1 /*
2  * Copyright 2019-2021 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 <openssl/aes.h>
11 #include "prov/ciphercommon.h"
12 #include "crypto/aes_platform.h"
13 
14 /*
15  * Available in cipher_fips.c, and compiled with different values depending
16  * on we're in the FIPS module or not.
17  */
18 extern const int ossl_aes_xts_allow_insecure_decrypt;
19 
20 PROV_CIPHER_FUNC(void, xts_stream,
21                  (const unsigned char *in, unsigned char *out, size_t len,
22                   const AES_KEY *key1, const AES_KEY *key2,
23                   const unsigned char iv[16]));
24 
25 #if defined(OPENSSL_CPUID_OBJ) && defined(__s390__)
26 typedef struct S390X_km_xts_params_st {
27     unsigned char key[64];
28     unsigned char tweak[16];
29     unsigned char nap[16];
30 } S390X_KM_XTS_PARAMS;
31 #endif
32 
33 typedef struct prov_aes_xts_ctx_st {
34     PROV_CIPHER_CTX base;      /* Must be first */
35     union {
36         OSSL_UNION_ALIGN;
37         AES_KEY ks;
38     } ks1, ks2;                /* AES key schedules to use */
39     XTS128_CONTEXT xts;
40     OSSL_xts_stream_fn stream;
41 
42     /* Platform specific data */
43     union {
44         int dummy;
45 #if defined(OPENSSL_CPUID_OBJ) && defined(__s390__)
46         struct {
47             union {
48                 OSSL_UNION_ALIGN;
49                 S390X_KM_XTS_PARAMS km;
50             } param;
51             size_t offset;
52             unsigned int fc;
53             unsigned int iv_set : 1;
54             unsigned int key_set : 1;
55         } s390x;
56 #endif
57     } plat;
58 } PROV_AES_XTS_CTX;
59 
60 const PROV_CIPHER_HW *ossl_prov_cipher_hw_aes_xts(size_t keybits);
61