1/*
2 * Copyright 2001-2022 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_aes_gcm_hw.c
13 */
14
15static 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
25static const PROV_GCM_HW aesni_gcm = {
26    aesni_gcm_initkey,
27    ossl_gcm_setiv,
28    ossl_gcm_aad_update,
29    generic_aes_gcm_cipher_update,
30    ossl_gcm_cipher_final,
31    ossl_gcm_one_shot
32};
33
34#include "cipher_aes_gcm_hw_vaes_avx512.inc"
35
36const PROV_GCM_HW *ossl_prov_aes_hw_gcm(size_t keybits)
37{
38#ifdef VAES_GCM_ENABLED
39    if (ossl_vaes_vpclmulqdq_capable())
40        return &vaes_gcm;
41    else
42#endif
43    if (AESNI_CAPABLE)
44        return &aesni_gcm;
45    else
46        return &aes_gcm;
47}
48