1 // SPDX-License-Identifier: GPL-2.0-only <<
2 /* 1 /*
3 * Copyright 2002-2004, Instant802 Networks, I 2 * Copyright 2002-2004, Instant802 Networks, Inc.
4 * Copyright 2008, Jouni Malinen <j@w1.fi> 3 * Copyright 2008, Jouni Malinen <j@w1.fi>
5 * Copyright (C) 2016-2017 Intel Deutschland G !! 4 * Copyright (C) 2016 Intel Deutschland GmbH
6 * Copyright (C) 2020-2023 Intel Corporation !! 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.
7 */ 9 */
8 10
9 #include <linux/netdevice.h> 11 #include <linux/netdevice.h>
10 #include <linux/types.h> 12 #include <linux/types.h>
11 #include <linux/skbuff.h> 13 #include <linux/skbuff.h>
12 #include <linux/compiler.h> 14 #include <linux/compiler.h>
13 #include <linux/ieee80211.h> 15 #include <linux/ieee80211.h>
14 #include <linux/gfp.h> 16 #include <linux/gfp.h>
15 #include <linux/unaligned.h> !! 17 #include <asm/unaligned.h>
16 #include <net/mac80211.h> 18 #include <net/mac80211.h>
17 #include <crypto/aes.h> 19 #include <crypto/aes.h>
18 #include <crypto/utils.h> <<
19 20
20 #include "ieee80211_i.h" 21 #include "ieee80211_i.h"
21 #include "michael.h" 22 #include "michael.h"
22 #include "tkip.h" 23 #include "tkip.h"
23 #include "aes_ccm.h" 24 #include "aes_ccm.h"
24 #include "aes_cmac.h" 25 #include "aes_cmac.h"
25 #include "aes_gmac.h" 26 #include "aes_gmac.h"
26 #include "aes_gcm.h" 27 #include "aes_gcm.h"
27 #include "wpa.h" 28 #include "wpa.h"
28 29
29 ieee80211_tx_result 30 ieee80211_tx_result
30 ieee80211_tx_h_michael_mic_add(struct ieee8021 31 ieee80211_tx_h_michael_mic_add(struct ieee80211_tx_data *tx)
31 { 32 {
32 u8 *data, *key, *mic; 33 u8 *data, *key, *mic;
33 size_t data_len; 34 size_t data_len;
34 unsigned int hdrlen; 35 unsigned int hdrlen;
35 struct ieee80211_hdr *hdr; 36 struct ieee80211_hdr *hdr;
36 struct sk_buff *skb = tx->skb; 37 struct sk_buff *skb = tx->skb;
37 struct ieee80211_tx_info *info = IEEE8 38 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
38 int tail; 39 int tail;
39 40
40 hdr = (struct ieee80211_hdr *)skb->dat 41 hdr = (struct ieee80211_hdr *)skb->data;
41 if (!tx->key || tx->key->conf.cipher ! 42 if (!tx->key || tx->key->conf.cipher != WLAN_CIPHER_SUITE_TKIP ||
42 skb->len < 24 || !ieee80211_is_dat 43 skb->len < 24 || !ieee80211_is_data_present(hdr->frame_control))
43 return TX_CONTINUE; 44 return TX_CONTINUE;
44 45
45 hdrlen = ieee80211_hdrlen(hdr->frame_c 46 hdrlen = ieee80211_hdrlen(hdr->frame_control);
46 if (skb->len < hdrlen) 47 if (skb->len < hdrlen)
47 return TX_DROP; 48 return TX_DROP;
48 49
49 data = skb->data + hdrlen; 50 data = skb->data + hdrlen;
50 data_len = skb->len - hdrlen; 51 data_len = skb->len - hdrlen;
51 52
52 if (unlikely(info->flags & IEEE80211_T 53 if (unlikely(info->flags & IEEE80211_TX_INTFL_TKIP_MIC_FAILURE)) {
53 /* Need to use software crypto 54 /* Need to use software crypto for the test */
54 info->control.hw_key = NULL; 55 info->control.hw_key = NULL;
55 } 56 }
56 57
57 if (info->control.hw_key && 58 if (info->control.hw_key &&
58 (info->flags & IEEE80211_TX_CTL_DO 59 (info->flags & IEEE80211_TX_CTL_DONTFRAG ||
59 ieee80211_hw_check(&tx->local->hw 60 ieee80211_hw_check(&tx->local->hw, SUPPORTS_TX_FRAG)) &&
60 !(tx->key->conf.flags & (IEEE80211 !! 61 !(tx->key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_MMIC)) {
61 IEEE80211 !! 62 /* hwaccel - with no need for SW-generated MMIC */
62 /* hwaccel - with no need for <<
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); <<
78 <<
79 if (tx->key->conf.flags & IEEE80211_KE <<
80 /* Zeroed MIC can help with de <<
81 memset(mic, 0, MICHAEL_MIC_LEN <<
82 return TX_CONTINUE; <<
83 } <<
84 <<
85 key = &tx->key->conf.key[NL80211_TKIP_ 77 key = &tx->key->conf.key[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY];
>> 78 mic = skb_put(skb, MICHAEL_MIC_LEN);
86 michael_mic(key, hdr, data, data_len, 79 michael_mic(key, hdr, data, data_len, mic);
87 if (unlikely(info->flags & IEEE80211_T 80 if (unlikely(info->flags & IEEE80211_TX_INTFL_TKIP_MIC_FAILURE))
88 mic[0]++; 81 mic[0]++;
89 82
90 return TX_CONTINUE; 83 return TX_CONTINUE;
91 } 84 }
92 85
93 86
94 ieee80211_rx_result 87 ieee80211_rx_result
95 ieee80211_rx_h_michael_mic_verify(struct ieee8 88 ieee80211_rx_h_michael_mic_verify(struct ieee80211_rx_data *rx)
96 { 89 {
97 u8 *data, *key = NULL; 90 u8 *data, *key = NULL;
98 size_t data_len; 91 size_t data_len;
99 unsigned int hdrlen; 92 unsigned int hdrlen;
100 u8 mic[MICHAEL_MIC_LEN]; 93 u8 mic[MICHAEL_MIC_LEN];
101 struct sk_buff *skb = rx->skb; 94 struct sk_buff *skb = rx->skb;
102 struct ieee80211_rx_status *status = I 95 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
103 struct ieee80211_hdr *hdr = (struct ie 96 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
104 97
105 /* 98 /*
106 * it makes no sense to check for MIC 99 * it makes no sense to check for MIC errors on anything other
107 * than data frames. 100 * than data frames.
108 */ 101 */
109 if (!ieee80211_is_data_present(hdr->fr 102 if (!ieee80211_is_data_present(hdr->frame_control))
110 return RX_CONTINUE; 103 return RX_CONTINUE;
111 104
112 /* 105 /*
113 * No way to verify the MIC if the har 106 * No way to verify the MIC if the hardware stripped it or
114 * the IV with the key index. In this 107 * the IV with the key index. In this case we have solely rely
115 * on the driver to set RX_FLAG_MMIC_E 108 * on the driver to set RX_FLAG_MMIC_ERROR in the event of a
116 * MIC failure report. 109 * MIC failure report.
117 */ 110 */
118 if (status->flag & (RX_FLAG_MMIC_STRIP 111 if (status->flag & (RX_FLAG_MMIC_STRIPPED | RX_FLAG_IV_STRIPPED)) {
119 if (status->flag & RX_FLAG_MMI 112 if (status->flag & RX_FLAG_MMIC_ERROR)
120 goto mic_fail_no_key; 113 goto mic_fail_no_key;
121 114
122 if (!(status->flag & RX_FLAG_I 115 if (!(status->flag & RX_FLAG_IV_STRIPPED) && rx->key &&
123 rx->key->conf.cipher == WL 116 rx->key->conf.cipher == WLAN_CIPHER_SUITE_TKIP)
124 goto update_iv; 117 goto update_iv;
125 118
126 return RX_CONTINUE; 119 return RX_CONTINUE;
127 } 120 }
128 121
129 /* 122 /*
130 * Some hardware seems to generate Mic 123 * Some hardware seems to generate Michael MIC failure reports; even
131 * though, the frame was not encrypted 124 * though, the frame was not encrypted with TKIP and therefore has no
132 * MIC. Ignore the flag them to avoid 125 * MIC. Ignore the flag them to avoid triggering countermeasures.
133 */ 126 */
134 if (!rx->key || rx->key->conf.cipher ! 127 if (!rx->key || rx->key->conf.cipher != WLAN_CIPHER_SUITE_TKIP ||
135 !(status->flag & RX_FLAG_DECRYPTED 128 !(status->flag & RX_FLAG_DECRYPTED))
136 return RX_CONTINUE; 129 return RX_CONTINUE;
137 130
138 if (rx->sdata->vif.type == NL80211_IFT 131 if (rx->sdata->vif.type == NL80211_IFTYPE_AP && rx->key->conf.keyidx) {
139 /* 132 /*
140 * APs with pairwise keys shou 133 * APs with pairwise keys should never receive Michael MIC
141 * errors for non-zero keyidx 134 * errors for non-zero keyidx because these are reserved for
142 * group keys and only the AP 135 * group keys and only the AP is sending real multicast
143 * frames in the BSS. 136 * frames in the BSS.
144 */ 137 */
145 return RX_DROP_U_AP_RX_GROUPCA !! 138 return RX_DROP_UNUSABLE;
146 } 139 }
147 140
148 if (status->flag & RX_FLAG_MMIC_ERROR) 141 if (status->flag & RX_FLAG_MMIC_ERROR)
149 goto mic_fail; 142 goto mic_fail;
150 143
151 hdrlen = ieee80211_hdrlen(hdr->frame_c 144 hdrlen = ieee80211_hdrlen(hdr->frame_control);
152 if (skb->len < hdrlen + MICHAEL_MIC_LE 145 if (skb->len < hdrlen + MICHAEL_MIC_LEN)
153 return RX_DROP_U_SHORT_MMIC; !! 146 return RX_DROP_UNUSABLE;
154 147
155 if (skb_linearize(rx->skb)) 148 if (skb_linearize(rx->skb))
156 return RX_DROP_U_OOM; !! 149 return RX_DROP_UNUSABLE;
157 hdr = (void *)skb->data; 150 hdr = (void *)skb->data;
158 151
159 data = skb->data + hdrlen; 152 data = skb->data + hdrlen;
160 data_len = skb->len - hdrlen - MICHAEL 153 data_len = skb->len - hdrlen - MICHAEL_MIC_LEN;
161 key = &rx->key->conf.key[NL80211_TKIP_ 154 key = &rx->key->conf.key[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY];
162 michael_mic(key, hdr, data, data_len, 155 michael_mic(key, hdr, data, data_len, mic);
163 if (crypto_memneq(mic, data + data_len !! 156 if (memcmp(mic, data + data_len, MICHAEL_MIC_LEN) != 0)
164 goto mic_fail; 157 goto mic_fail;
165 158
166 /* remove Michael MIC from payload */ 159 /* remove Michael MIC from payload */
167 skb_trim(skb, skb->len - MICHAEL_MIC_L 160 skb_trim(skb, skb->len - MICHAEL_MIC_LEN);
168 161
169 update_iv: 162 update_iv:
170 /* update IV in key information to be 163 /* update IV in key information to be able to detect replays */
171 rx->key->u.tkip.rx[rx->security_idx].i !! 164 rx->key->u.tkip.rx[rx->security_idx].iv32 = rx->tkip_iv32;
172 rx->key->u.tkip.rx[rx->security_idx].i !! 165 rx->key->u.tkip.rx[rx->security_idx].iv16 = rx->tkip_iv16;
173 166
174 return RX_CONTINUE; 167 return RX_CONTINUE;
175 168
176 mic_fail: 169 mic_fail:
177 rx->key->u.tkip.mic_failures++; 170 rx->key->u.tkip.mic_failures++;
178 171
179 mic_fail_no_key: 172 mic_fail_no_key:
180 /* 173 /*
181 * In some cases the key can be unset 174 * In some cases the key can be unset - e.g. a multicast packet, in
182 * a driver that supports HW encryptio 175 * a driver that supports HW encryption. Send up the key idx only if
183 * the key is set. 176 * the key is set.
184 */ 177 */
185 cfg80211_michael_mic_failure(rx->sdata 178 cfg80211_michael_mic_failure(rx->sdata->dev, hdr->addr2,
186 is_multic 179 is_multicast_ether_addr(hdr->addr1) ?
187 NL80211_K 180 NL80211_KEYTYPE_GROUP :
188 NL80211_K 181 NL80211_KEYTYPE_PAIRWISE,
189 rx->key ? 182 rx->key ? rx->key->conf.keyidx : -1,
190 NULL, GFP 183 NULL, GFP_ATOMIC);
191 return RX_DROP_U_MMIC_FAIL; !! 184 return RX_DROP_UNUSABLE;
192 } 185 }
193 186
194 static int tkip_encrypt_skb(struct ieee80211_t 187 static int tkip_encrypt_skb(struct ieee80211_tx_data *tx, struct sk_buff *skb)
195 { 188 {
196 struct ieee80211_hdr *hdr = (struct ie 189 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
197 struct ieee80211_key *key = tx->key; 190 struct ieee80211_key *key = tx->key;
198 struct ieee80211_tx_info *info = IEEE8 191 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
199 unsigned int hdrlen; 192 unsigned int hdrlen;
200 int len, tail; 193 int len, tail;
201 u64 pn; 194 u64 pn;
202 u8 *pos; 195 u8 *pos;
203 196
204 if (info->control.hw_key && 197 if (info->control.hw_key &&
205 !(info->control.hw_key->flags & IE 198 !(info->control.hw_key->flags & IEEE80211_KEY_FLAG_GENERATE_IV) &&
206 !(info->control.hw_key->flags & IE 199 !(info->control.hw_key->flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE)) {
207 /* hwaccel - with no need for 200 /* hwaccel - with no need for software-generated IV */
208 return 0; 201 return 0;
209 } 202 }
210 203
211 hdrlen = ieee80211_hdrlen(hdr->frame_c 204 hdrlen = ieee80211_hdrlen(hdr->frame_control);
212 len = skb->len - hdrlen; 205 len = skb->len - hdrlen;
213 206
214 if (info->control.hw_key) 207 if (info->control.hw_key)
215 tail = 0; 208 tail = 0;
216 else 209 else
217 tail = IEEE80211_TKIP_ICV_LEN; 210 tail = IEEE80211_TKIP_ICV_LEN;
218 211
219 if (WARN_ON(skb_tailroom(skb) < tail | 212 if (WARN_ON(skb_tailroom(skb) < tail ||
220 skb_headroom(skb) < IEEE80 213 skb_headroom(skb) < IEEE80211_TKIP_IV_LEN))
221 return -1; 214 return -1;
222 215
223 pos = skb_push(skb, IEEE80211_TKIP_IV_ 216 pos = skb_push(skb, IEEE80211_TKIP_IV_LEN);
224 memmove(pos, pos + IEEE80211_TKIP_IV_L 217 memmove(pos, pos + IEEE80211_TKIP_IV_LEN, hdrlen);
225 pos += hdrlen; 218 pos += hdrlen;
226 219
227 /* the HW only needs room for the IV, 220 /* the HW only needs room for the IV, but not the actual IV */
228 if (info->control.hw_key && 221 if (info->control.hw_key &&
229 (info->control.hw_key->flags & IEE 222 (info->control.hw_key->flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE))
230 return 0; 223 return 0;
231 224
232 /* Increase IV for the frame */ 225 /* Increase IV for the frame */
233 pn = atomic64_inc_return(&key->conf.tx 226 pn = atomic64_inc_return(&key->conf.tx_pn);
234 pos = ieee80211_tkip_add_iv(pos, &key- 227 pos = ieee80211_tkip_add_iv(pos, &key->conf, pn);
235 228
236 /* hwaccel - with software IV */ 229 /* hwaccel - with software IV */
237 if (info->control.hw_key) 230 if (info->control.hw_key)
238 return 0; 231 return 0;
239 232
240 /* Add room for ICV */ 233 /* Add room for ICV */
241 skb_put(skb, IEEE80211_TKIP_ICV_LEN); 234 skb_put(skb, IEEE80211_TKIP_ICV_LEN);
242 235
243 return ieee80211_tkip_encrypt_data(&tx !! 236 return ieee80211_tkip_encrypt_data(tx->local->wep_tx_tfm,
244 key 237 key, skb, pos, len);
245 } 238 }
246 239
247 240
248 ieee80211_tx_result 241 ieee80211_tx_result
249 ieee80211_crypto_tkip_encrypt(struct ieee80211 242 ieee80211_crypto_tkip_encrypt(struct ieee80211_tx_data *tx)
250 { 243 {
251 struct sk_buff *skb; 244 struct sk_buff *skb;
252 245
253 ieee80211_tx_set_protected(tx); 246 ieee80211_tx_set_protected(tx);
254 247
255 skb_queue_walk(&tx->skbs, skb) { 248 skb_queue_walk(&tx->skbs, skb) {
256 if (tkip_encrypt_skb(tx, skb) 249 if (tkip_encrypt_skb(tx, skb) < 0)
257 return TX_DROP; 250 return TX_DROP;
258 } 251 }
259 252
260 return TX_CONTINUE; 253 return TX_CONTINUE;
261 } 254 }
262 255
263 256
264 ieee80211_rx_result 257 ieee80211_rx_result
265 ieee80211_crypto_tkip_decrypt(struct ieee80211 258 ieee80211_crypto_tkip_decrypt(struct ieee80211_rx_data *rx)
266 { 259 {
267 struct ieee80211_hdr *hdr = (struct ie 260 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) rx->skb->data;
268 int hdrlen, res, hwaccel = 0; 261 int hdrlen, res, hwaccel = 0;
269 struct ieee80211_key *key = rx->key; 262 struct ieee80211_key *key = rx->key;
270 struct sk_buff *skb = rx->skb; 263 struct sk_buff *skb = rx->skb;
271 struct ieee80211_rx_status *status = I 264 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
272 265
273 hdrlen = ieee80211_hdrlen(hdr->frame_c 266 hdrlen = ieee80211_hdrlen(hdr->frame_control);
274 267
275 if (!ieee80211_is_data(hdr->frame_cont 268 if (!ieee80211_is_data(hdr->frame_control))
276 return RX_CONTINUE; 269 return RX_CONTINUE;
277 270
278 if (!rx->sta || skb->len - hdrlen < 12 271 if (!rx->sta || skb->len - hdrlen < 12)
279 return RX_DROP_U_SHORT_TKIP; !! 272 return RX_DROP_UNUSABLE;
280 273
281 /* it may be possible to optimize this 274 /* it may be possible to optimize this a bit more */
282 if (skb_linearize(rx->skb)) 275 if (skb_linearize(rx->skb))
283 return RX_DROP_U_OOM; !! 276 return RX_DROP_UNUSABLE;
284 hdr = (void *)skb->data; 277 hdr = (void *)skb->data;
285 278
286 /* 279 /*
287 * Let TKIP code verify IV, but skip d 280 * Let TKIP code verify IV, but skip decryption.
288 * In the case where hardware checks t 281 * In the case where hardware checks the IV as well,
289 * we don't even get here, see ieee802 282 * we don't even get here, see ieee80211_rx_h_decrypt()
290 */ 283 */
291 if (status->flag & RX_FLAG_DECRYPTED) 284 if (status->flag & RX_FLAG_DECRYPTED)
292 hwaccel = 1; 285 hwaccel = 1;
293 286
294 res = ieee80211_tkip_decrypt_data(&rx- !! 287 res = ieee80211_tkip_decrypt_data(rx->local->wep_rx_tfm,
295 key, 288 key, skb->data + hdrlen,
296 skb- 289 skb->len - hdrlen, rx->sta->sta.addr,
297 hdr- 290 hdr->addr1, hwaccel, rx->security_idx,
298 &rx- !! 291 &rx->tkip_iv32,
299 &rx- !! 292 &rx->tkip_iv16);
300 if (res != TKIP_DECRYPT_OK) 293 if (res != TKIP_DECRYPT_OK)
301 return RX_DROP_U_TKIP_FAIL; !! 294 return RX_DROP_UNUSABLE;
302 295
303 /* Trim ICV */ 296 /* Trim ICV */
304 if (!(status->flag & RX_FLAG_ICV_STRIP !! 297 skb_trim(skb, skb->len - IEEE80211_TKIP_ICV_LEN);
305 skb_trim(skb, skb->len - IEEE8 <<
306 298
307 /* Remove IV */ 299 /* Remove IV */
308 memmove(skb->data + IEEE80211_TKIP_IV_ 300 memmove(skb->data + IEEE80211_TKIP_IV_LEN, skb->data, hdrlen);
309 skb_pull(skb, IEEE80211_TKIP_IV_LEN); 301 skb_pull(skb, IEEE80211_TKIP_IV_LEN);
310 302
311 return RX_CONTINUE; 303 return RX_CONTINUE;
312 } 304 }
313 305
314 /* !! 306
315 * Calculate AAD for CCMP/GCMP, returning qos_ !! 307 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 { 308 {
320 struct ieee80211_hdr *hdr = (void *)sk <<
321 __le16 mask_fc; 309 __le16 mask_fc;
322 int a4_included, mgmt; 310 int a4_included, mgmt;
323 u8 qos_tid; 311 u8 qos_tid;
324 u16 len_a = 22; !! 312 u16 len_a;
>> 313 unsigned int hdrlen;
>> 314 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
325 315
326 /* 316 /*
327 * Mask FC: zero subtype b4 b5 b6 (if 317 * Mask FC: zero subtype b4 b5 b6 (if not mgmt)
328 * Retry, PwrMgt, MoreData, Order (if !! 318 * Retry, PwrMgt, MoreData; set Protected
329 */ 319 */
330 mgmt = ieee80211_is_mgmt(hdr->frame_co 320 mgmt = ieee80211_is_mgmt(hdr->frame_control);
331 mask_fc = hdr->frame_control; 321 mask_fc = hdr->frame_control;
332 mask_fc &= ~cpu_to_le16(IEEE80211_FCTL 322 mask_fc &= ~cpu_to_le16(IEEE80211_FCTL_RETRY |
333 IEEE80211_FCTL 323 IEEE80211_FCTL_PM | IEEE80211_FCTL_MOREDATA);
334 if (!mgmt) 324 if (!mgmt)
335 mask_fc &= ~cpu_to_le16(0x0070 325 mask_fc &= ~cpu_to_le16(0x0070);
336 mask_fc |= cpu_to_le16(IEEE80211_FCTL_ 326 mask_fc |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
337 327
>> 328 hdrlen = ieee80211_hdrlen(hdr->frame_control);
>> 329 len_a = hdrlen - 2;
338 a4_included = ieee80211_has_a4(hdr->fr 330 a4_included = ieee80211_has_a4(hdr->frame_control);
339 if (a4_included) <<
340 len_a += 6; <<
341 331
342 if (ieee80211_is_data_qos(hdr->frame_c !! 332 if (ieee80211_is_data_qos(hdr->frame_control))
343 qos_tid = *ieee80211_get_qos_c !! 333 qos_tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK;
>> 334 else
>> 335 qos_tid = 0;
344 336
345 if (spp_amsdu) !! 337 /* In CCM, the initial vectors (IV) used for CTR mode encryption and CBC
346 qos_tid &= IEEE80211_Q !! 338 * mode authentication are not allowed to collide, yet both are derived
347 IEEE80211_Q !! 339 * from this vector b_0. We only set L := 1 here to indicate that the
348 else !! 340 * data size can be represented in (L+1) bytes. The CCM layer will take
349 qos_tid &= IEEE80211_Q !! 341 * care of storing the data length in the top (L+1) bytes and setting
>> 342 * and clearing the other bits as is required to derive the two IVs.
>> 343 */
>> 344 b_0[0] = 0x1;
350 345
351 mask_fc &= ~cpu_to_le16(IEEE80 !! 346 /* Nonce: Nonce Flags | A2 | PN
352 len_a += 2; !! 347 * Nonce Flags: Priority (b0..b3) | Management (b4) | Reserved (b5..b7)
353 } else { !! 348 */
354 qos_tid = 0; !! 349 b_0[1] = qos_tid | (mgmt << 4);
355 } !! 350 memcpy(&b_0[2], hdr->addr2, ETH_ALEN);
>> 351 memcpy(&b_0[8], pn, IEEE80211_CCMP_PN_LEN);
356 352
357 /* AAD (extra authenticate-only data) 353 /* AAD (extra authenticate-only data) / masked 802.11 header
358 * FC | A1 | A2 | A3 | SC | [A4] | [QC 354 * FC | A1 | A2 | A3 | SC | [A4] | [QC] */
359 put_unaligned_be16(len_a, &aad[0]); 355 put_unaligned_be16(len_a, &aad[0]);
360 put_unaligned(mask_fc, (__le16 *)&aad[ 356 put_unaligned(mask_fc, (__le16 *)&aad[2]);
361 memcpy(&aad[4], &hdr->addrs, 3 * ETH_A !! 357 memcpy(&aad[4], &hdr->addr1, 3 * ETH_ALEN);
362 358
363 /* Mask Seq#, leave Frag# */ 359 /* Mask Seq#, leave Frag# */
364 aad[22] = *((u8 *) &hdr->seq_ctrl) & 0 360 aad[22] = *((u8 *) &hdr->seq_ctrl) & 0x0f;
365 aad[23] = 0; 361 aad[23] = 0;
366 362
367 if (a4_included) { 363 if (a4_included) {
368 memcpy(&aad[24], hdr->addr4, E 364 memcpy(&aad[24], hdr->addr4, ETH_ALEN);
369 aad[30] = qos_tid; 365 aad[30] = qos_tid;
370 aad[31] = 0; 366 aad[31] = 0;
371 } else { 367 } else {
372 memset(&aad[24], 0, ETH_ALEN + 368 memset(&aad[24], 0, ETH_ALEN + IEEE80211_QOS_CTL_LEN);
373 aad[24] = qos_tid; 369 aad[24] = qos_tid;
374 } 370 }
375 <<
376 return qos_tid; <<
377 } 371 }
378 372
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 } <<
401 373
402 static inline void ccmp_pn2hdr(u8 *hdr, u8 *pn 374 static inline void ccmp_pn2hdr(u8 *hdr, u8 *pn, int key_id)
403 { 375 {
404 hdr[0] = pn[5]; 376 hdr[0] = pn[5];
405 hdr[1] = pn[4]; 377 hdr[1] = pn[4];
406 hdr[2] = 0; 378 hdr[2] = 0;
407 hdr[3] = 0x20 | (key_id << 6); 379 hdr[3] = 0x20 | (key_id << 6);
408 hdr[4] = pn[3]; 380 hdr[4] = pn[3];
409 hdr[5] = pn[2]; 381 hdr[5] = pn[2];
410 hdr[6] = pn[1]; 382 hdr[6] = pn[1];
411 hdr[7] = pn[0]; 383 hdr[7] = pn[0];
412 } 384 }
413 385
414 386
415 static inline void ccmp_hdr2pn(u8 *pn, u8 *hdr 387 static inline void ccmp_hdr2pn(u8 *pn, u8 *hdr)
416 { 388 {
417 pn[0] = hdr[7]; 389 pn[0] = hdr[7];
418 pn[1] = hdr[6]; 390 pn[1] = hdr[6];
419 pn[2] = hdr[5]; 391 pn[2] = hdr[5];
420 pn[3] = hdr[4]; 392 pn[3] = hdr[4];
421 pn[4] = hdr[1]; 393 pn[4] = hdr[1];
422 pn[5] = hdr[0]; 394 pn[5] = hdr[0];
423 } 395 }
424 396
425 397
426 static int ccmp_encrypt_skb(struct ieee80211_t 398 static int ccmp_encrypt_skb(struct ieee80211_tx_data *tx, struct sk_buff *skb,
427 unsigned int mic_l 399 unsigned int mic_len)
428 { 400 {
429 struct ieee80211_hdr *hdr = (struct ie 401 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
430 struct ieee80211_key *key = tx->key; 402 struct ieee80211_key *key = tx->key;
431 struct ieee80211_tx_info *info = IEEE8 403 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
432 int hdrlen, len, tail; 404 int hdrlen, len, tail;
433 u8 *pos; 405 u8 *pos;
434 u8 pn[6]; 406 u8 pn[6];
435 u64 pn64; 407 u64 pn64;
436 u8 aad[CCM_AAD_LEN]; 408 u8 aad[CCM_AAD_LEN];
437 u8 b_0[AES_BLOCK_SIZE]; 409 u8 b_0[AES_BLOCK_SIZE];
438 410
439 if (info->control.hw_key && 411 if (info->control.hw_key &&
440 !(info->control.hw_key->flags & IE 412 !(info->control.hw_key->flags & IEEE80211_KEY_FLAG_GENERATE_IV) &&
441 !(info->control.hw_key->flags & IE 413 !(info->control.hw_key->flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE) &&
442 !((info->control.hw_key->flags & 414 !((info->control.hw_key->flags &
443 IEEE80211_KEY_FLAG_GENERATE_IV_ 415 IEEE80211_KEY_FLAG_GENERATE_IV_MGMT) &&
444 ieee80211_is_mgmt(hdr->frame_con 416 ieee80211_is_mgmt(hdr->frame_control))) {
445 /* 417 /*
446 * hwaccel has no need for pre 418 * hwaccel has no need for preallocated room for CCMP
447 * header or MIC fields 419 * header or MIC fields
448 */ 420 */
449 return 0; 421 return 0;
450 } 422 }
451 423
452 hdrlen = ieee80211_hdrlen(hdr->frame_c 424 hdrlen = ieee80211_hdrlen(hdr->frame_control);
453 len = skb->len - hdrlen; 425 len = skb->len - hdrlen;
454 426
455 if (info->control.hw_key) 427 if (info->control.hw_key)
456 tail = 0; 428 tail = 0;
457 else 429 else
458 tail = mic_len; 430 tail = mic_len;
459 431
460 if (WARN_ON(skb_tailroom(skb) < tail | 432 if (WARN_ON(skb_tailroom(skb) < tail ||
461 skb_headroom(skb) < IEEE80 433 skb_headroom(skb) < IEEE80211_CCMP_HDR_LEN))
462 return -1; 434 return -1;
463 435
464 pos = skb_push(skb, IEEE80211_CCMP_HDR 436 pos = skb_push(skb, IEEE80211_CCMP_HDR_LEN);
465 memmove(pos, pos + IEEE80211_CCMP_HDR_ 437 memmove(pos, pos + IEEE80211_CCMP_HDR_LEN, hdrlen);
466 438
467 /* the HW only needs room for the IV, 439 /* the HW only needs room for the IV, but not the actual IV */
468 if (info->control.hw_key && 440 if (info->control.hw_key &&
469 (info->control.hw_key->flags & IEE 441 (info->control.hw_key->flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE))
470 return 0; 442 return 0;
471 443
>> 444 hdr = (struct ieee80211_hdr *) pos;
472 pos += hdrlen; 445 pos += hdrlen;
473 446
474 pn64 = atomic64_inc_return(&key->conf. 447 pn64 = atomic64_inc_return(&key->conf.tx_pn);
475 448
476 pn[5] = pn64; 449 pn[5] = pn64;
477 pn[4] = pn64 >> 8; 450 pn[4] = pn64 >> 8;
478 pn[3] = pn64 >> 16; 451 pn[3] = pn64 >> 16;
479 pn[2] = pn64 >> 24; 452 pn[2] = pn64 >> 24;
480 pn[1] = pn64 >> 32; 453 pn[1] = pn64 >> 32;
481 pn[0] = pn64 >> 40; 454 pn[0] = pn64 >> 40;
482 455
483 ccmp_pn2hdr(pos, pn, key->conf.keyidx) 456 ccmp_pn2hdr(pos, pn, key->conf.keyidx);
484 457
485 /* hwaccel - with software CCMP header 458 /* hwaccel - with software CCMP header */
486 if (info->control.hw_key) 459 if (info->control.hw_key)
487 return 0; 460 return 0;
488 461
489 pos += IEEE80211_CCMP_HDR_LEN; 462 pos += IEEE80211_CCMP_HDR_LEN;
490 ccmp_special_blocks(skb, pn, b_0, aad, !! 463 ccmp_special_blocks(skb, pn, b_0, aad);
491 key->conf.flags & <<
492 return ieee80211_aes_ccm_encrypt(key-> 464 return ieee80211_aes_ccm_encrypt(key->u.ccmp.tfm, b_0, aad, pos, len,
493 skb_p !! 465 skb_put(skb, mic_len), mic_len);
494 } 466 }
495 467
496 468
497 ieee80211_tx_result 469 ieee80211_tx_result
498 ieee80211_crypto_ccmp_encrypt(struct ieee80211 470 ieee80211_crypto_ccmp_encrypt(struct ieee80211_tx_data *tx,
499 unsigned int mic 471 unsigned int mic_len)
500 { 472 {
501 struct sk_buff *skb; 473 struct sk_buff *skb;
502 474
503 ieee80211_tx_set_protected(tx); 475 ieee80211_tx_set_protected(tx);
504 476
505 skb_queue_walk(&tx->skbs, skb) { 477 skb_queue_walk(&tx->skbs, skb) {
506 if (ccmp_encrypt_skb(tx, skb, 478 if (ccmp_encrypt_skb(tx, skb, mic_len) < 0)
507 return TX_DROP; 479 return TX_DROP;
508 } 480 }
509 481
510 return TX_CONTINUE; 482 return TX_CONTINUE;
511 } 483 }
512 484
513 485
514 ieee80211_rx_result 486 ieee80211_rx_result
515 ieee80211_crypto_ccmp_decrypt(struct ieee80211 487 ieee80211_crypto_ccmp_decrypt(struct ieee80211_rx_data *rx,
516 unsigned int mic 488 unsigned int mic_len)
517 { 489 {
518 struct ieee80211_hdr *hdr = (struct ie 490 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data;
519 int hdrlen; 491 int hdrlen;
520 struct ieee80211_key *key = rx->key; 492 struct ieee80211_key *key = rx->key;
521 struct sk_buff *skb = rx->skb; 493 struct sk_buff *skb = rx->skb;
522 struct ieee80211_rx_status *status = I 494 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
523 u8 pn[IEEE80211_CCMP_PN_LEN]; 495 u8 pn[IEEE80211_CCMP_PN_LEN];
524 int data_len; 496 int data_len;
525 int queue; 497 int queue;
526 498
527 hdrlen = ieee80211_hdrlen(hdr->frame_c 499 hdrlen = ieee80211_hdrlen(hdr->frame_control);
528 500
529 if (!ieee80211_is_data(hdr->frame_cont 501 if (!ieee80211_is_data(hdr->frame_control) &&
530 !ieee80211_is_robust_mgmt_frame(sk 502 !ieee80211_is_robust_mgmt_frame(skb))
531 return RX_CONTINUE; 503 return RX_CONTINUE;
532 504
533 if (status->flag & RX_FLAG_DECRYPTED) 505 if (status->flag & RX_FLAG_DECRYPTED) {
534 if (!pskb_may_pull(rx->skb, hd 506 if (!pskb_may_pull(rx->skb, hdrlen + IEEE80211_CCMP_HDR_LEN))
535 return RX_DROP_U_SHORT !! 507 return RX_DROP_UNUSABLE;
536 if (status->flag & RX_FLAG_MIC 508 if (status->flag & RX_FLAG_MIC_STRIPPED)
537 mic_len = 0; 509 mic_len = 0;
538 } else { 510 } else {
539 if (skb_linearize(rx->skb)) 511 if (skb_linearize(rx->skb))
540 return RX_DROP_U_OOM; !! 512 return RX_DROP_UNUSABLE;
541 } 513 }
542 514
543 /* reload hdr - skb might have been re <<
544 hdr = (void *)rx->skb->data; <<
545 <<
546 data_len = skb->len - hdrlen - IEEE802 515 data_len = skb->len - hdrlen - IEEE80211_CCMP_HDR_LEN - mic_len;
547 if (!rx->sta || data_len < 0) 516 if (!rx->sta || data_len < 0)
548 return RX_DROP_U_SHORT_CCMP; !! 517 return RX_DROP_UNUSABLE;
549 518
550 if (!(status->flag & RX_FLAG_PN_VALIDA 519 if (!(status->flag & RX_FLAG_PN_VALIDATED)) {
551 int res; 520 int res;
552 521
553 ccmp_hdr2pn(pn, skb->data + hd 522 ccmp_hdr2pn(pn, skb->data + hdrlen);
554 523
555 queue = rx->security_idx; 524 queue = rx->security_idx;
556 525
557 res = memcmp(pn, key->u.ccmp.r 526 res = memcmp(pn, key->u.ccmp.rx_pn[queue],
558 IEEE80211_CCMP_PN 527 IEEE80211_CCMP_PN_LEN);
559 if (res < 0 || 528 if (res < 0 ||
560 (!res && !(status->flag & 529 (!res && !(status->flag & RX_FLAG_ALLOW_SAME_PN))) {
561 key->u.ccmp.replays++; 530 key->u.ccmp.replays++;
562 return RX_DROP_U_REPLA !! 531 return RX_DROP_UNUSABLE;
563 } 532 }
564 533
565 if (!(status->flag & RX_FLAG_D 534 if (!(status->flag & RX_FLAG_DECRYPTED)) {
566 u8 aad[2 * AES_BLOCK_S 535 u8 aad[2 * AES_BLOCK_SIZE];
567 u8 b_0[AES_BLOCK_SIZE] 536 u8 b_0[AES_BLOCK_SIZE];
568 /* hardware didn't dec 537 /* hardware didn't decrypt/verify MIC */
569 ccmp_special_blocks(sk !! 538 ccmp_special_blocks(skb, pn, b_0, aad);
570 ke <<
571 539
572 if (ieee80211_aes_ccm_ 540 if (ieee80211_aes_ccm_decrypt(
573 key->u.ccm 541 key->u.ccmp.tfm, b_0, aad,
574 skb->data 542 skb->data + hdrlen + IEEE80211_CCMP_HDR_LEN,
575 data_len, 543 data_len,
576 skb->data !! 544 skb->data + skb->len - mic_len, mic_len))
577 return RX_DROP !! 545 return RX_DROP_UNUSABLE;
578 } 546 }
579 547
580 memcpy(key->u.ccmp.rx_pn[queue 548 memcpy(key->u.ccmp.rx_pn[queue], pn, IEEE80211_CCMP_PN_LEN);
581 if (unlikely(ieee80211_is_frag <<
582 memcpy(rx->ccm_gcm.pn, <<
583 } 549 }
584 550
585 /* Remove CCMP header and MIC */ 551 /* Remove CCMP header and MIC */
586 if (pskb_trim(skb, skb->len - mic_len) 552 if (pskb_trim(skb, skb->len - mic_len))
587 return RX_DROP_U_SHORT_CCMP_MI !! 553 return RX_DROP_UNUSABLE;
588 memmove(skb->data + IEEE80211_CCMP_HDR 554 memmove(skb->data + IEEE80211_CCMP_HDR_LEN, skb->data, hdrlen);
589 skb_pull(skb, IEEE80211_CCMP_HDR_LEN); 555 skb_pull(skb, IEEE80211_CCMP_HDR_LEN);
590 556
591 return RX_CONTINUE; 557 return RX_CONTINUE;
592 } 558 }
593 559
594 static void gcmp_special_blocks(struct sk_buff !! 560 static void gcmp_special_blocks(struct sk_buff *skb, u8 *pn, u8 *j_0, u8 *aad)
595 bool spp_amsdu <<
596 { 561 {
597 struct ieee80211_hdr *hdr = (void *)sk !! 562 __le16 mask_fc;
>> 563 u8 qos_tid;
>> 564 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
598 565
599 memcpy(j_0, hdr->addr2, ETH_ALEN); 566 memcpy(j_0, hdr->addr2, ETH_ALEN);
600 memcpy(&j_0[ETH_ALEN], pn, IEEE80211_G 567 memcpy(&j_0[ETH_ALEN], pn, IEEE80211_GCMP_PN_LEN);
601 j_0[13] = 0; 568 j_0[13] = 0;
602 j_0[14] = 0; 569 j_0[14] = 0;
603 j_0[AES_BLOCK_SIZE - 1] = 0x01; 570 j_0[AES_BLOCK_SIZE - 1] = 0x01;
604 571
605 ccmp_gcmp_aad(skb, aad, spp_amsdu); !! 572 /* AAD (extra authenticate-only data) / masked 802.11 header
>> 573 * FC | A1 | A2 | A3 | SC | [A4] | [QC]
>> 574 */
>> 575 put_unaligned_be16(ieee80211_hdrlen(hdr->frame_control) - 2, &aad[0]);
>> 576 /* Mask FC: zero subtype b4 b5 b6 (if not mgmt)
>> 577 * Retry, PwrMgt, MoreData; set Protected
>> 578 */
>> 579 mask_fc = hdr->frame_control;
>> 580 mask_fc &= ~cpu_to_le16(IEEE80211_FCTL_RETRY |
>> 581 IEEE80211_FCTL_PM | IEEE80211_FCTL_MOREDATA);
>> 582 if (!ieee80211_is_mgmt(hdr->frame_control))
>> 583 mask_fc &= ~cpu_to_le16(0x0070);
>> 584 mask_fc |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
>> 585
>> 586 put_unaligned(mask_fc, (__le16 *)&aad[2]);
>> 587 memcpy(&aad[4], &hdr->addr1, 3 * ETH_ALEN);
>> 588
>> 589 /* Mask Seq#, leave Frag# */
>> 590 aad[22] = *((u8 *)&hdr->seq_ctrl) & 0x0f;
>> 591 aad[23] = 0;
>> 592
>> 593 if (ieee80211_is_data_qos(hdr->frame_control))
>> 594 qos_tid = *ieee80211_get_qos_ctl(hdr) &
>> 595 IEEE80211_QOS_CTL_TID_MASK;
>> 596 else
>> 597 qos_tid = 0;
>> 598
>> 599 if (ieee80211_has_a4(hdr->frame_control)) {
>> 600 memcpy(&aad[24], hdr->addr4, ETH_ALEN);
>> 601 aad[30] = qos_tid;
>> 602 aad[31] = 0;
>> 603 } else {
>> 604 memset(&aad[24], 0, ETH_ALEN + IEEE80211_QOS_CTL_LEN);
>> 605 aad[24] = qos_tid;
>> 606 }
606 } 607 }
607 608
608 static inline void gcmp_pn2hdr(u8 *hdr, const 609 static inline void gcmp_pn2hdr(u8 *hdr, const u8 *pn, int key_id)
609 { 610 {
610 hdr[0] = pn[5]; 611 hdr[0] = pn[5];
611 hdr[1] = pn[4]; 612 hdr[1] = pn[4];
612 hdr[2] = 0; 613 hdr[2] = 0;
613 hdr[3] = 0x20 | (key_id << 6); 614 hdr[3] = 0x20 | (key_id << 6);
614 hdr[4] = pn[3]; 615 hdr[4] = pn[3];
615 hdr[5] = pn[2]; 616 hdr[5] = pn[2];
616 hdr[6] = pn[1]; 617 hdr[6] = pn[1];
617 hdr[7] = pn[0]; 618 hdr[7] = pn[0];
618 } 619 }
619 620
620 static inline void gcmp_hdr2pn(u8 *pn, const u 621 static inline void gcmp_hdr2pn(u8 *pn, const u8 *hdr)
621 { 622 {
622 pn[0] = hdr[7]; 623 pn[0] = hdr[7];
623 pn[1] = hdr[6]; 624 pn[1] = hdr[6];
624 pn[2] = hdr[5]; 625 pn[2] = hdr[5];
625 pn[3] = hdr[4]; 626 pn[3] = hdr[4];
626 pn[4] = hdr[1]; 627 pn[4] = hdr[1];
627 pn[5] = hdr[0]; 628 pn[5] = hdr[0];
628 } 629 }
629 630
630 static int gcmp_encrypt_skb(struct ieee80211_t 631 static int gcmp_encrypt_skb(struct ieee80211_tx_data *tx, struct sk_buff *skb)
631 { 632 {
632 struct ieee80211_hdr *hdr = (struct ie 633 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
633 struct ieee80211_key *key = tx->key; 634 struct ieee80211_key *key = tx->key;
634 struct ieee80211_tx_info *info = IEEE8 635 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
635 int hdrlen, len, tail; 636 int hdrlen, len, tail;
636 u8 *pos; 637 u8 *pos;
637 u8 pn[6]; 638 u8 pn[6];
638 u64 pn64; 639 u64 pn64;
639 u8 aad[GCM_AAD_LEN]; 640 u8 aad[GCM_AAD_LEN];
640 u8 j_0[AES_BLOCK_SIZE]; 641 u8 j_0[AES_BLOCK_SIZE];
641 642
642 if (info->control.hw_key && 643 if (info->control.hw_key &&
643 !(info->control.hw_key->flags & IE 644 !(info->control.hw_key->flags & IEEE80211_KEY_FLAG_GENERATE_IV) &&
644 !(info->control.hw_key->flags & IE 645 !(info->control.hw_key->flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE) &&
645 !((info->control.hw_key->flags & 646 !((info->control.hw_key->flags &
646 IEEE80211_KEY_FLAG_GENERATE_IV_ 647 IEEE80211_KEY_FLAG_GENERATE_IV_MGMT) &&
647 ieee80211_is_mgmt(hdr->frame_con 648 ieee80211_is_mgmt(hdr->frame_control))) {
648 /* hwaccel has no need for pre 649 /* hwaccel has no need for preallocated room for GCMP
649 * header or MIC fields 650 * header or MIC fields
650 */ 651 */
651 return 0; 652 return 0;
652 } 653 }
653 654
654 hdrlen = ieee80211_hdrlen(hdr->frame_c 655 hdrlen = ieee80211_hdrlen(hdr->frame_control);
655 len = skb->len - hdrlen; 656 len = skb->len - hdrlen;
656 657
657 if (info->control.hw_key) 658 if (info->control.hw_key)
658 tail = 0; 659 tail = 0;
659 else 660 else
660 tail = IEEE80211_GCMP_MIC_LEN; 661 tail = IEEE80211_GCMP_MIC_LEN;
661 662
662 if (WARN_ON(skb_tailroom(skb) < tail | 663 if (WARN_ON(skb_tailroom(skb) < tail ||
663 skb_headroom(skb) < IEEE80 664 skb_headroom(skb) < IEEE80211_GCMP_HDR_LEN))
664 return -1; 665 return -1;
665 666
666 pos = skb_push(skb, IEEE80211_GCMP_HDR 667 pos = skb_push(skb, IEEE80211_GCMP_HDR_LEN);
667 memmove(pos, pos + IEEE80211_GCMP_HDR_ 668 memmove(pos, pos + IEEE80211_GCMP_HDR_LEN, hdrlen);
668 skb_set_network_header(skb, skb_networ 669 skb_set_network_header(skb, skb_network_offset(skb) +
669 IEEE80211_ 670 IEEE80211_GCMP_HDR_LEN);
670 671
671 /* the HW only needs room for the IV, 672 /* the HW only needs room for the IV, but not the actual IV */
672 if (info->control.hw_key && 673 if (info->control.hw_key &&
673 (info->control.hw_key->flags & IEE 674 (info->control.hw_key->flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE))
674 return 0; 675 return 0;
675 676
>> 677 hdr = (struct ieee80211_hdr *)pos;
676 pos += hdrlen; 678 pos += hdrlen;
677 679
678 pn64 = atomic64_inc_return(&key->conf. 680 pn64 = atomic64_inc_return(&key->conf.tx_pn);
679 681
680 pn[5] = pn64; 682 pn[5] = pn64;
681 pn[4] = pn64 >> 8; 683 pn[4] = pn64 >> 8;
682 pn[3] = pn64 >> 16; 684 pn[3] = pn64 >> 16;
683 pn[2] = pn64 >> 24; 685 pn[2] = pn64 >> 24;
684 pn[1] = pn64 >> 32; 686 pn[1] = pn64 >> 32;
685 pn[0] = pn64 >> 40; 687 pn[0] = pn64 >> 40;
686 688
687 gcmp_pn2hdr(pos, pn, key->conf.keyidx) 689 gcmp_pn2hdr(pos, pn, key->conf.keyidx);
688 690
689 /* hwaccel - with software GCMP header 691 /* hwaccel - with software GCMP header */
690 if (info->control.hw_key) 692 if (info->control.hw_key)
691 return 0; 693 return 0;
692 694
693 pos += IEEE80211_GCMP_HDR_LEN; 695 pos += IEEE80211_GCMP_HDR_LEN;
694 gcmp_special_blocks(skb, pn, j_0, aad, !! 696 gcmp_special_blocks(skb, pn, j_0, aad);
695 key->conf.flags & <<
696 return ieee80211_aes_gcm_encrypt(key-> 697 return ieee80211_aes_gcm_encrypt(key->u.gcmp.tfm, j_0, aad, pos, len,
697 skb_p 698 skb_put(skb, IEEE80211_GCMP_MIC_LEN));
698 } 699 }
699 700
700 ieee80211_tx_result 701 ieee80211_tx_result
701 ieee80211_crypto_gcmp_encrypt(struct ieee80211 702 ieee80211_crypto_gcmp_encrypt(struct ieee80211_tx_data *tx)
702 { 703 {
703 struct sk_buff *skb; 704 struct sk_buff *skb;
704 705
705 ieee80211_tx_set_protected(tx); 706 ieee80211_tx_set_protected(tx);
706 707
707 skb_queue_walk(&tx->skbs, skb) { 708 skb_queue_walk(&tx->skbs, skb) {
708 if (gcmp_encrypt_skb(tx, skb) 709 if (gcmp_encrypt_skb(tx, skb) < 0)
709 return TX_DROP; 710 return TX_DROP;
710 } 711 }
711 712
712 return TX_CONTINUE; 713 return TX_CONTINUE;
713 } 714 }
714 715
715 ieee80211_rx_result 716 ieee80211_rx_result
716 ieee80211_crypto_gcmp_decrypt(struct ieee80211 717 ieee80211_crypto_gcmp_decrypt(struct ieee80211_rx_data *rx)
717 { 718 {
718 struct ieee80211_hdr *hdr = (struct ie 719 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data;
719 int hdrlen; 720 int hdrlen;
720 struct ieee80211_key *key = rx->key; 721 struct ieee80211_key *key = rx->key;
721 struct sk_buff *skb = rx->skb; 722 struct sk_buff *skb = rx->skb;
722 struct ieee80211_rx_status *status = I 723 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
723 u8 pn[IEEE80211_GCMP_PN_LEN]; 724 u8 pn[IEEE80211_GCMP_PN_LEN];
724 int data_len, queue, mic_len = IEEE802 725 int data_len, queue, mic_len = IEEE80211_GCMP_MIC_LEN;
725 726
726 hdrlen = ieee80211_hdrlen(hdr->frame_c 727 hdrlen = ieee80211_hdrlen(hdr->frame_control);
727 728
728 if (!ieee80211_is_data(hdr->frame_cont 729 if (!ieee80211_is_data(hdr->frame_control) &&
729 !ieee80211_is_robust_mgmt_frame(sk 730 !ieee80211_is_robust_mgmt_frame(skb))
730 return RX_CONTINUE; 731 return RX_CONTINUE;
731 732
732 if (status->flag & RX_FLAG_DECRYPTED) 733 if (status->flag & RX_FLAG_DECRYPTED) {
733 if (!pskb_may_pull(rx->skb, hd 734 if (!pskb_may_pull(rx->skb, hdrlen + IEEE80211_GCMP_HDR_LEN))
734 return RX_DROP_U_SHORT !! 735 return RX_DROP_UNUSABLE;
735 if (status->flag & RX_FLAG_MIC 736 if (status->flag & RX_FLAG_MIC_STRIPPED)
736 mic_len = 0; 737 mic_len = 0;
737 } else { 738 } else {
738 if (skb_linearize(rx->skb)) 739 if (skb_linearize(rx->skb))
739 return RX_DROP_U_OOM; !! 740 return RX_DROP_UNUSABLE;
740 } 741 }
741 742
742 /* reload hdr - skb might have been re <<
743 hdr = (void *)rx->skb->data; <<
744 <<
745 data_len = skb->len - hdrlen - IEEE802 743 data_len = skb->len - hdrlen - IEEE80211_GCMP_HDR_LEN - mic_len;
746 if (!rx->sta || data_len < 0) 744 if (!rx->sta || data_len < 0)
747 return RX_DROP_U_SHORT_GCMP; !! 745 return RX_DROP_UNUSABLE;
748 746
749 if (!(status->flag & RX_FLAG_PN_VALIDA 747 if (!(status->flag & RX_FLAG_PN_VALIDATED)) {
750 int res; 748 int res;
751 749
752 gcmp_hdr2pn(pn, skb->data + hd 750 gcmp_hdr2pn(pn, skb->data + hdrlen);
753 751
754 queue = rx->security_idx; 752 queue = rx->security_idx;
755 753
756 res = memcmp(pn, key->u.gcmp.r 754 res = memcmp(pn, key->u.gcmp.rx_pn[queue],
757 IEEE80211_GCMP_PN 755 IEEE80211_GCMP_PN_LEN);
758 if (res < 0 || 756 if (res < 0 ||
759 (!res && !(status->flag & 757 (!res && !(status->flag & RX_FLAG_ALLOW_SAME_PN))) {
760 key->u.gcmp.replays++; 758 key->u.gcmp.replays++;
761 return RX_DROP_U_REPLA !! 759 return RX_DROP_UNUSABLE;
762 } 760 }
763 761
764 if (!(status->flag & RX_FLAG_D 762 if (!(status->flag & RX_FLAG_DECRYPTED)) {
765 u8 aad[2 * AES_BLOCK_S 763 u8 aad[2 * AES_BLOCK_SIZE];
766 u8 j_0[AES_BLOCK_SIZE] 764 u8 j_0[AES_BLOCK_SIZE];
767 /* hardware didn't dec 765 /* hardware didn't decrypt/verify MIC */
768 gcmp_special_blocks(sk !! 766 gcmp_special_blocks(skb, pn, j_0, aad);
769 ke <<
770 767
771 if (ieee80211_aes_gcm_ 768 if (ieee80211_aes_gcm_decrypt(
772 key->u.gcm 769 key->u.gcmp.tfm, j_0, aad,
773 skb->data 770 skb->data + hdrlen + IEEE80211_GCMP_HDR_LEN,
774 data_len, 771 data_len,
775 skb->data 772 skb->data + skb->len -
776 IEEE80211_ 773 IEEE80211_GCMP_MIC_LEN))
777 return RX_DROP !! 774 return RX_DROP_UNUSABLE;
778 } 775 }
779 776
780 memcpy(key->u.gcmp.rx_pn[queue 777 memcpy(key->u.gcmp.rx_pn[queue], pn, IEEE80211_GCMP_PN_LEN);
781 if (unlikely(ieee80211_is_frag <<
782 memcpy(rx->ccm_gcm.pn, <<
783 } 778 }
784 779
785 /* Remove GCMP header and MIC */ 780 /* Remove GCMP header and MIC */
786 if (pskb_trim(skb, skb->len - mic_len) 781 if (pskb_trim(skb, skb->len - mic_len))
787 return RX_DROP_U_SHORT_GCMP_MI !! 782 return RX_DROP_UNUSABLE;
788 memmove(skb->data + IEEE80211_GCMP_HDR 783 memmove(skb->data + IEEE80211_GCMP_HDR_LEN, skb->data, hdrlen);
789 skb_pull(skb, IEEE80211_GCMP_HDR_LEN); 784 skb_pull(skb, IEEE80211_GCMP_HDR_LEN);
790 785
791 return RX_CONTINUE; 786 return RX_CONTINUE;
792 } 787 }
793 788
>> 789 static ieee80211_tx_result
>> 790 ieee80211_crypto_cs_encrypt(struct ieee80211_tx_data *tx,
>> 791 struct sk_buff *skb)
>> 792 {
>> 793 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
>> 794 struct ieee80211_key *key = tx->key;
>> 795 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
>> 796 int hdrlen;
>> 797 u8 *pos, iv_len = key->conf.iv_len;
>> 798
>> 799 if (info->control.hw_key &&
>> 800 !(info->control.hw_key->flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE)) {
>> 801 /* hwaccel has no need for preallocated head room */
>> 802 return TX_CONTINUE;
>> 803 }
>> 804
>> 805 if (unlikely(skb_headroom(skb) < iv_len &&
>> 806 pskb_expand_head(skb, iv_len, 0, GFP_ATOMIC)))
>> 807 return TX_DROP;
>> 808
>> 809 hdrlen = ieee80211_hdrlen(hdr->frame_control);
>> 810
>> 811 pos = skb_push(skb, iv_len);
>> 812 memmove(pos, pos + iv_len, hdrlen);
>> 813
>> 814 return TX_CONTINUE;
>> 815 }
>> 816
>> 817 static inline int ieee80211_crypto_cs_pn_compare(u8 *pn1, u8 *pn2, int len)
>> 818 {
>> 819 int i;
>> 820
>> 821 /* pn is little endian */
>> 822 for (i = len - 1; i >= 0; i--) {
>> 823 if (pn1[i] < pn2[i])
>> 824 return -1;
>> 825 else if (pn1[i] > pn2[i])
>> 826 return 1;
>> 827 }
>> 828
>> 829 return 0;
>> 830 }
>> 831
>> 832 static ieee80211_rx_result
>> 833 ieee80211_crypto_cs_decrypt(struct ieee80211_rx_data *rx)
>> 834 {
>> 835 struct ieee80211_key *key = rx->key;
>> 836 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data;
>> 837 const struct ieee80211_cipher_scheme *cs = NULL;
>> 838 int hdrlen = ieee80211_hdrlen(hdr->frame_control);
>> 839 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb);
>> 840 int data_len;
>> 841 u8 *rx_pn;
>> 842 u8 *skb_pn;
>> 843 u8 qos_tid;
>> 844
>> 845 if (!rx->sta || !rx->sta->cipher_scheme ||
>> 846 !(status->flag & RX_FLAG_DECRYPTED))
>> 847 return RX_DROP_UNUSABLE;
>> 848
>> 849 if (!ieee80211_is_data(hdr->frame_control))
>> 850 return RX_CONTINUE;
>> 851
>> 852 cs = rx->sta->cipher_scheme;
>> 853
>> 854 data_len = rx->skb->len - hdrlen - cs->hdr_len;
>> 855
>> 856 if (data_len < 0)
>> 857 return RX_DROP_UNUSABLE;
>> 858
>> 859 if (ieee80211_is_data_qos(hdr->frame_control))
>> 860 qos_tid = *ieee80211_get_qos_ctl(hdr) &
>> 861 IEEE80211_QOS_CTL_TID_MASK;
>> 862 else
>> 863 qos_tid = 0;
>> 864
>> 865 if (skb_linearize(rx->skb))
>> 866 return RX_DROP_UNUSABLE;
>> 867
>> 868 hdr = (struct ieee80211_hdr *)rx->skb->data;
>> 869
>> 870 rx_pn = key->u.gen.rx_pn[qos_tid];
>> 871 skb_pn = rx->skb->data + hdrlen + cs->pn_off;
>> 872
>> 873 if (ieee80211_crypto_cs_pn_compare(skb_pn, rx_pn, cs->pn_len) <= 0)
>> 874 return RX_DROP_UNUSABLE;
>> 875
>> 876 memcpy(rx_pn, skb_pn, cs->pn_len);
>> 877
>> 878 /* remove security header and MIC */
>> 879 if (pskb_trim(rx->skb, rx->skb->len - cs->mic_len))
>> 880 return RX_DROP_UNUSABLE;
>> 881
>> 882 memmove(rx->skb->data + cs->hdr_len, rx->skb->data, hdrlen);
>> 883 skb_pull(rx->skb, cs->hdr_len);
>> 884
>> 885 return RX_CONTINUE;
>> 886 }
>> 887
794 static void bip_aad(struct sk_buff *skb, u8 *a 888 static void bip_aad(struct sk_buff *skb, u8 *aad)
795 { 889 {
796 __le16 mask_fc; 890 __le16 mask_fc;
797 struct ieee80211_hdr *hdr = (struct ie 891 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
798 892
799 /* BIP AAD: FC(masked) || A1 || A2 || 893 /* BIP AAD: FC(masked) || A1 || A2 || A3 */
800 894
801 /* FC type/subtype */ 895 /* FC type/subtype */
802 /* Mask FC Retry, PwrMgt, MoreData fla 896 /* Mask FC Retry, PwrMgt, MoreData flags to zero */
803 mask_fc = hdr->frame_control; 897 mask_fc = hdr->frame_control;
804 mask_fc &= ~cpu_to_le16(IEEE80211_FCTL 898 mask_fc &= ~cpu_to_le16(IEEE80211_FCTL_RETRY | IEEE80211_FCTL_PM |
805 IEEE80211_FCTL 899 IEEE80211_FCTL_MOREDATA);
806 put_unaligned(mask_fc, (__le16 *) &aad 900 put_unaligned(mask_fc, (__le16 *) &aad[0]);
807 /* A1 || A2 || A3 */ 901 /* A1 || A2 || A3 */
808 memcpy(aad + 2, &hdr->addrs, 3 * ETH_A !! 902 memcpy(aad + 2, &hdr->addr1, 3 * ETH_ALEN);
809 } 903 }
810 904
811 905
812 static inline void bip_ipn_set64(u8 *d, u64 pn 906 static inline void bip_ipn_set64(u8 *d, u64 pn)
813 { 907 {
814 *d++ = pn; 908 *d++ = pn;
815 *d++ = pn >> 8; 909 *d++ = pn >> 8;
816 *d++ = pn >> 16; 910 *d++ = pn >> 16;
817 *d++ = pn >> 24; 911 *d++ = pn >> 24;
818 *d++ = pn >> 32; 912 *d++ = pn >> 32;
819 *d = pn >> 40; 913 *d = pn >> 40;
820 } 914 }
821 915
822 static inline void bip_ipn_swap(u8 *d, const u 916 static inline void bip_ipn_swap(u8 *d, const u8 *s)
823 { 917 {
824 *d++ = s[5]; 918 *d++ = s[5];
825 *d++ = s[4]; 919 *d++ = s[4];
826 *d++ = s[3]; 920 *d++ = s[3];
827 *d++ = s[2]; 921 *d++ = s[2];
828 *d++ = s[1]; 922 *d++ = s[1];
829 *d = s[0]; 923 *d = s[0];
830 } 924 }
831 925
832 926
833 ieee80211_tx_result 927 ieee80211_tx_result
834 ieee80211_crypto_aes_cmac_encrypt(struct ieee8 928 ieee80211_crypto_aes_cmac_encrypt(struct ieee80211_tx_data *tx)
835 { 929 {
836 struct sk_buff *skb; 930 struct sk_buff *skb;
837 struct ieee80211_tx_info *info; 931 struct ieee80211_tx_info *info;
838 struct ieee80211_key *key = tx->key; 932 struct ieee80211_key *key = tx->key;
839 struct ieee80211_mmie *mmie; 933 struct ieee80211_mmie *mmie;
840 u8 aad[20]; 934 u8 aad[20];
841 u64 pn64; 935 u64 pn64;
842 936
843 if (WARN_ON(skb_queue_len(&tx->skbs) ! 937 if (WARN_ON(skb_queue_len(&tx->skbs) != 1))
844 return TX_DROP; 938 return TX_DROP;
845 939
846 skb = skb_peek(&tx->skbs); 940 skb = skb_peek(&tx->skbs);
847 941
848 info = IEEE80211_SKB_CB(skb); 942 info = IEEE80211_SKB_CB(skb);
849 943
850 if (info->control.hw_key && !! 944 if (info->control.hw_key)
851 !(key->conf.flags & IEEE80211_KEY_ <<
852 return TX_CONTINUE; 945 return TX_CONTINUE;
853 946
854 if (WARN_ON(skb_tailroom(skb) < sizeof 947 if (WARN_ON(skb_tailroom(skb) < sizeof(*mmie)))
855 return TX_DROP; 948 return TX_DROP;
856 949
857 mmie = skb_put(skb, sizeof(*mmie)); !! 950 mmie = (struct ieee80211_mmie *) skb_put(skb, sizeof(*mmie));
858 mmie->element_id = WLAN_EID_MMIE; 951 mmie->element_id = WLAN_EID_MMIE;
859 mmie->length = sizeof(*mmie) - 2; 952 mmie->length = sizeof(*mmie) - 2;
860 mmie->key_id = cpu_to_le16(key->conf.k 953 mmie->key_id = cpu_to_le16(key->conf.keyidx);
861 954
862 /* PN = PN + 1 */ 955 /* PN = PN + 1 */
863 pn64 = atomic64_inc_return(&key->conf. 956 pn64 = atomic64_inc_return(&key->conf.tx_pn);
864 957
865 bip_ipn_set64(mmie->sequence_number, p 958 bip_ipn_set64(mmie->sequence_number, pn64);
866 959
867 if (info->control.hw_key) <<
868 return TX_CONTINUE; <<
869 <<
870 bip_aad(skb, aad); 960 bip_aad(skb, aad);
871 961
872 /* 962 /*
873 * MIC = AES-128-CMAC(IGTK, AAD || Man 963 * MIC = AES-128-CMAC(IGTK, AAD || Management Frame Body || MMIE, 64)
874 */ 964 */
875 ieee80211_aes_cmac(key->u.aes_cmac.tfm 965 ieee80211_aes_cmac(key->u.aes_cmac.tfm, aad,
876 skb->data + 24, skb 966 skb->data + 24, skb->len - 24, mmie->mic);
877 967
878 return TX_CONTINUE; 968 return TX_CONTINUE;
879 } 969 }
880 970
881 ieee80211_tx_result 971 ieee80211_tx_result
882 ieee80211_crypto_aes_cmac_256_encrypt(struct i 972 ieee80211_crypto_aes_cmac_256_encrypt(struct ieee80211_tx_data *tx)
883 { 973 {
884 struct sk_buff *skb; 974 struct sk_buff *skb;
885 struct ieee80211_tx_info *info; 975 struct ieee80211_tx_info *info;
886 struct ieee80211_key *key = tx->key; 976 struct ieee80211_key *key = tx->key;
887 struct ieee80211_mmie_16 *mmie; 977 struct ieee80211_mmie_16 *mmie;
888 u8 aad[20]; 978 u8 aad[20];
889 u64 pn64; 979 u64 pn64;
890 980
891 if (WARN_ON(skb_queue_len(&tx->skbs) ! 981 if (WARN_ON(skb_queue_len(&tx->skbs) != 1))
892 return TX_DROP; 982 return TX_DROP;
893 983
894 skb = skb_peek(&tx->skbs); 984 skb = skb_peek(&tx->skbs);
895 985
896 info = IEEE80211_SKB_CB(skb); 986 info = IEEE80211_SKB_CB(skb);
897 987
898 if (info->control.hw_key && !! 988 if (info->control.hw_key)
899 !(key->conf.flags & IEEE80211_KEY_ <<
900 return TX_CONTINUE; 989 return TX_CONTINUE;
901 990
902 if (WARN_ON(skb_tailroom(skb) < sizeof 991 if (WARN_ON(skb_tailroom(skb) < sizeof(*mmie)))
903 return TX_DROP; 992 return TX_DROP;
904 993
905 mmie = skb_put(skb, sizeof(*mmie)); !! 994 mmie = (struct ieee80211_mmie_16 *)skb_put(skb, sizeof(*mmie));
906 mmie->element_id = WLAN_EID_MMIE; 995 mmie->element_id = WLAN_EID_MMIE;
907 mmie->length = sizeof(*mmie) - 2; 996 mmie->length = sizeof(*mmie) - 2;
908 mmie->key_id = cpu_to_le16(key->conf.k 997 mmie->key_id = cpu_to_le16(key->conf.keyidx);
909 998
910 /* PN = PN + 1 */ 999 /* PN = PN + 1 */
911 pn64 = atomic64_inc_return(&key->conf. 1000 pn64 = atomic64_inc_return(&key->conf.tx_pn);
912 1001
913 bip_ipn_set64(mmie->sequence_number, p 1002 bip_ipn_set64(mmie->sequence_number, pn64);
914 1003
915 if (info->control.hw_key) <<
916 return TX_CONTINUE; <<
917 <<
918 bip_aad(skb, aad); 1004 bip_aad(skb, aad);
919 1005
920 /* MIC = AES-256-CMAC(IGTK, AAD || Man 1006 /* MIC = AES-256-CMAC(IGTK, AAD || Management Frame Body || MMIE, 128)
921 */ 1007 */
922 ieee80211_aes_cmac_256(key->u.aes_cmac 1008 ieee80211_aes_cmac_256(key->u.aes_cmac.tfm, aad,
923 skb->data + 24, 1009 skb->data + 24, skb->len - 24, mmie->mic);
924 1010
925 return TX_CONTINUE; 1011 return TX_CONTINUE;
926 } 1012 }
927 1013
928 ieee80211_rx_result 1014 ieee80211_rx_result
929 ieee80211_crypto_aes_cmac_decrypt(struct ieee8 1015 ieee80211_crypto_aes_cmac_decrypt(struct ieee80211_rx_data *rx)
930 { 1016 {
931 struct sk_buff *skb = rx->skb; 1017 struct sk_buff *skb = rx->skb;
932 struct ieee80211_rx_status *status = I 1018 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
933 struct ieee80211_key *key = rx->key; 1019 struct ieee80211_key *key = rx->key;
934 struct ieee80211_mmie *mmie; 1020 struct ieee80211_mmie *mmie;
935 u8 aad[20], mic[8], ipn[6]; 1021 u8 aad[20], mic[8], ipn[6];
936 struct ieee80211_hdr *hdr = (struct ie 1022 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
937 1023
938 if (!ieee80211_is_mgmt(hdr->frame_cont 1024 if (!ieee80211_is_mgmt(hdr->frame_control))
939 return RX_CONTINUE; 1025 return RX_CONTINUE;
940 1026
941 /* management frames are already linea 1027 /* management frames are already linear */
942 1028
943 if (skb->len < 24 + sizeof(*mmie)) 1029 if (skb->len < 24 + sizeof(*mmie))
944 return RX_DROP_U_SHORT_CMAC; !! 1030 return RX_DROP_UNUSABLE;
945 1031
946 mmie = (struct ieee80211_mmie *) 1032 mmie = (struct ieee80211_mmie *)
947 (skb->data + skb->len - sizeof 1033 (skb->data + skb->len - sizeof(*mmie));
948 if (mmie->element_id != WLAN_EID_MMIE 1034 if (mmie->element_id != WLAN_EID_MMIE ||
949 mmie->length != sizeof(*mmie) - 2) 1035 mmie->length != sizeof(*mmie) - 2)
950 return RX_DROP_U_BAD_MMIE; /* !! 1036 return RX_DROP_UNUSABLE; /* Invalid MMIE */
951 1037
952 bip_ipn_swap(ipn, mmie->sequence_numbe 1038 bip_ipn_swap(ipn, mmie->sequence_number);
953 1039
954 if (memcmp(ipn, key->u.aes_cmac.rx_pn, 1040 if (memcmp(ipn, key->u.aes_cmac.rx_pn, 6) <= 0) {
955 key->u.aes_cmac.replays++; 1041 key->u.aes_cmac.replays++;
956 return RX_DROP_U_REPLAY; !! 1042 return RX_DROP_UNUSABLE;
957 } 1043 }
958 1044
959 if (!(status->flag & RX_FLAG_DECRYPTED 1045 if (!(status->flag & RX_FLAG_DECRYPTED)) {
960 /* hardware didn't decrypt/ver 1046 /* hardware didn't decrypt/verify MIC */
961 bip_aad(skb, aad); 1047 bip_aad(skb, aad);
962 ieee80211_aes_cmac(key->u.aes_ 1048 ieee80211_aes_cmac(key->u.aes_cmac.tfm, aad,
963 skb->data + 1049 skb->data + 24, skb->len - 24, mic);
964 if (crypto_memneq(mic, mmie->m !! 1050 if (memcmp(mic, mmie->mic, sizeof(mmie->mic)) != 0) {
965 key->u.aes_cmac.icverr 1051 key->u.aes_cmac.icverrors++;
966 return RX_DROP_U_MIC_F !! 1052 return RX_DROP_UNUSABLE;
967 } 1053 }
968 } 1054 }
969 1055
970 memcpy(key->u.aes_cmac.rx_pn, ipn, 6); 1056 memcpy(key->u.aes_cmac.rx_pn, ipn, 6);
971 1057
972 /* Remove MMIE */ 1058 /* Remove MMIE */
973 skb_trim(skb, skb->len - sizeof(*mmie) 1059 skb_trim(skb, skb->len - sizeof(*mmie));
974 1060
975 return RX_CONTINUE; 1061 return RX_CONTINUE;
976 } 1062 }
977 1063
978 ieee80211_rx_result 1064 ieee80211_rx_result
979 ieee80211_crypto_aes_cmac_256_decrypt(struct i 1065 ieee80211_crypto_aes_cmac_256_decrypt(struct ieee80211_rx_data *rx)
980 { 1066 {
981 struct sk_buff *skb = rx->skb; 1067 struct sk_buff *skb = rx->skb;
982 struct ieee80211_rx_status *status = I 1068 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
983 struct ieee80211_key *key = rx->key; 1069 struct ieee80211_key *key = rx->key;
984 struct ieee80211_mmie_16 *mmie; 1070 struct ieee80211_mmie_16 *mmie;
985 u8 aad[20], mic[16], ipn[6]; 1071 u8 aad[20], mic[16], ipn[6];
986 struct ieee80211_hdr *hdr = (struct ie 1072 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
987 1073
988 if (!ieee80211_is_mgmt(hdr->frame_cont 1074 if (!ieee80211_is_mgmt(hdr->frame_control))
989 return RX_CONTINUE; 1075 return RX_CONTINUE;
990 1076
991 /* management frames are already linea 1077 /* management frames are already linear */
992 1078
993 if (skb->len < 24 + sizeof(*mmie)) 1079 if (skb->len < 24 + sizeof(*mmie))
994 return RX_DROP_U_SHORT_CMAC256 !! 1080 return RX_DROP_UNUSABLE;
995 1081
996 mmie = (struct ieee80211_mmie_16 *) 1082 mmie = (struct ieee80211_mmie_16 *)
997 (skb->data + skb->len - sizeof 1083 (skb->data + skb->len - sizeof(*mmie));
998 if (mmie->element_id != WLAN_EID_MMIE 1084 if (mmie->element_id != WLAN_EID_MMIE ||
999 mmie->length != sizeof(*mmie) - 2) 1085 mmie->length != sizeof(*mmie) - 2)
1000 return RX_DROP_U_BAD_MMIE; /* !! 1086 return RX_DROP_UNUSABLE; /* Invalid MMIE */
1001 1087
1002 bip_ipn_swap(ipn, mmie->sequence_numb 1088 bip_ipn_swap(ipn, mmie->sequence_number);
1003 1089
1004 if (memcmp(ipn, key->u.aes_cmac.rx_pn 1090 if (memcmp(ipn, key->u.aes_cmac.rx_pn, 6) <= 0) {
1005 key->u.aes_cmac.replays++; 1091 key->u.aes_cmac.replays++;
1006 return RX_DROP_U_REPLAY; !! 1092 return RX_DROP_UNUSABLE;
1007 } 1093 }
1008 1094
1009 if (!(status->flag & RX_FLAG_DECRYPTE 1095 if (!(status->flag & RX_FLAG_DECRYPTED)) {
1010 /* hardware didn't decrypt/ve 1096 /* hardware didn't decrypt/verify MIC */
1011 bip_aad(skb, aad); 1097 bip_aad(skb, aad);
1012 ieee80211_aes_cmac_256(key->u 1098 ieee80211_aes_cmac_256(key->u.aes_cmac.tfm, aad,
1013 skb->d 1099 skb->data + 24, skb->len - 24, mic);
1014 if (crypto_memneq(mic, mmie-> !! 1100 if (memcmp(mic, mmie->mic, sizeof(mmie->mic)) != 0) {
1015 key->u.aes_cmac.icver 1101 key->u.aes_cmac.icverrors++;
1016 return RX_DROP_U_MIC_ !! 1102 return RX_DROP_UNUSABLE;
1017 } 1103 }
1018 } 1104 }
1019 1105
1020 memcpy(key->u.aes_cmac.rx_pn, ipn, 6) 1106 memcpy(key->u.aes_cmac.rx_pn, ipn, 6);
1021 1107
1022 /* Remove MMIE */ 1108 /* Remove MMIE */
1023 skb_trim(skb, skb->len - sizeof(*mmie 1109 skb_trim(skb, skb->len - sizeof(*mmie));
1024 1110
1025 return RX_CONTINUE; 1111 return RX_CONTINUE;
1026 } 1112 }
1027 1113
1028 ieee80211_tx_result 1114 ieee80211_tx_result
1029 ieee80211_crypto_aes_gmac_encrypt(struct ieee 1115 ieee80211_crypto_aes_gmac_encrypt(struct ieee80211_tx_data *tx)
1030 { 1116 {
1031 struct sk_buff *skb; 1117 struct sk_buff *skb;
1032 struct ieee80211_tx_info *info; 1118 struct ieee80211_tx_info *info;
1033 struct ieee80211_key *key = tx->key; 1119 struct ieee80211_key *key = tx->key;
1034 struct ieee80211_mmie_16 *mmie; 1120 struct ieee80211_mmie_16 *mmie;
1035 struct ieee80211_hdr *hdr; 1121 struct ieee80211_hdr *hdr;
1036 u8 aad[GMAC_AAD_LEN]; 1122 u8 aad[GMAC_AAD_LEN];
1037 u64 pn64; 1123 u64 pn64;
1038 u8 nonce[GMAC_NONCE_LEN]; 1124 u8 nonce[GMAC_NONCE_LEN];
1039 1125
1040 if (WARN_ON(skb_queue_len(&tx->skbs) 1126 if (WARN_ON(skb_queue_len(&tx->skbs) != 1))
1041 return TX_DROP; 1127 return TX_DROP;
1042 1128
1043 skb = skb_peek(&tx->skbs); 1129 skb = skb_peek(&tx->skbs);
1044 1130
1045 info = IEEE80211_SKB_CB(skb); 1131 info = IEEE80211_SKB_CB(skb);
1046 1132
1047 if (info->control.hw_key && !! 1133 if (info->control.hw_key)
1048 !(key->conf.flags & IEEE80211_KEY <<
1049 return TX_CONTINUE; 1134 return TX_CONTINUE;
1050 1135
1051 if (WARN_ON(skb_tailroom(skb) < sizeo 1136 if (WARN_ON(skb_tailroom(skb) < sizeof(*mmie)))
1052 return TX_DROP; 1137 return TX_DROP;
1053 1138
1054 mmie = skb_put(skb, sizeof(*mmie)); !! 1139 mmie = (struct ieee80211_mmie_16 *)skb_put(skb, sizeof(*mmie));
1055 mmie->element_id = WLAN_EID_MMIE; 1140 mmie->element_id = WLAN_EID_MMIE;
1056 mmie->length = sizeof(*mmie) - 2; 1141 mmie->length = sizeof(*mmie) - 2;
1057 mmie->key_id = cpu_to_le16(key->conf. 1142 mmie->key_id = cpu_to_le16(key->conf.keyidx);
1058 1143
1059 /* PN = PN + 1 */ 1144 /* PN = PN + 1 */
1060 pn64 = atomic64_inc_return(&key->conf 1145 pn64 = atomic64_inc_return(&key->conf.tx_pn);
1061 1146
1062 bip_ipn_set64(mmie->sequence_number, 1147 bip_ipn_set64(mmie->sequence_number, pn64);
1063 1148
1064 if (info->control.hw_key) <<
1065 return TX_CONTINUE; <<
1066 <<
1067 bip_aad(skb, aad); 1149 bip_aad(skb, aad);
1068 1150
1069 hdr = (struct ieee80211_hdr *)skb->da 1151 hdr = (struct ieee80211_hdr *)skb->data;
1070 memcpy(nonce, hdr->addr2, ETH_ALEN); 1152 memcpy(nonce, hdr->addr2, ETH_ALEN);
1071 bip_ipn_swap(nonce + ETH_ALEN, mmie-> 1153 bip_ipn_swap(nonce + ETH_ALEN, mmie->sequence_number);
1072 1154
1073 /* MIC = AES-GMAC(IGTK, AAD || Manage 1155 /* MIC = AES-GMAC(IGTK, AAD || Management Frame Body || MMIE, 128) */
1074 if (ieee80211_aes_gmac(key->u.aes_gma 1156 if (ieee80211_aes_gmac(key->u.aes_gmac.tfm, aad, nonce,
1075 skb->data + 24 1157 skb->data + 24, skb->len - 24, mmie->mic) < 0)
1076 return TX_DROP; 1158 return TX_DROP;
1077 1159
1078 return TX_CONTINUE; 1160 return TX_CONTINUE;
1079 } 1161 }
1080 1162
1081 ieee80211_rx_result 1163 ieee80211_rx_result
1082 ieee80211_crypto_aes_gmac_decrypt(struct ieee 1164 ieee80211_crypto_aes_gmac_decrypt(struct ieee80211_rx_data *rx)
1083 { 1165 {
1084 struct sk_buff *skb = rx->skb; 1166 struct sk_buff *skb = rx->skb;
1085 struct ieee80211_rx_status *status = 1167 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
1086 struct ieee80211_key *key = rx->key; 1168 struct ieee80211_key *key = rx->key;
1087 struct ieee80211_mmie_16 *mmie; 1169 struct ieee80211_mmie_16 *mmie;
1088 u8 aad[GMAC_AAD_LEN], *mic, ipn[6], n !! 1170 u8 aad[GMAC_AAD_LEN], mic[GMAC_MIC_LEN], ipn[6], nonce[GMAC_NONCE_LEN];
1089 struct ieee80211_hdr *hdr = (struct i 1171 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
1090 1172
1091 if (!ieee80211_is_mgmt(hdr->frame_con 1173 if (!ieee80211_is_mgmt(hdr->frame_control))
1092 return RX_CONTINUE; 1174 return RX_CONTINUE;
1093 1175
1094 /* management frames are already line 1176 /* management frames are already linear */
1095 1177
1096 if (skb->len < 24 + sizeof(*mmie)) 1178 if (skb->len < 24 + sizeof(*mmie))
1097 return RX_DROP_U_SHORT_GMAC; !! 1179 return RX_DROP_UNUSABLE;
1098 1180
1099 mmie = (struct ieee80211_mmie_16 *) 1181 mmie = (struct ieee80211_mmie_16 *)
1100 (skb->data + skb->len - sizeo 1182 (skb->data + skb->len - sizeof(*mmie));
1101 if (mmie->element_id != WLAN_EID_MMIE 1183 if (mmie->element_id != WLAN_EID_MMIE ||
1102 mmie->length != sizeof(*mmie) - 2 1184 mmie->length != sizeof(*mmie) - 2)
1103 return RX_DROP_U_BAD_MMIE; /* !! 1185 return RX_DROP_UNUSABLE; /* Invalid MMIE */
1104 1186
1105 bip_ipn_swap(ipn, mmie->sequence_numb 1187 bip_ipn_swap(ipn, mmie->sequence_number);
1106 1188
1107 if (memcmp(ipn, key->u.aes_gmac.rx_pn 1189 if (memcmp(ipn, key->u.aes_gmac.rx_pn, 6) <= 0) {
1108 key->u.aes_gmac.replays++; 1190 key->u.aes_gmac.replays++;
1109 return RX_DROP_U_REPLAY; !! 1191 return RX_DROP_UNUSABLE;
1110 } 1192 }
1111 1193
1112 if (!(status->flag & RX_FLAG_DECRYPTE 1194 if (!(status->flag & RX_FLAG_DECRYPTED)) {
1113 /* hardware didn't decrypt/ve 1195 /* hardware didn't decrypt/verify MIC */
1114 bip_aad(skb, aad); 1196 bip_aad(skb, aad);
1115 1197
1116 memcpy(nonce, hdr->addr2, ETH 1198 memcpy(nonce, hdr->addr2, ETH_ALEN);
1117 memcpy(nonce + ETH_ALEN, ipn, 1199 memcpy(nonce + ETH_ALEN, ipn, 6);
1118 1200
1119 mic = kmalloc(GMAC_MIC_LEN, G <<
1120 if (!mic) <<
1121 return RX_DROP_U_OOM; <<
1122 if (ieee80211_aes_gmac(key->u 1201 if (ieee80211_aes_gmac(key->u.aes_gmac.tfm, aad, nonce,
1123 skb->d 1202 skb->data + 24, skb->len - 24,
1124 mic) < 1203 mic) < 0 ||
1125 crypto_memneq(mic, mmie-> !! 1204 memcmp(mic, mmie->mic, sizeof(mmie->mic)) != 0) {
1126 key->u.aes_gmac.icver 1205 key->u.aes_gmac.icverrors++;
1127 kfree(mic); !! 1206 return RX_DROP_UNUSABLE;
1128 return RX_DROP_U_MIC_ <<
1129 } 1207 }
1130 kfree(mic); <<
1131 } 1208 }
1132 1209
1133 memcpy(key->u.aes_gmac.rx_pn, ipn, 6) 1210 memcpy(key->u.aes_gmac.rx_pn, ipn, 6);
1134 1211
1135 /* Remove MMIE */ 1212 /* Remove MMIE */
1136 skb_trim(skb, skb->len - sizeof(*mmie 1213 skb_trim(skb, skb->len - sizeof(*mmie));
1137 1214
1138 return RX_CONTINUE; 1215 return RX_CONTINUE;
>> 1216 }
>> 1217
>> 1218 ieee80211_tx_result
>> 1219 ieee80211_crypto_hw_encrypt(struct ieee80211_tx_data *tx)
>> 1220 {
>> 1221 struct sk_buff *skb;
>> 1222 struct ieee80211_tx_info *info = NULL;
>> 1223 ieee80211_tx_result res;
>> 1224
>> 1225 skb_queue_walk(&tx->skbs, skb) {
>> 1226 info = IEEE80211_SKB_CB(skb);
>> 1227
>> 1228 /* handle hw-only algorithm */
>> 1229 if (!info->control.hw_key)
>> 1230 return TX_DROP;
>> 1231
>> 1232 if (tx->key->flags & KEY_FLAG_CIPHER_SCHEME) {
>> 1233 res = ieee80211_crypto_cs_encrypt(tx, skb);
>> 1234 if (res != TX_CONTINUE)
>> 1235 return res;
>> 1236 }
>> 1237 }
>> 1238
>> 1239 ieee80211_tx_set_protected(tx);
>> 1240
>> 1241 return TX_CONTINUE;
>> 1242 }
>> 1243
>> 1244 ieee80211_rx_result
>> 1245 ieee80211_crypto_hw_decrypt(struct ieee80211_rx_data *rx)
>> 1246 {
>> 1247 if (rx->sta && rx->sta->cipher_scheme)
>> 1248 return ieee80211_crypto_cs_decrypt(rx);
>> 1249
>> 1250 return RX_DROP_UNUSABLE;
1139 } 1251 }
1140 1252
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