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PeTools.cpp
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420 lines (384 loc) · 13.7 KB
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#include "PeTools.h"
PeInstance::PeInstance(HANDLE PeAddr, int flag ,size_t fileSize)
{
//获取各种指针
PBYTE pTemp = (PBYTE)PeAddr;
DosHeader = (PIMAGE_DOS_HEADER)pTemp; //获取DOS头
pTemp = pTemp + ((PIMAGE_DOS_HEADER)pTemp)->e_lfanew; //偏移到NT头
NtHeader = (PIMAGE_NT_HEADERS)pTemp; //获取NT头
pTemp = pTemp + 0x4; //偏移到标准PE头
FileHeader = (PIMAGE_FILE_HEADER)pTemp; //获取标准PE头
pTemp = pTemp + 0x14; //偏移到可选PE头
OptionalHeader = (PIMAGE_OPTIONAL_HEADER)pTemp; //获取可选PE头
pTemp = pTemp + FileHeader->SizeOfOptionalHeader; //偏移到节表
pSectionHeader = (PIMAGE_SECTION_HEADER)pTemp; //获取节表
if (flag == 0)
{
InitWay = 0;
FileSize = OptionalHeader->SizeOfImage;
//填充内存缓冲区
ImageBuffer.AllocMem(OptionalHeader->SizeOfImage);
ImageBuffer.used = OptionalHeader->SizeOfImage;
memcpy(ImageBuffer, (PBYTE)PeAddr, OptionalHeader->SizeOfImage);
//获取各种指针
PBYTE pImageTemp = (PBYTE)ImageBuffer;
DosHeader_Image = (PIMAGE_DOS_HEADER)pImageTemp; //获取DOS头
pImageTemp = pImageTemp + ((PIMAGE_DOS_HEADER)pImageTemp)->e_lfanew; //偏移到NT头
NtHeader_Image = (PIMAGE_NT_HEADERS)pImageTemp; //获取NT头
pImageTemp = pImageTemp + 0x4; //偏移到标准PE头
FileHeader_Image = (PIMAGE_FILE_HEADER)pImageTemp; //获取标准PE头
pImageTemp = pImageTemp + 0x14; //偏移到可选PE头
OptionalHeader_Image = (PIMAGE_OPTIONAL_HEADER)pImageTemp; //获取可选PE头
pImageTemp = pImageTemp + FileHeader_Image->SizeOfOptionalHeader; //偏移到节表
pSectionHeader_Image = (PIMAGE_SECTION_HEADER)pImageTemp; //获取节表
}
else
{
InitWay = 1;
FileSize = fileSize;
//填充文件缓冲区
FileBuffer.AllocMem(fileSize);
FileBuffer.used = fileSize;
memcpy(FileBuffer, (PBYTE)PeAddr, fileSize);
//更新各种指针
PBYTE pFileTemp = (PBYTE)FileBuffer;
DosHeader = (PIMAGE_DOS_HEADER)pFileTemp; //获取DOS头
pFileTemp = pFileTemp + ((PIMAGE_DOS_HEADER)pFileTemp)->e_lfanew; //偏移到NT头
NtHeader = (PIMAGE_NT_HEADERS)pFileTemp; //获取NT头
pFileTemp = pFileTemp + 0x4; //偏移到标准PE头
FileHeader = (PIMAGE_FILE_HEADER)pFileTemp; //获取标准PE头
pFileTemp = pFileTemp + 0x14; //偏移到可选PE头
OptionalHeader = (PIMAGE_OPTIONAL_HEADER)pFileTemp; //获取可选PE头
pFileTemp = pFileTemp + FileHeader->SizeOfOptionalHeader; //偏移到节表
pSectionHeader = (PIMAGE_SECTION_HEADER)pFileTemp; //获取节表
}
}
PeInstance::PeInstance(PATH path, int flag)
{
//打开PE文件
Cfile PeFile(path);
FileSize = PeFile.size();
PBYTE pTemp = NULL;
switch (flag)
{
case 1:
{
InitWay = 1;
//写入FileBuffer
FileBuffer.AllocMem(FileSize);
FileBuffer.used = FileSize;
PeFile >> FileBuffer;
//获取各种指针
pTemp = FileBuffer;
DosHeader = (PIMAGE_DOS_HEADER)pTemp; //获取DOS头
pTemp = pTemp + ((PIMAGE_DOS_HEADER)pTemp)->e_lfanew; //偏移到NT头
NtHeader = (PIMAGE_NT_HEADERS)pTemp; //获取NT头
pTemp = pTemp + 0x4; //偏移到标准PE头
FileHeader = (PIMAGE_FILE_HEADER)pTemp; //获取标准PE头
pTemp = pTemp + 0x14; //偏移到可选PE头
OptionalHeader = (PIMAGE_OPTIONAL_HEADER)pTemp; //获取可选PE头
pTemp = pTemp + FileHeader->SizeOfOptionalHeader; //偏移到节表
pSectionHeader = (PIMAGE_SECTION_HEADER)pTemp; //获取节表
break;
}
case 0:
{
InitWay = 0;
//写入ImageBuffer
ImageBuffer.AllocMem(FileSize);
ImageBuffer.used = FileSize;
PeFile >> ImageBuffer;
//获取各种指针
pTemp = ImageBuffer;
DosHeader_Image = (PIMAGE_DOS_HEADER)pTemp; //获取DOS头
pTemp = pTemp + ((PIMAGE_DOS_HEADER)pTemp)->e_lfanew; //偏移到NT头
NtHeader_Image = (PIMAGE_NT_HEADERS)pTemp; //获取NT头
pTemp = pTemp + 0x4; //偏移到标准PE头
FileHeader_Image = (PIMAGE_FILE_HEADER)pTemp; //获取标准PE头
pTemp = pTemp + 0x14; //偏移到可选PE头
OptionalHeader_Image = (PIMAGE_OPTIONAL_HEADER)pTemp; //获取可选PE头
pTemp = pTemp + FileHeader_Image->SizeOfOptionalHeader; //偏移到节表
pSectionHeader_Image = (PIMAGE_SECTION_HEADER)pTemp; //获取节表
break;
}
}
}
BOOL PeInstance::ToImageBuffer()
{
ImageBuffer.AllocMem(OptionalHeader->SizeOfImage);
ImageBuffer.used = OptionalHeader->SizeOfImage;
//PBYTE pImageBuffer = ImageBuffer;
//拷贝所有头+节表
ImageBuffer.copy_from(FileBuffer, OptionalHeader->SizeOfHeaders, 0);
//拷贝所有节
for (int j = 0; j < FileHeader->NumberOfSections; j++)
{
for (DWORD k = 0; k < pSectionHeader[j].SizeOfRawData; k++)
{
((PBYTE)ImageBuffer + pSectionHeader[j].VirtualAddress)[k] = ((PBYTE)FileBuffer + pSectionHeader[j].PointerToRawData)[k];
}
}
PBYTE pTemp = ImageBuffer;
DosHeader_Image = (PIMAGE_DOS_HEADER)pTemp; //获取DOS头
pTemp = pTemp + ((PIMAGE_DOS_HEADER)pTemp)->e_lfanew; //偏移到NT头
NtHeader_Image = (PIMAGE_NT_HEADERS)pTemp; //获取NT头
pTemp = pTemp + 0x4; //偏移到标准PE头
FileHeader_Image = (PIMAGE_FILE_HEADER)pTemp; //获取标准PE头
pTemp = pTemp + 0x14; //偏移到可选PE头
OptionalHeader_Image = (PIMAGE_OPTIONAL_HEADER)pTemp; //获取可选PE头
pTemp = pTemp + FileHeader_Image->SizeOfOptionalHeader; //偏移到节表
pSectionHeader_Image = (PIMAGE_SECTION_HEADER)pTemp; //获取节表
//返回成功标志
return TRUE;
}
BOOL PeInstance::AddSeaction(size_t SectionSize)
{
//新增节名字
BYTE NewSectionName[] = "Fly";
//申请一块新的FileBuffer
NewBuffer.AllocMem(FileSize + Align(SectionSize, OptionalHeader->FileAlignment));
//把原来的内容拷贝过来
NewBuffer.used = FileSize + Align(SectionSize, OptionalHeader->FileAlignment);
NewBuffer.copy_from(FileBuffer, FileSize);
PBYTE pTemp = NewBuffer;
//更新所有指针
PBYTE pNewBuffer = NewBuffer;
DosHeader = (PIMAGE_DOS_HEADER)pNewBuffer; //获取DOS头
pNewBuffer = pNewBuffer + DosHeader->e_lfanew; //偏移到NT头
NtHeader = (PIMAGE_NT_HEADERS)pNewBuffer; //获取NT头
pNewBuffer = pNewBuffer + 0x4; //偏移到标准PE头
FileHeader = (PIMAGE_FILE_HEADER)pNewBuffer; //获取标准PE头
pNewBuffer = pNewBuffer + 0x14; //偏移到可选PE头
OptionalHeader = (PIMAGE_OPTIONAL_HEADER)pNewBuffer; //获取可选PE头
pNewBuffer = pNewBuffer + FileHeader->SizeOfOptionalHeader; //偏移到节表
pSectionHeader = (PIMAGE_SECTION_HEADER)pNewBuffer; //获取节表
//判断节表空间是否充足
if (OptionalHeader->SizeOfHeaders - (DWORD)(&(pSectionHeader[FileHeader->NumberOfSections]) - (DWORD)(NewBuffer)) < 0x50)
{
printf("节表空间不足！\n");
PromoteHeaders(); //提升所有头+节表
}
//偏移到要添加节表的位置
pNewBuffer = (PBYTE)(pTemp + (DWORD)(&pSectionHeader[FileHeader->NumberOfSections]) - (DWORD)(pTemp));
//后面填充一个全0结构
memset(pNewBuffer + 0x28, 0x0, 0x28);
//设置节表内容
for (int i = 0; i < strlen((char*)NewSectionName); i++) //设置节表名字
((PBYTE)((PIMAGE_SECTION_HEADER)pNewBuffer)->Name)[i] = NewSectionName[i];
((PBYTE)((PIMAGE_SECTION_HEADER)pNewBuffer)->Name)[strlen((char*)NewSectionName)] = 0x0;
((PIMAGE_SECTION_HEADER)pNewBuffer)->Misc.VirtualSize = Align(SectionSize, OptionalHeader->SectionAlignment); //设置内存中大小
DWORD MaxSize = pSectionHeader[FileHeader->NumberOfSections - 1].SizeOfRawData > pSectionHeader[FileHeader->NumberOfSections - 1].Misc.VirtualSize ?
pSectionHeader[FileHeader->NumberOfSections - 1].SizeOfRawData : pSectionHeader[FileHeader->NumberOfSections - 1].Misc.VirtualSize;
DWORD SizeOfData = Align(MaxSize, OptionalHeader->SectionAlignment);
((PIMAGE_SECTION_HEADER)pNewBuffer)->VirtualAddress = pSectionHeader[FileHeader->NumberOfSections - 1].VirtualAddress + SizeOfData; //设置内存中偏移
((PIMAGE_SECTION_HEADER)pNewBuffer)->SizeOfRawData = Align(SectionSize, OptionalHeader->FileAlignment); //设置文件中大小
((PIMAGE_SECTION_HEADER)pNewBuffer)->PointerToRawData = pSectionHeader[FileHeader->NumberOfSections - 1].PointerToRawData + pSectionHeader[FileHeader->NumberOfSections - 1].SizeOfRawData; //设置文件中偏移
for (int i = 0; i < FileHeader->NumberOfSections - 1; i++)
{
((PIMAGE_SECTION_HEADER)pNewBuffer)->Characteristics = ((PIMAGE_SECTION_HEADER)pNewBuffer)->Characteristics | pSectionHeader[i].Characteristics; //设置属性
}
//修改节表的数量
FileHeader->NumberOfSections++;
//设置节的内容
memset((PBYTE)pTemp + pSectionHeader[FileHeader->NumberOfSections - 1].PointerToRawData, 0x7, Align(SectionSize, OptionalHeader->FileAlignment));
//修改SizeOfImage
OptionalHeader->SizeOfImage = OptionalHeader->SizeOfImage + Align(SectionSize, OptionalHeader->SectionAlignment);
return TRUE;
}
BOOL PeInstance::AddDataToNewSection(Cbuffer& SrcBuffer,size_t SrcSize)
{
NewBuffer.copy_from(SrcBuffer, SrcSize, pSectionHeader[FileHeader->NumberOfSections - 1].PointerToRawData);
return TRUE;
}
BOOL PeInstance::GetDataFromLastSection(Cbuffer& DesBuffer, size_t DesSize)
{
switch (InitWay)
{
case 0:
{
memcpy(DesBuffer,
(PBYTE)((DWORD)ImageBuffer + pSectionHeader[FileHeader_Image->NumberOfSections - 1].VirtualAddress),
DesSize);
break;
}
case 1:
{
memcpy(DesBuffer,
(PBYTE)((DWORD)FileBuffer + pSectionHeader[FileHeader->NumberOfSections - 1].PointerToRawData),
DesSize);
break;
}
}
return TRUE;
}
DWORD PeInstance::GetLastSectionSize()
{
switch (InitWay)
{
case 0:
return pSectionHeader[FileHeader->NumberOfSections - 1].Misc.VirtualSize;
case 1:
return pSectionHeader[FileHeader->NumberOfSections - 1].SizeOfRawData;
}
}
BOOL PeInstance::HaveRelocation()
{
PIMAGE_DATA_DIRECTORY DataDirectory = OptionalHeader->DataDirectory;
return (DataDirectory[5].VirtualAddress)
&& (DataDirectory[5].Size);
}
BOOL PeInstance::FixRelocation(DWORD newImageBase)
{
PBYTE Point = NULL; //可以随意偏移的指针
PDWORD Offset = NULL; //要修正的地址
DWORD BeforeBase = OptionalHeader->ImageBase; //保存修改前的ImageBase
//修改ImageBase
OptionalHeader->ImageBase = newImageBase;
//获取重定位表指针
PIMAGE_BASE_RELOCATION pBaseRelocation = (PIMAGE_BASE_RELOCATION)(RvaToFoa(OptionalHeader->DataDirectory[5].VirtualAddress) + (DWORD)FileBuffer);
Point = (PBYTE)pBaseRelocation;
//遍历重定位表
for (int i = 0; ((PIMAGE_BASE_RELOCATION)Point)->SizeOfBlock != 0 && ((PIMAGE_BASE_RELOCATION)Point)->VirtualAddress != 0; i++)
{
for (int j = 0; j < (((PIMAGE_BASE_RELOCATION)Point)->SizeOfBlock - 8) / 2; j++)
{
if ((((PWORD)(Point + 0x8))[j] >> 0xC) == 0x3)
{
Offset = (PDWORD)((DWORD)FileBuffer + RvaToFoa((((PWORD)(Point + 0x8))[j] & 0xFFF) + ((PIMAGE_BASE_RELOCATION)Point)->VirtualAddress));
*Offset = *Offset - BeforeBase + OptionalHeader->ImageBase;
}
}
Point = Point + ((PIMAGE_BASE_RELOCATION)Point)->SizeOfBlock;
}
return TRUE;
}
BOOL PeInstance::Save(PATH path, int Flag)
{
Cfile NewFile(path);
switch (Flag)
{
case 0:
{
//保存FileBuffer
NewFile << FileBuffer;
printf("FileBuffer保存成功！\n");
break;
}
case 1:
{
//保存ImageBuffer
NewFile << ImageBuffer;
printf("ImageBuffer保存成功！\n");
break;
}
case 2:
{
//保存NewBuffer
NewFile << NewBuffer;
printf("NewBuffer保存成功！\n");
break;
}
}
return TRUE;
}
size_t PeInstance::GetSize()
{
return FileSize;
}
Cbuffer& PeInstance::GetBufferInstance(int Flag)
{
switch (Flag)
{
case 0:
{
return FileBuffer;
break;
}
case 1:
{
return ImageBuffer;
break;
}
case 2:
{
return NewBuffer;
break;
}
}
}
int PeInstance::Align(int Value, int align)
{
{
if (Value % align == 0)
{
return Value;
}
return ((Value / align) + 1) * align;
}
}
DWORD PeInstance::RvaToFoa(DWORD dwRva)
{
DWORD dwFoa = 0;
//判断是否在头+节表中
if (dwRva <= OptionalHeader->SizeOfHeaders)
{
dwFoa = dwRva;
return dwFoa;
}
//判断在是否在节中
int i;
for (i = 0; i < FileHeader->NumberOfSections; i++)
{
if (dwRva >= pSectionHeader[i].VirtualAddress && dwRva <= (pSectionHeader[i].VirtualAddress + pSectionHeader[i].SizeOfRawData))
{
dwFoa = dwRva - pSectionHeader[i].VirtualAddress;
return dwFoa + pSectionHeader[i].PointerToRawData;
}
}
}
DWORD PeInstance::FoaToRva(DWORD dwFoa)
{
DWORD dwRva = 0;
//判断是否在头+节表中
if (dwFoa <= OptionalHeader->SizeOfHeaders)
{
dwRva = dwFoa;
return dwRva;
}
//判断是否在节中
int i = 0;
for (i = 0; i < FileHeader->NumberOfSections; i++)
{
if (dwFoa >= pSectionHeader[i].PointerToRawData && dwFoa <= (pSectionHeader[i].PointerToRawData + pSectionHeader[i].SizeOfRawData))
{
dwRva = dwFoa - pSectionHeader[i].PointerToRawData;
return dwRva + pSectionHeader[i].VirtualAddress;
}
}
}
BOOL PeInstance::PromoteHeaders()
{
PBYTE pTemp = NewBuffer;
PBYTE pFileBuffer = NewBuffer;
DWORD SizeOfCopy = (DWORD)(&pSectionHeader[FileHeader->NumberOfSections]) - (DWORD)(pFileBuffer + DosHeader->e_lfanew);
DWORD FillSize = (DWORD)(&pSectionHeader[FileHeader->NumberOfSections]) - (DWORD)pFileBuffer - 0x40 - SizeOfCopy;
//拷贝所有头+节表
for (DWORD i = 0; i < SizeOfCopy; i++)
{
(pFileBuffer + 0x40)[i] = (pFileBuffer + DosHeader->e_lfanew)[i];
}
//填充
memset((pFileBuffer + 0x40 + SizeOfCopy), 0x0, FillSize);
//修正e_lfanew
DosHeader->e_lfanew = 0x40;
//重新修正所有头+节表指针
pTemp = pTemp + DosHeader->e_lfanew; //偏移到NT头
NtHeader = (PIMAGE_NT_HEADERS)pTemp; //获取NT头
pTemp = pTemp + 0x4; //偏移到标准PE头
FileHeader = (PIMAGE_FILE_HEADER)pTemp; //获取标准PE头
pTemp = pTemp + 0x14; //偏移到可选PE头
OptionalHeader = (PIMAGE_OPTIONAL_HEADER)pTemp; //获取可选PE头
pTemp = pTemp + FileHeader->SizeOfOptionalHeader; //偏移到节表
pSectionHeader = (PIMAGE_SECTION_HEADER)pTemp; //获取节表
return TRUE;
}