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 *
6 * Copyright (C) 2020-2023 Intel Corporation !! 5 * This program is free software; you can redistribute it and/or modify
>> 6 * it under the terms of the GNU General Public License version 2 as
>> 7 * published by the Free Software Foundation.
7 */ 8 */
8 9
9 #include <linux/netdevice.h> 10 #include <linux/netdevice.h>
10 #include <linux/types.h> 11 #include <linux/types.h>
11 #include <linux/skbuff.h> 12 #include <linux/skbuff.h>
12 #include <linux/compiler.h> 13 #include <linux/compiler.h>
13 #include <linux/ieee80211.h> 14 #include <linux/ieee80211.h>
14 #include <linux/gfp.h> 15 #include <linux/gfp.h>
15 #include <linux/unaligned.h> !! 16 #include <asm/unaligned.h>
16 #include <net/mac80211.h> 17 #include <net/mac80211.h>
17 #include <crypto/aes.h> 18 #include <crypto/aes.h>
18 #include <crypto/utils.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" <<
26 #include "aes_gcm.h" <<
27 #include "wpa.h" 25 #include "wpa.h"
28 26
29 ieee80211_tx_result 27 ieee80211_tx_result
30 ieee80211_tx_h_michael_mic_add(struct ieee8021 28 ieee80211_tx_h_michael_mic_add(struct ieee80211_tx_data *tx)
31 { 29 {
32 u8 *data, *key, *mic; 30 u8 *data, *key, *mic;
33 size_t data_len; 31 size_t data_len;
34 unsigned int hdrlen; 32 unsigned int hdrlen;
35 struct ieee80211_hdr *hdr; 33 struct ieee80211_hdr *hdr;
36 struct sk_buff *skb = tx->skb; 34 struct sk_buff *skb = tx->skb;
37 struct ieee80211_tx_info *info = IEEE8 35 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
38 int tail; 36 int tail;
39 37
40 hdr = (struct ieee80211_hdr *)skb->dat 38 hdr = (struct ieee80211_hdr *)skb->data;
41 if (!tx->key || tx->key->conf.cipher ! 39 if (!tx->key || tx->key->conf.cipher != WLAN_CIPHER_SUITE_TKIP ||
42 skb->len < 24 || !ieee80211_is_dat 40 skb->len < 24 || !ieee80211_is_data_present(hdr->frame_control))
43 return TX_CONTINUE; 41 return TX_CONTINUE;
44 42
45 hdrlen = ieee80211_hdrlen(hdr->frame_c 43 hdrlen = ieee80211_hdrlen(hdr->frame_control);
46 if (skb->len < hdrlen) 44 if (skb->len < hdrlen)
47 return TX_DROP; 45 return TX_DROP;
48 46
49 data = skb->data + hdrlen; 47 data = skb->data + hdrlen;
50 data_len = skb->len - hdrlen; 48 data_len = skb->len - hdrlen;
51 49
52 if (unlikely(info->flags & IEEE80211_T 50 if (unlikely(info->flags & IEEE80211_TX_INTFL_TKIP_MIC_FAILURE)) {
53 /* Need to use software crypto 51 /* Need to use software crypto for the test */
54 info->control.hw_key = NULL; 52 info->control.hw_key = NULL;
55 } 53 }
56 54
57 if (info->control.hw_key && 55 if (info->control.hw_key &&
58 (info->flags & IEEE80211_TX_CTL_DO 56 (info->flags & IEEE80211_TX_CTL_DONTFRAG ||
59 ieee80211_hw_check(&tx->local->hw !! 57 tx->local->ops->set_frag_threshold) &&
60 !(tx->key->conf.flags & (IEEE80211 !! 58 !(tx->key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_MMIC)) {
61 IEEE80211 !! 59 /* hwaccel - with no need for SW-generated MMIC */
62 /* hwaccel - with no need for <<
63 return TX_CONTINUE; 60 return TX_CONTINUE;
64 } 61 }
65 62
66 tail = MICHAEL_MIC_LEN; 63 tail = MICHAEL_MIC_LEN;
67 if (!info->control.hw_key) 64 if (!info->control.hw_key)
68 tail += IEEE80211_TKIP_ICV_LEN !! 65 tail += TKIP_ICV_LEN;
69 66
70 if (WARN(skb_tailroom(skb) < tail || !! 67 if (WARN_ON(skb_tailroom(skb) < tail ||
71 skb_headroom(skb) < IEEE80211 !! 68 skb_headroom(skb) < TKIP_IV_LEN))
72 "mmic: not enough head/tail ( <<
73 skb_headroom(skb), IEEE80211_ <<
74 skb_tailroom(skb), tail)) <<
75 return TX_DROP; 69 return TX_DROP;
76 70
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_ 71 key = &tx->key->conf.key[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY];
>> 72 mic = skb_put(skb, MICHAEL_MIC_LEN);
86 michael_mic(key, hdr, data, data_len, 73 michael_mic(key, hdr, data, data_len, mic);
87 if (unlikely(info->flags & IEEE80211_T 74 if (unlikely(info->flags & IEEE80211_TX_INTFL_TKIP_MIC_FAILURE))
88 mic[0]++; 75 mic[0]++;
89 76
90 return TX_CONTINUE; 77 return TX_CONTINUE;
91 } 78 }
92 79
93 80
94 ieee80211_rx_result 81 ieee80211_rx_result
95 ieee80211_rx_h_michael_mic_verify(struct ieee8 82 ieee80211_rx_h_michael_mic_verify(struct ieee80211_rx_data *rx)
96 { 83 {
97 u8 *data, *key = NULL; 84 u8 *data, *key = NULL;
98 size_t data_len; 85 size_t data_len;
99 unsigned int hdrlen; 86 unsigned int hdrlen;
100 u8 mic[MICHAEL_MIC_LEN]; 87 u8 mic[MICHAEL_MIC_LEN];
101 struct sk_buff *skb = rx->skb; 88 struct sk_buff *skb = rx->skb;
102 struct ieee80211_rx_status *status = I 89 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
103 struct ieee80211_hdr *hdr = (struct ie 90 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
104 91
105 /* 92 /*
106 * it makes no sense to check for MIC 93 * it makes no sense to check for MIC errors on anything other
107 * than data frames. 94 * than data frames.
108 */ 95 */
109 if (!ieee80211_is_data_present(hdr->fr 96 if (!ieee80211_is_data_present(hdr->frame_control))
110 return RX_CONTINUE; 97 return RX_CONTINUE;
111 98
112 /* 99 /*
113 * No way to verify the MIC if the har 100 * No way to verify the MIC if the hardware stripped it or
114 * the IV with the key index. In this 101 * the IV with the key index. In this case we have solely rely
115 * on the driver to set RX_FLAG_MMIC_E 102 * on the driver to set RX_FLAG_MMIC_ERROR in the event of a
116 * MIC failure report. 103 * MIC failure report.
117 */ 104 */
118 if (status->flag & (RX_FLAG_MMIC_STRIP 105 if (status->flag & (RX_FLAG_MMIC_STRIPPED | RX_FLAG_IV_STRIPPED)) {
119 if (status->flag & RX_FLAG_MMI 106 if (status->flag & RX_FLAG_MMIC_ERROR)
120 goto mic_fail_no_key; 107 goto mic_fail_no_key;
121 108
122 if (!(status->flag & RX_FLAG_I 109 if (!(status->flag & RX_FLAG_IV_STRIPPED) && rx->key &&
123 rx->key->conf.cipher == WL 110 rx->key->conf.cipher == WLAN_CIPHER_SUITE_TKIP)
124 goto update_iv; 111 goto update_iv;
125 112
126 return RX_CONTINUE; 113 return RX_CONTINUE;
127 } 114 }
128 115
129 /* 116 /*
130 * Some hardware seems to generate Mic 117 * Some hardware seems to generate Michael MIC failure reports; even
131 * though, the frame was not encrypted 118 * though, the frame was not encrypted with TKIP and therefore has no
132 * MIC. Ignore the flag them to avoid 119 * MIC. Ignore the flag them to avoid triggering countermeasures.
133 */ 120 */
134 if (!rx->key || rx->key->conf.cipher ! 121 if (!rx->key || rx->key->conf.cipher != WLAN_CIPHER_SUITE_TKIP ||
135 !(status->flag & RX_FLAG_DECRYPTED 122 !(status->flag & RX_FLAG_DECRYPTED))
136 return RX_CONTINUE; 123 return RX_CONTINUE;
137 124
138 if (rx->sdata->vif.type == NL80211_IFT 125 if (rx->sdata->vif.type == NL80211_IFTYPE_AP && rx->key->conf.keyidx) {
139 /* 126 /*
140 * APs with pairwise keys shou 127 * APs with pairwise keys should never receive Michael MIC
141 * errors for non-zero keyidx 128 * errors for non-zero keyidx because these are reserved for
142 * group keys and only the AP 129 * group keys and only the AP is sending real multicast
143 * frames in the BSS. !! 130 * frames in the BSS. (
144 */ 131 */
145 return RX_DROP_U_AP_RX_GROUPCA !! 132 return RX_DROP_UNUSABLE;
146 } 133 }
147 134
148 if (status->flag & RX_FLAG_MMIC_ERROR) 135 if (status->flag & RX_FLAG_MMIC_ERROR)
149 goto mic_fail; 136 goto mic_fail;
150 137
151 hdrlen = ieee80211_hdrlen(hdr->frame_c 138 hdrlen = ieee80211_hdrlen(hdr->frame_control);
152 if (skb->len < hdrlen + MICHAEL_MIC_LE 139 if (skb->len < hdrlen + MICHAEL_MIC_LEN)
153 return RX_DROP_U_SHORT_MMIC; !! 140 return RX_DROP_UNUSABLE;
154 141
155 if (skb_linearize(rx->skb)) 142 if (skb_linearize(rx->skb))
156 return RX_DROP_U_OOM; !! 143 return RX_DROP_UNUSABLE;
157 hdr = (void *)skb->data; 144 hdr = (void *)skb->data;
158 145
159 data = skb->data + hdrlen; 146 data = skb->data + hdrlen;
160 data_len = skb->len - hdrlen - MICHAEL 147 data_len = skb->len - hdrlen - MICHAEL_MIC_LEN;
161 key = &rx->key->conf.key[NL80211_TKIP_ 148 key = &rx->key->conf.key[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY];
162 michael_mic(key, hdr, data, data_len, 149 michael_mic(key, hdr, data, data_len, mic);
163 if (crypto_memneq(mic, data + data_len !! 150 if (memcmp(mic, data + data_len, MICHAEL_MIC_LEN) != 0)
164 goto mic_fail; 151 goto mic_fail;
165 152
166 /* remove Michael MIC from payload */ 153 /* remove Michael MIC from payload */
167 skb_trim(skb, skb->len - MICHAEL_MIC_L 154 skb_trim(skb, skb->len - MICHAEL_MIC_LEN);
168 155
169 update_iv: 156 update_iv:
170 /* update IV in key information to be 157 /* update IV in key information to be able to detect replays */
171 rx->key->u.tkip.rx[rx->security_idx].i !! 158 rx->key->u.tkip.rx[rx->security_idx].iv32 = rx->tkip_iv32;
172 rx->key->u.tkip.rx[rx->security_idx].i !! 159 rx->key->u.tkip.rx[rx->security_idx].iv16 = rx->tkip_iv16;
173 160
174 return RX_CONTINUE; 161 return RX_CONTINUE;
175 162
176 mic_fail: 163 mic_fail:
177 rx->key->u.tkip.mic_failures++; 164 rx->key->u.tkip.mic_failures++;
178 165
179 mic_fail_no_key: 166 mic_fail_no_key:
180 /* 167 /*
181 * In some cases the key can be unset 168 * In some cases the key can be unset - e.g. a multicast packet, in
182 * a driver that supports HW encryptio 169 * a driver that supports HW encryption. Send up the key idx only if
183 * the key is set. 170 * the key is set.
184 */ 171 */
185 cfg80211_michael_mic_failure(rx->sdata !! 172 mac80211_ev_michael_mic_failure(rx->sdata,
186 is_multic !! 173 rx->key ? rx->key->conf.keyidx : -1,
187 NL80211_K !! 174 (void *) skb->data, NULL, GFP_ATOMIC);
188 NL80211_K !! 175 return RX_DROP_UNUSABLE;
189 rx->key ? <<
190 NULL, GFP <<
191 return RX_DROP_U_MMIC_FAIL; <<
192 } 176 }
193 177
>> 178
194 static int tkip_encrypt_skb(struct ieee80211_t 179 static int tkip_encrypt_skb(struct ieee80211_tx_data *tx, struct sk_buff *skb)
195 { 180 {
196 struct ieee80211_hdr *hdr = (struct ie 181 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
197 struct ieee80211_key *key = tx->key; 182 struct ieee80211_key *key = tx->key;
198 struct ieee80211_tx_info *info = IEEE8 183 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
199 unsigned int hdrlen; 184 unsigned int hdrlen;
200 int len, tail; 185 int len, tail;
201 u64 pn; <<
202 u8 *pos; 186 u8 *pos;
203 187
204 if (info->control.hw_key && 188 if (info->control.hw_key &&
205 !(info->control.hw_key->flags & IE 189 !(info->control.hw_key->flags & IEEE80211_KEY_FLAG_GENERATE_IV) &&
206 !(info->control.hw_key->flags & IE 190 !(info->control.hw_key->flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE)) {
207 /* hwaccel - with no need for 191 /* hwaccel - with no need for software-generated IV */
208 return 0; 192 return 0;
209 } 193 }
210 194
211 hdrlen = ieee80211_hdrlen(hdr->frame_c 195 hdrlen = ieee80211_hdrlen(hdr->frame_control);
212 len = skb->len - hdrlen; 196 len = skb->len - hdrlen;
213 197
214 if (info->control.hw_key) 198 if (info->control.hw_key)
215 tail = 0; 199 tail = 0;
216 else 200 else
217 tail = IEEE80211_TKIP_ICV_LEN; !! 201 tail = TKIP_ICV_LEN;
218 202
219 if (WARN_ON(skb_tailroom(skb) < tail | 203 if (WARN_ON(skb_tailroom(skb) < tail ||
220 skb_headroom(skb) < IEEE80 !! 204 skb_headroom(skb) < TKIP_IV_LEN))
221 return -1; 205 return -1;
222 206
223 pos = skb_push(skb, IEEE80211_TKIP_IV_ !! 207 pos = skb_push(skb, TKIP_IV_LEN);
224 memmove(pos, pos + IEEE80211_TKIP_IV_L !! 208 memmove(pos, pos + TKIP_IV_LEN, hdrlen);
>> 209 skb_set_network_header(skb, skb_network_offset(skb) + TKIP_IV_LEN);
225 pos += hdrlen; 210 pos += hdrlen;
226 211
227 /* the HW only needs room for the IV, 212 /* the HW only needs room for the IV, but not the actual IV */
228 if (info->control.hw_key && 213 if (info->control.hw_key &&
229 (info->control.hw_key->flags & IEE 214 (info->control.hw_key->flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE))
230 return 0; 215 return 0;
231 216
232 /* Increase IV for the frame */ 217 /* Increase IV for the frame */
233 pn = atomic64_inc_return(&key->conf.tx !! 218 spin_lock(&key->u.tkip.txlock);
234 pos = ieee80211_tkip_add_iv(pos, &key- !! 219 key->u.tkip.tx.iv16++;
>> 220 if (key->u.tkip.tx.iv16 == 0)
>> 221 key->u.tkip.tx.iv32++;
>> 222 pos = ieee80211_tkip_add_iv(pos, key);
>> 223 spin_unlock(&key->u.tkip.txlock);
235 224
236 /* hwaccel - with software IV */ 225 /* hwaccel - with software IV */
237 if (info->control.hw_key) 226 if (info->control.hw_key)
238 return 0; 227 return 0;
239 228
240 /* Add room for ICV */ 229 /* Add room for ICV */
241 skb_put(skb, IEEE80211_TKIP_ICV_LEN); !! 230 skb_put(skb, TKIP_ICV_LEN);
242 231
243 return ieee80211_tkip_encrypt_data(&tx !! 232 return ieee80211_tkip_encrypt_data(tx->local->wep_tx_tfm,
244 key 233 key, skb, pos, len);
245 } 234 }
246 235
247 236
248 ieee80211_tx_result 237 ieee80211_tx_result
249 ieee80211_crypto_tkip_encrypt(struct ieee80211 238 ieee80211_crypto_tkip_encrypt(struct ieee80211_tx_data *tx)
250 { 239 {
251 struct sk_buff *skb; 240 struct sk_buff *skb;
252 241
253 ieee80211_tx_set_protected(tx); 242 ieee80211_tx_set_protected(tx);
254 243
255 skb_queue_walk(&tx->skbs, skb) { 244 skb_queue_walk(&tx->skbs, skb) {
256 if (tkip_encrypt_skb(tx, skb) 245 if (tkip_encrypt_skb(tx, skb) < 0)
257 return TX_DROP; 246 return TX_DROP;
258 } 247 }
259 248
260 return TX_CONTINUE; 249 return TX_CONTINUE;
261 } 250 }
262 251
263 252
264 ieee80211_rx_result 253 ieee80211_rx_result
265 ieee80211_crypto_tkip_decrypt(struct ieee80211 254 ieee80211_crypto_tkip_decrypt(struct ieee80211_rx_data *rx)
266 { 255 {
267 struct ieee80211_hdr *hdr = (struct ie 256 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) rx->skb->data;
268 int hdrlen, res, hwaccel = 0; 257 int hdrlen, res, hwaccel = 0;
269 struct ieee80211_key *key = rx->key; 258 struct ieee80211_key *key = rx->key;
270 struct sk_buff *skb = rx->skb; 259 struct sk_buff *skb = rx->skb;
271 struct ieee80211_rx_status *status = I 260 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
272 261
273 hdrlen = ieee80211_hdrlen(hdr->frame_c 262 hdrlen = ieee80211_hdrlen(hdr->frame_control);
274 263
275 if (!ieee80211_is_data(hdr->frame_cont 264 if (!ieee80211_is_data(hdr->frame_control))
276 return RX_CONTINUE; 265 return RX_CONTINUE;
277 266
278 if (!rx->sta || skb->len - hdrlen < 12 267 if (!rx->sta || skb->len - hdrlen < 12)
279 return RX_DROP_U_SHORT_TKIP; !! 268 return RX_DROP_UNUSABLE;
280 269
281 /* it may be possible to optimize this 270 /* it may be possible to optimize this a bit more */
282 if (skb_linearize(rx->skb)) 271 if (skb_linearize(rx->skb))
283 return RX_DROP_U_OOM; !! 272 return RX_DROP_UNUSABLE;
284 hdr = (void *)skb->data; 273 hdr = (void *)skb->data;
285 274
286 /* 275 /*
287 * Let TKIP code verify IV, but skip d 276 * Let TKIP code verify IV, but skip decryption.
288 * In the case where hardware checks t 277 * In the case where hardware checks the IV as well,
289 * we don't even get here, see ieee802 278 * we don't even get here, see ieee80211_rx_h_decrypt()
290 */ 279 */
291 if (status->flag & RX_FLAG_DECRYPTED) 280 if (status->flag & RX_FLAG_DECRYPTED)
292 hwaccel = 1; 281 hwaccel = 1;
293 282
294 res = ieee80211_tkip_decrypt_data(&rx- !! 283 res = ieee80211_tkip_decrypt_data(rx->local->wep_rx_tfm,
295 key, 284 key, skb->data + hdrlen,
296 skb- 285 skb->len - hdrlen, rx->sta->sta.addr,
297 hdr- 286 hdr->addr1, hwaccel, rx->security_idx,
298 &rx- !! 287 &rx->tkip_iv32,
299 &rx- !! 288 &rx->tkip_iv16);
300 if (res != TKIP_DECRYPT_OK) 289 if (res != TKIP_DECRYPT_OK)
301 return RX_DROP_U_TKIP_FAIL; !! 290 return RX_DROP_UNUSABLE;
302 291
303 /* Trim ICV */ 292 /* Trim ICV */
304 if (!(status->flag & RX_FLAG_ICV_STRIP !! 293 skb_trim(skb, skb->len - TKIP_ICV_LEN);
305 skb_trim(skb, skb->len - IEEE8 <<
306 294
307 /* Remove IV */ 295 /* Remove IV */
308 memmove(skb->data + IEEE80211_TKIP_IV_ !! 296 memmove(skb->data + TKIP_IV_LEN, skb->data, hdrlen);
309 skb_pull(skb, IEEE80211_TKIP_IV_LEN); !! 297 skb_pull(skb, TKIP_IV_LEN);
310 298
311 return RX_CONTINUE; 299 return RX_CONTINUE;
312 } 300 }
313 301
314 /* !! 302
315 * Calculate AAD for CCMP/GCMP, returning qos_ !! 303 static void ccmp_special_blocks(struct sk_buff *skb, u8 *pn, u8 *scratch,
316 * need that in CCMP also for b_0. !! 304 int encrypted)
317 */ <<
318 static u8 ccmp_gcmp_aad(struct sk_buff *skb, u <<
319 { 305 {
320 struct ieee80211_hdr *hdr = (void *)sk <<
321 __le16 mask_fc; 306 __le16 mask_fc;
322 int a4_included, mgmt; 307 int a4_included, mgmt;
323 u8 qos_tid; 308 u8 qos_tid;
324 u16 len_a = 22; !! 309 u8 *b_0, *aad;
>> 310 u16 data_len, len_a;
>> 311 unsigned int hdrlen;
>> 312 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
>> 313
>> 314 memset(scratch, 0, 6 * AES_BLOCK_SIZE);
>> 315
>> 316 b_0 = scratch + 3 * AES_BLOCK_SIZE;
>> 317 aad = scratch + 4 * AES_BLOCK_SIZE;
325 318
326 /* 319 /*
327 * Mask FC: zero subtype b4 b5 b6 (if 320 * Mask FC: zero subtype b4 b5 b6 (if not mgmt)
328 * Retry, PwrMgt, MoreData, Order (if !! 321 * Retry, PwrMgt, MoreData; set Protected
329 */ 322 */
330 mgmt = ieee80211_is_mgmt(hdr->frame_co 323 mgmt = ieee80211_is_mgmt(hdr->frame_control);
331 mask_fc = hdr->frame_control; 324 mask_fc = hdr->frame_control;
332 mask_fc &= ~cpu_to_le16(IEEE80211_FCTL 325 mask_fc &= ~cpu_to_le16(IEEE80211_FCTL_RETRY |
333 IEEE80211_FCTL 326 IEEE80211_FCTL_PM | IEEE80211_FCTL_MOREDATA);
334 if (!mgmt) 327 if (!mgmt)
335 mask_fc &= ~cpu_to_le16(0x0070 328 mask_fc &= ~cpu_to_le16(0x0070);
336 mask_fc |= cpu_to_le16(IEEE80211_FCTL_ 329 mask_fc |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
337 330
>> 331 hdrlen = ieee80211_hdrlen(hdr->frame_control);
>> 332 len_a = hdrlen - 2;
338 a4_included = ieee80211_has_a4(hdr->fr 333 a4_included = ieee80211_has_a4(hdr->frame_control);
339 if (a4_included) <<
340 len_a += 6; <<
341 334
342 if (ieee80211_is_data_qos(hdr->frame_c !! 335 if (ieee80211_is_data_qos(hdr->frame_control))
343 qos_tid = *ieee80211_get_qos_c !! 336 qos_tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK;
>> 337 else
>> 338 qos_tid = 0;
344 339
345 if (spp_amsdu) !! 340 data_len = skb->len - hdrlen - CCMP_HDR_LEN;
346 qos_tid &= IEEE80211_Q !! 341 if (encrypted)
347 IEEE80211_Q !! 342 data_len -= CCMP_MIC_LEN;
348 else <<
349 qos_tid &= IEEE80211_Q <<
350 343
351 mask_fc &= ~cpu_to_le16(IEEE80 !! 344 /* First block, b_0 */
352 len_a += 2; !! 345 b_0[0] = 0x59; /* flags: Adata: 1, M: 011, L: 001 */
353 } else { !! 346 /* Nonce: Nonce Flags | A2 | PN
354 qos_tid = 0; !! 347 * Nonce Flags: Priority (b0..b3) | Management (b4) | Reserved (b5..b7)
355 } !! 348 */
>> 349 b_0[1] = qos_tid | (mgmt << 4);
>> 350 memcpy(&b_0[2], hdr->addr2, ETH_ALEN);
>> 351 memcpy(&b_0[8], pn, CCMP_PN_LEN);
>> 352 /* l(m) */
>> 353 put_unaligned_be16(data_len, &b_0[14]);
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 <<
428 { 401 {
429 struct ieee80211_hdr *hdr = (struct ie 402 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
430 struct ieee80211_key *key = tx->key; 403 struct ieee80211_key *key = tx->key;
431 struct ieee80211_tx_info *info = IEEE8 404 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
432 int hdrlen, len, tail; 405 int hdrlen, len, tail;
433 u8 *pos; 406 u8 *pos;
434 u8 pn[6]; 407 u8 pn[6];
435 u64 pn64; 408 u64 pn64;
436 u8 aad[CCM_AAD_LEN]; !! 409 u8 scratch[6 * AES_BLOCK_SIZE];
437 u8 b_0[AES_BLOCK_SIZE]; <<
438 410
439 if (info->control.hw_key && 411 if (info->control.hw_key &&
440 !(info->control.hw_key->flags & IE 412 !(info->control.hw_key->flags & IEEE80211_KEY_FLAG_GENERATE_IV) &&
441 !(info->control.hw_key->flags & IE !! 413 !(info->control.hw_key->flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE)) {
442 !((info->control.hw_key->flags & <<
443 IEEE80211_KEY_FLAG_GENERATE_IV_ <<
444 ieee80211_is_mgmt(hdr->frame_con <<
445 /* 414 /*
446 * hwaccel has no need for pre 415 * hwaccel has no need for preallocated room for CCMP
447 * header or MIC fields 416 * header or MIC fields
448 */ 417 */
449 return 0; 418 return 0;
450 } 419 }
451 420
452 hdrlen = ieee80211_hdrlen(hdr->frame_c 421 hdrlen = ieee80211_hdrlen(hdr->frame_control);
453 len = skb->len - hdrlen; 422 len = skb->len - hdrlen;
454 423
455 if (info->control.hw_key) 424 if (info->control.hw_key)
456 tail = 0; 425 tail = 0;
457 else 426 else
458 tail = mic_len; !! 427 tail = CCMP_MIC_LEN;
459 428
460 if (WARN_ON(skb_tailroom(skb) < tail | 429 if (WARN_ON(skb_tailroom(skb) < tail ||
461 skb_headroom(skb) < IEEE80 !! 430 skb_headroom(skb) < CCMP_HDR_LEN))
462 return -1; 431 return -1;
463 432
464 pos = skb_push(skb, IEEE80211_CCMP_HDR !! 433 pos = skb_push(skb, CCMP_HDR_LEN);
465 memmove(pos, pos + IEEE80211_CCMP_HDR_ !! 434 memmove(pos, pos + CCMP_HDR_LEN, hdrlen);
>> 435 skb_set_network_header(skb, skb_network_offset(skb) + CCMP_HDR_LEN);
466 436
467 /* the HW only needs room for the IV, 437 /* the HW only needs room for the IV, but not the actual IV */
468 if (info->control.hw_key && 438 if (info->control.hw_key &&
469 (info->control.hw_key->flags & IEE 439 (info->control.hw_key->flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE))
470 return 0; 440 return 0;
471 441
>> 442 hdr = (struct ieee80211_hdr *) pos;
472 pos += hdrlen; 443 pos += hdrlen;
473 444
474 pn64 = atomic64_inc_return(&key->conf. !! 445 pn64 = atomic64_inc_return(&key->u.ccmp.tx_pn);
475 446
476 pn[5] = pn64; 447 pn[5] = pn64;
477 pn[4] = pn64 >> 8; 448 pn[4] = pn64 >> 8;
478 pn[3] = pn64 >> 16; 449 pn[3] = pn64 >> 16;
479 pn[2] = pn64 >> 24; 450 pn[2] = pn64 >> 24;
480 pn[1] = pn64 >> 32; 451 pn[1] = pn64 >> 32;
481 pn[0] = pn64 >> 40; 452 pn[0] = pn64 >> 40;
482 453
483 ccmp_pn2hdr(pos, pn, key->conf.keyidx) 454 ccmp_pn2hdr(pos, pn, key->conf.keyidx);
484 455
485 /* hwaccel - with software CCMP header 456 /* hwaccel - with software CCMP header */
486 if (info->control.hw_key) 457 if (info->control.hw_key)
487 return 0; 458 return 0;
488 459
489 pos += IEEE80211_CCMP_HDR_LEN; !! 460 pos += CCMP_HDR_LEN;
490 ccmp_special_blocks(skb, pn, b_0, aad, !! 461 ccmp_special_blocks(skb, pn, scratch, 0);
491 key->conf.flags & !! 462 ieee80211_aes_ccm_encrypt(key->u.ccmp.tfm, scratch, pos, len,
492 return ieee80211_aes_ccm_encrypt(key-> !! 463 pos, skb_put(skb, CCMP_MIC_LEN));
493 skb_p !! 464
>> 465 return 0;
494 } 466 }
495 467
496 468
497 ieee80211_tx_result 469 ieee80211_tx_result
498 ieee80211_crypto_ccmp_encrypt(struct ieee80211 !! 470 ieee80211_crypto_ccmp_encrypt(struct ieee80211_tx_data *tx)
499 unsigned int mic <<
500 { 471 {
501 struct sk_buff *skb; 472 struct sk_buff *skb;
502 473
503 ieee80211_tx_set_protected(tx); 474 ieee80211_tx_set_protected(tx);
504 475
505 skb_queue_walk(&tx->skbs, skb) { 476 skb_queue_walk(&tx->skbs, skb) {
506 if (ccmp_encrypt_skb(tx, skb, !! 477 if (ccmp_encrypt_skb(tx, skb) < 0)
507 return TX_DROP; 478 return TX_DROP;
508 } 479 }
509 480
510 return TX_CONTINUE; 481 return TX_CONTINUE;
511 } 482 }
512 483
513 484
514 ieee80211_rx_result 485 ieee80211_rx_result
515 ieee80211_crypto_ccmp_decrypt(struct ieee80211 !! 486 ieee80211_crypto_ccmp_decrypt(struct ieee80211_rx_data *rx)
516 unsigned int mic <<
517 { 487 {
518 struct ieee80211_hdr *hdr = (struct ie 488 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data;
519 int hdrlen; 489 int hdrlen;
520 struct ieee80211_key *key = rx->key; 490 struct ieee80211_key *key = rx->key;
521 struct sk_buff *skb = rx->skb; 491 struct sk_buff *skb = rx->skb;
522 struct ieee80211_rx_status *status = I 492 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
523 u8 pn[IEEE80211_CCMP_PN_LEN]; !! 493 u8 pn[CCMP_PN_LEN];
524 int data_len; 494 int data_len;
525 int queue; 495 int queue;
526 496
527 hdrlen = ieee80211_hdrlen(hdr->frame_c 497 hdrlen = ieee80211_hdrlen(hdr->frame_control);
528 498
529 if (!ieee80211_is_data(hdr->frame_cont 499 if (!ieee80211_is_data(hdr->frame_control) &&
530 !ieee80211_is_robust_mgmt_frame(sk !! 500 !ieee80211_is_robust_mgmt_frame(hdr))
531 return RX_CONTINUE; 501 return RX_CONTINUE;
532 502
533 if (status->flag & RX_FLAG_DECRYPTED) !! 503 data_len = skb->len - hdrlen - CCMP_HDR_LEN - CCMP_MIC_LEN;
534 if (!pskb_may_pull(rx->skb, hd <<
535 return RX_DROP_U_SHORT <<
536 if (status->flag & RX_FLAG_MIC <<
537 mic_len = 0; <<
538 } else { <<
539 if (skb_linearize(rx->skb)) <<
540 return RX_DROP_U_OOM; <<
541 } <<
542 <<
543 /* reload hdr - skb might have been re <<
544 hdr = (void *)rx->skb->data; <<
545 <<
546 data_len = skb->len - hdrlen - IEEE802 <<
547 if (!rx->sta || data_len < 0) 504 if (!rx->sta || data_len < 0)
548 return RX_DROP_U_SHORT_CCMP; !! 505 return RX_DROP_UNUSABLE;
549 <<
550 if (!(status->flag & RX_FLAG_PN_VALIDA <<
551 int res; <<
552 <<
553 ccmp_hdr2pn(pn, skb->data + hd <<
554 <<
555 queue = rx->security_idx; <<
556 <<
557 res = memcmp(pn, key->u.ccmp.r <<
558 IEEE80211_CCMP_PN <<
559 if (res < 0 || <<
560 (!res && !(status->flag & <<
561 key->u.ccmp.replays++; <<
562 return RX_DROP_U_REPLA <<
563 } <<
564 <<
565 if (!(status->flag & RX_FLAG_D <<
566 u8 aad[2 * AES_BLOCK_S <<
567 u8 b_0[AES_BLOCK_SIZE] <<
568 /* hardware didn't dec <<
569 ccmp_special_blocks(sk <<
570 ke <<
571 <<
572 if (ieee80211_aes_ccm_ <<
573 key->u.ccm <<
574 skb->data <<
575 data_len, <<
576 skb->data <<
577 return RX_DROP <<
578 } <<
579 <<
580 memcpy(key->u.ccmp.rx_pn[queue <<
581 if (unlikely(ieee80211_is_frag <<
582 memcpy(rx->ccm_gcm.pn, <<
583 } <<
584 <<
585 /* Remove CCMP header and MIC */ <<
586 if (pskb_trim(skb, skb->len - mic_len) <<
587 return RX_DROP_U_SHORT_CCMP_MI <<
588 memmove(skb->data + IEEE80211_CCMP_HDR <<
589 skb_pull(skb, IEEE80211_CCMP_HDR_LEN); <<
590 <<
591 return RX_CONTINUE; <<
592 } <<
593 <<
594 static void gcmp_special_blocks(struct sk_buff <<
595 bool spp_amsdu <<
596 { <<
597 struct ieee80211_hdr *hdr = (void *)sk <<
598 <<
599 memcpy(j_0, hdr->addr2, ETH_ALEN); <<
600 memcpy(&j_0[ETH_ALEN], pn, IEEE80211_G <<
601 j_0[13] = 0; <<
602 j_0[14] = 0; <<
603 j_0[AES_BLOCK_SIZE - 1] = 0x01; <<
604 <<
605 ccmp_gcmp_aad(skb, aad, spp_amsdu); <<
606 } <<
607 <<
608 static inline void gcmp_pn2hdr(u8 *hdr, const <<
609 { <<
610 hdr[0] = pn[5]; <<
611 hdr[1] = pn[4]; <<
612 hdr[2] = 0; <<
613 hdr[3] = 0x20 | (key_id << 6); <<
614 hdr[4] = pn[3]; <<
615 hdr[5] = pn[2]; <<
616 hdr[6] = pn[1]; <<
617 hdr[7] = pn[0]; <<
618 } <<
619 <<
620 static inline void gcmp_hdr2pn(u8 *pn, const u <<
621 { <<
622 pn[0] = hdr[7]; <<
623 pn[1] = hdr[6]; <<
624 pn[2] = hdr[5]; <<
625 pn[3] = hdr[4]; <<
626 pn[4] = hdr[1]; <<
627 pn[5] = hdr[0]; <<
628 } <<
629 <<
630 static int gcmp_encrypt_skb(struct ieee80211_t <<
631 { <<
632 struct ieee80211_hdr *hdr = (struct ie <<
633 struct ieee80211_key *key = tx->key; <<
634 struct ieee80211_tx_info *info = IEEE8 <<
635 int hdrlen, len, tail; <<
636 u8 *pos; <<
637 u8 pn[6]; <<
638 u64 pn64; <<
639 u8 aad[GCM_AAD_LEN]; <<
640 u8 j_0[AES_BLOCK_SIZE]; <<
641 <<
642 if (info->control.hw_key && <<
643 !(info->control.hw_key->flags & IE <<
644 !(info->control.hw_key->flags & IE <<
645 !((info->control.hw_key->flags & <<
646 IEEE80211_KEY_FLAG_GENERATE_IV_ <<
647 ieee80211_is_mgmt(hdr->frame_con <<
648 /* hwaccel has no need for pre <<
649 * header or MIC fields <<
650 */ <<
651 return 0; <<
652 } <<
653 <<
654 hdrlen = ieee80211_hdrlen(hdr->frame_c <<
655 len = skb->len - hdrlen; <<
656 <<
657 if (info->control.hw_key) <<
658 tail = 0; <<
659 else <<
660 tail = IEEE80211_GCMP_MIC_LEN; <<
661 <<
662 if (WARN_ON(skb_tailroom(skb) < tail | <<
663 skb_headroom(skb) < IEEE80 <<
664 return -1; <<
665 <<
666 pos = skb_push(skb, IEEE80211_GCMP_HDR <<
667 memmove(pos, pos + IEEE80211_GCMP_HDR_ <<
668 skb_set_network_header(skb, skb_networ <<
669 IEEE80211_ <<
670 <<
671 /* the HW only needs room for the IV, <<
672 if (info->control.hw_key && <<
673 (info->control.hw_key->flags & IEE <<
674 return 0; <<
675 <<
676 pos += hdrlen; <<
677 <<
678 pn64 = atomic64_inc_return(&key->conf. <<
679 <<
680 pn[5] = pn64; <<
681 pn[4] = pn64 >> 8; <<
682 pn[3] = pn64 >> 16; <<
683 pn[2] = pn64 >> 24; <<
684 pn[1] = pn64 >> 32; <<
685 pn[0] = pn64 >> 40; <<
686 <<
687 gcmp_pn2hdr(pos, pn, key->conf.keyidx) <<
688 <<
689 /* hwaccel - with software GCMP header <<
690 if (info->control.hw_key) <<
691 return 0; <<
692 <<
693 pos += IEEE80211_GCMP_HDR_LEN; <<
694 gcmp_special_blocks(skb, pn, j_0, aad, <<
695 key->conf.flags & <<
696 return ieee80211_aes_gcm_encrypt(key-> <<
697 skb_p <<
698 } <<
699 <<
700 ieee80211_tx_result <<
701 ieee80211_crypto_gcmp_encrypt(struct ieee80211 <<
702 { <<
703 struct sk_buff *skb; <<
704 <<
705 ieee80211_tx_set_protected(tx); <<
706 <<
707 skb_queue_walk(&tx->skbs, skb) { <<
708 if (gcmp_encrypt_skb(tx, skb) <<
709 return TX_DROP; <<
710 } <<
711 <<
712 return TX_CONTINUE; <<
713 } <<
714 <<
715 ieee80211_rx_result <<
716 ieee80211_crypto_gcmp_decrypt(struct ieee80211 <<
717 { <<
718 struct ieee80211_hdr *hdr = (struct ie <<
719 int hdrlen; <<
720 struct ieee80211_key *key = rx->key; <<
721 struct sk_buff *skb = rx->skb; <<
722 struct ieee80211_rx_status *status = I <<
723 u8 pn[IEEE80211_GCMP_PN_LEN]; <<
724 int data_len, queue, mic_len = IEEE802 <<
725 <<
726 hdrlen = ieee80211_hdrlen(hdr->frame_c <<
727 <<
728 if (!ieee80211_is_data(hdr->frame_cont <<
729 !ieee80211_is_robust_mgmt_frame(sk <<
730 return RX_CONTINUE; <<
731 506
732 if (status->flag & RX_FLAG_DECRYPTED) 507 if (status->flag & RX_FLAG_DECRYPTED) {
733 if (!pskb_may_pull(rx->skb, hd !! 508 if (!pskb_may_pull(rx->skb, hdrlen + CCMP_HDR_LEN))
734 return RX_DROP_U_SHORT !! 509 return RX_DROP_UNUSABLE;
735 if (status->flag & RX_FLAG_MIC <<
736 mic_len = 0; <<
737 } else { 510 } else {
738 if (skb_linearize(rx->skb)) 511 if (skb_linearize(rx->skb))
739 return RX_DROP_U_OOM; !! 512 return RX_DROP_UNUSABLE;
740 } 513 }
741 514
742 /* reload hdr - skb might have been re !! 515 ccmp_hdr2pn(pn, skb->data + hdrlen);
743 hdr = (void *)rx->skb->data; <<
744 516
745 data_len = skb->len - hdrlen - IEEE802 !! 517 queue = rx->security_idx;
746 if (!rx->sta || data_len < 0) <<
747 return RX_DROP_U_SHORT_GCMP; <<
748 <<
749 if (!(status->flag & RX_FLAG_PN_VALIDA <<
750 int res; <<
751 <<
752 gcmp_hdr2pn(pn, skb->data + hd <<
753 518
754 queue = rx->security_idx; !! 519 if (memcmp(pn, key->u.ccmp.rx_pn[queue], CCMP_PN_LEN) <= 0) {
755 !! 520 key->u.ccmp.replays++;
756 res = memcmp(pn, key->u.gcmp.r !! 521 return RX_DROP_UNUSABLE;
757 IEEE80211_GCMP_PN !! 522 }
758 if (res < 0 || <<
759 (!res && !(status->flag & <<
760 key->u.gcmp.replays++; <<
761 return RX_DROP_U_REPLA <<
762 } <<
763 523
764 if (!(status->flag & RX_FLAG_D !! 524 if (!(status->flag & RX_FLAG_DECRYPTED)) {
765 u8 aad[2 * AES_BLOCK_S !! 525 u8 scratch[6 * AES_BLOCK_SIZE];
766 u8 j_0[AES_BLOCK_SIZE] !! 526 /* hardware didn't decrypt/verify MIC */
767 /* hardware didn't dec !! 527 ccmp_special_blocks(skb, pn, scratch, 1);
768 gcmp_special_blocks(sk <<
769 ke <<
770 <<
771 if (ieee80211_aes_gcm_ <<
772 key->u.gcm <<
773 skb->data <<
774 data_len, <<
775 skb->data <<
776 IEEE80211_ <<
777 return RX_DROP <<
778 } <<
779 528
780 memcpy(key->u.gcmp.rx_pn[queue !! 529 if (ieee80211_aes_ccm_decrypt(
781 if (unlikely(ieee80211_is_frag !! 530 key->u.ccmp.tfm, scratch,
782 memcpy(rx->ccm_gcm.pn, !! 531 skb->data + hdrlen + CCMP_HDR_LEN, data_len,
>> 532 skb->data + skb->len - CCMP_MIC_LEN,
>> 533 skb->data + hdrlen + CCMP_HDR_LEN))
>> 534 return RX_DROP_UNUSABLE;
783 } 535 }
784 536
785 /* Remove GCMP header and MIC */ !! 537 memcpy(key->u.ccmp.rx_pn[queue], pn, CCMP_PN_LEN);
786 if (pskb_trim(skb, skb->len - mic_len) !! 538
787 return RX_DROP_U_SHORT_GCMP_MI !! 539 /* Remove CCMP header and MIC */
788 memmove(skb->data + IEEE80211_GCMP_HDR !! 540 if (pskb_trim(skb, skb->len - CCMP_MIC_LEN))
789 skb_pull(skb, IEEE80211_GCMP_HDR_LEN); !! 541 return RX_DROP_UNUSABLE;
>> 542 memmove(skb->data + CCMP_HDR_LEN, skb->data, hdrlen);
>> 543 skb_pull(skb, CCMP_HDR_LEN);
790 544
791 return RX_CONTINUE; 545 return RX_CONTINUE;
792 } 546 }
793 547
>> 548
794 static void bip_aad(struct sk_buff *skb, u8 *a 549 static void bip_aad(struct sk_buff *skb, u8 *aad)
795 { 550 {
796 __le16 mask_fc; 551 __le16 mask_fc;
797 struct ieee80211_hdr *hdr = (struct ie 552 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
798 553
799 /* BIP AAD: FC(masked) || A1 || A2 || 554 /* BIP AAD: FC(masked) || A1 || A2 || A3 */
800 555
801 /* FC type/subtype */ 556 /* FC type/subtype */
802 /* Mask FC Retry, PwrMgt, MoreData fla 557 /* Mask FC Retry, PwrMgt, MoreData flags to zero */
803 mask_fc = hdr->frame_control; 558 mask_fc = hdr->frame_control;
804 mask_fc &= ~cpu_to_le16(IEEE80211_FCTL 559 mask_fc &= ~cpu_to_le16(IEEE80211_FCTL_RETRY | IEEE80211_FCTL_PM |
805 IEEE80211_FCTL 560 IEEE80211_FCTL_MOREDATA);
806 put_unaligned(mask_fc, (__le16 *) &aad 561 put_unaligned(mask_fc, (__le16 *) &aad[0]);
807 /* A1 || A2 || A3 */ 562 /* A1 || A2 || A3 */
808 memcpy(aad + 2, &hdr->addrs, 3 * ETH_A !! 563 memcpy(aad + 2, &hdr->addr1, 3 * ETH_ALEN);
809 } 564 }
810 565
811 566
812 static inline void bip_ipn_set64(u8 *d, u64 pn 567 static inline void bip_ipn_set64(u8 *d, u64 pn)
813 { 568 {
814 *d++ = pn; 569 *d++ = pn;
815 *d++ = pn >> 8; 570 *d++ = pn >> 8;
816 *d++ = pn >> 16; 571 *d++ = pn >> 16;
817 *d++ = pn >> 24; 572 *d++ = pn >> 24;
818 *d++ = pn >> 32; 573 *d++ = pn >> 32;
819 *d = pn >> 40; 574 *d = pn >> 40;
820 } 575 }
821 576
822 static inline void bip_ipn_swap(u8 *d, const u 577 static inline void bip_ipn_swap(u8 *d, const u8 *s)
823 { 578 {
824 *d++ = s[5]; 579 *d++ = s[5];
825 *d++ = s[4]; 580 *d++ = s[4];
826 *d++ = s[3]; 581 *d++ = s[3];
827 *d++ = s[2]; 582 *d++ = s[2];
828 *d++ = s[1]; 583 *d++ = s[1];
829 *d = s[0]; 584 *d = s[0];
830 } 585 }
831 586
832 587
833 ieee80211_tx_result 588 ieee80211_tx_result
834 ieee80211_crypto_aes_cmac_encrypt(struct ieee8 589 ieee80211_crypto_aes_cmac_encrypt(struct ieee80211_tx_data *tx)
835 { 590 {
836 struct sk_buff *skb; 591 struct sk_buff *skb;
837 struct ieee80211_tx_info *info; 592 struct ieee80211_tx_info *info;
838 struct ieee80211_key *key = tx->key; 593 struct ieee80211_key *key = tx->key;
839 struct ieee80211_mmie *mmie; 594 struct ieee80211_mmie *mmie;
840 u8 aad[20]; 595 u8 aad[20];
841 u64 pn64; 596 u64 pn64;
842 597
843 if (WARN_ON(skb_queue_len(&tx->skbs) ! 598 if (WARN_ON(skb_queue_len(&tx->skbs) != 1))
844 return TX_DROP; 599 return TX_DROP;
845 600
846 skb = skb_peek(&tx->skbs); 601 skb = skb_peek(&tx->skbs);
847 602
848 info = IEEE80211_SKB_CB(skb); 603 info = IEEE80211_SKB_CB(skb);
849 604
850 if (info->control.hw_key && !! 605 if (info->control.hw_key)
851 !(key->conf.flags & IEEE80211_KEY_ <<
852 return TX_CONTINUE; 606 return TX_CONTINUE;
853 607
854 if (WARN_ON(skb_tailroom(skb) < sizeof 608 if (WARN_ON(skb_tailroom(skb) < sizeof(*mmie)))
855 return TX_DROP; 609 return TX_DROP;
856 610
857 mmie = skb_put(skb, sizeof(*mmie)); !! 611 mmie = (struct ieee80211_mmie *) skb_put(skb, sizeof(*mmie));
858 mmie->element_id = WLAN_EID_MMIE; 612 mmie->element_id = WLAN_EID_MMIE;
859 mmie->length = sizeof(*mmie) - 2; 613 mmie->length = sizeof(*mmie) - 2;
860 mmie->key_id = cpu_to_le16(key->conf.k 614 mmie->key_id = cpu_to_le16(key->conf.keyidx);
861 615
862 /* PN = PN + 1 */ 616 /* PN = PN + 1 */
863 pn64 = atomic64_inc_return(&key->conf. !! 617 pn64 = atomic64_inc_return(&key->u.aes_cmac.tx_pn);
864 618
865 bip_ipn_set64(mmie->sequence_number, p 619 bip_ipn_set64(mmie->sequence_number, pn64);
866 620
867 if (info->control.hw_key) <<
868 return TX_CONTINUE; <<
869 <<
870 bip_aad(skb, aad); 621 bip_aad(skb, aad);
871 622
872 /* 623 /*
873 * MIC = AES-128-CMAC(IGTK, AAD || Man 624 * MIC = AES-128-CMAC(IGTK, AAD || Management Frame Body || MMIE, 64)
874 */ 625 */
875 ieee80211_aes_cmac(key->u.aes_cmac.tfm 626 ieee80211_aes_cmac(key->u.aes_cmac.tfm, aad,
876 skb->data + 24, skb 627 skb->data + 24, skb->len - 24, mmie->mic);
877 628
878 return TX_CONTINUE; 629 return TX_CONTINUE;
879 } 630 }
880 631
881 ieee80211_tx_result <<
882 ieee80211_crypto_aes_cmac_256_encrypt(struct i <<
883 { <<
884 struct sk_buff *skb; <<
885 struct ieee80211_tx_info *info; <<
886 struct ieee80211_key *key = tx->key; <<
887 struct ieee80211_mmie_16 *mmie; <<
888 u8 aad[20]; <<
889 u64 pn64; <<
890 <<
891 if (WARN_ON(skb_queue_len(&tx->skbs) ! <<
892 return TX_DROP; <<
893 <<
894 skb = skb_peek(&tx->skbs); <<
895 <<
896 info = IEEE80211_SKB_CB(skb); <<
897 <<
898 if (info->control.hw_key && <<
899 !(key->conf.flags & IEEE80211_KEY_ <<
900 return TX_CONTINUE; <<
901 <<
902 if (WARN_ON(skb_tailroom(skb) < sizeof <<
903 return TX_DROP; <<
904 <<
905 mmie = skb_put(skb, sizeof(*mmie)); <<
906 mmie->element_id = WLAN_EID_MMIE; <<
907 mmie->length = sizeof(*mmie) - 2; <<
908 mmie->key_id = cpu_to_le16(key->conf.k <<
909 <<
910 /* PN = PN + 1 */ <<
911 pn64 = atomic64_inc_return(&key->conf. <<
912 <<
913 bip_ipn_set64(mmie->sequence_number, p <<
914 <<
915 if (info->control.hw_key) <<
916 return TX_CONTINUE; <<
917 <<
918 bip_aad(skb, aad); <<
919 <<
920 /* MIC = AES-256-CMAC(IGTK, AAD || Man <<
921 */ <<
922 ieee80211_aes_cmac_256(key->u.aes_cmac <<
923 skb->data + 24, <<
924 <<
925 return TX_CONTINUE; <<
926 } <<
927 632
928 ieee80211_rx_result 633 ieee80211_rx_result
929 ieee80211_crypto_aes_cmac_decrypt(struct ieee8 634 ieee80211_crypto_aes_cmac_decrypt(struct ieee80211_rx_data *rx)
930 { 635 {
931 struct sk_buff *skb = rx->skb; 636 struct sk_buff *skb = rx->skb;
932 struct ieee80211_rx_status *status = I 637 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
933 struct ieee80211_key *key = rx->key; 638 struct ieee80211_key *key = rx->key;
934 struct ieee80211_mmie *mmie; 639 struct ieee80211_mmie *mmie;
935 u8 aad[20], mic[8], ipn[6]; 640 u8 aad[20], mic[8], ipn[6];
936 struct ieee80211_hdr *hdr = (struct ie 641 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
937 642
938 if (!ieee80211_is_mgmt(hdr->frame_cont 643 if (!ieee80211_is_mgmt(hdr->frame_control))
939 return RX_CONTINUE; 644 return RX_CONTINUE;
940 645
941 /* management frames are already linea 646 /* management frames are already linear */
942 647
943 if (skb->len < 24 + sizeof(*mmie)) 648 if (skb->len < 24 + sizeof(*mmie))
944 return RX_DROP_U_SHORT_CMAC; !! 649 return RX_DROP_UNUSABLE;
945 650
946 mmie = (struct ieee80211_mmie *) 651 mmie = (struct ieee80211_mmie *)
947 (skb->data + skb->len - sizeof 652 (skb->data + skb->len - sizeof(*mmie));
948 if (mmie->element_id != WLAN_EID_MMIE 653 if (mmie->element_id != WLAN_EID_MMIE ||
949 mmie->length != sizeof(*mmie) - 2) 654 mmie->length != sizeof(*mmie) - 2)
950 return RX_DROP_U_BAD_MMIE; /* !! 655 return RX_DROP_UNUSABLE; /* Invalid MMIE */
951 656
952 bip_ipn_swap(ipn, mmie->sequence_numbe 657 bip_ipn_swap(ipn, mmie->sequence_number);
953 658
954 if (memcmp(ipn, key->u.aes_cmac.rx_pn, 659 if (memcmp(ipn, key->u.aes_cmac.rx_pn, 6) <= 0) {
955 key->u.aes_cmac.replays++; 660 key->u.aes_cmac.replays++;
956 return RX_DROP_U_REPLAY; !! 661 return RX_DROP_UNUSABLE;
957 } 662 }
958 663
959 if (!(status->flag & RX_FLAG_DECRYPTED 664 if (!(status->flag & RX_FLAG_DECRYPTED)) {
960 /* hardware didn't decrypt/ver 665 /* hardware didn't decrypt/verify MIC */
961 bip_aad(skb, aad); 666 bip_aad(skb, aad);
962 ieee80211_aes_cmac(key->u.aes_ 667 ieee80211_aes_cmac(key->u.aes_cmac.tfm, aad,
963 skb->data + 668 skb->data + 24, skb->len - 24, mic);
964 if (crypto_memneq(mic, mmie->m !! 669 if (memcmp(mic, mmie->mic, sizeof(mmie->mic)) != 0) {
965 key->u.aes_cmac.icverr 670 key->u.aes_cmac.icverrors++;
966 return RX_DROP_U_MIC_F !! 671 return RX_DROP_UNUSABLE;
967 } <<
968 } <<
969 <<
970 memcpy(key->u.aes_cmac.rx_pn, ipn, 6); <<
971 <<
972 /* Remove MMIE */ <<
973 skb_trim(skb, skb->len - sizeof(*mmie) <<
974 <<
975 return RX_CONTINUE; <<
976 } <<
977 <<
978 ieee80211_rx_result <<
979 ieee80211_crypto_aes_cmac_256_decrypt(struct i <<
980 { <<
981 struct sk_buff *skb = rx->skb; <<
982 struct ieee80211_rx_status *status = I <<
983 struct ieee80211_key *key = rx->key; <<
984 struct ieee80211_mmie_16 *mmie; <<
985 u8 aad[20], mic[16], ipn[6]; <<
986 struct ieee80211_hdr *hdr = (struct ie <<
987 <<
988 if (!ieee80211_is_mgmt(hdr->frame_cont <<
989 return RX_CONTINUE; <<
990 <<
991 /* management frames are already linea <<
992 <<
993 if (skb->len < 24 + sizeof(*mmie)) <<
994 return RX_DROP_U_SHORT_CMAC256 <<
995 <<
996 mmie = (struct ieee80211_mmie_16 *) <<
997 (skb->data + skb->len - sizeof <<
998 if (mmie->element_id != WLAN_EID_MMIE <<
999 mmie->length != sizeof(*mmie) - 2) <<
1000 return RX_DROP_U_BAD_MMIE; /* <<
1001 <<
1002 bip_ipn_swap(ipn, mmie->sequence_numb <<
1003 <<
1004 if (memcmp(ipn, key->u.aes_cmac.rx_pn <<
1005 key->u.aes_cmac.replays++; <<
1006 return RX_DROP_U_REPLAY; <<
1007 } <<
1008 <<
1009 if (!(status->flag & RX_FLAG_DECRYPTE <<
1010 /* hardware didn't decrypt/ve <<
1011 bip_aad(skb, aad); <<
1012 ieee80211_aes_cmac_256(key->u <<
1013 skb->d <<
1014 if (crypto_memneq(mic, mmie-> <<
1015 key->u.aes_cmac.icver <<
1016 return RX_DROP_U_MIC_ <<
1017 } 672 }
1018 } 673 }
1019 674
1020 memcpy(key->u.aes_cmac.rx_pn, ipn, 6) 675 memcpy(key->u.aes_cmac.rx_pn, ipn, 6);
1021 676
1022 /* Remove MMIE */ 677 /* Remove MMIE */
1023 skb_trim(skb, skb->len - sizeof(*mmie 678 skb_trim(skb, skb->len - sizeof(*mmie));
1024 679
1025 return RX_CONTINUE; 680 return RX_CONTINUE;
1026 } 681 }
1027 682
1028 ieee80211_tx_result 683 ieee80211_tx_result
1029 ieee80211_crypto_aes_gmac_encrypt(struct ieee !! 684 ieee80211_crypto_hw_encrypt(struct ieee80211_tx_data *tx)
1030 { 685 {
1031 struct sk_buff *skb; 686 struct sk_buff *skb;
1032 struct ieee80211_tx_info *info; !! 687 struct ieee80211_tx_info *info = NULL;
1033 struct ieee80211_key *key = tx->key; <<
1034 struct ieee80211_mmie_16 *mmie; <<
1035 struct ieee80211_hdr *hdr; <<
1036 u8 aad[GMAC_AAD_LEN]; <<
1037 u64 pn64; <<
1038 u8 nonce[GMAC_NONCE_LEN]; <<
1039 <<
1040 if (WARN_ON(skb_queue_len(&tx->skbs) <<
1041 return TX_DROP; <<
1042 <<
1043 skb = skb_peek(&tx->skbs); <<
1044 <<
1045 info = IEEE80211_SKB_CB(skb); <<
1046 <<
1047 if (info->control.hw_key && <<
1048 !(key->conf.flags & IEEE80211_KEY <<
1049 return TX_CONTINUE; <<
1050 <<
1051 if (WARN_ON(skb_tailroom(skb) < sizeo <<
1052 return TX_DROP; <<
1053 <<
1054 mmie = skb_put(skb, sizeof(*mmie)); <<
1055 mmie->element_id = WLAN_EID_MMIE; <<
1056 mmie->length = sizeof(*mmie) - 2; <<
1057 mmie->key_id = cpu_to_le16(key->conf. <<
1058 <<
1059 /* PN = PN + 1 */ <<
1060 pn64 = atomic64_inc_return(&key->conf <<
1061 <<
1062 bip_ipn_set64(mmie->sequence_number, <<
1063 <<
1064 if (info->control.hw_key) <<
1065 return TX_CONTINUE; <<
1066 <<
1067 bip_aad(skb, aad); <<
1068 <<
1069 hdr = (struct ieee80211_hdr *)skb->da <<
1070 memcpy(nonce, hdr->addr2, ETH_ALEN); <<
1071 bip_ipn_swap(nonce + ETH_ALEN, mmie-> <<
1072 688
1073 /* MIC = AES-GMAC(IGTK, AAD || Manage !! 689 skb_queue_walk(&tx->skbs, skb) {
1074 if (ieee80211_aes_gmac(key->u.aes_gma !! 690 info = IEEE80211_SKB_CB(skb);
1075 skb->data + 24 <<
1076 return TX_DROP; <<
1077 <<
1078 return TX_CONTINUE; <<
1079 } <<
1080 <<
1081 ieee80211_rx_result <<
1082 ieee80211_crypto_aes_gmac_decrypt(struct ieee <<
1083 { <<
1084 struct sk_buff *skb = rx->skb; <<
1085 struct ieee80211_rx_status *status = <<
1086 struct ieee80211_key *key = rx->key; <<
1087 struct ieee80211_mmie_16 *mmie; <<
1088 u8 aad[GMAC_AAD_LEN], *mic, ipn[6], n <<
1089 struct ieee80211_hdr *hdr = (struct i <<
1090 <<
1091 if (!ieee80211_is_mgmt(hdr->frame_con <<
1092 return RX_CONTINUE; <<
1093 <<
1094 /* management frames are already line <<
1095 <<
1096 if (skb->len < 24 + sizeof(*mmie)) <<
1097 return RX_DROP_U_SHORT_GMAC; <<
1098 <<
1099 mmie = (struct ieee80211_mmie_16 *) <<
1100 (skb->data + skb->len - sizeo <<
1101 if (mmie->element_id != WLAN_EID_MMIE <<
1102 mmie->length != sizeof(*mmie) - 2 <<
1103 return RX_DROP_U_BAD_MMIE; /* <<
1104 <<
1105 bip_ipn_swap(ipn, mmie->sequence_numb <<
1106 <<
1107 if (memcmp(ipn, key->u.aes_gmac.rx_pn <<
1108 key->u.aes_gmac.replays++; <<
1109 return RX_DROP_U_REPLAY; <<
1110 } <<
1111 <<
1112 if (!(status->flag & RX_FLAG_DECRYPTE <<
1113 /* hardware didn't decrypt/ve <<
1114 bip_aad(skb, aad); <<
1115 <<
1116 memcpy(nonce, hdr->addr2, ETH <<
1117 memcpy(nonce + ETH_ALEN, ipn, <<
1118 691
1119 mic = kmalloc(GMAC_MIC_LEN, G !! 692 /* handle hw-only algorithm */
1120 if (!mic) !! 693 if (!info->control.hw_key)
1121 return RX_DROP_U_OOM; !! 694 return TX_DROP;
1122 if (ieee80211_aes_gmac(key->u <<
1123 skb->d <<
1124 mic) < <<
1125 crypto_memneq(mic, mmie-> <<
1126 key->u.aes_gmac.icver <<
1127 kfree(mic); <<
1128 return RX_DROP_U_MIC_ <<
1129 } <<
1130 kfree(mic); <<
1131 } 695 }
1132 696
1133 memcpy(key->u.aes_gmac.rx_pn, ipn, 6) !! 697 ieee80211_tx_set_protected(tx);
1134 <<
1135 /* Remove MMIE */ <<
1136 skb_trim(skb, skb->len - sizeof(*mmie <<
1137 698
1138 return RX_CONTINUE; !! 699 return TX_CONTINUE;
1139 } 700 }
1140 701
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