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rtw_security.c
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rtw_security.c
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/******************************************************************************
*
* Copyright(c) 2007 - 2011 Realtek Corporation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* 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, USA
*
*
******************************************************************************/
#define _RTW_SECURITY_C_
#include <drv_types.h>
static const char *_security_type_str[] = {
"N/A",
"WEP40",
"TKIP",
"TKIP_WM",
"AES",
"WEP104",
"SMS4",
"WEP_WPA",
"BIP",
};
const char *security_type_str(u8 value)
{
#ifdef CONFIG_IEEE80211W
if (value <= _BIP_)
#else
if (value <= _WEP_WPA_MIXED_)
#endif
return _security_type_str[value];
return NULL;
}
#ifdef DBG_SW_SEC_CNT
#define WEP_SW_ENC_CNT_INC(sec, ra) \
if (is_broadcast_mac_addr(ra)) \
sec->wep_sw_enc_cnt_bc++; \
else if (is_multicast_mac_addr(ra)) \
sec->wep_sw_enc_cnt_mc++; \
else \
sec->wep_sw_enc_cnt_uc++;
#define WEP_SW_DEC_CNT_INC(sec, ra) \
if (is_broadcast_mac_addr(ra)) \
sec->wep_sw_dec_cnt_bc++; \
else if (is_multicast_mac_addr(ra)) \
sec->wep_sw_dec_cnt_mc++; \
else \
sec->wep_sw_dec_cnt_uc++;
#define TKIP_SW_ENC_CNT_INC(sec, ra) \
if (is_broadcast_mac_addr(ra)) \
sec->tkip_sw_enc_cnt_bc++; \
else if (is_multicast_mac_addr(ra)) \
sec->tkip_sw_enc_cnt_mc++; \
else \
sec->tkip_sw_enc_cnt_uc++;
#define TKIP_SW_DEC_CNT_INC(sec, ra) \
if (is_broadcast_mac_addr(ra)) \
sec->tkip_sw_dec_cnt_bc++; \
else if (is_multicast_mac_addr(ra)) \
sec->tkip_sw_dec_cnt_mc++; \
else \
sec->tkip_sw_dec_cnt_uc++;
#define AES_SW_ENC_CNT_INC(sec, ra) \
if (is_broadcast_mac_addr(ra)) \
sec->aes_sw_enc_cnt_bc++; \
else if (is_multicast_mac_addr(ra)) \
sec->aes_sw_enc_cnt_mc++; \
else \
sec->aes_sw_enc_cnt_uc++;
#define AES_SW_DEC_CNT_INC(sec, ra) \
if (is_broadcast_mac_addr(ra)) \
sec->aes_sw_dec_cnt_bc++; \
else if (is_multicast_mac_addr(ra)) \
sec->aes_sw_dec_cnt_mc++; \
else \
sec->aes_sw_dec_cnt_uc++;
#else
#define WEP_SW_ENC_CNT_INC(sec, ra)
#define WEP_SW_DEC_CNT_INC(sec, ra)
#define TKIP_SW_ENC_CNT_INC(sec, ra)
#define TKIP_SW_DEC_CNT_INC(sec, ra)
#define AES_SW_ENC_CNT_INC(sec, ra)
#define AES_SW_DEC_CNT_INC(sec, ra)
#endif /* DBG_SW_SEC_CNT */
//=====WEP related=====
#define CRC32_POLY 0x04c11db7
struct arc4context
{
u32 x;
u32 y;
u8 state[256];
};
static void arcfour_init(struct arc4context *parc4ctx, u8 * key,u32 key_len)
{
u32 t, u;
u32 keyindex;
u32 stateindex;
u8 * state;
u32 counter;
_func_enter_;
state = parc4ctx->state;
parc4ctx->x = 0;
parc4ctx->y = 0;
for (counter = 0; counter < 256; counter++)
state[counter] = (u8)counter;
keyindex = 0;
stateindex = 0;
for (counter = 0; counter < 256; counter++)
{
t = state[counter];
stateindex = (stateindex + key[keyindex] + t) & 0xff;
u = state[stateindex];
state[stateindex] = (u8)t;
state[counter] = (u8)u;
if (++keyindex >= key_len)
keyindex = 0;
}
_func_exit_;
}
static u32 arcfour_byte( struct arc4context *parc4ctx)
{
u32 x;
u32 y;
u32 sx, sy;
u8 * state;
_func_enter_;
state = parc4ctx->state;
x = (parc4ctx->x + 1) & 0xff;
sx = state[x];
y = (sx + parc4ctx->y) & 0xff;
sy = state[y];
parc4ctx->x = x;
parc4ctx->y = y;
state[y] = (u8)sx;
state[x] = (u8)sy;
_func_exit_;
return state[(sx + sy) & 0xff];
}
static void arcfour_encrypt( struct arc4context *parc4ctx,
u8 * dest,
u8 * src,
u32 len)
{
u32 i;
_func_enter_;
for (i = 0; i < len; i++)
dest[i] = src[i] ^ (unsigned char)arcfour_byte(parc4ctx);
_func_exit_;
}
static sint bcrc32initialized = 0;
static u32 crc32_table[256];
static u8 crc32_reverseBit( u8 data)
{
return( (u8)((data<<7)&0x80) | ((data<<5)&0x40) | ((data<<3)&0x20) | ((data<<1)&0x10) | ((data>>1)&0x08) | ((data>>3)&0x04) | ((data>>5)&0x02) | ((data>>7)&0x01) );
}
static void crc32_init(void)
{
_func_enter_;
if (bcrc32initialized == 1)
goto exit;
else{
sint i, j;
u32 c;
u8 *p=(u8 *)&c, *p1;
u8 k;
c = 0x12340000;
for (i = 0; i < 256; ++i)
{
k = crc32_reverseBit((u8)i);
for (c = ((u32)k) << 24, j = 8; j > 0; --j){
c = c & 0x80000000 ? (c << 1) ^ CRC32_POLY : (c << 1);
}
p1 = (u8 *)&crc32_table[i];
p1[0] = crc32_reverseBit(p[3]);
p1[1] = crc32_reverseBit(p[2]);
p1[2] = crc32_reverseBit(p[1]);
p1[3] = crc32_reverseBit(p[0]);
}
bcrc32initialized= 1;
}
exit:
_func_exit_;
}
static u32 getcrc32(u8 *buf, sint len)
{
u8 *p;
u32 crc;
_func_enter_;
if (bcrc32initialized == 0) crc32_init();
crc = 0xffffffff; /* preload shift register, per CRC-32 spec */
for (p = buf; len > 0; ++p, --len)
{
crc = crc32_table[ (crc ^ *p) & 0xff] ^ (crc >> 8);
}
_func_exit_;
return ~crc; /* transmit complement, per CRC-32 spec */
}
/*
Need to consider the fragment situation
*/
void rtw_wep_encrypt(_adapter *padapter, u8 *pxmitframe)
{ // exclude ICV
unsigned char crc[4];
struct arc4context mycontext;
sint curfragnum,length;
u32 keylength;
u8 *pframe, *payload,*iv; //,*wepkey
u8 wepkey[16];
u8 hw_hdr_offset=0;
struct pkt_attrib *pattrib = &((struct xmit_frame*)pxmitframe)->attrib;
struct security_priv *psecuritypriv=&padapter->securitypriv;
struct xmit_priv *pxmitpriv=&padapter->xmitpriv;
_func_enter_;
if(((struct xmit_frame*)pxmitframe)->buf_addr==NULL)
return;
#ifdef CONFIG_USB_TX_AGGREGATION
hw_hdr_offset = TXDESC_SIZE +
(((struct xmit_frame*)pxmitframe)->pkt_offset * PACKET_OFFSET_SZ);
#else
#ifdef CONFIG_TX_EARLY_MODE
hw_hdr_offset = TXDESC_OFFSET+EARLY_MODE_INFO_SIZE;
#else
hw_hdr_offset = TXDESC_OFFSET;
#endif
#endif
pframe = ((struct xmit_frame*)pxmitframe)->buf_addr + hw_hdr_offset;
//start to encrypt each fragment
if((pattrib->encrypt==_WEP40_)||(pattrib->encrypt==_WEP104_))
{
keylength=psecuritypriv->dot11DefKeylen[psecuritypriv->dot11PrivacyKeyIndex];
for(curfragnum=0;curfragnum<pattrib->nr_frags;curfragnum++)
{
iv=pframe+pattrib->hdrlen;
_rtw_memcpy(&wepkey[0], iv, 3);
_rtw_memcpy(&wepkey[3], &psecuritypriv->dot11DefKey[psecuritypriv->dot11PrivacyKeyIndex].skey[0],keylength);
payload=pframe+pattrib->iv_len+pattrib->hdrlen;
if((curfragnum+1)==pattrib->nr_frags)
{ //the last fragment
length=pattrib->last_txcmdsz-pattrib->hdrlen-pattrib->iv_len- pattrib->icv_len;
*((u32 *)crc)=cpu_to_le32(getcrc32(payload,length));
arcfour_init(&mycontext, wepkey,3+keylength);
arcfour_encrypt(&mycontext, payload, payload, length);
arcfour_encrypt(&mycontext, payload+length, crc, 4);
}
else
{
length=pxmitpriv->frag_len-pattrib->hdrlen-pattrib->iv_len-pattrib->icv_len ;
*((u32 *)crc)=cpu_to_le32(getcrc32(payload,length));
arcfour_init(&mycontext, wepkey,3+keylength);
arcfour_encrypt(&mycontext, payload, payload, length);
arcfour_encrypt(&mycontext, payload+length, crc, 4);
pframe+=pxmitpriv->frag_len;
pframe=(u8 *)RND4((SIZE_PTR)(pframe));
}
}
WEP_SW_ENC_CNT_INC(psecuritypriv, pattrib->ra);
}
_func_exit_;
}
void rtw_wep_decrypt(_adapter *padapter, u8 *precvframe)
{
// exclude ICV
u8 crc[4];
struct arc4context mycontext;
sint length;
u32 keylength;
u8 *pframe, *payload,*iv,wepkey[16];
u8 keyindex;
struct rx_pkt_attrib *prxattrib = &(((union recv_frame*)precvframe)->u.hdr.attrib);
struct security_priv *psecuritypriv=&padapter->securitypriv;
_func_enter_;
pframe=(unsigned char *)((union recv_frame*)precvframe)->u.hdr.rx_data;
//start to decrypt recvframe
if((prxattrib->encrypt==_WEP40_)||(prxattrib->encrypt==_WEP104_))
{
iv=pframe+prxattrib->hdrlen;
//keyindex=(iv[3]&0x3);
keyindex = prxattrib->key_index;
keylength=psecuritypriv->dot11DefKeylen[keyindex];
_rtw_memcpy(&wepkey[0], iv, 3);
//_rtw_memcpy(&wepkey[3], &psecuritypriv->dot11DefKey[psecuritypriv->dot11PrivacyKeyIndex].skey[0],keylength);
_rtw_memcpy(&wepkey[3], &psecuritypriv->dot11DefKey[keyindex].skey[0],keylength);
length= ((union recv_frame *)precvframe)->u.hdr.len-prxattrib->hdrlen-prxattrib->iv_len;
payload=pframe+prxattrib->iv_len+prxattrib->hdrlen;
//decrypt payload include icv
arcfour_init(&mycontext, wepkey,3+keylength);
arcfour_encrypt(&mycontext, payload, payload, length);
//calculate icv and compare the icv
*((u32 *)crc)=le32_to_cpu(getcrc32(payload,length-4));
if(crc[3]!=payload[length-1] || crc[2]!=payload[length-2] || crc[1]!=payload[length-3] || crc[0]!=payload[length-4])
{
RT_TRACE(_module_rtl871x_security_c_,_drv_err_,("rtw_wep_decrypt:icv error crc[3](%x)!=payload[length-1](%x) || crc[2](%x)!=payload[length-2](%x) || crc[1](%x)!=payload[length-3](%x) || crc[0](%x)!=payload[length-4](%x)\n",
crc[3],payload[length-1],crc[2],payload[length-2],crc[1],payload[length-3],crc[0],payload[length-4]));
}
WEP_SW_DEC_CNT_INC(psecuritypriv, prxattrib->ra);
}
_func_exit_;
return;
}
//3 =====TKIP related=====
static u32 secmicgetuint32( u8 * p )
// Convert from Byte[] to Us4Byte32 in a portable way
{
s32 i;
u32 res = 0;
_func_enter_;
for( i=0; i<4; i++ )
{
res |= ((u32)(*p++)) << (8*i);
}
_func_exit_;
return res;
}
static void secmicputuint32( u8 * p, u32 val )
// Convert from Us4Byte32 to Byte[] in a portable way
{
long i;
_func_enter_;
for( i=0; i<4; i++ )
{
*p++ = (u8) (val & 0xff);
val >>= 8;
}
_func_exit_;
}
static void secmicclear(struct mic_data *pmicdata)
{
// Reset the state to the empty message.
_func_enter_;
pmicdata->L = pmicdata->K0;
pmicdata->R = pmicdata->K1;
pmicdata->nBytesInM = 0;
pmicdata->M = 0;
_func_exit_;
}
void rtw_secmicsetkey(struct mic_data *pmicdata, u8 * key )
{
// Set the key
_func_enter_;
pmicdata->K0 = secmicgetuint32( key );
pmicdata->K1 = secmicgetuint32( key + 4 );
// and reset the message
secmicclear(pmicdata);
_func_exit_;
}
void rtw_secmicappendbyte(struct mic_data *pmicdata, u8 b )
{
_func_enter_;
// Append the byte to our word-sized buffer
pmicdata->M |= ((unsigned long)b) << (8*pmicdata->nBytesInM);
pmicdata->nBytesInM++;
// Process the word if it is full.
if( pmicdata->nBytesInM >= 4 )
{
pmicdata->L ^= pmicdata->M;
pmicdata->R ^= ROL32( pmicdata->L, 17 );
pmicdata->L += pmicdata->R;
pmicdata->R ^= ((pmicdata->L & 0xff00ff00) >> 8) | ((pmicdata->L & 0x00ff00ff) << 8);
pmicdata->L += pmicdata->R;
pmicdata->R ^= ROL32( pmicdata->L, 3 );
pmicdata->L += pmicdata->R;
pmicdata->R ^= ROR32( pmicdata->L, 2 );
pmicdata->L += pmicdata->R;
// Clear the buffer
pmicdata->M = 0;
pmicdata->nBytesInM = 0;
}
_func_exit_;
}
void rtw_secmicappend(struct mic_data *pmicdata, u8 * src, u32 nbytes )
{
_func_enter_;
// This is simple
while( nbytes > 0 )
{
rtw_secmicappendbyte(pmicdata, *src++ );
nbytes--;
}
_func_exit_;
}
void rtw_secgetmic(struct mic_data *pmicdata, u8 * dst )
{
_func_enter_;
// Append the minimum padding
rtw_secmicappendbyte(pmicdata, 0x5a );
rtw_secmicappendbyte(pmicdata, 0 );
rtw_secmicappendbyte(pmicdata, 0 );
rtw_secmicappendbyte(pmicdata, 0 );
rtw_secmicappendbyte(pmicdata, 0 );
// and then zeroes until the length is a multiple of 4
while( pmicdata->nBytesInM != 0 )
{
rtw_secmicappendbyte(pmicdata, 0 );
}
// The appendByte function has already computed the result.
secmicputuint32( dst, pmicdata->L );
secmicputuint32( dst+4, pmicdata->R );
// Reset to the empty message.
secmicclear(pmicdata);
_func_exit_;
}
void rtw_seccalctkipmic(u8 * key,u8 *header,u8 *data,u32 data_len,u8 *mic_code, u8 pri)
{
struct mic_data micdata;
u8 priority[4]={0x0,0x0,0x0,0x0};
_func_enter_;
rtw_secmicsetkey(&micdata, key);
priority[0]=pri;
/* Michael MIC pseudo header: DA, SA, 3 x 0, Priority */
if(header[1]&1){ //ToDS==1
rtw_secmicappend(&micdata, &header[16], 6); //DA
if(header[1]&2) //From Ds==1
rtw_secmicappend(&micdata, &header[24], 6);
else
rtw_secmicappend(&micdata, &header[10], 6);
}
else{ //ToDS==0
rtw_secmicappend(&micdata, &header[4], 6); //DA
if(header[1]&2) //From Ds==1
rtw_secmicappend(&micdata, &header[16], 6);
else
rtw_secmicappend(&micdata, &header[10], 6);
}
rtw_secmicappend(&micdata, &priority[0], 4);
rtw_secmicappend(&micdata, data, data_len);
rtw_secgetmic(&micdata,mic_code);
_func_exit_;
}
/* macros for extraction/creation of unsigned char/unsigned short values */
#define RotR1(v16) ((((v16) >> 1) & 0x7FFF) ^ (((v16) & 1) << 15))
#define Lo8(v16) ((u8)( (v16) & 0x00FF))
#define Hi8(v16) ((u8)(((v16) >> 8) & 0x00FF))
#define Lo16(v32) ((u16)( (v32) & 0xFFFF))
#define Hi16(v32) ((u16)(((v32) >>16) & 0xFFFF))
#define Mk16(hi,lo) ((lo) ^ (((u16)(hi)) << 8))
/* select the Nth 16-bit word of the temporal key unsigned char array TK[] */
#define TK16(N) Mk16(tk[2*(N)+1],tk[2*(N)])
/* S-box lookup: 16 bits --> 16 bits */
#define _S_(v16) (Sbox1[0][Lo8(v16)] ^ Sbox1[1][Hi8(v16)])
/* fixed algorithm "parameters" */
#define PHASE1_LOOP_CNT 8 /* this needs to be "big enough" */
#define TA_SIZE 6 /* 48-bit transmitter address */
#define TK_SIZE 16 /* 128-bit temporal key */
#define P1K_SIZE 10 /* 80-bit Phase1 key */
#define RC4_KEY_SIZE 16 /* 128-bit RC4KEY (104 bits unknown) */
/* 2-unsigned char by 2-unsigned char subset of the full AES S-box table */
static const unsigned short Sbox1[2][256]= /* Sbox for hash (can be in ROM) */
{ {
0xC6A5,0xF884,0xEE99,0xF68D,0xFF0D,0xD6BD,0xDEB1,0x9154,
0x6050,0x0203,0xCEA9,0x567D,0xE719,0xB562,0x4DE6,0xEC9A,
0x8F45,0x1F9D,0x8940,0xFA87,0xEF15,0xB2EB,0x8EC9,0xFB0B,
0x41EC,0xB367,0x5FFD,0x45EA,0x23BF,0x53F7,0xE496,0x9B5B,
0x75C2,0xE11C,0x3DAE,0x4C6A,0x6C5A,0x7E41,0xF502,0x834F,
0x685C,0x51F4,0xD134,0xF908,0xE293,0xAB73,0x6253,0x2A3F,
0x080C,0x9552,0x4665,0x9D5E,0x3028,0x37A1,0x0A0F,0x2FB5,
0x0E09,0x2436,0x1B9B,0xDF3D,0xCD26,0x4E69,0x7FCD,0xEA9F,
0x121B,0x1D9E,0x5874,0x342E,0x362D,0xDCB2,0xB4EE,0x5BFB,
0xA4F6,0x764D,0xB761,0x7DCE,0x527B,0xDD3E,0x5E71,0x1397,
0xA6F5,0xB968,0x0000,0xC12C,0x4060,0xE31F,0x79C8,0xB6ED,
0xD4BE,0x8D46,0x67D9,0x724B,0x94DE,0x98D4,0xB0E8,0x854A,
0xBB6B,0xC52A,0x4FE5,0xED16,0x86C5,0x9AD7,0x6655,0x1194,
0x8ACF,0xE910,0x0406,0xFE81,0xA0F0,0x7844,0x25BA,0x4BE3,
0xA2F3,0x5DFE,0x80C0,0x058A,0x3FAD,0x21BC,0x7048,0xF104,
0x63DF,0x77C1,0xAF75,0x4263,0x2030,0xE51A,0xFD0E,0xBF6D,
0x814C,0x1814,0x2635,0xC32F,0xBEE1,0x35A2,0x88CC,0x2E39,
0x9357,0x55F2,0xFC82,0x7A47,0xC8AC,0xBAE7,0x322B,0xE695,
0xC0A0,0x1998,0x9ED1,0xA37F,0x4466,0x547E,0x3BAB,0x0B83,
0x8CCA,0xC729,0x6BD3,0x283C,0xA779,0xBCE2,0x161D,0xAD76,
0xDB3B,0x6456,0x744E,0x141E,0x92DB,0x0C0A,0x486C,0xB8E4,
0x9F5D,0xBD6E,0x43EF,0xC4A6,0x39A8,0x31A4,0xD337,0xF28B,
0xD532,0x8B43,0x6E59,0xDAB7,0x018C,0xB164,0x9CD2,0x49E0,
0xD8B4,0xACFA,0xF307,0xCF25,0xCAAF,0xF48E,0x47E9,0x1018,
0x6FD5,0xF088,0x4A6F,0x5C72,0x3824,0x57F1,0x73C7,0x9751,
0xCB23,0xA17C,0xE89C,0x3E21,0x96DD,0x61DC,0x0D86,0x0F85,
0xE090,0x7C42,0x71C4,0xCCAA,0x90D8,0x0605,0xF701,0x1C12,
0xC2A3,0x6A5F,0xAEF9,0x69D0,0x1791,0x9958,0x3A27,0x27B9,
0xD938,0xEB13,0x2BB3,0x2233,0xD2BB,0xA970,0x0789,0x33A7,
0x2DB6,0x3C22,0x1592,0xC920,0x8749,0xAAFF,0x5078,0xA57A,
0x038F,0x59F8,0x0980,0x1A17,0x65DA,0xD731,0x84C6,0xD0B8,
0x82C3,0x29B0,0x5A77,0x1E11,0x7BCB,0xA8FC,0x6DD6,0x2C3A,
},
{ /* second half of table is unsigned char-reversed version of first! */
0xA5C6,0x84F8,0x99EE,0x8DF6,0x0DFF,0xBDD6,0xB1DE,0x5491,
0x5060,0x0302,0xA9CE,0x7D56,0x19E7,0x62B5,0xE64D,0x9AEC,
0x458F,0x9D1F,0x4089,0x87FA,0x15EF,0xEBB2,0xC98E,0x0BFB,
0xEC41,0x67B3,0xFD5F,0xEA45,0xBF23,0xF753,0x96E4,0x5B9B,
0xC275,0x1CE1,0xAE3D,0x6A4C,0x5A6C,0x417E,0x02F5,0x4F83,
0x5C68,0xF451,0x34D1,0x08F9,0x93E2,0x73AB,0x5362,0x3F2A,
0x0C08,0x5295,0x6546,0x5E9D,0x2830,0xA137,0x0F0A,0xB52F,
0x090E,0x3624,0x9B1B,0x3DDF,0x26CD,0x694E,0xCD7F,0x9FEA,
0x1B12,0x9E1D,0x7458,0x2E34,0x2D36,0xB2DC,0xEEB4,0xFB5B,
0xF6A4,0x4D76,0x61B7,0xCE7D,0x7B52,0x3EDD,0x715E,0x9713,
0xF5A6,0x68B9,0x0000,0x2CC1,0x6040,0x1FE3,0xC879,0xEDB6,
0xBED4,0x468D,0xD967,0x4B72,0xDE94,0xD498,0xE8B0,0x4A85,
0x6BBB,0x2AC5,0xE54F,0x16ED,0xC586,0xD79A,0x5566,0x9411,
0xCF8A,0x10E9,0x0604,0x81FE,0xF0A0,0x4478,0xBA25,0xE34B,
0xF3A2,0xFE5D,0xC080,0x8A05,0xAD3F,0xBC21,0x4870,0x04F1,
0xDF63,0xC177,0x75AF,0x6342,0x3020,0x1AE5,0x0EFD,0x6DBF,
0x4C81,0x1418,0x3526,0x2FC3,0xE1BE,0xA235,0xCC88,0x392E,
0x5793,0xF255,0x82FC,0x477A,0xACC8,0xE7BA,0x2B32,0x95E6,
0xA0C0,0x9819,0xD19E,0x7FA3,0x6644,0x7E54,0xAB3B,0x830B,
0xCA8C,0x29C7,0xD36B,0x3C28,0x79A7,0xE2BC,0x1D16,0x76AD,
0x3BDB,0x5664,0x4E74,0x1E14,0xDB92,0x0A0C,0x6C48,0xE4B8,
0x5D9F,0x6EBD,0xEF43,0xA6C4,0xA839,0xA431,0x37D3,0x8BF2,
0x32D5,0x438B,0x596E,0xB7DA,0x8C01,0x64B1,0xD29C,0xE049,
0xB4D8,0xFAAC,0x07F3,0x25CF,0xAFCA,0x8EF4,0xE947,0x1810,
0xD56F,0x88F0,0x6F4A,0x725C,0x2438,0xF157,0xC773,0x5197,
0x23CB,0x7CA1,0x9CE8,0x213E,0xDD96,0xDC61,0x860D,0x850F,
0x90E0,0x427C,0xC471,0xAACC,0xD890,0x0506,0x01F7,0x121C,
0xA3C2,0x5F6A,0xF9AE,0xD069,0x9117,0x5899,0x273A,0xB927,
0x38D9,0x13EB,0xB32B,0x3322,0xBBD2,0x70A9,0x8907,0xA733,
0xB62D,0x223C,0x9215,0x20C9,0x4987,0xFFAA,0x7850,0x7AA5,
0x8F03,0xF859,0x8009,0x171A,0xDA65,0x31D7,0xC684,0xB8D0,
0xC382,0xB029,0x775A,0x111E,0xCB7B,0xFCA8,0xD66D,0x3A2C,
}
};
/*
**********************************************************************
* Routine: Phase 1 -- generate P1K, given TA, TK, IV32
*
* Inputs:
* tk[] = temporal key [128 bits]
* ta[] = transmitter's MAC address [ 48 bits]
* iv32 = upper 32 bits of IV [ 32 bits]
* Output:
* p1k[] = Phase 1 key [ 80 bits]
*
* Note:
* This function only needs to be called every 2**16 packets,
* although in theory it could be called every packet.
*
**********************************************************************
*/
static void phase1(u16 *p1k,const u8 *tk,const u8 *ta,u32 iv32)
{
sint i;
_func_enter_;
/* Initialize the 80 bits of P1K[] from IV32 and TA[0..5] */
p1k[0] = Lo16(iv32);
p1k[1] = Hi16(iv32);
p1k[2] = Mk16(ta[1],ta[0]); /* use TA[] as little-endian */
p1k[3] = Mk16(ta[3],ta[2]);
p1k[4] = Mk16(ta[5],ta[4]);
/* Now compute an unbalanced Feistel cipher with 80-bit block */
/* size on the 80-bit block P1K[], using the 128-bit key TK[] */
for (i=0; i < PHASE1_LOOP_CNT ;i++)
{ /* Each add operation here is mod 2**16 */
p1k[0] += _S_(p1k[4] ^ TK16((i&1)+0));
p1k[1] += _S_(p1k[0] ^ TK16((i&1)+2));
p1k[2] += _S_(p1k[1] ^ TK16((i&1)+4));
p1k[3] += _S_(p1k[2] ^ TK16((i&1)+6));
p1k[4] += _S_(p1k[3] ^ TK16((i&1)+0));
p1k[4] += (unsigned short)i; /* avoid "slide attacks" */
}
_func_exit_;
}
/*
**********************************************************************
* Routine: Phase 2 -- generate RC4KEY, given TK, P1K, IV16
*
* Inputs:
* tk[] = Temporal key [128 bits]
* p1k[] = Phase 1 output key [ 80 bits]
* iv16 = low 16 bits of IV counter [ 16 bits]
* Output:
* rc4key[] = the key used to encrypt the packet [128 bits]
*
* Note:
* The value {TA,IV32,IV16} for Phase1/Phase2 must be unique
* across all packets using the same key TK value. Then, for a
* given value of TK[], this TKIP48 construction guarantees that
* the final RC4KEY value is unique across all packets.
*
* Suggested implementation optimization: if PPK[] is "overlaid"
* appropriately on RC4KEY[], there is no need for the final
* for loop below that copies the PPK[] result into RC4KEY[].
*
**********************************************************************
*/
static void phase2(u8 *rc4key,const u8 *tk,const u16 *p1k,u16 iv16)
{
sint i;
u16 PPK[6]; /* temporary key for mixing */
_func_enter_;
/* Note: all adds in the PPK[] equations below are mod 2**16 */
for (i=0;i<5;i++) PPK[i]=p1k[i]; /* first, copy P1K to PPK */
PPK[5] = p1k[4] +iv16; /* next, add in IV16 */
/* Bijective non-linear mixing of the 96 bits of PPK[0..5] */
PPK[0] += _S_(PPK[5] ^ TK16(0)); /* Mix key in each "round" */
PPK[1] += _S_(PPK[0] ^ TK16(1));
PPK[2] += _S_(PPK[1] ^ TK16(2));
PPK[3] += _S_(PPK[2] ^ TK16(3));
PPK[4] += _S_(PPK[3] ^ TK16(4));
PPK[5] += _S_(PPK[4] ^ TK16(5)); /* Total # S-box lookups == 6 */
/* Final sweep: bijective, "linear". Rotates kill LSB correlations */
PPK[0] += RotR1(PPK[5] ^ TK16(6));
PPK[1] += RotR1(PPK[0] ^ TK16(7)); /* Use all of TK[] in Phase2 */
PPK[2] += RotR1(PPK[1]);
PPK[3] += RotR1(PPK[2]);
PPK[4] += RotR1(PPK[3]);
PPK[5] += RotR1(PPK[4]);
/* Note: At this point, for a given key TK[0..15], the 96-bit output */
/* value PPK[0..5] is guaranteed to be unique, as a function */
/* of the 96-bit "input" value {TA,IV32,IV16}. That is, P1K */
/* is now a keyed permutation of {TA,IV32,IV16}. */
/* Set RC4KEY[0..3], which includes "cleartext" portion of RC4 key */
rc4key[0] = Hi8(iv16); /* RC4KEY[0..2] is the WEP IV */
rc4key[1] =(Hi8(iv16) | 0x20) & 0x7F; /* Help avoid weak (FMS) keys */
rc4key[2] = Lo8(iv16);
rc4key[3] = Lo8((PPK[5] ^ TK16(0)) >> 1);
/* Copy 96 bits of PPK[0..5] to RC4KEY[4..15] (little-endian) */
for (i=0;i<6;i++)
{
rc4key[4+2*i] = Lo8(PPK[i]);
rc4key[5+2*i] = Hi8(PPK[i]);
}
_func_exit_;
}
//The hlen isn't include the IV
u32 rtw_tkip_encrypt(_adapter *padapter, u8 *pxmitframe)
{ // exclude ICV
u16 pnl;
u32 pnh;
u8 rc4key[16];
u8 ttkey[16];
u8 crc[4];
u8 hw_hdr_offset = 0;
struct arc4context mycontext;
sint curfragnum,length;
u32 prwskeylen;
u8 *pframe, *payload,*iv,*prwskey;
union pn48 dot11txpn;
//struct sta_info *stainfo;
struct pkt_attrib *pattrib = &((struct xmit_frame *)pxmitframe)->attrib;
struct security_priv *psecuritypriv=&padapter->securitypriv;
struct xmit_priv *pxmitpriv=&padapter->xmitpriv;
u32 res=_SUCCESS;
_func_enter_;
if(((struct xmit_frame*)pxmitframe)->buf_addr==NULL)
return _FAIL;
#ifdef CONFIG_USB_TX_AGGREGATION
hw_hdr_offset = TXDESC_SIZE +
(((struct xmit_frame*)pxmitframe)->pkt_offset * PACKET_OFFSET_SZ);
#else
#ifdef CONFIG_TX_EARLY_MODE
hw_hdr_offset = TXDESC_OFFSET+EARLY_MODE_INFO_SIZE;
#else
hw_hdr_offset = TXDESC_OFFSET;
#endif
#endif
pframe = ((struct xmit_frame*)pxmitframe)->buf_addr + hw_hdr_offset;
//4 start to encrypt each fragment
if(pattrib->encrypt==_TKIP_){
/*
if(pattrib->psta)
{
stainfo = pattrib->psta;
}
else
{
DBG_871X("%s, call rtw_get_stainfo()\n", __func__);
stainfo=rtw_get_stainfo(&padapter->stapriv ,&pattrib->ra[0] );
}
*/
//if (stainfo!=NULL)
{
/*
if(!(stainfo->state &_FW_LINKED))
{
DBG_871X("%s, psta->state(0x%x) != _FW_LINKED\n", __func__, stainfo->state);
return _FAIL;
}
*/
RT_TRACE(_module_rtl871x_security_c_,_drv_err_,("rtw_tkip_encrypt: stainfo!=NULL!!!\n"));
if(IS_MCAST(pattrib->ra))
{
prwskey=psecuritypriv->dot118021XGrpKey[psecuritypriv->dot118021XGrpKeyid].skey;
}
else
{
//prwskey=&stainfo->dot118021x_UncstKey.skey[0];
prwskey=pattrib->dot118021x_UncstKey.skey;
}
prwskeylen=16;
for(curfragnum=0;curfragnum<pattrib->nr_frags;curfragnum++){
iv=pframe+pattrib->hdrlen;
payload=pframe+pattrib->iv_len+pattrib->hdrlen;
GET_TKIP_PN(iv, dot11txpn);
pnl=(u16)(dot11txpn.val);
pnh=(u32)(dot11txpn.val>>16);
phase1((u16 *)&ttkey[0],prwskey,&pattrib->ta[0],pnh);
phase2(&rc4key[0],prwskey,(u16 *)&ttkey[0],pnl);
if((curfragnum+1)==pattrib->nr_frags){ //4 the last fragment
length=pattrib->last_txcmdsz-pattrib->hdrlen-pattrib->iv_len- pattrib->icv_len;
RT_TRACE(_module_rtl871x_security_c_,_drv_info_,("pattrib->iv_len =%x, pattrib->icv_len =%x\n", pattrib->iv_len,pattrib->icv_len));
*((u32 *)crc)=cpu_to_le32(getcrc32(payload,length));/* modified by Amy*/
arcfour_init(&mycontext, rc4key,16);
arcfour_encrypt(&mycontext, payload, payload, length);
arcfour_encrypt(&mycontext, payload+length, crc, 4);
}
else{
length=pxmitpriv->frag_len-pattrib->hdrlen-pattrib->iv_len-pattrib->icv_len ;
*((u32 *)crc)=cpu_to_le32(getcrc32(payload,length));/* modified by Amy*/
arcfour_init(&mycontext,rc4key,16);
arcfour_encrypt(&mycontext, payload, payload, length);
arcfour_encrypt(&mycontext, payload+length, crc, 4);
pframe+=pxmitpriv->frag_len;
pframe=(u8 *)RND4((SIZE_PTR)(pframe));
}
}
TKIP_SW_ENC_CNT_INC(psecuritypriv,pattrib->ra);
}
/*
else{
RT_TRACE(_module_rtl871x_security_c_,_drv_err_,("rtw_tkip_encrypt: stainfo==NULL!!!\n"));
DBG_871X("%s, psta==NUL\n", __func__);
res=_FAIL;
}
*/
}
_func_exit_;
return res;
}
//The hlen isn't include the IV
u32 rtw_tkip_decrypt(_adapter *padapter, u8 *precvframe)
{ // exclude ICV
u16 pnl;
u32 pnh;
u8 rc4key[16];
u8 ttkey[16];
u8 crc[4];
struct arc4context mycontext;
sint length;
u32 prwskeylen;
u8 *pframe, *payload,*iv,*prwskey;
union pn48 dot11txpn;
struct sta_info *stainfo;
struct rx_pkt_attrib *prxattrib = &((union recv_frame *)precvframe)->u.hdr.attrib;
struct security_priv *psecuritypriv=&padapter->securitypriv;
// struct recv_priv *precvpriv=&padapter->recvpriv;
u32 res=_SUCCESS;
_func_enter_;
pframe=(unsigned char *)((union recv_frame*)precvframe)->u.hdr.rx_data;
//4 start to decrypt recvframe
if(prxattrib->encrypt==_TKIP_){
stainfo=rtw_get_stainfo(&padapter->stapriv ,&prxattrib->ta[0] );
if (stainfo!=NULL){
if(IS_MCAST(prxattrib->ra))
{
static u32 start = 0;
static u32 no_gkey_bc_cnt = 0;
static u32 no_gkey_mc_cnt = 0;
if(psecuritypriv->binstallGrpkey==_FALSE)
{
res=_FAIL;
if (start == 0)
start = rtw_get_current_time();
if (is_broadcast_mac_addr(prxattrib->ra))
no_gkey_bc_cnt++;
else
no_gkey_mc_cnt++;
if (rtw_get_passing_time_ms(start) > 1000) {
if (no_gkey_bc_cnt || no_gkey_mc_cnt) {
DBG_871X_LEVEL(_drv_always_, FUNC_ADPT_FMT" no_gkey_bc_cnt:%u, no_gkey_mc_cnt:%u\n",
FUNC_ADPT_ARG(padapter), no_gkey_bc_cnt, no_gkey_mc_cnt);
}
start = rtw_get_current_time();
no_gkey_bc_cnt = 0;
no_gkey_mc_cnt = 0;
}
goto exit;
}
if (no_gkey_bc_cnt || no_gkey_mc_cnt) {
DBG_871X_LEVEL(_drv_always_, FUNC_ADPT_FMT" gkey installed. no_gkey_bc_cnt:%u, no_gkey_mc_cnt:%u\n",
FUNC_ADPT_ARG(padapter), no_gkey_bc_cnt, no_gkey_mc_cnt);
}
start = 0;
no_gkey_bc_cnt = 0;
no_gkey_mc_cnt = 0;
//DBG_871X("rx bc/mc packets, to perform sw rtw_tkip_decrypt\n");
//prwskey = psecuritypriv->dot118021XGrpKey[psecuritypriv->dot118021XGrpKeyid].skey;
prwskey = psecuritypriv->dot118021XGrpKey[prxattrib->key_index].skey;
prwskeylen=16;
}
else
{
prwskey=&stainfo->dot118021x_UncstKey.skey[0];
prwskeylen=16;
}
iv=pframe+prxattrib->hdrlen;
payload=pframe+prxattrib->iv_len+prxattrib->hdrlen;
length= ((union recv_frame *)precvframe)->u.hdr.len-prxattrib->hdrlen-prxattrib->iv_len;
GET_TKIP_PN(iv, dot11txpn);
pnl=(u16)(dot11txpn.val);
pnh=(u32)(dot11txpn.val>>16);
phase1((u16 *)&ttkey[0],prwskey,&prxattrib->ta[0],pnh);
phase2(&rc4key[0],prwskey,(unsigned short *)&ttkey[0],pnl);
//4 decrypt payload include icv
arcfour_init(&mycontext, rc4key,16);
arcfour_encrypt(&mycontext, payload, payload, length);
*((u32 *)crc)=le32_to_cpu(getcrc32(payload,length-4));
if(crc[3]!=payload[length-1] || crc[2]!=payload[length-2] || crc[1]!=payload[length-3] || crc[0]!=payload[length-4])
{
RT_TRACE(_module_rtl871x_security_c_,_drv_err_,("rtw_wep_decrypt:icv error crc[3](%x)!=payload[length-1](%x) || crc[2](%x)!=payload[length-2](%x) || crc[1](%x)!=payload[length-3](%x) || crc[0](%x)!=payload[length-4](%x)\n",
crc[3],payload[length-1],crc[2],payload[length-2],crc[1],payload[length-3],crc[0],payload[length-4]));
res=_FAIL;
}
TKIP_SW_DEC_CNT_INC(psecuritypriv, prxattrib->ra);
}
else{
RT_TRACE(_module_rtl871x_security_c_,_drv_err_,("rtw_tkip_decrypt: stainfo==NULL!!!\n"));
res=_FAIL;
}
}
_func_exit_;
exit:
return res;
}
//3 =====AES related=====
#define MAX_MSG_SIZE 2048
/*****************************/
/******** SBOX Table *********/
/*****************************/
static u8 sbox_table[256] =
{
0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5,
0x30, 0x01, 0x67, 0x2b, 0xfe, 0xd7, 0xab, 0x76,
0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0,
0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0,
0xb7, 0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7, 0xcc,
0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15,
0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a,
0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75,
0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0,
0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84,
0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b,
0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf,
0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85,
0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c, 0x9f, 0xa8,
0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5,
0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2,