| /* |
| * Copyright (c) 1996, 2003 VIA Networking Technologies, Inc. |
| * All rights reserved. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License along |
| * with this program; if not, write to the Free Software Foundation, Inc., |
| * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * |
| * File: wpa.c |
| * |
| * Purpose: Handles the Basic Service Set & Node Database functions |
| * |
| * Functions: |
| * WPA_ParseRSN - Parse RSN IE. |
| * |
| * Revision History: |
| * |
| * Author: Kyle Hsu |
| * |
| * Date: July 14, 2003 |
| * |
| */ |
| |
| #include "ttype.h" |
| #include "tmacro.h" |
| #include "tether.h" |
| #include "device.h" |
| #include "80211hdr.h" |
| #include "bssdb.h" |
| #include "wmgr.h" |
| #include "wpa.h" |
| #include "80211mgr.h" |
| |
| /*--------------------- Static Variables --------------------------*/ |
| static int msglevel =MSG_LEVEL_INFO; |
| |
| const unsigned char abyOUI00[4] = { 0x00, 0x50, 0xf2, 0x00 }; |
| const unsigned char abyOUI01[4] = { 0x00, 0x50, 0xf2, 0x01 }; |
| const unsigned char abyOUI02[4] = { 0x00, 0x50, 0xf2, 0x02 }; |
| const unsigned char abyOUI03[4] = { 0x00, 0x50, 0xf2, 0x03 }; |
| const unsigned char abyOUI04[4] = { 0x00, 0x50, 0xf2, 0x04 }; |
| const unsigned char abyOUI05[4] = { 0x00, 0x50, 0xf2, 0x05 }; |
| |
| |
| /*+ |
| * |
| * Description: |
| * Clear RSN information in BSSList. |
| * |
| * Parameters: |
| * In: |
| * pBSSList - BSS list. |
| * Out: |
| * none |
| * |
| * Return Value: none. |
| * |
| -*/ |
| |
| void |
| WPA_ClearRSN ( |
| PKnownBSS pBSSList |
| ) |
| { |
| int ii; |
| pBSSList->byGKType = WPA_TKIP; |
| for (ii=0; ii < 4; ii ++) |
| pBSSList->abyPKType[ii] = WPA_TKIP; |
| pBSSList->wPKCount = 0; |
| for (ii=0; ii < 4; ii ++) |
| pBSSList->abyAuthType[ii] = WPA_AUTH_IEEE802_1X; |
| pBSSList->wAuthCount = 0; |
| pBSSList->byDefaultK_as_PK = 0; |
| pBSSList->byReplayIdx = 0; |
| pBSSList->sRSNCapObj.bRSNCapExist = false; |
| pBSSList->sRSNCapObj.wRSNCap = 0; |
| pBSSList->bWPAValid = false; |
| } |
| |
| |
| /*+ |
| * |
| * Description: |
| * Parse RSN IE. |
| * |
| * Parameters: |
| * In: |
| * pBSSList - BSS list. |
| * pRSN - Pointer to the RSN IE. |
| * Out: |
| * none |
| * |
| * Return Value: none. |
| * |
| -*/ |
| void |
| WPA_ParseRSN ( |
| PKnownBSS pBSSList, |
| PWLAN_IE_RSN_EXT pRSN |
| ) |
| { |
| PWLAN_IE_RSN_AUTH pIE_RSN_Auth = NULL; |
| int i, j, m, n = 0; |
| unsigned char *pbyCaps; |
| |
| WPA_ClearRSN(pBSSList); |
| |
| DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"WPA_ParseRSN: [%d]\n", pRSN->len); |
| |
| // information element header makes sense |
| if ((pRSN->len >= 6) // oui1(4)+ver(2) |
| && (pRSN->byElementID == WLAN_EID_RSN_WPA) && !memcmp(pRSN->abyOUI, abyOUI01, 4) |
| && (pRSN->wVersion == 1)) { |
| |
| DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"Legal RSN\n"); |
| // update each variable if pRSN is long enough to contain the variable |
| if (pRSN->len >= 10) //oui1(4)+ver(2)+GKSuite(4) |
| { |
| if ( !memcmp(pRSN->abyMulticast, abyOUI01, 4)) |
| pBSSList->byGKType = WPA_WEP40; |
| else if ( !memcmp(pRSN->abyMulticast, abyOUI02, 4)) |
| pBSSList->byGKType = WPA_TKIP; |
| else if ( !memcmp(pRSN->abyMulticast, abyOUI03, 4)) |
| pBSSList->byGKType = WPA_AESWRAP; |
| else if ( !memcmp(pRSN->abyMulticast, abyOUI04, 4)) |
| pBSSList->byGKType = WPA_AESCCMP; |
| else if ( !memcmp(pRSN->abyMulticast, abyOUI05, 4)) |
| pBSSList->byGKType = WPA_WEP104; |
| else |
| // any vendor checks here |
| pBSSList->byGKType = WPA_NONE; |
| |
| DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"byGKType: %x\n", pBSSList->byGKType); |
| } |
| |
| if (pRSN->len >= 12) //oui1(4)+ver(2)+GKS(4)+PKSCnt(2) |
| { |
| j = 0; |
| DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"wPKCount: %d, sizeof(pBSSList->abyPKType): %zu\n", pRSN->wPKCount, sizeof(pBSSList->abyPKType)); |
| for(i = 0; (i < pRSN->wPKCount) && (j < ARRAY_SIZE(pBSSList->abyPKType)); i++) { |
| if(pRSN->len >= 12+i*4+4) { //oui1(4)+ver(2)+GKS(4)+PKSCnt(2)+PKS(4*i) |
| if ( !memcmp(pRSN->PKSList[i].abyOUI, abyOUI00, 4)) |
| pBSSList->abyPKType[j++] = WPA_NONE; |
| else if ( !memcmp(pRSN->PKSList[i].abyOUI, abyOUI02, 4)) |
| pBSSList->abyPKType[j++] = WPA_TKIP; |
| else if ( !memcmp(pRSN->PKSList[i].abyOUI, abyOUI03, 4)) |
| pBSSList->abyPKType[j++] = WPA_AESWRAP; |
| else if ( !memcmp(pRSN->PKSList[i].abyOUI, abyOUI04, 4)) |
| pBSSList->abyPKType[j++] = WPA_AESCCMP; |
| else |
| // any vendor checks here |
| ; |
| } |
| else |
| break; |
| //DBG_PRN_GRP14(("abyPKType[%d]: %X\n", j-1, pBSSList->abyPKType[j-1])); |
| } //for |
| pBSSList->wPKCount = (unsigned short)j; |
| DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"wPKCount: %d\n", pBSSList->wPKCount); |
| } |
| |
| m = pRSN->wPKCount; |
| DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"m: %d\n", m); |
| DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"14+m*4: %d\n", 14+m*4); |
| |
| if (pRSN->len >= 14+m*4) { //oui1(4)+ver(2)+GKS(4)+PKSCnt(2)+PKS(4*m)+AKC(2) |
| // overlay IE_RSN_Auth structure into correct place |
| pIE_RSN_Auth = (PWLAN_IE_RSN_AUTH) pRSN->PKSList[m].abyOUI; |
| j = 0; |
| DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"wAuthCount: %d, sizeof(pBSSList->abyAuthType): %zu\n", |
| pIE_RSN_Auth->wAuthCount, sizeof(pBSSList->abyAuthType)); |
| for(i = 0; (i < pIE_RSN_Auth->wAuthCount) && (j < ARRAY_SIZE(pBSSList->abyAuthType)); i++) { |
| if(pRSN->len >= 14+4+(m+i)*4) { //oui1(4)+ver(2)+GKS(4)+PKSCnt(2)+PKS(4*m)+AKC(2)+AKS(4*i) |
| if ( !memcmp(pIE_RSN_Auth->AuthKSList[i].abyOUI, abyOUI01, 4)) |
| pBSSList->abyAuthType[j++] = WPA_AUTH_IEEE802_1X; |
| else if ( !memcmp(pIE_RSN_Auth->AuthKSList[i].abyOUI, abyOUI02, 4)) |
| pBSSList->abyAuthType[j++] = WPA_AUTH_PSK; |
| else |
| // any vendor checks here |
| ; |
| } |
| else |
| break; |
| //DBG_PRN_GRP14(("abyAuthType[%d]: %X\n", j-1, pBSSList->abyAuthType[j-1])); |
| } |
| if(j > 0) |
| pBSSList->wAuthCount = (unsigned short)j; |
| DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"wAuthCount: %d\n", pBSSList->wAuthCount); |
| } |
| |
| if (pIE_RSN_Auth != NULL) { |
| |
| n = pIE_RSN_Auth->wAuthCount; |
| |
| DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"n: %d\n", n); |
| DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"14+4+(m+n)*4: %d\n", 14+4+(m+n)*4); |
| |
| if(pRSN->len+2 >= 14+4+(m+n)*4) { //oui1(4)+ver(2)+GKS(4)+PKSCnt(2)+PKS(4*m)+AKC(2)+AKS(4*n)+Cap(2) |
| pbyCaps = (unsigned char *)pIE_RSN_Auth->AuthKSList[n].abyOUI; |
| pBSSList->byDefaultK_as_PK = (*pbyCaps) & WPA_GROUPFLAG; |
| pBSSList->byReplayIdx = 2 << ((*pbyCaps >> WPA_REPLAYBITSSHIFT) & WPA_REPLAYBITS); |
| pBSSList->sRSNCapObj.bRSNCapExist = true; |
| pBSSList->sRSNCapObj.wRSNCap = *(unsigned short *)pbyCaps; |
| //DBG_PRN_GRP14(("pbyCaps: %X\n", *pbyCaps)); |
| //DBG_PRN_GRP14(("byDefaultK_as_PK: %X\n", pBSSList->byDefaultK_as_PK)); |
| //DBG_PRN_GRP14(("byReplayIdx: %X\n", pBSSList->byReplayIdx)); |
| } |
| } |
| pBSSList->bWPAValid = true; |
| } |
| } |
| |
| /*+ |
| * |
| * Description: |
| * Search RSN information in BSSList. |
| * |
| * Parameters: |
| * In: |
| * byCmd - Search type |
| * byEncrypt- Encrypt Type |
| * pBSSList - BSS list |
| * Out: |
| * none |
| * |
| * Return Value: none. |
| * |
| -*/ |
| bool |
| WPA_SearchRSN ( |
| unsigned char byCmd, |
| unsigned char byEncrypt, |
| PKnownBSS pBSSList |
| ) |
| { |
| int ii; |
| unsigned char byPKType = WPA_NONE; |
| |
| if (pBSSList->bWPAValid == false) |
| return false; |
| |
| switch(byCmd) { |
| case 0: |
| |
| if (byEncrypt != pBSSList->byGKType) |
| return false; |
| |
| if (pBSSList->wPKCount > 0) { |
| for (ii = 0; ii < pBSSList->wPKCount; ii ++) { |
| if (pBSSList->abyPKType[ii] == WPA_AESCCMP) |
| byPKType = WPA_AESCCMP; |
| else if ((pBSSList->abyPKType[ii] == WPA_TKIP) && (byPKType != WPA_AESCCMP)) |
| byPKType = WPA_TKIP; |
| else if ((pBSSList->abyPKType[ii] == WPA_WEP40) && (byPKType != WPA_AESCCMP) && (byPKType != WPA_TKIP)) |
| byPKType = WPA_WEP40; |
| else if ((pBSSList->abyPKType[ii] == WPA_WEP104) && (byPKType != WPA_AESCCMP) && (byPKType != WPA_TKIP)) |
| byPKType = WPA_WEP104; |
| } |
| if (byEncrypt != byPKType) |
| return false; |
| } |
| return true; |
| // if (pBSSList->wAuthCount > 0) |
| // for (ii=0; ii < pBSSList->wAuthCount; ii ++) |
| // if (byAuth == pBSSList->abyAuthType[ii]) |
| // break; |
| break; |
| |
| default: |
| break; |
| } |
| return false; |
| } |
| |
| /*+ |
| * |
| * Description: |
| * Check if RSN IE makes sense. |
| * |
| * Parameters: |
| * In: |
| * pRSN - Pointer to the RSN IE. |
| * Out: |
| * none |
| * |
| * Return Value: none. |
| * |
| -*/ |
| bool |
| WPAb_Is_RSN ( |
| PWLAN_IE_RSN_EXT pRSN |
| ) |
| { |
| if (pRSN == NULL) |
| return false; |
| |
| if ((pRSN->len >= 6) && // oui1(4)+ver(2) |
| (pRSN->byElementID == WLAN_EID_RSN_WPA) && !memcmp(pRSN->abyOUI, abyOUI01, 4) && |
| (pRSN->wVersion == 1)) { |
| return true; |
| } |
| else |
| return false; |
| } |
| |
