providers/implementations/ciphers/cipher_aes_gcm_hw_aesni.inc

   1 /*
   2  * Copyright 2001-2019 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the Apache License 2.0 (the "License").  You may not use
   5  * this file except in compliance with the License.  You can obtain a copy
   6  * in the file LICENSE in the source distribution or at
   7  * https://www.openssl.org/source/license.html
   8  */
   9
  10 /*-
  11  * AES-NI support for AES GCM.
  12  * This file is included by cipher_gcm_hw.c
  13  */
  14
  15 static int aesni_gcm_initkey(PROV_GCM_CTX *ctx, const unsigned char *key,
  16                              size_t keylen)
  17 {
  18     PROV_AES_GCM_CTX *actx = (PROV_AES_GCM_CTX *)ctx;
  19     AES_KEY *ks = &actx->ks.ks;
  20     GCM_HW_SET_KEY_CTR_FN(ks, aesni_set_encrypt_key, aesni_encrypt,
  21                           aesni_ctr32_encrypt_blocks);
  22     return 1;
  23 }
  24
  25 static const PROV_GCM_HW aesni_gcm = {
  26     aesni_gcm_initkey,
  27     gcm_setiv,
  28     gcm_aad_update,
  29     gcm_cipher_update,
  30     gcm_cipher_final,
  31     gcm_one_shot
  32 };
  33
  34 const PROV_GCM_HW *PROV_AES_HW_gcm(size_t keybits)
  35 {
  36     return AESNI_CAPABLE ? &aesni_gcm : &aes_gcm;
  37 }
  38