mirror of
https://github.com/HIllya51/LunaHook.git
synced 2024-11-24 22:35:36 +08:00
581 lines
16 KiB
C++
581 lines
16 KiB
C++
// util/util.cc
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// 8/23/2013 jichi
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// Branch: ITH_Engine/engine.cpp, revision 133
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// See: http://ja.wikipedia.org/wiki/プロジェクト:美少女ゲーム系/ゲームエンジン
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#include "util/util.h"
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#include "ithsys/ithsys.h"
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#include "main.h"
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#include <Psapi.h>
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namespace { // unnamed
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// jichi 4/19/2014: Return the integer that can mask the signature
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// Artikash 8/4/2018: change implementation
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DWORD SigMask(DWORD sig)
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{
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DWORD count = 0;
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while (sig)
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{
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sig >>= 8;
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++count;
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}
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count -= 4;
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count = -count;
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return 0xffffffff >> (count << 3);
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}
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uint64_t SafeSearchMemory(uint64_t startAddr, uint64_t endAddr, const BYTE* bytes, short length)
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{
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__try
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{
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for (int i = 0; i < endAddr - startAddr - length; ++i)
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for (int j = 0; j <= length; ++j)
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if (j == length) return startAddr + i; // not sure about this algorithm...
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else if (*((BYTE*)startAddr + i + j) != *(bytes + j) && *(bytes + j) != XX) break;
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}
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__except (EXCEPTION_EXECUTE_HANDLER)
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{
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ConsoleOutput("SearchMemory ERROR");
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}
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return 0;
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}
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} // namespace unnamed
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namespace Util
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{
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#ifndef _WIN64
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// jichi 8/24/2013: binary search?
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DWORD GetCodeRange(DWORD hModule,DWORD *low, DWORD *high)
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{
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IMAGE_DOS_HEADER *DosHdr;
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IMAGE_NT_HEADERS *NtHdr;
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DWORD dwReadAddr;
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IMAGE_SECTION_HEADER *shdr;
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DosHdr = (IMAGE_DOS_HEADER *)hModule;
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if (IMAGE_DOS_SIGNATURE == DosHdr->e_magic) {
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dwReadAddr = hModule + DosHdr->e_lfanew;
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NtHdr = (IMAGE_NT_HEADERS *)dwReadAddr;
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if (IMAGE_NT_SIGNATURE == NtHdr->Signature) {
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shdr = (PIMAGE_SECTION_HEADER)((DWORD)(&NtHdr->OptionalHeader) + NtHdr->FileHeader.SizeOfOptionalHeader);
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while ((shdr->Characteristics & IMAGE_SCN_CNT_CODE) == 0)
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shdr++;
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*low = hModule + shdr->VirtualAddress;
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*high = *low + (shdr->Misc.VirtualSize & 0xfffff000) + 0x1000;
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}
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}
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return 0;
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}
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DWORD FindCallAndEntryBoth(DWORD fun, DWORD size, DWORD pt, DWORD sig)
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{
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//WCHAR str[0x40];
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enum { reverse_length = 0x800 };
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DWORD t, l;
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DWORD mask = SigMask(sig);
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bool flag2;
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for (DWORD i = 0x1000; i < size-4; i++) {
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bool flag1 = false;
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if (*(BYTE *)(pt + i) == 0xe8) {
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flag1 = flag2 = true;
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t = *(DWORD *)(pt + i + 1);
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} else if (*(WORD *)(pt + i) == 0x15ff) {
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flag1 = true;
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flag2 = false;
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t = *(DWORD *)(pt + i + 2);
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}
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if (flag1) {
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if (flag2) {
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flag1 = (pt + i + 5 + t == fun);
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l = 5;
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} else if (t >= pt && t <= pt + size - 4) {
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flag1 = fun == *(DWORD *)t;
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l = 6;
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} else
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flag1 = false;
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if (flag1)
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//swprintf(str,L"CALL addr: 0x%.8X",pt + i);
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//OutputConsole(str);
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for (DWORD j = i; j > i - reverse_length; j--)
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if ((*(WORD *)(pt + j)) == (sig & mask)) //Fun entry 1.
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//swprintf(str,L"Entry: 0x%.8X",pt + j);
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//OutputConsole(str);
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return pt + j;
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else
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i += l;
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}
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}
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//OutputConsole(L"Find call and entry failed.");
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return 0;
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}
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DWORD FindCallOrJmpRel(DWORD fun, DWORD size, DWORD pt, bool jmp)
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{
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BYTE sig = (jmp) ? 0xe9 : 0xe8;
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for (DWORD i = 0x1000; i < size - 4; i++)
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if (sig == *(BYTE *)(pt + i)) {
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DWORD t = *(DWORD *)(pt + i + 1);
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if(fun == pt + i + 5 + t)
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//OutputDWORD(pt + i);
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return pt + i;
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else
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i += 5;
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}
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return 0;
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}
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DWORD FindCallOrJmpAbs(DWORD fun, DWORD size, DWORD pt, bool jmp)
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{
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WORD sig = jmp ? 0x25ff : 0x15ff;
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for (DWORD i = 0x1000; i < size - 4; i++)
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if (sig == *(WORD *)(pt + i)) {
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DWORD t = *(DWORD *)(pt + i + 2);
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if (t > pt && t < pt + size) {
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if (fun == *(DWORD *)t)
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return pt + i;
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else
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i += 5;
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}
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}
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return 0;
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}
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DWORD FindCallBoth(DWORD fun, DWORD size, DWORD pt)
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{
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for (DWORD i = 0x1000; i < size - 4; i++) {
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if (*(BYTE *)(pt + i) == 0xe8) {
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DWORD t = *(DWORD *)(pt + i + 1) + pt + i + 5;
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if (t == fun)
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return i;
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}
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if (*(WORD *)(pt + i) == 0x15ff) {
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DWORD t = *(DWORD *)(pt + i + 2);
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if (t >= pt && t <= pt + size - 4) {
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if (*(DWORD *)t == fun)
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return i;
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else
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i += 6;
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}
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}
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}
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return 0;
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}
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DWORD FindCallAndEntryAbs(DWORD fun, DWORD size, DWORD pt, DWORD sig)
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{
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//WCHAR str[0x40];
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enum { reverse_length = 0x800 };
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DWORD mask = SigMask(sig);
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for (DWORD i = 0x1000; i < size - 4; i++)
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if (*(WORD *)(pt + i) == 0x15ff) {
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DWORD t = *(DWORD *)(pt + i + 2);
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if (t >= pt && t <= pt + size - 4) {
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if (*(DWORD *)t == fun)
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//swprintf(str,L"CALL addr: 0x%.8X",pt + i);
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//OutputConsole(str);
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for (DWORD j = i ; j > i - reverse_length; j--)
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if ((*(DWORD *)(pt + j) & mask) == sig) // Fun entry 1.
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//swprintf(str,L"Entry: 0x%.8X",pt + j);
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//OutputConsole(str);
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return pt + j;
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} else
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i += 6;
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}
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//OutputConsole(L"Find call and entry failed.");
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return 0;
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}
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DWORD FindCallAndEntryRel(DWORD fun, DWORD size, DWORD pt, DWORD sig)
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{
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//WCHAR str[0x40];
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enum { reverse_length = 0x800 };
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if (DWORD i = FindCallOrJmpRel(fun, size, pt, false)) {
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DWORD mask = SigMask(sig);
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for (DWORD j = i; j > i - reverse_length; j--)
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if (((*(DWORD *)j) & mask) == sig) //Fun entry 1.
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//swprintf(str,L"Entry: 0x%.8X",j);
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//OutputConsole(str);
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return j;
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//OutputConsole(L"Find call and entry failed.");
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}
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return 0;
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}
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DWORD FindImportEntry(DWORD hModule, DWORD fun)
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{
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IMAGE_DOS_HEADER *DosHdr;
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IMAGE_NT_HEADERS *NtHdr;
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DWORD IAT, end, pt, addr;
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DosHdr = (IMAGE_DOS_HEADER *)hModule;
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if (IMAGE_DOS_SIGNATURE == DosHdr->e_magic) {
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NtHdr = (IMAGE_NT_HEADERS *)(hModule + DosHdr->e_lfanew);
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if (IMAGE_NT_SIGNATURE == NtHdr->Signature) {
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IAT = NtHdr->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_IAT].VirtualAddress;
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end = NtHdr->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_IAT].Size;
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IAT += hModule;
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end += IAT;
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for (pt = IAT; pt < end; pt += 4) {
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addr = *(DWORD *)pt;
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if (addr == fun)
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return pt;
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}
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}
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}
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return 0;
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}
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#endif
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bool CheckFile(LPCWSTR name)
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{
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WIN32_FIND_DATAW unused;
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HANDLE file = FindFirstFileW(name, &unused);
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if (file != INVALID_HANDLE_VALUE)
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{
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FindClose(file);
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return true;
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}
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wchar_t path[MAX_PATH * 2];
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wchar_t* end = path + GetModuleFileNameW(nullptr, path, MAX_PATH);
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while (*(--end) != L'\\');
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wcscpy_s(end + 1, MAX_PATH, name);
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file = FindFirstFileW(path, &unused);
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if (file != INVALID_HANDLE_VALUE)
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{
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FindClose(file);
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return true;
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}
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return false;
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}
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// Search string in rsrc section. This section usually contains version and copyright info.
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bool SearchResourceString(LPCWSTR str)
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{
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uintptr_t hModule = (uintptr_t)GetModuleHandleW(nullptr);
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IMAGE_DOS_HEADER *DosHdr;
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IMAGE_NT_HEADERS *NtHdr;
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DosHdr = (IMAGE_DOS_HEADER *)hModule;
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uintptr_t rsrc, size;
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if (IMAGE_DOS_SIGNATURE == DosHdr->e_magic) {
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NtHdr = (IMAGE_NT_HEADERS *)(hModule + DosHdr->e_lfanew);
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if (IMAGE_NT_SIGNATURE == NtHdr->Signature) {
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rsrc = NtHdr->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_RESOURCE].VirtualAddress;
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if (rsrc) {
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rsrc += hModule;
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if (IthGetMemoryRange((LPVOID)rsrc, &rsrc ,&size) &&
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SearchPattern(rsrc, size - 4, str, wcslen(str) << 1))
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return true;
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}
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}
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}
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return false;
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}
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std::pair<uintptr_t, uintptr_t> QueryModuleLimits(HMODULE module,uintptr_t addition,DWORD protect)
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{
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uintptr_t moduleStartAddress = (uintptr_t)module + addition;
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uintptr_t moduleStopAddress = moduleStartAddress;
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MEMORY_BASIC_INFORMATION info;
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do
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{
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VirtualQuery((void*)moduleStopAddress, &info, sizeof(info));
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moduleStopAddress = (uintptr_t)info.BaseAddress + info.RegionSize;
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} while (info.Protect>=protect);
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moduleStopAddress -= info.RegionSize;
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return { moduleStartAddress, moduleStopAddress };
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}
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std::vector<uintptr_t> SearchMemory(const void* bytes, short length, DWORD protect, uintptr_t minAddr, uintptr_t maxAddr)
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{
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SYSTEM_INFO systemInfo;
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GetNativeSystemInfo(&systemInfo);
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std::vector<std::pair<uintptr_t, uintptr_t>> validMemory;
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for (BYTE* probe = NULL; probe < systemInfo.lpMaximumApplicationAddress;)
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{
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MEMORY_BASIC_INFORMATION info = {};
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if (!VirtualQuery(probe, &info, sizeof(info)))
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{
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probe += systemInfo.dwPageSize;
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continue;
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}
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else
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{
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if ((uintptr_t)info.BaseAddress + info.RegionSize >= minAddr && info.Protect >= protect && !(info.Protect & PAGE_GUARD))
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validMemory.push_back({ (uintptr_t)info.BaseAddress, info.RegionSize });
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probe += info.RegionSize;
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}
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}
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std::vector<uintptr_t> ret;
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for (auto memory : validMemory)
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for (uintptr_t addr = max(memory.first, minAddr); true;)
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if (addr < maxAddr && (addr = SafeSearchMemory(addr, memory.first + memory.second, (const BYTE*)bytes, length)))
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ret.push_back(addr++);
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else break;
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return ret;
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}
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uintptr_t FindFunction(const char* function)
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{
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static HMODULE modules[300] = {};
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static auto _ = EnumProcessModules(GetCurrentProcess(), modules, sizeof(modules), DUMMY);
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for (auto module : modules) if (auto addr = GetProcAddress(module, function)) return (uintptr_t)addr;
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return 0;
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}
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}
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#ifndef _WIN64
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ULONG SafeFindEnclosingAlignedFunction(DWORD addr, DWORD range)
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{
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ULONG r = 0;
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__try{
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r = MemDbg::findEnclosingAlignedFunction(addr, range); // this function might raise if failed
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}__except(EXCEPTION_EXECUTE_HANDLER) {}
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return r;
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}
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ULONG SafeFindBytes(LPCVOID pattern, DWORD patternSize, DWORD lowerBound, DWORD upperBound)
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{
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ULONG r = 0;
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__try{
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r = MemDbg::findBytes(pattern, patternSize, lowerBound, upperBound);
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}__except(EXCEPTION_EXECUTE_HANDLER) {}
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return r;
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}
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// jichi 7/17/2014: Search mapped memory for emulators
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ULONG _SafeMatchBytesInMappedMemory(LPCVOID pattern, DWORD patternSize, BYTE wildcard,
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ULONG start, ULONG stop, ULONG step)
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{
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for (ULONG i = start; i < stop; i += step) // + patternSize to avoid overlap
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if (ULONG r = SafeFindBytes(pattern, patternSize, i, i + step + patternSize + 1))
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return r;
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return 0;
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}
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ULONG SafeMatchBytesInGCMemory(LPCVOID pattern, DWORD patternSize)
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{
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enum : ULONG {
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start = MemDbg::MappedMemoryStartAddress // 0x01000000
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, stop = MemDbg::MemoryStopAddress // 0x7ffeffff
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, step = start
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};
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return _SafeMatchBytesInMappedMemory(pattern, patternSize, XX, start, stop, step);
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}
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#endif
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#ifndef _WIN64
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std::vector<DWORD> findrelativecall(const BYTE* pattern ,int length,DWORD calladdress,DWORD start, DWORD end)
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{
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std::vector<DWORD> save;
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for (; start < end;start+=1 ) {
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DWORD addr=MemDbg::findBytes(pattern, length, start, end);
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start = addr;
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if (!addr)return save;
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BYTE callop = 0xE8;
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union little {
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DWORD _dw;
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BYTE _bytes[4];
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}relative;
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relative._dw = (calladdress - addr -length- 5);
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DWORD calladdr = addr + length;
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if (*((BYTE*)calladdr) == callop) {
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calladdr += 1;
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BYTE* _b = (BYTE*)calladdr;
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BYTE* _a = relative._bytes;
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/*ConsoleOutput("%p", addr);
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ConsoleOutput("%p %x", calladdress, relative._dw);
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ConsoleOutput("%02x%02x%02x%02x %02x%02x%02x%02x", _a[0], _a[1], _a[2], _a[3], _b[0], _b[1], _b[2], _b[3]);*/
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if ((_a[0] == _b[0]) && (_a[1] == _b[1]) && (_a[2] == _b[2]) && (_a[3] == _b[3])) {
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save.push_back(start);
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}
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}
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}
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return save;
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}
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std::vector<DWORD> findxref_reverse_checkcallop(DWORD addr, DWORD from, DWORD to,BYTE op) {
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//op可以为E8 call E9 jump
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//上面的版本其实就应该checkcallop的，之前忘了，但不敢乱改破坏之前的了，不然还要重新测试。
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std::vector<DWORD> res;
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if (addr == 0)return res;
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DWORD now = to;
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while (now > from) {
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DWORD calladdr = now - 5;
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if(IsBadReadPtr((LPVOID)(calladdr + 1),4)==0){
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DWORD relative = *(DWORD*)(calladdr + 1);
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if (now + relative == addr) {
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if(*(BYTE*)calladdr==op)
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res.push_back(calladdr);
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}
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}
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now -= 1;
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}
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return res;
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}
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uintptr_t finddllfunctioncall(uintptr_t funcptr,uintptr_t start, uintptr_t end,WORD sig,bool reverse){
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auto entry=Util::FindImportEntry(start,funcptr);
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if(entry==0)return 0;
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BYTE bytes[]={0xFF,0x15,XX4};
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memcpy(bytes+2,&entry,4);
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memcpy(bytes,&sig,2);
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if(reverse)
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return reverseFindBytes(bytes,sizeof(bytes),start,end);
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else
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return MemDbg::findBytes(bytes,sizeof(bytes),start,end);
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}
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uintptr_t findfuncstart(uintptr_t addr,uintptr_t range){
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const BYTE funcstart[] = {
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0x55,0x8b,0xec
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};
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addr = reverseFindBytes(funcstart, sizeof(funcstart), addr-range, addr);
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return addr;
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}
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#endif
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uintptr_t reverseFindBytes(const BYTE* pattern, int length, uintptr_t start, uintptr_t end) {
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for (end -= length; end >= start; end -= 1) {
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bool success=true;
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for(int i=0;i<length;i++){
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if(pattern[i]!=*(BYTE*)(end+i) && pattern[i]!=XX){
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success=false;break;
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}
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}
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if(success)return end;
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// if (memcmp(pattern, (const BYTE*)(end), length) == 0) {
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// return end;
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// }
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}
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return 0;
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}
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std::vector<uintptr_t> findxref_reverse(uintptr_t addr, uintptr_t from, uintptr_t to) {
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std::vector<uintptr_t> res;
|
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if (addr == 0)return res;
|
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uintptr_t now = to;
|
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while (now > from) {
|
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uintptr_t calladdr = now - 5;
|
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uintptr_t relative = *(int*)(calladdr + 1);
|
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if (now + relative == addr) {
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res.push_back(calladdr);
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}
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now -= 1;
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}
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return res;
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}
|
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int hexCharToValue(char c) {
|
||
if (c >= '0' && c <= '9') {
|
||
return c - '0';
|
||
} else if (c >= 'A' && c <= 'F') {
|
||
return c - 'A' + 10;
|
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} else if (c >= 'a' && c <= 'f') {
|
||
return c - 'a' + 10;
|
||
} else if(c=='?'){
|
||
return -1;
|
||
}
|
||
else{
|
||
return -2;
|
||
}
|
||
}
|
||
uintptr_t find_pattern(const char* pattern,uintptr_t start,uintptr_t end){
|
||
std::vector<int> check;
|
||
bool ignore=false;
|
||
for(int i=0;i<strlen(pattern);i++){
|
||
auto c=pattern[i];
|
||
switch (c)
|
||
{
|
||
case '\n':
|
||
ignore=false; //注释，直到换行
|
||
case ' ': //忽略空格，制表，回车
|
||
case '\t':
|
||
break;
|
||
case '/': //注释
|
||
ignore=true;
|
||
break;
|
||
default:{ //? 0-9A-Fa-f
|
||
auto _i=hexCharToValue(c);
|
||
if(_i==-2)return 0;
|
||
check.push_back(_i);
|
||
}
|
||
}
|
||
}
|
||
if(check.size()%2!=0)return 0;
|
||
std::vector<BYTE>_type,_pattern;
|
||
for(int j=0;j<check.size();j+=2){
|
||
if(check[j]!=-1&&check[j+1]!=-1){
|
||
_type.push_back(0);
|
||
_pattern.push_back(check[j]*0x10+check[j+1]);
|
||
}
|
||
else if(check[j]==-1&&check[j+1]==-1){ //??
|
||
_type.push_back(1);
|
||
_pattern.push_back(0);
|
||
}
|
||
else if(check[j]==-1){ //?_
|
||
_type.push_back(2);
|
||
_pattern.push_back(check[j+1]);
|
||
}
|
||
else{// _?
|
||
_type.push_back(3);
|
||
_pattern.push_back(check[j]*0x10);
|
||
}
|
||
}
|
||
for(uintptr_t i=start;i<end;i++){
|
||
bool succ=true;
|
||
for(int j=0;succ&&(j<_pattern.size());j+=1){
|
||
switch (_type[j])
|
||
{
|
||
case 0:{
|
||
if(_pattern[j]!=*(BYTE*)(i+j)){
|
||
succ=false;
|
||
}
|
||
break;
|
||
}
|
||
case 1:{
|
||
break;
|
||
}
|
||
case 2:{
|
||
if(((*(BYTE*)(i+j))&0xf)!=_pattern[j]){
|
||
succ=false;
|
||
}
|
||
break;
|
||
}
|
||
case 3:{
|
||
if(((*(BYTE*)(i+j))&0xf0)!=_pattern[j]){
|
||
succ=false;
|
||
}
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
if(succ)
|
||
return i;
|
||
}
|
||
return 0;
|
||
}
|
||
|
||
bool Engine::isAddressReadable(const uintptr_t *p)
|
||
{ return p && !::IsBadReadPtr(p, sizeof(*p)); }
|
||
|
||
bool Engine::isAddressReadable(const char *p, size_t count)
|
||
{ return p && count && !::IsBadReadPtr(p, sizeof(*p) * count); }
|
||
|
||
bool Engine::isAddressReadable(const wchar_t *p, size_t count)
|
||
{ return p && count && !::IsBadReadPtr(p, sizeof(*p) * count); }
|
||
|
||
bool Engine::isAddressWritable(const uintptr_t *p)
|
||
{ return p && !::IsBadWritePtr((LPVOID)p, sizeof(*p)); }
|
||
|
||
bool Engine::isAddressWritable(const char *p, size_t count)
|
||
{ return p && count && !::IsBadWritePtr((LPVOID)p, sizeof(*p) * count); }
|
||
|
||
bool Engine::isAddressWritable(const wchar_t *p, size_t count)
|
||
{ return p && count && !::IsBadWritePtr((LPVOID)p, sizeof(*p) * count); } |