aes_ni.hh

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/*
 * libkeepass - KeePass key database importer/exporter
 * Copyright (C) 2014 Christian Kindahl
 * Copyright (C) 2024 Dominik Krümpelmann
 *
 * 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 3 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, see <http://www.gnu.org/licenses/>.
 */
 
#pragma once
 
#include <cstdint>
 
#include "libkeepass/export.hh"
 
// AES-NI is an x86/x86-64 instruction-set extension. It is only compiled (and
// declared) on architectures that support it; elsewhere the portable EVP-based
// AES-KDF fallback in Key::Transform is used instead.
//
// MSVC is excluded: aes_ni.cc relies on GCC/Clang-only helpers (<cpuid.h>,
// __get_cpuid) and the -maes ISA flag, so on MSVC the portable EVP path is
// used. OpenSSL uses AES-NI internally, so the fallback is still fast.
#if (defined(__x86_64__) || defined(_M_X64) || defined(__i386__) || defined(_M_IX86)) &&           \
    !defined(_MSC_VER)
#define LIBKEEPASS_AES_NI 1
#else
#define LIBKEEPASS_AES_NI 0
#endif
 
namespace keepass {
 
#if LIBKEEPASS_AES_NI
 
LIBKEEPASS_API bool aes_ni_supported();
 
void LIBKEEPASS_API aes_ni_transform_aes_kdf(const uint8_t seed[32], const uint8_t in[32],
                                             uint64_t rounds, uint8_t out[32]);
 
#endif // LIBKEEPASS_AES_NI
 
} // namespace keepass