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gnab-rtl8812au/core/rtw_wapi_sms4.c

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2013-11-19 20:24:49 +00:00
#ifdef CONFIG_WAPI_SUPPORT
#include <linux/unistd.h>
#include <linux/etherdevice.h>
#include <drv_types.h>
#include <rtw_wapi.h>
#ifdef CONFIG_WAPI_SW_SMS4
#define WAPI_LITTLE_ENDIAN
//#define BIG_ENDIAN
#define ENCRYPT 0
#define DECRYPT 1
/**********************************************************
**********************************************************/
const u8 Sbox[256] = {
0xd6,0x90,0xe9,0xfe,0xcc,0xe1,0x3d,0xb7,0x16,0xb6,0x14,0xc2,0x28,0xfb,0x2c,0x05,
0x2b,0x67,0x9a,0x76,0x2a,0xbe,0x04,0xc3,0xaa,0x44,0x13,0x26,0x49,0x86,0x06,0x99,
0x9c,0x42,0x50,0xf4,0x91,0xef,0x98,0x7a,0x33,0x54,0x0b,0x43,0xed,0xcf,0xac,0x62,
0xe4,0xb3,0x1c,0xa9,0xc9,0x08,0xe8,0x95,0x80,0xdf,0x94,0xfa,0x75,0x8f,0x3f,0xa6,
0x47,0x07,0xa7,0xfc,0xf3,0x73,0x17,0xba,0x83,0x59,0x3c,0x19,0xe6,0x85,0x4f,0xa8,
0x68,0x6b,0x81,0xb2,0x71,0x64,0xda,0x8b,0xf8,0xeb,0x0f,0x4b,0x70,0x56,0x9d,0x35,
0x1e,0x24,0x0e,0x5e,0x63,0x58,0xd1,0xa2,0x25,0x22,0x7c,0x3b,0x01,0x21,0x78,0x87,
0xd4,0x00,0x46,0x57,0x9f,0xd3,0x27,0x52,0x4c,0x36,0x02,0xe7,0xa0,0xc4,0xc8,0x9e,
0xea,0xbf,0x8a,0xd2,0x40,0xc7,0x38,0xb5,0xa3,0xf7,0xf2,0xce,0xf9,0x61,0x15,0xa1,
0xe0,0xae,0x5d,0xa4,0x9b,0x34,0x1a,0x55,0xad,0x93,0x32,0x30,0xf5,0x8c,0xb1,0xe3,
0x1d,0xf6,0xe2,0x2e,0x82,0x66,0xca,0x60,0xc0,0x29,0x23,0xab,0x0d,0x53,0x4e,0x6f,
0xd5,0xdb,0x37,0x45,0xde,0xfd,0x8e,0x2f,0x03,0xff,0x6a,0x72,0x6d,0x6c,0x5b,0x51,
0x8d,0x1b,0xaf,0x92,0xbb,0xdd,0xbc,0x7f,0x11,0xd9,0x5c,0x41,0x1f,0x10,0x5a,0xd8,
0x0a,0xc1,0x31,0x88,0xa5,0xcd,0x7b,0xbd,0x2d,0x74,0xd0,0x12,0xb8,0xe5,0xb4,0xb0,
0x89,0x69,0x97,0x4a,0x0c,0x96,0x77,0x7e,0x65,0xb9,0xf1,0x09,0xc5,0x6e,0xc6,0x84,
0x18,0xf0,0x7d,0xec,0x3a,0xdc,0x4d,0x20,0x79,0xee,0x5f,0x3e,0xd7,0xcb,0x39,0x48
};
const u32 CK[32] = {
0x00070e15, 0x1c232a31, 0x383f464d, 0x545b6269,
0x70777e85, 0x8c939aa1, 0xa8afb6bd, 0xc4cbd2d9,
0xe0e7eef5, 0xfc030a11, 0x181f262d, 0x343b4249,
0x50575e65, 0x6c737a81, 0x888f969d, 0xa4abb2b9,
0xc0c7ced5, 0xdce3eaf1, 0xf8ff060d, 0x141b2229,
0x30373e45, 0x4c535a61, 0x686f767d, 0x848b9299,
0xa0a7aeb5, 0xbcc3cad1, 0xd8dfe6ed, 0xf4fb0209,
0x10171e25, 0x2c333a41, 0x484f565d, 0x646b7279 };
#define Rotl(_x, _y) (((_x) << (_y)) | ((_x) >> (32 - (_y))))
#define ByteSub(_A) (Sbox[(_A) >> 24 & 0xFF] << 24 | \
Sbox[(_A) >> 16 & 0xFF] << 16 | \
Sbox[(_A) >> 8 & 0xFF] << 8 | \
Sbox[(_A) & 0xFF])
#define L1(_B) ((_B) ^ Rotl(_B, 2) ^ Rotl(_B, 10) ^ Rotl(_B, 18) ^ Rotl(_B, 24))
#define L2(_B) ((_B) ^ Rotl(_B, 13) ^ Rotl(_B, 23))
static void
xor_block(void *dst, void *src1, void *src2)
/* 128-bit xor: *dst = *src1 xor *src2. Pointers must be 32-bit aligned */
{
((u32 *)dst)[0] = ((u32 *)src1)[0] ^ ((u32 *)src2)[0];
((u32 *)dst)[1] = ((u32 *)src1)[1] ^ ((u32 *)src2)[1];
((u32 *)dst)[2] = ((u32 *)src1)[2] ^ ((u32 *)src2)[2];
((u32 *)dst)[3] = ((u32 *)src1)[3] ^ ((u32 *)src2)[3];
}
void SMS4Crypt(u8 *Input, u8 *Output, u32 *rk)
{
u32 r, mid, x0, x1, x2, x3, *p;
p = (u32 *)Input;
x0 = p[0];
x1 = p[1];
x2 = p[2];
x3 = p[3];
#ifdef WAPI_LITTLE_ENDIAN
x0 = Rotl(x0, 16); x0 = ((x0 & 0x00FF00FF) << 8) | ((x0 & 0xFF00FF00) >> 8);
x1 = Rotl(x1, 16); x1 = ((x1 & 0x00FF00FF) << 8) | ((x1 & 0xFF00FF00) >> 8);
x2 = Rotl(x2, 16); x2 = ((x2 & 0x00FF00FF) << 8) | ((x2 & 0xFF00FF00) >> 8);
x3 = Rotl(x3, 16); x3 = ((x3 & 0x00FF00FF) << 8) | ((x3 & 0xFF00FF00) >> 8);
#endif
for (r = 0; r < 32; r += 4)
{
mid = x1 ^ x2 ^ x3 ^ rk[r + 0];
mid = ByteSub(mid);
x0 ^= L1(mid);
mid = x2 ^ x3 ^ x0 ^ rk[r + 1];
mid = ByteSub(mid);
x1 ^= L1(mid);
mid = x3 ^ x0 ^ x1 ^ rk[r + 2];
mid = ByteSub(mid);
x2 ^= L1(mid);
mid = x0 ^ x1 ^ x2 ^ rk[r + 3];
mid = ByteSub(mid);
x3 ^= L1(mid);
}
#ifdef WAPI_LITTLE_ENDIAN
x0 = Rotl(x0, 16); x0 = ((x0 & 0x00FF00FF) << 8) | ((x0 & 0xFF00FF00) >> 8);
x1 = Rotl(x1, 16); x1 = ((x1 & 0x00FF00FF) << 8) | ((x1 & 0xFF00FF00) >> 8);
x2 = Rotl(x2, 16); x2 = ((x2 & 0x00FF00FF) << 8) | ((x2 & 0xFF00FF00) >> 8);
x3 = Rotl(x3, 16); x3 = ((x3 & 0x00FF00FF) << 8) | ((x3 & 0xFF00FF00) >> 8);
#endif
p = (u32 *)Output;
p[0] = x3;
p[1] = x2;
p[2] = x1;
p[3] = x0;
}
void SMS4KeyExt(u8 *Key, u32 *rk, u32 CryptFlag)
{
u32 r, mid, x0, x1, x2, x3, *p;
p = (u32 *)Key;
x0 = p[0];
x1 = p[1];
x2 = p[2];
x3 = p[3];
#ifdef WAPI_LITTLE_ENDIAN
x0 = Rotl(x0, 16); x0 = ((x0 & 0xFF00FF) << 8) | ((x0 & 0xFF00FF00) >> 8);
x1 = Rotl(x1, 16); x1 = ((x1 & 0xFF00FF) << 8) | ((x1 & 0xFF00FF00) >> 8);
x2 = Rotl(x2, 16); x2 = ((x2 & 0xFF00FF) << 8) | ((x2 & 0xFF00FF00) >> 8);
x3 = Rotl(x3, 16); x3 = ((x3 & 0xFF00FF) << 8) | ((x3 & 0xFF00FF00) >> 8);
#endif
x0 ^= 0xa3b1bac6;
x1 ^= 0x56aa3350;
x2 ^= 0x677d9197;
x3 ^= 0xb27022dc;
for (r = 0; r < 32; r += 4)
{
mid = x1 ^ x2 ^ x3 ^ CK[r + 0];
mid = ByteSub(mid);
rk[r + 0] = x0 ^= L2(mid);
mid = x2 ^ x3 ^ x0 ^ CK[r + 1];
mid = ByteSub(mid);
rk[r + 1] = x1 ^= L2(mid);
mid = x3 ^ x0 ^ x1 ^ CK[r + 2];
mid = ByteSub(mid);
rk[r + 2] = x2 ^= L2(mid);
mid = x0 ^ x1 ^ x2 ^ CK[r + 3];
mid = ByteSub(mid);
rk[r + 3] = x3 ^= L2(mid);
}
if (CryptFlag == DECRYPT)
{
for (r = 0; r < 16; r++)
mid = rk[r], rk[r] = rk[31 - r], rk[31 - r] = mid;
}
}
void WapiSMS4Cryption(u8 *Key, u8 *IV, u8 *Input, u16 InputLength,
u8 *Output, u16 *OutputLength, u32 CryptFlag)
{
u32 blockNum,i,j, rk[32];
u16 remainder;
u8 blockIn[16],blockOut[16], tempIV[16], k;
*OutputLength = 0;
remainder = InputLength & 0x0F;
blockNum = InputLength >> 4;
if(remainder !=0)
blockNum++;
else
remainder = 16;
for(k=0;k<16;k++)
tempIV[k] = IV[15-k];
memcpy(blockIn, tempIV, 16);
SMS4KeyExt((u8 *)Key, rk,CryptFlag);
for(i=0; i<blockNum-1; i++)
{
SMS4Crypt((u8 *)blockIn, blockOut, rk);
xor_block(&Output[i*16], &Input[i*16], blockOut);
memcpy(blockIn,blockOut,16);
}
*OutputLength = i*16;
SMS4Crypt((u8 *)blockIn, blockOut, rk);
for(j=0; j<remainder; j++)
{
Output[i*16+j] = Input[i*16+j] ^ blockOut[j];
}
*OutputLength += remainder;
}
void WapiSMS4Encryption(u8 *Key, u8 *IV, u8 *Input, u16 InputLength,
u8 *Output, u16 *OutputLength)
{
WapiSMS4Cryption(Key, IV, Input, InputLength, Output, OutputLength, ENCRYPT);
}
void WapiSMS4Decryption(u8 *Key, u8 *IV, u8 *Input, u16 InputLength,
u8 *Output, u16 *OutputLength)
{
// OFB mode: is also ENCRYPT flag
WapiSMS4Cryption(Key, IV, Input, InputLength, Output, OutputLength, ENCRYPT);
}
void WapiSMS4CalculateMic(u8 *Key, u8 *IV, u8 *Input1, u8 Input1Length,
u8 *Input2, u16 Input2Length, u8 *Output, u8 *OutputLength)
{
u32 blockNum, i, remainder, rk[32];
u8 BlockIn[16], BlockOut[16], TempBlock[16], tempIV[16], k;
*OutputLength = 0;
remainder = Input1Length & 0x0F;
blockNum = Input1Length >> 4;
for(k=0;k<16;k++)
tempIV[k] = IV[15-k];
memcpy(BlockIn, tempIV, 16);
SMS4KeyExt((u8 *)Key, rk, ENCRYPT);
SMS4Crypt((u8 *)BlockIn, BlockOut, rk);
for(i=0; i<blockNum; i++){
xor_block(BlockIn, (Input1+i*16), BlockOut);
SMS4Crypt((u8 *)BlockIn, BlockOut, rk);
}
if(remainder !=0){
memset(TempBlock, 0, 16);
memcpy(TempBlock, (Input1+blockNum*16), remainder);
xor_block(BlockIn, TempBlock, BlockOut);
SMS4Crypt((u8 *)BlockIn, BlockOut, rk);
}
remainder = Input2Length & 0x0F;
blockNum = Input2Length >> 4;
for(i=0; i<blockNum; i++){
xor_block(BlockIn, (Input2+i*16), BlockOut);
SMS4Crypt((u8 *)BlockIn, BlockOut, rk);
}
if(remainder !=0){
memset(TempBlock, 0, 16);
memcpy(TempBlock, (Input2+blockNum*16), remainder);
xor_block(BlockIn, TempBlock, BlockOut);
SMS4Crypt((u8 *)BlockIn, BlockOut, rk);
}
memcpy(Output, BlockOut, 16);
*OutputLength = 16;
}
void SecCalculateMicSMS4(
u8 KeyIdx,
u8 *MicKey,
u8 *pHeader,
u8 *pData,
u16 DataLen,
u8 *MicBuffer
)
{
#if 0
struct ieee80211_hdr_3addr_qos *header;
u8 TempBuf[34], TempLen = 32, MicLen, QosOffset, *IV;
u16 *pTemp, fc;
WAPI_TRACE(WAPI_TX|WAPI_RX, "=========>%s\n", __FUNCTION__);
header = (struct ieee80211_hdr_3addr_qos *)pHeader;
memset(TempBuf, 0, 34);
memcpy(TempBuf, pHeader, 2); //FrameCtrl
pTemp = (u16*)TempBuf;
*pTemp &= 0xc78f; //bit4,5,6,11,12,13
memcpy((TempBuf+2), (pHeader+4), 12); //Addr1, Addr2
memcpy((TempBuf+14), (pHeader+22), 2); // SeqCtrl
pTemp = (u16*)(TempBuf + 14);
*pTemp &= 0x000f;
memcpy((TempBuf+16), (pHeader+16), 6); //Addr3
fc = le16_to_cpu(header->frame_ctl);
if (GetFrDs((u16*)&fc) && GetToDs((u16 *)&fc))
{
memcpy((TempBuf+22), (pHeader+24), 6);
QosOffset = 30;
}else{
memset((TempBuf+22), 0, 6);
QosOffset = 24;
}
if((fc & 0x0088) == 0x0088){
memcpy((TempBuf+28), (pHeader+QosOffset), 2);
TempLen += 2;
//IV = pHeader + QosOffset + 2 + SNAP_SIZE + sizeof(u16) + 2;
IV = pHeader + QosOffset + 2 + 2;
}else{
IV = pHeader + QosOffset + 2;
//IV = pHeader + QosOffset + SNAP_SIZE + sizeof(u16) + 2;
}
TempBuf[TempLen-1] = (u8)(DataLen & 0xff);
TempBuf[TempLen-2] = (u8)((DataLen & 0xff00)>>8);
TempBuf[TempLen-4] = KeyIdx;
WAPI_DATA(WAPI_TX, "CalculateMic - KEY", MicKey, 16);
WAPI_DATA(WAPI_TX, "CalculateMic - IV", IV, 16);
WAPI_DATA(WAPI_TX, "CalculateMic - TempBuf", TempBuf, TempLen);
WAPI_DATA(WAPI_TX, "CalculateMic - pData", pData, DataLen);
WapiSMS4CalculateMic(MicKey, IV, TempBuf, TempLen,
pData, DataLen, MicBuffer, &MicLen);
if (MicLen != 16)
WAPI_TRACE(WAPI_ERR,"%s: MIC Length Error!!\n",__FUNCTION__);
WAPI_TRACE(WAPI_TX|WAPI_RX, "<=========%s\n", __FUNCTION__);
#endif
}
/* AddCount: 1 or 2.
* If overflow, return 1,
* else return 0.
*/
u8 WapiIncreasePN(u8 *PN, u8 AddCount)
{
u8 i;
if (NULL == PN)
return 1;
//YJ,test,091102
/*
if(AddCount == 2){
DBG_8192C("############################%s(): PN[0]=0x%x\n", __FUNCTION__, PN[0]);
if(PN[0] == 0x48){
PN[0] += AddCount;
return 1;
}else{
PN[0] += AddCount;
return 0;
}
}
*/
//YJ,test,091102,end
for (i=0; i<16; i++)
{
if (PN[i] + AddCount <= 0xff)
{
PN[i] += AddCount;
return 0;
}
else
{
PN[i] += AddCount;
AddCount = 1;
}
}
return 1;
}
void WapiGetLastRxUnicastPNForQoSData(
u8 UserPriority,
PRT_WAPI_STA_INFO pWapiStaInfo,
u8 *PNOut
)
{
WAPI_TRACE(WAPI_RX, "===========> %s\n", __FUNCTION__);
switch(UserPriority)
{
case 0:
case 3:
memcpy(PNOut,pWapiStaInfo->lastRxUnicastPNBEQueue,16);
break;
case 1:
case 2:
memcpy(PNOut,pWapiStaInfo->lastRxUnicastPNBKQueue,16);
break;
case 4:
case 5:
memcpy(PNOut,pWapiStaInfo->lastRxUnicastPNVIQueue,16);
break;
case 6:
case 7:
memcpy(PNOut,pWapiStaInfo->lastRxUnicastPNVOQueue,16);
break;
default:
WAPI_TRACE(WAPI_ERR, "%s: Unknown TID \n", __FUNCTION__);
break;
}
WAPI_TRACE(WAPI_RX, "<=========== %s\n", __FUNCTION__);
}
void WapiSetLastRxUnicastPNForQoSData(
u8 UserPriority,
u8 *PNIn,
PRT_WAPI_STA_INFO pWapiStaInfo
)
{
WAPI_TRACE(WAPI_RX, "===========> %s\n", __FUNCTION__);
switch(UserPriority)
{
case 0:
case 3:
memcpy(pWapiStaInfo->lastRxUnicastPNBEQueue,PNIn,16);
break;
case 1:
case 2:
memcpy(pWapiStaInfo->lastRxUnicastPNBKQueue,PNIn,16);
break;
case 4:
case 5:
memcpy(pWapiStaInfo->lastRxUnicastPNVIQueue,PNIn,16);
break;
case 6:
case 7:
memcpy(pWapiStaInfo->lastRxUnicastPNVOQueue,PNIn,16);
break;
default:
WAPI_TRACE(WAPI_ERR, "%s: Unknown TID \n", __FUNCTION__);
break;
}
WAPI_TRACE(WAPI_RX, "<=========== %s\n", __FUNCTION__);
}
/****************************************************************************
FALSE not RX-Reorder
TRUE do RX Reorder
add to support WAPI to N-mode
*****************************************************************************/
u8 WapiCheckPnInSwDecrypt(
_adapter *padapter,
struct sk_buff *pskb
)
{
u8 ret = false;
#if 0
struct ieee80211_hdr_3addr_qos *header;
u16 fc;
u8 *pDaddr, *pTaddr, *pRaddr;
header = (struct ieee80211_hdr_3addr_qos *)pskb->data;
pTaddr = header->addr2;
pRaddr = header->addr1;
fc = le16_to_cpu(header->frame_ctl);
if(GetToDs(&fc))
pDaddr = header->addr3;
else
pDaddr = header->addr1;
if ((_rtw_memcmp(pRaddr, padapter->pnetdev->dev_addr, ETH_ALEN) == 0)
&& ! (pDaddr)
&& (GetFrameType(&fc) == WIFI_QOS_DATA_TYPE))
//&& ieee->pHTInfo->bCurrentHTSupport &&
//ieee->pHTInfo->bCurRxReorderEnable)
ret = false;
else
ret = true;
#endif
WAPI_TRACE(WAPI_RX, "%s: return %d\n", __FUNCTION__, ret);
return ret;
}
int SecSMS4HeaderFillIV(_adapter *padapter, u8 *pxmitframe)
{
struct pkt_attrib *pattrib = &((struct xmit_frame*)pxmitframe)->attrib;
u8 * frame = ((struct xmit_frame *)pxmitframe)->buf_addr + TXDESC_OFFSET;
u8 *pSecHeader = NULL, *pos = NULL, *pRA = NULL;
u8 bPNOverflow = false, bFindMatchPeer = false, hdr_len = 0;
PWLAN_HEADER_WAPI_EXTENSION pWapiExt = NULL;
PRT_WAPI_T pWapiInfo = &padapter->wapiInfo;
PRT_WAPI_STA_INFO pWapiSta = NULL;
int ret = 0;
WAPI_TRACE(WAPI_TX, "=========>%s\n", __FUNCTION__);
return ret;
#if 0
hdr_len = sMacHdrLng;
if (GetFrameType(pskb->data) == WIFI_QOS_DATA_TYPE)
{
hdr_len += 2;
}
//hdr_len += SNAP_SIZE + sizeof(u16);
pos = skb_push(pskb, padapter->wapiInfo.extra_prefix_len);
memmove(pos, pos+padapter->wapiInfo.extra_prefix_len, hdr_len);
pSecHeader = pskb->data + hdr_len;
pWapiExt = (PWLAN_HEADER_WAPI_EXTENSION)pSecHeader;
pRA = pskb->data + 4;
WAPI_DATA(WAPI_TX, "FillIV - Before Fill IV", pskb->data, pskb->len);
//Address 1 is always receiver's address
if( IS_MCAST(pRA) ){
if(!pWapiInfo->wapiTxMsk.bTxEnable){
WAPI_TRACE(WAPI_ERR,"%s: bTxEnable = 0!!\n",__FUNCTION__);
return -2;
}
if(pWapiInfo->wapiTxMsk.keyId <= 1){
pWapiExt->KeyIdx = pWapiInfo->wapiTxMsk.keyId;
pWapiExt->Reserved = 0;
bPNOverflow = WapiIncreasePN(pWapiInfo->lastTxMulticastPN, 1);
memcpy(pWapiExt->PN, pWapiInfo->lastTxMulticastPN, 16);
if (bPNOverflow){
// Update MSK Notification.
WAPI_TRACE(WAPI_ERR,"===============>%s():multicast PN overflow\n",__FUNCTION__);
rtw_wapi_app_event_handler(padapter,NULL,0,pRA, false, false, true, 0, false);
}
}else{
WAPI_TRACE(WAPI_ERR,"%s: Invalid Wapi Multicast KeyIdx!!\n",__FUNCTION__);
ret = -3;
}
}
else{
list_for_each_entry(pWapiSta, &pWapiInfo->wapiSTAUsedList, list) {
if(!memcmp(pWapiSta->PeerMacAddr,pRA,6)){
bFindMatchPeer = true;
break;
}
}
if (bFindMatchPeer){
if((!pWapiSta->wapiUskUpdate.bTxEnable) && (!pWapiSta->wapiUsk.bTxEnable)){
WAPI_TRACE(WAPI_ERR,"%s: bTxEnable = 0!!\n",__FUNCTION__);
return -4;
}
if (pWapiSta->wapiUsk.keyId <= 1){
if(pWapiSta->wapiUskUpdate.bTxEnable)
pWapiExt->KeyIdx = pWapiSta->wapiUskUpdate.keyId;
else
pWapiExt->KeyIdx = pWapiSta->wapiUsk.keyId;
pWapiExt->Reserved = 0;
bPNOverflow = WapiIncreasePN(pWapiSta->lastTxUnicastPN, 2);
memcpy(pWapiExt->PN, pWapiSta->lastTxUnicastPN, 16);
if (bPNOverflow){
// Update USK Notification.
WAPI_TRACE(WAPI_ERR,"===============>%s():unicast PN overflow\n",__FUNCTION__);
rtw_wapi_app_event_handler(padapter,NULL,0,pWapiSta->PeerMacAddr, false, true, false, 0, false);
}
}else{
WAPI_TRACE(WAPI_ERR,"%s: Invalid Wapi Unicast KeyIdx!!\n",__FUNCTION__);
ret = -5;
}
}
else{
WAPI_TRACE(WAPI_ERR,"%s: Can not find Peer Sta "MAC_FMT"!!\n",__FUNCTION__, MAC_ARG(pRA));
ret = -6;
}
}
WAPI_DATA(WAPI_TX, "FillIV - After Fill IV", pskb->data, pskb->len);
WAPI_TRACE(WAPI_TX, "<=========%s\n", __FUNCTION__);
return ret;
#endif
}
// WAPI SW Enc: must have done Coalesce!
void SecSWSMS4Encryption(
_adapter *padapter,
u8 * pxmitframe
)
{
PRT_WAPI_T pWapiInfo = &padapter->wapiInfo;
PRT_WAPI_STA_INFO pWapiSta = NULL;
u8 *pframe = ((struct xmit_frame*)pxmitframe)->buf_addr + TXDESC_SIZE;
struct pkt_attrib *pattrib = &((struct xmit_frame*)pxmitframe)->attrib;
u8 *SecPtr = NULL, *pRA, *pMicKey = NULL, *pDataKey = NULL, *pIV = NULL;
u8 IVOffset, DataOffset, bFindMatchPeer = false, KeyIdx = 0, MicBuffer[16];
u16 OutputLength;
WAPI_TRACE(WAPI_TX, "=========>%s\n", __FUNCTION__);
WAPI_TRACE(WAPI_TX,"hdrlen: %d \n",pattrib->hdrlen);
return;
DataOffset = pattrib->hdrlen + pattrib->iv_len;
pRA = pframe + 4;
if( IS_MCAST(pRA) ){
KeyIdx = pWapiInfo->wapiTxMsk.keyId;
pIV = pWapiInfo->lastTxMulticastPN;
pMicKey = pWapiInfo->wapiTxMsk.micKey;
pDataKey = pWapiInfo->wapiTxMsk.dataKey;
}else{
if (!list_empty(&(pWapiInfo->wapiSTAUsedList))){
list_for_each_entry(pWapiSta, &pWapiInfo->wapiSTAUsedList, list) {
if (0 == memcmp(pWapiSta->PeerMacAddr, pRA, 6)){
bFindMatchPeer = true;
break;
}
}
if (bFindMatchPeer){
if (pWapiSta->wapiUskUpdate.bTxEnable){
KeyIdx = pWapiSta->wapiUskUpdate.keyId;
WAPI_TRACE(WAPI_TX, "%s(): Use update USK!! KeyIdx=%d\n", __FUNCTION__, KeyIdx);
pIV = pWapiSta->lastTxUnicastPN;
pMicKey = pWapiSta->wapiUskUpdate.micKey;
pDataKey = pWapiSta->wapiUskUpdate.dataKey;
}else{
KeyIdx = pWapiSta->wapiUsk.keyId;
WAPI_TRACE(WAPI_TX, "%s(): Use USK!! KeyIdx=%d\n", __FUNCTION__, KeyIdx);
pIV = pWapiSta->lastTxUnicastPN;
pMicKey = pWapiSta->wapiUsk.micKey;
pDataKey = pWapiSta->wapiUsk.dataKey;
}
}else{
WAPI_TRACE(WAPI_ERR,"%s: Can not find Peer Sta!!\n",__FUNCTION__);
return;
}
}else{
WAPI_TRACE(WAPI_ERR,"%s: wapiSTAUsedList is empty!!\n",__FUNCTION__);
return;
}
}
SecPtr = pframe;
SecCalculateMicSMS4(KeyIdx, pMicKey, SecPtr, (SecPtr+DataOffset), pattrib->pktlen, MicBuffer);
WAPI_DATA(WAPI_TX, "Encryption - MIC", MicBuffer, padapter->wapiInfo.extra_postfix_len);
memcpy(pframe+pattrib->hdrlen+pattrib->iv_len+pattrib->pktlen-pattrib->icv_len,
(u8 *)MicBuffer,
padapter->wapiInfo.extra_postfix_len
);
WapiSMS4Encryption(pDataKey, pIV, (SecPtr+DataOffset),pattrib->pktlen+pattrib->icv_len, (SecPtr+DataOffset), &OutputLength);
WAPI_DATA(WAPI_TX, "Encryption - After SMS4 encryption",pframe,pattrib->hdrlen+pattrib->iv_len+pattrib->pktlen);
WAPI_TRACE(WAPI_TX, "<=========%s\n", __FUNCTION__);
}
u8 SecSWSMS4Decryption(
_adapter *padapter,
u8 *precv_frame,
struct recv_priv *precv_priv
)
{
PRT_WAPI_T pWapiInfo = &padapter->wapiInfo;
struct recv_frame_hdr *precv_hdr;
PRT_WAPI_STA_INFO pWapiSta = NULL;
u8 IVOffset, DataOffset, bFindMatchPeer = false, bUseUpdatedKey = false;
u8 KeyIdx, MicBuffer[16], lastRxPNforQoS[16];
u8 *pRA, *pTA, *pMicKey, *pDataKey, *pLastRxPN, *pRecvPN, *pSecData, *pRecvMic, *pos;
u8 TID = 0;
u16 OutputLength, DataLen;
u8 bQosData;
struct sk_buff * pskb;
WAPI_TRACE(WAPI_RX, "=========>%s\n", __FUNCTION__);
return 0;
precv_hdr = &((union recv_frame*)precv_frame)->u.hdr;
pskb = (struct sk_buff *)(precv_hdr->rx_data);
precv_hdr->bWapiCheckPNInDecrypt = WapiCheckPnInSwDecrypt(padapter, pskb);
WAPI_TRACE(WAPI_RX, "=========>%s: check PN %d\n", __FUNCTION__,precv_hdr->bWapiCheckPNInDecrypt);
WAPI_DATA(WAPI_RX, "Decryption - Before decryption", pskb->data, pskb->len);
IVOffset = sMacHdrLng;
bQosData = GetFrameType(pskb->data) == WIFI_QOS_DATA_TYPE;
if (bQosData){
IVOffset += 2;
}
//if(GetHTC())
// IVOffset += 4;
//IVOffset += SNAP_SIZE + sizeof(u16);
DataOffset = IVOffset + padapter->wapiInfo.extra_prefix_len;
pRA = pskb->data + 4;
pTA = pskb->data + 10;
KeyIdx = *(pskb->data + IVOffset);
pRecvPN = pskb->data + IVOffset + 2;
pSecData = pskb->data + DataOffset;
DataLen = pskb->len - DataOffset;
pRecvMic = pskb->data + pskb->len - padapter->wapiInfo.extra_postfix_len;
TID = GetTid(pskb->data);
if (!list_empty(&(pWapiInfo->wapiSTAUsedList))){
list_for_each_entry(pWapiSta, &pWapiInfo->wapiSTAUsedList, list) {
if (0 == memcmp(pWapiSta->PeerMacAddr, pTA, 6)){
bFindMatchPeer = true;
break;
}
}
}
if (!bFindMatchPeer){
WAPI_TRACE(WAPI_ERR, "%s: Can not find Peer Sta "MAC_FMT" for Key Info!!!\n", __FUNCTION__, MAC_ARG(pTA));
return false;
}
if( IS_MCAST(pRA) ){
WAPI_TRACE(WAPI_RX, "%s: Multicast decryption !!!\n", __FUNCTION__);
if (pWapiSta->wapiMsk.keyId == KeyIdx && pWapiSta->wapiMsk.bSet){
pLastRxPN = pWapiSta->lastRxMulticastPN;
if (!WapiComparePN(pRecvPN, pLastRxPN)){
WAPI_TRACE(WAPI_ERR, "%s: MSK PN is not larger than last, Dropped!!!\n", __FUNCTION__);
WAPI_DATA(WAPI_ERR, "pRecvPN:", pRecvPN, 16);
WAPI_DATA(WAPI_ERR, "pLastRxPN:", pLastRxPN, 16);
return false;
}
memcpy(pLastRxPN, pRecvPN, 16);
pMicKey = pWapiSta->wapiMsk.micKey;
pDataKey = pWapiSta->wapiMsk.dataKey;
}else if (pWapiSta->wapiMskUpdate.keyId == KeyIdx && pWapiSta->wapiMskUpdate.bSet){
WAPI_TRACE(WAPI_RX, "%s: Use Updated MSK for Decryption !!!\n", __FUNCTION__);
bUseUpdatedKey = true;
memcpy(pWapiSta->lastRxMulticastPN, pRecvPN, 16);
pMicKey = pWapiSta->wapiMskUpdate.micKey;
pDataKey = pWapiSta->wapiMskUpdate.dataKey;
}else{
WAPI_TRACE(WAPI_ERR, "%s: Can not find MSK with matched KeyIdx(%d), Dropped !!!\n", __FUNCTION__,KeyIdx);
return false;
}
}
else{
WAPI_TRACE(WAPI_RX, "%s: Unicast decryption !!!\n", __FUNCTION__);
if (pWapiSta->wapiUsk.keyId == KeyIdx && pWapiSta->wapiUsk.bSet){
WAPI_TRACE(WAPI_RX, "%s: Use USK for Decryption!!!\n", __FUNCTION__);
if(precv_hdr->bWapiCheckPNInDecrypt){
if(GetFrameType(pskb->data) == WIFI_QOS_DATA_TYPE){
WapiGetLastRxUnicastPNForQoSData(TID, pWapiSta, lastRxPNforQoS);
pLastRxPN = lastRxPNforQoS;
}else{
pLastRxPN = pWapiSta->lastRxUnicastPN;
}
if (!WapiComparePN(pRecvPN, pLastRxPN)){
return false;
}
if(bQosData){
WapiSetLastRxUnicastPNForQoSData(TID, pRecvPN, pWapiSta);
}else{
memcpy(pWapiSta->lastRxUnicastPN, pRecvPN, 16);
}
}else{
memcpy(precv_hdr->WapiTempPN,pRecvPN,16);
}
if (check_fwstate(&padapter->mlmepriv, WIFI_STATION_STATE))
{
if ((pRecvPN[0] & 0x1) == 0){
WAPI_TRACE(WAPI_ERR, "%s: Rx USK PN is not odd when Infra STA mode, Dropped !!!\n", __FUNCTION__);
return false;
}
}
pMicKey = pWapiSta->wapiUsk.micKey;
pDataKey = pWapiSta->wapiUsk.dataKey;
}
else if (pWapiSta->wapiUskUpdate.keyId == KeyIdx && pWapiSta->wapiUskUpdate.bSet ){
WAPI_TRACE(WAPI_RX, "%s: Use Updated USK for Decryption!!!\n", __FUNCTION__);
if(pWapiSta->bAuthenticatorInUpdata)
bUseUpdatedKey = true;
else
bUseUpdatedKey = false;
if(bQosData){
WapiSetLastRxUnicastPNForQoSData(TID, pRecvPN, pWapiSta);
}else{
memcpy(pWapiSta->lastRxUnicastPN, pRecvPN, 16);
}
pMicKey = pWapiSta->wapiUskUpdate.micKey;
pDataKey = pWapiSta->wapiUskUpdate.dataKey;
}else{
WAPI_TRACE(WAPI_ERR, "%s: No valid USK!!!KeyIdx=%d pWapiSta->wapiUsk.keyId=%d pWapiSta->wapiUskUpdate.keyId=%d\n", __FUNCTION__, KeyIdx, pWapiSta->wapiUsk.keyId, pWapiSta->wapiUskUpdate.keyId);
//dump_buf(pskb->data,pskb->len);
return false;
}
}
WAPI_DATA(WAPI_RX, "Decryption - DataKey", pDataKey, 16);
WAPI_DATA(WAPI_RX, "Decryption - IV", pRecvPN, 16);
WapiSMS4Decryption(pDataKey, pRecvPN, pSecData, DataLen, pSecData, &OutputLength);
if (OutputLength != DataLen)
WAPI_TRACE(WAPI_ERR, "%s: Output Length Error!!!!\n", __FUNCTION__);
WAPI_DATA(WAPI_RX, "Decryption - After decryption", pskb->data, pskb->len);
DataLen -= padapter->wapiInfo.extra_postfix_len;
SecCalculateMicSMS4(KeyIdx, pMicKey, pskb->data, pSecData, DataLen, MicBuffer);
WAPI_DATA(WAPI_RX, "Decryption - MIC received", pRecvMic, SMS4_MIC_LEN);
WAPI_DATA(WAPI_RX, "Decryption - MIC calculated", MicBuffer, SMS4_MIC_LEN);
if (0 == memcmp(MicBuffer, pRecvMic, padapter->wapiInfo.extra_postfix_len)){
WAPI_TRACE(WAPI_RX, "%s: Check MIC OK!!\n", __FUNCTION__);
if (bUseUpdatedKey){
// delete the old key
if ( IS_MCAST(pRA) ){
WAPI_TRACE(WAPI_API, "%s(): AE use new update MSK!!\n", __FUNCTION__);
pWapiSta->wapiMsk.keyId = pWapiSta->wapiMskUpdate.keyId;
memcpy(pWapiSta->wapiMsk.dataKey, pWapiSta->wapiMskUpdate.dataKey, 16);
memcpy(pWapiSta->wapiMsk.micKey, pWapiSta->wapiMskUpdate.micKey, 16);
pWapiSta->wapiMskUpdate.bTxEnable = pWapiSta->wapiMskUpdate.bSet = false;
}else{
WAPI_TRACE(WAPI_API, "%s(): AE use new update USK!!\n", __FUNCTION__);
pWapiSta->wapiUsk.keyId = pWapiSta->wapiUskUpdate.keyId;
memcpy(pWapiSta->wapiUsk.dataKey, pWapiSta->wapiUskUpdate.dataKey, 16);
memcpy(pWapiSta->wapiUsk.micKey, pWapiSta->wapiUskUpdate.micKey, 16);
pWapiSta->wapiUskUpdate.bTxEnable = pWapiSta->wapiUskUpdate.bSet = false;
}
}
}else{
WAPI_TRACE(WAPI_ERR, "%s: Check MIC Error, Dropped !!!!\n", __FUNCTION__);
return false;
}
pos = pskb->data;
memmove(pos+padapter->wapiInfo.extra_prefix_len, pos, IVOffset);
skb_pull(pskb, padapter->wapiInfo.extra_prefix_len);
WAPI_TRACE(WAPI_RX, "<=========%s\n", __FUNCTION__);
return true;
}
u32 rtw_sms4_encrypt(_adapter *padapter, u8 *pxmitframe)
{
u8 *pframe;
u32 res = _SUCCESS;
WAPI_TRACE(WAPI_TX, "=========>%s\n", __FUNCTION__);
if ((!padapter->WapiSupport) || (!padapter->wapiInfo.bWapiEnable))
{
WAPI_TRACE(WAPI_TX, "<========== %s, WAPI not supported or enabled!\n", __FUNCTION__);
return _FAIL;
}
if(((struct xmit_frame*)pxmitframe)->buf_addr==NULL)
return _FAIL;
pframe = ((struct xmit_frame*)pxmitframe)->buf_addr + TXDESC_OFFSET;
SecSWSMS4Encryption(padapter, pxmitframe);
WAPI_TRACE(WAPI_TX, "<=========%s\n", __FUNCTION__);
return res;
}
u32 rtw_sms4_decrypt(_adapter *padapter, u8 *precvframe)
{
u8 *pframe;
u32 res = _SUCCESS;
WAPI_TRACE(WAPI_RX, "=========>%s\n", __FUNCTION__);
if ((!padapter->WapiSupport) || (!padapter->wapiInfo.bWapiEnable))
{
WAPI_TRACE(WAPI_RX, "<========== %s, WAPI not supported or enabled!\n", __FUNCTION__);
return _FAIL;
}
//drop packet when hw decrypt fail
//return tempraily
return _FAIL;
//pframe=(unsigned char *)((union recv_frame*)precvframe)->u.hdr.rx_data;
if (false == SecSWSMS4Decryption(padapter, precvframe, &padapter->recvpriv))
{
WAPI_TRACE(WAPI_ERR, "%s():SMS4 decrypt frame error\n",__FUNCTION__);
return _FAIL;
}
WAPI_TRACE(WAPI_RX, "<=========%s\n", __FUNCTION__);
return res;
}
#else
u32 rtw_sms4_encrypt(_adapter *padapter, u8 *pxmitframe)
{
WAPI_TRACE(WAPI_TX, "=========>Dummy %s\n", __FUNCTION__);
WAPI_TRACE(WAPI_TX, "<=========Dummy %s\n", __FUNCTION__);
return _SUCCESS;
}
u32 rtw_sms4_decrypt(_adapter *padapter, u8 *precvframe)
{
WAPI_TRACE(WAPI_RX, "=========>Dummy %s\n", __FUNCTION__);
WAPI_TRACE(WAPI_RX, "<=========Dummy %s\n", __FUNCTION__);
return _SUCCESS;
}
#endif
#endif
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