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_xts_initkey(PROV_CIPHER_CTX *ctx,
16                                        const unsigned char *key,
17                                        size_t keylen)
18{
19    PROV_SM4_XTS_CTX *xctx = (PROV_SM4_XTS_CTX *)ctx;
20    OSSL_xts_stream_fn stream_fn = NULL;
21    OSSL_xts_stream_fn stream_gb_fn = NULL;
22
23    XTS_SET_KEY_FN(rv64i_zvksed_sm4_set_encrypt_key,
24                   rv64i_zvksed_sm4_set_decrypt_key,
25                   rv64i_zvksed_sm4_encrypt,
26                   rv64i_zvksed_sm4_decrypt,
27                   stream_fn, stream_gb_fn);
28    return 1;
29}
30
31static const PROV_CIPHER_HW rv64i_zvksed_sm4_xts = {
32    rv64i_zvksed_sm4_xts_initkey,
33    NULL,
34    cipher_hw_sm4_xts_copyctx
35};
36
37const PROV_CIPHER_HW *ossl_prov_cipher_hw_sm4_xts(size_t keybits)
38{
39    if (RISCV_HAS_ZVKB_AND_ZVKSED() && riscv_vlen() >= 128)
40        return &rv64i_zvksed_sm4_xts;
41    else
42        return &sm4_generic_xts;
43}
44