package/kernel/mac80211/patches/subsys/100-remove-cryptoapi-dependencies.patch

   1 --- a/net/mac80211/Makefile
   2 +++ b/net/mac80211/Makefile
   3 @@ -7,7 +7,6 @@ mac80211-y := \
   4         driver-ops.o \
   5         sta_info.o \
   6         wep.o \
   7 -       aead_api.o \
   8         wpa.o \
   9         scan.o offchannel.o \
  10         ht.o agg-tx.o agg-rx.o \
  11 @@ -18,8 +17,8 @@ mac80211-y := \
  12         rate.o \
  13         michael.o \
  14         tkip.o \
  15 +       aes_ccm.o \
  16         aes_cmac.o \
  17 -       aes_gmac.o \
  18         fils_aead.o \
  19         cfg.o \
  20         ethtool.o \
  21 --- a/net/mac80211/aead_api.c
  22 +++ /dev/null
  23 @@ -1,112 +0,0 @@
  24 -// SPDX-License-Identifier: GPL-2.0-only
  25 -/*
  26 - * Copyright 2003-2004, Instant802 Networks, Inc.
  27 - * Copyright 2005-2006, Devicescape Software, Inc.
  28 - * Copyright 2014-2015, Qualcomm Atheros, Inc.
  29 - *
  30 - * Rewrite: Copyright (C) 2013 Linaro Ltd <ard.biesheuvel@linaro.org>
  31 - */
  32 -
  33 -#include <linux/kernel.h>
  34 -#include <linux/types.h>
  35 -#include <linux/err.h>
  36 -#include <linux/scatterlist.h>
  37 -#include <crypto/aead.h>
  38 -
  39 -#include "aead_api.h"
  40 -
  41 -int aead_encrypt(struct crypto_aead *tfm, u8 *b_0, u8 *aad, size_t aad_len,
  42 -                u8 *data, size_t data_len, u8 *mic)
  43 -{
  44 -       size_t mic_len = crypto_aead_authsize(tfm);
  45 -       struct scatterlist sg[3];
  46 -       struct aead_request *aead_req;
  47 -       int reqsize = sizeof(*aead_req) + crypto_aead_reqsize(tfm);
  48 -       u8 *__aad;
  49 -
  50 -       aead_req = kzalloc(reqsize + aad_len, GFP_ATOMIC);
  51 -       if (!aead_req)
  52 -               return -ENOMEM;
  53 -
  54 -       __aad = (u8 *)aead_req + reqsize;
  55 -       memcpy(__aad, aad, aad_len);
  56 -
  57 -       sg_init_table(sg, 3);
  58 -       sg_set_buf(&sg[0], __aad, aad_len);
  59 -       sg_set_buf(&sg[1], data, data_len);
  60 -       sg_set_buf(&sg[2], mic, mic_len);
  61 -
  62 -       aead_request_set_tfm(aead_req, tfm);
  63 -       aead_request_set_crypt(aead_req, sg, sg, data_len, b_0);
  64 -       aead_request_set_ad(aead_req, sg[0].length);
  65 -
  66 -       crypto_aead_encrypt(aead_req);
  67 -       kzfree(aead_req);
  68 -
  69 -       return 0;
  70 -}
  71 -
  72 -int aead_decrypt(struct crypto_aead *tfm, u8 *b_0, u8 *aad, size_t aad_len,
  73 -                u8 *data, size_t data_len, u8 *mic)
  74 -{
  75 -       size_t mic_len = crypto_aead_authsize(tfm);
  76 -       struct scatterlist sg[3];
  77 -       struct aead_request *aead_req;
  78 -       int reqsize = sizeof(*aead_req) + crypto_aead_reqsize(tfm);
  79 -       u8 *__aad;
  80 -       int err;
  81 -
  82 -       if (data_len == 0)
  83 -               return -EINVAL;
  84 -
  85 -       aead_req = kzalloc(reqsize + aad_len, GFP_ATOMIC);
  86 -       if (!aead_req)
  87 -               return -ENOMEM;
  88 -
  89 -       __aad = (u8 *)aead_req + reqsize;
  90 -       memcpy(__aad, aad, aad_len);
  91 -
  92 -       sg_init_table(sg, 3);
  93 -       sg_set_buf(&sg[0], __aad, aad_len);
  94 -       sg_set_buf(&sg[1], data, data_len);
  95 -       sg_set_buf(&sg[2], mic, mic_len);
  96 -
  97 -       aead_request_set_tfm(aead_req, tfm);
  98 -       aead_request_set_crypt(aead_req, sg, sg, data_len + mic_len, b_0);
  99 -       aead_request_set_ad(aead_req, sg[0].length);
 100 -
 101 -       err = crypto_aead_decrypt(aead_req);
 102 -       kzfree(aead_req);
 103 -
 104 -       return err;
 105 -}
 106 -
 107 -struct crypto_aead *
 108 -aead_key_setup_encrypt(const char *alg, const u8 key[],
 109 -                      size_t key_len, size_t mic_len)
 110 -{
 111 -       struct crypto_aead *tfm;
 112 -       int err;
 113 -
 114 -       tfm = crypto_alloc_aead(alg, 0, CRYPTO_ALG_ASYNC);
 115 -       if (IS_ERR(tfm))
 116 -               return tfm;
 117 -
 118 -       err = crypto_aead_setkey(tfm, key, key_len);
 119 -       if (err)
 120 -               goto free_aead;
 121 -       err = crypto_aead_setauthsize(tfm, mic_len);
 122 -       if (err)
 123 -               goto free_aead;
 124 -
 125 -       return tfm;
 126 -
 127 -free_aead:
 128 -       crypto_free_aead(tfm);
 129 -       return ERR_PTR(err);
 130 -}
 131 -
 132 -void aead_key_free(struct crypto_aead *tfm)
 133 -{
 134 -       crypto_free_aead(tfm);
 135 -}
 136 --- a/net/mac80211/aead_api.h
 137 +++ /dev/null
 138 @@ -1,23 +0,0 @@
 139 -/* SPDX-License-Identifier: GPL-2.0-only */
 140 -
 141 -#ifndef _AEAD_API_H
 142 -#define _AEAD_API_H
 143 -
 144 -#include <crypto/aead.h>
 145 -#include <linux/crypto.h>
 146 -
 147 -struct crypto_aead *
 148 -aead_key_setup_encrypt(const char *alg, const u8 key[],
 149 -                      size_t key_len, size_t mic_len);
 150 -
 151 -int aead_encrypt(struct crypto_aead *tfm, u8 *b_0, u8 *aad,
 152 -                size_t aad_len, u8 *data,
 153 -                size_t data_len, u8 *mic);
 154 -
 155 -int aead_decrypt(struct crypto_aead *tfm, u8 *b_0, u8 *aad,
 156 -                size_t aad_len, u8 *data,
 157 -                size_t data_len, u8 *mic);
 158 -
 159 -void aead_key_free(struct crypto_aead *tfm);
 160 -
 161 -#endif /* _AEAD_API_H */
 162 --- a/net/mac80211/aes_ccm.h
 163 +++ b/net/mac80211/aes_ccm.h
 164 @@ -7,39 +7,17 @@
 165  #ifndef AES_CCM_H
 166  #define AES_CCM_H
 167
 168 -#include "aead_api.h"
 169 +#include <linux/crypto.h>
 170
 171 -#define CCM_AAD_LEN    32
 172 -
 173 -static inline struct crypto_aead *
 174 -ieee80211_aes_key_setup_encrypt(const u8 key[], size_t key_len, size_t mic_len)
 175 -{
 176 -       return aead_key_setup_encrypt("ccm(aes)", key, key_len, mic_len);
 177 -}
 178 -
 179 -static inline int
 180 -ieee80211_aes_ccm_encrypt(struct crypto_aead *tfm,
 181 -                         u8 *b_0, u8 *aad, u8 *data,
 182 -                         size_t data_len, u8 *mic)
 183 -{
 184 -       return aead_encrypt(tfm, b_0, aad + 2,
 185 -                           be16_to_cpup((__be16 *)aad),
 186 -                           data, data_len, mic);
 187 -}
 188 -
 189 -static inline int
 190 -ieee80211_aes_ccm_decrypt(struct crypto_aead *tfm,
 191 -                         u8 *b_0, u8 *aad, u8 *data,
 192 -                         size_t data_len, u8 *mic)
 193 -{
 194 -       return aead_decrypt(tfm, b_0, aad + 2,
 195 -                           be16_to_cpup((__be16 *)aad),
 196 -                           data, data_len, mic);
 197 -}
 198 -
 199 -static inline void ieee80211_aes_key_free(struct crypto_aead *tfm)
 200 -{
 201 -       return aead_key_free(tfm);
 202 -}
 203 +struct crypto_cipher *ieee80211_aes_key_setup_encrypt(const u8 key[],
 204 +                                                     size_t key_len,
 205 +                                                     size_t mic_len);
 206 +void ieee80211_aes_ccm_encrypt(struct crypto_cipher *tfm, u8 *b_0, u8 *aad,
 207 +                              u8 *data, size_t data_len, u8 *mic,
 208 +                              size_t mic_len);
 209 +int ieee80211_aes_ccm_decrypt(struct crypto_cipher *tfm, u8 *b_0, u8 *aad,
 210 +                             u8 *data, size_t data_len, u8 *mic,
 211 +                             size_t mic_len);
 212 +void ieee80211_aes_key_free(struct crypto_cipher *tfm);
 213
 214  #endif /* AES_CCM_H */
 215 --- /dev/null
 216 +++ b/net/mac80211/aes_gcm.c
 217 @@ -0,0 +1,109 @@
 218 +/*
 219 + * Copyright 2014-2015, Qualcomm Atheros, Inc.
 220 + *
 221 + * This program is free software; you can redistribute it and/or modify
 222 + * it under the terms of the GNU General Public License version 2 as
 223 + * published by the Free Software Foundation.
 224 + */
 225 +
 226 +#include <linux/kernel.h>
 227 +#include <linux/types.h>
 228 +#include <linux/err.h>
 229 +#include <crypto/aead.h>
 230 +
 231 +#include <net/mac80211.h>
 232 +#include "key.h"
 233 +#include "aes_gcm.h"
 234 +
 235 +int ieee80211_aes_gcm_encrypt(struct crypto_aead *tfm, u8 *j_0, u8 *aad,
 236 +                             u8 *data, size_t data_len, u8 *mic)
 237 +{
 238 +       struct scatterlist sg[3];
 239 +       struct aead_request *aead_req;
 240 +       int reqsize = sizeof(*aead_req) + crypto_aead_reqsize(tfm);
 241 +       u8 *__aad;
 242 +
 243 +       aead_req = kzalloc(reqsize + GCM_AAD_LEN, GFP_ATOMIC);
 244 +       if (!aead_req)
 245 +               return -ENOMEM;
 246 +
 247 +       __aad = (u8 *)aead_req + reqsize;
 248 +       memcpy(__aad, aad, GCM_AAD_LEN);
 249 +
 250 +       sg_init_table(sg, 3);
 251 +       sg_set_buf(&sg[0], &__aad[2], be16_to_cpup((__be16 *)__aad));
 252 +       sg_set_buf(&sg[1], data, data_len);
 253 +       sg_set_buf(&sg[2], mic, IEEE80211_GCMP_MIC_LEN);
 254 +
 255 +       aead_request_set_tfm(aead_req, tfm);
 256 +       aead_request_set_crypt(aead_req, sg, sg, data_len, j_0);
 257 +       aead_request_set_ad(aead_req, sg[0].length);
 258 +
 259 +       crypto_aead_encrypt(aead_req);
 260 +       kzfree(aead_req);
 261 +       return 0;
 262 +}
 263 +
 264 +int ieee80211_aes_gcm_decrypt(struct crypto_aead *tfm, u8 *j_0, u8 *aad,
 265 +                             u8 *data, size_t data_len, u8 *mic)
 266 +{
 267 +       struct scatterlist sg[3];
 268 +       struct aead_request *aead_req;
 269 +       int reqsize = sizeof(*aead_req) + crypto_aead_reqsize(tfm);
 270 +       u8 *__aad;
 271 +       int err;
 272 +
 273 +       if (data_len == 0)
 274 +               return -EINVAL;
 275 +
 276 +       aead_req = kzalloc(reqsize + GCM_AAD_LEN, GFP_ATOMIC);
 277 +       if (!aead_req)
 278 +               return -ENOMEM;
 279 +
 280 +       __aad = (u8 *)aead_req + reqsize;
 281 +       memcpy(__aad, aad, GCM_AAD_LEN);
 282 +
 283 +       sg_init_table(sg, 3);
 284 +       sg_set_buf(&sg[0], &__aad[2], be16_to_cpup((__be16 *)__aad));
 285 +       sg_set_buf(&sg[1], data, data_len);
 286 +       sg_set_buf(&sg[2], mic, IEEE80211_GCMP_MIC_LEN);
 287 +
 288 +       aead_request_set_tfm(aead_req, tfm);
 289 +       aead_request_set_crypt(aead_req, sg, sg,
 290 +                              data_len + IEEE80211_GCMP_MIC_LEN, j_0);
 291 +       aead_request_set_ad(aead_req, sg[0].length);
 292 +
 293 +       err = crypto_aead_decrypt(aead_req);
 294 +       kzfree(aead_req);
 295 +
 296 +       return err;
 297 +}
 298 +
 299 +struct crypto_aead *ieee80211_aes_gcm_key_setup_encrypt(const u8 key[],
 300 +                                                       size_t key_len)
 301 +{
 302 +       struct crypto_aead *tfm;
 303 +       int err;
 304 +
 305 +       tfm = crypto_alloc_aead("gcm(aes)", 0, CRYPTO_ALG_ASYNC);
 306 +       if (IS_ERR(tfm))
 307 +               return tfm;
 308 +
 309 +       err = crypto_aead_setkey(tfm, key, key_len);
 310 +       if (err)
 311 +               goto free_aead;
 312 +       err = crypto_aead_setauthsize(tfm, IEEE80211_GCMP_MIC_LEN);
 313 +       if (err)
 314 +               goto free_aead;
 315 +
 316 +       return tfm;
 317 +
 318 +free_aead:
 319 +       crypto_free_aead(tfm);
 320 +       return ERR_PTR(err);
 321 +}
 322 +
 323 +void ieee80211_aes_gcm_key_free(struct crypto_aead *tfm)
 324 +{
 325 +       crypto_free_aead(tfm);
 326 +}
 327 --- a/net/mac80211/aes_gcm.h
 328 +++ b/net/mac80211/aes_gcm.h
 329 @@ -6,38 +6,30 @@
 330  #ifndef AES_GCM_H
 331  #define AES_GCM_H
 332
 333 -#include "aead_api.h"
 334 +#include <linux/crypto.h>
 335
 336 -#define GCM_AAD_LEN    32
 337 -
 338 -static inline int ieee80211_aes_gcm_encrypt(struct crypto_aead *tfm,
 339 -                                           u8 *j_0, u8 *aad,  u8 *data,
 340 -                                           size_t data_len, u8 *mic)
 341 +static inline void
 342 +ieee80211_aes_gcm_encrypt(struct crypto_aead *tfm, u8 *j_0, u8 *aad,
 343 +                         u8 *data, size_t data_len, u8 *mic)
 344  {
 345 -       return aead_encrypt(tfm, j_0, aad + 2,
 346 -                           be16_to_cpup((__be16 *)aad),
 347 -                           data, data_len, mic);
 348  }
 349
 350 -static inline int ieee80211_aes_gcm_decrypt(struct crypto_aead *tfm,
 351 -                                           u8 *j_0, u8 *aad, u8 *data,
 352 -                                           size_t data_len, u8 *mic)
 353 +static inline int
 354 +ieee80211_aes_gcm_decrypt(struct crypto_aead *tfm, u8 *j_0, u8 *aad,
 355 +                         u8 *data, size_t data_len, u8 *mic)
 356  {
 357 -       return aead_decrypt(tfm, j_0, aad + 2,
 358 -                           be16_to_cpup((__be16 *)aad),
 359 -                           data, data_len, mic);
 360 +    return -EOPNOTSUPP;
 361  }
 362
 363  static inline struct crypto_aead *
 364  ieee80211_aes_gcm_key_setup_encrypt(const u8 key[], size_t key_len)
 365  {
 366 -       return aead_key_setup_encrypt("gcm(aes)", key,
 367 -                                     key_len, IEEE80211_GCMP_MIC_LEN);
 368 +    return NULL;
 369  }
 370
 371 -static inline void ieee80211_aes_gcm_key_free(struct crypto_aead *tfm)
 372 +static inline void
 373 +ieee80211_aes_gcm_key_free(struct crypto_aead *tfm)
 374  {
 375 -       return aead_key_free(tfm);
 376  }
 377
 378  #endif /* AES_GCM_H */
 379 --- a/net/mac80211/wpa.c
 380 +++ b/net/mac80211/wpa.c
 381 @@ -311,7 +311,8 @@ ieee80211_crypto_tkip_decrypt(struct iee
 382  }
 383
 384
 385 -static void ccmp_special_blocks(struct sk_buff *skb, u8 *pn, u8 *b_0, u8 *aad)
 386 +static void ccmp_special_blocks(struct sk_buff *skb, u8 *pn, u8 *b_0, u8 *aad,
 387 +                               u16 data_len)
 388  {
 389         __le16 mask_fc;
 390         int a4_included, mgmt;
 391 @@ -341,14 +342,8 @@ static void ccmp_special_blocks(struct s
 392         else
 393                 qos_tid = 0;
 394
 395 -       /* In CCM, the initial vectors (IV) used for CTR mode encryption and CBC
 396 -        * mode authentication are not allowed to collide, yet both are derived
 397 -        * from this vector b_0. We only set L := 1 here to indicate that the
 398 -        * data size can be represented in (L+1) bytes. The CCM layer will take
 399 -        * care of storing the data length in the top (L+1) bytes and setting
 400 -        * and clearing the other bits as is required to derive the two IVs.
 401 -        */
 402 -       b_0[0] = 0x1;
 403 +       /* First block, b_0 */
 404 +       b_0[0] = 0x59; /* flags: Adata: 1, M: 011, L: 001 */
 405
 406         /* Nonce: Nonce Flags | A2 | PN
 407          * Nonce Flags: Priority (b0..b3) | Management (b4) | Reserved (b5..b7)
 408 @@ -356,6 +351,8 @@ static void ccmp_special_blocks(struct s
 409         b_0[1] = qos_tid | (mgmt << 4);
 410         memcpy(&b_0[2], hdr->addr2, ETH_ALEN);
 411         memcpy(&b_0[8], pn, IEEE80211_CCMP_PN_LEN);
 412 +       /* l(m) */
 413 +       put_unaligned_be16(data_len, &b_0[14]);
 414
 415         /* AAD (extra authenticate-only data) / masked 802.11 header
 416          * FC | A1 | A2 | A3 | SC | [A4] | [QC] */
 417 @@ -412,7 +409,7 @@ static int ccmp_encrypt_skb(struct ieee8
 418         u8 *pos;
 419         u8 pn[6];
 420         u64 pn64;
 421 -       u8 aad[CCM_AAD_LEN];
 422 +       u8 aad[2 * AES_BLOCK_SIZE];
 423         u8 b_0[AES_BLOCK_SIZE];
 424
 425         if (info->control.hw_key &&
 426 @@ -467,9 +464,11 @@ static int ccmp_encrypt_skb(struct ieee8
 427                 return 0;
 428
 429         pos += IEEE80211_CCMP_HDR_LEN;
 430 -       ccmp_special_blocks(skb, pn, b_0, aad);
 431 -       return ieee80211_aes_ccm_encrypt(key->u.ccmp.tfm, b_0, aad, pos, len,
 432 -                                        skb_put(skb, mic_len));
 433 +       ccmp_special_blocks(skb, pn, b_0, aad, len);
 434 +       ieee80211_aes_ccm_encrypt(key->u.ccmp.tfm, b_0, aad, pos, len,
 435 +                                 skb_put(skb, mic_len), mic_len);
 436 +
 437 +       return 0;
 438  }
 439
 440
 441 @@ -542,13 +541,13 @@ ieee80211_crypto_ccmp_decrypt(struct iee
 442                         u8 aad[2 * AES_BLOCK_SIZE];
 443                         u8 b_0[AES_BLOCK_SIZE];
 444                         /* hardware didn't decrypt/verify MIC */
 445 -                       ccmp_special_blocks(skb, pn, b_0, aad);
 446 +                       ccmp_special_blocks(skb, pn, b_0, aad, data_len);
 447
 448                         if (ieee80211_aes_ccm_decrypt(
 449                                     key->u.ccmp.tfm, b_0, aad,
 450                                     skb->data + hdrlen + IEEE80211_CCMP_HDR_LEN,
 451                                     data_len,
 452 -                                   skb->data + skb->len - mic_len))
 453 +                                   skb->data + skb->len - mic_len, mic_len))
 454                                 return RX_DROP_UNUSABLE;
 455                 }
 456
 457 @@ -643,7 +642,7 @@ static int gcmp_encrypt_skb(struct ieee8
 458         u8 *pos;
 459         u8 pn[6];
 460         u64 pn64;
 461 -       u8 aad[GCM_AAD_LEN];
 462 +       u8 aad[2 * AES_BLOCK_SIZE];
 463         u8 j_0[AES_BLOCK_SIZE];
 464
 465         if (info->control.hw_key &&
 466 @@ -700,8 +699,10 @@ static int gcmp_encrypt_skb(struct ieee8
 467
 468         pos += IEEE80211_GCMP_HDR_LEN;
 469         gcmp_special_blocks(skb, pn, j_0, aad);
 470 -       return ieee80211_aes_gcm_encrypt(key->u.gcmp.tfm, j_0, aad, pos, len,
 471 -                                        skb_put(skb, IEEE80211_GCMP_MIC_LEN));
 472 +       ieee80211_aes_gcm_encrypt(key->u.gcmp.tfm, j_0, aad, pos, len,
 473 +                                 skb_put(skb, IEEE80211_GCMP_MIC_LEN));
 474 +
 475 +       return 0;
 476  }
 477
 478  ieee80211_tx_result
 479 @@ -1124,9 +1125,9 @@ ieee80211_crypto_aes_gmac_encrypt(struct
 480         struct ieee80211_key *key = tx->key;
 481         struct ieee80211_mmie_16 *mmie;
 482         struct ieee80211_hdr *hdr;
 483 -       u8 aad[GMAC_AAD_LEN];
 484 +       u8 aad[20];
 485         u64 pn64;
 486 -       u8 nonce[GMAC_NONCE_LEN];
 487 +       u8 nonce[12];
 488
 489         if (WARN_ON(skb_queue_len(&tx->skbs) != 1))
 490                 return TX_DROP;
 491 @@ -1172,7 +1173,7 @@ ieee80211_crypto_aes_gmac_decrypt(struct
 492         struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
 493         struct ieee80211_key *key = rx->key;
 494         struct ieee80211_mmie_16 *mmie;
 495 -       u8 aad[GMAC_AAD_LEN], *mic, ipn[6], nonce[GMAC_NONCE_LEN];
 496 +       u8 aad[20], *mic, ipn[6], nonce[12];
 497         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
 498
 499         if (!ieee80211_is_mgmt(hdr->frame_control))
 500 --- /dev/null
 501 +++ b/net/mac80211/aes_ccm.c
 502 @@ -0,0 +1,144 @@
 503 +/*
 504 + * Copyright 2003-2004, Instant802 Networks, Inc.
 505 + * Copyright 2005-2006, Devicescape Software, Inc.
 506 + *
 507 + * Rewrite: Copyright (C) 2013 Linaro Ltd <ard.biesheuvel@linaro.org>
 508 + *
 509 + * This program is free software; you can redistribute it and/or modify
 510 + * it under the terms of the GNU General Public License version 2 as
 511 + * published by the Free Software Foundation.
 512 + */
 513 +
 514 +#include <linux/kernel.h>
 515 +#include <linux/types.h>
 516 +#include <linux/err.h>
 517 +#include <crypto/aead.h>
 518 +#include <crypto/aes.h>
 519 +
 520 +#include <net/mac80211.h>
 521 +#include "key.h"
 522 +#include "aes_ccm.h"
 523 +
 524 +static void aes_ccm_prepare(struct crypto_cipher *tfm, u8 *b_0, u8 *aad, u8 *s_0,
 525 +                           u8 *a, u8 *b)
 526 +{
 527 +       int i;
 528 +
 529 +       crypto_cipher_encrypt_one(tfm, b, b_0);
 530 +
 531 +       /* Extra Authenticate-only data (always two AES blocks) */
 532 +       for (i = 0; i < AES_BLOCK_SIZE; i++)
 533 +               aad[i] ^= b[i];
 534 +       crypto_cipher_encrypt_one(tfm, b, aad);
 535 +
 536 +       aad += AES_BLOCK_SIZE;
 537 +
 538 +       for (i = 0; i < AES_BLOCK_SIZE; i++)
 539 +               aad[i] ^= b[i];
 540 +       crypto_cipher_encrypt_one(tfm, a, aad);
 541 +
 542 +       /* Mask out bits from auth-only-b_0 */
 543 +       b_0[0] &= 0x07;
 544 +
 545 +       /* S_0 is used to encrypt T (= MIC) */
 546 +       b_0[14] = 0;
 547 +       b_0[15] = 0;
 548 +       crypto_cipher_encrypt_one(tfm, s_0, b_0);
 549 +}
 550 +
 551 +
 552 +void ieee80211_aes_ccm_encrypt(struct crypto_cipher *tfm, u8 *b_0, u8 *aad,
 553 +                              u8 *data, size_t data_len, u8 *mic,
 554 +                              size_t mic_len)
 555 +{
 556 +       int i, j, last_len, num_blocks;
 557 +       u8 b[AES_BLOCK_SIZE];
 558 +       u8 s_0[AES_BLOCK_SIZE];
 559 +       u8 e[AES_BLOCK_SIZE];
 560 +       u8 *pos, *cpos;
 561 +
 562 +       num_blocks = DIV_ROUND_UP(data_len, AES_BLOCK_SIZE);
 563 +       last_len = data_len % AES_BLOCK_SIZE;
 564 +       aes_ccm_prepare(tfm, b_0, aad, s_0, b, b);
 565 +
 566 +       /* Process payload blocks */
 567 +       pos = data;
 568 +       cpos = data;
 569 +       for (j = 1; j <= num_blocks; j++) {
 570 +               int blen = (j == num_blocks && last_len) ?
 571 +                       last_len : AES_BLOCK_SIZE;
 572 +
 573 +               /* Authentication followed by encryption */
 574 +               for (i = 0; i < blen; i++)
 575 +                       b[i] ^= pos[i];
 576 +               crypto_cipher_encrypt_one(tfm, b, b);
 577 +
 578 +               b_0[14] = (j >> 8) & 0xff;
 579 +               b_0[15] = j & 0xff;
 580 +               crypto_cipher_encrypt_one(tfm, e, b_0);
 581 +               for (i = 0; i < blen; i++)
 582 +                       *cpos++ = *pos++ ^ e[i];
 583 +       }
 584 +
 585 +       for (i = 0; i < mic_len; i++)
 586 +               mic[i] = b[i] ^ s_0[i];
 587 +}
 588 +
 589 +int ieee80211_aes_ccm_decrypt(struct crypto_cipher *tfm, u8 *b_0, u8 *aad,
 590 +                             u8 *data, size_t data_len, u8 *mic,
 591 +                             size_t mic_len)
 592 +{
 593 +       int i, j, last_len, num_blocks;
 594 +       u8 *pos, *cpos;
 595 +       u8 a[AES_BLOCK_SIZE];
 596 +       u8 b[AES_BLOCK_SIZE];
 597 +       u8 s_0[AES_BLOCK_SIZE];
 598 +
 599 +       num_blocks = DIV_ROUND_UP(data_len, AES_BLOCK_SIZE);
 600 +       last_len = data_len % AES_BLOCK_SIZE;
 601 +       aes_ccm_prepare(tfm, b_0, aad, s_0, a, b);
 602 +
 603 +       /* Process payload blocks */
 604 +       cpos = data;
 605 +       pos = data;
 606 +       for (j = 1; j <= num_blocks; j++) {
 607 +               int blen = (j == num_blocks && last_len) ?
 608 +                       last_len : AES_BLOCK_SIZE;
 609 +
 610 +               /* Decryption followed by authentication */
 611 +               b_0[14] = (j >> 8) & 0xff;
 612 +               b_0[15] = j & 0xff;
 613 +               crypto_cipher_encrypt_one(tfm, b, b_0);
 614 +               for (i = 0; i < blen; i++) {
 615 +                       *pos = *cpos++ ^ b[i];
 616 +                       a[i] ^= *pos++;
 617 +               }
 618 +               crypto_cipher_encrypt_one(tfm, a, a);
 619 +       }
 620 +
 621 +       for (i = 0; i < mic_len; i++) {
 622 +               if ((mic[i] ^ s_0[i]) != a[i])
 623 +                       return -1;
 624 +       }
 625 +
 626 +       return 0;
 627 +}
 628 +
 629 +struct crypto_cipher *ieee80211_aes_key_setup_encrypt(const u8 key[],
 630 +                                                     size_t key_len,
 631 +                                                     size_t mic_len)
 632 +{
 633 +       struct crypto_cipher *tfm;
 634 +
 635 +       tfm = crypto_alloc_cipher("aes", 0, CRYPTO_ALG_ASYNC);
 636 +       if (!IS_ERR(tfm))
 637 +               crypto_cipher_setkey(tfm, key, key_len);
 638 +
 639 +       return tfm;
 640 +}
 641 +
 642 +
 643 +void ieee80211_aes_key_free(struct crypto_cipher *tfm)
 644 +{
 645 +       crypto_free_cipher(tfm);
 646 +}
 647 --- a/net/mac80211/Kconfig
 648 +++ b/net/mac80211/Kconfig
 649 @@ -6,8 +6,6 @@ config MAC80211
 650         depends on CRYPTO
 651         select BPAUTO_CRYPTO_LIB_ARC4
 652         depends on CRYPTO_AES
 653 -       depends on CRYPTO_CCM
 654 -       depends on CRYPTO_GCM
 655         depends on CRYPTO_CMAC
 656         depends on CRC32
 657         ---help---
 658 --- a/net/mac80211/aes_gmac.h
 659 +++ b/net/mac80211/aes_gmac.h
 660 @@ -12,10 +12,22 @@
 661  #define GMAC_MIC_LEN   16
 662  #define GMAC_NONCE_LEN 12
 663
 664 -struct crypto_aead *ieee80211_aes_gmac_key_setup(const u8 key[],
 665 -                                                size_t key_len);
 666 -int ieee80211_aes_gmac(struct crypto_aead *tfm, const u8 *aad, u8 *nonce,
 667 -                      const u8 *data, size_t data_len, u8 *mic);
 668 -void ieee80211_aes_gmac_key_free(struct crypto_aead *tfm);
 669 +static inline struct crypto_aead *
 670 +ieee80211_aes_gmac_key_setup(const u8 key[], size_t key_len)
 671 +{
 672 +       return NULL;
 673 +}
 674 +
 675 +static inline int
 676 +ieee80211_aes_gmac(struct crypto_aead *tfm, const u8 *aad, u8 *nonce,
 677 +                  const u8 *data, size_t data_len, u8 *mic)
 678 +{
 679 +       return -EOPNOTSUPP;
 680 +}
 681 +
 682 +static inline void
 683 +ieee80211_aes_gmac_key_free(struct crypto_aead *tfm)
 684 +{
 685 +}
 686
 687  #endif /* AES_GMAC_H */
 688 --- a/net/mac80211/key.h
 689 +++ b/net/mac80211/key.h
 690 @@ -87,7 +87,7 @@ struct ieee80211_key {
 691                          * Management frames.
 692                          */
 693                         u8 rx_pn[IEEE80211_NUM_TIDS + 1][IEEE80211_CCMP_PN_LEN];
 694 -                       struct crypto_aead *tfm;
 695 +                       struct crypto_cipher *tfm;
 696                         u32 replays; /* dot11RSNAStatsCCMPReplays */
 697                 } ccmp;
 698                 struct {