// =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
// Mobius Forensic Toolkit
// Copyright (C)
// 2008,2009,2010,2011,2012,2013,2014,2015,2016,2017,2018,2019,2020,2021,2022,2023,2024,2025
// Eduardo Aguiar
//
// 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) 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/>.
// =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
#include <cstdint>
#include <map>
#include <mobius/core/exception.inc>
#include <mobius/core/os/win/dpapi/hash_info.hpp>
#include <stdexcept>
#include <string>

namespace
{
// =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
// @brief Hash information map
// @see https://docs.microsoft.com/en-us/windows/desktop/seccrypto/alg-id
// =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
struct hash_info
{
    std::string id;            // crypt::hash hash_id
    std::uint32_t digest_size; // digest size in bytes
    std::uint32_t block_size;  // block size in bytes
};

static const std::map<std::uint32_t, hash_info> HASHES = {
    {0x8002, {"md4", 16, 64}},       {0x8003, {"md5", 16, 64}},
    {0x8004, {"sha1", 20, 64}},      {0x8009, {"sha1", 20, 64}},
    {0x800c, {"sha2-256", 32, 64}},  {0x800d, {"sha2-384", 48, 128}},
    {0x800e, {"sha2-512", 64, 128}},
};

} // namespace

namespace mobius::core::os::win::dpapi
{
// =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
// @brief Get mobius::core::crypt hash ID from MS alg ID
// @param ms_alg_id MS alg ID
// @return mobius::core::crypt::hash ID
// =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
std::string
get_hash_id (std::uint32_t ms_alg_id)
{
    auto iter = HASHES.find (ms_alg_id);

    if (iter != HASHES.end ())
        return iter->second.id;

    else
        throw std::invalid_argument (
            MOBIUS_EXCEPTION_MSG ("Unknown MS alg ID"));
}

// =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
// @brief Get hash digest size from MS alg ID
// @param ms_alg_id MS alg ID
// @return Digest size in bytes
// =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
std::uint32_t
get_hash_digest_size (std::uint32_t ms_alg_id)
{
    auto iter = HASHES.find (ms_alg_id);

    if (iter != HASHES.end ())
        return iter->second.digest_size;

    else
        throw std::invalid_argument (
            MOBIUS_EXCEPTION_MSG ("Unknown MS alg ID"));
}

// =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
// @brief Get hash block size from MS alg ID
// @param ms_alg_id MS alg ID
// @return Block size in bytes
// =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
std::uint32_t
get_hash_block_size (std::uint32_t ms_alg_id)
{
    auto iter = HASHES.find (ms_alg_id);

    if (iter != HASHES.end ())
        return iter->second.block_size;

    else
        throw std::invalid_argument (
            MOBIUS_EXCEPTION_MSG ("Unknown MS alg ID"));
}

} // namespace mobius::core::os::win::dpapi
