驱动保护 -- 读取被保护的数据（第二种方法）

BOOLEAN KReadProcessMemory2(IN PEPROCESS 目标进程, IN PVOID 目标地址, IN UINT32 目标长度, IN PVOID 返回数据)
{
  KAPC_STATE apc_state;
  RtlZeroMemory(&apc_state, sizeof(KAPC_STATE));
  //创建MDL来读取内存
  PMDL 映射内存结构 = IoAllocateMdl(返回数据, 目标长度, 0, 0, NULL);
  if (!映射内存结构)
  {
    return FALSE;
  }
  //将映射内存变成可读
  MmBuildMdlForNonPagedPool(映射内存结构);
  //获取可读的地址
  unsigned char* 可读内存 = (unsigned char*)MmMapLockedPages(映射内存结构, KernelMode); 
  if (!可读内存)
  { 
    IoFreeMdl(映射内存结构);
    return FALSE;
  }
  //切换到目标进程进行操作
  KeStackAttachProcess((PVOID)目标进程, &apc_state);
  //判断该地址是否可读
  BOOLEAN 是否可读 = MmIsAddressValid(目标地址);
  if (是否可读)
  {
    RtlCopyMemory(可读内存, 目标地址, 目标长度); 
  }
  else
  {
    KdPrint(("nxyn2不可读"));
  }
  //恢复环境
  KeUnstackDetachProcess(&apc_state);
  MmUnmapLockedPages((PVOID)可读内存, 映射内存结构);
  IoFreeMdl(映射内存结构);
  return 是否可读;
}
int ReadProcessMemoryForPid2(UINT32 dwPid, PVOID 读取地址, PVOID 读取内容, UINT32 读取大小)
{
  //根据pid获取PEPROCESS
  PEPROCESS Seleted_pEPROCESS = NULL;
  if (PsLookupProcessByProcessId((PVOID)(UINT_PTR)(dwPid), &Seleted_pEPROCESS) == STATUS_SUCCESS)
  {
    BOOLEAN br = KReadProcessMemory2(Seleted_pEPROCESS, (PVOID)读取地址, 读取大小, 读取内容);
    ObDereferenceObject(Seleted_pEPROCESS);
    if (br)
    {
      return 读取大小;
    }
  }
  else
  {
    KdPrint(("nxyn 2读取失败"));
  }
  return 0;
}
NTSTATUS  IRP_ReadProcessMemory2(PIRP pirp)
{
  NTSTATUS ntStatus = STATUS_SUCCESS;
  PIO_STACK_LOCATION     irpStack = NULL;
  irpStack = IoGetCurrentIrpStackLocation(pirp);
#pragma pack(push)
#pragma pack(8)
  typedef struct TINPUT_BUF
  {
    UINT64 dwPid;//目标进程PID
    PVOID pBase; //目标进程地址
    UINT64 nSize;//要读取的长度
  }TINPUT_BUF;
#pragma pack(pop)
  TINPUT_BUF* 输入数据 = (TINPUT_BUF*)(pirp->AssociatedIrp.SystemBuffer);
  ReadProcessMemoryForPid2(输入数据->dwPid, 输入数据->pBase, 输入数据/*保存读取的数据*/, 输入数据->nSize);
  if (irpStack) //
  {
    if (ntStatus == STATUS_SUCCESS)
    { //成功则返回 缓冲区大小
      pirp->IoStatus.Information = irpStack->Parameters.DeviceIoControl.OutputBufferLength;//DeviceIoControl
    }
    else
    { //失败则不返回
      pirp->IoStatus.Information = 0;
    }
    //完成请求
    IoCompleteRequest(pirp, IO_NO_INCREMENT);
  }
  pirp->IoStatus.Status = ntStatus;
  return ntStatus;
}

NTSTATUS  IRP_ReadProcessMemory2(PIRP pirp);

#define irp读被保护数据2   CTL_CODE(FILE_DEVICE_UNKNOWN, 0x807,     METHOD_BUFFERED,FILE_ANY_ACCESS)
else if(控制码== irp读被保护数据2)
    {
      return IRP_ReadProcessMemory2(IRP指针);
    }

#define irp读被保护数据2   CTL_CODE(FILE_DEVICE_UNKNOWN, 0x807,     METHOD_BUFFERED,FILE_ANY_ACCESS)
void CtestDlg::OnBnClickedButtonDqbbhsj2()
{
#pragma pack(push)
#pragma pack(8)
  typedef struct TINPUT_BUF
  {
    UINT64 dwPid;//目标进程PID
    PVOID pBase; //目标进程地址
    UINT64 nSize;//要读取的长度
  }TINPUT_BUF;
#pragma pack(pop)
  UpdateData(true);
  DWORD 返回字节数 = 0;
  DWORD 临时数据 = 0;
  UINT_PTR 地址 = 0x7FF7F8F20000;
  TINPUT_BUF 输入缓存区 = { mbpid,(PVOID)地址,4 };
  DeviceIoControl(
    设备句柄,
    irp读被保护数据2,
    &输入缓存区,
    sizeof(TINPUT_BUF),
    &临时数据,
    sizeof(临时数据),
    &返回字节数,
    NULL
  );
  char 缓存[256];
  sprintf_s(缓存, "2读取被保护值%X", 临时数据);
  ::MessageBoxA(0, 缓存, "2读被保护测试", MB_OK);
}