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c2ee608a23
The GCM mode of the SM4 algorithm is specifieded by RFC8998. Signed-off-by: Tianjia Zhang <tianjia.zhang@linux.alibaba.com> Reviewed-by: Paul Yang <kaishen.yy@antfin.com> Reviewed-by: Paul Dale <pauli@openssl.org> (Merged from https://github.com/openssl/openssl/pull/16491)
44 lines
1.0 KiB
C
44 lines
1.0 KiB
C
/*
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* Copyright 2021 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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/*-
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* Generic support for SM4 GCM.
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*/
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#include "cipher_sm4_gcm.h"
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static int sm4_gcm_initkey(PROV_GCM_CTX *ctx, const unsigned char *key,
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size_t keylen)
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{
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PROV_SM4_GCM_CTX *actx = (PROV_SM4_GCM_CTX *)ctx;
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SM4_KEY *ks = &actx->ks.ks;
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ctx->ks = ks;
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ossl_sm4_set_key(key, ks);
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CRYPTO_gcm128_init(&ctx->gcm, ks, (block128_f)ossl_sm4_encrypt);
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ctx->ctr = (ctr128_f)NULL;
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ctx->key_set = 1;
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return 1;
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}
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static const PROV_GCM_HW sm4_gcm = {
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sm4_gcm_initkey,
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ossl_gcm_setiv,
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ossl_gcm_aad_update,
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ossl_gcm_cipher_update,
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ossl_gcm_cipher_final,
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ossl_gcm_one_shot
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};
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const PROV_GCM_HW *ossl_prov_sm4_hw_gcm(size_t keybits)
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{
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return &sm4_gcm;
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}
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