用Visual studio11在Windows8上开发驱动实现注册表监控和过滤
在Windows NT中，80386保护模式的“保护”比Windows 95中更坚固，这个“镀金的笼子”更加结实，更加难以打破。在Windows 95中，至少应用程序I/O操作是不受限制的，而在Windows NT中，我们的应用程序连这点权限都被剥夺了。在NT中几乎不太可能进入真正的ring0层。
在Windows NT中，存在三种Device Driver：
1．“Virtual device Driver” (VDD)。通过VDD，16位应用程序，如DOS 和Win16应用程序可以访问特定的I/O端口（注意，不是直接访问，而是要通过VDD来实现访问）。
2．“GDI Driver”，提供显示和打印所需的GDI函数。
3．“Kernel Mode Driver”，实现对特定硬件的操作，比如说CreateFile, CloseHandle (对于文件对象而言), ReadFile, WriteFile, DeviceIoControl 等操作。“Kernel Mode Driver”还是Windows NT中唯一可以对硬件中断和DMA进行操作的Driver。SCSI 小端口驱动和 网卡NDIS 驱动都是Kernel Mode Driver的一种特殊形式。
Visual studio11与Windows8带来格外不同的新体验
1.启动Vs11
2.看见满目的驱动开发模板
3.选择一个驱动模式，有内核模式与用户模式两种的驱动
4.创建一个驱动程序，KMDF DriverMVP
5.我们选择的是内核模式的驱动程序，下面是创建成功后的界面，分别是驱动程序本身，与驱动安装包
6.按下F5，选择驱动编译，
插入下列代码实现基于callback的注册表监控和过滤技术，请见代码分析
#include "ntifs.h"#include "RegistryCallBack.h"#include <ntstrsafe.h>NTSTATUS st;LARGE_INTEGER g_CallbackCookie;ANSI_STRING astr; VOID UnloadDriver(PDRIVER_OBJECT DriverObject);NTSTATUS RegistryCallback(IN PVOID CallbackContext, IN PVOID Argument1, IN PVOID Argument2);BOOLEAN GetRegistryObjectCompleteName(PUNICODE_STRING pRegistryPath, PUNICODE_STRING pPartialRegistryPath,PVOID pRegistryObject);NTSTATUS DriverEntry(PDRIVER_OBJECT DriverObject, PUNICODE_STRING RegistryPath){ DbgPrint("[RegRoutine]Loading!\n");DriverObject->DriverUnload = UnloadDriver;st = CmRegisterCallback(RegistryCallback,NULL,&g_CallbackCookie);if ( !NT_SUCCESS(st) ){DbgPrint("[RegRoutine]CmRegisterCallback Failed!\n");return st;}DbgPrint("[RegRoutine]RegistryCallback Addr:0x%08X\n",RegistryCallback);DbgPrint("[RegRoutine]Cookie.LowPart:0x%08X Cookie.HighPart:0x%08X\n",g_CallbackCookie.LowPart,g_CallbackCookie.HighPart); return st;}VOID UnloadDriver(PDRIVER_OBJECT DriverObject){CmUnRegisterCallback(g_CallbackCookie);DbgPrint("[RegRoutine]UnLoading!\n");}NTSTATUS RegistryCallback( IN PVOID CallbackContext, IN PVOID Argument1, IN PVOID Argument2 ){int type;BOOLEAN exception = FALSE;BOOLEAN registryEventIsValid = FALSE;UNICODE_STRING registryPath;UCHAR* registryData = NULL;ULONG registryDataLength = 0;ULONG registryDataType = 0;registryPath.Length = 0;registryPath.MaximumLength = NTSTRSAFE_UNICODE_STRING_MAX_CCH * sizeof(WCHAR);registryPath.Buffer = ExAllocatePoolWithTag(NonPagedPool, registryPath.MaximumLength, 'ConT');if(registryPath.Buffer == NULL){DbgPrint("[RegRoutine]Allocate registryPath failed!\n");return STATUS_SUCCESS;}type = (REG_NOTIFY_CLASS)Argument1;try{switch(type){case RegNtPostCreateKey:{PREG_POST_CREATE_KEY_INFORMATION createKey = (PREG_POST_CREATE_KEY_INFORMATION)Argument2;if( NT_SUCCESS(createKey->Status) || createKey->Status == STATUS_PENDING ) //创建注册表项状态为成功和未决的都记录一下{PVOID* registryObject = createKey->Object;registryEventIsValid = GetRegistryObjectCompleteName(®istryPath, createKey->CompleteName,*registryObject);if ( registryEventIsValid ){RtlUnicodeStringToAnsiString(&astr,®istryPath,TRUE);DbgPrint("[RegCreated]KeyName:%s!\n",astr.Buffer);//如果创建的是自启动项，则警告一下if ( strstr(astr.Buffer,"\\REGISTRY\\MACHINE\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Run") ){DbgPrint("[RegCreated]Forbin!\n");DbgPrint("[RegCreated]ForbinKeyName:%s!\n",astr.Buffer);RtlFreeAnsiString(&astr);}RtlFreeAnsiString(&astr);}elseDbgPrint("[RegCreated]Get Key Name Failed!\n");}}break;//使用PreCreateKey可以阻止key的创建，但是能够作为判断依据的只有一个key的CompleteName，无法得到完整路径来判断case RegNtPreCreateKey:{PREG_PRE_CREATE_KEY_INFORMATION createKey = (PREG_PRE_CREATE_KEY_INFORMATION)Argument2;RtlCopyUnicodeString(®istryPath,createKey->CompleteName);RtlUnicodeStringToAnsiString(&astr,®istryPath,TRUE);DbgPrint("[RegRoutine]PreCreate:%s!\n",astr.Buffer);if ( !strcmp(astr.Buffer,"新项 #1") ){DbgPrint("[RegRoutine]Forbin!\n");DbgPrint("[RegRoutine]ForbinKeyName:%s!\n",astr.Buffer);RtlFreeAnsiString(&astr);return STATUS_INVALID_PARAMETER;}RtlFreeAnsiString(&astr);}break;case RegNtDeleteKey:{PREG_DELETE_KEY_INFORMATION deleteKey = (PREG_DELETE_KEY_INFORMATION)Argument2;registryEventIsValid = GetRegistryObjectCompleteName(®istryPath, NULL, deleteKey->Object);if ( registryEventIsValid ){RtlUnicodeStringToAnsiString(&astr,®istryPath,TRUE);DbgPrint("[RegDeletedKey]KeyName:%s!\n",astr.Buffer);if ( !strcmp(astr.Buffer,"\\REGISTRY\\MACHINE\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Run\\ljh00001") ){DbgPrint("[RegDeletedKey]Forbin!\n");DbgPrint("[RegDeletedKey]ForbinKeyName:%s!\n");RtlFreeAnsiString(&astr);return STATUS_INVALID_PARAMETER;}RtlFreeAnsiString(&astr);}}break;case RegNtSetValueKey:{PREG_SET_VALUE_KEY_INFORMATION setvalue = (PREG_SET_VALUE_KEY_INFORMATION)Argument2;if( MmIsAddressValid(setvalue->ValueName) ){registryEventIsValid = GetRegistryObjectCompleteName(®istryPath, NULL, setvalue->Object);if ( registryEventIsValid ){RtlUnicodeStringToAnsiString(&astr,®istryPath,TRUE);DbgPrint("[RegSetValue]ValueParentPath:%s!\n",astr.Buffer);RtlFreeAnsiString(&astr);}RtlUnicodeStringToAnsiString(&astr,setvalue->ValueName,TRUE);DbgPrint("[RegSetValue]ValueName:%s!\n",astr.Buffer);RtlFreeAnsiString(&astr);//输出设置的键值的数据类型和大小，如果类型是REG_SZ则data是一个unicode_string，而数据大小为buffer长度//加上4字节长度的length和MaxLength再加上2个字节的结尾00的长度DbgPrint("[RegSetValue]ValueDataType:%X,DataSize:%X\n",setvalue->Type,setvalue->DataSize);if ( setvalue->Type == 1 ) //Type为REG_SZ，其它类型的数据暂时忽略 {DbgPrint("[RegSetValue]Data:%ws\n",setvalue->Data);}}}break;case RegNtDeleteValueKey:{PREG_DELETE_VALUE_KEY_INFORMATION deletevalue = (PREG_DELETE_VALUE_KEY_INFORMATION)Argument2;if( MmIsAddressValid(deletevalue->ValueName) ){registryEventIsValid = GetRegistryObjectCompleteName(®istryPath, NULL, deletevalue->Object);if ( registryEventIsValid ){RtlUnicodeStringToAnsiString(&astr,®istryPath,TRUE);DbgPrint("[RegDelValue]ValueParentPath:%s!\n",astr.Buffer);RtlFreeAnsiString(&astr);}RtlUnicodeStringToAnsiString(&astr,deletevalue->ValueName,TRUE);DbgPrint("[RegDelValue]ValueName:%s!\n",astr.Buffer);if ( !strcmp(astr.Buffer,"ljh00001") ){DbgPrint("[RegDelValue]Forbin!\n");DbgPrint("[RegDelValue]ForbinKeyName:%s!\n");RtlFreeAnsiString(&astr);return STATUS_INVALID_PARAMETER;}RtlFreeAnsiString(&astr);}}break;case RegNtRenameKey:{PREG_RENAME_KEY_INFORMATION renamevalue = (PREG_RENAME_KEY_INFORMATION)Argument2;if( MmIsAddressValid(renamevalue->NewName) ){registryEventIsValid = GetRegistryObjectCompleteName(®istryPath, NULL, renamevalue->Object);if ( registryEventIsValid ){RtlUnicodeStringToAnsiString(&astr,®istryPath,TRUE);DbgPrint("[RegRenameKey]KeyPath:%s!\n",astr.Buffer);RtlFreeAnsiString(&astr);}RtlUnicodeStringToAnsiString(&astr,renamevalue->NewName,TRUE);DbgPrint("[RegRenameKey]KeyName:%s!\n",astr.Buffer);RtlFreeAnsiString(&astr);}}break;default:break;}} except( EXCEPTION_EXECUTE_HANDLER ) {DbgPrint("[RegRoutine]Catch a Expection!\n");exception = TRUE;registryEventIsValid = FALSE;}if(registryPath.Buffer != NULL){ExFreePoolWithTag(registryPath.Buffer, 'ConT');}return STATUS_SUCCESS;}BOOLEAN GetRegistryObjectCompleteName(PUNICODE_STRING pRegistryPath, PUNICODE_STRING pPartialRegistryPath, PVOID pRegistryObject){BOOLEAN foundCompleteName = FALSE;BOOLEAN partial = FALSE;NTSTATUS status;ULONG returnedLength;PUNICODE_STRING pObjectName = NULL;//判断object的有效性if( (!MmIsAddressValid(pRegistryObject)) || (pRegistryObject == NULL) ){DbgPrint("[RegRoutine]pRegistryObject Invalid!\n");return FALSE;}//使用ObQueryNameString来得到object对应的名称status = ObQueryNameString(pRegistryObject, (POBJECT_NAME_INFORMATION)pObjectName, 0, &returnedLength );if(status == STATUS_INFO_LENGTH_MISMATCH)//第一次传的buffer长度为0，ObQueryNameString返回的结果必定是缓冲区大小不足{pObjectName = ExAllocatePoolWithTag(NonPagedPool, returnedLength, 'ConT'); //申请内存if ( pObjectName == NULL ) //申请内存失败则返回FALSE{DbgPrint("[RegRoutine]AllocatePool Failed!\n");return FALSE;}//查询名称status = ObQueryNameString(pRegistryObject, (POBJECT_NAME_INFORMATION)pObjectName, returnedLength, &returnedLength );if(NT_SUCCESS(status)){RtlUnicodeStringCopy(pRegistryPath, pObjectName);//拷贝名称foundCompleteName = TRUE;}ExFreePoolWithTag(pObjectName, 'ConT');//无论查询是否成功都应该释放内存 }return foundCompleteName;}