drivers/staging/rt3090/sta/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
  39 #include "../rt_config.h"
  40
  41
  42 void inc_byte_array(UCHAR *counter, int len);
  43
  44 /*
  45         ========================================================================
  46
  47         Routine Description:
  48                 Process MIC error indication and record MIC error timer.
  49
  50         Arguments:
  51                 pAd     Pointer to our adapter
  52                 pWpaKey                 Pointer to the WPA key structure
  53
  54         Return Value:
  55                 None
  56
  57         IRQL = DISPATCH_LEVEL
  58
  59         Note:
  60
  61         ========================================================================
  62 */
  63 VOID    RTMPReportMicError(
  64         IN      PRTMP_ADAPTER   pAd,
  65         IN      PCIPHER_KEY     pWpaKey)
  66 {
  67         ULONG   Now;
  68     UCHAR   unicastKey = (pWpaKey->Type == PAIRWISE_KEY ? 1:0);
  69
  70         // Record Last MIC error time and count
  71         NdisGetSystemUpTime(&Now);
  72         if (pAd->StaCfg.MicErrCnt == 0)
  73         {
  74                 pAd->StaCfg.MicErrCnt++;
  75                 pAd->StaCfg.LastMicErrorTime = Now;
  76         NdisZeroMemory(pAd->StaCfg.ReplayCounter, 8);
  77         }
  78         else if (pAd->StaCfg.MicErrCnt == 1)
  79         {
  80                 if ((pAd->StaCfg.LastMicErrorTime + (60 * OS_HZ)) < Now)
  81                 {
  82                         // Update Last MIC error time, this did not violate two MIC errors within 60 seconds
  83                         pAd->StaCfg.LastMicErrorTime = Now;
  84                 }
  85                 else
  86                 {
  87
  88                         if (pAd->CommonCfg.bWirelessEvent)
  89                                 RTMPSendWirelessEvent(pAd, IW_COUNTER_MEASURES_EVENT_FLAG, pAd->MacTab.Content[BSSID_WCID].Addr, BSS0, 0);
  90
  91                         pAd->StaCfg.LastMicErrorTime = Now;
  92                         // Violate MIC error counts, MIC countermeasures kicks in
  93                         pAd->StaCfg.MicErrCnt++;
  94                         // We shall block all reception
  95                         // We shall clean all Tx ring and disassoicate from AP after next EAPOL frame
  96                         //
  97                         // No necessary to clean all Tx ring, on RTMPHardTransmit will stop sending non-802.1X EAPOL packets
  98                         // if pAd->StaCfg.MicErrCnt greater than 2.
  99                         //
 100                         // RTMPRingCleanUp(pAd, QID_AC_BK);
 101                         // RTMPRingCleanUp(pAd, QID_AC_BE);
 102                         // RTMPRingCleanUp(pAd, QID_AC_VI);
 103                         // RTMPRingCleanUp(pAd, QID_AC_VO);
 104                         // RTMPRingCleanUp(pAd, QID_HCCA);
 105                 }
 106         }
 107         else
 108         {
 109                 // MIC error count >= 2
 110                 // This should not happen
 111                 ;
 112         }
 113     MlmeEnqueue(pAd,
 114                                 MLME_CNTL_STATE_MACHINE,
 115                                 OID_802_11_MIC_FAILURE_REPORT_FRAME,
 116                                 1,
 117                                 &unicastKey);
 118
 119     if (pAd->StaCfg.MicErrCnt == 2)
 120     {
 121         RTMPSetTimer(&pAd->StaCfg.WpaDisassocAndBlockAssocTimer, 100);
 122     }
 123 }
 124
 125
 126 #ifdef WPA_SUPPLICANT_SUPPORT
 127 #define LENGTH_EAP_H    4
 128 // If the received frame is EAP-Packet ,find out its EAP-Code (Request(0x01), Response(0x02), Success(0x03), Failure(0x04)).
 129 INT         WpaCheckEapCode(
 130         IN  PRTMP_ADAPTER               pAd,
 131         IN  PUCHAR                              pFrame,
 132         IN  USHORT                              FrameLen,
 133         IN  USHORT                              OffSet)
 134 {
 135
 136         PUCHAR  pData;
 137         INT     result = 0;
 138
 139         if( FrameLen < OffSet + LENGTH_EAPOL_H + LENGTH_EAP_H )
 140                 return result;
 141
 142         pData = pFrame + OffSet; // skip offset bytes
 143
 144         if(*(pData+1) == EAPPacket)     // 802.1x header - Packet Type
 145         {
 146                  result = *(pData+4);           // EAP header - Code
 147         }
 148
 149         return result;
 150 }
 151
 152 VOID    WpaSendMicFailureToWpaSupplicant(
 153     IN  PRTMP_ADAPTER    pAd,
 154     IN  BOOLEAN          bUnicast)
 155 {
 156         char custom[IW_CUSTOM_MAX] = {0};
 157
 158         sprintf(custom, "MLME-MICHAELMICFAILURE.indication");
 159         if(bUnicast)
 160                 sprintf(custom, "%s unicast", custom);
 161
 162         RtmpOSWrielessEventSend(pAd, IWEVCUSTOM, -1, NULL, (PUCHAR)custom, strlen(custom));
 163
 164         return;
 165 }
 166 #endif // WPA_SUPPLICANT_SUPPORT //
 167
 168 VOID    WpaMicFailureReportFrame(
 169         IN  PRTMP_ADAPTER   pAd,
 170         IN MLME_QUEUE_ELEM *Elem)
 171 {
 172         PUCHAR              pOutBuffer = NULL;
 173         UCHAR               Header802_3[14];
 174         ULONG               FrameLen = 0;
 175         EAPOL_PACKET        Packet;
 176         UCHAR               Mic[16];
 177     BOOLEAN             bUnicast;
 178
 179         DBGPRINT(RT_DEBUG_TRACE, ("WpaMicFailureReportFrame ----->\n"));
 180
 181     bUnicast = (Elem->Msg[0] == 1 ? TRUE:FALSE);
 182         pAd->Sequence = ((pAd->Sequence) + 1) & (MAX_SEQ_NUMBER);
 183
 184         // init 802.3 header and Fill Packet
 185         MAKE_802_3_HEADER(Header802_3, pAd->CommonCfg.Bssid, pAd->CurrentAddress, EAPOL);
 186
 187         NdisZeroMemory(&Packet, sizeof(Packet));
 188         Packet.ProVer   = EAPOL_VER;
 189         Packet.ProType  = EAPOLKey;
 190
 191         Packet.KeyDesc.Type = WPA1_KEY_DESC;
 192
 193     // Request field presented
 194     Packet.KeyDesc.KeyInfo.Request = 1;
 195
 196         if(pAd->StaCfg.WepStatus  == Ndis802_11Encryption3Enabled)
 197         {
 198                 Packet.KeyDesc.KeyInfo.KeyDescVer = 2;
 199         }
 200         else      // TKIP
 201         {
 202                 Packet.KeyDesc.KeyInfo.KeyDescVer = 1;
 203         }
 204
 205     Packet.KeyDesc.KeyInfo.KeyType = (bUnicast ? PAIRWISEKEY : GROUPKEY);
 206
 207         // KeyMic field presented
 208         Packet.KeyDesc.KeyInfo.KeyMic  = 1;
 209
 210     // Error field presented
 211         Packet.KeyDesc.KeyInfo.Error  = 1;
 212
 213         // Update packet length after decide Key data payload
 214         SET_UINT16_TO_ARRARY(Packet.Body_Len, LEN_EAPOL_KEY_MSG)
 215
 216         // Key Replay Count
 217         NdisMoveMemory(Packet.KeyDesc.ReplayCounter, pAd->StaCfg.ReplayCounter, LEN_KEY_DESC_REPLAY);
 218     inc_byte_array(pAd->StaCfg.ReplayCounter, 8);
 219
 220         // Convert to little-endian format.
 221         *((USHORT *)&Packet.KeyDesc.KeyInfo) = cpu2le16(*((USHORT *)&Packet.KeyDesc.KeyInfo));
 222
 223
 224         MlmeAllocateMemory(pAd, (PUCHAR *)&pOutBuffer);  // allocate memory
 225         if(pOutBuffer == NULL)
 226         {
 227                 return;
 228         }
 229
 230         // Prepare EAPOL frame for MIC calculation
 231         // Be careful, only EAPOL frame is counted for MIC calculation
 232         MakeOutgoingFrame(pOutBuffer,               &FrameLen,
 233                               CONV_ARRARY_TO_UINT16(Packet.Body_Len) + 4,   &Packet,
 234                               END_OF_ARGS);
 235
 236         // Prepare and Fill MIC value
 237         NdisZeroMemory(Mic, sizeof(Mic));
 238         if(pAd->StaCfg.WepStatus  == Ndis802_11Encryption3Enabled)
 239         {       // AES
 240         UCHAR digest[20] = {0};
 241                 HMAC_SHA1(pAd->StaCfg.PTK, LEN_EAP_MICK, pOutBuffer, FrameLen, digest, SHA1_DIGEST_SIZE);
 242                 NdisMoveMemory(Mic, digest, LEN_KEY_DESC_MIC);
 243         }
 244         else
 245         {       // TKIP
 246                 HMAC_MD5(pAd->StaCfg.PTK,  LEN_EAP_MICK, pOutBuffer, FrameLen, Mic, MD5_DIGEST_SIZE);
 247         }
 248         NdisMoveMemory(Packet.KeyDesc.KeyMic, Mic, LEN_KEY_DESC_MIC);
 249
 250         // copy frame to Tx ring and send MIC failure report frame to authenticator
 251         RTMPToWirelessSta(pAd, &pAd->MacTab.Content[BSSID_WCID],
 252                                           Header802_3, LENGTH_802_3,
 253                                           (PUCHAR)&Packet,
 254                                           CONV_ARRARY_TO_UINT16(Packet.Body_Len) + 4, FALSE);
 255
 256         MlmeFreeMemory(pAd, (PUCHAR)pOutBuffer);
 257
 258         DBGPRINT(RT_DEBUG_TRACE, ("WpaMicFailureReportFrame <-----\n"));
 259 }
 260
 261 /** from wpa_supplicant
 262  * inc_byte_array - Increment arbitrary length byte array by one
 263  * @counter: Pointer to byte array
 264  * @len: Length of the counter in bytes
 265  *
 266  * This function increments the last byte of the counter by one and continues
 267  * rolling over to more significant bytes if the byte was incremented from
 268  * 0xff to 0x00.
 269  */
 270 void inc_byte_array(UCHAR *counter, int len)
 271 {
 272         int pos = len - 1;
 273         while (pos >= 0) {
 274                 counter[pos]++;
 275                 if (counter[pos] != 0)
 276                         break;
 277                 pos--;
 278         }
 279 }
 280
 281 VOID WpaDisassocApAndBlockAssoc(
 282     IN PVOID SystemSpecific1,
 283     IN PVOID FunctionContext,
 284     IN PVOID SystemSpecific2,
 285     IN PVOID SystemSpecific3)
 286 {
 287     RTMP_ADAPTER                *pAd = (PRTMP_ADAPTER)FunctionContext;
 288     MLME_DISASSOC_REQ_STRUCT    DisassocReq;
 289
 290         // disassoc from current AP first
 291         DBGPRINT(RT_DEBUG_TRACE, ("RTMPReportMicError - disassociate with current AP after sending second continuous EAPOL frame\n"));
 292         DisassocParmFill(pAd, &DisassocReq, pAd->CommonCfg.Bssid, REASON_MIC_FAILURE);
 293         MlmeEnqueue(pAd, ASSOC_STATE_MACHINE, MT2_MLME_DISASSOC_REQ, sizeof(MLME_DISASSOC_REQ_STRUCT), &DisassocReq);
 294
 295         pAd->Mlme.CntlMachine.CurrState = CNTL_WAIT_DISASSOC;
 296         pAd->StaCfg.bBlockAssoc = TRUE;
 297 }
 298
 299 VOID WpaStaPairwiseKeySetting(
 300         IN      PRTMP_ADAPTER   pAd)
 301 {
 302         PCIPHER_KEY pSharedKey;
 303         PMAC_TABLE_ENTRY pEntry;
 304
 305         pEntry = &pAd->MacTab.Content[BSSID_WCID];
 306
 307         // Pairwise key shall use key#0
 308         pSharedKey = &pAd->SharedKey[BSS0][0];
 309
 310         NdisMoveMemory(pAd->StaCfg.PTK, pEntry->PTK, LEN_PTK);
 311
 312         // Prepare pair-wise key information into shared key table
 313         NdisZeroMemory(pSharedKey, sizeof(CIPHER_KEY));
 314         pSharedKey->KeyLen = LEN_TKIP_EK;
 315     NdisMoveMemory(pSharedKey->Key, &pAd->StaCfg.PTK[32], LEN_TKIP_EK);
 316         NdisMoveMemory(pSharedKey->RxMic, &pAd->StaCfg.PTK[48], LEN_TKIP_RXMICK);
 317         NdisMoveMemory(pSharedKey->TxMic, &pAd->StaCfg.PTK[48+LEN_TKIP_RXMICK], LEN_TKIP_TXMICK);
 318
 319         // Decide its ChiperAlg
 320         if (pAd->StaCfg.PairCipher == Ndis802_11Encryption2Enabled)
 321                 pSharedKey->CipherAlg = CIPHER_TKIP;
 322         else if (pAd->StaCfg.PairCipher == Ndis802_11Encryption3Enabled)
 323                 pSharedKey->CipherAlg = CIPHER_AES;
 324         else
 325                 pSharedKey->CipherAlg = CIPHER_NONE;
 326
 327         // Update these related information to MAC_TABLE_ENTRY
 328         NdisMoveMemory(pEntry->PairwiseKey.Key, &pAd->StaCfg.PTK[32], LEN_TKIP_EK);
 329         NdisMoveMemory(pEntry->PairwiseKey.RxMic, &pAd->StaCfg.PTK[48], LEN_TKIP_RXMICK);
 330         NdisMoveMemory(pEntry->PairwiseKey.TxMic, &pAd->StaCfg.PTK[48+LEN_TKIP_RXMICK], LEN_TKIP_TXMICK);
 331         pEntry->PairwiseKey.CipherAlg = pSharedKey->CipherAlg;
 332
 333         // Update pairwise key information to ASIC Shared Key Table
 334         AsicAddSharedKeyEntry(pAd,
 335                                                   BSS0,
 336                                                   0,
 337                                                   pSharedKey->CipherAlg,
 338                                                   pSharedKey->Key,
 339                                                   pSharedKey->TxMic,
 340                                                   pSharedKey->RxMic);
 341
 342         // Update ASIC WCID attribute table and IVEIV table
 343         RTMPAddWcidAttributeEntry(pAd,
 344                                                           BSS0,
 345                                                           0,
 346                                                           pSharedKey->CipherAlg,
 347                                                           pEntry);
 348         STA_PORT_SECURED(pAd);
 349         pAd->IndicateMediaState = NdisMediaStateConnected;
 350
 351         DBGPRINT(RT_DEBUG_TRACE, ("%s : AID(%d) port secured\n", __FUNCTION__, pEntry->Aid));
 352
 353 }
 354
 355 VOID WpaStaGroupKeySetting(
 356         IN      PRTMP_ADAPTER   pAd)
 357 {
 358         PCIPHER_KEY             pSharedKey;
 359
 360         pSharedKey = &pAd->SharedKey[BSS0][pAd->StaCfg.DefaultKeyId];
 361
 362         // Prepare pair-wise key information into shared key table
 363         NdisZeroMemory(pSharedKey, sizeof(CIPHER_KEY));
 364         pSharedKey->KeyLen = LEN_TKIP_EK;
 365         NdisMoveMemory(pSharedKey->Key, pAd->StaCfg.GTK, LEN_TKIP_EK);
 366         NdisMoveMemory(pSharedKey->RxMic, &pAd->StaCfg.GTK[16], LEN_TKIP_RXMICK);
 367         NdisMoveMemory(pSharedKey->TxMic, &pAd->StaCfg.GTK[24], LEN_TKIP_TXMICK);
 368
 369         // Update Shared Key CipherAlg
 370         pSharedKey->CipherAlg = CIPHER_NONE;
 371         if (pAd->StaCfg.GroupCipher == Ndis802_11Encryption2Enabled)
 372                 pSharedKey->CipherAlg = CIPHER_TKIP;
 373         else if (pAd->StaCfg.GroupCipher == Ndis802_11Encryption3Enabled)
 374                 pSharedKey->CipherAlg = CIPHER_AES;
 375         else if (pAd->StaCfg.GroupCipher == Ndis802_11GroupWEP40Enabled)
 376                 pSharedKey->CipherAlg = CIPHER_WEP64;
 377         else if (pAd->StaCfg.GroupCipher == Ndis802_11GroupWEP104Enabled)
 378                 pSharedKey->CipherAlg = CIPHER_WEP128;
 379
 380         // Update group key information to ASIC Shared Key Table
 381         AsicAddSharedKeyEntry(pAd,
 382                                                   BSS0,
 383                                                   pAd->StaCfg.DefaultKeyId,
 384                                                   pSharedKey->CipherAlg,
 385                                                   pSharedKey->Key,
 386                                                   pSharedKey->TxMic,
 387                                                   pSharedKey->RxMic);
 388
 389         // Update ASIC WCID attribute table and IVEIV table
 390         RTMPAddWcidAttributeEntry(pAd,
 391                                                           BSS0,
 392                                                           pAd->StaCfg.DefaultKeyId,
 393                                                           pSharedKey->CipherAlg,
 394                                                           NULL);
 395
 396 }