mirror of
https://github.com/HIllya51/LunaHook.git
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300 lines
10 KiB
C++
300 lines
10 KiB
C++
#include "YukaSystem2.h"
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/** jichi 7/6/2014 YukaSystem2
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* Sample game: セミラミスの天秤
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*
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* Observations from Debug:
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* - Ollydbg got UTF8 text memory address
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* - Hardware break points have loops on 0x4010ED
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* - The hooked function seems to take 3 parameters, and arg3 is the right text
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* - The text appears character by character
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*
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* Runtime stack:
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* - return address
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* - arg1 pointer's pointer
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* - arg2 text
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* - arg3 pointer's pointer
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* - code address or -1, maybe a handle
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* - unknown pointer
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* - return address
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* - usually zero
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*
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* 0040109d cc int3
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* 0040109e cc int3
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* 0040109f cc int3
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* 004010a0 /$ 55 push ebp
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* 004010a1 |. 8bec mov ebp,esp
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* 004010a3 |. 8b45 14 mov eax,dword ptr ss:[ebp+0x14]
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* 004010a6 |. 50 push eax ; /arg4
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* 004010a7 |. 8b4d 10 mov ecx,dword ptr ss:[ebp+0x10] ; |
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* 004010aa |. 51 push ecx ; |arg3
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* 004010ab |. 8b55 0c mov edx,dword ptr ss:[ebp+0xc] ; |
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* 004010ae |. 52 push edx ; |arg2
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* 004010af |. 8b45 08 mov eax,dword ptr ss:[ebp+0x8] ; |
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* 004010b2 |. 50 push eax ; |arg1
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* 004010b3 |. e8 48ffffff call semirami.00401000 ; \semirami.00401000
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* 004010b8 |. 83c4 10 add esp,0x10
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* 004010bb |. 8b45 08 mov eax,dword ptr ss:[ebp+0x8]
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* 004010be |. 5d pop ebp
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* 004010bf \. c3 retn
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* 004010c0 /$ 55 push ebp
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* 004010c1 |. 8bec mov ebp,esp
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* 004010c3 |. 8b45 14 mov eax,dword ptr ss:[ebp+0x14]
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* 004010c6 |. 50 push eax ; /arg4
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* 004010c7 |. 8b4d 10 mov ecx,dword ptr ss:[ebp+0x10] ; |
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* 004010ca |. 51 push ecx ; |arg3
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* 004010cb |. 8b55 0c mov edx,dword ptr ss:[ebp+0xc] ; |
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* 004010ce |. 52 push edx ; |arg2
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* 004010cf |. 8b45 08 mov eax,dword ptr ss:[ebp+0x8] ; |
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* 004010d2 |. 50 push eax ; |arg1
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* 004010d3 |. e8 58ffffff call semirami.00401030 ; \semirami.00401030
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* 004010d8 |. 83c4 10 add esp,0x10
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* 004010db |. 8b45 08 mov eax,dword ptr ss:[ebp+0x8]
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* 004010de |. 5d pop ebp
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* 004010df \. c3 retn
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* 004010e0 /$ 55 push ebp ; jichi: function begin, hook here, bp-based frame, arg2 is the text
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* 004010e1 |. 8bec mov ebp,esp
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* 004010e3 |. 8b45 08 mov eax,dword ptr ss:[ebp+0x8] ; jichi: ebp+0x8 = arg2
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* 004010e6 |. 8b4d 0c mov ecx,dword ptr ss:[ebp+0xc] ; jichi: arg3 is also a pointer of pointer
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* 004010e9 |. 8a11 mov dl,byte ptr ds:[ecx]
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* 004010eb |. 8810 mov byte ptr ds:[eax],dl ; jichi: eax is the data
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* 004010ed |. 5d pop ebp
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* 004010ee \. c3 retn
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* 004010ef cc int3
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*/
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// Ignore image and music file names
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// Sample text: "Voice\tou00012.ogg""運命論って云うのかなあ……神さまを信じてる人が多かったからだろうね、何があっても、それ<E3819D>神さまが<E381BE>刁<EFBFBD>ちに与えられた試練なんだって、そ<E3819D>ってたみたい。勿論、今でもそ<E3819D><E38180>てあ<E381A6>人はぁ<E381AF>ぱぁ<E381B1>るん<E3828B>けど<E38191>
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// Though the input string is UTF-8, it should be ASCII compatible.
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static bool _yk2garbage(const char *p)
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{
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// Q_ASSERT(p);
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while (char ch = *p++)
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{
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if (!(
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ch >= '0' && ch <= '9' ||
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ch >= 'A' && ch <= 'z' || // also ignore ASCII 91-96: [ \ ] ^ _ `
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ch == '"' || ch == '.' || ch == '-' || ch == '#'))
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return false;
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}
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return true;
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}
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// Get text from arg2
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static void SpecialHookYukaSystem2(hook_stack *stack, HookParam *hp, uintptr_t *data, uintptr_t *split, size_t *len)
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{
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DWORD arg2 = stack->stack[2], // [esp+0x8]
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arg3 = stack->stack[3]; // [esp+0xc]
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// arg4 = argof(4, esp_base); // there is no arg4. arg4 is properlly a function pointer
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LPCSTR text = (LPCSTR)arg2;
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if (*text && !_yk2garbage(text))
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{ // I am sure this could be null
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*data = (DWORD)text;
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*len = ::strlen(text); // UTF-8 is null-terminated
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if (arg3)
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*split = *(DWORD *)arg3;
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}
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}
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bool InsertYukaSystem2Hook()
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{
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const BYTE bytes[] = {
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0x55, // 004010e0 /$ 55 push ebp ; jichi; hook here
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0x8b, 0xec, // 004010e1 |. 8bec mov ebp,esp
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0x8b, 0x45, 0x08, // 004010e3 |. 8b45 08 mov eax,dword ptr ss:[ebp+0x8] ; jichi: ebp+0x8 = arg2
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0x8b, 0x4d, 0x0c, // 004010e6 |. 8b4d 0c mov ecx,dword ptr ss:[ebp+0xc]
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0x8a, 0x11, // 004010e9 |. 8a11 mov dl,byte ptr ds:[ecx]
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0x88, 0x10, // 004010eb |. 8810 mov byte ptr ds:[eax],dl ; jichi: eax is the address to text
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0x5d, // 004010ed |. 5d pop ebp
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0xc3 // 004010ee \. c3 retn
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};
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// enum { addr_offset = 0 };
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ULONG range = min(processStopAddress - processStartAddress, MAX_REL_ADDR);
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ULONG addr = MemDbg::findBytes(bytes, sizeof(bytes), processStartAddress, processStartAddress + range);
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// GROWL_DWORD(addr); // supposed to be 0x4010e0
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if (!addr)
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return false;
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HookParam hp;
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hp.address = addr;
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hp.offset = get_stack(1);
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hp.split = get_stack(2);
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hp.type = USING_SPLIT | USING_STRING | CODEC_UTF8; // UTF-8, though
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hp.filter_fun = [](void *data, size_t *len, HookParam *hp)
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{
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// セミラミスの天秤
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// セミラミスの天秤 Fated Dolls
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if (data == 0)
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return false;
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if (all_ascii(reinterpret_cast<char *>(data), *len))
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return false;
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auto str = std::string(reinterpret_cast<char *>(data), *len);
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str = std::regex_replace(str, std::regex(R"(@r\((.*?),(.*?)\))"), "$1");
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auto wstr = StringToWideString(str);
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if (wstr.size() == 1)
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return false;
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for (auto wc : wstr)
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{
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if ((wc >= 'A' && wc <= 'z') ||
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(wc >= '0' && wc <= '9') ||
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(wc == '"') || (wc == '.') || (wc == '-') || (wc == '#') ||
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(wc == 65533) || (wc == 2))
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return false;
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}
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return write_string_overwrite(data, len, str);
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};
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// hp.text_fun = SpecialHookYukaSystem2;
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ConsoleOutput("INSERT YukaSystem2");
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return NewHook(hp, "YukaSystem2");
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}
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namespace
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{
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bool hook2()
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{
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// 君を仰ぎ乙女は姫に
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// ずっとつくしてあげるの!
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const BYTE bytes[] = {
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0x0F, 0xB6, 0x07,
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0x83, 0xE8, 0x40,
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0x75, XX,
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0x0F, 0xB6, 0x47, 0x01,
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0x83, 0xE8, 0x67,
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0x8D, 0x4F, 0x01,
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0x75, XX,
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0x0F, 0xB6, 0x41, 0x01,
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0x83, 0xC1, 0x01,
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0x83, 0xE8, 0x66,
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0x74, XX};
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// enum { addr_offset = 0 };
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ULONG range = min(processStopAddress - processStartAddress, MAX_REL_ADDR);
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ULONG addr = MemDbg::findBytes(bytes, sizeof(bytes), processStartAddress, processStartAddress + range);
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// GROWL_DWORD(addr); // supposed to be 0x4010e0
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if (!addr)
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return false;
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addr = MemDbg::findEnclosingAlignedFunction(addr);
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if (!addr)
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return false;
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HookParam hp;
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hp.address = addr;
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hp.offset = get_stack(2);
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hp.type = USING_SPLIT | DATA_INDIRECT;
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hp.index = 0;
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hp.split = get_stack(1);
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return NewHook(hp, "YukaSystem2");
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}
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}
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namespace __
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{
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bool YukaSystem1Filter(LPVOID data, size_t *size, HookParam *)
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{
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auto text = reinterpret_cast<LPSTR>(data);
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auto len = reinterpret_cast<size_t *>(size);
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if (*len == 0)
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return false;
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// if acii add a space at the end of the sentence overwriting null terminator
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if (*len >= 2 && text[*len - 2] > 0)
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text[(*len)++] = ' ';
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if (cpp_strnstr(text, "@r(", *len))
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{
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StringFilterBetween(text, len, "@r(", 3, ")", 1); // @r(2,はと)
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}
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return true;
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}
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bool InsertYukaSystem1Hook()
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{
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/*
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* Sample games:
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* https://vndb.org/r71601
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* https://vndb.org/v7507
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*/
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const BYTE bytes[] = {
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0x80, 0x3D, XX4, 0x01, // cmp byte ptr [kimihime.exe+16809C],01 << hook here
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0x75, 0x11, // jne kimihime.exe+42D74
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0xB9, XX4, // mov ecx,kimihime.exe+C7F8C
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0xC6, 0x05, XX4, 0x00 // mov byte ptr [kimihime.exe+1516C5],00
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};
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ULONG range = min(processStopAddress - processStartAddress, MAX_REL_ADDR);
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ULONG addr = MemDbg::findBytes(bytes, sizeof(bytes), processStartAddress, processStartAddress + range);
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if (!addr)
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{
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ConsoleOutput("YukaSystem1: pattern not found");
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return false;
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}
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HookParam hp;
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hp.address = addr;
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hp.offset = get_reg(regs::eax);
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hp.type = USING_STRING | KNOWN_UNSTABLE;
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hp.filter_fun = YukaSystem1Filter;
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ConsoleOutput("INSERT YukaSystem1");
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return NewHook(hp, "YukaSystem1");
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}
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}
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namespace
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{
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bool h1()
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{
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// https://vndb.org/v540
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// シャマナシャマナ～月とこころと太陽の魔法～
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auto addr = Util::FindImportEntry(processStartAddress, (DWORD)IsDBCSLeadByteEx);
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if (!addr)
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return false;
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const BYTE bytes[] = {
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0xff, 0x15, XX4,
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0x83, 0xf8, 0x01,
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0x0f, 0x85, XX4,
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0x33, 0xd2,
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0xb9, 0x02, 0x00, 0x00, 0x00,
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0xbf, XX4,
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0x8b, 0xf3,
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0x33, 0xc0,
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0xf3, 0xa6,
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0x74, XX,
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0xb8, XX4,
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0x8a, 0x48, 0x02,
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0x83, 0xc0, 0x02,
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0x83, 0xc2, 0x02,
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0x84, 0xc9,
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0x74, XX,
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0xb9, 0x02, 0x00, 0x00, 0x00,
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0x8b, 0xf8,
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0x8b, 0xf3,
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0x33, 0xed,
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0xf3, 0xa6};
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memcpy((void *)(bytes + 2), &addr, 4);
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addr = MemDbg::findBytes(bytes, sizeof(bytes), processStartAddress, processStopAddress);
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if (!addr)
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return false;
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addr = MemDbg::findEnclosingAlignedFunction(addr, 0x100);
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if (!addr)
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return false;
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HookParam hp;
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hp.address = addr;
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hp.offset = get_stack(2);
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hp.type = USING_CHAR | DATA_INDIRECT;
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hp.filter_fun = [](LPVOID data, size_t *size, HookParam *)
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{
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auto text = reinterpret_cast<LPSTR>(data);
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auto len = reinterpret_cast<size_t *>(size);
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CharFilter(text, len, '@');
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return true;
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};
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return NewHook(hp, "caramelbox");
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}
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}
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bool YukaSystem2::attach_function()
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{
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bool _1 = h1() || __::InsertYukaSystem1Hook();
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return InsertYukaSystem2Hook() || hook2() || _1;
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} |