Cool_Tools/ImHex
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Allow loading of huge files efficiently

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This commit is contained in:
WerWolv 2020-11-22 19:43:35 +01:00
parent 5f025bcbcc
commit 43f5cc622e
8 changed files with 121 additions and 63 deletions
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2
include/providers/file_provider.hpp
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@ -19,7 +19,7 @@ namespace hex::prv {
void read(u64 offset, void *buffer, size_t size) override;
void write(u64 offset, void *buffer, size_t size) override;
size_t getSize() override;
size_t getActualSize() override;
std::vector<std::pair<std::string, std::string>> getDataInformation() override;

20
include/providers/provider.hpp
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@ -2,6 +2,7 @@
#include <hex.hpp>
#include <cmath>
#include <string>
#include <vector>
@ -9,6 +10,8 @@ namespace hex::prv {
class Provider {
public:
constexpr static size_t PageSize = 0x1000'0000;
Provider() = default;
virtual ~Provider() = default;
@ -18,9 +21,24 @@ namespace hex::prv {
virtual void read(u64 offset, void *buffer, size_t size) = 0;
virtual void write(u64 offset, void *buffer, size_t size) = 0;
virtual size_t getSize() = 0;
virtual size_t getActualSize() = 0;
u32 getPageCount() { return std::ceil(this->getActualSize() / double(PageSize)); }
u32 getCurrentPage() const { return this->m_currPage; }
void setCurrentPage(u32 page) { if (page < getPageCount()) this->m_currPage = page; }
virtual size_t getBaseAddress() {
return PageSize * this->m_currPage;
}
virtual size_t getSize() {
return std::min(this->getActualSize() - PageSize * this->m_currPage, PageSize);
}
virtual std::vector<std::pair<std::string, std::string>> getDataInformation() = 0;
protected:
u32 m_currPage = 0;
};
}

5
include/views/view_information.hpp
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@ -23,13 +23,16 @@ namespace hex {
prv::Provider* &m_dataProvider;
bool m_windowOpen = true;
bool m_dataValid = false;
u32 m_blockSize = 0;
float m_averageEntropy = 0;
float m_highestBlockEntropy = 0;
std::vector<float> m_blockEntropy;
std::array<float, 256> m_valueCounts = { 0 };
bool m_shouldInvalidate = true;
bool m_shouldInvalidate = false;
std::pair<u64, u64> m_analyzedRegion = { 0, 0 };
std::string m_fileDescription;
std::string m_mimeType;

12
libs/ImGui/include/imgui_memory_editor.h
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@ -547,18 +547,6 @@ struct MemoryEditor
ImGui::SameLine();
ImGui::Text(format_range, s.AddrDigitsCount, base_display_addr, s.AddrDigitsCount, base_display_addr + mem_size - 1);
ImGui::SameLine();
ImGui::PushItemWidth((s.AddrDigitsCount + 1) * s.GlyphWidth + style.FramePadding.x * 2.0f);
if (ImGui::InputText("##addr", AddrInputBuf, 32, ImGuiInputTextFlags_CharsHexadecimal | ImGuiInputTextFlags_EnterReturnsTrue))
{
size_t goto_addr;
if (sscanf(AddrInputBuf, "%" _PRISizeT "X", &goto_addr) == 1)
{
GotoAddr = goto_addr - base_display_addr;
HighlightMin = HighlightMax = (size_t)-1;
}
}
ImGui::PopItemWidth();
if (GotoAddr != (size_t)-1)
{

9
source/provider/file_provider.cpp
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@ -22,7 +22,6 @@ namespace hex::prv {
this->m_file = fopen(path.data(), "rb");
this->m_writable = false;
}
}
FileProvider::~FileProvider() {
@ -48,7 +47,7 @@ namespace hex::prv {
if ((offset + size) > this->getSize() || buffer == nullptr || size == 0)
return;
fseeko64(this->m_file, offset, SEEK_SET);
fseeko64(this->m_file, this->getCurrentPage() * PageSize + offset, SEEK_SET);
fread(buffer, 1, size, this->m_file);
}
@ -56,11 +55,11 @@ namespace hex::prv {
if (buffer == nullptr || size == 0)
return;
fseeko64(this->m_file, offset, SEEK_SET);
fseeko64(this->m_file, this->getCurrentPage() * PageSize + offset, SEEK_SET);
fwrite(buffer, 1, size, this->m_file);
}
size_t FileProvider::getSize() {
size_t FileProvider::getActualSize() {
fseeko64(this->m_file, 0, SEEK_END);
return ftello64(this->m_file);
}
@ -69,7 +68,7 @@ namespace hex::prv {
std::vector<std::pair<std::string, std::string>> result;
result.emplace_back("File path", this->m_path);
result.emplace_back("Size", hex::toByteString(this->getSize()));
result.emplace_back("Size", hex::toByteString(this->getActualSize()));
if (this->m_fileStatsValid) {
result.emplace_back("Creation time", ctime(&this->m_fileStats.st_ctime));

42
source/views/view_hexeditor.cpp
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@ -70,9 +70,32 @@ namespace hex {
size_t dataSize = (this->m_dataProvider == nullptr || !this->m_dataProvider->isReadable()) ? 0x00 : this->m_dataProvider->getSize();
this->m_memoryEditor.DrawWindow("Hex Editor", this, dataSize);
this->m_memoryEditor.DrawWindow("Hex Editor", this, dataSize, dataSize == 0 ? 0x00 : this->m_dataProvider->getBaseAddress());
if (dataSize != 0x00) {
ImGui::Begin("Hex Editor");
ImGui::SameLine();
ImGui::Text("Page %d / %d", this->m_dataProvider->getCurrentPage() + 1, this->m_dataProvider->getPageCount());
ImGui::SameLine();
if (ImGui::ArrowButton("prevPage", ImGuiDir_Left)) {
this->m_dataProvider->setCurrentPage(this->m_dataProvider->getCurrentPage() - 1);
size_t dataPreviewStart = std::min(this->m_memoryEditor.DataPreviewAddr, this->m_memoryEditor.DataPreviewAddrEnd);
View::postEvent(Events::ByteSelected, &dataPreviewStart);
}
ImGui::SameLine();
if (ImGui::ArrowButton("nextPage", ImGuiDir_Right)) {
this->m_dataProvider->setCurrentPage(this->m_dataProvider->getCurrentPage() + 1);
size_t dataPreviewStart = std::min(this->m_memoryEditor.DataPreviewAddr, this->m_memoryEditor.DataPreviewAddrEnd);
View::postEvent(Events::ByteSelected, &dataPreviewStart);
}
ImGui::End();
this->drawSearchPopup();
this->drawGotoPopup();
}
@ -578,8 +601,8 @@ R"(
if (ImGui::BeginTabItem("Begin")) {
ImGui::InputScalar("##nolabel", ImGuiDataType_U64, &this->m_gotoAddress, nullptr, nullptr, "%llx", ImGuiInputTextFlags_CharsHexadecimal);
if (this->m_gotoAddress >= this->m_dataProvider->getSize())
this->m_gotoAddress = this->m_dataProvider->getSize() - 1;
if (this->m_gotoAddress >= this->m_dataProvider->getActualSize())
this->m_gotoAddress = this->m_dataProvider->getActualSize() - 1;
newOffset = this->m_gotoAddress;
@ -596,9 +619,9 @@ R"(
s64 currHighlightStart = std::min(this->m_memoryEditor.DataPreviewAddr, this->m_memoryEditor.DataPreviewAddrEnd);
newOffset = this->m_gotoAddress + currHighlightStart;
if (newOffset >= this->m_dataProvider->getSize()) {
newOffset = this->m_dataProvider->getSize() - 1;
this->m_gotoAddress = (this->m_dataProvider->getSize() - 1) - currHighlightStart;
if (newOffset >= this->m_dataProvider->getActualSize()) {
newOffset = this->m_dataProvider->getActualSize() - 1;
this->m_gotoAddress = (this->m_dataProvider->getActualSize() - 1) - currHighlightStart;
} else if (newOffset < 0) {
newOffset = 0;
this->m_gotoAddress = -currHighlightStart;
@ -609,15 +632,16 @@ R"(
if (ImGui::BeginTabItem("End")) {
ImGui::InputScalar("##nolabel", ImGuiDataType_U64, &this->m_gotoAddress, nullptr, nullptr, "%llx", ImGuiInputTextFlags_CharsHexadecimal);
if (this->m_gotoAddress >= this->m_dataProvider->getSize())
this->m_gotoAddress = this->m_dataProvider->getSize() - 1;
if (this->m_gotoAddress >= this->m_dataProvider->getActualSize())
this->m_gotoAddress = this->m_dataProvider->getActualSize() - 1;
newOffset = (this->m_dataProvider->getSize() - 1) - this->m_gotoAddress;
newOffset = (this->m_dataProvider->getActualSize() - 1) - this->m_gotoAddress;
ImGui::EndTabItem();
}
if (ImGui::Button("Goto")) {
this->m_dataProvider->setCurrentPage(std::floor(newOffset / double(prv::Provider::PageSize)));
this->m_memoryEditor.GotoAddr = newOffset;
this->m_memoryEditor.DataPreviewAddr = newOffset;
this->m_memoryEditor.DataPreviewAddrEnd = newOffset;

90
source/views/view_information.cpp
View File

@ -17,7 +17,15 @@ namespace hex {
ViewInformation::ViewInformation(prv::Provider* &dataProvider)
: View(), m_dataProvider(dataProvider) {
View::subscribeEvent(Events::DataChanged, [this](const void*) {
this->m_shouldInvalidate = true;
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_mimeType = "";
this->m_fileDescription = "";
this->m_analyzedRegion = { 0, 0 };
});
}
@ -48,6 +56,8 @@ namespace hex {
if (this->m_dataProvider != nullptr && this->m_dataProvider->isReadable()) {
if (this->m_shouldInvalidate) {
this->m_analyzedRegion = { this->m_dataProvider->getBaseAddress(), this->m_dataProvider->getBaseAddress() + this->m_dataProvider->getSize() };
{
this->m_blockSize = std::ceil(this->m_dataProvider->getSize() / 2048.0F);
std::vector<u8> buffer(this->m_blockSize, 0x00);
@ -70,7 +80,7 @@ namespace hex {
}
{
std::vector<u8> buffer(std::min(this->m_dataProvider->getSize(), size_t(0xFF'FFFF)), 0x00);
std::vector<u8> buffer(this->m_dataProvider->getSize(), 0x00);
this->m_dataProvider->read(0x00, buffer.data(), buffer.size());
this->m_fileDescription.clear();
@ -112,53 +122,67 @@ namespace hex {
this->m_shouldInvalidate = false;
this->m_dataValid = true;
}
}
ImGui::NewLine();
for (auto &[name, value] : this->m_dataProvider->getDataInformation()) {
ImGui::LabelText(name.c_str(), "%s", value.c_str());
}
if (ImGui::Button("Analyze current page"))
this->m_shouldInvalidate = true;
ImGui::NewLine();
ImGui::Separator();
ImGui::NewLine();
if (!this->m_fileDescription.empty()) {
ImGui::TextUnformatted("Description:");
ImGui::TextWrapped("%s", this->m_fileDescription.c_str());
if (this->m_dataValid) {
for (auto &[name, value] : this->m_dataProvider->getDataInformation()) {
ImGui::LabelText(name.c_str(), "%s", value.c_str());
}
ImGui::LabelText("Analyzed region", "0x%llx - 0x%llx", this->m_analyzedRegion.first, this->m_analyzedRegion.second);
ImGui::NewLine();
}
if (!this->m_mimeType.empty()) {
ImGui::TextUnformatted("MIME Type:");
ImGui::TextWrapped("%s", this->m_mimeType.c_str());
ImGui::Separator();
ImGui::NewLine();
}
ImGui::Separator();
ImGui::NewLine();
if (!this->m_fileDescription.empty()) {
ImGui::TextUnformatted("Description:");
ImGui::TextWrapped("%s", this->m_fileDescription.c_str());
ImGui::NewLine();
}
ImGui::Text("Byte Distribution");
ImGui::PlotHistogram("##nolabel", this->m_valueCounts.data(), 256, 0, nullptr, FLT_MAX, FLT_MAX, ImVec2(0, 100));
if (!this->m_mimeType.empty()) {
ImGui::TextUnformatted("MIME Type:");
ImGui::TextWrapped("%s", this->m_mimeType.c_str());
ImGui::NewLine();
}
ImGui::NewLine();
ImGui::Separator();
ImGui::NewLine();
ImGui::Text("Entropy");
ImGui::PlotLines("##nolabel", this->m_blockEntropy.data(), this->m_blockEntropy.size(), 0, nullptr, FLT_MAX, FLT_MAX, ImVec2(0, 100));
ImGui::NewLine();
ImGui::LabelText("Block size", "2048 blocks à %lu bytes", this->m_blockSize);
ImGui::LabelText("Average entropy", "%.8f", this->m_averageEntropy);
ImGui::LabelText("Highest entropy block", "%.8f", this->m_highestBlockEntropy);
if (this->m_averageEntropy > 0.83 && this->m_highestBlockEntropy > 0.9) {
ImGui::Separator();
ImGui::NewLine();
ImGui::TextColored(ImVec4(0.92F, 0.25F, 0.2F, 1.0F), "This data is most likely encrypted or compressed!");
ImGui::Text("Byte Distribution");
ImGui::PlotHistogram("##nolabel", this->m_valueCounts.data(), 256, 0, nullptr, FLT_MAX, FLT_MAX,ImVec2(0, 100));
ImGui::NewLine();
ImGui::Separator();
ImGui::NewLine();
ImGui::Text("Entropy");
ImGui::PlotLines("##nolabel", this->m_blockEntropy.data(), this->m_blockEntropy.size(), 0, nullptr, FLT_MAX, FLT_MAX, ImVec2(0, 100));
ImGui::NewLine();
ImGui::LabelText("Block size", "2048 blocks à %lu bytes", this->m_blockSize);
ImGui::LabelText("Average entropy", "%.8f", this->m_averageEntropy);
ImGui::LabelText("Highest entropy block", "%.8f", this->m_highestBlockEntropy);
if (this->m_averageEntropy > 0.83 && this->m_highestBlockEntropy > 0.9) {
ImGui::NewLine();
ImGui::TextColored(ImVec4(0.92F, 0.25F, 0.2F, 1.0F),"This data is most likely encrypted or compressed!");
}
}
}

4
source/views/view_strings.cpp
View File

@ -8,7 +8,7 @@ namespace hex {
ViewStrings::ViewStrings(prv::Provider* &dataProvider) : View(), m_dataProvider(dataProvider) {
View::subscribeEvent(Events::DataChanged, [this](const void*){
this->m_shouldInvalidate = true;
this->m_foundStrings.clear();
});
this->m_filter = new char[0xFFFF];
@ -64,6 +64,8 @@ namespace hex {
this->m_shouldInvalidate = true;
ImGui::InputText("Filter", this->m_filter, 0xFFFF);
if (ImGui::Button("Extract"))
this->m_shouldInvalidate = true;
ImGui::Separator();
ImGui::NewLine();