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