git.oblomov.eu Git - linux-2.6/blob - drivers/staging/rt2860/common/cmm_wpa.c

   1 /*
   2  *************************************************************************
   3  * Ralink Tech Inc.
   4  * 5F., No.36, Taiyuan St., Jhubei City,
   5  * Hsinchu County 302,
   6  * Taiwan, R.O.C.
   7  *
   8  * (c) Copyright 2002-2007, Ralink Technology, Inc.
   9  *
  10  * This program is free software; you can redistribute it and/or modify  *
  11  * it under the terms of the GNU General Public License as published by  *
  12  * the Free Software Foundation; either version 2 of the License, or     *
  13  * (at your option) any later version.                                   *
  14  *                                                                       *
  15  * This program is distributed in the hope that it will be useful,       *
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  18  * GNU General Public License for more details.                          *
  19  *                                                                       *
  20  * You should have received a copy of the GNU General Public License     *
  21  * along with this program; if not, write to the                         *
  22  * Free Software Foundation, Inc.,                                       *
  23  * 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  24  *                                                                       *
  25  *************************************************************************
  26
  27         Module Name:
  28         wpa.c
  29
  30         Abstract:
  31
  32         Revision History:
  33         Who                     When                    What
  34         --------        ----------              ----------------------------------------------
  35         Jan     Lee             03-07-22                Initial
  36         Paul Lin        03-11-28                Modify for supplicant
  37 */
  38 #include "../rt_config.h"
  39 // WPA OUI
  40 UCHAR           OUI_WPA_NONE_AKM[4]             = {0x00, 0x50, 0xF2, 0x00};
  41 UCHAR       OUI_WPA_VERSION[4]      = {0x00, 0x50, 0xF2, 0x01};
  42 UCHAR       OUI_WPA_WEP40[4]      = {0x00, 0x50, 0xF2, 0x01};
  43 UCHAR       OUI_WPA_TKIP[4]     = {0x00, 0x50, 0xF2, 0x02};
  44 UCHAR       OUI_WPA_CCMP[4]     = {0x00, 0x50, 0xF2, 0x04};
  45 UCHAR       OUI_WPA_WEP104[4]      = {0x00, 0x50, 0xF2, 0x05};
  46 UCHAR       OUI_WPA_8021X_AKM[4]        = {0x00, 0x50, 0xF2, 0x01};
  47 UCHAR       OUI_WPA_PSK_AKM[4]      = {0x00, 0x50, 0xF2, 0x02};
  48 // WPA2 OUI
  49 UCHAR       OUI_WPA2_WEP40[4]   = {0x00, 0x0F, 0xAC, 0x01};
  50 UCHAR       OUI_WPA2_TKIP[4]        = {0x00, 0x0F, 0xAC, 0x02};
  51 UCHAR       OUI_WPA2_CCMP[4]        = {0x00, 0x0F, 0xAC, 0x04};
  52 UCHAR       OUI_WPA2_8021X_AKM[4]   = {0x00, 0x0F, 0xAC, 0x01};
  53 UCHAR       OUI_WPA2_PSK_AKM[4]         = {0x00, 0x0F, 0xAC, 0x02};
  54 UCHAR       OUI_WPA2_WEP104[4]   = {0x00, 0x0F, 0xAC, 0x05};
  55 // MSA OUI
  56 UCHAR           OUI_MSA_8021X_AKM[4]    = {0x00, 0x0F, 0xAC, 0x05};             // Not yet final - IEEE 802.11s-D1.06
  57 UCHAR           OUI_MSA_PSK_AKM[4]      = {0x00, 0x0F, 0xAC, 0x06};             // Not yet final - IEEE 802.11s-D1.06
  58
  59 /*
  60         ========================================================================
  61
  62         Routine Description:
  63                 The pseudo-random function(PRF) that hashes various inputs to
  64                 derive a pseudo-random value. To add liveness to the pseudo-random
  65                 value, a nonce should be one of the inputs.
  66
  67                 It is used to generate PTK, GTK or some specific random value.
  68
  69         Arguments:
  70                 UCHAR   *key,           -       the key material for HMAC_SHA1 use
  71                 INT             key_len         -       the length of key
  72                 UCHAR   *prefix         -       a prefix label
  73                 INT             prefix_len      -       the length of the label
  74                 UCHAR   *data           -       a specific data with variable length
  75                 INT             data_len        -       the length of a specific data
  76                 INT             len                     -       the output lenght
  77
  78         Return Value:
  79                 UCHAR   *output         -       the calculated result
  80
  81         Note:
  82                 802.11i-2004    Annex H.3
  83
  84         ========================================================================
  85 */
  86 VOID    PRF(
  87         IN      UCHAR   *key,
  88         IN      INT             key_len,
  89         IN      UCHAR   *prefix,
  90         IN      INT             prefix_len,
  91         IN      UCHAR   *data,
  92         IN      INT             data_len,
  93         OUT     UCHAR   *output,
  94         IN      INT             len)
  95 {
  96         INT             i;
  97     UCHAR   *input;
  98         INT             currentindex = 0;
  99         INT             total_len;
 100
 101         // Allocate memory for input
 102         os_alloc_mem(NULL, (PUCHAR *)&input, 1024);
 103
 104     if (input == NULL)
 105     {
 106         DBGPRINT(RT_DEBUG_ERROR, ("!!!PRF: no memory!!!\n"));
 107         return;
 108     }
 109
 110         // Generate concatenation input
 111         NdisMoveMemory(input, prefix, prefix_len);
 112
 113         // Concatenate a single octet containing 0
 114         input[prefix_len] =     0;
 115
 116         // Concatenate specific data
 117         NdisMoveMemory(&input[prefix_len + 1], data, data_len);
 118         total_len =     prefix_len + 1 + data_len;
 119
 120         // Concatenate a single octet containing 0
 121         // This octet shall be update later
 122         input[total_len] = 0;
 123         total_len++;
 124
 125         // Iterate to calculate the result by hmac-sha-1
 126         // Then concatenate to last result
 127         for     (i = 0; i <     (len + 19) / 20; i++)
 128         {
 129                 HMAC_SHA1(input, total_len,     key, key_len, &output[currentindex]);
 130                 currentindex += 20;
 131
 132                 // update the last octet
 133                 input[total_len - 1]++;
 134         }
 135     os_free_mem(NULL, input);
 136 }
 137
 138 /*
 139         ========================================================================
 140
 141         Routine Description:
 142                 It utilizes PRF-384 or PRF-512 to derive session-specific keys from a PMK.
 143                 It shall be called by 4-way handshake processing.
 144
 145         Arguments:
 146                 pAd     -       pointer to our pAdapter context
 147                 PMK             -       pointer to PMK
 148                 ANonce  -       pointer to ANonce
 149                 AA              -       pointer to Authenticator Address
 150                 SNonce  -       pointer to SNonce
 151                 SA              -       pointer to Supplicant Address
 152                 len             -       indicate the length of PTK (octet)
 153
 154         Return Value:
 155                 Output          pointer to the PTK
 156
 157         Note:
 158                 Refer to IEEE 802.11i-2004 8.5.1.2
 159
 160         ========================================================================
 161 */
 162 VOID WpaCountPTK(
 163         IN      PRTMP_ADAPTER   pAd,
 164         IN      UCHAR   *PMK,
 165         IN      UCHAR   *ANonce,
 166         IN      UCHAR   *AA,
 167         IN      UCHAR   *SNonce,
 168         IN      UCHAR   *SA,
 169         OUT     UCHAR   *output,
 170         IN      UINT    len)
 171 {
 172         UCHAR   concatenation[76];
 173         UINT    CurrPos = 0;
 174         UCHAR   temp[32];
 175         UCHAR   Prefix[] = {'P', 'a', 'i', 'r', 'w', 'i', 's', 'e', ' ', 'k', 'e', 'y', ' ',
 176                                                 'e', 'x', 'p', 'a', 'n', 's', 'i', 'o', 'n'};
 177
 178         // initiate the concatenation input
 179         NdisZeroMemory(temp, sizeof(temp));
 180         NdisZeroMemory(concatenation, 76);
 181
 182         // Get smaller address
 183         if (RTMPCompareMemory(SA, AA, 6) == 1)
 184                 NdisMoveMemory(concatenation, AA, 6);
 185         else
 186                 NdisMoveMemory(concatenation, SA, 6);
 187         CurrPos += 6;
 188
 189         // Get larger address
 190         if (RTMPCompareMemory(SA, AA, 6) == 1)
 191                 NdisMoveMemory(&concatenation[CurrPos], SA, 6);
 192         else
 193                 NdisMoveMemory(&concatenation[CurrPos], AA, 6);
 194
 195         // store the larger mac address for backward compatible of
 196         // ralink proprietary STA-key issue
 197         NdisMoveMemory(temp, &concatenation[CurrPos], MAC_ADDR_LEN);
 198         CurrPos += 6;
 199
 200         // Get smaller Nonce
 201         if (RTMPCompareMemory(ANonce, SNonce, 32) == 0)
 202                 NdisMoveMemory(&concatenation[CurrPos], temp, 32);      // patch for ralink proprietary STA-key issue
 203         else if (RTMPCompareMemory(ANonce, SNonce, 32) == 1)
 204                 NdisMoveMemory(&concatenation[CurrPos], SNonce, 32);
 205         else
 206                 NdisMoveMemory(&concatenation[CurrPos], ANonce, 32);
 207         CurrPos += 32;
 208
 209         // Get larger Nonce
 210         if (RTMPCompareMemory(ANonce, SNonce, 32) == 0)
 211                 NdisMoveMemory(&concatenation[CurrPos], temp, 32);      // patch for ralink proprietary STA-key issue
 212         else if (RTMPCompareMemory(ANonce, SNonce, 32) == 1)
 213                 NdisMoveMemory(&concatenation[CurrPos], ANonce, 32);
 214         else
 215                 NdisMoveMemory(&concatenation[CurrPos], SNonce, 32);
 216         CurrPos += 32;
 217
 218         hex_dump("concatenation=", concatenation, 76);
 219
 220         // Use PRF to generate PTK
 221         PRF(PMK, LEN_MASTER_KEY, Prefix, 22, concatenation, 76, output, len);
 222
 223 }
 224
 225 /*
 226         ========================================================================
 227
 228         Routine Description:
 229                 Generate random number by software.
 230
 231         Arguments:
 232                 pAd             -       pointer to our pAdapter context
 233                 macAddr -       pointer to local MAC address
 234
 235         Return Value:
 236
 237         Note:
 238                 802.1ii-2004  Annex H.5
 239
 240         ========================================================================
 241 */
 242 VOID    GenRandom(
 243         IN      PRTMP_ADAPTER   pAd,
 244         IN      UCHAR                   *macAddr,
 245         OUT     UCHAR                   *random)
 246 {
 247         INT             i, curr;
 248         UCHAR   local[80], KeyCounter[32];
 249         UCHAR   result[80];
 250         ULONG   CurrentTime;
 251         UCHAR   prefix[] = {'I', 'n', 'i', 't', ' ', 'C', 'o', 'u', 'n', 't', 'e', 'r'};
 252
 253         // Zero the related information
 254         NdisZeroMemory(result, 80);
 255         NdisZeroMemory(local, 80);
 256         NdisZeroMemory(KeyCounter, 32);
 257
 258         for     (i = 0; i <     32;     i++)
 259         {
 260                 // copy the local MAC address
 261                 COPY_MAC_ADDR(local, macAddr);
 262                 curr =  MAC_ADDR_LEN;
 263
 264                 // concatenate the current time
 265                 NdisGetSystemUpTime(&CurrentTime);
 266                 NdisMoveMemory(&local[curr],  &CurrentTime,     sizeof(CurrentTime));
 267                 curr += sizeof(CurrentTime);
 268
 269                 // concatenate the last result
 270                 NdisMoveMemory(&local[curr],  result, 32);
 271                 curr += 32;
 272
 273                 // concatenate a variable
 274                 NdisMoveMemory(&local[curr],  &i,  2);
 275                 curr += 2;
 276
 277                 // calculate the result
 278                 PRF(KeyCounter, 32, prefix,12, local, curr, result, 32);
 279         }
 280
 281         NdisMoveMemory(random, result,  32);
 282 }
 283
 284 /*
 285         ========================================================================
 286
 287         Routine Description:
 288                 Build cipher suite in RSN-IE.
 289                 It only shall be called by RTMPMakeRSNIE.
 290
 291         Arguments:
 292                 pAd                     -       pointer to our pAdapter context
 293         ElementID       -       indicate the WPA1 or WPA2
 294         WepStatus       -       indicate the encryption type
 295                 bMixCipher      -       a boolean to indicate the pairwise cipher and group
 296                                                 cipher are the same or not
 297
 298         Return Value:
 299
 300         Note:
 301
 302         ========================================================================
 303 */
 304 static VOID RTMPInsertRsnIeCipher(
 305         IN  PRTMP_ADAPTER   pAd,
 306         IN      UCHAR                   ElementID,
 307         IN      UINT                    WepStatus,
 308         IN      BOOLEAN                 bMixCipher,
 309         IN      UCHAR                   FlexibleCipher,
 310         OUT     PUCHAR                  pRsnIe,
 311         OUT     UCHAR                   *rsn_len)
 312 {
 313         UCHAR   PairwiseCnt;
 314
 315         *rsn_len = 0;
 316
 317         // decide WPA2 or WPA1
 318         if (ElementID == Wpa2Ie)
 319         {
 320                 RSNIE2  *pRsnie_cipher = (RSNIE2*)pRsnIe;
 321
 322                 // Assign the verson as 1
 323                 pRsnie_cipher->version = 1;
 324
 325         switch (WepStatus)
 326         {
 327                 // TKIP mode
 328             case Ndis802_11Encryption2Enabled:
 329                 NdisMoveMemory(pRsnie_cipher->mcast, OUI_WPA2_TKIP, 4);
 330                 pRsnie_cipher->ucount = 1;
 331                 NdisMoveMemory(pRsnie_cipher->ucast[0].oui, OUI_WPA2_TKIP, 4);
 332                 *rsn_len = sizeof(RSNIE2);
 333                 break;
 334
 335                         // AES mode
 336             case Ndis802_11Encryption3Enabled:
 337                                 if (bMixCipher)
 338                                         NdisMoveMemory(pRsnie_cipher->mcast, OUI_WPA2_TKIP, 4);
 339                                 else
 340                                         NdisMoveMemory(pRsnie_cipher->mcast, OUI_WPA2_CCMP, 4);
 341                 pRsnie_cipher->ucount = 1;
 342                 NdisMoveMemory(pRsnie_cipher->ucast[0].oui, OUI_WPA2_CCMP, 4);
 343                 *rsn_len = sizeof(RSNIE2);
 344                 break;
 345
 346                         // TKIP-AES mix mode
 347             case Ndis802_11Encryption4Enabled:
 348                 NdisMoveMemory(pRsnie_cipher->mcast, OUI_WPA2_TKIP, 4);
 349
 350                                 PairwiseCnt = 1;
 351                                 // Insert WPA2 TKIP as the first pairwise cipher
 352                                 if (MIX_CIPHER_WPA2_TKIP_ON(FlexibleCipher))
 353                                 {
 354                         NdisMoveMemory(pRsnie_cipher->ucast[0].oui, OUI_WPA2_TKIP, 4);
 355                                         // Insert WPA2 AES as the secondary pairwise cipher
 356                                         if (MIX_CIPHER_WPA2_AES_ON(FlexibleCipher))
 357                                         {
 358                                 NdisMoveMemory(pRsnie_cipher->ucast[0].oui + 4, OUI_WPA2_CCMP, 4);
 359                                                 PairwiseCnt = 2;
 360                                         }
 361                                 }
 362                                 else
 363                                 {
 364                                         // Insert WPA2 AES as the first pairwise cipher
 365                                         NdisMoveMemory(pRsnie_cipher->ucast[0].oui, OUI_WPA2_CCMP, 4);
 366                                 }
 367
 368                 pRsnie_cipher->ucount = PairwiseCnt;
 369                 *rsn_len = sizeof(RSNIE2) + (4 * (PairwiseCnt - 1));
 370                 break;
 371         }
 372
 373                 if ((pAd->OpMode == OPMODE_STA) &&
 374                         (pAd->StaCfg.GroupCipher != Ndis802_11Encryption2Enabled) &&
 375                         (pAd->StaCfg.GroupCipher != Ndis802_11Encryption3Enabled))
 376                 {
 377                         UINT GroupCipher = pAd->StaCfg.GroupCipher;
 378                         switch(GroupCipher)
 379                         {
 380                                 case Ndis802_11GroupWEP40Enabled:
 381                                         NdisMoveMemory(pRsnie_cipher->mcast, OUI_WPA2_WEP40, 4);
 382                                         break;
 383                                 case Ndis802_11GroupWEP104Enabled:
 384                                         NdisMoveMemory(pRsnie_cipher->mcast, OUI_WPA2_WEP104, 4);
 385                                         break;
 386                         }
 387                 }
 388
 389                 // swap for big-endian platform
 390                 pRsnie_cipher->version = cpu2le16(pRsnie_cipher->version);
 391             pRsnie_cipher->ucount = cpu2le16(pRsnie_cipher->ucount);
 392         }
 393         else
 394         {
 395                 RSNIE   *pRsnie_cipher = (RSNIE*)pRsnIe;
 396
 397                 // Assign OUI and version
 398                 NdisMoveMemory(pRsnie_cipher->oui, OUI_WPA_VERSION, 4);
 399         pRsnie_cipher->version = 1;
 400
 401                 switch (WepStatus)
 402                 {
 403                         // TKIP mode
 404             case Ndis802_11Encryption2Enabled:
 405                 NdisMoveMemory(pRsnie_cipher->mcast, OUI_WPA_TKIP, 4);
 406                 pRsnie_cipher->ucount = 1;
 407                 NdisMoveMemory(pRsnie_cipher->ucast[0].oui, OUI_WPA_TKIP, 4);
 408                 *rsn_len = sizeof(RSNIE);
 409                 break;
 410
 411                         // AES mode
 412             case Ndis802_11Encryption3Enabled:
 413                                 if (bMixCipher)
 414                                         NdisMoveMemory(pRsnie_cipher->mcast, OUI_WPA_TKIP, 4);
 415                                 else
 416                                         NdisMoveMemory(pRsnie_cipher->mcast, OUI_WPA_CCMP, 4);
 417                 pRsnie_cipher->ucount = 1;
 418                 NdisMoveMemory(pRsnie_cipher->ucast[0].oui, OUI_WPA_CCMP, 4);
 419                 *rsn_len = sizeof(RSNIE);
 420                 break;
 421
 422                         // TKIP-AES mix mode
 423             case Ndis802_11Encryption4Enabled:
 424                 NdisMoveMemory(pRsnie_cipher->mcast, OUI_WPA_TKIP, 4);
 425
 426                                 PairwiseCnt = 1;
 427                                 // Insert WPA TKIP as the first pairwise cipher
 428                                 if (MIX_CIPHER_WPA_TKIP_ON(FlexibleCipher))
 429                                 {
 430                         NdisMoveMemory(pRsnie_cipher->ucast[0].oui, OUI_WPA_TKIP, 4);
 431                                         // Insert WPA AES as the secondary pairwise cipher
 432                                         if (MIX_CIPHER_WPA_AES_ON(FlexibleCipher))
 433                                         {
 434                                 NdisMoveMemory(pRsnie_cipher->ucast[0].oui + 4, OUI_WPA_CCMP, 4);
 435                                                 PairwiseCnt = 2;
 436                                         }
 437                                 }
 438                                 else
 439                                 {
 440                                         // Insert WPA AES as the first pairwise cipher
 441                                         NdisMoveMemory(pRsnie_cipher->ucast[0].oui, OUI_WPA_CCMP, 4);
 442                                 }
 443
 444                 pRsnie_cipher->ucount = PairwiseCnt;
 445                 *rsn_len = sizeof(RSNIE) + (4 * (PairwiseCnt - 1));
 446                 break;
 447         }
 448
 449                 if ((pAd->OpMode == OPMODE_STA) &&
 450                         (pAd->StaCfg.GroupCipher != Ndis802_11Encryption2Enabled) &&
 451                         (pAd->StaCfg.GroupCipher != Ndis802_11Encryption3Enabled))
 452                 {
 453                         UINT GroupCipher = pAd->StaCfg.GroupCipher;
 454                         switch(GroupCipher)
 455                         {
 456                                 case Ndis802_11GroupWEP40Enabled:
 457                                         NdisMoveMemory(pRsnie_cipher->mcast, OUI_WPA_WEP40, 4);
 458                                         break;
 459                                 case Ndis802_11GroupWEP104Enabled:
 460                                         NdisMoveMemory(pRsnie_cipher->mcast, OUI_WPA_WEP104, 4);
 461                                         break;
 462                         }
 463                 }
 464
 465                 // swap for big-endian platform
 466                 pRsnie_cipher->version = cpu2le16(pRsnie_cipher->version);
 467             pRsnie_cipher->ucount = cpu2le16(pRsnie_cipher->ucount);
 468         }
 469 }
 470
 471 /*
 472         ========================================================================
 473
 474         Routine Description:
 475                 Build AKM suite in RSN-IE.
 476                 It only shall be called by RTMPMakeRSNIE.
 477
 478         Arguments:
 479                 pAd                     -       pointer to our pAdapter context
 480         ElementID       -       indicate the WPA1 or WPA2
 481         AuthMode        -       indicate the authentication mode
 482                 apidx           -       indicate the interface index
 483
 484         Return Value:
 485
 486         Note:
 487
 488         ========================================================================
 489 */
 490 static VOID RTMPInsertRsnIeAKM(
 491         IN  PRTMP_ADAPTER   pAd,
 492         IN      UCHAR                   ElementID,
 493         IN      UINT                    AuthMode,
 494         IN      UCHAR                   apidx,
 495         OUT     PUCHAR                  pRsnIe,
 496         OUT     UCHAR                   *rsn_len)
 497 {
 498         RSNIE_AUTH              *pRsnie_auth;
 499
 500         pRsnie_auth = (RSNIE_AUTH*)(pRsnIe + (*rsn_len));
 501
 502         // decide WPA2 or WPA1
 503         if (ElementID == Wpa2Ie)
 504         {
 505                 switch (AuthMode)
 506         {
 507             case Ndis802_11AuthModeWPA2:
 508             case Ndis802_11AuthModeWPA1WPA2:
 509                 pRsnie_auth->acount = 1;
 510                         NdisMoveMemory(pRsnie_auth->auth[0].oui, OUI_WPA2_8021X_AKM, 4);
 511                 break;
 512
 513             case Ndis802_11AuthModeWPA2PSK:
 514             case Ndis802_11AuthModeWPA1PSKWPA2PSK:
 515                 pRsnie_auth->acount = 1;
 516                         NdisMoveMemory(pRsnie_auth->auth[0].oui, OUI_WPA2_PSK_AKM, 4);
 517                 break;
 518         }
 519         }
 520         else
 521         {
 522                 switch (AuthMode)
 523         {
 524             case Ndis802_11AuthModeWPA:
 525             case Ndis802_11AuthModeWPA1WPA2:
 526                 pRsnie_auth->acount = 1;
 527                 NdisMoveMemory(pRsnie_auth->auth[0].oui, OUI_WPA_8021X_AKM, 4);
 528                 break;
 529
 530             case Ndis802_11AuthModeWPAPSK:
 531             case Ndis802_11AuthModeWPA1PSKWPA2PSK:
 532                 pRsnie_auth->acount = 1;
 533                 NdisMoveMemory(pRsnie_auth->auth[0].oui, OUI_WPA_PSK_AKM, 4);
 534                 break;
 535
 536                         case Ndis802_11AuthModeWPANone:
 537                 pRsnie_auth->acount = 1;
 538                 NdisMoveMemory(pRsnie_auth->auth[0].oui, OUI_WPA_NONE_AKM, 4);
 539                 break;
 540         }
 541         }
 542
 543         pRsnie_auth->acount = cpu2le16(pRsnie_auth->acount);
 544
 545         (*rsn_len) += sizeof(RSNIE_AUTH);       // update current RSNIE length
 546
 547 }
 548
 549 /*
 550         ========================================================================
 551
 552         Routine Description:
 553                 Build capability in RSN-IE.
 554                 It only shall be called by RTMPMakeRSNIE.
 555
 556         Arguments:
 557                 pAd                     -       pointer to our pAdapter context
 558         ElementID       -       indicate the WPA1 or WPA2
 559                 apidx           -       indicate the interface index
 560
 561         Return Value:
 562
 563         Note:
 564
 565         ========================================================================
 566 */
 567 static VOID RTMPInsertRsnIeCap(
 568         IN  PRTMP_ADAPTER   pAd,
 569         IN      UCHAR                   ElementID,
 570         IN      UCHAR                   apidx,
 571         OUT     PUCHAR                  pRsnIe,
 572         OUT     UCHAR                   *rsn_len)
 573 {
 574         RSN_CAPABILITIES    *pRSN_Cap;
 575
 576         // it could be ignored in WPA1 mode
 577         if (ElementID == WpaIe)
 578                 return;
 579
 580         pRSN_Cap = (RSN_CAPABILITIES*)(pRsnIe + (*rsn_len));
 581
 582
 583         pRSN_Cap->word = cpu2le16(pRSN_Cap->word);
 584
 585         (*rsn_len) += sizeof(RSN_CAPABILITIES); // update current RSNIE length
 586
 587 }
 588
 589
 590 /*
 591         ========================================================================
 592
 593         Routine Description:
 594                 Build RSN IE context. It is not included element-ID and length.
 595
 596         Arguments:
 597                 pAd                     -       pointer to our pAdapter context
 598         AuthMode        -       indicate the authentication mode
 599         WepStatus       -       indicate the encryption type
 600                 apidx           -       indicate the interface index
 601
 602         Return Value:
 603
 604         Note:
 605
 606         ========================================================================
 607 */
 608 VOID RTMPMakeRSNIE(
 609     IN  PRTMP_ADAPTER   pAd,
 610     IN  UINT            AuthMode,
 611     IN  UINT            WepStatus,
 612         IN      UCHAR                   apidx)
 613 {
 614         PUCHAR          pRsnIe = NULL;                  // primary RSNIE
 615         UCHAR           *rsnielen_cur_p = 0;    // the length of the primary RSNIE
 616         UCHAR           *rsnielen_ex_cur_p = 0; // the length of the secondary RSNIE
 617         UCHAR           PrimaryRsnie;
 618         BOOLEAN         bMixCipher = FALSE;     // indicate the pairwise and group cipher are different
 619         UCHAR           p_offset;
 620         WPA_MIX_PAIR_CIPHER             FlexibleCipher = MIX_CIPHER_NOTUSE;     // it provide the more flexible cipher combination in WPA-WPA2 and TKIPAES mode
 621
 622         rsnielen_cur_p = NULL;
 623         rsnielen_ex_cur_p = NULL;
 624
 625         {
 626                 IF_DEV_CONFIG_OPMODE_ON_STA(pAd)
 627                 {
 628                         if (pAd->StaCfg.WpaSupplicantUP != WPA_SUPPLICANT_DISABLE)
 629                         {
 630                                 if (AuthMode < Ndis802_11AuthModeWPA)
 631                                         return;
 632                         }
 633                         else
 634                         {
 635                                 // Support WPAPSK or WPA2PSK in STA-Infra mode
 636                                 // Support WPANone in STA-Adhoc mode
 637                                 if ((AuthMode != Ndis802_11AuthModeWPAPSK) &&
 638                                         (AuthMode != Ndis802_11AuthModeWPA2PSK) &&
 639                                         (AuthMode != Ndis802_11AuthModeWPANone)
 640                                         )
 641                                         return;
 642                         }
 643
 644                         DBGPRINT(RT_DEBUG_TRACE,("==> RTMPMakeRSNIE(STA)\n"));
 645
 646                         // Zero RSNIE context
 647                         pAd->StaCfg.RSNIE_Len = 0;
 648                         NdisZeroMemory(pAd->StaCfg.RSN_IE, MAX_LEN_OF_RSNIE);
 649
 650                         // Pointer to RSNIE
 651                         rsnielen_cur_p = &pAd->StaCfg.RSNIE_Len;
 652                         pRsnIe = pAd->StaCfg.RSN_IE;
 653
 654                         bMixCipher = pAd->StaCfg.bMixCipher;
 655                 }
 656         }
 657
 658         // indicate primary RSNIE as WPA or WPA2
 659         if ((AuthMode == Ndis802_11AuthModeWPA) ||
 660                 (AuthMode == Ndis802_11AuthModeWPAPSK) ||
 661                 (AuthMode == Ndis802_11AuthModeWPANone) ||
 662                 (AuthMode == Ndis802_11AuthModeWPA1WPA2) ||
 663                 (AuthMode == Ndis802_11AuthModeWPA1PSKWPA2PSK))
 664                 PrimaryRsnie = WpaIe;
 665         else
 666                 PrimaryRsnie = Wpa2Ie;
 667
 668         {
 669                 // Build the primary RSNIE
 670                 // 1. insert cipher suite
 671                 RTMPInsertRsnIeCipher(pAd, PrimaryRsnie, WepStatus, bMixCipher, FlexibleCipher, pRsnIe, &p_offset);
 672
 673                 // 2. insert AKM
 674                 RTMPInsertRsnIeAKM(pAd, PrimaryRsnie, AuthMode, apidx, pRsnIe, &p_offset);
 675
 676                 // 3. insert capability
 677                 RTMPInsertRsnIeCap(pAd, PrimaryRsnie, apidx, pRsnIe, &p_offset);
 678         }
 679
 680         // 4. update the RSNIE length
 681         *rsnielen_cur_p = p_offset;
 682
 683         hex_dump("The primary RSNIE", pRsnIe, (*rsnielen_cur_p));
 684
 685
 686 }
 687
 688 /*
 689     ==========================================================================
 690     Description:
 691                 Check whether the received frame is EAP frame.
 692
 693         Arguments:
 694                 pAd                             -       pointer to our pAdapter context
 695                 pEntry                  -       pointer to active entry
 696                 pData                   -       the received frame
 697                 DataByteCount   -       the received frame's length
 698                 FromWhichBSSID  -       indicate the interface index
 699
 700     Return:
 701          TRUE                   -       This frame is EAP frame
 702          FALSE                  -       otherwise
 703     ==========================================================================
 704 */
 705 BOOLEAN RTMPCheckWPAframe(
 706     IN PRTMP_ADAPTER    pAd,
 707     IN PMAC_TABLE_ENTRY pEntry,
 708     IN PUCHAR           pData,
 709     IN ULONG            DataByteCount,
 710         IN UCHAR                        FromWhichBSSID)
 711 {
 712         ULONG   Body_len;
 713         BOOLEAN Cancelled;
 714
 715
 716     if(DataByteCount < (LENGTH_802_1_H + LENGTH_EAPOL_H))
 717         return FALSE;
 718
 719
 720         // Skip LLC header
 721     if (NdisEqualMemory(SNAP_802_1H, pData, 6) ||
 722         // Cisco 1200 AP may send packet with SNAP_BRIDGE_TUNNEL
 723         NdisEqualMemory(SNAP_BRIDGE_TUNNEL, pData, 6))
 724     {
 725         pData += 6;
 726     }
 727         // Skip 2-bytes EAPoL type
 728     if (NdisEqualMemory(EAPOL, pData, 2))
 729     {
 730         pData += 2;
 731     }
 732     else
 733         return FALSE;
 734
 735     switch (*(pData+1))
 736     {
 737         case EAPPacket:
 738                         Body_len = (*(pData+2)<<8) | (*(pData+3));
 739             DBGPRINT(RT_DEBUG_TRACE, ("Receive EAP-Packet frame, TYPE = 0, Length = %ld\n", Body_len));
 740             break;
 741         case EAPOLStart:
 742             DBGPRINT(RT_DEBUG_TRACE, ("Receive EAPOL-Start frame, TYPE = 1 \n"));
 743                         if (pEntry->EnqueueEapolStartTimerRunning != EAPOL_START_DISABLE)
 744             {
 745                 DBGPRINT(RT_DEBUG_TRACE, ("Cancel the EnqueueEapolStartTimerRunning \n"));
 746                 RTMPCancelTimer(&pEntry->EnqueueStartForPSKTimer, &Cancelled);
 747                 pEntry->EnqueueEapolStartTimerRunning = EAPOL_START_DISABLE;
 748             }
 749             break;
 750         case EAPOLLogoff:
 751             DBGPRINT(RT_DEBUG_TRACE, ("Receive EAPOLLogoff frame, TYPE = 2 \n"));
 752             break;
 753         case EAPOLKey:
 754                         Body_len = (*(pData+2)<<8) | (*(pData+3));
 755             DBGPRINT(RT_DEBUG_TRACE, ("Receive EAPOL-Key frame, TYPE = 3, Length = %ld\n", Body_len));
 756             break;
 757         case EAPOLASFAlert:
 758             DBGPRINT(RT_DEBUG_TRACE, ("Receive EAPOLASFAlert frame, TYPE = 4 \n"));
 759             break;
 760         default:
 761             return FALSE;
 762
 763     }
 764     return TRUE;
 765 }
 766
 767
 768 /*
 769     ==========================================================================
 770     Description:
 771         ENCRYPT AES GTK before sending in EAPOL frame.
 772         AES GTK length = 128 bit,  so fix blocks for aes-key-wrap as 2 in this function.
 773         This function references to RFC 3394 for aes key wrap algorithm.
 774     Return:
 775     ==========================================================================
 776 */
 777 VOID AES_GTK_KEY_WRAP(
 778     IN UCHAR    *key,
 779     IN UCHAR    *plaintext,
 780     IN UCHAR    p_len,
 781     OUT UCHAR   *ciphertext)
 782 {
 783     UCHAR       A[8], BIN[16], BOUT[16];
 784     UCHAR       R[512];
 785     INT         num_blocks = p_len/8;   // unit:64bits
 786     INT         i, j;
 787     aes_context aesctx;
 788     UCHAR       xor;
 789
 790     rtmp_aes_set_key(&aesctx, key, 128);
 791
 792     // Init IA
 793     for (i = 0; i < 8; i++)
 794         A[i] = 0xa6;
 795
 796     //Input plaintext
 797     for (i = 0; i < num_blocks; i++)
 798     {
 799         for (j = 0 ; j < 8; j++)
 800             R[8 * (i + 1) + j] = plaintext[8 * i + j];
 801     }
 802
 803     // Key Mix
 804     for (j = 0; j < 6; j++)
 805     {
 806         for(i = 1; i <= num_blocks; i++)
 807         {
 808             //phase 1
 809             NdisMoveMemory(BIN, A, 8);
 810             NdisMoveMemory(&BIN[8], &R[8 * i], 8);
 811             rtmp_aes_encrypt(&aesctx, BIN, BOUT);
 812
 813             NdisMoveMemory(A, &BOUT[0], 8);
 814             xor = num_blocks * j + i;
 815             A[7] = BOUT[7] ^ xor;
 816             NdisMoveMemory(&R[8 * i], &BOUT[8], 8);
 817         }
 818     }
 819
 820     // Output ciphertext
 821     NdisMoveMemory(ciphertext, A, 8);
 822
 823     for (i = 1; i <= num_blocks; i++)
 824     {
 825         for (j = 0 ; j < 8; j++)
 826             ciphertext[8 * i + j] = R[8 * i + j];
 827     }
 828 }
 829
 830
 831 /*
 832         ========================================================================
 833
 834         Routine Description:
 835                 Misc function to decrypt AES body
 836
 837         Arguments:
 838
 839         Return Value:
 840
 841         Note:
 842                 This function references to     RFC     3394 for aes key unwrap algorithm.
 843
 844         ========================================================================
 845 */
 846 VOID    AES_GTK_KEY_UNWRAP(
 847         IN      UCHAR   *key,
 848         OUT     UCHAR   *plaintext,
 849         IN      UCHAR    c_len,
 850         IN      UCHAR   *ciphertext)
 851
 852 {
 853         UCHAR       A[8], BIN[16], BOUT[16];
 854         UCHAR       xor;
 855         INT         i, j;
 856         aes_context aesctx;
 857         UCHAR       *R;
 858         INT         num_blocks = c_len/8;       // unit:64bits
 859
 860
 861         os_alloc_mem(NULL, (PUCHAR *)&R, 512);
 862
 863         if (R == NULL)
 864     {
 865         DBGPRINT(RT_DEBUG_ERROR, ("!!!AES_GTK_KEY_UNWRAP: no memory!!!\n"));
 866         return;
 867     } /* End of if */
 868
 869         // Initialize
 870         NdisMoveMemory(A, ciphertext, 8);
 871         //Input plaintext
 872         for(i = 0; i < (c_len-8); i++)
 873         {
 874                 R[ i] = ciphertext[i + 8];
 875         }
 876
 877         rtmp_aes_set_key(&aesctx, key, 128);
 878
 879         for(j = 5; j >= 0; j--)
 880         {
 881                 for(i = (num_blocks-1); i > 0; i--)
 882                 {
 883                         xor = (num_blocks -1 )* j + i;
 884                         NdisMoveMemory(BIN, A, 8);
 885                         BIN[7] = A[7] ^ xor;
 886                         NdisMoveMemory(&BIN[8], &R[(i-1)*8], 8);
 887                         rtmp_aes_decrypt(&aesctx, BIN, BOUT);
 888                         NdisMoveMemory(A, &BOUT[0], 8);
 889                         NdisMoveMemory(&R[(i-1)*8], &BOUT[8], 8);
 890                 }
 891         }
 892
 893         // OUTPUT
 894         for(i = 0; i < c_len; i++)
 895         {
 896                 plaintext[i] = R[i];
 897         }
 898
 899
 900         os_free_mem(NULL, R);
 901 }
 902
 903 /*
 904     ==========================================================================
 905     Description:
 906                 Report the EAP message type
 907
 908         Arguments:
 909                 msg             -       EAPOL_PAIR_MSG_1
 910                                         EAPOL_PAIR_MSG_2
 911                                         EAPOL_PAIR_MSG_3
 912                                         EAPOL_PAIR_MSG_4
 913                                         EAPOL_GROUP_MSG_1
 914                                         EAPOL_GROUP_MSG_2
 915
 916     Return:
 917          message type string
 918
 919     ==========================================================================
 920 */
 921 CHAR *GetEapolMsgType(CHAR msg)
 922 {
 923     if(msg == EAPOL_PAIR_MSG_1)
 924         return "Pairwise Message 1";
 925     else if(msg == EAPOL_PAIR_MSG_2)
 926         return "Pairwise Message 2";
 927         else if(msg == EAPOL_PAIR_MSG_3)
 928         return "Pairwise Message 3";
 929         else if(msg == EAPOL_PAIR_MSG_4)
 930         return "Pairwise Message 4";
 931         else if(msg == EAPOL_GROUP_MSG_1)
 932         return "Group Message 1";
 933         else if(msg == EAPOL_GROUP_MSG_2)
 934         return "Group Message 2";
 935     else
 936         return "Invalid Message";
 937 }
 938
 939
 940 /*
 941     ========================================================================
 942
 943     Routine Description:
 944     Check Sanity RSN IE of EAPoL message
 945
 946     Arguments:
 947
 948     Return Value:
 949
 950
 951     ========================================================================
 952 */
 953 BOOLEAN RTMPCheckRSNIE(
 954         IN  PRTMP_ADAPTER   pAd,
 955         IN  PUCHAR          pData,
 956         IN  UCHAR           DataLen,
 957         IN  MAC_TABLE_ENTRY *pEntry,
 958         OUT     UCHAR                   *Offset)
 959 {
 960         PUCHAR              pVIE;
 961         UCHAR               len;
 962         PEID_STRUCT         pEid;
 963         BOOLEAN                         result = FALSE;
 964
 965         pVIE = pData;
 966         len      = DataLen;
 967         *Offset = 0;
 968
 969         while (len > sizeof(RSNIE2))
 970         {
 971                 pEid = (PEID_STRUCT) pVIE;
 972                 // WPA RSN IE
 973                 if ((pEid->Eid == IE_WPA) && (NdisEqualMemory(pEid->Octet, WPA_OUI, 4)))
 974                 {
 975                         if ((pEntry->AuthMode == Ndis802_11AuthModeWPA || pEntry->AuthMode == Ndis802_11AuthModeWPAPSK) &&
 976                                 (NdisEqualMemory(pVIE, pEntry->RSN_IE, pEntry->RSNIE_Len)) &&
 977                                 (pEntry->RSNIE_Len == (pEid->Len + 2)))
 978                         {
 979                                         result = TRUE;
 980                         }
 981
 982                         *Offset += (pEid->Len + 2);
 983                 }
 984                 // WPA2 RSN IE
 985                 else if ((pEid->Eid == IE_RSN) && (NdisEqualMemory(pEid->Octet + 2, RSN_OUI, 3)))
 986                 {
 987                         if ((pEntry->AuthMode == Ndis802_11AuthModeWPA2 || pEntry->AuthMode == Ndis802_11AuthModeWPA2PSK) &&
 988                                 (NdisEqualMemory(pVIE, pEntry->RSN_IE, pEntry->RSNIE_Len)) &&
 989                                 (pEntry->RSNIE_Len == (pEid->Len + 2))/* ToDo-AlbertY for mesh*/)
 990                         {
 991                                         result = TRUE;
 992                         }
 993
 994                         *Offset += (pEid->Len + 2);
 995                 }
 996                 else
 997                 {
 998                         break;
 999                 }
1000
1001                 pVIE += (pEid->Len + 2);
1002                 len  -= (pEid->Len + 2);
1003         }
1004
1005
1006         return result;
1007
1008 }
1009
1010
1011 /*
1012     ========================================================================
1013
1014     Routine Description:
1015     Parse KEYDATA field.  KEYDATA[] May contain 2 RSN IE and optionally GTK.
1016     GTK  is encaptulated in KDE format at  p.83 802.11i D10
1017
1018     Arguments:
1019
1020     Return Value:
1021
1022     Note:
1023         802.11i D10
1024
1025     ========================================================================
1026 */
1027 BOOLEAN RTMPParseEapolKeyData(
1028         IN  PRTMP_ADAPTER   pAd,
1029         IN  PUCHAR          pKeyData,
1030         IN  UCHAR           KeyDataLen,
1031         IN      UCHAR                   GroupKeyIndex,
1032         IN      UCHAR                   MsgType,
1033         IN      BOOLEAN                 bWPA2,
1034         IN  MAC_TABLE_ENTRY *pEntry)
1035 {
1036     PKDE_ENCAP          pKDE = NULL;
1037     PUCHAR              pMyKeyData = pKeyData;
1038     UCHAR               KeyDataLength = KeyDataLen;
1039     UCHAR               GTKLEN = 0;
1040         UCHAR                           DefaultIdx = 0;
1041         UCHAR                           skip_offset;
1042
1043         // Verify The RSN IE contained in pairewise_msg_2 && pairewise_msg_3 and skip it
1044         if (MsgType == EAPOL_PAIR_MSG_2 || MsgType == EAPOL_PAIR_MSG_3)
1045     {
1046                 // Check RSN IE whether it is WPA2/WPA2PSK
1047                 if (!RTMPCheckRSNIE(pAd, pKeyData, KeyDataLen, pEntry, &skip_offset))
1048                 {
1049                         // send wireless event - for RSN IE different
1050                         if (pAd->CommonCfg.bWirelessEvent)
1051                                 RTMPSendWirelessEvent(pAd, IW_RSNIE_DIFF_EVENT_FLAG, pEntry->Addr, pEntry->apidx, 0);
1052
1053                 DBGPRINT(RT_DEBUG_ERROR, ("RSN_IE Different in msg %d of 4-way handshake!\n", MsgType));
1054                         hex_dump("Receive RSN_IE ", pKeyData, KeyDataLen);
1055                         hex_dump("Desired RSN_IE ", pEntry->RSN_IE, pEntry->RSNIE_Len);
1056
1057                         return FALSE;
1058         }
1059         else
1060                 {
1061                         if (bWPA2 && MsgType == EAPOL_PAIR_MSG_3)
1062                         {
1063                                 // skip RSN IE
1064                                 pMyKeyData += skip_offset;
1065                                 KeyDataLength -= skip_offset;
1066                                 DBGPRINT(RT_DEBUG_TRACE, ("RTMPParseEapolKeyData ==> WPA2/WPA2PSK RSN IE matched in Msg 3, Length(%d) \n", skip_offset));
1067                         }
1068                         else
1069                                 return TRUE;
1070                 }
1071         }
1072
1073         DBGPRINT(RT_DEBUG_TRACE,("RTMPParseEapolKeyData ==> KeyDataLength %d without RSN_IE \n", KeyDataLength));
1074
1075         // Parse EKD format in pairwise_msg_3_WPA2 && group_msg_1_WPA2
1076         if (bWPA2 && (MsgType == EAPOL_PAIR_MSG_3 || MsgType == EAPOL_GROUP_MSG_1))
1077         {
1078                 if (KeyDataLength >= 8) // KDE format exclude GTK length
1079         {
1080                 pKDE = (PKDE_ENCAP) pMyKeyData;
1081
1082
1083                         DefaultIdx = pKDE->GTKEncap.Kid;
1084
1085                         // Sanity check - KED length
1086                         if (KeyDataLength < (pKDE->Len + 2))
1087                 {
1088                         DBGPRINT(RT_DEBUG_ERROR, ("ERROR: The len from KDE is too short \n"));
1089                         return FALSE;
1090                 }
1091
1092                         // Get GTK length - refer to IEEE 802.11i-2004 p.82
1093                         GTKLEN = pKDE->Len -6;
1094                         if (GTKLEN < LEN_AES_KEY)
1095                         {
1096                                 DBGPRINT(RT_DEBUG_ERROR, ("ERROR: GTK Key length is too short (%d) \n", GTKLEN));
1097                         return FALSE;
1098                         }
1099
1100         }
1101                 else
1102         {
1103                         DBGPRINT(RT_DEBUG_ERROR, ("ERROR: KDE format length is too short \n"));
1104                 return FALSE;
1105         }
1106
1107                 DBGPRINT(RT_DEBUG_TRACE, ("GTK in KDE format ,DefaultKeyID=%d, KeyLen=%d \n", DefaultIdx, GTKLEN));
1108                 // skip it
1109                 pMyKeyData += 8;
1110                 KeyDataLength -= 8;
1111
1112         }
1113         else if (!bWPA2 && MsgType == EAPOL_GROUP_MSG_1)
1114         {
1115                 DefaultIdx = GroupKeyIndex;
1116                 DBGPRINT(RT_DEBUG_TRACE, ("GTK DefaultKeyID=%d \n", DefaultIdx));
1117         }
1118
1119         // Sanity check - shared key index must be 1 ~ 3
1120         if (DefaultIdx < 1 || DefaultIdx > 3)
1121     {
1122         DBGPRINT(RT_DEBUG_ERROR, ("ERROR: GTK Key index(%d) is invalid in %s %s \n", DefaultIdx, ((bWPA2) ? "WPA2" : "WPA"), GetEapolMsgType(MsgType)));
1123         return FALSE;
1124     }
1125
1126         return TRUE;
1127
1128 }
1129
1130
1131 /*
1132         ========================================================================
1133
1134         Routine Description:
1135                 Construct EAPoL message for WPA handshaking
1136                 Its format is below,
1137
1138                 +--------------------+
1139                 | Protocol Version       |  1 octet
1140                 +--------------------+
1141                 | Protocol Type          |      1 octet
1142                 +--------------------+
1143                 | Body Length            |  2 octets
1144                 +--------------------+
1145                 | Descriptor Type        |      1 octet
1146                 +--------------------+
1147                 | Key Information    |  2 octets
1148                 +--------------------+
1149                 | Key Length         |  1 octet
1150                 +--------------------+
1151                 | Key Repaly Counter |  8 octets
1152                 +--------------------+
1153                 | Key Nonce                  |  32 octets
1154                 +--------------------+
1155                 | Key IV                         |  16 octets
1156                 +--------------------+
1157                 | Key RSC                        |  8 octets
1158                 +--------------------+
1159                 | Key ID or Reserved |  8 octets
1160                 +--------------------+
1161                 | Key MIC                        |      16 octets
1162                 +--------------------+
1163                 | Key Data Length        |      2 octets
1164                 +--------------------+
1165                 | Key Data                       |      n octets
1166                 +--------------------+
1167
1168
1169         Arguments:
1170                 pAd                     Pointer to our adapter
1171
1172         Return Value:
1173                 None
1174
1175         Note:
1176
1177         ========================================================================
1178 */
1179 VOID    ConstructEapolMsg(
1180         IN      PRTMP_ADAPTER           pAd,
1181     IN  UCHAR                           AuthMode,
1182     IN  UCHAR                           WepStatus,
1183     IN  UCHAR                           GroupKeyWepStatus,
1184     IN  UCHAR                           MsgType,
1185     IN  UCHAR                           DefaultKeyIdx,
1186     IN  UCHAR                           *ReplayCounter,
1187         IN      UCHAR                           *KeyNonce,
1188         IN      UCHAR                           *TxRSC,
1189         IN      UCHAR                           *PTK,
1190         IN      UCHAR                           *GTK,
1191         IN      UCHAR                           *RSNIE,
1192         IN      UCHAR                           RSNIE_Len,
1193     OUT PEAPOL_PACKET       pMsg)
1194 {
1195         BOOLEAN bWPA2 = FALSE;
1196
1197         // Choose WPA2 or not
1198         if ((AuthMode == Ndis802_11AuthModeWPA2) || (AuthMode == Ndis802_11AuthModeWPA2PSK))
1199                 bWPA2 = TRUE;
1200
1201     // Init Packet and Fill header
1202     pMsg->ProVer = EAPOL_VER;
1203     pMsg->ProType = EAPOLKey;
1204
1205         // Default 95 bytes, the EAPoL-Key descriptor exclude Key-data field
1206         pMsg->Body_Len[1] = LEN_EAPOL_KEY_MSG;
1207
1208         // Fill in EAPoL descriptor
1209         if (bWPA2)
1210                 pMsg->KeyDesc.Type = WPA2_KEY_DESC;
1211         else
1212                 pMsg->KeyDesc.Type = WPA1_KEY_DESC;
1213
1214         // Fill in Key information, refer to IEEE Std 802.11i-2004 page 78
1215         // When either the pairwise or the group cipher is AES, the DESC_TYPE_AES(2) shall be used.
1216         pMsg->KeyDesc.KeyInfo.KeyDescVer =
1217                 (((WepStatus == Ndis802_11Encryption3Enabled) || (GroupKeyWepStatus == Ndis802_11Encryption3Enabled)) ? (DESC_TYPE_AES) : (DESC_TYPE_TKIP));
1218
1219         // Specify Key Type as Group(0) or Pairwise(1)
1220         if (MsgType >= EAPOL_GROUP_MSG_1)
1221                 pMsg->KeyDesc.KeyInfo.KeyType = GROUPKEY;
1222         else
1223                 pMsg->KeyDesc.KeyInfo.KeyType = PAIRWISEKEY;
1224
1225         // Specify Key Index, only group_msg1_WPA1
1226         if (!bWPA2 && (MsgType >= EAPOL_GROUP_MSG_1))
1227                 pMsg->KeyDesc.KeyInfo.KeyIndex = DefaultKeyIdx;
1228
1229         if (MsgType == EAPOL_PAIR_MSG_3)
1230                 pMsg->KeyDesc.KeyInfo.Install = 1;
1231
1232         if ((MsgType == EAPOL_PAIR_MSG_1) || (MsgType == EAPOL_PAIR_MSG_3) || (MsgType == EAPOL_GROUP_MSG_1))
1233                 pMsg->KeyDesc.KeyInfo.KeyAck = 1;
1234
1235         if (MsgType != EAPOL_PAIR_MSG_1)
1236                 pMsg->KeyDesc.KeyInfo.KeyMic = 1;
1237
1238         if ((bWPA2 && (MsgType >= EAPOL_PAIR_MSG_3)) || (!bWPA2 && (MsgType >= EAPOL_GROUP_MSG_1)))
1239     {
1240         pMsg->KeyDesc.KeyInfo.Secure = 1;
1241     }
1242
1243         if (bWPA2 && ((MsgType == EAPOL_PAIR_MSG_3) || (MsgType == EAPOL_GROUP_MSG_1)))
1244     {
1245         pMsg->KeyDesc.KeyInfo.EKD_DL = 1;
1246     }
1247
1248         // key Information element has done.
1249         *(USHORT *)(&pMsg->KeyDesc.KeyInfo) = cpu2le16(*(USHORT *)(&pMsg->KeyDesc.KeyInfo));
1250
1251         // Fill in Key Length
1252         {
1253                 if (MsgType >= EAPOL_GROUP_MSG_1)
1254                 {
1255                         // the length of group key cipher
1256                         pMsg->KeyDesc.KeyLength[1] = ((GroupKeyWepStatus == Ndis802_11Encryption2Enabled) ? TKIP_GTK_LENGTH : LEN_AES_KEY);
1257                 }
1258                 else
1259                 {
1260                         // the length of pairwise key cipher
1261                         pMsg->KeyDesc.KeyLength[1] = ((WepStatus == Ndis802_11Encryption2Enabled) ? LEN_TKIP_KEY : LEN_AES_KEY);
1262                 }
1263         }
1264
1265         // Fill in replay counter
1266     NdisMoveMemory(pMsg->KeyDesc.ReplayCounter, ReplayCounter, LEN_KEY_DESC_REPLAY);
1267
1268         // Fill Key Nonce field
1269         // ANonce : pairwise_msg1 & pairwise_msg3
1270         // SNonce : pairwise_msg2
1271         // GNonce : group_msg1_wpa1
1272         if ((MsgType <= EAPOL_PAIR_MSG_3) || ((!bWPA2 && (MsgType == EAPOL_GROUP_MSG_1))))
1273         NdisMoveMemory(pMsg->KeyDesc.KeyNonce, KeyNonce, LEN_KEY_DESC_NONCE);
1274
1275         // Fill key IV - WPA2 as 0, WPA1 as random
1276         if (!bWPA2 && (MsgType == EAPOL_GROUP_MSG_1))
1277         {
1278                 // Suggest IV be random number plus some number,
1279                 NdisMoveMemory(pMsg->KeyDesc.KeyIv, &KeyNonce[16], LEN_KEY_DESC_IV);
1280         pMsg->KeyDesc.KeyIv[15] += 2;
1281         }
1282
1283     // Fill Key RSC field
1284     // It contains the RSC for the GTK being installed.
1285         if ((MsgType == EAPOL_PAIR_MSG_3 && bWPA2) || (MsgType == EAPOL_GROUP_MSG_1))
1286         {
1287         NdisMoveMemory(pMsg->KeyDesc.KeyRsc, TxRSC, 6);
1288         }
1289
1290         // Clear Key MIC field for MIC calculation later
1291     NdisZeroMemory(pMsg->KeyDesc.KeyMic, LEN_KEY_DESC_MIC);
1292
1293         ConstructEapolKeyData(pAd,
1294                                                   AuthMode,
1295                                                   WepStatus,
1296                                                   GroupKeyWepStatus,
1297                                                   MsgType,
1298                                                   DefaultKeyIdx,
1299                                                   bWPA2,
1300                                                   PTK,
1301                                                   GTK,
1302                                                   RSNIE,
1303                                                   RSNIE_Len,
1304                                                   pMsg);
1305
1306         // Calculate MIC and fill in KeyMic Field except Pairwise Msg 1.
1307         if (MsgType != EAPOL_PAIR_MSG_1)
1308         {
1309                 CalculateMIC(pAd, WepStatus, PTK, pMsg);
1310         }
1311
1312         DBGPRINT(RT_DEBUG_TRACE, ("===> ConstructEapolMsg for %s %s\n", ((bWPA2) ? "WPA2" : "WPA"), GetEapolMsgType(MsgType)));
1313         DBGPRINT(RT_DEBUG_TRACE, ("          Body length = %d \n", pMsg->Body_Len[1]));
1314         DBGPRINT(RT_DEBUG_TRACE, ("          Key length  = %d \n", pMsg->KeyDesc.KeyLength[1]));
1315
1316
1317 }
1318
1319 /*
1320         ========================================================================
1321
1322         Routine Description:
1323                 Construct the Key Data field of EAPoL message
1324
1325         Arguments:
1326                 pAd                     Pointer to our adapter
1327                 Elem            Message body
1328
1329         Return Value:
1330                 None
1331
1332         Note:
1333
1334         ========================================================================
1335 */
1336 VOID    ConstructEapolKeyData(
1337         IN      PRTMP_ADAPTER   pAd,
1338         IN      UCHAR                   AuthMode,
1339         IN      UCHAR                   WepStatus,
1340         IN      UCHAR                   GroupKeyWepStatus,
1341         IN      UCHAR                   MsgType,
1342         IN      UCHAR                   DefaultKeyIdx,
1343         IN      BOOLEAN                 bWPA2Capable,
1344         IN      UCHAR                   *PTK,
1345         IN      UCHAR                   *GTK,
1346         IN      UCHAR                   *RSNIE,
1347         IN      UCHAR                   RSNIE_LEN,
1348         OUT PEAPOL_PACKET   pMsg)
1349 {
1350         UCHAR           *mpool, *Key_Data, *Rc4GTK;
1351         UCHAR       ekey[(LEN_KEY_DESC_IV+LEN_EAP_EK)];
1352         UCHAR           data_offset;
1353
1354
1355         if (MsgType == EAPOL_PAIR_MSG_1 || MsgType == EAPOL_PAIR_MSG_4 || MsgType == EAPOL_GROUP_MSG_2)
1356                 return;
1357
1358         // allocate memory pool
1359         os_alloc_mem(pAd, (PUCHAR *)&mpool, 1500);
1360
1361     if (mpool == NULL)
1362                 return;
1363
1364         /* Rc4GTK Len = 512 */
1365         Rc4GTK = (UCHAR *) ROUND_UP(mpool, 4);
1366         /* Key_Data Len = 512 */
1367         Key_Data = (UCHAR *) ROUND_UP(Rc4GTK + 512, 4);
1368
1369         NdisZeroMemory(Key_Data, 512);
1370         pMsg->KeyDesc.KeyDataLen[1] = 0;
1371         data_offset = 0;
1372
1373         // Encapsulate RSNIE in pairwise_msg2 & pairwise_msg3
1374         if (RSNIE_LEN && ((MsgType == EAPOL_PAIR_MSG_2) || (MsgType == EAPOL_PAIR_MSG_3)))
1375         {
1376                 if (bWPA2Capable)
1377                         Key_Data[data_offset + 0] = IE_WPA2;
1378                 else
1379                         Key_Data[data_offset + 0] = IE_WPA;
1380
1381         Key_Data[data_offset + 1] = RSNIE_LEN;
1382                 NdisMoveMemory(&Key_Data[data_offset + 2], RSNIE, RSNIE_LEN);
1383                 data_offset += (2 + RSNIE_LEN);
1384         }
1385
1386         // Encapsulate KDE format in pairwise_msg3_WPA2 & group_msg1_WPA2
1387         if (bWPA2Capable && ((MsgType == EAPOL_PAIR_MSG_3) || (MsgType == EAPOL_GROUP_MSG_1)))
1388         {
1389                 // Key Data Encapsulation (KDE) format - 802.11i-2004  Figure-43w and Table-20h
1390         Key_Data[data_offset + 0] = 0xDD;
1391
1392                 if (GroupKeyWepStatus == Ndis802_11Encryption3Enabled)
1393                 {
1394                         Key_Data[data_offset + 1] = 0x16;// 4+2+16(OUI+DataType+DataField)
1395                 }
1396                 else
1397                 {
1398                         Key_Data[data_offset + 1] = 0x26;// 4+2+32(OUI+DataType+DataField)
1399                 }
1400
1401         Key_Data[data_offset + 2] = 0x00;
1402         Key_Data[data_offset + 3] = 0x0F;
1403         Key_Data[data_offset + 4] = 0xAC;
1404         Key_Data[data_offset + 5] = 0x01;
1405
1406                 // GTK KDE format - 802.11i-2004  Figure-43x
1407         Key_Data[data_offset + 6] = (DefaultKeyIdx & 0x03);
1408         Key_Data[data_offset + 7] = 0x00;       // Reserved Byte
1409
1410                 data_offset += 8;
1411         }
1412
1413
1414         // Encapsulate GTK and encrypt the key-data field with KEK.
1415         // Only for pairwise_msg3_WPA2 and group_msg1
1416         if ((MsgType == EAPOL_PAIR_MSG_3 && bWPA2Capable) || (MsgType == EAPOL_GROUP_MSG_1))
1417         {
1418                 // Fill in GTK
1419                 if (GroupKeyWepStatus == Ndis802_11Encryption3Enabled)
1420                 {
1421                         NdisMoveMemory(&Key_Data[data_offset], GTK, LEN_AES_KEY);
1422                         data_offset += LEN_AES_KEY;
1423                 }
1424                 else
1425                 {
1426                         NdisMoveMemory(&Key_Data[data_offset], GTK, TKIP_GTK_LENGTH);
1427                         data_offset += TKIP_GTK_LENGTH;
1428                 }
1429
1430                 // Still dont know why, but if not append will occur "GTK not include in MSG3"
1431                 // Patch for compatibility between zero config and funk
1432                 if (MsgType == EAPOL_PAIR_MSG_3 && bWPA2Capable)
1433                 {
1434                         if (GroupKeyWepStatus == Ndis802_11Encryption3Enabled)
1435                         {
1436                                 Key_Data[data_offset + 0] = 0xDD;
1437                                 Key_Data[data_offset + 1] = 0;
1438                                 data_offset += 2;
1439                         }
1440                         else
1441                         {
1442                                 Key_Data[data_offset + 0] = 0xDD;
1443                                 Key_Data[data_offset + 1] = 0;
1444                                 Key_Data[data_offset + 2] = 0;
1445                                 Key_Data[data_offset + 3] = 0;
1446                                 Key_Data[data_offset + 4] = 0;
1447                                 Key_Data[data_offset + 5] = 0;
1448                                 data_offset += 6;
1449                         }
1450                 }
1451
1452                 // Encrypt the data material in key data field
1453                 if (WepStatus == Ndis802_11Encryption3Enabled)
1454                 {
1455                         AES_GTK_KEY_WRAP(&PTK[16], Key_Data, data_offset, Rc4GTK);
1456             // AES wrap function will grow 8 bytes in length
1457             data_offset += 8;
1458                 }
1459                 else
1460                 {
1461                         // PREPARE Encrypted  "Key DATA" field.  (Encrypt GTK with RC4, usinf PTK[16]->[31] as Key, IV-field as IV)
1462                         // put TxTsc in Key RSC field
1463                         pAd->PrivateInfo.FCSCRC32 = PPPINITFCS32;   //Init crc32.
1464
1465                         // ekey is the contanetion of IV-field, and PTK[16]->PTK[31]
1466                         NdisMoveMemory(ekey, pMsg->KeyDesc.KeyIv, LEN_KEY_DESC_IV);
1467                         NdisMoveMemory(&ekey[LEN_KEY_DESC_IV], &PTK[16], LEN_EAP_EK);
1468                         ARCFOUR_INIT(&pAd->PrivateInfo.WEPCONTEXT, ekey, sizeof(ekey));  //INIT SBOX, KEYLEN+3(IV)
1469                         pAd->PrivateInfo.FCSCRC32 = RTMP_CALC_FCS32(pAd->PrivateInfo.FCSCRC32, Key_Data, data_offset);
1470                         WPAARCFOUR_ENCRYPT(&pAd->PrivateInfo.WEPCONTEXT, Rc4GTK, Key_Data, data_offset);
1471                 }
1472
1473                 NdisMoveMemory(pMsg->KeyDesc.KeyData, Rc4GTK, data_offset);
1474         }
1475         else
1476         {
1477                 NdisMoveMemory(pMsg->KeyDesc.KeyData, Key_Data, data_offset);
1478         }
1479
1480         // set key data length field and total length
1481         pMsg->KeyDesc.KeyDataLen[1] = data_offset;
1482     pMsg->Body_Len[1] += data_offset;
1483
1484         os_free_mem(pAd, mpool);
1485
1486 }
1487
1488 /*
1489         ========================================================================
1490
1491         Routine Description:
1492                 Calcaulate MIC. It is used during 4-ways handsharking.
1493
1494         Arguments:
1495                 pAd                             -       pointer to our pAdapter context
1496         PeerWepStatus   -       indicate the encryption type
1497
1498         Return Value:
1499
1500         Note:
1501
1502         ========================================================================
1503 */
1504 VOID    CalculateMIC(
1505         IN      PRTMP_ADAPTER   pAd,
1506         IN      UCHAR                   PeerWepStatus,
1507         IN      UCHAR                   *PTK,
1508         OUT PEAPOL_PACKET   pMsg)
1509 {
1510     UCHAR   *OutBuffer;
1511         ULONG   FrameLen = 0;
1512         UCHAR   mic[LEN_KEY_DESC_MIC];
1513         UCHAR   digest[80];
1514
1515         // allocate memory for MIC calculation
1516         os_alloc_mem(pAd, (PUCHAR *)&OutBuffer, 512);
1517
1518     if (OutBuffer == NULL)
1519     {
1520                 DBGPRINT(RT_DEBUG_ERROR, ("!!!CalculateMIC: no memory!!!\n"));
1521                 return;
1522     }
1523
1524         // make a frame for calculating MIC.
1525     MakeOutgoingFrame(OutBuffer,                &FrameLen,
1526                       pMsg->Body_Len[1] + 4,    pMsg,
1527                       END_OF_ARGS);
1528
1529         NdisZeroMemory(mic, sizeof(mic));
1530
1531         // Calculate MIC
1532     if (PeerWepStatus == Ndis802_11Encryption3Enabled)
1533         {
1534                 HMAC_SHA1(OutBuffer,  FrameLen, PTK, LEN_EAP_MICK, digest);
1535                 NdisMoveMemory(mic, digest, LEN_KEY_DESC_MIC);
1536         }
1537         else
1538         {
1539                 hmac_md5(PTK,  LEN_EAP_MICK, OutBuffer, FrameLen, mic);
1540         }
1541
1542         // store the calculated MIC
1543         NdisMoveMemory(pMsg->KeyDesc.KeyMic, mic, LEN_KEY_DESC_MIC);
1544
1545         os_free_mem(pAd, OutBuffer);
1546 }
1547
1548 /*
1549         ========================================================================
1550
1551         Routine Description:
1552                 Some received frames can't decrypt by Asic, so decrypt them by software.
1553
1554         Arguments:
1555                 pAd                             -       pointer to our pAdapter context
1556         PeerWepStatus   -       indicate the encryption type
1557
1558         Return Value:
1559                 NDIS_STATUS_SUCCESS             -       decryption successful
1560                 NDIS_STATUS_FAILURE             -       decryption failure
1561
1562         ========================================================================
1563 */
1564 NDIS_STATUS     RTMPSoftDecryptBroadCastData(
1565         IN      PRTMP_ADAPTER                                   pAd,
1566         IN      RX_BLK                                                  *pRxBlk,
1567         IN  NDIS_802_11_ENCRYPTION_STATUS       GroupCipher,
1568         IN  PCIPHER_KEY                                         pShard_key)
1569 {
1570         PRXWI_STRUC                     pRxWI = pRxBlk->pRxWI;
1571
1572
1573
1574         // handle WEP decryption
1575         if (GroupCipher == Ndis802_11Encryption1Enabled)
1576     {
1577                 if (RTMPSoftDecryptWEP(pAd, pRxBlk->pData, pRxWI->MPDUtotalByteCount, pShard_key))
1578                 {
1579
1580                         //Minus IV[4] & ICV[4]
1581                         pRxWI->MPDUtotalByteCount -= 8;
1582                 }
1583                 else
1584                 {
1585                         DBGPRINT(RT_DEBUG_ERROR, ("ERROR : Software decrypt WEP data fails.\n"));
1586                         // give up this frame
1587                         return NDIS_STATUS_FAILURE;
1588                 }
1589         }
1590         // handle TKIP decryption
1591         else if (GroupCipher == Ndis802_11Encryption2Enabled)
1592         {
1593                 if (RTMPSoftDecryptTKIP(pAd, pRxBlk->pData, pRxWI->MPDUtotalByteCount, 0, pShard_key))
1594                 {
1595
1596                         //Minus 8 bytes MIC, 8 bytes IV/EIV, 4 bytes ICV
1597                         pRxWI->MPDUtotalByteCount -= 20;
1598                 }
1599         else
1600                 {
1601                         DBGPRINT(RT_DEBUG_ERROR, ("ERROR : RTMPSoftDecryptTKIP Failed\n"));
1602                         // give up this frame
1603                         return NDIS_STATUS_FAILURE;
1604         }
1605         }
1606         // handle AES decryption
1607         else if (GroupCipher == Ndis802_11Encryption3Enabled)
1608         {
1609                 if (RTMPSoftDecryptAES(pAd, pRxBlk->pData, pRxWI->MPDUtotalByteCount , pShard_key))
1610                 {
1611
1612                         //8 bytes MIC, 8 bytes IV/EIV (CCMP Header)
1613                         pRxWI->MPDUtotalByteCount -= 16;
1614                 }
1615                 else
1616                 {
1617                         DBGPRINT(RT_DEBUG_ERROR, ("ERROR : RTMPSoftDecryptAES Failed\n"));
1618                         // give up this frame
1619                         return NDIS_STATUS_FAILURE;
1620                 }
1621         }
1622         else
1623         {
1624                 // give up this frame
1625                 return NDIS_STATUS_FAILURE;
1626         }
1627
1628         return NDIS_STATUS_SUCCESS;
1629
1630 }
1631