287 lines
13 KiB
C++
287 lines
13 KiB
C++
#include "content/views/view_information.hpp"
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#include <hex/api/content_registry.hpp>
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#include <hex/providers/provider.hpp>
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#include <hex/providers/buffered_reader.hpp>
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#include <hex/helpers/fs.hpp>
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#include <hex/helpers/magic.hpp>
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#include <cstring>
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#include <cmath>
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#include <filesystem>
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#include <numeric>
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#include <span>
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#include <implot.h>
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namespace hex::plugin::builtin {
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using namespace hex::literals;
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ViewInformation::ViewInformation() : View("hex.builtin.view.information.name") {
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EventManager::subscribe<EventDataChanged>(this, [this]() {
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this->m_dataValid = false;
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this->m_highestBlockEntropy = 0;
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this->m_blockEntropy.clear();
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this->m_averageEntropy = 0;
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this->m_blockSize = 0;
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this->m_valueCounts.fill(0x00);
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this->m_dataMimeType.clear();
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this->m_dataDescription.clear();
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this->m_analyzedRegion = { 0, 0 };
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});
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EventManager::subscribe<EventRegionSelected>(this, [this](Region region) {
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if (this->m_blockSize != 0)
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this->m_entropyHandlePosition = region.getStartAddress() / this->m_blockSize;
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});
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EventManager::subscribe<EventProviderDeleted>(this, [this](const auto*) {
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this->m_dataValid = false;
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});
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ContentRegistry::FileHandler::add({ ".mgc" }, [](const auto &path) {
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for (const auto &destPath : fs::getDefaultPaths(fs::ImHexPath::Magic)) {
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if (fs::copyFile(path, destPath / path.filename(), std::fs::copy_options::overwrite_existing)) {
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View::showInfoPopup("hex.builtin.view.information.magic_db_added"_lang);
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return true;
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}
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}
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return false;
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});
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}
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ViewInformation::~ViewInformation() {
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EventManager::unsubscribe<EventDataChanged>(this);
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EventManager::unsubscribe<EventRegionSelected>(this);
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EventManager::unsubscribe<EventProviderDeleted>(this);
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}
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static float calculateEntropy(std::array<ImU64, 256> &valueCounts, size_t blockSize) {
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float entropy = 0;
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for (auto count : valueCounts) {
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if (count == 0) continue;
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float probability = static_cast<float>(count) / blockSize;
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entropy += probability * std::log2(probability);
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}
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return (-entropy) / 8; // log2(256) = 8
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}
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void ViewInformation::analyze() {
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this->m_analyzerTask = TaskManager::createTask("hex.builtin.view.information.analyzing", 0, [this](auto &task) {
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auto provider = ImHexApi::Provider::get();
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task.setMaxValue(provider->getActualSize());
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this->m_analyzedRegion = { provider->getBaseAddress(), provider->getBaseAddress() + provider->getSize() };
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{
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magic::compile();
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this->m_dataDescription = magic::getDescription(provider);
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this->m_dataMimeType = magic::getMIMEType(provider);
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}
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this->m_dataValid = true;
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{
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this->m_blockSize = std::max<u32>(std::ceil(provider->getActualSize() / 2048.0F), 256);
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std::array<ImU64, 256> blockValueCounts = { 0 };
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this->m_blockEntropy.clear();
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this->m_valueCounts.fill(0);
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auto reader = prv::BufferedReader(provider);
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u64 count = 0;
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for (u8 byte : reader) {
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this->m_valueCounts[byte]++;
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blockValueCounts[byte]++;
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count++;
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if ((count % this->m_blockSize) == 0) [[unlikely]] {
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this->m_blockEntropy.push_back(calculateEntropy(blockValueCounts, this->m_blockSize));
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blockValueCounts = { 0 };
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task.update(count);
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}
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}
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this->m_averageEntropy = calculateEntropy(this->m_valueCounts, provider->getSize());
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if (!this->m_blockEntropy.empty())
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this->m_highestBlockEntropy = *std::max_element(this->m_blockEntropy.begin(), this->m_blockEntropy.end());
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else
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this->m_highestBlockEntropy = 0;
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}
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});
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}
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void ViewInformation::drawContent() {
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if (ImGui::Begin(View::toWindowName("hex.builtin.view.information.name").c_str(), &this->getWindowOpenState(), ImGuiWindowFlags_NoCollapse)) {
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if (ImGui::BeginChild("##scrolling", ImVec2(0, 0), false, ImGuiWindowFlags_NoMove | ImGuiWindowFlags_NoNav)) {
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auto provider = ImHexApi::Provider::get();
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if (ImHexApi::Provider::isValid() && provider->isReadable()) {
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ImGui::BeginDisabled(this->m_analyzerTask.isRunning());
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{
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if (ImGui::Button("hex.builtin.view.information.analyze"_lang, ImVec2(ImGui::GetContentRegionAvail().x, 0)))
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this->analyze();
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}
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ImGui::EndDisabled();
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if (this->m_analyzerTask.isRunning()) {
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ImGui::TextSpinner("hex.builtin.view.information.analyzing"_lang);
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} else {
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ImGui::NewLine();
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}
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if (this->m_dataValid) {
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// Analyzed region
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ImGui::Header("hex.builtin.view.information.region"_lang, true);
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if (ImGui::BeginTable("information", 2, ImGuiTableFlags_SizingFixedFit | ImGuiTableFlags_RowBg)) {
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ImGui::TableSetupColumn("type");
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ImGui::TableSetupColumn("value", ImGuiTableColumnFlags_WidthStretch);
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ImGui::TableNextRow();
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for (auto &[name, value] : provider->getDataInformation()) {
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ImGui::TableNextColumn();
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ImGui::TextFormatted("{}", name);
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ImGui::TableNextColumn();
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ImGui::TextFormattedWrapped("{}", value);
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}
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ImGui::TableNextColumn();
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ImGui::TextFormatted("{}", "hex.builtin.view.information.region"_lang);
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ImGui::TableNextColumn();
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ImGui::TextFormatted("0x{:X} - 0x{:X}", this->m_analyzedRegion.getStartAddress(), this->m_analyzedRegion.getEndAddress());
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ImGui::EndTable();
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}
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ImGui::NewLine();
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// Magic information
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if (!(this->m_dataDescription.empty() && this->m_dataMimeType.empty())) {
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ImGui::Header("hex.builtin.view.information.magic"_lang);
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if (ImGui::BeginTable("magic", 2, ImGuiTableFlags_SizingFixedFit | ImGuiTableFlags_RowBg)) {
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ImGui::TableSetupColumn("type");
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ImGui::TableSetupColumn("value", ImGuiTableColumnFlags_WidthStretch);
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ImGui::TableNextRow();
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if (!this->m_dataDescription.empty()) {
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ImGui::TableNextColumn();
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ImGui::TextUnformatted("hex.builtin.view.information.description"_lang);
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ImGui::TableNextColumn();
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ImGui::TextFormattedWrapped("{}", this->m_dataDescription.c_str());
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}
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if (!this->m_dataMimeType.empty()) {
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ImGui::TableNextColumn();
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ImGui::TextUnformatted("hex.builtin.view.information.mime"_lang);
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ImGui::TableNextColumn();
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ImGui::TextFormattedWrapped("{}", this->m_dataMimeType.c_str());
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}
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ImGui::EndTable();
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}
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}
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// Information analysis
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{
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ImGui::Header("hex.builtin.view.information.info_analysis"_lang);
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ImGui::PushStyleColor(ImGuiCol_FrameBg, ImGui::GetColorU32(ImGuiCol_WindowBg));
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ImPlot::PushStyleColor(ImPlotCol_FrameBg, ImGui::GetColorU32(ImGuiCol_WindowBg));
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ImGui::TextUnformatted("hex.builtin.view.information.distribution"_lang);
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if (ImPlot::BeginPlot("##distribution", ImVec2(-1, 0), ImPlotFlags_NoChild | ImPlotFlags_NoLegend | ImPlotFlags_NoMenus | ImPlotFlags_NoBoxSelect)) {
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ImPlot::SetupAxes("Address", "Count", ImPlotAxisFlags_Lock, ImPlotAxisFlags_Lock | ImPlotAxisFlags_LogScale);
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ImPlot::SetupAxesLimits(0, 256, 1, double(*std::max_element(this->m_valueCounts.begin(), this->m_valueCounts.end())) * 1.1F, ImGuiCond_Always);
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static auto x = [] {
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std::array<ImU64, 256> result { 0 };
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std::iota(result.begin(), result.end(), 0);
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return result;
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}();
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ImPlot::PlotBars<ImU64>("##bytes", x.data(), this->m_valueCounts.data(), x.size(), 1.0);
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ImPlot::EndPlot();
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}
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ImGui::NewLine();
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ImGui::TextUnformatted("hex.builtin.view.information.entropy"_lang);
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if (ImPlot::BeginPlot("##entropy", ImVec2(-1, 0), ImPlotFlags_NoChild | ImPlotFlags_CanvasOnly)) {
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ImPlot::SetupAxes("Address", "Entropy", ImPlotAxisFlags_Lock, ImPlotAxisFlags_Lock);
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ImPlot::SetupAxesLimits(0, this->m_blockEntropy.size(), -0.1F, 1.1F, ImGuiCond_Always);
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ImPlot::PlotLine("##entropy_line", this->m_blockEntropy.data(), this->m_blockEntropy.size());
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if (ImPlot::DragLineX(1, &this->m_entropyHandlePosition, ImGui::GetStyleColorVec4(ImGuiCol_Text))) {
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u64 address = u64(std::max<double>(this->m_entropyHandlePosition, 0) * this->m_blockSize) + provider->getBaseAddress();
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address = std::min(address, provider->getBaseAddress() + provider->getSize() - 1);
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ImHexApi::HexEditor::setSelection(address, 1);
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}
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ImPlot::EndPlot();
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}
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ImPlot::PopStyleColor();
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ImGui::PopStyleColor();
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ImGui::NewLine();
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}
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// Entropy information
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if (ImGui::BeginTable("entropy", 2, ImGuiTableFlags_SizingFixedFit | ImGuiTableFlags_RowBg)) {
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ImGui::TableSetupColumn("type");
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ImGui::TableSetupColumn("value", ImGuiTableColumnFlags_WidthStretch);
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ImGui::TableNextRow();
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ImGui::TableNextColumn();
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ImGui::TextFormatted("{}", "hex.builtin.view.information.block_size"_lang);
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ImGui::TableNextColumn();
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ImGui::TextFormatted("hex.builtin.view.information.block_size.desc"_lang, this->m_blockEntropy.size(), this->m_blockSize);
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ImGui::TableNextColumn();
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ImGui::TextFormatted("{}", "hex.builtin.view.information.file_entropy"_lang);
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ImGui::TableNextColumn();
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ImGui::TextFormatted("{:.8f}", this->m_averageEntropy);
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ImGui::TableNextColumn();
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ImGui::TextFormatted("{}", "hex.builtin.view.information.highest_entropy"_lang);
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ImGui::TableNextColumn();
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ImGui::TextFormatted("{:.8f}", this->m_highestBlockEntropy);
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ImGui::EndTable();
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}
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if (this->m_averageEntropy > 0.83 && this->m_highestBlockEntropy > 0.9) {
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ImGui::NewLine();
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ImGui::TextFormattedColored(ImVec4(0.92F, 0.25F, 0.2F, 1.0F), "{}", "hex.builtin.view.information.encrypted"_lang);
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}
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}
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}
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}
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ImGui::EndChild();
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}
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ImGui::End();
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}
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} |