mirror of
https://github.com/patchzyy/wiicompiled
synced 2026-09-11 09:25:05 -04:00
patchzyy
70 lines
2.2 KiB
C++
70 lines
2.2 KiB
C++
#pragma once
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#include <array>
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#include <cstdint>
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#include <filesystem>
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#include <fstream>
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#include <map>
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#include <optional>
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#include <string>
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#include <utility>
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namespace RuntimeNandSettings {
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using Settings = std::map<std::string, std::string>;
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// Wii setting.txt is a 256-byte buffer encrypted with a rotating XOR key.
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inline std::optional<Settings> Read(const std::filesystem::path& nandRoot) {
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std::ifstream input(nandRoot / "title/00000001/00000002/data/setting.txt",
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std::ios::binary);
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std::array<uint8_t, 256> bytes{};
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if (!input.read(reinterpret_cast<char*>(bytes.data()), bytes.size())) {
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return std::nullopt;
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}
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uint32_t key = 0x73B5DBFAu;
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std::string decoded;
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for (const uint8_t byte : bytes) {
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const char value = static_cast<char>(byte ^ static_cast<uint8_t>(key));
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key = (key << 1) | (key >> 31);
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if (value == '\0') {
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break;
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}
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if (value != '\r') {
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decoded += value;
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}
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}
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Settings settings;
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for (size_t start = 0; start < decoded.size();) {
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const size_t end = decoded.find('\n', start);
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const std::string line = decoded.substr(start, end - start);
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const size_t equals = line.find('=');
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if (equals != std::string::npos && equals != 0) {
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settings.emplace(line.substr(0, equals), line.substr(equals + 1));
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}
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if (end == std::string::npos) {
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break;
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}
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start = end + 1;
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}
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return settings;
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}
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inline bool HasIdentity(const Settings& settings) {
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const auto serial = settings.find("SERNO");
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if (serial == settings.end() || serial->second.empty() || serial->second.size() > 9 ||
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serial->second.find_first_not_of("0123456789") != std::string::npos ||
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serial->second.find_first_not_of('0') == std::string::npos) {
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return false;
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}
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for (const auto& field : {std::pair{"CODE", 5u}, {"AREA", 3u}, {"GAME", 2u}}) {
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const auto value = settings.find(field.first);
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if (value == settings.end() || value->second.empty() ||
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value->second.size() > field.second) {
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return false;
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}
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}
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return true;
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}
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} // namespace RuntimeNandSettings
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