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