include/psa/crypto_builtin_cipher.h

/*
 *  Context structure declaration of the software-based driver which performs
 *  cipher operations through the PSA Crypto driver dispatch layer.
 */
/*
 *  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_CIPHER_H
#define PSA_CRYPTO_BUILTIN_CIPHER_H

#include <psa/crypto_driver_common.h>
#include "mbedtls/cipher.h"

#if defined(MBEDTLS_PSA_BUILTIN_ALG_STREAM_CIPHER) || \
    defined(MBEDTLS_PSA_BUILTIN_ALG_CTR) || \
    defined(MBEDTLS_PSA_BUILTIN_ALG_CFB) || \
    defined(MBEDTLS_PSA_BUILTIN_ALG_OFB) || \
    defined(MBEDTLS_PSA_BUILTIN_ALG_XTS) || \
    defined(MBEDTLS_PSA_BUILTIN_ALG_ECB_NO_PADDING) || \
    defined(MBEDTLS_PSA_BUILTIN_ALG_CBC_NO_PADDING) || \
    defined(MBEDTLS_PSA_BUILTIN_ALG_CBC_PKCS7)
#define MBEDTLS_PSA_BUILTIN_CIPHER  1
#endif

typedef struct {
    /* Context structure for the Mbed TLS cipher implementation. */
    psa_algorithm_t alg;
    uint8_t iv_length;
    uint8_t block_length;
    mbedtls_cipher_context_t cipher;
} mbedtls_psa_cipher_operation_t;

#define MBEDTLS_PSA_CIPHER_OPERATION_INIT {0, 0, 0, {0}}

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

typedef mbedtls_psa_cipher_operation_t
        mbedtls_transparent_test_driver_cipher_operation_t;

typedef struct {
    unsigned int initialised : 1;
    mbedtls_transparent_test_driver_cipher_operation_t ctx;
} mbedtls_opaque_test_driver_cipher_operation_t;

#define MBEDTLS_TRANSPARENT_TEST_DRIVER_CIPHER_OPERATION_INIT \
     MBEDTLS_PSA_CIPHER_OPERATION_INIT

#define MBEDTLS_OPAQUE_TEST_DRIVER_CIPHER_OPERATION_INIT \
     { 0, MBEDTLS_TRANSPARENT_TEST_DRIVER_CIPHER_OPERATION_INIT }

#endif /* PSA_CRYPTO_DRIVER_TEST */

#endif /* PSA_CRYPTO_BUILTIN_CIPHER_H */