key.c

VIA VT6656 USB linux source code.

/*
 * Copyright (c) 1996, 2003 VIA Networking Technologies, Inc.
 * All rights reserved.
 *
 * This software is copyrighted by and is the sole property of
 * VIA Networking Technologies, Inc. This software may only be used
 * in accordance with the corresponding license agreement. Any unauthorized
 * use, duplication, transmission, distribution, or disclosure of this
 * software is expressly forbidden.
 *
 * This software is provided by VIA Networking Technologies, Inc. "as is"
 * and any express or implied warranties, including, but not limited to, the
 * implied warranties of merchantability and fitness for a particular purpose
 * are disclaimed. In no event shall VIA Networking Technologies, Inc.
 * be liable for any direct, indirect, incidental, special, exemplary, or
 * consequential damages.
 *
 *
 * File: key.c
 *
 * Purpose: Implement functions for 802.11i Key management
 *
 * Author: Jerry Chen
 *
 * Date: May 29, 2003
 *
 * Functions:
 *      KeyvInitTable - Init Key management table
 *      KeybGetKey - Get Key from table
 *      KeybSetKey - Set Key to table
 *      KeybRemoveKey - Remove Key from table
 *      KeybGetTransmitKey - Get Transmit Key from table
 *
 * Revision History:
 *
 */


#if !defined(__TMACRO_H__)
#include "tmacro.h"
#endif
#if !defined(__TBIT_H__)
#include "tbit.h"
#endif
#if !defined(__KEY_H__)
#include "key.h"
#endif
#if !defined(__UMEM_H__)
#include "umem.h"
#endif
#if !defined(__MAC_H__)
#include "mac.h"
#endif
#if !defined(__RNDIS_H__)
#include "rndis.h"
#endif
#if !defined(__CONTROL_H__)
#include "control.h"
#endif

/*---------------------  Static Definitions -------------------------*/

/*---------------------  Static Classes  ----------------------------*/

/*---------------------  Static Variables  --------------------------*/
static int          msglevel                =MSG_LEVEL_INFO;
//static int          msglevel                =MSG_LEVEL_DEBUG;
/*---------------------  Static Functions  --------------------------*/

/*---------------------  Export Variables  --------------------------*/

/*---------------------  Static Definitions -------------------------*/

/*---------------------  Static Classes  ----------------------------*/

/*---------------------  Static Variables  --------------------------*/

/*---------------------  Static Functions  --------------------------*/
static VOID
s_vCheckKeyTableValid (PVOID pDeviceHandler, PSKeyManagement pTable)
{
    PSDevice    pDevice = (PSDevice) pDeviceHandler;
    int         i;
    WORD        wLength = 0;
    BYTE        pbyData[MAX_KEY_TABLE];

    for (i=0;i<MAX_KEY_TABLE;i++) {
        if ((pTable->KeyTable[i].bInUse == TRUE) &&
            (pTable->KeyTable[i].PairwiseKey.bKeyValid == FALSE) &&
            (pTable->KeyTable[i].GroupKey[0].bKeyValid == FALSE) &&
            (pTable->KeyTable[i].GroupKey[1].bKeyValid == FALSE) &&
            (pTable->KeyTable[i].GroupKey[2].bKeyValid == FALSE) &&
            (pTable->KeyTable[i].GroupKey[3].bKeyValid == FALSE)
            ) {
            
            pTable->KeyTable[i].bInUse = FALSE;
            pTable->KeyTable[i].wKeyCtl = 0;
            pTable->KeyTable[i].bSoftWEP = FALSE;
            pbyData[wLength++] = (BYTE) i;
            //MACvDisableKeyEntry(pDevice, i);
        }
    }
    if ( wLength != 0 ) {
        CONTROLnsRequestOut(pDevice,
                            MESSAGE_TYPE_CLRKEYENTRY,
                            0,
                            0,
                            wLength,
                            pbyData
                            );
    }    

}


/*---------------------  Export Functions  --------------------------*/


/*
 * Description: Init Key management table
 *
 * Parameters:
 *  In:
 *      pTable          - Pointer to Key table
 *  Out:
 *      none
 *
 * Return Value: none
 *
 */
VOID KeyvInitTable(PVOID pDeviceHandler, PSKeyManagement pTable)
{
    PSDevice    pDevice = (PSDevice) pDeviceHandler;
    int i;
    int jj;
    BYTE       pbyData[MAX_KEY_TABLE+1];
    
    spin_lock_irq(&pDevice->lock);
    for (i=0;i<MAX_KEY_TABLE;i++) {
        pTable->KeyTable[i].bInUse = FALSE;
        pTable->KeyTable[i].PairwiseKey.bKeyValid = FALSE;
        pTable->KeyTable[i].PairwiseKey.pvKeyTable = (PVOID)&pTable->KeyTable[i];
        for (jj=0; jj < MAX_GROUP_KEY; jj++) {
            pTable->KeyTable[i].GroupKey[jj].bKeyValid = FALSE;
            pTable->KeyTable[i].GroupKey[jj].pvKeyTable = (PVOID) &(pTable->KeyTable[i]);
        }
        pTable->KeyTable[i].wKeyCtl = 0;
        pTable->KeyTable[i].dwGTKeyIndex = 0;
        pTable->KeyTable[i].bSoftWEP = FALSE;
        pbyData[i] = (BYTE) i;
    }
    pbyData[i] = (BYTE) i;
    CONTROLnsRequestOut(pDevice,
                        MESSAGE_TYPE_CLRKEYENTRY,
                        0,
                        0,
                        11,
                        pbyData
                        );    
                        
    spin_unlock_irq(&pDevice->lock);                        
    
    return;
}


/*
 * Description: Get Key from table
 *
 * Parameters:
 *  In:
 *      pTable          - Pointer to Key table
 *      pbyBSSID        - BSSID of Key
 *      dwKeyIndex      - Key Index (0xFFFFFFFF means pairwise key)
 *  Out:
 *      pKey            - Key return
 *
 * Return Value: TRUE if found otherwise FALSE
 *
 */
BOOL KeybGetKey (
    IN  PSKeyManagement pTable,
    IN  PBYTE           pbyBSSID,
    IN  DWORD           dwKeyIndex,
    OUT PSKeyItem       *pKey
    )
{
    int i;

    DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"KeybGetKey() \n");    

    *pKey = NULL;
    for (i=0;i<MAX_KEY_TABLE;i++) {
        if ((pTable->KeyTable[i].bInUse == TRUE) &&
            IS_ETH_ADDRESS_EQUAL(pTable->KeyTable[i].abyBSSID,pbyBSSID)) {
            if (dwKeyIndex == 0xFFFFFFFF) {
                if (pTable->KeyTable[i].PairwiseKey.bKeyValid == TRUE) {
                    *pKey = &(pTable->KeyTable[i].PairwiseKey);
                    return (TRUE);
                }
                else {
                    return (FALSE);
                }
            } else if (dwKeyIndex < MAX_GROUP_KEY) {
                if (pTable->KeyTable[i].GroupKey[dwKeyIndex].bKeyValid == TRUE) {
                    *pKey = &(pTable->KeyTable[i].GroupKey[dwKeyIndex]);
                    return (TRUE);
                }
                else {
                    return (FALSE);
                }
            }
            else {
                return (FALSE);
            }
        }
    }
    return (FALSE);
}


/*
 * Description: Set Key to table
 *
 * Parameters:
 *  In:
 *      pTable          - Pointer to Key table
 *      pbyBSSID        - BSSID of Key
 *      dwKeyIndex      - Key index (reference to NDIS DDK)
 *      uKeyLength      - Key length
 *      KeyRSC          - Key RSC
 *      pbyKey          - Pointer to key
 *  Out:
 *      none
 *
 * Return Value: TRUE if success otherwise FALSE
 *
 */
BOOL KeybSetKey (
    PVOID           pDeviceHandler,
    PSKeyManagement pTable,
    PBYTE           pbyBSSID,
    DWORD           dwKeyIndex,
    ULONG           uKeyLength,
    PQWORD          pKeyRSC,
    PBYTE           pbyKey,
    BYTE            byKeyDecMode
    )
{
    PSDevice    pDevice = (PSDevice) pDeviceHandler;        
    int         i,j;
    UINT        ii;
    PSKeyItem   pKey;
    UINT        uKeyIdx;

    DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"Enter KeybSetKey: %lX\n", dwKeyIndex);
    
    j = (MAX_KEY_TABLE-1);
    for (i=0;i<(MAX_KEY_TABLE-1);i++) {
        if ((pTable->KeyTable[i].bInUse == FALSE) &&
            (j == (MAX_KEY_TABLE-1))) {
            // found empty table
            j = i;
        }
        if ((pTable->KeyTable[i].bInUse == TRUE) &&
            IS_ETH_ADDRESS_EQUAL(pTable->KeyTable[i].abyBSSID,pbyBSSID)) {
            // found table already exist
            if ((dwKeyIndex & PAIRWISE_KEY) != 0) {
                // Pairwise key
                pKey = &(pTable->KeyTable[i].PairwiseKey);
                pTable->KeyTable[i].wKeyCtl &= 0xFFF0;          // clear pairwise key control filed
                pTable->KeyTable[i].wKeyCtl |= byKeyDecMode;
                uKeyIdx = 4;                                    // use HW key entry 4 for pairwise key
            } else {
                // Group key
                if ((dwKeyIndex & 0x000000FF) >= MAX_GROUP_KEY)
                    return (FALSE);
                pKey = &(pTable->KeyTable[i].GroupKey[dwKeyIndex & 0x000000FF]);
                if ((dwKeyIndex & TRANSMIT_KEY) != 0)  {
                    // Group transmit key
                    pTable->KeyTable[i].dwGTKeyIndex = dwKeyIndex;
                    DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"Group transmit key(R)[%lX]: %d\n", pTable->KeyTable[i].dwGTKeyIndex, i);
                }
                pTable->KeyTable[i].wKeyCtl &= 0xFF0F;          // clear group key control filed
                pTable->KeyTable[i].wKeyCtl |= (byKeyDecMode << 4);
                pTable->KeyTable[i].wKeyCtl |= 0x0040;          // use group key for group address
                uKeyIdx = (dwKeyIndex & 0x000000FF);
            }
            pTable->KeyTable[i].wKeyCtl |= 0x8000;              // enable on-fly

            pKey->bKeyValid = TRUE;
            pKey->uKeyLength = uKeyLength;
            pKey->dwKeyIndex = dwKeyIndex;
            pKey->byCipherSuite = byKeyDecMode;
            MEMvCopy(pKey->abyKey, pbyKey, uKeyLength);
            if (byKeyDecMode == KEY_CTL_WEP) {
                if (uKeyLength == WLAN_WEP40_KEYLEN)
                    pKey->abyKey[15] &= 0x7F;
                if (uKeyLength == WLAN_WEP104_KEYLEN)
                    pKey->abyKey[15] |= 0x80;
            }
            MACvSetKeyEntry(pDevice, pTable->KeyTable[i].wKeyCtl, i, uKeyIdx, pbyBSSID, (PDWORD)pKey->abyKey);

            if ((dwKeyIndex & USE_KEYRSC) == 0) {
                // RSC set by NIC
                ZERO_MEMORY(&(pKey->KeyRSC), sizeof(QWORD));
            }
            else {
                MEMvCopy(&(pKey->KeyRSC), pKeyRSC,  sizeof(QWORD));
            }
            pKey->dwTSC47_16 = 0;
            pKey->wTSC15_0 = 0;

            DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"KeybSetKey(R): \n");
            DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"pKey->bKeyValid: %d\n ", pKey->bKeyValid);
            //DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"pKey->uKeyLength: %d\n ", pKey->uKeyLength);
            DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"pKey->abyKey: ");
            for (ii = 0; ii < pKey->uKeyLength; ii++) {
                DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO "%02x ", pKey->abyKey[ii]);
            }
            DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"\n");

            DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"pKey->dwTSC47_16: %lx\n ", pKey->dwTSC47_16);
            DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"pKey->wTSC15_0: %x\n ", pKey->wTSC15_0);
            DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"pKey->dwKeyIndex: %lx\n ", pKey->dwKeyIndex);

            return (TRUE);
        }
    }
    if (j < (MAX_KEY_TABLE-1)) {
        MEMvCopy(pTable->KeyTable[j].abyBSSID,pbyBSSID,U_ETHER_ADDR_LEN);
        pTable->KeyTable[j].bInUse = TRUE;
        if ((dwKeyIndex & PAIRWISE_KEY) != 0)  {
            // Pairwise key
            pKey = &(pTable->KeyTable[j].PairwiseKey);
            pTable->KeyTable[j].wKeyCtl &= 0xFFF0;          // clear pairwise key control filed
            pTable->KeyTable[j].wKeyCtl |= byKeyDecMode;
            uKeyIdx = 4;                                    // use HW key entry 4 for pairwise key
        } else {
            // Group key
            if ((dwKeyIndex & 0x000000FF) >= MAX_GROUP_KEY)
                return (FALSE);
            pKey = &(pTable->KeyTable[j].GroupKey[dwKeyIndex & 0x000000FF]);
            if ((dwKeyIndex & TRANSMIT_KEY) != 0)  {
                // Group transmit key
                pTable->KeyTable[j].dwGTKeyIndex = dwKeyIndex;
                DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"Group transmit key(N)[%lX]: %d\n", pTable->KeyTable[j].dwGTKeyIndex, j);
            }
            pTable->KeyTable[j].wKeyCtl &= 0xFF0F;          // clear group key control filed
            pTable->KeyTable[j].wKeyCtl |= (byKeyDecMode << 4);
            pTable->KeyTable[j].wKeyCtl |= 0x0040;          // use group key for group address
            uKeyIdx = (dwKeyIndex & 0x000000FF);
        }
        pTable->KeyTable[j].wKeyCtl |= 0x8000;              // enable on-fly

        pKey->bKeyValid = TRUE;
        pKey->uKeyLength = uKeyLength;
        pKey->dwKeyIndex = dwKeyIndex;
        pKey->byCipherSuite = byKeyDecMode;
        MEMvCopy(pKey->abyKey, pbyKey, uKeyLength);
        if (byKeyDecMode == KEY_CTL_WEP) {
            if (uKeyLength == WLAN_WEP40_KEYLEN)
                pKey->abyKey[15] &= 0x7F;
            if (uKeyLength == WLAN_WEP104_KEYLEN)
                pKey->abyKey[15] |= 0x80;
        }
        MACvSetKeyEntry(pDevice, pTable->KeyTable[j].wKeyCtl, j, uKeyIdx, pbyBSSID, (PDWORD)pKey->abyKey);

        if ((dwKeyIndex & USE_KEYRSC) == 0) {
            // RSC set by NIC
            ZERO_MEMORY(&(pKey->KeyRSC), sizeof(QWORD));
        }
        else {
            MEMvCopy(&(pKey->KeyRSC), pKeyRSC,  sizeof(QWORD));
        }
        pKey->dwTSC47_16 = 0;
        pKey->wTSC15_0 = 0;
        
        DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"KeybSetKey(N): \n");
        DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"pKey->bKeyValid: %d\n ", pKey->bKeyValid);
        DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"pKey->uKeyLength: %d\n ", (int)pKey->uKeyLength);
        DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"pKey->abyKey: ");
        for (ii = 0; ii < pKey->uKeyLength; ii++) {
            DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO "%02x ", pKey->abyKey[ii]);
        }
        DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"\n");

        DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"pKey->dwTSC47_16: %lx\n ", pKey->dwTSC47_16);
        DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"pKey->wTSC15_0: %x\n ", pKey->wTSC15_0);
        DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"pKey->dwKeyIndex: %lx\n ", pKey->dwKeyIndex);

        return (TRUE);
    }
    return (FALSE);
}


/*
 * Description: Remove Key from table
 *
 * Parameters:
 *  In:
 *      pTable          - Pointer to Key table
 *      pbyBSSID        - BSSID of Key
 *      dwKeyIndex      - Key Index (reference to NDIS DDK)
 *  Out:
 *      none
 *
 * Return Value: TRUE if success otherwise FALSE
 *
 */
BOOL KeybRemoveKey (
    PVOID           pDeviceHandler,
    PSKeyManagement pTable,
    PBYTE           pbyBSSID,
    DWORD           dwKeyIndex
    )
{
    PSDevice    pDevice = (PSDevice) pDeviceHandler;        
    int     i;
    BOOL    bReturnValue = FALSE;

    if (IS_BROADCAST_ADDRESS(pbyBSSID)) {
        // dealte all key
        if ((dwKeyIndex & PAIRWISE_KEY) != 0) {
            for (i=0;i<MAX_KEY_TABLE;i++) {
                pTable->KeyTable[i].PairwiseKey.bKeyValid = FALSE;
            }
            bReturnValue =  TRUE;
        }
        else if ((dwKeyIndex & 0x000000FF) < MAX_GROUP_KEY) {
            for (i=0;i<MAX_KEY_TABLE;i++) {
                pTable->KeyTable[i].GroupKey[dwKeyIndex & 0x000000FF].bKeyValid = FALSE;
                if ((dwKeyIndex & 0x7FFFFFFF) == (pTable->KeyTable[i].dwGTKeyIndex & 0x7FFFFFFF)) {
                    // remove Group transmit key
                    pTable->KeyTable[i].dwGTKeyIndex = 0;
                }
            }
            bReturnValue = TRUE;
        }
        else {
            bReturnValue = FALSE;
        }