mirror of
https://github.com/monero-project/monero.git
synced 2024-11-05 16:07:37 +00:00
80 lines
2.8 KiB
C++
80 lines
2.8 KiB
C++
// Copyright (c) 2017-2020, The Monero Project
|
|
//
|
|
// All rights reserved.
|
|
//
|
|
// Redistribution and use in source and binary forms, with or without modification, are
|
|
// permitted provided that the following conditions are met:
|
|
//
|
|
// 1. Redistributions of source code must retain the above copyright notice, this list of
|
|
// conditions and the following disclaimer.
|
|
//
|
|
// 2. Redistributions in binary form must reproduce the above copyright notice, this list
|
|
// of conditions and the following disclaimer in the documentation and/or other
|
|
// materials provided with the distribution.
|
|
//
|
|
// 3. Neither the name of the copyright holder nor the names of its contributors may be
|
|
// used to endorse or promote products derived from this software without specific
|
|
// prior written permission.
|
|
//
|
|
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
|
|
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
|
|
// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
|
|
// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
|
|
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
|
|
// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
|
|
// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
//
|
|
// Parts of this file are originally copyright (c) 2012-2013 The Cryptonote developers
|
|
|
|
#pragma once
|
|
|
|
#ifdef __cplusplus
|
|
#include <array>
|
|
|
|
extern "C" {
|
|
#endif
|
|
|
|
void *memwipe(void *src, size_t n);
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#ifdef __cplusplus
|
|
namespace tools {
|
|
|
|
/// Scrubs data in the contained type upon destruction.
|
|
///
|
|
/// Primarily useful for making sure that private keys don't stick around in
|
|
/// memory after the objects that held them have gone out of scope.
|
|
template <class T>
|
|
struct scrubbed : public T {
|
|
using type = T;
|
|
|
|
~scrubbed() {
|
|
scrub();
|
|
}
|
|
|
|
/// Destroy the contents of the contained type.
|
|
void scrub() {
|
|
static_assert(std::is_pod<T>::value,
|
|
"T cannot be auto-scrubbed. T must be POD.");
|
|
static_assert(std::is_trivially_destructible<T>::value,
|
|
"T cannot be auto-scrubbed. T must be trivially destructable.");
|
|
memwipe(this, sizeof(T));
|
|
}
|
|
};
|
|
|
|
template<typename T>
|
|
T& unwrap(scrubbed<T>& src) { return src; }
|
|
|
|
template<typename T>
|
|
const T& unwrap(scrubbed<T> const& src) { return src; }
|
|
|
|
template <class T, size_t N>
|
|
using scrubbed_arr = scrubbed<std::array<T, N>>;
|
|
} // namespace tools
|
|
|
|
#endif // __cplusplus
|