You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
physmeme/physmeme-lib/util/util.hpp

192 lines
6.2 KiB

#pragma once
5 years ago
#include <Windows.h>
#include <cstdint>
#include <string_view>
#include <iterator>
#include <fstream>
#include <string>
#include <map>
5 years ago
#include <vector>
#include <ntstatus.h>
#include <winternl.h>
5 years ago
#include "nt.hpp"
namespace util
{
//--- ranges of physical memory
static std::map<std::uintptr_t, std::size_t> pmem_ranges{};
//--- validates the address
static bool is_valid(std::uintptr_t addr)
{
for (auto range : pmem_ranges)
if (addr >= range.first && addr <= range.first + range.second)
return true;
return false;
}
// Author: Remy Lebeau
// taken from here: https://stackoverflow.com/questions/48485364/read-reg-resource-list-memory-values-incorrect-value
static const auto init_ranges = ([&]() -> bool
{
HKEY h_key;
DWORD type, size;
LPBYTE data;
RegOpenKeyEx(HKEY_LOCAL_MACHINE, "HARDWARE\\RESOURCEMAP\\System Resources\\Physical Memory", 0, KEY_READ, &h_key);
RegQueryValueEx(h_key, ".Translated", NULL, &type, NULL, &size); //get size
data = new BYTE[size];
RegQueryValueEx(h_key, ".Translated", NULL, &type, data, &size);
DWORD count = *(DWORD*)(data + 16);
auto pmi = data + 24;
for (int dwIndex = 0; dwIndex < count; dwIndex++)
{
pmem_ranges.emplace(*(uint64_t*)(pmi + 0), *(uint64_t*)(pmi + 8));
pmi += 20;
}
delete[] data;
RegCloseKey(h_key);
return true;
})();
5 years ago
// this was taken from wlan's drvmapper:
// https://github.com/not-wlan/drvmap/blob/98d93cc7b5ec17875f815a9cb94e6d137b4047ee/drvmap/util.cpp#L7
static void open_binary_file(const std::string& file, std::vector<uint8_t>& data)
{
std::ifstream fstr(file, std::ios::binary);
fstr.unsetf(std::ios::skipws);
fstr.seekg(0, std::ios::end);
const auto file_size = fstr.tellg();
fstr.seekg(NULL, std::ios::beg);
data.reserve(static_cast<uint32_t>(file_size));
data.insert(data.begin(), std::istream_iterator<uint8_t>(fstr), std::istream_iterator<uint8_t>());
}
// get base address of kernel module
//
// taken from: https://github.com/z175/kdmapper/blob/master/kdmapper/utils.cpp#L30
static std::uintptr_t get_module_base(const char* module_name)
{
void* buffer = nullptr;
DWORD buffer_size = NULL;
NTSTATUS status = NtQuerySystemInformation(static_cast<SYSTEM_INFORMATION_CLASS>(SystemModuleInformation), buffer, buffer_size, &buffer_size);
while (status == STATUS_INFO_LENGTH_MISMATCH)
{
VirtualFree(buffer, NULL, MEM_RELEASE);
buffer = VirtualAlloc(nullptr, buffer_size, MEM_COMMIT | MEM_RESERVE, PAGE_READWRITE);
status = NtQuerySystemInformation(static_cast<SYSTEM_INFORMATION_CLASS>(SystemModuleInformation), buffer, buffer_size, &buffer_size);
}
if (!NT_SUCCESS(status))
{
VirtualFree(buffer, NULL, MEM_RELEASE);
return NULL;
}
const auto modules = static_cast<PRTL_PROCESS_MODULES>(buffer);
for (auto idx = 0u; idx < modules->NumberOfModules; ++idx)
{
const std::string current_module_name = std::string(reinterpret_cast<char*>(modules->Modules[idx].FullPathName) + modules->Modules[idx].OffsetToFileName);
if (!_stricmp(current_module_name.c_str(), module_name))
{
const uint64_t result = reinterpret_cast<uint64_t>(modules->Modules[idx].ImageBase);
VirtualFree(buffer, NULL, MEM_RELEASE);
return result;
}
}
VirtualFree(buffer, NULL, MEM_RELEASE);
return NULL;
}
// get base address of kernel module
//
// taken from: https://github.com/z175/kdmapper/blob/master/kdmapper/utils.cpp#L30
static void* get_module_export(const char* module_name, const char* export_name, bool rva = false)
{
void* buffer = nullptr;
DWORD buffer_size = 0;
NTSTATUS status = NtQuerySystemInformation(static_cast<SYSTEM_INFORMATION_CLASS>(SystemModuleInformation), buffer, buffer_size, &buffer_size);
while (status == STATUS_INFO_LENGTH_MISMATCH)
{
VirtualFree(buffer, 0, MEM_RELEASE);
buffer = VirtualAlloc(nullptr, buffer_size, MEM_COMMIT | MEM_RESERVE, PAGE_READWRITE);
status = NtQuerySystemInformation(static_cast<SYSTEM_INFORMATION_CLASS>(SystemModuleInformation), buffer, buffer_size, &buffer_size);
}
if (!NT_SUCCESS(status))
{
VirtualFree(buffer, 0, MEM_RELEASE);
return 0;
}
const auto modules = static_cast<PRTL_PROCESS_MODULES>(buffer);
for (auto idx = 0u; idx < modules->NumberOfModules; ++idx)
{
// find module and then load library it
const std::string current_module_name = std::string(reinterpret_cast<char*>(modules->Modules[idx].FullPathName) + modules->Modules[idx].OffsetToFileName);
if (!_stricmp(current_module_name.c_str(), module_name))
{
// had to shoot the tires off of "\\SystemRoot\\"
std::string full_path = reinterpret_cast<char*>(modules->Modules[idx].FullPathName);
full_path.replace(
full_path.find("\\SystemRoot\\"),
sizeof("\\SystemRoot\\") - 1,
std::string(getenv("SYSTEMROOT")).append("\\")
);
auto module_base = LoadLibraryA(full_path.c_str());
PIMAGE_DOS_HEADER p_idh;
PIMAGE_NT_HEADERS p_inh;
PIMAGE_EXPORT_DIRECTORY p_ied;
PDWORD addr, name;
PWORD ordinal;
p_idh = (PIMAGE_DOS_HEADER)module_base;
if (p_idh->e_magic != IMAGE_DOS_SIGNATURE)
return NULL;
p_inh = (PIMAGE_NT_HEADERS)((LPBYTE)module_base + p_idh->e_lfanew);
if (p_inh->Signature != IMAGE_NT_SIGNATURE)
return NULL;
if (p_inh->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_EXPORT].VirtualAddress == 0)
return NULL;
p_ied = (PIMAGE_EXPORT_DIRECTORY)((LPBYTE)module_base +
p_inh->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_EXPORT].VirtualAddress);
addr = (PDWORD)((LPBYTE)module_base + p_ied->AddressOfFunctions);
name = (PDWORD)((LPBYTE)module_base + p_ied->AddressOfNames);
ordinal = (PWORD)((LPBYTE)module_base + p_ied->AddressOfNameOrdinals);
// find exported function
for (auto i = 0; i < p_ied->AddressOfFunctions; i++)
if (!strcmp(export_name, (char*)module_base + name[i]))
{
if (!rva)
{
auto result = (void*)((std::uintptr_t)modules->Modules[idx].ImageBase + addr[ordinal[i]]);
VirtualFree(buffer, NULL, MEM_RELEASE);
return result;
}
else
{
auto result = (void*)addr[ordinal[i]];
VirtualFree(buffer, NULL, MEM_RELEASE);
return result;
}
}
}
}
VirtualFree(buffer, NULL, MEM_RELEASE);
return NULL;
}
}