4fc21fdeb6
Implement support for MBEDTLS_PSA_CRYPTO_EXTERNAL_RNG. For test purposes, write an implementation that uses libc rand(). Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
79 lines
3 KiB
C
79 lines
3 KiB
C
/**
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* \file psa_crypto_invasive.h
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*
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* \brief PSA cryptography module: invasive interfaces for test only.
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*
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* The interfaces in this file are intended for testing purposes only.
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* They MUST NOT be made available to clients over IPC in integrations
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* with isolation, and they SHOULD NOT be made available in library
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* integrations except when building the library for testing.
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*/
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/*
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* Copyright The Mbed TLS Contributors
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed under the Apache License, Version 2.0 (the "License"); you may
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* not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef PSA_CRYPTO_INVASIVE_H
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#define PSA_CRYPTO_INVASIVE_H
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#if defined(MBEDTLS_CONFIG_FILE)
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#include MBEDTLS_CONFIG_FILE
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#else
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#include "mbedtls/config.h"
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#endif
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#include "psa/crypto.h"
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#include "mbedtls/entropy.h"
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#if !defined(MBEDTLS_PSA_CRYPTO_EXTERNAL_RNG)
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/** \brief Configure entropy sources.
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*
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* This function may only be called before a call to psa_crypto_init(),
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* or after a call to mbedtls_psa_crypto_free() and before any
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* subsequent call to psa_crypto_init().
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*
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* This function is only intended for test purposes. The functionality
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* it provides is also useful for system integrators, but
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* system integrators should configure entropy drivers instead of
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* breaking through to the Mbed TLS API.
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*
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* \param entropy_init Function to initialize the entropy context
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* and set up the desired entropy sources.
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* It is called by psa_crypto_init().
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* By default this is mbedtls_entropy_init().
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* This function cannot report failures directly.
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* To indicate a failure, set the entropy context
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* to a state where mbedtls_entropy_func() will
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* return an error.
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* \param entropy_free Function to free the entropy context
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* and associated resources.
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* It is called by mbedtls_psa_crypto_free().
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* By default this is mbedtls_entropy_free().
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*
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* \retval #PSA_SUCCESS
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* Success.
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* \retval #PSA_ERROR_NOT_PERMITTED
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* The caller does not have the permission to configure
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* entropy sources.
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* \retval #PSA_ERROR_BAD_STATE
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* The library has already been initialized.
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*/
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psa_status_t mbedtls_psa_crypto_configure_entropy_sources(
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void (* entropy_init )( mbedtls_entropy_context *ctx ),
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void (* entropy_free )( mbedtls_entropy_context *ctx ) );
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#endif /* !defined(MBEDTLS_PSA_CRYPTO_EXTERNAL_RNG) */
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#endif /* PSA_CRYPTO_INVASIVE_H */
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