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c2ee608a | 1 | /* |
556009c5 | 2 | * Copyright 2021-2023 The OpenSSL Project Authors. All Rights Reserved. |
c2ee608a TZ |
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 SM4 GCM mode */ | |
11 | ||
12 | #include "cipher_sm4_gcm.h" | |
13 | #include "prov/implementations.h" | |
14 | #include "prov/providercommon.h" | |
15 | ||
16 | static OSSL_FUNC_cipher_freectx_fn sm4_gcm_freectx; | |
17 | ||
18 | static void *sm4_gcm_newctx(void *provctx, size_t keybits) | |
19 | { | |
20 | PROV_SM4_GCM_CTX *ctx; | |
21 | ||
22 | if (!ossl_prov_is_running()) | |
23 | return NULL; | |
24 | ||
25 | ctx = OPENSSL_zalloc(sizeof(*ctx)); | |
26 | if (ctx != NULL) | |
27 | ossl_gcm_initctx(provctx, &ctx->base, keybits, | |
28 | ossl_prov_sm4_hw_gcm(keybits)); | |
29 | return ctx; | |
30 | } | |
31 | ||
0239fb3d NH |
32 | static void *sm4_gcm_dupctx(void *provctx) |
33 | { | |
34 | PROV_SM4_GCM_CTX *ctx = provctx; | |
0ca5cf98 | 35 | PROV_SM4_GCM_CTX *dctx = NULL; |
0239fb3d NH |
36 | |
37 | if (ctx == NULL) | |
38 | return NULL; | |
0ca5cf98 NH |
39 | |
40 | dctx = OPENSSL_memdup(ctx, sizeof(*ctx)); | |
41 | if (dctx != NULL && dctx->base.gcm.key != NULL) | |
42 | dctx->base.gcm.key = &dctx->ks.ks; | |
43 | ||
44 | return dctx; | |
0239fb3d NH |
45 | } |
46 | ||
c2ee608a TZ |
47 | static void sm4_gcm_freectx(void *vctx) |
48 | { | |
49 | PROV_SM4_GCM_CTX *ctx = (PROV_SM4_GCM_CTX *)vctx; | |
50 | ||
51 | OPENSSL_clear_free(ctx, sizeof(*ctx)); | |
52 | } | |
53 | ||
54 | /* ossl_sm4128gcm_functions */ | |
55 | IMPLEMENT_aead_cipher(sm4, gcm, GCM, AEAD_FLAGS, 128, 8, 96); |