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feat: Added support for automatically loading patterns using binary pattern magic

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This commit is contained in:
WerWolv 2023-05-22 00:01:58 +02:00
parent df75218ecb
commit e7b51a56a5
6 changed files with 179 additions and 66 deletions
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2
lib/external/pattern_language vendored

@ -1 +1 @@
Subproject commit 157436f55f681fc3b59264741cd9f49ec036cb65
Subproject commit 49f3fb30dcb3044a2bb535958b7b954c81ec23ef

103
lib/libimhex/include/hex/helpers/binary_pattern.hpp Normal file
View File

@ -0,0 +1,103 @@
#pragma once
#include <hex.hpp>
#include <hex/helpers/utils.hpp>
#include <vector>
namespace hex {
class BinaryPattern {
public:
struct Pattern {
u8 mask, value;
};
BinaryPattern() = default;
explicit BinaryPattern(const std::string &pattern) : m_patterns(parseBinaryPatternString(pattern)) { }
[[nodiscard]] bool isValid() const { return !this->m_patterns.empty(); }
[[nodiscard]] bool matches(const std::vector<u8> &bytes) const {
if (bytes.size() < this->m_patterns.size())
return false;
for (u32 i = 0; i < this->m_patterns.size(); i++) {
if (!this->matchesByte(bytes[i], i))
return false;
}
return true;
}
[[nodiscard]] bool matchesByte(u8 byte, u32 offset) const {
const auto &pattern = this->m_patterns[offset];
return (byte & pattern.mask) == pattern.value;
}
[[nodiscard]] size_t getSize() const {
return this->m_patterns.size();
}
private:
static std::vector<Pattern> parseBinaryPatternString(std::string string) {
std::vector<Pattern> result;
if (string.length() < 2)
return { };
bool inString = false;
while (string.length() > 0) {
Pattern pattern = { 0, 0 };
if (string.starts_with("\"")) {
inString = !inString;
string = string.substr(1);
continue;
} else if (inString) {
pattern = { 0xFF, u8(string.front()) };
string = string.substr(1);
} else if (string.starts_with("??")) {
pattern = { 0x00, 0x00 };
string = string.substr(2);
} else if ((std::isxdigit(string.front()) || string.front() == '?') && string.length() >= 2) {
const auto hex = string.substr(0, 2);
for (const auto &c : hex) {
pattern.mask <<= 4;
pattern.value <<= 4;
if (std::isxdigit(c)) {
pattern.mask |= 0x0F;
if (auto hexValue = hex::hexCharToValue(c); hexValue.has_value())
pattern.value |= hexValue.value();
else
return { };
} else if (c != '?') {
return { };
}
}
string = string.substr(2);
} else if (std::isspace(string.front())) {
string = string.substr(1);
continue;
} else {
return { };
}
result.push_back(pattern);
}
if (inString)
return { };
return result;
}
private:
std::vector<Pattern> m_patterns;
};
}

3
plugins/builtin/include/content/views/view_find.hpp
View File

@ -4,6 +4,7 @@
#include <hex/api/task.hpp>
#include <hex/ui/view.hpp>
#include <hex/helpers/binary_pattern.hpp>
#include <ui/widgets.hpp>
#include <atomic>
@ -76,7 +77,7 @@ namespace hex::plugin::builtin {
struct BinaryPattern {
std::string input;
std::vector<ViewFind::BinaryPattern> pattern;
hex::BinaryPattern pattern;
u32 alignment = 1;
} binaryPattern;

6
plugins/builtin/source/content/pl_pragmas.cpp
View File

@ -1,6 +1,8 @@
#include <hex/api/content_registry.hpp>
#include <hex/providers/provider.hpp>
#include <hex/helpers/magic.hpp>
#include <hex/helpers/binary_pattern.hpp>
#include <optional>
#include <pl/core/evaluator.hpp>
@ -20,6 +22,10 @@ namespace hex::plugin::builtin {
ContentRegistry::PatternLanguage::addPragma("MIME", [](pl::PatternLanguage&, const std::string &value) {
return magic::isValidMIMEType(value);
});
ContentRegistry::PatternLanguage::addPragma("magic", [](pl::PatternLanguage&, const std::string &) {
return true;
});
}
}

72
plugins/builtin/source/content/views/view_find.cpp
View File

@ -22,7 +22,7 @@ namespace hex::plugin::builtin {
if (this->m_searchTask.isRunning())
return { };
if (!this->m_occurrenceTree->overlapping({ address, address }).empty())
if (!this->m_occurrenceTree->overlapping({ address, address + size }).empty())
return HighlightColor();
else
return std::nullopt;
@ -34,7 +34,7 @@ namespace hex::plugin::builtin {
if (this->m_searchTask.isRunning())
return;
auto occurrences = this->m_occurrenceTree->overlapping({ address, address });
auto occurrences = this->m_occurrenceTree->overlapping({ address, address + size });
if (occurrences.empty())
return;
@ -93,62 +93,6 @@ namespace hex::plugin::builtin {
});
}
std::vector<ViewFind::BinaryPattern> ViewFind::parseBinaryPatternString(std::string string) {
std::vector<BinaryPattern> result;
if (string.length() < 2)
return { };
bool inString = false;
while (string.length() > 0) {
BinaryPattern pattern = { 0, 0 };
if (string.starts_with("\"")) {
inString = !inString;
string = string.substr(1);
continue;
} else if (inString) {
pattern = { 0xFF, u8(string.front()) };
string = string.substr(1);
} else if (string.starts_with("??")) {
pattern = { 0x00, 0x00 };
string = string.substr(2);
} else if ((std::isxdigit(string.front()) || string.front() == '?') && string.length() >= 2) {
const auto hex = string.substr(0, 2);
for (const auto &c : hex) {
pattern.mask <<= 4;
pattern.value <<= 4;
if (std::isxdigit(c)) {
pattern.mask |= 0x0F;
if (auto hexValue = hex::hexCharToValue(c); hexValue.has_value())
pattern.value |= hexValue.value();
else
return { };
} else if (c != '?') {
return { };
}
}
string = string.substr(2);
} else if (std::isspace(string.front())) {
string = string.substr(1);
continue;
} else {
return { };
}
result.push_back(pattern);
}
if (inString)
return { };
return result;
}
template<typename Type, typename StorageType>
static std::tuple<bool, std::variant<u64, i64, float, double>, size_t> parseNumericValue(const std::string &string) {
static_assert(sizeof(StorageType) >= sizeof(Type));
@ -365,7 +309,7 @@ namespace hex::plugin::builtin {
reader.seek(searchRegion.getStartAddress());
reader.setEndAddress(searchRegion.getEndAddress());
const size_t patternSize = settings.pattern.size();
const size_t patternSize = settings.pattern.getSize();
if (settings.alignment == 1) {
u32 matchedBytes = 0;
@ -373,9 +317,9 @@ namespace hex::plugin::builtin {
auto byte = *it;
task.update(it.getAddress());
if ((byte & settings.pattern[matchedBytes].mask) == settings.pattern[matchedBytes].value) {
if (settings.pattern.matchesByte(byte, matchedBytes)) {
matchedBytes++;
if (matchedBytes == settings.pattern.size()) {
if (matchedBytes == settings.pattern.getSize()) {
auto occurrenceAddress = it.getAddress() - (patternSize - 1);
results.push_back(Occurrence { Region { occurrenceAddress, patternSize }, Occurrence::DecodeType::Binary, std::endian::native });
@ -397,7 +341,7 @@ namespace hex::plugin::builtin {
bool match = true;
for (u32 i = 0; i < patternSize; i++) {
if ((data[i] & settings.pattern[i].mask) != settings.pattern[i].value) {
if (settings.pattern.matchesByte(data[i], i)) {
match = false;
break;
}
@ -693,8 +637,8 @@ namespace hex::plugin::builtin {
constexpr static u32 min = 1, max = 0x1000;
ImGui::SliderScalar("hex.builtin.view.find.binary_pattern.alignment"_lang, ImGuiDataType_U32, &settings.alignment, &min, &max);
settings.pattern = parseBinaryPatternString(settings.input);
this->m_settingsValid = !settings.pattern.empty() && settings.alignment > 0;
settings.pattern = hex::BinaryPattern(settings.input);
this->m_settingsValid = settings.pattern.isValid() && settings.alignment > 0;
ImGui::EndTabItem();
}

59
plugins/builtin/source/content/views/view_pattern_editor.cpp
View File

@ -13,6 +13,7 @@
#include <hex/helpers/utils.hpp>
#include <hex/api/project_file_manager.hpp>
#include <hex/helpers/magic.hpp>
#include <hex/helpers/binary_pattern.hpp>
#include <content/popups/popup_file_chooser.hpp>
#include <content/popups/popup_question.hpp>
@ -765,6 +766,64 @@ namespace hex::plugin::builtin {
return !std::all_of(value.begin(), value.end(), isspace) && !value.ends_with('\n') && !value.ends_with('\r');
});
// Format: [ AA BB CC DD ] @ 0x12345678
runtime.addPragma("magic", [provider, &foundCorrectType](pl::PatternLanguage &, const std::string &value) -> bool {
const auto pattern = [value = value] mutable -> std::optional<BinaryPattern> {
value = wolv::util::trim(value);
if (value.empty())
return std::nullopt;
if (!value.starts_with('['))
return std::nullopt;
value = value.substr(1);
auto end = value.find(']');
if (end == std::string::npos)
return std::nullopt;
value = value.substr(0, end - 1);
value = wolv::util::trim(value);
return BinaryPattern(value);
}();
const auto address = [value = value] mutable -> std::optional<u64> {
value = wolv::util::trim(value);
if (value.empty())
return std::nullopt;
auto start = value.find('@');
if (start == std::string::npos)
return std::nullopt;
value = value.substr(start + 1);
value = wolv::util::trim(value);
size_t end = 0;
auto result = std::stoull(value, &end, 0);
if (end != value.length())
return std::nullopt;
return result;
}();
if (!address)
return false;
if (!pattern)
return false;
std::vector<u8> bytes(pattern->getSize());
provider->read(*address, bytes.data(), bytes.size());
if (pattern->matches(bytes))
foundCorrectType = true;
return true;
});
this->m_possiblePatternFiles.clear();
std::error_code errorCode;