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rtl8188eu/core/rtw_security.c
Larry Finger 19db43ecbd rtl8188eu: Backport kernel version 
This driver was added to the kernel with version 3.12. The changes in that
version are now brought back to the GitHub repo. Essentually all of the code
is updated.

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
2013-10-19 12:45:47 -05:00

1779 lines
58 KiB
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 <osdep_service.h>
#include <drv_types.h>
#include <wifi.h>
#include <osdep_intf.h>
/* 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 int bcrc32initialized;
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 {
int 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 __le32 getcrc32(u8 *buf, int 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 cpu_to_le32(~crc); /* transmit complement, per CRC-32 spec */
}
/*
Need to consider the fragment situation
*/
void rtw_wep_encrypt(struct adapter *padapter, u8 *pxmitframe)
{ /* exclude ICV */
unsigned char crc[4];
struct arc4context mycontext;
int 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;
hw_hdr_offset = TXDESC_SIZE +
(((struct xmit_frame *)pxmitframe)->pkt_offset * PACKET_OFFSET_SZ);
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;
memcpy(&wepkey[0], iv, 3);
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;
*((__le32 *)crc) = 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;
*((__le32 *)crc) = 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_t)(pframe));
}
}
}
_func_exit_;
}
void rtw_wep_decrypt(struct adapter *padapter, u8 *precvframe)
{
/* exclude ICV */
u8 crc[4];
struct arc4context mycontext;
int 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 = prxattrib->key_index;
keylength = psecuritypriv->dot11DefKeylen[keyindex];
memcpy(&wepkey[0], iv, 3);
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 */
*((__le32 *)crc) = 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 (%4ph)!=payload (%4ph)\n",
&crc, &payload[length-4]));
}
}
_func_exit_;
return;
}
/* 3 ===== TKIP related ===== */
static u32 secmicgetuint32(u8 *p)
/* Convert from Byte[] to Us3232 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 Us3232 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)
{
int 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)
{
int 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(struct 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;
int curfragnum, length;
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;
hw_hdr_offset = TXDESC_SIZE +
(((struct xmit_frame *)pxmitframe)->pkt_offset * PACKET_OFFSET_SZ);
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
stainfo = rtw_get_stainfo(&padapter->stapriv, &pattrib->ra[0]);
if (stainfo != NULL) {
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];
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));
*((__le32 *)crc) = 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 ;
*((__le32 *)crc) = 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_t)(pframe));
}
}
} else {
RT_TRACE(_module_rtl871x_security_c_, _drv_err_, ("rtw_tkip_encrypt: stainfo==NULL!!!\n"));
res = _FAIL;
}
}
_func_exit_;
return res;
}
/* The hlen isn't include the IV */
u32 rtw_tkip_decrypt(struct adapter *padapter, u8 *precvframe)
{ /* exclude ICV */
u16 pnl;
u32 pnh;
u8 rc4key[16];
u8 ttkey[16];
u8 crc[4];
struct arc4context mycontext;
int length;
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;
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)) {
if (!psecuritypriv->binstallGrpkey) {
res = _FAIL;
DBG_88E("%s:rx bc/mc packets, but didn't install group key!!!!!!!!!!\n", __func__);
goto exit;
}
prwskey = psecuritypriv->dot118021XGrpKey[prxattrib->key_index].skey;
} else {
RT_TRACE(_module_rtl871x_security_c_, _drv_err_, ("rtw_tkip_decrypt: stainfo!= NULL!!!\n"));
prwskey = &stainfo->dot118021x_UncstKey.skey[0];
}
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);
*((__le32 *)crc) = 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 (%4ph)!=payload (%4ph)\n",
&crc, &payload[length-4]));
res = _FAIL;
}
} 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,
0xcd, 0x0c, 0x13, 0xec, 0x5f, 0x97, 0x44, 0x17,
0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73,
0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88,
0x46, 0xee, 0xb8, 0x14, 0xde, 0x5e, 0x0b, 0xdb,
0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c,
0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79,
0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5, 0x4e, 0xa9,
0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08,
0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6,
0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a,
0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e,
0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e,
0xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9, 0x8e, 0x94,
0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf,
0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68,
0x41, 0x99, 0x2d, 0x0f, 0xb0, 0x54, 0xbb, 0x16
};
/*****************************/
/**** Function Prototypes ****/
/*****************************/
static void bitwise_xor(u8 *ina, u8 *inb, u8 *out);
static void construct_mic_iv(u8 *mic_header1, int qc_exists, int a4_exists, u8 *mpdu, uint payload_length, u8 *pn_vector);
static void construct_mic_header1(u8 *mic_header1, int header_length, u8 *mpdu);
static void construct_mic_header2(u8 *mic_header2, u8 *mpdu, int a4_exists, int qc_exists);
static void construct_ctr_preload(u8 *ctr_preload, int a4_exists, int qc_exists, u8 *mpdu, u8 *pn_vector, int c);
static void xor_128(u8 *a, u8 *b, u8 *out);
static void xor_32(u8 *a, u8 *b, u8 *out);
static u8 sbox(u8 a);
static void next_key(u8 *key, int round);
static void byte_sub(u8 *in, u8 *out);
static void shift_row(u8 *in, u8 *out);
static void mix_column(u8 *in, u8 *out);
static void aes128k128d(u8 *key, u8 *data, u8 *ciphertext);
/****************************************/
/* aes128k128d() */
/* Performs a 128 bit AES encrypt with */
/* 128 bit data. */
/****************************************/
static void xor_128(u8 *a, u8 *b, u8 *out)
{
int i;
_func_enter_;
for (i = 0; i < 16; i++)
out[i] = a[i] ^ b[i];
_func_exit_;
}
static void xor_32(u8 *a, u8 *b, u8 *out)
{
int i;
_func_enter_;
for (i = 0; i < 4; i++)
out[i] = a[i] ^ b[i];
_func_exit_;
}
static u8 sbox(u8 a)
{
return sbox_table[(int)a];
}
static void next_key(u8 *key, int round)
{
u8 rcon;
u8 sbox_key[4];
u8 rcon_table[12] = {
0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80,
0x1b, 0x36, 0x36, 0x36
};
_func_enter_;
sbox_key[0] = sbox(key[13]);
sbox_key[1] = sbox(key[14]);
sbox_key[2] = sbox(key[15]);
sbox_key[3] = sbox(key[12]);
rcon = rcon_table[round];
xor_32(&key[0], sbox_key, &key[0]);
key[0] = key[0] ^ rcon;
xor_32(&key[4], &key[0], &key[4]);
xor_32(&key[8], &key[4], &key[8]);
xor_32(&key[12], &key[8], &key[12]);
_func_exit_;
}
static void byte_sub(u8 *in, u8 *out)
{
int i;
_func_enter_;
for (i = 0; i < 16; i++)
out[i] = sbox(in[i]);
_func_exit_;
}
static void shift_row(u8 *in, u8 *out)
{
_func_enter_;
out[0] = in[0];
out[1] = in[5];
out[2] = in[10];
out[3] = in[15];
out[4] = in[4];
out[5] = in[9];
out[6] = in[14];
out[7] = in[3];
out[8] = in[8];
out[9] = in[13];
out[10] = in[2];
out[11] = in[7];
out[12] = in[12];
out[13] = in[1];
out[14] = in[6];
out[15] = in[11];
_func_exit_;
}
static void mix_column(u8 *in, u8 *out)
{
int i;
u8 add1b[4];
u8 add1bf7[4];
u8 rotl[4];
u8 swap_halfs[4];
u8 andf7[4];
u8 rotr[4];
u8 temp[4];
u8 tempb[4];
_func_enter_;
for (i = 0 ; i < 4; i++) {
if ((in[i] & 0x80) == 0x80)
add1b[i] = 0x1b;
else
add1b[i] = 0x00;
}
swap_halfs[0] = in[2]; /* Swap halfs */
swap_halfs[1] = in[3];
swap_halfs[2] = in[0];
swap_halfs[3] = in[1];
rotl[0] = in[3]; /* Rotate left 8 bits */
rotl[1] = in[0];
rotl[2] = in[1];
rotl[3] = in[2];
andf7[0] = in[0] & 0x7f;
andf7[1] = in[1] & 0x7f;
andf7[2] = in[2] & 0x7f;
andf7[3] = in[3] & 0x7f;
for (i = 3; i > 0; i--) { /* logical shift left 1 bit */
andf7[i] = andf7[i] << 1;
if ((andf7[i-1] & 0x80) == 0x80)
andf7[i] = (andf7[i] | 0x01);
}
andf7[0] = andf7[0] << 1;
andf7[0] = andf7[0] & 0xfe;
xor_32(add1b, andf7, add1bf7);
xor_32(in, add1bf7, rotr);
temp[0] = rotr[0]; /* Rotate right 8 bits */
rotr[0] = rotr[1];
rotr[1] = rotr[2];
rotr[2] = rotr[3];
rotr[3] = temp[0];
xor_32(add1bf7, rotr, temp);
xor_32(swap_halfs, rotl, tempb);
xor_32(temp, tempb, out);
_func_exit_;
}
static void aes128k128d(u8 *key, u8 *data, u8 *ciphertext)
{
int round;
int i;
u8 intermediatea[16];
u8 intermediateb[16];
u8 round_key[16];
_func_enter_;
for (i = 0; i < 16; i++)
round_key[i] = key[i];
for (round = 0; round < 11; round++) {
if (round == 0) {
xor_128(round_key, data, ciphertext);
next_key(round_key, round);
} else if (round == 10) {
byte_sub(ciphertext, intermediatea);
shift_row(intermediatea, intermediateb);
xor_128(intermediateb, round_key, ciphertext);
} else { /* 1 - 9 */
byte_sub(ciphertext, intermediatea);
shift_row(intermediatea, intermediateb);
mix_column(&intermediateb[0], &intermediatea[0]);
mix_column(&intermediateb[4], &intermediatea[4]);
mix_column(&intermediateb[8], &intermediatea[8]);
mix_column(&intermediateb[12], &intermediatea[12]);
xor_128(intermediatea, round_key, ciphertext);
next_key(round_key, round);
}
}
_func_exit_;
}
/************************************************/
/* construct_mic_iv() */
/* Builds the MIC IV from header fields and PN */
/************************************************/
static void construct_mic_iv(u8 *mic_iv, int qc_exists, int a4_exists, u8 *mpdu,
uint payload_length, u8 *pn_vector)
{
int i;
_func_enter_;
mic_iv[0] = 0x59;
if (qc_exists && a4_exists)
mic_iv[1] = mpdu[30] & 0x0f; /* QoS_TC */
if (qc_exists && !a4_exists)
mic_iv[1] = mpdu[24] & 0x0f; /* mute bits 7-4 */
if (!qc_exists)
mic_iv[1] = 0x00;
for (i = 2; i < 8; i++)
mic_iv[i] = mpdu[i + 8]; /* mic_iv[2:7] = A2[0:5] = mpdu[10:15] */
for (i = 8; i < 14; i++)
mic_iv[i] = pn_vector[13 - i]; /* mic_iv[8:13] = PN[5:0] */
mic_iv[14] = (unsigned char) (payload_length / 256);
mic_iv[15] = (unsigned char) (payload_length % 256);
_func_exit_;
}
/************************************************/
/* construct_mic_header1() */
/* Builds the first MIC header block from */
/* header fields. */
/************************************************/
static void construct_mic_header1(u8 *mic_header1, int header_length, u8 *mpdu)
{
_func_enter_;
mic_header1[0] = (u8)((header_length - 2) / 256);
mic_header1[1] = (u8)((header_length - 2) % 256);
mic_header1[2] = mpdu[0] & 0xcf; /* Mute CF poll & CF ack bits */
mic_header1[3] = mpdu[1] & 0xc7; /* Mute retry, more data and pwr mgt bits */
mic_header1[4] = mpdu[4]; /* A1 */
mic_header1[5] = mpdu[5];
mic_header1[6] = mpdu[6];
mic_header1[7] = mpdu[7];
mic_header1[8] = mpdu[8];
mic_header1[9] = mpdu[9];
mic_header1[10] = mpdu[10]; /* A2 */
mic_header1[11] = mpdu[11];
mic_header1[12] = mpdu[12];
mic_header1[13] = mpdu[13];
mic_header1[14] = mpdu[14];
mic_header1[15] = mpdu[15];
_func_exit_;
}
/************************************************/
/* construct_mic_header2() */
/* Builds the last MIC header block from */
/* header fields. */
/************************************************/
static void construct_mic_header2(u8 *mic_header2, u8 *mpdu, int a4_exists, int qc_exists)
{
int i;
_func_enter_;
for (i = 0; i < 16; i++)
mic_header2[i] = 0x00;
mic_header2[0] = mpdu[16]; /* A3 */
mic_header2[1] = mpdu[17];
mic_header2[2] = mpdu[18];
mic_header2[3] = mpdu[19];
mic_header2[4] = mpdu[20];
mic_header2[5] = mpdu[21];
mic_header2[6] = 0x00;
mic_header2[7] = 0x00; /* mpdu[23]; */
if (!qc_exists && a4_exists) {
for (i = 0; i < 6; i++)
mic_header2[8+i] = mpdu[24+i]; /* A4 */
}
if (qc_exists && !a4_exists) {
mic_header2[8] = mpdu[24] & 0x0f; /* mute bits 15 - 4 */
mic_header2[9] = mpdu[25] & 0x00;
}
if (qc_exists && a4_exists) {
for (i = 0; i < 6; i++)
mic_header2[8+i] = mpdu[24+i]; /* A4 */
mic_header2[14] = mpdu[30] & 0x0f;
mic_header2[15] = mpdu[31] & 0x00;
}
_func_exit_;
}
/************************************************/
/* construct_mic_header2() */
/* Builds the last MIC header block from */
/* header fields. */
/************************************************/
static void construct_ctr_preload(u8 *ctr_preload, int a4_exists, int qc_exists, u8 *mpdu, u8 *pn_vector, int c)
{
int i;
_func_enter_;
for (i = 0; i < 16; i++)
ctr_preload[i] = 0x00;
i = 0;
ctr_preload[0] = 0x01; /* flag */
if (qc_exists && a4_exists)
ctr_preload[1] = mpdu[30] & 0x0f; /* QoC_Control */
if (qc_exists && !a4_exists)
ctr_preload[1] = mpdu[24] & 0x0f;
for (i = 2; i < 8; i++)
ctr_preload[i] = mpdu[i + 8]; /* ctr_preload[2:7] = A2[0:5] = mpdu[10:15] */
for (i = 8; i < 14; i++)
ctr_preload[i] = pn_vector[13 - i]; /* ctr_preload[8:13] = PN[5:0] */
ctr_preload[14] = (unsigned char) (c / 256); /* Ctr */
ctr_preload[15] = (unsigned char) (c % 256);
_func_exit_;
}
/************************************/
/* bitwise_xor() */
/* A 128 bit, bitwise exclusive or */
/************************************/
static void bitwise_xor(u8 *ina, u8 *inb, u8 *out)
{
int i;
_func_enter_;
for (i = 0; i < 16; i++)
out[i] = ina[i] ^ inb[i];
_func_exit_;
}
static int aes_cipher(u8 *key, uint hdrlen, u8 *pframe, uint plen)
{
uint qc_exists, a4_exists, i, j, payload_remainder,
num_blocks, payload_index;
u8 pn_vector[6];
u8 mic_iv[16];
u8 mic_header1[16];
u8 mic_header2[16];
u8 ctr_preload[16];
/* Intermediate Buffers */
u8 chain_buffer[16];
u8 aes_out[16];
u8 padded_buffer[16];
u8 mic[8];
uint frtype = GetFrameType(pframe);
uint frsubtype = GetFrameSubType(pframe);
_func_enter_;
frsubtype = frsubtype>>4;
_rtw_memset((void *)mic_iv, 0, 16);
_rtw_memset((void *)mic_header1, 0, 16);
_rtw_memset((void *)mic_header2, 0, 16);
_rtw_memset((void *)ctr_preload, 0, 16);
_rtw_memset((void *)chain_buffer, 0, 16);
_rtw_memset((void *)aes_out, 0, 16);
_rtw_memset((void *)padded_buffer, 0, 16);
if ((hdrlen == WLAN_HDR_A3_LEN) || (hdrlen == WLAN_HDR_A3_QOS_LEN))
a4_exists = 0;
else
a4_exists = 1;
if ((frtype == WIFI_DATA_CFACK) || (frtype == WIFI_DATA_CFPOLL) || (frtype == WIFI_DATA_CFACKPOLL)) {
qc_exists = 1;
if (hdrlen != WLAN_HDR_A3_QOS_LEN)
hdrlen += 2;
} else if ((frsubtype == 0x08) || (frsubtype == 0x09) || (frsubtype == 0x0a) || (frsubtype == 0x0b)) {
if (hdrlen != WLAN_HDR_A3_QOS_LEN)
hdrlen += 2;
qc_exists = 1;
} else {
qc_exists = 0;
}
pn_vector[0] = pframe[hdrlen];
pn_vector[1] = pframe[hdrlen+1];
pn_vector[2] = pframe[hdrlen+4];
pn_vector[3] = pframe[hdrlen+5];
pn_vector[4] = pframe[hdrlen+6];
pn_vector[5] = pframe[hdrlen+7];
construct_mic_iv(mic_iv, qc_exists, a4_exists, pframe, plen, pn_vector);
construct_mic_header1(mic_header1, hdrlen, pframe);
construct_mic_header2(mic_header2, pframe, a4_exists, qc_exists);
payload_remainder = plen % 16;
num_blocks = plen / 16;
/* Find start of payload */
payload_index = (hdrlen + 8);
/* Calculate MIC */
aes128k128d(key, mic_iv, aes_out);
bitwise_xor(aes_out, mic_header1, chain_buffer);
aes128k128d(key, chain_buffer, aes_out);
bitwise_xor(aes_out, mic_header2, chain_buffer);
aes128k128d(key, chain_buffer, aes_out);
for (i = 0; i < num_blocks; i++) {
bitwise_xor(aes_out, &pframe[payload_index], chain_buffer);/* bitwise_xor(aes_out, &message[payload_index], chain_buffer); */
payload_index += 16;
aes128k128d(key, chain_buffer, aes_out);
}
/* Add on the final payload block if it needs padding */
if (payload_remainder > 0) {
for (j = 0; j < 16; j++)
padded_buffer[j] = 0x00;
for (j = 0; j < payload_remainder; j++)
padded_buffer[j] = pframe[payload_index++];/* padded_buffer[j] = message[payload_index++]; */
bitwise_xor(aes_out, padded_buffer, chain_buffer);
aes128k128d(key, chain_buffer, aes_out);
}
for (j = 0; j < 8; j++)
mic[j] = aes_out[j];
/* Insert MIC into payload */
for (j = 0; j < 8; j++)
pframe[payload_index+j] = mic[j]; /* message[payload_index+j] = mic[j]; */
payload_index = hdrlen + 8;
for (i = 0; i < num_blocks; i++) {
construct_ctr_preload(ctr_preload, a4_exists, qc_exists, pframe, pn_vector, i+1);
aes128k128d(key, ctr_preload, aes_out);
bitwise_xor(aes_out, &pframe[payload_index], chain_buffer);
for (j = 0; j < 16; j++)
pframe[payload_index++] = chain_buffer[j];
}
if (payload_remainder > 0) { /* If there is a short final block, then pad it,*/
/* encrypt it and copy the unpadded part back */
construct_ctr_preload(ctr_preload, a4_exists, qc_exists, pframe, pn_vector, num_blocks+1);
for (j = 0; j < 16; j++)
padded_buffer[j] = 0x00;
for (j = 0; j < payload_remainder; j++)
padded_buffer[j] = pframe[payload_index+j];
aes128k128d(key, ctr_preload, aes_out);
bitwise_xor(aes_out, padded_buffer, chain_buffer);
for (j = 0; j < payload_remainder; j++)
pframe[payload_index++] = chain_buffer[j];
}
/* Encrypt the MIC */
construct_ctr_preload(ctr_preload, a4_exists, qc_exists, pframe, pn_vector, 0);
for (j = 0; j < 16; j++)
padded_buffer[j] = 0x00;
for (j = 0; j < 8; j++)
padded_buffer[j] = pframe[j+hdrlen+8+plen];
aes128k128d(key, ctr_preload, aes_out);
bitwise_xor(aes_out, padded_buffer, chain_buffer);
for (j = 0; j < 8; j++)
pframe[payload_index++] = chain_buffer[j];
_func_exit_;
return _SUCCESS;
}
u32 rtw_aes_encrypt(struct adapter *padapter, u8 *pxmitframe)
{ /* exclude ICV */
/*static*/
/* unsigned char message[MAX_MSG_SIZE]; */
/* Intermediate Buffers */
int curfragnum, length;
u8 *pframe, *prwskey; /* *payload,*iv */
u8 hw_hdr_offset = 0;
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;
/* uint offset = 0; */
u32 res = _SUCCESS;
_func_enter_;
if (((struct xmit_frame *)pxmitframe)->buf_addr == NULL)
return _FAIL;
hw_hdr_offset = TXDESC_SIZE +
(((struct xmit_frame *)pxmitframe)->pkt_offset * PACKET_OFFSET_SZ);
pframe = ((struct xmit_frame *)pxmitframe)->buf_addr + hw_hdr_offset;
/* 4 start to encrypt each fragment */
if ((pattrib->encrypt == _AES_)) {
if (pattrib->psta)
stainfo = pattrib->psta;
else
stainfo = rtw_get_stainfo(&padapter->stapriv, &pattrib->ra[0]);
if (stainfo != NULL) {
RT_TRACE(_module_rtl871x_security_c_, _drv_err_, ("rtw_aes_encrypt: stainfo!= NULL!!!\n"));
if (IS_MCAST(pattrib->ra))
prwskey = psecuritypriv->dot118021XGrpKey[psecuritypriv->dot118021XGrpKeyid].skey;
else
prwskey = &stainfo->dot118021x_UncstKey.skey[0];
for (curfragnum = 0; curfragnum < pattrib->nr_frags; curfragnum++) {
if ((curfragnum+1) == pattrib->nr_frags) { /* 4 the last fragment */
length = pattrib->last_txcmdsz-pattrib->hdrlen-pattrib->iv_len-pattrib->icv_len;
aes_cipher(prwskey, pattrib->hdrlen, pframe, length);
} else{
length = pxmitpriv->frag_len-pattrib->hdrlen-pattrib->iv_len-pattrib->icv_len ;
aes_cipher(prwskey, pattrib->hdrlen, pframe, length);
pframe += pxmitpriv->frag_len;
pframe = (u8 *)RND4((size_t)(pframe));
}
}
} else{
RT_TRACE(_module_rtl871x_security_c_, _drv_err_, ("rtw_aes_encrypt: stainfo==NULL!!!\n"));
res = _FAIL;
}
}
_func_exit_;
return res;
}
static int aes_decipher(u8 *key, uint hdrlen,
u8 *pframe, uint plen)
{
static u8 message[MAX_MSG_SIZE];
uint qc_exists, a4_exists, i, j, payload_remainder,
num_blocks, payload_index;
int res = _SUCCESS;
u8 pn_vector[6];
u8 mic_iv[16];
u8 mic_header1[16];
u8 mic_header2[16];
u8 ctr_preload[16];
/* Intermediate Buffers */
u8 chain_buffer[16];
u8 aes_out[16];
u8 padded_buffer[16];
u8 mic[8];
/* uint offset = 0; */
uint frtype = GetFrameType(pframe);
uint frsubtype = GetFrameSubType(pframe);
_func_enter_;
frsubtype = frsubtype>>4;
_rtw_memset((void *)mic_iv, 0, 16);
_rtw_memset((void *)mic_header1, 0, 16);
_rtw_memset((void *)mic_header2, 0, 16);
_rtw_memset((void *)ctr_preload, 0, 16);
_rtw_memset((void *)chain_buffer, 0, 16);
_rtw_memset((void *)aes_out, 0, 16);
_rtw_memset((void *)padded_buffer, 0, 16);
/* start to decrypt the payload */
num_blocks = (plen-8) / 16; /* plen including llc, payload_length and mic) */
payload_remainder = (plen-8) % 16;
pn_vector[0] = pframe[hdrlen];
pn_vector[1] = pframe[hdrlen+1];
pn_vector[2] = pframe[hdrlen+4];
pn_vector[3] = pframe[hdrlen+5];
pn_vector[4] = pframe[hdrlen+6];
pn_vector[5] = pframe[hdrlen+7];
if ((hdrlen == WLAN_HDR_A3_LEN) || (hdrlen == WLAN_HDR_A3_QOS_LEN))
a4_exists = 0;
else
a4_exists = 1;
if ((frtype == WIFI_DATA_CFACK) || (frtype == WIFI_DATA_CFPOLL) ||
(frtype == WIFI_DATA_CFACKPOLL)) {
qc_exists = 1;
if (hdrlen != WLAN_HDR_A3_QOS_LEN)
hdrlen += 2;
} else if ((frsubtype == 0x08) || (frsubtype == 0x09) ||
(frsubtype == 0x0a) || (frsubtype == 0x0b)) {
if (hdrlen != WLAN_HDR_A3_QOS_LEN)
hdrlen += 2;
qc_exists = 1;
} else {
qc_exists = 0;
}
/* now, decrypt pframe with hdrlen offset and plen long */
payload_index = hdrlen + 8; /* 8 is for extiv */
for (i = 0; i < num_blocks; i++) {
construct_ctr_preload(ctr_preload, a4_exists, qc_exists, pframe, pn_vector, i+1);
aes128k128d(key, ctr_preload, aes_out);
bitwise_xor(aes_out, &pframe[payload_index], chain_buffer);
for (j = 0; j < 16; j++)
pframe[payload_index++] = chain_buffer[j];
}
if (payload_remainder > 0) { /* If there is a short final block, then pad it,*/
/* encrypt it and copy the unpadded part back */
construct_ctr_preload(ctr_preload, a4_exists, qc_exists, pframe, pn_vector, num_blocks+1);
for (j = 0; j < 16; j++)
padded_buffer[j] = 0x00;
for (j = 0; j < payload_remainder; j++)
padded_buffer[j] = pframe[payload_index+j];
aes128k128d(key, ctr_preload, aes_out);
bitwise_xor(aes_out, padded_buffer, chain_buffer);
for (j = 0; j < payload_remainder; j++)
pframe[payload_index++] = chain_buffer[j];
}
/* start to calculate the mic */
if ((hdrlen+plen+8) <= MAX_MSG_SIZE)
memcpy(message, pframe, (hdrlen + plen+8)); /* 8 is for ext iv len */
pn_vector[0] = pframe[hdrlen];
pn_vector[1] = pframe[hdrlen+1];
pn_vector[2] = pframe[hdrlen+4];
pn_vector[3] = pframe[hdrlen+5];
pn_vector[4] = pframe[hdrlen+6];
pn_vector[5] = pframe[hdrlen+7];
construct_mic_iv(mic_iv, qc_exists, a4_exists, message, plen-8, pn_vector);
construct_mic_header1(mic_header1, hdrlen, message);
construct_mic_header2(mic_header2, message, a4_exists, qc_exists);
payload_remainder = (plen-8) % 16;
num_blocks = (plen-8) / 16;
/* Find start of payload */
payload_index = (hdrlen + 8);
/* Calculate MIC */
aes128k128d(key, mic_iv, aes_out);
bitwise_xor(aes_out, mic_header1, chain_buffer);
aes128k128d(key, chain_buffer, aes_out);
bitwise_xor(aes_out, mic_header2, chain_buffer);
aes128k128d(key, chain_buffer, aes_out);
for (i = 0; i < num_blocks; i++) {
bitwise_xor(aes_out, &message[payload_index], chain_buffer);
payload_index += 16;
aes128k128d(key, chain_buffer, aes_out);
}
/* Add on the final payload block if it needs padding */
if (payload_remainder > 0) {
for (j = 0; j < 16; j++)
padded_buffer[j] = 0x00;
for (j = 0; j < payload_remainder; j++)
padded_buffer[j] = message[payload_index++];
bitwise_xor(aes_out, padded_buffer, chain_buffer);
aes128k128d(key, chain_buffer, aes_out);
}
for (j = 0 ; j < 8; j++)
mic[j] = aes_out[j];
/* Insert MIC into payload */
for (j = 0; j < 8; j++)
message[payload_index+j] = mic[j];
payload_index = hdrlen + 8;
for (i = 0; i < num_blocks; i++) {
construct_ctr_preload(ctr_preload, a4_exists, qc_exists, message, pn_vector, i+1);
aes128k128d(key, ctr_preload, aes_out);
bitwise_xor(aes_out, &message[payload_index], chain_buffer);
for (j = 0; j < 16; j++)
message[payload_index++] = chain_buffer[j];
}
if (payload_remainder > 0) { /* If there is a short final block, then pad it,*/
/* encrypt it and copy the unpadded part back */
construct_ctr_preload(ctr_preload, a4_exists, qc_exists, message, pn_vector, num_blocks+1);
for (j = 0; j < 16; j++)
padded_buffer[j] = 0x00;
for (j = 0; j < payload_remainder; j++)
padded_buffer[j] = message[payload_index+j];
aes128k128d(key, ctr_preload, aes_out);
bitwise_xor(aes_out, padded_buffer, chain_buffer);
for (j = 0; j < payload_remainder; j++)
message[payload_index++] = chain_buffer[j];
}
/* Encrypt the MIC */
construct_ctr_preload(ctr_preload, a4_exists, qc_exists, message, pn_vector, 0);
for (j = 0; j < 16; j++)
padded_buffer[j] = 0x00;
for (j = 0; j < 8; j++)
padded_buffer[j] = message[j+hdrlen+8+plen-8];
aes128k128d(key, ctr_preload, aes_out);
bitwise_xor(aes_out, padded_buffer, chain_buffer);
for (j = 0; j < 8; j++)
message[payload_index++] = chain_buffer[j];
/* compare the mic */
for (i = 0; i < 8; i++) {
if (pframe[hdrlen+8+plen-8+i] != message[hdrlen+8+plen-8+i]) {
RT_TRACE(_module_rtl871x_security_c_, _drv_err_,
("aes_decipher:mic check error mic[%d]: pframe(%x)!=message(%x)\n",
i, pframe[hdrlen+8+plen-8+i], message[hdrlen+8+plen-8+i]));
DBG_88E("aes_decipher:mic check error mic[%d]: pframe(%x)!=message(%x)\n",
i, pframe[hdrlen+8+plen-8+i], message[hdrlen+8+plen-8+i]);
res = _FAIL;
}
}
_func_exit_;
return res;
}
u32 rtw_aes_decrypt(struct adapter *padapter, u8 *precvframe)
{ /* exclude ICV */
/* Intermediate Buffers */
int length;
u8 *pframe, *prwskey; /* *payload,*iv */
struct sta_info *stainfo;
struct rx_pkt_attrib *prxattrib = &((union recv_frame *)precvframe)->u.hdr.attrib;
struct security_priv *psecuritypriv = &padapter->securitypriv;
u32 res = _SUCCESS;
_func_enter_;
pframe = (unsigned char *)((union recv_frame *)precvframe)->u.hdr.rx_data;
/* 4 start to encrypt each fragment */
if ((prxattrib->encrypt == _AES_)) {
stainfo = rtw_get_stainfo(&padapter->stapriv, &prxattrib->ta[0]);
if (stainfo != NULL) {
RT_TRACE(_module_rtl871x_security_c_, _drv_err_, ("rtw_aes_decrypt: stainfo!= NULL!!!\n"));
if (IS_MCAST(prxattrib->ra)) {
/* in concurrent we should use sw descrypt in group key, so we remove this message */
if (!psecuritypriv->binstallGrpkey) {
res = _FAIL;
DBG_88E("%s:rx bc/mc packets, but didn't install group key!!!!!!!!!!\n", __func__);
goto exit;
}
prwskey = psecuritypriv->dot118021XGrpKey[prxattrib->key_index].skey;
if (psecuritypriv->dot118021XGrpKeyid != prxattrib->key_index) {
DBG_88E("not match packet_index=%d, install_index=%d\n",
prxattrib->key_index, psecuritypriv->dot118021XGrpKeyid);
res = _FAIL;
goto exit;
}
} else {
prwskey = &stainfo->dot118021x_UncstKey.skey[0];
}
length = ((union recv_frame *)precvframe)->u.hdr.len-prxattrib->hdrlen-prxattrib->iv_len;
res = aes_decipher(prwskey, prxattrib->hdrlen, pframe, length);
} else {
RT_TRACE(_module_rtl871x_security_c_, _drv_err_, ("rtw_aes_encrypt: stainfo==NULL!!!\n"));
res = _FAIL;
}
}
_func_exit_;
exit:
return res;
}
/* AES tables*/
const u32 Te0[256] = {
0xc66363a5U, 0xf87c7c84U, 0xee777799U, 0xf67b7b8dU,
0xfff2f20dU, 0xd66b6bbdU, 0xde6f6fb1U, 0x91c5c554U,
0x60303050U, 0x02010103U, 0xce6767a9U, 0x562b2b7dU,
0xe7fefe19U, 0xb5d7d762U, 0x4dababe6U, 0xec76769aU,
0x8fcaca45U, 0x1f82829dU, 0x89c9c940U, 0xfa7d7d87U,
0xeffafa15U, 0xb25959ebU, 0x8e4747c9U, 0xfbf0f00bU,
0x41adadecU, 0xb3d4d467U, 0x5fa2a2fdU, 0x45afafeaU,
0x239c9cbfU, 0x53a4a4f7U, 0xe4727296U, 0x9bc0c05bU,
0x75b7b7c2U, 0xe1fdfd1cU, 0x3d9393aeU, 0x4c26266aU,
0x6c36365aU, 0x7e3f3f41U, 0xf5f7f702U, 0x83cccc4fU,
0x6834345cU, 0x51a5a5f4U, 0xd1e5e534U, 0xf9f1f108U,
0xe2717193U, 0xabd8d873U, 0x62313153U, 0x2a15153fU,
0x0804040cU, 0x95c7c752U, 0x46232365U, 0x9dc3c35eU,
0x30181828U, 0x379696a1U, 0x0a05050fU, 0x2f9a9ab5U,
0x0e070709U, 0x24121236U, 0x1b80809bU, 0xdfe2e23dU,
0xcdebeb26U, 0x4e272769U, 0x7fb2b2cdU, 0xea75759fU,
0x1209091bU, 0x1d83839eU, 0x582c2c74U, 0x341a1a2eU,
0x361b1b2dU, 0xdc6e6eb2U, 0xb45a5aeeU, 0x5ba0a0fbU,
0xa45252f6U, 0x763b3b4dU, 0xb7d6d661U, 0x7db3b3ceU,
0x5229297bU, 0xdde3e33eU, 0x5e2f2f71U, 0x13848497U,
0xa65353f5U, 0xb9d1d168U, 0x00000000U, 0xc1eded2cU,
0x40202060U, 0xe3fcfc1fU, 0x79b1b1c8U, 0xb65b5bedU,
0xd46a6abeU, 0x8dcbcb46U, 0x67bebed9U, 0x7239394bU,
0x944a4adeU, 0x984c4cd4U, 0xb05858e8U, 0x85cfcf4aU,
0xbbd0d06bU, 0xc5efef2aU, 0x4faaaae5U, 0xedfbfb16U,
0x864343c5U, 0x9a4d4dd7U, 0x66333355U, 0x11858594U,
0x8a4545cfU, 0xe9f9f910U, 0x04020206U, 0xfe7f7f81U,
0xa05050f0U, 0x783c3c44U, 0x259f9fbaU, 0x4ba8a8e3U,
0xa25151f3U, 0x5da3a3feU, 0x804040c0U, 0x058f8f8aU,
0x3f9292adU, 0x219d9dbcU, 0x70383848U, 0xf1f5f504U,
0x63bcbcdfU, 0x77b6b6c1U, 0xafdada75U, 0x42212163U,
0x20101030U, 0xe5ffff1aU, 0xfdf3f30eU, 0xbfd2d26dU,
0x81cdcd4cU, 0x180c0c14U, 0x26131335U, 0xc3ecec2fU,
0xbe5f5fe1U, 0x359797a2U, 0x884444ccU, 0x2e171739U,
0x93c4c457U, 0x55a7a7f2U, 0xfc7e7e82U, 0x7a3d3d47U,
0xc86464acU, 0xba5d5de7U, 0x3219192bU, 0xe6737395U,
0xc06060a0U, 0x19818198U, 0x9e4f4fd1U, 0xa3dcdc7fU,
0x44222266U, 0x542a2a7eU, 0x3b9090abU, 0x0b888883U,
0x8c4646caU, 0xc7eeee29U, 0x6bb8b8d3U, 0x2814143cU,
0xa7dede79U, 0xbc5e5ee2U, 0x160b0b1dU, 0xaddbdb76U,
0xdbe0e03bU, 0x64323256U, 0x743a3a4eU, 0x140a0a1eU,
0x924949dbU, 0x0c06060aU, 0x4824246cU, 0xb85c5ce4U,
0x9fc2c25dU, 0xbdd3d36eU, 0x43acacefU, 0xc46262a6U,
0x399191a8U, 0x319595a4U, 0xd3e4e437U, 0xf279798bU,
0xd5e7e732U, 0x8bc8c843U, 0x6e373759U, 0xda6d6db7U,
0x018d8d8cU, 0xb1d5d564U, 0x9c4e4ed2U, 0x49a9a9e0U,
0xd86c6cb4U, 0xac5656faU, 0xf3f4f407U, 0xcfeaea25U,
0xca6565afU, 0xf47a7a8eU, 0x47aeaee9U, 0x10080818U,
0x6fbabad5U, 0xf0787888U, 0x4a25256fU, 0x5c2e2e72U,
0x381c1c24U, 0x57a6a6f1U, 0x73b4b4c7U, 0x97c6c651U,
0xcbe8e823U, 0xa1dddd7cU, 0xe874749cU, 0x3e1f1f21U,
0x964b4bddU, 0x61bdbddcU, 0x0d8b8b86U, 0x0f8a8a85U,
0xe0707090U, 0x7c3e3e42U, 0x71b5b5c4U, 0xcc6666aaU,
0x904848d8U, 0x06030305U, 0xf7f6f601U, 0x1c0e0e12U,
0xc26161a3U, 0x6a35355fU, 0xae5757f9U, 0x69b9b9d0U,
0x17868691U, 0x99c1c158U, 0x3a1d1d27U, 0x279e9eb9U,
0xd9e1e138U, 0xebf8f813U, 0x2b9898b3U, 0x22111133U,
0xd26969bbU, 0xa9d9d970U, 0x078e8e89U, 0x339494a7U,
0x2d9b9bb6U, 0x3c1e1e22U, 0x15878792U, 0xc9e9e920U,
0x87cece49U, 0xaa5555ffU, 0x50282878U, 0xa5dfdf7aU,
0x038c8c8fU, 0x59a1a1f8U, 0x09898980U, 0x1a0d0d17U,
0x65bfbfdaU, 0xd7e6e631U, 0x844242c6U, 0xd06868b8U,
0x824141c3U, 0x299999b0U, 0x5a2d2d77U, 0x1e0f0f11U,
0x7bb0b0cbU, 0xa85454fcU, 0x6dbbbbd6U, 0x2c16163aU,
};
const u32 Td0[256] = {
0x51f4a750U, 0x7e416553U, 0x1a17a4c3U, 0x3a275e96U,
0x3bab6bcbU, 0x1f9d45f1U, 0xacfa58abU, 0x4be30393U,
0x2030fa55U, 0xad766df6U, 0x88cc7691U, 0xf5024c25U,
0x4fe5d7fcU, 0xc52acbd7U, 0x26354480U, 0xb562a38fU,
0xdeb15a49U, 0x25ba1b67U, 0x45ea0e98U, 0x5dfec0e1U,
0xc32f7502U, 0x814cf012U, 0x8d4697a3U, 0x6bd3f9c6U,
0x038f5fe7U, 0x15929c95U, 0xbf6d7aebU, 0x955259daU,
0xd4be832dU, 0x587421d3U, 0x49e06929U, 0x8ec9c844U,
0x75c2896aU, 0xf48e7978U, 0x99583e6bU, 0x27b971ddU,
0xbee14fb6U, 0xf088ad17U, 0xc920ac66U, 0x7dce3ab4U,
0x63df4a18U, 0xe51a3182U, 0x97513360U, 0x62537f45U,
0xb16477e0U, 0xbb6bae84U, 0xfe81a01cU, 0xf9082b94U,
0x70486858U, 0x8f45fd19U, 0x94de6c87U, 0x527bf8b7U,
0xab73d323U, 0x724b02e2U, 0xe31f8f57U, 0x6655ab2aU,
0xb2eb2807U, 0x2fb5c203U, 0x86c57b9aU, 0xd33708a5U,
0x302887f2U, 0x23bfa5b2U, 0x02036abaU, 0xed16825cU,
0x8acf1c2bU, 0xa779b492U, 0xf307f2f0U, 0x4e69e2a1U,
0x65daf4cdU, 0x0605bed5U, 0xd134621fU, 0xc4a6fe8aU,
0x342e539dU, 0xa2f355a0U, 0x058ae132U, 0xa4f6eb75U,
0x0b83ec39U, 0x4060efaaU, 0x5e719f06U, 0xbd6e1051U,
0x3e218af9U, 0x96dd063dU, 0xdd3e05aeU, 0x4de6bd46U,
0x91548db5U, 0x71c45d05U, 0x0406d46fU, 0x605015ffU,
0x1998fb24U, 0xd6bde997U, 0x894043ccU, 0x67d99e77U,
0xb0e842bdU, 0x07898b88U, 0xe7195b38U, 0x79c8eedbU,
0xa17c0a47U, 0x7c420fe9U, 0xf8841ec9U, 0x00000000U,
0x09808683U, 0x322bed48U, 0x1e1170acU, 0x6c5a724eU,
0xfd0efffbU, 0x0f853856U, 0x3daed51eU, 0x362d3927U,
0x0a0fd964U, 0x685ca621U, 0x9b5b54d1U, 0x24362e3aU,
0x0c0a67b1U, 0x9357e70fU, 0xb4ee96d2U, 0x1b9b919eU,
0x80c0c54fU, 0x61dc20a2U, 0x5a774b69U, 0x1c121a16U,
0xe293ba0aU, 0xc0a02ae5U, 0x3c22e043U, 0x121b171dU,
0x0e090d0bU, 0xf28bc7adU, 0x2db6a8b9U, 0x141ea9c8U,
0x57f11985U, 0xaf75074cU, 0xee99ddbbU, 0xa37f60fdU,
0xf701269fU, 0x5c72f5bcU, 0x44663bc5U, 0x5bfb7e34U,
0x8b432976U, 0xcb23c6dcU, 0xb6edfc68U, 0xb8e4f163U,
0xd731dccaU, 0x42638510U, 0x13972240U, 0x84c61120U,
0x854a247dU, 0xd2bb3df8U, 0xaef93211U, 0xc729a16dU,
0x1d9e2f4bU, 0xdcb230f3U, 0x0d8652ecU, 0x77c1e3d0U,
0x2bb3166cU, 0xa970b999U, 0x119448faU, 0x47e96422U,
0xa8fc8cc4U, 0xa0f03f1aU, 0x567d2cd8U, 0x223390efU,
0x87494ec7U, 0xd938d1c1U, 0x8ccaa2feU, 0x98d40b36U,
0xa6f581cfU, 0xa57ade28U, 0xdab78e26U, 0x3fadbfa4U,
0x2c3a9de4U, 0x5078920dU, 0x6a5fcc9bU, 0x547e4662U,
0xf68d13c2U, 0x90d8b8e8U, 0x2e39f75eU, 0x82c3aff5U,
0x9f5d80beU, 0x69d0937cU, 0x6fd52da9U, 0xcf2512b3U,
0xc8ac993bU, 0x10187da7U, 0xe89c636eU, 0xdb3bbb7bU,
0xcd267809U, 0x6e5918f4U, 0xec9ab701U, 0x834f9aa8U,
0xe6956e65U, 0xaaffe67eU, 0x21bccf08U, 0xef15e8e6U,
0xbae79bd9U, 0x4a6f36ceU, 0xea9f09d4U, 0x29b07cd6U,
0x31a4b2afU, 0x2a3f2331U, 0xc6a59430U, 0x35a266c0U,
0x744ebc37U, 0xfc82caa6U, 0xe090d0b0U, 0x33a7d815U,
0xf104984aU, 0x41ecdaf7U, 0x7fcd500eU, 0x1791f62fU,
0x764dd68dU, 0x43efb04dU, 0xccaa4d54U, 0xe49604dfU,
0x9ed1b5e3U, 0x4c6a881bU, 0xc12c1fb8U, 0x4665517fU,
0x9d5eea04U, 0x018c355dU, 0xfa877473U, 0xfb0b412eU,
0xb3671d5aU, 0x92dbd252U, 0xe9105633U, 0x6dd64713U,
0x9ad7618cU, 0x37a10c7aU, 0x59f8148eU, 0xeb133c89U,
0xcea927eeU, 0xb761c935U, 0xe11ce5edU, 0x7a47b13cU,
0x9cd2df59U, 0x55f2733fU, 0x1814ce79U, 0x73c737bfU,
0x53f7cdeaU, 0x5ffdaa5bU, 0xdf3d6f14U, 0x7844db86U,
0xcaaff381U, 0xb968c43eU, 0x3824342cU, 0xc2a3405fU,
0x161dc372U, 0xbce2250cU, 0x283c498bU, 0xff0d9541U,
0x39a80171U, 0x080cb3deU, 0xd8b4e49cU, 0x6456c190U,
0x7bcb8461U, 0xd532b670U, 0x486c5c74U, 0xd0b85742U,
};
const u8 Td4s[256] = {
0x52U, 0x09U, 0x6aU, 0xd5U, 0x30U, 0x36U, 0xa5U, 0x38U,
0xbfU, 0x40U, 0xa3U, 0x9eU, 0x81U, 0xf3U, 0xd7U, 0xfbU,
0x7cU, 0xe3U, 0x39U, 0x82U, 0x9bU, 0x2fU, 0xffU, 0x87U,
0x34U, 0x8eU, 0x43U, 0x44U, 0xc4U, 0xdeU, 0xe9U, 0xcbU,
0x54U, 0x7bU, 0x94U, 0x32U, 0xa6U, 0xc2U, 0x23U, 0x3dU,
0xeeU, 0x4cU, 0x95U, 0x0bU, 0x42U, 0xfaU, 0xc3U, 0x4eU,
0x08U, 0x2eU, 0xa1U, 0x66U, 0x28U, 0xd9U, 0x24U, 0xb2U,
0x76U, 0x5bU, 0xa2U, 0x49U, 0x6dU, 0x8bU, 0xd1U, 0x25U,
0x72U, 0xf8U, 0xf6U, 0x64U, 0x86U, 0x68U, 0x98U, 0x16U,
0xd4U, 0xa4U, 0x5cU, 0xccU, 0x5dU, 0x65U, 0xb6U, 0x92U,
0x6cU, 0x70U, 0x48U, 0x50U, 0xfdU, 0xedU, 0xb9U, 0xdaU,
0x5eU, 0x15U, 0x46U, 0x57U, 0xa7U, 0x8dU, 0x9dU, 0x84U,
0x90U, 0xd8U, 0xabU, 0x00U, 0x8cU, 0xbcU, 0xd3U, 0x0aU,
0xf7U, 0xe4U, 0x58U, 0x05U, 0xb8U, 0xb3U, 0x45U, 0x06U,
0xd0U, 0x2cU, 0x1eU, 0x8fU, 0xcaU, 0x3fU, 0x0fU, 0x02U,
0xc1U, 0xafU, 0xbdU, 0x03U, 0x01U, 0x13U, 0x8aU, 0x6bU,
0x3aU, 0x91U, 0x11U, 0x41U, 0x4fU, 0x67U, 0xdcU, 0xeaU,
0x97U, 0xf2U, 0xcfU, 0xceU, 0xf0U, 0xb4U, 0xe6U, 0x73U,
0x96U, 0xacU, 0x74U, 0x22U, 0xe7U, 0xadU, 0x35U, 0x85U,
0xe2U, 0xf9U, 0x37U, 0xe8U, 0x1cU, 0x75U, 0xdfU, 0x6eU,
0x47U, 0xf1U, 0x1aU, 0x71U, 0x1dU, 0x29U, 0xc5U, 0x89U,
0x6fU, 0xb7U, 0x62U, 0x0eU, 0xaaU, 0x18U, 0xbeU, 0x1bU,
0xfcU, 0x56U, 0x3eU, 0x4bU, 0xc6U, 0xd2U, 0x79U, 0x20U,
0x9aU, 0xdbU, 0xc0U, 0xfeU, 0x78U, 0xcdU, 0x5aU, 0xf4U,
0x1fU, 0xddU, 0xa8U, 0x33U, 0x88U, 0x07U, 0xc7U, 0x31U,
0xb1U, 0x12U, 0x10U, 0x59U, 0x27U, 0x80U, 0xecU, 0x5fU,
0x60U, 0x51U, 0x7fU, 0xa9U, 0x19U, 0xb5U, 0x4aU, 0x0dU,
0x2dU, 0xe5U, 0x7aU, 0x9fU, 0x93U, 0xc9U, 0x9cU, 0xefU,
0xa0U, 0xe0U, 0x3bU, 0x4dU, 0xaeU, 0x2aU, 0xf5U, 0xb0U,
0xc8U, 0xebU, 0xbbU, 0x3cU, 0x83U, 0x53U, 0x99U, 0x61U,
0x17U, 0x2bU, 0x04U, 0x7eU, 0xbaU, 0x77U, 0xd6U, 0x26U,
0xe1U, 0x69U, 0x14U, 0x63U, 0x55U, 0x21U, 0x0cU, 0x7dU,
};
const u8 rcons[] = {
0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1B, 0x36
/* for 128-bit blocks, Rijndael never uses more than 10 rcon values */
};
/**
* Expand the cipher key into the encryption key schedule.
*
* @return the number of rounds for the given cipher key size.
*/
#define ROUND(i, d, s) \
do { \
d##0 = TE0(s##0) ^ TE1(s##1) ^ TE2(s##2) ^ TE3(s##3) ^ rk[4 * i]; \
d##1 = TE0(s##1) ^ TE1(s##2) ^ TE2(s##3) ^ TE3(s##0) ^ rk[4 * i + 1]; \
d##2 = TE0(s##2) ^ TE1(s##3) ^ TE2(s##0) ^ TE3(s##1) ^ rk[4 * i + 2]; \
d##3 = TE0(s##3) ^ TE1(s##0) ^ TE2(s##1) ^ TE3(s##2) ^ rk[4 * i + 3]; \
} while (0);
/**
* omac1_aes_128 - One-Key CBC MAC (OMAC1) hash with AES-128 (aka AES-CMAC)
* @key: 128-bit key for the hash operation
* @data: Data buffer for which a MAC is determined
* @data_len: Length of data buffer in bytes
* @mac: Buffer for MAC (128 bits, i.e., 16 bytes)
* Returns: 0 on success, -1 on failure
*
* This is a mode for using block cipher (AES in this case) for authentication.
* OMAC1 was standardized with the name CMAC by NIST in a Special Publication
* (SP) 800-38B.
*/
void rtw_use_tkipkey_handler(void *FunctionContext)
{
struct adapter *padapter = (struct adapter *)FunctionContext;
_func_enter_;
RT_TRACE(_module_rtl871x_security_c_, _drv_err_, ("^^^rtw_use_tkipkey_handler ^^^\n"));
padapter->securitypriv.busetkipkey = true;
RT_TRACE(_module_rtl871x_security_c_, _drv_err_, ("^^^rtw_use_tkipkey_handler padapter->securitypriv.busetkipkey=%d^^^\n", padapter->securitypriv.busetkipkey));
_func_exit_;
}
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