != *pos)
 660                                         continue;
 661
 662                                 data->phase2_type.vendor =
 663                                         data->phase2_types[i].vendor;
 664                                 data->phase2_type.method =
 665                                         data->phase2_types[i].method;
 666                                 wpa_printf(MSG_DEBUG, "EAP-PEAP: Selected "
 667                                            "Phase 2 EAP vendor %d method %d",
 668                                            data->phase2_type.vendor,
 669                                            data->phase2_type.method);
 670                                 break;
 671                         }
 672                 }
 673                 if (*pos != data->phase2_type.method ||
 674                     *pos == EAP_TYPE_NONE) {
 675                         if (eap_peer_tls_phase2_nak(data->phase2_types,
 676                                                     data->num_phase2_types,
 677                                                     hdr, resp))
 678                                 return -1;
 679                         return 0;
 680                 }
 681
 682                 if (data->phase2_priv == NULL) {
 683                         data->phase2_method = eap_peer_get_eap_method(
 684                                 data->phase2_type.vendor,
 685                                 data->phase2_type.method);
 686                         if (data->phase2_method) {
 687                                 sm->init_phase2 = 1;
 688                                 data->phase2_priv =
 689                                         data->phase2_method->init(sm);
 690                                 sm->init_phase2 = 0;
 691                         }
 692                 }
 693                 if (data->phase2_priv == NULL || data->phase2_method == NULL) {
 694                         wpa_printf(MSG_INFO, "EAP-PEAP: failed to initialize "
 695                                    "Phase 2 EAP method %d", *pos);
 696                         ret->methodState = METHOD_DONE;
 697                         ret->decision = DECISION_FAIL;
 698                         return -1;
 699                 }
 700                 data->phase2_eap_started = 1;
 701                 os_memset(&iret, 0, sizeof(iret));
 702                 *resp = data->phase2_method->process(sm, data->phase2_priv,
 703                                                      &iret, req);
 704                 if ((iret.methodState == METHOD_DONE ||
 705                      iret.methodState == METHOD_MAY_CONT) &&
 706                     (iret.decision == DECISION_UNCOND_SUCC ||
 707                      iret.decision == DECISION_COND_SUCC)) {
 708                         data->phase2_eap_success = 1;
 709                         data->phase2_success = 1;
 710                 }
 711                 break;
 712         }
 713
 714         if (*resp == NULL &&
 715             (config->pending_req_identity || config->pending_req_password ||
 716              config->pending_req_otp || config->pending_req_new_password)) {
 717                 wpabuf_free(data->pending_phase2_req);
 718                 data->pending_phase2_req = wpabuf_alloc_copy(hdr, len);
 719         }
 720
 721         return 0;
 722 }
 723
 724
 725 static int eap_peap_decrypt(struct eap_sm *sm, struct eap_peap_data *data,
 726                             struct eap_method_ret *ret,
 727                             const struct eap_hdr *req,
 728                             const struct wpabuf *in_data,
 729                             struct wpabuf **out_data)
 730 {
 731         struct wpabuf *in_decrypted = NULL;
 732         int res, skip_change = 0;
 733         struct eap_hdr *hdr, *rhdr;
 734         struct wpabuf *resp = NULL;
 735         size_t len;
 736
 737         wpa_printf(MSG_DEBUG, "EAP-PEAP: received %lu bytes encrypted data for"
 738                    " Phase 2", (unsigned long) wpabuf_len(in_data));
 739
 740         if (data->pending_phase2_req) {
 741                 wpa_printf(MSG_DEBUG, "EAP-PEAP: Pending Phase 2 request - "
 742                            "skip decryption and use old data");
 743                 /* Clear TLS reassembly state. */
 744                 eap_peer_tls_reset_input(&data->ssl);
 745                 in_decrypted = data->pending_phase2_req;
 746                 data->pending_phase2_req = NULL;
 747                 skip_change = 1;
 748                 goto continue_req;
 749         }
 750
 751         if (wpabuf_len(in_data) == 0 && sm->workaround &&
 752             data->phase2_success) {
 753                 /*
 754                  * Cisco ACS seems to be using TLS ACK to terminate
 755                  * EAP-PEAPv0/GTC. Try to reply with TLS ACK.
 756                  */
 757                 wpa_printf(MSG_DEBUG, "EAP-PEAP: Received TLS ACK, but "
 758                            "expected data - acknowledge with TLS ACK since "
 759                            "Phase 2 has been completed");
 760                 ret->decision = DECISION_COND_SUCC;
 761                 ret->methodState = METHOD_DONE;
 762                 return 1;
 763         } else if (wpabuf_len(in_data) == 0) {
 764                 /* Received TLS ACK - requesting more fragments */
 765                 return eap_peer_tls_encrypt(sm, &data->ssl, EAP_TYPE_PEAP,
 766                                             data->peap_version,
 767                                             req->identifier, NULL, out_data);
 768         }
 769
 770         res = eap_peer_tls_decrypt(sm, &data->ssl, in_data, &in_decrypted);
 771         if (res)
 772                 return res;
 773
 774 continue_req:
 775         wpa_hexdump_buf(MSG_DEBUG, "EAP-PEAP: Decrypted Phase 2 EAP",
 776                         in_decrypted);
 777
 778         hdr = wpabuf_mhead(in_decrypted);
 779         if (wpabuf_len(in_decrypted) == 5 && hdr->code == EAP_CODE_REQUEST &&
 780             be_to_host16(hdr->length) == 5 &&
 781             eap_get_type(in_decrypted) == EAP_TYPE_IDENTITY) {
 782                 /* At least FreeRADIUS seems to send full EAP header with
 783                  * EAP Request Identity */
 784                 skip_change = 1;
 785         }
 786         if (wpabuf_len(in_decrypted) >= 5 && hdr->code == EAP_CODE_REQUEST &&
 787             eap_get_type(in_decrypted) == EAP_TYPE_TLV) {
 788                 skip_change = 1;
 789         }
 790
 791         if (data->peap_version == 0 && !skip_change) {
 792                 struct eap_hdr *nhdr;
 793                 struct wpabuf *nmsg = wpabuf_alloc(sizeof(struct eap_hdr) +
 794                                                    wpabuf_len(in_decrypted));
 795                 if (nmsg == NULL) {
 796                         wpabuf_free(in_decrypted);
 797                         return 0;
 798                 }
 799                 nhdr = wpabuf_put(nmsg, sizeof(*nhdr));
 800                 wpabuf_put_buf(nmsg, in_decrypted);
 801                 nhdr->code = req->code;
 802                 nhdr->identifier = req->identifier;
 803                 nhdr->length = host_to_be16(sizeof(struct eap_hdr) +
 804                                             wpabuf_len(in_decrypted));
 805
 806                 wpabuf_free(in_decrypted);
 807                 in_decrypted = nmsg;
 808         }
 809
 810         hdr = wpabuf_mhead(in_decrypted);
 811         if (wpabuf_len(in_decrypted) < sizeof(*hdr)) {
 812                 wpa_printf(MSG_INFO, "EAP-PEAP: Too short Phase 2 "
 813                            "EAP frame (len=%lu)",
 814                            (unsigned long) wpabuf_len(in_decrypted));
 815                 wpabuf_free(in_decrypted);
 816                 return 0;
 817         }
 818         len = be_to_host16(hdr->length);
 819         if (len > wpabuf_len(in_decrypted)) {
 820                 wpa_printf(MSG_INFO, "EAP-PEAP: Length mismatch in "
 821                            "Phase 2 EAP frame (len=%lu hdr->length=%lu)",
 822                            (unsigned long) wpabuf_len(in_decrypted),
 823                            (unsigned long) len);
 824                 wpabuf_free(in_decrypted);
 825                 return 0;
 826         }
 827         if (len < wpabuf_len(in_decrypted)) {
 828                 wpa_printf(MSG_INFO, "EAP-PEAP: Odd.. Phase 2 EAP header has "
 829                            "shorter length than full decrypted data "
 830                            "(%lu < %lu)",
 831                            (unsigned long) len,
 832                            (unsigned long) wpabuf_len(in_decrypted));
 833         }
 834         wpa_printf(MSG_DEBUG, "EAP-PEAP: received Phase 2: code=%d "
 835                    "identifier=%d length=%lu", hdr->code, hdr->identifier,
 836                    (unsigned long) len);
 837         switch (hdr->code) {
 838         case EAP_CODE_REQUEST:
 839                 if (eap_peap_phase2_request(sm, data, ret, in_decrypted,
 840                                             &resp)) {
 841                         wpabuf_free(in_decrypted);
 842                         wpa_printf(MSG_INFO, "EAP-PEAP: Phase2 Request "
 843                                    "processing failed");
 844                         return 0;
 845                 }
 846                 break;
 847         case EAP_CODE_SUCCESS:
 848                 wpa_printf(MSG_DEBUG, "EAP-PEAP: Phase 2 Success");
 849                 if (data->peap_version == 1) {
 850                         /* EAP-Success within TLS tunnel is used to indicate
 851                          * shutdown of the TLS channel. The authentication has
 852                          * been completed. */
 853                         if (data->phase2_eap_started &&
 854                             !data->phase2_eap_success) {
 855                                 wpa_printf(MSG_DEBUG, "EAP-PEAP: Phase 2 "
 856                                            "Success used to indicate success, "
 857                                            "but Phase 2 EAP was not yet "
 858                                            "completed successfully");
 859                                 ret->methodState = METHOD_DONE;
 860                                 ret->decision = DECISION_FAIL;
 861                                 wpabuf_free(in_decrypted);
 862                                 return 0;
 863                         }
 864                         wpa_printf(MSG_DEBUG, "EAP-PEAP: Version 1 - "
 865                                    "EAP-Success within TLS tunnel - "
 866                                    "authentication completed");
 867                         ret->decision = DECISION_UNCOND_SUCC;
 868                         ret->methodState = METHOD_DONE;
 869                         data->phase2_success = 1;
 870                         if (data->peap_outer_success == 2) {
 871                                 wpabuf_free(in_decrypted);
 872                                 wpa_printf(MSG_DEBUG, "EAP-PEAP: Use TLS ACK "
 873                                            "to finish authentication");
 874                                 return 1;
 875                         } else if (data->peap_outer_success == 1) {
 876                                 /* Reply with EAP-Success within the TLS
 877                                  * channel to complete the authentication. */
 878                                 resp = wpabuf_alloc(sizeof(struct eap_hdr));
 879                                 if (resp) {
 880                                         rhdr = wpabuf_put(resp, sizeof(*rhdr));
 881                                         rhdr->code = EAP_CODE_SUCCESS;
 882                                         rhdr->identifier = hdr->identifier;
 883                                         rhdr->length =
 884                                                 host_to_be16(sizeof(*rhdr));
 885                                 }
 886                         } else {
 887                                 /* No EAP-Success expected for Phase 1 (outer,
 888                                  * unencrypted auth), so force EAP state
 889                                  * machine to SUCCESS state. */
 890                                 sm->peap_done = TRUE;
 891                         }
 892                 } else {
 893                         /* FIX: ? */
 894                 }
 895                 break;
 896         case EAP_CODE_FAILURE:
 897                 wpa_printf(MSG_DEBUG, "EAP-PEAP: Phase 2 Failure");
 898                 ret->decision = DECISION_FAIL;
 899                 ret->methodState = METHOD_MAY_CONT;
 900                 ret->allowNotifications = FALSE;
 901                 /* Reply with EAP-Failure within the TLS channel to complete
 902                  * failure reporting. */
 903                 resp = wpabuf_alloc(sizeof(struct eap_hdr));
 904                 if (resp) {
 905                         rhdr = wpabuf_put(resp, sizeof(*rhdr));
 906                         rhdr->code = EAP_CODE_FAILURE;
 907                         rhdr->identifier = hdr->identifier;
 908                         rhdr->length = host_to_be16(sizeof(*rhdr));
 909                 }
 910                 break;
 911         default:
 912                 wpa_printf(MSG_INFO, "EAP-PEAP: Unexpected code=%d in "
 913                            "Phase 2 EAP header", hdr->code);
 914                 break;
 915         }
 916
 917         wpabuf_free(in_decrypted);
 918
 919         if (resp) {
 920                 int skip_change2 = 0;
 921                 struct wpabuf *rmsg, buf;
 922
 923                 wpa_hexdump_buf_key(MSG_DEBUG,
 924                                     "EAP-PEAP: Encrypting Phase 2 data", resp);
 925                 /* PEAP version changes */
 926                 if (wpabuf_len(resp) >= 5 &&
 927                     wpabuf_head_u8(resp)[0] == EAP_CODE_RESPONSE &&
 928                     eap_get_type(resp) == EAP_TYPE_TLV)
 929                         skip_change2 = 1;
 930                 rmsg = resp;
 931                 if (data->peap_version == 0 && !skip_change2) {
 932                         wpabuf_set(&buf, wpabuf_head_u8(resp) +
 933                                    sizeof(struct eap_hdr),
 934                                    wpabuf_len(resp) - sizeof(struct eap_hdr));
 935                         rmsg = &buf;
 936                 }
 937
 938                 if (eap_peer_tls_encrypt(sm, &data->ssl, EAP_TYPE_PEAP,
 939                                          data->peap_version, req->identifier,
 940                                          rmsg, out_data)) {
 941                         wpa_printf(MSG_INFO, "EAP-PEAP: Failed to encrypt "
 942                                    "a Phase 2 frame");
 943                 }
 944                 wpabuf_free(resp);
 945         }
 946
 947         return 0;
 948 }
 949
 950
 951 static struct wpabuf * eap_peap_process(struct eap_sm *sm, void *priv,
 952                                         struct eap_method_ret *ret,
 953                                         const struct wpabuf *reqData)
 954 {
 955         const struct eap_hdr *req;
 956         size_t left;
 957         int res;
 958         u8 flags, id;
 959         struct wpabuf *resp;
 960         const u8 *pos;
 961         struct eap_peap_data *data = priv;
 962
 963         pos = eap_peer_tls_process_init(sm, &data->ssl, EAP_TYPE_PEAP, ret,
 964                                         reqData, &left, &flags);
 965         if (pos == NULL)
 966                 return NULL;
 967         req = wpabuf_head(reqData);
 968         id = req->identifier;
 969
 970         if (flags & EAP_TLS_FLAGS_START) {
 971                 wpa_printf(MSG_DEBUG, "EAP-PEAP: Start (server ver=%d, own "
 972                            "ver=%d)", flags & EAP_TLS_VERSION_MASK,
 973                         data->peap_version);
 974                 if ((flags & EAP_TLS_VERSION_MASK) < data->peap_version)
 975                         data->peap_version = flags & EAP_TLS_VERSION_MASK;
 976                 if (data->force_peap_version >= 0 &&
 977                     data->force_peap_version != data->peap_version) {
 978                         wpa_printf(MSG_WARNING, "EAP-PEAP: Failed to select "
 979                                    "forced PEAP version %d",
 980                                    data->force_peap_version);
 981                         ret->methodState = METHOD_DONE;
 982                         ret->decision = DECISION_FAIL;
 983                         ret->allowNotifications = FALSE;
 984                         return NULL;
 985                 }
 986                 wpa_printf(MSG_DEBUG, "EAP-PEAP: Using PEAP version %d",
 987                            data->peap_version);
 988                 left = 0; /* make sure that this frame is empty, even though it
 989                            * should always be, anyway */
 990         }
 991
 992         resp = NULL;
 993         if (tls_connection_established(sm->ssl_ctx, data->ssl.conn) &&
 994             !data->resuming) {
 995                 struct wpabuf msg;
 996                 wpabuf_set(&msg, pos, left);
 997                 res = eap_peap_decrypt(sm, data, ret, req, &msg, &resp);
 998         } else {
 999                 res = eap_peer_tls_process_helper(sm, &data->ssl,
1000                                                   EAP_TYPE_PEAP,
1001                                                   data->peap_version, id, pos,
1002                                                   left, &resp);
1003
1004                 if (tls_connection_established(sm->ssl_ctx, data->ssl.conn)) {
1005                         char *label;
1006                         wpa_printf(MSG_DEBUG,
1007                                    "EAP-PEAP: TLS done, proceed to Phase 2");
1008                         os_free(data->key_data);
1009                         /* draft-josefsson-ppext-eap-tls-eap-05.txt
1010                          * specifies that PEAPv1 would use "client PEAP
1011                          * encryption" as the label. However, most existing
1012                          * PEAPv1 implementations seem to be using the old
1013                          * label, "client EAP encryption", instead. Use the old
1014                          * label by default, but allow it to be configured with
1015                          * phase1 parameter peaplabel=1. */
1016                         if (data->force_new_label)
1017                                 label = "client PEAP encryption";
1018                         else
1019                                 label = "client EAP encryption";
1020                         wpa_printf(MSG_DEBUG, "EAP-PEAP: using label '%s' in "
1021                                    "key derivation", label);
1022                         data->key_data =
1023                                 eap_peer_tls_derive_key(sm, &data->ssl, label,
1024                                                         EAP_TLS_KEY_LEN);
1025                         if (data->key_data) {
1026                                 wpa_hexdump_key(MSG_DEBUG,
1027                                                 "EAP-PEAP: Derived key",
1028                                                 data->key_data,
1029                                                 EAP_TLS_KEY_LEN);
1030                         } else {
1031                                 wpa_printf(MSG_DEBUG, "EAP-PEAP: Failed to "
1032                                            "derive key");
1033                         }
1034
1035                         os_free(data->session_id);
1036                         data->session_id =
1037                                 eap_peer_tls_derive_session_id(sm, &data->ssl,
1038                                                                EAP_TYPE_PEAP,
1039                                                                &data->id_len);
1040                         if (data->session_id) {
1041                                 wpa_hexdump(MSG_DEBUG,
1042                                             "EAP-PEAP: Derived Session-Id",
1043                                             data->session_id, data->id_len);
1044                         } else {
1045                                 wpa_printf(MSG_ERROR, "EAP-PEAP: Failed to "
1046                                            "derive Session-Id");
1047                         }
1048
1049                         if (sm->workaround && data->resuming) {
1050                                 /*
1051                                  * At least few RADIUS servers (Aegis v1.1.6;
1052                                  * but not v1.1.4; and Cisco ACS) seem to be
1053                                  * terminating PEAPv1 (Aegis) or PEAPv0 (Cisco
1054                                  * ACS) session resumption with outer
1055                                  * EAP-Success. This does not seem to follow
1056                                  * draft-josefsson-pppext-eap-tls-eap-05.txt
1057                                  * section 4.2, so only allow this if EAP
1058                                  * workarounds are enabled.
1059                                  */
1060                                 wpa_printf(MSG_DEBUG, "EAP-PEAP: Workaround - "
1061                                            "allow outer EAP-Success to "
1062                                            "terminate PEAP resumption");
1063                                 ret->decision = DECISION_COND_SUCC;
1064                                 data->phase2_success = 1;
1065                         }
1066
1067                         data->resuming = 0;
1068                 }
1069
1070                 if (res == 2) {
1071                         struct wpabuf msg;
1072                         /*
1073                          * Application data included in the handshake message.
1074                          */
1075                         wpabuf_free(data->pending_phase2_req);
1076                         data->pending_phase2_req = resp;
1077                         resp = NULL;
1078                         wpabuf_set(&msg, pos, left);
1079                         res = eap_peap_decrypt(sm, data, ret, req, &msg,
1080                                                &resp);
1081                 }
1082         }
1083
1084         if (ret->methodState == METHOD_DONE) {
1085                 ret->allowNotifications = FALSE;
1086         }
1087
1088         if (res == 1) {
1089                 wpabuf_free(resp);
1090                 return eap_peer_tls_build_ack(id, EAP_TYPE_PEAP,
1091                                               data->peap_version);
1092         }
1093
1094         return resp;
1095 }
1096
1097
1098 static Boolean eap_peap_has_reauth_data(struct eap_sm *sm, void *priv)
1099 {
1100         struct eap_peap_data *data = priv;
1101         return tls_connection_established(sm->ssl_ctx, data->ssl.conn) &&
1102                 data->phase2_success;
1103 }
1104
1105
1106 static void eap_peap_deinit_for_reauth(struct eap_sm *sm, void *priv)
1107 {
1108         struct eap_peap_data *data = priv;
1109         wpabuf_free(data->pending_phase2_req);
1110         data->pending_phase2_req = NULL;
1111         data->crypto_binding_used = 0;
1112 }
1113
1114
1115 static void * eap_peap_init_for_reauth(struct eap_sm *sm, void *priv)
1116 {
1117         struct eap_peap_data *data = priv;
1118         os_free(data->key_data);
1119         data->key_data = NULL;
1120         os_free(data->session_id);
1121         data->session_id = NULL;
1122         if (eap_peer_tls_reauth_init(sm, &data->ssl)) {
1123                 os_free(data);
1124                 return NULL;
1125         }
1126         if (data->phase2_priv && data->phase2_method &&
1127             data->phase2_method->init_for_reauth)
1128                 data->phase2_method->init_for_reauth(sm, data->phase2_priv);
1129         data->phase2_success = 0;
1130         data->phase2_eap_success = 0;
1131         data->phase2_eap_started = 0;
1132         data->resuming = 1;
1133         data->reauth = 1;
1134         sm->peap_done = FALSE;
1135         return priv;
1136 }
1137
1138
1139 static int eap_peap_get_status(struct eap_sm *sm, void *priv, char *buf,
1140                                size_t buflen, int verbose)
1141 {
1142         struct eap_peap_data *data = priv;
1143         int len, ret;
1144
1145         len = eap_peer_tls_status(sm, &data->ssl, buf, buflen, verbose);
1146         if (data->phase2_method) {
1147                 ret = os_snprintf(buf + len, buflen - len,
1148                                   "EAP-PEAPv%d Phase2 method=%s\n",
1149                                   data->peap_version,
1150                                   data->phase2_method->name);
1151                 if (ret < 0 || (size_t) ret >= buflen - len)
1152                         return len;
1153                 len += ret;
1154         }
1155         return len;
1156 }
1157
1158
1159 static Boolean eap_peap_isKeyAvailable(struct eap_sm *sm, void *priv)
1160 {
1161         struct eap_peap_data *data = priv;
1162         return data->key_data != NULL && data->phase2_success;
1163 }
1164
1165
1166 static u8 * eap_peap_getKey(struct eap_sm *sm, void *priv, size_t *len)
1167 {
1168         struct eap_peap_data *data = priv;
1169         u8 *key;
1170
1171         if (data->key_data == NULL || !data->phase2_success)
1172                 return NULL;
1173
1174         key = os_malloc(EAP_TLS_KEY_LEN);
1175         if (key == NULL)
1176                 return NULL;
1177
1178         *len = EAP_TLS_KEY_LEN;
1179
1180         if (data->crypto_binding_used) {
1181                 u8 csk[128];
1182                 /*
1183                  * Note: It looks like Microsoft implementation requires null
1184                  * termination for this label while the one used for deriving
1185                  * IPMK|CMK did not use null termination.
1186                  */
1187                 if (peap_prfplus(data->peap_version, data->ipmk, 40,
1188                                  "Session Key Generating Function",
1189                                  (u8 *) "\00", 1, csk, sizeof(csk)) < 0) {
1190                         os_free(key);
1191                         return NULL;
1192                 }
1193                 wpa_hexdump_key(MSG_DEBUG, "EAP-PEAP: CSK", csk, sizeof(csk));
1194                 os_memcpy(key, csk, EAP_TLS_KEY_LEN);
1195                 wpa_hexdump(MSG_DEBUG, "EAP-PEAP: Derived key",
1196                             key, EAP_TLS_KEY_LEN);
1197         } else
1198                 os_memcpy(key, data->key_data, EAP_TLS_KEY_LEN);
1199
1200         return key;
1201 }
1202
1203
1204 static u8 * eap_peap_get_session_id(struct eap_sm *sm, void *priv, size_t *len)
1205 {
1206         struct eap_peap_data *data = priv;
1207         u8 *id;
1208
1209         if (data->session_id == NULL || !data->phase2_success)
1210                 return NULL;
1211
1212         id = os_malloc(data->id_len);
1213         if (id == NULL)
1214                 return NULL;
1215
1216         *len = data->id_len;
1217         os_memcpy(id, data->session_id, data->id_len);
1218
1219         return id;
1220 }
1221
1222
1223 int eap_peer_peap_register(void)
1224 {
1225         struct eap_method *eap;
1226         int ret;
1227
1228         eap = eap_peer_method_alloc(EAP_PEER_METHOD_INTERFACE_VERSION,
1229                                     EAP_VENDOR_IETF, EAP_TYPE_PEAP, "PEAP");
1230         if (eap == NULL)
1231                 return -1;
1232
1233         eap->init = eap_peap_init;
1234         eap->deinit = eap_peap_deinit;
1235         eap->process = eap_peap_process;
1236         eap->isKeyAvailable = eap_peap_isKeyAvailable;
1237         eap->getKey = eap_peap_getKey;
1238         eap->get_status = eap_peap_get_status;
1239         eap->has_reauth_data = eap_peap_has_reauth_data;
1240         eap->deinit_for_reauth = eap_peap_deinit_for_reauth;
1241         eap->init_for_reauth = eap_peap_init_for_reauth;
1242         eap->getSessionId = eap_peap_get_session_id;
1243
1244         ret = eap_peer_method_register(eap);
1245         if (ret)
1246                 eap_peer_method_free(eap);
1247         return ret;
1248 }