1 /*
2 * Copyright 2021-2023 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 /*-
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(__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
