ansicon/proctype.c
Jason Hood 40f59c543c Many changes, bad programmer!
Just copying the history from the source:

recognize the standard handle defines in WriteFile;
minor speed improvement by caching GetConsoleMode;
keep track of three handles (ostensibly stdout, stderr and a file);
test a DOS header exists before writing to e_oemid;
more flexible/robust handling of data directories;
files writing to the console will always succeed;
log: use API file functions and a custom printf;
     add a blank line between processes;
     set function name for MyWriteConsoleA;
scan imports from "kernel32" (without extension);
added dynamic environment variable CLICOLOR;
removed _hwrite (it's the same address as _lwrite);
join multibyte characters split across separate writes;
remove wcstok, avoiding potential interference with the host;
similarly, use a private heap instead of malloc.
2017-07-25 18:18:34 +10:00

157 lines
4.7 KiB
C

/*
Test for a valid process (i386 for x86; that or AMD64 for x64). We can get
that info from the image header, which means getting the process's base
address (which we need anyway, to modify the imports). The simplest way to
do that is to enumerate the pages, looking for an executable image. A .NET
AnyCPU process has a 32-bit structure, but will load as 64-bit when possible.
The 64-bit version (both DLLs) will say this is type 48 (halfway between 32 &
64); the 32-bit version will ignore it if run on a 64-bit OS.
*/
#include "ansicon.h"
#if !defined(_WIN64) && !defined(W32ON64)
static BOOL ProcessIs64( HANDLE hProcess )
{
BOOL wow;
typedef BOOL (WINAPI *LPFN_ISWOW64PROCESS)( HANDLE, PBOOL );
static LPFN_ISWOW64PROCESS fnIsWow64Process;
if (fnIsWow64Process == INVALID_HANDLE_VALUE)
return FALSE;
if (fnIsWow64Process == NULL)
{
fnIsWow64Process = (LPFN_ISWOW64PROCESS)GetProcAddress(
GetModuleHandle( L"kernel32.dll" ), "IsWow64Process" );
if (fnIsWow64Process == NULL)
{
fnIsWow64Process = INVALID_HANDLE_VALUE;
return FALSE;
}
}
// If IsWow64Process fails, say it is 64, since injection probably wouldn't
// work, either.
return !(fnIsWow64Process( hProcess, &wow ) && wow);
}
#endif
int ProcessType( LPPROCESS_INFORMATION ppi, PBYTE* pBase, BOOL* gui )
{
PBYTE ptr;
MEMORY_BASIC_INFORMATION minfo;
IMAGE_DOS_HEADER dos_header;
IMAGE_NT_HEADERS nt_header;
*pBase = NULL;
*gui = FALSE;
for (ptr = NULL;
VirtualQueryEx( ppi->hProcess, ptr, &minfo, sizeof(minfo) );
ptr += minfo.RegionSize)
{
if (minfo.BaseAddress == minfo.AllocationBase
&& ReadProcVar( minfo.BaseAddress, &dos_header )
&& dos_header.e_magic == IMAGE_DOS_SIGNATURE
&& ReadProcVar( (PBYTE)minfo.BaseAddress + dos_header.e_lfanew,
&nt_header )
&& nt_header.Signature == IMAGE_NT_SIGNATURE
&& !(nt_header.FileHeader.Characteristics & IMAGE_FILE_DLL))
{
// Don't load into ansicon.exe, it wants to do that itself.
if (nt_header.OptionalHeader.MajorImageVersion == 20033 &&
nt_header.OptionalHeader.MinorImageVersion == 18771)
return -1;
*pBase = minfo.BaseAddress;
if (nt_header.OptionalHeader.Subsystem == IMAGE_SUBSYSTEM_WINDOWS_GUI)
*gui = TRUE;
if (*gui ||
nt_header.OptionalHeader.Subsystem == IMAGE_SUBSYSTEM_WINDOWS_CUI)
{
if (nt_header.FileHeader.Machine == IMAGE_FILE_MACHINE_I386)
{
PIMAGE_NT_HEADERS32 pNTHeader = (PIMAGE_NT_HEADERS32)&nt_header;
if (pNTHeader->DATADIRS > IMAGE_DIRECTORY_ENTRY_COM_DESCRIPTOR &&
pNTHeader->COMDIR.VirtualAddress != 0)
{
IMAGE_COR20_HEADER ComHeader, *pComHeader;
pComHeader = (PIMAGE_COR20_HEADER)((PBYTE)minfo.BaseAddress
+ pNTHeader->COMDIR.VirtualAddress);
ReadProcVar( pComHeader, &ComHeader );
if ((ComHeader.Flags & COMIMAGE_FLAGS_ILONLY) &&
!(ComHeader.Flags & COMIMAGE_FLAGS_32BITREQUIRED))
{
#if defined(_WIN64) || !defined(W32ON64) // W32ON64 will log due to -P
DEBUGSTR( 1, " AnyCPU %s (base = %q)",
(*gui) ? "GUI" : "console", minfo.BaseAddress );
#endif
#if defined(_WIN64) || defined(W32ON64)
return 48;
#else
if (ProcessIs64( ppi->hProcess ))
{
DEBUGSTR( 1, " Unsupported (use x64\\ansicon)" );
return 0;
}
return 32;
#endif
}
}
DEBUGSTR( 1, " 32-bit %s (base = %q)",
(*gui) ? "GUI" : "console", minfo.BaseAddress );
return 32;
}
if (nt_header.FileHeader.Machine == IMAGE_FILE_MACHINE_AMD64)
{
#ifdef _WIN64
DEBUGSTR( 1, " 64-bit %s (base = %p)",
(*gui) ? "GUI" : "console", minfo.BaseAddress );
return 64;
#elif defined(W32ON64)
// Console will log due to -P, but GUI may be ignored (if not,
// this'll show up twice).
if (*gui)
DEBUGSTR( 1, " 64-bit GUI (base = %P)", minfo.BaseAddress );
return 64;
#else
DEBUGSTR( 1, " 64-bit %s (base = %P)",
(*gui) ? "GUI" : "console", minfo.BaseAddress );
DEBUGSTR( 1, " Unsupported (use x64\\ansicon)" );
return 0;
#endif
}
DEBUGSTR( 1, " Ignoring unsupported machine (0x%X)",
nt_header.FileHeader.Machine );
}
else
{
DEBUGSTR( 1, " Ignoring unsupported subsystem (%u)",
nt_header.OptionalHeader.Subsystem );
}
return 0;
}
#ifndef _WIN64
// If a 32-bit process loads a 64-bit one, we may miss the base
// address. If the pointer overflows, assume 64-bit.
if (((DWORD)ptr >> 12) + ((DWORD)minfo.RegionSize >> 12) >= 0x100000)
{
#ifdef W32ON64
DEBUGSTR( 1, " Pointer overflow: assuming 64-bit" );
return 64;
#else
DEBUGSTR( 1, " Ignoring apparent 64-bit process (use x64\\ansicon)" );
return 0;
#endif
}
#endif
}
DEBUGSTR( 1, " Ignoring non-Windows process" );
return 0;
}