1 /*
2  * Copyright 2021-2024 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 /*-
11  * Generic support for SM4 CCM.
12  */
13 
14 #include "cipher_sm4_ccm.h"
15 #include "crypto/sm4_platform.h"
16 
17 #define SM4_HW_CCM_SET_KEY_FN(fn_set_enc_key, fn_blk, fn_ccm_enc, fn_ccm_dec)  \
18     fn_set_enc_key(key, &actx->ks.ks);                                         \
19     CRYPTO_ccm128_init(&ctx->ccm_ctx, ctx->m, ctx->l, &actx->ks.ks,            \
20                        (block128_f)fn_blk);                                    \
21     ctx->str = ctx->enc ? (ccm128_f)fn_ccm_enc : (ccm128_f)fn_ccm_dec;         \
22     ctx->key_set = 1;
23 
ccm_sm4_initkey(PROV_CCM_CTX * ctx,const unsigned char * key,size_t keylen)24 static int ccm_sm4_initkey(PROV_CCM_CTX *ctx,
25                            const unsigned char *key, size_t keylen)
26 {
27     PROV_SM4_CCM_CTX *actx = (PROV_SM4_CCM_CTX *)ctx;
28 
29 #ifdef HWSM4_CAPABLE
30     if (HWSM4_CAPABLE) {
31         SM4_HW_CCM_SET_KEY_FN(HWSM4_set_encrypt_key, HWSM4_encrypt, NULL, NULL);
32     } else
33 #endif /* HWSM4_CAPABLE */
34 
35 #ifdef VPSM4_EX_CAPABLE
36     if (VPSM4_EX_CAPABLE) {
37         SM4_HW_CCM_SET_KEY_FN(vpsm4_ex_set_encrypt_key, vpsm4_ex_encrypt, NULL,
38                               NULL);
39     } else
40 #endif /* VPSM4_EX_CAPABLE */
41 
42 #ifdef VPSM4_CAPABLE
43     if (VPSM4_CAPABLE) {
44         SM4_HW_CCM_SET_KEY_FN(vpsm4_set_encrypt_key, vpsm4_encrypt, NULL, NULL);
45     } else
46 #endif /* VPSM4_CAPABLE */
47     {
48         SM4_HW_CCM_SET_KEY_FN(ossl_sm4_set_key, ossl_sm4_encrypt, NULL, NULL);
49     }
50   return 1;
51 }
52 
53 static const PROV_CCM_HW ccm_sm4 = {
54     ccm_sm4_initkey,
55     ossl_ccm_generic_setiv,
56     ossl_ccm_generic_setaad,
57     ossl_ccm_generic_auth_encrypt,
58     ossl_ccm_generic_auth_decrypt,
59     ossl_ccm_generic_gettag
60 };
61 
62 #if defined(OPENSSL_CPUID_OBJ) && defined(__riscv) && __riscv_xlen == 64
63 # include "cipher_sm4_ccm_hw_rv64i.inc"
64 #else
ossl_prov_sm4_hw_ccm(size_t keybits)65 const PROV_CCM_HW *ossl_prov_sm4_hw_ccm(size_t keybits)
66 {
67     return &ccm_sm4;
68 }
69 #endif
70