contrib/wpa/src/eap_server/eap_server_gpsk.c

   1 /*
   2  * hostapd / EAP-GPSK (RFC 5433) server
   3  * Copyright (c) 2006-2007, 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/random.h"
  13 #include "eap_server/eap_i.h"
  14 #include "eap_common/eap_gpsk_common.h"
  15
  16
  17 struct eap_gpsk_data {
  18         enum { GPSK_1, GPSK_3, SUCCESS, FAILURE } state;
  19         u8 rand_server[EAP_GPSK_RAND_LEN];
  20         u8 rand_peer[EAP_GPSK_RAND_LEN];
  21         u8 msk[EAP_MSK_LEN];
  22         u8 emsk[EAP_EMSK_LEN];
  23         u8 sk[EAP_GPSK_MAX_SK_LEN];
  24         size_t sk_len;
  25         u8 pk[EAP_GPSK_MAX_PK_LEN];
  26         size_t pk_len;
  27         u8 *id_peer;
  28         size_t id_peer_len;
  29         u8 *id_server;
  30         size_t id_server_len;
  31 #define MAX_NUM_CSUITES 2
  32         struct eap_gpsk_csuite csuite_list[MAX_NUM_CSUITES];
  33         size_t csuite_count;
  34         int vendor; /* CSuite/Vendor */
  35         int specifier; /* CSuite/Specifier */
  36 };
  37
  38
  39 static const char * eap_gpsk_state_txt(int state)
  40 {
  41         switch (state) {
  42         case GPSK_1:
  43                 return "GPSK-1";
  44         case GPSK_3:
  45                 return "GPSK-3";
  46         case SUCCESS:
  47                 return "SUCCESS";
  48         case FAILURE:
  49                 return "FAILURE";
  50         default:
  51                 return "?";
  52         }
  53 }
  54
  55
  56 static void eap_gpsk_state(struct eap_gpsk_data *data, int state)
  57 {
  58         wpa_printf(MSG_DEBUG, "EAP-GPSK: %s -> %s",
  59                    eap_gpsk_state_txt(data->state),
  60                    eap_gpsk_state_txt(state));
  61         data->state = state;
  62 }
  63
  64
  65 static void * eap_gpsk_init(struct eap_sm *sm)
  66 {
  67         struct eap_gpsk_data *data;
  68
  69         data = os_zalloc(sizeof(*data));
  70         if (data == NULL)
  71                 return NULL;
  72         data->state = GPSK_1;
  73
  74         /* TODO: add support for configuring ID_Server */
  75         data->id_server = (u8 *) os_strdup("hostapd");
  76         if (data->id_server)
  77                 data->id_server_len = os_strlen((char *) data->id_server);
  78
  79         data->csuite_count = 0;
  80         if (eap_gpsk_supported_ciphersuite(EAP_GPSK_VENDOR_IETF,
  81                                            EAP_GPSK_CIPHER_AES)) {
  82                 WPA_PUT_BE32(data->csuite_list[data->csuite_count].vendor,
  83                              EAP_GPSK_VENDOR_IETF);
  84                 WPA_PUT_BE16(data->csuite_list[data->csuite_count].specifier,
  85                              EAP_GPSK_CIPHER_AES);
  86                 data->csuite_count++;
  87         }
  88         if (eap_gpsk_supported_ciphersuite(EAP_GPSK_VENDOR_IETF,
  89                                            EAP_GPSK_CIPHER_SHA256)) {
  90                 WPA_PUT_BE32(data->csuite_list[data->csuite_count].vendor,
  91                              EAP_GPSK_VENDOR_IETF);
  92                 WPA_PUT_BE16(data->csuite_list[data->csuite_count].specifier,
  93                              EAP_GPSK_CIPHER_SHA256);
  94                 data->csuite_count++;
  95         }
  96
  97         return data;
  98 }
  99
 100
 101 static void eap_gpsk_reset(struct eap_sm *sm, void *priv)
 102 {
 103         struct eap_gpsk_data *data = priv;
 104         os_free(data->id_server);
 105         os_free(data->id_peer);
 106         os_free(data);
 107 }
 108
 109
 110 static struct wpabuf * eap_gpsk_build_gpsk_1(struct eap_sm *sm,
 111                                              struct eap_gpsk_data *data, u8 id)
 112 {
 113         size_t len;
 114         struct wpabuf *req;
 115
 116         wpa_printf(MSG_DEBUG, "EAP-GPSK: Request/GPSK-1");
 117
 118         if (random_get_bytes(data->rand_server, EAP_GPSK_RAND_LEN)) {
 119                 wpa_printf(MSG_ERROR, "EAP-GPSK: Failed to get random data");
 120                 eap_gpsk_state(data, FAILURE);
 121                 return NULL;
 122         }
 123         wpa_hexdump(MSG_MSGDUMP, "EAP-GPSK: RAND_Server",
 124                     data->rand_server, EAP_GPSK_RAND_LEN);
 125
 126         len = 1 + 2 + data->id_server_len + EAP_GPSK_RAND_LEN + 2 +
 127                 data->csuite_count * sizeof(struct eap_gpsk_csuite);
 128         req = eap_msg_alloc(EAP_VENDOR_IETF, EAP_TYPE_GPSK, len,
 129                             EAP_CODE_REQUEST, id);
 130         if (req == NULL) {
 131                 wpa_printf(MSG_ERROR, "EAP-GPSK: Failed to allocate memory "
 132                            "for request/GPSK-1");
 133                 eap_gpsk_state(data, FAILURE);
 134                 return NULL;
 135         }
 136
 137         wpabuf_put_u8(req, EAP_GPSK_OPCODE_GPSK_1);
 138         wpabuf_put_be16(req, data->id_server_len);
 139         wpabuf_put_data(req, data->id_server, data->id_server_len);
 140         wpabuf_put_data(req, data->rand_server, EAP_GPSK_RAND_LEN);
 141         wpabuf_put_be16(req,
 142                         data->csuite_count * sizeof(struct eap_gpsk_csuite));
 143         wpabuf_put_data(req, data->csuite_list,
 144                         data->csuite_count * sizeof(struct eap_gpsk_csuite));
 145
 146         return req;
 147 }
 148
 149
 150 static struct wpabuf * eap_gpsk_build_gpsk_3(struct eap_sm *sm,
 151                                              struct eap_gpsk_data *data, u8 id)
 152 {
 153         u8 *pos, *start;
 154         size_t len, miclen;
 155         struct eap_gpsk_csuite *csuite;
 156         struct wpabuf *req;
 157
 158         wpa_printf(MSG_DEBUG, "EAP-GPSK: Request/GPSK-3");
 159
 160         miclen = eap_gpsk_mic_len(data->vendor, data->specifier);
 161         len = 1 + 2 * EAP_GPSK_RAND_LEN + 2 + data->id_server_len +
 162                 sizeof(struct eap_gpsk_csuite) + 2 + miclen;
 163         req = eap_msg_alloc(EAP_VENDOR_IETF, EAP_TYPE_GPSK, len,
 164                             EAP_CODE_REQUEST, id);
 165         if (req == NULL) {
 166                 wpa_printf(MSG_ERROR, "EAP-GPSK: Failed to allocate memory "
 167                            "for request/GPSK-3");
 168                 eap_gpsk_state(data, FAILURE);
 169                 return NULL;
 170         }
 171
 172         wpabuf_put_u8(req, EAP_GPSK_OPCODE_GPSK_3);
 173         start = wpabuf_put(req, 0);
 174
 175         wpabuf_put_data(req, data->rand_peer, EAP_GPSK_RAND_LEN);
 176         wpabuf_put_data(req, data->rand_server, EAP_GPSK_RAND_LEN);
 177         wpabuf_put_be16(req, data->id_server_len);
 178         wpabuf_put_data(req, data->id_server, data->id_server_len);
 179         csuite = wpabuf_put(req, sizeof(*csuite));
 180         WPA_PUT_BE32(csuite->vendor, data->vendor);
 181         WPA_PUT_BE16(csuite->specifier, data->specifier);
 182
 183         /* no PD_Payload_2 */
 184         wpabuf_put_be16(req, 0);
 185
 186         pos = wpabuf_put(req, miclen);
 187         if (eap_gpsk_compute_mic(data->sk, data->sk_len, data->vendor,
 188                                  data->specifier, start, pos - start, pos) < 0)
 189         {
 190                 os_free(req);
 191                 eap_gpsk_state(data, FAILURE);
 192                 return NULL;
 193         }
 194
 195         return req;
 196 }
 197
 198
 199 static struct wpabuf * eap_gpsk_buildReq(struct eap_sm *sm, void *priv, u8 id)
 200 {
 201         struct eap_gpsk_data *data = priv;
 202
 203         switch (data->state) {
 204         case GPSK_1:
 205                 return eap_gpsk_build_gpsk_1(sm, data, id);
 206         case GPSK_3:
 207                 return eap_gpsk_build_gpsk_3(sm, data, id);
 208         default:
 209                 wpa_printf(MSG_DEBUG, "EAP-GPSK: Unknown state %d in buildReq",
 210                            data->state);
 211                 break;
 212         }
 213         return NULL;
 214 }
 215
 216
 217 static Boolean eap_gpsk_check(struct eap_sm *sm, void *priv,
 218                               struct wpabuf *respData)
 219 {
 220         struct eap_gpsk_data *data = priv;
 221         const u8 *pos;
 222         size_t len;
 223
 224         pos = eap_hdr_validate(EAP_VENDOR_IETF, EAP_TYPE_GPSK, respData, &len);
 225         if (pos == NULL || len < 1) {
 226                 wpa_printf(MSG_INFO, "EAP-GPSK: Invalid frame");
 227                 return TRUE;
 228         }
 229
 230         wpa_printf(MSG_DEBUG, "EAP-GPSK: Received frame: opcode=%d", *pos);
 231
 232         if (data->state == GPSK_1 && *pos == EAP_GPSK_OPCODE_GPSK_2)
 233                 return FALSE;
 234
 235         if (data->state == GPSK_3 && *pos == EAP_GPSK_OPCODE_GPSK_4)
 236                 return FALSE;
 237
 238         wpa_printf(MSG_INFO, "EAP-GPSK: Unexpected opcode=%d in state=%d",
 239                    *pos, data->state);
 240
 241         return TRUE;
 242 }
 243
 244
 245 static void eap_gpsk_process_gpsk_2(struct eap_sm *sm,
 246                                     struct eap_gpsk_data *data,
 247                                     const u8 *payload, size_t payloadlen)
 248 {
 249         const u8 *pos, *end;
 250         u16 alen;
 251         const struct eap_gpsk_csuite *csuite;
 252         size_t i, miclen;
 253         u8 mic[EAP_GPSK_MAX_MIC_LEN];
 254
 255         if (data->state != GPSK_1)
 256                 return;
 257
 258         wpa_printf(MSG_DEBUG, "EAP-GPSK: Received Response/GPSK-2");
 259
 260         pos = payload;
 261         end = payload + payloadlen;
 262
 263         if (end - pos < 2) {
 264                 wpa_printf(MSG_DEBUG, "EAP-GPSK: Too short message for "
 265                            "ID_Peer length");
 266                 eap_gpsk_state(data, FAILURE);
 267                 return;
 268         }
 269         alen = WPA_GET_BE16(pos);
 270         pos += 2;
 271         if (end - pos < alen) {
 272                 wpa_printf(MSG_DEBUG, "EAP-GPSK: Too short message for "
 273                            "ID_Peer");
 274                 eap_gpsk_state(data, FAILURE);
 275                 return;
 276         }
 277         os_free(data->id_peer);
 278         data->id_peer = os_malloc(alen);
 279         if (data->id_peer == NULL) {
 280                 wpa_printf(MSG_DEBUG, "EAP-GPSK: Not enough memory to store "
 281                            "%d-octet ID_Peer", alen);
 282                 return;
 283         }
 284         os_memcpy(data->id_peer, pos, alen);
 285         data->id_peer_len = alen;
 286         wpa_hexdump_ascii(MSG_DEBUG, "EAP-GPSK: ID_Peer",
 287                           data->id_peer, data->id_peer_len);
 288         pos += alen;
 289
 290         if (end - pos < 2) {
 291                 wpa_printf(MSG_DEBUG, "EAP-GPSK: Too short message for "
 292                            "ID_Server length");
 293                 eap_gpsk_state(data, FAILURE);
 294                 return;
 295         }
 296         alen = WPA_GET_BE16(pos);
 297         pos += 2;
 298         if (end - pos < alen) {
 299                 wpa_printf(MSG_DEBUG, "EAP-GPSK: Too short message for "
 300                            "ID_Server");
 301                 eap_gpsk_state(data, FAILURE);
 302                 return;
 303         }
 304         if (alen != data->id_server_len ||
 305             os_memcmp(pos, data->id_server, alen) != 0) {
 306                 wpa_printf(MSG_DEBUG, "EAP-GPSK: ID_Server in GPSK-1 and "
 307                            "GPSK-2 did not match");
 308                 eap_gpsk_state(data, FAILURE);
 309                 return;
 310         }
 311         pos += alen;
 312
 313         if (end - pos < EAP_GPSK_RAND_LEN) {
 314                 wpa_printf(MSG_DEBUG, "EAP-GPSK: Too short message for "
 315                            "RAND_Peer");
 316                 eap_gpsk_state(data, FAILURE);
 317                 return;
 318         }
 319         os_memcpy(data->rand_peer, pos, EAP_GPSK_RAND_LEN);
 320         wpa_hexdump(MSG_DEBUG, "EAP-GPSK: RAND_Peer",
 321                     data->rand_peer, EAP_GPSK_RAND_LEN);
 322         pos += EAP_GPSK_RAND_LEN;
 323
 324         if (end - pos < EAP_GPSK_RAND_LEN) {
 325                 wpa_printf(MSG_DEBUG, "EAP-GPSK: Too short message for "
 326                            "RAND_Server");
 327                 eap_gpsk_state(data, FAILURE);
 328                 return;
 329         }
 330         if (os_memcmp(data->rand_server, pos, EAP_GPSK_RAND_LEN) != 0) {
 331                 wpa_printf(MSG_DEBUG, "EAP-GPSK: RAND_Server in GPSK-1 and "
 332                            "GPSK-2 did not match");
 333                 wpa_hexdump(MSG_DEBUG, "EAP-GPSK: RAND_Server in GPSK-1",
 334                             data->rand_server, EAP_GPSK_RAND_LEN);
 335                 wpa_hexdump(MSG_DEBUG, "EAP-GPSK: RAND_Server in GPSK-2",
 336                             pos, EAP_GPSK_RAND_LEN);
 337                 eap_gpsk_state(data, FAILURE);
 338                 return;
 339         }
 340         pos += EAP_GPSK_RAND_LEN;
 341
 342         if (end - pos < 2) {
 343                 wpa_printf(MSG_DEBUG, "EAP-GPSK: Too short message for "
 344                            "CSuite_List length");
 345                 eap_gpsk_state(data, FAILURE);
 346                 return;
 347         }
 348         alen = WPA_GET_BE16(pos);
 349         pos += 2;
 350         if (end - pos < alen) {
 351                 wpa_printf(MSG_DEBUG, "EAP-GPSK: Too short message for "
 352                            "CSuite_List");
 353                 eap_gpsk_state(data, FAILURE);
 354                 return;
 355         }
 356         if (alen != data->csuite_count * sizeof(struct eap_gpsk_csuite) ||
 357             os_memcmp(pos, data->csuite_list, alen) != 0) {
 358                 wpa_printf(MSG_DEBUG, "EAP-GPSK: CSuite_List in GPSK-1 and "
 359                            "GPSK-2 did not match");
 360                 eap_gpsk_state(data, FAILURE);
 361                 return;
 362         }
 363         pos += alen;
 364
 365         if (end - pos < (int) sizeof(*csuite)) {
 366                 wpa_printf(MSG_DEBUG, "EAP-GPSK: Too short message for "
 367                            "CSuite_Sel");
 368                 eap_gpsk_state(data, FAILURE);
 369                 return;
 370         }
 371         csuite = (const struct eap_gpsk_csuite *) pos;
 372         for (i = 0; i < data->csuite_count; i++) {
 373                 if (os_memcmp(csuite, &data->csuite_list[i], sizeof(*csuite))
 374                     == 0)
 375                         break;
 376         }
 377         if (i == data->csuite_count) {
 378                 wpa_printf(MSG_DEBUG, "EAP-GPSK: Peer selected unsupported "
 379                            "ciphersuite %d:%d",
 380                            WPA_GET_BE32(csuite->vendor),
 381                            WPA_GET_BE16(csuite->specifier));
 382                 eap_gpsk_state(data, FAILURE);
 383                 return;
 384         }
 385         data->vendor = WPA_GET_BE32(csuite->vendor);
 386         data->specifier = WPA_GET_BE16(csuite->specifier);
 387         wpa_printf(MSG_DEBUG, "EAP-GPSK: CSuite_Sel %d:%d",
 388                    data->vendor, data->specifier);
 389         pos += sizeof(*csuite);
 390
 391         if (end - pos < 2) {
 392                 wpa_printf(MSG_DEBUG, "EAP-GPSK: Too short message for "
 393                            "PD_Payload_1 length");
 394                 eap_gpsk_state(data, FAILURE);
 395                 return;
 396         }
 397         alen = WPA_GET_BE16(pos);
 398         pos += 2;
 399         if (end - pos < alen) {
 400                 wpa_printf(MSG_DEBUG, "EAP-GPSK: Too short message for "
 401                            "PD_Payload_1");
 402                 eap_gpsk_state(data, FAILURE);
 403                 return;
 404         }
 405         wpa_hexdump(MSG_DEBUG, "EAP-GPSK: PD_Payload_1", pos, alen);
 406         pos += alen;
 407
 408         if (sm->user == NULL || sm->user->password == NULL) {
 409                 wpa_printf(MSG_INFO, "EAP-GPSK: No PSK/password configured "
 410                            "for the user");
 411                 eap_gpsk_state(data, FAILURE);
 412                 return;
 413         }
 414
 415         if (eap_gpsk_derive_keys(sm->user->password, sm->user->password_len,
 416                                  data->vendor, data->specifier,
 417                                  data->rand_peer, data->rand_server,
 418                                  data->id_peer, data->id_peer_len,
 419                                  data->id_server, data->id_server_len,
 420                                  data->msk, data->emsk,
 421                                  data->sk, &data->sk_len,
 422                                  data->pk, &data->pk_len) < 0) {
 423                 wpa_printf(MSG_DEBUG, "EAP-GPSK: Failed to derive keys");
 424                 eap_gpsk_state(data, FAILURE);
 425                 return;
 426         }
 427
 428         miclen = eap_gpsk_mic_len(data->vendor, data->specifier);
 429         if (end - pos < (int) miclen) {
 430                 wpa_printf(MSG_DEBUG, "EAP-GPSK: Message too short for MIC "
 431                            "(left=%lu miclen=%lu)",
 432                            (unsigned long) (end - pos),
 433                            (unsigned long) miclen);
 434                 eap_gpsk_state(data, FAILURE);
 435                 return;
 436         }
 437         if (eap_gpsk_compute_mic(data->sk, data->sk_len, data->vendor,
 438                                  data->specifier, payload, pos - payload, mic)
 439             < 0) {
 440                 wpa_printf(MSG_DEBUG, "EAP-GPSK: Failed to compute MIC");
 441                 eap_gpsk_state(data, FAILURE);
 442                 return;
 443         }
 444         if (os_memcmp(mic, pos, miclen) != 0) {
 445                 wpa_printf(MSG_INFO, "EAP-GPSK: Incorrect MIC in GPSK-2");
 446                 wpa_hexdump(MSG_DEBUG, "EAP-GPSK: Received MIC", pos, miclen);
 447                 wpa_hexdump(MSG_DEBUG, "EAP-GPSK: Computed MIC", mic, miclen);
 448                 eap_gpsk_state(data, FAILURE);
 449                 return;
 450         }
 451         pos += miclen;
 452
 453         if (pos != end) {
 454                 wpa_printf(MSG_DEBUG, "EAP-GPSK: Ignored %lu bytes of extra "
 455                            "data in the end of GPSK-2",
 456                            (unsigned long) (end - pos));
 457         }
 458
 459         eap_gpsk_state(data, GPSK_3);
 460 }
 461
 462
 463 static void eap_gpsk_process_gpsk_4(struct eap_sm *sm,
 464                                     struct eap_gpsk_data *data,
 465                                     const u8 *payload, size_t payloadlen)
 466 {
 467         const u8 *pos, *end;
 468         u16 alen;
 469         size_t miclen;
 470         u8 mic[EAP_GPSK_MAX_MIC_LEN];
 471
 472         if (data->state != GPSK_3)
 473                 return;
 474
 475         wpa_printf(MSG_DEBUG, "EAP-GPSK: Received Response/GPSK-4");
 476
 477         pos = payload;
 478         end = payload + payloadlen;
 479
 480         if (end - pos < 2) {
 481                 wpa_printf(MSG_DEBUG, "EAP-GPSK: Too short message for "
 482                            "PD_Payload_1 length");
 483                 eap_gpsk_state(data, FAILURE);
 484                 return;
 485         }
 486         alen = WPA_GET_BE16(pos);
 487         pos += 2;
 488         if (end - pos < alen) {
 489                 wpa_printf(MSG_DEBUG, "EAP-GPSK: Too short message for "
 490                            "PD_Payload_1");
 491                 eap_gpsk_state(data, FAILURE);
 492                 return;
 493         }
 494         wpa_hexdump(MSG_DEBUG, "EAP-GPSK: PD_Payload_1", pos, alen);
 495         pos += alen;
 496
 497         miclen = eap_gpsk_mic_len(data->vendor, data->specifier);
 498         if (end - pos < (int) miclen) {
 499                 wpa_printf(MSG_DEBUG, "EAP-GPSK: Message too short for MIC "
 500                            "(left=%lu miclen=%lu)",
 501                            (unsigned long) (end - pos),
 502                            (unsigned long) miclen);
 503                 eap_gpsk_state(data, FAILURE);
 504                 return;
 505         }
 506         if (eap_gpsk_compute_mic(data->sk, data->sk_len, data->vendor,
 507                                  data->specifier, payload, pos - payload, mic)
 508             < 0) {
 509                 wpa_printf(MSG_DEBUG, "EAP-GPSK: Failed to compute MIC");
 510                 eap_gpsk_state(data, FAILURE);
 511                 return;
 512         }
 513         if (os_memcmp(mic, pos, miclen) != 0) {
 514                 wpa_printf(MSG_INFO, "EAP-GPSK: Incorrect MIC in GPSK-4");
 515                 wpa_hexdump(MSG_DEBUG, "EAP-GPSK: Received MIC", pos, miclen);
 516                 wpa_hexdump(MSG_DEBUG, "EAP-GPSK: Computed MIC", mic, miclen);
 517                 eap_gpsk_state(data, FAILURE);
 518                 return;
 519         }
 520         pos += miclen;
 521
 522         if (pos != end) {
 523                 wpa_printf(MSG_DEBUG, "EAP-GPSK: Ignored %lu bytes of extra "
 524                            "data in the end of GPSK-4",
 525                            (unsigned long) (end - pos));
 526         }
 527
 528         eap_gpsk_state(data, SUCCESS);
 529 }
 530
 531
 532 static void eap_gpsk_process(struct eap_sm *sm, void *priv,
 533                              struct wpabuf *respData)
 534 {
 535         struct eap_gpsk_data *data = priv;
 536         const u8 *pos;
 537         size_t len;
 538
 539         pos = eap_hdr_validate(EAP_VENDOR_IETF, EAP_TYPE_GPSK, respData, &len);
 540         if (pos == NULL || len < 1)
 541                 return;
 542
 543         switch (*pos) {
 544         case EAP_GPSK_OPCODE_GPSK_2:
 545                 eap_gpsk_process_gpsk_2(sm, data, pos + 1, len - 1);
 546                 break;
 547         case EAP_GPSK_OPCODE_GPSK_4:
 548                 eap_gpsk_process_gpsk_4(sm, data, pos + 1, len - 1);
 549                 break;
 550         }
 551 }
 552
 553
 554 static Boolean eap_gpsk_isDone(struct eap_sm *sm, void *priv)
 555 {
 556         struct eap_gpsk_data *data = priv;
 557         return data->state == SUCCESS || data->state == FAILURE;
 558 }
 559
 560
 561 static u8 * eap_gpsk_getKey(struct eap_sm *sm, void *priv, size_t *len)
 562 {
 563         struct eap_gpsk_data *data = priv;
 564         u8 *key;
 565
 566         if (data->state != SUCCESS)
 567                 return NULL;
 568
 569         key = os_malloc(EAP_MSK_LEN);
 570         if (key == NULL)
 571                 return NULL;
 572         os_memcpy(key, data->msk, EAP_MSK_LEN);
 573         *len = EAP_MSK_LEN;
 574
 575         return key;
 576 }
 577
 578
 579 static u8 * eap_gpsk_get_emsk(struct eap_sm *sm, void *priv, size_t *len)
 580 {
 581         struct eap_gpsk_data *data = priv;
 582         u8 *key;
 583
 584         if (data->state != SUCCESS)
 585                 return NULL;
 586
 587         key = os_malloc(EAP_EMSK_LEN);
 588         if (key == NULL)
 589                 return NULL;
 590         os_memcpy(key, data->emsk, EAP_EMSK_LEN);
 591         *len = EAP_EMSK_LEN;
 592
 593         return key;
 594 }
 595
 596
 597 static Boolean eap_gpsk_isSuccess(struct eap_sm *sm, void *priv)
 598 {
 599         struct eap_gpsk_data *data = priv;
 600         return data->state == SUCCESS;
 601 }
 602
 603
 604 int eap_server_gpsk_register(void)
 605 {
 606         struct eap_method *eap;
 607         int ret;
 608
 609         eap = eap_server_method_alloc(EAP_SERVER_METHOD_INTERFACE_VERSION,
 610                                       EAP_VENDOR_IETF, EAP_TYPE_GPSK, "GPSK");
 611         if (eap == NULL)
 612                 return -1;
 613
 614         eap->init = eap_gpsk_init;
 615         eap->reset = eap_gpsk_reset;
 616         eap->buildReq = eap_gpsk_buildReq;
 617         eap->check = eap_gpsk_check;
 618         eap->process = eap_gpsk_process;
 619         eap->isDone = eap_gpsk_isDone;
 620         eap->getKey = eap_gpsk_getKey;
 621         eap->isSuccess = eap_gpsk_isSuccess;
 622         eap->get_emsk = eap_gpsk_get_emsk;
 623
 624         ret = eap_server_method_register(eap);
 625         if (ret)
 626                 eap_server_method_free(eap);
 627         return ret;
 628 }