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 /*
  13  * This file uses the low level AES functions (which are deprecated for
  14  * non-internal use) in order to implement provider AES ciphers.
  15  */
  16 #include "internal/deprecated.h"
  17
  18 #include "cipher_aes_gcm.h"
  19
  20 static int generic_aes_gcm_initkey(PROV_GCM_CTX *ctx, const unsigned char *key,
  21                                    size_t keylen)
  22 {
  23     PROV_AES_GCM_CTX *actx = (PROV_AES_GCM_CTX *)ctx;
  24     AES_KEY *ks = &actx->ks.ks;
  25
  26 # ifdef HWAES_CAPABLE
  27     if (HWAES_CAPABLE) {
  28 #  ifdef HWAES_ctr32_encrypt_blocks
  29         GCM_HW_SET_KEY_CTR_FN(ks, HWAES_set_encrypt_key, HWAES_encrypt,
  30                               HWAES_ctr32_encrypt_blocks);
  31 #  else
  32         GCM_HW_SET_KEY_CTR_FN(ks, HWAES_set_encrypt_key, HWAES_encrypt, NULL);
  33 #  endif /* HWAES_ctr32_encrypt_blocks */
  34     } else
  35 # endif /* HWAES_CAPABLE */
  36
  37 # ifdef BSAES_CAPABLE
  38     if (BSAES_CAPABLE) {
  39         GCM_HW_SET_KEY_CTR_FN(ks, AES_set_encrypt_key, AES_encrypt,
  40                               bsaes_ctr32_encrypt_blocks);
  41     } else
  42 # endif /* BSAES_CAPABLE */
  43
  44 # ifdef VPAES_CAPABLE
  45     if (VPAES_CAPABLE) {
  46         GCM_HW_SET_KEY_CTR_FN(ks, vpaes_set_encrypt_key, vpaes_encrypt, NULL);
  47     } else
  48 # endif /* VPAES_CAPABLE */
  49
  50     {
  51 # ifdef AES_CTR_ASM
  52         GCM_HW_SET_KEY_CTR_FN(ks, AES_set_encrypt_key, AES_encrypt,
  53                               AES_ctr32_encrypt);
  54 # else
  55         GCM_HW_SET_KEY_CTR_FN(ks, AES_set_encrypt_key, AES_encrypt, NULL);
  56 # endif /* AES_CTR_ASM */
  57     }
  58     ctx->key_set = 1;
  59     return 1;
  60 }
  61
  62 static const PROV_GCM_HW aes_gcm = {
  63     generic_aes_gcm_initkey,
  64     gcm_setiv,
  65     gcm_aad_update,
  66     gcm_cipher_update,
  67     gcm_cipher_final,
  68     gcm_one_shot
  69 };
  70
  71 #if defined(S390X_aes_128_CAPABLE)
  72 # include "cipher_aes_gcm_hw_s390x.inc"
  73 #elif defined(AESNI_CAPABLE)
  74 # include "cipher_aes_gcm_hw_aesni.inc"
  75 #elif defined(SPARC_AES_CAPABLE)
  76 # include "cipher_aes_gcm_hw_t4.inc"
  77 #elif defined(AES_PMULL_CAPABLE) && defined(AES_GCM_ASM)
  78 # include "cipher_aes_gcm_hw_armv8.inc"
  79 #else
  80 const PROV_GCM_HW *PROV_AES_HW_gcm(size_t keybits)
  81 {
  82     return &aes_gcm;
  83 }
  84 #endif
  85