arch/x86/crypto/aesni-intel_glue.c

   1 /*
   2  * Support for Intel AES-NI instructions. This file contains glue
   3  * code, the real AES implementation is in intel-aes_asm.S.
   4  *
   5  * Copyright (C) 2008, Intel Corp.
   6  *    Author: Huang Ying <ying.huang@intel.com>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  */
  13
  14 #include <linux/hardirq.h>
  15 #include <linux/types.h>
  16 #include <linux/crypto.h>
  17 #include <linux/err.h>
  18 #include <crypto/algapi.h>
  19 #include <crypto/aes.h>
  20 #include <crypto/cryptd.h>
  21 #include <asm/i387.h>
  22 #include <asm/aes.h>
  23
  24 #if defined(CONFIG_CRYPTO_CTR) || defined(CONFIG_CRYPTO_CTR_MODULE)
  25 #define HAS_CTR
  26 #endif
  27
  28 #if defined(CONFIG_CRYPTO_LRW) || defined(CONFIG_CRYPTO_LRW_MODULE)
  29 #define HAS_LRW
  30 #endif
  31
  32 #if defined(CONFIG_CRYPTO_PCBC) || defined(CONFIG_CRYPTO_PCBC_MODULE)
  33 #define HAS_PCBC
  34 #endif
  35
  36 #if defined(CONFIG_CRYPTO_XTS) || defined(CONFIG_CRYPTO_XTS_MODULE)
  37 #define HAS_XTS
  38 #endif
  39
  40 struct async_aes_ctx {
  41         struct cryptd_ablkcipher *cryptd_tfm;
  42 };
  43
  44 #define AESNI_ALIGN     16
  45 #define AES_BLOCK_MASK  (~(AES_BLOCK_SIZE-1))
  46
  47 asmlinkage int aesni_set_key(struct crypto_aes_ctx *ctx, const u8 *in_key,
  48                              unsigned int key_len);
  49 asmlinkage void aesni_enc(struct crypto_aes_ctx *ctx, u8 *out,
  50                           const u8 *in);
  51 asmlinkage void aesni_dec(struct crypto_aes_ctx *ctx, u8 *out,
  52                           const u8 *in);
  53 asmlinkage void aesni_ecb_enc(struct crypto_aes_ctx *ctx, u8 *out,
  54                               const u8 *in, unsigned int len);
  55 asmlinkage void aesni_ecb_dec(struct crypto_aes_ctx *ctx, u8 *out,
  56                               const u8 *in, unsigned int len);
  57 asmlinkage void aesni_cbc_enc(struct crypto_aes_ctx *ctx, u8 *out,
  58                               const u8 *in, unsigned int len, u8 *iv);
  59 asmlinkage void aesni_cbc_dec(struct crypto_aes_ctx *ctx, u8 *out,
  60                               const u8 *in, unsigned int len, u8 *iv);
  61
  62 static inline int kernel_fpu_using(void)
  63 {
  64         if (in_interrupt() && !(read_cr0() & X86_CR0_TS))
  65                 return 1;
  66         return 0;
  67 }
  68
  69 static inline struct crypto_aes_ctx *aes_ctx(void *raw_ctx)
  70 {
  71         unsigned long addr = (unsigned long)raw_ctx;
  72         unsigned long align = AESNI_ALIGN;
  73
  74         if (align <= crypto_tfm_ctx_alignment())
  75                 align = 1;
  76         return (struct crypto_aes_ctx *)ALIGN(addr, align);
  77 }
  78
  79 static int aes_set_key_common(struct crypto_tfm *tfm, void *raw_ctx,
  80                               const u8 *in_key, unsigned int key_len)
  81 {
  82         struct crypto_aes_ctx *ctx = aes_ctx(raw_ctx);
  83         u32 *flags = &tfm->crt_flags;
  84         int err;
  85
  86         if (key_len != AES_KEYSIZE_128 && key_len != AES_KEYSIZE_192 &&
  87             key_len != AES_KEYSIZE_256) {
  88                 *flags |= CRYPTO_TFM_RES_BAD_KEY_LEN;
  89                 return -EINVAL;
  90         }
  91
  92         if (kernel_fpu_using())
  93                 err = crypto_aes_expand_key(ctx, in_key, key_len);
  94         else {
  95                 kernel_fpu_begin();
  96                 err = aesni_set_key(ctx, in_key, key_len);
  97                 kernel_fpu_end();
  98         }
  99
 100         return err;
 101 }
 102
 103 static int aes_set_key(struct crypto_tfm *tfm, const u8 *in_key,
 104                        unsigned int key_len)
 105 {
 106         return aes_set_key_common(tfm, crypto_tfm_ctx(tfm), in_key, key_len);
 107 }
 108
 109 static void aes_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
 110 {
 111         struct crypto_aes_ctx *ctx = aes_ctx(crypto_tfm_ctx(tfm));
 112
 113         if (kernel_fpu_using())
 114                 crypto_aes_encrypt_x86(ctx, dst, src);
 115         else {
 116                 kernel_fpu_begin();
 117                 aesni_enc(ctx, dst, src);
 118                 kernel_fpu_end();
 119         }
 120 }
 121
 122 static void aes_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
 123 {
 124         struct crypto_aes_ctx *ctx = aes_ctx(crypto_tfm_ctx(tfm));
 125
 126         if (kernel_fpu_using())
 127                 crypto_aes_decrypt_x86(ctx, dst, src);
 128         else {
 129                 kernel_fpu_begin();
 130                 aesni_dec(ctx, dst, src);
 131                 kernel_fpu_end();
 132         }
 133 }
 134
 135 static struct crypto_alg aesni_alg = {
 136         .cra_name               = "aes",
 137         .cra_driver_name        = "aes-aesni",
 138         .cra_priority           = 300,
 139         .cra_flags              = CRYPTO_ALG_TYPE_CIPHER,
 140         .cra_blocksize          = AES_BLOCK_SIZE,
 141         .cra_ctxsize            = sizeof(struct crypto_aes_ctx)+AESNI_ALIGN-1,
 142         .cra_alignmask          = 0,
 143         .cra_module             = THIS_MODULE,
 144         .cra_list               = LIST_HEAD_INIT(aesni_alg.cra_list),
 145         .cra_u  = {
 146                 .cipher = {
 147                         .cia_min_keysize        = AES_MIN_KEY_SIZE,
 148                         .cia_max_keysize        = AES_MAX_KEY_SIZE,
 149                         .cia_setkey             = aes_set_key,
 150                         .cia_encrypt            = aes_encrypt,
 151                         .cia_decrypt            = aes_decrypt
 152                 }
 153         }
 154 };
 155
 156 static void __aes_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
 157 {
 158         struct crypto_aes_ctx *ctx = aes_ctx(crypto_tfm_ctx(tfm));
 159
 160         aesni_enc(ctx, dst, src);
 161 }
 162
 163 static void __aes_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
 164 {
 165         struct crypto_aes_ctx *ctx = aes_ctx(crypto_tfm_ctx(tfm));
 166
 167         aesni_dec(ctx, dst, src);
 168 }
 169
 170 static struct crypto_alg __aesni_alg = {
 171         .cra_name               = "__aes-aesni",
 172         .cra_driver_name        = "__driver-aes-aesni",
 173         .cra_priority           = 0,
 174         .cra_flags              = CRYPTO_ALG_TYPE_CIPHER,
 175         .cra_blocksize          = AES_BLOCK_SIZE,
 176         .cra_ctxsize            = sizeof(struct crypto_aes_ctx)+AESNI_ALIGN-1,
 177         .cra_alignmask          = 0,
 178         .cra_module             = THIS_MODULE,
 179         .cra_list               = LIST_HEAD_INIT(__aesni_alg.cra_list),
 180         .cra_u  = {
 181                 .cipher = {
 182                         .cia_min_keysize        = AES_MIN_KEY_SIZE,
 183                         .cia_max_keysize        = AES_MAX_KEY_SIZE,
 184                         .cia_setkey             = aes_set_key,
 185                         .cia_encrypt            = __aes_encrypt,
 186                         .cia_decrypt            = __aes_decrypt
 187                 }
 188         }
 189 };
 190
 191 static int ecb_encrypt(struct blkcipher_desc *desc,
 192                        struct scatterlist *dst, struct scatterlist *src,
 193                        unsigned int nbytes)
 194 {
 195         struct crypto_aes_ctx *ctx = aes_ctx(crypto_blkcipher_ctx(desc->tfm));
 196         struct blkcipher_walk walk;
 197         int err;
 198
 199         blkcipher_walk_init(&walk, dst, src, nbytes);
 200         err = blkcipher_walk_virt(desc, &walk);
 201         desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
 202
 203         kernel_fpu_begin();
 204         while ((nbytes = walk.nbytes)) {
 205                 aesni_ecb_enc(ctx, walk.dst.virt.addr, walk.src.virt.addr,
 206                               nbytes & AES_BLOCK_MASK);
 207                 nbytes &= AES_BLOCK_SIZE - 1;
 208                 err = blkcipher_walk_done(desc, &walk, nbytes);
 209         }
 210         kernel_fpu_end();
 211
 212         return err;
 213 }
 214
 215 static int ecb_decrypt(struct blkcipher_desc *desc,
 216                        struct scatterlist *dst, struct scatterlist *src,
 217                        unsigned int nbytes)
 218 {
 219         struct crypto_aes_ctx *ctx = aes_ctx(crypto_blkcipher_ctx(desc->tfm));
 220         struct blkcipher_walk walk;
 221         int err;
 222
 223         blkcipher_walk_init(&walk, dst, src, nbytes);
 224         err = blkcipher_walk_virt(desc, &walk);
 225         desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
 226
 227         kernel_fpu_begin();
 228         while ((nbytes = walk.nbytes)) {
 229                 aesni_ecb_dec(ctx, walk.dst.virt.addr, walk.src.virt.addr,
 230                               nbytes & AES_BLOCK_MASK);
 231                 nbytes &= AES_BLOCK_SIZE - 1;
 232                 err = blkcipher_walk_done(desc, &walk, nbytes);
 233         }
 234         kernel_fpu_end();
 235
 236         return err;
 237 }
 238
 239 static struct crypto_alg blk_ecb_alg = {
 240         .cra_name               = "__ecb-aes-aesni",
 241         .cra_driver_name        = "__driver-ecb-aes-aesni",
 242         .cra_priority           = 0,
 243         .cra_flags              = CRYPTO_ALG_TYPE_BLKCIPHER,
 244         .cra_blocksize          = AES_BLOCK_SIZE,
 245         .cra_ctxsize            = sizeof(struct crypto_aes_ctx)+AESNI_ALIGN-1,
 246         .cra_alignmask          = 0,
 247         .cra_type               = &crypto_blkcipher_type,
 248         .cra_module             = THIS_MODULE,
 249         .cra_list               = LIST_HEAD_INIT(blk_ecb_alg.cra_list),
 250         .cra_u = {
 251                 .blkcipher = {
 252                         .min_keysize    = AES_MIN_KEY_SIZE,
 253                         .max_keysize    = AES_MAX_KEY_SIZE,
 254                         .setkey         = aes_set_key,
 255                         .encrypt        = ecb_encrypt,
 256                         .decrypt        = ecb_decrypt,
 257                 },
 258         },
 259 };
 260
 261 static int cbc_encrypt(struct blkcipher_desc *desc,
 262                        struct scatterlist *dst, struct scatterlist *src,
 263                        unsigned int nbytes)
 264 {
 265         struct crypto_aes_ctx *ctx = aes_ctx(crypto_blkcipher_ctx(desc->tfm));
 266         struct blkcipher_walk walk;
 267         int err;
 268
 269         blkcipher_walk_init(&walk, dst, src, nbytes);
 270         err = blkcipher_walk_virt(desc, &walk);
 271         desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
 272
 273         kernel_fpu_begin();
 274         while ((nbytes = walk.nbytes)) {
 275                 aesni_cbc_enc(ctx, walk.dst.virt.addr, walk.src.virt.addr,
 276                               nbytes & AES_BLOCK_MASK, walk.iv);
 277                 nbytes &= AES_BLOCK_SIZE - 1;
 278                 err = blkcipher_walk_done(desc, &walk, nbytes);
 279         }
 280         kernel_fpu_end();
 281
 282         return err;
 283 }
 284
 285 static int cbc_decrypt(struct blkcipher_desc *desc,
 286                        struct scatterlist *dst, struct scatterlist *src,
 287                        unsigned int nbytes)
 288 {
 289         struct crypto_aes_ctx *ctx = aes_ctx(crypto_blkcipher_ctx(desc->tfm));
 290         struct blkcipher_walk walk;
 291         int err;
 292
 293         blkcipher_walk_init(&walk, dst, src, nbytes);
 294         err = blkcipher_walk_virt(desc, &walk);
 295         desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
 296
 297         kernel_fpu_begin();
 298         while ((nbytes = walk.nbytes)) {
 299                 aesni_cbc_dec(ctx, walk.dst.virt.addr, walk.src.virt.addr,
 300                               nbytes & AES_BLOCK_MASK, walk.iv);
 301                 nbytes &= AES_BLOCK_SIZE - 1;
 302                 err = blkcipher_walk_done(desc, &walk, nbytes);
 303         }
 304         kernel_fpu_end();
 305
 306         return err;
 307 }
 308
 309 static struct crypto_alg blk_cbc_alg = {
 310         .cra_name               = "__cbc-aes-aesni",
 311         .cra_driver_name        = "__driver-cbc-aes-aesni",
 312         .cra_priority           = 0,
 313         .cra_flags              = CRYPTO_ALG_TYPE_BLKCIPHER,
 314         .cra_blocksize          = AES_BLOCK_SIZE,
 315         .cra_ctxsize            = sizeof(struct crypto_aes_ctx)+AESNI_ALIGN-1,
 316         .cra_alignmask          = 0,
 317         .cra_type               = &crypto_blkcipher_type,
 318         .cra_module             = THIS_MODULE,
 319         .cra_list               = LIST_HEAD_INIT(blk_cbc_alg.cra_list),
 320         .cra_u = {
 321                 .blkcipher = {
 322                         .min_keysize    = AES_MIN_KEY_SIZE,
 323                         .max_keysize    = AES_MAX_KEY_SIZE,
 324                         .setkey         = aes_set_key,
 325                         .encrypt        = cbc_encrypt,
 326                         .decrypt        = cbc_decrypt,
 327                 },
 328         },
 329 };
 330
 331 static int ablk_set_key(struct crypto_ablkcipher *tfm, const u8 *key,
 332                         unsigned int key_len)
 333 {
 334         struct async_aes_ctx *ctx = crypto_ablkcipher_ctx(tfm);
 335         struct crypto_ablkcipher *child = &ctx->cryptd_tfm->base;
 336         int err;
 337
 338         crypto_ablkcipher_clear_flags(child, CRYPTO_TFM_REQ_MASK);
 339         crypto_ablkcipher_set_flags(child, crypto_ablkcipher_get_flags(tfm)
 340                                     & CRYPTO_TFM_REQ_MASK);
 341         err = crypto_ablkcipher_setkey(child, key, key_len);
 342         crypto_ablkcipher_set_flags(tfm, crypto_ablkcipher_get_flags(child)
 343                                     & CRYPTO_TFM_RES_MASK);
 344         return err;
 345 }
 346
 347 static int ablk_encrypt(struct ablkcipher_request *req)
 348 {
 349         struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req);
 350         struct async_aes_ctx *ctx = crypto_ablkcipher_ctx(tfm);
 351
 352         if (kernel_fpu_using()) {
 353                 struct ablkcipher_request *cryptd_req =
 354                         ablkcipher_request_ctx(req);
 355                 memcpy(cryptd_req, req, sizeof(*req));
 356                 ablkcipher_request_set_tfm(cryptd_req, &ctx->cryptd_tfm->base);
 357                 return crypto_ablkcipher_encrypt(cryptd_req);
 358         } else {
 359                 struct blkcipher_desc desc;
 360                 desc.tfm = cryptd_ablkcipher_child(ctx->cryptd_tfm);
 361                 desc.info = req->info;
 362                 desc.flags = 0;
 363                 return crypto_blkcipher_crt(desc.tfm)->encrypt(
 364                         &desc, req->dst, req->src, req->nbytes);
 365         }
 366 }
 367
 368 static int ablk_decrypt(struct ablkcipher_request *req)
 369 {
 370         struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req);
 371         struct async_aes_ctx *ctx = crypto_ablkcipher_ctx(tfm);
 372
 373         if (kernel_fpu_using()) {
 374                 struct ablkcipher_request *cryptd_req =
 375                         ablkcipher_request_ctx(req);
 376                 memcpy(cryptd_req, req, sizeof(*req));
 377                 ablkcipher_request_set_tfm(cryptd_req, &ctx->cryptd_tfm->base);
 378                 return crypto_ablkcipher_decrypt(cryptd_req);
 379         } else {
 380                 struct blkcipher_desc desc;
 381                 desc.tfm = cryptd_ablkcipher_child(ctx->cryptd_tfm);
 382                 desc.info = req->info;
 383                 desc.flags = 0;
 384                 return crypto_blkcipher_crt(desc.tfm)->decrypt(
 385                         &desc, req->dst, req->src, req->nbytes);
 386         }
 387 }
 388
 389 static void ablk_exit(struct crypto_tfm *tfm)
 390 {
 391         struct async_aes_ctx *ctx = crypto_tfm_ctx(tfm);
 392
 393         cryptd_free_ablkcipher(ctx->cryptd_tfm);
 394 }
 395
 396 static void ablk_init_common(struct crypto_tfm *tfm,
 397                              struct cryptd_ablkcipher *cryptd_tfm)
 398 {
 399         struct async_aes_ctx *ctx = crypto_tfm_ctx(tfm);
 400
 401         ctx->cryptd_tfm = cryptd_tfm;
 402         tfm->crt_ablkcipher.reqsize = sizeof(struct ablkcipher_request) +
 403                 crypto_ablkcipher_reqsize(&cryptd_tfm->base);
 404 }
 405
 406 static int ablk_ecb_init(struct crypto_tfm *tfm)
 407 {
 408         struct cryptd_ablkcipher *cryptd_tfm;
 409
 410         cryptd_tfm = cryptd_alloc_ablkcipher("__driver-ecb-aes-aesni", 0, 0);
 411         if (IS_ERR(cryptd_tfm))
 412                 return PTR_ERR(cryptd_tfm);
 413         ablk_init_common(tfm, cryptd_tfm);
 414         return 0;
 415 }
 416
 417 static struct crypto_alg ablk_ecb_alg = {
 418         .cra_name               = "ecb(aes)",
 419         .cra_driver_name        = "ecb-aes-aesni",
 420         .cra_priority           = 400,
 421         .cra_flags              = CRYPTO_ALG_TYPE_ABLKCIPHER|CRYPTO_ALG_ASYNC,
 422         .cra_blocksize          = AES_BLOCK_SIZE,
 423         .cra_ctxsize            = sizeof(struct async_aes_ctx),
 424         .cra_alignmask          = 0,
 425         .cra_type               = &crypto_ablkcipher_type,
 426         .cra_module             = THIS_MODULE,
 427         .cra_list               = LIST_HEAD_INIT(ablk_ecb_alg.cra_list),
 428         .cra_init               = ablk_ecb_init,
 429         .cra_exit               = ablk_exit,
 430         .cra_u = {
 431                 .ablkcipher = {
 432                         .min_keysize    = AES_MIN_KEY_SIZE,
 433                         .max_keysize    = AES_MAX_KEY_SIZE,
 434                         .setkey         = ablk_set_key,
 435                         .encrypt        = ablk_encrypt,
 436                         .decrypt        = ablk_decrypt,
 437                 },
 438         },
 439 };
 440
 441 static int ablk_cbc_init(struct crypto_tfm *tfm)
 442 {
 443         struct cryptd_ablkcipher *cryptd_tfm;
 444
 445         cryptd_tfm = cryptd_alloc_ablkcipher("__driver-cbc-aes-aesni", 0, 0);
 446         if (IS_ERR(cryptd_tfm))
 447                 return PTR_ERR(cryptd_tfm);
 448         ablk_init_common(tfm, cryptd_tfm);
 449         return 0;
 450 }
 451
 452 static struct crypto_alg ablk_cbc_alg = {
 453         .cra_name               = "cbc(aes)",
 454         .cra_driver_name        = "cbc-aes-aesni",
 455         .cra_priority           = 400,
 456         .cra_flags              = CRYPTO_ALG_TYPE_ABLKCIPHER|CRYPTO_ALG_ASYNC,
 457         .cra_blocksize          = AES_BLOCK_SIZE,
 458         .cra_ctxsize            = sizeof(struct async_aes_ctx),
 459         .cra_alignmask          = 0,
 460         .cra_type               = &crypto_ablkcipher_type,
 461         .cra_module             = THIS_MODULE,
 462         .cra_list               = LIST_HEAD_INIT(ablk_cbc_alg.cra_list),
 463         .cra_init               = ablk_cbc_init,
 464         .cra_exit               = ablk_exit,
 465         .cra_u = {
 466                 .ablkcipher = {
 467                         .min_keysize    = AES_MIN_KEY_SIZE,
 468                         .max_keysize    = AES_MAX_KEY_SIZE,
 469                         .ivsize         = AES_BLOCK_SIZE,
 470                         .setkey         = ablk_set_key,
 471                         .encrypt        = ablk_encrypt,
 472                         .decrypt        = ablk_decrypt,
 473                 },
 474         },
 475 };
 476
 477 #ifdef HAS_CTR
 478 static int ablk_ctr_init(struct crypto_tfm *tfm)
 479 {
 480         struct cryptd_ablkcipher *cryptd_tfm;
 481
 482         cryptd_tfm = cryptd_alloc_ablkcipher("fpu(ctr(__driver-aes-aesni))",
 483                                              0, 0);
 484         if (IS_ERR(cryptd_tfm))
 485                 return PTR_ERR(cryptd_tfm);
 486         ablk_init_common(tfm, cryptd_tfm);
 487         return 0;
 488 }
 489
 490 static struct crypto_alg ablk_ctr_alg = {
 491         .cra_name               = "ctr(aes)",
 492         .cra_driver_name        = "ctr-aes-aesni",
 493         .cra_priority           = 400,
 494         .cra_flags              = CRYPTO_ALG_TYPE_ABLKCIPHER|CRYPTO_ALG_ASYNC,
 495         .cra_blocksize          = 1,
 496         .cra_ctxsize            = sizeof(struct async_aes_ctx),
 497         .cra_alignmask          = 0,
 498         .cra_type               = &crypto_ablkcipher_type,
 499         .cra_module             = THIS_MODULE,
 500         .cra_list               = LIST_HEAD_INIT(ablk_ctr_alg.cra_list),
 501         .cra_init               = ablk_ctr_init,
 502         .cra_exit               = ablk_exit,
 503         .cra_u = {
 504                 .ablkcipher = {
 505                         .min_keysize    = AES_MIN_KEY_SIZE,
 506                         .max_keysize    = AES_MAX_KEY_SIZE,
 507                         .ivsize         = AES_BLOCK_SIZE,
 508                         .setkey         = ablk_set_key,
 509                         .encrypt        = ablk_encrypt,
 510                         .decrypt        = ablk_decrypt,
 511                         .geniv          = "chainiv",
 512                 },
 513         },
 514 };
 515 #endif
 516
 517 #ifdef HAS_LRW
 518 static int ablk_lrw_init(struct crypto_tfm *tfm)
 519 {
 520         struct cryptd_ablkcipher *cryptd_tfm;
 521
 522         cryptd_tfm = cryptd_alloc_ablkcipher("fpu(lrw(__driver-aes-aesni))",
 523                                              0, 0);
 524         if (IS_ERR(cryptd_tfm))
 525                 return PTR_ERR(cryptd_tfm);
 526         ablk_init_common(tfm, cryptd_tfm);
 527         return 0;
 528 }
 529
 530 static struct crypto_alg ablk_lrw_alg = {
 531         .cra_name               = "lrw(aes)",
 532         .cra_driver_name        = "lrw-aes-aesni",
 533         .cra_priority           = 400,
 534         .cra_flags              = CRYPTO_ALG_TYPE_ABLKCIPHER|CRYPTO_ALG_ASYNC,
 535         .cra_blocksize          = AES_BLOCK_SIZE,
 536         .cra_ctxsize            = sizeof(struct async_aes_ctx),
 537         .cra_alignmask          = 0,
 538         .cra_type               = &crypto_ablkcipher_type,
 539         .cra_module             = THIS_MODULE,
 540         .cra_list               = LIST_HEAD_INIT(ablk_lrw_alg.cra_list),
 541         .cra_init               = ablk_lrw_init,
 542         .cra_exit               = ablk_exit,
 543         .cra_u = {
 544                 .ablkcipher = {
 545                         .min_keysize    = AES_MIN_KEY_SIZE + AES_BLOCK_SIZE,
 546                         .max_keysize    = AES_MAX_KEY_SIZE + AES_BLOCK_SIZE,
 547                         .ivsize         = AES_BLOCK_SIZE,
 548                         .setkey         = ablk_set_key,
 549                         .encrypt        = ablk_encrypt,
 550                         .decrypt        = ablk_decrypt,
 551                 },
 552         },
 553 };
 554 #endif
 555
 556 #ifdef HAS_PCBC
 557 static int ablk_pcbc_init(struct crypto_tfm *tfm)
 558 {
 559         struct cryptd_ablkcipher *cryptd_tfm;
 560
 561         cryptd_tfm = cryptd_alloc_ablkcipher("fpu(pcbc(__driver-aes-aesni))",
 562                                              0, 0);
 563         if (IS_ERR(cryptd_tfm))
 564                 return PTR_ERR(cryptd_tfm);
 565         ablk_init_common(tfm, cryptd_tfm);
 566         return 0;
 567 }
 568
 569 static struct crypto_alg ablk_pcbc_alg = {
 570         .cra_name               = "pcbc(aes)",
 571         .cra_driver_name        = "pcbc-aes-aesni",
 572         .cra_priority           = 400,
 573         .cra_flags              = CRYPTO_ALG_TYPE_ABLKCIPHER|CRYPTO_ALG_ASYNC,
 574         .cra_blocksize          = AES_BLOCK_SIZE,
 575         .cra_ctxsize            = sizeof(struct async_aes_ctx),
 576         .cra_alignmask          = 0,
 577         .cra_type               = &crypto_ablkcipher_type,
 578         .cra_module             = THIS_MODULE,
 579         .cra_list               = LIST_HEAD_INIT(ablk_pcbc_alg.cra_list),
 580         .cra_init               = ablk_pcbc_init,
 581         .cra_exit               = ablk_exit,
 582         .cra_u = {
 583                 .ablkcipher = {
 584                         .min_keysize    = AES_MIN_KEY_SIZE,
 585                         .max_keysize    = AES_MAX_KEY_SIZE,
 586                         .ivsize         = AES_BLOCK_SIZE,
 587                         .setkey         = ablk_set_key,
 588                         .encrypt        = ablk_encrypt,
 589                         .decrypt        = ablk_decrypt,
 590                 },
 591         },
 592 };
 593 #endif
 594
 595 #ifdef HAS_XTS
 596 static int ablk_xts_init(struct crypto_tfm *tfm)
 597 {
 598         struct cryptd_ablkcipher *cryptd_tfm;
 599
 600         cryptd_tfm = cryptd_alloc_ablkcipher("fpu(xts(__driver-aes-aesni))",
 601                                              0, 0);
 602         if (IS_ERR(cryptd_tfm))
 603                 return PTR_ERR(cryptd_tfm);
 604         ablk_init_common(tfm, cryptd_tfm);
 605         return 0;
 606 }
 607
 608 static struct crypto_alg ablk_xts_alg = {
 609         .cra_name               = "xts(aes)",
 610         .cra_driver_name        = "xts-aes-aesni",
 611         .cra_priority           = 400,
 612         .cra_flags              = CRYPTO_ALG_TYPE_ABLKCIPHER|CRYPTO_ALG_ASYNC,
 613         .cra_blocksize          = AES_BLOCK_SIZE,
 614         .cra_ctxsize            = sizeof(struct async_aes_ctx),
 615         .cra_alignmask          = 0,
 616         .cra_type               = &crypto_ablkcipher_type,
 617         .cra_module             = THIS_MODULE,
 618         .cra_list               = LIST_HEAD_INIT(ablk_xts_alg.cra_list),
 619         .cra_init               = ablk_xts_init,
 620         .cra_exit               = ablk_exit,
 621         .cra_u = {
 622                 .ablkcipher = {
 623                         .min_keysize    = 2 * AES_MIN_KEY_SIZE,
 624                         .max_keysize    = 2 * AES_MAX_KEY_SIZE,
 625                         .ivsize         = AES_BLOCK_SIZE,
 626                         .setkey         = ablk_set_key,
 627                         .encrypt        = ablk_encrypt,
 628                         .decrypt        = ablk_decrypt,
 629                 },
 630         },
 631 };
 632 #endif
 633
 634 static int __init aesni_init(void)
 635 {
 636         int err;
 637
 638         if (!cpu_has_aes) {
 639                 printk(KERN_INFO "Intel AES-NI instructions are not detected.\n");
 640                 return -ENODEV;
 641         }
 642         if ((err = crypto_register_alg(&aesni_alg)))
 643                 goto aes_err;
 644         if ((err = crypto_register_alg(&__aesni_alg)))
 645                 goto __aes_err;
 646         if ((err = crypto_register_alg(&blk_ecb_alg)))
 647                 goto blk_ecb_err;
 648         if ((err = crypto_register_alg(&blk_cbc_alg)))
 649                 goto blk_cbc_err;
 650         if ((err = crypto_register_alg(&ablk_ecb_alg)))
 651                 goto ablk_ecb_err;
 652         if ((err = crypto_register_alg(&ablk_cbc_alg)))
 653                 goto ablk_cbc_err;
 654 #ifdef HAS_CTR
 655         if ((err = crypto_register_alg(&ablk_ctr_alg)))
 656                 goto ablk_ctr_err;
 657 #endif
 658 #ifdef HAS_LRW
 659         if ((err = crypto_register_alg(&ablk_lrw_alg)))
 660                 goto ablk_lrw_err;
 661 #endif
 662 #ifdef HAS_PCBC
 663         if ((err = crypto_register_alg(&ablk_pcbc_alg)))
 664                 goto ablk_pcbc_err;
 665 #endif
 666 #ifdef HAS_XTS
 667         if ((err = crypto_register_alg(&ablk_xts_alg)))
 668                 goto ablk_xts_err;
 669 #endif
 670
 671         return err;
 672
 673 #ifdef HAS_XTS
 674 ablk_xts_err:
 675 #endif
 676 #ifdef HAS_PCBC
 677         crypto_unregister_alg(&ablk_pcbc_alg);
 678 ablk_pcbc_err:
 679 #endif
 680 #ifdef HAS_LRW
 681         crypto_unregister_alg(&ablk_lrw_alg);
 682 ablk_lrw_err:
 683 #endif
 684 #ifdef HAS_CTR
 685         crypto_unregister_alg(&ablk_ctr_alg);
 686 ablk_ctr_err:
 687 #endif
 688         crypto_unregister_alg(&ablk_cbc_alg);
 689 ablk_cbc_err:
 690         crypto_unregister_alg(&ablk_ecb_alg);
 691 ablk_ecb_err:
 692         crypto_unregister_alg(&blk_cbc_alg);
 693 blk_cbc_err:
 694         crypto_unregister_alg(&blk_ecb_alg);
 695 blk_ecb_err:
 696         crypto_unregister_alg(&__aesni_alg);
 697 __aes_err:
 698         crypto_unregister_alg(&aesni_alg);
 699 aes_err:
 700         return err;
 701 }
 702
 703 static void __exit aesni_exit(void)
 704 {
 705 #ifdef HAS_XTS
 706         crypto_unregister_alg(&ablk_xts_alg);
 707 #endif
 708 #ifdef HAS_PCBC
 709         crypto_unregister_alg(&ablk_pcbc_alg);
 710 #endif
 711 #ifdef HAS_LRW
 712         crypto_unregister_alg(&ablk_lrw_alg);
 713 #endif
 714 #ifdef HAS_CTR
 715         crypto_unregister_alg(&ablk_ctr_alg);
 716 #endif
 717         crypto_unregister_alg(&ablk_cbc_alg);
 718         crypto_unregister_alg(&ablk_ecb_alg);
 719         crypto_unregister_alg(&blk_cbc_alg);
 720         crypto_unregister_alg(&blk_ecb_alg);
 721         crypto_unregister_alg(&__aesni_alg);
 722         crypto_unregister_alg(&aesni_alg);
 723 }
 724
 725 module_init(aesni_init);
 726 module_exit(aesni_exit);
 727
 728 MODULE_DESCRIPTION("Rijndael (AES) Cipher Algorithm, Intel AES-NI instructions optimized");
 729 MODULE_LICENSE("GPL");
 730 MODULE_ALIAS("aes");