| /** |
| * \file utils.h |
| * |
| * \brief mbed TLS utility functions |
| * |
| * Copyright (C) 2017, ARM Limited, All Rights Reserved |
| * 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. |
| * |
| * This file is part of mbed TLS (https://tls.mbed.org) |
| */ |
| #ifndef MBEDTLS_UTILS_H |
| #define MBEDTLS_UTILS_H |
| |
| #include <stddef.h> |
| |
| /** |
| * \brief Securely zeroize a buffer |
| * |
| * \param buf Buffer to be zeroized |
| * \param len Length of the buffer in bytes |
| * |
| * \note This implementation should never be optimized out by the |
| * compiler |
| * |
| * \note It is extremely difficult to guarantee that calls to |
| * mbedtls_zeroize() are not removed by aggressive compiler |
| * optimizations in a portable way. For this reason, Mbed TLS |
| * provides the configuration option MBEDTLS_UTILS_ZEROIZE_ALT, |
| * which allows users to configure mbedtls_zeroize() to use a |
| * suitable implementation for their platform and needs |
| */ |
| void mbedtls_zeroize( void *buf, size_t len ); |
| |
| #endif /* MBEDTLS_UTILS_H */ |