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 <<
7 */ 6 */
8 7
9 #include <linux/netdevice.h> 8 #include <linux/netdevice.h>
10 #include <linux/types.h> 9 #include <linux/types.h>
11 #include <linux/skbuff.h> 10 #include <linux/skbuff.h>
12 #include <linux/compiler.h> 11 #include <linux/compiler.h>
13 #include <linux/ieee80211.h> 12 #include <linux/ieee80211.h>
14 #include <linux/gfp.h> 13 #include <linux/gfp.h>
15 #include <linux/unaligned.h> !! 14 #include <asm/unaligned.h>
16 #include <net/mac80211.h> 15 #include <net/mac80211.h>
17 #include <crypto/aes.h> 16 #include <crypto/aes.h>
18 #include <crypto/utils.h> !! 17 #include <crypto/algapi.h>
19 18
20 #include "ieee80211_i.h" 19 #include "ieee80211_i.h"
21 #include "michael.h" 20 #include "michael.h"
22 #include "tkip.h" 21 #include "tkip.h"
23 #include "aes_ccm.h" 22 #include "aes_ccm.h"
24 #include "aes_cmac.h" 23 #include "aes_cmac.h"
25 #include "aes_gmac.h" 24 #include "aes_gmac.h"
26 #include "aes_gcm.h" 25 #include "aes_gcm.h"
27 #include "wpa.h" 26 #include "wpa.h"
28 27
29 ieee80211_tx_result 28 ieee80211_tx_result
30 ieee80211_tx_h_michael_mic_add(struct ieee8021 29 ieee80211_tx_h_michael_mic_add(struct ieee80211_tx_data *tx)
31 { 30 {
32 u8 *data, *key, *mic; 31 u8 *data, *key, *mic;
33 size_t data_len; 32 size_t data_len;
34 unsigned int hdrlen; 33 unsigned int hdrlen;
35 struct ieee80211_hdr *hdr; 34 struct ieee80211_hdr *hdr;
36 struct sk_buff *skb = tx->skb; 35 struct sk_buff *skb = tx->skb;
37 struct ieee80211_tx_info *info = IEEE8 36 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
38 int tail; 37 int tail;
39 38
40 hdr = (struct ieee80211_hdr *)skb->dat 39 hdr = (struct ieee80211_hdr *)skb->data;
41 if (!tx->key || tx->key->conf.cipher ! 40 if (!tx->key || tx->key->conf.cipher != WLAN_CIPHER_SUITE_TKIP ||
42 skb->len < 24 || !ieee80211_is_dat 41 skb->len < 24 || !ieee80211_is_data_present(hdr->frame_control))
43 return TX_CONTINUE; 42 return TX_CONTINUE;
44 43
45 hdrlen = ieee80211_hdrlen(hdr->frame_c 44 hdrlen = ieee80211_hdrlen(hdr->frame_control);
46 if (skb->len < hdrlen) 45 if (skb->len < hdrlen)
47 return TX_DROP; 46 return TX_DROP;
48 47
49 data = skb->data + hdrlen; 48 data = skb->data + hdrlen;
50 data_len = skb->len - hdrlen; 49 data_len = skb->len - hdrlen;
51 50
52 if (unlikely(info->flags & IEEE80211_T 51 if (unlikely(info->flags & IEEE80211_TX_INTFL_TKIP_MIC_FAILURE)) {
53 /* Need to use software crypto 52 /* Need to use software crypto for the test */
54 info->control.hw_key = NULL; 53 info->control.hw_key = NULL;
55 } 54 }
56 55
57 if (info->control.hw_key && 56 if (info->control.hw_key &&
58 (info->flags & IEEE80211_TX_CTL_DO 57 (info->flags & IEEE80211_TX_CTL_DONTFRAG ||
59 ieee80211_hw_check(&tx->local->hw 58 ieee80211_hw_check(&tx->local->hw, SUPPORTS_TX_FRAG)) &&
60 !(tx->key->conf.flags & (IEEE80211 59 !(tx->key->conf.flags & (IEEE80211_KEY_FLAG_GENERATE_MMIC |
61 IEEE80211 60 IEEE80211_KEY_FLAG_PUT_MIC_SPACE))) {
62 /* hwaccel - with no need for 61 /* hwaccel - with no need for SW-generated MMIC or MIC space */
63 return TX_CONTINUE; 62 return TX_CONTINUE;
64 } 63 }
65 64
66 tail = MICHAEL_MIC_LEN; 65 tail = MICHAEL_MIC_LEN;
67 if (!info->control.hw_key) 66 if (!info->control.hw_key)
68 tail += IEEE80211_TKIP_ICV_LEN 67 tail += IEEE80211_TKIP_ICV_LEN;
69 68
70 if (WARN(skb_tailroom(skb) < tail || 69 if (WARN(skb_tailroom(skb) < tail ||
71 skb_headroom(skb) < IEEE80211 70 skb_headroom(skb) < IEEE80211_TKIP_IV_LEN,
72 "mmic: not enough head/tail ( 71 "mmic: not enough head/tail (%d/%d,%d/%d)\n",
73 skb_headroom(skb), IEEE80211_ 72 skb_headroom(skb), IEEE80211_TKIP_IV_LEN,
74 skb_tailroom(skb), tail)) 73 skb_tailroom(skb), tail))
75 return TX_DROP; 74 return TX_DROP;
76 75
77 mic = skb_put(skb, MICHAEL_MIC_LEN); 76 mic = skb_put(skb, MICHAEL_MIC_LEN);
78 77
79 if (tx->key->conf.flags & IEEE80211_KE 78 if (tx->key->conf.flags & IEEE80211_KEY_FLAG_PUT_MIC_SPACE) {
80 /* Zeroed MIC can help with de 79 /* Zeroed MIC can help with debug */
81 memset(mic, 0, MICHAEL_MIC_LEN 80 memset(mic, 0, MICHAEL_MIC_LEN);
82 return TX_CONTINUE; 81 return TX_CONTINUE;
83 } 82 }
84 83
85 key = &tx->key->conf.key[NL80211_TKIP_ 84 key = &tx->key->conf.key[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY];
86 michael_mic(key, hdr, data, data_len, 85 michael_mic(key, hdr, data, data_len, mic);
87 if (unlikely(info->flags & IEEE80211_T 86 if (unlikely(info->flags & IEEE80211_TX_INTFL_TKIP_MIC_FAILURE))
88 mic[0]++; 87 mic[0]++;
89 88
90 return TX_CONTINUE; 89 return TX_CONTINUE;
91 } 90 }
92 91
93 92
94 ieee80211_rx_result 93 ieee80211_rx_result
95 ieee80211_rx_h_michael_mic_verify(struct ieee8 94 ieee80211_rx_h_michael_mic_verify(struct ieee80211_rx_data *rx)
96 { 95 {
97 u8 *data, *key = NULL; 96 u8 *data, *key = NULL;
98 size_t data_len; 97 size_t data_len;
99 unsigned int hdrlen; 98 unsigned int hdrlen;
100 u8 mic[MICHAEL_MIC_LEN]; 99 u8 mic[MICHAEL_MIC_LEN];
101 struct sk_buff *skb = rx->skb; 100 struct sk_buff *skb = rx->skb;
102 struct ieee80211_rx_status *status = I 101 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
103 struct ieee80211_hdr *hdr = (struct ie 102 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
104 103
105 /* 104 /*
106 * it makes no sense to check for MIC 105 * it makes no sense to check for MIC errors on anything other
107 * than data frames. 106 * than data frames.
108 */ 107 */
109 if (!ieee80211_is_data_present(hdr->fr 108 if (!ieee80211_is_data_present(hdr->frame_control))
110 return RX_CONTINUE; 109 return RX_CONTINUE;
111 110
112 /* 111 /*
113 * No way to verify the MIC if the har 112 * No way to verify the MIC if the hardware stripped it or
114 * the IV with the key index. In this 113 * the IV with the key index. In this case we have solely rely
115 * on the driver to set RX_FLAG_MMIC_E 114 * on the driver to set RX_FLAG_MMIC_ERROR in the event of a
116 * MIC failure report. 115 * MIC failure report.
117 */ 116 */
118 if (status->flag & (RX_FLAG_MMIC_STRIP 117 if (status->flag & (RX_FLAG_MMIC_STRIPPED | RX_FLAG_IV_STRIPPED)) {
119 if (status->flag & RX_FLAG_MMI 118 if (status->flag & RX_FLAG_MMIC_ERROR)
120 goto mic_fail_no_key; 119 goto mic_fail_no_key;
121 120
122 if (!(status->flag & RX_FLAG_I 121 if (!(status->flag & RX_FLAG_IV_STRIPPED) && rx->key &&
123 rx->key->conf.cipher == WL 122 rx->key->conf.cipher == WLAN_CIPHER_SUITE_TKIP)
124 goto update_iv; 123 goto update_iv;
125 124
126 return RX_CONTINUE; 125 return RX_CONTINUE;
127 } 126 }
128 127
129 /* 128 /*
130 * Some hardware seems to generate Mic 129 * Some hardware seems to generate Michael MIC failure reports; even
131 * though, the frame was not encrypted 130 * though, the frame was not encrypted with TKIP and therefore has no
132 * MIC. Ignore the flag them to avoid 131 * MIC. Ignore the flag them to avoid triggering countermeasures.
133 */ 132 */
134 if (!rx->key || rx->key->conf.cipher ! 133 if (!rx->key || rx->key->conf.cipher != WLAN_CIPHER_SUITE_TKIP ||
135 !(status->flag & RX_FLAG_DECRYPTED 134 !(status->flag & RX_FLAG_DECRYPTED))
136 return RX_CONTINUE; 135 return RX_CONTINUE;
137 136
138 if (rx->sdata->vif.type == NL80211_IFT 137 if (rx->sdata->vif.type == NL80211_IFTYPE_AP && rx->key->conf.keyidx) {
139 /* 138 /*
140 * APs with pairwise keys shou 139 * APs with pairwise keys should never receive Michael MIC
141 * errors for non-zero keyidx 140 * errors for non-zero keyidx because these are reserved for
142 * group keys and only the AP 141 * group keys and only the AP is sending real multicast
143 * frames in the BSS. 142 * frames in the BSS.
144 */ 143 */
145 return RX_DROP_U_AP_RX_GROUPCA !! 144 return RX_DROP_UNUSABLE;
146 } 145 }
147 146
148 if (status->flag & RX_FLAG_MMIC_ERROR) 147 if (status->flag & RX_FLAG_MMIC_ERROR)
149 goto mic_fail; 148 goto mic_fail;
150 149
151 hdrlen = ieee80211_hdrlen(hdr->frame_c 150 hdrlen = ieee80211_hdrlen(hdr->frame_control);
152 if (skb->len < hdrlen + MICHAEL_MIC_LE 151 if (skb->len < hdrlen + MICHAEL_MIC_LEN)
153 return RX_DROP_U_SHORT_MMIC; !! 152 return RX_DROP_UNUSABLE;
154 153
155 if (skb_linearize(rx->skb)) 154 if (skb_linearize(rx->skb))
156 return RX_DROP_U_OOM; !! 155 return RX_DROP_UNUSABLE;
157 hdr = (void *)skb->data; 156 hdr = (void *)skb->data;
158 157
159 data = skb->data + hdrlen; 158 data = skb->data + hdrlen;
160 data_len = skb->len - hdrlen - MICHAEL 159 data_len = skb->len - hdrlen - MICHAEL_MIC_LEN;
161 key = &rx->key->conf.key[NL80211_TKIP_ 160 key = &rx->key->conf.key[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY];
162 michael_mic(key, hdr, data, data_len, 161 michael_mic(key, hdr, data, data_len, mic);
163 if (crypto_memneq(mic, data + data_len 162 if (crypto_memneq(mic, data + data_len, MICHAEL_MIC_LEN))
164 goto mic_fail; 163 goto mic_fail;
165 164
166 /* remove Michael MIC from payload */ 165 /* remove Michael MIC from payload */
167 skb_trim(skb, skb->len - MICHAEL_MIC_L 166 skb_trim(skb, skb->len - MICHAEL_MIC_LEN);
168 167
169 update_iv: 168 update_iv:
170 /* update IV in key information to be 169 /* update IV in key information to be able to detect replays */
171 rx->key->u.tkip.rx[rx->security_idx].i !! 170 rx->key->u.tkip.rx[rx->security_idx].iv32 = rx->tkip_iv32;
172 rx->key->u.tkip.rx[rx->security_idx].i !! 171 rx->key->u.tkip.rx[rx->security_idx].iv16 = rx->tkip_iv16;
173 172
174 return RX_CONTINUE; 173 return RX_CONTINUE;
175 174
176 mic_fail: 175 mic_fail:
177 rx->key->u.tkip.mic_failures++; 176 rx->key->u.tkip.mic_failures++;
178 177
179 mic_fail_no_key: 178 mic_fail_no_key:
180 /* 179 /*
181 * In some cases the key can be unset 180 * In some cases the key can be unset - e.g. a multicast packet, in
182 * a driver that supports HW encryptio 181 * a driver that supports HW encryption. Send up the key idx only if
183 * the key is set. 182 * the key is set.
184 */ 183 */
185 cfg80211_michael_mic_failure(rx->sdata 184 cfg80211_michael_mic_failure(rx->sdata->dev, hdr->addr2,
186 is_multic 185 is_multicast_ether_addr(hdr->addr1) ?
187 NL80211_K 186 NL80211_KEYTYPE_GROUP :
188 NL80211_K 187 NL80211_KEYTYPE_PAIRWISE,
189 rx->key ? 188 rx->key ? rx->key->conf.keyidx : -1,
190 NULL, GFP 189 NULL, GFP_ATOMIC);
191 return RX_DROP_U_MMIC_FAIL; !! 190 return RX_DROP_UNUSABLE;
192 } 191 }
193 192
194 static int tkip_encrypt_skb(struct ieee80211_t 193 static int tkip_encrypt_skb(struct ieee80211_tx_data *tx, struct sk_buff *skb)
195 { 194 {
196 struct ieee80211_hdr *hdr = (struct ie 195 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
197 struct ieee80211_key *key = tx->key; 196 struct ieee80211_key *key = tx->key;
198 struct ieee80211_tx_info *info = IEEE8 197 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
199 unsigned int hdrlen; 198 unsigned int hdrlen;
200 int len, tail; 199 int len, tail;
201 u64 pn; 200 u64 pn;
202 u8 *pos; 201 u8 *pos;
203 202
204 if (info->control.hw_key && 203 if (info->control.hw_key &&
205 !(info->control.hw_key->flags & IE 204 !(info->control.hw_key->flags & IEEE80211_KEY_FLAG_GENERATE_IV) &&
206 !(info->control.hw_key->flags & IE 205 !(info->control.hw_key->flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE)) {
207 /* hwaccel - with no need for 206 /* hwaccel - with no need for software-generated IV */
208 return 0; 207 return 0;
209 } 208 }
210 209
211 hdrlen = ieee80211_hdrlen(hdr->frame_c 210 hdrlen = ieee80211_hdrlen(hdr->frame_control);
212 len = skb->len - hdrlen; 211 len = skb->len - hdrlen;
213 212
214 if (info->control.hw_key) 213 if (info->control.hw_key)
215 tail = 0; 214 tail = 0;
216 else 215 else
217 tail = IEEE80211_TKIP_ICV_LEN; 216 tail = IEEE80211_TKIP_ICV_LEN;
218 217
219 if (WARN_ON(skb_tailroom(skb) < tail | 218 if (WARN_ON(skb_tailroom(skb) < tail ||
220 skb_headroom(skb) < IEEE80 219 skb_headroom(skb) < IEEE80211_TKIP_IV_LEN))
221 return -1; 220 return -1;
222 221
223 pos = skb_push(skb, IEEE80211_TKIP_IV_ 222 pos = skb_push(skb, IEEE80211_TKIP_IV_LEN);
224 memmove(pos, pos + IEEE80211_TKIP_IV_L 223 memmove(pos, pos + IEEE80211_TKIP_IV_LEN, hdrlen);
225 pos += hdrlen; 224 pos += hdrlen;
226 225
227 /* the HW only needs room for the IV, 226 /* the HW only needs room for the IV, but not the actual IV */
228 if (info->control.hw_key && 227 if (info->control.hw_key &&
229 (info->control.hw_key->flags & IEE 228 (info->control.hw_key->flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE))
230 return 0; 229 return 0;
231 230
232 /* Increase IV for the frame */ 231 /* Increase IV for the frame */
233 pn = atomic64_inc_return(&key->conf.tx 232 pn = atomic64_inc_return(&key->conf.tx_pn);
234 pos = ieee80211_tkip_add_iv(pos, &key- 233 pos = ieee80211_tkip_add_iv(pos, &key->conf, pn);
235 234
236 /* hwaccel - with software IV */ 235 /* hwaccel - with software IV */
237 if (info->control.hw_key) 236 if (info->control.hw_key)
238 return 0; 237 return 0;
239 238
240 /* Add room for ICV */ 239 /* Add room for ICV */
241 skb_put(skb, IEEE80211_TKIP_ICV_LEN); 240 skb_put(skb, IEEE80211_TKIP_ICV_LEN);
242 241
243 return ieee80211_tkip_encrypt_data(&tx 242 return ieee80211_tkip_encrypt_data(&tx->local->wep_tx_ctx,
244 key 243 key, skb, pos, len);
245 } 244 }
246 245
247 246
248 ieee80211_tx_result 247 ieee80211_tx_result
249 ieee80211_crypto_tkip_encrypt(struct ieee80211 248 ieee80211_crypto_tkip_encrypt(struct ieee80211_tx_data *tx)
250 { 249 {
251 struct sk_buff *skb; 250 struct sk_buff *skb;
252 251
253 ieee80211_tx_set_protected(tx); 252 ieee80211_tx_set_protected(tx);
254 253
255 skb_queue_walk(&tx->skbs, skb) { 254 skb_queue_walk(&tx->skbs, skb) {
256 if (tkip_encrypt_skb(tx, skb) 255 if (tkip_encrypt_skb(tx, skb) < 0)
257 return TX_DROP; 256 return TX_DROP;
258 } 257 }
259 258
260 return TX_CONTINUE; 259 return TX_CONTINUE;
261 } 260 }
262 261
263 262
264 ieee80211_rx_result 263 ieee80211_rx_result
265 ieee80211_crypto_tkip_decrypt(struct ieee80211 264 ieee80211_crypto_tkip_decrypt(struct ieee80211_rx_data *rx)
266 { 265 {
267 struct ieee80211_hdr *hdr = (struct ie 266 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) rx->skb->data;
268 int hdrlen, res, hwaccel = 0; 267 int hdrlen, res, hwaccel = 0;
269 struct ieee80211_key *key = rx->key; 268 struct ieee80211_key *key = rx->key;
270 struct sk_buff *skb = rx->skb; 269 struct sk_buff *skb = rx->skb;
271 struct ieee80211_rx_status *status = I 270 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
272 271
273 hdrlen = ieee80211_hdrlen(hdr->frame_c 272 hdrlen = ieee80211_hdrlen(hdr->frame_control);
274 273
275 if (!ieee80211_is_data(hdr->frame_cont 274 if (!ieee80211_is_data(hdr->frame_control))
276 return RX_CONTINUE; 275 return RX_CONTINUE;
277 276
278 if (!rx->sta || skb->len - hdrlen < 12 277 if (!rx->sta || skb->len - hdrlen < 12)
279 return RX_DROP_U_SHORT_TKIP; !! 278 return RX_DROP_UNUSABLE;
280 279
281 /* it may be possible to optimize this 280 /* it may be possible to optimize this a bit more */
282 if (skb_linearize(rx->skb)) 281 if (skb_linearize(rx->skb))
283 return RX_DROP_U_OOM; !! 282 return RX_DROP_UNUSABLE;
284 hdr = (void *)skb->data; 283 hdr = (void *)skb->data;
285 284
286 /* 285 /*
287 * Let TKIP code verify IV, but skip d 286 * Let TKIP code verify IV, but skip decryption.
288 * In the case where hardware checks t 287 * In the case where hardware checks the IV as well,
289 * we don't even get here, see ieee802 288 * we don't even get here, see ieee80211_rx_h_decrypt()
290 */ 289 */
291 if (status->flag & RX_FLAG_DECRYPTED) 290 if (status->flag & RX_FLAG_DECRYPTED)
292 hwaccel = 1; 291 hwaccel = 1;
293 292
294 res = ieee80211_tkip_decrypt_data(&rx- 293 res = ieee80211_tkip_decrypt_data(&rx->local->wep_rx_ctx,
295 key, 294 key, skb->data + hdrlen,
296 skb- 295 skb->len - hdrlen, rx->sta->sta.addr,
297 hdr- 296 hdr->addr1, hwaccel, rx->security_idx,
298 &rx- !! 297 &rx->tkip_iv32,
299 &rx- !! 298 &rx->tkip_iv16);
300 if (res != TKIP_DECRYPT_OK) 299 if (res != TKIP_DECRYPT_OK)
301 return RX_DROP_U_TKIP_FAIL; !! 300 return RX_DROP_UNUSABLE;
302 301
303 /* Trim ICV */ 302 /* Trim ICV */
304 if (!(status->flag & RX_FLAG_ICV_STRIP 303 if (!(status->flag & RX_FLAG_ICV_STRIPPED))
305 skb_trim(skb, skb->len - IEEE8 304 skb_trim(skb, skb->len - IEEE80211_TKIP_ICV_LEN);
306 305
307 /* Remove IV */ 306 /* Remove IV */
308 memmove(skb->data + IEEE80211_TKIP_IV_ 307 memmove(skb->data + IEEE80211_TKIP_IV_LEN, skb->data, hdrlen);
309 skb_pull(skb, IEEE80211_TKIP_IV_LEN); 308 skb_pull(skb, IEEE80211_TKIP_IV_LEN);
310 309
311 return RX_CONTINUE; 310 return RX_CONTINUE;
312 } 311 }
313 312
314 /* !! 313
315 * Calculate AAD for CCMP/GCMP, returning qos_ !! 314 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 { 315 {
320 struct ieee80211_hdr *hdr = (void *)sk <<
321 __le16 mask_fc; 316 __le16 mask_fc;
322 int a4_included, mgmt; 317 int a4_included, mgmt;
323 u8 qos_tid; 318 u8 qos_tid;
324 u16 len_a = 22; !! 319 u16 len_a;
>> 320 unsigned int hdrlen;
>> 321 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
325 322
326 /* 323 /*
327 * Mask FC: zero subtype b4 b5 b6 (if 324 * Mask FC: zero subtype b4 b5 b6 (if not mgmt)
328 * Retry, PwrMgt, MoreData, Order (if !! 325 * Retry, PwrMgt, MoreData; set Protected
329 */ 326 */
330 mgmt = ieee80211_is_mgmt(hdr->frame_co 327 mgmt = ieee80211_is_mgmt(hdr->frame_control);
331 mask_fc = hdr->frame_control; 328 mask_fc = hdr->frame_control;
332 mask_fc &= ~cpu_to_le16(IEEE80211_FCTL 329 mask_fc &= ~cpu_to_le16(IEEE80211_FCTL_RETRY |
333 IEEE80211_FCTL 330 IEEE80211_FCTL_PM | IEEE80211_FCTL_MOREDATA);
334 if (!mgmt) 331 if (!mgmt)
335 mask_fc &= ~cpu_to_le16(0x0070 332 mask_fc &= ~cpu_to_le16(0x0070);
336 mask_fc |= cpu_to_le16(IEEE80211_FCTL_ 333 mask_fc |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
337 334
>> 335 hdrlen = ieee80211_hdrlen(hdr->frame_control);
>> 336 len_a = hdrlen - 2;
338 a4_included = ieee80211_has_a4(hdr->fr 337 a4_included = ieee80211_has_a4(hdr->frame_control);
339 if (a4_included) <<
340 len_a += 6; <<
341 338
342 if (ieee80211_is_data_qos(hdr->frame_c !! 339 if (ieee80211_is_data_qos(hdr->frame_control))
343 qos_tid = *ieee80211_get_qos_c !! 340 qos_tid = ieee80211_get_tid(hdr);
>> 341 else
>> 342 qos_tid = 0;
344 343
345 if (spp_amsdu) !! 344 /* In CCM, the initial vectors (IV) used for CTR mode encryption and CBC
346 qos_tid &= IEEE80211_Q !! 345 * mode authentication are not allowed to collide, yet both are derived
347 IEEE80211_Q !! 346 * from this vector b_0. We only set L := 1 here to indicate that the
348 else !! 347 * data size can be represented in (L+1) bytes. The CCM layer will take
349 qos_tid &= IEEE80211_Q !! 348 * care of storing the data length in the top (L+1) bytes and setting
>> 349 * and clearing the other bits as is required to derive the two IVs.
>> 350 */
>> 351 b_0[0] = 0x1;
350 352
351 mask_fc &= ~cpu_to_le16(IEEE80 !! 353 /* Nonce: Nonce Flags | A2 | PN
352 len_a += 2; !! 354 * Nonce Flags: Priority (b0..b3) | Management (b4) | Reserved (b5..b7)
353 } else { !! 355 */
354 qos_tid = 0; !! 356 b_0[1] = qos_tid | (mgmt << 4);
355 } !! 357 memcpy(&b_0[2], hdr->addr2, ETH_ALEN);
>> 358 memcpy(&b_0[8], pn, IEEE80211_CCMP_PN_LEN);
356 359
357 /* AAD (extra authenticate-only data) 360 /* AAD (extra authenticate-only data) / masked 802.11 header
358 * FC | A1 | A2 | A3 | SC | [A4] | [QC 361 * FC | A1 | A2 | A3 | SC | [A4] | [QC] */
359 put_unaligned_be16(len_a, &aad[0]); 362 put_unaligned_be16(len_a, &aad[0]);
360 put_unaligned(mask_fc, (__le16 *)&aad[ 363 put_unaligned(mask_fc, (__le16 *)&aad[2]);
361 memcpy(&aad[4], &hdr->addrs, 3 * ETH_A !! 364 memcpy(&aad[4], &hdr->addr1, 3 * ETH_ALEN);
362 365
363 /* Mask Seq#, leave Frag# */ 366 /* Mask Seq#, leave Frag# */
364 aad[22] = *((u8 *) &hdr->seq_ctrl) & 0 367 aad[22] = *((u8 *) &hdr->seq_ctrl) & 0x0f;
365 aad[23] = 0; 368 aad[23] = 0;
366 369
367 if (a4_included) { 370 if (a4_included) {
368 memcpy(&aad[24], hdr->addr4, E 371 memcpy(&aad[24], hdr->addr4, ETH_ALEN);
369 aad[30] = qos_tid; 372 aad[30] = qos_tid;
370 aad[31] = 0; 373 aad[31] = 0;
371 } else { 374 } else {
372 memset(&aad[24], 0, ETH_ALEN + 375 memset(&aad[24], 0, ETH_ALEN + IEEE80211_QOS_CTL_LEN);
373 aad[24] = qos_tid; 376 aad[24] = qos_tid;
374 } 377 }
375 <<
376 return qos_tid; <<
377 } 378 }
378 379
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 } <<
401 380
402 static inline void ccmp_pn2hdr(u8 *hdr, u8 *pn 381 static inline void ccmp_pn2hdr(u8 *hdr, u8 *pn, int key_id)
403 { 382 {
404 hdr[0] = pn[5]; 383 hdr[0] = pn[5];
405 hdr[1] = pn[4]; 384 hdr[1] = pn[4];
406 hdr[2] = 0; 385 hdr[2] = 0;
407 hdr[3] = 0x20 | (key_id << 6); 386 hdr[3] = 0x20 | (key_id << 6);
408 hdr[4] = pn[3]; 387 hdr[4] = pn[3];
409 hdr[5] = pn[2]; 388 hdr[5] = pn[2];
410 hdr[6] = pn[1]; 389 hdr[6] = pn[1];
411 hdr[7] = pn[0]; 390 hdr[7] = pn[0];
412 } 391 }
413 392
414 393
415 static inline void ccmp_hdr2pn(u8 *pn, u8 *hdr 394 static inline void ccmp_hdr2pn(u8 *pn, u8 *hdr)
416 { 395 {
417 pn[0] = hdr[7]; 396 pn[0] = hdr[7];
418 pn[1] = hdr[6]; 397 pn[1] = hdr[6];
419 pn[2] = hdr[5]; 398 pn[2] = hdr[5];
420 pn[3] = hdr[4]; 399 pn[3] = hdr[4];
421 pn[4] = hdr[1]; 400 pn[4] = hdr[1];
422 pn[5] = hdr[0]; 401 pn[5] = hdr[0];
423 } 402 }
424 403
425 404
426 static int ccmp_encrypt_skb(struct ieee80211_t 405 static int ccmp_encrypt_skb(struct ieee80211_tx_data *tx, struct sk_buff *skb,
427 unsigned int mic_l 406 unsigned int mic_len)
428 { 407 {
429 struct ieee80211_hdr *hdr = (struct ie 408 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
430 struct ieee80211_key *key = tx->key; 409 struct ieee80211_key *key = tx->key;
431 struct ieee80211_tx_info *info = IEEE8 410 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
432 int hdrlen, len, tail; 411 int hdrlen, len, tail;
433 u8 *pos; 412 u8 *pos;
434 u8 pn[6]; 413 u8 pn[6];
435 u64 pn64; 414 u64 pn64;
436 u8 aad[CCM_AAD_LEN]; 415 u8 aad[CCM_AAD_LEN];
437 u8 b_0[AES_BLOCK_SIZE]; 416 u8 b_0[AES_BLOCK_SIZE];
438 417
439 if (info->control.hw_key && 418 if (info->control.hw_key &&
440 !(info->control.hw_key->flags & IE 419 !(info->control.hw_key->flags & IEEE80211_KEY_FLAG_GENERATE_IV) &&
441 !(info->control.hw_key->flags & IE 420 !(info->control.hw_key->flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE) &&
442 !((info->control.hw_key->flags & 421 !((info->control.hw_key->flags &
443 IEEE80211_KEY_FLAG_GENERATE_IV_ 422 IEEE80211_KEY_FLAG_GENERATE_IV_MGMT) &&
444 ieee80211_is_mgmt(hdr->frame_con 423 ieee80211_is_mgmt(hdr->frame_control))) {
445 /* 424 /*
446 * hwaccel has no need for pre 425 * hwaccel has no need for preallocated room for CCMP
447 * header or MIC fields 426 * header or MIC fields
448 */ 427 */
449 return 0; 428 return 0;
450 } 429 }
451 430
452 hdrlen = ieee80211_hdrlen(hdr->frame_c 431 hdrlen = ieee80211_hdrlen(hdr->frame_control);
453 len = skb->len - hdrlen; 432 len = skb->len - hdrlen;
454 433
455 if (info->control.hw_key) 434 if (info->control.hw_key)
456 tail = 0; 435 tail = 0;
457 else 436 else
458 tail = mic_len; 437 tail = mic_len;
459 438
460 if (WARN_ON(skb_tailroom(skb) < tail | 439 if (WARN_ON(skb_tailroom(skb) < tail ||
461 skb_headroom(skb) < IEEE80 440 skb_headroom(skb) < IEEE80211_CCMP_HDR_LEN))
462 return -1; 441 return -1;
463 442
464 pos = skb_push(skb, IEEE80211_CCMP_HDR 443 pos = skb_push(skb, IEEE80211_CCMP_HDR_LEN);
465 memmove(pos, pos + IEEE80211_CCMP_HDR_ 444 memmove(pos, pos + IEEE80211_CCMP_HDR_LEN, hdrlen);
466 445
467 /* the HW only needs room for the IV, 446 /* the HW only needs room for the IV, but not the actual IV */
468 if (info->control.hw_key && 447 if (info->control.hw_key &&
469 (info->control.hw_key->flags & IEE 448 (info->control.hw_key->flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE))
470 return 0; 449 return 0;
471 450
>> 451 hdr = (struct ieee80211_hdr *) pos;
472 pos += hdrlen; 452 pos += hdrlen;
473 453
474 pn64 = atomic64_inc_return(&key->conf. 454 pn64 = atomic64_inc_return(&key->conf.tx_pn);
475 455
476 pn[5] = pn64; 456 pn[5] = pn64;
477 pn[4] = pn64 >> 8; 457 pn[4] = pn64 >> 8;
478 pn[3] = pn64 >> 16; 458 pn[3] = pn64 >> 16;
479 pn[2] = pn64 >> 24; 459 pn[2] = pn64 >> 24;
480 pn[1] = pn64 >> 32; 460 pn[1] = pn64 >> 32;
481 pn[0] = pn64 >> 40; 461 pn[0] = pn64 >> 40;
482 462
483 ccmp_pn2hdr(pos, pn, key->conf.keyidx) 463 ccmp_pn2hdr(pos, pn, key->conf.keyidx);
484 464
485 /* hwaccel - with software CCMP header 465 /* hwaccel - with software CCMP header */
486 if (info->control.hw_key) 466 if (info->control.hw_key)
487 return 0; 467 return 0;
488 468
489 pos += IEEE80211_CCMP_HDR_LEN; 469 pos += IEEE80211_CCMP_HDR_LEN;
490 ccmp_special_blocks(skb, pn, b_0, aad, !! 470 ccmp_special_blocks(skb, pn, b_0, aad);
491 key->conf.flags & <<
492 return ieee80211_aes_ccm_encrypt(key-> 471 return ieee80211_aes_ccm_encrypt(key->u.ccmp.tfm, b_0, aad, pos, len,
493 skb_p 472 skb_put(skb, mic_len));
494 } 473 }
495 474
496 475
497 ieee80211_tx_result 476 ieee80211_tx_result
498 ieee80211_crypto_ccmp_encrypt(struct ieee80211 477 ieee80211_crypto_ccmp_encrypt(struct ieee80211_tx_data *tx,
499 unsigned int mic 478 unsigned int mic_len)
500 { 479 {
501 struct sk_buff *skb; 480 struct sk_buff *skb;
502 481
503 ieee80211_tx_set_protected(tx); 482 ieee80211_tx_set_protected(tx);
504 483
505 skb_queue_walk(&tx->skbs, skb) { 484 skb_queue_walk(&tx->skbs, skb) {
506 if (ccmp_encrypt_skb(tx, skb, 485 if (ccmp_encrypt_skb(tx, skb, mic_len) < 0)
507 return TX_DROP; 486 return TX_DROP;
508 } 487 }
509 488
510 return TX_CONTINUE; 489 return TX_CONTINUE;
511 } 490 }
512 491
513 492
514 ieee80211_rx_result 493 ieee80211_rx_result
515 ieee80211_crypto_ccmp_decrypt(struct ieee80211 494 ieee80211_crypto_ccmp_decrypt(struct ieee80211_rx_data *rx,
516 unsigned int mic 495 unsigned int mic_len)
517 { 496 {
518 struct ieee80211_hdr *hdr = (struct ie 497 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data;
519 int hdrlen; 498 int hdrlen;
520 struct ieee80211_key *key = rx->key; 499 struct ieee80211_key *key = rx->key;
521 struct sk_buff *skb = rx->skb; 500 struct sk_buff *skb = rx->skb;
522 struct ieee80211_rx_status *status = I 501 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
523 u8 pn[IEEE80211_CCMP_PN_LEN]; 502 u8 pn[IEEE80211_CCMP_PN_LEN];
524 int data_len; 503 int data_len;
525 int queue; 504 int queue;
526 505
527 hdrlen = ieee80211_hdrlen(hdr->frame_c 506 hdrlen = ieee80211_hdrlen(hdr->frame_control);
528 507
529 if (!ieee80211_is_data(hdr->frame_cont 508 if (!ieee80211_is_data(hdr->frame_control) &&
530 !ieee80211_is_robust_mgmt_frame(sk 509 !ieee80211_is_robust_mgmt_frame(skb))
531 return RX_CONTINUE; 510 return RX_CONTINUE;
532 511
533 if (status->flag & RX_FLAG_DECRYPTED) 512 if (status->flag & RX_FLAG_DECRYPTED) {
534 if (!pskb_may_pull(rx->skb, hd 513 if (!pskb_may_pull(rx->skb, hdrlen + IEEE80211_CCMP_HDR_LEN))
535 return RX_DROP_U_SHORT !! 514 return RX_DROP_UNUSABLE;
536 if (status->flag & RX_FLAG_MIC 515 if (status->flag & RX_FLAG_MIC_STRIPPED)
537 mic_len = 0; 516 mic_len = 0;
538 } else { 517 } else {
539 if (skb_linearize(rx->skb)) 518 if (skb_linearize(rx->skb))
540 return RX_DROP_U_OOM; !! 519 return RX_DROP_UNUSABLE;
541 } 520 }
542 521
543 /* reload hdr - skb might have been re <<
544 hdr = (void *)rx->skb->data; <<
545 <<
546 data_len = skb->len - hdrlen - IEEE802 522 data_len = skb->len - hdrlen - IEEE80211_CCMP_HDR_LEN - mic_len;
547 if (!rx->sta || data_len < 0) 523 if (!rx->sta || data_len < 0)
548 return RX_DROP_U_SHORT_CCMP; !! 524 return RX_DROP_UNUSABLE;
549 525
550 if (!(status->flag & RX_FLAG_PN_VALIDA 526 if (!(status->flag & RX_FLAG_PN_VALIDATED)) {
551 int res; 527 int res;
552 528
553 ccmp_hdr2pn(pn, skb->data + hd 529 ccmp_hdr2pn(pn, skb->data + hdrlen);
554 530
555 queue = rx->security_idx; 531 queue = rx->security_idx;
556 532
557 res = memcmp(pn, key->u.ccmp.r 533 res = memcmp(pn, key->u.ccmp.rx_pn[queue],
558 IEEE80211_CCMP_PN 534 IEEE80211_CCMP_PN_LEN);
559 if (res < 0 || 535 if (res < 0 ||
560 (!res && !(status->flag & 536 (!res && !(status->flag & RX_FLAG_ALLOW_SAME_PN))) {
561 key->u.ccmp.replays++; 537 key->u.ccmp.replays++;
562 return RX_DROP_U_REPLA !! 538 return RX_DROP_UNUSABLE;
563 } 539 }
564 540
565 if (!(status->flag & RX_FLAG_D 541 if (!(status->flag & RX_FLAG_DECRYPTED)) {
566 u8 aad[2 * AES_BLOCK_S 542 u8 aad[2 * AES_BLOCK_SIZE];
567 u8 b_0[AES_BLOCK_SIZE] 543 u8 b_0[AES_BLOCK_SIZE];
568 /* hardware didn't dec 544 /* hardware didn't decrypt/verify MIC */
569 ccmp_special_blocks(sk !! 545 ccmp_special_blocks(skb, pn, b_0, aad);
570 ke <<
571 546
572 if (ieee80211_aes_ccm_ 547 if (ieee80211_aes_ccm_decrypt(
573 key->u.ccm 548 key->u.ccmp.tfm, b_0, aad,
574 skb->data 549 skb->data + hdrlen + IEEE80211_CCMP_HDR_LEN,
575 data_len, 550 data_len,
576 skb->data 551 skb->data + skb->len - mic_len))
577 return RX_DROP !! 552 return RX_DROP_UNUSABLE;
578 } 553 }
579 554
580 memcpy(key->u.ccmp.rx_pn[queue 555 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 } 556 }
584 557
585 /* Remove CCMP header and MIC */ 558 /* Remove CCMP header and MIC */
586 if (pskb_trim(skb, skb->len - mic_len) 559 if (pskb_trim(skb, skb->len - mic_len))
587 return RX_DROP_U_SHORT_CCMP_MI !! 560 return RX_DROP_UNUSABLE;
588 memmove(skb->data + IEEE80211_CCMP_HDR 561 memmove(skb->data + IEEE80211_CCMP_HDR_LEN, skb->data, hdrlen);
589 skb_pull(skb, IEEE80211_CCMP_HDR_LEN); 562 skb_pull(skb, IEEE80211_CCMP_HDR_LEN);
590 563
591 return RX_CONTINUE; 564 return RX_CONTINUE;
592 } 565 }
593 566
594 static void gcmp_special_blocks(struct sk_buff !! 567 static void gcmp_special_blocks(struct sk_buff *skb, u8 *pn, u8 *j_0, u8 *aad)
595 bool spp_amsdu <<
596 { 568 {
597 struct ieee80211_hdr *hdr = (void *)sk !! 569 __le16 mask_fc;
>> 570 u8 qos_tid;
>> 571 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
598 572
599 memcpy(j_0, hdr->addr2, ETH_ALEN); 573 memcpy(j_0, hdr->addr2, ETH_ALEN);
600 memcpy(&j_0[ETH_ALEN], pn, IEEE80211_G 574 memcpy(&j_0[ETH_ALEN], pn, IEEE80211_GCMP_PN_LEN);
601 j_0[13] = 0; 575 j_0[13] = 0;
602 j_0[14] = 0; 576 j_0[14] = 0;
603 j_0[AES_BLOCK_SIZE - 1] = 0x01; 577 j_0[AES_BLOCK_SIZE - 1] = 0x01;
604 578
605 ccmp_gcmp_aad(skb, aad, spp_amsdu); !! 579 /* AAD (extra authenticate-only data) / masked 802.11 header
>> 580 * FC | A1 | A2 | A3 | SC | [A4] | [QC]
>> 581 */
>> 582 put_unaligned_be16(ieee80211_hdrlen(hdr->frame_control) - 2, &aad[0]);
>> 583 /* Mask FC: zero subtype b4 b5 b6 (if not mgmt)
>> 584 * Retry, PwrMgt, MoreData; set Protected
>> 585 */
>> 586 mask_fc = hdr->frame_control;
>> 587 mask_fc &= ~cpu_to_le16(IEEE80211_FCTL_RETRY |
>> 588 IEEE80211_FCTL_PM | IEEE80211_FCTL_MOREDATA);
>> 589 if (!ieee80211_is_mgmt(hdr->frame_control))
>> 590 mask_fc &= ~cpu_to_le16(0x0070);
>> 591 mask_fc |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
>> 592
>> 593 put_unaligned(mask_fc, (__le16 *)&aad[2]);
>> 594 memcpy(&aad[4], &hdr->addr1, 3 * ETH_ALEN);
>> 595
>> 596 /* Mask Seq#, leave Frag# */
>> 597 aad[22] = *((u8 *)&hdr->seq_ctrl) & 0x0f;
>> 598 aad[23] = 0;
>> 599
>> 600 if (ieee80211_is_data_qos(hdr->frame_control))
>> 601 qos_tid = ieee80211_get_tid(hdr);
>> 602 else
>> 603 qos_tid = 0;
>> 604
>> 605 if (ieee80211_has_a4(hdr->frame_control)) {
>> 606 memcpy(&aad[24], hdr->addr4, ETH_ALEN);
>> 607 aad[30] = qos_tid;
>> 608 aad[31] = 0;
>> 609 } else {
>> 610 memset(&aad[24], 0, ETH_ALEN + IEEE80211_QOS_CTL_LEN);
>> 611 aad[24] = qos_tid;
>> 612 }
606 } 613 }
607 614
608 static inline void gcmp_pn2hdr(u8 *hdr, const 615 static inline void gcmp_pn2hdr(u8 *hdr, const u8 *pn, int key_id)
609 { 616 {
610 hdr[0] = pn[5]; 617 hdr[0] = pn[5];
611 hdr[1] = pn[4]; 618 hdr[1] = pn[4];
612 hdr[2] = 0; 619 hdr[2] = 0;
613 hdr[3] = 0x20 | (key_id << 6); 620 hdr[3] = 0x20 | (key_id << 6);
614 hdr[4] = pn[3]; 621 hdr[4] = pn[3];
615 hdr[5] = pn[2]; 622 hdr[5] = pn[2];
616 hdr[6] = pn[1]; 623 hdr[6] = pn[1];
617 hdr[7] = pn[0]; 624 hdr[7] = pn[0];
618 } 625 }
619 626
620 static inline void gcmp_hdr2pn(u8 *pn, const u 627 static inline void gcmp_hdr2pn(u8 *pn, const u8 *hdr)
621 { 628 {
622 pn[0] = hdr[7]; 629 pn[0] = hdr[7];
623 pn[1] = hdr[6]; 630 pn[1] = hdr[6];
624 pn[2] = hdr[5]; 631 pn[2] = hdr[5];
625 pn[3] = hdr[4]; 632 pn[3] = hdr[4];
626 pn[4] = hdr[1]; 633 pn[4] = hdr[1];
627 pn[5] = hdr[0]; 634 pn[5] = hdr[0];
628 } 635 }
629 636
630 static int gcmp_encrypt_skb(struct ieee80211_t 637 static int gcmp_encrypt_skb(struct ieee80211_tx_data *tx, struct sk_buff *skb)
631 { 638 {
632 struct ieee80211_hdr *hdr = (struct ie 639 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
633 struct ieee80211_key *key = tx->key; 640 struct ieee80211_key *key = tx->key;
634 struct ieee80211_tx_info *info = IEEE8 641 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
635 int hdrlen, len, tail; 642 int hdrlen, len, tail;
636 u8 *pos; 643 u8 *pos;
637 u8 pn[6]; 644 u8 pn[6];
638 u64 pn64; 645 u64 pn64;
639 u8 aad[GCM_AAD_LEN]; 646 u8 aad[GCM_AAD_LEN];
640 u8 j_0[AES_BLOCK_SIZE]; 647 u8 j_0[AES_BLOCK_SIZE];
641 648
642 if (info->control.hw_key && 649 if (info->control.hw_key &&
643 !(info->control.hw_key->flags & IE 650 !(info->control.hw_key->flags & IEEE80211_KEY_FLAG_GENERATE_IV) &&
644 !(info->control.hw_key->flags & IE 651 !(info->control.hw_key->flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE) &&
645 !((info->control.hw_key->flags & 652 !((info->control.hw_key->flags &
646 IEEE80211_KEY_FLAG_GENERATE_IV_ 653 IEEE80211_KEY_FLAG_GENERATE_IV_MGMT) &&
647 ieee80211_is_mgmt(hdr->frame_con 654 ieee80211_is_mgmt(hdr->frame_control))) {
648 /* hwaccel has no need for pre 655 /* hwaccel has no need for preallocated room for GCMP
649 * header or MIC fields 656 * header or MIC fields
650 */ 657 */
651 return 0; 658 return 0;
652 } 659 }
653 660
654 hdrlen = ieee80211_hdrlen(hdr->frame_c 661 hdrlen = ieee80211_hdrlen(hdr->frame_control);
655 len = skb->len - hdrlen; 662 len = skb->len - hdrlen;
656 663
657 if (info->control.hw_key) 664 if (info->control.hw_key)
658 tail = 0; 665 tail = 0;
659 else 666 else
660 tail = IEEE80211_GCMP_MIC_LEN; 667 tail = IEEE80211_GCMP_MIC_LEN;
661 668
662 if (WARN_ON(skb_tailroom(skb) < tail | 669 if (WARN_ON(skb_tailroom(skb) < tail ||
663 skb_headroom(skb) < IEEE80 670 skb_headroom(skb) < IEEE80211_GCMP_HDR_LEN))
664 return -1; 671 return -1;
665 672
666 pos = skb_push(skb, IEEE80211_GCMP_HDR 673 pos = skb_push(skb, IEEE80211_GCMP_HDR_LEN);
667 memmove(pos, pos + IEEE80211_GCMP_HDR_ 674 memmove(pos, pos + IEEE80211_GCMP_HDR_LEN, hdrlen);
668 skb_set_network_header(skb, skb_networ 675 skb_set_network_header(skb, skb_network_offset(skb) +
669 IEEE80211_ 676 IEEE80211_GCMP_HDR_LEN);
670 677
671 /* the HW only needs room for the IV, 678 /* the HW only needs room for the IV, but not the actual IV */
672 if (info->control.hw_key && 679 if (info->control.hw_key &&
673 (info->control.hw_key->flags & IEE 680 (info->control.hw_key->flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE))
674 return 0; 681 return 0;
675 682
>> 683 hdr = (struct ieee80211_hdr *)pos;
676 pos += hdrlen; 684 pos += hdrlen;
677 685
678 pn64 = atomic64_inc_return(&key->conf. 686 pn64 = atomic64_inc_return(&key->conf.tx_pn);
679 687
680 pn[5] = pn64; 688 pn[5] = pn64;
681 pn[4] = pn64 >> 8; 689 pn[4] = pn64 >> 8;
682 pn[3] = pn64 >> 16; 690 pn[3] = pn64 >> 16;
683 pn[2] = pn64 >> 24; 691 pn[2] = pn64 >> 24;
684 pn[1] = pn64 >> 32; 692 pn[1] = pn64 >> 32;
685 pn[0] = pn64 >> 40; 693 pn[0] = pn64 >> 40;
686 694
687 gcmp_pn2hdr(pos, pn, key->conf.keyidx) 695 gcmp_pn2hdr(pos, pn, key->conf.keyidx);
688 696
689 /* hwaccel - with software GCMP header 697 /* hwaccel - with software GCMP header */
690 if (info->control.hw_key) 698 if (info->control.hw_key)
691 return 0; 699 return 0;
692 700
693 pos += IEEE80211_GCMP_HDR_LEN; 701 pos += IEEE80211_GCMP_HDR_LEN;
694 gcmp_special_blocks(skb, pn, j_0, aad, !! 702 gcmp_special_blocks(skb, pn, j_0, aad);
695 key->conf.flags & <<
696 return ieee80211_aes_gcm_encrypt(key-> 703 return ieee80211_aes_gcm_encrypt(key->u.gcmp.tfm, j_0, aad, pos, len,
697 skb_p 704 skb_put(skb, IEEE80211_GCMP_MIC_LEN));
698 } 705 }
699 706
700 ieee80211_tx_result 707 ieee80211_tx_result
701 ieee80211_crypto_gcmp_encrypt(struct ieee80211 708 ieee80211_crypto_gcmp_encrypt(struct ieee80211_tx_data *tx)
702 { 709 {
703 struct sk_buff *skb; 710 struct sk_buff *skb;
704 711
705 ieee80211_tx_set_protected(tx); 712 ieee80211_tx_set_protected(tx);
706 713
707 skb_queue_walk(&tx->skbs, skb) { 714 skb_queue_walk(&tx->skbs, skb) {
708 if (gcmp_encrypt_skb(tx, skb) 715 if (gcmp_encrypt_skb(tx, skb) < 0)
709 return TX_DROP; 716 return TX_DROP;
710 } 717 }
711 718
712 return TX_CONTINUE; 719 return TX_CONTINUE;
713 } 720 }
714 721
715 ieee80211_rx_result 722 ieee80211_rx_result
716 ieee80211_crypto_gcmp_decrypt(struct ieee80211 723 ieee80211_crypto_gcmp_decrypt(struct ieee80211_rx_data *rx)
717 { 724 {
718 struct ieee80211_hdr *hdr = (struct ie 725 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data;
719 int hdrlen; 726 int hdrlen;
720 struct ieee80211_key *key = rx->key; 727 struct ieee80211_key *key = rx->key;
721 struct sk_buff *skb = rx->skb; 728 struct sk_buff *skb = rx->skb;
722 struct ieee80211_rx_status *status = I 729 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
723 u8 pn[IEEE80211_GCMP_PN_LEN]; 730 u8 pn[IEEE80211_GCMP_PN_LEN];
724 int data_len, queue, mic_len = IEEE802 731 int data_len, queue, mic_len = IEEE80211_GCMP_MIC_LEN;
725 732
726 hdrlen = ieee80211_hdrlen(hdr->frame_c 733 hdrlen = ieee80211_hdrlen(hdr->frame_control);
727 734
728 if (!ieee80211_is_data(hdr->frame_cont 735 if (!ieee80211_is_data(hdr->frame_control) &&
729 !ieee80211_is_robust_mgmt_frame(sk 736 !ieee80211_is_robust_mgmt_frame(skb))
730 return RX_CONTINUE; 737 return RX_CONTINUE;
731 738
732 if (status->flag & RX_FLAG_DECRYPTED) 739 if (status->flag & RX_FLAG_DECRYPTED) {
733 if (!pskb_may_pull(rx->skb, hd 740 if (!pskb_may_pull(rx->skb, hdrlen + IEEE80211_GCMP_HDR_LEN))
734 return RX_DROP_U_SHORT !! 741 return RX_DROP_UNUSABLE;
735 if (status->flag & RX_FLAG_MIC 742 if (status->flag & RX_FLAG_MIC_STRIPPED)
736 mic_len = 0; 743 mic_len = 0;
737 } else { 744 } else {
738 if (skb_linearize(rx->skb)) 745 if (skb_linearize(rx->skb))
739 return RX_DROP_U_OOM; !! 746 return RX_DROP_UNUSABLE;
740 } 747 }
741 748
742 /* reload hdr - skb might have been re <<
743 hdr = (void *)rx->skb->data; <<
744 <<
745 data_len = skb->len - hdrlen - IEEE802 749 data_len = skb->len - hdrlen - IEEE80211_GCMP_HDR_LEN - mic_len;
746 if (!rx->sta || data_len < 0) 750 if (!rx->sta || data_len < 0)
747 return RX_DROP_U_SHORT_GCMP; !! 751 return RX_DROP_UNUSABLE;
748 752
749 if (!(status->flag & RX_FLAG_PN_VALIDA 753 if (!(status->flag & RX_FLAG_PN_VALIDATED)) {
750 int res; 754 int res;
751 755
752 gcmp_hdr2pn(pn, skb->data + hd 756 gcmp_hdr2pn(pn, skb->data + hdrlen);
753 757
754 queue = rx->security_idx; 758 queue = rx->security_idx;
755 759
756 res = memcmp(pn, key->u.gcmp.r 760 res = memcmp(pn, key->u.gcmp.rx_pn[queue],
757 IEEE80211_GCMP_PN 761 IEEE80211_GCMP_PN_LEN);
758 if (res < 0 || 762 if (res < 0 ||
759 (!res && !(status->flag & 763 (!res && !(status->flag & RX_FLAG_ALLOW_SAME_PN))) {
760 key->u.gcmp.replays++; 764 key->u.gcmp.replays++;
761 return RX_DROP_U_REPLA !! 765 return RX_DROP_UNUSABLE;
762 } 766 }
763 767
764 if (!(status->flag & RX_FLAG_D 768 if (!(status->flag & RX_FLAG_DECRYPTED)) {
765 u8 aad[2 * AES_BLOCK_S 769 u8 aad[2 * AES_BLOCK_SIZE];
766 u8 j_0[AES_BLOCK_SIZE] 770 u8 j_0[AES_BLOCK_SIZE];
767 /* hardware didn't dec 771 /* hardware didn't decrypt/verify MIC */
768 gcmp_special_blocks(sk !! 772 gcmp_special_blocks(skb, pn, j_0, aad);
769 ke <<
770 773
771 if (ieee80211_aes_gcm_ 774 if (ieee80211_aes_gcm_decrypt(
772 key->u.gcm 775 key->u.gcmp.tfm, j_0, aad,
773 skb->data 776 skb->data + hdrlen + IEEE80211_GCMP_HDR_LEN,
774 data_len, 777 data_len,
775 skb->data 778 skb->data + skb->len -
776 IEEE80211_ 779 IEEE80211_GCMP_MIC_LEN))
777 return RX_DROP !! 780 return RX_DROP_UNUSABLE;
778 } 781 }
779 782
780 memcpy(key->u.gcmp.rx_pn[queue 783 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 } 784 }
784 785
785 /* Remove GCMP header and MIC */ 786 /* Remove GCMP header and MIC */
786 if (pskb_trim(skb, skb->len - mic_len) 787 if (pskb_trim(skb, skb->len - mic_len))
787 return RX_DROP_U_SHORT_GCMP_MI !! 788 return RX_DROP_UNUSABLE;
788 memmove(skb->data + IEEE80211_GCMP_HDR 789 memmove(skb->data + IEEE80211_GCMP_HDR_LEN, skb->data, hdrlen);
789 skb_pull(skb, IEEE80211_GCMP_HDR_LEN); 790 skb_pull(skb, IEEE80211_GCMP_HDR_LEN);
790 791
791 return RX_CONTINUE; 792 return RX_CONTINUE;
792 } 793 }
793 794
>> 795 static ieee80211_tx_result
>> 796 ieee80211_crypto_cs_encrypt(struct ieee80211_tx_data *tx,
>> 797 struct sk_buff *skb)
>> 798 {
>> 799 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
>> 800 struct ieee80211_key *key = tx->key;
>> 801 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
>> 802 int hdrlen;
>> 803 u8 *pos, iv_len = key->conf.iv_len;
>> 804
>> 805 if (info->control.hw_key &&
>> 806 !(info->control.hw_key->flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE)) {
>> 807 /* hwaccel has no need for preallocated head room */
>> 808 return TX_CONTINUE;
>> 809 }
>> 810
>> 811 if (unlikely(skb_headroom(skb) < iv_len &&
>> 812 pskb_expand_head(skb, iv_len, 0, GFP_ATOMIC)))
>> 813 return TX_DROP;
>> 814
>> 815 hdrlen = ieee80211_hdrlen(hdr->frame_control);
>> 816
>> 817 pos = skb_push(skb, iv_len);
>> 818 memmove(pos, pos + iv_len, hdrlen);
>> 819
>> 820 return TX_CONTINUE;
>> 821 }
>> 822
>> 823 static inline int ieee80211_crypto_cs_pn_compare(u8 *pn1, u8 *pn2, int len)
>> 824 {
>> 825 int i;
>> 826
>> 827 /* pn is little endian */
>> 828 for (i = len - 1; i >= 0; i--) {
>> 829 if (pn1[i] < pn2[i])
>> 830 return -1;
>> 831 else if (pn1[i] > pn2[i])
>> 832 return 1;
>> 833 }
>> 834
>> 835 return 0;
>> 836 }
>> 837
>> 838 static ieee80211_rx_result
>> 839 ieee80211_crypto_cs_decrypt(struct ieee80211_rx_data *rx)
>> 840 {
>> 841 struct ieee80211_key *key = rx->key;
>> 842 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data;
>> 843 const struct ieee80211_cipher_scheme *cs = NULL;
>> 844 int hdrlen = ieee80211_hdrlen(hdr->frame_control);
>> 845 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb);
>> 846 int data_len;
>> 847 u8 *rx_pn;
>> 848 u8 *skb_pn;
>> 849 u8 qos_tid;
>> 850
>> 851 if (!rx->sta || !rx->sta->cipher_scheme ||
>> 852 !(status->flag & RX_FLAG_DECRYPTED))
>> 853 return RX_DROP_UNUSABLE;
>> 854
>> 855 if (!ieee80211_is_data(hdr->frame_control))
>> 856 return RX_CONTINUE;
>> 857
>> 858 cs = rx->sta->cipher_scheme;
>> 859
>> 860 data_len = rx->skb->len - hdrlen - cs->hdr_len;
>> 861
>> 862 if (data_len < 0)
>> 863 return RX_DROP_UNUSABLE;
>> 864
>> 865 if (ieee80211_is_data_qos(hdr->frame_control))
>> 866 qos_tid = ieee80211_get_tid(hdr);
>> 867 else
>> 868 qos_tid = 0;
>> 869
>> 870 if (skb_linearize(rx->skb))
>> 871 return RX_DROP_UNUSABLE;
>> 872
>> 873 hdr = (struct ieee80211_hdr *)rx->skb->data;
>> 874
>> 875 rx_pn = key->u.gen.rx_pn[qos_tid];
>> 876 skb_pn = rx->skb->data + hdrlen + cs->pn_off;
>> 877
>> 878 if (ieee80211_crypto_cs_pn_compare(skb_pn, rx_pn, cs->pn_len) <= 0)
>> 879 return RX_DROP_UNUSABLE;
>> 880
>> 881 memcpy(rx_pn, skb_pn, cs->pn_len);
>> 882
>> 883 /* remove security header and MIC */
>> 884 if (pskb_trim(rx->skb, rx->skb->len - cs->mic_len))
>> 885 return RX_DROP_UNUSABLE;
>> 886
>> 887 memmove(rx->skb->data + cs->hdr_len, rx->skb->data, hdrlen);
>> 888 skb_pull(rx->skb, cs->hdr_len);
>> 889
>> 890 return RX_CONTINUE;
>> 891 }
>> 892
794 static void bip_aad(struct sk_buff *skb, u8 *a 893 static void bip_aad(struct sk_buff *skb, u8 *aad)
795 { 894 {
796 __le16 mask_fc; 895 __le16 mask_fc;
797 struct ieee80211_hdr *hdr = (struct ie 896 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
798 897
799 /* BIP AAD: FC(masked) || A1 || A2 || 898 /* BIP AAD: FC(masked) || A1 || A2 || A3 */
800 899
801 /* FC type/subtype */ 900 /* FC type/subtype */
802 /* Mask FC Retry, PwrMgt, MoreData fla 901 /* Mask FC Retry, PwrMgt, MoreData flags to zero */
803 mask_fc = hdr->frame_control; 902 mask_fc = hdr->frame_control;
804 mask_fc &= ~cpu_to_le16(IEEE80211_FCTL 903 mask_fc &= ~cpu_to_le16(IEEE80211_FCTL_RETRY | IEEE80211_FCTL_PM |
805 IEEE80211_FCTL 904 IEEE80211_FCTL_MOREDATA);
806 put_unaligned(mask_fc, (__le16 *) &aad 905 put_unaligned(mask_fc, (__le16 *) &aad[0]);
807 /* A1 || A2 || A3 */ 906 /* A1 || A2 || A3 */
808 memcpy(aad + 2, &hdr->addrs, 3 * ETH_A !! 907 memcpy(aad + 2, &hdr->addr1, 3 * ETH_ALEN);
809 } 908 }
810 909
811 910
812 static inline void bip_ipn_set64(u8 *d, u64 pn 911 static inline void bip_ipn_set64(u8 *d, u64 pn)
813 { 912 {
814 *d++ = pn; 913 *d++ = pn;
815 *d++ = pn >> 8; 914 *d++ = pn >> 8;
816 *d++ = pn >> 16; 915 *d++ = pn >> 16;
817 *d++ = pn >> 24; 916 *d++ = pn >> 24;
818 *d++ = pn >> 32; 917 *d++ = pn >> 32;
819 *d = pn >> 40; 918 *d = pn >> 40;
820 } 919 }
821 920
822 static inline void bip_ipn_swap(u8 *d, const u 921 static inline void bip_ipn_swap(u8 *d, const u8 *s)
823 { 922 {
824 *d++ = s[5]; 923 *d++ = s[5];
825 *d++ = s[4]; 924 *d++ = s[4];
826 *d++ = s[3]; 925 *d++ = s[3];
827 *d++ = s[2]; 926 *d++ = s[2];
828 *d++ = s[1]; 927 *d++ = s[1];
829 *d = s[0]; 928 *d = s[0];
830 } 929 }
831 930
832 931
833 ieee80211_tx_result 932 ieee80211_tx_result
834 ieee80211_crypto_aes_cmac_encrypt(struct ieee8 933 ieee80211_crypto_aes_cmac_encrypt(struct ieee80211_tx_data *tx)
835 { 934 {
836 struct sk_buff *skb; 935 struct sk_buff *skb;
837 struct ieee80211_tx_info *info; 936 struct ieee80211_tx_info *info;
838 struct ieee80211_key *key = tx->key; 937 struct ieee80211_key *key = tx->key;
839 struct ieee80211_mmie *mmie; 938 struct ieee80211_mmie *mmie;
840 u8 aad[20]; 939 u8 aad[20];
841 u64 pn64; 940 u64 pn64;
842 941
843 if (WARN_ON(skb_queue_len(&tx->skbs) ! 942 if (WARN_ON(skb_queue_len(&tx->skbs) != 1))
844 return TX_DROP; 943 return TX_DROP;
845 944
846 skb = skb_peek(&tx->skbs); 945 skb = skb_peek(&tx->skbs);
847 946
848 info = IEEE80211_SKB_CB(skb); 947 info = IEEE80211_SKB_CB(skb);
849 948
850 if (info->control.hw_key && !! 949 if (info->control.hw_key)
851 !(key->conf.flags & IEEE80211_KEY_ <<
852 return TX_CONTINUE; 950 return TX_CONTINUE;
853 951
854 if (WARN_ON(skb_tailroom(skb) < sizeof 952 if (WARN_ON(skb_tailroom(skb) < sizeof(*mmie)))
855 return TX_DROP; 953 return TX_DROP;
856 954
857 mmie = skb_put(skb, sizeof(*mmie)); 955 mmie = skb_put(skb, sizeof(*mmie));
858 mmie->element_id = WLAN_EID_MMIE; 956 mmie->element_id = WLAN_EID_MMIE;
859 mmie->length = sizeof(*mmie) - 2; 957 mmie->length = sizeof(*mmie) - 2;
860 mmie->key_id = cpu_to_le16(key->conf.k 958 mmie->key_id = cpu_to_le16(key->conf.keyidx);
861 959
862 /* PN = PN + 1 */ 960 /* PN = PN + 1 */
863 pn64 = atomic64_inc_return(&key->conf. 961 pn64 = atomic64_inc_return(&key->conf.tx_pn);
864 962
865 bip_ipn_set64(mmie->sequence_number, p 963 bip_ipn_set64(mmie->sequence_number, pn64);
866 964
867 if (info->control.hw_key) <<
868 return TX_CONTINUE; <<
869 <<
870 bip_aad(skb, aad); 965 bip_aad(skb, aad);
871 966
872 /* 967 /*
873 * MIC = AES-128-CMAC(IGTK, AAD || Man 968 * MIC = AES-128-CMAC(IGTK, AAD || Management Frame Body || MMIE, 64)
874 */ 969 */
875 ieee80211_aes_cmac(key->u.aes_cmac.tfm 970 ieee80211_aes_cmac(key->u.aes_cmac.tfm, aad,
876 skb->data + 24, skb 971 skb->data + 24, skb->len - 24, mmie->mic);
877 972
878 return TX_CONTINUE; 973 return TX_CONTINUE;
879 } 974 }
880 975
881 ieee80211_tx_result 976 ieee80211_tx_result
882 ieee80211_crypto_aes_cmac_256_encrypt(struct i 977 ieee80211_crypto_aes_cmac_256_encrypt(struct ieee80211_tx_data *tx)
883 { 978 {
884 struct sk_buff *skb; 979 struct sk_buff *skb;
885 struct ieee80211_tx_info *info; 980 struct ieee80211_tx_info *info;
886 struct ieee80211_key *key = tx->key; 981 struct ieee80211_key *key = tx->key;
887 struct ieee80211_mmie_16 *mmie; 982 struct ieee80211_mmie_16 *mmie;
888 u8 aad[20]; 983 u8 aad[20];
889 u64 pn64; 984 u64 pn64;
890 985
891 if (WARN_ON(skb_queue_len(&tx->skbs) ! 986 if (WARN_ON(skb_queue_len(&tx->skbs) != 1))
892 return TX_DROP; 987 return TX_DROP;
893 988
894 skb = skb_peek(&tx->skbs); 989 skb = skb_peek(&tx->skbs);
895 990
896 info = IEEE80211_SKB_CB(skb); 991 info = IEEE80211_SKB_CB(skb);
897 992
898 if (info->control.hw_key && !! 993 if (info->control.hw_key)
899 !(key->conf.flags & IEEE80211_KEY_ <<
900 return TX_CONTINUE; 994 return TX_CONTINUE;
901 995
902 if (WARN_ON(skb_tailroom(skb) < sizeof 996 if (WARN_ON(skb_tailroom(skb) < sizeof(*mmie)))
903 return TX_DROP; 997 return TX_DROP;
904 998
905 mmie = skb_put(skb, sizeof(*mmie)); 999 mmie = skb_put(skb, sizeof(*mmie));
906 mmie->element_id = WLAN_EID_MMIE; 1000 mmie->element_id = WLAN_EID_MMIE;
907 mmie->length = sizeof(*mmie) - 2; 1001 mmie->length = sizeof(*mmie) - 2;
908 mmie->key_id = cpu_to_le16(key->conf.k 1002 mmie->key_id = cpu_to_le16(key->conf.keyidx);
909 1003
910 /* PN = PN + 1 */ 1004 /* PN = PN + 1 */
911 pn64 = atomic64_inc_return(&key->conf. 1005 pn64 = atomic64_inc_return(&key->conf.tx_pn);
912 1006
913 bip_ipn_set64(mmie->sequence_number, p 1007 bip_ipn_set64(mmie->sequence_number, pn64);
914 1008
915 if (info->control.hw_key) <<
916 return TX_CONTINUE; <<
917 <<
918 bip_aad(skb, aad); 1009 bip_aad(skb, aad);
919 1010
920 /* MIC = AES-256-CMAC(IGTK, AAD || Man 1011 /* MIC = AES-256-CMAC(IGTK, AAD || Management Frame Body || MMIE, 128)
921 */ 1012 */
922 ieee80211_aes_cmac_256(key->u.aes_cmac 1013 ieee80211_aes_cmac_256(key->u.aes_cmac.tfm, aad,
923 skb->data + 24, 1014 skb->data + 24, skb->len - 24, mmie->mic);
924 1015
925 return TX_CONTINUE; 1016 return TX_CONTINUE;
926 } 1017 }
927 1018
928 ieee80211_rx_result 1019 ieee80211_rx_result
929 ieee80211_crypto_aes_cmac_decrypt(struct ieee8 1020 ieee80211_crypto_aes_cmac_decrypt(struct ieee80211_rx_data *rx)
930 { 1021 {
931 struct sk_buff *skb = rx->skb; 1022 struct sk_buff *skb = rx->skb;
932 struct ieee80211_rx_status *status = I 1023 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
933 struct ieee80211_key *key = rx->key; 1024 struct ieee80211_key *key = rx->key;
934 struct ieee80211_mmie *mmie; 1025 struct ieee80211_mmie *mmie;
935 u8 aad[20], mic[8], ipn[6]; 1026 u8 aad[20], mic[8], ipn[6];
936 struct ieee80211_hdr *hdr = (struct ie 1027 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
937 1028
938 if (!ieee80211_is_mgmt(hdr->frame_cont 1029 if (!ieee80211_is_mgmt(hdr->frame_control))
939 return RX_CONTINUE; 1030 return RX_CONTINUE;
940 1031
941 /* management frames are already linea 1032 /* management frames are already linear */
942 1033
943 if (skb->len < 24 + sizeof(*mmie)) 1034 if (skb->len < 24 + sizeof(*mmie))
944 return RX_DROP_U_SHORT_CMAC; !! 1035 return RX_DROP_UNUSABLE;
945 1036
946 mmie = (struct ieee80211_mmie *) 1037 mmie = (struct ieee80211_mmie *)
947 (skb->data + skb->len - sizeof 1038 (skb->data + skb->len - sizeof(*mmie));
948 if (mmie->element_id != WLAN_EID_MMIE 1039 if (mmie->element_id != WLAN_EID_MMIE ||
949 mmie->length != sizeof(*mmie) - 2) 1040 mmie->length != sizeof(*mmie) - 2)
950 return RX_DROP_U_BAD_MMIE; /* !! 1041 return RX_DROP_UNUSABLE; /* Invalid MMIE */
951 1042
952 bip_ipn_swap(ipn, mmie->sequence_numbe 1043 bip_ipn_swap(ipn, mmie->sequence_number);
953 1044
954 if (memcmp(ipn, key->u.aes_cmac.rx_pn, 1045 if (memcmp(ipn, key->u.aes_cmac.rx_pn, 6) <= 0) {
955 key->u.aes_cmac.replays++; 1046 key->u.aes_cmac.replays++;
956 return RX_DROP_U_REPLAY; !! 1047 return RX_DROP_UNUSABLE;
957 } 1048 }
958 1049
959 if (!(status->flag & RX_FLAG_DECRYPTED 1050 if (!(status->flag & RX_FLAG_DECRYPTED)) {
960 /* hardware didn't decrypt/ver 1051 /* hardware didn't decrypt/verify MIC */
961 bip_aad(skb, aad); 1052 bip_aad(skb, aad);
962 ieee80211_aes_cmac(key->u.aes_ 1053 ieee80211_aes_cmac(key->u.aes_cmac.tfm, aad,
963 skb->data + 1054 skb->data + 24, skb->len - 24, mic);
964 if (crypto_memneq(mic, mmie->m 1055 if (crypto_memneq(mic, mmie->mic, sizeof(mmie->mic))) {
965 key->u.aes_cmac.icverr 1056 key->u.aes_cmac.icverrors++;
966 return RX_DROP_U_MIC_F !! 1057 return RX_DROP_UNUSABLE;
967 } 1058 }
968 } 1059 }
969 1060
970 memcpy(key->u.aes_cmac.rx_pn, ipn, 6); 1061 memcpy(key->u.aes_cmac.rx_pn, ipn, 6);
971 1062
972 /* Remove MMIE */ 1063 /* Remove MMIE */
973 skb_trim(skb, skb->len - sizeof(*mmie) 1064 skb_trim(skb, skb->len - sizeof(*mmie));
974 1065
975 return RX_CONTINUE; 1066 return RX_CONTINUE;
976 } 1067 }
977 1068
978 ieee80211_rx_result 1069 ieee80211_rx_result
979 ieee80211_crypto_aes_cmac_256_decrypt(struct i 1070 ieee80211_crypto_aes_cmac_256_decrypt(struct ieee80211_rx_data *rx)
980 { 1071 {
981 struct sk_buff *skb = rx->skb; 1072 struct sk_buff *skb = rx->skb;
982 struct ieee80211_rx_status *status = I 1073 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
983 struct ieee80211_key *key = rx->key; 1074 struct ieee80211_key *key = rx->key;
984 struct ieee80211_mmie_16 *mmie; 1075 struct ieee80211_mmie_16 *mmie;
985 u8 aad[20], mic[16], ipn[6]; 1076 u8 aad[20], mic[16], ipn[6];
986 struct ieee80211_hdr *hdr = (struct ie 1077 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
987 1078
988 if (!ieee80211_is_mgmt(hdr->frame_cont 1079 if (!ieee80211_is_mgmt(hdr->frame_control))
989 return RX_CONTINUE; 1080 return RX_CONTINUE;
990 1081
991 /* management frames are already linea 1082 /* management frames are already linear */
992 1083
993 if (skb->len < 24 + sizeof(*mmie)) 1084 if (skb->len < 24 + sizeof(*mmie))
994 return RX_DROP_U_SHORT_CMAC256 !! 1085 return RX_DROP_UNUSABLE;
995 1086
996 mmie = (struct ieee80211_mmie_16 *) 1087 mmie = (struct ieee80211_mmie_16 *)
997 (skb->data + skb->len - sizeof 1088 (skb->data + skb->len - sizeof(*mmie));
998 if (mmie->element_id != WLAN_EID_MMIE 1089 if (mmie->element_id != WLAN_EID_MMIE ||
999 mmie->length != sizeof(*mmie) - 2) 1090 mmie->length != sizeof(*mmie) - 2)
1000 return RX_DROP_U_BAD_MMIE; /* !! 1091 return RX_DROP_UNUSABLE; /* Invalid MMIE */
1001 1092
1002 bip_ipn_swap(ipn, mmie->sequence_numb 1093 bip_ipn_swap(ipn, mmie->sequence_number);
1003 1094
1004 if (memcmp(ipn, key->u.aes_cmac.rx_pn 1095 if (memcmp(ipn, key->u.aes_cmac.rx_pn, 6) <= 0) {
1005 key->u.aes_cmac.replays++; 1096 key->u.aes_cmac.replays++;
1006 return RX_DROP_U_REPLAY; !! 1097 return RX_DROP_UNUSABLE;
1007 } 1098 }
1008 1099
1009 if (!(status->flag & RX_FLAG_DECRYPTE 1100 if (!(status->flag & RX_FLAG_DECRYPTED)) {
1010 /* hardware didn't decrypt/ve 1101 /* hardware didn't decrypt/verify MIC */
1011 bip_aad(skb, aad); 1102 bip_aad(skb, aad);
1012 ieee80211_aes_cmac_256(key->u 1103 ieee80211_aes_cmac_256(key->u.aes_cmac.tfm, aad,
1013 skb->d 1104 skb->data + 24, skb->len - 24, mic);
1014 if (crypto_memneq(mic, mmie-> 1105 if (crypto_memneq(mic, mmie->mic, sizeof(mmie->mic))) {
1015 key->u.aes_cmac.icver 1106 key->u.aes_cmac.icverrors++;
1016 return RX_DROP_U_MIC_ !! 1107 return RX_DROP_UNUSABLE;
1017 } 1108 }
1018 } 1109 }
1019 1110
1020 memcpy(key->u.aes_cmac.rx_pn, ipn, 6) 1111 memcpy(key->u.aes_cmac.rx_pn, ipn, 6);
1021 1112
1022 /* Remove MMIE */ 1113 /* Remove MMIE */
1023 skb_trim(skb, skb->len - sizeof(*mmie 1114 skb_trim(skb, skb->len - sizeof(*mmie));
1024 1115
1025 return RX_CONTINUE; 1116 return RX_CONTINUE;
1026 } 1117 }
1027 1118
1028 ieee80211_tx_result 1119 ieee80211_tx_result
1029 ieee80211_crypto_aes_gmac_encrypt(struct ieee 1120 ieee80211_crypto_aes_gmac_encrypt(struct ieee80211_tx_data *tx)
1030 { 1121 {
1031 struct sk_buff *skb; 1122 struct sk_buff *skb;
1032 struct ieee80211_tx_info *info; 1123 struct ieee80211_tx_info *info;
1033 struct ieee80211_key *key = tx->key; 1124 struct ieee80211_key *key = tx->key;
1034 struct ieee80211_mmie_16 *mmie; 1125 struct ieee80211_mmie_16 *mmie;
1035 struct ieee80211_hdr *hdr; 1126 struct ieee80211_hdr *hdr;
1036 u8 aad[GMAC_AAD_LEN]; 1127 u8 aad[GMAC_AAD_LEN];
1037 u64 pn64; 1128 u64 pn64;
1038 u8 nonce[GMAC_NONCE_LEN]; 1129 u8 nonce[GMAC_NONCE_LEN];
1039 1130
1040 if (WARN_ON(skb_queue_len(&tx->skbs) 1131 if (WARN_ON(skb_queue_len(&tx->skbs) != 1))
1041 return TX_DROP; 1132 return TX_DROP;
1042 1133
1043 skb = skb_peek(&tx->skbs); 1134 skb = skb_peek(&tx->skbs);
1044 1135
1045 info = IEEE80211_SKB_CB(skb); 1136 info = IEEE80211_SKB_CB(skb);
1046 1137
1047 if (info->control.hw_key && !! 1138 if (info->control.hw_key)
1048 !(key->conf.flags & IEEE80211_KEY <<
1049 return TX_CONTINUE; 1139 return TX_CONTINUE;
1050 1140
1051 if (WARN_ON(skb_tailroom(skb) < sizeo 1141 if (WARN_ON(skb_tailroom(skb) < sizeof(*mmie)))
1052 return TX_DROP; 1142 return TX_DROP;
1053 1143
1054 mmie = skb_put(skb, sizeof(*mmie)); 1144 mmie = skb_put(skb, sizeof(*mmie));
1055 mmie->element_id = WLAN_EID_MMIE; 1145 mmie->element_id = WLAN_EID_MMIE;
1056 mmie->length = sizeof(*mmie) - 2; 1146 mmie->length = sizeof(*mmie) - 2;
1057 mmie->key_id = cpu_to_le16(key->conf. 1147 mmie->key_id = cpu_to_le16(key->conf.keyidx);
1058 1148
1059 /* PN = PN + 1 */ 1149 /* PN = PN + 1 */
1060 pn64 = atomic64_inc_return(&key->conf 1150 pn64 = atomic64_inc_return(&key->conf.tx_pn);
1061 1151
1062 bip_ipn_set64(mmie->sequence_number, 1152 bip_ipn_set64(mmie->sequence_number, pn64);
1063 1153
1064 if (info->control.hw_key) <<
1065 return TX_CONTINUE; <<
1066 <<
1067 bip_aad(skb, aad); 1154 bip_aad(skb, aad);
1068 1155
1069 hdr = (struct ieee80211_hdr *)skb->da 1156 hdr = (struct ieee80211_hdr *)skb->data;
1070 memcpy(nonce, hdr->addr2, ETH_ALEN); 1157 memcpy(nonce, hdr->addr2, ETH_ALEN);
1071 bip_ipn_swap(nonce + ETH_ALEN, mmie-> 1158 bip_ipn_swap(nonce + ETH_ALEN, mmie->sequence_number);
1072 1159
1073 /* MIC = AES-GMAC(IGTK, AAD || Manage 1160 /* MIC = AES-GMAC(IGTK, AAD || Management Frame Body || MMIE, 128) */
1074 if (ieee80211_aes_gmac(key->u.aes_gma 1161 if (ieee80211_aes_gmac(key->u.aes_gmac.tfm, aad, nonce,
1075 skb->data + 24 1162 skb->data + 24, skb->len - 24, mmie->mic) < 0)
1076 return TX_DROP; 1163 return TX_DROP;
1077 1164
1078 return TX_CONTINUE; 1165 return TX_CONTINUE;
1079 } 1166 }
1080 1167
1081 ieee80211_rx_result 1168 ieee80211_rx_result
1082 ieee80211_crypto_aes_gmac_decrypt(struct ieee 1169 ieee80211_crypto_aes_gmac_decrypt(struct ieee80211_rx_data *rx)
1083 { 1170 {
1084 struct sk_buff *skb = rx->skb; 1171 struct sk_buff *skb = rx->skb;
1085 struct ieee80211_rx_status *status = 1172 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
1086 struct ieee80211_key *key = rx->key; 1173 struct ieee80211_key *key = rx->key;
1087 struct ieee80211_mmie_16 *mmie; 1174 struct ieee80211_mmie_16 *mmie;
1088 u8 aad[GMAC_AAD_LEN], *mic, ipn[6], n 1175 u8 aad[GMAC_AAD_LEN], *mic, ipn[6], nonce[GMAC_NONCE_LEN];
1089 struct ieee80211_hdr *hdr = (struct i 1176 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
1090 1177
1091 if (!ieee80211_is_mgmt(hdr->frame_con 1178 if (!ieee80211_is_mgmt(hdr->frame_control))
1092 return RX_CONTINUE; 1179 return RX_CONTINUE;
1093 1180
1094 /* management frames are already line 1181 /* management frames are already linear */
1095 1182
1096 if (skb->len < 24 + sizeof(*mmie)) 1183 if (skb->len < 24 + sizeof(*mmie))
1097 return RX_DROP_U_SHORT_GMAC; !! 1184 return RX_DROP_UNUSABLE;
1098 1185
1099 mmie = (struct ieee80211_mmie_16 *) 1186 mmie = (struct ieee80211_mmie_16 *)
1100 (skb->data + skb->len - sizeo 1187 (skb->data + skb->len - sizeof(*mmie));
1101 if (mmie->element_id != WLAN_EID_MMIE 1188 if (mmie->element_id != WLAN_EID_MMIE ||
1102 mmie->length != sizeof(*mmie) - 2 1189 mmie->length != sizeof(*mmie) - 2)
1103 return RX_DROP_U_BAD_MMIE; /* !! 1190 return RX_DROP_UNUSABLE; /* Invalid MMIE */
1104 1191
1105 bip_ipn_swap(ipn, mmie->sequence_numb 1192 bip_ipn_swap(ipn, mmie->sequence_number);
1106 1193
1107 if (memcmp(ipn, key->u.aes_gmac.rx_pn 1194 if (memcmp(ipn, key->u.aes_gmac.rx_pn, 6) <= 0) {
1108 key->u.aes_gmac.replays++; 1195 key->u.aes_gmac.replays++;
1109 return RX_DROP_U_REPLAY; !! 1196 return RX_DROP_UNUSABLE;
1110 } 1197 }
1111 1198
1112 if (!(status->flag & RX_FLAG_DECRYPTE 1199 if (!(status->flag & RX_FLAG_DECRYPTED)) {
1113 /* hardware didn't decrypt/ve 1200 /* hardware didn't decrypt/verify MIC */
1114 bip_aad(skb, aad); 1201 bip_aad(skb, aad);
1115 1202
1116 memcpy(nonce, hdr->addr2, ETH 1203 memcpy(nonce, hdr->addr2, ETH_ALEN);
1117 memcpy(nonce + ETH_ALEN, ipn, 1204 memcpy(nonce + ETH_ALEN, ipn, 6);
1118 1205
1119 mic = kmalloc(GMAC_MIC_LEN, G 1206 mic = kmalloc(GMAC_MIC_LEN, GFP_ATOMIC);
1120 if (!mic) 1207 if (!mic)
1121 return RX_DROP_U_OOM; !! 1208 return RX_DROP_UNUSABLE;
1122 if (ieee80211_aes_gmac(key->u 1209 if (ieee80211_aes_gmac(key->u.aes_gmac.tfm, aad, nonce,
1123 skb->d 1210 skb->data + 24, skb->len - 24,
1124 mic) < 1211 mic) < 0 ||
1125 crypto_memneq(mic, mmie-> 1212 crypto_memneq(mic, mmie->mic, sizeof(mmie->mic))) {
1126 key->u.aes_gmac.icver 1213 key->u.aes_gmac.icverrors++;
1127 kfree(mic); 1214 kfree(mic);
1128 return RX_DROP_U_MIC_ !! 1215 return RX_DROP_UNUSABLE;
1129 } 1216 }
1130 kfree(mic); 1217 kfree(mic);
1131 } 1218 }
1132 1219
1133 memcpy(key->u.aes_gmac.rx_pn, ipn, 6) 1220 memcpy(key->u.aes_gmac.rx_pn, ipn, 6);
1134 1221
1135 /* Remove MMIE */ 1222 /* Remove MMIE */
1136 skb_trim(skb, skb->len - sizeof(*mmie 1223 skb_trim(skb, skb->len - sizeof(*mmie));
1137 1224
1138 return RX_CONTINUE; 1225 return RX_CONTINUE;
>> 1226 }
>> 1227
>> 1228 ieee80211_tx_result
>> 1229 ieee80211_crypto_hw_encrypt(struct ieee80211_tx_data *tx)
>> 1230 {
>> 1231 struct sk_buff *skb;
>> 1232 struct ieee80211_tx_info *info = NULL;
>> 1233 ieee80211_tx_result res;
>> 1234
>> 1235 skb_queue_walk(&tx->skbs, skb) {
>> 1236 info = IEEE80211_SKB_CB(skb);
>> 1237
>> 1238 /* handle hw-only algorithm */
>> 1239 if (!info->control.hw_key)
>> 1240 return TX_DROP;
>> 1241
>> 1242 if (tx->key->flags & KEY_FLAG_CIPHER_SCHEME) {
>> 1243 res = ieee80211_crypto_cs_encrypt(tx, skb);
>> 1244 if (res != TX_CONTINUE)
>> 1245 return res;
>> 1246 }
>> 1247 }
>> 1248
>> 1249 ieee80211_tx_set_protected(tx);
>> 1250
>> 1251 return TX_CONTINUE;
>> 1252 }
>> 1253
>> 1254 ieee80211_rx_result
>> 1255 ieee80211_crypto_hw_decrypt(struct ieee80211_rx_data *rx)
>> 1256 {
>> 1257 if (rx->sta && rx->sta->cipher_scheme)
>> 1258 return ieee80211_crypto_cs_decrypt(rx);
>> 1259
>> 1260 return RX_DROP_UNUSABLE;
1139 } 1261 }
1140 1262
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