providers/implementations/ciphers/cipher_aes_ccm_hw.c

   1 /*
   2  * Copyright 2019-2021 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 /* AES CCM 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_ccm.h"
  19
  20 #define AES_HW_CCM_SET_KEY_FN(fn_set_enc_key, fn_blk, fn_ccm_enc, fn_ccm_dec)  \
  21     fn_set_enc_key(key, keylen * 8, &actx->ccm.ks.ks);                         \
  22     CRYPTO_ccm128_init(&ctx->ccm_ctx, ctx->m, ctx->l, &actx->ccm.ks.ks,        \
  23                        (block128_f)fn_blk);                                    \
  24     ctx->str = ctx->enc ? (ccm128_f)fn_ccm_enc : (ccm128_f)fn_ccm_dec;         \
  25     ctx->key_set = 1;
  26
  27 static int ccm_generic_aes_initkey(PROV_CCM_CTX *ctx, const unsigned char *key,
  28                                    size_t keylen)
  29 {
  30     PROV_AES_CCM_CTX *actx = (PROV_AES_CCM_CTX *)ctx;
  31
  32 #ifdef HWAES_CAPABLE
  33     if (HWAES_CAPABLE) {
  34         AES_HW_CCM_SET_KEY_FN(HWAES_set_encrypt_key, HWAES_encrypt, NULL, NULL);
  35     } else
  36 #endif /* HWAES_CAPABLE */
  37
  38 #ifdef VPAES_CAPABLE
  39     if (VPAES_CAPABLE) {
  40         AES_HW_CCM_SET_KEY_FN(vpaes_set_encrypt_key, vpaes_encrypt, NULL, NULL);
  41     } else
  42 #endif
  43     {
  44         AES_HW_CCM_SET_KEY_FN(AES_set_encrypt_key, AES_encrypt, NULL, NULL)
  45     }
  46     return 1;
  47 }
  48
  49 static const PROV_CCM_HW aes_ccm = {
  50     ccm_generic_aes_initkey,
  51     ossl_ccm_generic_setiv,
  52     ossl_ccm_generic_setaad,
  53     ossl_ccm_generic_auth_encrypt,
  54     ossl_ccm_generic_auth_decrypt,
  55     ossl_ccm_generic_gettag
  56 };
  57
  58 #if defined(S390X_aes_128_CAPABLE)
  59 # include "cipher_aes_ccm_hw_s390x.inc"
  60 #elif defined(AESNI_CAPABLE)
  61 # include "cipher_aes_ccm_hw_aesni.inc"
  62 #elif defined(SPARC_AES_CAPABLE)
  63 # include "cipher_aes_ccm_hw_t4.inc"
  64 #else
  65 const PROV_CCM_HW *ossl_prov_aes_hw_ccm(size_t keybits)
  66 {
  67     return &aes_ccm;
  68 }
  69 #endif