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      1 /*
      2  * Copyright 2019-2020 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 /* Dispatch functions for cast cipher modes ecb, cbc, ofb, cfb */
     11 
     12 #include "cipher_sm4.h"
     13 #include "prov/implementations.h"
     14 #include "prov/providercommon.h"
     15 
     16 static OSSL_FUNC_cipher_freectx_fn sm4_freectx;
     17 static OSSL_FUNC_cipher_dupctx_fn sm4_dupctx;
     18 
     19 static void sm4_freectx(void *vctx)
     20 {
     21     PROV_SM4_CTX *ctx = (PROV_SM4_CTX *)vctx;
     22 
     23     ossl_cipher_generic_reset_ctx((PROV_CIPHER_CTX *)vctx);
     24     OPENSSL_clear_free(ctx,  sizeof(*ctx));
     25 }
     26 
     27 static void *sm4_dupctx(void *ctx)
     28 {
     29     PROV_SM4_CTX *in = (PROV_SM4_CTX *)ctx;
     30     PROV_SM4_CTX *ret;
     31 
     32     if (!ossl_prov_is_running())
     33         return NULL;
     34 
     35     ret = OPENSSL_malloc(sizeof(*ret));
     36     if (ret == NULL) {
     37         ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE);
     38         return NULL;
     39     }
     40     in->base.hw->copyctx(&ret->base, &in->base);
     41 
     42     return ret;
     43 }
     44 
     45 /* ossl_sm4128ecb_functions */
     46 IMPLEMENT_generic_cipher(sm4, SM4, ecb, ECB, 0, 128, 128, 0, block)
     47 /* ossl_sm4128cbc_functions */
     48 IMPLEMENT_generic_cipher(sm4, SM4, cbc, CBC, 0, 128, 128, 128, block)
     49 /* ossl_sm4128ctr_functions */
     50 IMPLEMENT_generic_cipher(sm4, SM4, ctr, CTR, 0, 128, 8, 128, stream)
     51 /* ossl_sm4128ofb128_functions */
     52 IMPLEMENT_generic_cipher(sm4, SM4, ofb128, OFB, 0, 128, 8, 128, stream)
     53 /* ossl_sm4128cfb128_functions */
     54 IMPLEMENT_generic_cipher(sm4, SM4, cfb128,  CFB, 0, 128, 8, 128, stream)
     55