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8fc8598e JC |
1 | /* |
2 | * Host AP crypt: host-based TKIP encryption implementation for Host AP driver | |
3 | * | |
4 | * Copyright (c) 2003-2004, Jouni Malinen <jkmaline@cc.hut.fi> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2 as | |
8 | * published by the Free Software Foundation. See README and COPYING for | |
9 | * more details. | |
10 | */ | |
11 | ||
12 | //#include <linux/config.h> | |
13 | #include <linux/version.h> | |
14 | #include <linux/module.h> | |
15 | #include <linux/init.h> | |
16 | #include <linux/slab.h> | |
17 | #include <linux/random.h> | |
18 | #include <linux/skbuff.h> | |
19 | #include <linux/netdevice.h> | |
20 | #include <linux/if_ether.h> | |
21 | #include <linux/if_arp.h> | |
22 | #include <asm/string.h> | |
23 | ||
24 | #include "ieee80211.h" | |
25 | #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,20)) | |
26 | //#include "crypto_compat.h" | |
27 | #endif | |
28 | ||
29 | ||
30 | #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)) | |
31 | #include "rtl_crypto.h" | |
32 | #else | |
33 | #include <linux/crypto.h> | |
34 | #endif | |
35 | //#include <asm/scatterlist.h> | |
36 | #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,20) | |
37 | #include <asm/scatterlist.h> | |
38 | #else | |
39 | #include <linux/scatterlist.h> | |
40 | #endif | |
41 | ||
42 | #include <linux/crc32.h> | |
43 | ||
44 | MODULE_AUTHOR("Jouni Malinen"); | |
45 | MODULE_DESCRIPTION("Host AP crypt: TKIP"); | |
46 | MODULE_LICENSE("GPL"); | |
47 | ||
48 | #ifndef OPENSUSE_SLED | |
49 | #define OPENSUSE_SLED 0 | |
50 | #endif | |
51 | ||
52 | struct ieee80211_tkip_data { | |
53 | #define TKIP_KEY_LEN 32 | |
54 | u8 key[TKIP_KEY_LEN]; | |
55 | int key_set; | |
56 | ||
57 | u32 tx_iv32; | |
58 | u16 tx_iv16; | |
59 | u16 tx_ttak[5]; | |
60 | int tx_phase1_done; | |
61 | ||
62 | u32 rx_iv32; | |
63 | u16 rx_iv16; | |
64 | u16 rx_ttak[5]; | |
65 | int rx_phase1_done; | |
66 | u32 rx_iv32_new; | |
67 | u16 rx_iv16_new; | |
68 | ||
69 | u32 dot11RSNAStatsTKIPReplays; | |
70 | u32 dot11RSNAStatsTKIPICVErrors; | |
71 | u32 dot11RSNAStatsTKIPLocalMICFailures; | |
72 | ||
73 | int key_idx; | |
74 | #if((LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,21)) || (OPENSUSE_SLED)) | |
75 | struct crypto_blkcipher *rx_tfm_arc4; | |
76 | struct crypto_hash *rx_tfm_michael; | |
77 | struct crypto_blkcipher *tx_tfm_arc4; | |
78 | struct crypto_hash *tx_tfm_michael; | |
79 | #else | |
80 | struct crypto_tfm *tx_tfm_arc4; | |
81 | struct crypto_tfm *tx_tfm_michael; | |
82 | struct crypto_tfm *rx_tfm_arc4; | |
83 | struct crypto_tfm *rx_tfm_michael; | |
84 | #endif | |
85 | /* scratch buffers for virt_to_page() (crypto API) */ | |
86 | u8 rx_hdr[16], tx_hdr[16]; | |
87 | }; | |
88 | ||
89 | static void * ieee80211_tkip_init(int key_idx) | |
90 | { | |
91 | struct ieee80211_tkip_data *priv; | |
92 | ||
93 | priv = kmalloc(sizeof(*priv), GFP_ATOMIC); | |
94 | if (priv == NULL) | |
95 | goto fail; | |
96 | memset(priv, 0, sizeof(*priv)); | |
97 | priv->key_idx = key_idx; | |
98 | #if((LINUX_VERSION_CODE < KERNEL_VERSION(2,6,21)) && (!OPENSUSE_SLED)) | |
99 | priv->tx_tfm_arc4 = crypto_alloc_tfm("arc4", 0); | |
100 | if (priv->tx_tfm_arc4 == NULL) { | |
101 | printk(KERN_DEBUG "ieee80211_crypt_tkip: could not allocate " | |
102 | "crypto API arc4\n"); | |
103 | goto fail; | |
104 | } | |
105 | ||
106 | priv->tx_tfm_michael = crypto_alloc_tfm("michael_mic", 0); | |
107 | if (priv->tx_tfm_michael == NULL) { | |
108 | printk(KERN_DEBUG "ieee80211_crypt_tkip: could not allocate " | |
109 | "crypto API michael_mic\n"); | |
110 | goto fail; | |
111 | } | |
112 | ||
113 | priv->rx_tfm_arc4 = crypto_alloc_tfm("arc4", 0); | |
114 | if (priv->rx_tfm_arc4 == NULL) { | |
115 | printk(KERN_DEBUG "ieee80211_crypt_tkip: could not allocate " | |
116 | "crypto API arc4\n"); | |
117 | goto fail; | |
118 | } | |
119 | ||
120 | priv->rx_tfm_michael = crypto_alloc_tfm("michael_mic", 0); | |
121 | if (priv->rx_tfm_michael == NULL) { | |
122 | printk(KERN_DEBUG "ieee80211_crypt_tkip: could not allocate " | |
123 | "crypto API michael_mic\n"); | |
124 | goto fail; | |
125 | } | |
126 | #else | |
127 | priv->tx_tfm_arc4 = crypto_alloc_blkcipher("ecb(arc4)", 0, | |
128 | CRYPTO_ALG_ASYNC); | |
129 | if (IS_ERR(priv->tx_tfm_arc4)) { | |
130 | printk(KERN_DEBUG "ieee80211_crypt_tkip: could not allocate " | |
131 | "crypto API arc4\n"); | |
132 | priv->tx_tfm_arc4 = NULL; | |
133 | goto fail; | |
134 | } | |
135 | ||
136 | priv->tx_tfm_michael = crypto_alloc_hash("michael_mic", 0, | |
137 | CRYPTO_ALG_ASYNC); | |
138 | if (IS_ERR(priv->tx_tfm_michael)) { | |
139 | printk(KERN_DEBUG "ieee80211_crypt_tkip: could not allocate " | |
140 | "crypto API michael_mic\n"); | |
141 | priv->tx_tfm_michael = NULL; | |
142 | goto fail; | |
143 | } | |
144 | ||
145 | priv->rx_tfm_arc4 = crypto_alloc_blkcipher("ecb(arc4)", 0, | |
146 | CRYPTO_ALG_ASYNC); | |
147 | if (IS_ERR(priv->rx_tfm_arc4)) { | |
148 | printk(KERN_DEBUG "ieee80211_crypt_tkip: could not allocate " | |
149 | "crypto API arc4\n"); | |
150 | priv->rx_tfm_arc4 = NULL; | |
151 | goto fail; | |
152 | } | |
153 | ||
154 | priv->rx_tfm_michael = crypto_alloc_hash("michael_mic", 0, | |
155 | CRYPTO_ALG_ASYNC); | |
156 | if (IS_ERR(priv->rx_tfm_michael)) { | |
157 | printk(KERN_DEBUG "ieee80211_crypt_tkip: could not allocate " | |
158 | "crypto API michael_mic\n"); | |
159 | priv->rx_tfm_michael = NULL; | |
160 | goto fail; | |
161 | } | |
162 | #endif | |
163 | return priv; | |
164 | ||
165 | fail: | |
166 | if (priv) { | |
167 | #if((LINUX_VERSION_CODE < KERNEL_VERSION(2,6,21)) && (!OPENSUSE_SLED)) | |
168 | if (priv->tx_tfm_michael) | |
169 | crypto_free_tfm(priv->tx_tfm_michael); | |
170 | if (priv->tx_tfm_arc4) | |
171 | crypto_free_tfm(priv->tx_tfm_arc4); | |
172 | if (priv->rx_tfm_michael) | |
173 | crypto_free_tfm(priv->rx_tfm_michael); | |
174 | if (priv->rx_tfm_arc4) | |
175 | crypto_free_tfm(priv->rx_tfm_arc4); | |
176 | ||
177 | #else | |
178 | if (priv->tx_tfm_michael) | |
179 | crypto_free_hash(priv->tx_tfm_michael); | |
180 | if (priv->tx_tfm_arc4) | |
181 | crypto_free_blkcipher(priv->tx_tfm_arc4); | |
182 | if (priv->rx_tfm_michael) | |
183 | crypto_free_hash(priv->rx_tfm_michael); | |
184 | if (priv->rx_tfm_arc4) | |
185 | crypto_free_blkcipher(priv->rx_tfm_arc4); | |
186 | #endif | |
187 | kfree(priv); | |
188 | } | |
189 | ||
190 | return NULL; | |
191 | } | |
192 | ||
193 | ||
194 | static void ieee80211_tkip_deinit(void *priv) | |
195 | { | |
196 | struct ieee80211_tkip_data *_priv = priv; | |
197 | #if((LINUX_VERSION_CODE < KERNEL_VERSION(2,6,21)) && (!OPENSUSE_SLED)) | |
198 | if (_priv->tx_tfm_michael) | |
199 | crypto_free_tfm(_priv->tx_tfm_michael); | |
200 | if (_priv->tx_tfm_arc4) | |
201 | crypto_free_tfm(_priv->tx_tfm_arc4); | |
202 | if (_priv->rx_tfm_michael) | |
203 | crypto_free_tfm(_priv->rx_tfm_michael); | |
204 | if (_priv->rx_tfm_arc4) | |
205 | crypto_free_tfm(_priv->rx_tfm_arc4); | |
206 | #else | |
207 | if (_priv) { | |
208 | if (_priv->tx_tfm_michael) | |
209 | crypto_free_hash(_priv->tx_tfm_michael); | |
210 | if (_priv->tx_tfm_arc4) | |
211 | crypto_free_blkcipher(_priv->tx_tfm_arc4); | |
212 | if (_priv->rx_tfm_michael) | |
213 | crypto_free_hash(_priv->rx_tfm_michael); | |
214 | if (_priv->rx_tfm_arc4) | |
215 | crypto_free_blkcipher(_priv->rx_tfm_arc4); | |
216 | } | |
217 | #endif | |
218 | kfree(priv); | |
219 | } | |
220 | ||
221 | ||
222 | static inline u16 RotR1(u16 val) | |
223 | { | |
224 | return (val >> 1) | (val << 15); | |
225 | } | |
226 | ||
227 | ||
228 | static inline u8 Lo8(u16 val) | |
229 | { | |
230 | return val & 0xff; | |
231 | } | |
232 | ||
233 | ||
234 | static inline u8 Hi8(u16 val) | |
235 | { | |
236 | return val >> 8; | |
237 | } | |
238 | ||
239 | ||
240 | static inline u16 Lo16(u32 val) | |
241 | { | |
242 | return val & 0xffff; | |
243 | } | |
244 | ||
245 | ||
246 | static inline u16 Hi16(u32 val) | |
247 | { | |
248 | return val >> 16; | |
249 | } | |
250 | ||
251 | ||
252 | static inline u16 Mk16(u8 hi, u8 lo) | |
253 | { | |
254 | return lo | (((u16) hi) << 8); | |
255 | } | |
256 | ||
257 | ||
258 | static inline u16 Mk16_le(u16 *v) | |
259 | { | |
260 | return le16_to_cpu(*v); | |
261 | } | |
262 | ||
263 | ||
264 | static const u16 Sbox[256] = | |
265 | { | |
266 | 0xC6A5, 0xF884, 0xEE99, 0xF68D, 0xFF0D, 0xD6BD, 0xDEB1, 0x9154, | |
267 | 0x6050, 0x0203, 0xCEA9, 0x567D, 0xE719, 0xB562, 0x4DE6, 0xEC9A, | |
268 | 0x8F45, 0x1F9D, 0x8940, 0xFA87, 0xEF15, 0xB2EB, 0x8EC9, 0xFB0B, | |
269 | 0x41EC, 0xB367, 0x5FFD, 0x45EA, 0x23BF, 0x53F7, 0xE496, 0x9B5B, | |
270 | 0x75C2, 0xE11C, 0x3DAE, 0x4C6A, 0x6C5A, 0x7E41, 0xF502, 0x834F, | |
271 | 0x685C, 0x51F4, 0xD134, 0xF908, 0xE293, 0xAB73, 0x6253, 0x2A3F, | |
272 | 0x080C, 0x9552, 0x4665, 0x9D5E, 0x3028, 0x37A1, 0x0A0F, 0x2FB5, | |
273 | 0x0E09, 0x2436, 0x1B9B, 0xDF3D, 0xCD26, 0x4E69, 0x7FCD, 0xEA9F, | |
274 | 0x121B, 0x1D9E, 0x5874, 0x342E, 0x362D, 0xDCB2, 0xB4EE, 0x5BFB, | |
275 | 0xA4F6, 0x764D, 0xB761, 0x7DCE, 0x527B, 0xDD3E, 0x5E71, 0x1397, | |
276 | 0xA6F5, 0xB968, 0x0000, 0xC12C, 0x4060, 0xE31F, 0x79C8, 0xB6ED, | |
277 | 0xD4BE, 0x8D46, 0x67D9, 0x724B, 0x94DE, 0x98D4, 0xB0E8, 0x854A, | |
278 | 0xBB6B, 0xC52A, 0x4FE5, 0xED16, 0x86C5, 0x9AD7, 0x6655, 0x1194, | |
279 | 0x8ACF, 0xE910, 0x0406, 0xFE81, 0xA0F0, 0x7844, 0x25BA, 0x4BE3, | |
280 | 0xA2F3, 0x5DFE, 0x80C0, 0x058A, 0x3FAD, 0x21BC, 0x7048, 0xF104, | |
281 | 0x63DF, 0x77C1, 0xAF75, 0x4263, 0x2030, 0xE51A, 0xFD0E, 0xBF6D, | |
282 | 0x814C, 0x1814, 0x2635, 0xC32F, 0xBEE1, 0x35A2, 0x88CC, 0x2E39, | |
283 | 0x9357, 0x55F2, 0xFC82, 0x7A47, 0xC8AC, 0xBAE7, 0x322B, 0xE695, | |
284 | 0xC0A0, 0x1998, 0x9ED1, 0xA37F, 0x4466, 0x547E, 0x3BAB, 0x0B83, | |
285 | 0x8CCA, 0xC729, 0x6BD3, 0x283C, 0xA779, 0xBCE2, 0x161D, 0xAD76, | |
286 | 0xDB3B, 0x6456, 0x744E, 0x141E, 0x92DB, 0x0C0A, 0x486C, 0xB8E4, | |
287 | 0x9F5D, 0xBD6E, 0x43EF, 0xC4A6, 0x39A8, 0x31A4, 0xD337, 0xF28B, | |
288 | 0xD532, 0x8B43, 0x6E59, 0xDAB7, 0x018C, 0xB164, 0x9CD2, 0x49E0, | |
289 | 0xD8B4, 0xACFA, 0xF307, 0xCF25, 0xCAAF, 0xF48E, 0x47E9, 0x1018, | |
290 | 0x6FD5, 0xF088, 0x4A6F, 0x5C72, 0x3824, 0x57F1, 0x73C7, 0x9751, | |
291 | 0xCB23, 0xA17C, 0xE89C, 0x3E21, 0x96DD, 0x61DC, 0x0D86, 0x0F85, | |
292 | 0xE090, 0x7C42, 0x71C4, 0xCCAA, 0x90D8, 0x0605, 0xF701, 0x1C12, | |
293 | 0xC2A3, 0x6A5F, 0xAEF9, 0x69D0, 0x1791, 0x9958, 0x3A27, 0x27B9, | |
294 | 0xD938, 0xEB13, 0x2BB3, 0x2233, 0xD2BB, 0xA970, 0x0789, 0x33A7, | |
295 | 0x2DB6, 0x3C22, 0x1592, 0xC920, 0x8749, 0xAAFF, 0x5078, 0xA57A, | |
296 | 0x038F, 0x59F8, 0x0980, 0x1A17, 0x65DA, 0xD731, 0x84C6, 0xD0B8, | |
297 | 0x82C3, 0x29B0, 0x5A77, 0x1E11, 0x7BCB, 0xA8FC, 0x6DD6, 0x2C3A, | |
298 | }; | |
299 | ||
300 | ||
301 | static inline u16 _S_(u16 v) | |
302 | { | |
303 | u16 t = Sbox[Hi8(v)]; | |
304 | return Sbox[Lo8(v)] ^ ((t << 8) | (t >> 8)); | |
305 | } | |
306 | ||
307 | ||
308 | #define PHASE1_LOOP_COUNT 8 | |
309 | ||
310 | ||
311 | static void tkip_mixing_phase1(u16 *TTAK, const u8 *TK, const u8 *TA, u32 IV32) | |
312 | { | |
313 | int i, j; | |
314 | ||
315 | /* Initialize the 80-bit TTAK from TSC (IV32) and TA[0..5] */ | |
316 | TTAK[0] = Lo16(IV32); | |
317 | TTAK[1] = Hi16(IV32); | |
318 | TTAK[2] = Mk16(TA[1], TA[0]); | |
319 | TTAK[3] = Mk16(TA[3], TA[2]); | |
320 | TTAK[4] = Mk16(TA[5], TA[4]); | |
321 | ||
322 | for (i = 0; i < PHASE1_LOOP_COUNT; i++) { | |
323 | j = 2 * (i & 1); | |
324 | TTAK[0] += _S_(TTAK[4] ^ Mk16(TK[1 + j], TK[0 + j])); | |
325 | TTAK[1] += _S_(TTAK[0] ^ Mk16(TK[5 + j], TK[4 + j])); | |
326 | TTAK[2] += _S_(TTAK[1] ^ Mk16(TK[9 + j], TK[8 + j])); | |
327 | TTAK[3] += _S_(TTAK[2] ^ Mk16(TK[13 + j], TK[12 + j])); | |
328 | TTAK[4] += _S_(TTAK[3] ^ Mk16(TK[1 + j], TK[0 + j])) + i; | |
329 | } | |
330 | } | |
331 | ||
332 | ||
333 | static void tkip_mixing_phase2(u8 *WEPSeed, const u8 *TK, const u16 *TTAK, | |
334 | u16 IV16) | |
335 | { | |
336 | /* Make temporary area overlap WEP seed so that the final copy can be | |
337 | * avoided on little endian hosts. */ | |
338 | u16 *PPK = (u16 *) &WEPSeed[4]; | |
339 | ||
340 | /* Step 1 - make copy of TTAK and bring in TSC */ | |
341 | PPK[0] = TTAK[0]; | |
342 | PPK[1] = TTAK[1]; | |
343 | PPK[2] = TTAK[2]; | |
344 | PPK[3] = TTAK[3]; | |
345 | PPK[4] = TTAK[4]; | |
346 | PPK[5] = TTAK[4] + IV16; | |
347 | ||
348 | /* Step 2 - 96-bit bijective mixing using S-box */ | |
349 | PPK[0] += _S_(PPK[5] ^ Mk16_le((u16 *) &TK[0])); | |
350 | PPK[1] += _S_(PPK[0] ^ Mk16_le((u16 *) &TK[2])); | |
351 | PPK[2] += _S_(PPK[1] ^ Mk16_le((u16 *) &TK[4])); | |
352 | PPK[3] += _S_(PPK[2] ^ Mk16_le((u16 *) &TK[6])); | |
353 | PPK[4] += _S_(PPK[3] ^ Mk16_le((u16 *) &TK[8])); | |
354 | PPK[5] += _S_(PPK[4] ^ Mk16_le((u16 *) &TK[10])); | |
355 | ||
356 | PPK[0] += RotR1(PPK[5] ^ Mk16_le((u16 *) &TK[12])); | |
357 | PPK[1] += RotR1(PPK[0] ^ Mk16_le((u16 *) &TK[14])); | |
358 | PPK[2] += RotR1(PPK[1]); | |
359 | PPK[3] += RotR1(PPK[2]); | |
360 | PPK[4] += RotR1(PPK[3]); | |
361 | PPK[5] += RotR1(PPK[4]); | |
362 | ||
363 | /* Step 3 - bring in last of TK bits, assign 24-bit WEP IV value | |
364 | * WEPSeed[0..2] is transmitted as WEP IV */ | |
365 | WEPSeed[0] = Hi8(IV16); | |
366 | WEPSeed[1] = (Hi8(IV16) | 0x20) & 0x7F; | |
367 | WEPSeed[2] = Lo8(IV16); | |
368 | WEPSeed[3] = Lo8((PPK[5] ^ Mk16_le((u16 *) &TK[0])) >> 1); | |
369 | ||
370 | #ifdef __BIG_ENDIAN | |
371 | { | |
372 | int i; | |
373 | for (i = 0; i < 6; i++) | |
374 | PPK[i] = (PPK[i] << 8) | (PPK[i] >> 8); | |
375 | } | |
376 | #endif | |
377 | } | |
378 | ||
379 | ||
380 | static int ieee80211_tkip_encrypt(struct sk_buff *skb, int hdr_len, void *priv) | |
381 | { | |
382 | struct ieee80211_tkip_data *tkey = priv; | |
383 | int len; | |
384 | u8 *pos; | |
385 | struct ieee80211_hdr_4addr *hdr; | |
386 | cb_desc *tcb_desc = (cb_desc *)(skb->cb + MAX_DEV_ADDR_SIZE); | |
387 | ||
388 | #if((LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,21)) || (OPENSUSE_SLED)) | |
389 | struct blkcipher_desc desc = {.tfm = tkey->tx_tfm_arc4}; | |
390 | int ret = 0; | |
391 | #endif | |
392 | u8 rc4key[16], *icv; | |
393 | u32 crc; | |
394 | struct scatterlist sg; | |
395 | ||
396 | if (skb_headroom(skb) < 8 || skb_tailroom(skb) < 4 || | |
397 | skb->len < hdr_len) | |
398 | return -1; | |
399 | ||
400 | hdr = (struct ieee80211_hdr_4addr *) skb->data; | |
401 | ||
402 | #if 0 | |
403 | printk("@@ tkey\n"); | |
404 | printk("%x|", ((u32*)tkey->key)[0]); | |
405 | printk("%x|", ((u32*)tkey->key)[1]); | |
406 | printk("%x|", ((u32*)tkey->key)[2]); | |
407 | printk("%x|", ((u32*)tkey->key)[3]); | |
408 | printk("%x|", ((u32*)tkey->key)[4]); | |
409 | printk("%x|", ((u32*)tkey->key)[5]); | |
410 | printk("%x|", ((u32*)tkey->key)[6]); | |
411 | printk("%x\n", ((u32*)tkey->key)[7]); | |
412 | #endif | |
413 | ||
414 | if (!tcb_desc->bHwSec) | |
415 | { | |
416 | if (!tkey->tx_phase1_done) { | |
417 | tkip_mixing_phase1(tkey->tx_ttak, tkey->key, hdr->addr2, | |
418 | tkey->tx_iv32); | |
419 | tkey->tx_phase1_done = 1; | |
420 | } | |
421 | tkip_mixing_phase2(rc4key, tkey->key, tkey->tx_ttak, tkey->tx_iv16); | |
422 | } | |
423 | else | |
424 | tkey->tx_phase1_done = 1; | |
425 | ||
426 | ||
427 | len = skb->len - hdr_len; | |
428 | pos = skb_push(skb, 8); | |
429 | memmove(pos, pos + 8, hdr_len); | |
430 | pos += hdr_len; | |
431 | ||
432 | if (tcb_desc->bHwSec) | |
433 | { | |
434 | *pos++ = Hi8(tkey->tx_iv16); | |
435 | *pos++ = (Hi8(tkey->tx_iv16) | 0x20) & 0x7F; | |
436 | *pos++ = Lo8(tkey->tx_iv16); | |
437 | } | |
438 | else | |
439 | { | |
440 | *pos++ = rc4key[0]; | |
441 | *pos++ = rc4key[1]; | |
442 | *pos++ = rc4key[2]; | |
443 | } | |
444 | ||
445 | *pos++ = (tkey->key_idx << 6) | (1 << 5) /* Ext IV included */; | |
446 | *pos++ = tkey->tx_iv32 & 0xff; | |
447 | *pos++ = (tkey->tx_iv32 >> 8) & 0xff; | |
448 | *pos++ = (tkey->tx_iv32 >> 16) & 0xff; | |
449 | *pos++ = (tkey->tx_iv32 >> 24) & 0xff; | |
450 | ||
451 | if (!tcb_desc->bHwSec) | |
452 | { | |
453 | icv = skb_put(skb, 4); | |
454 | #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0)) | |
455 | crc = ~crc32_le(~0, pos, len); | |
456 | #else | |
457 | crc = ~ether_crc_le(len, pos); | |
458 | #endif | |
459 | icv[0] = crc; | |
460 | icv[1] = crc >> 8; | |
461 | icv[2] = crc >> 16; | |
462 | icv[3] = crc >> 24; | |
463 | #if((LINUX_VERSION_CODE < KERNEL_VERSION(2,6,21)) && (!OPENSUSE_SLED)) | |
464 | crypto_cipher_setkey(tkey->tx_tfm_arc4, rc4key, 16); | |
465 | sg.page = virt_to_page(pos); | |
466 | sg.offset = offset_in_page(pos); | |
467 | sg.length = len + 4; | |
468 | crypto_cipher_encrypt(tkey->tx_tfm_arc4, &sg, &sg, len + 4); | |
469 | #else | |
470 | crypto_blkcipher_setkey(tkey->tx_tfm_arc4, rc4key, 16); | |
471 | #if(LINUX_VERSION_CODE < KERNEL_VERSION(2,6,24)) | |
472 | sg.page = virt_to_page(pos); | |
473 | sg.offset = offset_in_page(pos); | |
474 | sg.length = len + 4; | |
475 | #else | |
476 | sg_init_one(&sg, pos, len+4); | |
477 | #endif | |
478 | ret= crypto_blkcipher_encrypt(&desc, &sg, &sg, len + 4); | |
479 | #endif | |
480 | ||
481 | } | |
482 | ||
483 | tkey->tx_iv16++; | |
484 | if (tkey->tx_iv16 == 0) { | |
485 | tkey->tx_phase1_done = 0; | |
486 | tkey->tx_iv32++; | |
487 | } | |
488 | ||
489 | if (!tcb_desc->bHwSec) | |
490 | #if((LINUX_VERSION_CODE < KERNEL_VERSION(2,6,21)) && (!OPENSUSE_SLED)) | |
491 | return 0; | |
492 | #else | |
493 | return ret; | |
494 | #endif | |
495 | else | |
496 | return 0; | |
497 | ||
498 | ||
499 | } | |
500 | ||
501 | static int ieee80211_tkip_decrypt(struct sk_buff *skb, int hdr_len, void *priv) | |
502 | { | |
503 | struct ieee80211_tkip_data *tkey = priv; | |
504 | u8 keyidx, *pos; | |
505 | u32 iv32; | |
506 | u16 iv16; | |
507 | struct ieee80211_hdr_4addr *hdr; | |
508 | cb_desc *tcb_desc = (cb_desc *)(skb->cb + MAX_DEV_ADDR_SIZE); | |
509 | #if((LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,21)) || (OPENSUSE_SLED)) | |
510 | struct blkcipher_desc desc = {.tfm = tkey->rx_tfm_arc4}; | |
511 | #endif | |
512 | u8 rc4key[16]; | |
513 | u8 icv[4]; | |
514 | u32 crc; | |
515 | struct scatterlist sg; | |
516 | int plen; | |
517 | if (skb->len < hdr_len + 8 + 4) | |
518 | return -1; | |
519 | ||
520 | hdr = (struct ieee80211_hdr_4addr *) skb->data; | |
521 | pos = skb->data + hdr_len; | |
522 | keyidx = pos[3]; | |
523 | if (!(keyidx & (1 << 5))) { | |
524 | if (net_ratelimit()) { | |
525 | printk(KERN_DEBUG "TKIP: received packet without ExtIV" | |
526 | " flag from " MAC_FMT "\n", MAC_ARG(hdr->addr2)); | |
527 | } | |
528 | return -2; | |
529 | } | |
530 | keyidx >>= 6; | |
531 | if (tkey->key_idx != keyidx) { | |
532 | printk(KERN_DEBUG "TKIP: RX tkey->key_idx=%d frame " | |
533 | "keyidx=%d priv=%p\n", tkey->key_idx, keyidx, priv); | |
534 | return -6; | |
535 | } | |
536 | if (!tkey->key_set) { | |
537 | if (net_ratelimit()) { | |
538 | printk(KERN_DEBUG "TKIP: received packet from " MAC_FMT | |
539 | " with keyid=%d that does not have a configured" | |
540 | " key\n", MAC_ARG(hdr->addr2), keyidx); | |
541 | } | |
542 | return -3; | |
543 | } | |
544 | iv16 = (pos[0] << 8) | pos[2]; | |
545 | iv32 = pos[4] | (pos[5] << 8) | (pos[6] << 16) | (pos[7] << 24); | |
546 | pos += 8; | |
547 | ||
548 | if (!tcb_desc->bHwSec) | |
549 | { | |
550 | if (iv32 < tkey->rx_iv32 || | |
551 | (iv32 == tkey->rx_iv32 && iv16 <= tkey->rx_iv16)) { | |
552 | if (net_ratelimit()) { | |
553 | printk(KERN_DEBUG "TKIP: replay detected: STA=" MAC_FMT | |
554 | " previous TSC %08x%04x received TSC " | |
555 | "%08x%04x\n", MAC_ARG(hdr->addr2), | |
556 | tkey->rx_iv32, tkey->rx_iv16, iv32, iv16); | |
557 | } | |
558 | tkey->dot11RSNAStatsTKIPReplays++; | |
559 | return -4; | |
560 | } | |
561 | ||
562 | if (iv32 != tkey->rx_iv32 || !tkey->rx_phase1_done) { | |
563 | tkip_mixing_phase1(tkey->rx_ttak, tkey->key, hdr->addr2, iv32); | |
564 | tkey->rx_phase1_done = 1; | |
565 | } | |
566 | tkip_mixing_phase2(rc4key, tkey->key, tkey->rx_ttak, iv16); | |
567 | ||
568 | plen = skb->len - hdr_len - 12; | |
569 | ||
570 | #if((LINUX_VERSION_CODE < KERNEL_VERSION(2,6,21)) && (!OPENSUSE_SLED)) | |
571 | crypto_cipher_setkey(tkey->rx_tfm_arc4, rc4key, 16); | |
572 | sg.page = virt_to_page(pos); | |
573 | sg.offset = offset_in_page(pos); | |
574 | sg.length = plen + 4; | |
575 | crypto_cipher_decrypt(tkey->rx_tfm_arc4, &sg, &sg, plen + 4); | |
576 | #else | |
577 | crypto_blkcipher_setkey(tkey->rx_tfm_arc4, rc4key, 16); | |
578 | #if(LINUX_VERSION_CODE < KERNEL_VERSION(2,6,24)) | |
579 | sg.page = virt_to_page(pos); | |
580 | sg.offset = offset_in_page(pos); | |
581 | sg.length = plen + 4; | |
582 | #else | |
583 | sg_init_one(&sg, pos, plen+4); | |
584 | #endif | |
585 | if (crypto_blkcipher_decrypt(&desc, &sg, &sg, plen + 4)) { | |
586 | if (net_ratelimit()) { | |
587 | printk(KERN_DEBUG ": TKIP: failed to decrypt " | |
588 | "received packet from " MAC_FMT "\n", | |
589 | MAC_ARG(hdr->addr2)); | |
590 | } | |
591 | return -7; | |
592 | } | |
593 | #endif | |
594 | ||
595 | #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0)) | |
596 | crc = ~crc32_le(~0, pos, plen); | |
597 | #else | |
598 | crc = ~ether_crc_le(plen, pos); | |
599 | #endif | |
600 | icv[0] = crc; | |
601 | icv[1] = crc >> 8; | |
602 | icv[2] = crc >> 16; | |
603 | icv[3] = crc >> 24; | |
604 | ||
605 | if (memcmp(icv, pos + plen, 4) != 0) { | |
606 | if (iv32 != tkey->rx_iv32) { | |
607 | /* Previously cached Phase1 result was already lost, so | |
608 | * it needs to be recalculated for the next packet. */ | |
609 | tkey->rx_phase1_done = 0; | |
610 | } | |
611 | if (net_ratelimit()) { | |
612 | printk(KERN_DEBUG "TKIP: ICV error detected: STA=" | |
613 | MAC_FMT "\n", MAC_ARG(hdr->addr2)); | |
614 | } | |
615 | tkey->dot11RSNAStatsTKIPICVErrors++; | |
616 | return -5; | |
617 | } | |
618 | ||
619 | } | |
620 | ||
621 | /* Update real counters only after Michael MIC verification has | |
622 | * completed */ | |
623 | tkey->rx_iv32_new = iv32; | |
624 | tkey->rx_iv16_new = iv16; | |
625 | ||
626 | /* Remove IV and ICV */ | |
627 | memmove(skb->data + 8, skb->data, hdr_len); | |
628 | skb_pull(skb, 8); | |
629 | skb_trim(skb, skb->len - 4); | |
630 | ||
631 | //john's test | |
632 | #ifdef JOHN_DUMP | |
633 | if( ((u16*)skb->data)[0] & 0x4000){ | |
634 | printk("@@ rx decrypted skb->data"); | |
635 | int i; | |
636 | for(i=0;i<skb->len;i++){ | |
637 | if( (i%24)==0 ) printk("\n"); | |
638 | printk("%2x ", ((u8*)skb->data)[i]); | |
639 | } | |
640 | printk("\n"); | |
641 | } | |
642 | #endif /*JOHN_DUMP*/ | |
643 | return keyidx; | |
644 | } | |
645 | ||
646 | ||
647 | #if((LINUX_VERSION_CODE < KERNEL_VERSION(2,6,21)) && (!OPENSUSE_SLED)) | |
648 | static int michael_mic(struct crypto_tfm * tfm_michael, u8 *key, u8 *hdr, | |
649 | u8 *data, size_t data_len, u8 *mic) | |
650 | { | |
651 | struct scatterlist sg[2]; | |
652 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,20) | |
653 | struct hash_desc desc; | |
654 | int ret = 0; | |
655 | #endif | |
656 | ||
657 | if (tfm_michael == NULL){ | |
658 | printk(KERN_WARNING "michael_mic: tfm_michael == NULL\n"); | |
659 | return -1; | |
660 | } | |
661 | sg[0].page = virt_to_page(hdr); | |
662 | sg[0].offset = offset_in_page(hdr); | |
663 | sg[0].length = 16; | |
664 | ||
665 | sg[1].page = virt_to_page(data); | |
666 | sg[1].offset = offset_in_page(data); | |
667 | sg[1].length = data_len; | |
668 | ||
669 | ||
670 | #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,20) | |
671 | crypto_digest_init(tfm_michael); | |
672 | crypto_digest_setkey(tfm_michael, key, 8); | |
673 | crypto_digest_update(tfm_michael, sg, 2); | |
674 | crypto_digest_final(tfm_michael, mic); | |
675 | return 0; | |
676 | #else | |
677 | if (crypto_hash_setkey(tkey->tfm_michael, key, 8)) | |
678 | return -1; | |
679 | ||
680 | // return 0; | |
681 | desc.tfm = tkey->tfm_michael; | |
682 | desc.flags = 0; | |
683 | ret = crypto_hash_digest(&desc, sg, data_len + 16, mic); | |
684 | return ret; | |
685 | #endif | |
686 | } | |
687 | #else | |
688 | static int michael_mic(struct crypto_hash *tfm_michael, u8 * key, u8 * hdr, | |
689 | u8 * data, size_t data_len, u8 * mic) | |
690 | { | |
691 | struct hash_desc desc; | |
692 | struct scatterlist sg[2]; | |
693 | ||
694 | if (tfm_michael == NULL) { | |
695 | printk(KERN_WARNING "michael_mic: tfm_michael == NULL\n"); | |
696 | return -1; | |
697 | } | |
698 | #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,24) | |
699 | sg[0].page = virt_to_page(hdr); | |
700 | sg[0].offset = offset_in_page(hdr); | |
701 | sg[0].length = 16; | |
702 | ||
703 | sg[1].page = virt_to_page(data); | |
704 | sg[1].offset = offset_in_page(data); | |
705 | sg[1].length = data_len; | |
706 | #else | |
707 | sg_init_table(sg, 2); | |
708 | sg_set_buf(&sg[0], hdr, 16); | |
709 | sg_set_buf(&sg[1], data, data_len); | |
710 | #endif | |
711 | ||
712 | if (crypto_hash_setkey(tfm_michael, key, 8)) | |
713 | return -1; | |
714 | ||
715 | desc.tfm = tfm_michael; | |
716 | desc.flags = 0; | |
717 | return crypto_hash_digest(&desc, sg, data_len + 16, mic); | |
718 | } | |
719 | #endif | |
720 | ||
721 | ||
722 | ||
723 | static void michael_mic_hdr(struct sk_buff *skb, u8 *hdr) | |
724 | { | |
725 | struct ieee80211_hdr_4addr *hdr11; | |
726 | ||
727 | hdr11 = (struct ieee80211_hdr_4addr *) skb->data; | |
728 | switch (le16_to_cpu(hdr11->frame_ctl) & | |
729 | (IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS)) { | |
730 | case IEEE80211_FCTL_TODS: | |
731 | memcpy(hdr, hdr11->addr3, ETH_ALEN); /* DA */ | |
732 | memcpy(hdr + ETH_ALEN, hdr11->addr2, ETH_ALEN); /* SA */ | |
733 | break; | |
734 | case IEEE80211_FCTL_FROMDS: | |
735 | memcpy(hdr, hdr11->addr1, ETH_ALEN); /* DA */ | |
736 | memcpy(hdr + ETH_ALEN, hdr11->addr3, ETH_ALEN); /* SA */ | |
737 | break; | |
738 | case IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS: | |
739 | memcpy(hdr, hdr11->addr3, ETH_ALEN); /* DA */ | |
740 | memcpy(hdr + ETH_ALEN, hdr11->addr4, ETH_ALEN); /* SA */ | |
741 | break; | |
742 | case 0: | |
743 | memcpy(hdr, hdr11->addr1, ETH_ALEN); /* DA */ | |
744 | memcpy(hdr + ETH_ALEN, hdr11->addr2, ETH_ALEN); /* SA */ | |
745 | break; | |
746 | } | |
747 | ||
748 | hdr[12] = 0; /* priority */ | |
749 | ||
750 | hdr[13] = hdr[14] = hdr[15] = 0; /* reserved */ | |
751 | } | |
752 | ||
753 | ||
754 | static int ieee80211_michael_mic_add(struct sk_buff *skb, int hdr_len, void *priv) | |
755 | { | |
756 | struct ieee80211_tkip_data *tkey = priv; | |
757 | u8 *pos; | |
758 | struct ieee80211_hdr_4addr *hdr; | |
759 | ||
760 | hdr = (struct ieee80211_hdr_4addr *) skb->data; | |
761 | ||
762 | if (skb_tailroom(skb) < 8 || skb->len < hdr_len) { | |
763 | printk(KERN_DEBUG "Invalid packet for Michael MIC add " | |
764 | "(tailroom=%d hdr_len=%d skb->len=%d)\n", | |
765 | skb_tailroom(skb), hdr_len, skb->len); | |
766 | return -1; | |
767 | } | |
768 | ||
769 | michael_mic_hdr(skb, tkey->tx_hdr); | |
770 | ||
771 | // { david, 2006.9.1 | |
772 | // fix the wpa process with wmm enabled. | |
773 | if(IEEE80211_QOS_HAS_SEQ(le16_to_cpu(hdr->frame_ctl))) { | |
774 | tkey->tx_hdr[12] = *(skb->data + hdr_len - 2) & 0x07; | |
775 | } | |
776 | // } | |
777 | pos = skb_put(skb, 8); | |
778 | #if((LINUX_VERSION_CODE < KERNEL_VERSION(2,6,21)) && (!OPENSUSE_SLED)) | |
779 | if (michael_mic(tkey->tx_tfm_michael, &tkey->key[16], tkey->tx_hdr, | |
780 | skb->data + hdr_len, skb->len - 8 - hdr_len, pos)) | |
781 | #else | |
782 | if (michael_mic(tkey->tx_tfm_michael, &tkey->key[16], tkey->tx_hdr, | |
783 | skb->data + hdr_len, skb->len - 8 - hdr_len, pos)) | |
784 | #endif | |
785 | return -1; | |
786 | ||
787 | return 0; | |
788 | } | |
789 | ||
790 | ||
791 | #if WIRELESS_EXT >= 18 | |
792 | static void ieee80211_michael_mic_failure(struct net_device *dev, | |
793 | struct ieee80211_hdr_4addr *hdr, | |
794 | int keyidx) | |
795 | { | |
796 | union iwreq_data wrqu; | |
797 | struct iw_michaelmicfailure ev; | |
798 | ||
799 | /* TODO: needed parameters: count, keyid, key type, TSC */ | |
800 | memset(&ev, 0, sizeof(ev)); | |
801 | ev.flags = keyidx & IW_MICFAILURE_KEY_ID; | |
802 | if (hdr->addr1[0] & 0x01) | |
803 | ev.flags |= IW_MICFAILURE_GROUP; | |
804 | else | |
805 | ev.flags |= IW_MICFAILURE_PAIRWISE; | |
806 | ev.src_addr.sa_family = ARPHRD_ETHER; | |
807 | memcpy(ev.src_addr.sa_data, hdr->addr2, ETH_ALEN); | |
808 | memset(&wrqu, 0, sizeof(wrqu)); | |
809 | wrqu.data.length = sizeof(ev); | |
810 | wireless_send_event(dev, IWEVMICHAELMICFAILURE, &wrqu, (char *) &ev); | |
811 | } | |
812 | #elif WIRELESS_EXT >= 15 | |
813 | static void ieee80211_michael_mic_failure(struct net_device *dev, | |
814 | struct ieee80211_hdr_4addr *hdr, | |
815 | int keyidx) | |
816 | { | |
817 | union iwreq_data wrqu; | |
818 | char buf[128]; | |
819 | ||
820 | /* TODO: needed parameters: count, keyid, key type, TSC */ | |
821 | sprintf(buf, "MLME-MICHAELMICFAILURE.indication(keyid=%d %scast addr=" | |
822 | MAC_FMT ")", keyidx, hdr->addr1[0] & 0x01 ? "broad" : "uni", | |
823 | MAC_ARG(hdr->addr2)); | |
824 | memset(&wrqu, 0, sizeof(wrqu)); | |
825 | wrqu.data.length = strlen(buf); | |
826 | wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf); | |
827 | } | |
828 | #else /* WIRELESS_EXT >= 15 */ | |
829 | static inline void ieee80211_michael_mic_failure(struct net_device *dev, | |
830 | struct ieee80211_hdr_4addr *hdr, | |
831 | int keyidx) | |
832 | { | |
833 | } | |
834 | #endif /* WIRELESS_EXT >= 15 */ | |
835 | ||
836 | static int ieee80211_michael_mic_verify(struct sk_buff *skb, int keyidx, | |
837 | int hdr_len, void *priv) | |
838 | { | |
839 | struct ieee80211_tkip_data *tkey = priv; | |
840 | u8 mic[8]; | |
841 | struct ieee80211_hdr_4addr *hdr; | |
842 | ||
843 | hdr = (struct ieee80211_hdr_4addr *) skb->data; | |
844 | ||
845 | if (!tkey->key_set) | |
846 | return -1; | |
847 | ||
848 | michael_mic_hdr(skb, tkey->rx_hdr); | |
849 | // { david, 2006.9.1 | |
850 | // fix the wpa process with wmm enabled. | |
851 | if(IEEE80211_QOS_HAS_SEQ(le16_to_cpu(hdr->frame_ctl))) { | |
852 | tkey->rx_hdr[12] = *(skb->data + hdr_len - 2) & 0x07; | |
853 | } | |
854 | // } | |
855 | ||
856 | #if((LINUX_VERSION_CODE < KERNEL_VERSION(2,6,21)) && (!OPENSUSE_SLED)) | |
857 | if (michael_mic(tkey->rx_tfm_michael, &tkey->key[24], tkey->rx_hdr, | |
858 | skb->data + hdr_len, skb->len - 8 - hdr_len, mic)) | |
859 | #else | |
860 | if (michael_mic(tkey->rx_tfm_michael, &tkey->key[24], tkey->rx_hdr, | |
861 | skb->data + hdr_len, skb->len - 8 - hdr_len, mic)) | |
862 | #endif | |
863 | return -1; | |
864 | if (memcmp(mic, skb->data + skb->len - 8, 8) != 0) { | |
865 | struct ieee80211_hdr_4addr *hdr; | |
866 | hdr = (struct ieee80211_hdr_4addr *) skb->data; | |
867 | printk(KERN_DEBUG "%s: Michael MIC verification failed for " | |
868 | "MSDU from " MAC_FMT " keyidx=%d\n", | |
869 | skb->dev ? skb->dev->name : "N/A", MAC_ARG(hdr->addr2), | |
870 | keyidx); | |
871 | if (skb->dev) | |
872 | ieee80211_michael_mic_failure(skb->dev, hdr, keyidx); | |
873 | tkey->dot11RSNAStatsTKIPLocalMICFailures++; | |
874 | return -1; | |
875 | } | |
876 | ||
877 | /* Update TSC counters for RX now that the packet verification has | |
878 | * completed. */ | |
879 | tkey->rx_iv32 = tkey->rx_iv32_new; | |
880 | tkey->rx_iv16 = tkey->rx_iv16_new; | |
881 | ||
882 | skb_trim(skb, skb->len - 8); | |
883 | ||
884 | return 0; | |
885 | } | |
886 | ||
887 | ||
888 | static int ieee80211_tkip_set_key(void *key, int len, u8 *seq, void *priv) | |
889 | { | |
890 | struct ieee80211_tkip_data *tkey = priv; | |
891 | int keyidx; | |
892 | #if((LINUX_VERSION_CODE < KERNEL_VERSION(2,6,21)) && (!OPENSUSE_SLED)) | |
893 | struct crypto_tfm *tfm = tkey->tx_tfm_michael; | |
894 | struct crypto_tfm *tfm2 = tkey->tx_tfm_arc4; | |
895 | struct crypto_tfm *tfm3 = tkey->rx_tfm_michael; | |
896 | struct crypto_tfm *tfm4 = tkey->rx_tfm_arc4; | |
897 | #else | |
898 | struct crypto_hash *tfm = tkey->tx_tfm_michael; | |
899 | struct crypto_blkcipher *tfm2 = tkey->tx_tfm_arc4; | |
900 | struct crypto_hash *tfm3 = tkey->rx_tfm_michael; | |
901 | struct crypto_blkcipher *tfm4 = tkey->rx_tfm_arc4; | |
902 | #endif | |
903 | ||
904 | keyidx = tkey->key_idx; | |
905 | memset(tkey, 0, sizeof(*tkey)); | |
906 | tkey->key_idx = keyidx; | |
907 | #if((LINUX_VERSION_CODE < KERNEL_VERSION(2,6,21)) && (!OPENSUSE_SLED)) | |
908 | tkey->tx_tfm_michael = tfm; | |
909 | tkey->tx_tfm_arc4 = tfm2; | |
910 | tkey->rx_tfm_michael = tfm3; | |
911 | tkey->rx_tfm_arc4 = tfm4; | |
912 | #else | |
913 | tkey->tx_tfm_michael = tfm; | |
914 | tkey->tx_tfm_arc4 = tfm2; | |
915 | tkey->rx_tfm_michael = tfm3; | |
916 | tkey->rx_tfm_arc4 = tfm4; | |
917 | #endif | |
918 | ||
919 | if (len == TKIP_KEY_LEN) { | |
920 | memcpy(tkey->key, key, TKIP_KEY_LEN); | |
921 | tkey->key_set = 1; | |
922 | tkey->tx_iv16 = 1; /* TSC is initialized to 1 */ | |
923 | if (seq) { | |
924 | tkey->rx_iv32 = (seq[5] << 24) | (seq[4] << 16) | | |
925 | (seq[3] << 8) | seq[2]; | |
926 | tkey->rx_iv16 = (seq[1] << 8) | seq[0]; | |
927 | } | |
928 | } else if (len == 0) | |
929 | tkey->key_set = 0; | |
930 | else | |
931 | return -1; | |
932 | ||
933 | return 0; | |
934 | } | |
935 | ||
936 | ||
937 | static int ieee80211_tkip_get_key(void *key, int len, u8 *seq, void *priv) | |
938 | { | |
939 | struct ieee80211_tkip_data *tkey = priv; | |
940 | ||
941 | if (len < TKIP_KEY_LEN) | |
942 | return -1; | |
943 | ||
944 | if (!tkey->key_set) | |
945 | return 0; | |
946 | memcpy(key, tkey->key, TKIP_KEY_LEN); | |
947 | ||
948 | if (seq) { | |
949 | /* Return the sequence number of the last transmitted frame. */ | |
950 | u16 iv16 = tkey->tx_iv16; | |
951 | u32 iv32 = tkey->tx_iv32; | |
952 | if (iv16 == 0) | |
953 | iv32--; | |
954 | iv16--; | |
955 | seq[0] = tkey->tx_iv16; | |
956 | seq[1] = tkey->tx_iv16 >> 8; | |
957 | seq[2] = tkey->tx_iv32; | |
958 | seq[3] = tkey->tx_iv32 >> 8; | |
959 | seq[4] = tkey->tx_iv32 >> 16; | |
960 | seq[5] = tkey->tx_iv32 >> 24; | |
961 | } | |
962 | ||
963 | return TKIP_KEY_LEN; | |
964 | } | |
965 | ||
966 | ||
967 | static char * ieee80211_tkip_print_stats(char *p, void *priv) | |
968 | { | |
969 | struct ieee80211_tkip_data *tkip = priv; | |
970 | p += sprintf(p, "key[%d] alg=TKIP key_set=%d " | |
971 | "tx_pn=%02x%02x%02x%02x%02x%02x " | |
972 | "rx_pn=%02x%02x%02x%02x%02x%02x " | |
973 | "replays=%d icv_errors=%d local_mic_failures=%d\n", | |
974 | tkip->key_idx, tkip->key_set, | |
975 | (tkip->tx_iv32 >> 24) & 0xff, | |
976 | (tkip->tx_iv32 >> 16) & 0xff, | |
977 | (tkip->tx_iv32 >> 8) & 0xff, | |
978 | tkip->tx_iv32 & 0xff, | |
979 | (tkip->tx_iv16 >> 8) & 0xff, | |
980 | tkip->tx_iv16 & 0xff, | |
981 | (tkip->rx_iv32 >> 24) & 0xff, | |
982 | (tkip->rx_iv32 >> 16) & 0xff, | |
983 | (tkip->rx_iv32 >> 8) & 0xff, | |
984 | tkip->rx_iv32 & 0xff, | |
985 | (tkip->rx_iv16 >> 8) & 0xff, | |
986 | tkip->rx_iv16 & 0xff, | |
987 | tkip->dot11RSNAStatsTKIPReplays, | |
988 | tkip->dot11RSNAStatsTKIPICVErrors, | |
989 | tkip->dot11RSNAStatsTKIPLocalMICFailures); | |
990 | return p; | |
991 | } | |
992 | ||
993 | ||
994 | static struct ieee80211_crypto_ops ieee80211_crypt_tkip = { | |
995 | .name = "TKIP", | |
996 | .init = ieee80211_tkip_init, | |
997 | .deinit = ieee80211_tkip_deinit, | |
998 | .encrypt_mpdu = ieee80211_tkip_encrypt, | |
999 | .decrypt_mpdu = ieee80211_tkip_decrypt, | |
1000 | .encrypt_msdu = ieee80211_michael_mic_add, | |
1001 | .decrypt_msdu = ieee80211_michael_mic_verify, | |
1002 | .set_key = ieee80211_tkip_set_key, | |
1003 | .get_key = ieee80211_tkip_get_key, | |
1004 | .print_stats = ieee80211_tkip_print_stats, | |
1005 | .extra_prefix_len = 4 + 4, /* IV + ExtIV */ | |
1006 | .extra_postfix_len = 8 + 4, /* MIC + ICV */ | |
1007 | .owner = THIS_MODULE, | |
1008 | }; | |
1009 | ||
1010 | ||
1011 | static int __init ieee80211_crypto_tkip_init(void) | |
1012 | { | |
1013 | return ieee80211_register_crypto_ops(&ieee80211_crypt_tkip); | |
1014 | } | |
1015 | ||
1016 | ||
1017 | static void __exit ieee80211_crypto_tkip_exit(void) | |
1018 | { | |
1019 | ieee80211_unregister_crypto_ops(&ieee80211_crypt_tkip); | |
1020 | } | |
1021 | ||
1022 | void ieee80211_tkip_null(void) | |
1023 | { | |
1024 | // printk("============>%s()\n", __FUNCTION__); | |
1025 | return; | |
1026 | } | |
1027 | #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0)) | |
1028 | EXPORT_SYMBOL(ieee80211_tkip_null); | |
1029 | #else | |
1030 | EXPORT_SYMBOL_NOVERS(ieee80211_tkip_null); | |
1031 | #endif | |
1032 | ||
1033 | module_init(ieee80211_crypto_tkip_init); | |
1034 | module_exit(ieee80211_crypto_tkip_exit); |