diff options
Diffstat (limited to 'drivers/staging/rtl8712/rtl871x_security.c')
-rw-r--r-- | drivers/staging/rtl8712/rtl871x_security.c | 1389 |
1 files changed, 1389 insertions, 0 deletions
diff --git a/drivers/staging/rtl8712/rtl871x_security.c b/drivers/staging/rtl8712/rtl871x_security.c new file mode 100644 index 00000000000..65321bed4d5 --- /dev/null +++ b/drivers/staging/rtl8712/rtl871x_security.c | |||
@@ -0,0 +1,1389 @@ | |||
1 | /****************************************************************************** | ||
2 | * rtl871x_security.c | ||
3 | * | ||
4 | * Copyright(c) 2007 - 2010 Realtek Corporation. All rights reserved. | ||
5 | * Linux device driver for RTL8192SU | ||
6 | * | ||
7 | * This program is free software; you can redistribute it and/or modify it | ||
8 | * under the terms of version 2 of the GNU General Public License as | ||
9 | * published by the Free Software Foundation. | ||
10 | * | ||
11 | * This program is distributed in the hope that it will be useful, but WITHOUT | ||
12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | ||
13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | ||
14 | * more details. | ||
15 | * | ||
16 | * You should have received a copy of the GNU General Public License along with | ||
17 | * this program; if not, write to the Free Software Foundation, Inc., | ||
18 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA | ||
19 | * | ||
20 | * Modifications for inclusion into the Linux staging tree are | ||
21 | * Copyright(c) 2010 Larry Finger. All rights reserved. | ||
22 | * | ||
23 | * Contact information: | ||
24 | * WLAN FAE <wlanfae@realtek.com> | ||
25 | * Larry Finger <Larry.Finger@lwfinger.net> | ||
26 | * | ||
27 | ******************************************************************************/ | ||
28 | |||
29 | #define _RTL871X_SECURITY_C_ | ||
30 | |||
31 | #include "osdep_service.h" | ||
32 | #include "drv_types.h" | ||
33 | #include "wifi.h" | ||
34 | #include "osdep_intf.h" | ||
35 | |||
36 | /* =====WEP related===== */ | ||
37 | |||
38 | #define CRC32_POLY 0x04c11db7 | ||
39 | |||
40 | struct arc4context { | ||
41 | u32 x; | ||
42 | u32 y; | ||
43 | u8 state[256]; | ||
44 | }; | ||
45 | |||
46 | static void arcfour_init(struct arc4context *parc4ctx, u8 * key, u32 key_len) | ||
47 | { | ||
48 | u32 t, u; | ||
49 | u32 keyindex; | ||
50 | u32 stateindex; | ||
51 | u8 *state; | ||
52 | u32 counter; | ||
53 | |||
54 | state = parc4ctx->state; | ||
55 | parc4ctx->x = 0; | ||
56 | parc4ctx->y = 0; | ||
57 | for (counter = 0; counter < 256; counter++) | ||
58 | state[counter] = (u8)counter; | ||
59 | keyindex = 0; | ||
60 | stateindex = 0; | ||
61 | for (counter = 0; counter < 256; counter++) { | ||
62 | t = state[counter]; | ||
63 | stateindex = (stateindex + key[keyindex] + t) & 0xff; | ||
64 | u = state[stateindex]; | ||
65 | state[stateindex] = (u8)t; | ||
66 | state[counter] = (u8)u; | ||
67 | if (++keyindex >= key_len) | ||
68 | keyindex = 0; | ||
69 | } | ||
70 | } | ||
71 | |||
72 | static u32 arcfour_byte(struct arc4context *parc4ctx) | ||
73 | { | ||
74 | u32 x; | ||
75 | u32 y; | ||
76 | u32 sx, sy; | ||
77 | u8 *state; | ||
78 | |||
79 | state = parc4ctx->state; | ||
80 | x = (parc4ctx->x + 1) & 0xff; | ||
81 | sx = state[x]; | ||
82 | y = (sx + parc4ctx->y) & 0xff; | ||
83 | sy = state[y]; | ||
84 | parc4ctx->x = x; | ||
85 | parc4ctx->y = y; | ||
86 | state[y] = (u8)sx; | ||
87 | state[x] = (u8)sy; | ||
88 | return state[(sx + sy) & 0xff]; | ||
89 | } | ||
90 | |||
91 | static void arcfour_encrypt(struct arc4context *parc4ctx, | ||
92 | u8 *dest, u8 *src, u32 len) | ||
93 | { | ||
94 | u32 i; | ||
95 | |||
96 | for (i = 0; i < len; i++) | ||
97 | dest[i] = src[i] ^ (unsigned char)arcfour_byte(parc4ctx); | ||
98 | } | ||
99 | |||
100 | static sint bcrc32initialized; | ||
101 | static u32 crc32_table[256]; | ||
102 | |||
103 | static u8 crc32_reverseBit(u8 data) | ||
104 | { | ||
105 | return ((u8)(data << 7) & 0x80) | ((data << 5) & 0x40) | ((data << 3) | ||
106 | & 0x20) | ((data << 1) & 0x10) | ((data >> 1) & 0x08) | | ||
107 | ((data >> 3) & 0x04) | ((data >> 5) & 0x02) | ((data >> 7) & | ||
108 | 0x01); | ||
109 | } | ||
110 | |||
111 | static void crc32_init(void) | ||
112 | { | ||
113 | if (bcrc32initialized == 1) | ||
114 | return; | ||
115 | else { | ||
116 | sint i, j; | ||
117 | u32 c; | ||
118 | u8 *p = (u8 *)&c, *p1; | ||
119 | u8 k; | ||
120 | |||
121 | c = 0x12340000; | ||
122 | for (i = 0; i < 256; ++i) { | ||
123 | k = crc32_reverseBit((u8)i); | ||
124 | for (c = ((u32)k) << 24, j = 8; j > 0; --j) | ||
125 | c = c & 0x80000000 ? (c << 1) ^ CRC32_POLY : | ||
126 | (c << 1); | ||
127 | p1 = (u8 *)&crc32_table[i]; | ||
128 | p1[0] = crc32_reverseBit(p[3]); | ||
129 | p1[1] = crc32_reverseBit(p[2]); | ||
130 | p1[2] = crc32_reverseBit(p[1]); | ||
131 | p1[3] = crc32_reverseBit(p[0]); | ||
132 | } | ||
133 | bcrc32initialized = 1; | ||
134 | } | ||
135 | } | ||
136 | |||
137 | static u32 getcrc32(u8 *buf, u32 len) | ||
138 | { | ||
139 | u8 *p; | ||
140 | u32 crc; | ||
141 | |||
142 | if (bcrc32initialized == 0) | ||
143 | crc32_init(); | ||
144 | crc = 0xffffffff; /* preload shift register, per CRC-32 spec */ | ||
145 | for (p = buf; len > 0; ++p, --len) | ||
146 | crc = crc32_table[(crc ^ *p) & 0xff] ^ (crc >> 8); | ||
147 | return ~crc; /* transmit complement, per CRC-32 spec */ | ||
148 | } | ||
149 | |||
150 | /* | ||
151 | Need to consider the fragment situation | ||
152 | */ | ||
153 | void r8712_wep_encrypt(struct _adapter *padapter, u8 *pxmitframe) | ||
154 | { /* exclude ICV */ | ||
155 | unsigned char crc[4]; | ||
156 | struct arc4context mycontext; | ||
157 | u32 curfragnum, length, keylength; | ||
158 | u8 *pframe, *payload, *iv; /*,*wepkey*/ | ||
159 | u8 wepkey[16]; | ||
160 | struct pkt_attrib *pattrib = &((struct xmit_frame *) | ||
161 | pxmitframe)->attrib; | ||
162 | struct security_priv *psecuritypriv = &padapter->securitypriv; | ||
163 | struct xmit_priv *pxmitpriv = &padapter->xmitpriv; | ||
164 | |||
165 | if (((struct xmit_frame *)pxmitframe)->buf_addr == NULL) | ||
166 | return; | ||
167 | pframe = ((struct xmit_frame *)pxmitframe)->buf_addr+TXDESC_OFFSET; | ||
168 | /*start to encrypt each fragment*/ | ||
169 | if ((pattrib->encrypt == _WEP40_) || (pattrib->encrypt == _WEP104_)) { | ||
170 | keylength = psecuritypriv->DefKeylen[psecuritypriv-> | ||
171 | PrivacyKeyIndex]; | ||
172 | for (curfragnum = 0; curfragnum < pattrib->nr_frags; | ||
173 | curfragnum++) { | ||
174 | iv = pframe+pattrib->hdrlen; | ||
175 | memcpy(&wepkey[0], iv, 3); | ||
176 | memcpy(&wepkey[3], &psecuritypriv->DefKey[ | ||
177 | psecuritypriv->PrivacyKeyIndex].skey[0], | ||
178 | keylength); | ||
179 | payload = pframe+pattrib->iv_len+pattrib->hdrlen; | ||
180 | if ((curfragnum + 1) == pattrib->nr_frags) { | ||
181 | length = pattrib->last_txcmdsz-pattrib-> | ||
182 | hdrlen-pattrib->iv_len - | ||
183 | pattrib->icv_len; | ||
184 | *((u32 *)crc) = cpu_to_le32(getcrc32( | ||
185 | payload, length)); | ||
186 | arcfour_init(&mycontext, wepkey, 3 + keylength); | ||
187 | arcfour_encrypt(&mycontext, payload, payload, | ||
188 | length); | ||
189 | arcfour_encrypt(&mycontext, payload + length, | ||
190 | crc, 4); | ||
191 | } else { | ||
192 | length = pxmitpriv->frag_len-pattrib->hdrlen - | ||
193 | pattrib->iv_len-pattrib->icv_len; | ||
194 | *((u32 *)crc) = cpu_to_le32(getcrc32( | ||
195 | payload, length)); | ||
196 | arcfour_init(&mycontext, wepkey, 3 + keylength); | ||
197 | arcfour_encrypt(&mycontext, payload, payload, | ||
198 | length); | ||
199 | arcfour_encrypt(&mycontext, payload+length, | ||
200 | crc, 4); | ||
201 | pframe += pxmitpriv->frag_len; | ||
202 | pframe = (u8 *)RND4((addr_t)(pframe)); | ||
203 | } | ||
204 | } | ||
205 | } | ||
206 | } | ||
207 | |||
208 | void r8712_wep_decrypt(struct _adapter *padapter, u8 *precvframe) | ||
209 | { | ||
210 | /* exclude ICV */ | ||
211 | u8 crc[4]; | ||
212 | struct arc4context mycontext; | ||
213 | u32 length, keylength; | ||
214 | u8 *pframe, *payload, *iv, wepkey[16]; | ||
215 | u8 keyindex; | ||
216 | struct rx_pkt_attrib *prxattrib = &(((union recv_frame *) | ||
217 | precvframe)->u.hdr.attrib); | ||
218 | struct security_priv *psecuritypriv = &padapter->securitypriv; | ||
219 | |||
220 | pframe = (unsigned char *)((union recv_frame *)precvframe)-> | ||
221 | u.hdr.rx_data; | ||
222 | /* start to decrypt recvframe */ | ||
223 | if ((prxattrib->encrypt == _WEP40_) || (prxattrib->encrypt == | ||
224 | _WEP104_)) { | ||
225 | iv = pframe + prxattrib->hdrlen; | ||
226 | keyindex = (iv[3] & 0x3); | ||
227 | keylength = psecuritypriv->DefKeylen[keyindex]; | ||
228 | memcpy(&wepkey[0], iv, 3); | ||
229 | memcpy(&wepkey[3], &psecuritypriv->DefKey[ | ||
230 | psecuritypriv->PrivacyKeyIndex].skey[0], | ||
231 | keylength); | ||
232 | length = ((union recv_frame *)precvframe)-> | ||
233 | u.hdr.len-prxattrib->hdrlen-prxattrib->iv_len; | ||
234 | payload = pframe+prxattrib->iv_len+prxattrib->hdrlen; | ||
235 | /* decrypt payload include icv */ | ||
236 | arcfour_init(&mycontext, wepkey, 3 + keylength); | ||
237 | arcfour_encrypt(&mycontext, payload, payload, length); | ||
238 | /* calculate icv and compare the icv */ | ||
239 | *((u32 *)crc) = cpu_to_le32(getcrc32(payload, length - 4)); | ||
240 | } | ||
241 | return; | ||
242 | } | ||
243 | |||
244 | /* 3 =====TKIP related===== */ | ||
245 | |||
246 | static u32 secmicgetuint32(u8 *p) | ||
247 | /* Convert from Byte[] to Us4Byte32 in a portable way */ | ||
248 | { | ||
249 | s32 i; | ||
250 | u32 res = 0; | ||
251 | |||
252 | for (i = 0; i < 4; i++) | ||
253 | res |= ((u32)(*p++)) << (8 * i); | ||
254 | return res; | ||
255 | } | ||
256 | |||
257 | static void secmicputuint32(u8 *p, u32 val) | ||
258 | /* Convert from Us4Byte32 to Byte[] in a portable way */ | ||
259 | { | ||
260 | long i; | ||
261 | for (i = 0; i < 4; i++) { | ||
262 | *p++ = (u8) (val & 0xff); | ||
263 | val >>= 8; | ||
264 | } | ||
265 | } | ||
266 | |||
267 | static void secmicclear(struct mic_data *pmicdata) | ||
268 | { | ||
269 | /* Reset the state to the empty message. */ | ||
270 | pmicdata->L = pmicdata->K0; | ||
271 | pmicdata->R = pmicdata->K1; | ||
272 | pmicdata->nBytesInM = 0; | ||
273 | pmicdata->M = 0; | ||
274 | } | ||
275 | |||
276 | void r8712_secmicsetkey(struct mic_data *pmicdata, u8 * key) | ||
277 | { | ||
278 | /* Set the key */ | ||
279 | pmicdata->K0 = secmicgetuint32(key); | ||
280 | pmicdata->K1 = secmicgetuint32(key + 4); | ||
281 | /* and reset the message */ | ||
282 | secmicclear(pmicdata); | ||
283 | } | ||
284 | |||
285 | static void secmicappendbyte(struct mic_data *pmicdata, u8 b) | ||
286 | { | ||
287 | /* Append the byte to our word-sized buffer */ | ||
288 | pmicdata->M |= ((u32)b) << (8 * pmicdata->nBytesInM); | ||
289 | pmicdata->nBytesInM++; | ||
290 | /* Process the word if it is full. */ | ||
291 | if (pmicdata->nBytesInM >= 4) { | ||
292 | pmicdata->L ^= pmicdata->M; | ||
293 | pmicdata->R ^= ROL32(pmicdata->L, 17); | ||
294 | pmicdata->L += pmicdata->R; | ||
295 | pmicdata->R ^= ((pmicdata->L & 0xff00ff00) >> 8) | | ||
296 | ((pmicdata->L & 0x00ff00ff) << 8); | ||
297 | pmicdata->L += pmicdata->R; | ||
298 | pmicdata->R ^= ROL32(pmicdata->L, 3); | ||
299 | pmicdata->L += pmicdata->R; | ||
300 | pmicdata->R ^= ROR32(pmicdata->L, 2); | ||
301 | pmicdata->L += pmicdata->R; | ||
302 | /* Clear the buffer */ | ||
303 | pmicdata->M = 0; | ||
304 | pmicdata->nBytesInM = 0; | ||
305 | } | ||
306 | } | ||
307 | |||
308 | void r8712_secmicappend(struct mic_data *pmicdata, u8 * src, u32 nbytes) | ||
309 | { | ||
310 | /* This is simple */ | ||
311 | while (nbytes > 0) { | ||
312 | secmicappendbyte(pmicdata, *src++); | ||
313 | nbytes--; | ||
314 | } | ||
315 | } | ||
316 | |||
317 | void r8712_secgetmic(struct mic_data *pmicdata, u8 *dst) | ||
318 | { | ||
319 | /* Append the minimum padding */ | ||
320 | secmicappendbyte(pmicdata, 0x5a); | ||
321 | secmicappendbyte(pmicdata, 0); | ||
322 | secmicappendbyte(pmicdata, 0); | ||
323 | secmicappendbyte(pmicdata, 0); | ||
324 | secmicappendbyte(pmicdata, 0); | ||
325 | /* and then zeroes until the length is a multiple of 4 */ | ||
326 | while (pmicdata->nBytesInM != 0) | ||
327 | secmicappendbyte(pmicdata, 0); | ||
328 | /* The appendByte function has already computed the result. */ | ||
329 | secmicputuint32(dst, pmicdata->L); | ||
330 | secmicputuint32(dst + 4, pmicdata->R); | ||
331 | /* Reset to the empty message. */ | ||
332 | secmicclear(pmicdata); | ||
333 | } | ||
334 | |||
335 | void seccalctkipmic(u8 *key, u8 *header, u8 *data, u32 data_len, u8 *mic_code, | ||
336 | u8 pri) | ||
337 | { | ||
338 | |||
339 | struct mic_data micdata; | ||
340 | u8 priority[4] = {0x0, 0x0, 0x0, 0x0}; | ||
341 | |||
342 | r8712_secmicsetkey(&micdata, key); | ||
343 | priority[0] = pri; | ||
344 | /* Michael MIC pseudo header: DA, SA, 3 x 0, Priority */ | ||
345 | if (header[1] & 1) { /* ToDS==1 */ | ||
346 | r8712_secmicappend(&micdata, &header[16], 6); /* DA */ | ||
347 | if (header[1] & 2) /* From Ds==1 */ | ||
348 | r8712_secmicappend(&micdata, &header[24], 6); | ||
349 | else | ||
350 | r8712_secmicappend(&micdata, &header[10], 6); | ||
351 | } else { /* ToDS==0 */ | ||
352 | r8712_secmicappend(&micdata, &header[4], 6); /* DA */ | ||
353 | if (header[1] & 2) /* From Ds==1 */ | ||
354 | r8712_secmicappend(&micdata, &header[16], 6); | ||
355 | else | ||
356 | r8712_secmicappend(&micdata, &header[10], 6); | ||
357 | } | ||
358 | r8712_secmicappend(&micdata, &priority[0], 4); | ||
359 | r8712_secmicappend(&micdata, data, data_len); | ||
360 | r8712_secgetmic(&micdata, mic_code); | ||
361 | } | ||
362 | |||
363 | /* macros for extraction/creation of unsigned char/unsigned short values */ | ||
364 | #define RotR1(v16) ((((v16) >> 1) & 0x7FFF) ^ (((v16) & 1) << 15)) | ||
365 | #define Lo8(v16) ((u8)((v16) & 0x00FF)) | ||
366 | #define Hi8(v16) ((u8)(((v16) >> 8) & 0x00FF)) | ||
367 | #define Lo16(v32) ((u16)((v32) & 0xFFFF)) | ||
368 | #define Hi16(v32) ((u16)(((v32) >> 16) & 0xFFFF)) | ||
369 | #define Mk16(hi, lo) ((lo) ^ (((u16)(hi)) << 8)) | ||
370 | |||
371 | /* select the Nth 16-bit word of the temporal key unsigned char array TK[] */ | ||
372 | #define TK16(N) Mk16(tk[2 * (N) + 1], tk[2 * (N)]) | ||
373 | |||
374 | /* S-box lookup: 16 bits --> 16 bits */ | ||
375 | #define _S_(v16) (Sbox1[0][Lo8(v16)] ^ Sbox1[1][Hi8(v16)]) | ||
376 | |||
377 | /* fixed algorithm "parameters" */ | ||
378 | #define PHASE1_LOOP_CNT 8 /* this needs to be "big enough" */ | ||
379 | #define TA_SIZE 6 /* 48-bit transmitter address */ | ||
380 | #define TK_SIZE 16 /* 128-bit temporal key */ | ||
381 | #define P1K_SIZE 10 /* 80-bit Phase1 key */ | ||
382 | #define RC4_KEY_SIZE 16 /* 128-bit RC4KEY (104 bits unknown) */ | ||
383 | |||
384 | |||
385 | /* 2-unsigned char by 2-unsigned char subset of the full AES S-box table */ | ||
386 | static const unsigned short Sbox1[2][256] = {/* Sbox for hash (can be in ROM) */ | ||
387 | { | ||
388 | 0xC6A5, 0xF884, 0xEE99, 0xF68D, 0xFF0D, 0xD6BD, 0xDEB1, 0x9154, | ||
389 | 0x6050, 0x0203, 0xCEA9, 0x567D, 0xE719, 0xB562, 0x4DE6, 0xEC9A, | ||
390 | 0x8F45, 0x1F9D, 0x8940, 0xFA87, 0xEF15, 0xB2EB, 0x8EC9, 0xFB0B, | ||
391 | 0x41EC, 0xB367, 0x5FFD, 0x45EA, 0x23BF, 0x53F7, 0xE496, 0x9B5B, | ||
392 | 0x75C2, 0xE11C, 0x3DAE, 0x4C6A, 0x6C5A, 0x7E41, 0xF502, 0x834F, | ||
393 | 0x685C, 0x51F4, 0xD134, 0xF908, 0xE293, 0xAB73, 0x6253, 0x2A3F, | ||
394 | 0x080C, 0x9552, 0x4665, 0x9D5E, 0x3028, 0x37A1, 0x0A0F, 0x2FB5, | ||
395 | 0x0E09, 0x2436, 0x1B9B, 0xDF3D, 0xCD26, 0x4E69, 0x7FCD, 0xEA9F, | ||
396 | 0x121B, 0x1D9E, 0x5874, 0x342E, 0x362D, 0xDCB2, 0xB4EE, 0x5BFB, | ||
397 | 0xA4F6, 0x764D, 0xB761, 0x7DCE, 0x527B, 0xDD3E, 0x5E71, 0x1397, | ||
398 | 0xA6F5, 0xB968, 0x0000, 0xC12C, 0x4060, 0xE31F, 0x79C8, 0xB6ED, | ||
399 | 0xD4BE, 0x8D46, 0x67D9, 0x724B, 0x94DE, 0x98D4, 0xB0E8, 0x854A, | ||
400 | 0xBB6B, 0xC52A, 0x4FE5, 0xED16, 0x86C5, 0x9AD7, 0x6655, 0x1194, | ||
401 | 0x8ACF, 0xE910, 0x0406, 0xFE81, 0xA0F0, 0x7844, 0x25BA, 0x4BE3, | ||
402 | 0xA2F3, 0x5DFE, 0x80C0, 0x058A, 0x3FAD, 0x21BC, 0x7048, 0xF104, | ||
403 | 0x63DF, 0x77C1, 0xAF75, 0x4263, 0x2030, 0xE51A, 0xFD0E, 0xBF6D, | ||
404 | 0x814C, 0x1814, 0x2635, 0xC32F, 0xBEE1, 0x35A2, 0x88CC, 0x2E39, | ||
405 | 0x9357, 0x55F2, 0xFC82, 0x7A47, 0xC8AC, 0xBAE7, 0x322B, 0xE695, | ||
406 | 0xC0A0, 0x1998, 0x9ED1, 0xA37F, 0x4466, 0x547E, 0x3BAB, 0x0B83, | ||
407 | 0x8CCA, 0xC729, 0x6BD3, 0x283C, 0xA779, 0xBCE2, 0x161D, 0xAD76, | ||
408 | 0xDB3B, 0x6456, 0x744E, 0x141E, 0x92DB, 0x0C0A, 0x486C, 0xB8E4, | ||
409 | 0x9F5D, 0xBD6E, 0x43EF, 0xC4A6, 0x39A8, 0x31A4, 0xD337, 0xF28B, | ||
410 | 0xD532, 0x8B43, 0x6E59, 0xDAB7, 0x018C, 0xB164, 0x9CD2, 0x49E0, | ||
411 | 0xD8B4, 0xACFA, 0xF307, 0xCF25, 0xCAAF, 0xF48E, 0x47E9, 0x1018, | ||
412 | 0x6FD5, 0xF088, 0x4A6F, 0x5C72, 0x3824, 0x57F1, 0x73C7, 0x9751, | ||
413 | 0xCB23, 0xA17C, 0xE89C, 0x3E21, 0x96DD, 0x61DC, 0x0D86, 0x0F85, | ||
414 | 0xE090, 0x7C42, 0x71C4, 0xCCAA, 0x90D8, 0x0605, 0xF701, 0x1C12, | ||
415 | 0xC2A3, 0x6A5F, 0xAEF9, 0x69D0, 0x1791, 0x9958, 0x3A27, 0x27B9, | ||
416 | 0xD938, 0xEB13, 0x2BB3, 0x2233, 0xD2BB, 0xA970, 0x0789, 0x33A7, | ||
417 | 0x2DB6, 0x3C22, 0x1592, 0xC920, 0x8749, 0xAAFF, 0x5078, 0xA57A, | ||
418 | 0x038F, 0x59F8, 0x0980, 0x1A17, 0x65DA, 0xD731, 0x84C6, 0xD0B8, | ||
419 | 0x82C3, 0x29B0, 0x5A77, 0x1E11, 0x7BCB, 0xA8FC, 0x6DD6, 0x2C3A, | ||
420 | }, | ||
421 | { /* second half is unsigned char-reversed version of first! */ | ||
422 | 0xA5C6, 0x84F8, 0x99EE, 0x8DF6, 0x0DFF, 0xBDD6, 0xB1DE, 0x5491, | ||
423 | 0x5060, 0x0302, 0xA9CE, 0x7D56, 0x19E7, 0x62B5, 0xE64D, 0x9AEC, | ||
424 | 0x458F, 0x9D1F, 0x4089, 0x87FA, 0x15EF, 0xEBB2, 0xC98E, 0x0BFB, | ||
425 | 0xEC41, 0x67B3, 0xFD5F, 0xEA45, 0xBF23, 0xF753, 0x96E4, 0x5B9B, | ||
426 | 0xC275, 0x1CE1, 0xAE3D, 0x6A4C, 0x5A6C, 0x417E, 0x02F5, 0x4F83, | ||
427 | 0x5C68, 0xF451, 0x34D1, 0x08F9, 0x93E2, 0x73AB, 0x5362, 0x3F2A, | ||
428 | 0x0C08, 0x5295, 0x6546, 0x5E9D, 0x2830, 0xA137, 0x0F0A, 0xB52F, | ||
429 | 0x090E, 0x3624, 0x9B1B, 0x3DDF, 0x26CD, 0x694E, 0xCD7F, 0x9FEA, | ||
430 | 0x1B12, 0x9E1D, 0x7458, 0x2E34, 0x2D36, 0xB2DC, 0xEEB4, 0xFB5B, | ||
431 | 0xF6A4, 0x4D76, 0x61B7, 0xCE7D, 0x7B52, 0x3EDD, 0x715E, 0x9713, | ||
432 | 0xF5A6, 0x68B9, 0x0000, 0x2CC1, 0x6040, 0x1FE3, 0xC879, 0xEDB6, | ||
433 | 0xBED4, 0x468D, 0xD967, 0x4B72, 0xDE94, 0xD498, 0xE8B0, 0x4A85, | ||
434 | 0x6BBB, 0x2AC5, 0xE54F, 0x16ED, 0xC586, 0xD79A, 0x5566, 0x9411, | ||
435 | 0xCF8A, 0x10E9, 0x0604, 0x81FE, 0xF0A0, 0x4478, 0xBA25, 0xE34B, | ||
436 | 0xF3A2, 0xFE5D, 0xC080, 0x8A05, 0xAD3F, 0xBC21, 0x4870, 0x04F1, | ||
437 | 0xDF63, 0xC177, 0x75AF, 0x6342, 0x3020, 0x1AE5, 0x0EFD, 0x6DBF, | ||
438 | 0x4C81, 0x1418, 0x3526, 0x2FC3, 0xE1BE, 0xA235, 0xCC88, 0x392E, | ||
439 | 0x5793, 0xF255, 0x82FC, 0x477A, 0xACC8, 0xE7BA, 0x2B32, 0x95E6, | ||
440 | 0xA0C0, 0x9819, 0xD19E, 0x7FA3, 0x6644, 0x7E54, 0xAB3B, 0x830B, | ||
441 | 0xCA8C, 0x29C7, 0xD36B, 0x3C28, 0x79A7, 0xE2BC, 0x1D16, 0x76AD, | ||
442 | 0x3BDB, 0x5664, 0x4E74, 0x1E14, 0xDB92, 0x0A0C, 0x6C48, 0xE4B8, | ||
443 | 0x5D9F, 0x6EBD, 0xEF43, 0xA6C4, 0xA839, 0xA431, 0x37D3, 0x8BF2, | ||
444 | 0x32D5, 0x438B, 0x596E, 0xB7DA, 0x8C01, 0x64B1, 0xD29C, 0xE049, | ||
445 | 0xB4D8, 0xFAAC, 0x07F3, 0x25CF, 0xAFCA, 0x8EF4, 0xE947, 0x1810, | ||
446 | 0xD56F, 0x88F0, 0x6F4A, 0x725C, 0x2438, 0xF157, 0xC773, 0x5197, | ||
447 | 0x23CB, 0x7CA1, 0x9CE8, 0x213E, 0xDD96, 0xDC61, 0x860D, 0x850F, | ||
448 | 0x90E0, 0x427C, 0xC471, 0xAACC, 0xD890, 0x0506, 0x01F7, 0x121C, | ||
449 | 0xA3C2, 0x5F6A, 0xF9AE, 0xD069, 0x9117, 0x5899, 0x273A, 0xB927, | ||
450 | 0x38D9, 0x13EB, 0xB32B, 0x3322, 0xBBD2, 0x70A9, 0x8907, 0xA733, | ||
451 | 0xB62D, 0x223C, 0x9215, 0x20C9, 0x4987, 0xFFAA, 0x7850, 0x7AA5, | ||
452 | 0x8F03, 0xF859, 0x8009, 0x171A, 0xDA65, 0x31D7, 0xC684, 0xB8D0, | ||
453 | 0xC382, 0xB029, 0x775A, 0x111E, 0xCB7B, 0xFCA8, 0xD66D, 0x3A2C, | ||
454 | } | ||
455 | }; | ||
456 | |||
457 | /* | ||
458 | ********************************************************************** | ||
459 | * Routine: Phase 1 -- generate P1K, given TA, TK, IV32 | ||
460 | * | ||
461 | * Inputs: | ||
462 | * tk[] = temporal key [128 bits] | ||
463 | * ta[] = transmitter's MAC address [ 48 bits] | ||
464 | * iv32 = upper 32 bits of IV [ 32 bits] | ||
465 | * Output: | ||
466 | * p1k[] = Phase 1 key [ 80 bits] | ||
467 | * | ||
468 | * Note: | ||
469 | * This function only needs to be called every 2**16 packets, | ||
470 | * although in theory it could be called every packet. | ||
471 | * | ||
472 | ********************************************************************** | ||
473 | */ | ||
474 | static void phase1(u16 *p1k, const u8 *tk, const u8 *ta, u32 iv32) | ||
475 | { | ||
476 | sint i; | ||
477 | |||
478 | /* Initialize the 80 bits of P1K[] from IV32 and TA[0..5] */ | ||
479 | p1k[0] = Lo16(iv32); | ||
480 | p1k[1] = Hi16(iv32); | ||
481 | p1k[2] = Mk16(ta[1], ta[0]); /* use TA[] as little-endian */ | ||
482 | p1k[3] = Mk16(ta[3], ta[2]); | ||
483 | p1k[4] = Mk16(ta[5], ta[4]); | ||
484 | /* Now compute an unbalanced Feistel cipher with 80-bit block */ | ||
485 | /* size on the 80-bit block P1K[], using the 128-bit key TK[] */ | ||
486 | for (i = 0; i < PHASE1_LOOP_CNT; i++) { /* Each add is mod 2**16 */ | ||
487 | p1k[0] += _S_(p1k[4] ^ TK16((i&1) + 0)); | ||
488 | p1k[1] += _S_(p1k[0] ^ TK16((i&1) + 2)); | ||
489 | p1k[2] += _S_(p1k[1] ^ TK16((i&1) + 4)); | ||
490 | p1k[3] += _S_(p1k[2] ^ TK16((i&1) + 6)); | ||
491 | p1k[4] += _S_(p1k[3] ^ TK16((i&1) + 0)); | ||
492 | p1k[4] += (unsigned short)i; /* avoid "slide attacks" */ | ||
493 | } | ||
494 | } | ||
495 | |||
496 | /* | ||
497 | ********************************************************************** | ||
498 | * Routine: Phase 2 -- generate RC4KEY, given TK, P1K, IV16 | ||
499 | * | ||
500 | * Inputs: | ||
501 | * tk[] = Temporal key [128 bits] | ||
502 | * p1k[] = Phase 1 output key [ 80 bits] | ||
503 | * iv16 = low 16 bits of IV counter [ 16 bits] | ||
504 | * Output: | ||
505 | * rc4key[] = the key used to encrypt the packet [128 bits] | ||
506 | * | ||
507 | * Note: | ||
508 | * The value {TA,IV32,IV16} for Phase1/Phase2 must be unique | ||
509 | * across all packets using the same key TK value. Then, for a | ||
510 | * given value of TK[], this TKIP48 construction guarantees that | ||
511 | * the final RC4KEY value is unique across all packets. | ||
512 | * | ||
513 | * Suggested implementation optimization: if PPK[] is "overlaid" | ||
514 | * appropriately on RC4KEY[], there is no need for the final | ||
515 | * for loop below that copies the PPK[] result into RC4KEY[]. | ||
516 | * | ||
517 | ********************************************************************** | ||
518 | */ | ||
519 | static void phase2(u8 *rc4key, const u8 *tk, const u16 *p1k, u16 iv16) | ||
520 | { | ||
521 | sint i; | ||
522 | u16 PPK[6]; /* temporary key for mixing */ | ||
523 | |||
524 | /* Note: all adds in the PPK[] equations below are mod 2**16 */ | ||
525 | for (i = 0; i < 5; i++) | ||
526 | PPK[i] = p1k[i]; /* first, copy P1K to PPK */ | ||
527 | PPK[5] = p1k[4] + iv16; /* next, add in IV16 */ | ||
528 | /* Bijective non-linear mixing of the 96 bits of PPK[0..5] */ | ||
529 | PPK[0] += _S_(PPK[5] ^ TK16(0)); /* Mix key in each "round" */ | ||
530 | PPK[1] += _S_(PPK[0] ^ TK16(1)); | ||
531 | PPK[2] += _S_(PPK[1] ^ TK16(2)); | ||
532 | PPK[3] += _S_(PPK[2] ^ TK16(3)); | ||
533 | PPK[4] += _S_(PPK[3] ^ TK16(4)); | ||
534 | PPK[5] += _S_(PPK[4] ^ TK16(5)); /* Total # S-box lookups == 6 */ | ||
535 | /* Final sweep: bijective, "linear". Rotates kill LSB correlations */ | ||
536 | PPK[0] += RotR1(PPK[5] ^ TK16(6)); | ||
537 | PPK[1] += RotR1(PPK[0] ^ TK16(7)); /* Use all of TK[] in Phase2 */ | ||
538 | PPK[2] += RotR1(PPK[1]); | ||
539 | PPK[3] += RotR1(PPK[2]); | ||
540 | PPK[4] += RotR1(PPK[3]); | ||
541 | PPK[5] += RotR1(PPK[4]); | ||
542 | /* Note: At this point, for a given key TK[0..15], the 96-bit output */ | ||
543 | /* value PPK[0..5] is guaranteed to be unique, as a function */ | ||
544 | /* of the 96-bit "input" value {TA,IV32,IV16}. That is, P1K */ | ||
545 | /* is now a keyed permutation of {TA,IV32,IV16}. */ | ||
546 | /* Set RC4KEY[0..3], which includes "cleartext" portion of RC4 key */ | ||
547 | rc4key[0] = Hi8(iv16); /* RC4KEY[0..2] is the WEP IV */ | ||
548 | rc4key[1] = (Hi8(iv16) | 0x20) & 0x7F; /* Help avoid weak (FMS) keys */ | ||
549 | rc4key[2] = Lo8(iv16); | ||
550 | rc4key[3] = Lo8((PPK[5] ^ TK16(0)) >> 1); | ||
551 | /* Copy 96 bits of PPK[0..5] to RC4KEY[4..15] (little-endian) */ | ||
552 | for (i = 0; i < 6; i++) { | ||
553 | rc4key[4 + 2 * i] = Lo8(PPK[i]); | ||
554 | rc4key[5 + 2 * i] = Hi8(PPK[i]); | ||
555 | } | ||
556 | } | ||
557 | |||
558 | /*The hlen isn't include the IV*/ | ||
559 | u32 r8712_tkip_encrypt(struct _adapter *padapter, u8 *pxmitframe) | ||
560 | { /* exclude ICV */ | ||
561 | u16 pnl; | ||
562 | u32 pnh; | ||
563 | u8 rc4key[16]; | ||
564 | u8 ttkey[16]; | ||
565 | u8 crc[4]; | ||
566 | struct arc4context mycontext; | ||
567 | u32 curfragnum, length, prwskeylen; | ||
568 | |||
569 | u8 *pframe, *payload, *iv, *prwskey; | ||
570 | union pn48 txpn; | ||
571 | struct sta_info *stainfo; | ||
572 | struct pkt_attrib *pattrib = &((struct xmit_frame *)pxmitframe)->attrib; | ||
573 | struct xmit_priv *pxmitpriv = &padapter->xmitpriv; | ||
574 | u32 res = _SUCCESS; | ||
575 | |||
576 | if (((struct xmit_frame *)pxmitframe)->buf_addr == NULL) | ||
577 | return _FAIL; | ||
578 | |||
579 | pframe = ((struct xmit_frame *)pxmitframe)->buf_addr+TXDESC_OFFSET; | ||
580 | /* 4 start to encrypt each fragment */ | ||
581 | if (pattrib->encrypt == _TKIP_) { | ||
582 | if (pattrib->psta) | ||
583 | stainfo = pattrib->psta; | ||
584 | else | ||
585 | stainfo = r8712_get_stainfo(&padapter->stapriv, | ||
586 | &pattrib->ra[0]); | ||
587 | if (stainfo != NULL) { | ||
588 | prwskey = &stainfo->x_UncstKey.skey[0]; | ||
589 | prwskeylen = 16; | ||
590 | for (curfragnum = 0; curfragnum < pattrib->nr_frags; | ||
591 | curfragnum++) { | ||
592 | iv = pframe + pattrib->hdrlen; | ||
593 | payload = pframe+pattrib->iv_len + | ||
594 | pattrib->hdrlen; | ||
595 | GET_TKIP_PN(iv, txpn); | ||
596 | pnl = (u16)(txpn.val); | ||
597 | pnh = (u32)(txpn.val >> 16); | ||
598 | phase1((u16 *)&ttkey[0], prwskey, &pattrib-> | ||
599 | ta[0], pnh); | ||
600 | phase2(&rc4key[0], prwskey, (u16 *)&ttkey[0], | ||
601 | pnl); | ||
602 | if ((curfragnum + 1) == pattrib->nr_frags) { | ||
603 | /* 4 the last fragment */ | ||
604 | length = pattrib->last_txcmdsz - | ||
605 | pattrib->hdrlen-pattrib->iv_len - | ||
606 | pattrib->icv_len; | ||
607 | *((u32 *)crc) = cpu_to_le32( | ||
608 | getcrc32(payload, length)); | ||
609 | arcfour_init(&mycontext, rc4key, 16); | ||
610 | arcfour_encrypt(&mycontext, payload, | ||
611 | payload, length); | ||
612 | arcfour_encrypt(&mycontext, payload + | ||
613 | length, crc, 4); | ||
614 | } else { | ||
615 | length = pxmitpriv->frag_len-pattrib-> | ||
616 | hdrlen-pattrib-> | ||
617 | iv_len-pattrib->icv_len; | ||
618 | *((u32 *)crc) = cpu_to_le32(getcrc32( | ||
619 | payload, length)); | ||
620 | arcfour_init(&mycontext, rc4key, 16); | ||
621 | arcfour_encrypt(&mycontext, payload, | ||
622 | payload, length); | ||
623 | arcfour_encrypt(&mycontext, | ||
624 | payload+length, crc, 4); | ||
625 | pframe += pxmitpriv->frag_len; | ||
626 | pframe = (u8 *)RND4((addr_t)(pframe)); | ||
627 | } | ||
628 | } | ||
629 | } else | ||
630 | res = _FAIL; | ||
631 | } | ||
632 | return res; | ||
633 | } | ||
634 | |||
635 | /* The hlen doesn't include the IV */ | ||
636 | u32 r8712_tkip_decrypt(struct _adapter *padapter, u8 *precvframe) | ||
637 | { /* exclude ICV */ | ||
638 | u16 pnl; | ||
639 | u32 pnh; | ||
640 | u8 rc4key[16]; | ||
641 | u8 ttkey[16]; | ||
642 | u8 crc[4]; | ||
643 | struct arc4context mycontext; | ||
644 | u32 length, prwskeylen; | ||
645 | u8 *pframe, *payload, *iv, *prwskey, idx = 0; | ||
646 | union pn48 txpn; | ||
647 | struct sta_info *stainfo; | ||
648 | struct rx_pkt_attrib *prxattrib = &((union recv_frame *) | ||
649 | precvframe)->u.hdr.attrib; | ||
650 | struct security_priv *psecuritypriv = &padapter->securitypriv; | ||
651 | |||
652 | pframe = (unsigned char *)((union recv_frame *) | ||
653 | precvframe)->u.hdr.rx_data; | ||
654 | /* 4 start to decrypt recvframe */ | ||
655 | if (prxattrib->encrypt == _TKIP_) { | ||
656 | stainfo = r8712_get_stainfo(&padapter->stapriv, | ||
657 | &prxattrib->ta[0]); | ||
658 | if (stainfo != NULL) { | ||
659 | iv = pframe+prxattrib->hdrlen; | ||
660 | payload = pframe+prxattrib->iv_len + prxattrib->hdrlen; | ||
661 | length = ((union recv_frame *)precvframe)-> | ||
662 | u.hdr.len - prxattrib->hdrlen - | ||
663 | prxattrib->iv_len; | ||
664 | if (IS_MCAST(prxattrib->ra)) { | ||
665 | idx = iv[3]; | ||
666 | prwskey = &psecuritypriv->XGrpKey[ | ||
667 | ((idx >> 6) & 0x3) - 1].skey[0]; | ||
668 | if (psecuritypriv->binstallGrpkey == false) | ||
669 | return _FAIL; | ||
670 | } else | ||
671 | prwskey = &stainfo->x_UncstKey.skey[0]; | ||
672 | prwskeylen = 16; | ||
673 | GET_TKIP_PN(iv, txpn); | ||
674 | pnl = (u16)(txpn.val); | ||
675 | pnh = (u32)(txpn.val >> 16); | ||
676 | phase1((u16 *)&ttkey[0], prwskey, &prxattrib->ta[0], | ||
677 | pnh); | ||
678 | phase2(&rc4key[0], prwskey, (unsigned short *) | ||
679 | &ttkey[0], pnl); | ||
680 | /* 4 decrypt payload include icv */ | ||
681 | arcfour_init(&mycontext, rc4key, 16); | ||
682 | arcfour_encrypt(&mycontext, payload, payload, length); | ||
683 | *((u32 *)crc) = cpu_to_le32(getcrc32(payload, | ||
684 | length - 4)); | ||
685 | if (crc[3] != payload[length - 1] || | ||
686 | crc[2] != payload[length - 2] || | ||
687 | crc[1] != payload[length - 3] || | ||
688 | crc[0] != payload[length - 4]) | ||
689 | return _FAIL; | ||
690 | } else | ||
691 | return _FAIL; | ||
692 | } | ||
693 | return _SUCCESS; | ||
694 | } | ||
695 | |||
696 | /* 3 =====AES related===== */ | ||
697 | |||
698 | #define MAX_MSG_SIZE 2048 | ||
699 | /*****************************/ | ||
700 | /******** SBOX Table *********/ | ||
701 | /*****************************/ | ||
702 | |||
703 | static const u8 sbox_table[256] = { | ||
704 | 0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5, | ||
705 | 0x30, 0x01, 0x67, 0x2b, 0xfe, 0xd7, 0xab, 0x76, | ||
706 | 0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0, | ||
707 | 0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0, | ||
708 | 0xb7, 0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7, 0xcc, | ||
709 | 0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15, | ||
710 | 0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a, | ||
711 | 0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75, | ||
712 | 0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0, | ||
713 | 0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84, | ||
714 | 0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b, | ||
715 | 0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf, | ||
716 | 0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85, | ||
717 | 0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c, 0x9f, 0xa8, | ||
718 | 0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5, | ||
719 | 0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2, | ||
720 | 0xcd, 0x0c, 0x13, 0xec, 0x5f, 0x97, 0x44, 0x17, | ||
721 | 0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73, | ||
722 | 0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88, | ||
723 | 0x46, 0xee, 0xb8, 0x14, 0xde, 0x5e, 0x0b, 0xdb, | ||
724 | 0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c, | ||
725 | 0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79, | ||
726 | 0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5, 0x4e, 0xa9, | ||
727 | 0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08, | ||
728 | 0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6, | ||
729 | 0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a, | ||
730 | 0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e, | ||
731 | 0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e, | ||
732 | 0xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9, 0x8e, 0x94, | ||
733 | 0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf, | ||
734 | 0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68, | ||
735 | 0x41, 0x99, 0x2d, 0x0f, 0xb0, 0x54, 0xbb, 0x16 | ||
736 | }; | ||
737 | |||
738 | /****************************************/ | ||
739 | /* aes128k128d() */ | ||
740 | /* Performs a 128 bit AES encrypt with */ | ||
741 | /* 128 bit data. */ | ||
742 | /****************************************/ | ||
743 | static void xor_128(u8 *a, u8 *b, u8 *out) | ||
744 | { | ||
745 | sint i; | ||
746 | |||
747 | for (i = 0; i < 16; i++) | ||
748 | out[i] = a[i] ^ b[i]; | ||
749 | } | ||
750 | |||
751 | static void xor_32(u8 *a, u8 *b, u8 *out) | ||
752 | { | ||
753 | sint i; | ||
754 | for (i = 0; i < 4; i++) | ||
755 | out[i] = a[i] ^ b[i]; | ||
756 | } | ||
757 | |||
758 | static u8 sbox(u8 a) | ||
759 | { | ||
760 | return sbox_table[(sint)a]; | ||
761 | } | ||
762 | |||
763 | static void next_key(u8 *key, sint round) | ||
764 | { | ||
765 | u8 rcon; | ||
766 | u8 sbox_key[4]; | ||
767 | u8 rcon_table[12] = { | ||
768 | 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, | ||
769 | 0x1b, 0x36, 0x36, 0x36 | ||
770 | }; | ||
771 | |||
772 | sbox_key[0] = sbox(key[13]); | ||
773 | sbox_key[1] = sbox(key[14]); | ||
774 | sbox_key[2] = sbox(key[15]); | ||
775 | sbox_key[3] = sbox(key[12]); | ||
776 | rcon = rcon_table[round]; | ||
777 | xor_32(&key[0], sbox_key, &key[0]); | ||
778 | key[0] = key[0] ^ rcon; | ||
779 | xor_32(&key[4], &key[0], &key[4]); | ||
780 | xor_32(&key[8], &key[4], &key[8]); | ||
781 | xor_32(&key[12], &key[8], &key[12]); | ||
782 | } | ||
783 | |||
784 | static void byte_sub(u8 *in, u8 *out) | ||
785 | { | ||
786 | sint i; | ||
787 | for (i = 0; i < 16; i++) | ||
788 | out[i] = sbox(in[i]); | ||
789 | } | ||
790 | |||
791 | static void shift_row(u8 *in, u8 *out) | ||
792 | { | ||
793 | out[0] = in[0]; | ||
794 | out[1] = in[5]; | ||
795 | out[2] = in[10]; | ||
796 | out[3] = in[15]; | ||
797 | out[4] = in[4]; | ||
798 | out[5] = in[9]; | ||
799 | out[6] = in[14]; | ||
800 | out[7] = in[3]; | ||
801 | out[8] = in[8]; | ||
802 | out[9] = in[13]; | ||
803 | out[10] = in[2]; | ||
804 | out[11] = in[7]; | ||
805 | out[12] = in[12]; | ||
806 | out[13] = in[1]; | ||
807 | out[14] = in[6]; | ||
808 | out[15] = in[11]; | ||
809 | } | ||
810 | |||
811 | static void mix_column(u8 *in, u8 *out) | ||
812 | { | ||
813 | sint i; | ||
814 | u8 add1b[4]; | ||
815 | u8 add1bf7[4]; | ||
816 | u8 rotl[4]; | ||
817 | u8 swap_halfs[4]; | ||
818 | u8 andf7[4]; | ||
819 | u8 rotr[4]; | ||
820 | u8 temp[4]; | ||
821 | u8 tempb[4]; | ||
822 | |||
823 | for (i = 0 ; i < 4; i++) { | ||
824 | if ((in[i] & 0x80) == 0x80) | ||
825 | add1b[i] = 0x1b; | ||
826 | else | ||
827 | add1b[i] = 0x00; | ||
828 | } | ||
829 | swap_halfs[0] = in[2]; /* Swap halves */ | ||
830 | swap_halfs[1] = in[3]; | ||
831 | swap_halfs[2] = in[0]; | ||
832 | swap_halfs[3] = in[1]; | ||
833 | rotl[0] = in[3]; /* Rotate left 8 bits */ | ||
834 | rotl[1] = in[0]; | ||
835 | rotl[2] = in[1]; | ||
836 | rotl[3] = in[2]; | ||
837 | andf7[0] = in[0] & 0x7f; | ||
838 | andf7[1] = in[1] & 0x7f; | ||
839 | andf7[2] = in[2] & 0x7f; | ||
840 | andf7[3] = in[3] & 0x7f; | ||
841 | for (i = 3; i > 0; i--) { /* logical shift left 1 bit */ | ||
842 | andf7[i] = andf7[i] << 1; | ||
843 | if ((andf7[i-1] & 0x80) == 0x80) | ||
844 | andf7[i] = (andf7[i] | 0x01); | ||
845 | } | ||
846 | andf7[0] = andf7[0] << 1; | ||
847 | andf7[0] = andf7[0] & 0xfe; | ||
848 | xor_32(add1b, andf7, add1bf7); | ||
849 | xor_32(in, add1bf7, rotr); | ||
850 | temp[0] = rotr[0]; /* Rotate right 8 bits */ | ||
851 | rotr[0] = rotr[1]; | ||
852 | rotr[1] = rotr[2]; | ||
853 | rotr[2] = rotr[3]; | ||
854 | rotr[3] = temp[0]; | ||
855 | xor_32(add1bf7, rotr, temp); | ||
856 | xor_32(swap_halfs, rotl, tempb); | ||
857 | xor_32(temp, tempb, out); | ||
858 | } | ||
859 | |||
860 | static void aes128k128d(u8 *key, u8 *data, u8 *ciphertext) | ||
861 | { | ||
862 | sint round; | ||
863 | sint i; | ||
864 | u8 intermediatea[16]; | ||
865 | u8 intermediateb[16]; | ||
866 | u8 round_key[16]; | ||
867 | |||
868 | for (i = 0; i < 16; i++) | ||
869 | round_key[i] = key[i]; | ||
870 | for (round = 0; round < 11; round++) { | ||
871 | if (round == 0) { | ||
872 | xor_128(round_key, data, ciphertext); | ||
873 | next_key(round_key, round); | ||
874 | } else if (round == 10) { | ||
875 | byte_sub(ciphertext, intermediatea); | ||
876 | shift_row(intermediatea, intermediateb); | ||
877 | xor_128(intermediateb, round_key, ciphertext); | ||
878 | } else { /* 1 - 9 */ | ||
879 | byte_sub(ciphertext, intermediatea); | ||
880 | shift_row(intermediatea, intermediateb); | ||
881 | mix_column(&intermediateb[0], &intermediatea[0]); | ||
882 | mix_column(&intermediateb[4], &intermediatea[4]); | ||
883 | mix_column(&intermediateb[8], &intermediatea[8]); | ||
884 | mix_column(&intermediateb[12], &intermediatea[12]); | ||
885 | xor_128(intermediatea, round_key, ciphertext); | ||
886 | next_key(round_key, round); | ||
887 | } | ||
888 | } | ||
889 | } | ||
890 | |||
891 | /************************************************/ | ||
892 | /* construct_mic_iv() */ | ||
893 | /* Builds the MIC IV from header fields and PN */ | ||
894 | /************************************************/ | ||
895 | static void construct_mic_iv(u8 *mic_iv, sint qc_exists, sint a4_exists, | ||
896 | u8 *mpdu, uint payload_length, u8 *pn_vector) | ||
897 | { | ||
898 | sint i; | ||
899 | |||
900 | mic_iv[0] = 0x59; | ||
901 | if (qc_exists && a4_exists) | ||
902 | mic_iv[1] = mpdu[30] & 0x0f; /* QoS_TC */ | ||
903 | if (qc_exists && !a4_exists) | ||
904 | mic_iv[1] = mpdu[24] & 0x0f; /* mute bits 7-4 */ | ||
905 | if (!qc_exists) | ||
906 | mic_iv[1] = 0x00; | ||
907 | for (i = 2; i < 8; i++) | ||
908 | mic_iv[i] = mpdu[i + 8]; | ||
909 | for (i = 8; i < 14; i++) | ||
910 | mic_iv[i] = pn_vector[13 - i]; /* mic_iv[8:13] = PN[5:0] */ | ||
911 | mic_iv[14] = (unsigned char) (payload_length / 256); | ||
912 | mic_iv[15] = (unsigned char) (payload_length % 256); | ||
913 | } | ||
914 | |||
915 | /************************************************/ | ||
916 | /* construct_mic_header1() */ | ||
917 | /* Builds the first MIC header block from */ | ||
918 | /* header fields. */ | ||
919 | /************************************************/ | ||
920 | static void construct_mic_header1(u8 *mic_header1, sint header_length, u8 *mpdu) | ||
921 | { | ||
922 | mic_header1[0] = (u8)((header_length - 2) / 256); | ||
923 | mic_header1[1] = (u8)((header_length - 2) % 256); | ||
924 | mic_header1[2] = mpdu[0] & 0xcf; /* Mute CF poll & CF ack bits */ | ||
925 | /* Mute retry, more data and pwr mgt bits */ | ||
926 | mic_header1[3] = mpdu[1] & 0xc7; | ||
927 | mic_header1[4] = mpdu[4]; /* A1 */ | ||
928 | mic_header1[5] = mpdu[5]; | ||
929 | mic_header1[6] = mpdu[6]; | ||
930 | mic_header1[7] = mpdu[7]; | ||
931 | mic_header1[8] = mpdu[8]; | ||
932 | mic_header1[9] = mpdu[9]; | ||
933 | mic_header1[10] = mpdu[10]; /* A2 */ | ||
934 | mic_header1[11] = mpdu[11]; | ||
935 | mic_header1[12] = mpdu[12]; | ||
936 | mic_header1[13] = mpdu[13]; | ||
937 | mic_header1[14] = mpdu[14]; | ||
938 | mic_header1[15] = mpdu[15]; | ||
939 | } | ||
940 | |||
941 | /************************************************/ | ||
942 | /* construct_mic_header2() */ | ||
943 | /* Builds the last MIC header block from */ | ||
944 | /* header fields. */ | ||
945 | /************************************************/ | ||
946 | static void construct_mic_header2(u8 *mic_header2, u8 *mpdu, sint a4_exists, | ||
947 | sint qc_exists) | ||
948 | { | ||
949 | sint i; | ||
950 | |||
951 | for (i = 0; i < 16; i++) | ||
952 | mic_header2[i] = 0x00; | ||
953 | mic_header2[0] = mpdu[16]; /* A3 */ | ||
954 | mic_header2[1] = mpdu[17]; | ||
955 | mic_header2[2] = mpdu[18]; | ||
956 | mic_header2[3] = mpdu[19]; | ||
957 | mic_header2[4] = mpdu[20]; | ||
958 | mic_header2[5] = mpdu[21]; | ||
959 | mic_header2[6] = 0x00; | ||
960 | mic_header2[7] = 0x00; /* mpdu[23]; */ | ||
961 | if (!qc_exists && a4_exists) | ||
962 | for (i = 0; i < 6; i++) | ||
963 | mic_header2[8 + i] = mpdu[24 + i]; /* A4 */ | ||
964 | if (qc_exists && !a4_exists) { | ||
965 | mic_header2[8] = mpdu[24] & 0x0f; /* mute bits 15 - 4 */ | ||
966 | mic_header2[9] = mpdu[25] & 0x00; | ||
967 | } | ||
968 | if (qc_exists && a4_exists) { | ||
969 | for (i = 0; i < 6; i++) | ||
970 | mic_header2[8 + i] = mpdu[24 + i]; /* A4 */ | ||
971 | mic_header2[14] = mpdu[30] & 0x0f; | ||
972 | mic_header2[15] = mpdu[31] & 0x00; | ||
973 | } | ||
974 | } | ||
975 | |||
976 | /************************************************/ | ||
977 | /* construct_mic_header2() */ | ||
978 | /* Builds the last MIC header block from */ | ||
979 | /* header fields. */ | ||
980 | /************************************************/ | ||
981 | static void construct_ctr_preload(u8 *ctr_preload, sint a4_exists, sint qc_exists, | ||
982 | u8 *mpdu, u8 *pn_vector, sint c) | ||
983 | { | ||
984 | sint i; | ||
985 | |||
986 | for (i = 0; i < 16; i++) | ||
987 | ctr_preload[i] = 0x00; | ||
988 | i = 0; | ||
989 | ctr_preload[0] = 0x01; /* flag */ | ||
990 | if (qc_exists && a4_exists) | ||
991 | ctr_preload[1] = mpdu[30] & 0x0f; | ||
992 | if (qc_exists && !a4_exists) | ||
993 | ctr_preload[1] = mpdu[24] & 0x0f; | ||
994 | for (i = 2; i < 8; i++) | ||
995 | ctr_preload[i] = mpdu[i + 8]; | ||
996 | for (i = 8; i < 14; i++) | ||
997 | ctr_preload[i] = pn_vector[13 - i]; | ||
998 | ctr_preload[14] = (unsigned char) (c / 256); /* Ctr */ | ||
999 | ctr_preload[15] = (unsigned char) (c % 256); | ||
1000 | } | ||
1001 | |||
1002 | /************************************/ | ||
1003 | /* bitwise_xor() */ | ||
1004 | /* A 128 bit, bitwise exclusive or */ | ||
1005 | /************************************/ | ||
1006 | static void bitwise_xor(u8 *ina, u8 *inb, u8 *out) | ||
1007 | { | ||
1008 | sint i; | ||
1009 | |||
1010 | for (i = 0; i < 16; i++) | ||
1011 | out[i] = ina[i] ^ inb[i]; | ||
1012 | } | ||
1013 | |||
1014 | static sint aes_cipher(u8 *key, uint hdrlen, | ||
1015 | u8 *pframe, uint plen) | ||
1016 | { | ||
1017 | uint qc_exists, a4_exists, i, j, payload_remainder; | ||
1018 | uint num_blocks, payload_index; | ||
1019 | |||
1020 | u8 pn_vector[6]; | ||
1021 | u8 mic_iv[16]; | ||
1022 | u8 mic_header1[16]; | ||
1023 | u8 mic_header2[16]; | ||
1024 | u8 ctr_preload[16]; | ||
1025 | |||
1026 | /* Intermediate Buffers */ | ||
1027 | u8 chain_buffer[16]; | ||
1028 | u8 aes_out[16]; | ||
1029 | u8 padded_buffer[16]; | ||
1030 | u8 mic[8]; | ||
1031 | uint frtype = GetFrameType(pframe); | ||
1032 | uint frsubtype = GetFrameSubType(pframe); | ||
1033 | |||
1034 | frsubtype = frsubtype >> 4; | ||
1035 | memset((void *)mic_iv, 0, 16); | ||
1036 | memset((void *)mic_header1, 0, 16); | ||
1037 | memset((void *)mic_header2, 0, 16); | ||
1038 | memset((void *)ctr_preload, 0, 16); | ||
1039 | memset((void *)chain_buffer, 0, 16); | ||
1040 | memset((void *)aes_out, 0, 16); | ||
1041 | memset((void *)padded_buffer, 0, 16); | ||
1042 | |||
1043 | if ((hdrlen == WLAN_HDR_A3_LEN) || (hdrlen == WLAN_HDR_A3_QOS_LEN)) | ||
1044 | a4_exists = 0; | ||
1045 | else | ||
1046 | a4_exists = 1; | ||
1047 | |||
1048 | if ((frtype == WIFI_DATA_CFACK) || | ||
1049 | (frtype == WIFI_DATA_CFPOLL) || | ||
1050 | (frtype == WIFI_DATA_CFACKPOLL)) { | ||
1051 | qc_exists = 1; | ||
1052 | if (hdrlen != WLAN_HDR_A3_QOS_LEN) | ||
1053 | hdrlen += 2; | ||
1054 | } else if ((frsubtype == 0x08) || | ||
1055 | (frsubtype == 0x09) || | ||
1056 | (frsubtype == 0x0a) || | ||
1057 | (frsubtype == 0x0b)) { | ||
1058 | if (hdrlen != WLAN_HDR_A3_QOS_LEN) | ||
1059 | hdrlen += 2; | ||
1060 | qc_exists = 1; | ||
1061 | } else | ||
1062 | qc_exists = 0; | ||
1063 | pn_vector[0] = pframe[hdrlen]; | ||
1064 | pn_vector[1] = pframe[hdrlen+1]; | ||
1065 | pn_vector[2] = pframe[hdrlen+4]; | ||
1066 | pn_vector[3] = pframe[hdrlen+5]; | ||
1067 | pn_vector[4] = pframe[hdrlen+6]; | ||
1068 | pn_vector[5] = pframe[hdrlen+7]; | ||
1069 | construct_mic_iv(mic_iv, qc_exists, a4_exists, pframe, plen, pn_vector); | ||
1070 | construct_mic_header1(mic_header1, hdrlen, pframe); | ||
1071 | construct_mic_header2(mic_header2, pframe, a4_exists, qc_exists); | ||
1072 | payload_remainder = plen % 16; | ||
1073 | num_blocks = plen / 16; | ||
1074 | /* Find start of payload */ | ||
1075 | payload_index = (hdrlen + 8); | ||
1076 | /* Calculate MIC */ | ||
1077 | aes128k128d(key, mic_iv, aes_out); | ||
1078 | bitwise_xor(aes_out, mic_header1, chain_buffer); | ||
1079 | aes128k128d(key, chain_buffer, aes_out); | ||
1080 | bitwise_xor(aes_out, mic_header2, chain_buffer); | ||
1081 | aes128k128d(key, chain_buffer, aes_out); | ||
1082 | for (i = 0; i < num_blocks; i++) { | ||
1083 | bitwise_xor(aes_out, &pframe[payload_index], chain_buffer); | ||
1084 | payload_index += 16; | ||
1085 | aes128k128d(key, chain_buffer, aes_out); | ||
1086 | } | ||
1087 | /* Add on the final payload block if it needs padding */ | ||
1088 | if (payload_remainder > 0) { | ||
1089 | for (j = 0; j < 16; j++) | ||
1090 | padded_buffer[j] = 0x00; | ||
1091 | for (j = 0; j < payload_remainder; j++) | ||
1092 | padded_buffer[j] = pframe[payload_index++]; | ||
1093 | bitwise_xor(aes_out, padded_buffer, chain_buffer); | ||
1094 | aes128k128d(key, chain_buffer, aes_out); | ||
1095 | } | ||
1096 | for (j = 0; j < 8; j++) | ||
1097 | mic[j] = aes_out[j]; | ||
1098 | /* Insert MIC into payload */ | ||
1099 | for (j = 0; j < 8; j++) | ||
1100 | pframe[payload_index+j] = mic[j]; | ||
1101 | payload_index = hdrlen + 8; | ||
1102 | for (i = 0; i < num_blocks; i++) { | ||
1103 | construct_ctr_preload(ctr_preload, a4_exists, qc_exists, | ||
1104 | pframe, pn_vector, i + 1); | ||
1105 | aes128k128d(key, ctr_preload, aes_out); | ||
1106 | bitwise_xor(aes_out, &pframe[payload_index], chain_buffer); | ||
1107 | for (j = 0; j < 16; j++) | ||
1108 | pframe[payload_index++] = chain_buffer[j]; | ||
1109 | } | ||
1110 | if (payload_remainder > 0) { /* If short final block, then pad it,*/ | ||
1111 | /* encrypt and copy unpadded part back */ | ||
1112 | construct_ctr_preload(ctr_preload, a4_exists, qc_exists, | ||
1113 | pframe, pn_vector, num_blocks+1); | ||
1114 | for (j = 0; j < 16; j++) | ||
1115 | padded_buffer[j] = 0x00; | ||
1116 | for (j = 0; j < payload_remainder; j++) | ||
1117 | padded_buffer[j] = pframe[payload_index+j]; | ||
1118 | aes128k128d(key, ctr_preload, aes_out); | ||
1119 | bitwise_xor(aes_out, padded_buffer, chain_buffer); | ||
1120 | for (j = 0; j < payload_remainder; j++) | ||
1121 | pframe[payload_index++] = chain_buffer[j]; | ||
1122 | } | ||
1123 | /* Encrypt the MIC */ | ||
1124 | construct_ctr_preload(ctr_preload, a4_exists, qc_exists, | ||
1125 | pframe, pn_vector, 0); | ||
1126 | for (j = 0; j < 16; j++) | ||
1127 | padded_buffer[j] = 0x00; | ||
1128 | for (j = 0; j < 8; j++) | ||
1129 | padded_buffer[j] = pframe[j+hdrlen+8+plen]; | ||
1130 | aes128k128d(key, ctr_preload, aes_out); | ||
1131 | bitwise_xor(aes_out, padded_buffer, chain_buffer); | ||
1132 | for (j = 0; j < 8; j++) | ||
1133 | pframe[payload_index++] = chain_buffer[j]; | ||
1134 | return _SUCCESS; | ||
1135 | } | ||
1136 | |||
1137 | u32 r8712_aes_encrypt(struct _adapter *padapter, u8 *pxmitframe) | ||
1138 | { /* exclude ICV */ | ||
1139 | /* Intermediate Buffers */ | ||
1140 | sint curfragnum, length; | ||
1141 | u32 prwskeylen; | ||
1142 | u8 *pframe, *prwskey; | ||
1143 | struct sta_info *stainfo; | ||
1144 | struct pkt_attrib *pattrib = &((struct xmit_frame *) | ||
1145 | pxmitframe)->attrib; | ||
1146 | struct xmit_priv *pxmitpriv = &padapter->xmitpriv; | ||
1147 | u32 res = _SUCCESS; | ||
1148 | |||
1149 | if (((struct xmit_frame *)pxmitframe)->buf_addr == NULL) | ||
1150 | return _FAIL; | ||
1151 | pframe = ((struct xmit_frame *)pxmitframe)->buf_addr + TXDESC_OFFSET; | ||
1152 | /* 4 start to encrypt each fragment */ | ||
1153 | if ((pattrib->encrypt == _AES_)) { | ||
1154 | if (pattrib->psta) | ||
1155 | stainfo = pattrib->psta; | ||
1156 | else | ||
1157 | stainfo = r8712_get_stainfo(&padapter->stapriv, | ||
1158 | &pattrib->ra[0]); | ||
1159 | if (stainfo != NULL) { | ||
1160 | prwskey = &stainfo->x_UncstKey.skey[0]; | ||
1161 | prwskeylen = 16; | ||
1162 | for (curfragnum = 0; curfragnum < pattrib->nr_frags; | ||
1163 | curfragnum++) { | ||
1164 | if ((curfragnum + 1) == pattrib->nr_frags) {\ | ||
1165 | length = pattrib->last_txcmdsz - | ||
1166 | pattrib->hdrlen - | ||
1167 | pattrib->iv_len - | ||
1168 | pattrib->icv_len; | ||
1169 | aes_cipher(prwskey, pattrib-> | ||
1170 | hdrlen, pframe, length); | ||
1171 | } else { | ||
1172 | length = pxmitpriv->frag_len - | ||
1173 | pattrib->hdrlen - | ||
1174 | pattrib->iv_len - | ||
1175 | pattrib->icv_len ; | ||
1176 | aes_cipher(prwskey, pattrib-> | ||
1177 | hdrlen, pframe, length); | ||
1178 | pframe += pxmitpriv->frag_len; | ||
1179 | pframe = (u8 *)RND4((addr_t)(pframe)); | ||
1180 | } | ||
1181 | } | ||
1182 | } else | ||
1183 | res = _FAIL; | ||
1184 | } | ||
1185 | return res; | ||
1186 | } | ||
1187 | |||
1188 | static sint aes_decipher(u8 *key, uint hdrlen, | ||
1189 | u8 *pframe, uint plen) | ||
1190 | { | ||
1191 | static u8 message[MAX_MSG_SIZE]; | ||
1192 | uint qc_exists, a4_exists, i, j, payload_remainder; | ||
1193 | uint num_blocks, payload_index; | ||
1194 | u8 pn_vector[6]; | ||
1195 | u8 mic_iv[16]; | ||
1196 | u8 mic_header1[16]; | ||
1197 | u8 mic_header2[16]; | ||
1198 | u8 ctr_preload[16]; | ||
1199 | /* Intermediate Buffers */ | ||
1200 | u8 chain_buffer[16]; | ||
1201 | u8 aes_out[16]; | ||
1202 | u8 padded_buffer[16]; | ||
1203 | u8 mic[8]; | ||
1204 | uint frtype = GetFrameType(pframe); | ||
1205 | uint frsubtype = GetFrameSubType(pframe); | ||
1206 | |||
1207 | frsubtype = frsubtype >> 4; | ||
1208 | memset((void *)mic_iv, 0, 16); | ||
1209 | memset((void *)mic_header1, 0, 16); | ||
1210 | memset((void *)mic_header2, 0, 16); | ||
1211 | memset((void *)ctr_preload, 0, 16); | ||
1212 | memset((void *)chain_buffer, 0, 16); | ||
1213 | memset((void *)aes_out, 0, 16); | ||
1214 | memset((void *)padded_buffer, 0, 16); | ||
1215 | /* start to decrypt the payload */ | ||
1216 | /*(plen including llc, payload and mic) */ | ||
1217 | num_blocks = (plen - 8) / 16; | ||
1218 | payload_remainder = (plen-8) % 16; | ||
1219 | pn_vector[0] = pframe[hdrlen]; | ||
1220 | pn_vector[1] = pframe[hdrlen+1]; | ||
1221 | pn_vector[2] = pframe[hdrlen+4]; | ||
1222 | pn_vector[3] = pframe[hdrlen+5]; | ||
1223 | pn_vector[4] = pframe[hdrlen+6]; | ||
1224 | pn_vector[5] = pframe[hdrlen+7]; | ||
1225 | if ((hdrlen == WLAN_HDR_A3_LEN) || (hdrlen == WLAN_HDR_A3_QOS_LEN)) | ||
1226 | a4_exists = 0; | ||
1227 | else | ||
1228 | a4_exists = 1; | ||
1229 | if ((frtype == WIFI_DATA_CFACK) || | ||
1230 | (frtype == WIFI_DATA_CFPOLL) || | ||
1231 | (frtype == WIFI_DATA_CFACKPOLL)) { | ||
1232 | qc_exists = 1; | ||
1233 | if (hdrlen != WLAN_HDR_A3_QOS_LEN) | ||
1234 | hdrlen += 2; | ||
1235 | } else if ((frsubtype == 0x08) || | ||
1236 | (frsubtype == 0x09) || | ||
1237 | (frsubtype == 0x0a) || | ||
1238 | (frsubtype == 0x0b)) { | ||
1239 | if (hdrlen != WLAN_HDR_A3_QOS_LEN) | ||
1240 | hdrlen += 2; | ||
1241 | qc_exists = 1; | ||
1242 | } else | ||
1243 | qc_exists = 0; | ||
1244 | /* now, decrypt pframe with hdrlen offset and plen long */ | ||
1245 | payload_index = hdrlen + 8; /* 8 is for extiv */ | ||
1246 | for (i = 0; i < num_blocks; i++) { | ||
1247 | construct_ctr_preload(ctr_preload, a4_exists, qc_exists, | ||
1248 | pframe, pn_vector, i + 1); | ||
1249 | aes128k128d(key, ctr_preload, aes_out); | ||
1250 | bitwise_xor(aes_out, &pframe[payload_index], chain_buffer); | ||
1251 | for (j = 0; j < 16; j++) | ||
1252 | pframe[payload_index++] = chain_buffer[j]; | ||
1253 | } | ||
1254 | if (payload_remainder > 0) { /* If short final block, pad it,*/ | ||
1255 | /* encrypt it and copy the unpadded part back */ | ||
1256 | construct_ctr_preload(ctr_preload, a4_exists, qc_exists, | ||
1257 | pframe, pn_vector, num_blocks+1); | ||
1258 | for (j = 0; j < 16; j++) | ||
1259 | padded_buffer[j] = 0x00; | ||
1260 | for (j = 0; j < payload_remainder; j++) | ||
1261 | padded_buffer[j] = pframe[payload_index + j]; | ||
1262 | aes128k128d(key, ctr_preload, aes_out); | ||
1263 | bitwise_xor(aes_out, padded_buffer, chain_buffer); | ||
1264 | for (j = 0; j < payload_remainder; j++) | ||
1265 | pframe[payload_index++] = chain_buffer[j]; | ||
1266 | } | ||
1267 | /* start to calculate the mic */ | ||
1268 | memcpy((void *)message, pframe, (hdrlen + plen + 8)); | ||
1269 | pn_vector[0] = pframe[hdrlen]; | ||
1270 | pn_vector[1] = pframe[hdrlen+1]; | ||
1271 | pn_vector[2] = pframe[hdrlen+4]; | ||
1272 | pn_vector[3] = pframe[hdrlen+5]; | ||
1273 | pn_vector[4] = pframe[hdrlen+6]; | ||
1274 | pn_vector[5] = pframe[hdrlen+7]; | ||
1275 | construct_mic_iv(mic_iv, qc_exists, a4_exists, message, plen-8, | ||
1276 | pn_vector); | ||
1277 | construct_mic_header1(mic_header1, hdrlen, message); | ||
1278 | construct_mic_header2(mic_header2, message, a4_exists, qc_exists); | ||
1279 | payload_remainder = (plen - 8) % 16; | ||
1280 | num_blocks = (plen - 8) / 16; | ||
1281 | /* Find start of payload */ | ||
1282 | payload_index = (hdrlen + 8); | ||
1283 | /* Calculate MIC */ | ||
1284 | aes128k128d(key, mic_iv, aes_out); | ||
1285 | bitwise_xor(aes_out, mic_header1, chain_buffer); | ||
1286 | aes128k128d(key, chain_buffer, aes_out); | ||
1287 | bitwise_xor(aes_out, mic_header2, chain_buffer); | ||
1288 | aes128k128d(key, chain_buffer, aes_out); | ||
1289 | for (i = 0; i < num_blocks; i++) { | ||
1290 | bitwise_xor(aes_out, &message[payload_index], chain_buffer); | ||
1291 | payload_index += 16; | ||
1292 | aes128k128d(key, chain_buffer, aes_out); | ||
1293 | } | ||
1294 | /* Add on the final payload block if it needs padding */ | ||
1295 | if (payload_remainder > 0) { | ||
1296 | for (j = 0; j < 16; j++) | ||
1297 | padded_buffer[j] = 0x00; | ||
1298 | for (j = 0; j < payload_remainder; j++) | ||
1299 | padded_buffer[j] = message[payload_index++]; | ||
1300 | bitwise_xor(aes_out, padded_buffer, chain_buffer); | ||
1301 | aes128k128d(key, chain_buffer, aes_out); | ||
1302 | } | ||
1303 | for (j = 0 ; j < 8; j++) | ||
1304 | mic[j] = aes_out[j]; | ||
1305 | /* Insert MIC into payload */ | ||
1306 | for (j = 0; j < 8; j++) | ||
1307 | message[payload_index+j] = mic[j]; | ||
1308 | payload_index = hdrlen + 8; | ||
1309 | for (i = 0; i < num_blocks; i++) { | ||
1310 | construct_ctr_preload(ctr_preload, a4_exists, qc_exists, | ||
1311 | message, pn_vector, i + 1); | ||
1312 | aes128k128d(key, ctr_preload, aes_out); | ||
1313 | bitwise_xor(aes_out, &message[payload_index], chain_buffer); | ||
1314 | for (j = 0; j < 16; j++) | ||
1315 | message[payload_index++] = chain_buffer[j]; | ||
1316 | } | ||
1317 | if (payload_remainder > 0) { /* If short final block, pad it,*/ | ||
1318 | /* encrypt and copy unpadded part back */ | ||
1319 | construct_ctr_preload(ctr_preload, a4_exists, qc_exists, | ||
1320 | message, pn_vector, num_blocks+1); | ||
1321 | for (j = 0; j < 16; j++) | ||
1322 | padded_buffer[j] = 0x00; | ||
1323 | for (j = 0; j < payload_remainder; j++) | ||
1324 | padded_buffer[j] = message[payload_index + j]; | ||
1325 | aes128k128d(key, ctr_preload, aes_out); | ||
1326 | bitwise_xor(aes_out, padded_buffer, chain_buffer); | ||
1327 | for (j = 0; j < payload_remainder; j++) | ||
1328 | message[payload_index++] = chain_buffer[j]; | ||
1329 | } | ||
1330 | /* Encrypt the MIC */ | ||
1331 | construct_ctr_preload(ctr_preload, a4_exists, qc_exists, message, | ||
1332 | pn_vector, 0); | ||
1333 | for (j = 0; j < 16; j++) | ||
1334 | padded_buffer[j] = 0x00; | ||
1335 | for (j = 0; j < 8; j++) | ||
1336 | padded_buffer[j] = message[j + hdrlen + plen]; | ||
1337 | aes128k128d(key, ctr_preload, aes_out); | ||
1338 | bitwise_xor(aes_out, padded_buffer, chain_buffer); | ||
1339 | for (j = 0; j < 8; j++) | ||
1340 | message[payload_index++] = chain_buffer[j]; | ||
1341 | /* compare the mic */ | ||
1342 | return _SUCCESS; | ||
1343 | } | ||
1344 | |||
1345 | u32 r8712_aes_decrypt(struct _adapter *padapter, u8 *precvframe) | ||
1346 | { /* exclude ICV */ | ||
1347 | /* Intermediate Buffers */ | ||
1348 | sint length; | ||
1349 | u32 prwskeylen; | ||
1350 | u8 *pframe, *prwskey, *iv, idx; | ||
1351 | struct sta_info *stainfo; | ||
1352 | struct rx_pkt_attrib *prxattrib = &((union recv_frame *) | ||
1353 | precvframe)->u.hdr.attrib; | ||
1354 | struct security_priv *psecuritypriv = &padapter->securitypriv; | ||
1355 | |||
1356 | pframe = (unsigned char *)((union recv_frame*)precvframe)-> | ||
1357 | u.hdr.rx_data; | ||
1358 | /* 4 start to encrypt each fragment */ | ||
1359 | if ((prxattrib->encrypt == _AES_)) { | ||
1360 | stainfo = r8712_get_stainfo(&padapter->stapriv, | ||
1361 | &prxattrib->ta[0]); | ||
1362 | if (stainfo != NULL) { | ||
1363 | if (IS_MCAST(prxattrib->ra)) { | ||
1364 | iv = pframe+prxattrib->hdrlen; | ||
1365 | idx = iv[3]; | ||
1366 | prwskey = &psecuritypriv->XGrpKey[ | ||
1367 | ((idx >> 6) & 0x3) - 1].skey[0]; | ||
1368 | if (psecuritypriv->binstallGrpkey == false) | ||
1369 | return _FAIL; | ||
1370 | |||
1371 | } else | ||
1372 | prwskey = &stainfo->x_UncstKey.skey[0]; | ||
1373 | prwskeylen = 16; | ||
1374 | length = ((union recv_frame *)precvframe)-> | ||
1375 | u.hdr.len-prxattrib->hdrlen-prxattrib->iv_len; | ||
1376 | aes_decipher(prwskey, prxattrib->hdrlen, pframe, | ||
1377 | length); | ||
1378 | } else | ||
1379 | return _FAIL; | ||
1380 | } | ||
1381 | return _SUCCESS; | ||
1382 | } | ||
1383 | |||
1384 | void r8712_use_tkipkey_handler(void *FunctionContext) | ||
1385 | { | ||
1386 | struct _adapter *padapter = (struct _adapter *)FunctionContext; | ||
1387 | |||
1388 | padapter->securitypriv.busetkipkey = true; | ||
1389 | } | ||