providers/implementations/ciphers/cipher_aes_gcm_hw.c

   1 /*
   2  * Copyright 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 /* Dispatch functions for AES GCM mode */
  11
  12 #include "cipher_aes_gcm.h"
  13
  14 static int generic_aes_gcm_initkey(PROV_GCM_CTX *ctx, const unsigned char *key,
  15                                    size_t keylen)
  16 {
  17     PROV_AES_GCM_CTX *actx = (PROV_AES_GCM_CTX *)ctx;
  18     AES_KEY *ks = &actx->ks.ks;
  19
  20 # ifdef HWAES_CAPABLE
  21     if (HWAES_CAPABLE) {
  22 #  ifdef HWAES_ctr32_encrypt_blocks
  23         GCM_HW_SET_KEY_CTR_FN(ks, HWAES_set_encrypt_key, HWAES_encrypt,
  24                               HWAES_ctr32_encrypt_blocks);
  25 #  else
  26         GCM_HW_SET_KEY_CTR_FN(ks, HWAES_set_encrypt_key, HWAES_encrypt, NULL);
  27 #  endif /* HWAES_ctr32_encrypt_blocks */
  28     } else
  29 # endif /* HWAES_CAPABLE */
  30
  31 # ifdef BSAES_CAPABLE
  32     if (BSAES_CAPABLE) {
  33         GCM_HW_SET_KEY_CTR_FN(ks, AES_set_encrypt_key, AES_encrypt,
  34                               bsaes_ctr32_encrypt_blocks);
  35     } else
  36 # endif /* BSAES_CAPABLE */
  37
  38 # ifdef VPAES_CAPABLE
  39     if (VPAES_CAPABLE) {
  40         GCM_HW_SET_KEY_CTR_FN(ks, vpaes_set_encrypt_key, vpaes_encrypt, NULL);
  41     } else
  42 # endif /* VPAES_CAPABLE */
  43
  44     {
  45 # ifdef AES_CTR_ASM
  46         GCM_HW_SET_KEY_CTR_FN(ks, AES_set_encrypt_key, AES_encrypt,
  47                               AES_ctr32_encrypt);
  48 # else
  49         GCM_HW_SET_KEY_CTR_FN(ks, AES_set_encrypt_key, AES_encrypt, NULL);
  50 # endif /* AES_CTR_ASM */
  51     }
  52     ctx->key_set = 1;
  53     return 1;
  54 }
  55
  56 static const PROV_GCM_HW aes_gcm = {
  57     generic_aes_gcm_initkey,
  58     gcm_setiv,
  59     gcm_aad_update,
  60     gcm_cipher_update,
  61     gcm_cipher_final,
  62     gcm_one_shot
  63 };
  64
  65 #if defined(S390X_aes_128_CAPABLE)
  66 # include "cipher_aes_gcm_hw_s390x.inc"
  67 #elif defined(AESNI_CAPABLE)
  68 # include "cipher_aes_gcm_hw_aesni.inc"
  69 #elif defined(SPARC_AES_CAPABLE)
  70 # include "cipher_aes_gcm_hw_t4.inc"
  71 #elif defined(AES_PMULL_CAPABLE) && defined(AES_GCM_ASM)
  72 # include "cipher_aes_gcm_hw_armv8.inc"
  73 #else
  74 const PROV_GCM_HW *PROV_AES_HW_gcm(size_t keybits)
  75 {
  76     return &aes_gcm;
  77 }
  78 #endif
  79