/*

 * Copyright 2019-2023 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

 */

/*

 * AES low level APIs are deprecated for public use, but still ok for internal

 * use where we're using them to implement the higher level EVP interface, as is

 * the case here.

 */

#include "internal/deprecated.h"

/* Dispatch functions for AES CCM mode */

#include "cipher_aes_ccm.h"

#include "prov/implementations.h"

#include "prov/providercommon.h"

static void *aes_ccm_newctx(void *provctx, size_t keybits)

{

    PROV_AES_CCM_CTX *ctx;

    if (!ossl_prov_is_running())

        return NULL;

    ctx = OPENSSL_zalloc(sizeof(*ctx));

    if (ctx != NULL)

        ossl_ccm_initctx(&ctx->base, keybits, ossl_prov_aes_hw_ccm(keybits));

    return ctx;

}

static void *aes_ccm_dupctx(void *provctx)

{

    PROV_AES_CCM_CTX *ctx = provctx;

    PROV_AES_CCM_CTX *dupctx = NULL;

    if (!ossl_prov_is_running())

        return NULL;

    if (ctx == NULL)

        return NULL;

    dupctx = OPENSSL_memdup(provctx, sizeof(*ctx));

    if (dupctx == NULL)

        return NULL;

    /*

     * ossl_cm_initctx, via the ossl_prov_aes_hw_ccm functions assign a

     * provctx->ccm.ks.ks to the ccm context key so we need to point it to

     * the memduped copy

     */

    dupctx->base.ccm_ctx.key = &dupctx->ccm.ks.ks;

    return dupctx;

}

static OSSL_FUNC_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));

}

/* ossl_aes128ccm_functions */

IMPLEMENT_aead_cipher(aes, ccm, CCM, AEAD_FLAGS, 128, 8, 96);

/* ossl_aes192ccm_functions */

IMPLEMENT_aead_cipher(aes, ccm, CCM, AEAD_FLAGS, 192, 8, 96);

/* ossl_aes256ccm_functions */

IMPLEMENT_aead_cipher(aes, ccm, CCM, AEAD_FLAGS, 256, 8, 96);