1/*
2 * Copyright 2023 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 * RISC-V 64 ZVKSED support for SM4 GCM.
12 * This file is included by cipher_sm4_gcm_hw.c
13 */
14
15static int rv64i_zvksed_sm4_gcm_initkey(PROV_GCM_CTX *ctx,
16                                        const unsigned char *key,
17                                        size_t keylen)
18{
19    PROV_SM4_GCM_CTX *actx = (PROV_SM4_GCM_CTX *)ctx;
20    SM4_KEY *ks = &actx->ks.ks;
21
22    SM4_GCM_HW_SET_KEY_CTR_FN(ks, rv64i_zvksed_sm4_set_encrypt_key,
23                              rv64i_zvksed_sm4_encrypt, NULL);
24    return 1;
25}
26
27static const PROV_GCM_HW rv64i_zvksed_sm4_gcm = {
28    rv64i_zvksed_sm4_gcm_initkey,
29    ossl_gcm_setiv,
30    ossl_gcm_aad_update,
31    hw_gcm_cipher_update,
32    ossl_gcm_cipher_final,
33    ossl_gcm_one_shot
34};
35
36const PROV_GCM_HW *ossl_prov_sm4_hw_gcm(size_t keybits)
37{
38    if (RISCV_HAS_ZVKB_AND_ZVKSED() && riscv_vlen() >= 128)
39        return &rv64i_zvksed_sm4_gcm;
40    else
41        return &sm4_gcm;
42}
43