_ Git - BearSSL/blob - src/symcipher/aes_x86ni_ctr.c

   1 /*
   2  * Copyright (c) 2017 Thomas Pornin <pornin@bolet.org>
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining
   5  * a copy of this software and associated documentation files (the
   6  * "Software"), to deal in the Software without restriction, including
   7  * without limitation the rights to use, copy, modify, merge, publish,
   8  * distribute, sublicense, and/or sell copies of the Software, and to
   9  * permit persons to whom the Software is furnished to do so, subject to
  10  * the following conditions:
  11  *
  12  * The above copyright notice and this permission notice shall be
  13  * included in all copies or substantial portions of the Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  16  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  17  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  18  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  19  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  20  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  21  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  22  * SOFTWARE.
  23  */
  24
  25 #define BR_ENABLE_INTRINSICS   1
  26 #include "inner.h"
  27
  28 #if BR_AES_X86NI
  29
  30 /* see bearssl_block.h */
  31 const br_block_ctr_class *
  32 br_aes_x86ni_ctr_get_vtable(void)
  33 {
  34         return br_aes_x86ni_supported() ? &br_aes_x86ni_ctr_vtable : NULL;
  35 }
  36
  37 /* see bearssl_block.h */
  38 void
  39 br_aes_x86ni_ctr_init(br_aes_x86ni_ctr_keys *ctx,
  40         const void *key, size_t len)
  41 {
  42         ctx->vtable = &br_aes_x86ni_ctr_vtable;
  43         ctx->num_rounds = br_aes_x86ni_keysched_enc(ctx->skey.skni, key, len);
  44 }
  45
  46 BR_TARGETS_X86_UP
  47
  48 /* see bearssl_block.h */
  49 BR_TARGET("sse2,sse4.1,aes")
  50 uint32_t
  51 br_aes_x86ni_ctr_run(const br_aes_x86ni_ctr_keys *ctx,
  52         const void *iv, uint32_t cc, void *data, size_t len)
  53 {
  54         unsigned char *buf;
  55         unsigned char ivbuf[16];
  56         unsigned num_rounds;
  57         __m128i sk[15];
  58         __m128i ivx;
  59         unsigned u;
  60
  61         buf = data;
  62         memcpy(ivbuf, iv, 12);
  63         num_rounds = ctx->num_rounds;
  64         for (u = 0; u <= num_rounds; u ++) {
  65                 sk[u] = _mm_loadu_si128((void *)(ctx->skey.skni + (u << 4)));
  66         }
  67         ivx = _mm_loadu_si128((void *)ivbuf);
  68         while (len > 0) {
  69                 __m128i x0, x1, x2, x3;
  70
  71                 x0 = _mm_insert_epi32(ivx, br_bswap32(cc + 0), 3);
  72                 x1 = _mm_insert_epi32(ivx, br_bswap32(cc + 1), 3);
  73                 x2 = _mm_insert_epi32(ivx, br_bswap32(cc + 2), 3);
  74                 x3 = _mm_insert_epi32(ivx, br_bswap32(cc + 3), 3);
  75                 x0 = _mm_xor_si128(x0, sk[0]);
  76                 x1 = _mm_xor_si128(x1, sk[0]);
  77                 x2 = _mm_xor_si128(x2, sk[0]);
  78                 x3 = _mm_xor_si128(x3, sk[0]);
  79                 x0 = _mm_aesenc_si128(x0, sk[1]);
  80                 x1 = _mm_aesenc_si128(x1, sk[1]);
  81                 x2 = _mm_aesenc_si128(x2, sk[1]);
  82                 x3 = _mm_aesenc_si128(x3, sk[1]);
  83                 x0 = _mm_aesenc_si128(x0, sk[2]);
  84                 x1 = _mm_aesenc_si128(x1, sk[2]);
  85                 x2 = _mm_aesenc_si128(x2, sk[2]);
  86                 x3 = _mm_aesenc_si128(x3, sk[2]);
  87                 x0 = _mm_aesenc_si128(x0, sk[3]);
  88                 x1 = _mm_aesenc_si128(x1, sk[3]);
  89                 x2 = _mm_aesenc_si128(x2, sk[3]);
  90                 x3 = _mm_aesenc_si128(x3, sk[3]);
  91                 x0 = _mm_aesenc_si128(x0, sk[4]);
  92                 x1 = _mm_aesenc_si128(x1, sk[4]);
  93                 x2 = _mm_aesenc_si128(x2, sk[4]);
  94                 x3 = _mm_aesenc_si128(x3, sk[4]);
  95                 x0 = _mm_aesenc_si128(x0, sk[5]);
  96                 x1 = _mm_aesenc_si128(x1, sk[5]);
  97                 x2 = _mm_aesenc_si128(x2, sk[5]);
  98                 x3 = _mm_aesenc_si128(x3, sk[5]);
  99                 x0 = _mm_aesenc_si128(x0, sk[6]);
 100                 x1 = _mm_aesenc_si128(x1, sk[6]);
 101                 x2 = _mm_aesenc_si128(x2, sk[6]);
 102                 x3 = _mm_aesenc_si128(x3, sk[6]);
 103                 x0 = _mm_aesenc_si128(x0, sk[7]);
 104                 x1 = _mm_aesenc_si128(x1, sk[7]);
 105                 x2 = _mm_aesenc_si128(x2, sk[7]);
 106                 x3 = _mm_aesenc_si128(x3, sk[7]);
 107                 x0 = _mm_aesenc_si128(x0, sk[8]);
 108                 x1 = _mm_aesenc_si128(x1, sk[8]);
 109                 x2 = _mm_aesenc_si128(x2, sk[8]);
 110                 x3 = _mm_aesenc_si128(x3, sk[8]);
 111                 x0 = _mm_aesenc_si128(x0, sk[9]);
 112                 x1 = _mm_aesenc_si128(x1, sk[9]);
 113                 x2 = _mm_aesenc_si128(x2, sk[9]);
 114                 x3 = _mm_aesenc_si128(x3, sk[9]);
 115                 if (num_rounds == 10) {
 116                         x0 = _mm_aesenclast_si128(x0, sk[10]);
 117                         x1 = _mm_aesenclast_si128(x1, sk[10]);
 118                         x2 = _mm_aesenclast_si128(x2, sk[10]);
 119                         x3 = _mm_aesenclast_si128(x3, sk[10]);
 120                 } else if (num_rounds == 12) {
 121                         x0 = _mm_aesenc_si128(x0, sk[10]);
 122                         x1 = _mm_aesenc_si128(x1, sk[10]);
 123                         x2 = _mm_aesenc_si128(x2, sk[10]);
 124                         x3 = _mm_aesenc_si128(x3, sk[10]);
 125                         x0 = _mm_aesenc_si128(x0, sk[11]);
 126                         x1 = _mm_aesenc_si128(x1, sk[11]);
 127                         x2 = _mm_aesenc_si128(x2, sk[11]);
 128                         x3 = _mm_aesenc_si128(x3, sk[11]);
 129                         x0 = _mm_aesenclast_si128(x0, sk[12]);
 130                         x1 = _mm_aesenclast_si128(x1, sk[12]);
 131                         x2 = _mm_aesenclast_si128(x2, sk[12]);
 132                         x3 = _mm_aesenclast_si128(x3, sk[12]);
 133                 } else {
 134                         x0 = _mm_aesenc_si128(x0, sk[10]);
 135                         x1 = _mm_aesenc_si128(x1, sk[10]);
 136                         x2 = _mm_aesenc_si128(x2, sk[10]);
 137                         x3 = _mm_aesenc_si128(x3, sk[10]);
 138                         x0 = _mm_aesenc_si128(x0, sk[11]);
 139                         x1 = _mm_aesenc_si128(x1, sk[11]);
 140                         x2 = _mm_aesenc_si128(x2, sk[11]);
 141                         x3 = _mm_aesenc_si128(x3, sk[11]);
 142                         x0 = _mm_aesenc_si128(x0, sk[12]);
 143                         x1 = _mm_aesenc_si128(x1, sk[12]);
 144                         x2 = _mm_aesenc_si128(x2, sk[12]);
 145                         x3 = _mm_aesenc_si128(x3, sk[12]);
 146                         x0 = _mm_aesenc_si128(x0, sk[13]);
 147                         x1 = _mm_aesenc_si128(x1, sk[13]);
 148                         x2 = _mm_aesenc_si128(x2, sk[13]);
 149                         x3 = _mm_aesenc_si128(x3, sk[13]);
 150                         x0 = _mm_aesenclast_si128(x0, sk[14]);
 151                         x1 = _mm_aesenclast_si128(x1, sk[14]);
 152                         x2 = _mm_aesenclast_si128(x2, sk[14]);
 153                         x3 = _mm_aesenclast_si128(x3, sk[14]);
 154                 }
 155                 if (len >= 64) {
 156                         x0 = _mm_xor_si128(x0,
 157                                 _mm_loadu_si128((void *)(buf +  0)));
 158                         x1 = _mm_xor_si128(x1,
 159                                 _mm_loadu_si128((void *)(buf + 16)));
 160                         x2 = _mm_xor_si128(x2,
 161                                 _mm_loadu_si128((void *)(buf + 32)));
 162                         x3 = _mm_xor_si128(x3,
 163                                 _mm_loadu_si128((void *)(buf + 48)));
 164                         _mm_storeu_si128((void *)(buf +  0), x0);
 165                         _mm_storeu_si128((void *)(buf + 16), x1);
 166                         _mm_storeu_si128((void *)(buf + 32), x2);
 167                         _mm_storeu_si128((void *)(buf + 48), x3);
 168                         buf += 64;
 169                         len -= 64;
 170                         cc += 4;
 171                 } else {
 172                         unsigned char tmp[64];
 173
 174                         _mm_storeu_si128((void *)(tmp +  0), x0);
 175                         _mm_storeu_si128((void *)(tmp + 16), x1);
 176                         _mm_storeu_si128((void *)(tmp + 32), x2);
 177                         _mm_storeu_si128((void *)(tmp + 48), x3);
 178                         for (u = 0; u < len; u ++) {
 179                                 buf[u] ^= tmp[u];
 180                         }
 181                         cc += (uint32_t)len >> 4;
 182                         break;
 183                 }
 184         }
 185         return cc;
 186 }
 187
 188 BR_TARGETS_X86_DOWN
 189
 190 /* see bearssl_block.h */
 191 const br_block_ctr_class br_aes_x86ni_ctr_vtable = {
 192         sizeof(br_aes_x86ni_ctr_keys),
 193         16,
 194         4,
 195         (void (*)(const br_block_ctr_class **, const void *, size_t))
 196                 &br_aes_x86ni_ctr_init,
 197         (uint32_t (*)(const br_block_ctr_class *const *,
 198                 const void *, uint32_t, void *, size_t))
 199                 &br_aes_x86ni_ctr_run
 200 };
 201
 202 #else
 203
 204 /* see bearssl_block.h */
 205 const br_block_ctr_class *
 206 br_aes_x86ni_ctr_get_vtable(void)
 207 {
 208         return NULL;
 209 }
 210
 211 #endif