1 /*
2  * Copyright 2022-2023 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 #include <crypto/sm4.h>
11 #include "prov/ciphercommon.h"
12 #include "crypto/sm4_platform.h"
13 
14 PROV_CIPHER_FUNC(void, xts_stream,
15                  (const unsigned char *in, unsigned char *out, size_t len,
16                   const SM4_KEY *key1, const SM4_KEY *key2,
17                   const unsigned char iv[16], const int enc));
18 
19 typedef struct prov_sm4_xts_ctx_st {
20     /* Must be first */
21     PROV_CIPHER_CTX base;
22 
23     /* SM4 key schedules to use */
24     union {
25         OSSL_UNION_ALIGN;
26         SM4_KEY ks;
27     } ks1, ks2;
28 
29     /*-
30      * XTS standard to use with SM4-XTS algorithm
31      *
32      * Must be 0 or 1,
33      * 0 for XTS mode specified by GB/T 17964-2021
34      * 1 for XTS mode specified by IEEE Std 1619-2007
35      */
36     int xts_standard;
37 
38     XTS128_CONTEXT xts;
39 
40     /* Stream function for XTS mode specified by GB/T 17964-2021 */
41     OSSL_xts_stream_fn stream_gb;
42     /* Stream function for XTS mode specified by IEEE Std 1619-2007 */
43     OSSL_xts_stream_fn stream;
44 } PROV_SM4_XTS_CTX;
45 
46 const PROV_CIPHER_HW *ossl_prov_cipher_hw_sm4_xts(size_t keybits);
47