Larry Finger | 5e93f35 | 2014-03-28 21:37:38 -0500 | [diff] [blame] | 1 | /****************************************************************************** |
| 2 | * |
| 3 | * Copyright(c) 2007 - 2011 Realtek Corporation. All rights reserved. |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of version 2 of the GNU General Public License as |
| 7 | * published by the Free Software Foundation. |
| 8 | * |
| 9 | * This program is distributed in the hope that it will be useful, but WITHOUT |
| 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| 12 | * more details. |
| 13 | * |
| 14 | ******************************************************************************/ |
| 15 | #define _RTW_SECURITY_C_ |
| 16 | |
| 17 | #include <osdep_service.h> |
| 18 | #include <drv_types.h> |
| 19 | #include <wifi.h> |
| 20 | #include <osdep_intf.h> |
| 21 | |
| 22 | /* WEP related ===== */ |
| 23 | |
| 24 | #define CRC32_POLY 0x04c11db7 |
| 25 | |
Greg Donald | 8ce6b2d | 2014-10-03 10:36:40 -0500 | [diff] [blame] | 26 | struct arc4context { |
Larry Finger | 5e93f35 | 2014-03-28 21:37:38 -0500 | [diff] [blame] | 27 | u32 x; |
| 28 | u32 y; |
| 29 | u8 state[256]; |
| 30 | }; |
| 31 | |
Greg Donald | 8e3d161 | 2014-10-02 18:28:41 -0500 | [diff] [blame] | 32 | static void arcfour_init(struct arc4context *parc4ctx, u8 *key, u32 key_len) |
Larry Finger | 5e93f35 | 2014-03-28 21:37:38 -0500 | [diff] [blame] | 33 | { |
| 34 | u32 t, u; |
| 35 | u32 keyindex; |
| 36 | u32 stateindex; |
Greg Donald | 8e3d161 | 2014-10-02 18:28:41 -0500 | [diff] [blame] | 37 | u8 *state; |
Larry Finger | 5e93f35 | 2014-03-28 21:37:38 -0500 | [diff] [blame] | 38 | u32 counter; |
| 39 | |
| 40 | state = parc4ctx->state; |
| 41 | parc4ctx->x = 0; |
| 42 | parc4ctx->y = 0; |
| 43 | for (counter = 0; counter < 256; counter++) |
| 44 | state[counter] = (u8)counter; |
| 45 | keyindex = 0; |
| 46 | stateindex = 0; |
Tina Ruchandani | 5db8bee | 2014-10-23 20:17:20 -0700 | [diff] [blame] | 47 | for (counter = 0; counter < 256; counter++) { |
Larry Finger | 5e93f35 | 2014-03-28 21:37:38 -0500 | [diff] [blame] | 48 | t = state[counter]; |
| 49 | stateindex = (stateindex + key[keyindex] + t) & 0xff; |
| 50 | u = state[stateindex]; |
| 51 | state[stateindex] = (u8)t; |
| 52 | state[counter] = (u8)u; |
| 53 | if (++keyindex >= key_len) |
| 54 | keyindex = 0; |
| 55 | } |
| 56 | |
| 57 | } |
| 58 | static u32 arcfour_byte( struct arc4context *parc4ctx) |
| 59 | { |
| 60 | u32 x; |
| 61 | u32 y; |
| 62 | u32 sx, sy; |
Greg Donald | 8e3d161 | 2014-10-02 18:28:41 -0500 | [diff] [blame] | 63 | u8 *state; |
Larry Finger | 5e93f35 | 2014-03-28 21:37:38 -0500 | [diff] [blame] | 64 | |
| 65 | state = parc4ctx->state; |
| 66 | x = (parc4ctx->x + 1) & 0xff; |
| 67 | sx = state[x]; |
| 68 | y = (sx + parc4ctx->y) & 0xff; |
| 69 | sy = state[y]; |
| 70 | parc4ctx->x = x; |
| 71 | parc4ctx->y = y; |
| 72 | state[y] = (u8)sx; |
| 73 | state[x] = (u8)sy; |
| 74 | |
| 75 | return state[(sx + sy) & 0xff]; |
| 76 | } |
| 77 | |
| 78 | static void arcfour_encrypt( struct arc4context *parc4ctx, |
Greg Donald | 8e3d161 | 2014-10-02 18:28:41 -0500 | [diff] [blame] | 79 | u8 *dest, |
| 80 | u8 *src, |
Larry Finger | 5e93f35 | 2014-03-28 21:37:38 -0500 | [diff] [blame] | 81 | u32 len) |
| 82 | { |
| 83 | u32 i; |
| 84 | |
| 85 | for (i = 0; i < len; i++) |
| 86 | dest[i] = src[i] ^ (unsigned char)arcfour_byte(parc4ctx); |
| 87 | |
| 88 | } |
| 89 | |
| 90 | static int bcrc32initialized = 0; |
| 91 | static u32 crc32_table[256]; |
| 92 | |
| 93 | static u8 crc32_reverseBit(u8 data) |
| 94 | { |
| 95 | u8 retval = ((data << 7) & 0x80) | ((data << 5) & 0x40) | |
| 96 | ((data << 3) & 0x20) | ((data << 1) & 0x10) | |
| 97 | ((data >> 1) & 0x08) | ((data >> 3) & 0x04) | |
| 98 | ((data >> 5) & 0x02) | ((data >> 7) & 0x01); |
| 99 | return retval; |
| 100 | } |
| 101 | |
| 102 | static void crc32_init(void) |
| 103 | { |
| 104 | |
| 105 | if (bcrc32initialized == 1) |
| 106 | return; |
| 107 | else{ |
| 108 | int i, j; |
| 109 | u32 c; |
| 110 | u8 *p = (u8 *)&c, *p1; |
| 111 | u8 k; |
| 112 | |
| 113 | c = 0x12340000; |
| 114 | |
Tina Ruchandani | 5db8bee | 2014-10-23 20:17:20 -0700 | [diff] [blame] | 115 | for (i = 0; i < 256; ++i) { |
Larry Finger | 5e93f35 | 2014-03-28 21:37:38 -0500 | [diff] [blame] | 116 | k = crc32_reverseBit((u8)i); |
| 117 | for (c = ((u32)k) << 24, j = 8; j > 0; --j) { |
| 118 | c = c & 0x80000000 ? (c << 1) ^ CRC32_POLY : (c << 1); |
| 119 | } |
| 120 | p1 = (u8 *)&crc32_table[i]; |
| 121 | |
| 122 | p1[0] = crc32_reverseBit(p[3]); |
| 123 | p1[1] = crc32_reverseBit(p[2]); |
| 124 | p1[2] = crc32_reverseBit(p[1]); |
| 125 | p1[3] = crc32_reverseBit(p[0]); |
| 126 | } |
| 127 | bcrc32initialized = 1; |
| 128 | } |
| 129 | } |
| 130 | |
| 131 | static u32 getcrc32(u8 *buf, int len) |
| 132 | { |
| 133 | u8 *p; |
| 134 | u32 crc; |
| 135 | |
| 136 | if (bcrc32initialized == 0) crc32_init(); |
| 137 | |
| 138 | crc = 0xffffffff; /* preload shift register, per CRC-32 spec */ |
| 139 | |
| 140 | for (p = buf; len > 0; ++p, --len) |
| 141 | crc = crc32_table[ (crc ^ *p) & 0xff] ^ (crc >> 8); |
| 142 | |
| 143 | return ~crc; /* transmit complement, per CRC-32 spec */ |
| 144 | } |
| 145 | |
| 146 | /* Need to consider the fragment situation */ |
| 147 | void rtw_wep_encrypt23a(struct rtw_adapter *padapter, |
| 148 | struct xmit_frame *pxmitframe) |
| 149 | { |
| 150 | /* exclude ICV */ |
| 151 | unsigned char crc[4]; |
| 152 | struct arc4context mycontext; |
| 153 | int curfragnum, length, index; |
| 154 | u32 keylength; |
| 155 | u8 *pframe, *payload, *iv; /* wepkey */ |
| 156 | u8 wepkey[16]; |
| 157 | u8 hw_hdr_offset = 0; |
| 158 | struct pkt_attrib *pattrib = &pxmitframe->attrib; |
| 159 | struct security_priv *psecuritypriv = &padapter->securitypriv; |
| 160 | struct xmit_priv *pxmitpriv = &padapter->xmitpriv; |
| 161 | |
| 162 | if (!pxmitframe->buf_addr) |
| 163 | return; |
| 164 | |
| 165 | hw_hdr_offset = TXDESC_OFFSET; |
| 166 | |
| 167 | pframe = pxmitframe->buf_addr + hw_hdr_offset; |
| 168 | |
| 169 | /* start to encrypt each fragment */ |
Jes Sorensen | 9e3d6df | 2014-05-21 09:37:34 +0200 | [diff] [blame] | 170 | if (pattrib->encrypt != WLAN_CIPHER_SUITE_WEP40 && |
| 171 | pattrib->encrypt != WLAN_CIPHER_SUITE_WEP104) |
Larry Finger | 5e93f35 | 2014-03-28 21:37:38 -0500 | [diff] [blame] | 172 | return; |
| 173 | |
| 174 | index = psecuritypriv->dot11PrivacyKeyIndex; |
Jes Sorensen | e082790 | 2014-05-21 09:37:35 +0200 | [diff] [blame] | 175 | keylength = psecuritypriv->wep_key[index].keylen; |
Larry Finger | 5e93f35 | 2014-03-28 21:37:38 -0500 | [diff] [blame] | 176 | |
| 177 | for (curfragnum = 0; curfragnum < pattrib->nr_frags ; curfragnum++) { |
| 178 | iv = pframe + pattrib->hdrlen; |
| 179 | memcpy(&wepkey[0], iv, 3); |
Jes Sorensen | e082790 | 2014-05-21 09:37:35 +0200 | [diff] [blame] | 180 | memcpy(&wepkey[3], &psecuritypriv->wep_key[index].key, |
Larry Finger | 5e93f35 | 2014-03-28 21:37:38 -0500 | [diff] [blame] | 181 | keylength); |
| 182 | payload = pframe + pattrib->iv_len + pattrib->hdrlen; |
| 183 | |
| 184 | if ((curfragnum + 1) == pattrib->nr_frags) { |
| 185 | /* the last fragment */ |
| 186 | length = pattrib->last_txcmdsz - pattrib->hdrlen - |
| 187 | pattrib->iv_len- pattrib->icv_len; |
| 188 | |
| 189 | *((u32 *)crc) = cpu_to_le32(getcrc32(payload, length)); |
| 190 | |
| 191 | arcfour_init(&mycontext, wepkey, 3 + keylength); |
| 192 | arcfour_encrypt(&mycontext, payload, payload, length); |
| 193 | arcfour_encrypt(&mycontext, payload + length, crc, 4); |
| 194 | } else { |
| 195 | length = pxmitpriv->frag_len - pattrib->hdrlen - |
| 196 | pattrib->iv_len - pattrib->icv_len; |
| 197 | *((u32 *)crc) = cpu_to_le32(getcrc32(payload, length)); |
| 198 | arcfour_init(&mycontext, wepkey, 3 + keylength); |
| 199 | arcfour_encrypt(&mycontext, payload, payload, length); |
| 200 | arcfour_encrypt(&mycontext, payload + length, crc, 4); |
| 201 | |
| 202 | pframe += pxmitpriv->frag_len; |
Larry Finger | c17416e | 2014-03-28 21:37:42 -0500 | [diff] [blame] | 203 | pframe = PTR_ALIGN(pframe, 4); |
Larry Finger | 5e93f35 | 2014-03-28 21:37:38 -0500 | [diff] [blame] | 204 | } |
| 205 | } |
| 206 | |
| 207 | } |
| 208 | |
| 209 | void rtw_wep_decrypt23a(struct rtw_adapter *padapter, |
| 210 | struct recv_frame *precvframe) |
| 211 | { |
| 212 | /* exclude ICV */ |
| 213 | u8 crc[4]; |
| 214 | struct arc4context mycontext; |
| 215 | int length; |
| 216 | u32 keylength; |
| 217 | u8 *pframe, *payload, *iv, wepkey[16]; |
| 218 | u8 keyindex; |
| 219 | struct rx_pkt_attrib *prxattrib = &precvframe->attrib; |
| 220 | struct security_priv *psecuritypriv = &padapter->securitypriv; |
Greg Donald | 8e3d161 | 2014-10-02 18:28:41 -0500 | [diff] [blame] | 221 | struct sk_buff *skb = precvframe->pkt; |
Larry Finger | 5e93f35 | 2014-03-28 21:37:38 -0500 | [diff] [blame] | 222 | |
| 223 | pframe = skb->data; |
| 224 | |
| 225 | /* start to decrypt recvframe */ |
Jes Sorensen | 9e3d6df | 2014-05-21 09:37:34 +0200 | [diff] [blame] | 226 | if (prxattrib->encrypt != WLAN_CIPHER_SUITE_WEP40 && |
| 227 | prxattrib->encrypt != WLAN_CIPHER_SUITE_WEP104) |
Larry Finger | 5e93f35 | 2014-03-28 21:37:38 -0500 | [diff] [blame] | 228 | return; |
| 229 | |
| 230 | iv = pframe + prxattrib->hdrlen; |
| 231 | /* keyindex = (iv[3]&0x3); */ |
| 232 | keyindex = prxattrib->key_index; |
Jes Sorensen | e082790 | 2014-05-21 09:37:35 +0200 | [diff] [blame] | 233 | keylength = psecuritypriv->wep_key[keyindex].keylen; |
Larry Finger | 5e93f35 | 2014-03-28 21:37:38 -0500 | [diff] [blame] | 234 | memcpy(&wepkey[0], iv, 3); |
| 235 | /* memcpy(&wepkey[3], &psecuritypriv->dot11DefKey[psecuritypriv->dot11PrivacyKeyIndex].skey[0], keylength); */ |
Jes Sorensen | e082790 | 2014-05-21 09:37:35 +0200 | [diff] [blame] | 236 | memcpy(&wepkey[3], &psecuritypriv->wep_key[keyindex].key, keylength); |
Larry Finger | 5e93f35 | 2014-03-28 21:37:38 -0500 | [diff] [blame] | 237 | length = skb->len - prxattrib->hdrlen - prxattrib->iv_len; |
| 238 | |
| 239 | payload = pframe + prxattrib->iv_len + prxattrib->hdrlen; |
| 240 | |
| 241 | /* decrypt payload include icv */ |
| 242 | arcfour_init(&mycontext, wepkey, 3 + keylength); |
| 243 | arcfour_encrypt(&mycontext, payload, payload, length); |
| 244 | |
| 245 | /* calculate icv and compare the icv */ |
| 246 | *((u32 *)crc) = le32_to_cpu(getcrc32(payload, length - 4)); |
| 247 | |
| 248 | if (crc[3] != payload[length - 1] || crc[2] != payload[length - 2] || |
Jes Sorensen | e082790 | 2014-05-21 09:37:35 +0200 | [diff] [blame] | 249 | crc[1] != payload[length - 3] || crc[0] != payload[length - 4]) { |
Larry Finger | 5e93f35 | 2014-03-28 21:37:38 -0500 | [diff] [blame] | 250 | RT_TRACE(_module_rtl871x_security_c_, _drv_err_, |
| 251 | ("rtw_wep_decrypt23a:icv error crc[3](%x)!= payload" |
| 252 | "[length-1](%x) || crc[2](%x)!= payload[length-2](%x)" |
| 253 | " || crc[1](%x)!= payload[length-3](%x) || crc[0](%x)" |
| 254 | "!= payload[length-4](%x)\n", |
| 255 | crc[3], payload[length - 1], |
| 256 | crc[2], payload[length - 2], |
| 257 | crc[1], payload[length - 3], |
| 258 | crc[0], payload[length - 4])); |
| 259 | } |
Larry Finger | 5e93f35 | 2014-03-28 21:37:38 -0500 | [diff] [blame] | 260 | } |
| 261 | |
| 262 | /* 3 ===== TKIP related ===== */ |
| 263 | |
Greg Donald | 8e3d161 | 2014-10-02 18:28:41 -0500 | [diff] [blame] | 264 | static u32 secmicgetuint32(u8 *p) |
Larry Finger | 5e93f35 | 2014-03-28 21:37:38 -0500 | [diff] [blame] | 265 | /* Convert from Byte[] to u32 in a portable way */ |
| 266 | { |
| 267 | s32 i; |
| 268 | u32 res = 0; |
| 269 | |
Tina Ruchandani | 5db8bee | 2014-10-23 20:17:20 -0700 | [diff] [blame] | 270 | for (i = 0; i<4; i++) { |
Larry Finger | 5e93f35 | 2014-03-28 21:37:38 -0500 | [diff] [blame] | 271 | res |= ((u32)(*p++)) << (8*i); |
| 272 | } |
| 273 | |
| 274 | return res; |
| 275 | } |
| 276 | |
Greg Donald | 8e3d161 | 2014-10-02 18:28:41 -0500 | [diff] [blame] | 277 | static void secmicputuint32(u8 *p, u32 val) |
Larry Finger | 5e93f35 | 2014-03-28 21:37:38 -0500 | [diff] [blame] | 278 | /* Convert from long to Byte[] in a portable way */ |
| 279 | { |
| 280 | long i; |
| 281 | |
Tina Ruchandani | 5db8bee | 2014-10-23 20:17:20 -0700 | [diff] [blame] | 282 | for (i = 0; i<4; i++) { |
Larry Finger | 5e93f35 | 2014-03-28 21:37:38 -0500 | [diff] [blame] | 283 | *p++ = (u8) (val & 0xff); |
| 284 | val >>= 8; |
| 285 | } |
| 286 | |
| 287 | } |
| 288 | |
| 289 | static void secmicclear(struct mic_data *pmicdata) |
| 290 | { |
| 291 | /* Reset the state to the empty message. */ |
| 292 | |
| 293 | pmicdata->L = pmicdata->K0; |
| 294 | pmicdata->R = pmicdata->K1; |
| 295 | pmicdata->nBytesInM = 0; |
| 296 | pmicdata->M = 0; |
| 297 | |
| 298 | } |
| 299 | |
Greg Donald | 8e3d161 | 2014-10-02 18:28:41 -0500 | [diff] [blame] | 300 | void rtw_secmicsetkey23a(struct mic_data *pmicdata, u8 *key) |
Larry Finger | 5e93f35 | 2014-03-28 21:37:38 -0500 | [diff] [blame] | 301 | { |
| 302 | /* Set the key */ |
| 303 | |
| 304 | pmicdata->K0 = secmicgetuint32(key); |
| 305 | pmicdata->K1 = secmicgetuint32(key + 4); |
| 306 | /* and reset the message */ |
| 307 | secmicclear(pmicdata); |
| 308 | |
| 309 | } |
| 310 | |
| 311 | void rtw_secmicappend23abyte23a(struct mic_data *pmicdata, u8 b) |
| 312 | { |
| 313 | |
| 314 | /* Append the byte to our word-sized buffer */ |
| 315 | pmicdata->M |= ((unsigned long)b) << (8*pmicdata->nBytesInM); |
| 316 | pmicdata->nBytesInM++; |
| 317 | /* Process the word if it is full. */ |
Tina Ruchandani | 5db8bee | 2014-10-23 20:17:20 -0700 | [diff] [blame] | 318 | if (pmicdata->nBytesInM >= 4) { |
Larry Finger | 5e93f35 | 2014-03-28 21:37:38 -0500 | [diff] [blame] | 319 | pmicdata->L ^= pmicdata->M; |
| 320 | pmicdata->R ^= ROL32(pmicdata->L, 17); |
| 321 | pmicdata->L += pmicdata->R; |
| 322 | pmicdata->R ^= ((pmicdata->L & 0xff00ff00) >> 8) | ((pmicdata->L & 0x00ff00ff) << 8); |
| 323 | pmicdata->L += pmicdata->R; |
| 324 | pmicdata->R ^= ROL32(pmicdata->L, 3); |
| 325 | pmicdata->L += pmicdata->R; |
| 326 | pmicdata->R ^= ROR32(pmicdata->L, 2); |
| 327 | pmicdata->L += pmicdata->R; |
| 328 | /* Clear the buffer */ |
| 329 | pmicdata->M = 0; |
| 330 | pmicdata->nBytesInM = 0; |
| 331 | } |
| 332 | |
| 333 | } |
| 334 | |
Greg Donald | 8e3d161 | 2014-10-02 18:28:41 -0500 | [diff] [blame] | 335 | void rtw_secmicappend23a(struct mic_data *pmicdata, u8 *src, u32 nbytes) |
Larry Finger | 5e93f35 | 2014-03-28 21:37:38 -0500 | [diff] [blame] | 336 | { |
| 337 | |
| 338 | /* This is simple */ |
Tina Ruchandani | 5db8bee | 2014-10-23 20:17:20 -0700 | [diff] [blame] | 339 | while(nbytes > 0) { |
Larry Finger | 5e93f35 | 2014-03-28 21:37:38 -0500 | [diff] [blame] | 340 | rtw_secmicappend23abyte23a(pmicdata, *src++); |
| 341 | nbytes--; |
| 342 | } |
| 343 | |
| 344 | } |
| 345 | |
Greg Donald | 8e3d161 | 2014-10-02 18:28:41 -0500 | [diff] [blame] | 346 | void rtw_secgetmic23a(struct mic_data *pmicdata, u8 *dst) |
Larry Finger | 5e93f35 | 2014-03-28 21:37:38 -0500 | [diff] [blame] | 347 | { |
| 348 | |
| 349 | /* Append the minimum padding */ |
| 350 | rtw_secmicappend23abyte23a(pmicdata, 0x5a); |
| 351 | rtw_secmicappend23abyte23a(pmicdata, 0); |
| 352 | rtw_secmicappend23abyte23a(pmicdata, 0); |
| 353 | rtw_secmicappend23abyte23a(pmicdata, 0); |
| 354 | rtw_secmicappend23abyte23a(pmicdata, 0); |
| 355 | /* and then zeroes until the length is a multiple of 4 */ |
Tina Ruchandani | 5db8bee | 2014-10-23 20:17:20 -0700 | [diff] [blame] | 356 | while(pmicdata->nBytesInM != 0) { |
Larry Finger | 5e93f35 | 2014-03-28 21:37:38 -0500 | [diff] [blame] | 357 | rtw_secmicappend23abyte23a(pmicdata, 0); |
| 358 | } |
| 359 | /* The appendByte function has already computed the result. */ |
| 360 | secmicputuint32(dst, pmicdata->L); |
| 361 | secmicputuint32(dst+4, pmicdata->R); |
| 362 | /* Reset to the empty message. */ |
| 363 | secmicclear(pmicdata); |
| 364 | |
| 365 | } |
| 366 | |
Greg Donald | 8e3d161 | 2014-10-02 18:28:41 -0500 | [diff] [blame] | 367 | void rtw_seccalctkipmic23a(u8 *key, u8 *header, u8 *data, u32 data_len, |
| 368 | u8 *mic_code, u8 pri) |
Larry Finger | 5e93f35 | 2014-03-28 21:37:38 -0500 | [diff] [blame] | 369 | { |
| 370 | |
| 371 | struct mic_data micdata; |
| 372 | u8 priority[4]={0x0, 0x0, 0x0, 0x0}; |
| 373 | |
| 374 | rtw_secmicsetkey23a(&micdata, key); |
| 375 | priority[0]= pri; |
| 376 | |
| 377 | /* Michael MIC pseudo header: DA, SA, 3 x 0, Priority */ |
| 378 | if (header[1]&1) { /* ToDS == 1 */ |
| 379 | rtw_secmicappend23a(&micdata, &header[16], 6); /* DA */ |
| 380 | if (header[1]&2) /* From Ds == 1 */ |
| 381 | rtw_secmicappend23a(&micdata, &header[24], 6); |
| 382 | else |
| 383 | rtw_secmicappend23a(&micdata, &header[10], 6); |
| 384 | } |
| 385 | else{ /* ToDS == 0 */ |
| 386 | rtw_secmicappend23a(&micdata, &header[4], 6); /* DA */ |
| 387 | if (header[1]&2) /* From Ds == 1 */ |
| 388 | rtw_secmicappend23a(&micdata, &header[16], 6); |
| 389 | else |
| 390 | rtw_secmicappend23a(&micdata, &header[10], 6); |
| 391 | |
| 392 | } |
| 393 | rtw_secmicappend23a(&micdata, &priority[0], 4); |
| 394 | |
| 395 | rtw_secmicappend23a(&micdata, data, data_len); |
| 396 | |
| 397 | rtw_secgetmic23a(&micdata, mic_code); |
| 398 | |
| 399 | } |
| 400 | |
| 401 | /* macros for extraction/creation of unsigned char/unsigned short values */ |
| 402 | #define RotR1(v16) ((((v16) >> 1) & 0x7FFF) ^ (((v16) & 1) << 15)) |
| 403 | #define Lo8(v16) ((u8)((v16) & 0x00FF)) |
| 404 | #define Hi8(v16) ((u8)(((v16) >> 8) & 0x00FF)) |
| 405 | #define Lo16(v32) ((u16)((v32) & 0xFFFF)) |
| 406 | #define Hi16(v32) ((u16)(((v32) >>16) & 0xFFFF)) |
| 407 | #define Mk16(hi, lo) ((lo) ^ (((u16)(hi)) << 8)) |
| 408 | |
| 409 | /* select the Nth 16-bit word of the temporal key unsigned char array TK[] */ |
| 410 | #define TK16(N) Mk16(tk[2*(N)+1], tk[2*(N)]) |
| 411 | |
| 412 | /* S-box lookup: 16 bits --> 16 bits */ |
| 413 | #define _S_(v16) (Sbox1[0][Lo8(v16)] ^ Sbox1[1][Hi8(v16)]) |
| 414 | |
| 415 | /* fixed algorithm "parameters" */ |
| 416 | #define PHASE1_LOOP_CNT 8 /* this needs to be "big enough" */ |
| 417 | #define TA_SIZE 6 /* 48-bit transmitter address */ |
| 418 | #define TK_SIZE 16 /* 128-bit temporal key */ |
| 419 | #define P1K_SIZE 10 /* 80-bit Phase1 key */ |
| 420 | #define RC4_KEY_SIZE 16 /* 128-bit RC4KEY (104 bits unknown) */ |
| 421 | |
| 422 | /* 2-unsigned char by 2-unsigned char subset of the full AES S-box table */ |
| 423 | static const unsigned short Sbox1[2][256]= /* Sbox for hash (can be in ROM) */ |
| 424 | { { |
| 425 | 0xC6A5, 0xF884, 0xEE99, 0xF68D, 0xFF0D, 0xD6BD, 0xDEB1, 0x9154, |
| 426 | 0x6050, 0x0203, 0xCEA9, 0x567D, 0xE719, 0xB562, 0x4DE6, 0xEC9A, |
| 427 | 0x8F45, 0x1F9D, 0x8940, 0xFA87, 0xEF15, 0xB2EB, 0x8EC9, 0xFB0B, |
| 428 | 0x41EC, 0xB367, 0x5FFD, 0x45EA, 0x23BF, 0x53F7, 0xE496, 0x9B5B, |
| 429 | 0x75C2, 0xE11C, 0x3DAE, 0x4C6A, 0x6C5A, 0x7E41, 0xF502, 0x834F, |
| 430 | 0x685C, 0x51F4, 0xD134, 0xF908, 0xE293, 0xAB73, 0x6253, 0x2A3F, |
| 431 | 0x080C, 0x9552, 0x4665, 0x9D5E, 0x3028, 0x37A1, 0x0A0F, 0x2FB5, |
| 432 | 0x0E09, 0x2436, 0x1B9B, 0xDF3D, 0xCD26, 0x4E69, 0x7FCD, 0xEA9F, |
| 433 | 0x121B, 0x1D9E, 0x5874, 0x342E, 0x362D, 0xDCB2, 0xB4EE, 0x5BFB, |
| 434 | 0xA4F6, 0x764D, 0xB761, 0x7DCE, 0x527B, 0xDD3E, 0x5E71, 0x1397, |
| 435 | 0xA6F5, 0xB968, 0x0000, 0xC12C, 0x4060, 0xE31F, 0x79C8, 0xB6ED, |
| 436 | 0xD4BE, 0x8D46, 0x67D9, 0x724B, 0x94DE, 0x98D4, 0xB0E8, 0x854A, |
| 437 | 0xBB6B, 0xC52A, 0x4FE5, 0xED16, 0x86C5, 0x9AD7, 0x6655, 0x1194, |
| 438 | 0x8ACF, 0xE910, 0x0406, 0xFE81, 0xA0F0, 0x7844, 0x25BA, 0x4BE3, |
| 439 | 0xA2F3, 0x5DFE, 0x80C0, 0x058A, 0x3FAD, 0x21BC, 0x7048, 0xF104, |
| 440 | 0x63DF, 0x77C1, 0xAF75, 0x4263, 0x2030, 0xE51A, 0xFD0E, 0xBF6D, |
| 441 | 0x814C, 0x1814, 0x2635, 0xC32F, 0xBEE1, 0x35A2, 0x88CC, 0x2E39, |
| 442 | 0x9357, 0x55F2, 0xFC82, 0x7A47, 0xC8AC, 0xBAE7, 0x322B, 0xE695, |
| 443 | 0xC0A0, 0x1998, 0x9ED1, 0xA37F, 0x4466, 0x547E, 0x3BAB, 0x0B83, |
| 444 | 0x8CCA, 0xC729, 0x6BD3, 0x283C, 0xA779, 0xBCE2, 0x161D, 0xAD76, |
| 445 | 0xDB3B, 0x6456, 0x744E, 0x141E, 0x92DB, 0x0C0A, 0x486C, 0xB8E4, |
| 446 | 0x9F5D, 0xBD6E, 0x43EF, 0xC4A6, 0x39A8, 0x31A4, 0xD337, 0xF28B, |
| 447 | 0xD532, 0x8B43, 0x6E59, 0xDAB7, 0x018C, 0xB164, 0x9CD2, 0x49E0, |
| 448 | 0xD8B4, 0xACFA, 0xF307, 0xCF25, 0xCAAF, 0xF48E, 0x47E9, 0x1018, |
| 449 | 0x6FD5, 0xF088, 0x4A6F, 0x5C72, 0x3824, 0x57F1, 0x73C7, 0x9751, |
| 450 | 0xCB23, 0xA17C, 0xE89C, 0x3E21, 0x96DD, 0x61DC, 0x0D86, 0x0F85, |
| 451 | 0xE090, 0x7C42, 0x71C4, 0xCCAA, 0x90D8, 0x0605, 0xF701, 0x1C12, |
| 452 | 0xC2A3, 0x6A5F, 0xAEF9, 0x69D0, 0x1791, 0x9958, 0x3A27, 0x27B9, |
| 453 | 0xD938, 0xEB13, 0x2BB3, 0x2233, 0xD2BB, 0xA970, 0x0789, 0x33A7, |
| 454 | 0x2DB6, 0x3C22, 0x1592, 0xC920, 0x8749, 0xAAFF, 0x5078, 0xA57A, |
| 455 | 0x038F, 0x59F8, 0x0980, 0x1A17, 0x65DA, 0xD731, 0x84C6, 0xD0B8, |
| 456 | 0x82C3, 0x29B0, 0x5A77, 0x1E11, 0x7BCB, 0xA8FC, 0x6DD6, 0x2C3A, |
| 457 | }, |
| 458 | |
| 459 | { /* second half of table is unsigned char-reversed version of first! */ |
| 460 | 0xA5C6, 0x84F8, 0x99EE, 0x8DF6, 0x0DFF, 0xBDD6, 0xB1DE, 0x5491, |
| 461 | 0x5060, 0x0302, 0xA9CE, 0x7D56, 0x19E7, 0x62B5, 0xE64D, 0x9AEC, |
| 462 | 0x458F, 0x9D1F, 0x4089, 0x87FA, 0x15EF, 0xEBB2, 0xC98E, 0x0BFB, |
| 463 | 0xEC41, 0x67B3, 0xFD5F, 0xEA45, 0xBF23, 0xF753, 0x96E4, 0x5B9B, |
| 464 | 0xC275, 0x1CE1, 0xAE3D, 0x6A4C, 0x5A6C, 0x417E, 0x02F5, 0x4F83, |
| 465 | 0x5C68, 0xF451, 0x34D1, 0x08F9, 0x93E2, 0x73AB, 0x5362, 0x3F2A, |
| 466 | 0x0C08, 0x5295, 0x6546, 0x5E9D, 0x2830, 0xA137, 0x0F0A, 0xB52F, |
| 467 | 0x090E, 0x3624, 0x9B1B, 0x3DDF, 0x26CD, 0x694E, 0xCD7F, 0x9FEA, |
| 468 | 0x1B12, 0x9E1D, 0x7458, 0x2E34, 0x2D36, 0xB2DC, 0xEEB4, 0xFB5B, |
| 469 | 0xF6A4, 0x4D76, 0x61B7, 0xCE7D, 0x7B52, 0x3EDD, 0x715E, 0x9713, |
| 470 | 0xF5A6, 0x68B9, 0x0000, 0x2CC1, 0x6040, 0x1FE3, 0xC879, 0xEDB6, |
| 471 | 0xBED4, 0x468D, 0xD967, 0x4B72, 0xDE94, 0xD498, 0xE8B0, 0x4A85, |
| 472 | 0x6BBB, 0x2AC5, 0xE54F, 0x16ED, 0xC586, 0xD79A, 0x5566, 0x9411, |
| 473 | 0xCF8A, 0x10E9, 0x0604, 0x81FE, 0xF0A0, 0x4478, 0xBA25, 0xE34B, |
| 474 | 0xF3A2, 0xFE5D, 0xC080, 0x8A05, 0xAD3F, 0xBC21, 0x4870, 0x04F1, |
| 475 | 0xDF63, 0xC177, 0x75AF, 0x6342, 0x3020, 0x1AE5, 0x0EFD, 0x6DBF, |
| 476 | 0x4C81, 0x1418, 0x3526, 0x2FC3, 0xE1BE, 0xA235, 0xCC88, 0x392E, |
| 477 | 0x5793, 0xF255, 0x82FC, 0x477A, 0xACC8, 0xE7BA, 0x2B32, 0x95E6, |
| 478 | 0xA0C0, 0x9819, 0xD19E, 0x7FA3, 0x6644, 0x7E54, 0xAB3B, 0x830B, |
| 479 | 0xCA8C, 0x29C7, 0xD36B, 0x3C28, 0x79A7, 0xE2BC, 0x1D16, 0x76AD, |
| 480 | 0x3BDB, 0x5664, 0x4E74, 0x1E14, 0xDB92, 0x0A0C, 0x6C48, 0xE4B8, |
| 481 | 0x5D9F, 0x6EBD, 0xEF43, 0xA6C4, 0xA839, 0xA431, 0x37D3, 0x8BF2, |
| 482 | 0x32D5, 0x438B, 0x596E, 0xB7DA, 0x8C01, 0x64B1, 0xD29C, 0xE049, |
| 483 | 0xB4D8, 0xFAAC, 0x07F3, 0x25CF, 0xAFCA, 0x8EF4, 0xE947, 0x1810, |
| 484 | 0xD56F, 0x88F0, 0x6F4A, 0x725C, 0x2438, 0xF157, 0xC773, 0x5197, |
| 485 | 0x23CB, 0x7CA1, 0x9CE8, 0x213E, 0xDD96, 0xDC61, 0x860D, 0x850F, |
| 486 | 0x90E0, 0x427C, 0xC471, 0xAACC, 0xD890, 0x0506, 0x01F7, 0x121C, |
| 487 | 0xA3C2, 0x5F6A, 0xF9AE, 0xD069, 0x9117, 0x5899, 0x273A, 0xB927, |
| 488 | 0x38D9, 0x13EB, 0xB32B, 0x3322, 0xBBD2, 0x70A9, 0x8907, 0xA733, |
| 489 | 0xB62D, 0x223C, 0x9215, 0x20C9, 0x4987, 0xFFAA, 0x7850, 0x7AA5, |
| 490 | 0x8F03, 0xF859, 0x8009, 0x171A, 0xDA65, 0x31D7, 0xC684, 0xB8D0, |
| 491 | 0xC382, 0xB029, 0x775A, 0x111E, 0xCB7B, 0xFCA8, 0xD66D, 0x3A2C, |
| 492 | } |
| 493 | }; |
| 494 | |
| 495 | /* |
| 496 | ********************************************************************** |
| 497 | * Routine: Phase 1 -- generate P1K, given TA, TK, IV32 |
| 498 | * |
| 499 | * Inputs: |
| 500 | * tk[] = temporal key [128 bits] |
| 501 | * ta[] = transmitter's MAC address [ 48 bits] |
| 502 | * iv32 = upper 32 bits of IV [ 32 bits] |
| 503 | * Output: |
| 504 | * p1k[] = Phase 1 key [ 80 bits] |
| 505 | * |
| 506 | * Note: |
| 507 | * This function only needs to be called every 2**16 packets, |
| 508 | * although in theory it could be called every packet. |
| 509 | * |
| 510 | ********************************************************************** |
| 511 | */ |
| 512 | static void phase1(u16 *p1k, const u8 *tk, const u8 *ta, u32 iv32) |
| 513 | { |
| 514 | int i; |
| 515 | |
| 516 | /* Initialize the 80 bits of P1K[] from IV32 and TA[0..5] */ |
| 517 | p1k[0] = Lo16(iv32); |
| 518 | p1k[1] = Hi16(iv32); |
| 519 | p1k[2] = Mk16(ta[1], ta[0]); /* use TA[] as little-endian */ |
| 520 | p1k[3] = Mk16(ta[3], ta[2]); |
| 521 | p1k[4] = Mk16(ta[5], ta[4]); |
| 522 | |
| 523 | /* Now compute an unbalanced Feistel cipher with 80-bit block */ |
| 524 | /* size on the 80-bit block P1K[], using the 128-bit key TK[] */ |
Tina Ruchandani | 5db8bee | 2014-10-23 20:17:20 -0700 | [diff] [blame] | 525 | for (i = 0; i < PHASE1_LOOP_CNT ;i++) { |
| 526 | /* Each add operation here is mod 2**16 */ |
Larry Finger | 5e93f35 | 2014-03-28 21:37:38 -0500 | [diff] [blame] | 527 | p1k[0] += _S_(p1k[4] ^ TK16((i&1)+0)); |
| 528 | p1k[1] += _S_(p1k[0] ^ TK16((i&1)+2)); |
| 529 | p1k[2] += _S_(p1k[1] ^ TK16((i&1)+4)); |
| 530 | p1k[3] += _S_(p1k[2] ^ TK16((i&1)+6)); |
| 531 | p1k[4] += _S_(p1k[3] ^ TK16((i&1)+0)); |
| 532 | p1k[4] += (unsigned short)i; /* avoid "slide attacks" */ |
| 533 | } |
| 534 | |
| 535 | } |
| 536 | |
| 537 | /* |
| 538 | ********************************************************************** |
| 539 | * Routine: Phase 2 -- generate RC4KEY, given TK, P1K, IV16 |
| 540 | * |
| 541 | * Inputs: |
| 542 | * tk[] = Temporal key [128 bits] |
| 543 | * p1k[] = Phase 1 output key [ 80 bits] |
| 544 | * iv16 = low 16 bits of IV counter [ 16 bits] |
| 545 | * Output: |
| 546 | * rc4key[] = the key used to encrypt the packet [128 bits] |
| 547 | * |
| 548 | * Note: |
| 549 | * The value {TA, IV32, IV16} for Phase1/Phase2 must be unique |
| 550 | * across all packets using the same key TK value. Then, for a |
| 551 | * given value of TK[], this TKIP48 construction guarantees that |
| 552 | * the final RC4KEY value is unique across all packets. |
| 553 | * |
| 554 | * Suggested implementation optimization: if PPK[] is "overlaid" |
| 555 | * appropriately on RC4KEY[], there is no need for the final |
| 556 | * for loop below that copies the PPK[] result into RC4KEY[]. |
| 557 | * |
| 558 | ********************************************************************** |
| 559 | */ |
| 560 | static void phase2(u8 *rc4key, const u8 *tk, const u16 *p1k, u16 iv16) |
| 561 | { |
| 562 | int i; |
| 563 | u16 PPK[6]; /* temporary key for mixing */ |
| 564 | |
| 565 | /* Note: all adds in the PPK[] equations below are mod 2**16 */ |
| 566 | for (i = 0;i<5;i++) PPK[i]= p1k[i]; /* first, copy P1K to PPK */ |
| 567 | PPK[5] = p1k[4] +iv16; /* next, add in IV16 */ |
| 568 | |
| 569 | /* Bijective non-linear mixing of the 96 bits of PPK[0..5] */ |
| 570 | PPK[0] += _S_(PPK[5] ^ TK16(0)); /* Mix key in each "round" */ |
| 571 | PPK[1] += _S_(PPK[0] ^ TK16(1)); |
| 572 | PPK[2] += _S_(PPK[1] ^ TK16(2)); |
| 573 | PPK[3] += _S_(PPK[2] ^ TK16(3)); |
| 574 | PPK[4] += _S_(PPK[3] ^ TK16(4)); |
| 575 | PPK[5] += _S_(PPK[4] ^ TK16(5)); /* Total # S-box lookups == 6 */ |
| 576 | |
| 577 | /* Final sweep: bijective, "linear". Rotates kill LSB correlations */ |
| 578 | PPK[0] += RotR1(PPK[5] ^ TK16(6)); |
| 579 | PPK[1] += RotR1(PPK[0] ^ TK16(7)); /* Use all of TK[] in Phase2 */ |
| 580 | PPK[2] += RotR1(PPK[1]); |
| 581 | PPK[3] += RotR1(PPK[2]); |
| 582 | PPK[4] += RotR1(PPK[3]); |
| 583 | PPK[5] += RotR1(PPK[4]); |
| 584 | /* Note: At this point, for a given key TK[0..15], the 96-bit output */ |
| 585 | /* value PPK[0..5] is guaranteed to be unique, as a function */ |
| 586 | /* of the 96-bit "input" value {TA, IV32, IV16}. That is, P1K */ |
| 587 | /* is now a keyed permutation of {TA, IV32, IV16}. */ |
| 588 | |
| 589 | /* Set RC4KEY[0..3], which includes "cleartext" portion of RC4 key */ |
| 590 | rc4key[0] = Hi8(iv16); /* RC4KEY[0..2] is the WEP IV */ |
| 591 | rc4key[1] = (Hi8(iv16) | 0x20) & 0x7F; /* Help avoid weak (FMS) keys */ |
| 592 | rc4key[2] = Lo8(iv16); |
| 593 | rc4key[3] = Lo8((PPK[5] ^ TK16(0)) >> 1); |
| 594 | |
| 595 | /* Copy 96 bits of PPK[0..5] to RC4KEY[4..15] (little-endian) */ |
Tina Ruchandani | 5db8bee | 2014-10-23 20:17:20 -0700 | [diff] [blame] | 596 | for (i = 0;i<6;i++) { |
Larry Finger | 5e93f35 | 2014-03-28 21:37:38 -0500 | [diff] [blame] | 597 | rc4key[4+2*i] = Lo8(PPK[i]); |
| 598 | rc4key[5+2*i] = Hi8(PPK[i]); |
| 599 | } |
| 600 | |
| 601 | } |
| 602 | |
| 603 | /* The hlen isn't include the IV */ |
Jes Sorensen | 75f3f03 | 2014-05-16 10:04:37 +0200 | [diff] [blame] | 604 | int rtw_tkip_encrypt23a(struct rtw_adapter *padapter, |
| 605 | struct xmit_frame *pxmitframe) |
| 606 | { |
Larry Finger | 5e93f35 | 2014-03-28 21:37:38 -0500 | [diff] [blame] | 607 | u16 pnl; |
| 608 | u32 pnh; |
| 609 | u8 rc4key[16]; |
| 610 | u8 ttkey[16]; |
| 611 | u8 crc[4]; |
| 612 | u8 hw_hdr_offset = 0; |
| 613 | struct arc4context mycontext; |
| 614 | int curfragnum, length; |
| 615 | u32 prwskeylen; |
Greg Donald | 99dc94f | 2014-09-04 15:49:30 -0500 | [diff] [blame] | 616 | u8 *pframe, *payload, *iv, *prwskey; |
Larry Finger | 5e93f35 | 2014-03-28 21:37:38 -0500 | [diff] [blame] | 617 | union pn48 dot11txpn; |
| 618 | struct sta_info *stainfo; |
| 619 | struct pkt_attrib *pattrib = &pxmitframe->attrib; |
| 620 | struct security_priv *psecuritypriv = &padapter->securitypriv; |
| 621 | struct xmit_priv *pxmitpriv = &padapter->xmitpriv; |
Jes Sorensen | 75f3f03 | 2014-05-16 10:04:37 +0200 | [diff] [blame] | 622 | int res = _SUCCESS; |
Larry Finger | 5e93f35 | 2014-03-28 21:37:38 -0500 | [diff] [blame] | 623 | |
| 624 | if (!pxmitframe->buf_addr) |
| 625 | return _FAIL; |
| 626 | |
| 627 | hw_hdr_offset = TXDESC_OFFSET; |
| 628 | |
| 629 | pframe = pxmitframe->buf_addr + hw_hdr_offset; |
| 630 | /* 4 start to encrypt each fragment */ |
Jes Sorensen | 9e3d6df | 2014-05-21 09:37:34 +0200 | [diff] [blame] | 631 | if (pattrib->encrypt == WLAN_CIPHER_SUITE_TKIP) { |
Larry Finger | 5e93f35 | 2014-03-28 21:37:38 -0500 | [diff] [blame] | 632 | if (pattrib->psta) |
Larry Finger | 5e93f35 | 2014-03-28 21:37:38 -0500 | [diff] [blame] | 633 | stainfo = pattrib->psta; |
Jes Sorensen | 9e3d6df | 2014-05-21 09:37:34 +0200 | [diff] [blame] | 634 | else { |
Larry Finger | 5e93f35 | 2014-03-28 21:37:38 -0500 | [diff] [blame] | 635 | DBG_8723A("%s, call rtw_get_stainfo()\n", __func__); |
| 636 | stainfo = rtw_get_stainfo23a(&padapter->stapriv, |
| 637 | &pattrib->ra[0]); |
| 638 | } |
| 639 | |
| 640 | if (stainfo!= NULL) { |
| 641 | |
Tina Ruchandani | 5db8bee | 2014-10-23 20:17:20 -0700 | [diff] [blame] | 642 | if (!(stainfo->state &_FW_LINKED)) { |
Larry Finger | 5e93f35 | 2014-03-28 21:37:38 -0500 | [diff] [blame] | 643 | DBG_8723A("%s, psta->state(0x%x) != _FW_LINKED\n", __func__, stainfo->state); |
| 644 | return _FAIL; |
| 645 | } |
| 646 | |
| 647 | RT_TRACE(_module_rtl871x_security_c_, _drv_err_, ("rtw_tkip_encrypt23a: stainfo!= NULL!!!\n")); |
| 648 | |
| 649 | if (is_multicast_ether_addr(pattrib->ra)) |
| 650 | prwskey = psecuritypriv->dot118021XGrpKey[psecuritypriv->dot118021XGrpKeyid].skey; |
| 651 | else |
| 652 | prwskey = &stainfo->dot118021x_UncstKey.skey[0]; |
| 653 | |
| 654 | prwskeylen = 16; |
| 655 | |
| 656 | for (curfragnum = 0;curfragnum<pattrib->nr_frags;curfragnum++) { |
| 657 | iv = pframe+pattrib->hdrlen; |
| 658 | payload = pframe+pattrib->iv_len+pattrib->hdrlen; |
| 659 | |
| 660 | GET_TKIP_PN(iv, dot11txpn); |
| 661 | |
| 662 | pnl = (u16)(dot11txpn.val); |
| 663 | pnh = (u32)(dot11txpn.val>>16); |
| 664 | |
| 665 | phase1((u16 *)&ttkey[0], prwskey,&pattrib->ta[0], pnh); |
| 666 | |
| 667 | phase2(&rc4key[0], prwskey, (u16 *)&ttkey[0], pnl); |
| 668 | |
| 669 | if ((curfragnum+1) == pattrib->nr_frags) { /* 4 the last fragment */ |
| 670 | length = pattrib->last_txcmdsz-pattrib->hdrlen-pattrib->iv_len- pattrib->icv_len; |
| 671 | RT_TRACE(_module_rtl871x_security_c_, _drv_info_, ("pattrib->iv_len =%x, pattrib->icv_len =%x\n", pattrib->iv_len, pattrib->icv_len)); |
| 672 | *((u32 *)crc) = cpu_to_le32(getcrc32(payload, length));/* modified by Amy*/ |
| 673 | |
| 674 | arcfour_init(&mycontext, rc4key, 16); |
| 675 | arcfour_encrypt(&mycontext, payload, payload, length); |
| 676 | arcfour_encrypt(&mycontext, payload+length, crc, 4); |
| 677 | |
| 678 | } |
| 679 | else{ |
| 680 | length = pxmitpriv->frag_len-pattrib->hdrlen-pattrib->iv_len-pattrib->icv_len ; |
| 681 | *((u32 *)crc) = cpu_to_le32(getcrc32(payload, length));/* modified by Amy*/ |
| 682 | arcfour_init(&mycontext, rc4key, 16); |
| 683 | arcfour_encrypt(&mycontext, payload, payload, length); |
| 684 | arcfour_encrypt(&mycontext, payload+length, crc, 4); |
| 685 | |
| 686 | pframe+= pxmitpriv->frag_len; |
Larry Finger | c17416e | 2014-03-28 21:37:42 -0500 | [diff] [blame] | 687 | pframe = PTR_ALIGN(pframe, 4); |
Larry Finger | 5e93f35 | 2014-03-28 21:37:38 -0500 | [diff] [blame] | 688 | } |
| 689 | } |
| 690 | |
| 691 | } |
| 692 | else{ |
| 693 | RT_TRACE(_module_rtl871x_security_c_, _drv_err_, ("rtw_tkip_encrypt23a: stainfo == NULL!!!\n")); |
Greg Donald | a82b4b0 | 2014-09-08 20:50:23 -0500 | [diff] [blame] | 694 | DBG_8723A("%s, psta == NUL\n", __func__); |
Larry Finger | 5e93f35 | 2014-03-28 21:37:38 -0500 | [diff] [blame] | 695 | res = _FAIL; |
| 696 | } |
| 697 | |
| 698 | } |
| 699 | |
| 700 | return res; |
| 701 | } |
| 702 | |
| 703 | /* The hlen isn't include the IV */ |
Jes Sorensen | 75f3f03 | 2014-05-16 10:04:37 +0200 | [diff] [blame] | 704 | int rtw_tkip_decrypt23a(struct rtw_adapter *padapter, |
| 705 | struct recv_frame *precvframe) |
Larry Finger | 5e93f35 | 2014-03-28 21:37:38 -0500 | [diff] [blame] | 706 | { |
Larry Finger | 5e93f35 | 2014-03-28 21:37:38 -0500 | [diff] [blame] | 707 | u16 pnl; |
| 708 | u32 pnh; |
| 709 | u8 rc4key[16]; |
| 710 | u8 ttkey[16]; |
| 711 | u8 crc[4]; |
| 712 | struct arc4context mycontext; |
| 713 | int length; |
| 714 | u32 prwskeylen; |
Greg Donald | 99dc94f | 2014-09-04 15:49:30 -0500 | [diff] [blame] | 715 | u8 *pframe, *payload, *iv, *prwskey; |
Larry Finger | 5e93f35 | 2014-03-28 21:37:38 -0500 | [diff] [blame] | 716 | union pn48 dot11txpn; |
| 717 | struct sta_info *stainfo; |
| 718 | struct rx_pkt_attrib *prxattrib = &precvframe->attrib; |
| 719 | struct security_priv *psecuritypriv = &padapter->securitypriv; |
Greg Donald | 8e3d161 | 2014-10-02 18:28:41 -0500 | [diff] [blame] | 720 | struct sk_buff *skb = precvframe->pkt; |
Jes Sorensen | 75f3f03 | 2014-05-16 10:04:37 +0200 | [diff] [blame] | 721 | int res = _SUCCESS; |
Larry Finger | 5e93f35 | 2014-03-28 21:37:38 -0500 | [diff] [blame] | 722 | |
| 723 | pframe = skb->data; |
| 724 | |
| 725 | /* 4 start to decrypt recvframe */ |
Jes Sorensen | 9e3d6df | 2014-05-21 09:37:34 +0200 | [diff] [blame] | 726 | if (prxattrib->encrypt == WLAN_CIPHER_SUITE_TKIP) { |
Larry Finger | 5e93f35 | 2014-03-28 21:37:38 -0500 | [diff] [blame] | 727 | |
| 728 | stainfo = rtw_get_stainfo23a(&padapter->stapriv, |
| 729 | &prxattrib->ta[0]); |
| 730 | if (stainfo!= NULL) { |
| 731 | |
| 732 | if (is_multicast_ether_addr(prxattrib->ra)) { |
Jes Sorensen | 9216c51 | 2014-05-21 09:37:29 +0200 | [diff] [blame] | 733 | if (psecuritypriv->binstallGrpkey == 0) { |
Larry Finger | 5e93f35 | 2014-03-28 21:37:38 -0500 | [diff] [blame] | 734 | res = _FAIL; |
| 735 | DBG_8723A("%s:rx bc/mc packets, but didn't install group key!!!!!!!!!!\n", __func__); |
| 736 | goto exit; |
| 737 | } |
| 738 | prwskey = psecuritypriv->dot118021XGrpKey[prxattrib->key_index].skey; |
| 739 | prwskeylen = 16; |
| 740 | } else { |
| 741 | RT_TRACE(_module_rtl871x_security_c_, _drv_err_, ("rtw_tkip_decrypt23a: stainfo!= NULL!!!\n")); |
| 742 | prwskey = &stainfo->dot118021x_UncstKey.skey[0]; |
| 743 | prwskeylen = 16; |
| 744 | } |
| 745 | |
| 746 | iv = pframe+prxattrib->hdrlen; |
| 747 | payload = pframe+prxattrib->iv_len+prxattrib->hdrlen; |
| 748 | length = skb->len - prxattrib->hdrlen-prxattrib->iv_len; |
| 749 | |
| 750 | GET_TKIP_PN(iv, dot11txpn); |
| 751 | |
| 752 | pnl = (u16)(dot11txpn.val); |
| 753 | pnh = (u32)(dot11txpn.val>>16); |
| 754 | |
| 755 | phase1((u16 *)&ttkey[0], prwskey,&prxattrib->ta[0], pnh); |
| 756 | phase2(&rc4key[0], prwskey, (unsigned short *)&ttkey[0], pnl); |
| 757 | |
| 758 | /* 4 decrypt payload include icv */ |
| 759 | arcfour_init(&mycontext, rc4key, 16); |
| 760 | arcfour_encrypt(&mycontext, payload, payload, length); |
| 761 | |
| 762 | *((u32 *)crc) = le32_to_cpu(getcrc32(payload, length-4)); |
| 763 | |
| 764 | if (crc[3]!= payload[length-1] || crc[2]!= payload[length-2] || crc[1]!= payload[length-3] || crc[0]!= payload[length-4]) |
| 765 | { |
| 766 | RT_TRACE(_module_rtl871x_security_c_, _drv_err_, ("rtw_wep_decrypt23a:icv error crc[3](%x)!= payload[length-1](%x) || crc[2](%x)!= payload[length-2](%x) || crc[1](%x)!= payload[length-3](%x) || crc[0](%x)!= payload[length-4](%x)\n", |
| 767 | crc[3], payload[length-1], crc[2], payload[length-2], crc[1], payload[length-3], crc[0], payload[length-4])); |
| 768 | res = _FAIL; |
| 769 | } |
| 770 | } else { |
| 771 | RT_TRACE(_module_rtl871x_security_c_, _drv_err_, ("rtw_tkip_decrypt23a: stainfo == NULL!!!\n")); |
| 772 | res = _FAIL; |
| 773 | } |
| 774 | } |
| 775 | exit: |
| 776 | return res; |
| 777 | } |
| 778 | |
| 779 | /* 3 ===== AES related ===== */ |
| 780 | |
| 781 | #define MAX_MSG_SIZE 2048 |
| 782 | /*****************************/ |
| 783 | /******** SBOX Table *********/ |
| 784 | /*****************************/ |
| 785 | |
| 786 | static u8 sbox_table[256] = { |
| 787 | 0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5, |
| 788 | 0x30, 0x01, 0x67, 0x2b, 0xfe, 0xd7, 0xab, 0x76, |
| 789 | 0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0, |
| 790 | 0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0, |
| 791 | 0xb7, 0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7, 0xcc, |
| 792 | 0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15, |
| 793 | 0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a, |
| 794 | 0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75, |
| 795 | 0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0, |
| 796 | 0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84, |
| 797 | 0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b, |
| 798 | 0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf, |
| 799 | 0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85, |
| 800 | 0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c, 0x9f, 0xa8, |
| 801 | 0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5, |
| 802 | 0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2, |
| 803 | 0xcd, 0x0c, 0x13, 0xec, 0x5f, 0x97, 0x44, 0x17, |
| 804 | 0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73, |
| 805 | 0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88, |
| 806 | 0x46, 0xee, 0xb8, 0x14, 0xde, 0x5e, 0x0b, 0xdb, |
| 807 | 0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c, |
| 808 | 0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79, |
| 809 | 0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5, 0x4e, 0xa9, |
| 810 | 0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08, |
| 811 | 0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6, |
| 812 | 0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a, |
| 813 | 0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e, |
| 814 | 0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e, |
| 815 | 0xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9, 0x8e, 0x94, |
| 816 | 0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf, |
| 817 | 0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68, |
| 818 | 0x41, 0x99, 0x2d, 0x0f, 0xb0, 0x54, 0xbb, 0x16 |
| 819 | }; |
| 820 | |
| 821 | /*****************************/ |
| 822 | /**** Function Prototypes ****/ |
| 823 | /*****************************/ |
| 824 | |
| 825 | static void construct_mic_header2(u8 *mic_header2, u8 *mpdu, int a4_exists, |
| 826 | int qc_exists); |
| 827 | |
| 828 | static void xor_128(u8 *a, u8 *b, u8 *out) |
| 829 | { |
| 830 | int i; |
| 831 | |
| 832 | for (i = 0;i<16; i++) |
| 833 | out[i] = a[i] ^ b[i]; |
| 834 | } |
| 835 | |
| 836 | static void xor_32(u8 *a, u8 *b, u8 *out) |
| 837 | { |
| 838 | int i; |
| 839 | |
| 840 | for (i = 0; i < 4; i++) |
| 841 | out[i] = a[i] ^ b[i]; |
| 842 | } |
| 843 | |
| 844 | static u8 sbox(u8 a) |
| 845 | { |
| 846 | return sbox_table[(int)a]; |
| 847 | } |
| 848 | |
| 849 | static void next_key(u8 *key, int round) |
| 850 | { |
| 851 | u8 rcon; |
| 852 | u8 sbox_key[4]; |
| 853 | u8 rcon_table[12] = |
| 854 | { |
| 855 | 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, |
| 856 | 0x1b, 0x36, 0x36, 0x36 |
| 857 | }; |
| 858 | |
| 859 | sbox_key[0] = sbox(key[13]); |
| 860 | sbox_key[1] = sbox(key[14]); |
| 861 | sbox_key[2] = sbox(key[15]); |
| 862 | sbox_key[3] = sbox(key[12]); |
| 863 | |
| 864 | rcon = rcon_table[round]; |
| 865 | |
| 866 | xor_32(&key[0], sbox_key, &key[0]); |
| 867 | key[0] = key[0] ^ rcon; |
| 868 | |
| 869 | xor_32(&key[4], &key[0], &key[4]); |
| 870 | xor_32(&key[8], &key[4], &key[8]); |
| 871 | xor_32(&key[12], &key[8], &key[12]); |
| 872 | |
| 873 | } |
| 874 | |
| 875 | static void byte_sub(u8 *in, u8 *out) |
| 876 | { |
| 877 | int i; |
| 878 | |
Tina Ruchandani | 5db8bee | 2014-10-23 20:17:20 -0700 | [diff] [blame] | 879 | for (i = 0; i< 16; i++) { |
Larry Finger | 5e93f35 | 2014-03-28 21:37:38 -0500 | [diff] [blame] | 880 | out[i] = sbox(in[i]); |
| 881 | } |
| 882 | |
| 883 | } |
| 884 | |
| 885 | static void shift_row(u8 *in, u8 *out) |
| 886 | { |
| 887 | |
| 888 | out[0] = in[0]; |
| 889 | out[1] = in[5]; |
| 890 | out[2] = in[10]; |
| 891 | out[3] = in[15]; |
| 892 | out[4] = in[4]; |
| 893 | out[5] = in[9]; |
| 894 | out[6] = in[14]; |
| 895 | out[7] = in[3]; |
| 896 | out[8] = in[8]; |
| 897 | out[9] = in[13]; |
| 898 | out[10] = in[2]; |
| 899 | out[11] = in[7]; |
| 900 | out[12] = in[12]; |
| 901 | out[13] = in[1]; |
| 902 | out[14] = in[6]; |
| 903 | out[15] = in[11]; |
| 904 | |
| 905 | } |
| 906 | |
| 907 | static void mix_column(u8 *in, u8 *out) |
| 908 | { |
| 909 | int i; |
| 910 | u8 add1b[4]; |
| 911 | u8 add1bf7[4]; |
| 912 | u8 rotl[4]; |
| 913 | u8 swap_halfs[4]; |
| 914 | u8 andf7[4]; |
| 915 | u8 rotr[4]; |
| 916 | u8 temp[4]; |
| 917 | u8 tempb[4]; |
| 918 | |
Tina Ruchandani | 5db8bee | 2014-10-23 20:17:20 -0700 | [diff] [blame] | 919 | for (i = 0 ; i<4; i++) { |
Larry Finger | 5e93f35 | 2014-03-28 21:37:38 -0500 | [diff] [blame] | 920 | if ((in[i] & 0x80) == 0x80) |
| 921 | add1b[i] = 0x1b; |
| 922 | else |
| 923 | add1b[i] = 0x00; |
| 924 | } |
| 925 | |
| 926 | swap_halfs[0] = in[2]; /* Swap halfs */ |
| 927 | swap_halfs[1] = in[3]; |
| 928 | swap_halfs[2] = in[0]; |
| 929 | swap_halfs[3] = in[1]; |
| 930 | |
| 931 | rotl[0] = in[3]; /* Rotate left 8 bits */ |
| 932 | rotl[1] = in[0]; |
| 933 | rotl[2] = in[1]; |
| 934 | rotl[3] = in[2]; |
| 935 | |
| 936 | andf7[0] = in[0] & 0x7f; |
| 937 | andf7[1] = in[1] & 0x7f; |
| 938 | andf7[2] = in[2] & 0x7f; |
| 939 | andf7[3] = in[3] & 0x7f; |
| 940 | |
Tina Ruchandani | 5db8bee | 2014-10-23 20:17:20 -0700 | [diff] [blame] | 941 | for (i = 3; i>0; i--) { /* logical shift left 1 bit */ |
Larry Finger | 5e93f35 | 2014-03-28 21:37:38 -0500 | [diff] [blame] | 942 | andf7[i] = andf7[i] << 1; |
Tina Ruchandani | 5db8bee | 2014-10-23 20:17:20 -0700 | [diff] [blame] | 943 | if ((andf7[i-1] & 0x80) == 0x80) { |
Larry Finger | 5e93f35 | 2014-03-28 21:37:38 -0500 | [diff] [blame] | 944 | andf7[i] = (andf7[i] | 0x01); |
| 945 | } |
| 946 | } |
| 947 | andf7[0] = andf7[0] << 1; |
| 948 | andf7[0] = andf7[0] & 0xfe; |
| 949 | |
| 950 | xor_32(add1b, andf7, add1bf7); |
| 951 | |
| 952 | xor_32(in, add1bf7, rotr); |
| 953 | |
| 954 | temp[0] = rotr[0]; /* Rotate right 8 bits */ |
| 955 | rotr[0] = rotr[1]; |
| 956 | rotr[1] = rotr[2]; |
| 957 | rotr[2] = rotr[3]; |
| 958 | rotr[3] = temp[0]; |
| 959 | |
| 960 | xor_32(add1bf7, rotr, temp); |
| 961 | xor_32(swap_halfs, rotl, tempb); |
| 962 | xor_32(temp, tempb, out); |
| 963 | |
| 964 | } |
| 965 | |
| 966 | static void aes128k128d(u8 *key, u8 *data, u8 *ciphertext) |
| 967 | { |
| 968 | int round; |
| 969 | int i; |
| 970 | u8 intermediatea[16]; |
| 971 | u8 intermediateb[16]; |
| 972 | u8 round_key[16]; |
| 973 | |
| 974 | for (i = 0; i<16; i++) round_key[i] = key[i]; |
| 975 | |
Tina Ruchandani | 5db8bee | 2014-10-23 20:17:20 -0700 | [diff] [blame] | 976 | for (round = 0; round < 11; round++) { |
| 977 | if (round == 0) { |
Larry Finger | 5e93f35 | 2014-03-28 21:37:38 -0500 | [diff] [blame] | 978 | xor_128(round_key, data, ciphertext); |
| 979 | next_key(round_key, round); |
Tina Ruchandani | 5db8bee | 2014-10-23 20:17:20 -0700 | [diff] [blame] | 980 | } else if (round == 10) { |
Larry Finger | 5e93f35 | 2014-03-28 21:37:38 -0500 | [diff] [blame] | 981 | byte_sub(ciphertext, intermediatea); |
| 982 | shift_row(intermediatea, intermediateb); |
| 983 | xor_128(intermediateb, round_key, ciphertext); |
Tina Ruchandani | 5db8bee | 2014-10-23 20:17:20 -0700 | [diff] [blame] | 984 | } else { /* 1 - 9 */ |
Larry Finger | 5e93f35 | 2014-03-28 21:37:38 -0500 | [diff] [blame] | 985 | byte_sub(ciphertext, intermediatea); |
| 986 | shift_row(intermediatea, intermediateb); |
| 987 | mix_column(&intermediateb[0], &intermediatea[0]); |
| 988 | mix_column(&intermediateb[4], &intermediatea[4]); |
| 989 | mix_column(&intermediateb[8], &intermediatea[8]); |
| 990 | mix_column(&intermediateb[12], &intermediatea[12]); |
| 991 | xor_128(intermediatea, round_key, ciphertext); |
| 992 | next_key(round_key, round); |
| 993 | } |
| 994 | } |
| 995 | |
| 996 | } |
| 997 | |
| 998 | /************************************************/ |
| 999 | /* construct_mic_iv() */ |
| 1000 | /* Builds the MIC IV from header fields and PN */ |
| 1001 | /************************************************/ |
| 1002 | static void construct_mic_iv(u8 *mic_iv, int qc_exists, int a4_exists, u8 *mpdu, |
| 1003 | uint payload_length, u8 *pn_vector) |
| 1004 | { |
| 1005 | int i; |
| 1006 | |
| 1007 | mic_iv[0] = 0x59; |
| 1008 | if (qc_exists && a4_exists) |
| 1009 | mic_iv[1] = mpdu[30] & 0x0f; /* QoS_TC */ |
| 1010 | if (qc_exists && !a4_exists) |
| 1011 | mic_iv[1] = mpdu[24] & 0x0f; /* mute bits 7-4 */ |
| 1012 | if (!qc_exists) |
| 1013 | mic_iv[1] = 0x00; |
| 1014 | for (i = 2; i < 8; i++) |
| 1015 | mic_iv[i] = mpdu[i + 8]; /* mic_iv[2:7] = A2[0:5] = mpdu[10:15] */ |
| 1016 | for (i = 8; i < 14; i++) |
| 1017 | mic_iv[i] = pn_vector[13 - i]; /* mic_iv[8:13] = PN[5:0] */ |
| 1018 | mic_iv[14] = (unsigned char)(payload_length / 256); |
| 1019 | mic_iv[15] = (unsigned char)(payload_length % 256); |
| 1020 | } |
| 1021 | |
| 1022 | /************************************************/ |
| 1023 | /* construct_mic_header1() */ |
| 1024 | /* Builds the first MIC header block from */ |
| 1025 | /* header fields. */ |
| 1026 | /************************************************/ |
| 1027 | static void construct_mic_header1(u8 *mic_header1, int header_length, u8 *mpdu) |
| 1028 | { |
| 1029 | mic_header1[0] = (u8)((header_length - 2) / 256); |
| 1030 | mic_header1[1] = (u8)((header_length - 2) % 256); |
| 1031 | mic_header1[2] = mpdu[0] & 0xcf; /* Mute CF poll & CF ack bits */ |
| 1032 | mic_header1[3] = mpdu[1] & 0xc7; /* Mute retry, more data and pwr mgt bits */ |
| 1033 | mic_header1[4] = mpdu[4]; /* A1 */ |
| 1034 | mic_header1[5] = mpdu[5]; |
| 1035 | mic_header1[6] = mpdu[6]; |
| 1036 | mic_header1[7] = mpdu[7]; |
| 1037 | mic_header1[8] = mpdu[8]; |
| 1038 | mic_header1[9] = mpdu[9]; |
| 1039 | mic_header1[10] = mpdu[10]; /* A2 */ |
| 1040 | mic_header1[11] = mpdu[11]; |
| 1041 | mic_header1[12] = mpdu[12]; |
| 1042 | mic_header1[13] = mpdu[13]; |
| 1043 | mic_header1[14] = mpdu[14]; |
| 1044 | mic_header1[15] = mpdu[15]; |
| 1045 | |
| 1046 | } |
| 1047 | |
| 1048 | /************************************************/ |
| 1049 | /* construct_mic_header2() */ |
| 1050 | /* Builds the last MIC header block from */ |
| 1051 | /* header fields. */ |
| 1052 | /************************************************/ |
Greg Donald | a82b4b0 | 2014-09-08 20:50:23 -0500 | [diff] [blame] | 1053 | static void construct_mic_header2(u8 *mic_header2, u8 *mpdu, int a4_exists, |
| 1054 | int qc_exists) |
Larry Finger | 5e93f35 | 2014-03-28 21:37:38 -0500 | [diff] [blame] | 1055 | { |
| 1056 | int i; |
| 1057 | |
| 1058 | for (i = 0; i<16; i++) mic_header2[i]= 0x00; |
| 1059 | |
| 1060 | mic_header2[0] = mpdu[16]; /* A3 */ |
| 1061 | mic_header2[1] = mpdu[17]; |
| 1062 | mic_header2[2] = mpdu[18]; |
| 1063 | mic_header2[3] = mpdu[19]; |
| 1064 | mic_header2[4] = mpdu[20]; |
| 1065 | mic_header2[5] = mpdu[21]; |
| 1066 | |
| 1067 | mic_header2[6] = 0x00; |
| 1068 | mic_header2[7] = 0x00; /* mpdu[23]; */ |
| 1069 | |
Tina Ruchandani | 5db8bee | 2014-10-23 20:17:20 -0700 | [diff] [blame] | 1070 | if (!qc_exists && a4_exists) { |
Larry Finger | 5e93f35 | 2014-03-28 21:37:38 -0500 | [diff] [blame] | 1071 | for (i = 0;i<6;i++) mic_header2[8+i] = mpdu[24+i]; /* A4 */ |
| 1072 | |
| 1073 | } |
| 1074 | |
Tina Ruchandani | 5db8bee | 2014-10-23 20:17:20 -0700 | [diff] [blame] | 1075 | if (qc_exists && !a4_exists) { |
Larry Finger | 5e93f35 | 2014-03-28 21:37:38 -0500 | [diff] [blame] | 1076 | mic_header2[8] = mpdu[24] & 0x0f; /* mute bits 15 - 4 */ |
| 1077 | mic_header2[9] = mpdu[25] & 0x00; |
| 1078 | } |
| 1079 | |
Tina Ruchandani | 5db8bee | 2014-10-23 20:17:20 -0700 | [diff] [blame] | 1080 | if (qc_exists && a4_exists) { |
Larry Finger | 5e93f35 | 2014-03-28 21:37:38 -0500 | [diff] [blame] | 1081 | for (i = 0;i<6;i++) mic_header2[8+i] = mpdu[24+i]; /* A4 */ |
| 1082 | |
| 1083 | mic_header2[14] = mpdu[30] & 0x0f; |
| 1084 | mic_header2[15] = mpdu[31] & 0x00; |
| 1085 | } |
| 1086 | |
| 1087 | } |
| 1088 | |
| 1089 | /************************************************/ |
| 1090 | /* construct_mic_header2() */ |
| 1091 | /* Builds the last MIC header block from */ |
| 1092 | /* header fields. */ |
| 1093 | /************************************************/ |
| 1094 | static void construct_ctr_preload(u8 *ctr_preload, int a4_exists, int qc_exists, |
| 1095 | u8 *mpdu, u8 *pn_vector, int c) |
| 1096 | { |
| 1097 | int i = 0; |
| 1098 | |
| 1099 | for (i = 0; i<16; i++) ctr_preload[i] = 0x00; |
| 1100 | i = 0; |
| 1101 | |
| 1102 | ctr_preload[0] = 0x01; /* flag */ |
| 1103 | if (qc_exists && a4_exists) |
| 1104 | ctr_preload[1] = mpdu[30] & 0x0f; /* QoC_Control */ |
| 1105 | if (qc_exists && !a4_exists) |
| 1106 | ctr_preload[1] = mpdu[24] & 0x0f; |
| 1107 | |
| 1108 | for (i = 2; i < 8; i++) |
| 1109 | ctr_preload[i] = mpdu[i + 8]; /* ctr_preload[2:7] = A2[0:5] = mpdu[10:15] */ |
| 1110 | for (i = 8; i < 14; i++) |
| 1111 | ctr_preload[i] = pn_vector[13 - i]; /* ctr_preload[8:13] = PN[5:0] */ |
| 1112 | ctr_preload[14] = (unsigned char) (c / 256); /* Ctr */ |
| 1113 | ctr_preload[15] = (unsigned char) (c % 256); |
| 1114 | |
| 1115 | } |
| 1116 | |
| 1117 | /************************************/ |
| 1118 | /* bitwise_xor() */ |
| 1119 | /* A 128 bit, bitwise exclusive or */ |
| 1120 | /************************************/ |
| 1121 | static void bitwise_xor(u8 *ina, u8 *inb, u8 *out) |
| 1122 | { |
| 1123 | int i; |
| 1124 | |
| 1125 | for (i = 0; i < 16; i++) |
| 1126 | out[i] = ina[i] ^ inb[i]; |
| 1127 | } |
| 1128 | |
| 1129 | static int aes_cipher(u8 *key, uint hdrlen, u8 *pframe, uint plen) |
| 1130 | { |
| 1131 | uint qc_exists, a4_exists, i, j, payload_remainder, |
| 1132 | num_blocks, payload_index; |
| 1133 | u8 pn_vector[6]; |
| 1134 | u8 mic_iv[16]; |
| 1135 | u8 mic_header1[16]; |
| 1136 | u8 mic_header2[16]; |
| 1137 | u8 ctr_preload[16]; |
| 1138 | /* Intermediate Buffers */ |
| 1139 | u8 chain_buffer[16]; |
| 1140 | u8 aes_out[16]; |
| 1141 | u8 padded_buffer[16]; |
| 1142 | u8 mic[8]; |
| 1143 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)pframe; |
| 1144 | u16 frsubtype = le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_STYPE; |
| 1145 | |
| 1146 | memset((void *)mic_iv, 0, 16); |
| 1147 | memset((void *)mic_header1, 0, 16); |
| 1148 | memset((void *)mic_header2, 0, 16); |
| 1149 | memset((void *)ctr_preload, 0, 16); |
| 1150 | memset((void *)chain_buffer, 0, 16); |
| 1151 | memset((void *)aes_out, 0, 16); |
| 1152 | memset((void *)padded_buffer, 0, 16); |
| 1153 | |
| 1154 | if ((hdrlen == sizeof(struct ieee80211_hdr_3addr) || |
| 1155 | (hdrlen == sizeof(struct ieee80211_qos_hdr)))) |
| 1156 | a4_exists = 0; |
| 1157 | else |
| 1158 | a4_exists = 1; |
| 1159 | |
| 1160 | if (ieee80211_is_data(hdr->frame_control)) { |
| 1161 | if ((frsubtype == IEEE80211_STYPE_DATA_CFACK) || |
| 1162 | (frsubtype == IEEE80211_STYPE_DATA_CFPOLL) || |
| 1163 | (frsubtype == IEEE80211_STYPE_DATA_CFACKPOLL)) { |
| 1164 | qc_exists = 1; |
| 1165 | if (hdrlen != sizeof(struct ieee80211_qos_hdr)) |
| 1166 | hdrlen += 2; |
| 1167 | } else if ((frsubtype == IEEE80211_STYPE_QOS_DATA) || |
| 1168 | (frsubtype == IEEE80211_STYPE_QOS_DATA_CFACK) || |
| 1169 | (frsubtype == IEEE80211_STYPE_QOS_DATA_CFPOLL) || |
| 1170 | (frsubtype == IEEE80211_STYPE_QOS_DATA_CFACKPOLL)) { |
| 1171 | if (hdrlen != sizeof(struct ieee80211_qos_hdr)) |
| 1172 | hdrlen += 2; |
| 1173 | qc_exists = 1; |
| 1174 | } else { |
| 1175 | qc_exists = 0; |
| 1176 | } |
| 1177 | } else { |
| 1178 | qc_exists = 0; |
| 1179 | } |
| 1180 | pn_vector[0]= pframe[hdrlen]; |
| 1181 | pn_vector[1]= pframe[hdrlen+1]; |
| 1182 | pn_vector[2]= pframe[hdrlen+4]; |
| 1183 | pn_vector[3]= pframe[hdrlen+5]; |
| 1184 | pn_vector[4]= pframe[hdrlen+6]; |
| 1185 | pn_vector[5]= pframe[hdrlen+7]; |
| 1186 | |
| 1187 | construct_mic_iv(mic_iv, qc_exists, a4_exists, pframe, plen, pn_vector); |
| 1188 | |
| 1189 | construct_mic_header1(mic_header1, hdrlen, pframe); |
| 1190 | construct_mic_header2(mic_header2, pframe, a4_exists, qc_exists); |
| 1191 | |
| 1192 | payload_remainder = plen % 16; |
| 1193 | num_blocks = plen / 16; |
| 1194 | |
| 1195 | /* Find start of payload */ |
| 1196 | payload_index = (hdrlen + 8); |
| 1197 | |
| 1198 | /* Calculate MIC */ |
| 1199 | aes128k128d(key, mic_iv, aes_out); |
| 1200 | bitwise_xor(aes_out, mic_header1, chain_buffer); |
| 1201 | aes128k128d(key, chain_buffer, aes_out); |
| 1202 | bitwise_xor(aes_out, mic_header2, chain_buffer); |
| 1203 | aes128k128d(key, chain_buffer, aes_out); |
| 1204 | |
| 1205 | for (i = 0; i < num_blocks; i++) { |
| 1206 | bitwise_xor(aes_out, &pframe[payload_index], chain_buffer); |
| 1207 | |
| 1208 | payload_index += 16; |
| 1209 | aes128k128d(key, chain_buffer, aes_out); |
| 1210 | } |
| 1211 | |
| 1212 | /* Add on the final payload block if it needs padding */ |
| 1213 | if (payload_remainder > 0) { |
| 1214 | for (j = 0; j < 16; j++) |
| 1215 | padded_buffer[j] = 0x00; |
| 1216 | for (j = 0; j < payload_remainder; j++) |
| 1217 | padded_buffer[j] = pframe[payload_index++]; |
| 1218 | bitwise_xor(aes_out, padded_buffer, chain_buffer); |
| 1219 | aes128k128d(key, chain_buffer, aes_out); |
| 1220 | } |
| 1221 | |
| 1222 | for (j = 0; j < 8; j++) |
| 1223 | mic[j] = aes_out[j]; |
| 1224 | |
| 1225 | /* Insert MIC into payload */ |
| 1226 | for (j = 0; j < 8; j++) |
| 1227 | pframe[payload_index+j] = mic[j]; |
| 1228 | |
| 1229 | payload_index = hdrlen + 8; |
| 1230 | for (i = 0; i < num_blocks; i++) { |
| 1231 | construct_ctr_preload(ctr_preload, a4_exists, qc_exists, |
| 1232 | pframe, pn_vector, i+1); |
| 1233 | aes128k128d(key, ctr_preload, aes_out); |
| 1234 | bitwise_xor(aes_out, &pframe[payload_index], chain_buffer); |
| 1235 | for (j = 0; j < 16; j++) |
| 1236 | pframe[payload_index++] = chain_buffer[j]; |
| 1237 | } |
| 1238 | |
| 1239 | if (payload_remainder > 0) { |
| 1240 | /* If there is a short final block, then pad it, |
| 1241 | * encrypt it and copy the unpadded part back |
| 1242 | */ |
| 1243 | construct_ctr_preload(ctr_preload, a4_exists, qc_exists, pframe, |
| 1244 | pn_vector, num_blocks+1); |
| 1245 | |
| 1246 | for (j = 0; j < 16; j++) |
| 1247 | padded_buffer[j] = 0x00; |
| 1248 | for (j = 0; j < payload_remainder; j++) |
| 1249 | padded_buffer[j] = pframe[payload_index+j]; |
| 1250 | aes128k128d(key, ctr_preload, aes_out); |
| 1251 | bitwise_xor(aes_out, padded_buffer, chain_buffer); |
| 1252 | for (j = 0; j < payload_remainder;j++) |
| 1253 | pframe[payload_index++] = chain_buffer[j]; |
| 1254 | } |
| 1255 | |
| 1256 | /* Encrypt the MIC */ |
| 1257 | construct_ctr_preload(ctr_preload, a4_exists, qc_exists, pframe, |
| 1258 | pn_vector, 0); |
| 1259 | |
| 1260 | for (j = 0; j < 16; j++) |
| 1261 | padded_buffer[j] = 0x00; |
| 1262 | for (j = 0; j < 8; j++) |
| 1263 | padded_buffer[j] = pframe[j+hdrlen+8+plen]; |
| 1264 | |
| 1265 | aes128k128d(key, ctr_preload, aes_out); |
| 1266 | bitwise_xor(aes_out, padded_buffer, chain_buffer); |
| 1267 | for (j = 0; j < 8;j++) |
| 1268 | pframe[payload_index++] = chain_buffer[j]; |
| 1269 | |
| 1270 | return _SUCCESS; |
| 1271 | } |
| 1272 | |
Jes Sorensen | 75f3f03 | 2014-05-16 10:04:37 +0200 | [diff] [blame] | 1273 | int rtw_aes_encrypt23a(struct rtw_adapter *padapter, |
| 1274 | struct xmit_frame *pxmitframe) |
Larry Finger | 5e93f35 | 2014-03-28 21:37:38 -0500 | [diff] [blame] | 1275 | { /* exclude ICV */ |
| 1276 | /* Intermediate Buffers */ |
| 1277 | int curfragnum, length; |
| 1278 | u32 prwskeylen; |
| 1279 | u8 *pframe, *prwskey; /* *payload,*iv */ |
| 1280 | u8 hw_hdr_offset = 0; |
| 1281 | struct sta_info *stainfo; |
| 1282 | struct pkt_attrib *pattrib = &pxmitframe->attrib; |
| 1283 | struct security_priv *psecuritypriv = &padapter->securitypriv; |
| 1284 | struct xmit_priv *pxmitpriv = &padapter->xmitpriv; |
Jes Sorensen | 75f3f03 | 2014-05-16 10:04:37 +0200 | [diff] [blame] | 1285 | int res = _SUCCESS; |
Larry Finger | 5e93f35 | 2014-03-28 21:37:38 -0500 | [diff] [blame] | 1286 | |
| 1287 | if (!pxmitframe->buf_addr) |
| 1288 | return _FAIL; |
| 1289 | |
| 1290 | hw_hdr_offset = TXDESC_OFFSET; |
| 1291 | |
| 1292 | pframe = pxmitframe->buf_addr + hw_hdr_offset; |
| 1293 | |
| 1294 | /* 4 start to encrypt each fragment */ |
Jes Sorensen | 9e3d6df | 2014-05-21 09:37:34 +0200 | [diff] [blame] | 1295 | if (pattrib->encrypt != WLAN_CIPHER_SUITE_CCMP) |
Larry Finger | 5e93f35 | 2014-03-28 21:37:38 -0500 | [diff] [blame] | 1296 | return _FAIL; |
| 1297 | |
| 1298 | if (pattrib->psta) { |
| 1299 | stainfo = pattrib->psta; |
| 1300 | } else { |
| 1301 | DBG_8723A("%s, call rtw_get_stainfo23a()\n", __func__); |
| 1302 | stainfo = rtw_get_stainfo23a(&padapter->stapriv, &pattrib->ra[0]); |
| 1303 | } |
| 1304 | |
| 1305 | if (!stainfo) { |
| 1306 | RT_TRACE(_module_rtl871x_security_c_, _drv_err_, |
| 1307 | ("rtw_aes_encrypt23a: stainfo == NULL!!!\n")); |
| 1308 | DBG_8723A("%s, psta == NUL\n", __func__); |
| 1309 | res = _FAIL; |
| 1310 | goto out; |
| 1311 | } |
| 1312 | if (!(stainfo->state &_FW_LINKED)) { |
| 1313 | DBG_8723A("%s, psta->state(0x%x) != _FW_LINKED\n", |
| 1314 | __func__, stainfo->state); |
| 1315 | return _FAIL; |
| 1316 | } |
| 1317 | RT_TRACE(_module_rtl871x_security_c_, _drv_err_, |
| 1318 | ("rtw_aes_encrypt23a: stainfo!= NULL!!!\n")); |
| 1319 | |
| 1320 | if (is_multicast_ether_addr(pattrib->ra)) |
| 1321 | prwskey = psecuritypriv->dot118021XGrpKey[psecuritypriv->dot118021XGrpKeyid].skey; |
| 1322 | else |
| 1323 | prwskey = &stainfo->dot118021x_UncstKey.skey[0]; |
| 1324 | |
| 1325 | prwskeylen = 16; |
| 1326 | |
| 1327 | for (curfragnum = 0; curfragnum < pattrib->nr_frags; curfragnum++) { |
| 1328 | /* 4 the last fragment */ |
| 1329 | if ((curfragnum + 1) == pattrib->nr_frags) { |
| 1330 | length = pattrib->last_txcmdsz - |
| 1331 | pattrib->hdrlen-pattrib->iv_len - |
| 1332 | pattrib->icv_len; |
| 1333 | |
| 1334 | aes_cipher(prwskey, pattrib->hdrlen, pframe, length); |
| 1335 | } else { |
| 1336 | length = pxmitpriv->frag_len-pattrib->hdrlen - |
| 1337 | pattrib->iv_len - pattrib->icv_len; |
| 1338 | |
| 1339 | aes_cipher(prwskey, pattrib->hdrlen, pframe, length); |
| 1340 | pframe += pxmitpriv->frag_len; |
Larry Finger | c17416e | 2014-03-28 21:37:42 -0500 | [diff] [blame] | 1341 | pframe = PTR_ALIGN(pframe, 4); |
Larry Finger | 5e93f35 | 2014-03-28 21:37:38 -0500 | [diff] [blame] | 1342 | } |
| 1343 | } |
| 1344 | out: |
| 1345 | return res; |
| 1346 | } |
| 1347 | |
| 1348 | static int aes_decipher(u8 *key, uint hdrlen, |
| 1349 | u8 *pframe, uint plen) |
| 1350 | { |
| 1351 | static u8 message[MAX_MSG_SIZE]; |
| 1352 | uint qc_exists, a4_exists, i, j, payload_remainder, |
| 1353 | num_blocks, payload_index; |
| 1354 | int res = _SUCCESS; |
| 1355 | u8 pn_vector[6]; |
| 1356 | u8 mic_iv[16]; |
| 1357 | u8 mic_header1[16]; |
| 1358 | u8 mic_header2[16]; |
| 1359 | u8 ctr_preload[16]; |
| 1360 | /* Intermediate Buffers */ |
| 1361 | u8 chain_buffer[16]; |
| 1362 | u8 aes_out[16]; |
| 1363 | u8 padded_buffer[16]; |
| 1364 | u8 mic[8]; |
| 1365 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)pframe; |
| 1366 | u16 frsubtype = le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_STYPE; |
| 1367 | |
| 1368 | memset((void *)mic_iv, 0, 16); |
| 1369 | memset((void *)mic_header1, 0, 16); |
| 1370 | memset((void *)mic_header2, 0, 16); |
| 1371 | memset((void *)ctr_preload, 0, 16); |
| 1372 | memset((void *)chain_buffer, 0, 16); |
| 1373 | memset((void *)aes_out, 0, 16); |
| 1374 | memset((void *)padded_buffer, 0, 16); |
| 1375 | |
| 1376 | /* start to decrypt the payload */ |
| 1377 | |
| 1378 | num_blocks = (plen-8) / 16; /* plen including llc, payload_length and mic) */ |
| 1379 | |
| 1380 | payload_remainder = (plen-8) % 16; |
| 1381 | |
| 1382 | pn_vector[0] = pframe[hdrlen]; |
| 1383 | pn_vector[1] = pframe[hdrlen+1]; |
| 1384 | pn_vector[2] = pframe[hdrlen+4]; |
| 1385 | pn_vector[3] = pframe[hdrlen+5]; |
| 1386 | pn_vector[4] = pframe[hdrlen+6]; |
| 1387 | pn_vector[5] = pframe[hdrlen+7]; |
| 1388 | |
| 1389 | if ((hdrlen == sizeof(struct ieee80211_hdr_3addr) || |
| 1390 | (hdrlen == sizeof(struct ieee80211_qos_hdr)))) |
| 1391 | a4_exists = 0; |
| 1392 | else |
| 1393 | a4_exists = 1; |
| 1394 | |
| 1395 | if (ieee80211_is_data(hdr->frame_control)) { |
| 1396 | if ((frsubtype == IEEE80211_STYPE_DATA_CFACK) || |
| 1397 | (frsubtype == IEEE80211_STYPE_DATA_CFPOLL) || |
| 1398 | (frsubtype == IEEE80211_STYPE_DATA_CFACKPOLL)) { |
| 1399 | qc_exists = 1; |
| 1400 | if (hdrlen != sizeof(struct ieee80211_hdr_3addr)) |
| 1401 | hdrlen += 2; |
| 1402 | } else if ((frsubtype == IEEE80211_STYPE_QOS_DATA) || |
| 1403 | (frsubtype == IEEE80211_STYPE_QOS_DATA_CFACK) || |
| 1404 | (frsubtype == IEEE80211_STYPE_QOS_DATA_CFPOLL) || |
| 1405 | (frsubtype == IEEE80211_STYPE_QOS_DATA_CFACKPOLL)) { |
| 1406 | if (hdrlen != sizeof(struct ieee80211_hdr_3addr)) |
| 1407 | hdrlen += 2; |
| 1408 | qc_exists = 1; |
| 1409 | } else { |
| 1410 | qc_exists = 0; |
| 1411 | } |
| 1412 | } else { |
| 1413 | qc_exists = 0; |
| 1414 | } |
| 1415 | |
| 1416 | /* now, decrypt pframe with hdrlen offset and plen long */ |
| 1417 | |
| 1418 | payload_index = hdrlen + 8; /* 8 is for extiv */ |
| 1419 | |
| 1420 | for (i = 0; i < num_blocks; i++) { |
| 1421 | construct_ctr_preload(ctr_preload, a4_exists, qc_exists, |
| 1422 | pframe, pn_vector, i+1); |
| 1423 | |
| 1424 | aes128k128d(key, ctr_preload, aes_out); |
| 1425 | bitwise_xor(aes_out, &pframe[payload_index], chain_buffer); |
| 1426 | |
| 1427 | for (j = 0; j < 16; j++) |
| 1428 | pframe[payload_index++] = chain_buffer[j]; |
| 1429 | } |
| 1430 | |
| 1431 | if (payload_remainder > 0) { |
| 1432 | /* If there is a short final block, then pad it, |
| 1433 | * encrypt it and copy the unpadded part back |
| 1434 | */ |
| 1435 | construct_ctr_preload(ctr_preload, a4_exists, qc_exists, pframe, |
| 1436 | pn_vector, num_blocks+1); |
| 1437 | |
| 1438 | for (j = 0; j < 16; j++) |
| 1439 | padded_buffer[j] = 0x00; |
| 1440 | for (j = 0; j < payload_remainder; j++) |
| 1441 | padded_buffer[j] = pframe[payload_index+j]; |
| 1442 | aes128k128d(key, ctr_preload, aes_out); |
| 1443 | bitwise_xor(aes_out, padded_buffer, chain_buffer); |
| 1444 | for (j = 0; j < payload_remainder; j++) |
| 1445 | pframe[payload_index++] = chain_buffer[j]; |
| 1446 | } |
| 1447 | |
| 1448 | /* start to calculate the mic */ |
| 1449 | if ((hdrlen +plen+8) <= MAX_MSG_SIZE) |
| 1450 | memcpy(message, pframe, (hdrlen+plen+8)); /* 8 is for ext iv len */ |
| 1451 | |
| 1452 | pn_vector[0] = pframe[hdrlen]; |
| 1453 | pn_vector[1] = pframe[hdrlen+1]; |
| 1454 | pn_vector[2] = pframe[hdrlen+4]; |
| 1455 | pn_vector[3] = pframe[hdrlen+5]; |
| 1456 | pn_vector[4] = pframe[hdrlen+6]; |
| 1457 | pn_vector[5] = pframe[hdrlen+7]; |
| 1458 | |
| 1459 | construct_mic_iv(mic_iv, qc_exists, a4_exists, message, |
| 1460 | plen-8, pn_vector); |
| 1461 | |
| 1462 | construct_mic_header1(mic_header1, hdrlen, message); |
| 1463 | construct_mic_header2(mic_header2, message, a4_exists, qc_exists); |
| 1464 | |
| 1465 | payload_remainder = (plen-8) % 16; |
| 1466 | num_blocks = (plen-8) / 16; |
| 1467 | |
| 1468 | /* Find start of payload */ |
| 1469 | payload_index = (hdrlen + 8); |
| 1470 | |
| 1471 | /* Calculate MIC */ |
| 1472 | aes128k128d(key, mic_iv, aes_out); |
| 1473 | bitwise_xor(aes_out, mic_header1, chain_buffer); |
| 1474 | aes128k128d(key, chain_buffer, aes_out); |
| 1475 | bitwise_xor(aes_out, mic_header2, chain_buffer); |
| 1476 | aes128k128d(key, chain_buffer, aes_out); |
| 1477 | |
| 1478 | for (i = 0; i < num_blocks; i++) { |
| 1479 | bitwise_xor(aes_out, &message[payload_index], chain_buffer); |
| 1480 | |
| 1481 | payload_index += 16; |
| 1482 | aes128k128d(key, chain_buffer, aes_out); |
| 1483 | } |
| 1484 | |
| 1485 | /* Add on the final payload block if it needs padding */ |
| 1486 | if (payload_remainder > 0) { |
| 1487 | for (j = 0; j < 16; j++) |
| 1488 | padded_buffer[j] = 0x00; |
| 1489 | for (j = 0; j < payload_remainder; j++) |
| 1490 | padded_buffer[j] = message[payload_index++]; |
| 1491 | bitwise_xor(aes_out, padded_buffer, chain_buffer); |
| 1492 | aes128k128d(key, chain_buffer, aes_out); |
| 1493 | } |
| 1494 | |
| 1495 | for (j = 0 ; j < 8; j++) |
| 1496 | mic[j] = aes_out[j]; |
| 1497 | |
| 1498 | /* Insert MIC into payload */ |
| 1499 | for (j = 0; j < 8; j++) |
| 1500 | message[payload_index+j] = mic[j]; |
| 1501 | |
| 1502 | payload_index = hdrlen + 8; |
| 1503 | for (i = 0; i< num_blocks; i++) { |
| 1504 | construct_ctr_preload(ctr_preload, a4_exists, qc_exists, |
| 1505 | message, pn_vector, i+1); |
| 1506 | aes128k128d(key, ctr_preload, aes_out); |
| 1507 | bitwise_xor(aes_out, &message[payload_index], chain_buffer); |
| 1508 | for (j = 0; j < 16; j++) |
| 1509 | message[payload_index++] = chain_buffer[j]; |
| 1510 | } |
| 1511 | |
| 1512 | if (payload_remainder > 0) { |
| 1513 | /* If there is a short final block, then pad it, |
| 1514 | * encrypt it and copy the unpadded part back |
| 1515 | */ |
| 1516 | construct_ctr_preload(ctr_preload, a4_exists, qc_exists, |
| 1517 | message, pn_vector, num_blocks+1); |
| 1518 | |
| 1519 | for (j = 0; j < 16; j++) |
| 1520 | padded_buffer[j] = 0x00; |
| 1521 | for (j = 0; j < payload_remainder; j++) |
| 1522 | padded_buffer[j] = message[payload_index+j]; |
| 1523 | aes128k128d(key, ctr_preload, aes_out); |
| 1524 | bitwise_xor(aes_out, padded_buffer, chain_buffer); |
| 1525 | for (j = 0; j < payload_remainder; j++) |
| 1526 | message[payload_index++] = chain_buffer[j]; |
| 1527 | } |
| 1528 | |
| 1529 | /* Encrypt the MIC */ |
| 1530 | construct_ctr_preload(ctr_preload, a4_exists, qc_exists, message, |
| 1531 | pn_vector, 0); |
| 1532 | |
| 1533 | for (j = 0; j < 16; j++) |
| 1534 | padded_buffer[j] = 0x00; |
| 1535 | for (j = 0; j < 8; j++) |
| 1536 | padded_buffer[j] = message[j+hdrlen+8+plen-8]; |
| 1537 | |
| 1538 | aes128k128d(key, ctr_preload, aes_out); |
| 1539 | bitwise_xor(aes_out, padded_buffer, chain_buffer); |
| 1540 | for (j = 0; j < 8; j++) |
| 1541 | message[payload_index++] = chain_buffer[j]; |
| 1542 | |
| 1543 | /* compare the mic */ |
| 1544 | for (i = 0; i < 8; i++) { |
| 1545 | if (pframe[hdrlen+8+plen-8+i] != message[hdrlen+8+plen-8+i]) { |
| 1546 | RT_TRACE(_module_rtl871x_security_c_, _drv_err_, |
| 1547 | ("aes_decipher:mic check error mic[%d]: pframe(%x) != message(%x)\n", |
| 1548 | i, pframe[hdrlen+8+plen-8+i], message[hdrlen+8+plen-8+i])); |
| 1549 | DBG_8723A("aes_decipher:mic check error mic[%d]: pframe(%x) != message(%x)\n", |
| 1550 | i, pframe[hdrlen+8+plen-8+i], message[hdrlen+8+plen-8+i]); |
| 1551 | res = _FAIL; |
| 1552 | } |
| 1553 | } |
| 1554 | return res; |
| 1555 | } |
| 1556 | |
Jes Sorensen | 75f3f03 | 2014-05-16 10:04:37 +0200 | [diff] [blame] | 1557 | int rtw_aes_decrypt23a(struct rtw_adapter *padapter, |
| 1558 | struct recv_frame *precvframe) |
Larry Finger | 5e93f35 | 2014-03-28 21:37:38 -0500 | [diff] [blame] | 1559 | { /* exclude ICV */ |
| 1560 | struct sta_info *stainfo; |
| 1561 | struct rx_pkt_attrib *prxattrib = &precvframe->attrib; |
| 1562 | struct security_priv *psecuritypriv = &padapter->securitypriv; |
| 1563 | struct sk_buff *skb = precvframe->pkt; |
| 1564 | int length; |
| 1565 | u8 *pframe, *prwskey; /* *payload,*iv */ |
Jes Sorensen | 75f3f03 | 2014-05-16 10:04:37 +0200 | [diff] [blame] | 1566 | int res = _SUCCESS; |
Larry Finger | 5e93f35 | 2014-03-28 21:37:38 -0500 | [diff] [blame] | 1567 | |
| 1568 | pframe = skb->data; |
| 1569 | /* 4 start to encrypt each fragment */ |
Jes Sorensen | 9e3d6df | 2014-05-21 09:37:34 +0200 | [diff] [blame] | 1570 | if (prxattrib->encrypt != WLAN_CIPHER_SUITE_CCMP) |
Larry Finger | 5e93f35 | 2014-03-28 21:37:38 -0500 | [diff] [blame] | 1571 | return _FAIL; |
| 1572 | |
| 1573 | stainfo = rtw_get_stainfo23a(&padapter->stapriv, &prxattrib->ta[0]); |
| 1574 | if (!stainfo) { |
| 1575 | RT_TRACE(_module_rtl871x_security_c_, _drv_err_, |
| 1576 | ("rtw_aes_encrypt23a: stainfo == NULL!!!\n")); |
| 1577 | res = _FAIL; |
| 1578 | goto exit; |
| 1579 | } |
| 1580 | |
| 1581 | RT_TRACE(_module_rtl871x_security_c_, _drv_err_, |
| 1582 | ("rtw_aes_decrypt23a: stainfo!= NULL!!!\n")); |
| 1583 | |
| 1584 | if (is_multicast_ether_addr(prxattrib->ra)) { |
| 1585 | /* in concurrent we should use sw decrypt in group key, |
| 1586 | so we remove this message */ |
| 1587 | if (!psecuritypriv->binstallGrpkey) { |
| 1588 | res = _FAIL; |
| 1589 | DBG_8723A("%s:rx bc/mc packets, but didn't install " |
| 1590 | "group key!!!!!!!!!!\n", __func__); |
| 1591 | goto exit; |
| 1592 | } |
| 1593 | prwskey = psecuritypriv->dot118021XGrpKey[prxattrib->key_index].skey; |
| 1594 | if (psecuritypriv->dot118021XGrpKeyid != prxattrib->key_index) { |
| 1595 | DBG_8723A("not match packet_index =%d, install_index =" |
| 1596 | "%d\n", prxattrib->key_index, |
| 1597 | psecuritypriv->dot118021XGrpKeyid); |
| 1598 | res = _FAIL; |
| 1599 | goto exit; |
| 1600 | } |
| 1601 | } else { |
| 1602 | prwskey = &stainfo->dot118021x_UncstKey.skey[0]; |
| 1603 | } |
| 1604 | |
| 1605 | length = skb->len - prxattrib->hdrlen - prxattrib->iv_len; |
| 1606 | |
| 1607 | res = aes_decipher(prwskey, prxattrib->hdrlen, pframe, length); |
| 1608 | exit: |
| 1609 | return res; |
| 1610 | } |
| 1611 | |
| 1612 | void rtw_use_tkipkey_handler23a(void *FunctionContext) |
| 1613 | { |
| 1614 | struct rtw_adapter *padapter = (struct rtw_adapter *)FunctionContext; |
| 1615 | |
| 1616 | RT_TRACE(_module_rtl871x_security_c_, _drv_err_, ("^^^rtw_use_tkipkey_handler23a ^^^\n")); |
Jes Sorensen | 9216c51 | 2014-05-21 09:37:29 +0200 | [diff] [blame] | 1617 | padapter->securitypriv.busetkipkey = 1; |
Larry Finger | 5e93f35 | 2014-03-28 21:37:38 -0500 | [diff] [blame] | 1618 | RT_TRACE(_module_rtl871x_security_c_, _drv_err_, |
| 1619 | ("^^^rtw_use_tkipkey_handler23a padapter->securitypriv.busetkipkey =%d^^^\n", |
| 1620 | padapter->securitypriv.busetkipkey)); |
| 1621 | } |