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56 lines
1.4 KiB
C
56 lines
1.4 KiB
C
/*
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* Copyright 2021-2023 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the Apache License 2.0 (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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/* Dispatch functions for SM4 GCM mode */
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#include "cipher_sm4_gcm.h"
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#include "prov/implementations.h"
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#include "prov/providercommon.h"
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static OSSL_FUNC_cipher_freectx_fn sm4_gcm_freectx;
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static void *sm4_gcm_newctx(void *provctx, size_t keybits)
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{
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PROV_SM4_GCM_CTX *ctx;
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if (!ossl_prov_is_running())
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return NULL;
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ctx = OPENSSL_zalloc(sizeof(*ctx));
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if (ctx != NULL)
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ossl_gcm_initctx(provctx, &ctx->base, keybits,
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ossl_prov_sm4_hw_gcm(keybits));
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return ctx;
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}
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static void *sm4_gcm_dupctx(void *provctx)
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{
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PROV_SM4_GCM_CTX *ctx = provctx;
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PROV_SM4_GCM_CTX *dctx = NULL;
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if (ctx == NULL)
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return NULL;
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dctx = OPENSSL_memdup(ctx, sizeof(*ctx));
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if (dctx != NULL && dctx->base.gcm.key != NULL)
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dctx->base.gcm.key = &dctx->ks.ks;
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return dctx;
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}
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static void sm4_gcm_freectx(void *vctx)
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{
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PROV_SM4_GCM_CTX *ctx = (PROV_SM4_GCM_CTX *)vctx;
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OPENSSL_clear_free(ctx, sizeof(*ctx));
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}
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/* ossl_sm4128gcm_functions */
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IMPLEMENT_aead_cipher(sm4, gcm, GCM, AEAD_FLAGS, 128, 8, 96);
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