keepassxc/src/core/Alloc.cpp
Jonathan White 5142981018 Significantly enhance hardware key robustness
* Significantly improve user experience when using hardware keys on databases in both GUI and CLI modes. Prevent locking up the YubiKey USB interface for prolonged periods of time. Allows for other apps to use the key concurrently with KeePassXC.

* Improve messages displayed to user when finding keys and when user interaction is required. Output specific error messages when handling hardware keys during database read/write.

* Only poll for keys when previously used or upon user request. Prevent continuously polling keys when accessing the UI such as switching tabs and minimize/maximize.

* Add support for using multiple hardware keys simultaneously. Keys are identified by their serial number which prevents using the wrong key during open and save operations.

* Fixes #4400
* Fixes #4065
* Fixes #1050
* Fixes #1215
* Fixes #3087
* Fixes #1088
* Fixes #1869
2020-05-14 20:19:56 -04:00

98 lines
2.5 KiB
C++

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