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ImHex/plugins/builtin/source/content/views/view_information.cpp

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#include "content/views/view_information.hpp"
#include <hex/api/content_registry.hpp>
#include <hex/providers/provider.hpp>
#include <hex/providers/buffered_reader.hpp>
#include <hex/helpers/fs.hpp>
#include <hex/helpers/magic.hpp>
#include <cstring>
#include <cmath>
#include <filesystem>
#include <numeric>
#include <span>
#include <implot.h>
namespace hex::plugin::builtin {
using namespace hex::literals;
ViewInformation::ViewInformation() : View("hex.builtin.view.information.name") {
EventManager::subscribe<EventDataChanged>(this, [this]() {
this->m_dataValid = false;
this->m_highestBlockEntropy = 0;
this->m_blockEntropy.clear();
this->m_averageEntropy = 0;
this->m_blockSize = 0;
this->m_valueCounts.fill(0x00);
this->m_dataMimeType.clear();
this->m_dataDescription.clear();
this->m_analyzedRegion = { 0, 0 };
});
EventManager::subscribe<EventRegionSelected>(this, [this](Region region) {
if (this->m_blockSize != 0)
this->m_entropyHandlePosition = region.getStartAddress() / double(this->m_blockSize);
});
EventManager::subscribe<EventProviderDeleted>(this, [this](const auto*) {
this->m_dataValid = false;
});
ContentRegistry::FileHandler::add({ ".mgc" }, [](const auto &path) {
for (const auto &destPath : fs::getDefaultPaths(fs::ImHexPath::Magic)) {
if (fs::copyFile(path, destPath / path.filename(), std::fs::copy_options::overwrite_existing)) {
View::showInfoPopup("hex.builtin.view.information.magic_db_added"_lang);
return true;
}
}
return false;
});
}
ViewInformation::~ViewInformation() {
EventManager::unsubscribe<EventDataChanged>(this);
EventManager::unsubscribe<EventRegionSelected>(this);
EventManager::unsubscribe<EventProviderDeleted>(this);
}
static float calculateEntropy(std::array<ImU64, 256> &valueCounts, size_t blockSize) {
float entropy = 0;
for (auto count : valueCounts) {
if (count == 0) [[unlikely]]
continue;
float probability = static_cast<float>(count) / blockSize;
entropy += probability * std::log2(probability);
}
return (-entropy) / 8; // log2(256) = 8
}
static std::array<float, 12> calculateTypeDistribution(std::array<ImU64, 256> &valueCounts, size_t blockSize) {
std::array<ImU64, 12> counts = {};
for (u16 value = 0x00; value < u16(valueCounts.size()); value++) {
const auto &count = valueCounts[value];
if (count == 0) [[unlikely]]
continue;
if (std::iscntrl(value))
counts[0] += count;
if (std::isprint(value))
counts[1] += count;
if (std::isspace(value))
counts[2] += count;
if (std::isblank(value))
counts[3] += count;
if (std::isgraph(value))
counts[4] += count;
if (std::ispunct(value))
counts[5] += count;
if (std::isalnum(value))
counts[6] += count;
if (std::isalpha(value))
counts[7] += count;
if (std::isupper(value))
counts[8] += count;
if (std::islower(value))
counts[9] += count;
if (std::isdigit(value))
counts[10] += count;
if (std::isxdigit(value))
counts[11] += count;
}
std::array<float, 12> distribution = {};
for (u32 i = 0; i < distribution.size(); i++)
distribution[i] = static_cast<float>(counts[i]) / blockSize;
return distribution;
}
void ViewInformation::analyze() {
this->m_analyzerTask = TaskManager::createTask("hex.builtin.view.information.analyzing", 0, [this](auto &task) {
auto provider = ImHexApi::Provider::get();
task.setMaxValue(provider->getSize());
this->m_analyzedRegion = { provider->getBaseAddress(), provider->getBaseAddress() + provider->getSize() };
{
magic::compile();
this->m_dataDescription = magic::getDescription(provider);
this->m_dataMimeType = magic::getMIMEType(provider);
}
this->m_dataValid = true;
{
this->m_blockSize = std::max<u32>(std::ceil(provider->getSize() / 2048.0F), 256);
std::array<ImU64, 256> blockValueCounts = { 0 };
this->m_blockTypeDistributions.fill({});
this->m_blockEntropy.clear();
this->m_blockEntropy.resize(provider->getSize() / this->m_blockSize);
this->m_valueCounts.fill(0);
this->m_blockEntropyProcessedCount = 0;
auto reader = prv::BufferedReader(provider);
reader.setEndAddress(provider->getBaseAddress() + provider->getSize());
u64 count = 0;
for (u8 byte : reader) {
this->m_valueCounts[byte]++;
blockValueCounts[byte]++;
count++;
if ((count % this->m_blockSize) == 0) [[unlikely]] {
this->m_blockEntropy[this->m_blockEntropyProcessedCount] = calculateEntropy(blockValueCounts, this->m_blockSize);
{
auto typeDist = calculateTypeDistribution(blockValueCounts, this->m_blockSize);
for (u8 i = 0; i < typeDist.size(); i++)
this->m_blockTypeDistributions[i].push_back(typeDist[i]);
}
this->m_blockEntropyProcessedCount += 1;
blockValueCounts = { 0 };
task.update(count);
}
}
this->m_averageEntropy = calculateEntropy(this->m_valueCounts, provider->getSize());
if (!this->m_blockEntropy.empty())
this->m_highestBlockEntropy = *std::max_element(this->m_blockEntropy.begin(), this->m_blockEntropy.end());
else
this->m_highestBlockEntropy = 0;
}
});
}
void ViewInformation::drawContent() {
if (ImGui::Begin(View::toWindowName("hex.builtin.view.information.name").c_str(), &this->getWindowOpenState(), ImGuiWindowFlags_NoCollapse)) {
if (ImGui::BeginChild("##scrolling", ImVec2(0, 0), false, ImGuiWindowFlags_NoMove | ImGuiWindowFlags_NoNav)) {
auto provider = ImHexApi::Provider::get();
if (ImHexApi::Provider::isValid() && provider->isReadable()) {
ImGui::BeginDisabled(this->m_analyzerTask.isRunning());
{
if (ImGui::Button("hex.builtin.view.information.analyze"_lang, ImVec2(ImGui::GetContentRegionAvail().x, 0)))
this->analyze();
}
ImGui::EndDisabled();
if (this->m_analyzerTask.isRunning()) {
ImGui::TextSpinner("hex.builtin.view.information.analyzing"_lang);
} else {
ImGui::NewLine();
}
if (this->m_dataValid) {
// Analyzed region
ImGui::Header("hex.builtin.view.information.region"_lang, true);
if (ImGui::BeginTable("information", 2, ImGuiTableFlags_SizingFixedFit | ImGuiTableFlags_RowBg | ImGuiTableFlags_NoKeepColumnsVisible)) {
ImGui::TableSetupColumn("type");
ImGui::TableSetupColumn("value", ImGuiTableColumnFlags_WidthStretch);
ImGui::TableNextRow();
for (auto &[name, value] : provider->getDataInformation()) {
ImGui::TableNextColumn();
ImGui::TextFormatted("{}", name);
ImGui::TableNextColumn();
ImGui::TextFormattedWrapped("{}", value);
}
ImGui::TableNextColumn();
ImGui::TextFormatted("{}", "hex.builtin.view.information.region"_lang);
ImGui::TableNextColumn();
ImGui::TextFormatted("0x{:X} - 0x{:X}", this->m_analyzedRegion.getStartAddress(), this->m_analyzedRegion.getEndAddress());
ImGui::EndTable();
}
ImGui::NewLine();
// Magic information
if (!(this->m_dataDescription.empty() && this->m_dataMimeType.empty())) {
ImGui::Header("hex.builtin.view.information.magic"_lang);
if (ImGui::BeginTable("magic", 2, ImGuiTableFlags_SizingFixedFit | ImGuiTableFlags_RowBg)) {
ImGui::TableSetupColumn("type");
ImGui::TableSetupColumn("value", ImGuiTableColumnFlags_WidthStretch);
ImGui::TableNextRow();
if (!this->m_dataDescription.empty()) {
ImGui::TableNextColumn();
ImGui::TextUnformatted("hex.builtin.view.information.description"_lang);
ImGui::TableNextColumn();
ImGui::TextFormattedWrapped("{}", this->m_dataDescription.c_str());
}
if (!this->m_dataMimeType.empty()) {
ImGui::TableNextColumn();
ImGui::TextUnformatted("hex.builtin.view.information.mime"_lang);
ImGui::TableNextColumn();
ImGui::TextFormattedWrapped("{}", this->m_dataMimeType.c_str());
}
ImGui::EndTable();
}
}
// Information analysis
{
ImGui::Header("hex.builtin.view.information.info_analysis"_lang);
ImGui::PushStyleColor(ImGuiCol_FrameBg, ImGui::GetColorU32(ImGuiCol_WindowBg));
ImPlot::PushStyleColor(ImPlotCol_FrameBg, ImGui::GetColorU32(ImGuiCol_WindowBg));
ImGui::TextUnformatted("hex.builtin.view.information.distribution"_lang);
if (ImPlot::BeginPlot("##distribution", ImVec2(-1, 0), ImPlotFlags_NoChild | ImPlotFlags_NoLegend | ImPlotFlags_NoMenus | ImPlotFlags_NoBoxSelect)) {
ImPlot::SetupAxes("hex.builtin.common.value"_lang, "hex.builtin.common.count"_lang, ImPlotAxisFlags_Lock, ImPlotAxisFlags_Lock | ImPlotAxisFlags_LogScale);
ImPlot::SetupAxesLimits(0, 256, 1, double(*std::max_element(this->m_valueCounts.begin(), this->m_valueCounts.end())) * 1.1F, ImGuiCond_Always);
static auto x = [] {
std::array<ImU64, 256> result { 0 };
std::iota(result.begin(), result.end(), 0);
return result;
}();
ImPlot::PlotBars<ImU64>("##bytes", x.data(), this->m_valueCounts.data(), x.size(), 1.0);
ImPlot::EndPlot();
}
ImGui::TextUnformatted("hex.builtin.view.information.byte_types"_lang);
if (ImPlot::BeginPlot("##byte_types", ImVec2(-1, 0), ImPlotFlags_NoChild | ImPlotFlags_NoMenus | ImPlotFlags_NoBoxSelect | ImPlotFlags_AntiAliased)) {
ImPlot::SetupAxes("hex.builtin.common.type"_lang, "hex.builtin.common.count"_lang, ImPlotAxisFlags_Lock, ImPlotAxisFlags_Lock);
ImPlot::SetupAxesLimits(0, this->m_blockTypeDistributions[0].size(), -0.1F, 1.1F, ImGuiCond_Always);
ImPlot::SetupLegend(ImPlotLocation_South, ImPlotLegendFlags_Horizontal | ImPlotLegendFlags_Outside);
constexpr static std::array Names = { "iscntrl", "isprint", "isspace", "isblank", "isgraph", "ispunct", "isalnum", "isalpha", "isupper", "islower", "isdigit", "isxdigit" };
for (u32 i = 0; i < 12; i++) {
ImPlot::PlotLine(Names[i], this->m_blockTypeDistributions[i].data(), this->m_blockTypeDistributions[i].size());
}
if (ImPlot::DragLineX(1, &this->m_entropyHandlePosition, ImGui::GetStyleColorVec4(ImGuiCol_Text))) {
u64 address = u64(std::max<double>(this->m_entropyHandlePosition, 0) * this->m_blockSize) + provider->getBaseAddress();
address = std::min(address, provider->getBaseAddress() + provider->getSize() - 1);
ImHexApi::HexEditor::setSelection(address, 1);
}
ImPlot::EndPlot();
}
ImGui::NewLine();
ImGui::TextUnformatted("hex.builtin.view.information.entropy"_lang);
if (ImPlot::BeginPlot("##entropy", ImVec2(-1, 0), ImPlotFlags_NoChild | ImPlotFlags_CanvasOnly | ImPlotFlags_AntiAliased)) {
ImPlot::SetupAxes("hex.builtin.common.address"_lang, "hex.builtin.view.information.entropy"_lang, ImPlotAxisFlags_Lock, ImPlotAxisFlags_Lock);
ImPlot::SetupAxesLimits(0, this->m_blockEntropy.size(), -0.1F, 1.1F, ImGuiCond_Always);
ImPlot::PlotLine("##entropy_line", this->m_blockEntropy.data(), this->m_blockEntropyProcessedCount);
if (ImPlot::DragLineX(1, &this->m_entropyHandlePosition, ImGui::GetStyleColorVec4(ImGuiCol_Text))) {
u64 address = u64(std::max<double>(this->m_entropyHandlePosition, 0) * this->m_blockSize) + provider->getBaseAddress();
address = std::min(address, provider->getBaseAddress() + provider->getSize() - 1);
ImHexApi::HexEditor::setSelection(address, 1);
}
ImPlot::EndPlot();
}
ImPlot::PopStyleColor();
ImGui::PopStyleColor();
ImGui::NewLine();
}
// Entropy information
if (ImGui::BeginTable("entropy", 2, ImGuiTableFlags_SizingFixedFit | ImGuiTableFlags_RowBg)) {
ImGui::TableSetupColumn("type");
ImGui::TableSetupColumn("value", ImGuiTableColumnFlags_WidthStretch);
ImGui::TableNextRow();
ImGui::TableNextColumn();
ImGui::TextFormatted("{}", "hex.builtin.view.information.block_size"_lang);
ImGui::TableNextColumn();
ImGui::TextFormatted("hex.builtin.view.information.block_size.desc"_lang, this->m_blockEntropy.size(), this->m_blockSize);
ImGui::TableNextColumn();
ImGui::TextFormatted("{}", "hex.builtin.view.information.file_entropy"_lang);
ImGui::TableNextColumn();
ImGui::TextFormatted("{:.8f}", this->m_averageEntropy);
ImGui::TableNextColumn();
ImGui::TextFormatted("{}", "hex.builtin.view.information.highest_entropy"_lang);
ImGui::TableNextColumn();
ImGui::TextFormatted("{:.8f}", this->m_highestBlockEntropy);
ImGui::EndTable();
}
if (this->m_averageEntropy > 0.83 && this->m_highestBlockEntropy > 0.9) {
ImGui::NewLine();
ImGui::TextFormattedColored(ImVec4(0.92F, 0.25F, 0.2F, 1.0F), "{}", "hex.builtin.view.information.encrypted"_lang);
}
}
}
}
ImGui::EndChild();
}
ImGui::End();
}
}
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