_ Git - BearSSL/blob - src/ssl/ssl_engine_default_aesgcm.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 #include "inner.h"
  26
  27 /* see bearssl_ssl.h */
  28 void
  29 br_ssl_engine_set_default_aes_gcm(br_ssl_engine_context *cc)
  30 {
  31 #if BR_AES_X86NI || BR_POWER8
  32         const br_block_ctr_class *ictr;
  33         br_ghash ighash;
  34 #endif
  35
  36         br_ssl_engine_set_gcm(cc,
  37                 &br_sslrec_in_gcm_vtable,
  38                 &br_sslrec_out_gcm_vtable);
  39 #if BR_AES_X86NI
  40         ictr = br_aes_x86ni_ctr_get_vtable();
  41         if (ictr != NULL) {
  42                 br_ssl_engine_set_aes_ctr(cc, ictr);
  43         } else {
  44 #if BR_64
  45                 br_ssl_engine_set_aes_ctr(cc, &br_aes_ct64_ctr_vtable);
  46 #else
  47                 br_ssl_engine_set_aes_ctr(cc, &br_aes_ct_ctr_vtable);
  48 #endif
  49         }
  50 #elif BR_POWER8
  51         ictr = br_aes_pwr8_ctr_get_vtable();
  52         if (ictr != NULL) {
  53                 br_ssl_engine_set_aes_ctr(cc, ictr);
  54         } else {
  55 #if BR_64
  56                 br_ssl_engine_set_aes_ctr(cc, &br_aes_ct64_ctr_vtable);
  57 #else
  58                 br_ssl_engine_set_aes_ctr(cc, &br_aes_ct_ctr_vtable);
  59 #endif
  60         }
  61 #else
  62 #if BR_64
  63         br_ssl_engine_set_aes_ctr(cc, &br_aes_ct64_ctr_vtable);
  64 #else
  65         br_ssl_engine_set_aes_ctr(cc, &br_aes_ct_ctr_vtable);
  66 #endif
  67 #endif
  68 #if BR_AES_X86NI
  69         ighash = br_ghash_pclmul_get();
  70         if (ighash != 0) {
  71                 br_ssl_engine_set_ghash(cc, ighash);
  72                 return;
  73         }
  74 #endif
  75 #if BR_POWER8
  76         ighash = br_ghash_pwr8_get();
  77         if (ighash != 0) {
  78                 br_ssl_engine_set_ghash(cc, ighash);
  79                 return;
  80         }
  81 #endif
  82 #if BR_LOMUL
  83         br_ssl_engine_set_ghash(cc, &br_ghash_ctmul32);
  84 #elif BR_64
  85         br_ssl_engine_set_ghash(cc, &br_ghash_ctmul64);
  86 #else
  87         br_ssl_engine_set_ghash(cc, &br_ghash_ctmul);
  88 #endif
  89 }