library/psa_crypto_invasive.h

/**
 * \file psa_crypto_invasive.h
 *
 * \brief PSA cryptography module: invasive interfaces for test only.
 *
 * The interfaces in this file are intended for testing purposes only.
 * They MUST NOT be made available to clients over IPC in integrations
 * with isolation, and they SHOULD NOT be made available in library
 * integrations except when building the library for testing.
 */
/*
 *  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_INVASIVE_H
#define PSA_CRYPTO_INVASIVE_H

#if defined(MBEDTLS_CONFIG_FILE)
#include MBEDTLS_CONFIG_FILE
#else
#include "mbedtls/config.h"
#endif

#include "psa/crypto.h"

#include "mbedtls/entropy.h"

#if !defined(MBEDTLS_PSA_CRYPTO_EXTERNAL_RNG)
/** \brief Configure entropy sources.
 *
 * This function may only be called before a call to psa_crypto_init(),
 * or after a call to mbedtls_psa_crypto_free() and before any
 * subsequent call to psa_crypto_init().
 *
 * This function is only intended for test purposes. The functionality
 * it provides is also useful for system integrators, but
 * system integrators should configure entropy drivers instead of
 * breaking through to the Mbed TLS API.
 *
 * \param entropy_init  Function to initialize the entropy context
 *                      and set up the desired entropy sources.
 *                      It is called by psa_crypto_init().
 *                      By default this is mbedtls_entropy_init().
 *                      This function cannot report failures directly.
 *                      To indicate a failure, set the entropy context
 *                      to a state where mbedtls_entropy_func() will
 *                      return an error.
 * \param entropy_free  Function to free the entropy context
 *                      and associated resources.
 *                      It is called by mbedtls_psa_crypto_free().
 *                      By default this is mbedtls_entropy_free().
 *
 * \retval #PSA_SUCCESS
 *         Success.
 * \retval #PSA_ERROR_NOT_PERMITTED
 *         The caller does not have the permission to configure
 *         entropy sources.
 * \retval #PSA_ERROR_BAD_STATE
 *         The library has already been initialized.
 */
psa_status_t mbedtls_psa_crypto_configure_entropy_sources(
    void (* entropy_init )( mbedtls_entropy_context *ctx ),
    void (* entropy_free )( mbedtls_entropy_context *ctx ) );
#endif /* !defined(MBEDTLS_PSA_CRYPTO_EXTERNAL_RNG) */

#endif /* PSA_CRYPTO_INVASIVE_H */