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      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