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834 lines
22 KiB
834 lines
22 KiB
//////////////////////////////////////////////////////////////////////////////
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//
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// Module: detours.lib
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// File: detours.cpp
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// Author: Galen Hunt
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//
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// Detours for binary functions. Version 1.2. (Build 35)
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//
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// Copyright 1995-1999, Microsoft Corporation
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//
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// http://research.microsoft.com/sn/detours
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//
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//#include <ole2.h>
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#include "stdafx.h"
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#include <imagehlp.h>
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//////////////////////////////////////////////////////////////////////////////
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//
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enum {
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OP_JMP_DS = 0x25,
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OP_JA = 0x77,
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OP_NOP = 0x90,
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OP_CALL = 0xe8,
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OP_JMP = 0xe9,
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OP_PREFIX = 0xff,
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OP_MOV_EAX = 0xa1,
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OP_SET_EAX = 0xb8,
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OP_JMP_EAX = 0xe0,
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OP_RET_POP = 0xc2,
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OP_RET = 0xc3,
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OP_BRK = 0xcc,
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SIZE_OF_JMP = 5,
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SIZE_OF_NOP = 1,
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SIZE_OF_BRK = 1,
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SIZE_OF_TRP_OPS = SIZE_OF_JMP /* + SIZE_OF_BRK */,
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};
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class CEnableWriteOnCodePage
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{
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public:
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CEnableWriteOnCodePage(PBYTE pbCode, LONG cbCode = DETOUR_TRAMPOLINE_SIZE)
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{
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m_pbCode = pbCode;
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m_cbCode = cbCode;
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m_dwOldPerm = 0;
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m_hProcess = GetCurrentProcess();
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if (m_pbCode && m_cbCode) {
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if (!FlushInstructionCache(m_hProcess, pbCode, cbCode)) {
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return;
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}
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if (!VirtualProtect(pbCode,
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cbCode,
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PAGE_EXECUTE_READWRITE,
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&m_dwOldPerm)) {
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return;
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}
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}
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}
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~CEnableWriteOnCodePage()
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{
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if (m_dwOldPerm && m_pbCode && m_cbCode) {
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DWORD dwTemp = 0;
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if (!FlushInstructionCache(m_hProcess, m_pbCode, m_cbCode)) {
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return;
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}
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if (!VirtualProtect(m_pbCode, m_cbCode, m_dwOldPerm, &dwTemp)) {
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return;
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}
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}
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}
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BOOL SetPermission(DWORD dwPerms)
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{
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if (m_dwOldPerm && m_pbCode && m_cbCode) {
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m_dwOldPerm = dwPerms;
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return TRUE;
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}
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return FALSE;
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}
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BOOL IsValid(VOID)
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{
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return m_pbCode && m_cbCode && m_dwOldPerm;
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}
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private:
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HANDLE m_hProcess;
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PBYTE m_pbCode;
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LONG m_cbCode;
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DWORD m_dwOldPerm;
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};
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//////////////////////////////////////////////////////////////////////////////
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//
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static BOOL detour_insert_jump(PBYTE pbCode, PBYTE pbDest, LONG cbCode)
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{
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if (cbCode < SIZE_OF_JMP)
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return FALSE;
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*pbCode++ = OP_JMP;
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LONG offset = (LONG)pbDest - (LONG)(pbCode + 4);
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*((PDWORD&)pbCode)++ = offset;
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for (cbCode -= SIZE_OF_JMP; cbCode > 0; cbCode--)
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*pbCode++ = OP_BRK;
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return TRUE;
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}
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static BOOL detour_insert_detour(PBYTE pbTarget,
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PBYTE pbTrampoline,
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PBYTE pbDetour)
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{
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if (pbTarget[0] == OP_NOP)
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return FALSE;
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if (pbTarget[0] == OP_JMP) // Already has a detour.
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return FALSE;
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PBYTE pbCont = pbTarget;
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for (LONG cbTarget = 0; cbTarget < SIZE_OF_TRP_OPS;) {
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BYTE bOp = *pbCont;
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pbCont = DetourCopyInstruction(NULL, pbCont, NULL);
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cbTarget = pbCont - pbTarget;
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if (bOp == OP_JMP ||
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bOp == OP_JMP_DS ||
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bOp == OP_JMP_EAX ||
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bOp == OP_RET_POP ||
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bOp == OP_RET) {
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break;
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}
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}
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if (cbTarget < SIZE_OF_TRP_OPS) {
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// Too few instructions.
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return FALSE;
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}
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if (cbTarget > (DETOUR_TRAMPOLINE_SIZE - SIZE_OF_JMP - SIZE_OF_NOP - 1)) {
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// Too many instructions.
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return FALSE;
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}
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//////////////////////////////////////////////////////// Finalize Reroute.
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//
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CEnableWriteOnCodePage ewTrampoline(pbTrampoline, DETOUR_TRAMPOLINE_SIZE);
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CEnableWriteOnCodePage ewTarget(pbTarget, cbTarget);
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if (!ewTrampoline.SetPermission(PAGE_EXECUTE_READWRITE))
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return FALSE;
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if (!ewTarget.IsValid())
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return FALSE;
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pbTrampoline[0] = OP_NOP;
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PBYTE pbSrc = pbTarget;
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PBYTE pbDst = pbTrampoline + SIZE_OF_NOP;
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for (LONG cbCopy = 0; cbCopy < cbTarget;) {
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pbSrc = DetourCopyInstruction(pbDst, pbSrc, NULL);
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cbCopy = pbSrc - pbTarget;
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pbDst = pbTrampoline + SIZE_OF_NOP + cbCopy;
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}
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if (cbCopy != cbTarget) // Count came out different!
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return FALSE;
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pbCont = pbTarget + cbTarget;
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if (!detour_insert_jump(pbTrampoline + 1 + cbTarget, pbCont, SIZE_OF_JMP))
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return FALSE;
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pbTrampoline[DETOUR_TRAMPOLINE_SIZE-1] = (BYTE)cbTarget;
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if (!detour_insert_jump(pbTarget, pbDetour, cbTarget))
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return FALSE;
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return TRUE;
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}
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//////////////////////////////////////////////////////////////////////////////
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//
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BOOL WINAPI DetourRemoveWithTrampoline(PBYTE pbTrampoline,
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PBYTE pbDetour)
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{
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pbTrampoline = DetourFindFinalCode(pbTrampoline);
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pbDetour = DetourFindFinalCode(pbDetour);
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////////////////////////////////////// Verify that Trampoline is in place.
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//
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if (pbTrampoline[0] != OP_NOP) {
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SetLastError(ERROR_INVALID_HANDLE);
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return FALSE;
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}
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LONG cbTarget = pbTrampoline[DETOUR_TRAMPOLINE_SIZE-1];
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if (cbTarget == 0 || cbTarget >= DETOUR_TRAMPOLINE_SIZE - 1) {
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SetLastError(ERROR_INVALID_HANDLE);
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return FALSE;
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}
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if (pbTrampoline[cbTarget + SIZE_OF_NOP] != OP_JMP) {
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SetLastError(ERROR_INVALID_HANDLE);
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return FALSE;
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}
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LONG offset = *((PDWORD)&pbTrampoline[cbTarget + SIZE_OF_NOP + 1]);
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PBYTE pbTarget = pbTrampoline +
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SIZE_OF_NOP + cbTarget + SIZE_OF_JMP + offset - cbTarget;
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if (pbTarget[0] != OP_JMP) { // Missing detour.
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SetLastError(ERROR_INVALID_BLOCK);
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return FALSE;
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}
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offset = *((PDWORD)&pbTarget[1]);
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PBYTE pbTargetDetour = pbTarget + SIZE_OF_JMP + offset;
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if (pbTargetDetour != pbDetour) {
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SetLastError(ERROR_INVALID_ACCESS);
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return FALSE;
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}
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/////////////////////////////////////////////////////// Remove the Detour.
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CEnableWriteOnCodePage ewTarget(pbTarget, cbTarget);
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PBYTE pbSrc = pbTrampoline + SIZE_OF_NOP;
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PBYTE pbDst = pbTarget;
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for (LONG cbCopy = 0; cbCopy < cbTarget; pbDst = pbTarget + cbCopy) {
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pbSrc = DetourCopyInstruction(pbDst, pbSrc, NULL);
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cbCopy = pbSrc - (pbTrampoline + SIZE_OF_NOP);
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}
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if (cbCopy != cbTarget) { // Count came out different!
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SetLastError(ERROR_INVALID_DATA);
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return FALSE;
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}
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return TRUE;
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}
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PBYTE WINAPI DetourFunction(PBYTE pbTarget,
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PBYTE pbDetour)
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{
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PBYTE pbTrampoline = new BYTE [DETOUR_TRAMPOLINE_SIZE];
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if (pbTrampoline == NULL)
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return NULL;
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pbTarget = DetourFindFinalCode(pbTarget);
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pbDetour = DetourFindFinalCode(pbDetour);
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if (detour_insert_detour(pbTarget, pbTrampoline, pbDetour))
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return pbTrampoline;
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delete[] pbTrampoline;
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return NULL;
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}
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BOOL WINAPI DetourFunctionWithEmptyTrampoline(PBYTE pbTrampoline,
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PBYTE pbTarget,
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PBYTE pbDetour)
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{
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return DetourFunctionWithEmptyTrampolineEx(pbTrampoline, pbTarget, pbDetour,
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NULL, NULL, NULL);
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}
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BOOL WINAPI DetourFunctionWithEmptyTrampolineEx(PBYTE pbTrampoline,
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PBYTE pbTarget,
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PBYTE pbDetour,
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PBYTE *ppbRealTrampoline,
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PBYTE *ppbRealTarget,
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PBYTE *ppbRealDetour)
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{
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pbTrampoline = DetourFindFinalCode(pbTrampoline);
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pbTarget = DetourFindFinalCode(pbTarget);
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pbDetour = DetourFindFinalCode(pbDetour);
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if (ppbRealTrampoline)
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*ppbRealTrampoline = pbTrampoline;
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if (ppbRealTarget)
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*ppbRealTarget = pbTarget;
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if (ppbRealDetour)
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*ppbRealDetour = pbDetour;
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if (pbTrampoline == NULL || pbDetour == NULL || pbTarget == NULL)
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return FALSE;
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if (pbTrampoline[0] == OP_NOP && pbTrampoline[1] != OP_NOP) {
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// Already Patched.
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return 2;
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}
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if (pbTrampoline[0] != OP_NOP ||
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pbTrampoline[1] != OP_NOP) {
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return FALSE;
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}
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return detour_insert_detour(pbTarget, pbTrampoline, pbDetour);
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}
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BOOL WINAPI DetourFunctionWithTrampoline(PBYTE pbTrampoline,
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PBYTE pbDetour)
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{
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return DetourFunctionWithTrampolineEx(pbTrampoline, pbDetour, NULL, NULL);
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}
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BOOL WINAPI DetourFunctionWithTrampolineEx(PBYTE pbTrampoline,
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PBYTE pbDetour,
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PBYTE *ppbRealTrampoline,
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PBYTE *ppbRealTarget)
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{
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PBYTE pbTarget = NULL;
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pbTrampoline = DetourFindFinalCode(pbTrampoline);
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pbDetour = DetourFindFinalCode(pbDetour);
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if (ppbRealTrampoline)
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*ppbRealTrampoline = pbTrampoline;
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if (ppbRealTarget)
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*ppbRealTarget = NULL;
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if (pbTrampoline == NULL || pbDetour == NULL)
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return FALSE;
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if (pbTrampoline[0] == OP_NOP && pbTrampoline[1] != OP_NOP) {
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// Already Patched.
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return 2;
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}
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if (pbTrampoline[0] != OP_NOP ||
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pbTrampoline[1] != OP_NOP ||
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pbTrampoline[2] != OP_CALL ||
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pbTrampoline[7] != OP_PREFIX ||
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pbTrampoline[8] != OP_JMP_EAX) {
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return FALSE;
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}
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PVOID (__fastcall * pfAddr)(VOID);
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pfAddr = (PVOID (__fastcall *)(VOID))(pbTrampoline +
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SIZE_OF_NOP + SIZE_OF_NOP + SIZE_OF_JMP +
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*(LONG *)&pbTrampoline[3]);
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pbTarget = DetourFindFinalCode((PBYTE)(*pfAddr)());
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if (ppbRealTarget)
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*ppbRealTarget = pbTarget;
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return detour_insert_detour(pbTarget, pbTrampoline, pbDetour);
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}
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//////////////////////////////////////////////////////////////////////////////
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//////////////////////////////////////////////////////////////////////////////
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//////////////////////////////////////////////////////////////////////////////
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//////////////////////////////////////////////////////////////////////////////
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//
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//////////////////////////////////////////////////////////////////////////////
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//
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typedef LPAPI_VERSION (NTAPI *PF_ImagehlpApiVersionEx)(LPAPI_VERSION AppVersion);
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typedef BOOL (NTAPI *PF_SymInitialize)(IN HANDLE hProcess,
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IN LPSTR UserSearchPath,
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IN BOOL fInvadeProcess);
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typedef DWORD (NTAPI *PF_SymSetOptions)(IN DWORD SymOptions);
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typedef DWORD (NTAPI *PF_SymGetOptions)(VOID);
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typedef BOOL (NTAPI *PF_SymLoadModule)(IN HANDLE hProcess,
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IN HANDLE hFile,
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IN PSTR ImageName,
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IN PSTR ModuleName,
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IN DWORD BaseOfDll,
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IN DWORD SizeOfDll);
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typedef BOOL (NTAPI *PF_SymGetModuleInfo)(IN HANDLE hProcess,
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IN DWORD dwAddr,
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OUT PIMAGEHLP_MODULE ModuleInfo);
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typedef BOOL (NTAPI *PF_SymGetSymFromName)(IN HANDLE hProcess,
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IN LPSTR Name,
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OUT PIMAGEHLP_SYMBOL Symbol);
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typedef BOOL (NTAPI *PF_BindImage)(IN LPSTR pszImageName,
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IN LPSTR pszDllPath,
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IN LPSTR pszSymbolPath);
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static HANDLE s_hProcess = NULL;
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static HINSTANCE s_hImageHlp = NULL;
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static PF_ImagehlpApiVersionEx s_pfImagehlpApiVersionEx = NULL;
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static PF_SymInitialize s_pfSymInitialize = NULL;
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static PF_SymSetOptions s_pfSymSetOptions = NULL;
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static PF_SymGetOptions s_pfSymGetOptions = NULL;
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static PF_SymLoadModule s_pfSymLoadModule = NULL;
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static PF_SymGetModuleInfo s_pfSymGetModuleInfo = NULL;
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static PF_SymGetSymFromName s_pfSymGetSymFromName = NULL;
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static PF_BindImage s_pfBindImage = NULL;
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static BOOL LoadImageHlp(VOID)
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{
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if (s_hImageHlp)
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return TRUE;
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if (s_hProcess == NULL) {
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s_hProcess = GetCurrentProcess();
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s_hImageHlp = LoadLibraryA("imagehlp.dll");
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if (s_hImageHlp == NULL)
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return FALSE;
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s_pfImagehlpApiVersionEx
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= (PF_ImagehlpApiVersionEx)GetProcAddress(s_hImageHlp,
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"ImagehlpApiVersionEx");
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s_pfSymInitialize
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= (PF_SymInitialize)GetProcAddress(s_hImageHlp, "SymInitialize");
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s_pfSymSetOptions
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= (PF_SymSetOptions)GetProcAddress(s_hImageHlp, "SymSetOptions");
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s_pfSymGetOptions
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= (PF_SymGetOptions)GetProcAddress(s_hImageHlp, "SymGetOptions");
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s_pfSymLoadModule
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= (PF_SymLoadModule)GetProcAddress(s_hImageHlp, "SymLoadModule");
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s_pfSymGetModuleInfo
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= (PF_SymGetModuleInfo)GetProcAddress(s_hImageHlp, "SymGetModuleInfo");
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s_pfSymGetSymFromName
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= (PF_SymGetSymFromName)GetProcAddress(s_hImageHlp, "SymGetSymFromName");
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s_pfBindImage
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= (PF_BindImage)GetProcAddress(s_hImageHlp, "BindImage");
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API_VERSION av;
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ZeroMemory(&av, sizeof(av));
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av.MajorVersion = API_VERSION_NUMBER;
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if (s_pfImagehlpApiVersionEx) {
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(*s_pfImagehlpApiVersionEx)(&av);
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}
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if (s_pfImagehlpApiVersionEx == NULL || av.MajorVersion < API_VERSION_NUMBER) {
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FreeLibrary(s_hImageHlp);
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s_hImageHlp = NULL;
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return FALSE;
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}
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if (s_pfSymInitialize) {
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(*s_pfSymInitialize)(s_hProcess, NULL, FALSE);
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}
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if (s_pfSymGetOptions && s_pfSymSetOptions) {
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DWORD dw = (*s_pfSymGetOptions)();
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dw &= (SYMOPT_CASE_INSENSITIVE | SYMOPT_UNDNAME | SYMOPT_DEFERRED_LOADS);
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(*s_pfSymSetOptions)(dw);
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}
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return TRUE;
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}
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return FALSE;
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}
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//////////////////////////////////////////////////////////////////////////////
|
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//
|
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PBYTE WINAPI DetourFindFinalCode(PBYTE pbCode)
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{
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if (pbCode == NULL)
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return NULL;
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//BUGBUG PBYTE pbTemp = pbCode;
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if (pbCode[0] == OP_JMP) { // Reference passed.
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pbCode = pbCode + SIZE_OF_JMP + *(LONG *)&pbCode[1];
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}
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else if (pbCode[0] == OP_PREFIX && pbCode[1] == OP_JMP_DS) {
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pbCode = *(PBYTE *)&pbCode[2];
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pbCode = *(PBYTE *)pbCode;
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}
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return pbCode;
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}
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PBYTE WINAPI DetourFindFunction(PCHAR pszModule, PCHAR pszFunction)
|
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{
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/////////////////////////////////////////////// First, Try GetProcAddress.
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//
|
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HINSTANCE hInst = LoadLibraryA(pszModule);
|
|
if (hInst == NULL) {
|
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return NULL;
|
|
}
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PBYTE pbCode = (PBYTE)GetProcAddress(hInst, pszFunction);
|
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if (pbCode) {
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return pbCode;
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}
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////////////////////////////////////////////////////// Then Try ImageHelp.
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//
|
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if (!LoadImageHlp() ||
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s_pfSymLoadModule == NULL ||
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s_pfSymGetModuleInfo == NULL ||
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s_pfSymGetSymFromName == NULL) {
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return NULL;
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}
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(*s_pfSymLoadModule)(s_hProcess, NULL, pszModule, NULL, (DWORD)hInst, 0);
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IMAGEHLP_MODULE modinfo;
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ZeroMemory(&modinfo, sizeof(modinfo));
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if (!(*s_pfSymGetModuleInfo)(s_hProcess, (DWORD)hInst, &modinfo)) {
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return NULL;
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}
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CHAR szFullName[512];
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strcpy(szFullName, modinfo.ModuleName);
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strcat(szFullName, "!");
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strcat(szFullName, pszFunction);
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//BUGBUG DWORD nDisplacement = 0;
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struct CFullSymbol : IMAGEHLP_SYMBOL {
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CHAR szRestOfName[512];
|
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} symbol;
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|
ZeroMemory(&symbol, sizeof(symbol));
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symbol.SizeOfStruct = sizeof(IMAGEHLP_SYMBOL);
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symbol.MaxNameLength = sizeof(symbol.szRestOfName)/sizeof(0);
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|
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if (!(*s_pfSymGetSymFromName)(s_hProcess, szFullName, &symbol)) {
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return NULL;
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}
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|
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return (PBYTE)symbol.Address;
|
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}
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//////////////////////////////////////////////////// Instance Image Functions.
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//
|
|
HINSTANCE WINAPI DetourEnumerateInstances(HINSTANCE hinstLast)
|
|
{
|
|
PBYTE pbLast;
|
|
|
|
if (hinstLast == NULL) {
|
|
pbLast = (PBYTE)0x10000;
|
|
}
|
|
else {
|
|
pbLast = (PBYTE)hinstLast + 0x10000;
|
|
}
|
|
|
|
MEMORY_BASIC_INFORMATION mbi;
|
|
ZeroMemory(&mbi, sizeof(mbi));
|
|
|
|
for (;; pbLast = (PBYTE)mbi.BaseAddress + mbi.RegionSize) {
|
|
if (VirtualQuery((PVOID)pbLast, &mbi, sizeof(mbi)) <= 0) {
|
|
return NULL;
|
|
}
|
|
|
|
if (mbi.State != MEM_COMMIT)
|
|
continue;
|
|
|
|
__try {
|
|
PIMAGE_DOS_HEADER pDosHeader = (PIMAGE_DOS_HEADER)pbLast;
|
|
if (pDosHeader->e_magic != IMAGE_DOS_SIGNATURE) {
|
|
continue;
|
|
}
|
|
|
|
PIMAGE_NT_HEADERS pNtHeader = (PIMAGE_NT_HEADERS)((PBYTE)pDosHeader +
|
|
pDosHeader->e_lfanew);
|
|
if (pNtHeader->Signature != IMAGE_NT_SIGNATURE) {
|
|
continue;
|
|
}
|
|
|
|
return (HINSTANCE)pDosHeader;
|
|
} __except(EXCEPTION_EXECUTE_HANDLER) {
|
|
/* nothing. */
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
PBYTE WINAPI DetourFindEntryPointForInstance(HINSTANCE hInst)
|
|
{
|
|
PIMAGE_DOS_HEADER pDosHeader = (PIMAGE_DOS_HEADER)hInst;
|
|
if (hInst == NULL) {
|
|
pDosHeader = (PIMAGE_DOS_HEADER)GetModuleHandle(NULL);
|
|
}
|
|
|
|
__try {
|
|
if (pDosHeader->e_magic != IMAGE_DOS_SIGNATURE) {
|
|
SetLastError(ERROR_BAD_EXE_FORMAT);
|
|
return NULL;
|
|
}
|
|
|
|
PIMAGE_NT_HEADERS pNtHeader = (PIMAGE_NT_HEADERS)((PBYTE)pDosHeader +
|
|
pDosHeader->e_lfanew);
|
|
if (pNtHeader->Signature != IMAGE_NT_SIGNATURE) {
|
|
SetLastError(ERROR_INVALID_EXE_SIGNATURE);
|
|
return NULL;
|
|
}
|
|
if (pNtHeader->FileHeader.SizeOfOptionalHeader == 0) {
|
|
SetLastError(ERROR_EXE_MARKED_INVALID);
|
|
return NULL;
|
|
}
|
|
return (PBYTE)pNtHeader->OptionalHeader.AddressOfEntryPoint +
|
|
pNtHeader->OptionalHeader.ImageBase;
|
|
} __except(EXCEPTION_EXECUTE_HANDLER) {
|
|
}
|
|
SetLastError(ERROR_EXE_MARKED_INVALID);
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static inline PBYTE RvaAdjust(HINSTANCE hInst, DWORD raddr)
|
|
{
|
|
if (raddr != NULL) {
|
|
return (PBYTE)hInst + raddr;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
BOOL WINAPI DetourEnumerateExportsForInstance(HINSTANCE hInst,
|
|
PVOID pContext,
|
|
PF_DETOUR_BINARY_EXPORT_CALLBACK pfExport)
|
|
{
|
|
PIMAGE_DOS_HEADER pDosHeader = (PIMAGE_DOS_HEADER)hInst;
|
|
if (hInst == NULL) {
|
|
pDosHeader = (PIMAGE_DOS_HEADER)GetModuleHandle(NULL);
|
|
}
|
|
|
|
__try {
|
|
if (pDosHeader->e_magic != IMAGE_DOS_SIGNATURE) {
|
|
SetLastError(ERROR_BAD_EXE_FORMAT);
|
|
return NULL;
|
|
}
|
|
|
|
PIMAGE_NT_HEADERS pNtHeader = (PIMAGE_NT_HEADERS)((PBYTE)pDosHeader +
|
|
pDosHeader->e_lfanew);
|
|
if (pNtHeader->Signature != IMAGE_NT_SIGNATURE) {
|
|
SetLastError(ERROR_INVALID_EXE_SIGNATURE);
|
|
return FALSE;
|
|
}
|
|
if (pNtHeader->FileHeader.SizeOfOptionalHeader == 0) {
|
|
SetLastError(ERROR_EXE_MARKED_INVALID);
|
|
return FALSE;
|
|
}
|
|
|
|
PIMAGE_EXPORT_DIRECTORY pExportDir
|
|
= (PIMAGE_EXPORT_DIRECTORY)
|
|
RvaAdjust(hInst,
|
|
pNtHeader->OptionalHeader
|
|
.DataDirectory[IMAGE_DIRECTORY_ENTRY_EXPORT].VirtualAddress);
|
|
//BUGBUG ULONG cbExportDir = pNtHeader->OptionalHeader
|
|
//BUGBUG .DataDirectory[IMAGE_DIRECTORY_ENTRY_EXPORT].Size;
|
|
|
|
if (pExportDir == NULL) {
|
|
SetLastError(ERROR_EXE_MARKED_INVALID);
|
|
return FALSE;
|
|
}
|
|
|
|
//BUGBUG PCHAR pszName = (PCHAR)RvaAdjust(hInst, pExportDir->Name);
|
|
PDWORD pdwFunctions = (PDWORD)RvaAdjust(hInst, pExportDir->AddressOfFunctions);
|
|
PDWORD pdwNames = (PDWORD)RvaAdjust(hInst, pExportDir->AddressOfNames);
|
|
PWORD pwOrdinals = (PWORD)RvaAdjust(hInst, pExportDir->AddressOfNameOrdinals);
|
|
|
|
for (DWORD nFunc = 0; nFunc < pExportDir->NumberOfFunctions; nFunc++) {
|
|
PBYTE pbCode = (PBYTE)RvaAdjust(hInst, pdwFunctions[nFunc]);
|
|
PCHAR pszName = (nFunc < pExportDir->NumberOfNames) ?
|
|
(PCHAR)RvaAdjust(hInst, pdwNames[nFunc]) : NULL;
|
|
ULONG nOrdinal = pExportDir->Base + pwOrdinals[nFunc];
|
|
|
|
if (!(*pfExport)(pContext, nOrdinal, pszName, pbCode)) {
|
|
break;
|
|
}
|
|
}
|
|
SetLastError(NO_ERROR);
|
|
return TRUE;
|
|
} __except(EXCEPTION_EXECUTE_HANDLER) {
|
|
}
|
|
SetLastError(ERROR_EXE_MARKED_INVALID);
|
|
return FALSE;
|
|
}
|
|
|
|
PDETOUR_LOADED_BINARY WINAPI DetourBinaryFromInstance(HINSTANCE hInst)
|
|
{
|
|
PIMAGE_DOS_HEADER pDosHeader = (PIMAGE_DOS_HEADER)hInst;
|
|
if (hInst == NULL) {
|
|
pDosHeader = (PIMAGE_DOS_HEADER)GetModuleHandle(NULL);
|
|
}
|
|
|
|
__try {
|
|
if (pDosHeader->e_magic != IMAGE_DOS_SIGNATURE) {
|
|
SetLastError(ERROR_BAD_EXE_FORMAT);
|
|
return NULL;
|
|
}
|
|
|
|
PIMAGE_NT_HEADERS pNtHeader = (PIMAGE_NT_HEADERS)((PBYTE)pDosHeader +
|
|
pDosHeader->e_lfanew);
|
|
if (pNtHeader->Signature != IMAGE_NT_SIGNATURE) {
|
|
SetLastError(ERROR_INVALID_EXE_SIGNATURE);
|
|
return NULL;
|
|
}
|
|
if (pNtHeader->FileHeader.SizeOfOptionalHeader == 0) {
|
|
SetLastError(ERROR_EXE_MARKED_INVALID);
|
|
return NULL;
|
|
}
|
|
|
|
PIMAGE_SECTION_HEADER pSectionHeaders
|
|
= (PIMAGE_SECTION_HEADER)((PBYTE)pNtHeader
|
|
+ sizeof(pNtHeader->Signature)
|
|
+ sizeof(pNtHeader->FileHeader)
|
|
+ pNtHeader->FileHeader.SizeOfOptionalHeader);
|
|
|
|
for (DWORD n = 0; n < pNtHeader->FileHeader.NumberOfSections; n++) {
|
|
if (strcmp((PCHAR)pSectionHeaders[n].Name, ".detour") == 0) {
|
|
if (pSectionHeaders[n].VirtualAddress == 0 ||
|
|
pSectionHeaders[n].SizeOfRawData == 0) {
|
|
|
|
break;
|
|
}
|
|
|
|
PBYTE pbData = (PBYTE)pDosHeader + pSectionHeaders[n].VirtualAddress;
|
|
DETOUR_SECTION_HEADER *pHeader = (DETOUR_SECTION_HEADER *)pbData;
|
|
if (pHeader->cbHeaderSize < sizeof(DETOUR_SECTION_HEADER) ||
|
|
pHeader->nSignature != DETOUR_SECTION_HEADER_SIGNATURE) {
|
|
|
|
break;
|
|
}
|
|
|
|
if (pHeader->nDataOffset == 0) {
|
|
pHeader->nDataOffset = pHeader->cbHeaderSize;
|
|
}
|
|
return (PBYTE)pHeader;
|
|
}
|
|
}
|
|
} __except(EXCEPTION_EXECUTE_HANDLER) {
|
|
}
|
|
SetLastError(ERROR_EXE_MARKED_INVALID);
|
|
|
|
return NULL;
|
|
}
|
|
|
|
DWORD WINAPI DetourGetSizeOfBinary(PDETOUR_LOADED_BINARY pBinary)
|
|
{
|
|
__try {
|
|
DETOUR_SECTION_HEADER *pHeader = (DETOUR_SECTION_HEADER *)pBinary;
|
|
if (pHeader->cbHeaderSize < sizeof(DETOUR_SECTION_HEADER) ||
|
|
pHeader->nSignature != DETOUR_SECTION_HEADER_SIGNATURE) {
|
|
|
|
SetLastError(ERROR_INVALID_HANDLE);
|
|
return 0;
|
|
}
|
|
return pHeader->cbDataSize;
|
|
} __except(EXCEPTION_EXECUTE_HANDLER) {
|
|
SetLastError(ERROR_INVALID_HANDLE);
|
|
return 0;
|
|
}
|
|
SetLastError(ERROR_INVALID_HANDLE);
|
|
return 0;
|
|
}
|
|
|
|
PBYTE WINAPI DetourFindPayloadInBinary(PDETOUR_LOADED_BINARY pBinary,
|
|
REFGUID rguid,
|
|
DWORD * pcbData)
|
|
{
|
|
PBYTE pbData = NULL;
|
|
//BUGBUG DWORD cbData = 0;
|
|
if (pcbData) {
|
|
*pcbData = 0;
|
|
}
|
|
|
|
if (pBinary == NULL) {
|
|
pBinary = DetourBinaryFromInstance(NULL);
|
|
}
|
|
|
|
__try {
|
|
DETOUR_SECTION_HEADER *pHeader = (DETOUR_SECTION_HEADER *)pBinary;
|
|
if (pHeader->cbHeaderSize < sizeof(DETOUR_SECTION_HEADER) ||
|
|
pHeader->nSignature != DETOUR_SECTION_HEADER_SIGNATURE) {
|
|
|
|
SetLastError(ERROR_INVALID_EXE_SIGNATURE);
|
|
return NULL;
|
|
}
|
|
|
|
PBYTE pbBeg = ((PBYTE)pHeader) + pHeader->nDataOffset;
|
|
PBYTE pbEnd = ((PBYTE)pHeader) + pHeader->cbDataSize;
|
|
|
|
for (pbData = pbBeg; pbData < pbEnd;) {
|
|
DETOUR_SECTION_RECORD *pSection = (DETOUR_SECTION_RECORD *)pbData;
|
|
|
|
if (pSection->guid == rguid) {
|
|
if (pcbData) {
|
|
*pcbData = pSection->cbBytes - sizeof(*pSection);
|
|
return (PBYTE)(pSection + 1);
|
|
}
|
|
|
|
}
|
|
|
|
pbData = (PBYTE)pSection + pSection->cbBytes;
|
|
}
|
|
} __except(EXCEPTION_EXECUTE_HANDLER) {
|
|
SetLastError(ERROR_INVALID_HANDLE);
|
|
return NULL;
|
|
}
|
|
SetLastError(ERROR_INVALID_HANDLE);
|
|
return NULL;
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
BOOL WINAPI DetourBinaryBindA(PCHAR pszFile, PCHAR pszDll, PCHAR pszPath)
|
|
{
|
|
if (!LoadImageHlp()) {
|
|
SetLastError(ERROR_MOD_NOT_FOUND);
|
|
return FALSE;
|
|
}
|
|
if (s_pfBindImage) {
|
|
return (*s_pfBindImage)(pszFile, pszDll ? pszDll : ".", pszPath ? pszPath : ".");
|
|
}
|
|
SetLastError(ERROR_INVALID_FUNCTION);
|
|
return FALSE;
|
|
}
|
|
|
|
static void UnicodeToOem(PWCHAR pwzIn, PCHAR pszOut, INT cbOut)
|
|
{
|
|
cbOut = WideCharToMultiByte(CP_OEMCP, 0,
|
|
pwzIn, lstrlenW(pwzIn),
|
|
pszOut, cbOut-1,
|
|
NULL, NULL);
|
|
pszOut[cbOut] = '\0';
|
|
}
|
|
|
|
BOOL WINAPI DetourBinaryBindW(PWCHAR pwzFile, PWCHAR pwzDll, PWCHAR pwzPath)
|
|
{
|
|
if (!LoadImageHlp()) {
|
|
SetLastError(ERROR_MOD_NOT_FOUND);
|
|
return FALSE;
|
|
}
|
|
|
|
CHAR szFile[MAX_PATH];
|
|
CHAR szDll[MAX_PATH];
|
|
CHAR szPath[MAX_PATH];
|
|
|
|
UnicodeToOem(pwzFile, szFile, sizeof(szFile));
|
|
UnicodeToOem(pwzDll, szDll, sizeof(szDll));
|
|
UnicodeToOem(pwzPath, szPath, sizeof(szPath));
|
|
|
|
if (s_pfBindImage) {
|
|
return (s_pfBindImage)(szFile, szDll, szPath);
|
|
}
|
|
SetLastError(ERROR_INVALID_FUNCTION);
|
|
return FALSE;
|
|
}
|
|
|
|
// End of File
|