/* ANSI.c - ANSI escape sequence console driver. Jason Hood, 21 & 22 October, 2005. Derived from ANSI.xs by Jean-Louis Morel, from his Perl package Win32::Console::ANSI. I removed the codepage conversion ("\e(") and added WriteConsole hooking. v1.01, 11 & 12 March, 2006: disable when console has disabled processed output; \e[5m (blink) is the same as \e[4m (underline); do not conceal control characters (0 to 31); \e[m will restore original color. v1.10, 22 February, 2009: fix MyWriteConsoleW for strings longer than the buffer; initialise attributes to current; hook into child processes. v1.11, 28 February, 2009: fix hooking into child processes (only do console executables). v1.12, 9 March, 2009: really fix hooking (I didn't realise MinGW didn't generate relocations). v1.13, 21 & 27 March, 2009: alternate injection method, to work with DEP; use Unicode and the current output code page (not OEMCP). v1.14, 3 April, 2009: fix test for empty import section. v1.15, 17 May, 2009: properly update lpNumberOfCharsWritten in MyWriteConsoleA. v1.20, 26 & 29 May, 17 to 21 June, 2009: create an ANSICON environment variable; hook GetEnvironmentVariable to create ANSICON dynamically; use another injection method. v1.22, 5 October, 2009: hook LoadLibrary to intercept the newly loaded functions. v1.23, 11 November, 2009: unload gracefully; conceal characters by making foreground same as background; reverse the bold/underline attributes, too. v1.25, 15, 20 & 21 July, 2010: hook LoadLibraryEx (now cscript works); Win7 support. v1.30, 3 August to 7 September, 2010: x64 support. v1.31, 13 November, 2010: fix multibyte conversion problems. */ #ifndef UNICODE # define UNICODE #endif #define WIN32_LEAN_AND_MEAN #include #include #include #include #include #include "injdll.h" #define lenof(array) (sizeof(array)/sizeof(*(array))) #define isdigit(c) ('0' <= (c) && (c) <= '9') // ========== Auxiliary debug function #define MYDEBUG 0 // no debugging //#define MYDEBUG 1 // use OutputDebugString //#define MYDEBUG 2 // use %temp%\ansicon.log #if (MYDEBUG > 0) #if (MYDEBUG > 1) char tempfile[MAX_PATH]; #endif void DEBUGSTR( LPTSTR szFormat, ... ) // sort of OutputDebugStringf { TCHAR szBuffer[1024], szEscape[1024]; va_list pArgList; va_start( pArgList, szFormat ); _vsnwprintf( szBuffer, lenof(szBuffer), szFormat, pArgList ); va_end( pArgList ); szFormat = szBuffer; if (*szFormat == '\\') { BOOL first = TRUE; LPTSTR pos = szEscape; while (*++szFormat != '\0' && pos < szEscape + lenof(szEscape) - 4) { if (*szFormat < 32) { *pos++ = '\\'; switch (*szFormat) { case '\b': *pos++ = 'b'; break; case '\t': *pos++ = 't'; break; case '\r': *pos++ = 'r'; break; case '\n': *pos++ = 'n'; break; case 27 : *pos++ = 'e'; break; default: pos += wprintf( pos, L"%.*o", (szFormat[1] >= '0' && szFormat[1] <= '7') ? 3 : 1, *szFormat ); } } else if (*szFormat == '"') { if (first) first = FALSE; else if (szFormat[1] == '\0') ; else *pos++ = '\\'; *pos++ = '"'; } else { *pos++ = *szFormat; } } *pos = '\0'; szFormat = szEscape; } #if (MYDEBUG > 1) { FILE* file = fopen( tempfile, "a" ); if (file != NULL) { fwprintf( file, L"%s\n", szFormat ); fclose( file ); } } #else OutputDebugString( szFormat ); #endif } #else #if defined(_MSC_VER) && _MSC_VER <= 1400 void DEBUGSTR() { } #else #define DEBUGSTR(...) #endif #endif // ========== Global variables and constants // Macro for adding pointers/DWORDs together without C arithmetic interfering #define MakePtr( cast, ptr, addValue ) (cast)((DWORD_PTR)(ptr)+(DWORD)(addValue)) const char APIKernel[] = "kernel32.dll"; const char APIKernelBase[] = "kernelbase.dll"; const char APIConsole[] = "API-MS-Win-Core-Console-L1-1-0.dll"; const char APIProcessThreads[] = "API-MS-Win-Core-ProcessThreads-L1-1-0.dll"; const char APIProcessEnvironment[] = "API-MS-Win-Core-ProcessEnvironment-L1-1-0.dll"; const char APILibraryLoader[] = "API-MS-Win-Core-LibraryLoader-L1-1-0.dll"; const char APIFile[] = "API-MS-Win-Core-File-L1-1-0.dll"; PCSTR APIs[] = { APIKernel, APIConsole, APIProcessThreads, APIProcessEnvironment, APILibraryLoader, APIFile, NULL }; HMODULE hKernel; // Kernel32 module handle HINSTANCE hDllInstance; // Dll instance handle HANDLE hConOut; // handle to CONOUT$ #define ESC '\x1B' // ESCape character #define MAX_ARG 16 // max number of args in an escape sequence int state; // automata state //TCHAR prefix; // escape sequence prefix ( '[' or '(' ); TCHAR suffix; // escape sequence suffix int es_argc; // escape sequence args count int es_argv[MAX_ARG]; // escape sequence args // color constants #define FOREGROUND_BLACK 0 #define FOREGROUND_WHITE FOREGROUND_RED|FOREGROUND_GREEN|FOREGROUND_BLUE #define BACKGROUND_BLACK 0 #define BACKGROUND_WHITE BACKGROUND_RED|BACKGROUND_GREEN|BACKGROUND_BLUE WORD foregroundcolor[8] = { FOREGROUND_BLACK, // black foreground FOREGROUND_RED, // red foreground FOREGROUND_GREEN, // green foreground FOREGROUND_RED | FOREGROUND_GREEN, // yellow foreground FOREGROUND_BLUE, // blue foreground FOREGROUND_BLUE | FOREGROUND_RED, // magenta foreground FOREGROUND_BLUE | FOREGROUND_GREEN, // cyan foreground FOREGROUND_WHITE // white foreground }; WORD backgroundcolor[8] = { BACKGROUND_BLACK, // black background BACKGROUND_RED, // red background BACKGROUND_GREEN, // green background BACKGROUND_RED | BACKGROUND_GREEN, // yellow background BACKGROUND_BLUE, // blue background BACKGROUND_BLUE | BACKGROUND_RED, // magenta background BACKGROUND_BLUE | BACKGROUND_GREEN, // cyan background BACKGROUND_WHITE, // white background }; // screen attributes WORD org_fg, org_bg, org_bold, org_ul; // original attributes WORD foreground; WORD background; WORD bold; WORD underline; WORD rvideo; WORD concealed; // saved cursor position COORD SavePos; // ========== Hooking API functions // // References about API hooking (and dll injection): // - Matt Pietrek ~ Windows 95 System Programming Secrets. // - Jeffrey Richter ~ Programming Applications for Microsoft Windows 4th ed. typedef struct { PCSTR lib; PSTR name; PROC newfunc; PROC oldfunc; PROC apifunc; } HookFn, *PHookFn; HookFn Hooks[]; //----------------------------------------------------------------------------- // HookAPIOneMod // Substitute a new function in the Import Address Table (IAT) of the // specified module. // Return FALSE on error and TRUE on success. //----------------------------------------------------------------------------- BOOL HookAPIOneMod( HMODULE hFromModule, // Handle of the module to intercept calls from PHookFn Hooks, // Functions to replace BOOL restore // Restore the original functions ) { PIMAGE_DOS_HEADER pDosHeader; PIMAGE_NT_HEADERS pNTHeader; PIMAGE_IMPORT_DESCRIPTOR pImportDesc; PIMAGE_THUNK_DATA pThunk; PHookFn hook; // Tests to make sure we're looking at a module image (the 'MZ' header) pDosHeader = (PIMAGE_DOS_HEADER)hFromModule; if (pDosHeader->e_magic != IMAGE_DOS_SIGNATURE) { DEBUGSTR( L"error: %S(%d)", __FILE__, __LINE__ ); return FALSE; } // The MZ header has a pointer to the PE header pNTHeader = MakePtr( PIMAGE_NT_HEADERS, pDosHeader, pDosHeader->e_lfanew ); // One more test to make sure we're looking at a "PE" image if (pNTHeader->Signature != IMAGE_NT_SIGNATURE) { DEBUGSTR( L"error: %S(%d)", __FILE__, __LINE__ ); return FALSE; } // We now have a valid pointer to the module's PE header. // Get a pointer to its imports section. pImportDesc = MakePtr( PIMAGE_IMPORT_DESCRIPTOR, pDosHeader, pNTHeader->OptionalHeader. DataDirectory[IMAGE_DIRECTORY_ENTRY_IMPORT]. VirtualAddress ); // Bail out if the RVA of the imports section is 0 (it doesn't exist) if (pImportDesc == (PIMAGE_IMPORT_DESCRIPTOR)pDosHeader) { return TRUE; } // Iterate through the array of imported module descriptors, looking // for the module whose name matches the pszFunctionModule parameter. for (; pImportDesc->Name; pImportDesc++) { PCSTR* lib; PSTR pszModName = MakePtr( PSTR, pDosHeader, pImportDesc->Name ); for (lib = APIs; *lib; ++lib) if (_stricmp( pszModName, *lib ) == 0) break; if (*lib == NULL) continue; // Get a pointer to the found module's import address table (IAT). pThunk = MakePtr( PIMAGE_THUNK_DATA, pDosHeader, pImportDesc->FirstThunk ); // Blast through the table of import addresses, looking for the ones // that match the original addresses. while (pThunk->u1.Function) { for (hook = Hooks; hook->name; ++hook) { PROC patch = 0; if (restore) { if ((PROC)pThunk->u1.Function == hook->newfunc) patch = (lib == APIs) ? hook->oldfunc : hook->apifunc; } else if ((PROC)pThunk->u1.Function == hook->oldfunc || (PROC)pThunk->u1.Function == hook->apifunc) { patch = hook->newfunc; } if (patch) { DWORD flOldProtect, flNewProtect, flDummy; MEMORY_BASIC_INFORMATION mbi; DEBUGSTR( L" %S", hook->name ); // Get the current protection attributes. VirtualQuery( &pThunk->u1.Function, &mbi, sizeof(mbi) ); // Take the access protection flags. flNewProtect = mbi.Protect; // Remove ReadOnly and ExecuteRead flags. flNewProtect &= ~(PAGE_READONLY | PAGE_EXECUTE_READ); // Add on ReadWrite flag flNewProtect |= (PAGE_READWRITE); // Change the access protection on the region of committed pages in the // virtual address space of the current process. VirtualProtect( &pThunk->u1.Function, sizeof(PVOID), flNewProtect, &flOldProtect ); // Overwrite the original address with the address of the new function. if (!WriteProcessMemory( GetCurrentProcess(), &pThunk->u1.Function, &patch, sizeof(patch), NULL )) { DEBUGSTR( L"error: %S(%d)", __FILE__, __LINE__ ); return FALSE; } // Put the page attributes back the way they were. VirtualProtect( &pThunk->u1.Function, sizeof(PVOID), flOldProtect, &flDummy ); } } pThunk++; // Advance to next imported function address } } return TRUE; // Function not found } //----------------------------------------------------------------------------- // HookAPIAllMod // Substitute a new function in the Import Address Table (IAT) of all // the modules in the current process. // Return FALSE on error and TRUE on success. //----------------------------------------------------------------------------- BOOL HookAPIAllMod( PHookFn Hooks, BOOL restore ) { HANDLE hModuleSnap; MODULEENTRY32 me; BOOL fOk; // Take a snapshot of all modules in the current process. hModuleSnap = CreateToolhelp32Snapshot( TH32CS_SNAPMODULE, GetCurrentProcessId() ); if (hModuleSnap == INVALID_HANDLE_VALUE) { DEBUGSTR( L"error: %S(%d)", __FILE__, __LINE__ ); return FALSE; } // Fill the size of the structure before using it. me.dwSize = sizeof(MODULEENTRY32); // Walk the module list of the modules. for (fOk = Module32First( hModuleSnap, &me ); fOk; fOk = Module32Next( hModuleSnap, &me )) { // We don't hook functions in our own module. if (me.hModule != hDllInstance && me.hModule != hKernel) { DEBUGSTR( (restore) ? L"Unhooking from %s" : L"Hooking in %s", me.szModule ); // Hook this function in this module. if (!HookAPIOneMod( me.hModule, Hooks, restore )) { CloseHandle( hModuleSnap ); return FALSE; } } } CloseHandle( hModuleSnap ); return TRUE; } // ========== Print Buffer functions #define BUFFER_SIZE 256 int nCharInBuffer = 0; TCHAR ChBuffer[BUFFER_SIZE]; //----------------------------------------------------------------------------- // FlushBuffer() // Writes the buffer to the console and empties it. //----------------------------------------------------------------------------- void FlushBuffer( void ) { DWORD nWritten; if (nCharInBuffer <= 0) return; WriteConsole( hConOut, ChBuffer, nCharInBuffer, &nWritten, NULL ); nCharInBuffer = 0; } //----------------------------------------------------------------------------- // PushBuffer( char c ) // Adds a character in the buffer and flushes the buffer if it is full. //----------------------------------------------------------------------------- void PushBuffer( TCHAR c ) { ChBuffer[nCharInBuffer++] = c; if (nCharInBuffer >= BUFFER_SIZE) { FlushBuffer(); DEBUGSTR( L"flush" ); } } // ========== Print functions //----------------------------------------------------------------------------- // InterpretEscSeq() // Interprets the last escape sequence scanned by ParseAndPrintString // prefix escape sequence prefix // es_argc escape sequence args count // es_argv[] escape sequence args array // suffix escape sequence suffix // // for instance, with \e[33;45;1m we have // prefix = '[', // es_argc = 3, es_argv[0] = 33, es_argv[1] = 45, es_argv[2] = 1 // suffix = 'm' //----------------------------------------------------------------------------- void InterpretEscSeq( void ) { int i; WORD attribut; CONSOLE_SCREEN_BUFFER_INFO Info; DWORD len, NumberOfCharsWritten; COORD Pos; SMALL_RECT Rect; CHAR_INFO CharInfo; //if (prefix == '[') { GetConsoleScreenBufferInfo( hConOut, &Info ); switch (suffix) { case 'm': if (es_argc == 0) es_argv[es_argc++] = 0; for (i = 0; i < es_argc; i++) { switch (es_argv[i]) { case 0: foreground = org_fg; background = org_bg; bold = (es_argc == 1) ? org_bold : 0; underline = (es_argc == 1) ? org_ul : 0; rvideo = 0; concealed = 0; break; case 1: bold = FOREGROUND_INTENSITY; break; case 5: /* blink */ case 4: underline = BACKGROUND_INTENSITY; break; case 7: rvideo = 1; break; case 8: concealed = 1; break; case 21: bold = 0; break; case 25: case 24: underline = 0; break; case 27: rvideo = 0; break; case 28: concealed = 0; break; } if (30 <= es_argv[i] && es_argv[i] <= 37) foreground = es_argv[i]-30; if (40 <= es_argv[i] && es_argv[i] <= 47) background = es_argv[i]-40; } if (concealed) { if (rvideo) { attribut = foregroundcolor[foreground] | backgroundcolor[foreground]; if (bold) attribut |= FOREGROUND_INTENSITY | BACKGROUND_INTENSITY; } else { attribut = foregroundcolor[background] | backgroundcolor[background]; if (underline) attribut |= FOREGROUND_INTENSITY | BACKGROUND_INTENSITY; } } else if (rvideo) { attribut = foregroundcolor[background] | backgroundcolor[foreground]; if (bold) attribut |= BACKGROUND_INTENSITY; if (underline) attribut |= FOREGROUND_INTENSITY; } else attribut = foregroundcolor[foreground] | backgroundcolor[background] | bold | underline; SetConsoleTextAttribute( hConOut, attribut ); return; case 'J': if (es_argc == 0) es_argv[es_argc++] = 0; // ESC[J == ESC[0J if (es_argc != 1) return; switch (es_argv[0]) { case 0: // ESC[0J erase from cursor to end of display len = (Info.dwSize.Y - Info.dwCursorPosition.Y - 1) * Info.dwSize.X + Info.dwSize.X - Info.dwCursorPosition.X - 1; FillConsoleOutputCharacter( hConOut, ' ', len, Info.dwCursorPosition, &NumberOfCharsWritten ); FillConsoleOutputAttribute( hConOut, Info.wAttributes, len, Info.dwCursorPosition, &NumberOfCharsWritten ); return; case 1: // ESC[1J erase from start to cursor. Pos.X = 0; Pos.Y = 0; len = Info.dwCursorPosition.Y * Info.dwSize.X + Info.dwCursorPosition.X + 1; FillConsoleOutputCharacter( hConOut, ' ', len, Pos, &NumberOfCharsWritten ); FillConsoleOutputAttribute( hConOut, Info.wAttributes, len, Pos, &NumberOfCharsWritten ); return; case 2: // ESC[2J Clear screen and home cursor Pos.X = 0; Pos.Y = 0; len = Info.dwSize.X * Info.dwSize.Y; FillConsoleOutputCharacter( hConOut, ' ', len, Pos, &NumberOfCharsWritten ); FillConsoleOutputAttribute( hConOut, Info.wAttributes, len, Pos, &NumberOfCharsWritten ); SetConsoleCursorPosition( hConOut, Pos ); return; default: return; } case 'K': if (es_argc == 0) es_argv[es_argc++] = 0; // ESC[K == ESC[0K if (es_argc != 1) return; switch (es_argv[0]) { case 0: // ESC[0K Clear to end of line len = Info.srWindow.Right - Info.dwCursorPosition.X + 1; FillConsoleOutputCharacter( hConOut, ' ', len, Info.dwCursorPosition, &NumberOfCharsWritten ); FillConsoleOutputAttribute( hConOut, Info.wAttributes, len, Info.dwCursorPosition, &NumberOfCharsWritten ); return; case 1: // ESC[1K Clear from start of line to cursor Pos.X = 0; Pos.Y = Info.dwCursorPosition.Y; FillConsoleOutputCharacter( hConOut, ' ', Info.dwCursorPosition.X + 1, Pos, &NumberOfCharsWritten ); FillConsoleOutputAttribute( hConOut, Info.wAttributes, Info.dwCursorPosition.X + 1, Pos, &NumberOfCharsWritten ); return; case 2: // ESC[2K Clear whole line. Pos.X = 0; Pos.Y = Info.dwCursorPosition.Y; FillConsoleOutputCharacter( hConOut, ' ', Info.dwSize.X, Pos, &NumberOfCharsWritten ); FillConsoleOutputAttribute( hConOut, Info.wAttributes, Info.dwSize.X, Pos, &NumberOfCharsWritten ); return; default: return; } case 'L': // ESC[#L Insert # blank lines. if (es_argc == 0) es_argv[es_argc++] = 1; // ESC[L == ESC[1L if (es_argc != 1) return; Rect.Left = 0; Rect.Top = Info.dwCursorPosition.Y; Rect.Right = Info.dwSize.X - 1; Rect.Bottom = Info.dwSize.Y - 1; Pos.X = 0; Pos.Y = Info.dwCursorPosition.Y + es_argv[0]; CharInfo.Char.UnicodeChar = ' '; CharInfo.Attributes = Info.wAttributes; ScrollConsoleScreenBuffer( hConOut, &Rect, NULL, Pos, &CharInfo ); return; case 'M': // ESC[#M Delete # lines. if (es_argc == 0) es_argv[es_argc++] = 1; // ESC[M == ESC[1M if (es_argc != 1) return; if (es_argv[0] > Info.dwSize.Y - Info.dwCursorPosition.Y) es_argv[0] = Info.dwSize.Y - Info.dwCursorPosition.Y; Rect.Left = 0; Rect.Top = Info.dwCursorPosition.Y + es_argv[0]; Rect.Right = Info.dwSize.X - 1; Rect.Bottom = Info.dwSize.Y - 1; Pos.X = 0; Pos.Y = Info.dwCursorPosition.Y; CharInfo.Char.UnicodeChar = ' '; CharInfo.Attributes = Info.wAttributes; ScrollConsoleScreenBuffer( hConOut, &Rect, NULL, Pos, &CharInfo ); return; case 'P': // ESC[#P Delete # characters. if (es_argc == 0) es_argv[es_argc++] = 1; // ESC[P == ESC[1P if (es_argc != 1) return; if (Info.dwCursorPosition.X + es_argv[0] > Info.dwSize.X - 1) es_argv[0] = Info.dwSize.X - Info.dwCursorPosition.X; Rect.Left = Info.dwCursorPosition.X + es_argv[0]; Rect.Top = Info.dwCursorPosition.Y; Rect.Right = Info.dwSize.X - 1; Rect.Bottom = Info.dwCursorPosition.Y; CharInfo.Char.UnicodeChar = ' '; CharInfo.Attributes = Info.wAttributes; ScrollConsoleScreenBuffer( hConOut, &Rect, NULL, Info.dwCursorPosition, &CharInfo ); return; case '@': // ESC[#@ Insert # blank characters. if (es_argc == 0) es_argv[es_argc++] = 1; // ESC[@ == ESC[1@ if (es_argc != 1) return; if (Info.dwCursorPosition.X + es_argv[0] > Info.dwSize.X - 1) es_argv[0] = Info.dwSize.X - Info.dwCursorPosition.X; Rect.Left = Info.dwCursorPosition.X; Rect.Top = Info.dwCursorPosition.Y; Rect.Right = Info.dwSize.X - 1 - es_argv[0]; Rect.Bottom = Info.dwCursorPosition.Y; Pos.X = Info.dwCursorPosition.X + es_argv[0]; Pos.Y = Info.dwCursorPosition.Y; CharInfo.Char.UnicodeChar = ' '; CharInfo.Attributes = Info.wAttributes; ScrollConsoleScreenBuffer( hConOut, &Rect, NULL, Pos, &CharInfo ); return; case 'A': // ESC[#A Moves cursor up # lines if (es_argc == 0) es_argv[es_argc++] = 1; // ESC[A == ESC[1A if (es_argc != 1) return; Pos.Y = Info.dwCursorPosition.Y - es_argv[0]; if (Pos.Y < 0) Pos.Y = 0; Pos.X = Info.dwCursorPosition.X; SetConsoleCursorPosition( hConOut, Pos ); return; case 'B': // ESC[#B Moves cursor down # lines if (es_argc == 0) es_argv[es_argc++] = 1; // ESC[B == ESC[1B if (es_argc != 1) return; Pos.Y = Info.dwCursorPosition.Y + es_argv[0]; if (Pos.Y >= Info.dwSize.Y) Pos.Y = Info.dwSize.Y - 1; Pos.X = Info.dwCursorPosition.X; SetConsoleCursorPosition( hConOut, Pos ); return; case 'C': // ESC[#C Moves cursor forward # spaces if (es_argc == 0) es_argv[es_argc++] = 1; // ESC[C == ESC[1C if (es_argc != 1) return; Pos.X = Info.dwCursorPosition.X + es_argv[0]; if (Pos.X >= Info.dwSize.X) Pos.X = Info.dwSize.X - 1; Pos.Y = Info.dwCursorPosition.Y; SetConsoleCursorPosition( hConOut, Pos ); return; case 'D': // ESC[#D Moves cursor back # spaces if (es_argc == 0) es_argv[es_argc++] = 1; // ESC[D == ESC[1D if (es_argc != 1) return; Pos.X = Info.dwCursorPosition.X - es_argv[0]; if (Pos.X < 0) Pos.X = 0; Pos.Y = Info.dwCursorPosition.Y; SetConsoleCursorPosition( hConOut, Pos ); return; case 'E': // ESC[#E Moves cursor down # lines, column 1. if (es_argc == 0) es_argv[es_argc++] = 1; // ESC[E == ESC[1E if (es_argc != 1) return; Pos.Y = Info.dwCursorPosition.Y + es_argv[0]; if (Pos.Y >= Info.dwSize.Y) Pos.Y = Info.dwSize.Y - 1; Pos.X = 0; SetConsoleCursorPosition( hConOut, Pos ); return; case 'F': // ESC[#F Moves cursor up # lines, column 1. if (es_argc == 0) es_argv[es_argc++] = 1; // ESC[F == ESC[1F if (es_argc != 1) return; Pos.Y = Info.dwCursorPosition.Y - es_argv[0]; if (Pos.Y < 0) Pos.Y = 0; Pos.X = 0; SetConsoleCursorPosition( hConOut, Pos ); return; case 'G': // ESC[#G Moves cursor column # in current row. if (es_argc == 0) es_argv[es_argc++] = 1; // ESC[G == ESC[1G if (es_argc != 1) return; Pos.X = es_argv[0] - 1; if (Pos.X >= Info.dwSize.X) Pos.X = Info.dwSize.X - 1; if (Pos.X < 0) Pos.X = 0; Pos.Y = Info.dwCursorPosition.Y; SetConsoleCursorPosition( hConOut, Pos ); return; case 'f': // ESC[#;#f case 'H': // ESC[#;#H Moves cursor to line #, column # if (es_argc == 0) es_argv[es_argc++] = 1; // ESC[H == ESC[1;1H if (es_argc == 1) es_argv[es_argc++] = 1; // ESC[#H == ESC[#;1H if (es_argc > 2) return; Pos.X = es_argv[1] - 1; if (Pos.X < 0) Pos.X = 0; if (Pos.X >= Info.dwSize.X) Pos.X = Info.dwSize.X - 1; Pos.Y = es_argv[0] - 1; if (Pos.Y < 0) Pos.Y = 0; if (Pos.Y >= Info.dwSize.Y) Pos.Y = Info.dwSize.Y - 1; SetConsoleCursorPosition( hConOut, Pos ); return; case 's': // ESC[s Saves cursor position for recall later if (es_argc != 0) return; SavePos = Info.dwCursorPosition; return; case 'u': // ESC[u Return to saved cursor position if (es_argc != 0) return; SetConsoleCursorPosition( hConOut, SavePos ); return; default: return; } } } //----------------------------------------------------------------------------- // ParseAndPrintString(hDev, lpBuffer, nNumberOfBytesToWrite) // Parses the string lpBuffer, interprets the escapes sequences and prints the // characters in the device hDev (console). // The lexer is a three states automata. // If the number of arguments es_argc > MAX_ARG, only the MAX_ARG-1 firsts and // the last arguments are processed (no es_argv[] overflow). //----------------------------------------------------------------------------- BOOL ParseAndPrintString( HANDLE hDev, LPCVOID lpBuffer, DWORD nNumberOfBytesToWrite, LPDWORD lpNumberOfBytesWritten ) { DWORD i; LPTSTR s; if (hDev != hConOut) // reinit if device has changed { hConOut = hDev; state = 1; } for (i = nNumberOfBytesToWrite, s = (LPTSTR)lpBuffer; i > 0; i--, s++) { if (state == 1) { if (*s == ESC) state = 2; else PushBuffer( *s ); } else if (state == 2) { if (*s == ESC) ; // \e\e...\e == \e else if ((*s == '[')) // || (*s == '(')) { FlushBuffer(); //prefix = *s; state = 3; } else state = 1; } else if (state == 3) { if (isdigit( *s )) { es_argc = 0; es_argv[0] = *s - '0'; state = 4; } else if (*s == ';') { es_argc = 1; es_argv[0] = 0; es_argv[1] = 0; state = 4; } else { es_argc = 0; suffix = *s; InterpretEscSeq(); state = 1; } } else if (state == 4) { if (isdigit( *s )) { es_argv[es_argc] = 10 * es_argv[es_argc] + (*s - '0'); } else if (*s == ';') { if (es_argc < MAX_ARG-1) es_argc++; es_argv[es_argc] = 0; } else { es_argc++; suffix = *s; InterpretEscSeq(); state = 1; } } } FlushBuffer(); *lpNumberOfBytesWritten = nNumberOfBytesToWrite - i; return( i == 0 ); } // ========== Child process injection // Inject code into the target process to load our DLL. void Inject( LPPROCESS_INFORMATION pinfo, LPPROCESS_INFORMATION lpi, DWORD dwCreationFlags ) { char* ptr = 0; MEMORY_BASIC_INFORMATION minfo; BOOL con = FALSE; #ifdef _WIN64 BOOL x86 = FALSE; #endif while (VirtualQueryEx( pinfo->hProcess, ptr, &minfo, sizeof(minfo) )) { IMAGE_DOS_HEADER dos_header; SIZE_T read; if (ReadProcessMemory( pinfo->hProcess, minfo.AllocationBase, &dos_header, sizeof(dos_header), &read )) { if (dos_header.e_magic == IMAGE_DOS_SIGNATURE) { IMAGE_NT_HEADERS nt_header; if (ReadProcessMemory( pinfo->hProcess, (char*)minfo.AllocationBase + dos_header.e_lfanew, &nt_header, sizeof(nt_header), &read )) { if (nt_header.Signature == IMAGE_NT_SIGNATURE) { if (nt_header.OptionalHeader.Subsystem == IMAGE_SUBSYSTEM_WINDOWS_CUI) { if (nt_header.FileHeader.Machine == IMAGE_FILE_MACHINE_I386) { con = TRUE; #ifdef _WIN64 x86 = TRUE; } else if (nt_header.FileHeader.Machine == IMAGE_FILE_MACHINE_AMD64) { con = TRUE; #endif } else { DEBUGSTR( L" Ignoring unsupported machine (%x)", nt_header.FileHeader.Machine ); } } else { DEBUGSTR( L" Ignoring non-console subsystem (%u)", nt_header.OptionalHeader.Subsystem ); } break; } } } } ptr += minfo.RegionSize; } if (con) { WCHAR dll[MAX_PATH]; #ifdef _WIN64 DWORD len = GetModuleFileName( GetModuleHandleA( "ANSI64.dll" ), dll, lenof(dll) ); if (x86) { dll[len-6] = '3'; dll[len-5] = '2'; InjectDLL32( pinfo, dll ); } else { InjectDLL64( pinfo, dll ); } #else GetModuleFileName( GetModuleHandleA( "ANSI32.dll" ), dll, lenof(dll) ); InjectDLL32( pinfo, dll ); #endif } if (lpi) memcpy( lpi, pinfo, sizeof(PROCESS_INFORMATION) ); if (!(dwCreationFlags & CREATE_SUSPENDED)) ResumeThread( pinfo->hThread ); } BOOL WINAPI MyCreateProcessA( LPCSTR lpApplicationName, LPSTR lpCommandLine, LPSECURITY_ATTRIBUTES lpThreadAttributes, LPSECURITY_ATTRIBUTES lpProcessAttributes, BOOL bInheritHandles, DWORD dwCreationFlags, LPVOID lpEnvironment, LPCSTR lpCurrentDirectory, LPSTARTUPINFOA lpStartupInfo, LPPROCESS_INFORMATION lpProcessInformation ) { PROCESS_INFORMATION pi; if (!CreateProcessA( lpApplicationName, lpCommandLine, lpThreadAttributes, lpProcessAttributes, bInheritHandles, dwCreationFlags | CREATE_SUSPENDED, lpEnvironment, lpCurrentDirectory, lpStartupInfo, &pi )) return FALSE; DEBUGSTR( L"CreateProcessA: \"%S\", \"%S\"", (lpApplicationName == NULL) ? "" : lpApplicationName, (lpCommandLine == NULL) ? "" : lpCommandLine ); Inject( &pi, lpProcessInformation, dwCreationFlags ); return TRUE; } BOOL WINAPI MyCreateProcessW( LPCWSTR lpApplicationName, LPWSTR lpCommandLine, LPSECURITY_ATTRIBUTES lpThreadAttributes, LPSECURITY_ATTRIBUTES lpProcessAttributes, BOOL bInheritHandles, DWORD dwCreationFlags, LPVOID lpEnvironment, LPCWSTR lpCurrentDirectory, LPSTARTUPINFOW lpStartupInfo, LPPROCESS_INFORMATION lpProcessInformation ) { PROCESS_INFORMATION pi; if (!CreateProcessW( lpApplicationName, lpCommandLine, lpThreadAttributes, lpProcessAttributes, bInheritHandles, dwCreationFlags | CREATE_SUSPENDED, lpEnvironment, lpCurrentDirectory, lpStartupInfo, &pi )) return FALSE; DEBUGSTR( L"CreateProcessW: \"%s\", \"%s\"", (lpApplicationName == NULL) ? L"" : lpApplicationName, (lpCommandLine == NULL) ? L"" : lpCommandLine ); Inject( &pi, lpProcessInformation, dwCreationFlags ); return TRUE; } HMODULE WINAPI MyLoadLibraryA( LPCSTR lpFileName ) { HMODULE hMod = LoadLibraryA( lpFileName ); if (hMod && hMod != hKernel) { DEBUGSTR( L"Hooking in %S (LoadLibraryA)", lpFileName ); HookAPIOneMod( hMod, Hooks, FALSE ); } return hMod; } HMODULE WINAPI MyLoadLibraryW( LPCWSTR lpFileName ) { HMODULE hMod = LoadLibraryW( lpFileName ); if (hMod && hMod != hKernel) { DEBUGSTR( L"Hooking in %s (LoadLibraryW)", lpFileName ); HookAPIOneMod( hMod, Hooks, FALSE ); } return hMod; } HMODULE WINAPI MyLoadLibraryExA( LPCSTR lpFileName, HANDLE hFile, DWORD dwFlags ) { HMODULE hMod = LoadLibraryExA( lpFileName, hFile, dwFlags ); if (hMod && hMod != hKernel && !(dwFlags & LOAD_LIBRARY_AS_DATAFILE)) { DEBUGSTR( L"Hooking in %S (LoadLibraryExA)", lpFileName ); HookAPIOneMod( hMod, Hooks, FALSE ); } return hMod; } HMODULE WINAPI MyLoadLibraryExW( LPCWSTR lpFileName, HANDLE hFile, DWORD dwFlags ) { HMODULE hMod = LoadLibraryExW( lpFileName, hFile, dwFlags ); if (hMod && hMod != hKernel && !(dwFlags & LOAD_LIBRARY_AS_DATAFILE)) { DEBUGSTR( L"Hooking in %s (LoadLibraryExW)", lpFileName ); HookAPIOneMod( hMod, Hooks, FALSE ); } return hMod; } //----------------------------------------------------------------------------- // MyWrite... // It is the new function that must replace the original Write... function. // This function have exactly the same signature as the original one. //----------------------------------------------------------------------------- BOOL WINAPI MyWriteConsoleA( HANDLE hCon, LPCVOID lpBuffer, DWORD nNumberOfCharsToWrite, LPDWORD lpNumberOfCharsWritten, LPVOID lpReserved ) { DWORD Mode; LPWSTR buf; DWORD len; BOOL rc = TRUE; // if we write in a console buffer with processed output if (GetConsoleMode( hCon, &Mode ) && (Mode & ENABLE_PROCESSED_OUTPUT)) { UINT cp = GetConsoleOutputCP(); DEBUGSTR( L"\\WriteConsoleA: %lu \"%.*S\"", nNumberOfCharsToWrite, nNumberOfCharsToWrite, lpBuffer ); len = MultiByteToWideChar( cp, 0, lpBuffer, nNumberOfCharsToWrite, NULL, 0 ); buf = malloc( len * sizeof(WCHAR) ); if (buf == NULL) { *lpNumberOfCharsWritten = 0; return (nNumberOfCharsToWrite == 0); } MultiByteToWideChar( cp, 0, lpBuffer, nNumberOfCharsToWrite, buf, len ); rc = ParseAndPrintString( hCon, buf, len, lpNumberOfCharsWritten ); free( buf ); return rc; } else { return WriteConsoleA( hCon, lpBuffer, nNumberOfCharsToWrite, lpNumberOfCharsWritten, lpReserved ); } } BOOL WINAPI MyWriteConsoleW( HANDLE hCon, LPCVOID lpBuffer, DWORD nNumberOfCharsToWrite, LPDWORD lpNumberOfCharsWritten, LPVOID lpReserved ) { DWORD Mode; if (GetConsoleMode( hCon, &Mode ) && (Mode & ENABLE_PROCESSED_OUTPUT)) { DEBUGSTR( L"\\WriteConsoleW: %lu \"%.*s\"", nNumberOfCharsToWrite, nNumberOfCharsToWrite, lpBuffer ); return ParseAndPrintString( hCon, lpBuffer, nNumberOfCharsToWrite, lpNumberOfCharsWritten ); } else { return WriteConsoleW( hCon, lpBuffer, nNumberOfCharsToWrite, lpNumberOfCharsWritten, lpReserved ); } } BOOL WINAPI MyWriteFile( HANDLE hFile, LPCVOID lpBuffer, DWORD nNumberOfBytesToWrite, LPDWORD lpNumberOfBytesWritten, LPOVERLAPPED lpOverlapped ) { DWORD Mode; if (GetConsoleMode( hFile, &Mode ) && (Mode & ENABLE_PROCESSED_OUTPUT)) { DEBUGSTR( L"\\WriteFile: %lu \"%.*S\"", nNumberOfBytesToWrite, nNumberOfBytesToWrite, lpBuffer ); return MyWriteConsoleA( hFile, lpBuffer, nNumberOfBytesToWrite, lpNumberOfBytesWritten, lpOverlapped ); } else // here, WriteFile is the old function (this module is not hooked) { return WriteFile( hFile, lpBuffer, nNumberOfBytesToWrite, lpNumberOfBytesWritten, lpOverlapped ); } } // ========== Environment variable void set_ansicon( PCONSOLE_SCREEN_BUFFER_INFO pcsbi ) { CONSOLE_SCREEN_BUFFER_INFO csbi; TCHAR buf[64]; if (pcsbi == NULL) { HANDLE hConOut; hConOut = CreateFile( L"CONOUT$", GENERIC_READ | GENERIC_WRITE, FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING, 0, 0 ); GetConsoleScreenBufferInfo( hConOut, &csbi ); CloseHandle( hConOut ); pcsbi = &csbi; } wsprintf( buf, L"%dx%d (%dx%d)", pcsbi->dwSize.X, pcsbi->dwSize.Y, pcsbi->srWindow.Right - pcsbi->srWindow.Left + 1, pcsbi->srWindow.Bottom - pcsbi->srWindow.Top + 1 ); SetEnvironmentVariable( L"ANSICON", buf ); } DWORD WINAPI MyGetEnvironmentVariableA( LPCSTR lpName, LPSTR lpBuffer, DWORD nSize ) { if (lstrcmpiA( lpName, "ANSICON" ) == 0) set_ansicon( NULL ); return GetEnvironmentVariableA( lpName, lpBuffer, nSize ); } DWORD WINAPI MyGetEnvironmentVariableW( LPCWSTR lpName, LPWSTR lpBuffer, DWORD nSize ) { if (lstrcmpi( lpName, L"ANSICON" ) == 0) set_ansicon( NULL ); return GetEnvironmentVariableW( lpName, lpBuffer, nSize ); } // ========== Initialisation HookFn Hooks[] = { { APIProcessThreads, "CreateProcessA", (PROC)MyCreateProcessA, NULL, NULL }, { APIProcessThreads, "CreateProcessW", (PROC)MyCreateProcessW, NULL, NULL }, { APIProcessEnvironment, "GetEnvironmentVariableA", (PROC)MyGetEnvironmentVariableA, NULL, NULL }, { APIProcessEnvironment, "GetEnvironmentVariableW", (PROC)MyGetEnvironmentVariableW, NULL, NULL }, { APILibraryLoader, "LoadLibraryA", (PROC)MyLoadLibraryA, NULL, NULL }, { APILibraryLoader, "LoadLibraryW", (PROC)MyLoadLibraryW, NULL, NULL }, { APILibraryLoader, "LoadLibraryExA", (PROC)MyLoadLibraryExA, NULL, NULL }, { APILibraryLoader, "LoadLibraryExW", (PROC)MyLoadLibraryExW, NULL, NULL }, { APIConsole, "WriteConsoleA", (PROC)MyWriteConsoleA, NULL, NULL }, { APIConsole, "WriteConsoleW", (PROC)MyWriteConsoleW, NULL, NULL }, { APIFile, "WriteFile", (PROC)MyWriteFile, NULL, NULL }, { NULL, NULL, NULL, NULL } }; //----------------------------------------------------------------------------- // OriginalAttr() // Determine the original attributes for use by \e[m. //----------------------------------------------------------------------------- void OriginalAttr( void ) { static const char attr2ansi[8] = // map console attribute to ANSI number { 0, 4, 2, 6, 1, 5, 3, 7 }; HANDLE hConOut; CONSOLE_SCREEN_BUFFER_INFO csbi; hConOut = CreateFile( L"CONOUT$", GENERIC_READ | GENERIC_WRITE, FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING, 0, 0 ); if (!GetConsoleScreenBufferInfo( hConOut, &csbi )) csbi.wAttributes = 7; CloseHandle( hConOut ); foreground = org_fg = attr2ansi[csbi.wAttributes & 7]; background = org_bg = attr2ansi[(csbi.wAttributes >> 4) & 7]; bold = org_bold = csbi.wAttributes & FOREGROUND_INTENSITY; underline = org_ul = csbi.wAttributes & BACKGROUND_INTENSITY; set_ansicon( &csbi ); } //----------------------------------------------------------------------------- // DllMain() // Function called by the system when processes and threads are initialized // and terminated. //----------------------------------------------------------------------------- __declspec(dllexport) // to stop MinGW exporting everything BOOL WINAPI DllMain( HINSTANCE hInstance, DWORD dwReason, LPVOID lpReserved ) { BOOL bResult = TRUE; HMODULE api; PHookFn hook; #if (MYDEBUG > 1) _snprintf( tempfile, MAX_PATH, "%s\\ansicon.log", getenv( "TEMP" ) ); #endif if (dwReason == DLL_PROCESS_ATTACH) { #if (MYDEBUG > 1) DeleteFileA( tempfile ); #endif hDllInstance = hInstance; // save Dll instance handle DEBUGSTR( L"hDllInstance = %p", hDllInstance ); // Get the entry points to the original functions. hKernel = GetModuleHandleA( APIKernel ); for (hook = Hooks; hook->name; ++hook) { hook->oldfunc = GetProcAddress( hKernel, hook->name ); api = GetModuleHandleA( hook->lib ); if (api) hook->apifunc = GetProcAddress( api, hook->name ); } bResult = HookAPIAllMod( Hooks, FALSE ); OriginalAttr(); DisableThreadLibraryCalls( hInstance ); } else if (dwReason == DLL_PROCESS_DETACH && lpReserved == NULL) { DEBUGSTR( L"Unloading" ); HookAPIAllMod( Hooks, TRUE ); } return( bResult ); }