contrib/hostapd/src/rsn_supp/wpa_ie.c

   1 /*
   2  * wpa_supplicant - WPA/RSN IE and KDE processing
   3  * Copyright (c) 2003-2008, 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 "wpa.h"
  13 #include "pmksa_cache.h"
  14 #include "common/ieee802_11_defs.h"
  15 #include "wpa_i.h"
  16 #include "wpa_ie.h"
  17
  18
  19 /**
  20  * wpa_parse_wpa_ie - Parse WPA/RSN IE
  21  * @wpa_ie: Pointer to WPA or RSN IE
  22  * @wpa_ie_len: Length of the WPA/RSN IE
  23  * @data: Pointer to data area for parsing results
  24  * Returns: 0 on success, -1 on failure
  25  *
  26  * Parse the contents of WPA or RSN IE and write the parsed data into data.
  27  */
  28 int wpa_parse_wpa_ie(const u8 *wpa_ie, size_t wpa_ie_len,
  29                      struct wpa_ie_data *data)
  30 {
  31         if (wpa_ie_len >= 1 && wpa_ie[0] == WLAN_EID_RSN)
  32                 return wpa_parse_wpa_ie_rsn(wpa_ie, wpa_ie_len, data);
  33         else
  34                 return wpa_parse_wpa_ie_wpa(wpa_ie, wpa_ie_len, data);
  35 }
  36
  37
  38 static int wpa_gen_wpa_ie_wpa(u8 *wpa_ie, size_t wpa_ie_len,
  39                               int pairwise_cipher, int group_cipher,
  40                               int key_mgmt)
  41 {
  42         u8 *pos;
  43         struct wpa_ie_hdr *hdr;
  44         u32 suite;
  45
  46         if (wpa_ie_len < sizeof(*hdr) + WPA_SELECTOR_LEN +
  47             2 + WPA_SELECTOR_LEN + 2 + WPA_SELECTOR_LEN)
  48                 return -1;
  49
  50         hdr = (struct wpa_ie_hdr *) wpa_ie;
  51         hdr->elem_id = WLAN_EID_VENDOR_SPECIFIC;
  52         RSN_SELECTOR_PUT(hdr->oui, WPA_OUI_TYPE);
  53         WPA_PUT_LE16(hdr->version, WPA_VERSION);
  54         pos = (u8 *) (hdr + 1);
  55
  56         suite = wpa_cipher_to_suite(WPA_PROTO_WPA, group_cipher);
  57         if (suite == 0) {
  58                 wpa_printf(MSG_WARNING, "Invalid group cipher (%d).",
  59                            group_cipher);
  60                 return -1;
  61         }
  62         RSN_SELECTOR_PUT(pos, suite);
  63         pos += WPA_SELECTOR_LEN;
  64
  65         *pos++ = 1;
  66         *pos++ = 0;
  67         suite = wpa_cipher_to_suite(WPA_PROTO_WPA, pairwise_cipher);
  68         if (suite == 0 ||
  69             (!wpa_cipher_valid_pairwise(pairwise_cipher) &&
  70              pairwise_cipher != WPA_CIPHER_NONE)) {
  71                 wpa_printf(MSG_WARNING, "Invalid pairwise cipher (%d).",
  72                            pairwise_cipher);
  73                 return -1;
  74         }
  75         RSN_SELECTOR_PUT(pos, suite);
  76         pos += WPA_SELECTOR_LEN;
  77
  78         *pos++ = 1;
  79         *pos++ = 0;
  80         if (key_mgmt == WPA_KEY_MGMT_IEEE8021X) {
  81                 RSN_SELECTOR_PUT(pos, WPA_AUTH_KEY_MGMT_UNSPEC_802_1X);
  82         } else if (key_mgmt == WPA_KEY_MGMT_PSK) {
  83                 RSN_SELECTOR_PUT(pos, WPA_AUTH_KEY_MGMT_PSK_OVER_802_1X);
  84         } else if (key_mgmt == WPA_KEY_MGMT_WPA_NONE) {
  85                 RSN_SELECTOR_PUT(pos, WPA_AUTH_KEY_MGMT_NONE);
  86         } else if (key_mgmt == WPA_KEY_MGMT_CCKM) {
  87                 RSN_SELECTOR_PUT(pos, WPA_AUTH_KEY_MGMT_CCKM);
  88         } else {
  89                 wpa_printf(MSG_WARNING, "Invalid key management type (%d).",
  90                            key_mgmt);
  91                 return -1;
  92         }
  93         pos += WPA_SELECTOR_LEN;
  94
  95         /* WPA Capabilities; use defaults, so no need to include it */
  96
  97         hdr->len = (pos - wpa_ie) - 2;
  98
  99         WPA_ASSERT((size_t) (pos - wpa_ie) <= wpa_ie_len);
 100
 101         return pos - wpa_ie;
 102 }
 103
 104
 105 static int wpa_gen_wpa_ie_rsn(u8 *rsn_ie, size_t rsn_ie_len,
 106                               int pairwise_cipher, int group_cipher,
 107                               int key_mgmt, int mgmt_group_cipher,
 108                               struct wpa_sm *sm)
 109 {
 110         u8 *pos;
 111         struct rsn_ie_hdr *hdr;
 112         u16 capab;
 113         u32 suite;
 114
 115         if (rsn_ie_len < sizeof(*hdr) + RSN_SELECTOR_LEN +
 116             2 + RSN_SELECTOR_LEN + 2 + RSN_SELECTOR_LEN + 2 +
 117             (sm->cur_pmksa ? 2 + PMKID_LEN : 0)) {
 118                 wpa_printf(MSG_DEBUG, "RSN: Too short IE buffer (%lu bytes)",
 119                            (unsigned long) rsn_ie_len);
 120                 return -1;
 121         }
 122
 123         hdr = (struct rsn_ie_hdr *) rsn_ie;
 124         hdr->elem_id = WLAN_EID_RSN;
 125         WPA_PUT_LE16(hdr->version, RSN_VERSION);
 126         pos = (u8 *) (hdr + 1);
 127
 128         suite = wpa_cipher_to_suite(WPA_PROTO_RSN, group_cipher);
 129         if (suite == 0) {
 130                 wpa_printf(MSG_WARNING, "Invalid group cipher (%d).",
 131                            group_cipher);
 132                 return -1;
 133         }
 134         RSN_SELECTOR_PUT(pos, suite);
 135         pos += RSN_SELECTOR_LEN;
 136
 137         *pos++ = 1;
 138         *pos++ = 0;
 139         suite = wpa_cipher_to_suite(WPA_PROTO_RSN, pairwise_cipher);
 140         if (suite == 0 ||
 141             (!wpa_cipher_valid_pairwise(pairwise_cipher) &&
 142              pairwise_cipher != WPA_CIPHER_NONE)) {
 143                 wpa_printf(MSG_WARNING, "Invalid pairwise cipher (%d).",
 144                            pairwise_cipher);
 145                 return -1;
 146         }
 147         RSN_SELECTOR_PUT(pos, suite);
 148         pos += RSN_SELECTOR_LEN;
 149
 150         *pos++ = 1;
 151         *pos++ = 0;
 152         if (key_mgmt == WPA_KEY_MGMT_IEEE8021X) {
 153                 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_UNSPEC_802_1X);
 154         } else if (key_mgmt == WPA_KEY_MGMT_PSK) {
 155                 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_PSK_OVER_802_1X);
 156         } else if (key_mgmt == WPA_KEY_MGMT_CCKM) {
 157                 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_CCKM);
 158 #ifdef CONFIG_IEEE80211R
 159         } else if (key_mgmt == WPA_KEY_MGMT_FT_IEEE8021X) {
 160                 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_FT_802_1X);
 161         } else if (key_mgmt == WPA_KEY_MGMT_FT_PSK) {
 162                 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_FT_PSK);
 163 #endif /* CONFIG_IEEE80211R */
 164 #ifdef CONFIG_IEEE80211W
 165         } else if (key_mgmt == WPA_KEY_MGMT_IEEE8021X_SHA256) {
 166                 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_802_1X_SHA256);
 167         } else if (key_mgmt == WPA_KEY_MGMT_PSK_SHA256) {
 168                 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_PSK_SHA256);
 169 #endif /* CONFIG_IEEE80211W */
 170 #ifdef CONFIG_SAE
 171         } else if (key_mgmt == WPA_KEY_MGMT_SAE) {
 172                 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_SAE);
 173         } else if (key_mgmt == WPA_KEY_MGMT_FT_SAE) {
 174                 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_FT_SAE);
 175 #endif /* CONFIG_SAE */
 176         } else {
 177                 wpa_printf(MSG_WARNING, "Invalid key management type (%d).",
 178                            key_mgmt);
 179                 return -1;
 180         }
 181         pos += RSN_SELECTOR_LEN;
 182
 183         /* RSN Capabilities */
 184         capab = 0;
 185 #ifdef CONFIG_IEEE80211W
 186         if (sm->mfp)
 187                 capab |= WPA_CAPABILITY_MFPC;
 188         if (sm->mfp == 2)
 189                 capab |= WPA_CAPABILITY_MFPR;
 190 #endif /* CONFIG_IEEE80211W */
 191         WPA_PUT_LE16(pos, capab);
 192         pos += 2;
 193
 194         if (sm->cur_pmksa) {
 195                 /* PMKID Count (2 octets, little endian) */
 196                 *pos++ = 1;
 197                 *pos++ = 0;
 198                 /* PMKID */
 199                 os_memcpy(pos, sm->cur_pmksa->pmkid, PMKID_LEN);
 200                 pos += PMKID_LEN;
 201         }
 202
 203 #ifdef CONFIG_IEEE80211W
 204         if (mgmt_group_cipher == WPA_CIPHER_AES_128_CMAC) {
 205                 if (!sm->cur_pmksa) {
 206                         /* PMKID Count */
 207                         WPA_PUT_LE16(pos, 0);
 208                         pos += 2;
 209                 }
 210
 211                 /* Management Group Cipher Suite */
 212                 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_AES_128_CMAC);
 213                 pos += RSN_SELECTOR_LEN;
 214         }
 215 #endif /* CONFIG_IEEE80211W */
 216
 217         hdr->len = (pos - rsn_ie) - 2;
 218
 219         WPA_ASSERT((size_t) (pos - rsn_ie) <= rsn_ie_len);
 220
 221         return pos - rsn_ie;
 222 }
 223
 224
 225 /**
 226  * wpa_gen_wpa_ie - Generate WPA/RSN IE based on current security policy
 227  * @sm: Pointer to WPA state machine data from wpa_sm_init()
 228  * @wpa_ie: Pointer to memory area for the generated WPA/RSN IE
 229  * @wpa_ie_len: Maximum length of the generated WPA/RSN IE
 230  * Returns: Length of the generated WPA/RSN IE or -1 on failure
 231  */
 232 int wpa_gen_wpa_ie(struct wpa_sm *sm, u8 *wpa_ie, size_t wpa_ie_len)
 233 {
 234         if (sm->proto == WPA_PROTO_RSN)
 235                 return wpa_gen_wpa_ie_rsn(wpa_ie, wpa_ie_len,
 236                                           sm->pairwise_cipher,
 237                                           sm->group_cipher,
 238                                           sm->key_mgmt, sm->mgmt_group_cipher,
 239                                           sm);
 240         else
 241                 return wpa_gen_wpa_ie_wpa(wpa_ie, wpa_ie_len,
 242                                           sm->pairwise_cipher,
 243                                           sm->group_cipher,
 244                                           sm->key_mgmt);
 245 }
 246
 247
 248 /**
 249  * wpa_parse_generic - Parse EAPOL-Key Key Data Generic IEs
 250  * @pos: Pointer to the IE header
 251  * @end: Pointer to the end of the Key Data buffer
 252  * @ie: Pointer to parsed IE data
 253  * Returns: 0 on success, 1 if end mark is found, -1 on failure
 254  */
 255 static int wpa_parse_generic(const u8 *pos, const u8 *end,
 256                              struct wpa_eapol_ie_parse *ie)
 257 {
 258         if (pos[1] == 0)
 259                 return 1;
 260
 261         if (pos[1] >= 6 &&
 262             RSN_SELECTOR_GET(pos + 2) == WPA_OUI_TYPE &&
 263             pos[2 + WPA_SELECTOR_LEN] == 1 &&
 264             pos[2 + WPA_SELECTOR_LEN + 1] == 0) {
 265                 ie->wpa_ie = pos;
 266                 ie->wpa_ie_len = pos[1] + 2;
 267                 wpa_hexdump(MSG_DEBUG, "WPA: WPA IE in EAPOL-Key",
 268                             ie->wpa_ie, ie->wpa_ie_len);
 269                 return 0;
 270         }
 271
 272         if (pos + 1 + RSN_SELECTOR_LEN < end &&
 273             pos[1] >= RSN_SELECTOR_LEN + PMKID_LEN &&
 274             RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_PMKID) {
 275                 ie->pmkid = pos + 2 + RSN_SELECTOR_LEN;
 276                 wpa_hexdump(MSG_DEBUG, "WPA: PMKID in EAPOL-Key",
 277                             pos, pos[1] + 2);
 278                 return 0;
 279         }
 280
 281         if (pos[1] > RSN_SELECTOR_LEN + 2 &&
 282             RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_GROUPKEY) {
 283                 ie->gtk = pos + 2 + RSN_SELECTOR_LEN;
 284                 ie->gtk_len = pos[1] - RSN_SELECTOR_LEN;
 285                 wpa_hexdump_key(MSG_DEBUG, "WPA: GTK in EAPOL-Key",
 286                                 pos, pos[1] + 2);
 287                 return 0;
 288         }
 289
 290         if (pos[1] > RSN_SELECTOR_LEN + 2 &&
 291             RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_MAC_ADDR) {
 292                 ie->mac_addr = pos + 2 + RSN_SELECTOR_LEN;
 293                 ie->mac_addr_len = pos[1] - RSN_SELECTOR_LEN;
 294                 wpa_hexdump(MSG_DEBUG, "WPA: MAC Address in EAPOL-Key",
 295                             pos, pos[1] + 2);
 296                 return 0;
 297         }
 298
 299 #ifdef CONFIG_PEERKEY
 300         if (pos[1] > RSN_SELECTOR_LEN + 2 &&
 301             RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_SMK) {
 302                 ie->smk = pos + 2 + RSN_SELECTOR_LEN;
 303                 ie->smk_len = pos[1] - RSN_SELECTOR_LEN;
 304                 wpa_hexdump_key(MSG_DEBUG, "WPA: SMK in EAPOL-Key",
 305                                 pos, pos[1] + 2);
 306                 return 0;
 307         }
 308
 309         if (pos[1] > RSN_SELECTOR_LEN + 2 &&
 310             RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_NONCE) {
 311                 ie->nonce = pos + 2 + RSN_SELECTOR_LEN;
 312                 ie->nonce_len = pos[1] - RSN_SELECTOR_LEN;
 313                 wpa_hexdump(MSG_DEBUG, "WPA: Nonce in EAPOL-Key",
 314                             pos, pos[1] + 2);
 315                 return 0;
 316         }
 317
 318         if (pos[1] > RSN_SELECTOR_LEN + 2 &&
 319             RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_LIFETIME) {
 320                 ie->lifetime = pos + 2 + RSN_SELECTOR_LEN;
 321                 ie->lifetime_len = pos[1] - RSN_SELECTOR_LEN;
 322                 wpa_hexdump(MSG_DEBUG, "WPA: Lifetime in EAPOL-Key",
 323                             pos, pos[1] + 2);
 324                 return 0;
 325         }
 326
 327         if (pos[1] > RSN_SELECTOR_LEN + 2 &&
 328             RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_ERROR) {
 329                 ie->error = pos + 2 + RSN_SELECTOR_LEN;
 330                 ie->error_len = pos[1] - RSN_SELECTOR_LEN;
 331                 wpa_hexdump(MSG_DEBUG, "WPA: Error in EAPOL-Key",
 332                             pos, pos[1] + 2);
 333                 return 0;
 334         }
 335 #endif /* CONFIG_PEERKEY */
 336
 337 #ifdef CONFIG_IEEE80211W
 338         if (pos[1] > RSN_SELECTOR_LEN + 2 &&
 339             RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_IGTK) {
 340                 ie->igtk = pos + 2 + RSN_SELECTOR_LEN;
 341                 ie->igtk_len = pos[1] - RSN_SELECTOR_LEN;
 342                 wpa_hexdump_key(MSG_DEBUG, "WPA: IGTK in EAPOL-Key",
 343                                 pos, pos[1] + 2);
 344                 return 0;
 345         }
 346 #endif /* CONFIG_IEEE80211W */
 347
 348 #ifdef CONFIG_P2P
 349         if (pos[1] >= RSN_SELECTOR_LEN + 1 &&
 350             RSN_SELECTOR_GET(pos + 2) == WFA_KEY_DATA_IP_ADDR_REQ) {
 351                 ie->ip_addr_req = pos + 2 + RSN_SELECTOR_LEN;
 352                 wpa_hexdump(MSG_DEBUG, "WPA: IP Address Request in EAPOL-Key",
 353                             ie->ip_addr_req, pos[1] - RSN_SELECTOR_LEN);
 354                 return 0;
 355         }
 356
 357         if (pos[1] >= RSN_SELECTOR_LEN + 3 * 4 &&
 358             RSN_SELECTOR_GET(pos + 2) == WFA_KEY_DATA_IP_ADDR_ALLOC) {
 359                 ie->ip_addr_alloc = pos + 2 + RSN_SELECTOR_LEN;
 360                 wpa_hexdump(MSG_DEBUG,
 361                             "WPA: IP Address Allocation in EAPOL-Key",
 362                             ie->ip_addr_alloc, pos[1] - RSN_SELECTOR_LEN);
 363                 return 0;
 364         }
 365 #endif /* CONFIG_P2P */
 366
 367         return 0;
 368 }
 369
 370
 371 /**
 372  * wpa_supplicant_parse_ies - Parse EAPOL-Key Key Data IEs
 373  * @buf: Pointer to the Key Data buffer
 374  * @len: Key Data Length
 375  * @ie: Pointer to parsed IE data
 376  * Returns: 0 on success, -1 on failure
 377  */
 378 int wpa_supplicant_parse_ies(const u8 *buf, size_t len,
 379                              struct wpa_eapol_ie_parse *ie)
 380 {
 381         const u8 *pos, *end;
 382         int ret = 0;
 383
 384         os_memset(ie, 0, sizeof(*ie));
 385         for (pos = buf, end = pos + len; pos + 1 < end; pos += 2 + pos[1]) {
 386                 if (pos[0] == 0xdd &&
 387                     ((pos == buf + len - 1) || pos[1] == 0)) {
 388                         /* Ignore padding */
 389                         break;
 390                 }
 391                 if (pos + 2 + pos[1] > end) {
 392                         wpa_printf(MSG_DEBUG, "WPA: EAPOL-Key Key Data "
 393                                    "underflow (ie=%d len=%d pos=%d)",
 394                                    pos[0], pos[1], (int) (pos - buf));
 395                         wpa_hexdump_key(MSG_DEBUG, "WPA: Key Data",
 396                                         buf, len);
 397                         ret = -1;
 398                         break;
 399                 }
 400                 if (*pos == WLAN_EID_RSN) {
 401                         ie->rsn_ie = pos;
 402                         ie->rsn_ie_len = pos[1] + 2;
 403                         wpa_hexdump(MSG_DEBUG, "WPA: RSN IE in EAPOL-Key",
 404                                     ie->rsn_ie, ie->rsn_ie_len);
 405                 } else if (*pos == WLAN_EID_MOBILITY_DOMAIN) {
 406                         ie->mdie = pos;
 407                         ie->mdie_len = pos[1] + 2;
 408                         wpa_hexdump(MSG_DEBUG, "WPA: MDIE in EAPOL-Key",
 409                                     ie->mdie, ie->mdie_len);
 410                 } else if (*pos == WLAN_EID_FAST_BSS_TRANSITION) {
 411                         ie->ftie = pos;
 412                         ie->ftie_len = pos[1] + 2;
 413                         wpa_hexdump(MSG_DEBUG, "WPA: FTIE in EAPOL-Key",
 414                                     ie->ftie, ie->ftie_len);
 415                 } else if (*pos == WLAN_EID_TIMEOUT_INTERVAL && pos[1] >= 5) {
 416                         if (pos[2] == WLAN_TIMEOUT_REASSOC_DEADLINE) {
 417                                 ie->reassoc_deadline = pos;
 418                                 wpa_hexdump(MSG_DEBUG, "WPA: Reassoc Deadline "
 419                                             "in EAPOL-Key",
 420                                             ie->reassoc_deadline, pos[1] + 2);
 421                         } else if (pos[2] == WLAN_TIMEOUT_KEY_LIFETIME) {
 422                                 ie->key_lifetime = pos;
 423                                 wpa_hexdump(MSG_DEBUG, "WPA: KeyLifetime "
 424                                             "in EAPOL-Key",
 425                                             ie->key_lifetime, pos[1] + 2);
 426                         } else {
 427                                 wpa_hexdump(MSG_DEBUG, "WPA: Unrecognized "
 428                                             "EAPOL-Key Key Data IE",
 429                                             pos, 2 + pos[1]);
 430                         }
 431                 } else if (*pos == WLAN_EID_LINK_ID) {
 432                         if (pos[1] >= 18) {
 433                                 ie->lnkid = pos;
 434                                 ie->lnkid_len = pos[1] + 2;
 435                         }
 436                 } else if (*pos == WLAN_EID_EXT_CAPAB) {
 437                         ie->ext_capab = pos;
 438                         ie->ext_capab_len = pos[1] + 2;
 439                 } else if (*pos == WLAN_EID_SUPP_RATES) {
 440                         ie->supp_rates = pos;
 441                         ie->supp_rates_len = pos[1] + 2;
 442                 } else if (*pos == WLAN_EID_EXT_SUPP_RATES) {
 443                         ie->ext_supp_rates = pos;
 444                         ie->ext_supp_rates_len = pos[1] + 2;
 445                 } else if (*pos == WLAN_EID_HT_CAP) {
 446                         ie->ht_capabilities = pos + 2;
 447                         ie->ht_capabilities_len = pos[1];
 448                 } else if (*pos == WLAN_EID_VHT_AID) {
 449                         if (pos[1] >= 2)
 450                                 ie->aid = WPA_GET_LE16(pos + 2);
 451                 } else if (*pos == WLAN_EID_VHT_CAP) {
 452                         ie->vht_capabilities = pos + 2;
 453                         ie->vht_capabilities_len = pos[1];
 454                 } else if (*pos == WLAN_EID_QOS && pos[1] >= 1) {
 455                         ie->qosinfo = pos[2];
 456                 } else if (*pos == WLAN_EID_SUPPORTED_CHANNELS) {
 457                         ie->supp_channels = pos + 2;
 458                         ie->supp_channels_len = pos[1];
 459                 } else if (*pos == WLAN_EID_SUPPORTED_OPERATING_CLASSES) {
 460                         ie->supp_oper_classes = pos + 2;
 461                         ie->supp_oper_classes_len = pos[1];
 462                 } else if (*pos == WLAN_EID_VENDOR_SPECIFIC) {
 463                         ret = wpa_parse_generic(pos, end, ie);
 464                         if (ret < 0)
 465                                 break;
 466                         if (ret > 0) {
 467                                 ret = 0;
 468                                 break;
 469                         }
 470                 } else {
 471                         wpa_hexdump(MSG_DEBUG, "WPA: Unrecognized EAPOL-Key "
 472                                     "Key Data IE", pos, 2 + pos[1]);
 473                 }
 474         }
 475
 476         return ret;
 477 }