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      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 
     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
     65 const PROV_CCM_HW *ossl_prov_sm4_hw_ccm(size_t keybits)
     66 {
     67     return &ccm_sm4;
     68 }
     69 #endif
     70