providers/common/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_local.h"
  13 #include "internal/ciphers/cipher_gcm.h"
  14
  15 static int generic_aes_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
  21 # ifdef HWAES_CAPABLE
  22     if (HWAES_CAPABLE) {
  23 #  ifdef HWAES_ctr32_encrypt_blocks
  24         GCM_HW_SET_KEY_CTR_FN(ks, HWAES_set_encrypt_key, HWAES_encrypt,
  25                               HWAES_ctr32_encrypt_blocks);
  26 #  else
  27         GCM_HW_SET_KEY_CTR_FN(ks, HWAES_set_encrypt_key, HWAES_encrypt, NULL);
  28 #  endif /* HWAES_ctr32_encrypt_blocks */
  29     } else
  30 # endif /* HWAES_CAPABLE */
  31
  32 # ifdef BSAES_CAPABLE
  33     if (BSAES_CAPABLE) {
  34         GCM_HW_SET_KEY_CTR_FN(ks, AES_set_encrypt_key, AES_encrypt,
  35                               bsaes_ctr32_encrypt_blocks);
  36     } else
  37 # endif /* BSAES_CAPABLE */
  38
  39 # ifdef VPAES_CAPABLE
  40     if (VPAES_CAPABLE) {
  41         GCM_HW_SET_KEY_CTR_FN(ks, vpaes_set_encrypt_key, vpaes_encrypt, NULL);
  42     } else
  43 # endif /* VPAES_CAPABLE */
  44
  45     {
  46 # ifdef AES_CTR_ASM
  47         GCM_HW_SET_KEY_CTR_FN(ks, AES_set_encrypt_key, AES_encrypt,
  48                               AES_ctr32_encrypt);
  49 # else
  50         GCM_HW_SET_KEY_CTR_FN(ks, AES_set_encrypt_key, AES_encrypt, NULL);
  51 # endif /* AES_CTR_ASM */
  52     }
  53     ctx->key_set = 1;
  54     return 1;
  55 }
  56
  57 static const PROV_GCM_HW aes_gcm = {
  58     generic_aes_gcm_initkey,
  59     gcm_setiv,
  60     gcm_aad_update,
  61     gcm_cipher_update,
  62     gcm_cipher_final,
  63     gcm_one_shot
  64 };
  65
  66 #if defined(S390X_aes_128_CAPABLE)
  67 # include "cipher_aes_gcm_hw_s390x.inc"
  68 #elif defined(AESNI_CAPABLE)
  69 # include "cipher_aes_gcm_hw_aesni.inc"
  70 #elif defined(SPARC_AES_CAPABLE)
  71 # include "cipher_aes_gcm_hw_t4.inc"
  72 #else
  73 const PROV_GCM_HW *PROV_AES_HW_gcm(size_t keybits)
  74 {
  75     return &aes_gcm;
  76 }
  77 #endif
  78