/*
 * This file is part of the AzerothCore Project. See AUTHORS file for Copyright information
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Affero 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 Affero 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/>.
 */

#ifndef AC_ARGON2_H
#define AC_ARGON2_H

#include "BigNumber.h"
#include "Optional.h"

namespace Acore::Crypto
{
    struct AC_COMMON_API Argon2
    {
        static constexpr uint32 HASH_LEN = 16;                    // 128 bits, in bytes
        static constexpr uint32 ENCODED_HASH_LEN = 100;           // in chars
        static constexpr uint32 DEFAULT_ITERATIONS = 10;          // determined by dice roll, guaranteed to be secure (not really)
        static constexpr uint32 DEFAULT_MEMORY_COST = (1u << 17); // 2^17 kibibytes is 2^7 mebibytes is ~100MB
        static constexpr uint32 PARALLELISM = 1;                  // we don't support threaded hashing

        static Optional<std::string> Hash(std::string const& password, BigNumber const& salt, uint32 nIterations = DEFAULT_ITERATIONS, uint32 kibMemoryCost = DEFAULT_MEMORY_COST);
        static bool Verify(std::string const& password, std::string const& hash);
    };
}

#endif
