1 /*
2 * Copyright 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 /*-
11 * Generic support for SM4 CCM.
12 */
13
14 #include "cipher_sm4_ccm.h"
15
ccm_sm4_initkey(PROV_CCM_CTX * ctx,const unsigned char * key,size_t keylen)16 static int ccm_sm4_initkey(PROV_CCM_CTX *ctx,
17 const unsigned char *key, size_t keylen)
18 {
19 PROV_SM4_CCM_CTX *actx = (PROV_SM4_CCM_CTX *)ctx;
20
21 ossl_sm4_set_key(key, &actx->ks.ks);
22 CRYPTO_ccm128_init(&ctx->ccm_ctx, ctx->m, ctx->l, &actx->ks.ks,
23 (block128_f)ossl_sm4_encrypt);
24 ctx->str = NULL;
25 ctx->key_set = 1;
26 return 1;
27 }
28
29 static const PROV_CCM_HW ccm_sm4 = {
30 ccm_sm4_initkey,
31 ossl_ccm_generic_setiv,
32 ossl_ccm_generic_setaad,
33 ossl_ccm_generic_auth_encrypt,
34 ossl_ccm_generic_auth_decrypt,
35 ossl_ccm_generic_gettag
36 };
37
ossl_prov_sm4_hw_ccm(size_t keybits)38 const PROV_CCM_HW *ossl_prov_sm4_hw_ccm(size_t keybits)
39 {
40 return &ccm_sm4;
41 }
42