arch/x86/crypto/aria_aesni_avx_glue.c

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  * Glue Code for the AVX/AES-NI/GFNI assembler implementation of the ARIA Cipher
   4  *
   5  * Copyright (c) 2022 Taehee Yoo <ap420073@gmail.com>
   6  */
   7
   8 #include <crypto/algapi.h>
   9 #include <crypto/internal/simd.h>
  10 #include <crypto/aria.h>
  11 #include <linux/crypto.h>
  12 #include <linux/err.h>
  13 #include <linux/module.h>
  14 #include <linux/types.h>
  15
  16 #include "ecb_cbc_helpers.h"
  17 #include "aria-avx.h"
  18
  19 asmlinkage void aria_aesni_avx_encrypt_16way(const void *ctx, u8 *dst,
  20                                              const u8 *src);
  21 EXPORT_SYMBOL_GPL(aria_aesni_avx_encrypt_16way);
  22 asmlinkage void aria_aesni_avx_decrypt_16way(const void *ctx, u8 *dst,
  23                                              const u8 *src);
  24 EXPORT_SYMBOL_GPL(aria_aesni_avx_decrypt_16way);
  25 asmlinkage void aria_aesni_avx_ctr_crypt_16way(const void *ctx, u8 *dst,
  26                                                const u8 *src,
  27                                                u8 *keystream, u8 *iv);
  28 EXPORT_SYMBOL_GPL(aria_aesni_avx_ctr_crypt_16way);
  29 #ifdef CONFIG_AS_GFNI
  30 asmlinkage void aria_aesni_avx_gfni_encrypt_16way(const void *ctx, u8 *dst,
  31                                                   const u8 *src);
  32 EXPORT_SYMBOL_GPL(aria_aesni_avx_gfni_encrypt_16way);
  33 asmlinkage void aria_aesni_avx_gfni_decrypt_16way(const void *ctx, u8 *dst,
  34                                                   const u8 *src);
  35 EXPORT_SYMBOL_GPL(aria_aesni_avx_gfni_decrypt_16way);
  36 asmlinkage void aria_aesni_avx_gfni_ctr_crypt_16way(const void *ctx, u8 *dst,
  37                                                     const u8 *src,
  38                                                     u8 *keystream, u8 *iv);
  39 EXPORT_SYMBOL_GPL(aria_aesni_avx_gfni_ctr_crypt_16way);
  40 #endif /* CONFIG_AS_GFNI */
  41
  42 static struct aria_avx_ops aria_ops;
  43
  44 struct aria_avx_request_ctx {
  45         u8 keystream[ARIA_AESNI_PARALLEL_BLOCK_SIZE];
  46 };
  47
  48 static int ecb_do_encrypt(struct skcipher_request *req, const u32 *rkey)
  49 {
  50         ECB_WALK_START(req, ARIA_BLOCK_SIZE, ARIA_AESNI_PARALLEL_BLOCKS);
  51         ECB_BLOCK(ARIA_AESNI_PARALLEL_BLOCKS, aria_ops.aria_encrypt_16way);
  52         ECB_BLOCK(1, aria_encrypt);
  53         ECB_WALK_END();
  54 }
  55
  56 static int ecb_do_decrypt(struct skcipher_request *req, const u32 *rkey)
  57 {
  58         ECB_WALK_START(req, ARIA_BLOCK_SIZE, ARIA_AESNI_PARALLEL_BLOCKS);
  59         ECB_BLOCK(ARIA_AESNI_PARALLEL_BLOCKS, aria_ops.aria_decrypt_16way);
  60         ECB_BLOCK(1, aria_decrypt);
  61         ECB_WALK_END();
  62 }
  63
  64 static int aria_avx_ecb_encrypt(struct skcipher_request *req)
  65 {
  66         struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
  67         struct aria_ctx *ctx = crypto_skcipher_ctx(tfm);
  68
  69         return ecb_do_encrypt(req, ctx->enc_key[0]);
  70 }
  71
  72 static int aria_avx_ecb_decrypt(struct skcipher_request *req)
  73 {
  74         struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
  75         struct aria_ctx *ctx = crypto_skcipher_ctx(tfm);
  76
  77         return ecb_do_decrypt(req, ctx->dec_key[0]);
  78 }
  79
  80 static int aria_avx_set_key(struct crypto_skcipher *tfm, const u8 *key,
  81                             unsigned int keylen)
  82 {
  83         return aria_set_key(&tfm->base, key, keylen);
  84 }
  85
  86 static int aria_avx_ctr_encrypt(struct skcipher_request *req)
  87 {
  88         struct aria_avx_request_ctx *req_ctx = skcipher_request_ctx(req);
  89         struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
  90         struct aria_ctx *ctx = crypto_skcipher_ctx(tfm);
  91         struct skcipher_walk walk;
  92         unsigned int nbytes;
  93         int err;
  94
  95         err = skcipher_walk_virt(&walk, req, false);
  96
  97         while ((nbytes = walk.nbytes) > 0) {
  98                 const u8 *src = walk.src.virt.addr;
  99                 u8 *dst = walk.dst.virt.addr;
 100
 101                 while (nbytes >= ARIA_AESNI_PARALLEL_BLOCK_SIZE) {
 102                         kernel_fpu_begin();
 103                         aria_ops.aria_ctr_crypt_16way(ctx, dst, src,
 104                                                       &req_ctx->keystream[0],
 105                                                       walk.iv);
 106                         kernel_fpu_end();
 107                         dst += ARIA_AESNI_PARALLEL_BLOCK_SIZE;
 108                         src += ARIA_AESNI_PARALLEL_BLOCK_SIZE;
 109                         nbytes -= ARIA_AESNI_PARALLEL_BLOCK_SIZE;
 110                 }
 111
 112                 while (nbytes >= ARIA_BLOCK_SIZE) {
 113                         memcpy(&req_ctx->keystream[0], walk.iv, ARIA_BLOCK_SIZE);
 114                         crypto_inc(walk.iv, ARIA_BLOCK_SIZE);
 115
 116                         aria_encrypt(ctx, &req_ctx->keystream[0],
 117                                      &req_ctx->keystream[0]);
 118
 119                         crypto_xor_cpy(dst, src, &req_ctx->keystream[0],
 120                                        ARIA_BLOCK_SIZE);
 121                         dst += ARIA_BLOCK_SIZE;
 122                         src += ARIA_BLOCK_SIZE;
 123                         nbytes -= ARIA_BLOCK_SIZE;
 124                 }
 125
 126                 if (walk.nbytes == walk.total && nbytes > 0) {
 127                         memcpy(&req_ctx->keystream[0], walk.iv,
 128                                ARIA_BLOCK_SIZE);
 129                         crypto_inc(walk.iv, ARIA_BLOCK_SIZE);
 130
 131                         aria_encrypt(ctx, &req_ctx->keystream[0],
 132                                      &req_ctx->keystream[0]);
 133
 134                         crypto_xor_cpy(dst, src, &req_ctx->keystream[0],
 135                                        nbytes);
 136                         dst += nbytes;
 137                         src += nbytes;
 138                         nbytes = 0;
 139                 }
 140                 err = skcipher_walk_done(&walk, nbytes);
 141         }
 142
 143         return err;
 144 }
 145
 146 static int aria_avx_init_tfm(struct crypto_skcipher *tfm)
 147 {
 148         crypto_skcipher_set_reqsize(tfm, sizeof(struct aria_avx_request_ctx));
 149
 150         return 0;
 151 }
 152
 153 static struct skcipher_alg aria_algs[] = {
 154         {
 155                 .base.cra_name          = "__ecb(aria)",
 156                 .base.cra_driver_name   = "__ecb-aria-avx",
 157                 .base.cra_priority      = 400,
 158                 .base.cra_flags         = CRYPTO_ALG_INTERNAL,
 159                 .base.cra_blocksize     = ARIA_BLOCK_SIZE,
 160                 .base.cra_ctxsize       = sizeof(struct aria_ctx),
 161                 .base.cra_module        = THIS_MODULE,
 162                 .min_keysize            = ARIA_MIN_KEY_SIZE,
 163                 .max_keysize            = ARIA_MAX_KEY_SIZE,
 164                 .setkey                 = aria_avx_set_key,
 165                 .encrypt                = aria_avx_ecb_encrypt,
 166                 .decrypt                = aria_avx_ecb_decrypt,
 167         }, {
 168                 .base.cra_name          = "__ctr(aria)",
 169                 .base.cra_driver_name   = "__ctr-aria-avx",
 170                 .base.cra_priority      = 400,
 171                 .base.cra_flags         = CRYPTO_ALG_INTERNAL,
 172                 .base.cra_blocksize     = 1,
 173                 .base.cra_ctxsize       = sizeof(struct aria_ctx),
 174                 .base.cra_module        = THIS_MODULE,
 175                 .min_keysize            = ARIA_MIN_KEY_SIZE,
 176                 .max_keysize            = ARIA_MAX_KEY_SIZE,
 177                 .ivsize                 = ARIA_BLOCK_SIZE,
 178                 .chunksize              = ARIA_BLOCK_SIZE,
 179                 .walksize               = 16 * ARIA_BLOCK_SIZE,
 180                 .setkey                 = aria_avx_set_key,
 181                 .encrypt                = aria_avx_ctr_encrypt,
 182                 .decrypt                = aria_avx_ctr_encrypt,
 183                 .init                   = aria_avx_init_tfm,
 184         }
 185 };
 186
 187 static struct simd_skcipher_alg *aria_simd_algs[ARRAY_SIZE(aria_algs)];
 188
 189 static int __init aria_avx_init(void)
 190 {
 191         const char *feature_name;
 192
 193         if (!boot_cpu_has(X86_FEATURE_AVX) ||
 194             !boot_cpu_has(X86_FEATURE_AES) ||
 195             !boot_cpu_has(X86_FEATURE_OSXSAVE)) {
 196                 pr_info("AVX or AES-NI instructions are not detected.\n");
 197                 return -ENODEV;
 198         }
 199
 200         if (!cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM,
 201                                 &feature_name)) {
 202                 pr_info("CPU feature '%s' is not supported.\n", feature_name);
 203                 return -ENODEV;
 204         }
 205
 206         if (boot_cpu_has(X86_FEATURE_GFNI) && IS_ENABLED(CONFIG_AS_GFNI)) {
 207                 aria_ops.aria_encrypt_16way = aria_aesni_avx_gfni_encrypt_16way;
 208                 aria_ops.aria_decrypt_16way = aria_aesni_avx_gfni_decrypt_16way;
 209                 aria_ops.aria_ctr_crypt_16way = aria_aesni_avx_gfni_ctr_crypt_16way;
 210         } else {
 211                 aria_ops.aria_encrypt_16way = aria_aesni_avx_encrypt_16way;
 212                 aria_ops.aria_decrypt_16way = aria_aesni_avx_decrypt_16way;
 213                 aria_ops.aria_ctr_crypt_16way = aria_aesni_avx_ctr_crypt_16way;
 214         }
 215
 216         return simd_register_skciphers_compat(aria_algs,
 217                                               ARRAY_SIZE(aria_algs),
 218                                               aria_simd_algs);
 219 }
 220
 221 static void __exit aria_avx_exit(void)
 222 {
 223         simd_unregister_skciphers(aria_algs, ARRAY_SIZE(aria_algs),
 224                                   aria_simd_algs);
 225 }
 226
 227 module_init(aria_avx_init);
 228 module_exit(aria_avx_exit);
 229
 230 MODULE_LICENSE("GPL");
 231 MODULE_AUTHOR("Taehee Yoo <ap420073@gmail.com>");
 232 MODULE_DESCRIPTION("ARIA Cipher Algorithm, AVX/AES-NI/GFNI optimized");
 233 MODULE_ALIAS_CRYPTO("aria");
 234 MODULE_ALIAS_CRYPTO("aria-aesni-avx");