chunk 6 of CMP contribution to OpenSSL

[thirdparty/openssl.git] / providers / implementations / ciphers / cipher_aes_ccm.c

/*
 * Copyright 2019 The OpenSSL Project Authors. All Rights Reserved.
 *
 * Licensed under the Apache License 2.0 (the "License").  You may not use
 * this file except in compliance with the License.  You can obtain a copy
 * in the file LICENSE in the source distribution or at
 * https://www.openssl.org/source/license.html
 */

/* Dispatch functions for AES CCM mode */

#include "prov/ciphercommon.h"
#include "prov/ciphercommon_ccm.h"
#include "prov/implementations.h"

static void *aes_ccm_newctx(void *provctx, size_t keybits)
{
    PROV_AES_CCM_CTX *ctx = OPENSSL_zalloc(sizeof(*ctx));

    if (ctx != NULL)
        ccm_initctx(&ctx->base, keybits, PROV_AES_HW_ccm(keybits));
    return ctx;
}

static OSSL_OP_cipher_freectx_fn aes_ccm_freectx;
static void aes_ccm_freectx(void *vctx)
{
    PROV_AES_CCM_CTX *ctx = (PROV_AES_CCM_CTX *)vctx;

    OPENSSL_clear_free(ctx,  sizeof(*ctx));
}

/* aes128ccm_functions */
IMPLEMENT_aead_cipher(aes, ccm, CCM, AEAD_FLAGS, 128, 8, 96);
/* aes192ccm_functions */
IMPLEMENT_aead_cipher(aes, ccm, CCM, AEAD_FLAGS, 192, 8, 96);
/* aes256ccm_functions */
IMPLEMENT_aead_cipher(aes, ccm, CCM, AEAD_FLAGS, 256, 8, 96);