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47 lines
1.6 KiB
C
47 lines
1.6 KiB
C
/**
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* \file utils.h
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*
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* \brief Mbed TLS utility functions
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*
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* Copyright (C) 2018, Arm Limited, All Rights Reserved
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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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* This file is part of Mbed TLS (https://tls.mbed.org)
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*/
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#ifndef MBEDTLS_UTILS_H
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#define MBEDTLS_UTILS_H
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#include <stddef.h>
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/**
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* \brief Securely zeroize a buffer
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*
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* \param buf Buffer to be zeroized
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* \param len Length of the buffer in bytes
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*
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* \note This implementation should never be optimized out by the
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* compiler
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*
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* \note It is extremely difficult to guarantee that calls to
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* mbedtls_zeroize() are not removed by aggressive compiler
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* optimizations in a portable way. For this reason, Mbed TLS
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* provides the configuration option MBEDTLS_UTILS_ZEROIZE_ALT,
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* which allows users to configure mbedtls_zeroize() to use a
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* suitable implementation for their platform and needs
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*/
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void mbedtls_zeroize( void *buf, size_t len );
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#endif /* MBEDTLS_UTILS_H */
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