linux/arch/x86/crypto/aesni-intel_glue.c
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   1// SPDX-License-Identifier: GPL-2.0-or-later
   2/*
   3 * Support for Intel AES-NI instructions. This file contains glue
   4 * code, the real AES implementation is in intel-aes_asm.S.
   5 *
   6 * Copyright (C) 2008, Intel Corp.
   7 *    Author: Huang Ying <ying.huang@intel.com>
   8 *
   9 * Added RFC4106 AES-GCM support for 128-bit keys under the AEAD
  10 * interface for 64-bit kernels.
  11 *    Authors: Adrian Hoban <adrian.hoban@intel.com>
  12 *             Gabriele Paoloni <gabriele.paoloni@intel.com>
  13 *             Tadeusz Struk (tadeusz.struk@intel.com)
  14 *             Aidan O'Mahony (aidan.o.mahony@intel.com)
  15 *    Copyright (c) 2010, Intel Corporation.
  16 */
  17
  18#include <linux/hardirq.h>
  19#include <linux/types.h>
  20#include <linux/module.h>
  21#include <linux/err.h>
  22#include <crypto/algapi.h>
  23#include <crypto/aes.h>
  24#include <crypto/ctr.h>
  25#include <crypto/b128ops.h>
  26#include <crypto/gcm.h>
  27#include <crypto/xts.h>
  28#include <asm/cpu_device_id.h>
  29#include <asm/simd.h>
  30#include <crypto/scatterwalk.h>
  31#include <crypto/internal/aead.h>
  32#include <crypto/internal/simd.h>
  33#include <crypto/internal/skcipher.h>
  34#include <linux/jump_label.h>
  35#include <linux/workqueue.h>
  36#include <linux/spinlock.h>
  37#include <linux/static_call.h>
  38
  39
  40#define AESNI_ALIGN     16
  41#define AESNI_ALIGN_ATTR __attribute__ ((__aligned__(AESNI_ALIGN)))
  42#define AES_BLOCK_MASK  (~(AES_BLOCK_SIZE - 1))
  43#define RFC4106_HASH_SUBKEY_SIZE 16
  44#define AESNI_ALIGN_EXTRA ((AESNI_ALIGN - 1) & ~(CRYPTO_MINALIGN - 1))
  45#define CRYPTO_AES_CTX_SIZE (sizeof(struct crypto_aes_ctx) + AESNI_ALIGN_EXTRA)
  46#define XTS_AES_CTX_SIZE (sizeof(struct aesni_xts_ctx) + AESNI_ALIGN_EXTRA)
  47
  48/* This data is stored at the end of the crypto_tfm struct.
  49 * It's a type of per "session" data storage location.
  50 * This needs to be 16 byte aligned.
  51 */
  52struct aesni_rfc4106_gcm_ctx {
  53        u8 hash_subkey[16] AESNI_ALIGN_ATTR;
  54        struct crypto_aes_ctx aes_key_expanded AESNI_ALIGN_ATTR;
  55        u8 nonce[4];
  56};
  57
  58struct generic_gcmaes_ctx {
  59        u8 hash_subkey[16] AESNI_ALIGN_ATTR;
  60        struct crypto_aes_ctx aes_key_expanded AESNI_ALIGN_ATTR;
  61};
  62
  63struct aesni_xts_ctx {
  64        u8 raw_tweak_ctx[sizeof(struct crypto_aes_ctx)] AESNI_ALIGN_ATTR;
  65        u8 raw_crypt_ctx[sizeof(struct crypto_aes_ctx)] AESNI_ALIGN_ATTR;
  66};
  67
  68#define GCM_BLOCK_LEN 16
  69
  70struct gcm_context_data {
  71        /* init, update and finalize context data */
  72        u8 aad_hash[GCM_BLOCK_LEN];
  73        u64 aad_length;
  74        u64 in_length;
  75        u8 partial_block_enc_key[GCM_BLOCK_LEN];
  76        u8 orig_IV[GCM_BLOCK_LEN];
  77        u8 current_counter[GCM_BLOCK_LEN];
  78        u64 partial_block_len;
  79        u64 unused;
  80        u8 hash_keys[GCM_BLOCK_LEN * 16];
  81};
  82
  83asmlinkage int aesni_set_key(struct crypto_aes_ctx *ctx, const u8 *in_key,
  84                             unsigned int key_len);
  85asmlinkage void aesni_enc(const void *ctx, u8 *out, const u8 *in);
  86asmlinkage void aesni_dec(const void *ctx, u8 *out, const u8 *in);
  87asmlinkage void aesni_ecb_enc(struct crypto_aes_ctx *ctx, u8 *out,
  88                              const u8 *in, unsigned int len);
  89asmlinkage void aesni_ecb_dec(struct crypto_aes_ctx *ctx, u8 *out,
  90                              const u8 *in, unsigned int len);
  91asmlinkage void aesni_cbc_enc(struct crypto_aes_ctx *ctx, u8 *out,
  92                              const u8 *in, unsigned int len, u8 *iv);
  93asmlinkage void aesni_cbc_dec(struct crypto_aes_ctx *ctx, u8 *out,
  94                              const u8 *in, unsigned int len, u8 *iv);
  95asmlinkage void aesni_cts_cbc_enc(struct crypto_aes_ctx *ctx, u8 *out,
  96                                  const u8 *in, unsigned int len, u8 *iv);
  97asmlinkage void aesni_cts_cbc_dec(struct crypto_aes_ctx *ctx, u8 *out,
  98                                  const u8 *in, unsigned int len, u8 *iv);
  99
 100#define AVX_GEN2_OPTSIZE 640
 101#define AVX_GEN4_OPTSIZE 4096
 102
 103asmlinkage void aesni_xts_encrypt(const struct crypto_aes_ctx *ctx, u8 *out,
 104                                  const u8 *in, unsigned int len, u8 *iv);
 105
 106asmlinkage void aesni_xts_decrypt(const struct crypto_aes_ctx *ctx, u8 *out,
 107                                  const u8 *in, unsigned int len, u8 *iv);
 108
 109#ifdef CONFIG_X86_64
 110
 111asmlinkage void aesni_ctr_enc(struct crypto_aes_ctx *ctx, u8 *out,
 112                              const u8 *in, unsigned int len, u8 *iv);
 113DEFINE_STATIC_CALL(aesni_ctr_enc_tfm, aesni_ctr_enc);
 114
 115/* Scatter / Gather routines, with args similar to above */
 116asmlinkage void aesni_gcm_init(void *ctx,
 117                               struct gcm_context_data *gdata,
 118                               u8 *iv,
 119                               u8 *hash_subkey, const u8 *aad,
 120                               unsigned long aad_len);
 121asmlinkage void aesni_gcm_enc_update(void *ctx,
 122                                     struct gcm_context_data *gdata, u8 *out,
 123                                     const u8 *in, unsigned long plaintext_len);
 124asmlinkage void aesni_gcm_dec_update(void *ctx,
 125                                     struct gcm_context_data *gdata, u8 *out,
 126                                     const u8 *in,
 127                                     unsigned long ciphertext_len);
 128asmlinkage void aesni_gcm_finalize(void *ctx,
 129                                   struct gcm_context_data *gdata,
 130                                   u8 *auth_tag, unsigned long auth_tag_len);
 131
 132asmlinkage void aes_ctr_enc_128_avx_by8(const u8 *in, u8 *iv,
 133                void *keys, u8 *out, unsigned int num_bytes);
 134asmlinkage void aes_ctr_enc_192_avx_by8(const u8 *in, u8 *iv,
 135                void *keys, u8 *out, unsigned int num_bytes);
 136asmlinkage void aes_ctr_enc_256_avx_by8(const u8 *in, u8 *iv,
 137                void *keys, u8 *out, unsigned int num_bytes);
 138/*
 139 * asmlinkage void aesni_gcm_init_avx_gen2()
 140 * gcm_data *my_ctx_data, context data
 141 * u8 *hash_subkey,  the Hash sub key input. Data starts on a 16-byte boundary.
 142 */
 143asmlinkage void aesni_gcm_init_avx_gen2(void *my_ctx_data,
 144                                        struct gcm_context_data *gdata,
 145                                        u8 *iv,
 146                                        u8 *hash_subkey,
 147                                        const u8 *aad,
 148                                        unsigned long aad_len);
 149
 150asmlinkage void aesni_gcm_enc_update_avx_gen2(void *ctx,
 151                                     struct gcm_context_data *gdata, u8 *out,
 152                                     const u8 *in, unsigned long plaintext_len);
 153asmlinkage void aesni_gcm_dec_update_avx_gen2(void *ctx,
 154                                     struct gcm_context_data *gdata, u8 *out,
 155                                     const u8 *in,
 156                                     unsigned long ciphertext_len);
 157asmlinkage void aesni_gcm_finalize_avx_gen2(void *ctx,
 158                                   struct gcm_context_data *gdata,
 159                                   u8 *auth_tag, unsigned long auth_tag_len);
 160
 161/*
 162 * asmlinkage void aesni_gcm_init_avx_gen4()
 163 * gcm_data *my_ctx_data, context data
 164 * u8 *hash_subkey,  the Hash sub key input. Data starts on a 16-byte boundary.
 165 */
 166asmlinkage void aesni_gcm_init_avx_gen4(void *my_ctx_data,
 167                                        struct gcm_context_data *gdata,
 168                                        u8 *iv,
 169                                        u8 *hash_subkey,
 170                                        const u8 *aad,
 171                                        unsigned long aad_len);
 172
 173asmlinkage void aesni_gcm_enc_update_avx_gen4(void *ctx,
 174                                     struct gcm_context_data *gdata, u8 *out,
 175                                     const u8 *in, unsigned long plaintext_len);
 176asmlinkage void aesni_gcm_dec_update_avx_gen4(void *ctx,
 177                                     struct gcm_context_data *gdata, u8 *out,
 178                                     const u8 *in,
 179                                     unsigned long ciphertext_len);
 180asmlinkage void aesni_gcm_finalize_avx_gen4(void *ctx,
 181                                   struct gcm_context_data *gdata,
 182                                   u8 *auth_tag, unsigned long auth_tag_len);
 183
 184static __ro_after_init DEFINE_STATIC_KEY_FALSE(gcm_use_avx);
 185static __ro_after_init DEFINE_STATIC_KEY_FALSE(gcm_use_avx2);
 186
 187static inline struct
 188aesni_rfc4106_gcm_ctx *aesni_rfc4106_gcm_ctx_get(struct crypto_aead *tfm)
 189{
 190        unsigned long align = AESNI_ALIGN;
 191
 192        if (align <= crypto_tfm_ctx_alignment())
 193                align = 1;
 194        return PTR_ALIGN(crypto_aead_ctx(tfm), align);
 195}
 196
 197static inline struct
 198generic_gcmaes_ctx *generic_gcmaes_ctx_get(struct crypto_aead *tfm)
 199{
 200        unsigned long align = AESNI_ALIGN;
 201
 202        if (align <= crypto_tfm_ctx_alignment())
 203                align = 1;
 204        return PTR_ALIGN(crypto_aead_ctx(tfm), align);
 205}
 206#endif
 207
 208static inline struct crypto_aes_ctx *aes_ctx(void *raw_ctx)
 209{
 210        unsigned long addr = (unsigned long)raw_ctx;
 211        unsigned long align = AESNI_ALIGN;
 212
 213        if (align <= crypto_tfm_ctx_alignment())
 214                align = 1;
 215        return (struct crypto_aes_ctx *)ALIGN(addr, align);
 216}
 217
 218static int aes_set_key_common(struct crypto_tfm *tfm, void *raw_ctx,
 219                              const u8 *in_key, unsigned int key_len)
 220{
 221        struct crypto_aes_ctx *ctx = aes_ctx(raw_ctx);
 222        int err;
 223
 224        if (key_len != AES_KEYSIZE_128 && key_len != AES_KEYSIZE_192 &&
 225            key_len != AES_KEYSIZE_256)
 226                return -EINVAL;
 227
 228        if (!crypto_simd_usable())
 229                err = aes_expandkey(ctx, in_key, key_len);
 230        else {
 231                kernel_fpu_begin();
 232                err = aesni_set_key(ctx, in_key, key_len);
 233                kernel_fpu_end();
 234        }
 235
 236        return err;
 237}
 238
 239static int aes_set_key(struct crypto_tfm *tfm, const u8 *in_key,
 240                       unsigned int key_len)
 241{
 242        return aes_set_key_common(tfm, crypto_tfm_ctx(tfm), in_key, key_len);
 243}
 244
 245static void aesni_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
 246{
 247        struct crypto_aes_ctx *ctx = aes_ctx(crypto_tfm_ctx(tfm));
 248
 249        if (!crypto_simd_usable()) {
 250                aes_encrypt(ctx, dst, src);
 251        } else {
 252                kernel_fpu_begin();
 253                aesni_enc(ctx, dst, src);
 254                kernel_fpu_end();
 255        }
 256}
 257
 258static void aesni_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
 259{
 260        struct crypto_aes_ctx *ctx = aes_ctx(crypto_tfm_ctx(tfm));
 261
 262        if (!crypto_simd_usable()) {
 263                aes_decrypt(ctx, dst, src);
 264        } else {
 265                kernel_fpu_begin();
 266                aesni_dec(ctx, dst, src);
 267                kernel_fpu_end();
 268        }
 269}
 270
 271static int aesni_skcipher_setkey(struct crypto_skcipher *tfm, const u8 *key,
 272                                 unsigned int len)
 273{
 274        return aes_set_key_common(crypto_skcipher_tfm(tfm),
 275                                  crypto_skcipher_ctx(tfm), key, len);
 276}
 277
 278static int ecb_encrypt(struct skcipher_request *req)
 279{
 280        struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
 281        struct crypto_aes_ctx *ctx = aes_ctx(crypto_skcipher_ctx(tfm));
 282        struct skcipher_walk walk;
 283        unsigned int nbytes;
 284        int err;
 285
 286        err = skcipher_walk_virt(&walk, req, false);
 287
 288        while ((nbytes = walk.nbytes)) {
 289                kernel_fpu_begin();
 290                aesni_ecb_enc(ctx, walk.dst.virt.addr, walk.src.virt.addr,
 291                              nbytes & AES_BLOCK_MASK);
 292                kernel_fpu_end();
 293                nbytes &= AES_BLOCK_SIZE - 1;
 294                err = skcipher_walk_done(&walk, nbytes);
 295        }
 296
 297        return err;
 298}
 299
 300static int ecb_decrypt(struct skcipher_request *req)
 301{
 302        struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
 303        struct crypto_aes_ctx *ctx = aes_ctx(crypto_skcipher_ctx(tfm));
 304        struct skcipher_walk walk;
 305        unsigned int nbytes;
 306        int err;
 307
 308        err = skcipher_walk_virt(&walk, req, false);
 309
 310        while ((nbytes = walk.nbytes)) {
 311                kernel_fpu_begin();
 312                aesni_ecb_dec(ctx, walk.dst.virt.addr, walk.src.virt.addr,
 313                              nbytes & AES_BLOCK_MASK);
 314                kernel_fpu_end();
 315                nbytes &= AES_BLOCK_SIZE - 1;
 316                err = skcipher_walk_done(&walk, nbytes);
 317        }
 318
 319        return err;
 320}
 321
 322static int cbc_encrypt(struct skcipher_request *req)
 323{
 324        struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
 325        struct crypto_aes_ctx *ctx = aes_ctx(crypto_skcipher_ctx(tfm));
 326        struct skcipher_walk walk;
 327        unsigned int nbytes;
 328        int err;
 329
 330        err = skcipher_walk_virt(&walk, req, false);
 331
 332        while ((nbytes = walk.nbytes)) {
 333                kernel_fpu_begin();
 334                aesni_cbc_enc(ctx, walk.dst.virt.addr, walk.src.virt.addr,
 335                              nbytes & AES_BLOCK_MASK, walk.iv);
 336                kernel_fpu_end();
 337                nbytes &= AES_BLOCK_SIZE - 1;
 338                err = skcipher_walk_done(&walk, nbytes);
 339        }
 340
 341        return err;
 342}
 343
 344static int cbc_decrypt(struct skcipher_request *req)
 345{
 346        struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
 347        struct crypto_aes_ctx *ctx = aes_ctx(crypto_skcipher_ctx(tfm));
 348        struct skcipher_walk walk;
 349        unsigned int nbytes;
 350        int err;
 351
 352        err = skcipher_walk_virt(&walk, req, false);
 353
 354        while ((nbytes = walk.nbytes)) {
 355                kernel_fpu_begin();
 356                aesni_cbc_dec(ctx, walk.dst.virt.addr, walk.src.virt.addr,
 357                              nbytes & AES_BLOCK_MASK, walk.iv);
 358                kernel_fpu_end();
 359                nbytes &= AES_BLOCK_SIZE - 1;
 360                err = skcipher_walk_done(&walk, nbytes);
 361        }
 362
 363        return err;
 364}
 365
 366static int cts_cbc_encrypt(struct skcipher_request *req)
 367{
 368        struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
 369        struct crypto_aes_ctx *ctx = aes_ctx(crypto_skcipher_ctx(tfm));
 370        int cbc_blocks = DIV_ROUND_UP(req->cryptlen, AES_BLOCK_SIZE) - 2;
 371        struct scatterlist *src = req->src, *dst = req->dst;
 372        struct scatterlist sg_src[2], sg_dst[2];
 373        struct skcipher_request subreq;
 374        struct skcipher_walk walk;
 375        int err;
 376
 377        skcipher_request_set_tfm(&subreq, tfm);
 378        skcipher_request_set_callback(&subreq, skcipher_request_flags(req),
 379                                      NULL, NULL);
 380
 381        if (req->cryptlen <= AES_BLOCK_SIZE) {
 382                if (req->cryptlen < AES_BLOCK_SIZE)
 383                        return -EINVAL;
 384                cbc_blocks = 1;
 385        }
 386
 387        if (cbc_blocks > 0) {
 388                skcipher_request_set_crypt(&subreq, req->src, req->dst,
 389                                           cbc_blocks * AES_BLOCK_SIZE,
 390                                           req->iv);
 391
 392                err = cbc_encrypt(&subreq);
 393                if (err)
 394                        return err;
 395
 396                if (req->cryptlen == AES_BLOCK_SIZE)
 397                        return 0;
 398
 399                dst = src = scatterwalk_ffwd(sg_src, req->src, subreq.cryptlen);
 400                if (req->dst != req->src)
 401                        dst = scatterwalk_ffwd(sg_dst, req->dst,
 402                                               subreq.cryptlen);
 403        }
 404
 405        /* handle ciphertext stealing */
 406        skcipher_request_set_crypt(&subreq, src, dst,
 407                                   req->cryptlen - cbc_blocks * AES_BLOCK_SIZE,
 408                                   req->iv);
 409
 410        err = skcipher_walk_virt(&walk, &subreq, false);
 411        if (err)
 412                return err;
 413
 414        kernel_fpu_begin();
 415        aesni_cts_cbc_enc(ctx, walk.dst.virt.addr, walk.src.virt.addr,
 416                          walk.nbytes, walk.iv);
 417        kernel_fpu_end();
 418
 419        return skcipher_walk_done(&walk, 0);
 420}
 421
 422static int cts_cbc_decrypt(struct skcipher_request *req)
 423{
 424        struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
 425        struct crypto_aes_ctx *ctx = aes_ctx(crypto_skcipher_ctx(tfm));
 426        int cbc_blocks = DIV_ROUND_UP(req->cryptlen, AES_BLOCK_SIZE) - 2;
 427        struct scatterlist *src = req->src, *dst = req->dst;
 428        struct scatterlist sg_src[2], sg_dst[2];
 429        struct skcipher_request subreq;
 430        struct skcipher_walk walk;
 431        int err;
 432
 433        skcipher_request_set_tfm(&subreq, tfm);
 434        skcipher_request_set_callback(&subreq, skcipher_request_flags(req),
 435                                      NULL, NULL);
 436
 437        if (req->cryptlen <= AES_BLOCK_SIZE) {
 438                if (req->cryptlen < AES_BLOCK_SIZE)
 439                        return -EINVAL;
 440                cbc_blocks = 1;
 441        }
 442
 443        if (cbc_blocks > 0) {
 444                skcipher_request_set_crypt(&subreq, req->src, req->dst,
 445                                           cbc_blocks * AES_BLOCK_SIZE,
 446                                           req->iv);
 447
 448                err = cbc_decrypt(&subreq);
 449                if (err)
 450                        return err;
 451
 452                if (req->cryptlen == AES_BLOCK_SIZE)
 453                        return 0;
 454
 455                dst = src = scatterwalk_ffwd(sg_src, req->src, subreq.cryptlen);
 456                if (req->dst != req->src)
 457                        dst = scatterwalk_ffwd(sg_dst, req->dst,
 458                                               subreq.cryptlen);
 459        }
 460
 461        /* handle ciphertext stealing */
 462        skcipher_request_set_crypt(&subreq, src, dst,
 463                                   req->cryptlen - cbc_blocks * AES_BLOCK_SIZE,
 464                                   req->iv);
 465
 466        err = skcipher_walk_virt(&walk, &subreq, false);
 467        if (err)
 468                return err;
 469
 470        kernel_fpu_begin();
 471        aesni_cts_cbc_dec(ctx, walk.dst.virt.addr, walk.src.virt.addr,
 472                          walk.nbytes, walk.iv);
 473        kernel_fpu_end();
 474
 475        return skcipher_walk_done(&walk, 0);
 476}
 477
 478#ifdef CONFIG_X86_64
 479static void aesni_ctr_enc_avx_tfm(struct crypto_aes_ctx *ctx, u8 *out,
 480                              const u8 *in, unsigned int len, u8 *iv)
 481{
 482        /*
 483         * based on key length, override with the by8 version
 484         * of ctr mode encryption/decryption for improved performance
 485         * aes_set_key_common() ensures that key length is one of
 486         * {128,192,256}
 487         */
 488        if (ctx->key_length == AES_KEYSIZE_128)
 489                aes_ctr_enc_128_avx_by8(in, iv, (void *)ctx, out, len);
 490        else if (ctx->key_length == AES_KEYSIZE_192)
 491                aes_ctr_enc_192_avx_by8(in, iv, (void *)ctx, out, len);
 492        else
 493                aes_ctr_enc_256_avx_by8(in, iv, (void *)ctx, out, len);
 494}
 495
 496static int ctr_crypt(struct skcipher_request *req)
 497{
 498        struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
 499        struct crypto_aes_ctx *ctx = aes_ctx(crypto_skcipher_ctx(tfm));
 500        u8 keystream[AES_BLOCK_SIZE];
 501        struct skcipher_walk walk;
 502        unsigned int nbytes;
 503        int err;
 504
 505        err = skcipher_walk_virt(&walk, req, false);
 506
 507        while ((nbytes = walk.nbytes) > 0) {
 508                kernel_fpu_begin();
 509                if (nbytes & AES_BLOCK_MASK)
 510                        static_call(aesni_ctr_enc_tfm)(ctx, walk.dst.virt.addr,
 511                                                       walk.src.virt.addr,
 512                                                       nbytes & AES_BLOCK_MASK,
 513                                                       walk.iv);
 514                nbytes &= ~AES_BLOCK_MASK;
 515
 516                if (walk.nbytes == walk.total && nbytes > 0) {
 517                        aesni_enc(ctx, keystream, walk.iv);
 518                        crypto_xor_cpy(walk.dst.virt.addr + walk.nbytes - nbytes,
 519                                       walk.src.virt.addr + walk.nbytes - nbytes,
 520                                       keystream, nbytes);
 521                        crypto_inc(walk.iv, AES_BLOCK_SIZE);
 522                        nbytes = 0;
 523                }
 524                kernel_fpu_end();
 525                err = skcipher_walk_done(&walk, nbytes);
 526        }
 527        return err;
 528}
 529
 530static int
 531rfc4106_set_hash_subkey(u8 *hash_subkey, const u8 *key, unsigned int key_len)
 532{
 533        struct crypto_aes_ctx ctx;
 534        int ret;
 535
 536        ret = aes_expandkey(&ctx, key, key_len);
 537        if (ret)
 538                return ret;
 539
 540        /* Clear the data in the hash sub key container to zero.*/
 541        /* We want to cipher all zeros to create the hash sub key. */
 542        memset(hash_subkey, 0, RFC4106_HASH_SUBKEY_SIZE);
 543
 544        aes_encrypt(&ctx, hash_subkey, hash_subkey);
 545
 546        memzero_explicit(&ctx, sizeof(ctx));
 547        return 0;
 548}
 549
 550static int common_rfc4106_set_key(struct crypto_aead *aead, const u8 *key,
 551                                  unsigned int key_len)
 552{
 553        struct aesni_rfc4106_gcm_ctx *ctx = aesni_rfc4106_gcm_ctx_get(aead);
 554
 555        if (key_len < 4)
 556                return -EINVAL;
 557
 558        /*Account for 4 byte nonce at the end.*/
 559        key_len -= 4;
 560
 561        memcpy(ctx->nonce, key + key_len, sizeof(ctx->nonce));
 562
 563        return aes_set_key_common(crypto_aead_tfm(aead),
 564                                  &ctx->aes_key_expanded, key, key_len) ?:
 565               rfc4106_set_hash_subkey(ctx->hash_subkey, key, key_len);
 566}
 567
 568/* This is the Integrity Check Value (aka the authentication tag) length and can
 569 * be 8, 12 or 16 bytes long. */
 570static int common_rfc4106_set_authsize(struct crypto_aead *aead,
 571                                       unsigned int authsize)
 572{
 573        switch (authsize) {
 574        case 8:
 575        case 12:
 576        case 16:
 577                break;
 578        default:
 579                return -EINVAL;
 580        }
 581
 582        return 0;
 583}
 584
 585static int generic_gcmaes_set_authsize(struct crypto_aead *tfm,
 586                                       unsigned int authsize)
 587{
 588        switch (authsize) {
 589        case 4:
 590        case 8:
 591        case 12:
 592        case 13:
 593        case 14:
 594        case 15:
 595        case 16:
 596                break;
 597        default:
 598                return -EINVAL;
 599        }
 600
 601        return 0;
 602}
 603
 604static int gcmaes_crypt_by_sg(bool enc, struct aead_request *req,
 605                              unsigned int assoclen, u8 *hash_subkey,
 606                              u8 *iv, void *aes_ctx, u8 *auth_tag,
 607                              unsigned long auth_tag_len)
 608{
 609        u8 databuf[sizeof(struct gcm_context_data) + (AESNI_ALIGN - 8)] __aligned(8);
 610        struct gcm_context_data *data = PTR_ALIGN((void *)databuf, AESNI_ALIGN);
 611        unsigned long left = req->cryptlen;
 612        struct scatter_walk assoc_sg_walk;
 613        struct skcipher_walk walk;
 614        bool do_avx, do_avx2;
 615        u8 *assocmem = NULL;
 616        u8 *assoc;
 617        int err;
 618
 619        if (!enc)
 620                left -= auth_tag_len;
 621
 622        do_avx = (left >= AVX_GEN2_OPTSIZE);
 623        do_avx2 = (left >= AVX_GEN4_OPTSIZE);
 624
 625        /* Linearize assoc, if not already linear */
 626        if (req->src->length >= assoclen && req->src->length) {
 627                scatterwalk_start(&assoc_sg_walk, req->src);
 628                assoc = scatterwalk_map(&assoc_sg_walk);
 629        } else {
 630                gfp_t flags = (req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP) ?
 631                              GFP_KERNEL : GFP_ATOMIC;
 632
 633                /* assoc can be any length, so must be on heap */
 634                assocmem = kmalloc(assoclen, flags);
 635                if (unlikely(!assocmem))
 636                        return -ENOMEM;
 637                assoc = assocmem;
 638
 639                scatterwalk_map_and_copy(assoc, req->src, 0, assoclen, 0);
 640        }
 641
 642        kernel_fpu_begin();
 643        if (static_branch_likely(&gcm_use_avx2) && do_avx2)
 644                aesni_gcm_init_avx_gen4(aes_ctx, data, iv, hash_subkey, assoc,
 645                                        assoclen);
 646        else if (static_branch_likely(&gcm_use_avx) && do_avx)
 647                aesni_gcm_init_avx_gen2(aes_ctx, data, iv, hash_subkey, assoc,
 648                                        assoclen);
 649        else
 650                aesni_gcm_init(aes_ctx, data, iv, hash_subkey, assoc, assoclen);
 651        kernel_fpu_end();
 652
 653        if (!assocmem)
 654                scatterwalk_unmap(assoc);
 655        else
 656                kfree(assocmem);
 657
 658        err = enc ? skcipher_walk_aead_encrypt(&walk, req, false)
 659                  : skcipher_walk_aead_decrypt(&walk, req, false);
 660
 661        while (walk.nbytes > 0) {
 662                kernel_fpu_begin();
 663                if (static_branch_likely(&gcm_use_avx2) && do_avx2) {
 664                        if (enc)
 665                                aesni_gcm_enc_update_avx_gen4(aes_ctx, data,
 666                                                              walk.dst.virt.addr,
 667                                                              walk.src.virt.addr,
 668                                                              walk.nbytes);
 669                        else
 670                                aesni_gcm_dec_update_avx_gen4(aes_ctx, data,
 671                                                              walk.dst.virt.addr,
 672                                                              walk.src.virt.addr,
 673                                                              walk.nbytes);
 674                } else if (static_branch_likely(&gcm_use_avx) && do_avx) {
 675                        if (enc)
 676                                aesni_gcm_enc_update_avx_gen2(aes_ctx, data,
 677                                                              walk.dst.virt.addr,
 678                                                              walk.src.virt.addr,
 679                                                              walk.nbytes);
 680                        else
 681                                aesni_gcm_dec_update_avx_gen2(aes_ctx, data,
 682                                                              walk.dst.virt.addr,
 683                                                              walk.src.virt.addr,
 684                                                              walk.nbytes);
 685                } else if (enc) {
 686                        aesni_gcm_enc_update(aes_ctx, data, walk.dst.virt.addr,
 687                                             walk.src.virt.addr, walk.nbytes);
 688                } else {
 689                        aesni_gcm_dec_update(aes_ctx, data, walk.dst.virt.addr,
 690                                             walk.src.virt.addr, walk.nbytes);
 691                }
 692                kernel_fpu_end();
 693
 694                err = skcipher_walk_done(&walk, 0);
 695        }
 696
 697        if (err)
 698                return err;
 699
 700        kernel_fpu_begin();
 701        if (static_branch_likely(&gcm_use_avx2) && do_avx2)
 702                aesni_gcm_finalize_avx_gen4(aes_ctx, data, auth_tag,
 703                                            auth_tag_len);
 704        else if (static_branch_likely(&gcm_use_avx) && do_avx)
 705                aesni_gcm_finalize_avx_gen2(aes_ctx, data, auth_tag,
 706                                            auth_tag_len);
 707        else
 708                aesni_gcm_finalize(aes_ctx, data, auth_tag, auth_tag_len);
 709        kernel_fpu_end();
 710
 711        return 0;
 712}
 713
 714static int gcmaes_encrypt(struct aead_request *req, unsigned int assoclen,
 715                          u8 *hash_subkey, u8 *iv, void *aes_ctx)
 716{
 717        struct crypto_aead *tfm = crypto_aead_reqtfm(req);
 718        unsigned long auth_tag_len = crypto_aead_authsize(tfm);
 719        u8 auth_tag[16];
 720        int err;
 721
 722        err = gcmaes_crypt_by_sg(true, req, assoclen, hash_subkey, iv, aes_ctx,
 723                                 auth_tag, auth_tag_len);
 724        if (err)
 725                return err;
 726
 727        scatterwalk_map_and_copy(auth_tag, req->dst,
 728                                 req->assoclen + req->cryptlen,
 729                                 auth_tag_len, 1);
 730        return 0;
 731}
 732
 733static int gcmaes_decrypt(struct aead_request *req, unsigned int assoclen,
 734                          u8 *hash_subkey, u8 *iv, void *aes_ctx)
 735{
 736        struct crypto_aead *tfm = crypto_aead_reqtfm(req);
 737        unsigned long auth_tag_len = crypto_aead_authsize(tfm);
 738        u8 auth_tag_msg[16];
 739        u8 auth_tag[16];
 740        int err;
 741
 742        err = gcmaes_crypt_by_sg(false, req, assoclen, hash_subkey, iv, aes_ctx,
 743                                 auth_tag, auth_tag_len);
 744        if (err)
 745                return err;
 746
 747        /* Copy out original auth_tag */
 748        scatterwalk_map_and_copy(auth_tag_msg, req->src,
 749                                 req->assoclen + req->cryptlen - auth_tag_len,
 750                                 auth_tag_len, 0);
 751
 752        /* Compare generated tag with passed in tag. */
 753        if (crypto_memneq(auth_tag_msg, auth_tag, auth_tag_len)) {
 754                memzero_explicit(auth_tag, sizeof(auth_tag));
 755                return -EBADMSG;
 756        }
 757        return 0;
 758}
 759
 760static int helper_rfc4106_encrypt(struct aead_request *req)
 761{
 762        struct crypto_aead *tfm = crypto_aead_reqtfm(req);
 763        struct aesni_rfc4106_gcm_ctx *ctx = aesni_rfc4106_gcm_ctx_get(tfm);
 764        void *aes_ctx = &(ctx->aes_key_expanded);
 765        u8 ivbuf[16 + (AESNI_ALIGN - 8)] __aligned(8);
 766        u8 *iv = PTR_ALIGN(&ivbuf[0], AESNI_ALIGN);
 767        unsigned int i;
 768        __be32 counter = cpu_to_be32(1);
 769
 770        /* Assuming we are supporting rfc4106 64-bit extended */
 771        /* sequence numbers We need to have the AAD length equal */
 772        /* to 16 or 20 bytes */
 773        if (unlikely(req->assoclen != 16 && req->assoclen != 20))
 774                return -EINVAL;
 775
 776        /* IV below built */
 777        for (i = 0; i < 4; i++)
 778                *(iv+i) = ctx->nonce[i];
 779        for (i = 0; i < 8; i++)
 780                *(iv+4+i) = req->iv[i];
 781        *((__be32 *)(iv+12)) = counter;
 782
 783        return gcmaes_encrypt(req, req->assoclen - 8, ctx->hash_subkey, iv,
 784                              aes_ctx);
 785}
 786
 787static int helper_rfc4106_decrypt(struct aead_request *req)
 788{
 789        __be32 counter = cpu_to_be32(1);
 790        struct crypto_aead *tfm = crypto_aead_reqtfm(req);
 791        struct aesni_rfc4106_gcm_ctx *ctx = aesni_rfc4106_gcm_ctx_get(tfm);
 792        void *aes_ctx = &(ctx->aes_key_expanded);
 793        u8 ivbuf[16 + (AESNI_ALIGN - 8)] __aligned(8);
 794        u8 *iv = PTR_ALIGN(&ivbuf[0], AESNI_ALIGN);
 795        unsigned int i;
 796
 797        if (unlikely(req->assoclen != 16 && req->assoclen != 20))
 798                return -EINVAL;
 799
 800        /* Assuming we are supporting rfc4106 64-bit extended */
 801        /* sequence numbers We need to have the AAD length */
 802        /* equal to 16 or 20 bytes */
 803
 804        /* IV below built */
 805        for (i = 0; i < 4; i++)
 806                *(iv+i) = ctx->nonce[i];
 807        for (i = 0; i < 8; i++)
 808                *(iv+4+i) = req->iv[i];
 809        *((__be32 *)(iv+12)) = counter;
 810
 811        return gcmaes_decrypt(req, req->assoclen - 8, ctx->hash_subkey, iv,
 812                              aes_ctx);
 813}
 814#endif
 815
 816static int xts_aesni_setkey(struct crypto_skcipher *tfm, const u8 *key,
 817                            unsigned int keylen)
 818{
 819        struct aesni_xts_ctx *ctx = crypto_skcipher_ctx(tfm);
 820        int err;
 821
 822        err = xts_verify_key(tfm, key, keylen);
 823        if (err)
 824                return err;
 825
 826        keylen /= 2;
 827
 828        /* first half of xts-key is for crypt */
 829        err = aes_set_key_common(crypto_skcipher_tfm(tfm), ctx->raw_crypt_ctx,
 830                                 key, keylen);
 831        if (err)
 832                return err;
 833
 834        /* second half of xts-key is for tweak */
 835        return aes_set_key_common(crypto_skcipher_tfm(tfm), ctx->raw_tweak_ctx,
 836                                  key + keylen, keylen);
 837}
 838
 839static int xts_crypt(struct skcipher_request *req, bool encrypt)
 840{
 841        struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
 842        struct aesni_xts_ctx *ctx = crypto_skcipher_ctx(tfm);
 843        int tail = req->cryptlen % AES_BLOCK_SIZE;
 844        struct skcipher_request subreq;
 845        struct skcipher_walk walk;
 846        int err;
 847
 848        if (req->cryptlen < AES_BLOCK_SIZE)
 849                return -EINVAL;
 850
 851        err = skcipher_walk_virt(&walk, req, false);
 852
 853        if (unlikely(tail > 0 && walk.nbytes < walk.total)) {
 854                int blocks = DIV_ROUND_UP(req->cryptlen, AES_BLOCK_SIZE) - 2;
 855
 856                skcipher_walk_abort(&walk);
 857
 858                skcipher_request_set_tfm(&subreq, tfm);
 859                skcipher_request_set_callback(&subreq,
 860                                              skcipher_request_flags(req),
 861                                              NULL, NULL);
 862                skcipher_request_set_crypt(&subreq, req->src, req->dst,
 863                                           blocks * AES_BLOCK_SIZE, req->iv);
 864                req = &subreq;
 865                err = skcipher_walk_virt(&walk, req, false);
 866        } else {
 867                tail = 0;
 868        }
 869
 870        kernel_fpu_begin();
 871
 872        /* calculate first value of T */
 873        aesni_enc(aes_ctx(ctx->raw_tweak_ctx), walk.iv, walk.iv);
 874
 875        while (walk.nbytes > 0) {
 876                int nbytes = walk.nbytes;
 877
 878                if (nbytes < walk.total)
 879                        nbytes &= ~(AES_BLOCK_SIZE - 1);
 880
 881                if (encrypt)
 882                        aesni_xts_encrypt(aes_ctx(ctx->raw_crypt_ctx),
 883                                          walk.dst.virt.addr, walk.src.virt.addr,
 884                                          nbytes, walk.iv);
 885                else
 886                        aesni_xts_decrypt(aes_ctx(ctx->raw_crypt_ctx),
 887                                          walk.dst.virt.addr, walk.src.virt.addr,
 888                                          nbytes, walk.iv);
 889                kernel_fpu_end();
 890
 891                err = skcipher_walk_done(&walk, walk.nbytes - nbytes);
 892
 893                if (walk.nbytes > 0)
 894                        kernel_fpu_begin();
 895        }
 896
 897        if (unlikely(tail > 0 && !err)) {
 898                struct scatterlist sg_src[2], sg_dst[2];
 899                struct scatterlist *src, *dst;
 900
 901                dst = src = scatterwalk_ffwd(sg_src, req->src, req->cryptlen);
 902                if (req->dst != req->src)
 903                        dst = scatterwalk_ffwd(sg_dst, req->dst, req->cryptlen);
 904
 905                skcipher_request_set_crypt(req, src, dst, AES_BLOCK_SIZE + tail,
 906                                           req->iv);
 907
 908                err = skcipher_walk_virt(&walk, &subreq, false);
 909                if (err)
 910                        return err;
 911
 912                kernel_fpu_begin();
 913                if (encrypt)
 914                        aesni_xts_encrypt(aes_ctx(ctx->raw_crypt_ctx),
 915                                          walk.dst.virt.addr, walk.src.virt.addr,
 916                                          walk.nbytes, walk.iv);
 917                else
 918                        aesni_xts_decrypt(aes_ctx(ctx->raw_crypt_ctx),
 919                                          walk.dst.virt.addr, walk.src.virt.addr,
 920                                          walk.nbytes, walk.iv);
 921                kernel_fpu_end();
 922
 923                err = skcipher_walk_done(&walk, 0);
 924        }
 925        return err;
 926}
 927
 928static int xts_encrypt(struct skcipher_request *req)
 929{
 930        return xts_crypt(req, true);
 931}
 932
 933static int xts_decrypt(struct skcipher_request *req)
 934{
 935        return xts_crypt(req, false);
 936}
 937
 938static struct crypto_alg aesni_cipher_alg = {
 939        .cra_name               = "aes",
 940        .cra_driver_name        = "aes-aesni",
 941        .cra_priority           = 300,
 942        .cra_flags              = CRYPTO_ALG_TYPE_CIPHER,
 943        .cra_blocksize          = AES_BLOCK_SIZE,
 944        .cra_ctxsize            = CRYPTO_AES_CTX_SIZE,
 945        .cra_module             = THIS_MODULE,
 946        .cra_u  = {
 947                .cipher = {
 948                        .cia_min_keysize        = AES_MIN_KEY_SIZE,
 949                        .cia_max_keysize        = AES_MAX_KEY_SIZE,
 950                        .cia_setkey             = aes_set_key,
 951                        .cia_encrypt            = aesni_encrypt,
 952                        .cia_decrypt            = aesni_decrypt
 953                }
 954        }
 955};
 956
 957static struct skcipher_alg aesni_skciphers[] = {
 958        {
 959                .base = {
 960                        .cra_name               = "__ecb(aes)",
 961                        .cra_driver_name        = "__ecb-aes-aesni",
 962                        .cra_priority           = 400,
 963                        .cra_flags              = CRYPTO_ALG_INTERNAL,
 964                        .cra_blocksize          = AES_BLOCK_SIZE,
 965                        .cra_ctxsize            = CRYPTO_AES_CTX_SIZE,
 966                        .cra_module             = THIS_MODULE,
 967                },
 968                .min_keysize    = AES_MIN_KEY_SIZE,
 969                .max_keysize    = AES_MAX_KEY_SIZE,
 970                .setkey         = aesni_skcipher_setkey,
 971                .encrypt        = ecb_encrypt,
 972                .decrypt        = ecb_decrypt,
 973        }, {
 974                .base = {
 975                        .cra_name               = "__cbc(aes)",
 976                        .cra_driver_name        = "__cbc-aes-aesni",
 977                        .cra_priority           = 400,
 978                        .cra_flags              = CRYPTO_ALG_INTERNAL,
 979                        .cra_blocksize          = AES_BLOCK_SIZE,
 980                        .cra_ctxsize            = CRYPTO_AES_CTX_SIZE,
 981                        .cra_module             = THIS_MODULE,
 982                },
 983                .min_keysize    = AES_MIN_KEY_SIZE,
 984                .max_keysize    = AES_MAX_KEY_SIZE,
 985                .ivsize         = AES_BLOCK_SIZE,
 986                .setkey         = aesni_skcipher_setkey,
 987                .encrypt        = cbc_encrypt,
 988                .decrypt        = cbc_decrypt,
 989        }, {
 990                .base = {
 991                        .cra_name               = "__cts(cbc(aes))",
 992                        .cra_driver_name        = "__cts-cbc-aes-aesni",
 993                        .cra_priority           = 400,
 994                        .cra_flags              = CRYPTO_ALG_INTERNAL,
 995                        .cra_blocksize          = AES_BLOCK_SIZE,
 996                        .cra_ctxsize            = CRYPTO_AES_CTX_SIZE,
 997                        .cra_module             = THIS_MODULE,
 998                },
 999                .min_keysize    = AES_MIN_KEY_SIZE,
1000                .max_keysize    = AES_MAX_KEY_SIZE,
1001                .ivsize         = AES_BLOCK_SIZE,
1002                .walksize       = 2 * AES_BLOCK_SIZE,
1003                .setkey         = aesni_skcipher_setkey,
1004                .encrypt        = cts_cbc_encrypt,
1005                .decrypt        = cts_cbc_decrypt,
1006#ifdef CONFIG_X86_64
1007        }, {
1008                .base = {
1009                        .cra_name               = "__ctr(aes)",
1010                        .cra_driver_name        = "__ctr-aes-aesni",
1011                        .cra_priority           = 400,
1012                        .cra_flags              = CRYPTO_ALG_INTERNAL,
1013                        .cra_blocksize          = 1,
1014                        .cra_ctxsize            = CRYPTO_AES_CTX_SIZE,
1015                        .cra_module             = THIS_MODULE,
1016                },
1017                .min_keysize    = AES_MIN_KEY_SIZE,
1018                .max_keysize    = AES_MAX_KEY_SIZE,
1019                .ivsize         = AES_BLOCK_SIZE,
1020                .chunksize      = AES_BLOCK_SIZE,
1021                .setkey         = aesni_skcipher_setkey,
1022                .encrypt        = ctr_crypt,
1023                .decrypt        = ctr_crypt,
1024#endif
1025        }, {
1026                .base = {
1027                        .cra_name               = "__xts(aes)",
1028                        .cra_driver_name        = "__xts-aes-aesni",
1029                        .cra_priority           = 401,
1030                        .cra_flags              = CRYPTO_ALG_INTERNAL,
1031                        .cra_blocksize          = AES_BLOCK_SIZE,
1032                        .cra_ctxsize            = XTS_AES_CTX_SIZE,
1033                        .cra_module             = THIS_MODULE,
1034                },
1035                .min_keysize    = 2 * AES_MIN_KEY_SIZE,
1036                .max_keysize    = 2 * AES_MAX_KEY_SIZE,
1037                .ivsize         = AES_BLOCK_SIZE,
1038                .walksize       = 2 * AES_BLOCK_SIZE,
1039                .setkey         = xts_aesni_setkey,
1040                .encrypt        = xts_encrypt,
1041                .decrypt        = xts_decrypt,
1042        }
1043};
1044
1045static
1046struct simd_skcipher_alg *aesni_simd_skciphers[ARRAY_SIZE(aesni_skciphers)];
1047
1048#ifdef CONFIG_X86_64
1049static int generic_gcmaes_set_key(struct crypto_aead *aead, const u8 *key,
1050                                  unsigned int key_len)
1051{
1052        struct generic_gcmaes_ctx *ctx = generic_gcmaes_ctx_get(aead);
1053
1054        return aes_set_key_common(crypto_aead_tfm(aead),
1055                                  &ctx->aes_key_expanded, key, key_len) ?:
1056               rfc4106_set_hash_subkey(ctx->hash_subkey, key, key_len);
1057}
1058
1059static int generic_gcmaes_encrypt(struct aead_request *req)
1060{
1061        struct crypto_aead *tfm = crypto_aead_reqtfm(req);
1062        struct generic_gcmaes_ctx *ctx = generic_gcmaes_ctx_get(tfm);
1063        void *aes_ctx = &(ctx->aes_key_expanded);
1064        u8 ivbuf[16 + (AESNI_ALIGN - 8)] __aligned(8);
1065        u8 *iv = PTR_ALIGN(&ivbuf[0], AESNI_ALIGN);
1066        __be32 counter = cpu_to_be32(1);
1067
1068        memcpy(iv, req->iv, 12);
1069        *((__be32 *)(iv+12)) = counter;
1070
1071        return gcmaes_encrypt(req, req->assoclen, ctx->hash_subkey, iv,
1072                              aes_ctx);
1073}
1074
1075static int generic_gcmaes_decrypt(struct aead_request *req)
1076{
1077        __be32 counter = cpu_to_be32(1);
1078        struct crypto_aead *tfm = crypto_aead_reqtfm(req);
1079        struct generic_gcmaes_ctx *ctx = generic_gcmaes_ctx_get(tfm);
1080        void *aes_ctx = &(ctx->aes_key_expanded);
1081        u8 ivbuf[16 + (AESNI_ALIGN - 8)] __aligned(8);
1082        u8 *iv = PTR_ALIGN(&ivbuf[0], AESNI_ALIGN);
1083
1084        memcpy(iv, req->iv, 12);
1085        *((__be32 *)(iv+12)) = counter;
1086
1087        return gcmaes_decrypt(req, req->assoclen, ctx->hash_subkey, iv,
1088                              aes_ctx);
1089}
1090
1091static struct aead_alg aesni_aeads[] = { {
1092        .setkey                 = common_rfc4106_set_key,
1093        .setauthsize            = common_rfc4106_set_authsize,
1094        .encrypt                = helper_rfc4106_encrypt,
1095        .decrypt                = helper_rfc4106_decrypt,
1096        .ivsize                 = GCM_RFC4106_IV_SIZE,
1097        .maxauthsize            = 16,
1098        .base = {
1099                .cra_name               = "__rfc4106(gcm(aes))",
1100                .cra_driver_name        = "__rfc4106-gcm-aesni",
1101                .cra_priority           = 400,
1102                .cra_flags              = CRYPTO_ALG_INTERNAL,
1103                .cra_blocksize          = 1,
1104                .cra_ctxsize            = sizeof(struct aesni_rfc4106_gcm_ctx),
1105                .cra_alignmask          = AESNI_ALIGN - 1,
1106                .cra_module             = THIS_MODULE,
1107        },
1108}, {
1109        .setkey                 = generic_gcmaes_set_key,
1110        .setauthsize            = generic_gcmaes_set_authsize,
1111        .encrypt                = generic_gcmaes_encrypt,
1112        .decrypt                = generic_gcmaes_decrypt,
1113        .ivsize                 = GCM_AES_IV_SIZE,
1114        .maxauthsize            = 16,
1115        .base = {
1116                .cra_name               = "__gcm(aes)",
1117                .cra_driver_name        = "__generic-gcm-aesni",
1118                .cra_priority           = 400,
1119                .cra_flags              = CRYPTO_ALG_INTERNAL,
1120                .cra_blocksize          = 1,
1121                .cra_ctxsize            = sizeof(struct generic_gcmaes_ctx),
1122                .cra_alignmask          = AESNI_ALIGN - 1,
1123                .cra_module             = THIS_MODULE,
1124        },
1125} };
1126#else
1127static struct aead_alg aesni_aeads[0];
1128#endif
1129
1130static struct simd_aead_alg *aesni_simd_aeads[ARRAY_SIZE(aesni_aeads)];
1131
1132static const struct x86_cpu_id aesni_cpu_id[] = {
1133        X86_MATCH_FEATURE(X86_FEATURE_AES, NULL),
1134        {}
1135};
1136MODULE_DEVICE_TABLE(x86cpu, aesni_cpu_id);
1137
1138static int __init aesni_init(void)
1139{
1140        int err;
1141
1142        if (!x86_match_cpu(aesni_cpu_id))
1143                return -ENODEV;
1144#ifdef CONFIG_X86_64
1145        if (boot_cpu_has(X86_FEATURE_AVX2)) {
1146                pr_info("AVX2 version of gcm_enc/dec engaged.\n");
1147                static_branch_enable(&gcm_use_avx);
1148                static_branch_enable(&gcm_use_avx2);
1149        } else
1150        if (boot_cpu_has(X86_FEATURE_AVX)) {
1151                pr_info("AVX version of gcm_enc/dec engaged.\n");
1152                static_branch_enable(&gcm_use_avx);
1153        } else {
1154                pr_info("SSE version of gcm_enc/dec engaged.\n");
1155        }
1156        if (boot_cpu_has(X86_FEATURE_AVX)) {
1157                /* optimize performance of ctr mode encryption transform */
1158                static_call_update(aesni_ctr_enc_tfm, aesni_ctr_enc_avx_tfm);
1159                pr_info("AES CTR mode by8 optimization enabled\n");
1160        }
1161#endif
1162
1163        err = crypto_register_alg(&aesni_cipher_alg);
1164        if (err)
1165                return err;
1166
1167        err = simd_register_skciphers_compat(aesni_skciphers,
1168                                             ARRAY_SIZE(aesni_skciphers),
1169                                             aesni_simd_skciphers);
1170        if (err)
1171                goto unregister_cipher;
1172
1173        err = simd_register_aeads_compat(aesni_aeads, ARRAY_SIZE(aesni_aeads),
1174                                         aesni_simd_aeads);
1175        if (err)
1176                goto unregister_skciphers;
1177
1178        return 0;
1179
1180unregister_skciphers:
1181        simd_unregister_skciphers(aesni_skciphers, ARRAY_SIZE(aesni_skciphers),
1182                                  aesni_simd_skciphers);
1183unregister_cipher:
1184        crypto_unregister_alg(&aesni_cipher_alg);
1185        return err;
1186}
1187
1188static void __exit aesni_exit(void)
1189{
1190        simd_unregister_aeads(aesni_aeads, ARRAY_SIZE(aesni_aeads),
1191                              aesni_simd_aeads);
1192        simd_unregister_skciphers(aesni_skciphers, ARRAY_SIZE(aesni_skciphers),
1193                                  aesni_simd_skciphers);
1194        crypto_unregister_alg(&aesni_cipher_alg);
1195}
1196
1197late_initcall(aesni_init);
1198module_exit(aesni_exit);
1199
1200MODULE_DESCRIPTION("Rijndael (AES) Cipher Algorithm, Intel AES-NI instructions optimized");
1201MODULE_LICENSE("GPL");
1202MODULE_ALIAS_CRYPTO("aes");
1203