LunaHook-mirror/LunaHook/engine32/CoffeeMaker.cpp

#include "CoffeeMaker.h"

bool CoffeeMaker_attach_function()
{
  // https://vndb.org/v4025
  // こころナビ
  const BYTE bytes[] = {
      0x81,0xF9,0xD4,0x2B,0x00,0x00,
      0x7F,XX,
      0xB8,0x5D,0x41,0x4C,0xAE,
  };
  auto addr = MemDbg::findBytes(bytes, sizeof(bytes), processStartAddress, processStopAddress);
  if (!addr)
    return false;
  addr = MemDbg::findEnclosingAlignedFunction(addr, 0x10);
  if (!addr)
    return false;
  auto addrs = findxref_reverse_checkcallop(addr, addr - 0x1000, addr + 0x1000, 0xe8);
  if (addrs.size() != 1)
    return false;
  auto addr2 = addrs[0];
  addr2 = MemDbg::findEnclosingAlignedFunction(addr2, 0x40);
  if (!addr2)
    return false;
  HookParam hp;
  hp.address = addr2;
  hp.type = USING_CHAR | CODEC_ANSI_BE | NO_CONTEXT;
  hp.user_value = addr;
  hp.text_fun = [](hook_stack *stack, HookParam *hp, uintptr_t *data, uintptr_t *split, size_t *len)
  {
    auto a2 = stack->stack[1];
    if (a2 > 0x2bd4)
      return;
    auto sub_429050 = (int(__stdcall *)(signed int a1))hp->user_value;
    *data = sub_429050(a2);
    static int idx = 0;
    *len = 2 * (idx % 2);
    idx += 1;
  };

  return NewHook(hp, "CoffeeMaker");
}

bool CoffeeMaker_attach_function2()
{
  // https://vndb.org/v4025
  // こころナビ
  const BYTE bytes[] = {
      0x55,0x8B,0xEC,0x57,0x56,0x8B,0x75,0x0C,0x8B,0x4D,0x10,0x8B,0x7D,0x08,0x8B,0xC1,
      0x8B,0xD1,0x03,0xC6,0x3B,0xFE,0x76,0x08,0x3B,0xF8,0x0F,0x82,XX4,
      0xF7,0xC7,0x03,0x00,0x00,0x00,0x75,XX,0xC1,0xE9,0x02,0x83,0xE2,0x03,0x83,0xF9,0x08
  };
  auto addr = MemDbg::findBytes(bytes, sizeof(bytes), processStartAddress, processStopAddress);
  if (!addr)
    return false;
  HookParam hp;
  hp.address = addr;
  hp.offset=get_stack(1);//get_reg(regs::ecx);//void *__cdecl memcpy(void *a1, const void *Src, size_t Size)
  hp.type = USING_STRING;
  hp.filter_fun=[](void* data, size_t* len, HookParam* hp){
    auto s=std::string((char*)data,*len);
    strReplace(s,R"(\w\w\w)","");
    return write_string_overwrite(data,len,s);
  };
  return NewHook(hp, "CoffeeMaker");
}

bool CoffeeMaker::attach_function()
{
  return CoffeeMaker_attach_function2()||CoffeeMaker_attach_function();
}