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>
>> 12 #include <linux/slab.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 <asm/unaligned.h>
15 #include <linux/unaligned.h> <<
16 #include <net/mac80211.h> 17 #include <net/mac80211.h>
17 #include <crypto/aes.h> <<
18 #include <crypto/utils.h> <<
19 18
20 #include "ieee80211_i.h" 19 #include "ieee80211_i.h"
21 #include "michael.h" 20 #include "michael.h"
22 #include "tkip.h" 21 #include "tkip.h"
23 #include "aes_ccm.h" 22 #include "aes_ccm.h"
24 #include "aes_cmac.h" 23 #include "aes_cmac.h"
25 #include "aes_gmac.h" <<
26 #include "aes_gcm.h" <<
27 #include "wpa.h" 24 #include "wpa.h"
28 25
29 ieee80211_tx_result 26 ieee80211_tx_result
30 ieee80211_tx_h_michael_mic_add(struct ieee8021 27 ieee80211_tx_h_michael_mic_add(struct ieee80211_tx_data *tx)
31 { 28 {
32 u8 *data, *key, *mic; !! 29 u8 *data, *key, *mic, key_offset;
33 size_t data_len; 30 size_t data_len;
34 unsigned int hdrlen; 31 unsigned int hdrlen;
35 struct ieee80211_hdr *hdr; 32 struct ieee80211_hdr *hdr;
36 struct sk_buff *skb = tx->skb; 33 struct sk_buff *skb = tx->skb;
37 struct ieee80211_tx_info *info = IEEE8 !! 34 int authenticator;
>> 35 int wpa_test = 0;
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.alg != ALG_TKIP || skb->len < 24 ||
42 skb->len < 24 || !ieee80211_is_dat !! 40 !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 ((tx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE) &&
53 /* Need to use software crypto !! 51 !(tx->flags & IEEE80211_TX_FRAGMENTED) &&
54 info->control.hw_key = NULL; !! 52 !(tx->key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_MMIC) &&
55 } !! 53 !wpa_test) {
56 !! 54 /* hwaccel - with no need for preallocated room for MMIC */
57 if (info->control.hw_key && <<
58 (info->flags & IEEE80211_TX_CTL_DO <<
59 ieee80211_hw_check(&tx->local->hw <<
60 !(tx->key->conf.flags & (IEEE80211 <<
61 IEEE80211 <<
62 /* hwaccel - with no need for <<
63 return TX_CONTINUE; 55 return TX_CONTINUE;
64 } 56 }
65 57
66 tail = MICHAEL_MIC_LEN; 58 tail = MICHAEL_MIC_LEN;
67 if (!info->control.hw_key) !! 59 if (!(tx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
68 tail += IEEE80211_TKIP_ICV_LEN !! 60 tail += TKIP_ICV_LEN;
69 61
70 if (WARN(skb_tailroom(skb) < tail || !! 62 if (WARN_ON(skb_tailroom(skb) < tail ||
71 skb_headroom(skb) < IEEE80211 !! 63 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; 64 return TX_DROP;
76 65
>> 66 #if 0
>> 67 authenticator = fc & IEEE80211_FCTL_FROMDS; /* FIX */
>> 68 #else
>> 69 authenticator = 1;
>> 70 #endif
>> 71 key_offset = authenticator ?
>> 72 NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY :
>> 73 NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY;
>> 74 key = &tx->key->conf.key[key_offset];
77 mic = skb_put(skb, MICHAEL_MIC_LEN); 75 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_ <<
86 michael_mic(key, hdr, data, data_len, 76 michael_mic(key, hdr, data, data_len, mic);
87 if (unlikely(info->flags & IEEE80211_T <<
88 mic[0]++; <<
89 77
90 return TX_CONTINUE; 78 return TX_CONTINUE;
91 } 79 }
92 80
93 81
94 ieee80211_rx_result 82 ieee80211_rx_result
95 ieee80211_rx_h_michael_mic_verify(struct ieee8 83 ieee80211_rx_h_michael_mic_verify(struct ieee80211_rx_data *rx)
96 { 84 {
97 u8 *data, *key = NULL; !! 85 u8 *data, *key = NULL, key_offset;
98 size_t data_len; 86 size_t data_len;
99 unsigned int hdrlen; 87 unsigned int hdrlen;
>> 88 struct ieee80211_hdr *hdr;
100 u8 mic[MICHAEL_MIC_LEN]; 89 u8 mic[MICHAEL_MIC_LEN];
101 struct sk_buff *skb = rx->skb; 90 struct sk_buff *skb = rx->skb;
102 struct ieee80211_rx_status *status = I !! 91 int authenticator = 1, wpa_test = 0;
103 struct ieee80211_hdr *hdr = (struct ie <<
104 <<
105 /* <<
106 * it makes no sense to check for MIC <<
107 * than data frames. <<
108 */ <<
109 if (!ieee80211_is_data_present(hdr->fr <<
110 return RX_CONTINUE; <<
111 <<
112 /* <<
113 * No way to verify the MIC if the har <<
114 * the IV with the key index. In this <<
115 * on the driver to set RX_FLAG_MMIC_E <<
116 * MIC failure report. <<
117 */ <<
118 if (status->flag & (RX_FLAG_MMIC_STRIP <<
119 if (status->flag & RX_FLAG_MMI <<
120 goto mic_fail_no_key; <<
121 <<
122 if (!(status->flag & RX_FLAG_I <<
123 rx->key->conf.cipher == WL <<
124 goto update_iv; <<
125 92
>> 93 /* No way to verify the MIC if the hardware stripped it */
>> 94 if (rx->status->flag & RX_FLAG_MMIC_STRIPPED)
126 return RX_CONTINUE; 95 return RX_CONTINUE;
127 } <<
128 96
129 /* !! 97 hdr = (struct ieee80211_hdr *)skb->data;
130 * Some hardware seems to generate Mic !! 98 if (!rx->key || rx->key->conf.alg != ALG_TKIP ||
131 * though, the frame was not encrypted !! 99 !ieee80211_has_protected(hdr->frame_control) ||
132 * MIC. Ignore the flag them to avoid !! 100 !ieee80211_is_data_present(hdr->frame_control))
133 */ <<
134 if (!rx->key || rx->key->conf.cipher ! <<
135 !(status->flag & RX_FLAG_DECRYPTED <<
136 return RX_CONTINUE; 101 return RX_CONTINUE;
137 102
138 if (rx->sdata->vif.type == NL80211_IFT <<
139 /* <<
140 * APs with pairwise keys shou <<
141 * errors for non-zero keyidx <<
142 * group keys and only the AP <<
143 * frames in the BSS. <<
144 */ <<
145 return RX_DROP_U_AP_RX_GROUPCA <<
146 } <<
147 <<
148 if (status->flag & RX_FLAG_MMIC_ERROR) <<
149 goto mic_fail; <<
150 <<
151 hdrlen = ieee80211_hdrlen(hdr->frame_c 103 hdrlen = ieee80211_hdrlen(hdr->frame_control);
152 if (skb->len < hdrlen + MICHAEL_MIC_LE 104 if (skb->len < hdrlen + MICHAEL_MIC_LEN)
153 return RX_DROP_U_SHORT_MMIC; !! 105 return RX_DROP_UNUSABLE;
154 <<
155 if (skb_linearize(rx->skb)) <<
156 return RX_DROP_U_OOM; <<
157 hdr = (void *)skb->data; <<
158 106
159 data = skb->data + hdrlen; 107 data = skb->data + hdrlen;
160 data_len = skb->len - hdrlen - MICHAEL 108 data_len = skb->len - hdrlen - MICHAEL_MIC_LEN;
161 key = &rx->key->conf.key[NL80211_TKIP_ !! 109
>> 110 #if 0
>> 111 authenticator = fc & IEEE80211_FCTL_TODS; /* FIX */
>> 112 #else
>> 113 authenticator = 1;
>> 114 #endif
>> 115 key_offset = authenticator ?
>> 116 NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY :
>> 117 NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY;
>> 118 key = &rx->key->conf.key[key_offset];
162 michael_mic(key, hdr, data, data_len, 119 michael_mic(key, hdr, data, data_len, mic);
163 if (crypto_memneq(mic, data + data_len !! 120 if (memcmp(mic, data + data_len, MICHAEL_MIC_LEN) != 0 || wpa_test) {
164 goto mic_fail; !! 121 if (!(rx->flags & IEEE80211_RX_RA_MATCH))
>> 122 return RX_DROP_UNUSABLE;
>> 123
>> 124 mac80211_ev_michael_mic_failure(rx->sdata, rx->key->conf.keyidx,
>> 125 (void *) skb->data, NULL,
>> 126 GFP_ATOMIC);
>> 127 return RX_DROP_UNUSABLE;
>> 128 }
165 129
166 /* remove Michael MIC from payload */ 130 /* remove Michael MIC from payload */
167 skb_trim(skb, skb->len - MICHAEL_MIC_L 131 skb_trim(skb, skb->len - MICHAEL_MIC_LEN);
168 132
169 update_iv: <<
170 /* update IV in key information to be 133 /* update IV in key information to be able to detect replays */
171 rx->key->u.tkip.rx[rx->security_idx].i !! 134 rx->key->u.tkip.rx[rx->queue].iv32 = rx->tkip_iv32;
172 rx->key->u.tkip.rx[rx->security_idx].i !! 135 rx->key->u.tkip.rx[rx->queue].iv16 = rx->tkip_iv16;
173 136
174 return RX_CONTINUE; 137 return RX_CONTINUE;
175 <<
176 mic_fail: <<
177 rx->key->u.tkip.mic_failures++; <<
178 <<
179 mic_fail_no_key: <<
180 /* <<
181 * In some cases the key can be unset <<
182 * a driver that supports HW encryptio <<
183 * the key is set. <<
184 */ <<
185 cfg80211_michael_mic_failure(rx->sdata <<
186 is_multic <<
187 NL80211_K <<
188 NL80211_K <<
189 rx->key ? <<
190 NULL, GFP <<
191 return RX_DROP_U_MMIC_FAIL; <<
192 } 138 }
193 139
>> 140
194 static int tkip_encrypt_skb(struct ieee80211_t 141 static int tkip_encrypt_skb(struct ieee80211_tx_data *tx, struct sk_buff *skb)
195 { 142 {
196 struct ieee80211_hdr *hdr = (struct ie 143 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
197 struct ieee80211_key *key = tx->key; 144 struct ieee80211_key *key = tx->key;
198 struct ieee80211_tx_info *info = IEEE8 145 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
199 unsigned int hdrlen; 146 unsigned int hdrlen;
200 int len, tail; 147 int len, tail;
201 u64 pn; <<
202 u8 *pos; 148 u8 *pos;
203 149
204 if (info->control.hw_key && !! 150 if ((tx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE) &&
205 !(info->control.hw_key->flags & IE !! 151 !(tx->key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV)) {
206 !(info->control.hw_key->flags & IE !! 152 /* hwaccel - with no need for preallocated room for IV/ICV */
207 /* hwaccel - with no need for !! 153 info->control.hw_key = &tx->key->conf;
208 return 0; 154 return 0;
209 } 155 }
210 156
211 hdrlen = ieee80211_hdrlen(hdr->frame_c 157 hdrlen = ieee80211_hdrlen(hdr->frame_control);
212 len = skb->len - hdrlen; 158 len = skb->len - hdrlen;
213 159
214 if (info->control.hw_key) !! 160 if (tx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE)
215 tail = 0; 161 tail = 0;
216 else 162 else
217 tail = IEEE80211_TKIP_ICV_LEN; !! 163 tail = TKIP_ICV_LEN;
218 164
219 if (WARN_ON(skb_tailroom(skb) < tail | 165 if (WARN_ON(skb_tailroom(skb) < tail ||
220 skb_headroom(skb) < IEEE80 !! 166 skb_headroom(skb) < TKIP_IV_LEN))
221 return -1; 167 return -1;
222 168
223 pos = skb_push(skb, IEEE80211_TKIP_IV_ !! 169 pos = skb_push(skb, TKIP_IV_LEN);
224 memmove(pos, pos + IEEE80211_TKIP_IV_L !! 170 memmove(pos, pos + TKIP_IV_LEN, hdrlen);
225 pos += hdrlen; 171 pos += hdrlen;
226 172
227 /* the HW only needs room for the IV, <<
228 if (info->control.hw_key && <<
229 (info->control.hw_key->flags & IEE <<
230 return 0; <<
231 <<
232 /* Increase IV for the frame */ 173 /* Increase IV for the frame */
233 pn = atomic64_inc_return(&key->conf.tx !! 174 key->u.tkip.tx.iv16++;
234 pos = ieee80211_tkip_add_iv(pos, &key- !! 175 if (key->u.tkip.tx.iv16 == 0)
>> 176 key->u.tkip.tx.iv32++;
>> 177
>> 178 if (tx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE) {
>> 179 /* hwaccel - with preallocated room for IV */
>> 180 ieee80211_tkip_add_iv(pos, key, key->u.tkip.tx.iv16);
235 181
236 /* hwaccel - with software IV */ !! 182 info->control.hw_key = &tx->key->conf;
237 if (info->control.hw_key) <<
238 return 0; 183 return 0;
>> 184 }
239 185
240 /* Add room for ICV */ 186 /* Add room for ICV */
241 skb_put(skb, IEEE80211_TKIP_ICV_LEN); !! 187 skb_put(skb, TKIP_ICV_LEN);
242 188
243 return ieee80211_tkip_encrypt_data(&tx !! 189 hdr = (struct ieee80211_hdr *) skb->data;
244 key !! 190 ieee80211_tkip_encrypt_data(tx->local->wep_tx_tfm,
>> 191 key, pos, len, hdr->addr2);
>> 192 return 0;
245 } 193 }
246 194
247 195
248 ieee80211_tx_result 196 ieee80211_tx_result
249 ieee80211_crypto_tkip_encrypt(struct ieee80211 197 ieee80211_crypto_tkip_encrypt(struct ieee80211_tx_data *tx)
250 { 198 {
251 struct sk_buff *skb; !! 199 struct sk_buff *skb = tx->skb;
252 200
253 ieee80211_tx_set_protected(tx); 201 ieee80211_tx_set_protected(tx);
254 202
255 skb_queue_walk(&tx->skbs, skb) { !! 203 do {
256 if (tkip_encrypt_skb(tx, skb) 204 if (tkip_encrypt_skb(tx, skb) < 0)
257 return TX_DROP; 205 return TX_DROP;
258 } !! 206 } while ((skb = skb->next));
259 207
260 return TX_CONTINUE; 208 return TX_CONTINUE;
261 } 209 }
262 210
263 211
264 ieee80211_rx_result 212 ieee80211_rx_result
265 ieee80211_crypto_tkip_decrypt(struct ieee80211 213 ieee80211_crypto_tkip_decrypt(struct ieee80211_rx_data *rx)
266 { 214 {
267 struct ieee80211_hdr *hdr = (struct ie 215 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) rx->skb->data;
268 int hdrlen, res, hwaccel = 0; !! 216 int hdrlen, res, hwaccel = 0, wpa_test = 0;
269 struct ieee80211_key *key = rx->key; 217 struct ieee80211_key *key = rx->key;
270 struct sk_buff *skb = rx->skb; 218 struct sk_buff *skb = rx->skb;
271 struct ieee80211_rx_status *status = I <<
272 219
273 hdrlen = ieee80211_hdrlen(hdr->frame_c 220 hdrlen = ieee80211_hdrlen(hdr->frame_control);
274 221
275 if (!ieee80211_is_data(hdr->frame_cont 222 if (!ieee80211_is_data(hdr->frame_control))
276 return RX_CONTINUE; 223 return RX_CONTINUE;
277 224
278 if (!rx->sta || skb->len - hdrlen < 12 225 if (!rx->sta || skb->len - hdrlen < 12)
279 return RX_DROP_U_SHORT_TKIP; !! 226 return RX_DROP_UNUSABLE;
280 227
281 /* it may be possible to optimize this !! 228 if (rx->status->flag & RX_FLAG_DECRYPTED) {
282 if (skb_linearize(rx->skb)) !! 229 if (rx->status->flag & RX_FLAG_IV_STRIPPED) {
283 return RX_DROP_U_OOM; !! 230 /*
284 hdr = (void *)skb->data; !! 231 * Hardware took care of all processing, including
>> 232 * replay protection, and stripped the ICV/IV so
>> 233 * we cannot do any checks here.
>> 234 */
>> 235 return RX_CONTINUE;
>> 236 }
285 237
286 /* !! 238 /* let TKIP code verify IV, but skip decryption */
287 * Let TKIP code verify IV, but skip d <<
288 * In the case where hardware checks t <<
289 * we don't even get here, see ieee802 <<
290 */ <<
291 if (status->flag & RX_FLAG_DECRYPTED) <<
292 hwaccel = 1; 239 hwaccel = 1;
>> 240 }
293 241
294 res = ieee80211_tkip_decrypt_data(&rx- !! 242 res = ieee80211_tkip_decrypt_data(rx->local->wep_rx_tfm,
295 key, 243 key, skb->data + hdrlen,
296 skb- 244 skb->len - hdrlen, rx->sta->sta.addr,
297 hdr- !! 245 hdr->addr1, hwaccel, rx->queue,
298 &rx- !! 246 &rx->tkip_iv32,
299 &rx- !! 247 &rx->tkip_iv16);
300 if (res != TKIP_DECRYPT_OK) !! 248 if (res != TKIP_DECRYPT_OK || wpa_test)
301 return RX_DROP_U_TKIP_FAIL; !! 249 return RX_DROP_UNUSABLE;
302 250
303 /* Trim ICV */ 251 /* Trim ICV */
304 if (!(status->flag & RX_FLAG_ICV_STRIP !! 252 skb_trim(skb, skb->len - TKIP_ICV_LEN);
305 skb_trim(skb, skb->len - IEEE8 <<
306 253
307 /* Remove IV */ 254 /* Remove IV */
308 memmove(skb->data + IEEE80211_TKIP_IV_ !! 255 memmove(skb->data + TKIP_IV_LEN, skb->data, hdrlen);
309 skb_pull(skb, IEEE80211_TKIP_IV_LEN); !! 256 skb_pull(skb, TKIP_IV_LEN);
310 257
311 return RX_CONTINUE; 258 return RX_CONTINUE;
312 } 259 }
313 260
314 /* !! 261
315 * Calculate AAD for CCMP/GCMP, returning qos_ !! 262 static void ccmp_special_blocks(struct sk_buff *skb, u8 *pn, u8 *scratch,
316 * need that in CCMP also for b_0. !! 263 int encrypted)
317 */ <<
318 static u8 ccmp_gcmp_aad(struct sk_buff *skb, u <<
319 { 264 {
320 struct ieee80211_hdr *hdr = (void *)sk <<
321 __le16 mask_fc; 265 __le16 mask_fc;
322 int a4_included, mgmt; 266 int a4_included, mgmt;
323 u8 qos_tid; 267 u8 qos_tid;
324 u16 len_a = 22; !! 268 u8 *b_0, *aad;
>> 269 u16 data_len, len_a;
>> 270 unsigned int hdrlen;
>> 271 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
>> 272
>> 273 b_0 = scratch + 3 * AES_BLOCK_LEN;
>> 274 aad = scratch + 4 * AES_BLOCK_LEN;
325 275
326 /* 276 /*
327 * Mask FC: zero subtype b4 b5 b6 (if 277 * Mask FC: zero subtype b4 b5 b6 (if not mgmt)
328 * Retry, PwrMgt, MoreData, Order (if !! 278 * Retry, PwrMgt, MoreData; set Protected
329 */ 279 */
330 mgmt = ieee80211_is_mgmt(hdr->frame_co 280 mgmt = ieee80211_is_mgmt(hdr->frame_control);
331 mask_fc = hdr->frame_control; 281 mask_fc = hdr->frame_control;
332 mask_fc &= ~cpu_to_le16(IEEE80211_FCTL 282 mask_fc &= ~cpu_to_le16(IEEE80211_FCTL_RETRY |
333 IEEE80211_FCTL 283 IEEE80211_FCTL_PM | IEEE80211_FCTL_MOREDATA);
334 if (!mgmt) 284 if (!mgmt)
335 mask_fc &= ~cpu_to_le16(0x0070 285 mask_fc &= ~cpu_to_le16(0x0070);
336 mask_fc |= cpu_to_le16(IEEE80211_FCTL_ 286 mask_fc |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
337 287
>> 288 hdrlen = ieee80211_hdrlen(hdr->frame_control);
>> 289 len_a = hdrlen - 2;
338 a4_included = ieee80211_has_a4(hdr->fr 290 a4_included = ieee80211_has_a4(hdr->frame_control);
339 if (a4_included) <<
340 len_a += 6; <<
341 291
342 if (ieee80211_is_data_qos(hdr->frame_c !! 292 if (ieee80211_is_data_qos(hdr->frame_control))
343 qos_tid = *ieee80211_get_qos_c !! 293 qos_tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK;
>> 294 else
>> 295 qos_tid = 0;
344 296
345 if (spp_amsdu) !! 297 data_len = skb->len - hdrlen - CCMP_HDR_LEN;
346 qos_tid &= IEEE80211_Q !! 298 if (encrypted)
347 IEEE80211_Q !! 299 data_len -= CCMP_MIC_LEN;
348 else <<
349 qos_tid &= IEEE80211_Q <<
350 300
351 mask_fc &= ~cpu_to_le16(IEEE80 !! 301 /* First block, b_0 */
352 len_a += 2; !! 302 b_0[0] = 0x59; /* flags: Adata: 1, M: 011, L: 001 */
353 } else { !! 303 /* Nonce: Nonce Flags | A2 | PN
354 qos_tid = 0; !! 304 * Nonce Flags: Priority (b0..b3) | Management (b4) | Reserved (b5..b7)
355 } !! 305 */
>> 306 b_0[1] = qos_tid | (mgmt << 4);
>> 307 memcpy(&b_0[2], hdr->addr2, ETH_ALEN);
>> 308 memcpy(&b_0[8], pn, CCMP_PN_LEN);
>> 309 /* l(m) */
>> 310 put_unaligned_be16(data_len, &b_0[14]);
356 311
357 /* AAD (extra authenticate-only data) 312 /* AAD (extra authenticate-only data) / masked 802.11 header
358 * FC | A1 | A2 | A3 | SC | [A4] | [QC 313 * FC | A1 | A2 | A3 | SC | [A4] | [QC] */
359 put_unaligned_be16(len_a, &aad[0]); 314 put_unaligned_be16(len_a, &aad[0]);
360 put_unaligned(mask_fc, (__le16 *)&aad[ 315 put_unaligned(mask_fc, (__le16 *)&aad[2]);
361 memcpy(&aad[4], &hdr->addrs, 3 * ETH_A !! 316 memcpy(&aad[4], &hdr->addr1, 3 * ETH_ALEN);
362 317
363 /* Mask Seq#, leave Frag# */ 318 /* Mask Seq#, leave Frag# */
364 aad[22] = *((u8 *) &hdr->seq_ctrl) & 0 319 aad[22] = *((u8 *) &hdr->seq_ctrl) & 0x0f;
365 aad[23] = 0; 320 aad[23] = 0;
366 321
367 if (a4_included) { 322 if (a4_included) {
368 memcpy(&aad[24], hdr->addr4, E 323 memcpy(&aad[24], hdr->addr4, ETH_ALEN);
369 aad[30] = qos_tid; 324 aad[30] = qos_tid;
370 aad[31] = 0; 325 aad[31] = 0;
371 } else { 326 } else {
372 memset(&aad[24], 0, ETH_ALEN + 327 memset(&aad[24], 0, ETH_ALEN + IEEE80211_QOS_CTL_LEN);
373 aad[24] = qos_tid; 328 aad[24] = qos_tid;
374 } 329 }
375 <<
376 return qos_tid; <<
377 } 330 }
378 331
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 } <<
401 332
402 static inline void ccmp_pn2hdr(u8 *hdr, u8 *pn 333 static inline void ccmp_pn2hdr(u8 *hdr, u8 *pn, int key_id)
403 { 334 {
404 hdr[0] = pn[5]; 335 hdr[0] = pn[5];
405 hdr[1] = pn[4]; 336 hdr[1] = pn[4];
406 hdr[2] = 0; 337 hdr[2] = 0;
407 hdr[3] = 0x20 | (key_id << 6); 338 hdr[3] = 0x20 | (key_id << 6);
408 hdr[4] = pn[3]; 339 hdr[4] = pn[3];
409 hdr[5] = pn[2]; 340 hdr[5] = pn[2];
410 hdr[6] = pn[1]; 341 hdr[6] = pn[1];
411 hdr[7] = pn[0]; 342 hdr[7] = pn[0];
412 } 343 }
413 344
414 345
415 static inline void ccmp_hdr2pn(u8 *pn, u8 *hdr 346 static inline void ccmp_hdr2pn(u8 *pn, u8 *hdr)
416 { 347 {
417 pn[0] = hdr[7]; 348 pn[0] = hdr[7];
418 pn[1] = hdr[6]; 349 pn[1] = hdr[6];
419 pn[2] = hdr[5]; 350 pn[2] = hdr[5];
420 pn[3] = hdr[4]; 351 pn[3] = hdr[4];
421 pn[4] = hdr[1]; 352 pn[4] = hdr[1];
422 pn[5] = hdr[0]; 353 pn[5] = hdr[0];
423 } 354 }
424 355
425 356
426 static int ccmp_encrypt_skb(struct ieee80211_t !! 357 static int ccmp_encrypt_skb(struct ieee80211_tx_data *tx, struct sk_buff *skb)
427 unsigned int mic_l <<
428 { 358 {
429 struct ieee80211_hdr *hdr = (struct ie 359 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
430 struct ieee80211_key *key = tx->key; 360 struct ieee80211_key *key = tx->key;
431 struct ieee80211_tx_info *info = IEEE8 361 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
432 int hdrlen, len, tail; 362 int hdrlen, len, tail;
433 u8 *pos; !! 363 u8 *pos, *pn;
434 u8 pn[6]; !! 364 int i;
435 u64 pn64; !! 365 bool skip_hw;
436 u8 aad[CCM_AAD_LEN]; !! 366
437 u8 b_0[AES_BLOCK_SIZE]; !! 367 skip_hw = (tx->key->conf.flags & IEEE80211_KEY_FLAG_SW_MGMT) &&
438 !! 368 ieee80211_is_mgmt(hdr->frame_control);
439 if (info->control.hw_key && !! 369
440 !(info->control.hw_key->flags & IE !! 370 if ((tx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE) &&
441 !(info->control.hw_key->flags & IE !! 371 !(tx->key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV) &&
442 !((info->control.hw_key->flags & !! 372 !skip_hw) {
443 IEEE80211_KEY_FLAG_GENERATE_IV_ !! 373 /* hwaccel - with no need for preallocated room for CCMP
444 ieee80211_is_mgmt(hdr->frame_con !! 374 * header or MIC fields */
445 /* !! 375 info->control.hw_key = &tx->key->conf;
446 * hwaccel has no need for pre <<
447 * header or MIC fields <<
448 */ <<
449 return 0; 376 return 0;
450 } 377 }
451 378
452 hdrlen = ieee80211_hdrlen(hdr->frame_c 379 hdrlen = ieee80211_hdrlen(hdr->frame_control);
453 len = skb->len - hdrlen; 380 len = skb->len - hdrlen;
454 381
455 if (info->control.hw_key) !! 382 if (key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE)
456 tail = 0; 383 tail = 0;
457 else 384 else
458 tail = mic_len; !! 385 tail = CCMP_MIC_LEN;
459 386
460 if (WARN_ON(skb_tailroom(skb) < tail | 387 if (WARN_ON(skb_tailroom(skb) < tail ||
461 skb_headroom(skb) < IEEE80 !! 388 skb_headroom(skb) < CCMP_HDR_LEN))
462 return -1; 389 return -1;
463 390
464 pos = skb_push(skb, IEEE80211_CCMP_HDR !! 391 pos = skb_push(skb, CCMP_HDR_LEN);
465 memmove(pos, pos + IEEE80211_CCMP_HDR_ !! 392 memmove(pos, pos + CCMP_HDR_LEN, hdrlen);
466 !! 393 hdr = (struct ieee80211_hdr *) pos;
467 /* the HW only needs room for the IV, <<
468 if (info->control.hw_key && <<
469 (info->control.hw_key->flags & IEE <<
470 return 0; <<
471 <<
472 pos += hdrlen; 394 pos += hdrlen;
473 395
474 pn64 = atomic64_inc_return(&key->conf. !! 396 /* PN = PN + 1 */
>> 397 pn = key->u.ccmp.tx_pn;
475 398
476 pn[5] = pn64; !! 399 for (i = CCMP_PN_LEN - 1; i >= 0; i--) {
477 pn[4] = pn64 >> 8; !! 400 pn[i]++;
478 pn[3] = pn64 >> 16; !! 401 if (pn[i])
479 pn[2] = pn64 >> 24; !! 402 break;
480 pn[1] = pn64 >> 32; !! 403 }
481 pn[0] = pn64 >> 40; <<
482 404
483 ccmp_pn2hdr(pos, pn, key->conf.keyidx) 405 ccmp_pn2hdr(pos, pn, key->conf.keyidx);
484 406
485 /* hwaccel - with software CCMP header !! 407 if ((key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE) && !skip_hw) {
486 if (info->control.hw_key) !! 408 /* hwaccel - with preallocated room for CCMP header */
>> 409 info->control.hw_key = &tx->key->conf;
487 return 0; 410 return 0;
>> 411 }
>> 412
>> 413 pos += CCMP_HDR_LEN;
>> 414 ccmp_special_blocks(skb, pn, key->u.ccmp.tx_crypto_buf, 0);
>> 415 ieee80211_aes_ccm_encrypt(key->u.ccmp.tfm, key->u.ccmp.tx_crypto_buf, pos, len,
>> 416 pos, skb_put(skb, CCMP_MIC_LEN));
488 417
489 pos += IEEE80211_CCMP_HDR_LEN; !! 418 return 0;
490 ccmp_special_blocks(skb, pn, b_0, aad, <<
491 key->conf.flags & <<
492 return ieee80211_aes_ccm_encrypt(key-> <<
493 skb_p <<
494 } 419 }
495 420
496 421
497 ieee80211_tx_result 422 ieee80211_tx_result
498 ieee80211_crypto_ccmp_encrypt(struct ieee80211 !! 423 ieee80211_crypto_ccmp_encrypt(struct ieee80211_tx_data *tx)
499 unsigned int mic <<
500 { 424 {
501 struct sk_buff *skb; !! 425 struct sk_buff *skb = tx->skb;
502 426
503 ieee80211_tx_set_protected(tx); 427 ieee80211_tx_set_protected(tx);
504 428
505 skb_queue_walk(&tx->skbs, skb) { !! 429 do {
506 if (ccmp_encrypt_skb(tx, skb, !! 430 if (ccmp_encrypt_skb(tx, skb) < 0)
507 return TX_DROP; 431 return TX_DROP;
508 } !! 432 } while ((skb = skb->next));
509 433
510 return TX_CONTINUE; 434 return TX_CONTINUE;
511 } 435 }
512 436
513 437
514 ieee80211_rx_result 438 ieee80211_rx_result
515 ieee80211_crypto_ccmp_decrypt(struct ieee80211 !! 439 ieee80211_crypto_ccmp_decrypt(struct ieee80211_rx_data *rx)
516 unsigned int mic <<
517 { 440 {
518 struct ieee80211_hdr *hdr = (struct ie 441 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data;
519 int hdrlen; 442 int hdrlen;
520 struct ieee80211_key *key = rx->key; 443 struct ieee80211_key *key = rx->key;
521 struct sk_buff *skb = rx->skb; 444 struct sk_buff *skb = rx->skb;
522 struct ieee80211_rx_status *status = I !! 445 u8 pn[CCMP_PN_LEN];
523 u8 pn[IEEE80211_CCMP_PN_LEN]; <<
524 int data_len; 446 int data_len;
525 int queue; <<
526 447
527 hdrlen = ieee80211_hdrlen(hdr->frame_c 448 hdrlen = ieee80211_hdrlen(hdr->frame_control);
528 449
529 if (!ieee80211_is_data(hdr->frame_cont 450 if (!ieee80211_is_data(hdr->frame_control) &&
530 !ieee80211_is_robust_mgmt_frame(sk !! 451 !ieee80211_is_robust_mgmt_frame(hdr))
531 return RX_CONTINUE; 452 return RX_CONTINUE;
532 453
533 if (status->flag & RX_FLAG_DECRYPTED) !! 454 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) 455 if (!rx->sta || data_len < 0)
548 return RX_DROP_U_SHORT_CCMP; !! 456 return RX_DROP_UNUSABLE;
549 <<
550 if (!(status->flag & RX_FLAG_PN_VALIDA <<
551 int res; <<
552 457
553 ccmp_hdr2pn(pn, skb->data + hd !! 458 if ((rx->status->flag & RX_FLAG_DECRYPTED) &&
554 !! 459 (rx->status->flag & RX_FLAG_IV_STRIPPED))
555 queue = rx->security_idx; !! 460 return RX_CONTINUE;
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; <<
704 461
705 ieee80211_tx_set_protected(tx); !! 462 ccmp_hdr2pn(pn, skb->data + hdrlen);
706 463
707 skb_queue_walk(&tx->skbs, skb) { !! 464 if (memcmp(pn, key->u.ccmp.rx_pn[rx->queue], CCMP_PN_LEN) <= 0) {
708 if (gcmp_encrypt_skb(tx, skb) !! 465 key->u.ccmp.replays++;
709 return TX_DROP; !! 466 return RX_DROP_UNUSABLE;
710 } 467 }
711 468
712 return TX_CONTINUE; !! 469 if (!(rx->status->flag & RX_FLAG_DECRYPTED)) {
713 } !! 470 /* hardware didn't decrypt/verify MIC */
714 !! 471 ccmp_special_blocks(skb, pn, key->u.ccmp.rx_crypto_buf, 1);
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; <<
731 472
732 if (status->flag & RX_FLAG_DECRYPTED) !! 473 if (ieee80211_aes_ccm_decrypt(
733 if (!pskb_may_pull(rx->skb, hd !! 474 key->u.ccmp.tfm, key->u.ccmp.rx_crypto_buf,
734 return RX_DROP_U_SHORT !! 475 skb->data + hdrlen + CCMP_HDR_LEN, data_len,
735 if (status->flag & RX_FLAG_MIC !! 476 skb->data + skb->len - CCMP_MIC_LEN,
736 mic_len = 0; !! 477 skb->data + hdrlen + CCMP_HDR_LEN))
737 } else { !! 478 return RX_DROP_UNUSABLE;
738 if (skb_linearize(rx->skb)) <<
739 return RX_DROP_U_OOM; <<
740 } 479 }
741 480
742 /* reload hdr - skb might have been re !! 481 memcpy(key->u.ccmp.rx_pn[rx->queue], pn, CCMP_PN_LEN);
743 hdr = (void *)rx->skb->data; <<
744 <<
745 data_len = skb->len - hdrlen - IEEE802 <<
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 <<
754 queue = rx->security_idx; <<
755 482
756 res = memcmp(pn, key->u.gcmp.r !! 483 /* Remove CCMP header and MIC */
757 IEEE80211_GCMP_PN !! 484 skb_trim(skb, skb->len - CCMP_MIC_LEN);
758 if (res < 0 || !! 485 memmove(skb->data + CCMP_HDR_LEN, skb->data, hdrlen);
759 (!res && !(status->flag & !! 486 skb_pull(skb, CCMP_HDR_LEN);
760 key->u.gcmp.replays++; <<
761 return RX_DROP_U_REPLA <<
762 } <<
763 <<
764 if (!(status->flag & RX_FLAG_D <<
765 u8 aad[2 * AES_BLOCK_S <<
766 u8 j_0[AES_BLOCK_SIZE] <<
767 /* hardware didn't dec <<
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 <<
780 memcpy(key->u.gcmp.rx_pn[queue <<
781 if (unlikely(ieee80211_is_frag <<
782 memcpy(rx->ccm_gcm.pn, <<
783 } <<
784 <<
785 /* Remove GCMP header and MIC */ <<
786 if (pskb_trim(skb, skb->len - mic_len) <<
787 return RX_DROP_U_SHORT_GCMP_MI <<
788 memmove(skb->data + IEEE80211_GCMP_HDR <<
789 skb_pull(skb, IEEE80211_GCMP_HDR_LEN); <<
790 487
791 return RX_CONTINUE; 488 return RX_CONTINUE;
792 } 489 }
793 490
>> 491
794 static void bip_aad(struct sk_buff *skb, u8 *a 492 static void bip_aad(struct sk_buff *skb, u8 *aad)
795 { 493 {
796 __le16 mask_fc; <<
797 struct ieee80211_hdr *hdr = (struct ie <<
798 <<
799 /* BIP AAD: FC(masked) || A1 || A2 || 494 /* BIP AAD: FC(masked) || A1 || A2 || A3 */
800 495
801 /* FC type/subtype */ 496 /* FC type/subtype */
>> 497 aad[0] = skb->data[0];
802 /* Mask FC Retry, PwrMgt, MoreData fla 498 /* Mask FC Retry, PwrMgt, MoreData flags to zero */
803 mask_fc = hdr->frame_control; !! 499 aad[1] = skb->data[1] & ~(BIT(4) | BIT(5) | BIT(6));
804 mask_fc &= ~cpu_to_le16(IEEE80211_FCTL <<
805 IEEE80211_FCTL <<
806 put_unaligned(mask_fc, (__le16 *) &aad <<
807 /* A1 || A2 || A3 */ 500 /* A1 || A2 || A3 */
808 memcpy(aad + 2, &hdr->addrs, 3 * ETH_A !! 501 memcpy(aad + 2, skb->data + 4, 3 * ETH_ALEN);
809 } 502 }
810 503
811 504
812 static inline void bip_ipn_set64(u8 *d, u64 pn <<
813 { <<
814 *d++ = pn; <<
815 *d++ = pn >> 8; <<
816 *d++ = pn >> 16; <<
817 *d++ = pn >> 24; <<
818 *d++ = pn >> 32; <<
819 *d = pn >> 40; <<
820 } <<
821 <<
822 static inline void bip_ipn_swap(u8 *d, const u 505 static inline void bip_ipn_swap(u8 *d, const u8 *s)
823 { 506 {
824 *d++ = s[5]; 507 *d++ = s[5];
825 *d++ = s[4]; 508 *d++ = s[4];
826 *d++ = s[3]; 509 *d++ = s[3];
827 *d++ = s[2]; 510 *d++ = s[2];
828 *d++ = s[1]; 511 *d++ = s[1];
829 *d = s[0]; 512 *d = s[0];
830 } 513 }
831 514
832 515
833 ieee80211_tx_result 516 ieee80211_tx_result
834 ieee80211_crypto_aes_cmac_encrypt(struct ieee8 517 ieee80211_crypto_aes_cmac_encrypt(struct ieee80211_tx_data *tx)
835 { 518 {
836 struct sk_buff *skb; !! 519 struct sk_buff *skb = tx->skb;
837 struct ieee80211_tx_info *info; !! 520 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
838 struct ieee80211_key *key = tx->key; 521 struct ieee80211_key *key = tx->key;
839 struct ieee80211_mmie *mmie; 522 struct ieee80211_mmie *mmie;
840 u8 aad[20]; !! 523 u8 *pn, aad[20];
841 u64 pn64; !! 524 int i;
842 <<
843 if (WARN_ON(skb_queue_len(&tx->skbs) ! <<
844 return TX_DROP; <<
845 <<
846 skb = skb_peek(&tx->skbs); <<
847 <<
848 info = IEEE80211_SKB_CB(skb); <<
849 525
850 if (info->control.hw_key && !! 526 if (tx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE) {
851 !(key->conf.flags & IEEE80211_KEY_ !! 527 /* hwaccel */
852 return TX_CONTINUE; !! 528 info->control.hw_key = &tx->key->conf;
>> 529 return 0;
>> 530 }
853 531
854 if (WARN_ON(skb_tailroom(skb) < sizeof 532 if (WARN_ON(skb_tailroom(skb) < sizeof(*mmie)))
855 return TX_DROP; 533 return TX_DROP;
856 534
857 mmie = skb_put(skb, sizeof(*mmie)); !! 535 mmie = (struct ieee80211_mmie *) skb_put(skb, sizeof(*mmie));
858 mmie->element_id = WLAN_EID_MMIE; 536 mmie->element_id = WLAN_EID_MMIE;
859 mmie->length = sizeof(*mmie) - 2; 537 mmie->length = sizeof(*mmie) - 2;
860 mmie->key_id = cpu_to_le16(key->conf.k 538 mmie->key_id = cpu_to_le16(key->conf.keyidx);
861 539
862 /* PN = PN + 1 */ 540 /* PN = PN + 1 */
863 pn64 = atomic64_inc_return(&key->conf. !! 541 pn = key->u.aes_cmac.tx_pn;
864 542
865 bip_ipn_set64(mmie->sequence_number, p !! 543 for (i = sizeof(key->u.aes_cmac.tx_pn) - 1; i >= 0; i--) {
866 !! 544 pn[i]++;
867 if (info->control.hw_key) !! 545 if (pn[i])
868 return TX_CONTINUE; !! 546 break;
>> 547 }
>> 548 bip_ipn_swap(mmie->sequence_number, pn);
869 549
870 bip_aad(skb, aad); 550 bip_aad(skb, aad);
871 551
872 /* 552 /*
873 * MIC = AES-128-CMAC(IGTK, AAD || Man 553 * MIC = AES-128-CMAC(IGTK, AAD || Management Frame Body || MMIE, 64)
874 */ 554 */
875 ieee80211_aes_cmac(key->u.aes_cmac.tfm !! 555 ieee80211_aes_cmac(key->u.aes_cmac.tfm, key->u.aes_cmac.tx_crypto_buf,
876 skb->data + 24, skb !! 556 aad, skb->data + 24, skb->len - 24, mmie->mic);
877 557
878 return TX_CONTINUE; 558 return TX_CONTINUE;
879 } 559 }
880 560
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 } <<
927 561
928 ieee80211_rx_result 562 ieee80211_rx_result
929 ieee80211_crypto_aes_cmac_decrypt(struct ieee8 563 ieee80211_crypto_aes_cmac_decrypt(struct ieee80211_rx_data *rx)
930 { 564 {
931 struct sk_buff *skb = rx->skb; 565 struct sk_buff *skb = rx->skb;
932 struct ieee80211_rx_status *status = I <<
933 struct ieee80211_key *key = rx->key; 566 struct ieee80211_key *key = rx->key;
934 struct ieee80211_mmie *mmie; 567 struct ieee80211_mmie *mmie;
935 u8 aad[20], mic[8], ipn[6]; 568 u8 aad[20], mic[8], ipn[6];
936 struct ieee80211_hdr *hdr = (struct ie 569 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
937 570
938 if (!ieee80211_is_mgmt(hdr->frame_cont 571 if (!ieee80211_is_mgmt(hdr->frame_control))
939 return RX_CONTINUE; 572 return RX_CONTINUE;
940 573
941 /* management frames are already linea !! 574 if ((rx->status->flag & RX_FLAG_DECRYPTED) &&
>> 575 (rx->status->flag & RX_FLAG_IV_STRIPPED))
>> 576 return RX_CONTINUE;
942 577
943 if (skb->len < 24 + sizeof(*mmie)) 578 if (skb->len < 24 + sizeof(*mmie))
944 return RX_DROP_U_SHORT_CMAC; !! 579 return RX_DROP_UNUSABLE;
945 580
946 mmie = (struct ieee80211_mmie *) 581 mmie = (struct ieee80211_mmie *)
947 (skb->data + skb->len - sizeof 582 (skb->data + skb->len - sizeof(*mmie));
948 if (mmie->element_id != WLAN_EID_MMIE 583 if (mmie->element_id != WLAN_EID_MMIE ||
949 mmie->length != sizeof(*mmie) - 2) 584 mmie->length != sizeof(*mmie) - 2)
950 return RX_DROP_U_BAD_MMIE; /* !! 585 return RX_DROP_UNUSABLE; /* Invalid MMIE */
951 586
952 bip_ipn_swap(ipn, mmie->sequence_numbe 587 bip_ipn_swap(ipn, mmie->sequence_number);
953 588
954 if (memcmp(ipn, key->u.aes_cmac.rx_pn, 589 if (memcmp(ipn, key->u.aes_cmac.rx_pn, 6) <= 0) {
955 key->u.aes_cmac.replays++; 590 key->u.aes_cmac.replays++;
956 return RX_DROP_U_REPLAY; !! 591 return RX_DROP_UNUSABLE;
957 } 592 }
958 593
959 if (!(status->flag & RX_FLAG_DECRYPTED !! 594 if (!(rx->status->flag & RX_FLAG_DECRYPTED)) {
960 /* hardware didn't decrypt/ver 595 /* hardware didn't decrypt/verify MIC */
961 bip_aad(skb, aad); 596 bip_aad(skb, aad);
962 ieee80211_aes_cmac(key->u.aes_ !! 597 ieee80211_aes_cmac(key->u.aes_cmac.tfm,
>> 598 key->u.aes_cmac.rx_crypto_buf, aad,
963 skb->data + 599 skb->data + 24, skb->len - 24, mic);
964 if (crypto_memneq(mic, mmie->m !! 600 if (memcmp(mic, mmie->mic, sizeof(mmie->mic)) != 0) {
965 key->u.aes_cmac.icverr 601 key->u.aes_cmac.icverrors++;
966 return RX_DROP_U_MIC_F !! 602 return RX_DROP_UNUSABLE;
967 } 603 }
968 } 604 }
969 605
970 memcpy(key->u.aes_cmac.rx_pn, ipn, 6); 606 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 } <<
1018 } <<
1019 <<
1020 memcpy(key->u.aes_cmac.rx_pn, ipn, 6) <<
1021 <<
1022 /* Remove MMIE */ <<
1023 skb_trim(skb, skb->len - sizeof(*mmie <<
1024 <<
1025 return RX_CONTINUE; <<
1026 } <<
1027 <<
1028 ieee80211_tx_result <<
1029 ieee80211_crypto_aes_gmac_encrypt(struct ieee <<
1030 { <<
1031 struct sk_buff *skb; <<
1032 struct ieee80211_tx_info *info; <<
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 <<
1073 /* MIC = AES-GMAC(IGTK, AAD || Manage <<
1074 if (ieee80211_aes_gmac(key->u.aes_gma <<
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 <<
1119 mic = kmalloc(GMAC_MIC_LEN, G <<
1120 if (!mic) <<
1121 return RX_DROP_U_OOM; <<
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 } <<
1132 <<
1133 memcpy(key->u.aes_gmac.rx_pn, ipn, 6) <<
1134 607
1135 /* Remove MMIE */ 608 /* Remove MMIE */
1136 skb_trim(skb, skb->len - sizeof(*mmie 609 skb_trim(skb, skb->len - sizeof(*mmie));
1137 610
1138 return RX_CONTINUE; 611 return RX_CONTINUE;
1139 } 612 }
1140 613
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