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
sm4_freectx(void * vctx)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
sm4_dupctx(void * ctx)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