drivers/staging/vt6655/wpa2.c

   1 /*
   2  * Copyright (c) 1996, 2003 VIA Networking Technologies, Inc.
   3  * All rights reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  *
  20  * File: wpa2.c
  21  *
  22  * Purpose: Handles the Basic Service Set & Node Database functions
  23  *
  24  * Functions:
  25  *
  26  * Revision History:
  27  *
  28  * Author: Yiching Chen
  29  *
  30  * Date: Oct. 4, 2004
  31  *
  32  */
  33
  34 #include "wpa2.h"
  35 #include "device.h"
  36 #include "wmgr.h"
  37
  38 /*---------------------  Static Definitions -------------------------*/
  39 static int msglevel = MSG_LEVEL_INFO;
  40 //static int          msglevel                =MSG_LEVEL_DEBUG;
  41 /*---------------------  Static Classes  ----------------------------*/
  42
  43 /*---------------------  Static Variables  --------------------------*/
  44
  45 const unsigned char abyOUIGK[4]      = { 0x00, 0x0F, 0xAC, 0x00 };
  46 const unsigned char abyOUIWEP40[4]   = { 0x00, 0x0F, 0xAC, 0x01 };
  47 const unsigned char abyOUIWEP104[4]  = { 0x00, 0x0F, 0xAC, 0x05 };
  48 const unsigned char abyOUITKIP[4]    = { 0x00, 0x0F, 0xAC, 0x02 };
  49 const unsigned char abyOUICCMP[4]    = { 0x00, 0x0F, 0xAC, 0x04 };
  50
  51 const unsigned char abyOUI8021X[4]   = { 0x00, 0x0F, 0xAC, 0x01 };
  52 const unsigned char abyOUIPSK[4]     = { 0x00, 0x0F, 0xAC, 0x02 };
  53
  54 /*---------------------  Static Functions  --------------------------*/
  55
  56 /*---------------------  Export Variables  --------------------------*/
  57
  58 /*---------------------  Export Functions  --------------------------*/
  59
  60 /*+
  61  *
  62  * Description:
  63  *    Clear RSN information in BSSList.
  64  *
  65  * Parameters:
  66  *  In:
  67  *      pBSSNode - BSS list.
  68  *  Out:
  69  *      none
  70  *
  71  * Return Value: none.
  72  *
  73  -*/
  74 void
  75 WPA2_ClearRSN(
  76         PKnownBSS        pBSSNode
  77 )
  78 {
  79         int ii;
  80
  81         pBSSNode->bWPA2Valid = false;
  82
  83         pBSSNode->byCSSGK = WLAN_11i_CSS_CCMP;
  84         for (ii = 0; ii < 4; ii++)
  85                 pBSSNode->abyCSSPK[ii] = WLAN_11i_CSS_CCMP;
  86         pBSSNode->wCSSPKCount = 1;
  87         for (ii = 0; ii < 4; ii++)
  88                 pBSSNode->abyAKMSSAuthType[ii] = WLAN_11i_AKMSS_802_1X;
  89         pBSSNode->wAKMSSAuthCount = 1;
  90         pBSSNode->sRSNCapObj.bRSNCapExist = false;
  91         pBSSNode->sRSNCapObj.wRSNCap = 0;
  92 }
  93
  94 /*+
  95  *
  96  * Description:
  97  *    Parse RSN IE.
  98  *
  99  * Parameters:
 100  *  In:
 101  *      pBSSNode - BSS list.
 102  *      pRSN - Pointer to the RSN IE.
 103  *  Out:
 104  *      none
 105  *
 106  * Return Value: none.
 107  *
 108  -*/
 109 void
 110 WPA2vParseRSN(
 111         PKnownBSS        pBSSNode,
 112         PWLAN_IE_RSN     pRSN
 113 )
 114 {
 115         int                 i, j;
 116         unsigned short m = 0, n = 0;
 117         unsigned char *pbyOUI;
 118         bool bUseGK = false;
 119
 120         DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO "WPA2_ParseRSN: [%d]\n", pRSN->len);
 121
 122         WPA2_ClearRSN(pBSSNode);
 123
 124         if (pRSN->len == 2) { // ver(2)
 125                 if ((pRSN->byElementID == WLAN_EID_RSN) && (pRSN->wVersion == 1)) {
 126                         pBSSNode->bWPA2Valid = true;
 127                 }
 128                 return;
 129         }
 130
 131         if (pRSN->len < 6) { // ver(2) + GK(4)
 132                 // invalid CSS, P802.11i/D10.0, p31
 133                 return;
 134         }
 135
 136         // information element header makes sense
 137         if ((pRSN->byElementID == WLAN_EID_RSN) &&
 138             (pRSN->wVersion == 1)) {
 139                 DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO "Legal 802.11i RSN\n");
 140
 141                 pbyOUI = &(pRSN->abyRSN[0]);
 142                 if (!memcmp(pbyOUI, abyOUIWEP40, 4))
 143                         pBSSNode->byCSSGK = WLAN_11i_CSS_WEP40;
 144                 else if (!memcmp(pbyOUI, abyOUITKIP, 4))
 145                         pBSSNode->byCSSGK = WLAN_11i_CSS_TKIP;
 146                 else if (!memcmp(pbyOUI, abyOUICCMP, 4))
 147                         pBSSNode->byCSSGK = WLAN_11i_CSS_CCMP;
 148                 else if (!memcmp(pbyOUI, abyOUIWEP104, 4))
 149                         pBSSNode->byCSSGK = WLAN_11i_CSS_WEP104;
 150                 else if (!memcmp(pbyOUI, abyOUIGK, 4)) {
 151                         // invalid CSS, P802.11i/D10.0, p32
 152                         return;
 153                 } else
 154                         // any vendor checks here
 155                         pBSSNode->byCSSGK = WLAN_11i_CSS_UNKNOWN;
 156
 157                 DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO "802.11i CSS: %X\n", pBSSNode->byCSSGK);
 158
 159                 if (pRSN->len == 6) {
 160                         pBSSNode->bWPA2Valid = true;
 161                         return;
 162                 }
 163
 164                 if (pRSN->len >= 8) { // ver(2) + GK(4) + PK count(2)
 165                         pBSSNode->wCSSPKCount = *((unsigned short *)&(pRSN->abyRSN[4]));
 166                         j = 0;
 167                         pbyOUI = &(pRSN->abyRSN[6]);
 168
 169                         for (i = 0; (i < pBSSNode->wCSSPKCount) && (j < sizeof(pBSSNode->abyCSSPK)/sizeof(unsigned char)); i++) {
 170                                 if (pRSN->len >= 8+i*4+4) { // ver(2)+GK(4)+PKCnt(2)+PKS(4*i)
 171                                         if (!memcmp(pbyOUI, abyOUIGK, 4)) {
 172                                                 pBSSNode->abyCSSPK[j++] = WLAN_11i_CSS_USE_GROUP;
 173                                                 bUseGK = true;
 174                                         } else if (!memcmp(pbyOUI, abyOUIWEP40, 4)) {
 175                                                 // Invalid CSS, continue to parsing
 176                                         } else if (!memcmp(pbyOUI, abyOUITKIP, 4)) {
 177                                                 if (pBSSNode->byCSSGK != WLAN_11i_CSS_CCMP)
 178                                                         pBSSNode->abyCSSPK[j++] = WLAN_11i_CSS_TKIP;
 179                                                 else
 180                                                         ; // Invalid CSS, continue to parsing
 181                                         } else if (!memcmp(pbyOUI, abyOUICCMP, 4)) {
 182                                                 pBSSNode->abyCSSPK[j++] = WLAN_11i_CSS_CCMP;
 183                                         } else if (!memcmp(pbyOUI, abyOUIWEP104, 4)) {
 184                                                 // Invalid CSS, continue to parsing
 185                                         } else {
 186                                                 // any vendor checks here
 187                                                 pBSSNode->abyCSSPK[j++] = WLAN_11i_CSS_UNKNOWN;
 188                                         }
 189                                         pbyOUI += 4;
 190                                         DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO "abyCSSPK[%d]: %X\n", j-1, pBSSNode->abyCSSPK[j-1]);
 191                                 } else
 192                                         break;
 193                         } //for
 194
 195                         if (bUseGK == true) {
 196                                 if (j != 1) {
 197                                         // invalid CSS, This should be only PK CSS.
 198                                         return;
 199                                 }
 200                                 if (pBSSNode->byCSSGK == WLAN_11i_CSS_CCMP) {
 201                                         // invalid CSS, If CCMP is enable , PK can't be CSSGK.
 202                                         return;
 203                                 }
 204                         }
 205                         if ((pBSSNode->wCSSPKCount != 0) && (j == 0)) {
 206                                 // invalid CSS, No valid PK.
 207                                 return;
 208                         }
 209                         pBSSNode->wCSSPKCount = (unsigned short)j;
 210                         DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO "wCSSPKCount: %d\n", pBSSNode->wCSSPKCount);
 211                 }
 212
 213                 m = *((unsigned short *)&(pRSN->abyRSN[4]));
 214
 215                 if (pRSN->len >= 10+m*4) { // ver(2) + GK(4) + PK count(2) + PKS(4*m) + AKMSS count(2)
 216                         pBSSNode->wAKMSSAuthCount = *((unsigned short *)&(pRSN->abyRSN[6+4*m]));
 217                         j = 0;
 218                         pbyOUI = &(pRSN->abyRSN[8+4*m]);
 219                         for (i = 0; (i < pBSSNode->wAKMSSAuthCount) && (j < sizeof(pBSSNode->abyAKMSSAuthType)/sizeof(unsigned char)); i++) {
 220                                 if (pRSN->len >= 10+(m+i)*4+4) { // ver(2)+GK(4)+PKCnt(2)+PKS(4*m)+AKMSS(2)+AKS(4*i)
 221                                         if (!memcmp(pbyOUI, abyOUI8021X, 4))
 222                                                 pBSSNode->abyAKMSSAuthType[j++] = WLAN_11i_AKMSS_802_1X;
 223                                         else if (!memcmp(pbyOUI, abyOUIPSK, 4))
 224                                                 pBSSNode->abyAKMSSAuthType[j++] = WLAN_11i_AKMSS_PSK;
 225                                         else
 226                                                 // any vendor checks here
 227                                                 pBSSNode->abyAKMSSAuthType[j++] = WLAN_11i_AKMSS_UNKNOWN;
 228                                         DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO "abyAKMSSAuthType[%d]: %X\n", j-1, pBSSNode->abyAKMSSAuthType[j-1]);
 229                                 } else
 230                                         break;
 231                         }
 232                         pBSSNode->wAKMSSAuthCount = (unsigned short)j;
 233                         DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO "wAKMSSAuthCount: %d\n", pBSSNode->wAKMSSAuthCount);
 234
 235                         n = *((unsigned short *)&(pRSN->abyRSN[6+4*m]));
 236                         if (pRSN->len >= 12 + 4 * m + 4 * n) { // ver(2)+GK(4)+PKCnt(2)+PKS(4*m)+AKMSSCnt(2)+AKMSS(4*n)+Cap(2)
 237                                 pBSSNode->sRSNCapObj.bRSNCapExist = true;
 238                                 pBSSNode->sRSNCapObj.wRSNCap = *((unsigned short *)&(pRSN->abyRSN[8+4*m+4*n]));
 239                         }
 240                 }
 241                 //ignore PMKID lists bcs only (Re)Assocrequest has this field
 242                 pBSSNode->bWPA2Valid = true;
 243         }
 244 }
 245
 246 /*+
 247  *
 248  * Description:
 249  *    Set WPA IEs
 250  *
 251  * Parameters:
 252  *  In:
 253  *      pMgmtHandle - Pointer to management object
 254  *  Out:
 255  *      pRSNIEs     - Pointer to the RSN IE to set.
 256  *
 257  * Return Value: length of IEs.
 258  *
 259  -*/
 260 unsigned int
 261 WPA2uSetIEs(
 262         void *pMgmtHandle,
 263         PWLAN_IE_RSN pRSNIEs
 264 )
 265 {
 266         PSMgmtObject    pMgmt = (PSMgmtObject) pMgmtHandle;
 267         unsigned char *pbyBuffer = NULL;
 268         unsigned int ii = 0;
 269         unsigned short *pwPMKID = NULL;
 270
 271         if (pRSNIEs == NULL) {
 272                 return 0;
 273         }
 274         if (((pMgmt->eAuthenMode == WMAC_AUTH_WPA2) ||
 275              (pMgmt->eAuthenMode == WMAC_AUTH_WPA2PSK)) &&
 276             (pMgmt->pCurrBSS != NULL)) {
 277                 /* WPA2 IE */
 278                 pbyBuffer = (unsigned char *)pRSNIEs;
 279                 pRSNIEs->byElementID = WLAN_EID_RSN;
 280                 pRSNIEs->len = 6; //Version(2)+GK(4)
 281                 pRSNIEs->wVersion = 1;
 282                 //Group Key Cipher Suite
 283                 pRSNIEs->abyRSN[0] = 0x00;
 284                 pRSNIEs->abyRSN[1] = 0x0F;
 285                 pRSNIEs->abyRSN[2] = 0xAC;
 286                 if (pMgmt->byCSSGK == KEY_CTL_WEP) {
 287                         pRSNIEs->abyRSN[3] = pMgmt->pCurrBSS->byCSSGK;
 288                 } else if (pMgmt->byCSSGK == KEY_CTL_TKIP) {
 289                         pRSNIEs->abyRSN[3] = WLAN_11i_CSS_TKIP;
 290                 } else if (pMgmt->byCSSGK == KEY_CTL_CCMP) {
 291                         pRSNIEs->abyRSN[3] = WLAN_11i_CSS_CCMP;
 292                 } else {
 293                         pRSNIEs->abyRSN[3] = WLAN_11i_CSS_UNKNOWN;
 294                 }
 295
 296                 // Pairwise Key Cipher Suite
 297                 pRSNIEs->abyRSN[4] = 1;
 298                 pRSNIEs->abyRSN[5] = 0;
 299                 pRSNIEs->abyRSN[6] = 0x00;
 300                 pRSNIEs->abyRSN[7] = 0x0F;
 301                 pRSNIEs->abyRSN[8] = 0xAC;
 302                 if (pMgmt->byCSSPK == KEY_CTL_TKIP) {
 303                         pRSNIEs->abyRSN[9] = WLAN_11i_CSS_TKIP;
 304                 } else if (pMgmt->byCSSPK == KEY_CTL_CCMP) {
 305                         pRSNIEs->abyRSN[9] = WLAN_11i_CSS_CCMP;
 306                 } else if (pMgmt->byCSSPK == KEY_CTL_NONE) {
 307                         pRSNIEs->abyRSN[9] = WLAN_11i_CSS_USE_GROUP;
 308                 } else {
 309                         pRSNIEs->abyRSN[9] = WLAN_11i_CSS_UNKNOWN;
 310                 }
 311                 pRSNIEs->len += 6;
 312
 313                 // Auth Key Management Suite
 314                 pRSNIEs->abyRSN[10] = 1;
 315                 pRSNIEs->abyRSN[11] = 0;
 316                 pRSNIEs->abyRSN[12] = 0x00;
 317                 pRSNIEs->abyRSN[13] = 0x0F;
 318                 pRSNIEs->abyRSN[14] = 0xAC;
 319                 if (pMgmt->eAuthenMode == WMAC_AUTH_WPA2PSK) {
 320                         pRSNIEs->abyRSN[15] = WLAN_11i_AKMSS_PSK;
 321                 } else if (pMgmt->eAuthenMode == WMAC_AUTH_WPA2) {
 322                         pRSNIEs->abyRSN[15] = WLAN_11i_AKMSS_802_1X;
 323                 } else {
 324                         pRSNIEs->abyRSN[15] = WLAN_11i_AKMSS_UNKNOWN;
 325                 }
 326                 pRSNIEs->len += 6;
 327
 328                 // RSN Capabilities
 329                 if (pMgmt->pCurrBSS->sRSNCapObj.bRSNCapExist == true) {
 330                         memcpy(&pRSNIEs->abyRSN[16], &pMgmt->pCurrBSS->sRSNCapObj.wRSNCap, 2);
 331                 } else {
 332                         pRSNIEs->abyRSN[16] = 0;
 333                         pRSNIEs->abyRSN[17] = 0;
 334                 }
 335                 pRSNIEs->len += 2;
 336
 337                 if ((pMgmt->gsPMKIDCache.BSSIDInfoCount > 0) &&
 338                     (pMgmt->bRoaming == true) &&
 339                     (pMgmt->eAuthenMode == WMAC_AUTH_WPA2)) {
 340                         // RSN PMKID
 341                         pwPMKID = (unsigned short *)(&pRSNIEs->abyRSN[18]);  // Point to PMKID count
 342                         *pwPMKID = 0;                               // Initialize PMKID count
 343                         pbyBuffer = &pRSNIEs->abyRSN[20];           // Point to PMKID list
 344                         for (ii = 0; ii < pMgmt->gsPMKIDCache.BSSIDInfoCount; ii++) {
 345                                 if (!memcmp(&pMgmt->gsPMKIDCache.BSSIDInfo[ii].abyBSSID[0], pMgmt->abyCurrBSSID, ETH_ALEN)) {
 346                                         (*pwPMKID)++;
 347                                         memcpy(pbyBuffer, pMgmt->gsPMKIDCache.BSSIDInfo[ii].abyPMKID, 16);
 348                                         pbyBuffer += 16;
 349                                 }
 350                         }
 351                         if (*pwPMKID != 0) {
 352                                 pRSNIEs->len += (2 + (*pwPMKID)*16);
 353                         } else {
 354                                 pbyBuffer = &pRSNIEs->abyRSN[18];
 355                         }
 356                 }
 357                 return pRSNIEs->len + WLAN_IEHDR_LEN;
 358         }
 359         return 0;
 360 }