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/*
KeePassLibN
Copyright (C) 2003-2025 Dominik Reichl <dominik.reichl@t-online.de>
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 of the License, or
(at your option) any later version.
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, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "AlignedBuffer.h"
CAlignedBuffer::CAlignedBuffer() :
m_pb(nullptr), m_cb(0), m_bZeroOnDestruct(false)
{
}
CAlignedBuffer::CAlignedBuffer(size_t cbSize, size_t cbAlignment,
bool bZeroOnConstruct, bool bZeroOnDestruct) :
m_cb(cbSize), m_bZeroOnDestruct(bZeroOnDestruct)
{
m_pb = AllocAlignedMemory(cbSize, cbAlignment);
if(bZeroOnConstruct && (m_pb != nullptr)) ZeroMemory(m_pb, cbSize);
}
CAlignedBuffer::CAlignedBuffer(size_t cbSize, size_t cbAlignment,
const uint8_t* pbInit, bool bZeroOnDestruct) :
m_cb(cbSize), m_bZeroOnDestruct(bZeroOnDestruct)
{
m_pb = AllocAlignedMemory(cbSize, cbAlignment);
if((pbInit != nullptr) && (m_pb != nullptr)) memcpy(m_pb, pbInit, cbSize);
}
CAlignedBuffer::~CAlignedBuffer()
{
if(m_pb != nullptr)
{
if(m_bZeroOnDestruct) SecureZeroMemory(m_pb, m_cb);
_aligned_free(m_pb);
m_pb = nullptr;
}
}
uint8_t* CAlignedBuffer::AllocAlignedMemory(size_t cbSize, size_t cbAlignment)
{
assert(cbSize > 0);
assert((cbAlignment & (cbAlignment - 1)) == 0); // Power of 2
uint8_t* pb = (uint8_t*)_aligned_malloc(cbSize, cbAlignment);
assert(((size_t)pb & (cbAlignment - 1)) == 0);
return pb;
}
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