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/*
* Copyright (c) 2021, Brian Gianforcaro <bgianf@serenityos.org>
* Copyright (c) 2021, Mustafa Quraish <mustafa@cs.toronto.edu>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/Platform.h>
#include <LibCore/SecretString.h>
#if defined(AK_OS_MACOS)
# define __STDC_WANT_LIB_EXT1__ 1
#endif
#include <string.h>
namespace Core {
SecretString SecretString::take_ownership(char*& cstring, size_t length)
{
auto buffer = ByteBuffer::copy(cstring, length);
VERIFY(buffer.has_value());
#if defined(AK_OS_MACOS)
memset_s(cstring, length, 0, length);
#else
explicit_bzero(cstring, length);
#endif
free(cstring);
return SecretString(buffer.release_value());
}
SecretString SecretString::take_ownership(ByteBuffer&& buffer)
{
return SecretString(move(buffer));
}
SecretString::SecretString(ByteBuffer&& buffer)
: m_secure_buffer(move(buffer))
{
}
SecretString::~SecretString()
{
// Note: We use explicit_bzero to avoid the zeroing from being optimized out by the compiler,
// which is possible if memset was to be used here.
if (!m_secure_buffer.is_empty()) {
#if defined(AK_OS_MACOS)
memset_s(m_secure_buffer.data(), m_secure_buffer.size(), 0, m_secure_buffer.size());
#else
explicit_bzero(m_secure_buffer.data(), m_secure_buffer.capacity());
#endif
}
}
}
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