LunaHook-mirror/LunaHook/engine32/hibiki.cpp

#include"hibiki.h"

bool hibikihook() {
  //ＬＯＶＥＬＹ×Ｃ∧ＴＩＯＮ
/*seg000:0044FC05 83 FF 20                      cmp     edi, 20h ; ' '
seg000:0044FC08 0F 84 E6 00 00 00             jz      loc_44FCF4
seg000:0044FC08
seg000:0044FC0E 81 FF 00 30 00 00             cmp     edi, 3000h
seg000:0044FC14 0F 84 E9 00 00 00             jz      loc_44FD03*/
  const BYTE bytes[] = {
        0x83,0xff,0x20,
        0x0f,0x84,XX4,
        0x81,0xff,0x00,0x30,0x00,0x00,
        0x0f,0x84,XX4
  };

  auto addrs = Util::SearchMemory(bytes, sizeof(bytes), PAGE_EXECUTE, processStartAddress, processStopAddress);
  bool succ=false;
  for (auto addr :addrs) {
    addr = MemDbg::findEnclosingAlignedFunction(addr);
    if (!addr) { continue; }
    HookParam hp;
    hp.address =  addr;

    hp.offset =get_stack(3);
    hp.type = CODEC_UTF16;


    ConsoleOutput("INSERT hibiki_extra %p",addr);
    
    succ|=NewHook(hp, "hibiki_extra"); 
    }
      
    
    
  return succ;

}
bool YaneSDKFilter(LPVOID data, size_t *size, HookParam *)
{
  auto text = reinterpret_cast<LPWSTR>(data);
  auto len = reinterpret_cast<size_t *>(size);
  static std::wstring prevText;

  if (!*len)
    return false;
  text[*len/sizeof(wchar_t)] = L'\0';  // clean text

  if (!prevText.compare(text))
    return false;
  prevText = text;

  StringCharReplacer(text, len, L"[r]", 3, L' ');
  StringFilter(text, len, L"[np]", 4);

  if (cpp_wcsnstr(text, L"'", *len/sizeof(wchar_t))) { // [桜木'さくらぎ]
    StringFilterBetween(text, len, L"'", 1, L"]", 1);
  }
  CharFilter(text, len, L'[');
  CharFilter(text, len, L']');

  return true;
}

bool InsertYaneSDKHook() 
{
  
  /*
  * Sample games:
  * https://vndb.org/v21734
  * https://vndb.org/v21455
  * https://vndb.org/v20406
  */
  const BYTE bytes[] = {
    0x83, 0xF9, 0x08,             // cmp ecx,08         << hook here
    0x8D, 0x45, 0x0C,             // lea eax,[ebp+0C]
    0x8D, 0x4D, 0xBC,             // lea ecx,[ebp-44]
    0x0F, 0x43, 0xC2,             // cmovae eax,edx
    0x0F, 0xB7, 0x04, 0x70        // movzx eax,word ptr [eax+esi*2]
  };

  ULONG range = min(processStopAddress - processStartAddress, MAX_REL_ADDR);
  ULONG addr = MemDbg::findBytes(bytes, sizeof(bytes), processStartAddress, processStartAddress + range);
  if (!addr) {
    ConsoleOutput("YaneSDK: pattern not found");
    return false;
  }

  HookParam hp;
  hp.address = addr;
  hp.offset=get_reg(regs::eax);
  hp.filter_fun = YaneSDKFilter;
  hp.type = CODEC_UTF16 | USING_STRING | NO_CONTEXT;
  ConsoleOutput("INSERT YaneSDK");
  
  return NewHook(hp, "YaneSDK");
}		
bool hibiki::attach_function() {  
     
    return hibikihook()||InsertYaneSDKHook();
}