合并DLL到EXE文件中源码_c++合并exe和dll-优快云博客

本文链接：https://blog.youkuaiyun.com/andyhebear/article/details/4352469

本文介绍了一种通过内存直接加载DLL并调用其导出函数的方法。该方法绕过了传统的加载过程，实现对DLL的直接加载及函数调用，适用于特定的应用场景。文章详细解释了如何从资源中读取DLL文件、解析PE文件格式、重定位导入表和基址依赖项等关键技术步骤。

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// MergeDll.cpp : Defines the entry point for the application. //http://blog.youkuaiyun.com/andyhebear/ // #define WIN32_LEAN_AND_MEAN #pragma comment ( linker,"/ALIGN:4096" ) #include <windows.h> #include "resource.h" #include <lmerr.h> #include <stdio.h> BOOL IsNT(); LPVOID lpImageDll2; DWORD LoadPbDllFromMemory(LPVOID lpRawDll, LPVOID lpImageDll); DWORD GetProcAddressDirectly(PIMAGE_DOS_HEADER dosHeader, char * FuncName); DWORD UnloadPbDllFromMemory(PIMAGE_DOS_HEADER dosHeader); void SetupResource(PIMAGE_DOS_HEADER dosHeader); void DumpResourceSection(PBYTE pImageBase, PIMAGE_NT_HEADERS pNTHeader); void DisplayErrorText( DWORD dwLastError ); ////////////////////////////////////////////////////////////////////////// #define MakePtr( cast, ptr, addValue ) (cast)( (DWORD)(ptr)+(DWORD)(addValue)) #define GetImgDirEntryRVA( pNTHdr, IDE ) / (pNTHdr->OptionalHeader.DataDirectory[IDE].VirtualAddress) #define GetImgDirEntrySize( pNTHdr, IDE ) / (pNTHdr->OptionalHeader.DataDirectory[IDE].Size) PIMAGE_SECTION_HEADER GetEnclosingSectionHeader(DWORD rva, PIMAGE_NT_HEADERS pNTHeader); LPVOID GetPtrFromRVA( DWORD rva, PIMAGE_NT_HEADERS pNTHeader, PBYTE imageBase ); PBYTE pImageBase; ////////////////////////////////////////////////////////////////////////// typedef char * (CALLBACK* LPFNDLLFUNC1)(); LPFNDLLFUNC1 lpfnDllFunc1; typedef UINT (CALLBACK * LPENTRYPOINT) (HANDLE hInstance, DWORD Reason, LPVOID Reserved); LPENTRYPOINT EntryPoint; // Function pointer char * uReturnVal; int APIENTRY WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow) { // TODO: Place code here. LPVOID sRawDll; HRSRC hRes; HMODULE hLibrary; HGLOBAL hResourceLoaded; char lib_name[MAX_PATH]; GetModuleFileName(hInstance, lib_name, MAX_PATH ); hLibrary = LoadLibrary(lib_name); if (NULL != hLibrary) { hRes = FindResource(hLibrary, MAKEINTRESOURCE(IDR_DATA1), RT_RCDATA); if (NULL != hRes) { hResourceLoaded = LoadResource(hLibrary, hRes); if (NULL != hResourceLoaded) { SizeofResource(hLibrary, hRes); sRawDll = (LPVOID)LockResource(hResourceLoaded); } } else return 1; FreeLibrary(hLibrary); } else return 1; try // 在错误处理中进行操作,一但发生错误,必须释放我们分配的内存 // 以避免造成内存泄漏 { lpImageDll2=NULL; LPVOID lpImageDll=NULL; // 从资源中载入 DLL 到内存 if (LoadPbDllFromMemory(sRawDll, lpImageDll)) { MessageBox(NULL,"Load Dll Failed!","",0); return 1; } // 取得要调用的函数的地址 lpfnDllFunc1 = (LPFNDLLFUNC1)GetProcAddressDirectly((PIMAGE_DOS_HEADER)lpImageDll2, "getbios"); if(lpfnDllFunc1==0) { MessageBox(NULL,"Could not get Function address!","",0); return 1; } // 调用 DLL 中的函数 getbios 来获取主板 ID uReturnVal = lpfnDllFunc1(); if(strlen(uReturnVal)!=0) { MessageBox(NULL,uReturnVal,"your mainboard id!",0); } else MessageBox(NULL,"getbios 返回值为 NULL",":(",0); UnloadPbDllFromMemory((PIMAGE_DOS_HEADER)lpImageDll2); } catch(...) { MessageBox(NULL,"Error occus!",":(",0); if(lpImageDll2!=NULL) VirtualFree(lpImageDll2,0, MEM_RELEASE); } return 0; } PIMAGE_SECTION_HEADER GetEnclosingSectionHeader(DWORD rva, PIMAGE_NT_HEADERS pNTHeader) { PIMAGE_SECTION_HEADER section = IMAGE_FIRST_SECTION(pNTHeader); unsigned i; for ( i=0; i < pNTHeader->FileHeader.NumberOfSections; i++, section++ ) { DWORD size = section->Misc.VirtualSize; if ( 0 == size ) size = section->SizeOfRawData; if ( (rva >= section->VirtualAddress) && (rva < (section->VirtualAddress + size))) return section; } return 0; } LPVOID GetPtrFromRVA( DWORD rva, PIMAGE_NT_HEADERS pNTHeader, PBYTE imageBase ) { PIMAGE_SECTION_HEADER pSectionHdr; INT delta; pSectionHdr = GetEnclosingSectionHeader( rva, pNTHeader ); if ( !pSectionHdr ) return 0; delta = (INT)(pSectionHdr->VirtualAddress-pSectionHdr->PointerToRawData); return (PVOID) ( imageBase + rva - delta ); } void DisplayErrorText( DWORD dwLastError ) // 标准的错误处理函数 { HMODULE hModule = NULL; // default to system source LPSTR MessageBuffer; DWORD dwBufferLength; DWORD dwFormatFlags = FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_IGNORE_INSERTS | FORMAT_MESSAGE_FROM_SYSTEM ; if(dwLastError >= NERR_BASE && dwLastError <= MAX_NERR) { hModule = LoadLibraryEx( TEXT("hardware.dll"), NULL, LOAD_LIBRARY_AS_DATAFILE ); if(hModule != NULL) dwFormatFlags |= FORMAT_MESSAGE_FROM_HMODULE; } if(dwBufferLength = FormatMessageA( dwFormatFlags, hModule, // module to get message from (NULL == system) dwLastError, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), // default language (LPSTR) &MessageBuffer, 0, NULL )) { MessageBox(NULL,MessageBuffer,0,0); LocalFree(MessageBuffer); } if(hModule != NULL) FreeLibrary(hModule); } DWORD GetProcAddressDirectly(PIMAGE_DOS_HEADER dosHeader, char * FuncName) { PIMAGE_NT_HEADERS pNTHeader; PIMAGE_EXPORT_DIRECTORY pExportDir; PWORD lpNameOrdinals; LPDWORD lpFunctions; DWORD * lpName; char * lpExpFuncName; DWORD i; DWORD j; char * lpFuncName; if(dosHeader->e_magic != IMAGE_DOS_SIGNATURE) return 0; pNTHeader = (PIMAGE_NT_HEADERS)((DWORD)dosHeader + dosHeader->e_lfanew); if (pNTHeader->Signature != IMAGE_NT_SIGNATURE) return 0; if ((pNTHeader->FileHeader.SizeOfOptionalHeader != sizeof(pNTHeader->OptionalHeader)) || (pNTHeader->OptionalHeader.Magic != IMAGE_NT_OPTIONAL_HDR32_MAGIC)) return 0; DWORD exportsStartRVA, exportsEndRVA; pImageBase = (PBYTE)dosHeader; // Make pointers to 32 and 64 bit versions of the header. pNTHeader = MakePtr( PIMAGE_NT_HEADERS, dosHeader,dosHeader->e_lfanew ); exportsStartRVA = GetImgDirEntryRVA(pNTHeader,IMAGE_DIRECTORY_ENTRY_EXPORT); exportsEndRVA = exportsStartRVA + GetImgDirEntrySize(pNTHeader, IMAGE_DIRECTORY_ENTRY_EXPORT); // Get the IMAGE_SECTION_HEADER that contains the exports. This is // usually the .edata section, but doesn't have to be. PIMAGE_SECTION_HEADER header; header = GetEnclosingSectionHeader( exportsStartRVA, pNTHeader ); if ( !header ) return 0; INT delta; delta = (INT)(header->VirtualAddress - header->PointerToRawData); pExportDir = (PIMAGE_EXPORT_DIRECTORY)GetPtrFromRVA(exportsStartRVA, pNTHeader, pImageBase); pExportDir =(PIMAGE_EXPORT_DIRECTORY) (pNTHeader->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_EXPORT].VirtualAddress); if (pExportDir == 0) { MessageBox(NULL,"Error in GetProcAddressDirectly()",0,0); return 0; } pExportDir =(PIMAGE_EXPORT_DIRECTORY) ((DWORD)pExportDir + (DWORD)dosHeader); lpNameOrdinals =(PWORD)((DWORD)pExportDir->AddressOfNameOrdinals + (DWORD)dosHeader); lpName =(LPDWORD) (pExportDir->AddressOfNames + (DWORD)dosHeader); lpFunctions =(LPDWORD) (pExportDir->AddressOfFunctions + (DWORD)dosHeader); lpFuncName = FuncName; if(HIWORD(lpFuncName)!=0 ) { for( i = 0;i<=pExportDir->NumberOfFunctions - 1;i++) { DWORD entryPointRVA = *lpFunctions; if ( entryPointRVA == 0 ) continue; // Skip over gaps in exported function for( j = 0;j<=pExportDir->NumberOfNames-1;j++) { if( lpNameOrdinals[j] == i) { lpExpFuncName = (char *) (lpName[j] + (DWORD)dosHeader); if(strcmp((char *)lpExpFuncName,(char *)FuncName)==0) return (DWORD) (lpFunctions[i] + (DWORD)dosHeader); } } } } else { for (i = 0 ;i<=pExportDir->NumberOfFunctions - 1;i++) { if (lpFuncName == (char *)(pExportDir->Base + i)) { if (lpFunctions[i]) return (unsigned long) (lpFunctions[i] + dosHeader); } } } return 0; } DWORD LoadPbDllFromMemory(LPVOID lpRawDll, LPVOID lpImageDll) { SYSTEM_INFO sSysInfo; PIMAGE_DOS_HEADER dosHeader; PIMAGE_NT_HEADERS pNTHeader; PIMAGE_SECTION_HEADER section; PIMAGE_IMPORT_DESCRIPTOR pImportDesc; PIMAGE_IMPORT_BY_NAME pOrdinalName; PIMAGE_BASE_RELOCATION baseReloc; PDWORD lpLink; unsigned char Protection[4096]; HINSTANCE hDll; WORD i; DWORD ImagePages,fOldProtect,j,MaxLen,HdrLen,Addr1,Addr2,Pg,Pg1,Pg2; char * sDllName; if(NULL == lpRawDll) return 1 ; dosHeader = (PIMAGE_DOS_HEADER)lpRawDll; // Is this the MZ header? if ((TRUE == IsBadReadPtr(dosHeader,sizeof (IMAGE_DOS_HEADER))) || (IMAGE_DOS_SIGNATURE != dosHeader->e_magic)) return 2; // Get the PE header. pNTHeader = MakePtr(PIMAGE_NT_HEADERS,dosHeader,dosHeader->e_lfanew); // Is this a real PE image? if((TRUE == IsBadReadPtr(pNTHeader,sizeof ( IMAGE_NT_HEADERS))) || ( IMAGE_NT_SIGNATURE != pNTHeader->Signature)) return 3 ; if(( pNTHeader->FileHeader.SizeOfOptionalHeader != sizeof(pNTHeader->OptionalHeader)) || (pNTHeader->OptionalHeader.Magic != IMAGE_NT_OPTIONAL_HDR32_MAGIC)) return 4; if (pNTHeader->FileHeader.NumberOfSections < 1) return 5; section = IMAGE_FIRST_SECTION( pNTHeader ); int HeaderSize = sizeof(IMAGE_SECTION_HEADER); // 节头长度 HdrLen = (DWORD)section - (DWORD)dosHeader + HeaderSize * pNTHeader->FileHeader.NumberOfSections; // 找出最大的节的长度,此节一般是代码所在的节(.text 节) MaxLen = HdrLen; int ii=0; for (i = 0;i<(DWORD)pNTHeader->FileHeader.NumberOfSections;i++)// find MaxLen { if(MaxLen < section[i].VirtualAddress + section[i].SizeOfRawData) { MaxLen = section[i].VirtualAddress + section[i].SizeOfRawData; } if(strcmp((const char *)section[i].Name,".rsrc") == 0) ii=i; } GetSystemInfo(&sSysInfo); ImagePages = MaxLen / sSysInfo.dwPageSize; if (MaxLen % sSysInfo.dwPageSize) ImagePages++; // 分配所需的内存 DWORD NeededMemory = ImagePages * sSysInfo.dwPageSize; lpImageDll = VirtualAlloc(NULL, NeededMemory, MEM_COMMIT, PAGE_EXECUTE_READWRITE); if (lpImageDll == NULL) return 6; // 分配内存失败 MoveMemory( lpImageDll, lpRawDll, HdrLen ); // 复制节头 DWORD OrgAddr = 0; DWORD NewAddr = 0; DWORD Size = 0; // 复制 .text 节数据 for (i = 0;i<pNTHeader->FileHeader.NumberOfSections;i++) { OrgAddr = (DWORD)lpImageDll + (DWORD)section[i].VirtualAddress; NewAddr = (DWORD)lpRawDll + (DWORD)section[i].PointerToRawData; Size = (DWORD)section[i].SizeOfRawData; MoveMemory((void *)OrgAddr, (void *)NewAddr, Size ); } dosHeader = (PIMAGE_DOS_HEADER) lpImageDll; // Switch to new image pNTHeader = (PIMAGE_NT_HEADERS) ((DWORD)dosHeader + dosHeader->e_lfanew); section = (PIMAGE_SECTION_HEADER) ((DWORD)pNTHeader + sizeof(IMAGE_NT_HEADERS)); pImageBase = (PBYTE)dosHeader; if((ii!=0) && (IsNT()==TRUE)) { section[ii].VirtualAddress = section[ii].VirtualAddress + (DWORD)lpRawDll; section[ii].PointerToRawData = section[ii].PointerToRawData + (DWORD)lpRawDll; } DWORD importsStartRVA; // Look up where the imports section is (normally in the .idata section) // but not necessarily so. Therefore, grab the RVA from the data dir. importsStartRVA = GetImgDirEntryRVA(pNTHeader,IMAGE_DIRECTORY_ENTRY_IMPORT); if ( !importsStartRVA ) { VirtualFree(dosHeader,0, MEM_RELEASE); return 7; } pImportDesc = (PIMAGE_IMPORT_DESCRIPTOR) pNTHeader->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_IMPORT].VirtualAddress; if(pImportDesc!= 0) pImportDesc = (PIMAGE_IMPORT_DESCRIPTOR) ((DWORD)pImportDesc + (DWORD)dosHeader); else { VirtualFree(dosHeader,0, MEM_RELEASE); return 8; } while (1) // 处理各入口表中的 DLL { // 检查是否遇到了空的 IMAGE_IMPORT_DESCRIPTOR if ((pImportDesc->TimeDateStamp==0 ) && (pImportDesc->Name==0)) break; // 从磁盘载入必须的 Dll, 注意,载入的 DLL 是合并的 DLL 的入口表中的 DLL, 不是合并到 EXE 中的 DLL sDllName = (char *) (pImportDesc->Name + (DWORD)pImageBase); hDll = GetModuleHandle(sDllName); if (hDll == 0 ) hDll = LoadLibrary(sDllName); if (hDll == 0 ) { MessageBox(NULL, "Can't find required Dll","Error in LoadPbDllFromMemory()",0); VirtualFree(dosHeader,0, MEM_RELEASE); return 9; } DWORD *lpFuncNameRef = (DWORD *) (pImportDesc->OriginalFirstThunk + (DWORD)dosHeader); DWORD *lpFuncAddr = (DWORD *) (pImportDesc->FirstThunk + (DWORD)dosHeader); while( *lpFuncNameRef != 0) { pOrdinalName = (PIMAGE_IMPORT_BY_NAME) (*lpFuncNameRef + (DWORD)dosHeader); DWORD pIMAGE_ORDINAL_FLAG = 0x80000000; if (*lpFuncNameRef & pIMAGE_ORDINAL_FLAG) *lpFuncAddr = (DWORD) GetProcAddress(hDll, (const char *)(*lpFuncNameRef & 0xFFFF)); else *lpFuncAddr = (DWORD) GetProcAddress(hDll, (const char *)pOrdinalName->Name); if (lpFuncAddr == 0) { VirtualFree(dosHeader,0, MEM_RELEASE); return 10;// Can't GetProcAddress } //================================ lpFuncAddr++; lpFuncNameRef++; } pImportDesc++; } DWORD TpOffset; baseReloc = (PIMAGE_BASE_RELOCATION) ((DWORD) pNTHeader->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_BASERELOC].VirtualAddress); //int num=0; if (baseReloc !=0) { baseReloc = (PIMAGE_BASE_RELOCATION) ((DWORD)baseReloc + (DWORD)dosHeader); while(baseReloc->VirtualAddress != 0) { PWORD lpTypeOffset = (PWORD) ((DWORD)baseReloc + sizeof(IMAGE_BASE_RELOCATION)); while (lpTypeOffset < (PWORD)((DWORD)baseReloc + (DWORD)baseReloc->SizeOfBlock)) { TpOffset = *lpTypeOffset & 0xF000; if(TpOffset == 0x3000) { lpLink = (PDWORD) ((DWORD)dosHeader + baseReloc->VirtualAddress + (*lpTypeOffset & 0xFFF)); *lpLink = (DWORD)dosHeader+ (*lpLink) -pNTHeader->OptionalHeader.ImageBase; } else { if (TpOffset != 0) { VirtualFree(dosHeader,0, MEM_RELEASE); return 10; } } lpTypeOffset++; } baseReloc = (PIMAGE_BASE_RELOCATION) ((DWORD)baseReloc + (DWORD)baseReloc->SizeOfBlock); } } // 取得原始的内存状态 memset(Protection,0,4096); for (i = 0;i<=pNTHeader->FileHeader.NumberOfSections;i++) { if (i == pNTHeader->FileHeader.NumberOfSections) { Addr1 = 0; Addr2 = HdrLen; j = 0x60000000; } else { Addr1 = section[i].VirtualAddress; Addr2 = section[i].SizeOfRawData; j = section[i].Characteristics; } Addr2 += Addr1 - 1; Pg1 = Addr1 / sSysInfo.dwPageSize; Pg2 = Addr2 / sSysInfo.dwPageSize; for(Pg = Pg1 ;Pg<=Pg2;Pg++) { if (j & 0x20000000) Protection[Pg] |= 1; // Execute if (j & 0x40000000) Protection[Pg] |= 2; // Read if (j & 0x80000000) Protection[Pg] |= 4; // Write } } // 恢复原始的内存状态 Addr1 = (DWORD)dosHeader; for (Pg = 0 ;Pg<= ImagePages;Pg++) { switch(Protection[Pg]) { case 2: fOldProtect = PAGE_READONLY; break; case 3: fOldProtect = PAGE_EXECUTE_READ; break; case 6: fOldProtect = PAGE_READWRITE; break; default: fOldProtect = PAGE_EXECUTE_READWRITE; // Ignore strange combinations break; } //================================ if (fOldProtect !=PAGE_EXECUTE_READWRITE) { if (VirtualProtect((void *)Addr1, sSysInfo.dwPageSize, fOldProtect, &fOldProtect) == 0) { VirtualFree(dosHeader,0, MEM_RELEASE); return 11; } } Addr1 += sSysInfo.dwPageSize; } EntryPoint = (LPENTRYPOINT) ((DWORD)pNTHeader->OptionalHeader.AddressOfEntryPoint + (DWORD)dosHeader); LPVOID lpReserved = 0; EntryPoint((HINSTANCE)dosHeader, DLL_PROCESS_ATTACH, lpReserved); lpImageDll2=lpImageDll; return 0; } DWORD UnloadPbDllFromMemory(PIMAGE_DOS_HEADER dosHeader) { PIMAGE_NT_HEADERS pNTHeader; pNTHeader = (PIMAGE_NT_HEADERS)((DWORD)dosHeader + (DWORD)dosHeader->e_lfanew); EntryPoint = (LPENTRYPOINT)(pNTHeader->OptionalHeader.AddressOfEntryPoint + (DWORD)dosHeader); EntryPoint((HINSTANCE)dosHeader, DLL_PROCESS_DETACH, 0); return VirtualFree(dosHeader, 0, MEM_RELEASE); } BOOL IsNT() { DWORD dwWinVer; dwWinVer = GetVersion(); dwWinVer = dwWinVer >> 31; return (dwWinVer == 0 ? TRUE : FALSE); }