Windows内核中是无法使用vector容器等数据结构的，当我们需要保存一个结构体数组时，就需要使用内核中提供的专用链表结构LIST_ENTRY通过一些列链表操作函数对结构体进行装入弹出等操作，如下代码是本人总结的内核中使用链表存储多个结构体的通用案例。
首先实现一个枚举用户进程功能，将枚举到的进程存储到链表结构体内。
代码语言：C复制#include <ntifs.h>
#include <windef.h>
extern PVOID PsGetProcessPeb(_In_ PEPROCESS Process);
NTKERNELAPI NTSTATUS PsLookupProcessByProcessId(HANDLE ProcessId, PEPROCESS *Process);
extern NTKERNELAPI PVOID PsGetProcessWow64Process(_In_ PEPROCESS Process);
extern NTKERNELAPI UCHAR* PsGetProcessImageFileName(IN PEPROCESS Process);
extern NTKERNELAPI HANDLE PsGetProcessInheritedFromUniqueProcessId(IN PEPROCESS Process);
typedef struct
{
DWORD Pid;
UCHAR ProcessName[2048];
DWORD Handle;
LIST_ENTRY ListEntry;
}ProcessList;
// 根据进程ID返回进程EPROCESS结构体失败返回NULL
PEPROCESS LookupProcess(HANDLE Pid)
{
PEPROCESS eprocess = NULL;
NTSTATUS Status = STATUS_UNSUCCESSFUL;
Status = PsLookupProcessByProcessId(Pid, &eprocess);
if (NT_SUCCESS(Status))
{
return eprocess;
}
return NULL;
}
// 内核链表操作
// By: LyShark
BOOLEAN GetAllProcess()
{
PEPROCESS eproc = NULL;
LIST_ENTRY linkListHead;
// 初始化链表头部
InitializeListHead(&linkListHead);
ProcessList *pData = NULL;
for (int temp = 0; temp < 100000; temp = 4)
{
eproc = LookupProcess((HANDLE)temp);
if (eproc != NULL)
{
STRING nowProcessnameString = { 0 };
RtlInitString(&nowProcessnameString, PsGetProcessImageFileName(eproc));
// DbgPrint("进程名: %s --> 进程PID = %d --> 父进程PPID = %drn",
// PsGetProcessImageFileName(eproc), PsGetProcessId(eproc), PsGetProcessInheritedFromUniqueProcessId(eproc));
// 分配内核堆空间
pData = (ProcessList *)ExAllocatePool(PagedPool, sizeof(ProcessList));
RtlZeroMemory(pData, sizeof(ProcessList));
// 设置变量
pData->Pid = (DWORD)PsGetProcessId(eproc);
RtlCopyMemory(pData->ProcessName, PsGetProcessImageFileName(eproc), strlen(PsGetProcessImageFileName(eproc)) * 2);
pData->Handle = (DWORD)PsGetProcessInheritedFromUniqueProcessId(eproc);
// 插入元素到
InsertTailList(&linkListHead, &pData->ListEntry);
ObDereferenceObject(eproc);
}
}
// 输出链表内的数据
while (!IsListEmpty(&linkListHead))
{
LIST_ENTRY *pEntry = RemoveHeadList(&linkListHead);
pData = CONTAINING_RECORD(pEntry, ProcessList, ListEntry);
DbgPrint("%d n", pData->Pid);
DbgPrint("%s n", pData->ProcessName);
DbgPrint("%d n", pData->Handle);
ExFreePool(pData);
}
return TRUE;
}
VOID UnDriver(PDRIVER_OBJECT driver)
{
DbgPrint(("Uninstall Driver Is OK n"));
}
NTSTATUS DriverEntry(IN PDRIVER_OBJECT Driver, PUNICODE_STRING RegistryPath)
{
DbgPrint("hello lyshark.com n");
GetAllProcess();
Driver->DriverUnload = UnDriver;
return STATUS_SUCCESS;
}运行后将可以在DbgView中看到输出的进程信息：
image.png如果需要返回一个结构体，则可以这样来写代码。
代码语言：C复制#include <ntifs.h>
#include <windef.h>
typedef struct
{
int count;
char username[256];
char password[256];
}MyData;
// 模拟返回一个结构
BOOLEAN GetProcess(PVOID OutPut)
{
RtlZeroMemory(OutPut, sizeof(MyData));
MyData *data = OutPut;
data->count = 100;
RtlCopyMemory(data->username, "lyshark.com", sizeof("lyshark.com"));
RtlCopyMemory(data->password, "https://www.cnblogs.com/lyshark", sizeof("https://www.cnblogs.com/lyshark"));
return TRUE;
}
VOID UnDriver(PDRIVER_OBJECT driver)
{
DbgPrint(("Uninstall Driver Is OK n"));
}
NTSTATUS DriverEntry(IN PDRIVER_OBJECT Driver, PUNICODE_STRING RegistryPath)
{
DbgPrint("hello lyshark.com n");
PVOID Ptr = (PVOID)ExAllocatePool(NonPagedPool, sizeof(MyData));
GetProcess(Ptr);
MyData *data = (MyData *)Ptr;
DbgPrint("count = %d n", data->count);
DbgPrint("username = %s n", data->username);
DbgPrint("password = %s n", data->password);
Driver->DriverUnload = UnDriver;
return STATUS_SUCCESS;
}输出效果如下：
image.png
