这是从数据目录中获取每个表的地址

void PE::Analyze_Data_Directory(Data& my_data)
{
	my_data.my_Data_Directory = nullptr;
	my_data.my_Data_Directory = (PIMAGE_DATA_DIRECTORY*)malloc(16 * sizeof(PIMAGE_DATA_DIRECTORY));
	void* Temp_ptr = my_data.my_optional->DataDirectory;
	for (int i = 0; i < 16; i++)
	{
		my_data.my_Data_Directory[i] = (PIMAGE_DATA_DIRECTORY)Temp_ptr;
		Temp_ptr = (char*)Temp_ptr + 0x8;
	}
}

打印所有导出表的信息：

void PE::Print_ExportTable(Data& my_data)
{
	PIMAGE_EXPORT_DIRECTORY my_export_directory_ptr = (PIMAGE_EXPORT_DIRECTORY)((DWORD)my_data.my_Data_Directory[0]->VirtualAddress + (DWORD)my_data.Stretch_Data);
	my_data.my_Export_Directory = my_export_directory_ptr;
	DWORD AddressOfFunctions_ptr = (DWORD)((DWORD)my_export_directory_ptr->AddressOfFunctions + (DWORD)my_data.Stretch_Data);
	DWORD AddressOfNames_ptr = (DWORD)((DWORD)my_export_directory_ptr->AddressOfNames + (DWORD)my_data.Stretch_Data);
	DWORD AddressOfNameOrdinals_ptr = (DWORD)((DWORD)my_export_directory_ptr->AddressOfNameOrdinals + (DWORD)my_data.Stretch_Data);
	cout << "---------------AddressOfFunctions------------------" << endl;
	int number = my_export_directory_ptr->NumberOfFunctions;
	for (int i = 0; i < number; i++)
	{
		cout << i << ": " << "0x" << hex << *((DWORD*)AddressOfFunctions_ptr) << endl;
		my_data.Export_AddressOfFunction[i] = *((DWORD*)AddressOfFunctions_ptr);
		AddressOfFunctions_ptr += 0x4;
		while (*((DWORD*)AddressOfFunctions_ptr) == 0)
		{
			AddressOfFunctions_ptr += 0x4;
		}
	}
	cout << "---------------------Names------------------" << endl;
	number = my_export_directory_ptr->NumberOfNames;
	for (int i = 0; i < number; i++)
	{
		strcpy_s(my_data.my_Export_Name[i], (PCHAR)(*(DWORD*)AddressOfNames_ptr + (DWORD)my_data.Stretch_Data));
		cout << i << ": " << (PCHAR)(*(DWORD*)AddressOfNames_ptr + (DWORD)my_data.Stretch_Data) << endl;
		AddressOfNames_ptr += 0x4;
	}
	cout << "----------------------NameOrdinals---------------" << endl;
	cout << "base: " << my_export_directory_ptr->Base << endl;
	for (int i = 0; i < number; i++)
	{
		cout << i << ": " << *(WORD*)AddressOfNames_ptr << endl;
		AddressOfNames_ptr += 0x2;
	}
}

通过函数名称获取函数在DLL的偏移：

VOID PE::GetFunctionAddrByName(Data& my_data, char* name)
{
	int i = 0;
	for (i = 0; i < my_data.my_Export_Directory->NumberOfNames; i++)
	{
		if (!strcmp(name, my_data.my_Export_Name[i]))
		{
			cout << "成功通过函数名匹配到函数！" << endl;
			break;
		}
		if (i == my_data.my_Export_Directory->NumberOfNames - 1)
		{
			cout << "没有匹配到函数名!" << endl;
			return ;
		}
	}
	cout << "0x" << hex << my_data.Export_AddressOfFunction[i] << endl;
	
}

通过函数的序号获取函数在DLL的偏移

VOID PE::GetFunctionAddrByOrdinal(Data& my_data, int ordinal)
{
	DWORD AddressOfNames_ptr = (DWORD)((DWORD)my_data.my_Export_Directory->AddressOfNameOrdinals + (DWORD)my_data.Stretch_Data);
	for (int i = 0; i < my_data.my_Export_Directory->NumberOfNames; i++)
	{
		if (*(WORD*)AddressOfNames_ptr + my_data.my_Export_Directory->Base == ordinal)
		{
			cout << "成功通过函数的序号找到函数地址！" << endl;
			cout << "0x" << hex << my_data.Export_AddressOfFunction[i] << endl;
			return;
		}
		AddressOfNames_ptr = (DWORD)((char*)AddressOfNames_ptr + 2);
	}
	cout << "没有匹配上!" << endl;
}

完整的代码如下，可以直接改DLL名字完美运行：

#include 
#include 
#include 
#include 
#include 
using namespace std;
#pragma comment(lib,"Dll1.lib") 
extern  __declspec(dllimport)  void Print();
int MAX(int a, int b)
{
	return a >= b ? a : b;
}
class Data
{
public:
	PIMAGE_DOS_HEADER my_dos;//dos头结构
	PIMAGE_FILE_HEADER my_file;//file结构
	PIMAGE_OPTIONAL_HEADER32 my_optional;//可选PE头结构
	PIMAGE_SECTION_HEADER* my_section;//节表结构
	PIMAGE_DATA_DIRECTORY* my_Data_Directory;//数据目录结构
	//0.导出表	1.导入表	2.资源表	3.异常信息表	4.安全证书表	5.重定位表	6.调试信息表	7.版权所以表	
	//8.全局指针表	9.TLS表	10.加载配置表	11.绑定导入表	12.IAT表	13.延迟绑定表	14.COM信息表	15.未使用
	CHAR my_Export_Name[50][30];//导出表的名字
	PIMAGE_EXPORT_DIRECTORY my_Export_Directory; //指向导出表结构的指针
	DWORD	Export_AddressOfFunction[50];
	void* Before_Stretch_Data; //指向拉伸前的内容
	void* Stretch_Data; //指向拉伸后的内容
	void* Shrink_Data; //指向缩小PE结构的内容
	Data()
	{
		my_dos = nullptr;//dos头结构
		my_file = nullptr;//file结构
		my_optional = nullptr;//可选PE头结构
		my_section = nullptr;//节表结构
		my_Data_Directory = nullptr;
		Before_Stretch_Data = nullptr; //指向拉伸前的内容
		Stretch_Data = nullptr; //指向拉伸后的内容
		Shrink_Data = nullptr; //指向缩小PE结构的内容
	}
	~Data()
	{
		if (Before_Stretch_Data != nullptr)
		{
			free(Before_Stretch_Data);
			Before_Stretch_Data = nullptr;
		}
		if (Stretch_Data != nullptr)
		{
			free(Stretch_Data);
			Stretch_Data = nullptr;
		}
		if (Shrink_Data != nullptr)
		{
			free(Shrink_Data);
			Shrink_Data = nullptr;
		}
	}
	VOID Copy_Before_Strectch_Data(Data my_data); //只深拷贝Before_Strectch_Data
};
VOID Data::Copy_Before_Strectch_Data(Data my_data)
{
	int size = _msize(my_data.Before_Stretch_Data);
	memcpy_s(this->Before_Stretch_Data, size, my_data.Before_Stretch_Data, size);
}
class PE
{
public:
	VOID Readfile(char* filename, Data& my_data);  //读取pe文件
	VOID Analyze_PE(Data& my_data, int num);  //分析pe结构
	VOID Stretch_PE(Data& my_data);  //拉伸pe结构
	VOID Shrink_PE(Data& my_data); //缩小pe结构
	VOID New_Section(char* filename, Data& my_data);//新增节，非扩大节，并写入新的exe文件中
	VOID Expand_Section(Data& my_data, char* filename);  //扩大节
	int Section_Align(int temp, Data& my_data); //返回内存对齐后的大小
	int File_Align(int temp, Data& my_data); //返回文件对齐后的大小
	VOID Combine_Section(char* filename, Data& my_data);
	VOID Copy_Data(Data& my_data);
	VOID Print_IMAGE_DATA_DIRECTORY(Data& my_data);
	VOID Analyze_Data_Directory(Data& my_data);
	DWORD  Rva_To_Foa(DWORD Rva_Offset, Data& my_data);
	VOID Print_ExportTable(Data& my_data);
	VOID GetFunctionAddrByName(Data& my_data, char* name);
	VOID GetFunctionAddrByOrdinal(Data& my_data, int ordinal);
};
VOID PE::GetFunctionAddrByOrdinal(Data& my_data, int ordinal)
{
	DWORD AddressOfNames_ptr = (DWORD)((DWORD)my_data.my_Export_Directory->AddressOfNameOrdinals + (DWORD)my_data.Stretch_Data);
	for (int i = 0; i < my_data.my_Export_Directory->NumberOfNames; i++)
	{
		if (*(WORD*)AddressOfNames_ptr + my_data.my_Export_Directory->Base == ordinal)
		{
			cout << "成功通过函数的序号找到函数地址！" << endl;
			cout << "0x" << hex << my_data.Export_AddressOfFunction[i] << endl;
			return;
		}
		AddressOfNames_ptr = (DWORD)((char*)AddressOfNames_ptr + 2);
	}
	cout << "没有匹配上!" << endl;
}
VOID PE::GetFunctionAddrByName(Data& my_data, char* name)
{
	int i = 0;
	for (i = 0; i < my_data.my_Export_Directory->NumberOfNames; i++)
	{
		if (!strcmp(name, my_data.my_Export_Name[i]))
		{
			cout << "成功通过函数名匹配到函数！" << endl;
			break;
		}
		if (i == my_data.my_Export_Directory->NumberOfNames - 1)
		{
			cout << "没有匹配到函数名!" << endl;
			return ;
		}
	}
	cout << "0x" << hex << my_data.Export_AddressOfFunction[i] << endl;
	
}
void PE::Print_ExportTable(Data& my_data)
{
	PIMAGE_EXPORT_DIRECTORY my_export_directory_ptr = (PIMAGE_EXPORT_DIRECTORY)((DWORD)my_data.my_Data_Directory[0]->VirtualAddress + (DWORD)my_data.Stretch_Data);
	my_data.my_Export_Directory = my_export_directory_ptr;
	DWORD AddressOfFunctions_ptr = (DWORD)((DWORD)my_export_directory_ptr->AddressOfFunctions + (DWORD)my_data.Stretch_Data);
	DWORD AddressOfNames_ptr = (DWORD)((DWORD)my_export_directory_ptr->AddressOfNames + (DWORD)my_data.Stretch_Data);
	DWORD AddressOfNameOrdinals_ptr = (DWORD)((DWORD)my_export_directory_ptr->AddressOfNameOrdinals + (DWORD)my_data.Stretch_Data);
	cout << "---------------AddressOfFunctions------------------" << endl;
	int number = my_export_directory_ptr->NumberOfFunctions;
	for (int i = 0; i < number; i++)
	{
		cout << i << ": " << "0x" << hex << *((DWORD*)AddressOfFunctions_ptr) << endl;
		my_data.Export_AddressOfFunction[i] = *((DWORD*)AddressOfFunctions_ptr);
		AddressOfFunctions_ptr += 0x4;
		while (*((DWORD*)AddressOfFunctions_ptr) == 0)
		{
			AddressOfFunctions_ptr += 0x4;
		}
	}
	cout << "---------------------Names------------------" << endl;
	number = my_export_directory_ptr->NumberOfNames;
	for (int i = 0; i < number; i++)
	{
		strcpy_s(my_data.my_Export_Name[i], (PCHAR)(*(DWORD*)AddressOfNames_ptr + (DWORD)my_data.Stretch_Data));
		cout << i << ": " << (PCHAR)(*(DWORD*)AddressOfNames_ptr + (DWORD)my_data.Stretch_Data) << endl;
		AddressOfNames_ptr += 0x4;
	}
	cout << "----------------------NameOrdinals---------------" << endl;
	cout << "base: " << my_export_directory_ptr->Base << endl;
	for (int i = 0; i < number; i++)
	{
		cout << i << ": " << *(WORD*)AddressOfNames_ptr << endl;
		AddressOfNames_ptr += 0x2;
	}
}
DWORD PE::Rva_To_Foa(DWORD Rva_Offset, Data& my_data)
{
	int index = 0;
	if (Rva_Offset <= my_data.my_optional->SizeOfHeaders)
	{
		return Rva_Offset;
	}
	else
	{
		while (Rva_Offset > my_data.my_section[index]->VirtualAddress)
		{
			index++;
		}
		index--;
		//计算在节的偏移
		DWORD Section_Offset = Rva_Offset - my_data.my_section[index]->VirtualAddress;
		return my_data.my_section[index]->PointerToRawData + Section_Offset;
	}
}
void PE::Analyze_Data_Directory(Data& my_data)
{
	my_data.my_Data_Directory = nullptr;
	my_data.my_Data_Directory = (PIMAGE_DATA_DIRECTORY*)malloc(16 * sizeof(PIMAGE_DATA_DIRECTORY));
	void* Temp_ptr = my_data.my_optional->DataDirectory;
	for (int i = 0; i < 16; i++)
	{
		my_data.my_Data_Directory[i] = (PIMAGE_DATA_DIRECTORY)Temp_ptr;
		Temp_ptr = (char*)Temp_ptr + 0x8;
	}
}
void PE::Print_IMAGE_DATA_DIRECTORY(Data& my_data)
{
	char arr[16][40] = {
	"IMAGE_DIRECTORY_ENTRY_EXPORT",
	"IMAGE_DIRECTORY_ENTRY_IMPORT",
	"IMAGE_DIRECTORY_ENTRY_RESOURCE",
	"IMAGE_DIRECTORY_ENTRY_EXCEPTION",
	"IMAGE_DIRECTORY_ENTRY_SECURITY",
	"IMAGE_DIRECTORY_ENTRY_BASERELOC",
	"IMAGE_DIRECTORY_ENTRY_DEBUG",
	"IMAGE_DIRECTORY_ENTRY_COPYRIGHT",
	"IMAGE_DIRECTORY_ENTRY_GLOBALPTR",
	"IMAGE_DIRECTORY_ENTRY_TLS",
	"IMAGE_DIRECTORY_ENTRY_LOAD_CONFIG",
	"IMAGE_DIRECTORY_ENTRY_BOUND_IMPORT",
	"IMAGE_DIRECTORY_ENTRY_IAT",
	"IMAGE_DIRECTORY_ENTRY_DELAY_IMPORT",
	"IMAGE_DIRECTORY_ENTRY_COM_DESCRIPTOR",
	"RESERVED"
	};
	for (int i = 0; i < 16; i++)
	{
		cout << arr[i] << " :" << endl;
		cout << "Size: " << hex << my_data.my_Data_Directory[i]->Size << endl;
		cout << "Virtual_Address: " << my_data.my_Data_Directory[i]->VirtualAddress << endl;
		cout << "------------------------------------------------------------------------" << endl;
	}
	return;
}
void PE::Combine_Section(char* filename, Data& my_data)
{
	int Max = MAX(my_data.my_section[my_data.my_file->NumberOfSections - 1]->SizeOfRawData, my_data.my_section[my_data.my_file->NumberOfSections - 1]->Misc.VirtualSize);
	int Size = my_data.my_section[my_data.my_file->NumberOfSections - 1]->VirtualAddress + Section_Align(Max, my_data) - Section_Align(my_data.my_optional->SizeOfHeaders, my_data) + MAX(my_data.my_section[0]->SizeOfRawData, my_data.my_section[0]->Misc.VirtualSize);
	Data Comebine_Data;
	int temp_size = _msize(my_data.Stretch_Data) + Max;
	Comebine_Data.Stretch_Data = (void*)malloc(temp_size);
	memset(Comebine_Data.Stretch_Data, 0, Size);
	temp_size = _msize(my_data.Stretch_Data);
	memcpy_s(Comebine_Data.Stretch_Data, temp_size, my_data.Stretch_Data, temp_size);
	Analyze_PE(Comebine_Data, 2);
	void* temp_ptr = (char*)Comebine_Data.Stretch_Data + Max + my_data.my_section[my_data.my_file->NumberOfSections - 1]->VirtualAddress;
	memcpy_s(temp_ptr, MAX(my_data.my_section[0]->SizeOfRawData, my_data.my_section[0]->Misc.VirtualSize), my_data.my_section[0]->VirtualAddress + (char*)my_data.Stretch_Data, MAX(my_data.my_section[0]->SizeOfRawData, my_data.my_section[0]->Misc.VirtualSize));
	Comebine_Data.my_optional->SizeOfImage += Section_Align(MAX(my_data.my_section[0]->SizeOfRawData, my_data.my_section[0]->Misc.VirtualSize), my_data);
	Comebine_Data.my_section[my_data.my_file->NumberOfSections - 1]->SizeOfRawData += File_Align(MAX(my_data.my_section[0]->SizeOfRawData, my_data.my_section[0]->Misc.VirtualSize), my_data);
	Comebine_Data.my_section[my_data.my_file->NumberOfSections - 1]->Misc.VirtualSize = Section_Align(Comebine_Data.my_section[my_data.my_file->NumberOfSections - 1]->Misc.VirtualSize, my_data) + Section_Align(MAX(my_data.my_section[0]->SizeOfRawData, my_data.my_section[0]->Misc.VirtualSize), my_data);
	FILE* my_file;
	if (fopen_s(&my_file, filename, "wb") != 0)
	{
		cout << "打开文件失败" << endl;
		return;
	}
	Shrink_PE(Comebine_Data);
	Analyze_PE(Comebine_Data, 3);
	fwrite(Comebine_Data.Shrink_Data, 1, _msize(Comebine_Data.Shrink_Data), my_file);
	cout << "写入成功！" << endl;
	fclose(my_file);
}
void PE::Expand_Section(Data& my_data, char* filename)
{
	this->Stretch_PE(my_data);
	unsigned Size = 0;//扩大节后新的文件大小
	Size = my_data.my_optional->ImageBase + Section_Align(MAX(my_data.my_section[0]->SizeOfRawData, my_data.my_section[0]->Misc.VirtualSize), my_data);
	Data Expand_Data;
	Expand_Data.Stretch_Data = (void*)malloc(Size);
	memset(Expand_Data.Stretch_Data, 0, Size);
	memcpy_s(Expand_Data.Stretch_Data, _msize(my_data.Stretch_Data), my_data.Stretch_Data, _msize(my_data.Stretch_Data));
	Analyze_PE(Expand_Data, 2);
	Expand_Data.my_section[my_data.my_file->NumberOfSections - 1]->SizeOfRawData = Section_Align(MAX(my_data.my_section[0]->SizeOfRawData, my_data.my_section[0]->Misc.VirtualSize), my_data) + Section_Align(MAX(my_data.my_section[my_data.my_file->NumberOfSections - 1]->SizeOfRawData, my_data.my_section[my_data.my_file->NumberOfSections - 1]->Misc.VirtualSize), my_data);
	Expand_Data.my_section[my_data.my_file->NumberOfSections - 1]->Misc.VirtualSize = Expand_Data.my_section[my_data.my_file->NumberOfSections - 1]->SizeOfRawData;
	Expand_Data.my_optional->SizeOfImage += Section_Align(MAX(my_data.my_section[0]->SizeOfRawData, my_data.my_section[0]->Misc.VirtualSize), my_data);
	void* Temp_Ptr = (char*)Expand_Data.Stretch_Data + Expand_Data.my_section[Expand_Data.my_file->NumberOfSections - 1]->VirtualAddress + Section_Align(MAX(my_data.my_section[Expand_Data.my_file->NumberOfSections - 1]->SizeOfRawData, my_data.my_section[Expand_Data.my_file->NumberOfSections - 1]->Misc.VirtualSize), my_data);
	int temp_size = Section_Align(MAX(my_data.my_section[0]->SizeOfRawData, my_data.my_section[0]->Misc.VirtualSize), my_data);
	void* Temp_Ptr2 = (char*)my_data.Stretch_Data + my_data.my_section[0]->VirtualAddress;
	memcpy_s(Temp_Ptr, temp_size, Temp_Ptr2, temp_size);
	Shrink_PE(Expand_Data);
	FILE* my_file;
	if (fopen_s(&my_file, filename, "wb") != 0)
	{
		cout << "打开文件失败！" << endl;
	}
	else
	{
		Size = _msize(Expand_Data.Shrink_Data);
		fwrite(Expand_Data.Shrink_Data, 1, Size, my_file);
		cout << "写入成功！" << endl;
	}
	fclose(my_file);
}
int PE::Section_Align(int temp, Data& my_data)
{
	int i = 0;
	while (temp > i * my_data.my_optional->SectionAlignment)
	{
		i++;
	}
	return i * my_data.my_optional->SectionAlignment;
}
int PE::File_Align(int temp, Data& my_data)
{
	int i = 0;
	while (temp > i * my_data.my_optional->FileAlignment)
	{
		i++;
	}
	return i * my_data.my_optional->FileAlignment;
}
void PE::New_Section(char* filename, Data& my_data)
{
	unsigned int Size; //Size是新文件的大小，是原来的文件大小加上.VirtualSize和SizeOfRawData较大的那个
	Size = my_data.my_optional->SizeOfHeaders;
	for (int i = 0; i < my_data.my_file->NumberOfSections; i++)
	{
		Size += my_data.my_section[i]->SizeOfRawData;
	}
	Size += my_data.my_section[0]->SizeOfRawData;//这是最终新的文件的大小
	Data New_Data;
	New_Data.Before_Stretch_Data = (void*)malloc(Size * 1);
	memset(New_Data.Before_Stretch_Data, 0, Size);
	memcpy_s(New_Data.Before_Stretch_Data, Size, my_data.Before_Stretch_Data, Size - my_data.my_section[0]->SizeOfRawData);//将原来的文件复制过来
	Analyze_PE(New_Data, 1);//让New_Data的dos,file,optional,section有数据
	//复制新的节表
	void* Temp_ptr1 = (char*)my_data.Before_Stretch_Data + 0x98 + my_data.my_file->SizeOfOptionalHeader;
	void* Temp_ptr2 = (char*)New_Data.Before_Stretch_Data + 0x98 + my_data.my_file->SizeOfOptionalHeader + my_data.my_file->NumberOfSections * 0x28;
	memcpy_s(Temp_ptr2, 0x28, Temp_ptr1, 0x28);
	//复制新的节
	Temp_ptr1 = (char*)my_data.Before_Stretch_Data + my_data.my_optional->SizeOfHeaders;//指向.text段
	Temp_ptr2 = (char*)New_Data.Before_Stretch_Data + Size - my_data.my_section[0]->SizeOfRawData;
	memcpy_s(Temp_ptr2, my_data.my_section[0]->SizeOfRawData, Temp_ptr1, my_data.my_section[0]->SizeOfRawData);//复制完.text段作为新增节
	//接下来要改Header的各项数据
	New_Data.my_file->NumberOfSections++;
	New_Data.my_optional->SizeOfImage += my_data.my_section[0]->SizeOfRawData;
	Analyze_PE(New_Data, 1);
	New_Data.my_section[New_Data.my_file->NumberOfSections - 1]->PointerToRawData = New_Data.my_section[New_Data.my_file->NumberOfSections - 2]->PointerToRawData + New_Data.my_section[New_Data.my_file->NumberOfSections - 2]->SizeOfRawData;
	int size;
	if (New_Data.my_section[New_Data.my_file->NumberOfSections - 2]->Misc.VirtualSize >= New_Data.my_section[New_Data.my_file->NumberOfSections - 2]->SizeOfRawData)
	{
		size = New_Data.my_section[New_Data.my_file->NumberOfSections - 2]->Misc.VirtualSize;
	}
	else
	{
		size = New_Data.my_section[New_Data.my_file->NumberOfSections - 2]->SizeOfRawData;
	}
	size = size / my_data.my_optional->SectionAlignment + my_data.my_optional->SectionAlignment;
	New_Data.my_section[New_Data.my_file->NumberOfSections - 1]->VirtualAddress = New_Data.my_section[New_Data.my_file->NumberOfSections - 2]->VirtualAddress + size;
	FILE* my_file;
	if (fopen_s(&my_file, filename, "wb") == 0)
	{
		fwrite(New_Data.Before_Stretch_Data, 1, Size, my_file);
		cout << "写入成功！" << endl;
		return;
	}
	else
	{
		cout << "打开文件失败" << endl;
		return;
	}
	fclose(my_file);
}
void PE::Readfile(char* filename, Data& my_data)
{
	unsigned int size;
	FILE* datafile;
	void* data;
	//打开文件
	if (fopen_s(&datafile, filename, "rb") != 0)
	{
		cout << "打开文件失败" << endl;
		return;
	}
	else
	{
		//获取文件的大小
		cout << "打开文件成功！" << endl;
		fseek(datafile, 0, SEEK_END);
		size = ftell(datafile);
		fseek(datafile, 0, SEEK_SET);
		if (size == -1L)
		{
			cout << "文件大小判断失败！" << endl;
			return;
		}
		//申请内存空间把文件内容保存下来
		my_data.Before_Stretch_Data = (void*)malloc(size * sizeof(char));
		if (fread_s(my_data.Before_Stretch_Data, size, sizeof(char), size, datafile) == 0)
		{
			cout << "写入数据失败！" << endl;
			return;
		}
		cout << "写入数据成功，成功获取Data!" << endl;
		return;
	}
}
//分析PE结构
void PE::Analyze_PE(Data& data, int num)
{
	if (num == 1)
	{
		if (data.Before_Stretch_Data != nullptr)
		{
			DWORD* Temp_ptr = (DWORD*)data.Before_Stretch_Data;
			data.my_dos = (PIMAGE_DOS_HEADER)Temp_ptr;
			Temp_ptr = (DWORD*)((char*)data.Before_Stretch_Data + data.my_dos->e_lfanew);
			Temp_ptr++;
			data.my_file = (PIMAGE_FILE_HEADER)Temp_ptr;
			Temp_ptr = (DWORD*)((char*)Temp_ptr + 0x14);
			data.my_optional = (PIMAGE_OPTIONAL_HEADER)Temp_ptr;
			Temp_ptr = (DWORD*)((char*)data.my_optional + data.my_file->SizeOfOptionalHeader);
			data.my_section = (PIMAGE_SECTION_HEADER*)malloc(sizeof(PIMAGE_SECTION_HEADER) * data.my_file->NumberOfSections);
			memset(data.my_section, 0, sizeof(PIMAGE_SECTION_HEADER) * data.my_file->NumberOfSections);
			for (int i = 0; i < data.my_file->NumberOfSections; i++)
			{
				data.my_section[i] = (PIMAGE_SECTION_HEADER)Temp_ptr;
				Temp_ptr = (DWORD*)((char*)Temp_ptr + 0x28);
			}
			return;
		}
		cout << "分析PE结构失败！" << endl;
	}
	if (num == 2)
	{
		if (data.Stretch_Data != nullptr)
		{
			DWORD* Temp_ptr = (DWORD*)data.Stretch_Data;
			data.my_dos = (PIMAGE_DOS_HEADER)Temp_ptr;
			Temp_ptr = (DWORD*)((char*)data.Stretch_Data + data.my_dos->e_lfanew);
			Temp_ptr++;
			data.my_file = (PIMAGE_FILE_HEADER)Temp_ptr;
			Temp_ptr = (DWORD*)((char*)Temp_ptr + 0x14);
			data.my_optional = (PIMAGE_OPTIONAL_HEADER)Temp_ptr;
			Temp_ptr = (DWORD*)((char*)data.my_optional + data.my_file->SizeOfOptionalHeader);
			data.my_section = nullptr;
			data.my_section = (PIMAGE_SECTION_HEADER*)malloc(sizeof(PIMAGE_SECTION_HEADER) * data.my_file->NumberOfSections);
			for (int i = 0; i < data.my_file->NumberOfSections; i++)
			{
				data.my_section[i] = (PIMAGE_SECTION_HEADER)Temp_ptr;
				Temp_ptr = (DWORD*)((char*)Temp_ptr + 0x28);
			}
			return;
		}
		cout << "分析PE结构失败！" << endl;
	}
	if (num == 3)
	{
		if (data.Shrink_Data != nullptr)
		{
			DWORD* Temp_ptr = (DWORD*)data.Shrink_Data;
			data.my_dos = (PIMAGE_DOS_HEADER)Temp_ptr;
			Temp_ptr = (DWORD*)((char*)data.Shrink_Data + data.my_dos->e_lfanew);
			Temp_ptr++;
			data.my_file = (PIMAGE_FILE_HEADER)Temp_ptr;
			Temp_ptr = (DWORD*)((char*)Temp_ptr + 0x14);
			data.my_optional = (PIMAGE_OPTIONAL_HEADER)Temp_ptr;
			Temp_ptr = (DWORD*)((char*)data.my_optional + data.my_file->SizeOfOptionalHeader);
			data.my_section = (PIMAGE_SECTION_HEADER*)malloc(sizeof(PIMAGE_SECTION_HEADER) * data.my_file->NumberOfSections);
			for (int i = 0; i < data.my_file->NumberOfSections; i++)
			{
				data.my_section[i] = (PIMAGE_SECTION_HEADER)Temp_ptr;
				Temp_ptr = (DWORD*)((char*)Temp_ptr + 0x28);
			}
			return;
		}
		cout << "分析pe结构失败!" << endl;
	}
}
//拉伸PE结构   注意看PIMAGE_XXX_HEADER的定义，它们本就是指向结构体的指针
void PE::Stretch_PE(Data& my_data)
{
	unsigned Memory_Size = 0;
	Memory_Size = my_data.my_optional->SizeOfImage;
	my_data.Stretch_Data = (void*)malloc(sizeof(char) * Memory_Size);
	memset(my_data.Stretch_Data, 0, Memory_Size);
	void* temp_before_stretch_data_ptr = my_data.Before_Stretch_Data;
	int size_of_dos = 0x40;
	int size_of_junk = 0x40;
	int size_of_file = 0x18;
	unsigned Size_Of_Optional = my_data.my_file->SizeOfOptionalHeader;
	unsigned Size_Of_Section = 0x28;
	unsigned Size_Of_Header = my_data.my_optional->SizeOfHeaders;//还未对齐
	memcpy_s(my_data.Stretch_Data, Memory_Size, my_data.Before_Stretch_Data, Size_Of_Header);
	void* temp_stretch_data = my_data.Stretch_Data;
	//现在计算head头对齐后的大小
	int Size = Size_Of_Header % my_data.my_optional->SectionAlignment;
	Size_Of_Header = my_data.my_optional->SectionAlignment * Size;
	for (int i = 0; i < my_data.my_file->NumberOfSections; i++)
	{
		temp_stretch_data = (void*)((char*)my_data.Stretch_Data + my_data.my_section[i]->VirtualAddress);
		temp_before_stretch_data_ptr = (void*)((char*)my_data.Before_Stretch_Data + my_data.my_section[i]->PointerToRawData);
		memcpy_s(temp_stretch_data, my_data.my_section[i]->SizeOfRawData, temp_before_stretch_data_ptr, my_data.my_section[i]->SizeOfRawData);
	}
	cout << "拉伸成功" << endl;
}
void PE::Shrink_PE(Data& my_data)
{
	unsigned int Size = 0;
	Size = my_data.my_section[my_data.my_file->NumberOfSections - 1]->PointerToRawData + my_data.my_section[my_data.my_file->NumberOfSections - 1]->SizeOfRawData;
	my_data.Shrink_Data = (void*)malloc(Size);
	memset(my_data.Shrink_Data, 0, Size);
	//从Stretch_Data缩小
	//复制Heads
	memcpy_s(my_data.Shrink_Data, my_data.my_optional->SizeOfHeaders, my_data.Stretch_Data, my_data.my_optional->SizeOfHeaders);
	//复制节
	void* temp_shrink_data_ptr = my_data.Shrink_Data;
	void* temp_stretch_data_ptr = my_data.Stretch_Data;
	for (int i = 0; i < my_data.my_file->NumberOfSections; i++)
	{
		temp_shrink_data_ptr = (void*)((char*)my_data.Shrink_Data + my_data.my_section[i]->PointerToRawData);
		temp_stretch_data_ptr = (void*)((char*)my_data.Stretch_Data + my_data.my_section[i]->VirtualAddress);
		memcpy_s(temp_shrink_data_ptr, my_data.my_section[i]->SizeOfRawData, temp_stretch_data_ptr, my_data.my_section[i]->SizeOfRawData);
	}
	cout << "缩小成功" << endl;
	return;
}
int main()
{
	char filename[100] = "Dll1.dll";
	PE my_pe;
	Data my_data;
	my_pe.Readfile(filename, my_data);
	my_pe.Analyze_PE(my_data, 1);   //char*& Data, PIMAGE_DOS_HEADER& dos, PIMAGE_FILE_HEADER& file, PIMAGE_OPTIONAL_HEADER32& optional, PIMAGE_SECTION_HEADER*& section
	my_pe.Stretch_PE(my_data);
	my_pe.Shrink_PE(my_data);
	my_pe.Analyze_Data_Directory(my_data);
	my_pe.Print_IMAGE_DATA_DIRECTORY(my_data);
	my_pe.Print_ExportTable(my_data);
	cout << "转化的文件偏移是" << hex << my_pe.Rva_To_Foa(0x3100, my_data) << endl;
	//((void(*)())addr)();//调用
	HMODULE hDll = GetModuleHandleA("Dll1.dll");
	my_pe.GetFunctionAddrByName(my_data, (char*)"Print");
	my_pe.GetFunctionAddrByOrdinal(my_data, 14);
	return 0;
}

注意注意：有个踩过的坑我想分享给大家。

就是我本来想这样搞：

申请一个堆，里面存Dll的数据，通过分析可以找到Dll文件中函数的偏移嘛，然后我就想着，这个偏移，加上堆的基地址，赋值给一个函数指针，那不是直接就可以调用吗？

结果我试了半天，最后获得函数的真正地址也是正确的，结果就是运行不起来，tnnd，搞了好久，最后经过高人指点才知道，原来堆也是需要有运行权限的，貌似堆貌似没有运行权限。哎，搞死了，呜呜。