60 lines
1.6 KiB
C
60 lines
1.6 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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/* Dispatch functions for SM4 CCM mode */
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/*
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* This file uses the low level SM4 functions (which are deprecated for
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* non-internal use) in order to implement provider SM4 ciphers.
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*/
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#include "internal/deprecated.h"
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#include "cipher_sm4_ccm.h"
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#include "crypto/sm4_platform.h"
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static int sm4_ccm_initkey(PROV_CCM_CTX *ctx, const unsigned char *key,
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size_t keylen)
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{
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PROV_SM4_CCM_CTX *actx = (PROV_SM4_CCM_CTX *)ctx;
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SM4_KEY *ks = &actx->ks.ks;
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# ifdef HWSM4_CAPABLE
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if (HWSM4_CAPABLE) {
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HWSM4_set_encrypt_key(key, ks);
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CRYPTO_ccm128_init(&ctx->ccm_ctx, ctx->m, ctx->l, &actx->ks.ks,
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(block128_f) HWSM4_encrypt);
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ctx->str = (ccm128_f)NULL;
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} else
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# endif /* HWSM4_CAPABLE */
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{
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ossl_sm4_set_key(key, ks);
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CRYPTO_ccm128_init(&ctx->ccm_ctx, ctx->m, ctx->l, &actx->ks.ks,
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(block128_f) ossl_sm4_encrypt);
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ctx->str = (ccm128_f)NULL;
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}
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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_CCM_HW sm4_ccm = {
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sm4_ccm_initkey,
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ossl_ccm_generic_setiv,
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ossl_ccm_generic_setaad,
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ossl_ccm_generic_auth_encrypt,
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ossl_ccm_generic_auth_decrypt,
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ossl_ccm_generic_gettag
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};
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const PROV_CCM_HW *ossl_prov_sm4_hw_ccm(size_t keybits)
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{
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return &sm4_ccm;
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}
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