1 // SPDX-License-Identifier: GPL-2.0-only 1 // SPDX-License-Identifier: GPL-2.0-only
2 /* 2 /*
3 * Copyright 2002-2004, Instant802 Networks, I 3 * Copyright 2002-2004, Instant802 Networks, Inc.
4 * Copyright 2008, Jouni Malinen <j@w1.fi> 4 * Copyright 2008, Jouni Malinen <j@w1.fi>
5 * Copyright (C) 2016-2017 Intel Deutschland G 5 * Copyright (C) 2016-2017 Intel Deutschland GmbH
6 * Copyright (C) 2020-2023 Intel Corporation !! 6 * Copyright (C) 2020-2021 Intel Corporation
7 */ 7 */
8 8
9 #include <linux/netdevice.h> 9 #include <linux/netdevice.h>
10 #include <linux/types.h> 10 #include <linux/types.h>
11 #include <linux/skbuff.h> 11 #include <linux/skbuff.h>
12 #include <linux/compiler.h> 12 #include <linux/compiler.h>
13 #include <linux/ieee80211.h> 13 #include <linux/ieee80211.h>
14 #include <linux/gfp.h> 14 #include <linux/gfp.h>
15 #include <linux/unaligned.h> !! 15 #include <asm/unaligned.h>
16 #include <net/mac80211.h> 16 #include <net/mac80211.h>
17 #include <crypto/aes.h> 17 #include <crypto/aes.h>
18 #include <crypto/utils.h> !! 18 #include <crypto/algapi.h>
19 19
20 #include "ieee80211_i.h" 20 #include "ieee80211_i.h"
21 #include "michael.h" 21 #include "michael.h"
22 #include "tkip.h" 22 #include "tkip.h"
23 #include "aes_ccm.h" 23 #include "aes_ccm.h"
24 #include "aes_cmac.h" 24 #include "aes_cmac.h"
25 #include "aes_gmac.h" 25 #include "aes_gmac.h"
26 #include "aes_gcm.h" 26 #include "aes_gcm.h"
27 #include "wpa.h" 27 #include "wpa.h"
28 28
29 ieee80211_tx_result 29 ieee80211_tx_result
30 ieee80211_tx_h_michael_mic_add(struct ieee8021 30 ieee80211_tx_h_michael_mic_add(struct ieee80211_tx_data *tx)
31 { 31 {
32 u8 *data, *key, *mic; 32 u8 *data, *key, *mic;
33 size_t data_len; 33 size_t data_len;
34 unsigned int hdrlen; 34 unsigned int hdrlen;
35 struct ieee80211_hdr *hdr; 35 struct ieee80211_hdr *hdr;
36 struct sk_buff *skb = tx->skb; 36 struct sk_buff *skb = tx->skb;
37 struct ieee80211_tx_info *info = IEEE8 37 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
38 int tail; 38 int tail;
39 39
40 hdr = (struct ieee80211_hdr *)skb->dat 40 hdr = (struct ieee80211_hdr *)skb->data;
41 if (!tx->key || tx->key->conf.cipher ! 41 if (!tx->key || tx->key->conf.cipher != WLAN_CIPHER_SUITE_TKIP ||
42 skb->len < 24 || !ieee80211_is_dat 42 skb->len < 24 || !ieee80211_is_data_present(hdr->frame_control))
43 return TX_CONTINUE; 43 return TX_CONTINUE;
44 44
45 hdrlen = ieee80211_hdrlen(hdr->frame_c 45 hdrlen = ieee80211_hdrlen(hdr->frame_control);
46 if (skb->len < hdrlen) 46 if (skb->len < hdrlen)
47 return TX_DROP; 47 return TX_DROP;
48 48
49 data = skb->data + hdrlen; 49 data = skb->data + hdrlen;
50 data_len = skb->len - hdrlen; 50 data_len = skb->len - hdrlen;
51 51
52 if (unlikely(info->flags & IEEE80211_T 52 if (unlikely(info->flags & IEEE80211_TX_INTFL_TKIP_MIC_FAILURE)) {
53 /* Need to use software crypto 53 /* Need to use software crypto for the test */
54 info->control.hw_key = NULL; 54 info->control.hw_key = NULL;
55 } 55 }
56 56
57 if (info->control.hw_key && 57 if (info->control.hw_key &&
58 (info->flags & IEEE80211_TX_CTL_DO 58 (info->flags & IEEE80211_TX_CTL_DONTFRAG ||
59 ieee80211_hw_check(&tx->local->hw 59 ieee80211_hw_check(&tx->local->hw, SUPPORTS_TX_FRAG)) &&
60 !(tx->key->conf.flags & (IEEE80211 60 !(tx->key->conf.flags & (IEEE80211_KEY_FLAG_GENERATE_MMIC |
61 IEEE80211 61 IEEE80211_KEY_FLAG_PUT_MIC_SPACE))) {
62 /* hwaccel - with no need for 62 /* hwaccel - with no need for SW-generated MMIC or MIC space */
63 return TX_CONTINUE; 63 return TX_CONTINUE;
64 } 64 }
65 65
66 tail = MICHAEL_MIC_LEN; 66 tail = MICHAEL_MIC_LEN;
67 if (!info->control.hw_key) 67 if (!info->control.hw_key)
68 tail += IEEE80211_TKIP_ICV_LEN 68 tail += IEEE80211_TKIP_ICV_LEN;
69 69
70 if (WARN(skb_tailroom(skb) < tail || 70 if (WARN(skb_tailroom(skb) < tail ||
71 skb_headroom(skb) < IEEE80211 71 skb_headroom(skb) < IEEE80211_TKIP_IV_LEN,
72 "mmic: not enough head/tail ( 72 "mmic: not enough head/tail (%d/%d,%d/%d)\n",
73 skb_headroom(skb), IEEE80211_ 73 skb_headroom(skb), IEEE80211_TKIP_IV_LEN,
74 skb_tailroom(skb), tail)) 74 skb_tailroom(skb), tail))
75 return TX_DROP; 75 return TX_DROP;
76 76
77 mic = skb_put(skb, MICHAEL_MIC_LEN); 77 mic = skb_put(skb, MICHAEL_MIC_LEN);
78 78
79 if (tx->key->conf.flags & IEEE80211_KE 79 if (tx->key->conf.flags & IEEE80211_KEY_FLAG_PUT_MIC_SPACE) {
80 /* Zeroed MIC can help with de 80 /* Zeroed MIC can help with debug */
81 memset(mic, 0, MICHAEL_MIC_LEN 81 memset(mic, 0, MICHAEL_MIC_LEN);
82 return TX_CONTINUE; 82 return TX_CONTINUE;
83 } 83 }
84 84
85 key = &tx->key->conf.key[NL80211_TKIP_ 85 key = &tx->key->conf.key[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY];
86 michael_mic(key, hdr, data, data_len, 86 michael_mic(key, hdr, data, data_len, mic);
87 if (unlikely(info->flags & IEEE80211_T 87 if (unlikely(info->flags & IEEE80211_TX_INTFL_TKIP_MIC_FAILURE))
88 mic[0]++; 88 mic[0]++;
89 89
90 return TX_CONTINUE; 90 return TX_CONTINUE;
91 } 91 }
92 92
93 93
94 ieee80211_rx_result 94 ieee80211_rx_result
95 ieee80211_rx_h_michael_mic_verify(struct ieee8 95 ieee80211_rx_h_michael_mic_verify(struct ieee80211_rx_data *rx)
96 { 96 {
97 u8 *data, *key = NULL; 97 u8 *data, *key = NULL;
98 size_t data_len; 98 size_t data_len;
99 unsigned int hdrlen; 99 unsigned int hdrlen;
100 u8 mic[MICHAEL_MIC_LEN]; 100 u8 mic[MICHAEL_MIC_LEN];
101 struct sk_buff *skb = rx->skb; 101 struct sk_buff *skb = rx->skb;
102 struct ieee80211_rx_status *status = I 102 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
103 struct ieee80211_hdr *hdr = (struct ie 103 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
104 104
105 /* 105 /*
106 * it makes no sense to check for MIC 106 * it makes no sense to check for MIC errors on anything other
107 * than data frames. 107 * than data frames.
108 */ 108 */
109 if (!ieee80211_is_data_present(hdr->fr 109 if (!ieee80211_is_data_present(hdr->frame_control))
110 return RX_CONTINUE; 110 return RX_CONTINUE;
111 111
112 /* 112 /*
113 * No way to verify the MIC if the har 113 * No way to verify the MIC if the hardware stripped it or
114 * the IV with the key index. In this 114 * the IV with the key index. In this case we have solely rely
115 * on the driver to set RX_FLAG_MMIC_E 115 * on the driver to set RX_FLAG_MMIC_ERROR in the event of a
116 * MIC failure report. 116 * MIC failure report.
117 */ 117 */
118 if (status->flag & (RX_FLAG_MMIC_STRIP 118 if (status->flag & (RX_FLAG_MMIC_STRIPPED | RX_FLAG_IV_STRIPPED)) {
119 if (status->flag & RX_FLAG_MMI 119 if (status->flag & RX_FLAG_MMIC_ERROR)
120 goto mic_fail_no_key; 120 goto mic_fail_no_key;
121 121
122 if (!(status->flag & RX_FLAG_I 122 if (!(status->flag & RX_FLAG_IV_STRIPPED) && rx->key &&
123 rx->key->conf.cipher == WL 123 rx->key->conf.cipher == WLAN_CIPHER_SUITE_TKIP)
124 goto update_iv; 124 goto update_iv;
125 125
126 return RX_CONTINUE; 126 return RX_CONTINUE;
127 } 127 }
128 128
129 /* 129 /*
130 * Some hardware seems to generate Mic 130 * Some hardware seems to generate Michael MIC failure reports; even
131 * though, the frame was not encrypted 131 * though, the frame was not encrypted with TKIP and therefore has no
132 * MIC. Ignore the flag them to avoid 132 * MIC. Ignore the flag them to avoid triggering countermeasures.
133 */ 133 */
134 if (!rx->key || rx->key->conf.cipher ! 134 if (!rx->key || rx->key->conf.cipher != WLAN_CIPHER_SUITE_TKIP ||
135 !(status->flag & RX_FLAG_DECRYPTED 135 !(status->flag & RX_FLAG_DECRYPTED))
136 return RX_CONTINUE; 136 return RX_CONTINUE;
137 137
138 if (rx->sdata->vif.type == NL80211_IFT 138 if (rx->sdata->vif.type == NL80211_IFTYPE_AP && rx->key->conf.keyidx) {
139 /* 139 /*
140 * APs with pairwise keys shou 140 * APs with pairwise keys should never receive Michael MIC
141 * errors for non-zero keyidx 141 * errors for non-zero keyidx because these are reserved for
142 * group keys and only the AP 142 * group keys and only the AP is sending real multicast
143 * frames in the BSS. 143 * frames in the BSS.
144 */ 144 */
145 return RX_DROP_U_AP_RX_GROUPCA !! 145 return RX_DROP_UNUSABLE;
146 } 146 }
147 147
148 if (status->flag & RX_FLAG_MMIC_ERROR) 148 if (status->flag & RX_FLAG_MMIC_ERROR)
149 goto mic_fail; 149 goto mic_fail;
150 150
151 hdrlen = ieee80211_hdrlen(hdr->frame_c 151 hdrlen = ieee80211_hdrlen(hdr->frame_control);
152 if (skb->len < hdrlen + MICHAEL_MIC_LE 152 if (skb->len < hdrlen + MICHAEL_MIC_LEN)
153 return RX_DROP_U_SHORT_MMIC; !! 153 return RX_DROP_UNUSABLE;
154 154
155 if (skb_linearize(rx->skb)) 155 if (skb_linearize(rx->skb))
156 return RX_DROP_U_OOM; !! 156 return RX_DROP_UNUSABLE;
157 hdr = (void *)skb->data; 157 hdr = (void *)skb->data;
158 158
159 data = skb->data + hdrlen; 159 data = skb->data + hdrlen;
160 data_len = skb->len - hdrlen - MICHAEL 160 data_len = skb->len - hdrlen - MICHAEL_MIC_LEN;
161 key = &rx->key->conf.key[NL80211_TKIP_ 161 key = &rx->key->conf.key[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY];
162 michael_mic(key, hdr, data, data_len, 162 michael_mic(key, hdr, data, data_len, mic);
163 if (crypto_memneq(mic, data + data_len 163 if (crypto_memneq(mic, data + data_len, MICHAEL_MIC_LEN))
164 goto mic_fail; 164 goto mic_fail;
165 165
166 /* remove Michael MIC from payload */ 166 /* remove Michael MIC from payload */
167 skb_trim(skb, skb->len - MICHAEL_MIC_L 167 skb_trim(skb, skb->len - MICHAEL_MIC_LEN);
168 168
169 update_iv: 169 update_iv:
170 /* update IV in key information to be 170 /* update IV in key information to be able to detect replays */
171 rx->key->u.tkip.rx[rx->security_idx].i 171 rx->key->u.tkip.rx[rx->security_idx].iv32 = rx->tkip.iv32;
172 rx->key->u.tkip.rx[rx->security_idx].i 172 rx->key->u.tkip.rx[rx->security_idx].iv16 = rx->tkip.iv16;
173 173
174 return RX_CONTINUE; 174 return RX_CONTINUE;
175 175
176 mic_fail: 176 mic_fail:
177 rx->key->u.tkip.mic_failures++; 177 rx->key->u.tkip.mic_failures++;
178 178
179 mic_fail_no_key: 179 mic_fail_no_key:
180 /* 180 /*
181 * In some cases the key can be unset 181 * In some cases the key can be unset - e.g. a multicast packet, in
182 * a driver that supports HW encryptio 182 * a driver that supports HW encryption. Send up the key idx only if
183 * the key is set. 183 * the key is set.
184 */ 184 */
185 cfg80211_michael_mic_failure(rx->sdata 185 cfg80211_michael_mic_failure(rx->sdata->dev, hdr->addr2,
186 is_multic 186 is_multicast_ether_addr(hdr->addr1) ?
187 NL80211_K 187 NL80211_KEYTYPE_GROUP :
188 NL80211_K 188 NL80211_KEYTYPE_PAIRWISE,
189 rx->key ? 189 rx->key ? rx->key->conf.keyidx : -1,
190 NULL, GFP 190 NULL, GFP_ATOMIC);
191 return RX_DROP_U_MMIC_FAIL; !! 191 return RX_DROP_UNUSABLE;
192 } 192 }
193 193
194 static int tkip_encrypt_skb(struct ieee80211_t 194 static int tkip_encrypt_skb(struct ieee80211_tx_data *tx, struct sk_buff *skb)
195 { 195 {
196 struct ieee80211_hdr *hdr = (struct ie 196 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
197 struct ieee80211_key *key = tx->key; 197 struct ieee80211_key *key = tx->key;
198 struct ieee80211_tx_info *info = IEEE8 198 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
199 unsigned int hdrlen; 199 unsigned int hdrlen;
200 int len, tail; 200 int len, tail;
201 u64 pn; 201 u64 pn;
202 u8 *pos; 202 u8 *pos;
203 203
204 if (info->control.hw_key && 204 if (info->control.hw_key &&
205 !(info->control.hw_key->flags & IE 205 !(info->control.hw_key->flags & IEEE80211_KEY_FLAG_GENERATE_IV) &&
206 !(info->control.hw_key->flags & IE 206 !(info->control.hw_key->flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE)) {
207 /* hwaccel - with no need for 207 /* hwaccel - with no need for software-generated IV */
208 return 0; 208 return 0;
209 } 209 }
210 210
211 hdrlen = ieee80211_hdrlen(hdr->frame_c 211 hdrlen = ieee80211_hdrlen(hdr->frame_control);
212 len = skb->len - hdrlen; 212 len = skb->len - hdrlen;
213 213
214 if (info->control.hw_key) 214 if (info->control.hw_key)
215 tail = 0; 215 tail = 0;
216 else 216 else
217 tail = IEEE80211_TKIP_ICV_LEN; 217 tail = IEEE80211_TKIP_ICV_LEN;
218 218
219 if (WARN_ON(skb_tailroom(skb) < tail | 219 if (WARN_ON(skb_tailroom(skb) < tail ||
220 skb_headroom(skb) < IEEE80 220 skb_headroom(skb) < IEEE80211_TKIP_IV_LEN))
221 return -1; 221 return -1;
222 222
223 pos = skb_push(skb, IEEE80211_TKIP_IV_ 223 pos = skb_push(skb, IEEE80211_TKIP_IV_LEN);
224 memmove(pos, pos + IEEE80211_TKIP_IV_L 224 memmove(pos, pos + IEEE80211_TKIP_IV_LEN, hdrlen);
225 pos += hdrlen; 225 pos += hdrlen;
226 226
227 /* the HW only needs room for the IV, 227 /* the HW only needs room for the IV, but not the actual IV */
228 if (info->control.hw_key && 228 if (info->control.hw_key &&
229 (info->control.hw_key->flags & IEE 229 (info->control.hw_key->flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE))
230 return 0; 230 return 0;
231 231
232 /* Increase IV for the frame */ 232 /* Increase IV for the frame */
233 pn = atomic64_inc_return(&key->conf.tx 233 pn = atomic64_inc_return(&key->conf.tx_pn);
234 pos = ieee80211_tkip_add_iv(pos, &key- 234 pos = ieee80211_tkip_add_iv(pos, &key->conf, pn);
235 235
236 /* hwaccel - with software IV */ 236 /* hwaccel - with software IV */
237 if (info->control.hw_key) 237 if (info->control.hw_key)
238 return 0; 238 return 0;
239 239
240 /* Add room for ICV */ 240 /* Add room for ICV */
241 skb_put(skb, IEEE80211_TKIP_ICV_LEN); 241 skb_put(skb, IEEE80211_TKIP_ICV_LEN);
242 242
243 return ieee80211_tkip_encrypt_data(&tx 243 return ieee80211_tkip_encrypt_data(&tx->local->wep_tx_ctx,
244 key 244 key, skb, pos, len);
245 } 245 }
246 246
247 247
248 ieee80211_tx_result 248 ieee80211_tx_result
249 ieee80211_crypto_tkip_encrypt(struct ieee80211 249 ieee80211_crypto_tkip_encrypt(struct ieee80211_tx_data *tx)
250 { 250 {
251 struct sk_buff *skb; 251 struct sk_buff *skb;
252 252
253 ieee80211_tx_set_protected(tx); 253 ieee80211_tx_set_protected(tx);
254 254
255 skb_queue_walk(&tx->skbs, skb) { 255 skb_queue_walk(&tx->skbs, skb) {
256 if (tkip_encrypt_skb(tx, skb) 256 if (tkip_encrypt_skb(tx, skb) < 0)
257 return TX_DROP; 257 return TX_DROP;
258 } 258 }
259 259
260 return TX_CONTINUE; 260 return TX_CONTINUE;
261 } 261 }
262 262
263 263
264 ieee80211_rx_result 264 ieee80211_rx_result
265 ieee80211_crypto_tkip_decrypt(struct ieee80211 265 ieee80211_crypto_tkip_decrypt(struct ieee80211_rx_data *rx)
266 { 266 {
267 struct ieee80211_hdr *hdr = (struct ie 267 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) rx->skb->data;
268 int hdrlen, res, hwaccel = 0; 268 int hdrlen, res, hwaccel = 0;
269 struct ieee80211_key *key = rx->key; 269 struct ieee80211_key *key = rx->key;
270 struct sk_buff *skb = rx->skb; 270 struct sk_buff *skb = rx->skb;
271 struct ieee80211_rx_status *status = I 271 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
272 272
273 hdrlen = ieee80211_hdrlen(hdr->frame_c 273 hdrlen = ieee80211_hdrlen(hdr->frame_control);
274 274
275 if (!ieee80211_is_data(hdr->frame_cont 275 if (!ieee80211_is_data(hdr->frame_control))
276 return RX_CONTINUE; 276 return RX_CONTINUE;
277 277
278 if (!rx->sta || skb->len - hdrlen < 12 278 if (!rx->sta || skb->len - hdrlen < 12)
279 return RX_DROP_U_SHORT_TKIP; !! 279 return RX_DROP_UNUSABLE;
280 280
281 /* it may be possible to optimize this 281 /* it may be possible to optimize this a bit more */
282 if (skb_linearize(rx->skb)) 282 if (skb_linearize(rx->skb))
283 return RX_DROP_U_OOM; !! 283 return RX_DROP_UNUSABLE;
284 hdr = (void *)skb->data; 284 hdr = (void *)skb->data;
285 285
286 /* 286 /*
287 * Let TKIP code verify IV, but skip d 287 * Let TKIP code verify IV, but skip decryption.
288 * In the case where hardware checks t 288 * In the case where hardware checks the IV as well,
289 * we don't even get here, see ieee802 289 * we don't even get here, see ieee80211_rx_h_decrypt()
290 */ 290 */
291 if (status->flag & RX_FLAG_DECRYPTED) 291 if (status->flag & RX_FLAG_DECRYPTED)
292 hwaccel = 1; 292 hwaccel = 1;
293 293
294 res = ieee80211_tkip_decrypt_data(&rx- 294 res = ieee80211_tkip_decrypt_data(&rx->local->wep_rx_ctx,
295 key, 295 key, skb->data + hdrlen,
296 skb- 296 skb->len - hdrlen, rx->sta->sta.addr,
297 hdr- 297 hdr->addr1, hwaccel, rx->security_idx,
298 &rx- 298 &rx->tkip.iv32,
299 &rx- 299 &rx->tkip.iv16);
300 if (res != TKIP_DECRYPT_OK) 300 if (res != TKIP_DECRYPT_OK)
301 return RX_DROP_U_TKIP_FAIL; !! 301 return RX_DROP_UNUSABLE;
302 302
303 /* Trim ICV */ 303 /* Trim ICV */
304 if (!(status->flag & RX_FLAG_ICV_STRIP 304 if (!(status->flag & RX_FLAG_ICV_STRIPPED))
305 skb_trim(skb, skb->len - IEEE8 305 skb_trim(skb, skb->len - IEEE80211_TKIP_ICV_LEN);
306 306
307 /* Remove IV */ 307 /* Remove IV */
308 memmove(skb->data + IEEE80211_TKIP_IV_ 308 memmove(skb->data + IEEE80211_TKIP_IV_LEN, skb->data, hdrlen);
309 skb_pull(skb, IEEE80211_TKIP_IV_LEN); 309 skb_pull(skb, IEEE80211_TKIP_IV_LEN);
310 310
311 return RX_CONTINUE; 311 return RX_CONTINUE;
312 } 312 }
313 313
314 /* !! 314
315 * Calculate AAD for CCMP/GCMP, returning qos_ !! 315 static void ccmp_special_blocks(struct sk_buff *skb, u8 *pn, u8 *b_0, u8 *aad)
316 * need that in CCMP also for b_0. <<
317 */ <<
318 static u8 ccmp_gcmp_aad(struct sk_buff *skb, u <<
319 { 316 {
320 struct ieee80211_hdr *hdr = (void *)sk <<
321 __le16 mask_fc; 317 __le16 mask_fc;
322 int a4_included, mgmt; 318 int a4_included, mgmt;
323 u8 qos_tid; 319 u8 qos_tid;
324 u16 len_a = 22; !! 320 u16 len_a;
>> 321 unsigned int hdrlen;
>> 322 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
325 323
326 /* 324 /*
327 * Mask FC: zero subtype b4 b5 b6 (if 325 * Mask FC: zero subtype b4 b5 b6 (if not mgmt)
328 * Retry, PwrMgt, MoreData, Order (if !! 326 * Retry, PwrMgt, MoreData; set Protected
329 */ 327 */
330 mgmt = ieee80211_is_mgmt(hdr->frame_co 328 mgmt = ieee80211_is_mgmt(hdr->frame_control);
331 mask_fc = hdr->frame_control; 329 mask_fc = hdr->frame_control;
332 mask_fc &= ~cpu_to_le16(IEEE80211_FCTL 330 mask_fc &= ~cpu_to_le16(IEEE80211_FCTL_RETRY |
333 IEEE80211_FCTL 331 IEEE80211_FCTL_PM | IEEE80211_FCTL_MOREDATA);
334 if (!mgmt) 332 if (!mgmt)
335 mask_fc &= ~cpu_to_le16(0x0070 333 mask_fc &= ~cpu_to_le16(0x0070);
336 mask_fc |= cpu_to_le16(IEEE80211_FCTL_ 334 mask_fc |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
337 335
>> 336 hdrlen = ieee80211_hdrlen(hdr->frame_control);
>> 337 len_a = hdrlen - 2;
338 a4_included = ieee80211_has_a4(hdr->fr 338 a4_included = ieee80211_has_a4(hdr->frame_control);
339 if (a4_included) <<
340 len_a += 6; <<
341 339
342 if (ieee80211_is_data_qos(hdr->frame_c !! 340 if (ieee80211_is_data_qos(hdr->frame_control))
343 qos_tid = *ieee80211_get_qos_c !! 341 qos_tid = ieee80211_get_tid(hdr);
>> 342 else
>> 343 qos_tid = 0;
344 344
345 if (spp_amsdu) !! 345 /* In CCM, the initial vectors (IV) used for CTR mode encryption and CBC
346 qos_tid &= IEEE80211_Q !! 346 * mode authentication are not allowed to collide, yet both are derived
347 IEEE80211_Q !! 347 * from this vector b_0. We only set L := 1 here to indicate that the
348 else !! 348 * data size can be represented in (L+1) bytes. The CCM layer will take
349 qos_tid &= IEEE80211_Q !! 349 * care of storing the data length in the top (L+1) bytes and setting
>> 350 * and clearing the other bits as is required to derive the two IVs.
>> 351 */
>> 352 b_0[0] = 0x1;
350 353
351 mask_fc &= ~cpu_to_le16(IEEE80 !! 354 /* Nonce: Nonce Flags | A2 | PN
352 len_a += 2; !! 355 * Nonce Flags: Priority (b0..b3) | Management (b4) | Reserved (b5..b7)
353 } else { !! 356 */
354 qos_tid = 0; !! 357 b_0[1] = qos_tid | (mgmt << 4);
355 } !! 358 memcpy(&b_0[2], hdr->addr2, ETH_ALEN);
>> 359 memcpy(&b_0[8], pn, IEEE80211_CCMP_PN_LEN);
356 360
357 /* AAD (extra authenticate-only data) 361 /* AAD (extra authenticate-only data) / masked 802.11 header
358 * FC | A1 | A2 | A3 | SC | [A4] | [QC 362 * FC | A1 | A2 | A3 | SC | [A4] | [QC] */
359 put_unaligned_be16(len_a, &aad[0]); 363 put_unaligned_be16(len_a, &aad[0]);
360 put_unaligned(mask_fc, (__le16 *)&aad[ 364 put_unaligned(mask_fc, (__le16 *)&aad[2]);
361 memcpy(&aad[4], &hdr->addrs, 3 * ETH_A !! 365 memcpy(&aad[4], &hdr->addr1, 3 * ETH_ALEN);
362 366
363 /* Mask Seq#, leave Frag# */ 367 /* Mask Seq#, leave Frag# */
364 aad[22] = *((u8 *) &hdr->seq_ctrl) & 0 368 aad[22] = *((u8 *) &hdr->seq_ctrl) & 0x0f;
365 aad[23] = 0; 369 aad[23] = 0;
366 370
367 if (a4_included) { 371 if (a4_included) {
368 memcpy(&aad[24], hdr->addr4, E 372 memcpy(&aad[24], hdr->addr4, ETH_ALEN);
369 aad[30] = qos_tid; 373 aad[30] = qos_tid;
370 aad[31] = 0; 374 aad[31] = 0;
371 } else { 375 } else {
372 memset(&aad[24], 0, ETH_ALEN + 376 memset(&aad[24], 0, ETH_ALEN + IEEE80211_QOS_CTL_LEN);
373 aad[24] = qos_tid; 377 aad[24] = qos_tid;
374 } 378 }
375 <<
376 return qos_tid; <<
377 } 379 }
378 380
379 static void ccmp_special_blocks(struct sk_buff <<
380 bool spp_amsdu <<
381 { <<
382 struct ieee80211_hdr *hdr = (struct ie <<
383 u8 qos_tid = ccmp_gcmp_aad(skb, aad, s <<
384 <<
385 /* In CCM, the initial vectors (IV) us <<
386 * mode authentication are not allowed <<
387 * from this vector b_0. We only set L <<
388 * data size can be represented in (L+ <<
389 * care of storing the data length in <<
390 * and clearing the other bits as is r <<
391 */ <<
392 b_0[0] = 0x1; <<
393 <<
394 /* Nonce: Nonce Flags | A2 | PN <<
395 * Nonce Flags: Priority (b0..b3) | Ma <<
396 */ <<
397 b_0[1] = qos_tid | (ieee80211_is_mgmt( <<
398 memcpy(&b_0[2], hdr->addr2, ETH_ALEN); <<
399 memcpy(&b_0[8], pn, IEEE80211_CCMP_PN_ <<
400 } <<
401 381
402 static inline void ccmp_pn2hdr(u8 *hdr, u8 *pn 382 static inline void ccmp_pn2hdr(u8 *hdr, u8 *pn, int key_id)
403 { 383 {
404 hdr[0] = pn[5]; 384 hdr[0] = pn[5];
405 hdr[1] = pn[4]; 385 hdr[1] = pn[4];
406 hdr[2] = 0; 386 hdr[2] = 0;
407 hdr[3] = 0x20 | (key_id << 6); 387 hdr[3] = 0x20 | (key_id << 6);
408 hdr[4] = pn[3]; 388 hdr[4] = pn[3];
409 hdr[5] = pn[2]; 389 hdr[5] = pn[2];
410 hdr[6] = pn[1]; 390 hdr[6] = pn[1];
411 hdr[7] = pn[0]; 391 hdr[7] = pn[0];
412 } 392 }
413 393
414 394
415 static inline void ccmp_hdr2pn(u8 *pn, u8 *hdr 395 static inline void ccmp_hdr2pn(u8 *pn, u8 *hdr)
416 { 396 {
417 pn[0] = hdr[7]; 397 pn[0] = hdr[7];
418 pn[1] = hdr[6]; 398 pn[1] = hdr[6];
419 pn[2] = hdr[5]; 399 pn[2] = hdr[5];
420 pn[3] = hdr[4]; 400 pn[3] = hdr[4];
421 pn[4] = hdr[1]; 401 pn[4] = hdr[1];
422 pn[5] = hdr[0]; 402 pn[5] = hdr[0];
423 } 403 }
424 404
425 405
426 static int ccmp_encrypt_skb(struct ieee80211_t 406 static int ccmp_encrypt_skb(struct ieee80211_tx_data *tx, struct sk_buff *skb,
427 unsigned int mic_l 407 unsigned int mic_len)
428 { 408 {
429 struct ieee80211_hdr *hdr = (struct ie 409 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
430 struct ieee80211_key *key = tx->key; 410 struct ieee80211_key *key = tx->key;
431 struct ieee80211_tx_info *info = IEEE8 411 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
432 int hdrlen, len, tail; 412 int hdrlen, len, tail;
433 u8 *pos; 413 u8 *pos;
434 u8 pn[6]; 414 u8 pn[6];
435 u64 pn64; 415 u64 pn64;
436 u8 aad[CCM_AAD_LEN]; 416 u8 aad[CCM_AAD_LEN];
437 u8 b_0[AES_BLOCK_SIZE]; 417 u8 b_0[AES_BLOCK_SIZE];
438 418
439 if (info->control.hw_key && 419 if (info->control.hw_key &&
440 !(info->control.hw_key->flags & IE 420 !(info->control.hw_key->flags & IEEE80211_KEY_FLAG_GENERATE_IV) &&
441 !(info->control.hw_key->flags & IE 421 !(info->control.hw_key->flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE) &&
442 !((info->control.hw_key->flags & 422 !((info->control.hw_key->flags &
443 IEEE80211_KEY_FLAG_GENERATE_IV_ 423 IEEE80211_KEY_FLAG_GENERATE_IV_MGMT) &&
444 ieee80211_is_mgmt(hdr->frame_con 424 ieee80211_is_mgmt(hdr->frame_control))) {
445 /* 425 /*
446 * hwaccel has no need for pre 426 * hwaccel has no need for preallocated room for CCMP
447 * header or MIC fields 427 * header or MIC fields
448 */ 428 */
449 return 0; 429 return 0;
450 } 430 }
451 431
452 hdrlen = ieee80211_hdrlen(hdr->frame_c 432 hdrlen = ieee80211_hdrlen(hdr->frame_control);
453 len = skb->len - hdrlen; 433 len = skb->len - hdrlen;
454 434
455 if (info->control.hw_key) 435 if (info->control.hw_key)
456 tail = 0; 436 tail = 0;
457 else 437 else
458 tail = mic_len; 438 tail = mic_len;
459 439
460 if (WARN_ON(skb_tailroom(skb) < tail | 440 if (WARN_ON(skb_tailroom(skb) < tail ||
461 skb_headroom(skb) < IEEE80 441 skb_headroom(skb) < IEEE80211_CCMP_HDR_LEN))
462 return -1; 442 return -1;
463 443
464 pos = skb_push(skb, IEEE80211_CCMP_HDR 444 pos = skb_push(skb, IEEE80211_CCMP_HDR_LEN);
465 memmove(pos, pos + IEEE80211_CCMP_HDR_ 445 memmove(pos, pos + IEEE80211_CCMP_HDR_LEN, hdrlen);
466 446
467 /* the HW only needs room for the IV, 447 /* the HW only needs room for the IV, but not the actual IV */
468 if (info->control.hw_key && 448 if (info->control.hw_key &&
469 (info->control.hw_key->flags & IEE 449 (info->control.hw_key->flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE))
470 return 0; 450 return 0;
471 451
>> 452 hdr = (struct ieee80211_hdr *) pos;
472 pos += hdrlen; 453 pos += hdrlen;
473 454
474 pn64 = atomic64_inc_return(&key->conf. 455 pn64 = atomic64_inc_return(&key->conf.tx_pn);
475 456
476 pn[5] = pn64; 457 pn[5] = pn64;
477 pn[4] = pn64 >> 8; 458 pn[4] = pn64 >> 8;
478 pn[3] = pn64 >> 16; 459 pn[3] = pn64 >> 16;
479 pn[2] = pn64 >> 24; 460 pn[2] = pn64 >> 24;
480 pn[1] = pn64 >> 32; 461 pn[1] = pn64 >> 32;
481 pn[0] = pn64 >> 40; 462 pn[0] = pn64 >> 40;
482 463
483 ccmp_pn2hdr(pos, pn, key->conf.keyidx) 464 ccmp_pn2hdr(pos, pn, key->conf.keyidx);
484 465
485 /* hwaccel - with software CCMP header 466 /* hwaccel - with software CCMP header */
486 if (info->control.hw_key) 467 if (info->control.hw_key)
487 return 0; 468 return 0;
488 469
489 pos += IEEE80211_CCMP_HDR_LEN; 470 pos += IEEE80211_CCMP_HDR_LEN;
490 ccmp_special_blocks(skb, pn, b_0, aad, !! 471 ccmp_special_blocks(skb, pn, b_0, aad);
491 key->conf.flags & <<
492 return ieee80211_aes_ccm_encrypt(key-> 472 return ieee80211_aes_ccm_encrypt(key->u.ccmp.tfm, b_0, aad, pos, len,
493 skb_p 473 skb_put(skb, mic_len));
494 } 474 }
495 475
496 476
497 ieee80211_tx_result 477 ieee80211_tx_result
498 ieee80211_crypto_ccmp_encrypt(struct ieee80211 478 ieee80211_crypto_ccmp_encrypt(struct ieee80211_tx_data *tx,
499 unsigned int mic 479 unsigned int mic_len)
500 { 480 {
501 struct sk_buff *skb; 481 struct sk_buff *skb;
502 482
503 ieee80211_tx_set_protected(tx); 483 ieee80211_tx_set_protected(tx);
504 484
505 skb_queue_walk(&tx->skbs, skb) { 485 skb_queue_walk(&tx->skbs, skb) {
506 if (ccmp_encrypt_skb(tx, skb, 486 if (ccmp_encrypt_skb(tx, skb, mic_len) < 0)
507 return TX_DROP; 487 return TX_DROP;
508 } 488 }
509 489
510 return TX_CONTINUE; 490 return TX_CONTINUE;
511 } 491 }
512 492
513 493
514 ieee80211_rx_result 494 ieee80211_rx_result
515 ieee80211_crypto_ccmp_decrypt(struct ieee80211 495 ieee80211_crypto_ccmp_decrypt(struct ieee80211_rx_data *rx,
516 unsigned int mic 496 unsigned int mic_len)
517 { 497 {
518 struct ieee80211_hdr *hdr = (struct ie 498 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data;
519 int hdrlen; 499 int hdrlen;
520 struct ieee80211_key *key = rx->key; 500 struct ieee80211_key *key = rx->key;
521 struct sk_buff *skb = rx->skb; 501 struct sk_buff *skb = rx->skb;
522 struct ieee80211_rx_status *status = I 502 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
523 u8 pn[IEEE80211_CCMP_PN_LEN]; 503 u8 pn[IEEE80211_CCMP_PN_LEN];
524 int data_len; 504 int data_len;
525 int queue; 505 int queue;
526 506
527 hdrlen = ieee80211_hdrlen(hdr->frame_c 507 hdrlen = ieee80211_hdrlen(hdr->frame_control);
528 508
529 if (!ieee80211_is_data(hdr->frame_cont 509 if (!ieee80211_is_data(hdr->frame_control) &&
530 !ieee80211_is_robust_mgmt_frame(sk 510 !ieee80211_is_robust_mgmt_frame(skb))
531 return RX_CONTINUE; 511 return RX_CONTINUE;
532 512
533 if (status->flag & RX_FLAG_DECRYPTED) 513 if (status->flag & RX_FLAG_DECRYPTED) {
534 if (!pskb_may_pull(rx->skb, hd 514 if (!pskb_may_pull(rx->skb, hdrlen + IEEE80211_CCMP_HDR_LEN))
535 return RX_DROP_U_SHORT !! 515 return RX_DROP_UNUSABLE;
536 if (status->flag & RX_FLAG_MIC 516 if (status->flag & RX_FLAG_MIC_STRIPPED)
537 mic_len = 0; 517 mic_len = 0;
538 } else { 518 } else {
539 if (skb_linearize(rx->skb)) 519 if (skb_linearize(rx->skb))
540 return RX_DROP_U_OOM; !! 520 return RX_DROP_UNUSABLE;
541 } 521 }
542 522
543 /* reload hdr - skb might have been re 523 /* reload hdr - skb might have been reallocated */
544 hdr = (void *)rx->skb->data; 524 hdr = (void *)rx->skb->data;
545 525
546 data_len = skb->len - hdrlen - IEEE802 526 data_len = skb->len - hdrlen - IEEE80211_CCMP_HDR_LEN - mic_len;
547 if (!rx->sta || data_len < 0) 527 if (!rx->sta || data_len < 0)
548 return RX_DROP_U_SHORT_CCMP; !! 528 return RX_DROP_UNUSABLE;
549 529
550 if (!(status->flag & RX_FLAG_PN_VALIDA 530 if (!(status->flag & RX_FLAG_PN_VALIDATED)) {
551 int res; 531 int res;
552 532
553 ccmp_hdr2pn(pn, skb->data + hd 533 ccmp_hdr2pn(pn, skb->data + hdrlen);
554 534
555 queue = rx->security_idx; 535 queue = rx->security_idx;
556 536
557 res = memcmp(pn, key->u.ccmp.r 537 res = memcmp(pn, key->u.ccmp.rx_pn[queue],
558 IEEE80211_CCMP_PN 538 IEEE80211_CCMP_PN_LEN);
559 if (res < 0 || 539 if (res < 0 ||
560 (!res && !(status->flag & 540 (!res && !(status->flag & RX_FLAG_ALLOW_SAME_PN))) {
561 key->u.ccmp.replays++; 541 key->u.ccmp.replays++;
562 return RX_DROP_U_REPLA !! 542 return RX_DROP_UNUSABLE;
563 } 543 }
564 544
565 if (!(status->flag & RX_FLAG_D 545 if (!(status->flag & RX_FLAG_DECRYPTED)) {
566 u8 aad[2 * AES_BLOCK_S 546 u8 aad[2 * AES_BLOCK_SIZE];
567 u8 b_0[AES_BLOCK_SIZE] 547 u8 b_0[AES_BLOCK_SIZE];
568 /* hardware didn't dec 548 /* hardware didn't decrypt/verify MIC */
569 ccmp_special_blocks(sk !! 549 ccmp_special_blocks(skb, pn, b_0, aad);
570 ke <<
571 550
572 if (ieee80211_aes_ccm_ 551 if (ieee80211_aes_ccm_decrypt(
573 key->u.ccm 552 key->u.ccmp.tfm, b_0, aad,
574 skb->data 553 skb->data + hdrlen + IEEE80211_CCMP_HDR_LEN,
575 data_len, 554 data_len,
576 skb->data 555 skb->data + skb->len - mic_len))
577 return RX_DROP !! 556 return RX_DROP_UNUSABLE;
578 } 557 }
579 558
580 memcpy(key->u.ccmp.rx_pn[queue 559 memcpy(key->u.ccmp.rx_pn[queue], pn, IEEE80211_CCMP_PN_LEN);
581 if (unlikely(ieee80211_is_frag 560 if (unlikely(ieee80211_is_frag(hdr)))
582 memcpy(rx->ccm_gcm.pn, 561 memcpy(rx->ccm_gcm.pn, pn, IEEE80211_CCMP_PN_LEN);
583 } 562 }
584 563
585 /* Remove CCMP header and MIC */ 564 /* Remove CCMP header and MIC */
586 if (pskb_trim(skb, skb->len - mic_len) 565 if (pskb_trim(skb, skb->len - mic_len))
587 return RX_DROP_U_SHORT_CCMP_MI !! 566 return RX_DROP_UNUSABLE;
588 memmove(skb->data + IEEE80211_CCMP_HDR 567 memmove(skb->data + IEEE80211_CCMP_HDR_LEN, skb->data, hdrlen);
589 skb_pull(skb, IEEE80211_CCMP_HDR_LEN); 568 skb_pull(skb, IEEE80211_CCMP_HDR_LEN);
590 569
591 return RX_CONTINUE; 570 return RX_CONTINUE;
592 } 571 }
593 572
594 static void gcmp_special_blocks(struct sk_buff !! 573 static void gcmp_special_blocks(struct sk_buff *skb, u8 *pn, u8 *j_0, u8 *aad)
595 bool spp_amsdu <<
596 { 574 {
597 struct ieee80211_hdr *hdr = (void *)sk !! 575 __le16 mask_fc;
>> 576 u8 qos_tid;
>> 577 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
598 578
599 memcpy(j_0, hdr->addr2, ETH_ALEN); 579 memcpy(j_0, hdr->addr2, ETH_ALEN);
600 memcpy(&j_0[ETH_ALEN], pn, IEEE80211_G 580 memcpy(&j_0[ETH_ALEN], pn, IEEE80211_GCMP_PN_LEN);
601 j_0[13] = 0; 581 j_0[13] = 0;
602 j_0[14] = 0; 582 j_0[14] = 0;
603 j_0[AES_BLOCK_SIZE - 1] = 0x01; 583 j_0[AES_BLOCK_SIZE - 1] = 0x01;
604 584
605 ccmp_gcmp_aad(skb, aad, spp_amsdu); !! 585 /* AAD (extra authenticate-only data) / masked 802.11 header
>> 586 * FC | A1 | A2 | A3 | SC | [A4] | [QC]
>> 587 */
>> 588 put_unaligned_be16(ieee80211_hdrlen(hdr->frame_control) - 2, &aad[0]);
>> 589 /* Mask FC: zero subtype b4 b5 b6 (if not mgmt)
>> 590 * Retry, PwrMgt, MoreData; set Protected
>> 591 */
>> 592 mask_fc = hdr->frame_control;
>> 593 mask_fc &= ~cpu_to_le16(IEEE80211_FCTL_RETRY |
>> 594 IEEE80211_FCTL_PM | IEEE80211_FCTL_MOREDATA);
>> 595 if (!ieee80211_is_mgmt(hdr->frame_control))
>> 596 mask_fc &= ~cpu_to_le16(0x0070);
>> 597 mask_fc |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
>> 598
>> 599 put_unaligned(mask_fc, (__le16 *)&aad[2]);
>> 600 memcpy(&aad[4], &hdr->addr1, 3 * ETH_ALEN);
>> 601
>> 602 /* Mask Seq#, leave Frag# */
>> 603 aad[22] = *((u8 *)&hdr->seq_ctrl) & 0x0f;
>> 604 aad[23] = 0;
>> 605
>> 606 if (ieee80211_is_data_qos(hdr->frame_control))
>> 607 qos_tid = ieee80211_get_tid(hdr);
>> 608 else
>> 609 qos_tid = 0;
>> 610
>> 611 if (ieee80211_has_a4(hdr->frame_control)) {
>> 612 memcpy(&aad[24], hdr->addr4, ETH_ALEN);
>> 613 aad[30] = qos_tid;
>> 614 aad[31] = 0;
>> 615 } else {
>> 616 memset(&aad[24], 0, ETH_ALEN + IEEE80211_QOS_CTL_LEN);
>> 617 aad[24] = qos_tid;
>> 618 }
606 } 619 }
607 620
608 static inline void gcmp_pn2hdr(u8 *hdr, const 621 static inline void gcmp_pn2hdr(u8 *hdr, const u8 *pn, int key_id)
609 { 622 {
610 hdr[0] = pn[5]; 623 hdr[0] = pn[5];
611 hdr[1] = pn[4]; 624 hdr[1] = pn[4];
612 hdr[2] = 0; 625 hdr[2] = 0;
613 hdr[3] = 0x20 | (key_id << 6); 626 hdr[3] = 0x20 | (key_id << 6);
614 hdr[4] = pn[3]; 627 hdr[4] = pn[3];
615 hdr[5] = pn[2]; 628 hdr[5] = pn[2];
616 hdr[6] = pn[1]; 629 hdr[6] = pn[1];
617 hdr[7] = pn[0]; 630 hdr[7] = pn[0];
618 } 631 }
619 632
620 static inline void gcmp_hdr2pn(u8 *pn, const u 633 static inline void gcmp_hdr2pn(u8 *pn, const u8 *hdr)
621 { 634 {
622 pn[0] = hdr[7]; 635 pn[0] = hdr[7];
623 pn[1] = hdr[6]; 636 pn[1] = hdr[6];
624 pn[2] = hdr[5]; 637 pn[2] = hdr[5];
625 pn[3] = hdr[4]; 638 pn[3] = hdr[4];
626 pn[4] = hdr[1]; 639 pn[4] = hdr[1];
627 pn[5] = hdr[0]; 640 pn[5] = hdr[0];
628 } 641 }
629 642
630 static int gcmp_encrypt_skb(struct ieee80211_t 643 static int gcmp_encrypt_skb(struct ieee80211_tx_data *tx, struct sk_buff *skb)
631 { 644 {
632 struct ieee80211_hdr *hdr = (struct ie 645 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
633 struct ieee80211_key *key = tx->key; 646 struct ieee80211_key *key = tx->key;
634 struct ieee80211_tx_info *info = IEEE8 647 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
635 int hdrlen, len, tail; 648 int hdrlen, len, tail;
636 u8 *pos; 649 u8 *pos;
637 u8 pn[6]; 650 u8 pn[6];
638 u64 pn64; 651 u64 pn64;
639 u8 aad[GCM_AAD_LEN]; 652 u8 aad[GCM_AAD_LEN];
640 u8 j_0[AES_BLOCK_SIZE]; 653 u8 j_0[AES_BLOCK_SIZE];
641 654
642 if (info->control.hw_key && 655 if (info->control.hw_key &&
643 !(info->control.hw_key->flags & IE 656 !(info->control.hw_key->flags & IEEE80211_KEY_FLAG_GENERATE_IV) &&
644 !(info->control.hw_key->flags & IE 657 !(info->control.hw_key->flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE) &&
645 !((info->control.hw_key->flags & 658 !((info->control.hw_key->flags &
646 IEEE80211_KEY_FLAG_GENERATE_IV_ 659 IEEE80211_KEY_FLAG_GENERATE_IV_MGMT) &&
647 ieee80211_is_mgmt(hdr->frame_con 660 ieee80211_is_mgmt(hdr->frame_control))) {
648 /* hwaccel has no need for pre 661 /* hwaccel has no need for preallocated room for GCMP
649 * header or MIC fields 662 * header or MIC fields
650 */ 663 */
651 return 0; 664 return 0;
652 } 665 }
653 666
654 hdrlen = ieee80211_hdrlen(hdr->frame_c 667 hdrlen = ieee80211_hdrlen(hdr->frame_control);
655 len = skb->len - hdrlen; 668 len = skb->len - hdrlen;
656 669
657 if (info->control.hw_key) 670 if (info->control.hw_key)
658 tail = 0; 671 tail = 0;
659 else 672 else
660 tail = IEEE80211_GCMP_MIC_LEN; 673 tail = IEEE80211_GCMP_MIC_LEN;
661 674
662 if (WARN_ON(skb_tailroom(skb) < tail | 675 if (WARN_ON(skb_tailroom(skb) < tail ||
663 skb_headroom(skb) < IEEE80 676 skb_headroom(skb) < IEEE80211_GCMP_HDR_LEN))
664 return -1; 677 return -1;
665 678
666 pos = skb_push(skb, IEEE80211_GCMP_HDR 679 pos = skb_push(skb, IEEE80211_GCMP_HDR_LEN);
667 memmove(pos, pos + IEEE80211_GCMP_HDR_ 680 memmove(pos, pos + IEEE80211_GCMP_HDR_LEN, hdrlen);
668 skb_set_network_header(skb, skb_networ 681 skb_set_network_header(skb, skb_network_offset(skb) +
669 IEEE80211_ 682 IEEE80211_GCMP_HDR_LEN);
670 683
671 /* the HW only needs room for the IV, 684 /* the HW only needs room for the IV, but not the actual IV */
672 if (info->control.hw_key && 685 if (info->control.hw_key &&
673 (info->control.hw_key->flags & IEE 686 (info->control.hw_key->flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE))
674 return 0; 687 return 0;
675 688
>> 689 hdr = (struct ieee80211_hdr *)pos;
676 pos += hdrlen; 690 pos += hdrlen;
677 691
678 pn64 = atomic64_inc_return(&key->conf. 692 pn64 = atomic64_inc_return(&key->conf.tx_pn);
679 693
680 pn[5] = pn64; 694 pn[5] = pn64;
681 pn[4] = pn64 >> 8; 695 pn[4] = pn64 >> 8;
682 pn[3] = pn64 >> 16; 696 pn[3] = pn64 >> 16;
683 pn[2] = pn64 >> 24; 697 pn[2] = pn64 >> 24;
684 pn[1] = pn64 >> 32; 698 pn[1] = pn64 >> 32;
685 pn[0] = pn64 >> 40; 699 pn[0] = pn64 >> 40;
686 700
687 gcmp_pn2hdr(pos, pn, key->conf.keyidx) 701 gcmp_pn2hdr(pos, pn, key->conf.keyidx);
688 702
689 /* hwaccel - with software GCMP header 703 /* hwaccel - with software GCMP header */
690 if (info->control.hw_key) 704 if (info->control.hw_key)
691 return 0; 705 return 0;
692 706
693 pos += IEEE80211_GCMP_HDR_LEN; 707 pos += IEEE80211_GCMP_HDR_LEN;
694 gcmp_special_blocks(skb, pn, j_0, aad, !! 708 gcmp_special_blocks(skb, pn, j_0, aad);
695 key->conf.flags & <<
696 return ieee80211_aes_gcm_encrypt(key-> 709 return ieee80211_aes_gcm_encrypt(key->u.gcmp.tfm, j_0, aad, pos, len,
697 skb_p 710 skb_put(skb, IEEE80211_GCMP_MIC_LEN));
698 } 711 }
699 712
700 ieee80211_tx_result 713 ieee80211_tx_result
701 ieee80211_crypto_gcmp_encrypt(struct ieee80211 714 ieee80211_crypto_gcmp_encrypt(struct ieee80211_tx_data *tx)
702 { 715 {
703 struct sk_buff *skb; 716 struct sk_buff *skb;
704 717
705 ieee80211_tx_set_protected(tx); 718 ieee80211_tx_set_protected(tx);
706 719
707 skb_queue_walk(&tx->skbs, skb) { 720 skb_queue_walk(&tx->skbs, skb) {
708 if (gcmp_encrypt_skb(tx, skb) 721 if (gcmp_encrypt_skb(tx, skb) < 0)
709 return TX_DROP; 722 return TX_DROP;
710 } 723 }
711 724
712 return TX_CONTINUE; 725 return TX_CONTINUE;
713 } 726 }
714 727
715 ieee80211_rx_result 728 ieee80211_rx_result
716 ieee80211_crypto_gcmp_decrypt(struct ieee80211 729 ieee80211_crypto_gcmp_decrypt(struct ieee80211_rx_data *rx)
717 { 730 {
718 struct ieee80211_hdr *hdr = (struct ie 731 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data;
719 int hdrlen; 732 int hdrlen;
720 struct ieee80211_key *key = rx->key; 733 struct ieee80211_key *key = rx->key;
721 struct sk_buff *skb = rx->skb; 734 struct sk_buff *skb = rx->skb;
722 struct ieee80211_rx_status *status = I 735 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
723 u8 pn[IEEE80211_GCMP_PN_LEN]; 736 u8 pn[IEEE80211_GCMP_PN_LEN];
724 int data_len, queue, mic_len = IEEE802 737 int data_len, queue, mic_len = IEEE80211_GCMP_MIC_LEN;
725 738
726 hdrlen = ieee80211_hdrlen(hdr->frame_c 739 hdrlen = ieee80211_hdrlen(hdr->frame_control);
727 740
728 if (!ieee80211_is_data(hdr->frame_cont 741 if (!ieee80211_is_data(hdr->frame_control) &&
729 !ieee80211_is_robust_mgmt_frame(sk 742 !ieee80211_is_robust_mgmt_frame(skb))
730 return RX_CONTINUE; 743 return RX_CONTINUE;
731 744
732 if (status->flag & RX_FLAG_DECRYPTED) 745 if (status->flag & RX_FLAG_DECRYPTED) {
733 if (!pskb_may_pull(rx->skb, hd 746 if (!pskb_may_pull(rx->skb, hdrlen + IEEE80211_GCMP_HDR_LEN))
734 return RX_DROP_U_SHORT !! 747 return RX_DROP_UNUSABLE;
735 if (status->flag & RX_FLAG_MIC 748 if (status->flag & RX_FLAG_MIC_STRIPPED)
736 mic_len = 0; 749 mic_len = 0;
737 } else { 750 } else {
738 if (skb_linearize(rx->skb)) 751 if (skb_linearize(rx->skb))
739 return RX_DROP_U_OOM; !! 752 return RX_DROP_UNUSABLE;
740 } 753 }
741 754
742 /* reload hdr - skb might have been re 755 /* reload hdr - skb might have been reallocated */
743 hdr = (void *)rx->skb->data; 756 hdr = (void *)rx->skb->data;
744 757
745 data_len = skb->len - hdrlen - IEEE802 758 data_len = skb->len - hdrlen - IEEE80211_GCMP_HDR_LEN - mic_len;
746 if (!rx->sta || data_len < 0) 759 if (!rx->sta || data_len < 0)
747 return RX_DROP_U_SHORT_GCMP; !! 760 return RX_DROP_UNUSABLE;
748 761
749 if (!(status->flag & RX_FLAG_PN_VALIDA 762 if (!(status->flag & RX_FLAG_PN_VALIDATED)) {
750 int res; 763 int res;
751 764
752 gcmp_hdr2pn(pn, skb->data + hd 765 gcmp_hdr2pn(pn, skb->data + hdrlen);
753 766
754 queue = rx->security_idx; 767 queue = rx->security_idx;
755 768
756 res = memcmp(pn, key->u.gcmp.r 769 res = memcmp(pn, key->u.gcmp.rx_pn[queue],
757 IEEE80211_GCMP_PN 770 IEEE80211_GCMP_PN_LEN);
758 if (res < 0 || 771 if (res < 0 ||
759 (!res && !(status->flag & 772 (!res && !(status->flag & RX_FLAG_ALLOW_SAME_PN))) {
760 key->u.gcmp.replays++; 773 key->u.gcmp.replays++;
761 return RX_DROP_U_REPLA !! 774 return RX_DROP_UNUSABLE;
762 } 775 }
763 776
764 if (!(status->flag & RX_FLAG_D 777 if (!(status->flag & RX_FLAG_DECRYPTED)) {
765 u8 aad[2 * AES_BLOCK_S 778 u8 aad[2 * AES_BLOCK_SIZE];
766 u8 j_0[AES_BLOCK_SIZE] 779 u8 j_0[AES_BLOCK_SIZE];
767 /* hardware didn't dec 780 /* hardware didn't decrypt/verify MIC */
768 gcmp_special_blocks(sk !! 781 gcmp_special_blocks(skb, pn, j_0, aad);
769 ke <<
770 782
771 if (ieee80211_aes_gcm_ 783 if (ieee80211_aes_gcm_decrypt(
772 key->u.gcm 784 key->u.gcmp.tfm, j_0, aad,
773 skb->data 785 skb->data + hdrlen + IEEE80211_GCMP_HDR_LEN,
774 data_len, 786 data_len,
775 skb->data 787 skb->data + skb->len -
776 IEEE80211_ 788 IEEE80211_GCMP_MIC_LEN))
777 return RX_DROP !! 789 return RX_DROP_UNUSABLE;
778 } 790 }
779 791
780 memcpy(key->u.gcmp.rx_pn[queue 792 memcpy(key->u.gcmp.rx_pn[queue], pn, IEEE80211_GCMP_PN_LEN);
781 if (unlikely(ieee80211_is_frag 793 if (unlikely(ieee80211_is_frag(hdr)))
782 memcpy(rx->ccm_gcm.pn, 794 memcpy(rx->ccm_gcm.pn, pn, IEEE80211_CCMP_PN_LEN);
783 } 795 }
784 796
785 /* Remove GCMP header and MIC */ 797 /* Remove GCMP header and MIC */
786 if (pskb_trim(skb, skb->len - mic_len) 798 if (pskb_trim(skb, skb->len - mic_len))
787 return RX_DROP_U_SHORT_GCMP_MI !! 799 return RX_DROP_UNUSABLE;
788 memmove(skb->data + IEEE80211_GCMP_HDR 800 memmove(skb->data + IEEE80211_GCMP_HDR_LEN, skb->data, hdrlen);
789 skb_pull(skb, IEEE80211_GCMP_HDR_LEN); 801 skb_pull(skb, IEEE80211_GCMP_HDR_LEN);
790 802
791 return RX_CONTINUE; 803 return RX_CONTINUE;
792 } 804 }
793 805
>> 806 static ieee80211_tx_result
>> 807 ieee80211_crypto_cs_encrypt(struct ieee80211_tx_data *tx,
>> 808 struct sk_buff *skb)
>> 809 {
>> 810 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
>> 811 struct ieee80211_key *key = tx->key;
>> 812 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
>> 813 int hdrlen;
>> 814 u8 *pos, iv_len = key->conf.iv_len;
>> 815
>> 816 if (info->control.hw_key &&
>> 817 !(info->control.hw_key->flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE)) {
>> 818 /* hwaccel has no need for preallocated head room */
>> 819 return TX_CONTINUE;
>> 820 }
>> 821
>> 822 if (unlikely(skb_headroom(skb) < iv_len &&
>> 823 pskb_expand_head(skb, iv_len, 0, GFP_ATOMIC)))
>> 824 return TX_DROP;
>> 825
>> 826 hdrlen = ieee80211_hdrlen(hdr->frame_control);
>> 827
>> 828 pos = skb_push(skb, iv_len);
>> 829 memmove(pos, pos + iv_len, hdrlen);
>> 830
>> 831 return TX_CONTINUE;
>> 832 }
>> 833
>> 834 static inline int ieee80211_crypto_cs_pn_compare(u8 *pn1, u8 *pn2, int len)
>> 835 {
>> 836 int i;
>> 837
>> 838 /* pn is little endian */
>> 839 for (i = len - 1; i >= 0; i--) {
>> 840 if (pn1[i] < pn2[i])
>> 841 return -1;
>> 842 else if (pn1[i] > pn2[i])
>> 843 return 1;
>> 844 }
>> 845
>> 846 return 0;
>> 847 }
>> 848
>> 849 static ieee80211_rx_result
>> 850 ieee80211_crypto_cs_decrypt(struct ieee80211_rx_data *rx)
>> 851 {
>> 852 struct ieee80211_key *key = rx->key;
>> 853 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data;
>> 854 const struct ieee80211_cipher_scheme *cs = NULL;
>> 855 int hdrlen = ieee80211_hdrlen(hdr->frame_control);
>> 856 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb);
>> 857 int data_len;
>> 858 u8 *rx_pn;
>> 859 u8 *skb_pn;
>> 860 u8 qos_tid;
>> 861
>> 862 if (!rx->sta || !rx->sta->cipher_scheme ||
>> 863 !(status->flag & RX_FLAG_DECRYPTED))
>> 864 return RX_DROP_UNUSABLE;
>> 865
>> 866 if (!ieee80211_is_data(hdr->frame_control))
>> 867 return RX_CONTINUE;
>> 868
>> 869 cs = rx->sta->cipher_scheme;
>> 870
>> 871 data_len = rx->skb->len - hdrlen - cs->hdr_len;
>> 872
>> 873 if (data_len < 0)
>> 874 return RX_DROP_UNUSABLE;
>> 875
>> 876 if (ieee80211_is_data_qos(hdr->frame_control))
>> 877 qos_tid = ieee80211_get_tid(hdr);
>> 878 else
>> 879 qos_tid = 0;
>> 880
>> 881 if (skb_linearize(rx->skb))
>> 882 return RX_DROP_UNUSABLE;
>> 883
>> 884 hdr = (struct ieee80211_hdr *)rx->skb->data;
>> 885
>> 886 rx_pn = key->u.gen.rx_pn[qos_tid];
>> 887 skb_pn = rx->skb->data + hdrlen + cs->pn_off;
>> 888
>> 889 if (ieee80211_crypto_cs_pn_compare(skb_pn, rx_pn, cs->pn_len) <= 0)
>> 890 return RX_DROP_UNUSABLE;
>> 891
>> 892 memcpy(rx_pn, skb_pn, cs->pn_len);
>> 893
>> 894 /* remove security header and MIC */
>> 895 if (pskb_trim(rx->skb, rx->skb->len - cs->mic_len))
>> 896 return RX_DROP_UNUSABLE;
>> 897
>> 898 memmove(rx->skb->data + cs->hdr_len, rx->skb->data, hdrlen);
>> 899 skb_pull(rx->skb, cs->hdr_len);
>> 900
>> 901 return RX_CONTINUE;
>> 902 }
>> 903
794 static void bip_aad(struct sk_buff *skb, u8 *a 904 static void bip_aad(struct sk_buff *skb, u8 *aad)
795 { 905 {
796 __le16 mask_fc; 906 __le16 mask_fc;
797 struct ieee80211_hdr *hdr = (struct ie 907 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
798 908
799 /* BIP AAD: FC(masked) || A1 || A2 || 909 /* BIP AAD: FC(masked) || A1 || A2 || A3 */
800 910
801 /* FC type/subtype */ 911 /* FC type/subtype */
802 /* Mask FC Retry, PwrMgt, MoreData fla 912 /* Mask FC Retry, PwrMgt, MoreData flags to zero */
803 mask_fc = hdr->frame_control; 913 mask_fc = hdr->frame_control;
804 mask_fc &= ~cpu_to_le16(IEEE80211_FCTL 914 mask_fc &= ~cpu_to_le16(IEEE80211_FCTL_RETRY | IEEE80211_FCTL_PM |
805 IEEE80211_FCTL 915 IEEE80211_FCTL_MOREDATA);
806 put_unaligned(mask_fc, (__le16 *) &aad 916 put_unaligned(mask_fc, (__le16 *) &aad[0]);
807 /* A1 || A2 || A3 */ 917 /* A1 || A2 || A3 */
808 memcpy(aad + 2, &hdr->addrs, 3 * ETH_A !! 918 memcpy(aad + 2, &hdr->addr1, 3 * ETH_ALEN);
809 } 919 }
810 920
811 921
812 static inline void bip_ipn_set64(u8 *d, u64 pn 922 static inline void bip_ipn_set64(u8 *d, u64 pn)
813 { 923 {
814 *d++ = pn; 924 *d++ = pn;
815 *d++ = pn >> 8; 925 *d++ = pn >> 8;
816 *d++ = pn >> 16; 926 *d++ = pn >> 16;
817 *d++ = pn >> 24; 927 *d++ = pn >> 24;
818 *d++ = pn >> 32; 928 *d++ = pn >> 32;
819 *d = pn >> 40; 929 *d = pn >> 40;
820 } 930 }
821 931
822 static inline void bip_ipn_swap(u8 *d, const u 932 static inline void bip_ipn_swap(u8 *d, const u8 *s)
823 { 933 {
824 *d++ = s[5]; 934 *d++ = s[5];
825 *d++ = s[4]; 935 *d++ = s[4];
826 *d++ = s[3]; 936 *d++ = s[3];
827 *d++ = s[2]; 937 *d++ = s[2];
828 *d++ = s[1]; 938 *d++ = s[1];
829 *d = s[0]; 939 *d = s[0];
830 } 940 }
831 941
832 942
833 ieee80211_tx_result 943 ieee80211_tx_result
834 ieee80211_crypto_aes_cmac_encrypt(struct ieee8 944 ieee80211_crypto_aes_cmac_encrypt(struct ieee80211_tx_data *tx)
835 { 945 {
836 struct sk_buff *skb; 946 struct sk_buff *skb;
837 struct ieee80211_tx_info *info; 947 struct ieee80211_tx_info *info;
838 struct ieee80211_key *key = tx->key; 948 struct ieee80211_key *key = tx->key;
839 struct ieee80211_mmie *mmie; 949 struct ieee80211_mmie *mmie;
840 u8 aad[20]; 950 u8 aad[20];
841 u64 pn64; 951 u64 pn64;
842 952
843 if (WARN_ON(skb_queue_len(&tx->skbs) ! 953 if (WARN_ON(skb_queue_len(&tx->skbs) != 1))
844 return TX_DROP; 954 return TX_DROP;
845 955
846 skb = skb_peek(&tx->skbs); 956 skb = skb_peek(&tx->skbs);
847 957
848 info = IEEE80211_SKB_CB(skb); 958 info = IEEE80211_SKB_CB(skb);
849 959
850 if (info->control.hw_key && 960 if (info->control.hw_key &&
851 !(key->conf.flags & IEEE80211_KEY_ 961 !(key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_MMIE))
852 return TX_CONTINUE; 962 return TX_CONTINUE;
853 963
854 if (WARN_ON(skb_tailroom(skb) < sizeof 964 if (WARN_ON(skb_tailroom(skb) < sizeof(*mmie)))
855 return TX_DROP; 965 return TX_DROP;
856 966
857 mmie = skb_put(skb, sizeof(*mmie)); 967 mmie = skb_put(skb, sizeof(*mmie));
858 mmie->element_id = WLAN_EID_MMIE; 968 mmie->element_id = WLAN_EID_MMIE;
859 mmie->length = sizeof(*mmie) - 2; 969 mmie->length = sizeof(*mmie) - 2;
860 mmie->key_id = cpu_to_le16(key->conf.k 970 mmie->key_id = cpu_to_le16(key->conf.keyidx);
861 971
862 /* PN = PN + 1 */ 972 /* PN = PN + 1 */
863 pn64 = atomic64_inc_return(&key->conf. 973 pn64 = atomic64_inc_return(&key->conf.tx_pn);
864 974
865 bip_ipn_set64(mmie->sequence_number, p 975 bip_ipn_set64(mmie->sequence_number, pn64);
866 976
867 if (info->control.hw_key) 977 if (info->control.hw_key)
868 return TX_CONTINUE; 978 return TX_CONTINUE;
869 979
870 bip_aad(skb, aad); 980 bip_aad(skb, aad);
871 981
872 /* 982 /*
873 * MIC = AES-128-CMAC(IGTK, AAD || Man 983 * MIC = AES-128-CMAC(IGTK, AAD || Management Frame Body || MMIE, 64)
874 */ 984 */
875 ieee80211_aes_cmac(key->u.aes_cmac.tfm 985 ieee80211_aes_cmac(key->u.aes_cmac.tfm, aad,
876 skb->data + 24, skb 986 skb->data + 24, skb->len - 24, mmie->mic);
877 987
878 return TX_CONTINUE; 988 return TX_CONTINUE;
879 } 989 }
880 990
881 ieee80211_tx_result 991 ieee80211_tx_result
882 ieee80211_crypto_aes_cmac_256_encrypt(struct i 992 ieee80211_crypto_aes_cmac_256_encrypt(struct ieee80211_tx_data *tx)
883 { 993 {
884 struct sk_buff *skb; 994 struct sk_buff *skb;
885 struct ieee80211_tx_info *info; 995 struct ieee80211_tx_info *info;
886 struct ieee80211_key *key = tx->key; 996 struct ieee80211_key *key = tx->key;
887 struct ieee80211_mmie_16 *mmie; 997 struct ieee80211_mmie_16 *mmie;
888 u8 aad[20]; 998 u8 aad[20];
889 u64 pn64; 999 u64 pn64;
890 1000
891 if (WARN_ON(skb_queue_len(&tx->skbs) ! 1001 if (WARN_ON(skb_queue_len(&tx->skbs) != 1))
892 return TX_DROP; 1002 return TX_DROP;
893 1003
894 skb = skb_peek(&tx->skbs); 1004 skb = skb_peek(&tx->skbs);
895 1005
896 info = IEEE80211_SKB_CB(skb); 1006 info = IEEE80211_SKB_CB(skb);
897 1007
898 if (info->control.hw_key && !! 1008 if (info->control.hw_key)
899 !(key->conf.flags & IEEE80211_KEY_ <<
900 return TX_CONTINUE; 1009 return TX_CONTINUE;
901 1010
902 if (WARN_ON(skb_tailroom(skb) < sizeof 1011 if (WARN_ON(skb_tailroom(skb) < sizeof(*mmie)))
903 return TX_DROP; 1012 return TX_DROP;
904 1013
905 mmie = skb_put(skb, sizeof(*mmie)); 1014 mmie = skb_put(skb, sizeof(*mmie));
906 mmie->element_id = WLAN_EID_MMIE; 1015 mmie->element_id = WLAN_EID_MMIE;
907 mmie->length = sizeof(*mmie) - 2; 1016 mmie->length = sizeof(*mmie) - 2;
908 mmie->key_id = cpu_to_le16(key->conf.k 1017 mmie->key_id = cpu_to_le16(key->conf.keyidx);
909 1018
910 /* PN = PN + 1 */ 1019 /* PN = PN + 1 */
911 pn64 = atomic64_inc_return(&key->conf. 1020 pn64 = atomic64_inc_return(&key->conf.tx_pn);
912 1021
913 bip_ipn_set64(mmie->sequence_number, p 1022 bip_ipn_set64(mmie->sequence_number, pn64);
914 1023
915 if (info->control.hw_key) <<
916 return TX_CONTINUE; <<
917 <<
918 bip_aad(skb, aad); 1024 bip_aad(skb, aad);
919 1025
920 /* MIC = AES-256-CMAC(IGTK, AAD || Man 1026 /* MIC = AES-256-CMAC(IGTK, AAD || Management Frame Body || MMIE, 128)
921 */ 1027 */
922 ieee80211_aes_cmac_256(key->u.aes_cmac 1028 ieee80211_aes_cmac_256(key->u.aes_cmac.tfm, aad,
923 skb->data + 24, 1029 skb->data + 24, skb->len - 24, mmie->mic);
924 1030
925 return TX_CONTINUE; 1031 return TX_CONTINUE;
926 } 1032 }
927 1033
928 ieee80211_rx_result 1034 ieee80211_rx_result
929 ieee80211_crypto_aes_cmac_decrypt(struct ieee8 1035 ieee80211_crypto_aes_cmac_decrypt(struct ieee80211_rx_data *rx)
930 { 1036 {
931 struct sk_buff *skb = rx->skb; 1037 struct sk_buff *skb = rx->skb;
932 struct ieee80211_rx_status *status = I 1038 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
933 struct ieee80211_key *key = rx->key; 1039 struct ieee80211_key *key = rx->key;
934 struct ieee80211_mmie *mmie; 1040 struct ieee80211_mmie *mmie;
935 u8 aad[20], mic[8], ipn[6]; 1041 u8 aad[20], mic[8], ipn[6];
936 struct ieee80211_hdr *hdr = (struct ie 1042 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
937 1043
938 if (!ieee80211_is_mgmt(hdr->frame_cont 1044 if (!ieee80211_is_mgmt(hdr->frame_control))
939 return RX_CONTINUE; 1045 return RX_CONTINUE;
940 1046
941 /* management frames are already linea 1047 /* management frames are already linear */
942 1048
943 if (skb->len < 24 + sizeof(*mmie)) 1049 if (skb->len < 24 + sizeof(*mmie))
944 return RX_DROP_U_SHORT_CMAC; !! 1050 return RX_DROP_UNUSABLE;
945 1051
946 mmie = (struct ieee80211_mmie *) 1052 mmie = (struct ieee80211_mmie *)
947 (skb->data + skb->len - sizeof 1053 (skb->data + skb->len - sizeof(*mmie));
948 if (mmie->element_id != WLAN_EID_MMIE 1054 if (mmie->element_id != WLAN_EID_MMIE ||
949 mmie->length != sizeof(*mmie) - 2) 1055 mmie->length != sizeof(*mmie) - 2)
950 return RX_DROP_U_BAD_MMIE; /* !! 1056 return RX_DROP_UNUSABLE; /* Invalid MMIE */
951 1057
952 bip_ipn_swap(ipn, mmie->sequence_numbe 1058 bip_ipn_swap(ipn, mmie->sequence_number);
953 1059
954 if (memcmp(ipn, key->u.aes_cmac.rx_pn, 1060 if (memcmp(ipn, key->u.aes_cmac.rx_pn, 6) <= 0) {
955 key->u.aes_cmac.replays++; 1061 key->u.aes_cmac.replays++;
956 return RX_DROP_U_REPLAY; !! 1062 return RX_DROP_UNUSABLE;
957 } 1063 }
958 1064
959 if (!(status->flag & RX_FLAG_DECRYPTED 1065 if (!(status->flag & RX_FLAG_DECRYPTED)) {
960 /* hardware didn't decrypt/ver 1066 /* hardware didn't decrypt/verify MIC */
961 bip_aad(skb, aad); 1067 bip_aad(skb, aad);
962 ieee80211_aes_cmac(key->u.aes_ 1068 ieee80211_aes_cmac(key->u.aes_cmac.tfm, aad,
963 skb->data + 1069 skb->data + 24, skb->len - 24, mic);
964 if (crypto_memneq(mic, mmie->m 1070 if (crypto_memneq(mic, mmie->mic, sizeof(mmie->mic))) {
965 key->u.aes_cmac.icverr 1071 key->u.aes_cmac.icverrors++;
966 return RX_DROP_U_MIC_F !! 1072 return RX_DROP_UNUSABLE;
967 } 1073 }
968 } 1074 }
969 1075
970 memcpy(key->u.aes_cmac.rx_pn, ipn, 6); 1076 memcpy(key->u.aes_cmac.rx_pn, ipn, 6);
971 1077
972 /* Remove MMIE */ 1078 /* Remove MMIE */
973 skb_trim(skb, skb->len - sizeof(*mmie) 1079 skb_trim(skb, skb->len - sizeof(*mmie));
974 1080
975 return RX_CONTINUE; 1081 return RX_CONTINUE;
976 } 1082 }
977 1083
978 ieee80211_rx_result 1084 ieee80211_rx_result
979 ieee80211_crypto_aes_cmac_256_decrypt(struct i 1085 ieee80211_crypto_aes_cmac_256_decrypt(struct ieee80211_rx_data *rx)
980 { 1086 {
981 struct sk_buff *skb = rx->skb; 1087 struct sk_buff *skb = rx->skb;
982 struct ieee80211_rx_status *status = I 1088 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
983 struct ieee80211_key *key = rx->key; 1089 struct ieee80211_key *key = rx->key;
984 struct ieee80211_mmie_16 *mmie; 1090 struct ieee80211_mmie_16 *mmie;
985 u8 aad[20], mic[16], ipn[6]; 1091 u8 aad[20], mic[16], ipn[6];
986 struct ieee80211_hdr *hdr = (struct ie 1092 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
987 1093
988 if (!ieee80211_is_mgmt(hdr->frame_cont 1094 if (!ieee80211_is_mgmt(hdr->frame_control))
989 return RX_CONTINUE; 1095 return RX_CONTINUE;
990 1096
991 /* management frames are already linea 1097 /* management frames are already linear */
992 1098
993 if (skb->len < 24 + sizeof(*mmie)) 1099 if (skb->len < 24 + sizeof(*mmie))
994 return RX_DROP_U_SHORT_CMAC256 !! 1100 return RX_DROP_UNUSABLE;
995 1101
996 mmie = (struct ieee80211_mmie_16 *) 1102 mmie = (struct ieee80211_mmie_16 *)
997 (skb->data + skb->len - sizeof 1103 (skb->data + skb->len - sizeof(*mmie));
998 if (mmie->element_id != WLAN_EID_MMIE 1104 if (mmie->element_id != WLAN_EID_MMIE ||
999 mmie->length != sizeof(*mmie) - 2) 1105 mmie->length != sizeof(*mmie) - 2)
1000 return RX_DROP_U_BAD_MMIE; /* !! 1106 return RX_DROP_UNUSABLE; /* Invalid MMIE */
1001 1107
1002 bip_ipn_swap(ipn, mmie->sequence_numb 1108 bip_ipn_swap(ipn, mmie->sequence_number);
1003 1109
1004 if (memcmp(ipn, key->u.aes_cmac.rx_pn 1110 if (memcmp(ipn, key->u.aes_cmac.rx_pn, 6) <= 0) {
1005 key->u.aes_cmac.replays++; 1111 key->u.aes_cmac.replays++;
1006 return RX_DROP_U_REPLAY; !! 1112 return RX_DROP_UNUSABLE;
1007 } 1113 }
1008 1114
1009 if (!(status->flag & RX_FLAG_DECRYPTE 1115 if (!(status->flag & RX_FLAG_DECRYPTED)) {
1010 /* hardware didn't decrypt/ve 1116 /* hardware didn't decrypt/verify MIC */
1011 bip_aad(skb, aad); 1117 bip_aad(skb, aad);
1012 ieee80211_aes_cmac_256(key->u 1118 ieee80211_aes_cmac_256(key->u.aes_cmac.tfm, aad,
1013 skb->d 1119 skb->data + 24, skb->len - 24, mic);
1014 if (crypto_memneq(mic, mmie-> 1120 if (crypto_memneq(mic, mmie->mic, sizeof(mmie->mic))) {
1015 key->u.aes_cmac.icver 1121 key->u.aes_cmac.icverrors++;
1016 return RX_DROP_U_MIC_ !! 1122 return RX_DROP_UNUSABLE;
1017 } 1123 }
1018 } 1124 }
1019 1125
1020 memcpy(key->u.aes_cmac.rx_pn, ipn, 6) 1126 memcpy(key->u.aes_cmac.rx_pn, ipn, 6);
1021 1127
1022 /* Remove MMIE */ 1128 /* Remove MMIE */
1023 skb_trim(skb, skb->len - sizeof(*mmie 1129 skb_trim(skb, skb->len - sizeof(*mmie));
1024 1130
1025 return RX_CONTINUE; 1131 return RX_CONTINUE;
1026 } 1132 }
1027 1133
1028 ieee80211_tx_result 1134 ieee80211_tx_result
1029 ieee80211_crypto_aes_gmac_encrypt(struct ieee 1135 ieee80211_crypto_aes_gmac_encrypt(struct ieee80211_tx_data *tx)
1030 { 1136 {
1031 struct sk_buff *skb; 1137 struct sk_buff *skb;
1032 struct ieee80211_tx_info *info; 1138 struct ieee80211_tx_info *info;
1033 struct ieee80211_key *key = tx->key; 1139 struct ieee80211_key *key = tx->key;
1034 struct ieee80211_mmie_16 *mmie; 1140 struct ieee80211_mmie_16 *mmie;
1035 struct ieee80211_hdr *hdr; 1141 struct ieee80211_hdr *hdr;
1036 u8 aad[GMAC_AAD_LEN]; 1142 u8 aad[GMAC_AAD_LEN];
1037 u64 pn64; 1143 u64 pn64;
1038 u8 nonce[GMAC_NONCE_LEN]; 1144 u8 nonce[GMAC_NONCE_LEN];
1039 1145
1040 if (WARN_ON(skb_queue_len(&tx->skbs) 1146 if (WARN_ON(skb_queue_len(&tx->skbs) != 1))
1041 return TX_DROP; 1147 return TX_DROP;
1042 1148
1043 skb = skb_peek(&tx->skbs); 1149 skb = skb_peek(&tx->skbs);
1044 1150
1045 info = IEEE80211_SKB_CB(skb); 1151 info = IEEE80211_SKB_CB(skb);
1046 1152
1047 if (info->control.hw_key && !! 1153 if (info->control.hw_key)
1048 !(key->conf.flags & IEEE80211_KEY <<
1049 return TX_CONTINUE; 1154 return TX_CONTINUE;
1050 1155
1051 if (WARN_ON(skb_tailroom(skb) < sizeo 1156 if (WARN_ON(skb_tailroom(skb) < sizeof(*mmie)))
1052 return TX_DROP; 1157 return TX_DROP;
1053 1158
1054 mmie = skb_put(skb, sizeof(*mmie)); 1159 mmie = skb_put(skb, sizeof(*mmie));
1055 mmie->element_id = WLAN_EID_MMIE; 1160 mmie->element_id = WLAN_EID_MMIE;
1056 mmie->length = sizeof(*mmie) - 2; 1161 mmie->length = sizeof(*mmie) - 2;
1057 mmie->key_id = cpu_to_le16(key->conf. 1162 mmie->key_id = cpu_to_le16(key->conf.keyidx);
1058 1163
1059 /* PN = PN + 1 */ 1164 /* PN = PN + 1 */
1060 pn64 = atomic64_inc_return(&key->conf 1165 pn64 = atomic64_inc_return(&key->conf.tx_pn);
1061 1166
1062 bip_ipn_set64(mmie->sequence_number, 1167 bip_ipn_set64(mmie->sequence_number, pn64);
1063 1168
1064 if (info->control.hw_key) <<
1065 return TX_CONTINUE; <<
1066 <<
1067 bip_aad(skb, aad); 1169 bip_aad(skb, aad);
1068 1170
1069 hdr = (struct ieee80211_hdr *)skb->da 1171 hdr = (struct ieee80211_hdr *)skb->data;
1070 memcpy(nonce, hdr->addr2, ETH_ALEN); 1172 memcpy(nonce, hdr->addr2, ETH_ALEN);
1071 bip_ipn_swap(nonce + ETH_ALEN, mmie-> 1173 bip_ipn_swap(nonce + ETH_ALEN, mmie->sequence_number);
1072 1174
1073 /* MIC = AES-GMAC(IGTK, AAD || Manage 1175 /* MIC = AES-GMAC(IGTK, AAD || Management Frame Body || MMIE, 128) */
1074 if (ieee80211_aes_gmac(key->u.aes_gma 1176 if (ieee80211_aes_gmac(key->u.aes_gmac.tfm, aad, nonce,
1075 skb->data + 24 1177 skb->data + 24, skb->len - 24, mmie->mic) < 0)
1076 return TX_DROP; 1178 return TX_DROP;
1077 1179
1078 return TX_CONTINUE; 1180 return TX_CONTINUE;
1079 } 1181 }
1080 1182
1081 ieee80211_rx_result 1183 ieee80211_rx_result
1082 ieee80211_crypto_aes_gmac_decrypt(struct ieee 1184 ieee80211_crypto_aes_gmac_decrypt(struct ieee80211_rx_data *rx)
1083 { 1185 {
1084 struct sk_buff *skb = rx->skb; 1186 struct sk_buff *skb = rx->skb;
1085 struct ieee80211_rx_status *status = 1187 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
1086 struct ieee80211_key *key = rx->key; 1188 struct ieee80211_key *key = rx->key;
1087 struct ieee80211_mmie_16 *mmie; 1189 struct ieee80211_mmie_16 *mmie;
1088 u8 aad[GMAC_AAD_LEN], *mic, ipn[6], n 1190 u8 aad[GMAC_AAD_LEN], *mic, ipn[6], nonce[GMAC_NONCE_LEN];
1089 struct ieee80211_hdr *hdr = (struct i 1191 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
1090 1192
1091 if (!ieee80211_is_mgmt(hdr->frame_con 1193 if (!ieee80211_is_mgmt(hdr->frame_control))
1092 return RX_CONTINUE; 1194 return RX_CONTINUE;
1093 1195
1094 /* management frames are already line 1196 /* management frames are already linear */
1095 1197
1096 if (skb->len < 24 + sizeof(*mmie)) 1198 if (skb->len < 24 + sizeof(*mmie))
1097 return RX_DROP_U_SHORT_GMAC; !! 1199 return RX_DROP_UNUSABLE;
1098 1200
1099 mmie = (struct ieee80211_mmie_16 *) 1201 mmie = (struct ieee80211_mmie_16 *)
1100 (skb->data + skb->len - sizeo 1202 (skb->data + skb->len - sizeof(*mmie));
1101 if (mmie->element_id != WLAN_EID_MMIE 1203 if (mmie->element_id != WLAN_EID_MMIE ||
1102 mmie->length != sizeof(*mmie) - 2 1204 mmie->length != sizeof(*mmie) - 2)
1103 return RX_DROP_U_BAD_MMIE; /* !! 1205 return RX_DROP_UNUSABLE; /* Invalid MMIE */
1104 1206
1105 bip_ipn_swap(ipn, mmie->sequence_numb 1207 bip_ipn_swap(ipn, mmie->sequence_number);
1106 1208
1107 if (memcmp(ipn, key->u.aes_gmac.rx_pn 1209 if (memcmp(ipn, key->u.aes_gmac.rx_pn, 6) <= 0) {
1108 key->u.aes_gmac.replays++; 1210 key->u.aes_gmac.replays++;
1109 return RX_DROP_U_REPLAY; !! 1211 return RX_DROP_UNUSABLE;
1110 } 1212 }
1111 1213
1112 if (!(status->flag & RX_FLAG_DECRYPTE 1214 if (!(status->flag & RX_FLAG_DECRYPTED)) {
1113 /* hardware didn't decrypt/ve 1215 /* hardware didn't decrypt/verify MIC */
1114 bip_aad(skb, aad); 1216 bip_aad(skb, aad);
1115 1217
1116 memcpy(nonce, hdr->addr2, ETH 1218 memcpy(nonce, hdr->addr2, ETH_ALEN);
1117 memcpy(nonce + ETH_ALEN, ipn, 1219 memcpy(nonce + ETH_ALEN, ipn, 6);
1118 1220
1119 mic = kmalloc(GMAC_MIC_LEN, G 1221 mic = kmalloc(GMAC_MIC_LEN, GFP_ATOMIC);
1120 if (!mic) 1222 if (!mic)
1121 return RX_DROP_U_OOM; !! 1223 return RX_DROP_UNUSABLE;
1122 if (ieee80211_aes_gmac(key->u 1224 if (ieee80211_aes_gmac(key->u.aes_gmac.tfm, aad, nonce,
1123 skb->d 1225 skb->data + 24, skb->len - 24,
1124 mic) < 1226 mic) < 0 ||
1125 crypto_memneq(mic, mmie-> 1227 crypto_memneq(mic, mmie->mic, sizeof(mmie->mic))) {
1126 key->u.aes_gmac.icver 1228 key->u.aes_gmac.icverrors++;
1127 kfree(mic); 1229 kfree(mic);
1128 return RX_DROP_U_MIC_ !! 1230 return RX_DROP_UNUSABLE;
1129 } 1231 }
1130 kfree(mic); 1232 kfree(mic);
1131 } 1233 }
1132 1234
1133 memcpy(key->u.aes_gmac.rx_pn, ipn, 6) 1235 memcpy(key->u.aes_gmac.rx_pn, ipn, 6);
1134 1236
1135 /* Remove MMIE */ 1237 /* Remove MMIE */
1136 skb_trim(skb, skb->len - sizeof(*mmie 1238 skb_trim(skb, skb->len - sizeof(*mmie));
1137 1239
1138 return RX_CONTINUE; 1240 return RX_CONTINUE;
>> 1241 }
>> 1242
>> 1243 ieee80211_tx_result
>> 1244 ieee80211_crypto_hw_encrypt(struct ieee80211_tx_data *tx)
>> 1245 {
>> 1246 struct sk_buff *skb;
>> 1247 struct ieee80211_tx_info *info = NULL;
>> 1248 ieee80211_tx_result res;
>> 1249
>> 1250 skb_queue_walk(&tx->skbs, skb) {
>> 1251 info = IEEE80211_SKB_CB(skb);
>> 1252
>> 1253 /* handle hw-only algorithm */
>> 1254 if (!info->control.hw_key)
>> 1255 return TX_DROP;
>> 1256
>> 1257 if (tx->key->flags & KEY_FLAG_CIPHER_SCHEME) {
>> 1258 res = ieee80211_crypto_cs_encrypt(tx, skb);
>> 1259 if (res != TX_CONTINUE)
>> 1260 return res;
>> 1261 }
>> 1262 }
>> 1263
>> 1264 ieee80211_tx_set_protected(tx);
>> 1265
>> 1266 return TX_CONTINUE;
>> 1267 }
>> 1268
>> 1269 ieee80211_rx_result
>> 1270 ieee80211_crypto_hw_decrypt(struct ieee80211_rx_data *rx)
>> 1271 {
>> 1272 if (rx->sta && rx->sta->cipher_scheme)
>> 1273 return ieee80211_crypto_cs_decrypt(rx);
>> 1274
>> 1275 return RX_DROP_UNUSABLE;
1139 } 1276 }
1140 1277
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.