581 lines
22 KiB
C++
581 lines
22 KiB
C++
/*
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Copyright <2018-2025> <scott.e.graves@protonmail.com>
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.
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*/
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#ifndef REPERTORY_INCLUDE_UTILS_ENCRYPTION_HPP_
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#define REPERTORY_INCLUDE_UTILS_ENCRYPTION_HPP_
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#if defined(PROJECT_ENABLE_LIBSODIUM)
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#include "utils/config.hpp"
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#include "utils/error.hpp"
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#include "utils/hash.hpp"
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namespace repertory::utils::encryption {
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inline constexpr std::uint32_t encryption_header_size{
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crypto_aead_xchacha20poly1305_IETF_NPUBBYTES +
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crypto_aead_xchacha20poly1305_IETF_ABYTES,
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};
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#if defined(PROJECT_ENABLE_BOOST)
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enum class kdf_version : std::uint8_t { v1 };
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enum class kdf_type : std::uint8_t { argon2id };
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enum class memlimit_level : std::uint8_t {
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level1, // 64MiB
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level2, // 256MiB
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level3, // 512MiB
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level4, // 1GiB
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};
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enum class opslimit_level : std::uint8_t {
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level1, // interactive
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level2, // moderate
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level3, // sensitive
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};
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[[nodiscard]] inline auto get_memlimit(memlimit_level memlimit) -> size_t {
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constexpr const auto mib512{512ULL * 1024ULL * 1024ULL};
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switch (memlimit) {
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case memlimit_level::level1:
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return crypto_pwhash_MEMLIMIT_INTERACTIVE;
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case memlimit_level::level2:
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return crypto_pwhash_MEMLIMIT_MODERATE;
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case memlimit_level::level3:
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return mib512;
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case memlimit_level::level4:
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return crypto_pwhash_MEMLIMIT_SENSITIVE;
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}
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return mib512;
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}
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[[nodiscard]] inline auto get_opslimit(opslimit_level opslimit)
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-> unsigned long long {
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switch (opslimit) {
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case opslimit_level::level1:
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return crypto_pwhash_OPSLIMIT_INTERACTIVE;
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case opslimit_level::level2:
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return crypto_pwhash_OPSLIMIT_MODERATE;
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case opslimit_level::level3:
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return crypto_pwhash_OPSLIMIT_SENSITIVE;
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}
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return crypto_pwhash_OPSLIMIT_MODERATE;
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}
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#pragma pack(push, 1)
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struct kdf_config final {
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static constexpr std::uint32_t repertory_magic{0x52505432};
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using salt_t = std::array<std::uint8_t, crypto_pwhash_SALTBYTES>;
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std::uint32_t magic{repertory_magic};
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kdf_version version{kdf_version::v1};
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kdf_type kdf{kdf_type::argon2id};
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memlimit_level memlimit{memlimit_level::level3};
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opslimit_level opslimit{opslimit_level::level2};
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salt_t salt{};
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std::uint64_t checksum{};
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[[nodiscard]] static constexpr auto size() -> std::size_t {
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return sizeof(kdf_config);
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}
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[[nodiscard]] auto generate_checksum() const -> std::uint64_t;
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void generate_salt();
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[[nodiscard]] static auto from_header(std::span<const unsigned char> data,
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kdf_config &cfg) -> bool;
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[[nodiscard]] auto to_header() -> auto {
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kdf_config tmp{*this};
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tmp.checksum = boost::endian::native_to_big(tmp.checksum);
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tmp.magic = boost::endian::native_to_big(tmp.magic);
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std::array<std::uint8_t, size()> ret{};
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std::memcpy(ret.data(), &tmp, size());
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return ret;
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}
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[[nodiscard]] auto operator==(const kdf_config &) const -> bool = default;
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[[nodiscard]] auto operator!=(const kdf_config &) const -> bool = default;
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};
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#pragma pack(pop)
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#endif // defined(PROJECT_ENABLE_BOOST)
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template <typename hash_t>
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[[nodiscard]] inline auto generate_key(
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std::string_view password,
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std::function<hash_t(const unsigned char *data, std::size_t size)> hasher =
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utils::hash::default_create_hash<hash_t>()) -> hash_t;
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template <typename hash_t>
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[[nodiscard]] inline auto generate_key(
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std::wstring_view password,
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std::function<hash_t(const unsigned char *data, std::size_t size)> hasher =
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utils::hash::default_create_hash<hash_t>()) -> hash_t;
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#if defined(PROJECT_ENABLE_BOOST)
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template <typename hash_t>
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[[nodiscard]] inline auto generate_key(std::string_view password,
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kdf_config &cfg) -> hash_t;
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template <typename hash_t>
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[[nodiscard]] inline auto generate_key(std::wstring_view password,
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kdf_config &cfg) -> hash_t;
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template <typename hash_t>
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[[nodiscard]] inline auto recreate_key(std::string_view password,
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const kdf_config &cfg) -> hash_t;
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template <typename hash_t>
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[[nodiscard]] inline auto recreate_key(std::wstring_view password,
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const kdf_config &cfg) -> hash_t;
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template <typename string_t>
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[[nodiscard]] auto create_key_argon2id(string_t password, kdf_config &cfg,
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utils::hash::hash_256_t &key) -> bool;
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template <typename string_t>
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[[nodiscard]] auto recreate_key_argon2id(string_t password,
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const kdf_config &cfg,
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utils::hash::hash_256_t &key) -> bool;
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template <typename hash_t, typename string_t>
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[[nodiscard]] inline bool
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detect_and_recreate_key(string_t password,
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std::span<const unsigned char> header, hash_t &key,
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std::optional<kdf_config> &cfg);
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template <typename hash_t>
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[[nodiscard]] inline bool
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detect_and_recreate_key(std::string_view password,
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std::span<const unsigned char> header, hash_t &key,
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std::optional<kdf_config> &cfg);
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template <typename hash_t>
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[[nodiscard]] inline bool
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detect_and_recreate_key(std::wstring_view password,
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std::span<const unsigned char> header, hash_t &key,
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std::optional<kdf_config> &cfg);
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[[nodiscard]] auto decrypt_file_name(std::string_view encryption_token,
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std::string &file_name) -> bool;
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[[nodiscard]] auto decrypt_file_path(std::string_view encryption_token,
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std::string &file_path) -> bool;
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[[nodiscard]] auto decrypt_file_name(std::string_view encryption_token,
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const kdf_config &cfg,
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std::string &file_name) -> bool;
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[[nodiscard]] auto decrypt_file_path(std::string_view encryption_token,
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const kdf_config &cfg,
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std::string &file_path) -> bool;
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template <typename result_t, typename arr_t, std::size_t arr_size>
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[[nodiscard]] inline auto decrypt_data(const std::array<arr_t, arr_size> &key,
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const unsigned char *buffer,
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std::size_t buffer_size, result_t &res)
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-> bool {
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if (buffer_size > encryption_header_size) {
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std::uint32_t size =
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boost::endian::native_to_big(static_cast<std::uint32_t>(buffer_size));
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res.resize(buffer_size - encryption_header_size);
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return crypto_aead_xchacha20poly1305_ietf_decrypt_detached(
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reinterpret_cast<unsigned char *>(res.data()), nullptr,
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&buffer[encryption_header_size], res.size(),
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&buffer[crypto_aead_xchacha20poly1305_IETF_NPUBBYTES],
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reinterpret_cast<const unsigned char *>(&size), sizeof(size),
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buffer, key.data()) == 0;
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}
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return false;
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}
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template <typename buffer_t, typename result_t, typename arr_t,
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std::size_t arr_size>
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[[nodiscard]] inline auto decrypt_data(const std::array<arr_t, arr_size> &key,
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const buffer_t &buf, result_t &res)
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-> bool {
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return decrypt_data<result_t>(
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key, reinterpret_cast<const unsigned char *>(buf.data()), buf.size(),
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res);
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}
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template <typename buffer_t, typename result_t,
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typename hash_t = utils::hash::hash_256_t>
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[[nodiscard]] inline auto decrypt_data(
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std::string_view password, const buffer_t &buf, result_t &res,
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std::function<hash_t(const unsigned char *data, std::size_t size)> hasher =
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utils::hash::default_create_hash<hash_t>()) -> bool {
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return decrypt_data<buffer_t, result_t>(generate_key(password, hasher), buf,
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res);
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}
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template <typename buffer_t, typename result_t,
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typename hash_t = utils::hash::hash_256_t>
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[[nodiscard]] inline auto decrypt_data(std::string_view password,
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const kdf_config &cfg,
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const buffer_t &buf, result_t &res)
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-> bool {
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return decrypt_data<buffer_t, result_t>(recreate_key<hash_t>(password, cfg),
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buf, res);
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}
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template <typename result_t, typename hash_t = utils::hash::hash_256_t>
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[[nodiscard]] inline auto decrypt_data(
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std::string_view password, const unsigned char *buffer,
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std::size_t buffer_size, result_t &res,
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std::function<hash_t(const unsigned char *data, std::size_t size)> hasher =
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utils::hash::default_create_hash<hash_t>()) -> bool {
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return decrypt_data<result_t>(generate_key(password, hasher), buffer,
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buffer_size, res);
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}
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template <typename result_t, typename hash_t = utils::hash::hash_256_t>
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[[nodiscard]] inline auto decrypt_data(std::string_view password,
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const kdf_config &cfg,
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const unsigned char *buffer,
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std::size_t buffer_size, result_t &res)
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-> bool {
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return decrypt_data<result_t>(recreate_key<hash_t>(password, cfg), buffer,
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buffer_size, res);
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}
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template <typename result_t, typename arr_t, std::size_t arr_size>
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inline void
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encrypt_data(const std::array<unsigned char,
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crypto_aead_xchacha20poly1305_IETF_NPUBBYTES> &iv,
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const std::array<arr_t, arr_size> &key,
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const unsigned char *buffer, std::size_t buffer_size,
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result_t &res) {
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REPERTORY_USES_FUNCTION_NAME();
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std::array<unsigned char, crypto_aead_xchacha20poly1305_IETF_ABYTES> mac{};
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const std::uint32_t size = boost::endian::native_to_big(
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static_cast<std::uint32_t>(buffer_size + encryption_header_size));
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res.resize(buffer_size + encryption_header_size);
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unsigned long long mac_length{};
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if (crypto_aead_xchacha20poly1305_ietf_encrypt_detached(
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reinterpret_cast<unsigned char *>(&res[encryption_header_size]),
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mac.data(), &mac_length, buffer, buffer_size,
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reinterpret_cast<const unsigned char *>(&size), sizeof(size), nullptr,
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iv.data(), key.data()) != 0) {
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throw repertory::utils::error::create_exception(function_name,
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{
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"encryption failed",
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});
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}
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std::memcpy(res.data(), iv.data(), iv.size());
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std::memcpy(&res[iv.size()], mac.data(), mac.size());
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}
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template <typename result_t, typename arr_t, std::size_t arr_size>
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inline void encrypt_data(const std::array<arr_t, arr_size> &key,
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const unsigned char *buffer, std::size_t buffer_size,
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result_t &res) {
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std::array<unsigned char, crypto_aead_xchacha20poly1305_IETF_NPUBBYTES> iv{};
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randombytes_buf(iv.data(), iv.size());
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encrypt_data<result_t>(iv, key, buffer, buffer_size, res);
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}
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template <typename result_t, typename hash_t = utils::hash::hash_256_t>
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inline void encrypt_data(
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std::string_view password, const unsigned char *buffer,
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std::size_t buffer_size, result_t &res,
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std::function<hash_t(const unsigned char *data, std::size_t size)> hasher =
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utils::hash::default_create_hash<hash_t>()) {
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encrypt_data<result_t>(generate_key(password, hasher), buffer, buffer_size,
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res);
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}
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template <typename result_t, typename hash_t = utils::hash::hash_256_t>
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inline void encrypt_data(std::string_view password, kdf_config &cfg,
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const unsigned char *buffer, std::size_t buffer_size,
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result_t &res) {
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encrypt_data<result_t>(generate_key<hash_t>(password, cfg), buffer,
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buffer_size, res);
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}
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template <typename buffer_t, typename result_t,
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typename hash_t = utils::hash::hash_256_t>
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inline void encrypt_data(
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std::string_view password, const buffer_t &buf, result_t &res,
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std::function<hash_t(const unsigned char *data, std::size_t size)> hasher =
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utils::hash::default_create_hash<hash_t>()) {
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encrypt_data<result_t>(generate_key(password, hasher),
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reinterpret_cast<const unsigned char *>(buf.data()),
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buf.size(), res);
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}
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template <typename buffer_t, typename result_t,
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typename hash_t = utils::hash::hash_256_t>
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inline void encrypt_data(std::string_view password, kdf_config &cfg,
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const buffer_t &buf, result_t &res) {
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encrypt_data<result_t>(generate_key<hash_t>(password, cfg),
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reinterpret_cast<const unsigned char *>(buf.data()),
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buf.size(), res);
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}
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template <typename buffer_t, typename result_t, typename arr_t,
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std::size_t arr_size>
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inline void encrypt_data(const std::array<arr_t, arr_size> &key,
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const buffer_t &buf, result_t &res) {
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encrypt_data<result_t>(key,
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reinterpret_cast<const unsigned char *>(buf.data()),
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buf.size(), res);
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}
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template <typename buffer_t, typename result_t, typename arr_t,
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std::size_t arr_size>
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inline void
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encrypt_data(const std::array<unsigned char,
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crypto_aead_xchacha20poly1305_IETF_NPUBBYTES> &iv,
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const std::array<arr_t, arr_size> &key, const buffer_t &buf,
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result_t &res) {
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encrypt_data<result_t>(iv, key,
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reinterpret_cast<const unsigned char *>(buf.data()),
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buf.size(), res);
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}
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using reader_func_t =
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std::function<bool(data_buffer &cypher_text, std::uint64_t start_offset,
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std::uint64_t end_offset)>;
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[[nodiscard]] auto read_encrypted_range(const http_range &range,
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const utils::hash::hash_256_t &key,
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bool uses_kdf,
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reader_func_t reader_func,
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std::uint64_t total_size,
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data_buffer &data) -> bool;
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[[nodiscard]] auto read_encrypted_range(
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const http_range &range, const utils::hash::hash_256_t &key, bool uses_kdf,
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reader_func_t reader_func, std::uint64_t total_size, unsigned char *data,
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std::size_t size, std::size_t &bytes_read) -> bool;
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[[nodiscard]] inline auto
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read_encrypted_range(const http_range &range,
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const utils::hash::hash_256_t &key,
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reader_func_t reader_func, std::uint64_t total_size,
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data_buffer &data) -> bool {
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return read_encrypted_range(range, key, false, reader_func, total_size, data);
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}
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[[nodiscard]] inline auto read_encrypted_range(
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const http_range &range, const utils::hash::hash_256_t &key,
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reader_func_t reader_func, std::uint64_t total_size, unsigned char *data,
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std::size_t size, std::size_t &bytes_read) -> bool {
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return read_encrypted_range(range, key, false, reader_func, total_size, data,
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size, bytes_read);
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}
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template <typename string_t>
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auto create_key_argon2id(string_t password, kdf_config &cfg,
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utils::hash::hash_256_t &key) -> bool {
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cfg.generate_salt();
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return recreate_key_argon2id(password, cfg, key);
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}
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template <typename string_t>
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auto recreate_key_argon2id(string_t password, const kdf_config &cfg,
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utils::hash::hash_256_t &key) -> bool {
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return crypto_pwhash(
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reinterpret_cast<unsigned char *>(key.data()), key.size(),
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reinterpret_cast<const char *>(password.data()),
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password.size() * sizeof(typename string_t::value_type),
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cfg.salt.data(), get_opslimit(cfg.opslimit),
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get_memlimit(cfg.memlimit), crypto_pwhash_ALG_ARGON2ID13) == 0;
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}
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#endif // defined(PROJECT_ENABLE_BOOST)
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template <typename hash_t>
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inline auto generate_key(
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std::string_view password,
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std::function<hash_t(const unsigned char *data, std::size_t size)> hasher)
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-> hash_t {
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return hasher(reinterpret_cast<const unsigned char *>(password.data()),
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password.size());
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}
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template <typename hash_t>
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inline auto generate_key(
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std::wstring_view password,
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std::function<hash_t(const unsigned char *data, std::size_t size)> hasher)
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-> hash_t {
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return hasher(reinterpret_cast<const unsigned char *>(password.data()),
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password.size() * sizeof(wchar_t));
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}
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#if defined(PROJECT_ENABLE_BOOST)
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template <typename hash_t, typename string_t>
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inline auto generate_key_impl(string_t password, kdf_config &cfg) -> hash_t {
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REPERTORY_USES_FUNCTION_NAME();
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switch (cfg.version) {
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case kdf_version::v1:
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switch (cfg.kdf) {
|
|
case kdf_type::argon2id: {
|
|
hash_t key{};
|
|
if (not create_key_argon2id(password, cfg, key)) {
|
|
throw utils::error::create_exception(
|
|
function_name, {
|
|
"failed to generate argon2id key",
|
|
});
|
|
}
|
|
|
|
return key;
|
|
}
|
|
|
|
default:
|
|
throw utils::error::create_exception(
|
|
function_name, {
|
|
"unsupported kdf type",
|
|
std::to_string(static_cast<std::uint8_t>(cfg.kdf)),
|
|
});
|
|
}
|
|
|
|
default:
|
|
throw utils::error::create_exception(
|
|
function_name,
|
|
{
|
|
"unsupported kdf version",
|
|
std::to_string(static_cast<std::uint8_t>(cfg.version)),
|
|
});
|
|
}
|
|
}
|
|
|
|
template <typename hash_t, typename string_t>
|
|
inline auto recreate_key_impl(string_t password, const kdf_config &cfg)
|
|
-> hash_t {
|
|
REPERTORY_USES_FUNCTION_NAME();
|
|
|
|
switch (cfg.version) {
|
|
case kdf_version::v1:
|
|
switch (cfg.kdf) {
|
|
case kdf_type::argon2id: {
|
|
hash_t key{};
|
|
if (not recreate_key_argon2id(password, cfg, key)) {
|
|
throw utils::error::create_exception(
|
|
function_name, {
|
|
"failed to generate argon2id key",
|
|
});
|
|
}
|
|
|
|
return key;
|
|
}
|
|
|
|
default:
|
|
throw utils::error::create_exception(
|
|
function_name, {
|
|
"unsupported kdf type",
|
|
std::to_string(static_cast<std::uint8_t>(cfg.kdf)),
|
|
});
|
|
}
|
|
|
|
default:
|
|
throw utils::error::create_exception(
|
|
function_name,
|
|
{
|
|
"unsupported kdf version",
|
|
std::to_string(static_cast<std::uint8_t>(cfg.version)),
|
|
});
|
|
}
|
|
}
|
|
|
|
template <typename hash_t>
|
|
inline auto generate_key(std::string_view password, kdf_config &cfg) -> hash_t {
|
|
return generate_key_impl<hash_t, std::string_view>(password, cfg);
|
|
}
|
|
|
|
template <typename hash_t>
|
|
inline auto generate_key(std::wstring_view password, kdf_config &cfg)
|
|
-> hash_t {
|
|
return generate_key_impl<hash_t, std::wstring_view>(password, cfg);
|
|
}
|
|
|
|
template <typename hash_t>
|
|
inline auto recreate_key(std::string_view password, const kdf_config &cfg)
|
|
-> hash_t {
|
|
return recreate_key_impl<hash_t, std::string_view>(password, cfg);
|
|
}
|
|
|
|
template <typename hash_t>
|
|
inline auto recreate_key(std::wstring_view password, const kdf_config &cfg)
|
|
-> hash_t {
|
|
return recreate_key_impl<hash_t, std::wstring_view>(password, cfg);
|
|
}
|
|
|
|
template <typename hash_t, typename string_t>
|
|
inline bool detect_and_recreate_key(string_t password,
|
|
std::span<const unsigned char> header,
|
|
hash_t &key,
|
|
std::optional<kdf_config> &cfg) {
|
|
if (header.size() >= kdf_config::size()) {
|
|
kdf_config tmp{};
|
|
if (kdf_config::from_header(header.first(kdf_config::size()), tmp)) {
|
|
cfg = tmp;
|
|
key = recreate_key<hash_t>(password, *cfg);
|
|
return true;
|
|
}
|
|
}
|
|
|
|
key = generate_key<hash_t>(password);
|
|
return false;
|
|
}
|
|
|
|
template <typename hash_t>
|
|
inline bool detect_and_recreate_key(std::string_view password,
|
|
std::span<const unsigned char> header,
|
|
hash_t &key,
|
|
std::optional<kdf_config> &cfg) {
|
|
return detect_and_recreate_key<hash_t, std::string_view>(password, header,
|
|
key, cfg);
|
|
}
|
|
|
|
template <typename hash_t>
|
|
inline bool detect_and_recreate_key(std::wstring_view password,
|
|
std::span<const unsigned char> header,
|
|
hash_t &key,
|
|
std::optional<kdf_config> &cfg) {
|
|
return detect_and_recreate_key<hash_t, std::wstring_view>(password, header,
|
|
key, cfg);
|
|
}
|
|
#endif // defined(PROJECT_ENABLE_BOOST)
|
|
} // namespace repertory::utils::encryption
|
|
|
|
#endif // defined(PROJECT_ENABLE_LIBSODIUM)
|
|
#endif // REPERTORY_INCLUDE_UTILS_ENCRYPTION_HPP_
|