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44 lines
1.4 KiB
C++
44 lines
1.4 KiB
C++
//
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// Created by Vlad on 10/7/2025.
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//
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#include "omath/utility/pe_pattern_scan.hpp"
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#include "omath/utility/pattern_scan.hpp"
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#include <span>
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#include <stdexcept>
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#ifdef _WIN32
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#include <Windows.h>
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#endif
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namespace omath
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{
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std::optional<std::uintptr_t>
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PePatternScanner::scan_for_pattern_in_loaded_module(const std::string_view& module_name,
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const std::string_view& pattern)
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{
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#ifdef _WIN32
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const auto base_address = reinterpret_cast<std::uintptr_t>(GetModuleHandleA(module_name.data()));
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if (!base_address)
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return std::nullopt;
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const auto dos_headers = reinterpret_cast<PIMAGE_DOS_HEADER>(base_address);
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const auto image_nt_headers = reinterpret_cast<PIMAGE_NT_HEADERS>(base_address + dos_headers->e_lfanew);
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// Define .code segment as scan area
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const auto start = image_nt_headers->OptionalHeader.BaseOfCode;
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const auto scan_size = image_nt_headers->OptionalHeader.SizeOfCode;
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const auto scan_range = std::span{reinterpret_cast<std::byte*>(base_address) + start, scan_size};
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const auto result = PatternScanner::scan_for_pattern(scan_range, pattern);
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if (result != scan_range.cend())
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return reinterpret_cast<std::uintptr_t>(&*result);
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return std::nullopt;
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#else
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throw std::runtime_error("Pattern scan for loaded modules is only for windows platform");
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#endif
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}
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} // namespace omath
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