Commit | Line | Data |
---|---|---|
b453872c JG |
1 | /* |
2 | * Host AP crypt: host-based CCMP encryption implementation for Host AP driver | |
3 | * | |
85d32e7b | 4 | * Copyright (c) 2003-2004, Jouni Malinen <j@w1.fi> |
b453872c JG |
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 | ||
172589cc | 12 | #include <linux/kernel.h> |
f12cc209 | 13 | #include <linux/err.h> |
b453872c JG |
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 | #include <linux/wireless.h> | |
24 | ||
25 | #include <net/ieee80211.h> | |
26 | ||
b453872c | 27 | #include <linux/crypto.h> |
b453872c JG |
28 | |
29 | MODULE_AUTHOR("Jouni Malinen"); | |
30 | MODULE_DESCRIPTION("Host AP crypt: CCMP"); | |
31 | MODULE_LICENSE("GPL"); | |
32 | ||
33 | #define AES_BLOCK_LEN 16 | |
34 | #define CCMP_HDR_LEN 8 | |
35 | #define CCMP_MIC_LEN 8 | |
36 | #define CCMP_TK_LEN 16 | |
37 | #define CCMP_PN_LEN 6 | |
38 | ||
39 | struct ieee80211_ccmp_data { | |
40 | u8 key[CCMP_TK_LEN]; | |
41 | int key_set; | |
42 | ||
43 | u8 tx_pn[CCMP_PN_LEN]; | |
44 | u8 rx_pn[CCMP_PN_LEN]; | |
45 | ||
46 | u32 dot11RSNAStatsCCMPFormatErrors; | |
47 | u32 dot11RSNAStatsCCMPReplays; | |
48 | u32 dot11RSNAStatsCCMPDecryptErrors; | |
49 | ||
50 | int key_idx; | |
51 | ||
f12cc209 | 52 | struct crypto_cipher *tfm; |
b453872c JG |
53 | |
54 | /* scratch buffers for virt_to_page() (crypto API) */ | |
55 | u8 tx_b0[AES_BLOCK_LEN], tx_b[AES_BLOCK_LEN], | |
0edd5b44 | 56 | tx_e[AES_BLOCK_LEN], tx_s0[AES_BLOCK_LEN]; |
b453872c JG |
57 | u8 rx_b0[AES_BLOCK_LEN], rx_b[AES_BLOCK_LEN], rx_a[AES_BLOCK_LEN]; |
58 | }; | |
59 | ||
f12cc209 HX |
60 | static inline void ieee80211_ccmp_aes_encrypt(struct crypto_cipher *tfm, |
61 | const u8 pt[16], u8 ct[16]) | |
b453872c | 62 | { |
f12cc209 | 63 | crypto_cipher_encrypt_one(tfm, ct, pt); |
b453872c JG |
64 | } |
65 | ||
6eb6edf0 | 66 | static void *ieee80211_ccmp_init(int key_idx) |
b453872c JG |
67 | { |
68 | struct ieee80211_ccmp_data *priv; | |
69 | ||
0da974f4 | 70 | priv = kzalloc(sizeof(*priv), GFP_ATOMIC); |
b453872c JG |
71 | if (priv == NULL) |
72 | goto fail; | |
b453872c JG |
73 | priv->key_idx = key_idx; |
74 | ||
f12cc209 HX |
75 | priv->tfm = crypto_alloc_cipher("aes", 0, CRYPTO_ALG_ASYNC); |
76 | if (IS_ERR(priv->tfm)) { | |
b453872c JG |
77 | printk(KERN_DEBUG "ieee80211_crypt_ccmp: could not allocate " |
78 | "crypto API aes\n"); | |
f12cc209 | 79 | priv->tfm = NULL; |
b453872c JG |
80 | goto fail; |
81 | } | |
82 | ||
83 | return priv; | |
84 | ||
0edd5b44 | 85 | fail: |
b453872c JG |
86 | if (priv) { |
87 | if (priv->tfm) | |
f12cc209 | 88 | crypto_free_cipher(priv->tfm); |
b453872c JG |
89 | kfree(priv); |
90 | } | |
91 | ||
92 | return NULL; | |
93 | } | |
94 | ||
b453872c JG |
95 | static void ieee80211_ccmp_deinit(void *priv) |
96 | { | |
97 | struct ieee80211_ccmp_data *_priv = priv; | |
98 | if (_priv && _priv->tfm) | |
f12cc209 | 99 | crypto_free_cipher(_priv->tfm); |
b453872c JG |
100 | kfree(priv); |
101 | } | |
102 | ||
0edd5b44 | 103 | static inline void xor_block(u8 * b, u8 * a, size_t len) |
b453872c JG |
104 | { |
105 | int i; | |
106 | for (i = 0; i < len; i++) | |
107 | b[i] ^= a[i]; | |
108 | } | |
109 | ||
f12cc209 | 110 | static void ccmp_init_blocks(struct crypto_cipher *tfm, |
ee34af37 | 111 | struct ieee80211_hdr_4addr *hdr, |
0edd5b44 | 112 | u8 * pn, size_t dlen, u8 * b0, u8 * auth, u8 * s0) |
b453872c JG |
113 | { |
114 | u8 *pos, qc = 0; | |
115 | size_t aad_len; | |
116 | u16 fc; | |
117 | int a4_included, qc_included; | |
118 | u8 aad[2 * AES_BLOCK_LEN]; | |
119 | ||
120 | fc = le16_to_cpu(hdr->frame_ctl); | |
121 | a4_included = ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) == | |
122 | (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)); | |
123 | qc_included = ((WLAN_FC_GET_TYPE(fc) == IEEE80211_FTYPE_DATA) && | |
0df78612 | 124 | (WLAN_FC_GET_STYPE(fc) & IEEE80211_STYPE_QOS_DATA)); |
b453872c JG |
125 | aad_len = 22; |
126 | if (a4_included) | |
127 | aad_len += 6; | |
128 | if (qc_included) { | |
0edd5b44 | 129 | pos = (u8 *) & hdr->addr4; |
b453872c JG |
130 | if (a4_included) |
131 | pos += 6; | |
132 | qc = *pos & 0x0f; | |
133 | aad_len += 2; | |
134 | } | |
135 | ||
136 | /* CCM Initial Block: | |
137 | * Flag (Include authentication header, M=3 (8-octet MIC), | |
138 | * L=1 (2-octet Dlen)) | |
139 | * Nonce: 0x00 | A2 | PN | |
140 | * Dlen */ | |
141 | b0[0] = 0x59; | |
142 | b0[1] = qc; | |
143 | memcpy(b0 + 2, hdr->addr2, ETH_ALEN); | |
144 | memcpy(b0 + 8, pn, CCMP_PN_LEN); | |
145 | b0[14] = (dlen >> 8) & 0xff; | |
146 | b0[15] = dlen & 0xff; | |
147 | ||
148 | /* AAD: | |
149 | * FC with bits 4..6 and 11..13 masked to zero; 14 is always one | |
150 | * A1 | A2 | A3 | |
151 | * SC with bits 4..15 (seq#) masked to zero | |
152 | * A4 (if present) | |
153 | * QC (if present) | |
154 | */ | |
155 | pos = (u8 *) hdr; | |
0edd5b44 | 156 | aad[0] = 0; /* aad_len >> 8 */ |
b453872c JG |
157 | aad[1] = aad_len & 0xff; |
158 | aad[2] = pos[0] & 0x8f; | |
159 | aad[3] = pos[1] & 0xc7; | |
160 | memcpy(aad + 4, hdr->addr1, 3 * ETH_ALEN); | |
0edd5b44 | 161 | pos = (u8 *) & hdr->seq_ctl; |
b453872c | 162 | aad[22] = pos[0] & 0x0f; |
0edd5b44 | 163 | aad[23] = 0; /* all bits masked */ |
b453872c JG |
164 | memset(aad + 24, 0, 8); |
165 | if (a4_included) | |
166 | memcpy(aad + 24, hdr->addr4, ETH_ALEN); | |
167 | if (qc_included) { | |
168 | aad[a4_included ? 30 : 24] = qc; | |
169 | /* rest of QC masked */ | |
170 | } | |
171 | ||
172 | /* Start with the first block and AAD */ | |
173 | ieee80211_ccmp_aes_encrypt(tfm, b0, auth); | |
174 | xor_block(auth, aad, AES_BLOCK_LEN); | |
175 | ieee80211_ccmp_aes_encrypt(tfm, auth, auth); | |
176 | xor_block(auth, &aad[AES_BLOCK_LEN], AES_BLOCK_LEN); | |
177 | ieee80211_ccmp_aes_encrypt(tfm, auth, auth); | |
178 | b0[0] &= 0x07; | |
179 | b0[14] = b0[15] = 0; | |
180 | ieee80211_ccmp_aes_encrypt(tfm, b0, s0); | |
181 | } | |
182 | ||
9184d934 ZY |
183 | static int ieee80211_ccmp_hdr(struct sk_buff *skb, int hdr_len, |
184 | u8 *aeskey, int keylen, void *priv) | |
b453872c JG |
185 | { |
186 | struct ieee80211_ccmp_data *key = priv; | |
31b59eae JK |
187 | int i; |
188 | u8 *pos; | |
b453872c | 189 | |
31b59eae | 190 | if (skb_headroom(skb) < CCMP_HDR_LEN || skb->len < hdr_len) |
b453872c JG |
191 | return -1; |
192 | ||
9184d934 ZY |
193 | if (aeskey != NULL && keylen >= CCMP_TK_LEN) |
194 | memcpy(aeskey, key->key, CCMP_TK_LEN); | |
195 | ||
b453872c JG |
196 | pos = skb_push(skb, CCMP_HDR_LEN); |
197 | memmove(pos, pos + CCMP_HDR_LEN, hdr_len); | |
198 | pos += hdr_len; | |
b453872c JG |
199 | |
200 | i = CCMP_PN_LEN - 1; | |
201 | while (i >= 0) { | |
202 | key->tx_pn[i]++; | |
203 | if (key->tx_pn[i] != 0) | |
204 | break; | |
205 | i--; | |
206 | } | |
207 | ||
208 | *pos++ = key->tx_pn[5]; | |
209 | *pos++ = key->tx_pn[4]; | |
210 | *pos++ = 0; | |
0edd5b44 | 211 | *pos++ = (key->key_idx << 6) | (1 << 5) /* Ext IV included */ ; |
b453872c JG |
212 | *pos++ = key->tx_pn[3]; |
213 | *pos++ = key->tx_pn[2]; | |
214 | *pos++ = key->tx_pn[1]; | |
215 | *pos++ = key->tx_pn[0]; | |
216 | ||
31b59eae JK |
217 | return CCMP_HDR_LEN; |
218 | } | |
219 | ||
220 | static int ieee80211_ccmp_encrypt(struct sk_buff *skb, int hdr_len, void *priv) | |
221 | { | |
222 | struct ieee80211_ccmp_data *key = priv; | |
223 | int data_len, i, blocks, last, len; | |
224 | u8 *pos, *mic; | |
225 | struct ieee80211_hdr_4addr *hdr; | |
226 | u8 *b0 = key->tx_b0; | |
227 | u8 *b = key->tx_b; | |
228 | u8 *e = key->tx_e; | |
229 | u8 *s0 = key->tx_s0; | |
230 | ||
231 | if (skb_tailroom(skb) < CCMP_MIC_LEN || skb->len < hdr_len) | |
232 | return -1; | |
233 | ||
234 | data_len = skb->len - hdr_len; | |
9184d934 | 235 | len = ieee80211_ccmp_hdr(skb, hdr_len, NULL, 0, priv); |
31b59eae JK |
236 | if (len < 0) |
237 | return -1; | |
238 | ||
239 | pos = skb->data + hdr_len + CCMP_HDR_LEN; | |
240 | mic = skb_put(skb, CCMP_MIC_LEN); | |
ee34af37 | 241 | hdr = (struct ieee80211_hdr_4addr *)skb->data; |
b453872c JG |
242 | ccmp_init_blocks(key->tfm, hdr, key->tx_pn, data_len, b0, b, s0); |
243 | ||
172589cc | 244 | blocks = DIV_ROUND_UP(data_len, AES_BLOCK_LEN); |
b453872c JG |
245 | last = data_len % AES_BLOCK_LEN; |
246 | ||
247 | for (i = 1; i <= blocks; i++) { | |
248 | len = (i == blocks && last) ? last : AES_BLOCK_LEN; | |
249 | /* Authentication */ | |
250 | xor_block(b, pos, len); | |
251 | ieee80211_ccmp_aes_encrypt(key->tfm, b, b); | |
252 | /* Encryption, with counter */ | |
253 | b0[14] = (i >> 8) & 0xff; | |
254 | b0[15] = i & 0xff; | |
255 | ieee80211_ccmp_aes_encrypt(key->tfm, b0, e); | |
256 | xor_block(pos, e, len); | |
257 | pos += len; | |
258 | } | |
259 | ||
260 | for (i = 0; i < CCMP_MIC_LEN; i++) | |
261 | mic[i] = b[i] ^ s0[i]; | |
262 | ||
263 | return 0; | |
264 | } | |
265 | ||
b4328d87 ZY |
266 | /* |
267 | * deal with seq counter wrapping correctly. | |
268 | * refer to timer_after() for jiffies wrapping handling | |
269 | */ | |
270 | static inline int ccmp_replay_check(u8 *pn_n, u8 *pn_o) | |
271 | { | |
272 | u32 iv32_n, iv16_n; | |
273 | u32 iv32_o, iv16_o; | |
274 | ||
275 | iv32_n = (pn_n[0] << 24) | (pn_n[1] << 16) | (pn_n[2] << 8) | pn_n[3]; | |
276 | iv16_n = (pn_n[4] << 8) | pn_n[5]; | |
277 | ||
278 | iv32_o = (pn_o[0] << 24) | (pn_o[1] << 16) | (pn_o[2] << 8) | pn_o[3]; | |
279 | iv16_o = (pn_o[4] << 8) | pn_o[5]; | |
280 | ||
281 | if ((s32)iv32_n - (s32)iv32_o < 0 || | |
282 | (iv32_n == iv32_o && iv16_n <= iv16_o)) | |
283 | return 1; | |
284 | return 0; | |
285 | } | |
286 | ||
b453872c JG |
287 | static int ieee80211_ccmp_decrypt(struct sk_buff *skb, int hdr_len, void *priv) |
288 | { | |
289 | struct ieee80211_ccmp_data *key = priv; | |
290 | u8 keyidx, *pos; | |
ee34af37 | 291 | struct ieee80211_hdr_4addr *hdr; |
b453872c JG |
292 | u8 *b0 = key->rx_b0; |
293 | u8 *b = key->rx_b; | |
294 | u8 *a = key->rx_a; | |
295 | u8 pn[6]; | |
296 | int i, blocks, last, len; | |
297 | size_t data_len = skb->len - hdr_len - CCMP_HDR_LEN - CCMP_MIC_LEN; | |
298 | u8 *mic = skb->data + skb->len - CCMP_MIC_LEN; | |
0795af57 | 299 | DECLARE_MAC_BUF(mac); |
b453872c JG |
300 | |
301 | if (skb->len < hdr_len + CCMP_HDR_LEN + CCMP_MIC_LEN) { | |
302 | key->dot11RSNAStatsCCMPFormatErrors++; | |
303 | return -1; | |
304 | } | |
305 | ||
ee34af37 | 306 | hdr = (struct ieee80211_hdr_4addr *)skb->data; |
b453872c JG |
307 | pos = skb->data + hdr_len; |
308 | keyidx = pos[3]; | |
309 | if (!(keyidx & (1 << 5))) { | |
310 | if (net_ratelimit()) { | |
311 | printk(KERN_DEBUG "CCMP: received packet without ExtIV" | |
0795af57 | 312 | " flag from %s\n", print_mac(mac, hdr->addr2)); |
b453872c JG |
313 | } |
314 | key->dot11RSNAStatsCCMPFormatErrors++; | |
315 | return -2; | |
316 | } | |
317 | keyidx >>= 6; | |
318 | if (key->key_idx != keyidx) { | |
319 | printk(KERN_DEBUG "CCMP: RX tkey->key_idx=%d frame " | |
320 | "keyidx=%d priv=%p\n", key->key_idx, keyidx, priv); | |
321 | return -6; | |
322 | } | |
323 | if (!key->key_set) { | |
324 | if (net_ratelimit()) { | |
0795af57 | 325 | printk(KERN_DEBUG "CCMP: received packet from %s" |
b453872c | 326 | " with keyid=%d that does not have a configured" |
0795af57 | 327 | " key\n", print_mac(mac, hdr->addr2), keyidx); |
b453872c JG |
328 | } |
329 | return -3; | |
330 | } | |
331 | ||
332 | pn[0] = pos[7]; | |
333 | pn[1] = pos[6]; | |
334 | pn[2] = pos[5]; | |
335 | pn[3] = pos[4]; | |
336 | pn[4] = pos[1]; | |
337 | pn[5] = pos[0]; | |
338 | pos += 8; | |
339 | ||
b4328d87 | 340 | if (ccmp_replay_check(pn, key->rx_pn)) { |
92468c53 | 341 | if (ieee80211_ratelimit_debug(IEEE80211_DL_DROP)) { |
0795af57 JP |
342 | IEEE80211_DEBUG_DROP("CCMP: replay detected: STA=%s " |
343 | "previous PN %02x%02x%02x%02x%02x%02x " | |
344 | "received PN %02x%02x%02x%02x%02x%02x\n", | |
345 | print_mac(mac, hdr->addr2), | |
346 | key->rx_pn[0], key->rx_pn[1], key->rx_pn[2], | |
347 | key->rx_pn[3], key->rx_pn[4], key->rx_pn[5], | |
348 | pn[0], pn[1], pn[2], pn[3], pn[4], pn[5]); | |
b453872c JG |
349 | } |
350 | key->dot11RSNAStatsCCMPReplays++; | |
351 | return -4; | |
352 | } | |
353 | ||
354 | ccmp_init_blocks(key->tfm, hdr, pn, data_len, b0, a, b); | |
355 | xor_block(mic, b, CCMP_MIC_LEN); | |
356 | ||
172589cc | 357 | blocks = DIV_ROUND_UP(data_len, AES_BLOCK_LEN); |
b453872c JG |
358 | last = data_len % AES_BLOCK_LEN; |
359 | ||
360 | for (i = 1; i <= blocks; i++) { | |
361 | len = (i == blocks && last) ? last : AES_BLOCK_LEN; | |
362 | /* Decrypt, with counter */ | |
363 | b0[14] = (i >> 8) & 0xff; | |
364 | b0[15] = i & 0xff; | |
365 | ieee80211_ccmp_aes_encrypt(key->tfm, b0, b); | |
366 | xor_block(pos, b, len); | |
367 | /* Authentication */ | |
368 | xor_block(a, pos, len); | |
369 | ieee80211_ccmp_aes_encrypt(key->tfm, a, a); | |
370 | pos += len; | |
371 | } | |
372 | ||
373 | if (memcmp(mic, a, CCMP_MIC_LEN) != 0) { | |
374 | if (net_ratelimit()) { | |
375 | printk(KERN_DEBUG "CCMP: decrypt failed: STA=" | |
0795af57 | 376 | "%s\n", print_mac(mac, hdr->addr2)); |
b453872c JG |
377 | } |
378 | key->dot11RSNAStatsCCMPDecryptErrors++; | |
379 | return -5; | |
380 | } | |
381 | ||
382 | memcpy(key->rx_pn, pn, CCMP_PN_LEN); | |
383 | ||
384 | /* Remove hdr and MIC */ | |
385 | memmove(skb->data + CCMP_HDR_LEN, skb->data, hdr_len); | |
386 | skb_pull(skb, CCMP_HDR_LEN); | |
387 | skb_trim(skb, skb->len - CCMP_MIC_LEN); | |
388 | ||
389 | return keyidx; | |
390 | } | |
391 | ||
0edd5b44 | 392 | static int ieee80211_ccmp_set_key(void *key, int len, u8 * seq, void *priv) |
b453872c JG |
393 | { |
394 | struct ieee80211_ccmp_data *data = priv; | |
395 | int keyidx; | |
f12cc209 | 396 | struct crypto_cipher *tfm = data->tfm; |
b453872c JG |
397 | |
398 | keyidx = data->key_idx; | |
399 | memset(data, 0, sizeof(*data)); | |
400 | data->key_idx = keyidx; | |
401 | data->tfm = tfm; | |
402 | if (len == CCMP_TK_LEN) { | |
403 | memcpy(data->key, key, CCMP_TK_LEN); | |
404 | data->key_set = 1; | |
405 | if (seq) { | |
406 | data->rx_pn[0] = seq[5]; | |
407 | data->rx_pn[1] = seq[4]; | |
408 | data->rx_pn[2] = seq[3]; | |
409 | data->rx_pn[3] = seq[2]; | |
410 | data->rx_pn[4] = seq[1]; | |
411 | data->rx_pn[5] = seq[0]; | |
412 | } | |
413 | crypto_cipher_setkey(data->tfm, data->key, CCMP_TK_LEN); | |
414 | } else if (len == 0) | |
415 | data->key_set = 0; | |
416 | else | |
417 | return -1; | |
418 | ||
419 | return 0; | |
420 | } | |
421 | ||
0edd5b44 | 422 | static int ieee80211_ccmp_get_key(void *key, int len, u8 * seq, void *priv) |
b453872c JG |
423 | { |
424 | struct ieee80211_ccmp_data *data = priv; | |
425 | ||
426 | if (len < CCMP_TK_LEN) | |
427 | return -1; | |
428 | ||
429 | if (!data->key_set) | |
430 | return 0; | |
431 | memcpy(key, data->key, CCMP_TK_LEN); | |
432 | ||
433 | if (seq) { | |
434 | seq[0] = data->tx_pn[5]; | |
435 | seq[1] = data->tx_pn[4]; | |
436 | seq[2] = data->tx_pn[3]; | |
437 | seq[3] = data->tx_pn[2]; | |
438 | seq[4] = data->tx_pn[1]; | |
439 | seq[5] = data->tx_pn[0]; | |
440 | } | |
441 | ||
442 | return CCMP_TK_LEN; | |
443 | } | |
444 | ||
0edd5b44 | 445 | static char *ieee80211_ccmp_print_stats(char *p, void *priv) |
b453872c JG |
446 | { |
447 | struct ieee80211_ccmp_data *ccmp = priv; | |
0795af57 | 448 | |
b453872c JG |
449 | p += sprintf(p, "key[%d] alg=CCMP key_set=%d " |
450 | "tx_pn=%02x%02x%02x%02x%02x%02x " | |
451 | "rx_pn=%02x%02x%02x%02x%02x%02x " | |
452 | "format_errors=%d replays=%d decrypt_errors=%d\n", | |
453 | ccmp->key_idx, ccmp->key_set, | |
0795af57 JP |
454 | ccmp->tx_pn[0], ccmp->tx_pn[1], ccmp->tx_pn[2], |
455 | ccmp->tx_pn[3], ccmp->tx_pn[4], ccmp->tx_pn[5], | |
456 | ccmp->rx_pn[0], ccmp->rx_pn[1], ccmp->rx_pn[2], | |
457 | ccmp->rx_pn[3], ccmp->rx_pn[4], ccmp->rx_pn[5], | |
b453872c JG |
458 | ccmp->dot11RSNAStatsCCMPFormatErrors, |
459 | ccmp->dot11RSNAStatsCCMPReplays, | |
460 | ccmp->dot11RSNAStatsCCMPDecryptErrors); | |
461 | ||
462 | return p; | |
463 | } | |
464 | ||
b453872c | 465 | static struct ieee80211_crypto_ops ieee80211_crypt_ccmp = { |
74079fdc JK |
466 | .name = "CCMP", |
467 | .init = ieee80211_ccmp_init, | |
468 | .deinit = ieee80211_ccmp_deinit, | |
31b59eae | 469 | .build_iv = ieee80211_ccmp_hdr, |
74079fdc JK |
470 | .encrypt_mpdu = ieee80211_ccmp_encrypt, |
471 | .decrypt_mpdu = ieee80211_ccmp_decrypt, | |
472 | .encrypt_msdu = NULL, | |
473 | .decrypt_msdu = NULL, | |
474 | .set_key = ieee80211_ccmp_set_key, | |
475 | .get_key = ieee80211_ccmp_get_key, | |
476 | .print_stats = ieee80211_ccmp_print_stats, | |
1264fc04 JK |
477 | .extra_mpdu_prefix_len = CCMP_HDR_LEN, |
478 | .extra_mpdu_postfix_len = CCMP_MIC_LEN, | |
74079fdc | 479 | .owner = THIS_MODULE, |
b453872c JG |
480 | }; |
481 | ||
b453872c JG |
482 | static int __init ieee80211_crypto_ccmp_init(void) |
483 | { | |
484 | return ieee80211_register_crypto_ops(&ieee80211_crypt_ccmp); | |
485 | } | |
486 | ||
b453872c JG |
487 | static void __exit ieee80211_crypto_ccmp_exit(void) |
488 | { | |
489 | ieee80211_unregister_crypto_ops(&ieee80211_crypt_ccmp); | |
490 | } | |
491 | ||
b453872c JG |
492 | module_init(ieee80211_crypto_ccmp_init); |
493 | module_exit(ieee80211_crypto_ccmp_exit); |