providers/implementations/ciphers/cipher_sm4_xts.h

   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);