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Commit | Line | Data |
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b453872c | 1 | /* |
274bfb8d | 2 | * lib80211 crypt: host-based CCMP encryption implementation for lib80211 |
b453872c | 3 | * |
85d32e7b | 4 | * Copyright (c) 2003-2004, Jouni Malinen <j@w1.fi> |
274bfb8d | 5 | * Copyright (c) 2008, John W. Linville <linville@tuxdriver.com> |
b453872c JG |
6 | * |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. See README and COPYING for | |
10 | * more details. | |
11 | */ | |
12 | ||
172589cc | 13 | #include <linux/kernel.h> |
f12cc209 | 14 | #include <linux/err.h> |
b453872c JG |
15 | #include <linux/module.h> |
16 | #include <linux/init.h> | |
17 | #include <linux/slab.h> | |
18 | #include <linux/random.h> | |
19 | #include <linux/skbuff.h> | |
20 | #include <linux/netdevice.h> | |
21 | #include <linux/if_ether.h> | |
22 | #include <linux/if_arp.h> | |
23 | #include <asm/string.h> | |
24 | #include <linux/wireless.h> | |
25 | ||
274bfb8d | 26 | #include <linux/ieee80211.h> |
b453872c | 27 | |
b453872c | 28 | #include <linux/crypto.h> |
b453872c | 29 | |
274bfb8d JL |
30 | #include <net/lib80211.h> |
31 | ||
b453872c JG |
32 | MODULE_AUTHOR("Jouni Malinen"); |
33 | MODULE_DESCRIPTION("Host AP crypt: CCMP"); | |
34 | MODULE_LICENSE("GPL"); | |
35 | ||
36 | #define AES_BLOCK_LEN 16 | |
37 | #define CCMP_HDR_LEN 8 | |
38 | #define CCMP_MIC_LEN 8 | |
39 | #define CCMP_TK_LEN 16 | |
40 | #define CCMP_PN_LEN 6 | |
41 | ||
274bfb8d | 42 | struct lib80211_ccmp_data { |
b453872c JG |
43 | u8 key[CCMP_TK_LEN]; |
44 | int key_set; | |
45 | ||
46 | u8 tx_pn[CCMP_PN_LEN]; | |
47 | u8 rx_pn[CCMP_PN_LEN]; | |
48 | ||
49 | u32 dot11RSNAStatsCCMPFormatErrors; | |
50 | u32 dot11RSNAStatsCCMPReplays; | |
51 | u32 dot11RSNAStatsCCMPDecryptErrors; | |
52 | ||
53 | int key_idx; | |
54 | ||
f12cc209 | 55 | struct crypto_cipher *tfm; |
b453872c JG |
56 | |
57 | /* scratch buffers for virt_to_page() (crypto API) */ | |
58 | u8 tx_b0[AES_BLOCK_LEN], tx_b[AES_BLOCK_LEN], | |
0edd5b44 | 59 | tx_e[AES_BLOCK_LEN], tx_s0[AES_BLOCK_LEN]; |
b453872c JG |
60 | u8 rx_b0[AES_BLOCK_LEN], rx_b[AES_BLOCK_LEN], rx_a[AES_BLOCK_LEN]; |
61 | }; | |
62 | ||
274bfb8d | 63 | static inline void lib80211_ccmp_aes_encrypt(struct crypto_cipher *tfm, |
f12cc209 | 64 | const u8 pt[16], u8 ct[16]) |
b453872c | 65 | { |
f12cc209 | 66 | crypto_cipher_encrypt_one(tfm, ct, pt); |
b453872c JG |
67 | } |
68 | ||
274bfb8d | 69 | static void *lib80211_ccmp_init(int key_idx) |
b453872c | 70 | { |
274bfb8d | 71 | struct lib80211_ccmp_data *priv; |
b453872c | 72 | |
0da974f4 | 73 | priv = kzalloc(sizeof(*priv), GFP_ATOMIC); |
b453872c JG |
74 | if (priv == NULL) |
75 | goto fail; | |
b453872c JG |
76 | priv->key_idx = key_idx; |
77 | ||
1ad0f160 | 78 | priv->tfm = crypto_alloc_cipher("aes", 0, 0); |
f12cc209 | 79 | if (IS_ERR(priv->tfm)) { |
f12cc209 | 80 | priv->tfm = NULL; |
b453872c JG |
81 | goto fail; |
82 | } | |
83 | ||
84 | return priv; | |
85 | ||
0edd5b44 | 86 | fail: |
b453872c JG |
87 | if (priv) { |
88 | if (priv->tfm) | |
f12cc209 | 89 | crypto_free_cipher(priv->tfm); |
b453872c JG |
90 | kfree(priv); |
91 | } | |
92 | ||
93 | return NULL; | |
94 | } | |
95 | ||
274bfb8d | 96 | static void lib80211_ccmp_deinit(void *priv) |
b453872c | 97 | { |
274bfb8d | 98 | struct lib80211_ccmp_data *_priv = priv; |
b453872c | 99 | if (_priv && _priv->tfm) |
f12cc209 | 100 | crypto_free_cipher(_priv->tfm); |
b453872c JG |
101 | kfree(priv); |
102 | } | |
103 | ||
0edd5b44 | 104 | static inline void xor_block(u8 * b, u8 * a, size_t len) |
b453872c JG |
105 | { |
106 | int i; | |
107 | for (i = 0; i < len; i++) | |
108 | b[i] ^= a[i]; | |
109 | } | |
110 | ||
f12cc209 | 111 | static void ccmp_init_blocks(struct crypto_cipher *tfm, |
274bfb8d | 112 | struct ieee80211_hdr *hdr, |
0edd5b44 | 113 | u8 * pn, size_t dlen, u8 * b0, u8 * auth, u8 * s0) |
b453872c JG |
114 | { |
115 | u8 *pos, qc = 0; | |
116 | size_t aad_len; | |
b453872c JG |
117 | int a4_included, qc_included; |
118 | u8 aad[2 * AES_BLOCK_LEN]; | |
119 | ||
274bfb8d JL |
120 | a4_included = ieee80211_has_a4(hdr->frame_control); |
121 | qc_included = ieee80211_is_data_qos(hdr->frame_control); | |
122 | ||
b453872c JG |
123 | aad_len = 22; |
124 | if (a4_included) | |
125 | aad_len += 6; | |
126 | if (qc_included) { | |
0edd5b44 | 127 | pos = (u8 *) & hdr->addr4; |
b453872c JG |
128 | if (a4_included) |
129 | pos += 6; | |
130 | qc = *pos & 0x0f; | |
131 | aad_len += 2; | |
132 | } | |
133 | ||
134 | /* CCM Initial Block: | |
135 | * Flag (Include authentication header, M=3 (8-octet MIC), | |
136 | * L=1 (2-octet Dlen)) | |
137 | * Nonce: 0x00 | A2 | PN | |
138 | * Dlen */ | |
139 | b0[0] = 0x59; | |
140 | b0[1] = qc; | |
141 | memcpy(b0 + 2, hdr->addr2, ETH_ALEN); | |
142 | memcpy(b0 + 8, pn, CCMP_PN_LEN); | |
143 | b0[14] = (dlen >> 8) & 0xff; | |
144 | b0[15] = dlen & 0xff; | |
145 | ||
146 | /* AAD: | |
147 | * FC with bits 4..6 and 11..13 masked to zero; 14 is always one | |
148 | * A1 | A2 | A3 | |
149 | * SC with bits 4..15 (seq#) masked to zero | |
150 | * A4 (if present) | |
151 | * QC (if present) | |
152 | */ | |
153 | pos = (u8 *) hdr; | |
0edd5b44 | 154 | aad[0] = 0; /* aad_len >> 8 */ |
b453872c JG |
155 | aad[1] = aad_len & 0xff; |
156 | aad[2] = pos[0] & 0x8f; | |
157 | aad[3] = pos[1] & 0xc7; | |
158 | memcpy(aad + 4, hdr->addr1, 3 * ETH_ALEN); | |
274bfb8d | 159 | pos = (u8 *) & hdr->seq_ctrl; |
b453872c | 160 | aad[22] = pos[0] & 0x0f; |
0edd5b44 | 161 | aad[23] = 0; /* all bits masked */ |
b453872c JG |
162 | memset(aad + 24, 0, 8); |
163 | if (a4_included) | |
164 | memcpy(aad + 24, hdr->addr4, ETH_ALEN); | |
165 | if (qc_included) { | |
166 | aad[a4_included ? 30 : 24] = qc; | |
167 | /* rest of QC masked */ | |
168 | } | |
169 | ||
170 | /* Start with the first block and AAD */ | |
274bfb8d | 171 | lib80211_ccmp_aes_encrypt(tfm, b0, auth); |
b453872c | 172 | xor_block(auth, aad, AES_BLOCK_LEN); |
274bfb8d | 173 | lib80211_ccmp_aes_encrypt(tfm, auth, auth); |
b453872c | 174 | xor_block(auth, &aad[AES_BLOCK_LEN], AES_BLOCK_LEN); |
274bfb8d | 175 | lib80211_ccmp_aes_encrypt(tfm, auth, auth); |
b453872c JG |
176 | b0[0] &= 0x07; |
177 | b0[14] = b0[15] = 0; | |
274bfb8d | 178 | lib80211_ccmp_aes_encrypt(tfm, b0, s0); |
b453872c JG |
179 | } |
180 | ||
274bfb8d | 181 | static int lib80211_ccmp_hdr(struct sk_buff *skb, int hdr_len, |
9184d934 | 182 | u8 *aeskey, int keylen, void *priv) |
b453872c | 183 | { |
274bfb8d | 184 | struct lib80211_ccmp_data *key = priv; |
31b59eae JK |
185 | int i; |
186 | u8 *pos; | |
b453872c | 187 | |
31b59eae | 188 | if (skb_headroom(skb) < CCMP_HDR_LEN || skb->len < hdr_len) |
b453872c JG |
189 | return -1; |
190 | ||
9184d934 ZY |
191 | if (aeskey != NULL && keylen >= CCMP_TK_LEN) |
192 | memcpy(aeskey, key->key, CCMP_TK_LEN); | |
193 | ||
b453872c JG |
194 | pos = skb_push(skb, CCMP_HDR_LEN); |
195 | memmove(pos, pos + CCMP_HDR_LEN, hdr_len); | |
196 | pos += hdr_len; | |
b453872c JG |
197 | |
198 | i = CCMP_PN_LEN - 1; | |
199 | while (i >= 0) { | |
200 | key->tx_pn[i]++; | |
201 | if (key->tx_pn[i] != 0) | |
202 | break; | |
203 | i--; | |
204 | } | |
205 | ||
206 | *pos++ = key->tx_pn[5]; | |
207 | *pos++ = key->tx_pn[4]; | |
208 | *pos++ = 0; | |
0edd5b44 | 209 | *pos++ = (key->key_idx << 6) | (1 << 5) /* Ext IV included */ ; |
b453872c JG |
210 | *pos++ = key->tx_pn[3]; |
211 | *pos++ = key->tx_pn[2]; | |
212 | *pos++ = key->tx_pn[1]; | |
213 | *pos++ = key->tx_pn[0]; | |
214 | ||
31b59eae JK |
215 | return CCMP_HDR_LEN; |
216 | } | |
217 | ||
274bfb8d | 218 | static int lib80211_ccmp_encrypt(struct sk_buff *skb, int hdr_len, void *priv) |
31b59eae | 219 | { |
274bfb8d | 220 | struct lib80211_ccmp_data *key = priv; |
31b59eae JK |
221 | int data_len, i, blocks, last, len; |
222 | u8 *pos, *mic; | |
274bfb8d | 223 | struct ieee80211_hdr *hdr; |
31b59eae JK |
224 | u8 *b0 = key->tx_b0; |
225 | u8 *b = key->tx_b; | |
226 | u8 *e = key->tx_e; | |
227 | u8 *s0 = key->tx_s0; | |
228 | ||
229 | if (skb_tailroom(skb) < CCMP_MIC_LEN || skb->len < hdr_len) | |
230 | return -1; | |
231 | ||
232 | data_len = skb->len - hdr_len; | |
274bfb8d | 233 | len = lib80211_ccmp_hdr(skb, hdr_len, NULL, 0, priv); |
31b59eae JK |
234 | if (len < 0) |
235 | return -1; | |
236 | ||
237 | pos = skb->data + hdr_len + CCMP_HDR_LEN; | |
274bfb8d | 238 | hdr = (struct ieee80211_hdr *)skb->data; |
b453872c JG |
239 | ccmp_init_blocks(key->tfm, hdr, key->tx_pn, data_len, b0, b, s0); |
240 | ||
172589cc | 241 | blocks = DIV_ROUND_UP(data_len, AES_BLOCK_LEN); |
b453872c JG |
242 | last = data_len % AES_BLOCK_LEN; |
243 | ||
244 | for (i = 1; i <= blocks; i++) { | |
245 | len = (i == blocks && last) ? last : AES_BLOCK_LEN; | |
246 | /* Authentication */ | |
247 | xor_block(b, pos, len); | |
274bfb8d | 248 | lib80211_ccmp_aes_encrypt(key->tfm, b, b); |
b453872c JG |
249 | /* Encryption, with counter */ |
250 | b0[14] = (i >> 8) & 0xff; | |
251 | b0[15] = i & 0xff; | |
274bfb8d | 252 | lib80211_ccmp_aes_encrypt(key->tfm, b0, e); |
b453872c JG |
253 | xor_block(pos, e, len); |
254 | pos += len; | |
255 | } | |
256 | ||
d0833a6a | 257 | mic = skb_put(skb, CCMP_MIC_LEN); |
b453872c JG |
258 | for (i = 0; i < CCMP_MIC_LEN; i++) |
259 | mic[i] = b[i] ^ s0[i]; | |
260 | ||
261 | return 0; | |
262 | } | |
263 | ||
b4328d87 ZY |
264 | /* |
265 | * deal with seq counter wrapping correctly. | |
266 | * refer to timer_after() for jiffies wrapping handling | |
267 | */ | |
268 | static inline int ccmp_replay_check(u8 *pn_n, u8 *pn_o) | |
269 | { | |
270 | u32 iv32_n, iv16_n; | |
271 | u32 iv32_o, iv16_o; | |
272 | ||
273 | iv32_n = (pn_n[0] << 24) | (pn_n[1] << 16) | (pn_n[2] << 8) | pn_n[3]; | |
274 | iv16_n = (pn_n[4] << 8) | pn_n[5]; | |
275 | ||
276 | iv32_o = (pn_o[0] << 24) | (pn_o[1] << 16) | (pn_o[2] << 8) | pn_o[3]; | |
277 | iv16_o = (pn_o[4] << 8) | pn_o[5]; | |
278 | ||
279 | if ((s32)iv32_n - (s32)iv32_o < 0 || | |
280 | (iv32_n == iv32_o && iv16_n <= iv16_o)) | |
281 | return 1; | |
282 | return 0; | |
283 | } | |
284 | ||
274bfb8d | 285 | static int lib80211_ccmp_decrypt(struct sk_buff *skb, int hdr_len, void *priv) |
b453872c | 286 | { |
274bfb8d | 287 | struct lib80211_ccmp_data *key = priv; |
b453872c | 288 | u8 keyidx, *pos; |
274bfb8d | 289 | struct ieee80211_hdr *hdr; |
b453872c JG |
290 | u8 *b0 = key->rx_b0; |
291 | u8 *b = key->rx_b; | |
292 | u8 *a = key->rx_a; | |
293 | u8 pn[6]; | |
294 | int i, blocks, last, len; | |
295 | size_t data_len = skb->len - hdr_len - CCMP_HDR_LEN - CCMP_MIC_LEN; | |
296 | u8 *mic = skb->data + skb->len - CCMP_MIC_LEN; | |
297 | ||
298 | if (skb->len < hdr_len + CCMP_HDR_LEN + CCMP_MIC_LEN) { | |
299 | key->dot11RSNAStatsCCMPFormatErrors++; | |
300 | return -1; | |
301 | } | |
302 | ||
274bfb8d | 303 | hdr = (struct ieee80211_hdr *)skb->data; |
b453872c JG |
304 | pos = skb->data + hdr_len; |
305 | keyidx = pos[3]; | |
306 | if (!(keyidx & (1 << 5))) { | |
e87cc472 JP |
307 | net_dbg_ratelimited("CCMP: received packet without ExtIV flag from %pM\n", |
308 | hdr->addr2); | |
b453872c JG |
309 | key->dot11RSNAStatsCCMPFormatErrors++; |
310 | return -2; | |
311 | } | |
312 | keyidx >>= 6; | |
313 | if (key->key_idx != keyidx) { | |
996bf99c JB |
314 | net_dbg_ratelimited("CCMP: RX tkey->key_idx=%d frame keyidx=%d\n", |
315 | key->key_idx, keyidx); | |
b453872c JG |
316 | return -6; |
317 | } | |
318 | if (!key->key_set) { | |
e87cc472 JP |
319 | net_dbg_ratelimited("CCMP: received packet from %pM with keyid=%d that does not have a configured key\n", |
320 | hdr->addr2, keyidx); | |
b453872c JG |
321 | return -3; |
322 | } | |
323 | ||
324 | pn[0] = pos[7]; | |
325 | pn[1] = pos[6]; | |
326 | pn[2] = pos[5]; | |
327 | pn[3] = pos[4]; | |
328 | pn[4] = pos[1]; | |
329 | pn[5] = pos[0]; | |
330 | pos += 8; | |
331 | ||
b4328d87 | 332 | if (ccmp_replay_check(pn, key->rx_pn)) { |
6f16bf3b | 333 | #ifdef CONFIG_LIB80211_DEBUG |
e87cc472 JP |
334 | net_dbg_ratelimited("CCMP: replay detected: STA=%pM previous PN %02x%02x%02x%02x%02x%02x received PN %02x%02x%02x%02x%02x%02x\n", |
335 | hdr->addr2, | |
336 | key->rx_pn[0], key->rx_pn[1], key->rx_pn[2], | |
337 | key->rx_pn[3], key->rx_pn[4], key->rx_pn[5], | |
338 | pn[0], pn[1], pn[2], pn[3], pn[4], pn[5]); | |
6f16bf3b | 339 | #endif |
b453872c JG |
340 | key->dot11RSNAStatsCCMPReplays++; |
341 | return -4; | |
342 | } | |
343 | ||
344 | ccmp_init_blocks(key->tfm, hdr, pn, data_len, b0, a, b); | |
345 | xor_block(mic, b, CCMP_MIC_LEN); | |
346 | ||
172589cc | 347 | blocks = DIV_ROUND_UP(data_len, AES_BLOCK_LEN); |
b453872c JG |
348 | last = data_len % AES_BLOCK_LEN; |
349 | ||
350 | for (i = 1; i <= blocks; i++) { | |
351 | len = (i == blocks && last) ? last : AES_BLOCK_LEN; | |
352 | /* Decrypt, with counter */ | |
353 | b0[14] = (i >> 8) & 0xff; | |
354 | b0[15] = i & 0xff; | |
274bfb8d | 355 | lib80211_ccmp_aes_encrypt(key->tfm, b0, b); |
b453872c JG |
356 | xor_block(pos, b, len); |
357 | /* Authentication */ | |
358 | xor_block(a, pos, len); | |
274bfb8d | 359 | lib80211_ccmp_aes_encrypt(key->tfm, a, a); |
b453872c JG |
360 | pos += len; |
361 | } | |
362 | ||
363 | if (memcmp(mic, a, CCMP_MIC_LEN) != 0) { | |
e87cc472 JP |
364 | net_dbg_ratelimited("CCMP: decrypt failed: STA=%pM\n", |
365 | hdr->addr2); | |
b453872c JG |
366 | key->dot11RSNAStatsCCMPDecryptErrors++; |
367 | return -5; | |
368 | } | |
369 | ||
370 | memcpy(key->rx_pn, pn, CCMP_PN_LEN); | |
371 | ||
372 | /* Remove hdr and MIC */ | |
373 | memmove(skb->data + CCMP_HDR_LEN, skb->data, hdr_len); | |
374 | skb_pull(skb, CCMP_HDR_LEN); | |
375 | skb_trim(skb, skb->len - CCMP_MIC_LEN); | |
376 | ||
377 | return keyidx; | |
378 | } | |
379 | ||
274bfb8d | 380 | static int lib80211_ccmp_set_key(void *key, int len, u8 * seq, void *priv) |
b453872c | 381 | { |
274bfb8d | 382 | struct lib80211_ccmp_data *data = priv; |
b453872c | 383 | int keyidx; |
f12cc209 | 384 | struct crypto_cipher *tfm = data->tfm; |
b453872c JG |
385 | |
386 | keyidx = data->key_idx; | |
387 | memset(data, 0, sizeof(*data)); | |
388 | data->key_idx = keyidx; | |
389 | data->tfm = tfm; | |
390 | if (len == CCMP_TK_LEN) { | |
391 | memcpy(data->key, key, CCMP_TK_LEN); | |
392 | data->key_set = 1; | |
393 | if (seq) { | |
394 | data->rx_pn[0] = seq[5]; | |
395 | data->rx_pn[1] = seq[4]; | |
396 | data->rx_pn[2] = seq[3]; | |
397 | data->rx_pn[3] = seq[2]; | |
398 | data->rx_pn[4] = seq[1]; | |
399 | data->rx_pn[5] = seq[0]; | |
400 | } | |
401 | crypto_cipher_setkey(data->tfm, data->key, CCMP_TK_LEN); | |
402 | } else if (len == 0) | |
403 | data->key_set = 0; | |
404 | else | |
405 | return -1; | |
406 | ||
407 | return 0; | |
408 | } | |
409 | ||
274bfb8d | 410 | static int lib80211_ccmp_get_key(void *key, int len, u8 * seq, void *priv) |
b453872c | 411 | { |
274bfb8d | 412 | struct lib80211_ccmp_data *data = priv; |
b453872c JG |
413 | |
414 | if (len < CCMP_TK_LEN) | |
415 | return -1; | |
416 | ||
417 | if (!data->key_set) | |
418 | return 0; | |
419 | memcpy(key, data->key, CCMP_TK_LEN); | |
420 | ||
421 | if (seq) { | |
422 | seq[0] = data->tx_pn[5]; | |
423 | seq[1] = data->tx_pn[4]; | |
424 | seq[2] = data->tx_pn[3]; | |
425 | seq[3] = data->tx_pn[2]; | |
426 | seq[4] = data->tx_pn[1]; | |
427 | seq[5] = data->tx_pn[0]; | |
428 | } | |
429 | ||
430 | return CCMP_TK_LEN; | |
431 | } | |
432 | ||
6bbefe86 | 433 | static void lib80211_ccmp_print_stats(struct seq_file *m, void *priv) |
b453872c | 434 | { |
274bfb8d | 435 | struct lib80211_ccmp_data *ccmp = priv; |
0795af57 | 436 | |
6bbefe86 DH |
437 | seq_printf(m, |
438 | "key[%d] alg=CCMP key_set=%d " | |
439 | "tx_pn=%02x%02x%02x%02x%02x%02x " | |
440 | "rx_pn=%02x%02x%02x%02x%02x%02x " | |
441 | "format_errors=%d replays=%d decrypt_errors=%d\n", | |
442 | ccmp->key_idx, ccmp->key_set, | |
443 | ccmp->tx_pn[0], ccmp->tx_pn[1], ccmp->tx_pn[2], | |
444 | ccmp->tx_pn[3], ccmp->tx_pn[4], ccmp->tx_pn[5], | |
445 | ccmp->rx_pn[0], ccmp->rx_pn[1], ccmp->rx_pn[2], | |
446 | ccmp->rx_pn[3], ccmp->rx_pn[4], ccmp->rx_pn[5], | |
447 | ccmp->dot11RSNAStatsCCMPFormatErrors, | |
448 | ccmp->dot11RSNAStatsCCMPReplays, | |
449 | ccmp->dot11RSNAStatsCCMPDecryptErrors); | |
b453872c JG |
450 | } |
451 | ||
274bfb8d | 452 | static struct lib80211_crypto_ops lib80211_crypt_ccmp = { |
74079fdc | 453 | .name = "CCMP", |
274bfb8d JL |
454 | .init = lib80211_ccmp_init, |
455 | .deinit = lib80211_ccmp_deinit, | |
274bfb8d JL |
456 | .encrypt_mpdu = lib80211_ccmp_encrypt, |
457 | .decrypt_mpdu = lib80211_ccmp_decrypt, | |
74079fdc JK |
458 | .encrypt_msdu = NULL, |
459 | .decrypt_msdu = NULL, | |
274bfb8d JL |
460 | .set_key = lib80211_ccmp_set_key, |
461 | .get_key = lib80211_ccmp_get_key, | |
462 | .print_stats = lib80211_ccmp_print_stats, | |
1264fc04 JK |
463 | .extra_mpdu_prefix_len = CCMP_HDR_LEN, |
464 | .extra_mpdu_postfix_len = CCMP_MIC_LEN, | |
74079fdc | 465 | .owner = THIS_MODULE, |
b453872c JG |
466 | }; |
467 | ||
274bfb8d | 468 | static int __init lib80211_crypto_ccmp_init(void) |
b453872c | 469 | { |
274bfb8d | 470 | return lib80211_register_crypto_ops(&lib80211_crypt_ccmp); |
b453872c JG |
471 | } |
472 | ||
274bfb8d | 473 | static void __exit lib80211_crypto_ccmp_exit(void) |
b453872c | 474 | { |
274bfb8d | 475 | lib80211_unregister_crypto_ops(&lib80211_crypt_ccmp); |
b453872c JG |
476 | } |
477 | ||
274bfb8d JL |
478 | module_init(lib80211_crypto_ccmp_init); |
479 | module_exit(lib80211_crypto_ccmp_exit); |