1*e7be843bSPierre Pronchery /*
2*e7be843bSPierre Pronchery * Copyright 2022-2024 The OpenSSL Project Authors. All Rights Reserved.
3*e7be843bSPierre Pronchery *
4*e7be843bSPierre Pronchery * Licensed under the Apache License 2.0 (the "License"). You may not use
5*e7be843bSPierre Pronchery * this file except in compliance with the License. You can obtain a copy
6*e7be843bSPierre Pronchery * in the file LICENSE in the source distribution or at
7*e7be843bSPierre Pronchery * https://www.openssl.org/source/license.html
8*e7be843bSPierre Pronchery */
9*e7be843bSPierre Pronchery
10*e7be843bSPierre Pronchery #include "cipher_sm4_xts.h"
11*e7be843bSPierre Pronchery
12*e7be843bSPierre Pronchery #define XTS_SET_KEY_FN(fn_set_enc_key, fn_set_dec_key, \
13*e7be843bSPierre Pronchery fn_block_enc, fn_block_dec, \
14*e7be843bSPierre Pronchery fn_stream, fn_stream_gb) { \
15*e7be843bSPierre Pronchery size_t bytes = keylen / 2; \
16*e7be843bSPierre Pronchery \
17*e7be843bSPierre Pronchery if (ctx->enc) { \
18*e7be843bSPierre Pronchery fn_set_enc_key(key, &xctx->ks1.ks); \
19*e7be843bSPierre Pronchery xctx->xts.block1 = (block128_f)fn_block_enc; \
20*e7be843bSPierre Pronchery } else { \
21*e7be843bSPierre Pronchery fn_set_dec_key(key, &xctx->ks1.ks); \
22*e7be843bSPierre Pronchery xctx->xts.block1 = (block128_f)fn_block_dec; \
23*e7be843bSPierre Pronchery } \
24*e7be843bSPierre Pronchery fn_set_enc_key(key + bytes, &xctx->ks2.ks); \
25*e7be843bSPierre Pronchery xctx->xts.block2 = (block128_f)fn_block_enc; \
26*e7be843bSPierre Pronchery xctx->xts.key1 = &xctx->ks1; \
27*e7be843bSPierre Pronchery xctx->xts.key2 = &xctx->ks2; \
28*e7be843bSPierre Pronchery xctx->stream = fn_stream; \
29*e7be843bSPierre Pronchery xctx->stream_gb = fn_stream_gb; \
30*e7be843bSPierre Pronchery }
31*e7be843bSPierre Pronchery
cipher_hw_sm4_xts_generic_initkey(PROV_CIPHER_CTX * ctx,const unsigned char * key,size_t keylen)32*e7be843bSPierre Pronchery static int cipher_hw_sm4_xts_generic_initkey(PROV_CIPHER_CTX *ctx,
33*e7be843bSPierre Pronchery const unsigned char *key,
34*e7be843bSPierre Pronchery size_t keylen)
35*e7be843bSPierre Pronchery {
36*e7be843bSPierre Pronchery PROV_SM4_XTS_CTX *xctx = (PROV_SM4_XTS_CTX *)ctx;
37*e7be843bSPierre Pronchery OSSL_xts_stream_fn stream = NULL;
38*e7be843bSPierre Pronchery OSSL_xts_stream_fn stream_gb = NULL;
39*e7be843bSPierre Pronchery #ifdef HWSM4_CAPABLE
40*e7be843bSPierre Pronchery if (HWSM4_CAPABLE) {
41*e7be843bSPierre Pronchery XTS_SET_KEY_FN(HWSM4_set_encrypt_key, HWSM4_set_decrypt_key,
42*e7be843bSPierre Pronchery HWSM4_encrypt, HWSM4_decrypt, stream, stream_gb);
43*e7be843bSPierre Pronchery return 1;
44*e7be843bSPierre Pronchery } else
45*e7be843bSPierre Pronchery #endif /* HWSM4_CAPABLE */
46*e7be843bSPierre Pronchery #ifdef VPSM4_EX_CAPABLE
47*e7be843bSPierre Pronchery if (VPSM4_EX_CAPABLE) {
48*e7be843bSPierre Pronchery stream = vpsm4_ex_xts_encrypt;
49*e7be843bSPierre Pronchery stream_gb = vpsm4_ex_xts_encrypt_gb;
50*e7be843bSPierre Pronchery XTS_SET_KEY_FN(vpsm4_ex_set_encrypt_key, vpsm4_ex_set_decrypt_key,
51*e7be843bSPierre Pronchery vpsm4_ex_encrypt, vpsm4_ex_decrypt, stream, stream_gb);
52*e7be843bSPierre Pronchery return 1;
53*e7be843bSPierre Pronchery } else
54*e7be843bSPierre Pronchery #endif /* VPSM4_EX_CAPABLE */
55*e7be843bSPierre Pronchery #ifdef VPSM4_CAPABLE
56*e7be843bSPierre Pronchery if (VPSM4_CAPABLE) {
57*e7be843bSPierre Pronchery stream = vpsm4_xts_encrypt;
58*e7be843bSPierre Pronchery stream_gb = vpsm4_xts_encrypt_gb;
59*e7be843bSPierre Pronchery XTS_SET_KEY_FN(vpsm4_set_encrypt_key, vpsm4_set_decrypt_key,
60*e7be843bSPierre Pronchery vpsm4_encrypt, vpsm4_decrypt, stream, stream_gb);
61*e7be843bSPierre Pronchery return 1;
62*e7be843bSPierre Pronchery } else
63*e7be843bSPierre Pronchery #endif /* VPSM4_CAPABLE */
64*e7be843bSPierre Pronchery {
65*e7be843bSPierre Pronchery (void)0;
66*e7be843bSPierre Pronchery }
67*e7be843bSPierre Pronchery {
68*e7be843bSPierre Pronchery XTS_SET_KEY_FN(ossl_sm4_set_key, ossl_sm4_set_key, ossl_sm4_encrypt,
69*e7be843bSPierre Pronchery ossl_sm4_decrypt, stream, stream_gb);
70*e7be843bSPierre Pronchery }
71*e7be843bSPierre Pronchery return 1;
72*e7be843bSPierre Pronchery }
73*e7be843bSPierre Pronchery
cipher_hw_sm4_xts_copyctx(PROV_CIPHER_CTX * dst,const PROV_CIPHER_CTX * src)74*e7be843bSPierre Pronchery static void cipher_hw_sm4_xts_copyctx(PROV_CIPHER_CTX *dst,
75*e7be843bSPierre Pronchery const PROV_CIPHER_CTX *src)
76*e7be843bSPierre Pronchery {
77*e7be843bSPierre Pronchery PROV_SM4_XTS_CTX *sctx = (PROV_SM4_XTS_CTX *)src;
78*e7be843bSPierre Pronchery PROV_SM4_XTS_CTX *dctx = (PROV_SM4_XTS_CTX *)dst;
79*e7be843bSPierre Pronchery
80*e7be843bSPierre Pronchery *dctx = *sctx;
81*e7be843bSPierre Pronchery dctx->xts.key1 = &dctx->ks1.ks;
82*e7be843bSPierre Pronchery dctx->xts.key2 = &dctx->ks2.ks;
83*e7be843bSPierre Pronchery }
84*e7be843bSPierre Pronchery
85*e7be843bSPierre Pronchery
86*e7be843bSPierre Pronchery static const PROV_CIPHER_HW sm4_generic_xts = {
87*e7be843bSPierre Pronchery cipher_hw_sm4_xts_generic_initkey,
88*e7be843bSPierre Pronchery NULL,
89*e7be843bSPierre Pronchery cipher_hw_sm4_xts_copyctx
90*e7be843bSPierre Pronchery };
91*e7be843bSPierre Pronchery
92*e7be843bSPierre Pronchery #if defined(OPENSSL_CPUID_OBJ) && defined(__riscv) && __riscv_xlen == 64
93*e7be843bSPierre Pronchery # include "cipher_sm4_xts_hw_rv64i.inc"
94*e7be843bSPierre Pronchery #else
ossl_prov_cipher_hw_sm4_xts(size_t keybits)95*e7be843bSPierre Pronchery const PROV_CIPHER_HW *ossl_prov_cipher_hw_sm4_xts(size_t keybits)
96*e7be843bSPierre Pronchery {
97*e7be843bSPierre Pronchery return &sm4_generic_xts;
98*e7be843bSPierre Pronchery }
99*e7be843bSPierre Pronchery #endif
100