1 // SPDX-License-Identifier: GPL-2.0-only <<
2 /* 1 /*
3 * Copyright 2002-2004, Instant802 Networks, I 2 * Copyright 2002-2004, Instant802 Networks, Inc.
4 * Copyright 2008, Jouni Malinen <j@w1.fi> 3 * Copyright 2008, Jouni Malinen <j@w1.fi>
5 * Copyright (C) 2016-2017 Intel Deutschland G !! 4 * Copyright (C) 2016 Intel Deutschland GmbH
6 * Copyright (C) 2020-2023 Intel Corporation !! 5 *
>> 6 * This program is free software; you can redistribute it and/or modify
>> 7 * it under the terms of the GNU General Public License version 2 as
>> 8 * published by the Free Software Foundation.
7 */ 9 */
8 10
9 #include <linux/netdevice.h> 11 #include <linux/netdevice.h>
10 #include <linux/types.h> 12 #include <linux/types.h>
11 #include <linux/skbuff.h> 13 #include <linux/skbuff.h>
12 #include <linux/compiler.h> 14 #include <linux/compiler.h>
13 #include <linux/ieee80211.h> 15 #include <linux/ieee80211.h>
14 #include <linux/gfp.h> 16 #include <linux/gfp.h>
15 #include <linux/unaligned.h> !! 17 #include <asm/unaligned.h>
16 #include <net/mac80211.h> 18 #include <net/mac80211.h>
17 #include <crypto/aes.h> 19 #include <crypto/aes.h>
18 #include <crypto/utils.h> !! 20 #include <crypto/algapi.h>
19 21
20 #include "ieee80211_i.h" 22 #include "ieee80211_i.h"
21 #include "michael.h" 23 #include "michael.h"
22 #include "tkip.h" 24 #include "tkip.h"
23 #include "aes_ccm.h" 25 #include "aes_ccm.h"
24 #include "aes_cmac.h" 26 #include "aes_cmac.h"
25 #include "aes_gmac.h" 27 #include "aes_gmac.h"
26 #include "aes_gcm.h" 28 #include "aes_gcm.h"
27 #include "wpa.h" 29 #include "wpa.h"
28 30
29 ieee80211_tx_result 31 ieee80211_tx_result
30 ieee80211_tx_h_michael_mic_add(struct ieee8021 32 ieee80211_tx_h_michael_mic_add(struct ieee80211_tx_data *tx)
31 { 33 {
32 u8 *data, *key, *mic; 34 u8 *data, *key, *mic;
33 size_t data_len; 35 size_t data_len;
34 unsigned int hdrlen; 36 unsigned int hdrlen;
35 struct ieee80211_hdr *hdr; 37 struct ieee80211_hdr *hdr;
36 struct sk_buff *skb = tx->skb; 38 struct sk_buff *skb = tx->skb;
37 struct ieee80211_tx_info *info = IEEE8 39 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
38 int tail; 40 int tail;
39 41
40 hdr = (struct ieee80211_hdr *)skb->dat 42 hdr = (struct ieee80211_hdr *)skb->data;
41 if (!tx->key || tx->key->conf.cipher ! 43 if (!tx->key || tx->key->conf.cipher != WLAN_CIPHER_SUITE_TKIP ||
42 skb->len < 24 || !ieee80211_is_dat 44 skb->len < 24 || !ieee80211_is_data_present(hdr->frame_control))
43 return TX_CONTINUE; 45 return TX_CONTINUE;
44 46
45 hdrlen = ieee80211_hdrlen(hdr->frame_c 47 hdrlen = ieee80211_hdrlen(hdr->frame_control);
46 if (skb->len < hdrlen) 48 if (skb->len < hdrlen)
47 return TX_DROP; 49 return TX_DROP;
48 50
49 data = skb->data + hdrlen; 51 data = skb->data + hdrlen;
50 data_len = skb->len - hdrlen; 52 data_len = skb->len - hdrlen;
51 53
52 if (unlikely(info->flags & IEEE80211_T 54 if (unlikely(info->flags & IEEE80211_TX_INTFL_TKIP_MIC_FAILURE)) {
53 /* Need to use software crypto 55 /* Need to use software crypto for the test */
54 info->control.hw_key = NULL; 56 info->control.hw_key = NULL;
55 } 57 }
56 58
57 if (info->control.hw_key && 59 if (info->control.hw_key &&
58 (info->flags & IEEE80211_TX_CTL_DO 60 (info->flags & IEEE80211_TX_CTL_DONTFRAG ||
59 ieee80211_hw_check(&tx->local->hw 61 ieee80211_hw_check(&tx->local->hw, SUPPORTS_TX_FRAG)) &&
60 !(tx->key->conf.flags & (IEEE80211 !! 62 !(tx->key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_MMIC)) {
61 IEEE80211 !! 63 /* hwaccel - with no need for SW-generated MMIC */
62 /* hwaccel - with no need for <<
63 return TX_CONTINUE; 64 return TX_CONTINUE;
64 } 65 }
65 66
66 tail = MICHAEL_MIC_LEN; 67 tail = MICHAEL_MIC_LEN;
67 if (!info->control.hw_key) 68 if (!info->control.hw_key)
68 tail += IEEE80211_TKIP_ICV_LEN 69 tail += IEEE80211_TKIP_ICV_LEN;
69 70
70 if (WARN(skb_tailroom(skb) < tail || 71 if (WARN(skb_tailroom(skb) < tail ||
71 skb_headroom(skb) < IEEE80211 72 skb_headroom(skb) < IEEE80211_TKIP_IV_LEN,
72 "mmic: not enough head/tail ( 73 "mmic: not enough head/tail (%d/%d,%d/%d)\n",
73 skb_headroom(skb), IEEE80211_ 74 skb_headroom(skb), IEEE80211_TKIP_IV_LEN,
74 skb_tailroom(skb), tail)) 75 skb_tailroom(skb), tail))
75 return TX_DROP; 76 return TX_DROP;
76 77
77 mic = skb_put(skb, MICHAEL_MIC_LEN); <<
78 <<
79 if (tx->key->conf.flags & IEEE80211_KE <<
80 /* Zeroed MIC can help with de <<
81 memset(mic, 0, MICHAEL_MIC_LEN <<
82 return TX_CONTINUE; <<
83 } <<
84 <<
85 key = &tx->key->conf.key[NL80211_TKIP_ 78 key = &tx->key->conf.key[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY];
>> 79 mic = skb_put(skb, MICHAEL_MIC_LEN);
86 michael_mic(key, hdr, data, data_len, 80 michael_mic(key, hdr, data, data_len, mic);
87 if (unlikely(info->flags & IEEE80211_T 81 if (unlikely(info->flags & IEEE80211_TX_INTFL_TKIP_MIC_FAILURE))
88 mic[0]++; 82 mic[0]++;
89 83
90 return TX_CONTINUE; 84 return TX_CONTINUE;
91 } 85 }
92 86
93 87
94 ieee80211_rx_result 88 ieee80211_rx_result
95 ieee80211_rx_h_michael_mic_verify(struct ieee8 89 ieee80211_rx_h_michael_mic_verify(struct ieee80211_rx_data *rx)
96 { 90 {
97 u8 *data, *key = NULL; 91 u8 *data, *key = NULL;
98 size_t data_len; 92 size_t data_len;
99 unsigned int hdrlen; 93 unsigned int hdrlen;
100 u8 mic[MICHAEL_MIC_LEN]; 94 u8 mic[MICHAEL_MIC_LEN];
101 struct sk_buff *skb = rx->skb; 95 struct sk_buff *skb = rx->skb;
102 struct ieee80211_rx_status *status = I 96 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
103 struct ieee80211_hdr *hdr = (struct ie 97 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
104 98
105 /* 99 /*
106 * it makes no sense to check for MIC 100 * it makes no sense to check for MIC errors on anything other
107 * than data frames. 101 * than data frames.
108 */ 102 */
109 if (!ieee80211_is_data_present(hdr->fr 103 if (!ieee80211_is_data_present(hdr->frame_control))
110 return RX_CONTINUE; 104 return RX_CONTINUE;
111 105
112 /* 106 /*
113 * No way to verify the MIC if the har 107 * No way to verify the MIC if the hardware stripped it or
114 * the IV with the key index. In this 108 * the IV with the key index. In this case we have solely rely
115 * on the driver to set RX_FLAG_MMIC_E 109 * on the driver to set RX_FLAG_MMIC_ERROR in the event of a
116 * MIC failure report. 110 * MIC failure report.
117 */ 111 */
118 if (status->flag & (RX_FLAG_MMIC_STRIP 112 if (status->flag & (RX_FLAG_MMIC_STRIPPED | RX_FLAG_IV_STRIPPED)) {
119 if (status->flag & RX_FLAG_MMI 113 if (status->flag & RX_FLAG_MMIC_ERROR)
120 goto mic_fail_no_key; 114 goto mic_fail_no_key;
121 115
122 if (!(status->flag & RX_FLAG_I 116 if (!(status->flag & RX_FLAG_IV_STRIPPED) && rx->key &&
123 rx->key->conf.cipher == WL 117 rx->key->conf.cipher == WLAN_CIPHER_SUITE_TKIP)
124 goto update_iv; 118 goto update_iv;
125 119
126 return RX_CONTINUE; 120 return RX_CONTINUE;
127 } 121 }
128 122
129 /* 123 /*
130 * Some hardware seems to generate Mic 124 * Some hardware seems to generate Michael MIC failure reports; even
131 * though, the frame was not encrypted 125 * though, the frame was not encrypted with TKIP and therefore has no
132 * MIC. Ignore the flag them to avoid 126 * MIC. Ignore the flag them to avoid triggering countermeasures.
133 */ 127 */
134 if (!rx->key || rx->key->conf.cipher ! 128 if (!rx->key || rx->key->conf.cipher != WLAN_CIPHER_SUITE_TKIP ||
135 !(status->flag & RX_FLAG_DECRYPTED 129 !(status->flag & RX_FLAG_DECRYPTED))
136 return RX_CONTINUE; 130 return RX_CONTINUE;
137 131
138 if (rx->sdata->vif.type == NL80211_IFT 132 if (rx->sdata->vif.type == NL80211_IFTYPE_AP && rx->key->conf.keyidx) {
139 /* 133 /*
140 * APs with pairwise keys shou 134 * APs with pairwise keys should never receive Michael MIC
141 * errors for non-zero keyidx 135 * errors for non-zero keyidx because these are reserved for
142 * group keys and only the AP 136 * group keys and only the AP is sending real multicast
143 * frames in the BSS. 137 * frames in the BSS.
144 */ 138 */
145 return RX_DROP_U_AP_RX_GROUPCA !! 139 return RX_DROP_UNUSABLE;
146 } 140 }
147 141
148 if (status->flag & RX_FLAG_MMIC_ERROR) 142 if (status->flag & RX_FLAG_MMIC_ERROR)
149 goto mic_fail; 143 goto mic_fail;
150 144
151 hdrlen = ieee80211_hdrlen(hdr->frame_c 145 hdrlen = ieee80211_hdrlen(hdr->frame_control);
152 if (skb->len < hdrlen + MICHAEL_MIC_LE 146 if (skb->len < hdrlen + MICHAEL_MIC_LEN)
153 return RX_DROP_U_SHORT_MMIC; !! 147 return RX_DROP_UNUSABLE;
154 148
155 if (skb_linearize(rx->skb)) 149 if (skb_linearize(rx->skb))
156 return RX_DROP_U_OOM; !! 150 return RX_DROP_UNUSABLE;
157 hdr = (void *)skb->data; 151 hdr = (void *)skb->data;
158 152
159 data = skb->data + hdrlen; 153 data = skb->data + hdrlen;
160 data_len = skb->len - hdrlen - MICHAEL 154 data_len = skb->len - hdrlen - MICHAEL_MIC_LEN;
161 key = &rx->key->conf.key[NL80211_TKIP_ 155 key = &rx->key->conf.key[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY];
162 michael_mic(key, hdr, data, data_len, 156 michael_mic(key, hdr, data, data_len, mic);
163 if (crypto_memneq(mic, data + data_len 157 if (crypto_memneq(mic, data + data_len, MICHAEL_MIC_LEN))
164 goto mic_fail; 158 goto mic_fail;
165 159
166 /* remove Michael MIC from payload */ 160 /* remove Michael MIC from payload */
167 skb_trim(skb, skb->len - MICHAEL_MIC_L 161 skb_trim(skb, skb->len - MICHAEL_MIC_LEN);
168 162
169 update_iv: 163 update_iv:
170 /* update IV in key information to be 164 /* update IV in key information to be able to detect replays */
171 rx->key->u.tkip.rx[rx->security_idx].i !! 165 rx->key->u.tkip.rx[rx->security_idx].iv32 = rx->tkip_iv32;
172 rx->key->u.tkip.rx[rx->security_idx].i !! 166 rx->key->u.tkip.rx[rx->security_idx].iv16 = rx->tkip_iv16;
173 167
174 return RX_CONTINUE; 168 return RX_CONTINUE;
175 169
176 mic_fail: 170 mic_fail:
177 rx->key->u.tkip.mic_failures++; 171 rx->key->u.tkip.mic_failures++;
178 172
179 mic_fail_no_key: 173 mic_fail_no_key:
180 /* 174 /*
181 * In some cases the key can be unset 175 * In some cases the key can be unset - e.g. a multicast packet, in
182 * a driver that supports HW encryptio 176 * a driver that supports HW encryption. Send up the key idx only if
183 * the key is set. 177 * the key is set.
184 */ 178 */
185 cfg80211_michael_mic_failure(rx->sdata 179 cfg80211_michael_mic_failure(rx->sdata->dev, hdr->addr2,
186 is_multic 180 is_multicast_ether_addr(hdr->addr1) ?
187 NL80211_K 181 NL80211_KEYTYPE_GROUP :
188 NL80211_K 182 NL80211_KEYTYPE_PAIRWISE,
189 rx->key ? 183 rx->key ? rx->key->conf.keyidx : -1,
190 NULL, GFP 184 NULL, GFP_ATOMIC);
191 return RX_DROP_U_MMIC_FAIL; !! 185 return RX_DROP_UNUSABLE;
192 } 186 }
193 187
194 static int tkip_encrypt_skb(struct ieee80211_t 188 static int tkip_encrypt_skb(struct ieee80211_tx_data *tx, struct sk_buff *skb)
195 { 189 {
196 struct ieee80211_hdr *hdr = (struct ie 190 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
197 struct ieee80211_key *key = tx->key; 191 struct ieee80211_key *key = tx->key;
198 struct ieee80211_tx_info *info = IEEE8 192 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
199 unsigned int hdrlen; 193 unsigned int hdrlen;
200 int len, tail; 194 int len, tail;
201 u64 pn; 195 u64 pn;
202 u8 *pos; 196 u8 *pos;
203 197
204 if (info->control.hw_key && 198 if (info->control.hw_key &&
205 !(info->control.hw_key->flags & IE 199 !(info->control.hw_key->flags & IEEE80211_KEY_FLAG_GENERATE_IV) &&
206 !(info->control.hw_key->flags & IE 200 !(info->control.hw_key->flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE)) {
207 /* hwaccel - with no need for 201 /* hwaccel - with no need for software-generated IV */
208 return 0; 202 return 0;
209 } 203 }
210 204
211 hdrlen = ieee80211_hdrlen(hdr->frame_c 205 hdrlen = ieee80211_hdrlen(hdr->frame_control);
212 len = skb->len - hdrlen; 206 len = skb->len - hdrlen;
213 207
214 if (info->control.hw_key) 208 if (info->control.hw_key)
215 tail = 0; 209 tail = 0;
216 else 210 else
217 tail = IEEE80211_TKIP_ICV_LEN; 211 tail = IEEE80211_TKIP_ICV_LEN;
218 212
219 if (WARN_ON(skb_tailroom(skb) < tail | 213 if (WARN_ON(skb_tailroom(skb) < tail ||
220 skb_headroom(skb) < IEEE80 214 skb_headroom(skb) < IEEE80211_TKIP_IV_LEN))
221 return -1; 215 return -1;
222 216
223 pos = skb_push(skb, IEEE80211_TKIP_IV_ 217 pos = skb_push(skb, IEEE80211_TKIP_IV_LEN);
224 memmove(pos, pos + IEEE80211_TKIP_IV_L 218 memmove(pos, pos + IEEE80211_TKIP_IV_LEN, hdrlen);
225 pos += hdrlen; 219 pos += hdrlen;
226 220
227 /* the HW only needs room for the IV, 221 /* the HW only needs room for the IV, but not the actual IV */
228 if (info->control.hw_key && 222 if (info->control.hw_key &&
229 (info->control.hw_key->flags & IEE 223 (info->control.hw_key->flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE))
230 return 0; 224 return 0;
231 225
232 /* Increase IV for the frame */ 226 /* Increase IV for the frame */
233 pn = atomic64_inc_return(&key->conf.tx 227 pn = atomic64_inc_return(&key->conf.tx_pn);
234 pos = ieee80211_tkip_add_iv(pos, &key- 228 pos = ieee80211_tkip_add_iv(pos, &key->conf, pn);
235 229
236 /* hwaccel - with software IV */ 230 /* hwaccel - with software IV */
237 if (info->control.hw_key) 231 if (info->control.hw_key)
238 return 0; 232 return 0;
239 233
240 /* Add room for ICV */ 234 /* Add room for ICV */
241 skb_put(skb, IEEE80211_TKIP_ICV_LEN); 235 skb_put(skb, IEEE80211_TKIP_ICV_LEN);
242 236
243 return ieee80211_tkip_encrypt_data(&tx !! 237 return ieee80211_tkip_encrypt_data(tx->local->wep_tx_tfm,
244 key 238 key, skb, pos, len);
245 } 239 }
246 240
247 241
248 ieee80211_tx_result 242 ieee80211_tx_result
249 ieee80211_crypto_tkip_encrypt(struct ieee80211 243 ieee80211_crypto_tkip_encrypt(struct ieee80211_tx_data *tx)
250 { 244 {
251 struct sk_buff *skb; 245 struct sk_buff *skb;
252 246
253 ieee80211_tx_set_protected(tx); 247 ieee80211_tx_set_protected(tx);
254 248
255 skb_queue_walk(&tx->skbs, skb) { 249 skb_queue_walk(&tx->skbs, skb) {
256 if (tkip_encrypt_skb(tx, skb) 250 if (tkip_encrypt_skb(tx, skb) < 0)
257 return TX_DROP; 251 return TX_DROP;
258 } 252 }
259 253
260 return TX_CONTINUE; 254 return TX_CONTINUE;
261 } 255 }
262 256
263 257
264 ieee80211_rx_result 258 ieee80211_rx_result
265 ieee80211_crypto_tkip_decrypt(struct ieee80211 259 ieee80211_crypto_tkip_decrypt(struct ieee80211_rx_data *rx)
266 { 260 {
267 struct ieee80211_hdr *hdr = (struct ie 261 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) rx->skb->data;
268 int hdrlen, res, hwaccel = 0; 262 int hdrlen, res, hwaccel = 0;
269 struct ieee80211_key *key = rx->key; 263 struct ieee80211_key *key = rx->key;
270 struct sk_buff *skb = rx->skb; 264 struct sk_buff *skb = rx->skb;
271 struct ieee80211_rx_status *status = I 265 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
272 266
273 hdrlen = ieee80211_hdrlen(hdr->frame_c 267 hdrlen = ieee80211_hdrlen(hdr->frame_control);
274 268
275 if (!ieee80211_is_data(hdr->frame_cont 269 if (!ieee80211_is_data(hdr->frame_control))
276 return RX_CONTINUE; 270 return RX_CONTINUE;
277 271
278 if (!rx->sta || skb->len - hdrlen < 12 272 if (!rx->sta || skb->len - hdrlen < 12)
279 return RX_DROP_U_SHORT_TKIP; !! 273 return RX_DROP_UNUSABLE;
280 274
281 /* it may be possible to optimize this 275 /* it may be possible to optimize this a bit more */
282 if (skb_linearize(rx->skb)) 276 if (skb_linearize(rx->skb))
283 return RX_DROP_U_OOM; !! 277 return RX_DROP_UNUSABLE;
284 hdr = (void *)skb->data; 278 hdr = (void *)skb->data;
285 279
286 /* 280 /*
287 * Let TKIP code verify IV, but skip d 281 * Let TKIP code verify IV, but skip decryption.
288 * In the case where hardware checks t 282 * In the case where hardware checks the IV as well,
289 * we don't even get here, see ieee802 283 * we don't even get here, see ieee80211_rx_h_decrypt()
290 */ 284 */
291 if (status->flag & RX_FLAG_DECRYPTED) 285 if (status->flag & RX_FLAG_DECRYPTED)
292 hwaccel = 1; 286 hwaccel = 1;
293 287
294 res = ieee80211_tkip_decrypt_data(&rx- !! 288 res = ieee80211_tkip_decrypt_data(rx->local->wep_rx_tfm,
295 key, 289 key, skb->data + hdrlen,
296 skb- 290 skb->len - hdrlen, rx->sta->sta.addr,
297 hdr- 291 hdr->addr1, hwaccel, rx->security_idx,
298 &rx- !! 292 &rx->tkip_iv32,
299 &rx- !! 293 &rx->tkip_iv16);
300 if (res != TKIP_DECRYPT_OK) 294 if (res != TKIP_DECRYPT_OK)
301 return RX_DROP_U_TKIP_FAIL; !! 295 return RX_DROP_UNUSABLE;
302 296
303 /* Trim ICV */ 297 /* Trim ICV */
304 if (!(status->flag & RX_FLAG_ICV_STRIP 298 if (!(status->flag & RX_FLAG_ICV_STRIPPED))
305 skb_trim(skb, skb->len - IEEE8 299 skb_trim(skb, skb->len - IEEE80211_TKIP_ICV_LEN);
306 300
307 /* Remove IV */ 301 /* Remove IV */
308 memmove(skb->data + IEEE80211_TKIP_IV_ 302 memmove(skb->data + IEEE80211_TKIP_IV_LEN, skb->data, hdrlen);
309 skb_pull(skb, IEEE80211_TKIP_IV_LEN); 303 skb_pull(skb, IEEE80211_TKIP_IV_LEN);
310 304
311 return RX_CONTINUE; 305 return RX_CONTINUE;
312 } 306 }
313 307
314 /* !! 308
315 * Calculate AAD for CCMP/GCMP, returning qos_ !! 309 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 { 310 {
320 struct ieee80211_hdr *hdr = (void *)sk <<
321 __le16 mask_fc; 311 __le16 mask_fc;
322 int a4_included, mgmt; 312 int a4_included, mgmt;
323 u8 qos_tid; 313 u8 qos_tid;
324 u16 len_a = 22; !! 314 u16 len_a;
>> 315 unsigned int hdrlen;
>> 316 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
325 317
326 /* 318 /*
327 * Mask FC: zero subtype b4 b5 b6 (if 319 * Mask FC: zero subtype b4 b5 b6 (if not mgmt)
328 * Retry, PwrMgt, MoreData, Order (if !! 320 * Retry, PwrMgt, MoreData; set Protected
329 */ 321 */
330 mgmt = ieee80211_is_mgmt(hdr->frame_co 322 mgmt = ieee80211_is_mgmt(hdr->frame_control);
331 mask_fc = hdr->frame_control; 323 mask_fc = hdr->frame_control;
332 mask_fc &= ~cpu_to_le16(IEEE80211_FCTL 324 mask_fc &= ~cpu_to_le16(IEEE80211_FCTL_RETRY |
333 IEEE80211_FCTL 325 IEEE80211_FCTL_PM | IEEE80211_FCTL_MOREDATA);
334 if (!mgmt) 326 if (!mgmt)
335 mask_fc &= ~cpu_to_le16(0x0070 327 mask_fc &= ~cpu_to_le16(0x0070);
336 mask_fc |= cpu_to_le16(IEEE80211_FCTL_ 328 mask_fc |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
337 329
>> 330 hdrlen = ieee80211_hdrlen(hdr->frame_control);
>> 331 len_a = hdrlen - 2;
338 a4_included = ieee80211_has_a4(hdr->fr 332 a4_included = ieee80211_has_a4(hdr->frame_control);
339 if (a4_included) <<
340 len_a += 6; <<
341 333
342 if (ieee80211_is_data_qos(hdr->frame_c !! 334 if (ieee80211_is_data_qos(hdr->frame_control))
343 qos_tid = *ieee80211_get_qos_c !! 335 qos_tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK;
>> 336 else
>> 337 qos_tid = 0;
344 338
345 if (spp_amsdu) !! 339 /* In CCM, the initial vectors (IV) used for CTR mode encryption and CBC
346 qos_tid &= IEEE80211_Q !! 340 * mode authentication are not allowed to collide, yet both are derived
347 IEEE80211_Q !! 341 * from this vector b_0. We only set L := 1 here to indicate that the
348 else !! 342 * data size can be represented in (L+1) bytes. The CCM layer will take
349 qos_tid &= IEEE80211_Q !! 343 * care of storing the data length in the top (L+1) bytes and setting
>> 344 * and clearing the other bits as is required to derive the two IVs.
>> 345 */
>> 346 b_0[0] = 0x1;
350 347
351 mask_fc &= ~cpu_to_le16(IEEE80 !! 348 /* Nonce: Nonce Flags | A2 | PN
352 len_a += 2; !! 349 * Nonce Flags: Priority (b0..b3) | Management (b4) | Reserved (b5..b7)
353 } else { !! 350 */
354 qos_tid = 0; !! 351 b_0[1] = qos_tid | (mgmt << 4);
355 } !! 352 memcpy(&b_0[2], hdr->addr2, ETH_ALEN);
>> 353 memcpy(&b_0[8], pn, IEEE80211_CCMP_PN_LEN);
356 354
357 /* AAD (extra authenticate-only data) 355 /* AAD (extra authenticate-only data) / masked 802.11 header
358 * FC | A1 | A2 | A3 | SC | [A4] | [QC 356 * FC | A1 | A2 | A3 | SC | [A4] | [QC] */
359 put_unaligned_be16(len_a, &aad[0]); 357 put_unaligned_be16(len_a, &aad[0]);
360 put_unaligned(mask_fc, (__le16 *)&aad[ 358 put_unaligned(mask_fc, (__le16 *)&aad[2]);
361 memcpy(&aad[4], &hdr->addrs, 3 * ETH_A !! 359 memcpy(&aad[4], &hdr->addr1, 3 * ETH_ALEN);
362 360
363 /* Mask Seq#, leave Frag# */ 361 /* Mask Seq#, leave Frag# */
364 aad[22] = *((u8 *) &hdr->seq_ctrl) & 0 362 aad[22] = *((u8 *) &hdr->seq_ctrl) & 0x0f;
365 aad[23] = 0; 363 aad[23] = 0;
366 364
367 if (a4_included) { 365 if (a4_included) {
368 memcpy(&aad[24], hdr->addr4, E 366 memcpy(&aad[24], hdr->addr4, ETH_ALEN);
369 aad[30] = qos_tid; 367 aad[30] = qos_tid;
370 aad[31] = 0; 368 aad[31] = 0;
371 } else { 369 } else {
372 memset(&aad[24], 0, ETH_ALEN + 370 memset(&aad[24], 0, ETH_ALEN + IEEE80211_QOS_CTL_LEN);
373 aad[24] = qos_tid; 371 aad[24] = qos_tid;
374 } 372 }
375 <<
376 return qos_tid; <<
377 } 373 }
378 374
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 } <<
401 375
402 static inline void ccmp_pn2hdr(u8 *hdr, u8 *pn 376 static inline void ccmp_pn2hdr(u8 *hdr, u8 *pn, int key_id)
403 { 377 {
404 hdr[0] = pn[5]; 378 hdr[0] = pn[5];
405 hdr[1] = pn[4]; 379 hdr[1] = pn[4];
406 hdr[2] = 0; 380 hdr[2] = 0;
407 hdr[3] = 0x20 | (key_id << 6); 381 hdr[3] = 0x20 | (key_id << 6);
408 hdr[4] = pn[3]; 382 hdr[4] = pn[3];
409 hdr[5] = pn[2]; 383 hdr[5] = pn[2];
410 hdr[6] = pn[1]; 384 hdr[6] = pn[1];
411 hdr[7] = pn[0]; 385 hdr[7] = pn[0];
412 } 386 }
413 387
414 388
415 static inline void ccmp_hdr2pn(u8 *pn, u8 *hdr 389 static inline void ccmp_hdr2pn(u8 *pn, u8 *hdr)
416 { 390 {
417 pn[0] = hdr[7]; 391 pn[0] = hdr[7];
418 pn[1] = hdr[6]; 392 pn[1] = hdr[6];
419 pn[2] = hdr[5]; 393 pn[2] = hdr[5];
420 pn[3] = hdr[4]; 394 pn[3] = hdr[4];
421 pn[4] = hdr[1]; 395 pn[4] = hdr[1];
422 pn[5] = hdr[0]; 396 pn[5] = hdr[0];
423 } 397 }
424 398
425 399
426 static int ccmp_encrypt_skb(struct ieee80211_t 400 static int ccmp_encrypt_skb(struct ieee80211_tx_data *tx, struct sk_buff *skb,
427 unsigned int mic_l 401 unsigned int mic_len)
428 { 402 {
429 struct ieee80211_hdr *hdr = (struct ie 403 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
430 struct ieee80211_key *key = tx->key; 404 struct ieee80211_key *key = tx->key;
431 struct ieee80211_tx_info *info = IEEE8 405 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
432 int hdrlen, len, tail; 406 int hdrlen, len, tail;
433 u8 *pos; 407 u8 *pos;
434 u8 pn[6]; 408 u8 pn[6];
435 u64 pn64; 409 u64 pn64;
436 u8 aad[CCM_AAD_LEN]; 410 u8 aad[CCM_AAD_LEN];
437 u8 b_0[AES_BLOCK_SIZE]; 411 u8 b_0[AES_BLOCK_SIZE];
438 412
439 if (info->control.hw_key && 413 if (info->control.hw_key &&
440 !(info->control.hw_key->flags & IE 414 !(info->control.hw_key->flags & IEEE80211_KEY_FLAG_GENERATE_IV) &&
441 !(info->control.hw_key->flags & IE 415 !(info->control.hw_key->flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE) &&
442 !((info->control.hw_key->flags & 416 !((info->control.hw_key->flags &
443 IEEE80211_KEY_FLAG_GENERATE_IV_ 417 IEEE80211_KEY_FLAG_GENERATE_IV_MGMT) &&
444 ieee80211_is_mgmt(hdr->frame_con 418 ieee80211_is_mgmt(hdr->frame_control))) {
445 /* 419 /*
446 * hwaccel has no need for pre 420 * hwaccel has no need for preallocated room for CCMP
447 * header or MIC fields 421 * header or MIC fields
448 */ 422 */
449 return 0; 423 return 0;
450 } 424 }
451 425
452 hdrlen = ieee80211_hdrlen(hdr->frame_c 426 hdrlen = ieee80211_hdrlen(hdr->frame_control);
453 len = skb->len - hdrlen; 427 len = skb->len - hdrlen;
454 428
455 if (info->control.hw_key) 429 if (info->control.hw_key)
456 tail = 0; 430 tail = 0;
457 else 431 else
458 tail = mic_len; 432 tail = mic_len;
459 433
460 if (WARN_ON(skb_tailroom(skb) < tail | 434 if (WARN_ON(skb_tailroom(skb) < tail ||
461 skb_headroom(skb) < IEEE80 435 skb_headroom(skb) < IEEE80211_CCMP_HDR_LEN))
462 return -1; 436 return -1;
463 437
464 pos = skb_push(skb, IEEE80211_CCMP_HDR 438 pos = skb_push(skb, IEEE80211_CCMP_HDR_LEN);
465 memmove(pos, pos + IEEE80211_CCMP_HDR_ 439 memmove(pos, pos + IEEE80211_CCMP_HDR_LEN, hdrlen);
466 440
467 /* the HW only needs room for the IV, 441 /* the HW only needs room for the IV, but not the actual IV */
468 if (info->control.hw_key && 442 if (info->control.hw_key &&
469 (info->control.hw_key->flags & IEE 443 (info->control.hw_key->flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE))
470 return 0; 444 return 0;
471 445
>> 446 hdr = (struct ieee80211_hdr *) pos;
472 pos += hdrlen; 447 pos += hdrlen;
473 448
474 pn64 = atomic64_inc_return(&key->conf. 449 pn64 = atomic64_inc_return(&key->conf.tx_pn);
475 450
476 pn[5] = pn64; 451 pn[5] = pn64;
477 pn[4] = pn64 >> 8; 452 pn[4] = pn64 >> 8;
478 pn[3] = pn64 >> 16; 453 pn[3] = pn64 >> 16;
479 pn[2] = pn64 >> 24; 454 pn[2] = pn64 >> 24;
480 pn[1] = pn64 >> 32; 455 pn[1] = pn64 >> 32;
481 pn[0] = pn64 >> 40; 456 pn[0] = pn64 >> 40;
482 457
483 ccmp_pn2hdr(pos, pn, key->conf.keyidx) 458 ccmp_pn2hdr(pos, pn, key->conf.keyidx);
484 459
485 /* hwaccel - with software CCMP header 460 /* hwaccel - with software CCMP header */
486 if (info->control.hw_key) 461 if (info->control.hw_key)
487 return 0; 462 return 0;
488 463
489 pos += IEEE80211_CCMP_HDR_LEN; 464 pos += IEEE80211_CCMP_HDR_LEN;
490 ccmp_special_blocks(skb, pn, b_0, aad, !! 465 ccmp_special_blocks(skb, pn, b_0, aad);
491 key->conf.flags & <<
492 return ieee80211_aes_ccm_encrypt(key-> 466 return ieee80211_aes_ccm_encrypt(key->u.ccmp.tfm, b_0, aad, pos, len,
493 skb_p 467 skb_put(skb, mic_len));
494 } 468 }
495 469
496 470
497 ieee80211_tx_result 471 ieee80211_tx_result
498 ieee80211_crypto_ccmp_encrypt(struct ieee80211 472 ieee80211_crypto_ccmp_encrypt(struct ieee80211_tx_data *tx,
499 unsigned int mic 473 unsigned int mic_len)
500 { 474 {
501 struct sk_buff *skb; 475 struct sk_buff *skb;
502 476
503 ieee80211_tx_set_protected(tx); 477 ieee80211_tx_set_protected(tx);
504 478
505 skb_queue_walk(&tx->skbs, skb) { 479 skb_queue_walk(&tx->skbs, skb) {
506 if (ccmp_encrypt_skb(tx, skb, 480 if (ccmp_encrypt_skb(tx, skb, mic_len) < 0)
507 return TX_DROP; 481 return TX_DROP;
508 } 482 }
509 483
510 return TX_CONTINUE; 484 return TX_CONTINUE;
511 } 485 }
512 486
513 487
514 ieee80211_rx_result 488 ieee80211_rx_result
515 ieee80211_crypto_ccmp_decrypt(struct ieee80211 489 ieee80211_crypto_ccmp_decrypt(struct ieee80211_rx_data *rx,
516 unsigned int mic 490 unsigned int mic_len)
517 { 491 {
518 struct ieee80211_hdr *hdr = (struct ie 492 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data;
519 int hdrlen; 493 int hdrlen;
520 struct ieee80211_key *key = rx->key; 494 struct ieee80211_key *key = rx->key;
521 struct sk_buff *skb = rx->skb; 495 struct sk_buff *skb = rx->skb;
522 struct ieee80211_rx_status *status = I 496 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
523 u8 pn[IEEE80211_CCMP_PN_LEN]; 497 u8 pn[IEEE80211_CCMP_PN_LEN];
524 int data_len; 498 int data_len;
525 int queue; 499 int queue;
526 500
527 hdrlen = ieee80211_hdrlen(hdr->frame_c 501 hdrlen = ieee80211_hdrlen(hdr->frame_control);
528 502
529 if (!ieee80211_is_data(hdr->frame_cont 503 if (!ieee80211_is_data(hdr->frame_control) &&
530 !ieee80211_is_robust_mgmt_frame(sk 504 !ieee80211_is_robust_mgmt_frame(skb))
531 return RX_CONTINUE; 505 return RX_CONTINUE;
532 506
533 if (status->flag & RX_FLAG_DECRYPTED) 507 if (status->flag & RX_FLAG_DECRYPTED) {
534 if (!pskb_may_pull(rx->skb, hd 508 if (!pskb_may_pull(rx->skb, hdrlen + IEEE80211_CCMP_HDR_LEN))
535 return RX_DROP_U_SHORT !! 509 return RX_DROP_UNUSABLE;
536 if (status->flag & RX_FLAG_MIC 510 if (status->flag & RX_FLAG_MIC_STRIPPED)
537 mic_len = 0; 511 mic_len = 0;
538 } else { 512 } else {
539 if (skb_linearize(rx->skb)) 513 if (skb_linearize(rx->skb))
540 return RX_DROP_U_OOM; !! 514 return RX_DROP_UNUSABLE;
541 } 515 }
542 516
543 /* reload hdr - skb might have been re <<
544 hdr = (void *)rx->skb->data; <<
545 <<
546 data_len = skb->len - hdrlen - IEEE802 517 data_len = skb->len - hdrlen - IEEE80211_CCMP_HDR_LEN - mic_len;
547 if (!rx->sta || data_len < 0) 518 if (!rx->sta || data_len < 0)
548 return RX_DROP_U_SHORT_CCMP; !! 519 return RX_DROP_UNUSABLE;
549 520
550 if (!(status->flag & RX_FLAG_PN_VALIDA 521 if (!(status->flag & RX_FLAG_PN_VALIDATED)) {
551 int res; 522 int res;
552 523
553 ccmp_hdr2pn(pn, skb->data + hd 524 ccmp_hdr2pn(pn, skb->data + hdrlen);
554 525
555 queue = rx->security_idx; 526 queue = rx->security_idx;
556 527
557 res = memcmp(pn, key->u.ccmp.r 528 res = memcmp(pn, key->u.ccmp.rx_pn[queue],
558 IEEE80211_CCMP_PN 529 IEEE80211_CCMP_PN_LEN);
559 if (res < 0 || 530 if (res < 0 ||
560 (!res && !(status->flag & 531 (!res && !(status->flag & RX_FLAG_ALLOW_SAME_PN))) {
561 key->u.ccmp.replays++; 532 key->u.ccmp.replays++;
562 return RX_DROP_U_REPLA !! 533 return RX_DROP_UNUSABLE;
563 } 534 }
564 535
565 if (!(status->flag & RX_FLAG_D 536 if (!(status->flag & RX_FLAG_DECRYPTED)) {
566 u8 aad[2 * AES_BLOCK_S 537 u8 aad[2 * AES_BLOCK_SIZE];
567 u8 b_0[AES_BLOCK_SIZE] 538 u8 b_0[AES_BLOCK_SIZE];
568 /* hardware didn't dec 539 /* hardware didn't decrypt/verify MIC */
569 ccmp_special_blocks(sk !! 540 ccmp_special_blocks(skb, pn, b_0, aad);
570 ke <<
571 541
572 if (ieee80211_aes_ccm_ 542 if (ieee80211_aes_ccm_decrypt(
573 key->u.ccm 543 key->u.ccmp.tfm, b_0, aad,
574 skb->data 544 skb->data + hdrlen + IEEE80211_CCMP_HDR_LEN,
575 data_len, 545 data_len,
576 skb->data 546 skb->data + skb->len - mic_len))
577 return RX_DROP !! 547 return RX_DROP_UNUSABLE;
578 } 548 }
579 549
580 memcpy(key->u.ccmp.rx_pn[queue 550 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 } 551 }
584 552
585 /* Remove CCMP header and MIC */ 553 /* Remove CCMP header and MIC */
586 if (pskb_trim(skb, skb->len - mic_len) 554 if (pskb_trim(skb, skb->len - mic_len))
587 return RX_DROP_U_SHORT_CCMP_MI !! 555 return RX_DROP_UNUSABLE;
588 memmove(skb->data + IEEE80211_CCMP_HDR 556 memmove(skb->data + IEEE80211_CCMP_HDR_LEN, skb->data, hdrlen);
589 skb_pull(skb, IEEE80211_CCMP_HDR_LEN); 557 skb_pull(skb, IEEE80211_CCMP_HDR_LEN);
590 558
591 return RX_CONTINUE; 559 return RX_CONTINUE;
592 } 560 }
593 561
594 static void gcmp_special_blocks(struct sk_buff !! 562 static void gcmp_special_blocks(struct sk_buff *skb, u8 *pn, u8 *j_0, u8 *aad)
595 bool spp_amsdu <<
596 { 563 {
597 struct ieee80211_hdr *hdr = (void *)sk !! 564 __le16 mask_fc;
>> 565 u8 qos_tid;
>> 566 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
598 567
599 memcpy(j_0, hdr->addr2, ETH_ALEN); 568 memcpy(j_0, hdr->addr2, ETH_ALEN);
600 memcpy(&j_0[ETH_ALEN], pn, IEEE80211_G 569 memcpy(&j_0[ETH_ALEN], pn, IEEE80211_GCMP_PN_LEN);
601 j_0[13] = 0; 570 j_0[13] = 0;
602 j_0[14] = 0; 571 j_0[14] = 0;
603 j_0[AES_BLOCK_SIZE - 1] = 0x01; 572 j_0[AES_BLOCK_SIZE - 1] = 0x01;
604 573
605 ccmp_gcmp_aad(skb, aad, spp_amsdu); !! 574 /* AAD (extra authenticate-only data) / masked 802.11 header
>> 575 * FC | A1 | A2 | A3 | SC | [A4] | [QC]
>> 576 */
>> 577 put_unaligned_be16(ieee80211_hdrlen(hdr->frame_control) - 2, &aad[0]);
>> 578 /* Mask FC: zero subtype b4 b5 b6 (if not mgmt)
>> 579 * Retry, PwrMgt, MoreData; set Protected
>> 580 */
>> 581 mask_fc = hdr->frame_control;
>> 582 mask_fc &= ~cpu_to_le16(IEEE80211_FCTL_RETRY |
>> 583 IEEE80211_FCTL_PM | IEEE80211_FCTL_MOREDATA);
>> 584 if (!ieee80211_is_mgmt(hdr->frame_control))
>> 585 mask_fc &= ~cpu_to_le16(0x0070);
>> 586 mask_fc |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
>> 587
>> 588 put_unaligned(mask_fc, (__le16 *)&aad[2]);
>> 589 memcpy(&aad[4], &hdr->addr1, 3 * ETH_ALEN);
>> 590
>> 591 /* Mask Seq#, leave Frag# */
>> 592 aad[22] = *((u8 *)&hdr->seq_ctrl) & 0x0f;
>> 593 aad[23] = 0;
>> 594
>> 595 if (ieee80211_is_data_qos(hdr->frame_control))
>> 596 qos_tid = *ieee80211_get_qos_ctl(hdr) &
>> 597 IEEE80211_QOS_CTL_TID_MASK;
>> 598 else
>> 599 qos_tid = 0;
>> 600
>> 601 if (ieee80211_has_a4(hdr->frame_control)) {
>> 602 memcpy(&aad[24], hdr->addr4, ETH_ALEN);
>> 603 aad[30] = qos_tid;
>> 604 aad[31] = 0;
>> 605 } else {
>> 606 memset(&aad[24], 0, ETH_ALEN + IEEE80211_QOS_CTL_LEN);
>> 607 aad[24] = qos_tid;
>> 608 }
606 } 609 }
607 610
608 static inline void gcmp_pn2hdr(u8 *hdr, const 611 static inline void gcmp_pn2hdr(u8 *hdr, const u8 *pn, int key_id)
609 { 612 {
610 hdr[0] = pn[5]; 613 hdr[0] = pn[5];
611 hdr[1] = pn[4]; 614 hdr[1] = pn[4];
612 hdr[2] = 0; 615 hdr[2] = 0;
613 hdr[3] = 0x20 | (key_id << 6); 616 hdr[3] = 0x20 | (key_id << 6);
614 hdr[4] = pn[3]; 617 hdr[4] = pn[3];
615 hdr[5] = pn[2]; 618 hdr[5] = pn[2];
616 hdr[6] = pn[1]; 619 hdr[6] = pn[1];
617 hdr[7] = pn[0]; 620 hdr[7] = pn[0];
618 } 621 }
619 622
620 static inline void gcmp_hdr2pn(u8 *pn, const u 623 static inline void gcmp_hdr2pn(u8 *pn, const u8 *hdr)
621 { 624 {
622 pn[0] = hdr[7]; 625 pn[0] = hdr[7];
623 pn[1] = hdr[6]; 626 pn[1] = hdr[6];
624 pn[2] = hdr[5]; 627 pn[2] = hdr[5];
625 pn[3] = hdr[4]; 628 pn[3] = hdr[4];
626 pn[4] = hdr[1]; 629 pn[4] = hdr[1];
627 pn[5] = hdr[0]; 630 pn[5] = hdr[0];
628 } 631 }
629 632
630 static int gcmp_encrypt_skb(struct ieee80211_t 633 static int gcmp_encrypt_skb(struct ieee80211_tx_data *tx, struct sk_buff *skb)
631 { 634 {
632 struct ieee80211_hdr *hdr = (struct ie 635 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
633 struct ieee80211_key *key = tx->key; 636 struct ieee80211_key *key = tx->key;
634 struct ieee80211_tx_info *info = IEEE8 637 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
635 int hdrlen, len, tail; 638 int hdrlen, len, tail;
636 u8 *pos; 639 u8 *pos;
637 u8 pn[6]; 640 u8 pn[6];
638 u64 pn64; 641 u64 pn64;
639 u8 aad[GCM_AAD_LEN]; 642 u8 aad[GCM_AAD_LEN];
640 u8 j_0[AES_BLOCK_SIZE]; 643 u8 j_0[AES_BLOCK_SIZE];
641 644
642 if (info->control.hw_key && 645 if (info->control.hw_key &&
643 !(info->control.hw_key->flags & IE 646 !(info->control.hw_key->flags & IEEE80211_KEY_FLAG_GENERATE_IV) &&
644 !(info->control.hw_key->flags & IE 647 !(info->control.hw_key->flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE) &&
645 !((info->control.hw_key->flags & 648 !((info->control.hw_key->flags &
646 IEEE80211_KEY_FLAG_GENERATE_IV_ 649 IEEE80211_KEY_FLAG_GENERATE_IV_MGMT) &&
647 ieee80211_is_mgmt(hdr->frame_con 650 ieee80211_is_mgmt(hdr->frame_control))) {
648 /* hwaccel has no need for pre 651 /* hwaccel has no need for preallocated room for GCMP
649 * header or MIC fields 652 * header or MIC fields
650 */ 653 */
651 return 0; 654 return 0;
652 } 655 }
653 656
654 hdrlen = ieee80211_hdrlen(hdr->frame_c 657 hdrlen = ieee80211_hdrlen(hdr->frame_control);
655 len = skb->len - hdrlen; 658 len = skb->len - hdrlen;
656 659
657 if (info->control.hw_key) 660 if (info->control.hw_key)
658 tail = 0; 661 tail = 0;
659 else 662 else
660 tail = IEEE80211_GCMP_MIC_LEN; 663 tail = IEEE80211_GCMP_MIC_LEN;
661 664
662 if (WARN_ON(skb_tailroom(skb) < tail | 665 if (WARN_ON(skb_tailroom(skb) < tail ||
663 skb_headroom(skb) < IEEE80 666 skb_headroom(skb) < IEEE80211_GCMP_HDR_LEN))
664 return -1; 667 return -1;
665 668
666 pos = skb_push(skb, IEEE80211_GCMP_HDR 669 pos = skb_push(skb, IEEE80211_GCMP_HDR_LEN);
667 memmove(pos, pos + IEEE80211_GCMP_HDR_ 670 memmove(pos, pos + IEEE80211_GCMP_HDR_LEN, hdrlen);
668 skb_set_network_header(skb, skb_networ 671 skb_set_network_header(skb, skb_network_offset(skb) +
669 IEEE80211_ 672 IEEE80211_GCMP_HDR_LEN);
670 673
671 /* the HW only needs room for the IV, 674 /* the HW only needs room for the IV, but not the actual IV */
672 if (info->control.hw_key && 675 if (info->control.hw_key &&
673 (info->control.hw_key->flags & IEE 676 (info->control.hw_key->flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE))
674 return 0; 677 return 0;
675 678
>> 679 hdr = (struct ieee80211_hdr *)pos;
676 pos += hdrlen; 680 pos += hdrlen;
677 681
678 pn64 = atomic64_inc_return(&key->conf. 682 pn64 = atomic64_inc_return(&key->conf.tx_pn);
679 683
680 pn[5] = pn64; 684 pn[5] = pn64;
681 pn[4] = pn64 >> 8; 685 pn[4] = pn64 >> 8;
682 pn[3] = pn64 >> 16; 686 pn[3] = pn64 >> 16;
683 pn[2] = pn64 >> 24; 687 pn[2] = pn64 >> 24;
684 pn[1] = pn64 >> 32; 688 pn[1] = pn64 >> 32;
685 pn[0] = pn64 >> 40; 689 pn[0] = pn64 >> 40;
686 690
687 gcmp_pn2hdr(pos, pn, key->conf.keyidx) 691 gcmp_pn2hdr(pos, pn, key->conf.keyidx);
688 692
689 /* hwaccel - with software GCMP header 693 /* hwaccel - with software GCMP header */
690 if (info->control.hw_key) 694 if (info->control.hw_key)
691 return 0; 695 return 0;
692 696
693 pos += IEEE80211_GCMP_HDR_LEN; 697 pos += IEEE80211_GCMP_HDR_LEN;
694 gcmp_special_blocks(skb, pn, j_0, aad, !! 698 gcmp_special_blocks(skb, pn, j_0, aad);
695 key->conf.flags & <<
696 return ieee80211_aes_gcm_encrypt(key-> 699 return ieee80211_aes_gcm_encrypt(key->u.gcmp.tfm, j_0, aad, pos, len,
697 skb_p 700 skb_put(skb, IEEE80211_GCMP_MIC_LEN));
698 } 701 }
699 702
700 ieee80211_tx_result 703 ieee80211_tx_result
701 ieee80211_crypto_gcmp_encrypt(struct ieee80211 704 ieee80211_crypto_gcmp_encrypt(struct ieee80211_tx_data *tx)
702 { 705 {
703 struct sk_buff *skb; 706 struct sk_buff *skb;
704 707
705 ieee80211_tx_set_protected(tx); 708 ieee80211_tx_set_protected(tx);
706 709
707 skb_queue_walk(&tx->skbs, skb) { 710 skb_queue_walk(&tx->skbs, skb) {
708 if (gcmp_encrypt_skb(tx, skb) 711 if (gcmp_encrypt_skb(tx, skb) < 0)
709 return TX_DROP; 712 return TX_DROP;
710 } 713 }
711 714
712 return TX_CONTINUE; 715 return TX_CONTINUE;
713 } 716 }
714 717
715 ieee80211_rx_result 718 ieee80211_rx_result
716 ieee80211_crypto_gcmp_decrypt(struct ieee80211 719 ieee80211_crypto_gcmp_decrypt(struct ieee80211_rx_data *rx)
717 { 720 {
718 struct ieee80211_hdr *hdr = (struct ie 721 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data;
719 int hdrlen; 722 int hdrlen;
720 struct ieee80211_key *key = rx->key; 723 struct ieee80211_key *key = rx->key;
721 struct sk_buff *skb = rx->skb; 724 struct sk_buff *skb = rx->skb;
722 struct ieee80211_rx_status *status = I 725 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
723 u8 pn[IEEE80211_GCMP_PN_LEN]; 726 u8 pn[IEEE80211_GCMP_PN_LEN];
724 int data_len, queue, mic_len = IEEE802 727 int data_len, queue, mic_len = IEEE80211_GCMP_MIC_LEN;
725 728
726 hdrlen = ieee80211_hdrlen(hdr->frame_c 729 hdrlen = ieee80211_hdrlen(hdr->frame_control);
727 730
728 if (!ieee80211_is_data(hdr->frame_cont 731 if (!ieee80211_is_data(hdr->frame_control) &&
729 !ieee80211_is_robust_mgmt_frame(sk 732 !ieee80211_is_robust_mgmt_frame(skb))
730 return RX_CONTINUE; 733 return RX_CONTINUE;
731 734
732 if (status->flag & RX_FLAG_DECRYPTED) 735 if (status->flag & RX_FLAG_DECRYPTED) {
733 if (!pskb_may_pull(rx->skb, hd 736 if (!pskb_may_pull(rx->skb, hdrlen + IEEE80211_GCMP_HDR_LEN))
734 return RX_DROP_U_SHORT !! 737 return RX_DROP_UNUSABLE;
735 if (status->flag & RX_FLAG_MIC 738 if (status->flag & RX_FLAG_MIC_STRIPPED)
736 mic_len = 0; 739 mic_len = 0;
737 } else { 740 } else {
738 if (skb_linearize(rx->skb)) 741 if (skb_linearize(rx->skb))
739 return RX_DROP_U_OOM; !! 742 return RX_DROP_UNUSABLE;
740 } 743 }
741 744
742 /* reload hdr - skb might have been re <<
743 hdr = (void *)rx->skb->data; <<
744 <<
745 data_len = skb->len - hdrlen - IEEE802 745 data_len = skb->len - hdrlen - IEEE80211_GCMP_HDR_LEN - mic_len;
746 if (!rx->sta || data_len < 0) 746 if (!rx->sta || data_len < 0)
747 return RX_DROP_U_SHORT_GCMP; !! 747 return RX_DROP_UNUSABLE;
748 748
749 if (!(status->flag & RX_FLAG_PN_VALIDA 749 if (!(status->flag & RX_FLAG_PN_VALIDATED)) {
750 int res; 750 int res;
751 751
752 gcmp_hdr2pn(pn, skb->data + hd 752 gcmp_hdr2pn(pn, skb->data + hdrlen);
753 753
754 queue = rx->security_idx; 754 queue = rx->security_idx;
755 755
756 res = memcmp(pn, key->u.gcmp.r 756 res = memcmp(pn, key->u.gcmp.rx_pn[queue],
757 IEEE80211_GCMP_PN 757 IEEE80211_GCMP_PN_LEN);
758 if (res < 0 || 758 if (res < 0 ||
759 (!res && !(status->flag & 759 (!res && !(status->flag & RX_FLAG_ALLOW_SAME_PN))) {
760 key->u.gcmp.replays++; 760 key->u.gcmp.replays++;
761 return RX_DROP_U_REPLA !! 761 return RX_DROP_UNUSABLE;
762 } 762 }
763 763
764 if (!(status->flag & RX_FLAG_D 764 if (!(status->flag & RX_FLAG_DECRYPTED)) {
765 u8 aad[2 * AES_BLOCK_S 765 u8 aad[2 * AES_BLOCK_SIZE];
766 u8 j_0[AES_BLOCK_SIZE] 766 u8 j_0[AES_BLOCK_SIZE];
767 /* hardware didn't dec 767 /* hardware didn't decrypt/verify MIC */
768 gcmp_special_blocks(sk !! 768 gcmp_special_blocks(skb, pn, j_0, aad);
769 ke <<
770 769
771 if (ieee80211_aes_gcm_ 770 if (ieee80211_aes_gcm_decrypt(
772 key->u.gcm 771 key->u.gcmp.tfm, j_0, aad,
773 skb->data 772 skb->data + hdrlen + IEEE80211_GCMP_HDR_LEN,
774 data_len, 773 data_len,
775 skb->data 774 skb->data + skb->len -
776 IEEE80211_ 775 IEEE80211_GCMP_MIC_LEN))
777 return RX_DROP !! 776 return RX_DROP_UNUSABLE;
778 } 777 }
779 778
780 memcpy(key->u.gcmp.rx_pn[queue 779 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 } 780 }
784 781
785 /* Remove GCMP header and MIC */ 782 /* Remove GCMP header and MIC */
786 if (pskb_trim(skb, skb->len - mic_len) 783 if (pskb_trim(skb, skb->len - mic_len))
787 return RX_DROP_U_SHORT_GCMP_MI !! 784 return RX_DROP_UNUSABLE;
788 memmove(skb->data + IEEE80211_GCMP_HDR 785 memmove(skb->data + IEEE80211_GCMP_HDR_LEN, skb->data, hdrlen);
789 skb_pull(skb, IEEE80211_GCMP_HDR_LEN); 786 skb_pull(skb, IEEE80211_GCMP_HDR_LEN);
790 787
791 return RX_CONTINUE; 788 return RX_CONTINUE;
792 } 789 }
793 790
>> 791 static ieee80211_tx_result
>> 792 ieee80211_crypto_cs_encrypt(struct ieee80211_tx_data *tx,
>> 793 struct sk_buff *skb)
>> 794 {
>> 795 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
>> 796 struct ieee80211_key *key = tx->key;
>> 797 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
>> 798 int hdrlen;
>> 799 u8 *pos, iv_len = key->conf.iv_len;
>> 800
>> 801 if (info->control.hw_key &&
>> 802 !(info->control.hw_key->flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE)) {
>> 803 /* hwaccel has no need for preallocated head room */
>> 804 return TX_CONTINUE;
>> 805 }
>> 806
>> 807 if (unlikely(skb_headroom(skb) < iv_len &&
>> 808 pskb_expand_head(skb, iv_len, 0, GFP_ATOMIC)))
>> 809 return TX_DROP;
>> 810
>> 811 hdrlen = ieee80211_hdrlen(hdr->frame_control);
>> 812
>> 813 pos = skb_push(skb, iv_len);
>> 814 memmove(pos, pos + iv_len, hdrlen);
>> 815
>> 816 return TX_CONTINUE;
>> 817 }
>> 818
>> 819 static inline int ieee80211_crypto_cs_pn_compare(u8 *pn1, u8 *pn2, int len)
>> 820 {
>> 821 int i;
>> 822
>> 823 /* pn is little endian */
>> 824 for (i = len - 1; i >= 0; i--) {
>> 825 if (pn1[i] < pn2[i])
>> 826 return -1;
>> 827 else if (pn1[i] > pn2[i])
>> 828 return 1;
>> 829 }
>> 830
>> 831 return 0;
>> 832 }
>> 833
>> 834 static ieee80211_rx_result
>> 835 ieee80211_crypto_cs_decrypt(struct ieee80211_rx_data *rx)
>> 836 {
>> 837 struct ieee80211_key *key = rx->key;
>> 838 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data;
>> 839 const struct ieee80211_cipher_scheme *cs = NULL;
>> 840 int hdrlen = ieee80211_hdrlen(hdr->frame_control);
>> 841 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb);
>> 842 int data_len;
>> 843 u8 *rx_pn;
>> 844 u8 *skb_pn;
>> 845 u8 qos_tid;
>> 846
>> 847 if (!rx->sta || !rx->sta->cipher_scheme ||
>> 848 !(status->flag & RX_FLAG_DECRYPTED))
>> 849 return RX_DROP_UNUSABLE;
>> 850
>> 851 if (!ieee80211_is_data(hdr->frame_control))
>> 852 return RX_CONTINUE;
>> 853
>> 854 cs = rx->sta->cipher_scheme;
>> 855
>> 856 data_len = rx->skb->len - hdrlen - cs->hdr_len;
>> 857
>> 858 if (data_len < 0)
>> 859 return RX_DROP_UNUSABLE;
>> 860
>> 861 if (ieee80211_is_data_qos(hdr->frame_control))
>> 862 qos_tid = *ieee80211_get_qos_ctl(hdr) &
>> 863 IEEE80211_QOS_CTL_TID_MASK;
>> 864 else
>> 865 qos_tid = 0;
>> 866
>> 867 if (skb_linearize(rx->skb))
>> 868 return RX_DROP_UNUSABLE;
>> 869
>> 870 hdr = (struct ieee80211_hdr *)rx->skb->data;
>> 871
>> 872 rx_pn = key->u.gen.rx_pn[qos_tid];
>> 873 skb_pn = rx->skb->data + hdrlen + cs->pn_off;
>> 874
>> 875 if (ieee80211_crypto_cs_pn_compare(skb_pn, rx_pn, cs->pn_len) <= 0)
>> 876 return RX_DROP_UNUSABLE;
>> 877
>> 878 memcpy(rx_pn, skb_pn, cs->pn_len);
>> 879
>> 880 /* remove security header and MIC */
>> 881 if (pskb_trim(rx->skb, rx->skb->len - cs->mic_len))
>> 882 return RX_DROP_UNUSABLE;
>> 883
>> 884 memmove(rx->skb->data + cs->hdr_len, rx->skb->data, hdrlen);
>> 885 skb_pull(rx->skb, cs->hdr_len);
>> 886
>> 887 return RX_CONTINUE;
>> 888 }
>> 889
794 static void bip_aad(struct sk_buff *skb, u8 *a 890 static void bip_aad(struct sk_buff *skb, u8 *aad)
795 { 891 {
796 __le16 mask_fc; 892 __le16 mask_fc;
797 struct ieee80211_hdr *hdr = (struct ie 893 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
798 894
799 /* BIP AAD: FC(masked) || A1 || A2 || 895 /* BIP AAD: FC(masked) || A1 || A2 || A3 */
800 896
801 /* FC type/subtype */ 897 /* FC type/subtype */
802 /* Mask FC Retry, PwrMgt, MoreData fla 898 /* Mask FC Retry, PwrMgt, MoreData flags to zero */
803 mask_fc = hdr->frame_control; 899 mask_fc = hdr->frame_control;
804 mask_fc &= ~cpu_to_le16(IEEE80211_FCTL 900 mask_fc &= ~cpu_to_le16(IEEE80211_FCTL_RETRY | IEEE80211_FCTL_PM |
805 IEEE80211_FCTL 901 IEEE80211_FCTL_MOREDATA);
806 put_unaligned(mask_fc, (__le16 *) &aad 902 put_unaligned(mask_fc, (__le16 *) &aad[0]);
807 /* A1 || A2 || A3 */ 903 /* A1 || A2 || A3 */
808 memcpy(aad + 2, &hdr->addrs, 3 * ETH_A !! 904 memcpy(aad + 2, &hdr->addr1, 3 * ETH_ALEN);
809 } 905 }
810 906
811 907
812 static inline void bip_ipn_set64(u8 *d, u64 pn 908 static inline void bip_ipn_set64(u8 *d, u64 pn)
813 { 909 {
814 *d++ = pn; 910 *d++ = pn;
815 *d++ = pn >> 8; 911 *d++ = pn >> 8;
816 *d++ = pn >> 16; 912 *d++ = pn >> 16;
817 *d++ = pn >> 24; 913 *d++ = pn >> 24;
818 *d++ = pn >> 32; 914 *d++ = pn >> 32;
819 *d = pn >> 40; 915 *d = pn >> 40;
820 } 916 }
821 917
822 static inline void bip_ipn_swap(u8 *d, const u 918 static inline void bip_ipn_swap(u8 *d, const u8 *s)
823 { 919 {
824 *d++ = s[5]; 920 *d++ = s[5];
825 *d++ = s[4]; 921 *d++ = s[4];
826 *d++ = s[3]; 922 *d++ = s[3];
827 *d++ = s[2]; 923 *d++ = s[2];
828 *d++ = s[1]; 924 *d++ = s[1];
829 *d = s[0]; 925 *d = s[0];
830 } 926 }
831 927
832 928
833 ieee80211_tx_result 929 ieee80211_tx_result
834 ieee80211_crypto_aes_cmac_encrypt(struct ieee8 930 ieee80211_crypto_aes_cmac_encrypt(struct ieee80211_tx_data *tx)
835 { 931 {
836 struct sk_buff *skb; 932 struct sk_buff *skb;
837 struct ieee80211_tx_info *info; 933 struct ieee80211_tx_info *info;
838 struct ieee80211_key *key = tx->key; 934 struct ieee80211_key *key = tx->key;
839 struct ieee80211_mmie *mmie; 935 struct ieee80211_mmie *mmie;
840 u8 aad[20]; 936 u8 aad[20];
841 u64 pn64; 937 u64 pn64;
842 938
843 if (WARN_ON(skb_queue_len(&tx->skbs) ! 939 if (WARN_ON(skb_queue_len(&tx->skbs) != 1))
844 return TX_DROP; 940 return TX_DROP;
845 941
846 skb = skb_peek(&tx->skbs); 942 skb = skb_peek(&tx->skbs);
847 943
848 info = IEEE80211_SKB_CB(skb); 944 info = IEEE80211_SKB_CB(skb);
849 945
850 if (info->control.hw_key && !! 946 if (info->control.hw_key)
851 !(key->conf.flags & IEEE80211_KEY_ <<
852 return TX_CONTINUE; 947 return TX_CONTINUE;
853 948
854 if (WARN_ON(skb_tailroom(skb) < sizeof 949 if (WARN_ON(skb_tailroom(skb) < sizeof(*mmie)))
855 return TX_DROP; 950 return TX_DROP;
856 951
857 mmie = skb_put(skb, sizeof(*mmie)); 952 mmie = skb_put(skb, sizeof(*mmie));
858 mmie->element_id = WLAN_EID_MMIE; 953 mmie->element_id = WLAN_EID_MMIE;
859 mmie->length = sizeof(*mmie) - 2; 954 mmie->length = sizeof(*mmie) - 2;
860 mmie->key_id = cpu_to_le16(key->conf.k 955 mmie->key_id = cpu_to_le16(key->conf.keyidx);
861 956
862 /* PN = PN + 1 */ 957 /* PN = PN + 1 */
863 pn64 = atomic64_inc_return(&key->conf. 958 pn64 = atomic64_inc_return(&key->conf.tx_pn);
864 959
865 bip_ipn_set64(mmie->sequence_number, p 960 bip_ipn_set64(mmie->sequence_number, pn64);
866 961
867 if (info->control.hw_key) <<
868 return TX_CONTINUE; <<
869 <<
870 bip_aad(skb, aad); 962 bip_aad(skb, aad);
871 963
872 /* 964 /*
873 * MIC = AES-128-CMAC(IGTK, AAD || Man 965 * MIC = AES-128-CMAC(IGTK, AAD || Management Frame Body || MMIE, 64)
874 */ 966 */
875 ieee80211_aes_cmac(key->u.aes_cmac.tfm 967 ieee80211_aes_cmac(key->u.aes_cmac.tfm, aad,
876 skb->data + 24, skb 968 skb->data + 24, skb->len - 24, mmie->mic);
877 969
878 return TX_CONTINUE; 970 return TX_CONTINUE;
879 } 971 }
880 972
881 ieee80211_tx_result 973 ieee80211_tx_result
882 ieee80211_crypto_aes_cmac_256_encrypt(struct i 974 ieee80211_crypto_aes_cmac_256_encrypt(struct ieee80211_tx_data *tx)
883 { 975 {
884 struct sk_buff *skb; 976 struct sk_buff *skb;
885 struct ieee80211_tx_info *info; 977 struct ieee80211_tx_info *info;
886 struct ieee80211_key *key = tx->key; 978 struct ieee80211_key *key = tx->key;
887 struct ieee80211_mmie_16 *mmie; 979 struct ieee80211_mmie_16 *mmie;
888 u8 aad[20]; 980 u8 aad[20];
889 u64 pn64; 981 u64 pn64;
890 982
891 if (WARN_ON(skb_queue_len(&tx->skbs) ! 983 if (WARN_ON(skb_queue_len(&tx->skbs) != 1))
892 return TX_DROP; 984 return TX_DROP;
893 985
894 skb = skb_peek(&tx->skbs); 986 skb = skb_peek(&tx->skbs);
895 987
896 info = IEEE80211_SKB_CB(skb); 988 info = IEEE80211_SKB_CB(skb);
897 989
898 if (info->control.hw_key && !! 990 if (info->control.hw_key)
899 !(key->conf.flags & IEEE80211_KEY_ <<
900 return TX_CONTINUE; 991 return TX_CONTINUE;
901 992
902 if (WARN_ON(skb_tailroom(skb) < sizeof 993 if (WARN_ON(skb_tailroom(skb) < sizeof(*mmie)))
903 return TX_DROP; 994 return TX_DROP;
904 995
905 mmie = skb_put(skb, sizeof(*mmie)); 996 mmie = skb_put(skb, sizeof(*mmie));
906 mmie->element_id = WLAN_EID_MMIE; 997 mmie->element_id = WLAN_EID_MMIE;
907 mmie->length = sizeof(*mmie) - 2; 998 mmie->length = sizeof(*mmie) - 2;
908 mmie->key_id = cpu_to_le16(key->conf.k 999 mmie->key_id = cpu_to_le16(key->conf.keyidx);
909 1000
910 /* PN = PN + 1 */ 1001 /* PN = PN + 1 */
911 pn64 = atomic64_inc_return(&key->conf. 1002 pn64 = atomic64_inc_return(&key->conf.tx_pn);
912 1003
913 bip_ipn_set64(mmie->sequence_number, p 1004 bip_ipn_set64(mmie->sequence_number, pn64);
914 1005
915 if (info->control.hw_key) <<
916 return TX_CONTINUE; <<
917 <<
918 bip_aad(skb, aad); 1006 bip_aad(skb, aad);
919 1007
920 /* MIC = AES-256-CMAC(IGTK, AAD || Man 1008 /* MIC = AES-256-CMAC(IGTK, AAD || Management Frame Body || MMIE, 128)
921 */ 1009 */
922 ieee80211_aes_cmac_256(key->u.aes_cmac 1010 ieee80211_aes_cmac_256(key->u.aes_cmac.tfm, aad,
923 skb->data + 24, 1011 skb->data + 24, skb->len - 24, mmie->mic);
924 1012
925 return TX_CONTINUE; 1013 return TX_CONTINUE;
926 } 1014 }
927 1015
928 ieee80211_rx_result 1016 ieee80211_rx_result
929 ieee80211_crypto_aes_cmac_decrypt(struct ieee8 1017 ieee80211_crypto_aes_cmac_decrypt(struct ieee80211_rx_data *rx)
930 { 1018 {
931 struct sk_buff *skb = rx->skb; 1019 struct sk_buff *skb = rx->skb;
932 struct ieee80211_rx_status *status = I 1020 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
933 struct ieee80211_key *key = rx->key; 1021 struct ieee80211_key *key = rx->key;
934 struct ieee80211_mmie *mmie; 1022 struct ieee80211_mmie *mmie;
935 u8 aad[20], mic[8], ipn[6]; 1023 u8 aad[20], mic[8], ipn[6];
936 struct ieee80211_hdr *hdr = (struct ie 1024 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
937 1025
938 if (!ieee80211_is_mgmt(hdr->frame_cont 1026 if (!ieee80211_is_mgmt(hdr->frame_control))
939 return RX_CONTINUE; 1027 return RX_CONTINUE;
940 1028
941 /* management frames are already linea 1029 /* management frames are already linear */
942 1030
943 if (skb->len < 24 + sizeof(*mmie)) 1031 if (skb->len < 24 + sizeof(*mmie))
944 return RX_DROP_U_SHORT_CMAC; !! 1032 return RX_DROP_UNUSABLE;
945 1033
946 mmie = (struct ieee80211_mmie *) 1034 mmie = (struct ieee80211_mmie *)
947 (skb->data + skb->len - sizeof 1035 (skb->data + skb->len - sizeof(*mmie));
948 if (mmie->element_id != WLAN_EID_MMIE 1036 if (mmie->element_id != WLAN_EID_MMIE ||
949 mmie->length != sizeof(*mmie) - 2) 1037 mmie->length != sizeof(*mmie) - 2)
950 return RX_DROP_U_BAD_MMIE; /* !! 1038 return RX_DROP_UNUSABLE; /* Invalid MMIE */
951 1039
952 bip_ipn_swap(ipn, mmie->sequence_numbe 1040 bip_ipn_swap(ipn, mmie->sequence_number);
953 1041
954 if (memcmp(ipn, key->u.aes_cmac.rx_pn, 1042 if (memcmp(ipn, key->u.aes_cmac.rx_pn, 6) <= 0) {
955 key->u.aes_cmac.replays++; 1043 key->u.aes_cmac.replays++;
956 return RX_DROP_U_REPLAY; !! 1044 return RX_DROP_UNUSABLE;
957 } 1045 }
958 1046
959 if (!(status->flag & RX_FLAG_DECRYPTED 1047 if (!(status->flag & RX_FLAG_DECRYPTED)) {
960 /* hardware didn't decrypt/ver 1048 /* hardware didn't decrypt/verify MIC */
961 bip_aad(skb, aad); 1049 bip_aad(skb, aad);
962 ieee80211_aes_cmac(key->u.aes_ 1050 ieee80211_aes_cmac(key->u.aes_cmac.tfm, aad,
963 skb->data + 1051 skb->data + 24, skb->len - 24, mic);
964 if (crypto_memneq(mic, mmie->m 1052 if (crypto_memneq(mic, mmie->mic, sizeof(mmie->mic))) {
965 key->u.aes_cmac.icverr 1053 key->u.aes_cmac.icverrors++;
966 return RX_DROP_U_MIC_F !! 1054 return RX_DROP_UNUSABLE;
967 } 1055 }
968 } 1056 }
969 1057
970 memcpy(key->u.aes_cmac.rx_pn, ipn, 6); 1058 memcpy(key->u.aes_cmac.rx_pn, ipn, 6);
971 1059
972 /* Remove MMIE */ 1060 /* Remove MMIE */
973 skb_trim(skb, skb->len - sizeof(*mmie) 1061 skb_trim(skb, skb->len - sizeof(*mmie));
974 1062
975 return RX_CONTINUE; 1063 return RX_CONTINUE;
976 } 1064 }
977 1065
978 ieee80211_rx_result 1066 ieee80211_rx_result
979 ieee80211_crypto_aes_cmac_256_decrypt(struct i 1067 ieee80211_crypto_aes_cmac_256_decrypt(struct ieee80211_rx_data *rx)
980 { 1068 {
981 struct sk_buff *skb = rx->skb; 1069 struct sk_buff *skb = rx->skb;
982 struct ieee80211_rx_status *status = I 1070 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
983 struct ieee80211_key *key = rx->key; 1071 struct ieee80211_key *key = rx->key;
984 struct ieee80211_mmie_16 *mmie; 1072 struct ieee80211_mmie_16 *mmie;
985 u8 aad[20], mic[16], ipn[6]; 1073 u8 aad[20], mic[16], ipn[6];
986 struct ieee80211_hdr *hdr = (struct ie 1074 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
987 1075
988 if (!ieee80211_is_mgmt(hdr->frame_cont 1076 if (!ieee80211_is_mgmt(hdr->frame_control))
989 return RX_CONTINUE; 1077 return RX_CONTINUE;
990 1078
991 /* management frames are already linea 1079 /* management frames are already linear */
992 1080
993 if (skb->len < 24 + sizeof(*mmie)) 1081 if (skb->len < 24 + sizeof(*mmie))
994 return RX_DROP_U_SHORT_CMAC256 !! 1082 return RX_DROP_UNUSABLE;
995 1083
996 mmie = (struct ieee80211_mmie_16 *) 1084 mmie = (struct ieee80211_mmie_16 *)
997 (skb->data + skb->len - sizeof 1085 (skb->data + skb->len - sizeof(*mmie));
998 if (mmie->element_id != WLAN_EID_MMIE 1086 if (mmie->element_id != WLAN_EID_MMIE ||
999 mmie->length != sizeof(*mmie) - 2) 1087 mmie->length != sizeof(*mmie) - 2)
1000 return RX_DROP_U_BAD_MMIE; /* !! 1088 return RX_DROP_UNUSABLE; /* Invalid MMIE */
1001 1089
1002 bip_ipn_swap(ipn, mmie->sequence_numb 1090 bip_ipn_swap(ipn, mmie->sequence_number);
1003 1091
1004 if (memcmp(ipn, key->u.aes_cmac.rx_pn 1092 if (memcmp(ipn, key->u.aes_cmac.rx_pn, 6) <= 0) {
1005 key->u.aes_cmac.replays++; 1093 key->u.aes_cmac.replays++;
1006 return RX_DROP_U_REPLAY; !! 1094 return RX_DROP_UNUSABLE;
1007 } 1095 }
1008 1096
1009 if (!(status->flag & RX_FLAG_DECRYPTE 1097 if (!(status->flag & RX_FLAG_DECRYPTED)) {
1010 /* hardware didn't decrypt/ve 1098 /* hardware didn't decrypt/verify MIC */
1011 bip_aad(skb, aad); 1099 bip_aad(skb, aad);
1012 ieee80211_aes_cmac_256(key->u 1100 ieee80211_aes_cmac_256(key->u.aes_cmac.tfm, aad,
1013 skb->d 1101 skb->data + 24, skb->len - 24, mic);
1014 if (crypto_memneq(mic, mmie-> 1102 if (crypto_memneq(mic, mmie->mic, sizeof(mmie->mic))) {
1015 key->u.aes_cmac.icver 1103 key->u.aes_cmac.icverrors++;
1016 return RX_DROP_U_MIC_ !! 1104 return RX_DROP_UNUSABLE;
1017 } 1105 }
1018 } 1106 }
1019 1107
1020 memcpy(key->u.aes_cmac.rx_pn, ipn, 6) 1108 memcpy(key->u.aes_cmac.rx_pn, ipn, 6);
1021 1109
1022 /* Remove MMIE */ 1110 /* Remove MMIE */
1023 skb_trim(skb, skb->len - sizeof(*mmie 1111 skb_trim(skb, skb->len - sizeof(*mmie));
1024 1112
1025 return RX_CONTINUE; 1113 return RX_CONTINUE;
1026 } 1114 }
1027 1115
1028 ieee80211_tx_result 1116 ieee80211_tx_result
1029 ieee80211_crypto_aes_gmac_encrypt(struct ieee 1117 ieee80211_crypto_aes_gmac_encrypt(struct ieee80211_tx_data *tx)
1030 { 1118 {
1031 struct sk_buff *skb; 1119 struct sk_buff *skb;
1032 struct ieee80211_tx_info *info; 1120 struct ieee80211_tx_info *info;
1033 struct ieee80211_key *key = tx->key; 1121 struct ieee80211_key *key = tx->key;
1034 struct ieee80211_mmie_16 *mmie; 1122 struct ieee80211_mmie_16 *mmie;
1035 struct ieee80211_hdr *hdr; 1123 struct ieee80211_hdr *hdr;
1036 u8 aad[GMAC_AAD_LEN]; 1124 u8 aad[GMAC_AAD_LEN];
1037 u64 pn64; 1125 u64 pn64;
1038 u8 nonce[GMAC_NONCE_LEN]; 1126 u8 nonce[GMAC_NONCE_LEN];
1039 1127
1040 if (WARN_ON(skb_queue_len(&tx->skbs) 1128 if (WARN_ON(skb_queue_len(&tx->skbs) != 1))
1041 return TX_DROP; 1129 return TX_DROP;
1042 1130
1043 skb = skb_peek(&tx->skbs); 1131 skb = skb_peek(&tx->skbs);
1044 1132
1045 info = IEEE80211_SKB_CB(skb); 1133 info = IEEE80211_SKB_CB(skb);
1046 1134
1047 if (info->control.hw_key && !! 1135 if (info->control.hw_key)
1048 !(key->conf.flags & IEEE80211_KEY <<
1049 return TX_CONTINUE; 1136 return TX_CONTINUE;
1050 1137
1051 if (WARN_ON(skb_tailroom(skb) < sizeo 1138 if (WARN_ON(skb_tailroom(skb) < sizeof(*mmie)))
1052 return TX_DROP; 1139 return TX_DROP;
1053 1140
1054 mmie = skb_put(skb, sizeof(*mmie)); 1141 mmie = skb_put(skb, sizeof(*mmie));
1055 mmie->element_id = WLAN_EID_MMIE; 1142 mmie->element_id = WLAN_EID_MMIE;
1056 mmie->length = sizeof(*mmie) - 2; 1143 mmie->length = sizeof(*mmie) - 2;
1057 mmie->key_id = cpu_to_le16(key->conf. 1144 mmie->key_id = cpu_to_le16(key->conf.keyidx);
1058 1145
1059 /* PN = PN + 1 */ 1146 /* PN = PN + 1 */
1060 pn64 = atomic64_inc_return(&key->conf 1147 pn64 = atomic64_inc_return(&key->conf.tx_pn);
1061 1148
1062 bip_ipn_set64(mmie->sequence_number, 1149 bip_ipn_set64(mmie->sequence_number, pn64);
1063 1150
1064 if (info->control.hw_key) <<
1065 return TX_CONTINUE; <<
1066 <<
1067 bip_aad(skb, aad); 1151 bip_aad(skb, aad);
1068 1152
1069 hdr = (struct ieee80211_hdr *)skb->da 1153 hdr = (struct ieee80211_hdr *)skb->data;
1070 memcpy(nonce, hdr->addr2, ETH_ALEN); 1154 memcpy(nonce, hdr->addr2, ETH_ALEN);
1071 bip_ipn_swap(nonce + ETH_ALEN, mmie-> 1155 bip_ipn_swap(nonce + ETH_ALEN, mmie->sequence_number);
1072 1156
1073 /* MIC = AES-GMAC(IGTK, AAD || Manage 1157 /* MIC = AES-GMAC(IGTK, AAD || Management Frame Body || MMIE, 128) */
1074 if (ieee80211_aes_gmac(key->u.aes_gma 1158 if (ieee80211_aes_gmac(key->u.aes_gmac.tfm, aad, nonce,
1075 skb->data + 24 1159 skb->data + 24, skb->len - 24, mmie->mic) < 0)
1076 return TX_DROP; 1160 return TX_DROP;
1077 1161
1078 return TX_CONTINUE; 1162 return TX_CONTINUE;
1079 } 1163 }
1080 1164
1081 ieee80211_rx_result 1165 ieee80211_rx_result
1082 ieee80211_crypto_aes_gmac_decrypt(struct ieee 1166 ieee80211_crypto_aes_gmac_decrypt(struct ieee80211_rx_data *rx)
1083 { 1167 {
1084 struct sk_buff *skb = rx->skb; 1168 struct sk_buff *skb = rx->skb;
1085 struct ieee80211_rx_status *status = 1169 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
1086 struct ieee80211_key *key = rx->key; 1170 struct ieee80211_key *key = rx->key;
1087 struct ieee80211_mmie_16 *mmie; 1171 struct ieee80211_mmie_16 *mmie;
1088 u8 aad[GMAC_AAD_LEN], *mic, ipn[6], n !! 1172 u8 aad[GMAC_AAD_LEN], mic[GMAC_MIC_LEN], ipn[6], nonce[GMAC_NONCE_LEN];
1089 struct ieee80211_hdr *hdr = (struct i 1173 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
1090 1174
1091 if (!ieee80211_is_mgmt(hdr->frame_con 1175 if (!ieee80211_is_mgmt(hdr->frame_control))
1092 return RX_CONTINUE; 1176 return RX_CONTINUE;
1093 1177
1094 /* management frames are already line 1178 /* management frames are already linear */
1095 1179
1096 if (skb->len < 24 + sizeof(*mmie)) 1180 if (skb->len < 24 + sizeof(*mmie))
1097 return RX_DROP_U_SHORT_GMAC; !! 1181 return RX_DROP_UNUSABLE;
1098 1182
1099 mmie = (struct ieee80211_mmie_16 *) 1183 mmie = (struct ieee80211_mmie_16 *)
1100 (skb->data + skb->len - sizeo 1184 (skb->data + skb->len - sizeof(*mmie));
1101 if (mmie->element_id != WLAN_EID_MMIE 1185 if (mmie->element_id != WLAN_EID_MMIE ||
1102 mmie->length != sizeof(*mmie) - 2 1186 mmie->length != sizeof(*mmie) - 2)
1103 return RX_DROP_U_BAD_MMIE; /* !! 1187 return RX_DROP_UNUSABLE; /* Invalid MMIE */
1104 1188
1105 bip_ipn_swap(ipn, mmie->sequence_numb 1189 bip_ipn_swap(ipn, mmie->sequence_number);
1106 1190
1107 if (memcmp(ipn, key->u.aes_gmac.rx_pn 1191 if (memcmp(ipn, key->u.aes_gmac.rx_pn, 6) <= 0) {
1108 key->u.aes_gmac.replays++; 1192 key->u.aes_gmac.replays++;
1109 return RX_DROP_U_REPLAY; !! 1193 return RX_DROP_UNUSABLE;
1110 } 1194 }
1111 1195
1112 if (!(status->flag & RX_FLAG_DECRYPTE 1196 if (!(status->flag & RX_FLAG_DECRYPTED)) {
1113 /* hardware didn't decrypt/ve 1197 /* hardware didn't decrypt/verify MIC */
1114 bip_aad(skb, aad); 1198 bip_aad(skb, aad);
1115 1199
1116 memcpy(nonce, hdr->addr2, ETH 1200 memcpy(nonce, hdr->addr2, ETH_ALEN);
1117 memcpy(nonce + ETH_ALEN, ipn, 1201 memcpy(nonce + ETH_ALEN, ipn, 6);
1118 1202
1119 mic = kmalloc(GMAC_MIC_LEN, G <<
1120 if (!mic) <<
1121 return RX_DROP_U_OOM; <<
1122 if (ieee80211_aes_gmac(key->u 1203 if (ieee80211_aes_gmac(key->u.aes_gmac.tfm, aad, nonce,
1123 skb->d 1204 skb->data + 24, skb->len - 24,
1124 mic) < 1205 mic) < 0 ||
1125 crypto_memneq(mic, mmie-> 1206 crypto_memneq(mic, mmie->mic, sizeof(mmie->mic))) {
1126 key->u.aes_gmac.icver 1207 key->u.aes_gmac.icverrors++;
1127 kfree(mic); !! 1208 return RX_DROP_UNUSABLE;
1128 return RX_DROP_U_MIC_ <<
1129 } 1209 }
1130 kfree(mic); <<
1131 } 1210 }
1132 1211
1133 memcpy(key->u.aes_gmac.rx_pn, ipn, 6) 1212 memcpy(key->u.aes_gmac.rx_pn, ipn, 6);
1134 1213
1135 /* Remove MMIE */ 1214 /* Remove MMIE */
1136 skb_trim(skb, skb->len - sizeof(*mmie 1215 skb_trim(skb, skb->len - sizeof(*mmie));
1137 1216
1138 return RX_CONTINUE; 1217 return RX_CONTINUE;
>> 1218 }
>> 1219
>> 1220 ieee80211_tx_result
>> 1221 ieee80211_crypto_hw_encrypt(struct ieee80211_tx_data *tx)
>> 1222 {
>> 1223 struct sk_buff *skb;
>> 1224 struct ieee80211_tx_info *info = NULL;
>> 1225 ieee80211_tx_result res;
>> 1226
>> 1227 skb_queue_walk(&tx->skbs, skb) {
>> 1228 info = IEEE80211_SKB_CB(skb);
>> 1229
>> 1230 /* handle hw-only algorithm */
>> 1231 if (!info->control.hw_key)
>> 1232 return TX_DROP;
>> 1233
>> 1234 if (tx->key->flags & KEY_FLAG_CIPHER_SCHEME) {
>> 1235 res = ieee80211_crypto_cs_encrypt(tx, skb);
>> 1236 if (res != TX_CONTINUE)
>> 1237 return res;
>> 1238 }
>> 1239 }
>> 1240
>> 1241 ieee80211_tx_set_protected(tx);
>> 1242
>> 1243 return TX_CONTINUE;
>> 1244 }
>> 1245
>> 1246 ieee80211_rx_result
>> 1247 ieee80211_crypto_hw_decrypt(struct ieee80211_rx_data *rx)
>> 1248 {
>> 1249 if (rx->sta && rx->sta->cipher_scheme)
>> 1250 return ieee80211_crypto_cs_decrypt(rx);
>> 1251
>> 1252 return RX_DROP_UNUSABLE;
1139 } 1253 }
1140 1254
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