include/psa/crypto_builtin_composites.h

/*
 *  Context structure declaration of the Mbed TLS software-based PSA drivers
 *  called through the PSA Crypto driver dispatch layer.
 *  This file contains the context structures of those algorithms which need to
 *  rely on other algorithms, i.e. are 'composite' algorithms.
 *
 * \note This file may not be included directly. Applications must
 * include psa/crypto.h.
 *
 * \note This header and its content is not part of the Mbed TLS API and
 * applications must not depend on it. Its main purpose is to define the
 * multi-part state objects of the Mbed TLS software-based PSA drivers. The
 * definition of these objects are then used by crypto_struct.h to define the
 * implementation-defined types of PSA multi-part state objects.
 */
/*
 *  Copyright The Mbed TLS Contributors
 *  SPDX-License-Identifier: Apache-2.0
 *
 *  Licensed under the Apache License, Version 2.0 (the "License"); you may
 *  not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */

#ifndef PSA_CRYPTO_BUILTIN_COMPOSITES_H
#define PSA_CRYPTO_BUILTIN_COMPOSITES_H

#include <psa/crypto_driver_common.h>

/*
 * MAC multi-part operation definitions.
 */
#if defined(MBEDTLS_PSA_BUILTIN_ALG_CMAC) || \
    defined(MBEDTLS_PSA_BUILTIN_ALG_HMAC)
#define MBEDTLS_PSA_BUILTIN_MAC
#endif

#if defined(MBEDTLS_PSA_BUILTIN_ALG_HMAC) || defined(PSA_CRYPTO_DRIVER_TEST)
typedef struct
{
    /** The HMAC algorithm in use */
    psa_algorithm_t alg;
    /** The hash context. */
    struct psa_hash_operation_s hash_ctx;
    /** The HMAC part of the context. */
    uint8_t opad[PSA_HMAC_MAX_HASH_BLOCK_SIZE];
} mbedtls_psa_hmac_operation_t;

#define MBEDTLS_PSA_HMAC_OPERATION_INIT {0, PSA_HASH_OPERATION_INIT, {0}}
#endif /* MBEDTLS_PSA_BUILTIN_ALG_HMAC */

#include "mbedtls/cmac.h"

typedef struct
{
    psa_algorithm_t alg;
    union
    {
        unsigned dummy; /* Make the union non-empty even with no supported algorithms. */
#if defined(MBEDTLS_PSA_BUILTIN_ALG_HMAC) || defined(PSA_CRYPTO_DRIVER_TEST)
        mbedtls_psa_hmac_operation_t hmac;
#endif /* MBEDTLS_PSA_BUILTIN_ALG_HMAC */
#if defined(MBEDTLS_PSA_BUILTIN_ALG_CMAC) || defined(PSA_CRYPTO_DRIVER_TEST)
        mbedtls_cipher_context_t cmac;
#endif /* MBEDTLS_PSA_BUILTIN_ALG_CMAC */
    } ctx;
} mbedtls_psa_mac_operation_t;

#define MBEDTLS_PSA_MAC_OPERATION_INIT {0, {0}}

#if defined(MBEDTLS_PSA_BUILTIN_ALG_GCM) || \
    defined(MBEDTLS_PSA_BUILTIN_ALG_CCM) || \
    defined(MBEDTLS_PSA_BUILTIN_ALG_CHACHA20_POLY1305)
#define MBEDTLS_PSA_BUILTIN_AEAD  1
#endif

/* Context structure for the Mbed TLS AEAD implementation. */
typedef struct
{
    psa_algorithm_t alg;
    psa_key_type_t key_type;

    unsigned int is_encrypt : 1;
    unsigned int ad_started : 1;
    unsigned int body_started : 1;

    uint8_t tag_length;

    /* Buffers for AD/data - only required until CCM gets proper multipart
       support. */
    uint8_t *ad_buffer;
    size_t ad_length;

    uint8_t *body_buffer;
    size_t body_length;

    uint8_t *tag_buffer;

    /* buffer to store Nonce - only required until CCM and GCM get proper
       multipart support. */
    uint8_t *nonce;
    size_t nonce_length;

    union
    {
        unsigned dummy; /* Enable easier initializing of the union. */
#if defined(MBEDTLS_PSA_BUILTIN_ALG_CCM)
        mbedtls_ccm_context ccm;
#endif /* MBEDTLS_PSA_BUILTIN_ALG_CCM */
#if defined(MBEDTLS_PSA_BUILTIN_ALG_GCM)
        mbedtls_gcm_context gcm;
#endif /* MBEDTLS_PSA_BUILTIN_ALG_GCM */
#if defined(MBEDTLS_PSA_BUILTIN_ALG_CHACHA20_POLY1305)
        mbedtls_chachapoly_context chachapoly;
#endif /* MBEDTLS_PSA_BUILTIN_ALG_CHACHA20_POLY1305 */

    } ctx;

} mbedtls_psa_aead_operation_t;

#define MBEDTLS_PSA_AEAD_OPERATION_INIT {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, {0}}

/*
 * BEYOND THIS POINT, TEST DRIVER DECLARATIONS ONLY.
 */
#if defined(PSA_CRYPTO_DRIVER_TEST)

typedef mbedtls_psa_mac_operation_t mbedtls_transparent_test_driver_mac_operation_t;
typedef mbedtls_psa_mac_operation_t mbedtls_opaque_test_driver_mac_operation_t;

#define MBEDTLS_TRANSPARENT_TEST_DRIVER_MAC_OPERATION_INIT MBEDTLS_PSA_MAC_OPERATION_INIT
#define MBEDTLS_OPAQUE_TEST_DRIVER_MAC_OPERATION_INIT MBEDTLS_PSA_MAC_OPERATION_INIT

typedef mbedtls_psa_aead_operation_t mbedtls_transparent_test_driver_aead_operation_t;

#define MBEDTLS_TRANSPARENT_TEST_DRIVER_AEAD_OPERATION_INIT MBEDTLS_PSA_AEAD_OPERATION_INIT

#endif /* PSA_CRYPTO_DRIVER_TEST */

#endif /* PSA_CRYPTO_BUILTIN_COMPOSITES_H */