libeap/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_free_key(struct eap_peap_data *data)
 174 {
 175         if (data->key_data) {
 176                 bin_clear_free(data->key_data, EAP_TLS_KEY_LEN);
 177                 data->key_data = NULL;
 178         }
 179 }
 180
 181
 182 static void eap_peap_deinit(struct eap_sm *sm, void *priv)
 183 {
 184         struct eap_peap_data *data = priv;
 185         if (data == NULL)
 186                 return;
 187         if (data->phase2_priv && data->phase2_method)
 188                 data->phase2_method->deinit(sm, data->phase2_priv);
 189         os_free(data->phase2_types);
 190         eap_peer_tls_ssl_deinit(sm, &data->ssl);
 191         eap_peap_free_key(data);
 192         os_free(data->session_id);
 193         wpabuf_free(data->pending_phase2_req);
 194         os_free(data);
 195 }
 196
 197
 198 /**
 199  * eap_tlv_build_nak - Build EAP-TLV NAK message
 200  * @id: EAP identifier for the header
 201  * @nak_type: TLV type (EAP_TLV_*)
 202  * Returns: Buffer to the allocated EAP-TLV NAK message or %NULL on failure
 203  *
 204  * This function builds an EAP-TLV NAK message. The caller is responsible for
 205  * freeing the returned buffer.
 206  */
 207 static struct wpabuf * eap_tlv_build_nak(int id, u16 nak_type)
 208 {
 209         struct wpabuf *msg;
 210
 211         msg = eap_msg_alloc(EAP_VENDOR_IETF, EAP_TYPE_TLV, 10,
 212                             EAP_CODE_RESPONSE, id);
 213         if (msg == NULL)
 214                 return NULL;
 215
 216         wpabuf_put_u8(msg, 0x80); /* Mandatory */
 217         wpabuf_put_u8(msg, EAP_TLV_NAK_TLV);
 218         wpabuf_put_be16(msg, 6); /* Length */
 219         wpabuf_put_be32(msg, 0); /* Vendor-Id */
 220         wpabuf_put_be16(msg, nak_type); /* NAK-Type */
 221
 222         return msg;
 223 }
 224
 225
 226 static int eap_peap_get_isk(struct eap_sm *sm, struct eap_peap_data *data,
 227                             u8 *isk, size_t isk_len)
 228 {
 229         u8 *key;
 230         size_t key_len;
 231
 232         os_memset(isk, 0, isk_len);
 233         if (data->phase2_method == NULL || data->phase2_priv == NULL ||
 234             data->phase2_method->isKeyAvailable == NULL ||
 235             data->phase2_method->getKey == NULL)
 236                 return 0;
 237
 238         if (!data->phase2_method->isKeyAvailable(sm, data->phase2_priv) ||
 239             (key = data->phase2_method->getKey(sm, data->phase2_priv,
 240                                                &key_len)) == NULL) {
 241                 wpa_printf(MSG_DEBUG, "EAP-PEAP: Could not get key material "
 242                            "from Phase 2");
 243                 return -1;
 244         }
 245
 246         if (key_len > isk_len)
 247                 key_len = isk_len;
 248         os_memcpy(isk, key, key_len);
 249         os_free(key);
 250
 251         return 0;
 252 }
 253
 254
 255 static int eap_peap_derive_cmk(struct eap_sm *sm, struct eap_peap_data *data)
 256 {
 257         u8 *tk;
 258         u8 isk[32], imck[60];
 259
 260         /*
 261          * Tunnel key (TK) is the first 60 octets of the key generated by
 262          * phase 1 of PEAP (based on TLS).
 263          */
 264         tk = data->key_data;
 265         if (tk == NULL)
 266                 return -1;
 267         wpa_hexdump_key(MSG_DEBUG, "EAP-PEAP: TK", tk, 60);
 268
 269         if (data->reauth &&
 270             tls_connection_resumed(sm->ssl_ctx, data->ssl.conn)) {
 271                 /* Fast-connect: IPMK|CMK = TK */
 272                 os_memcpy(data->ipmk, tk, 40);
 273                 wpa_hexdump_key(MSG_DEBUG, "EAP-PEAP: IPMK from TK",
 274                                 data->ipmk, 40);
 275                 os_memcpy(data->cmk, tk + 40, 20);
 276                 wpa_hexdump_key(MSG_DEBUG, "EAP-PEAP: CMK from TK",
 277                                 data->cmk, 20);
 278                 return 0;
 279         }
 280
 281         if (eap_peap_get_isk(sm, data, isk, sizeof(isk)) < 0)
 282                 return -1;
 283         wpa_hexdump_key(MSG_DEBUG, "EAP-PEAP: ISK", isk, sizeof(isk));
 284
 285         /*
 286          * IPMK Seed = "Inner Methods Compound Keys" | ISK
 287          * TempKey = First 40 octets of TK
 288          * IPMK|CMK = PRF+(TempKey, IPMK Seed, 60)
 289          * (note: draft-josefsson-pppext-eap-tls-eap-10.txt includes a space
 290          * in the end of the label just before ISK; is that just a typo?)
 291          */
 292         wpa_hexdump_key(MSG_DEBUG, "EAP-PEAP: TempKey", tk, 40);
 293         if (peap_prfplus(data->peap_version, tk, 40,
 294                          "Inner Methods Compound Keys",
 295                          isk, sizeof(isk), imck, sizeof(imck)) < 0)
 296                 return -1;
 297         wpa_hexdump_key(MSG_DEBUG, "EAP-PEAP: IMCK (IPMKj)",
 298                         imck, sizeof(imck));
 299
 300         os_memcpy(data->ipmk, imck, 40);
 301         wpa_hexdump_key(MSG_DEBUG, "EAP-PEAP: IPMK (S-IPMKj)", data->ipmk, 40);
 302         os_memcpy(data->cmk, imck + 40, 20);
 303         wpa_hexdump_key(MSG_DEBUG, "EAP-PEAP: CMK (CMKj)", data->cmk, 20);
 304
 305         return 0;
 306 }
 307
 308
 309 static int eap_tlv_add_cryptobinding(struct eap_sm *sm,
 310                                      struct eap_peap_data *data,
 311                                      struct wpabuf *buf)
 312 {
 313         u8 *mac;
 314         u8 eap_type = EAP_TYPE_PEAP;
 315         const u8 *addr[2];
 316         size_t len[2];
 317         u16 tlv_type;
 318
 319         /* Compound_MAC: HMAC-SHA1-160(cryptobinding TLV | EAP type) */
 320         addr[0] = wpabuf_put(buf, 0);
 321         len[0] = 60;
 322         addr[1] = &eap_type;
 323         len[1] = 1;
 324
 325         tlv_type = EAP_TLV_CRYPTO_BINDING_TLV;
 326         wpabuf_put_be16(buf, tlv_type);
 327         wpabuf_put_be16(buf, 56);
 328
 329         wpabuf_put_u8(buf, 0); /* Reserved */
 330         wpabuf_put_u8(buf, data->peap_version); /* Version */
 331         wpabuf_put_u8(buf, data->peap_version); /* RecvVersion */
 332         wpabuf_put_u8(buf, 1); /* SubType: 0 = Request, 1 = Response */
 333         wpabuf_put_data(buf, data->binding_nonce, 32); /* Nonce */
 334         mac = wpabuf_put(buf, 20); /* Compound_MAC */
 335         wpa_hexdump(MSG_MSGDUMP, "EAP-PEAP: Compound_MAC CMK", data->cmk, 20);
 336         wpa_hexdump(MSG_MSGDUMP, "EAP-PEAP: Compound_MAC data 1",
 337                     addr[0], len[0]);
 338         wpa_hexdump(MSG_MSGDUMP, "EAP-PEAP: Compound_MAC data 2",
 339                     addr[1], len[1]);
 340         hmac_sha1_vector(data->cmk, 20, 2, addr, len, mac);
 341         wpa_hexdump(MSG_MSGDUMP, "EAP-PEAP: Compound_MAC", mac, SHA1_MAC_LEN);
 342         data->crypto_binding_used = 1;
 343
 344         return 0;
 345 }
 346
 347
 348 /**
 349  * eap_tlv_build_result - Build EAP-TLV Result message
 350  * @id: EAP identifier for the header
 351  * @status: Status (EAP_TLV_RESULT_SUCCESS or EAP_TLV_RESULT_FAILURE)
 352  * Returns: Buffer to the allocated EAP-TLV Result message or %NULL on failure
 353  *
 354  * This function builds an EAP-TLV Result message. The caller is responsible
 355  * for freeing the returned buffer.
 356  */
 357 static struct wpabuf * eap_tlv_build_result(struct eap_sm *sm,
 358                                             struct eap_peap_data *data,
 359                                             int crypto_tlv_used,
 360                                             int id, u16 status)
 361 {
 362         struct wpabuf *msg;
 363         size_t len;
 364
 365         if (data->crypto_binding == NO_BINDING)
 366                 crypto_tlv_used = 0;
 367
 368         len = 6;
 369         if (crypto_tlv_used)
 370                 len += 60; /* Cryptobinding TLV */
 371         msg = eap_msg_alloc(EAP_VENDOR_IETF, EAP_TYPE_TLV, len,
 372                             EAP_CODE_RESPONSE, id);
 373         if (msg == NULL)
 374                 return NULL;
 375
 376         wpabuf_put_u8(msg, 0x80); /* Mandatory */
 377         wpabuf_put_u8(msg, EAP_TLV_RESULT_TLV);
 378         wpabuf_put_be16(msg, 2); /* Length */
 379         wpabuf_put_be16(msg, status); /* Status */
 380
 381         if (crypto_tlv_used && eap_tlv_add_cryptobinding(sm, data, msg)) {
 382                 wpabuf_free(msg);
 383                 return NULL;
 384         }
 385
 386         return msg;
 387 }
 388
 389
 390 static int eap_tlv_validate_cryptobinding(struct eap_sm *sm,
 391                                           struct eap_peap_data *data,
 392                                           const u8 *crypto_tlv,
 393                                           size_t crypto_tlv_len)
 394 {
 395         u8 buf[61], mac[SHA1_MAC_LEN];
 396         const u8 *pos;
 397
 398         if (eap_peap_derive_cmk(sm, data) < 0) {
 399                 wpa_printf(MSG_DEBUG, "EAP-PEAP: Could not derive CMK");
 400                 return -1;
 401         }
 402
 403         if (crypto_tlv_len != 4 + 56) {
 404                 wpa_printf(MSG_DEBUG, "EAP-PEAP: Invalid cryptobinding TLV "
 405                            "length %d", (int) crypto_tlv_len);
 406                 return -1;
 407         }
 408
 409         pos = crypto_tlv;
 410         pos += 4; /* TLV header */
 411         if (pos[1] != data->peap_version) {
 412                 wpa_printf(MSG_DEBUG, "EAP-PEAP: Cryptobinding TLV Version "
 413                            "mismatch (was %d; expected %d)",
 414                            pos[1], data->peap_version);
 415                 return -1;
 416         }
 417
 418         if (pos[3] != 0) {
 419                 wpa_printf(MSG_DEBUG, "EAP-PEAP: Unexpected Cryptobinding TLV "
 420                            "SubType %d", pos[3]);
 421                 return -1;
 422         }
 423         pos += 4;
 424         os_memcpy(data->binding_nonce, pos, 32);
 425         pos += 32; /* Nonce */
 426
 427         /* Compound_MAC: HMAC-SHA1-160(cryptobinding TLV | EAP type) */
 428         os_memcpy(buf, crypto_tlv, 60);
 429         os_memset(buf + 4 + 4 + 32, 0, 20); /* Compound_MAC */
 430         buf[60] = EAP_TYPE_PEAP;
 431         wpa_hexdump(MSG_DEBUG, "EAP-PEAP: Compound_MAC data",
 432                     buf, sizeof(buf));
 433         hmac_sha1(data->cmk, 20, buf, sizeof(buf), mac);
 434
 435         if (os_memcmp_const(mac, pos, SHA1_MAC_LEN) != 0) {
 436                 wpa_printf(MSG_DEBUG, "EAP-PEAP: Invalid Compound_MAC in "
 437                            "cryptobinding TLV");
 438                 wpa_hexdump(MSG_DEBUG, "EAP-PEAP: Received MAC",
 439                             pos, SHA1_MAC_LEN);
 440                 wpa_hexdump(MSG_DEBUG, "EAP-PEAP: Expected MAC",
 441                             mac, SHA1_MAC_LEN);
 442                 return -1;
 443         }
 444
 445         wpa_printf(MSG_DEBUG, "EAP-PEAP: Valid cryptobinding TLV received");
 446
 447         return 0;
 448 }
 449
 450
 451 /**
 452  * eap_tlv_process - Process a received EAP-TLV message and generate a response
 453  * @sm: Pointer to EAP state machine allocated with eap_peer_sm_init()
 454  * @ret: Return values from EAP request validation and processing
 455  * @req: EAP-TLV request to be processed. The caller must have validated that
 456  * the buffer is large enough to contain full request (hdr->length bytes) and
 457  * that the EAP type is EAP_TYPE_TLV.
 458  * @resp: Buffer to return a pointer to the allocated response message. This
 459  * field should be initialized to %NULL before the call. The value will be
 460  * updated if a response message is generated. The caller is responsible for
 461  * freeing the allocated message.
 462  * @force_failure: Force negotiation to fail
 463  * Returns: 0 on success, -1 on failure
 464  */
 465 static int eap_tlv_process(struct eap_sm *sm, struct eap_peap_data *data,
 466                            struct eap_method_ret *ret,
 467                            const struct wpabuf *req, struct wpabuf **resp,
 468                            int force_failure)
 469 {
 470         size_t left, tlv_len;
 471         const u8 *pos;
 472         const u8 *result_tlv = NULL, *crypto_tlv = NULL;
 473         size_t result_tlv_len = 0, crypto_tlv_len = 0;
 474         int tlv_type, mandatory;
 475
 476         /* Parse TLVs */
 477         pos = eap_hdr_validate(EAP_VENDOR_IETF, EAP_TYPE_TLV, req, &left);
 478         if (pos == NULL)
 479                 return -1;
 480         wpa_hexdump(MSG_DEBUG, "EAP-TLV: Received TLVs", pos, left);
 481         while (left >= 4) {
 482                 mandatory = !!(pos[0] & 0x80);
 483                 tlv_type = WPA_GET_BE16(pos) & 0x3fff;
 484                 pos += 2;
 485                 tlv_len = WPA_GET_BE16(pos);
 486                 pos += 2;
 487                 left -= 4;
 488                 if (tlv_len > left) {
 489                         wpa_printf(MSG_DEBUG, "EAP-TLV: TLV underrun "
 490                                    "(tlv_len=%lu left=%lu)",
 491                                    (unsigned long) tlv_len,
 492                                    (unsigned long) left);
 493                         return -1;
 494                 }
 495                 switch (tlv_type) {
 496                 case EAP_TLV_RESULT_TLV:
 497                         result_tlv = pos;
 498                         result_tlv_len = tlv_len;
 499                         break;
 500                 case EAP_TLV_CRYPTO_BINDING_TLV:
 501                         crypto_tlv = pos;
 502                         crypto_tlv_len = tlv_len;
 503                         break;
 504                 default:
 505                         wpa_printf(MSG_DEBUG, "EAP-TLV: Unsupported TLV Type "
 506                                    "%d%s", tlv_type,
 507                                    mandatory ? " (mandatory)" : "");
 508                         if (mandatory) {
 509                                 /* NAK TLV and ignore all TLVs in this packet.
 510                                  */
 511                                 *resp = eap_tlv_build_nak(eap_get_id(req),
 512                                                           tlv_type);
 513                                 return *resp == NULL ? -1 : 0;
 514                         }
 515                         /* Ignore this TLV, but process other TLVs */
 516                         break;
 517                 }
 518
 519                 pos += tlv_len;
 520                 left -= tlv_len;
 521         }
 522         if (left) {
 523                 wpa_printf(MSG_DEBUG, "EAP-TLV: Last TLV too short in "
 524                            "Request (left=%lu)", (unsigned long) left);
 525                 return -1;
 526         }
 527
 528         /* Process supported TLVs */
 529         if (crypto_tlv && data->crypto_binding != NO_BINDING) {
 530                 wpa_hexdump(MSG_DEBUG, "EAP-PEAP: Cryptobinding TLV",
 531                             crypto_tlv, crypto_tlv_len);
 532                 if (eap_tlv_validate_cryptobinding(sm, data, crypto_tlv - 4,
 533                                                    crypto_tlv_len + 4) < 0) {
 534                         if (result_tlv == NULL)
 535                                 return -1;
 536                         force_failure = 1;
 537                         crypto_tlv = NULL; /* do not include Cryptobinding TLV
 538                                             * in response, if the received
 539                                             * cryptobinding was invalid. */
 540                 }
 541         } else if (!crypto_tlv && data->crypto_binding == REQUIRE_BINDING) {
 542                 wpa_printf(MSG_DEBUG, "EAP-PEAP: No cryptobinding TLV");
 543                 return -1;
 544         }
 545
 546         if (result_tlv) {
 547                 int status, resp_status;
 548                 wpa_hexdump(MSG_DEBUG, "EAP-TLV: Result TLV",
 549                             result_tlv, result_tlv_len);
 550                 if (result_tlv_len < 2) {
 551                         wpa_printf(MSG_INFO, "EAP-TLV: Too short Result TLV "
 552                                    "(len=%lu)",
 553                                    (unsigned long) result_tlv_len);
 554                         return -1;
 555                 }
 556                 status = WPA_GET_BE16(result_tlv);
 557                 if (status == EAP_TLV_RESULT_SUCCESS) {
 558                         wpa_printf(MSG_INFO, "EAP-TLV: TLV Result - Success "
 559                                    "- EAP-TLV/Phase2 Completed");
 560                         if (force_failure) {
 561                                 wpa_printf(MSG_INFO, "EAP-TLV: Earlier failure"
 562                                            " - force failed Phase 2");
 563                                 resp_status = EAP_TLV_RESULT_FAILURE;
 564                                 ret->decision = DECISION_FAIL;
 565                         } else {
 566                                 resp_status = EAP_TLV_RESULT_SUCCESS;
 567                                 ret->decision = DECISION_UNCOND_SUCC;
 568                         }
 569                 } else if (status == EAP_TLV_RESULT_FAILURE) {
 570                         wpa_printf(MSG_INFO, "EAP-TLV: TLV Result - Failure");
 571                         resp_status = EAP_TLV_RESULT_FAILURE;
 572                         ret->decision = DECISION_FAIL;
 573                 } else {
 574                         wpa_printf(MSG_INFO, "EAP-TLV: Unknown TLV Result "
 575                                    "Status %d", status);
 576                         resp_status = EAP_TLV_RESULT_FAILURE;
 577                         ret->decision = DECISION_FAIL;
 578                 }
 579                 ret->methodState = METHOD_DONE;
 580
 581                 *resp = eap_tlv_build_result(sm, data, crypto_tlv != NULL,
 582                                              eap_get_id(req), resp_status);
 583         }
 584
 585         return 0;
 586 }
 587
 588
 589 static int eap_peap_phase2_request(struct eap_sm *sm,
 590                                    struct eap_peap_data *data,
 591                                    struct eap_method_ret *ret,
 592                                    struct wpabuf *req,
 593                                    struct wpabuf **resp)
 594 {
 595         struct eap_hdr *hdr = wpabuf_mhead(req);
 596         size_t len = be_to_host16(hdr->length);
 597         u8 *pos;
 598         struct eap_method_ret iret;
 599         struct eap_peer_config *config = eap_get_config(sm);
 600
 601         if (len <= sizeof(struct eap_hdr)) {
 602                 wpa_printf(MSG_INFO, "EAP-PEAP: too short "
 603                            "Phase 2 request (len=%lu)", (unsigned long) len);
 604                 return -1;
 605         }
 606         pos = (u8 *) (hdr + 1);
 607         wpa_printf(MSG_DEBUG, "EAP-PEAP: Phase 2 Request: type=%d", *pos);
 608         switch (*pos) {
 609         case EAP_TYPE_IDENTITY:
 610                 *resp = eap_sm_buildIdentity(sm, hdr->identifier, 1);
 611                 break;
 612         case EAP_TYPE_TLV:
 613                 os_memset(&iret, 0, sizeof(iret));
 614                 if (eap_tlv_process(sm, data, &iret, req, resp,
 615                                     data->phase2_eap_started &&
 616                                     !data->phase2_eap_success)) {
 617                         ret->methodState = METHOD_DONE;
 618                         ret->decision = DECISION_FAIL;
 619                         return -1;
 620                 }
 621                 if (iret.methodState == METHOD_DONE ||
 622                     iret.methodState == METHOD_MAY_CONT) {
 623                         ret->methodState = iret.methodState;
 624                         ret->decision = iret.decision;
 625                         data->phase2_success = 1;
 626                 }
 627                 break;
 628         case EAP_TYPE_EXPANDED:
 629 #ifdef EAP_TNC
 630                 if (data->soh) {
 631                         const u8 *epos;
 632                         size_t eleft;
 633
 634                         epos = eap_hdr_validate(EAP_VENDOR_MICROSOFT, 0x21,
 635                                                 req, &eleft);
 636                         if (epos) {
 637                                 struct wpabuf *buf;
 638                                 wpa_printf(MSG_DEBUG,
 639                                            "EAP-PEAP: SoH EAP Extensions");
 640                                 buf = tncc_process_soh_request(data->soh,
 641                                                                epos, eleft);
 642                                 if (buf) {
 643                                         *resp = eap_msg_alloc(
 644                                                 EAP_VENDOR_MICROSOFT, 0x21,
 645                                                 wpabuf_len(buf),
 646                                                 EAP_CODE_RESPONSE,
 647                                                 hdr->identifier);
 648                                         if (*resp == NULL) {
 649                                                 ret->methodState = METHOD_DONE;
 650                                                 ret->decision = DECISION_FAIL;
 651                                                 return -1;
 652                                         }
 653                                         wpabuf_put_buf(*resp, buf);
 654                                         wpabuf_free(buf);
 655                                         break;
 656                                 }
 657                         }
 658                 }
 659 #endif /* EAP_TNC */
 660                 /* fall through */
 661         default:
 662                 if (data->phase2_type.vendor == EAP_VENDOR_IETF &&
 663                     data->phase2_type.method == EAP_TYPE_NONE) {
 664                         size_t i;
 665                         for (i = 0; i < data->num_phase2_types; i++) {
 666                                 if (data->phase2_types[i].vendor !=
 667                                     EAP_VENDOR_IETF ||
 668                                     data->phase2_types[i].method != *pos)
 669                                         continue;
 670
 671                                 data->phase2_type.vendor =
 672                                         data->phase2_types[i].vendor;
 673                                 data->phase2_type.method =
 674                                         data->phase2_types[i].method;
 675                                 wpa_printf(MSG_DEBUG, "EAP-PEAP: Selected "
 676                                            "Phase 2 EAP vendor %d method %d",
 677                                            data->phase2_type.vendor,
 678                                            data->phase2_type.method);
 679                                 break;
 680                         }
 681                 }
 682                 if (*pos != data->phase2_type.method ||
 683                     *pos == EAP_TYPE_NONE) {
 684                         if (eap_peer_tls_phase2_nak(data->phase2_types,
 685                                                     data->num_phase2_types,
 686                                                     hdr, resp))
 687                                 return -1;
 688                         return 0;
 689                 }
 690
 691                 if (data->phase2_priv == NULL) {
 692                         data->phase2_method = eap_peer_get_eap_method(
 693                                 data->phase2_type.vendor,
 694                                 data->phase2_type.method);
 695                         if (data->phase2_method) {
 696                                 sm->init_phase2 = 1;
 697                                 data->phase2_priv =
 698                                         data->phase2_method->init(sm);
 699                                 sm->init_phase2 = 0;
 700                         }
 701                 }
 702                 if (data->phase2_priv == NULL || data->phase2_method == NULL) {
 703                         wpa_printf(MSG_INFO, "EAP-PEAP: failed to initialize "
 704                                    "Phase 2 EAP method %d", *pos);
 705                         ret->methodState = METHOD_DONE;
 706                         ret->decision = DECISION_FAIL;
 707                         return -1;
 708                 }
 709                 data->phase2_eap_started = 1;
 710                 os_memset(&iret, 0, sizeof(iret));
 711                 *resp = data->phase2_method->process(sm, data->phase2_priv,
 712                                                      &iret, req);
 713                 if ((iret.methodState == METHOD_DONE ||
 714                      iret.methodState == METHOD_MAY_CONT) &&
 715                     (iret.decision == DECISION_UNCOND_SUCC ||
 716                      iret.decision == DECISION_COND_SUCC)) {
 717                         data->phase2_eap_success = 1;
 718                         data->phase2_success = 1;
 719                 }
 720                 break;
 721         }
 722
 723         if (*resp == NULL &&
 724             (config->pending_req_identity || config->pending_req_password ||
 725              config->pending_req_otp || config->pending_req_new_password)) {
 726                 wpabuf_free(data->pending_phase2_req);
 727                 data->pending_phase2_req = wpabuf_alloc_copy(hdr, len);
 728         }
 729
 730         return 0;
 731 }
 732
 733
 734 static int eap_peap_decrypt(struct eap_sm *sm, struct eap_peap_data *data,
 735                             struct eap_method_ret *ret,
 736                             const struct eap_hdr *req,
 737                             const struct wpabuf *in_data,
 738                             struct wpabuf **out_data)
 739 {
 740         struct wpabuf *in_decrypted = NULL;
 741         int res, skip_change = 0;
 742         struct eap_hdr *hdr, *rhdr;
 743         struct wpabuf *resp = NULL;
 744         size_t len;
 745
 746         wpa_printf(MSG_DEBUG, "EAP-PEAP: received %lu bytes encrypted data for"
 747                    " Phase 2", (unsigned long) wpabuf_len(in_data));
 748
 749         if (data->pending_phase2_req) {
 750                 wpa_printf(MSG_DEBUG, "EAP-PEAP: Pending Phase 2 request - "
 751                            "skip decryption and use old data");
 752                 /* Clear TLS reassembly state. */
 753                 eap_peer_tls_reset_input(&data->ssl);
 754                 in_decrypted = data->pending_phase2_req;
 755                 data->pending_phase2_req = NULL;
 756                 skip_change = 1;
 757                 goto continue_req;
 758         }
 759
 760         if (wpabuf_len(in_data) == 0 && sm->workaround &&
 761             data->phase2_success) {
 762                 /*
 763                  * Cisco ACS seems to be using TLS ACK to terminate
 764                  * EAP-PEAPv0/GTC. Try to reply with TLS ACK.
 765                  */
 766                 wpa_printf(MSG_DEBUG, "EAP-PEAP: Received TLS ACK, but "
 767                            "expected data - acknowledge with TLS ACK since "
 768                            "Phase 2 has been completed");
 769                 ret->decision = DECISION_COND_SUCC;
 770                 ret->methodState = METHOD_DONE;
 771                 return 1;
 772         } else if (wpabuf_len(in_data) == 0) {
 773                 /* Received TLS ACK - requesting more fragments */
 774                 return eap_peer_tls_encrypt(sm, &data->ssl, EAP_TYPE_PEAP,
 775                                             data->peap_version,
 776                                             req->identifier, NULL, out_data);
 777         }
 778
 779         res = eap_peer_tls_decrypt(sm, &data->ssl, in_data, &in_decrypted);
 780         if (res)
 781                 return res;
 782
 783 continue_req:
 784         wpa_hexdump_buf(MSG_DEBUG, "EAP-PEAP: Decrypted Phase 2 EAP",
 785                         in_decrypted);
 786
 787         hdr = wpabuf_mhead(in_decrypted);
 788         if (wpabuf_len(in_decrypted) == 5 && hdr->code == EAP_CODE_REQUEST &&
 789             be_to_host16(hdr->length) == 5 &&
 790             eap_get_type(in_decrypted) == EAP_TYPE_IDENTITY) {
 791                 /* At least FreeRADIUS seems to send full EAP header with
 792                  * EAP Request Identity */
 793                 skip_change = 1;
 794         }
 795         if (wpabuf_len(in_decrypted) >= 5 && hdr->code == EAP_CODE_REQUEST &&
 796             eap_get_type(in_decrypted) == EAP_TYPE_TLV) {
 797                 skip_change = 1;
 798         }
 799
 800         if (data->peap_version == 0 && !skip_change) {
 801                 struct eap_hdr *nhdr;
 802                 struct wpabuf *nmsg = wpabuf_alloc(sizeof(struct eap_hdr) +
 803                                                    wpabuf_len(in_decrypted));
 804                 if (nmsg == NULL) {
 805                         wpabuf_free(in_decrypted);
 806                         return 0;
 807                 }
 808                 nhdr = wpabuf_put(nmsg, sizeof(*nhdr));
 809                 wpabuf_put_buf(nmsg, in_decrypted);
 810                 nhdr->code = req->code;
 811                 nhdr->identifier = req->identifier;
 812                 nhdr->length = host_to_be16(sizeof(struct eap_hdr) +
 813                                             wpabuf_len(in_decrypted));
 814
 815                 wpabuf_free(in_decrypted);
 816                 in_decrypted = nmsg;
 817         }
 818
 819         hdr = wpabuf_mhead(in_decrypted);
 820         if (wpabuf_len(in_decrypted) < sizeof(*hdr)) {
 821                 wpa_printf(MSG_INFO, "EAP-PEAP: Too short Phase 2 "
 822                            "EAP frame (len=%lu)",
 823                            (unsigned long) wpabuf_len(in_decrypted));
 824                 wpabuf_free(in_decrypted);
 825                 return 0;
 826         }
 827         len = be_to_host16(hdr->length);
 828         if (len > wpabuf_len(in_decrypted)) {
 829                 wpa_printf(MSG_INFO, "EAP-PEAP: Length mismatch in "
 830                            "Phase 2 EAP frame (len=%lu hdr->length=%lu)",
 831                            (unsigned long) wpabuf_len(in_decrypted),
 832                            (unsigned long) len);
 833                 wpabuf_free(in_decrypted);
 834                 return 0;
 835         }
 836         if (len < wpabuf_len(in_decrypted)) {
 837                 wpa_printf(MSG_INFO, "EAP-PEAP: Odd.. Phase 2 EAP header has "
 838                            "shorter length than full decrypted data "
 839                            "(%lu < %lu)",
 840                            (unsigned long) len,
 841                            (unsigned long) wpabuf_len(in_decrypted));
 842         }
 843         wpa_printf(MSG_DEBUG, "EAP-PEAP: received Phase 2: code=%d "
 844                    "identifier=%d length=%lu", hdr->code, hdr->identifier,
 845                    (unsigned long) len);
 846         switch (hdr->code) {
 847         case EAP_CODE_REQUEST:
 848                 if (eap_peap_phase2_request(sm, data, ret, in_decrypted,
 849                                             &resp)) {
 850                         wpabuf_free(in_decrypted);
 851                         wpa_printf(MSG_INFO, "EAP-PEAP: Phase2 Request "
 852                                    "processing failed");
 853                         return 0;
 854                 }
 855                 break;
 856         case EAP_CODE_SUCCESS:
 857                 wpa_printf(MSG_DEBUG, "EAP-PEAP: Phase 2 Success");
 858                 if (data->peap_version == 1) {
 859                         /* EAP-Success within TLS tunnel is used to indicate
 860                          * shutdown of the TLS channel. The authentication has
 861                          * been completed. */
 862                         if (data->phase2_eap_started &&
 863                             !data->phase2_eap_success) {
 864                                 wpa_printf(MSG_DEBUG, "EAP-PEAP: Phase 2 "
 865                                            "Success used to indicate success, "
 866                                            "but Phase 2 EAP was not yet "
 867                                            "completed successfully");
 868                                 ret->methodState = METHOD_DONE;
 869                                 ret->decision = DECISION_FAIL;
 870                                 wpabuf_free(in_decrypted);
 871                                 return 0;
 872                         }
 873                         wpa_printf(MSG_DEBUG, "EAP-PEAP: Version 1 - "
 874                                    "EAP-Success within TLS tunnel - "
 875                                    "authentication completed");
 876                         ret->decision = DECISION_UNCOND_SUCC;
 877                         ret->methodState = METHOD_DONE;
 878                         data->phase2_success = 1;
 879                         if (data->peap_outer_success == 2) {
 880                                 wpabuf_free(in_decrypted);
 881                                 wpa_printf(MSG_DEBUG, "EAP-PEAP: Use TLS ACK "
 882                                            "to finish authentication");
 883                                 return 1;
 884                         } else if (data->peap_outer_success == 1) {
 885                                 /* Reply with EAP-Success within the TLS
 886                                  * channel to complete the authentication. */
 887                                 resp = wpabuf_alloc(sizeof(struct eap_hdr));
 888                                 if (resp) {
 889                                         rhdr = wpabuf_put(resp, sizeof(*rhdr));
 890                                         rhdr->code = EAP_CODE_SUCCESS;
 891                                         rhdr->identifier = hdr->identifier;
 892                                         rhdr->length =
 893                                                 host_to_be16(sizeof(*rhdr));
 894                                 }
 895                         } else {
 896                                 /* No EAP-Success expected for Phase 1 (outer,
 897                                  * unencrypted auth), so force EAP state
 898                                  * machine to SUCCESS state. */
 899                                 sm->peap_done = TRUE;
 900                         }
 901                 } else {
 902                         /* FIX: ? */
 903                 }
 904                 break;
 905         case EAP_CODE_FAILURE:
 906                 wpa_printf(MSG_DEBUG, "EAP-PEAP: Phase 2 Failure");
 907                 ret->decision = DECISION_FAIL;
 908                 ret->methodState = METHOD_MAY_CONT;
 909                 ret->allowNotifications = FALSE;
 910                 /* Reply with EAP-Failure within the TLS channel to complete
 911                  * failure reporting. */
 912                 resp = wpabuf_alloc(sizeof(struct eap_hdr));
 913                 if (resp) {
 914                         rhdr = wpabuf_put(resp, sizeof(*rhdr));
 915                         rhdr->code = EAP_CODE_FAILURE;
 916                         rhdr->identifier = hdr->identifier;
 917                         rhdr->length = host_to_be16(sizeof(*rhdr));
 918                 }
 919                 break;
 920         default:
 921                 wpa_printf(MSG_INFO, "EAP-PEAP: Unexpected code=%d in "
 922                            "Phase 2 EAP header", hdr->code);
 923                 break;
 924         }
 925
 926         wpabuf_free(in_decrypted);
 927
 928         if (resp) {
 929                 int skip_change2 = 0;
 930                 struct wpabuf *rmsg, buf;
 931
 932                 wpa_hexdump_buf_key(MSG_DEBUG,
 933                                     "EAP-PEAP: Encrypting Phase 2 data", resp);
 934                 /* PEAP version changes */
 935                 if (wpabuf_len(resp) >= 5 &&
 936                     wpabuf_head_u8(resp)[0] == EAP_CODE_RESPONSE &&
 937                     eap_get_type(resp) == EAP_TYPE_TLV)
 938                         skip_change2 = 1;
 939                 rmsg = resp;
 940                 if (data->peap_version == 0 && !skip_change2) {
 941                         wpabuf_set(&buf, wpabuf_head_u8(resp) +
 942                                    sizeof(struct eap_hdr),
 943                                    wpabuf_len(resp) - sizeof(struct eap_hdr));
 944                         rmsg = &buf;
 945                 }
 946
 947                 if (eap_peer_tls_encrypt(sm, &data->ssl, EAP_TYPE_PEAP,
 948                                          data->peap_version, req->identifier,
 949                                          rmsg, out_data)) {
 950                         wpa_printf(MSG_INFO, "EAP-PEAP: Failed to encrypt "
 951                                    "a Phase 2 frame");
 952                 }
 953                 wpabuf_free(resp);
 954         }
 955
 956         return 0;
 957 }
 958
 959
 960 static struct wpabuf * eap_peap_process(struct eap_sm *sm, void *priv,
 961                                         struct eap_method_ret *ret,
 962                                         const struct wpabuf *reqData)
 963 {
 964         const struct eap_hdr *req;
 965         size_t left;
 966         int res;
 967         u8 flags, id;
 968         struct wpabuf *resp;
 969         const u8 *pos;
 970         struct eap_peap_data *data = priv;
 971         struct wpabuf msg;
 972
 973         pos = eap_peer_tls_process_init(sm, &data->ssl, EAP_TYPE_PEAP, ret,
 974                                         reqData, &left, &flags);
 975         if (pos == NULL)
 976                 return NULL;
 977         req = wpabuf_head(reqData);
 978         id = req->identifier;
 979
 980         if (flags & EAP_TLS_FLAGS_START) {
 981                 wpa_printf(MSG_DEBUG, "EAP-PEAP: Start (server ver=%d, own "
 982                            "ver=%d)", flags & EAP_TLS_VERSION_MASK,
 983                         data->peap_version);
 984                 if ((flags & EAP_TLS_VERSION_MASK) < data->peap_version)
 985                         data->peap_version = flags & EAP_TLS_VERSION_MASK;
 986                 if (data->force_peap_version >= 0 &&
 987                     data->force_peap_version != data->peap_version) {
 988                         wpa_printf(MSG_WARNING, "EAP-PEAP: Failed to select "
 989                                    "forced PEAP version %d",
 990                                    data->force_peap_version);
 991                         ret->methodState = METHOD_DONE;
 992                         ret->decision = DECISION_FAIL;
 993                         ret->allowNotifications = FALSE;
 994                         return NULL;
 995                 }
 996                 wpa_printf(MSG_DEBUG, "EAP-PEAP: Using PEAP version %d",
 997                            data->peap_version);
 998                 left = 0; /* make sure that this frame is empty, even though it
 999                            * should always be, anyway */
1000         }
1001
1002         wpabuf_set(&msg, pos, left);
1003
1004         resp = NULL;
1005         if (tls_connection_established(sm->ssl_ctx, data->ssl.conn) &&
1006             !data->resuming) {
1007                 res = eap_peap_decrypt(sm, data, ret, req, &msg, &resp);
1008         } else {
1009                 res = eap_peer_tls_process_helper(sm, &data->ssl,
1010                                                   EAP_TYPE_PEAP,
1011                                                   data->peap_version, id, &msg,
1012                                                   &resp);
1013
1014                 if (res < 0) {
1015                         wpa_printf(MSG_DEBUG,
1016                                    "EAP-PEAP: TLS processing failed");
1017                         ret->methodState = METHOD_DONE;
1018                         ret->decision = DECISION_FAIL;
1019                         return resp;
1020                 }
1021                 if (tls_connection_established(sm->ssl_ctx, data->ssl.conn)) {
1022                         char *label;
1023                         wpa_printf(MSG_DEBUG,
1024                                    "EAP-PEAP: TLS done, proceed to Phase 2");
1025                         eap_peap_free_key(data);
1026                         /* draft-josefsson-ppext-eap-tls-eap-05.txt
1027                          * specifies that PEAPv1 would use "client PEAP
1028                          * encryption" as the label. However, most existing
1029                          * PEAPv1 implementations seem to be using the old
1030                          * label, "client EAP encryption", instead. Use the old
1031                          * label by default, but allow it to be configured with
1032                          * phase1 parameter peaplabel=1. */
1033                         if (data->force_new_label)
1034                                 label = "client PEAP encryption";
1035                         else
1036                                 label = "client EAP encryption";
1037                         wpa_printf(MSG_DEBUG, "EAP-PEAP: using label '%s' in "
1038                                    "key derivation", label);
1039                         data->key_data =
1040                                 eap_peer_tls_derive_key(sm, &data->ssl, label,
1041                                                         EAP_TLS_KEY_LEN);
1042                         if (data->key_data) {
1043                                 wpa_hexdump_key(MSG_DEBUG,
1044                                                 "EAP-PEAP: Derived key",
1045                                                 data->key_data,
1046                                                 EAP_TLS_KEY_LEN);
1047                         } else {
1048                                 wpa_printf(MSG_DEBUG, "EAP-PEAP: Failed to "
1049                                            "derive key");
1050                         }
1051
1052                         os_free(data->session_id);
1053                         data->session_id =
1054                                 eap_peer_tls_derive_session_id(sm, &data->ssl,
1055                                                                EAP_TYPE_PEAP,
1056                                                                &data->id_len);
1057                         if (data->session_id) {
1058                                 wpa_hexdump(MSG_DEBUG,
1059                                             "EAP-PEAP: Derived Session-Id",
1060                                             data->session_id, data->id_len);
1061                         } else {
1062                                 wpa_printf(MSG_ERROR, "EAP-PEAP: Failed to "
1063                                            "derive Session-Id");
1064                         }
1065
1066                         if (sm->workaround && data->resuming) {
1067                                 /*
1068                                  * At least few RADIUS servers (Aegis v1.1.6;
1069                                  * but not v1.1.4; and Cisco ACS) seem to be
1070                                  * terminating PEAPv1 (Aegis) or PEAPv0 (Cisco
1071                                  * ACS) session resumption with outer
1072                                  * EAP-Success. This does not seem to follow
1073                                  * draft-josefsson-pppext-eap-tls-eap-05.txt
1074                                  * section 4.2, so only allow this if EAP
1075                                  * workarounds are enabled.
1076                                  */
1077                                 wpa_printf(MSG_DEBUG, "EAP-PEAP: Workaround - "
1078                                            "allow outer EAP-Success to "
1079                                            "terminate PEAP resumption");
1080                                 ret->decision = DECISION_COND_SUCC;
1081                                 data->phase2_success = 1;
1082                         }
1083
1084                         data->resuming = 0;
1085                 }
1086
1087                 if (res == 2) {
1088                         /*
1089                          * Application data included in the handshake message.
1090                          */
1091                         wpabuf_free(data->pending_phase2_req);
1092                         data->pending_phase2_req = resp;
1093                         resp = NULL;
1094                         res = eap_peap_decrypt(sm, data, ret, req, &msg,
1095                                                &resp);
1096                 }
1097         }
1098
1099         if (ret->methodState == METHOD_DONE) {
1100                 ret->allowNotifications = FALSE;
1101         }
1102
1103         if (res == 1) {
1104                 wpabuf_free(resp);
1105                 return eap_peer_tls_build_ack(id, EAP_TYPE_PEAP,
1106                                               data->peap_version);
1107         }
1108
1109         return resp;
1110 }
1111
1112
1113 static Boolean eap_peap_has_reauth_data(struct eap_sm *sm, void *priv)
1114 {
1115         struct eap_peap_data *data = priv;
1116         return tls_connection_established(sm->ssl_ctx, data->ssl.conn) &&
1117                 data->phase2_success;
1118 }
1119
1120
1121 static void eap_peap_deinit_for_reauth(struct eap_sm *sm, void *priv)
1122 {
1123         struct eap_peap_data *data = priv;
1124         wpabuf_free(data->pending_phase2_req);
1125         data->pending_phase2_req = NULL;
1126         data->crypto_binding_used = 0;
1127 }
1128
1129
1130 static void * eap_peap_init_for_reauth(struct eap_sm *sm, void *priv)
1131 {
1132         struct eap_peap_data *data = priv;
1133         eap_peap_free_key(data);
1134         os_free(data->session_id);
1135         data->session_id = NULL;
1136         if (eap_peer_tls_reauth_init(sm, &data->ssl)) {
1137                 os_free(data);
1138                 return NULL;
1139         }
1140         if (data->phase2_priv && data->phase2_method &&
1141             data->phase2_method->init_for_reauth)
1142                 data->phase2_method->init_for_reauth(sm, data->phase2_priv);
1143         data->phase2_success = 0;
1144         data->phase2_eap_success = 0;
1145         data->phase2_eap_started = 0;
1146         data->resuming = 1;
1147         data->reauth = 1;
1148         sm->peap_done = FALSE;
1149         return priv;
1150 }
1151
1152
1153 static int eap_peap_get_status(struct eap_sm *sm, void *priv, char *buf,
1154                                size_t buflen, int verbose)
1155 {
1156         struct eap_peap_data *data = priv;
1157         int len, ret;
1158
1159         len = eap_peer_tls_status(sm, &data->ssl, buf, buflen, verbose);
1160         if (data->phase2_method) {
1161                 ret = os_snprintf(buf + len, buflen - len,
1162                                   "EAP-PEAPv%d Phase2 method=%s\n",
1163                                   data->peap_version,
1164                                   data->phase2_method->name);
1165                 if (os_snprintf_error(buflen - len, ret))
1166                         return len;
1167                 len += ret;
1168         }
1169         return len;
1170 }
1171
1172
1173 static Boolean eap_peap_isKeyAvailable(struct eap_sm *sm, void *priv)
1174 {
1175         struct eap_peap_data *data = priv;
1176         return data->key_data != NULL && data->phase2_success;
1177 }
1178
1179
1180 static u8 * eap_peap_getKey(struct eap_sm *sm, void *priv, size_t *len)
1181 {
1182         struct eap_peap_data *data = priv;
1183         u8 *key;
1184
1185         if (data->key_data == NULL || !data->phase2_success)
1186                 return NULL;
1187
1188         key = os_malloc(EAP_TLS_KEY_LEN);
1189         if (key == NULL)
1190                 return NULL;
1191
1192         *len = EAP_TLS_KEY_LEN;
1193
1194         if (data->crypto_binding_used) {
1195                 u8 csk[128];
1196                 /*
1197                  * Note: It looks like Microsoft implementation requires null
1198                  * termination for this label while the one used for deriving
1199                  * IPMK|CMK did not use null termination.
1200                  */
1201                 if (peap_prfplus(data->peap_version, data->ipmk, 40,
1202                                  "Session Key Generating Function",
1203                                  (u8 *) "\00", 1, csk, sizeof(csk)) < 0) {
1204                         os_free(key);
1205                         return NULL;
1206                 }
1207                 wpa_hexdump_key(MSG_DEBUG, "EAP-PEAP: CSK", csk, sizeof(csk));
1208                 os_memcpy(key, csk, EAP_TLS_KEY_LEN);
1209                 wpa_hexdump(MSG_DEBUG, "EAP-PEAP: Derived key",
1210                             key, EAP_TLS_KEY_LEN);
1211         } else
1212                 os_memcpy(key, data->key_data, EAP_TLS_KEY_LEN);
1213
1214         return key;
1215 }
1216
1217
1218 static u8 * eap_peap_get_session_id(struct eap_sm *sm, void *priv, size_t *len)
1219 {
1220         struct eap_peap_data *data = priv;
1221         u8 *id;
1222
1223         if (data->session_id == NULL || !data->phase2_success)
1224                 return NULL;
1225
1226         id = os_malloc(data->id_len);
1227         if (id == NULL)
1228                 return NULL;
1229
1230         *len = data->id_len;
1231         os_memcpy(id, data->session_id, data->id_len);
1232
1233         return id;
1234 }
1235
1236
1237 int eap_peer_peap_register(void)
1238 {
1239         struct eap_method *eap;
1240         int ret;
1241
1242         eap = eap_peer_method_alloc(EAP_PEER_METHOD_INTERFACE_VERSION,
1243                                     EAP_VENDOR_IETF, EAP_TYPE_PEAP, "PEAP");
1244         if (eap == NULL)
1245                 return -1;
1246
1247         eap->init = eap_peap_init;
1248         eap->deinit = eap_peap_deinit;
1249         eap->process = eap_peap_process;
1250         eap->isKeyAvailable = eap_peap_isKeyAvailable;
1251         eap->getKey = eap_peap_getKey;
1252         eap->get_status = eap_peap_get_status;
1253         eap->has_reauth_data = eap_peap_has_reauth_data;
1254         eap->deinit_for_reauth = eap_peap_deinit_for_reauth;
1255         eap->init_for_reauth = eap_peap_init_for_reauth;
1256         eap->getSessionId = eap_peap_get_session_id;
1257
1258         ret = eap_peer_method_register(eap);
1259         if (ret)
1260                 eap_peer_method_free(eap);
1261         return ret;
1262 }