mirror of
https://github.com/keepassxreboot/keepassxc.git
synced 2024-12-29 01:06:27 -05:00
97 lines
2.5 KiB
C++
97 lines
2.5 KiB
C++
/*
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* Copyright (C) 2019 KeePassXC Team <team@keepassxc.org>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 or (at your option)
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* version 3 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <QtGlobal>
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#include <botan/mem_ops.h>
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#include <cstdlib>
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#if defined(Q_OS_MACOS)
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#include <malloc/malloc.h>
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#elif defined(Q_OS_FREEBSD)
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#include <malloc_np.h>
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#elif defined(HAVE_MALLOC_H)
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#include <malloc.h>
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#else
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#include <cstdlib>
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#endif
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#if defined(NDEBUG) && !defined(__cpp_sized_deallocation)
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#warning "KeePassXC is being compiled without sized deallocation support. Deletes may be slow."
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#endif
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/**
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* Custom sized delete operator which securely zeroes out allocated
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* memory before freeing it (requires C++14 sized deallocation support).
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*/
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void operator delete(void* ptr, std::size_t size) noexcept
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{
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if (!ptr) {
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return;
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}
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Botan::secure_scrub_memory(ptr, size);
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std::free(ptr);
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}
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void operator delete[](void* ptr, std::size_t size) noexcept
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{
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::operator delete(ptr, size);
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}
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/**
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* Custom delete operator which securely zeroes out
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* allocated memory before freeing it.
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*/
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void operator delete(void* ptr) noexcept
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{
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if (!ptr) {
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return;
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}
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#if defined(Q_OS_WIN)
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::operator delete(ptr, _msize(ptr));
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#elif defined(Q_OS_MACOS)
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::operator delete(ptr, malloc_size(ptr));
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#elif defined(HAVE_MALLOC_USABLE_SIZE)
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::operator delete(ptr, malloc_usable_size(ptr));
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#else
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// whatever OS this is, give up and simply free stuff
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std::free(ptr);
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#endif
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}
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void operator delete[](void* ptr) noexcept
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{
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::operator delete(ptr);
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}
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// clang-format versions less than 10.0 refuse to put a space before "noexcept"
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// clang-format off
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/**
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* Custom insecure delete operator that does not zero out memory before
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* freeing a buffer. Can be used for better performance.
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*/
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void operator delete(void* ptr, bool) noexcept
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{
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std::free(ptr);
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}
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// clang-format on
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void operator delete[](void* ptr, bool) noexcept
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{
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::operator delete(ptr, false);
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}
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