mirror of
https://github.com/HIllya51/LunaHook.git
synced 2024-11-24 06:15:35 +08:00
302 lines
9.2 KiB
C++
302 lines
9.2 KiB
C++
#include"V8.h"
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// Artikash 6/23/2019: V8 (JavaScript runtime) has rcx = string** at v8::String::Write
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// sample game https://www.freem.ne.jp/dl/win/18963
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bool InsertV8Hook(HMODULE module)
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{
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uint64_t addr1 = (uint64_t)GetProcAddress(module, "?Write@String@v8@@QEBAHPEAGHHH@Z"),
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// Artikash 6/7/2021: Add new hook for new version of V8 used by RPG Maker MZ
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addr2 = (uint64_t)GetProcAddress(module, "??$WriteToFlat@G@String@internal@v8@@SAXV012@PEAGHH@Z");
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if (addr1 || addr2)
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{
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std::tie(spDefault.minAddress, spDefault.maxAddress) = Util::QueryModuleLimits(module);
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spDefault.maxRecords = Util::SearchMemory(spDefault.pattern, spDefault.length, PAGE_EXECUTE, spDefault.minAddress, spDefault.maxAddress).size() * 20;
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ConsoleOutput("JavaScript hook is known to be low quality: try searching for hooks if you don't like it");
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}
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auto succ=false;
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if (addr1)
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{
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HookParam hp;
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hp.type = USING_STRING | CODEC_UTF16;
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hp.address = addr1;
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hp.text_fun = [](hook_stack* stack, HookParam *hp, uintptr_t* data, uintptr_t* split, size_t* count)
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{
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*data=(*(uintptr_t*)(stack->rcx))+23;
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int len = *(int*)(*data - 4);
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if(wcslen((wchar_t*)*data)*2<len)return;
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*count=len*2;
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};
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succ|=NewHook(hp, "JavaScript");
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}
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if (addr2)
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{
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HookParam hp;
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hp.type = USING_STRING | CODEC_UTF16;
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hp.address = addr2;
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hp.text_fun = [](hook_stack* stack, HookParam *hp, uintptr_t* data, uintptr_t* split, size_t* count)
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{
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*data=(stack->rcx)+11;
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int len = *(int*)(*data - 4);
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if(wcslen((wchar_t*)*data)*2<len)return;
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*count=len*2;
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};
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succ|=NewHook(hp, "JavaScript");
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}
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return succ;
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}
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bool hookv8exports(HMODULE module) {
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enum { rcx=-0x1c };
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auto addr = GetProcAddress(module, "?Write@String@v8@@QEBAHPEAVIsolate@2@PEAGHHH@Z");
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if (addr == 0)return false;
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HookParam hp;
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hp.address = (uint64_t)addr ;
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hp.type = USING_STRING | CODEC_UTF16 |NO_CONTEXT;
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hp.text_fun = [](hook_stack* stack, HookParam *hp, uintptr_t* data, uintptr_t* split, size_t* count)
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{
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*data=*(uintptr_t*)(stack->rcx)+0xf;
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int len = *(uintptr_t*)((uintptr_t)*data - 4);
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if(strlen((char*)*data)==len){
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*count = len;
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hp->type=USING_STRING|CODEC_UTF8| DATA_INDIRECT|NO_CONTEXT;
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*split = (strchr((char*)*data, '<') != nullptr)&&(strchr((char*)*data, '>') != nullptr);
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*split+=0x10;
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}
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else if((wcslen((wchar_t*)*data)==len)){
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*count = len*2;
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*split = (wcschr((wchar_t*)*data, L'<') != nullptr)&&(wcschr((wchar_t*)*data, L'>') != nullptr);
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hp->type=USING_STRING|CODEC_UTF16| DATA_INDIRECT|NO_CONTEXT;
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}
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else{
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//ConsoleOutput("%d %d %d",len,strlen((char*)*data),wcslen((wchar_t*)*data));
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return;
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}
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};
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// hp.filter_fun=[](void* data, uintptr_t* size, HookParam*) {
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// auto text = reinterpret_cast<LPWSTR>(data);
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// std::wstring str = text;
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// str = str.substr(0, *size / 2);
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// std::wregex reg1(L"<rt>(.*?)</rt>");
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// std::wstring result2 = std::regex_replace(str, reg1, L"");
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// std::wregex reg12(L"<span(.*?)visibility: visible(.*?)>(.*?)</span>");
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// result2 = std::regex_replace(result2, reg12, L"");
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// std::wregex reg2(L"<(.*?)>");
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// result2 = std::regex_replace(result2, reg2, L"");
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// std::wregex reg22(L"\n");
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// result2 = std::regex_replace(result2, reg22, L"");
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// *size = (result2.size()) * 2;
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// wcscpy(text, result2.c_str());
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// return true;
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// };
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return NewHook(hp, "Write@String@v8");
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}
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namespace{
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uintptr_t forwardsearch(BYTE* b,int size,uintptr_t addr,int range){
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for(int i=0;i<range;i++){
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bool ok=true;
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for(int j=0;j<size;j++){
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if((*(BYTE*)(b+j))==XX)continue;
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if((*(BYTE*)(b+j))!=((*(BYTE*)(addr+i+j)))){
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ok=false;break;
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}
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}
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if(ok){
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return addr+i;
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}
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}
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return 0;
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}
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regs andregimm(BYTE* b){
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if(*b==0x81)
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switch (*(b+1))
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{
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case 0xe1:return regs::rcx;//rcx
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case 0xe2:return regs::rdx;//rdx
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case 0xe3:return regs::rbp;//rbx
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case 0xe5:return regs::rbp;//rbp
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case 0xe6:return regs::rsi;//rsi
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case 0xe7:return regs::rdi;//rdi
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default:return regs::invalid;
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}
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else
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return regs::invalid;
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}
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std::vector<HookParam> hookw(HMODULE module){
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const BYTE BYTES[] = {
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0x81,XX,0x00,0xf8,0x00,0x00
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};
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std::vector<HookParam>save;
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auto addrs = Util::SearchMemory(BYTES, sizeof(BYTES), PAGE_EXECUTE, processStartAddress, processStopAddress);
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for(auto addr:addrs){
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auto addrsave=addr;
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BYTE sig1[]={0x81,XX,0x00,0xD8,0x00,0x00};
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BYTE sig2[]={0x81,XX,0x00,0xFC,0x00,0x00};
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BYTE sig3[]={0x81,XX,0x00,0xDC,0x00,0x00};
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BYTE sig4[]={XX,0x00,0x24,0xA0,0xFC};
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addr=forwardsearch(sig1,sizeof(sig1),addr,0x20);
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if(addr==0)continue;
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addr=forwardsearch(sig2,sizeof(sig2),addr,0x100);
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if(addr==0)continue;
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addr=forwardsearch(sig3,sizeof(sig3),addr,0x20);
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if(addr==0)continue;
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addr=forwardsearch(sig4,sizeof(sig4),addr,0x20);
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if(addr==0)continue;
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auto off=andregimm((BYTE*)addrsave);
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if(off==regs::invalid)continue;
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HookParam hp;
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hp.address = (uint64_t)addrsave ;
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hp.type = CODEC_UTF16|NO_CONTEXT ;
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hp.offset =get_reg(off);
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save.push_back(hp);
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}
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return save;
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}
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std::vector<HookParam> v8hook1(HMODULE module) {
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const BYTE BYTES[] = {
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0x81,0xE1,0x00,0xF8,0x00,0x00,
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0x41,0xBE,0x01,0x00,0x00,0x00,
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0x81,0xF9,0x00,0xD8,0x00,0x00
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};
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auto addrs = Util::SearchMemory(BYTES, sizeof(BYTES), PAGE_EXECUTE, processStartAddress, processStopAddress);
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if (addrs.size() != 1)return {};
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auto addr = (uint64_t)addrs[0];
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const BYTE start[] = {
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0xCC
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};
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const BYTE start2[] = {
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0x41,0x57,0x41,0x56,0x41,0x55,0x41,0x54
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};
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addr=reverseFindBytes(start, sizeof(start), addr - 0x1000, addr);
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if (addr == 0)return {};
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addr += 1;
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addrs = findxref_reverse(addr, addr - 0x10000, addr + 0x10000);
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if (addrs.size() != 1)return {};
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addr = addrs[0];
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addr = reverseFindBytes(start2, sizeof(start2), addr - 0x1000, addr);
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if (addr == 0)return {};
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addrs = findxref_reverse(addr, addr - 0x10000, addr + 0x10000);
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std::vector<HookParam> save;
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for (auto addr : addrs) {
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addr = reverseFindBytes(start2, sizeof(start2), addr - 0x1000, addr);
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if (addr == 0)continue;
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HookParam hp;
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hp.address = (uint64_t)addr;
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hp.type = USING_STRING | CODEC_UTF16 | DATA_INDIRECT;
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hp.offset=get_reg(regs::rcx);
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hp.padding = 0xC;
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hp.index = 0;
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save.push_back(hp);
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}
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return save;
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}
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bool innerHTML(HMODULE module) {
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//花葬
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//result = sub_142DF3CA0(a2, v5, 1u, (__int64)"innerHTML", a3);
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//r10当全为ascii是普通string，否则为wchar_t
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//a3是一个callback,并不是字符串。
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char innerHTML[]="innerHTML";
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auto addr = MemDbg::findBytes(innerHTML, sizeof(innerHTML), processStartAddress, processStopAddress);
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ConsoleOutput("%x",addr);
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if(addr==0)return false;
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bool ok=false;
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for(auto _addr=processStartAddress+4;_addr<processStopAddress;_addr+=1){
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if((_addr+*(int*)(_addr-4) )==addr){
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ConsoleOutput("%x",_addr-processStartAddress);
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for(int i=0;i<0x20;i++){
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if(*(BYTE*)(_addr+i)==0xe8){
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uintptr_t subaddr=_addr+i+5+*(int*)(_addr+i+1);
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HookParam hp;
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hp.address = (uint64_t)subaddr;
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hp.type = USING_STRING | CODEC_UTF16 ;
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hp.offset=get_reg(regs::r10);
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hp.text_fun=[](hook_stack* stack, HookParam* hp, uintptr_t* data, uintptr_t* split, size_t* len){
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auto text =stack->r10;
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if(strlen((char*) text)>1){
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hp->type=USING_STRING|CODEC_UTF8|NO_CONTEXT;
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*split=0x1;
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*len=strrchr((char*)text,'>')+1-(char*)text;
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}
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else{
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hp->type=USING_STRING|CODEC_UTF16|NO_CONTEXT;
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*split=0x10;
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*len=wcsrchr((wchar_t*)text,L'>')+1-(wchar_t*)text;
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*len*=2;
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}
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};
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ok|=NewHook(hp,"innerHTML");
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}
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}
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}
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}
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return ok;
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}
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bool addhooks(HMODULE module){
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if (GetProcAddress(module, "?Write@String@v8@@QEBAHPEAVIsolate@2@PEAGHHH@Z") == 0)return false;
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bool success=false;
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for(auto h:v8hook1(module)){
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success|=NewHook(h,"electronQ");
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}
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for(auto h:hookw(module)){
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success|=NewHook(h,"electronW");
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}
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return innerHTML(module)|| success;
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}
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}
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namespace{
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bool hookstringlength(HMODULE hm){
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auto Length=GetProcAddress(hm,"?Length@String@v8@@QEBAHXZ");
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static uintptr_t WriteUtf8;
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static uintptr_t Utf8Length;
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WriteUtf8=(uintptr_t)GetProcAddress(hm,"?WriteUtf8@String@v8@@QEBAHPEADHPEAHH@Z");
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Utf8Length=(uintptr_t)GetProcAddress(hm,"?Utf8Length@String@v8@@QEBAHXZ");
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if(Length==0||WriteUtf8==0||Utf8Length==0)return false;
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HookParam hp;
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hp.address=(uintptr_t)Length;
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hp.type=USING_STRING|CODEC_UTF8;
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hp.text_fun=
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[](hook_stack* stack, HookParam* hp, uintptr_t* data, uintptr_t* split, size_t* len)
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{
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auto length=((size_t(*)(void*))Utf8Length)((void*)stack->rcx);
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auto u8str=new char[length+1];
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int writen;
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((size_t(*)(void*,char*,int,int*,int))WriteUtf8)((void*)stack->rcx,u8str,length,&writen,0);
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*data=(uintptr_t)u8str;
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*len=length;
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};
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return NewHook(hp,"v8::String::Length");
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}
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}
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bool V8::attach_function_() {
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for (const wchar_t* moduleName : { (const wchar_t*)NULL, L"node.dll", L"nw.dll" }) {
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auto hm=GetModuleHandleW(moduleName);
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if(hm==0)continue;
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bool ok=InsertV8Hook(hm);
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ok= hookv8exports(hm)||ok;
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ok=hookstringlength(hm)||ok;
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ok=addhooks(hm)||ok;
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if(ok){
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return true;
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}
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}
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return false;
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}
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